Telescopic overflow type constant pressure test water supply device
The invention provides a telescopic overflow type constant pressure test water supply device which comprises an organic glass cylinder, a water inlet pipe, a water outlet pipe, a telescopic overflow pipe, a guide pipe, a balancing weight and a lifting unit. The water inlet pipe and the water outlet pipe are communicated with the organic glass cylinder, the telescopic overflow pipe is arranged in the organic glass cylinder, the guide pipe is arranged outside the telescopic overflow pipe in a sleeving mode and is permeable, the balancing weight is connected with the telescopic overflow pipe, and the lifting unit is connected with the balancing weight. The telescopic overflow pipe is composed of multiple layers of nested stainless steel pipes. An overflow opening is formed in the joint of the balancing weight and the outmost stainless steel pipe. An overflow outlet is formed in the bottom of the telescopic overflow pipe. The telescopic overflow type constant pressure test water supply device is small in occupied area and convenient to install, multiple water supply devices can be arranged in a test room at the same time so that multiple sets of tests can be carried out at the same time, and work efficiency is greatly improved. Water supply for constant pressure tests is not influenced by power failures, the water supply flow and the water pressure can be adjusted at will, high-pressure and mass-flow constant pressure water supply is achieved, the test reliability is greatly improved, the stability precision of water pressure is lower than 1 mm, and the test precision is improved. 1. A telescopic overflow constant pressure test water supply device, characterized in that includes the organic glass tube (1), with an organic glass tube (1) communicated with the water inlet pipe (4) and a water outlet pipe (6), arranged on the organic glass tube (1) in the extension of the overflow pipe (3), is sleeved on the extension of the overflow pipe (3) of the outer water-permeable guide tube (2), with the telescopic overflow pipe (3) is connected with the counterweight block (9), and a balancing weight (9) is connected with the lifting unit, the telescopic overflow pipe (3) by a multi-layer nested stainless steel tubes, the counterweight block (9) and is connected with the most outer layer of the stainless steel tube, the counterweight block (9) with the most outer layer of the stainless steel tube is provided with an overflow outlet (18), the expansion of the overflow pipe (3) is arranged at the bottom of an overflow outlet (8), the lifting unit through a lifting balance weight block (9) of the telescopic overflow pipe can be (3) multi-layer nested in lifting or compressing of the stainless steel tube. 2. Telescopic overflow constant pressure test water supply device according to Claim 1, characterized in that the expansion of the overflow pipe (3) when in the completely stretched and the height of the organic glass tube (1) of the same height. 3. Telescopic overflow constant pressure test water supply device according to Claim 1, characterized in that the expansion of the overflow pipe (3) of the stainless steel pipe joint of each layer in the O-shaped sealing ring (19) sealing, snap ring is stainless steel tube end (20). 4. Telescopic overflow constant pressure test water supply device according to Claim 1, characterized in that the guide tube (2) adopts a diameter than the extension of the overflow pipe (3) is slightly bigger than that of the diameter of the full compression of the PVC pipe, the guide pipe (2) more than the ground tube is water permeable, under the ground is a water-proof solid tube. 5. Telescopic overflow constant pressure test water supply device according to Claim 1, characterized in that the lifting unit comprises a pulley (12), the steel wire (13) and plate (14), a windlass (14) and the steel cable (13) is connected with one end of the, wire rope (13) around the pulley at the other end (12) and the counterweight block (9) connection. 6. Telescopic overflow constant pressure test water supply device according to Claim 1, characterized in that a water inlet pipe (4) is provided with an inlet valve (5), a water outlet pipe (6) is provided with a water outlet valve (7).