Auxiliary badminton training device for competitive sports

The invention discloses a badminton auxiliary training device for competitive sports, which comprises a movable base, two groups of ear plates are arranged at the bottom of the movable base, each group of ear plates comprises two ear plates, a connecting shaft is connected between the two ear plates, two ends of the connecting shaft are connected with walking wheels, and the top of the movable base is connected with a support frame. A conveying mechanism is arranged on the supporting frame, a feeding mechanism is arranged at the input end of the conveying mechanism, a discharging mechanism is arranged at the output end of the conveying mechanism, and a collecting disc is arranged at the bottom of the movable base. The training device is simple in structure and convenient to operate, shuttlecocks on the ground are conveniently and automatically collected, the labor intensity of workers is greatly reduced, the collected shuttlecocks are orderly placed, subsequent taking and using are facilitated ...

Valve element mechanism and temperature and pressure reducer

The invention discloses a valve element mechanism and a temperature and pressure reducer, and the valve element mechanism comprises a valve element which is provided with a valve element inner cavity (301), a valve element outer ring groove, a valve element radial communicating channel (302) and a valve element axial communicating channel (303); the valve rod comprises a valve rod connecting end (401) of the valve rod, and the valve rod connecting end (401) is provided with a valve rod communicating channel (402) used for communicating the valve element inner cavity (301) with a rodless cavity (2012) in the other end of the valve element. The valve element mechanism comprises a valve element and a valve rod, the positions of the valve element and the valve rod can be adjusted, a medium in a rod cavity can be decompressed into a valve element inner cavity through a valve element axial communicating channel, and small-flow adjustment of the medium is achieved through the valve element axial ...

High-temperature welan gum fracturing fluid and preparation method thereof

The invention discloses a high-temperature welan gum fracturing fluid, which is prepared from the following raw materials in percentage by weight: 0.2 to 0.4 percent of modified welan gum, 0.05 to 0.2 percent of bactericide, 0.3 to 0.5 percent of demulsification cleanup additive, 0.3 to 0.5 percent of clay stabilizer, 0.1 to 0.3 percent of high-temperature cross-linking agent and the balance of water, wherein the weight ratio of the modified welan gum to the bactericide is 100 percent; the modified welan gum is prepared through an alkalization reaction and an etherification reaction. Meanwhile, the invention further discloses a preparation method of the fracturing fluid. The high-temperature welan gum fracturing fluid provided by the invention solves the problems of poor temperature resistance, high cost and the like of guar gum fracturing fluid in high-temperature reservoir reconstruction.

High temperature by-pass valve

The invention relates to a high-temperature by-pass valve which is suitable for a burning furnace outlet, a normal open inlet pipe and a normal open outlet pipe are arranged on a valve cylinder body, a high-temperature inlet pipe is arranged on the valve cylinder body, a valve plate component which can spasmodically open and close the outlet end of the high-temperature inlet pipe is arranged inside the valve cylinder body, a valve rod is arranged on the valve plate component, a valve cover component is arranged on the valve cylinder body of the top end portion of the valve rod, the valve cover component is equipped with a support component, the support component is internally connected with a lead screw, an elastic anti-dust sleeve is coated outside the lead screw, the bottom end portion of the lead screw is connected to the top end portion of the valve rod, and the support component is equipped with an actuating mechanism for driving the valve rod to lift. The high-temperature by-pass ...

Forced sealing control valve

Drilling and completion leakage processing tool and leakage processing method

The invention relates to the field of oil and gas development, in particular to a drilling and completion leakage treatment tool and method, and the specific process is as follows: (1) after drilling and completion, performing reaming operation on a leakage section through a reaming tool; (2) an oil pipe is put in, a packer is arranged at the bottom of the oil pipe, the packer is put down to the upper portion of the leakage section by 3-5 m, the packer is set, and the leakage section is packed on the lower portion of the packer; (3) replacing the drilling fluid at the lower part of the packer and in the oil pipe; (4) the leakage section well wall is treated through laser, so that the leakage section well wall is ceramized and vitrified; and (5) leaking stoppage and solidification are conducted on the treated well wall of the leakage section, and then the leakage section is drilled through. According to the method, the leakage section well wall is treated through laser, the soft leakage ...

Parallel gate valve

The invention relates to a parallel gate valve comprising a valve body, a valve cover, a valve seat, a valve rod and a valve plate assembly, wherein the valve cover is arranged on the top of the valve body; the upper part of the valve body is provided with an upper cavity, and the lower part of the same is provided with a flow passage; the valve seat is arranged in the flow passage and provided with a valve plate groove matched with the valve plate assembly; the valve plate assembly is arranged in the valve plate groove; the valve rod penetrates through the upper cavity from the valve cover; the valve rod and the valve cover are sealed by utilizing a sealing structure; and the lower end of the valve rod is connected with the upper part of the valve plate assembly. The parallel gate valve is characterized in that the valve plate assembly comprises a left valve plate, a right valve plate, a middle spring, a valve plate sleeve, an upper fixing ring and a lower fixing ring, wherein the left ...

Angle stroke rotation disc cutting valve

The invention relates to an angular travel rotary disc cutting valve, a closed valve chamber is formed between a left valve body and a right valve body via a valve pipe, a rotating shaft is hinged on the left valve body or a right valve body, an inner end of the rotating shaft is inserted in the valve chamber, an outer end of the rotating shaft is fixed with an actuator crank, a valve body crank is fixed on the inner end of the rotating shaft, a left valve core and a right valve core are arranged at the bottom end of the valve body crank, a left valve seat is arranged on the inner wall of the left valve body which is arranged at the inlet of the valve body, a right valve seat is arranged on the inner all of the right valve body which is arranged at the outlet of the valve body, a left valve disc which is engaged with the left valve seat is inserted on the left valve core, the left end portion of the left valve disc is a blade shape edge, an elastic supporting device is arranged between ...

Angle stroke rotation disc cutting valve

The invention relates to an angular travel rotary disc cutting valve, a closed valve chamber is formed between a left valve body and a right valve body via a valve pipe, a rotating shaft is hinged on the left valve body or a right valve body, an inner end of the rotating shaft is inserted in the valve chamber, an outer end of the rotating shaft is fixed with an actuator crank, a valve body crank is fixed on the inner end of the rotating shaft, a left valve core and a right valve core are arranged at the bottom end of the valve body crank, a left valve seat is arranged on the inner wall of the left valve body which is arranged at the inlet of the valve body, a right valve seat is arranged on the inner all of the right valve body which is arranged at the outlet of the valve body, a left valve disc which is engaged with the left valve seat is inserted on the left valve core, the left end portion of the left valve disc is a blade shape edge, an elastic supporting device is arranged between ...

Parallel gate valve

The invention relates to a parallel gate valve comprising a valve body, a valve cover, a valve seat, a valve rod and a valve plate assembly, wherein the valve cover is arranged on the top of the valve body; the upper part of the valve body is provided with an upper cavity, and the lower part of the same is provided with a flow passage; the valve seat is arranged in the flow passage and provided with a valve plate groove matched with the valve plate assembly; the valve plate assembly is arranged in the valve plate groove; the valve rod penetrates through the upper cavity from the valve cover; the valve rod and the valve cover are sealed by utilizing a sealing structure; and the lower end of the valve rod is connected with the upper part of the valve plate assembly. The parallel gate valve is characterized in that the valve plate assembly comprises a left valve plate, a right valve plate, a middle spring, a valve plate sleeve, an upper fixing ring and a lower fixing ring, wherein the left ...

Temperature and pressure reducer

The invention discloses a temperature and pressure reducer which comprises a valve sleeve provided with a valve sleeve inner cavity (201). The valve sleeve is sleeved with the valve body, and a valve body inner cavity (101) communicated with the valve sleeve inner cavity (201) is formed in the valve body; and the bypass pipeline is located outside the valve body and comprises a bypass upper port and a bypass lower port which are communicated with the valve sleeve inner cavity (201) and are arranged at intervals in the axial direction, and a medium of the temperature and pressure reducer can flow through the valve sleeve inner cavity (201) and the valve body inner cavity (101) along the bypass pipeline so as to preheat the valve body and the valve sleeve. A discharge pipeline (810) is arranged on the bypass pipeline and located between the bypass upper port and the bypass lower port, so that impurities in the valve sleeve inner cavity (201) can be discharged along the discharge pipeline ...

High temperature by-pass valve

The invention relates to a high-temperature by-pass valve which is suitable for a burning furnace outlet, a normal open inlet pipe and a normal open outlet pipe are arranged on a valve cylinder body, a high-temperature inlet pipe is arranged on the valve cylinder body, a valve plate component which can spasmodically open and close the outlet end of the high-temperature inlet pipe is arranged inside the valve cylinder body, a valve rod is arranged on the valve plate component, a valve cover component is arranged on the valve cylinder body of the top end portion of the valve rod, the valve cover component is equipped with a support component, the support component is internally connected with a lead screw, an elastic anti-dust sleeve is coated outside the lead screw, the bottom end portion of the lead screw is connected to the top end portion of the valve rod, and the support component is equipped with an actuating mechanism for driving the valve rod to lift. The high-temperature by-pass ...

Auxiliary badminton racket swinging training device

The invention discloses auxiliary badminton racket swing training equipment, which comprises a ball outlet mechanism, a serving mechanism and a supporting mechanism, the ball outlet mechanism comprises a ball outlet table and a ball hitting rod, the serving mechanism comprises a concentric-square-shaped serving frame, the supporting mechanism comprises a supporting rod and a cross, supporting legs are symmetrically arranged at the bottom end of the ball outlet table, and the supporting legs are arranged on the supporting rod. The cross comprises a vertical shaft and a transverse shaft. A grip is arranged at one end of a ball outlet table, the ball outlet table is movably mounted at the top end of a supporting rod through a cross, and the ball outlet table can transversely and longitudinally rotate through the cross so that multi-directional ball serving can be carried out, and more accurate professional training can be carried out on trainees; the badminton storage box is arranged above ...