A water pressure testing device

Abstract

The utility model relates to the technical field of hydraulic test equipment discloses a kind of hydraulic test devices, including pressure test pump body, water pump body, water tank body and matched tee, the pressure test pump body and water pump body are arranged above water tank body, the pressure test pump body is provided with pressure test pump water outlet, the pressure test pump water outlet is arranged in the booster water injection hole of matched tee setting, the water pump body is provided with water pump water outlet, the water pump water outlet is connected in the water inlet of water tank body, the water tank body is provided with water tank water outlet, the water tank water outlet is arranged in the pressureless water injection hole of matched tee setting. In the utility model, by the cooperation between pressure test pump body, water pump body, water tank body, water pump water outlet, matched tee, exhaust valve, valve at the front end of pressureless water injection hole, valve at the front end of booster water injection hole and water tank drain valve, air in test pipeline is effectively discharged, and air compression is avoided to cause interference to test pressure.

Description

Technical Field

[0001] This utility model relates to the technical field of water pressure testing equipment, and in particular to a water pressure testing device. Background Technology

[0002] According to GB50268—2008 "Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering" (hereinafter referred to as the "Code"), water should be slowly injected into the pipeline from the downstream side during the water pressure test to expel air from the pipeline. For pipes with larger diameters and longer distances, if water is injected from the downstream side during the water pressure test, a booster pump must be used to overcome the significant head difference between the upstream and downstream ends of the test pipeline. Furthermore, the flow rate is often small, resulting in prolonged water injection and reduced efficiency of the water pressure test. Therefore, a device that is easy to operate, low in cost, highly efficient, and ensures the safety of the water pressure test is needed.

[0003] A hydrostatic testing device is a specialized device used to test the sealing performance and strength of pipes, containers, or equipment when subjected to internal pressure. In previous technologies, small-flow water pumps were often used, which resulted in a long time consumption during the initial water injection stage, especially when dealing with large-diameter and long-distance pipes. Furthermore, incomplete venting was common, which left residual air and affected the test results. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a water pressure testing device, which aims to improve the problems of slow water injection and slow pressure increase during the water pressure test.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A water pressure testing device includes a test pump body, a water pump body, a water tank body, and a matching tee. The test pump body and the water pump body are positioned above the water tank body. The test pump body is connected to a matching motor. The test pump body has a test pump outlet, which is located at a pressure-boosting water injection hole provided by the matching tee. The water pump body has a water pump outlet, which is connected to the water inlet of the water tank body. The water tank body has a water tank outlet, which is located at a pressure-free water injection hole provided by the matching tee. The inner wall of the pressure-free water injection hole is provided with an air vent valve and a pressure gauge body.

[0007] Preferably, the test pump body includes a test pump pressure gauge, a pressure relief valve, an inlet pipe, an outlet pipe, a water outlet, a return pipe, a motor, and a cylinder. The inlet pipe is connected to one end of the cylinder, the other end of the cylinder is connected to the outlet pipe, and the outlet pipe is connected to the test pump pressure gauge.

[0008] Preferably, the outlet pipe and the pressure gauge of the test pump are positioned below the pressure relief valve, the pressure gauge of the test pump is positioned directly in front of the outlet of the test pump, and the pressure gauge of the test pump is positioned behind the return pipe.

[0009] Preferably, the water tank outlet is located on one side of the test pump body, and the water tank body is provided with a water tank inlet and a water tank drain valve on the side of the water tank body closest to the pump body.

[0010] Preferably, the matching tee is a positive tee, the pressure injection port is equipped with a valve at the front end of the pressure injection port, and the unpressurized injection port is equipped with a valve at the front end of the unpressurized injection port.

[0011] Preferably, the pressure-boosting water injection hole and the valve at the front end of the pressure-boosting water injection hole are located in the upstream direction, and the pressure-free water injection hole, the valve at the front end of the pressure-free water injection hole, the vent valve and the pressure gauge body are located at the tee port and face upward.

[0012] This utility model has the following beneficial effects:

[0013] 1. In this utility model, through the cooperation between the test pump body, water pump body, water tank body, water pump outlet, matching tee, air vent valve, valve at the front end of the pressureless water injection hole, valve at the front end of the pressure-boosting water injection hole, and water tank drain valve, the pipeline is ensured to be full of water, effectively expelling air from the test pipeline and avoiding interference from air compression on the test pressure. At the same time, the water pump body and test pump body are used in stages, first quickly injecting water and then steadily increasing the pressure, thereby improving the water injection efficiency and ensuring stable pressure increase. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a water pressure testing device proposed in this utility model.

[0015] Legend:

[0016] 1. Test pump body; 2. Pump body; 3. Water tank body; 4. Pump outlet; 5. Outlet pipe; 6. Inlet pipe; 7. Test pump pressure gauge; 8. Test pump outlet; 9. Pressure relief valve; 10. Matching tee; 11. Air vent valve; 12. Valve at the front end of the pressureless water injection hole; 13. Pressure gauge body; 14. Valve at the front end of the pressure boosting water injection hole; 15. Water tank drain valve; 16. Water tank outlet. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figure 1 The present invention provides an embodiment of a water pressure testing device, comprising a test pump body 1, a water pump body 2, a water tank body 3, and a matching tee 10. The test pump body 1 and the water pump body 2 are disposed above the water tank body 3. The test pump body 1 is connected to a matching motor. The test pump body 1 is provided with a test pump outlet 8, which is disposed in the pressure-boosting water injection hole provided in the matching tee 10. The water pump body 2 is provided with a water pump outlet 4, which is connected to the water inlet of the water tank body 3. The water tank body 3 is provided with a water tank outlet 16, which is disposed in the pressureless water injection hole provided in the matching tee 10. The inner wall of the pressureless water injection hole is provided with an air vent valve 11 and a pressure gauge body 13.

[0019] Specifically, the device processes the water supply pipelines of urban water plants. The pressure test pump body 1 is driven by a matching motor and provides a high-pressure water source to handle the pressurization process of the test water. The pressure test pump outlet 8 is connected to the pressurization water injection hole of the matching tee 10 through a pipeline to send the pressurized water into the pipeline. The tee realizes the direction control of the water flow. The water pump body 2 is used for the initial water injection stage to quickly inject the test water into the water tank body 3. The test water flows to the pipeline under test through the water tank outlet 16. The valve 12 at the front end of the pressureless water injection hole controls the pressureless water injection. The air valve 11 removes the air mixed into the pipeline during the water injection process. The pressure gauge body 13 is used to monitor the internal pressure of the pipeline.

[0020] Reference Figure 1 The test pump body 1 includes a test pump pressure gauge 7, a pressure relief valve 9, an inlet pipe 6, an outlet pipe 5, a water outlet, a return pipe, a motor, and a cylinder. The inlet pipe 6 is connected to one end of the cylinder, and the other end of the cylinder is connected to the outlet pipe 5. The outlet pipe 5 is connected to the test pump pressure gauge 7. The outlet pipe 5 and the test pump pressure gauge 7 are positioned below the pressure relief valve 9, directly in front of the test pump pressure gauge 7 and directly behind the test pump outlet 8, and behind the test pump pressure gauge 7 and in front of the return pipe.

[0021] Specifically, the test pump body 1 consists of a test pump pressure gauge 7, a pressure relief valve 9, an inlet pipe 6, an outlet pipe 5, a water outlet, a return pipe, a motor, and a cylinder. The connection between the cylinder and the inlet pipe 6 and outlet pipe 5 enables the basic process of drawing water from a water source, pressurizing it, and then sending it out, ensuring unidirectional water flow. The test pump pressure gauge 7 allows for real-time monitoring of water pressure changes during the pressurization process, ensuring the set test pressure is reached. The outlet pipe 5 and the test pump pressure gauge 7 are located above the pressure relief valve 9, facilitating natural water flow during pressure relief and rapid release of system pressure. The test pump pressure gauge 7 and the test pump outlet 8 are aligned on the same axis, allowing operators at the rear to easily observe the test pump pressure gauge 7 and monitor the test status.

[0022] Reference Figure 1 The water tank outlet 16 is located on one side of the test pump body 1. The water tank body 3 is located on the side of the pump body 2 with a water tank inlet and a water tank drain valve 15. The matching tee 10 is a positive tee. The pressure injection hole is equipped with a valve 14 at the front end of the pressure injection hole, and the pressureless injection hole is equipped with a valve 12 at the front end of the pressureless injection hole. The pressure injection hole and the valve 14 at the front end of the pressure injection hole are located in the upstream direction. The pressureless injection hole, the valve 12 at the front end of the pressureless injection hole, the air vent valve 11, and the pressure gauge body 13 are located at the tee branch and face upward.

[0023] Specifically, the diameter of the water tank outlet 16 is set to 50 cm to ensure sufficient water flow during the initial water injection stage. The diameter of the water tank drain valve 15 is set to 10 cm to facilitate rapid drainage of the water tank body 3 after the test. The diameter of the pressureless water injection hole is set to 50 cm, and the diameter of the valve 12 at the front end of the pressureless water injection hole is also set to 50 cm. The valve 12 is connected to the water tank outlet 16 through a pipe of the same size to ensure the continuity and stability of the water flow during the injection into the test pipeline. Taking advantage of the buoyancy of gas in liquid, the upward-facing tee branch can collect residual air in the pipeline and discharge it in time through the exhaust valve 11 located at the top. At the same time, the pressure gauge body 13 is installed facing upward for easy observation and reading. The pressureless water injection path is arranged on the branch to keep the main channel unobstructed, while the branch is used for initial water injection and exhaust.

[0024] Working principle: When using this device to conduct a water pressure test, first run the water pump body 2 and open the valve 12 at the front end of the pressureless water injection hole and the air vent valve 11 on the matching tee 10. The test water enters the water tank body 3 through the water pump outlet 4, then flows out through the water tank outlet 16 and enters the test pipeline through the pressureless water injection hole until the pressureless water injection hole can no longer inject water. Then, close the water pump body 2 and close the valve 12 at the front end of the pressureless water injection hole. Then start the test pump body 1 and open the valve 14 at the front end of the pressure boosting water injection hole. First, check whether the air content in the pipeline meets the requirements. After the inspection is qualified, close the air vent valve 11 on the matching tee 10. Conduct the water pressure test according to the pressure boosting process. After the pressure rises to the test pressure, shut down the test pump body 1 and close the valve 14 at the front end of the pressure boosting water injection hole. Finally, after the test is completed, open the air vent valve 11 on the matching tee 10 and the water tank drain valve 15. The depressurization of the pipeline should be carried out slowly.

[0025] To check if the air content in the pipeline meets the requirements, if the gas is not completely removed, the following will occur: After the pipeline is filled with water, when the pressure is increased, the test pump body 1 continuously fills the pipeline with water, but the pressure rises slowly; when the test pump body 1 fills the pipeline with water, the gauge needle swings significantly and the reading is unstable as the pressure pump shakes up and down; when the water pressure reaches 80% of the test pressure, the pressure increase is stopped, and then the valve connecting the pipeline is opened. When the water is released, there is a "puffing" sound in the water column, and many bubbles are ejected; only after the above three phenomena are eliminated can the water pressure test be carried out formally. At the main pipeline, a temporary automatic air vent valve is installed using the original design 11. During the water pressure test, the residual air in the pipeline can be smoothly removed. This device improves the water injection efficiency and ensures stable pressure rise during use.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water pressure testing device, comprising a test pump body (1), a water pump body (2), a water tank body (3), and a matching tee (10), characterized in that: The test pump body (1) and the water pump body (2) are located above the water tank body (3). The test pump body (1) is connected to the matching motor. The test pump body (1) is provided with a test pump outlet (8). The test pump outlet (8) is located at the pressure-boosting water injection hole provided by the matching tee (10). The water pump body (2) is provided with a water pump outlet (4). The water pump outlet (4) is connected to the water inlet of the water tank body (3). The water tank body (3) is provided with a water tank outlet (16). The water tank outlet (16) is located at the pressureless water injection hole provided by the matching tee (10). The inner wall of the pressureless water injection hole is provided with an air vent valve (11) and a pressure gauge body (13).

2. The hydrostatic testing device according to claim 1, characterized in that: The test pump body (1) includes a test pump pressure gauge (7), a pressure relief valve (9), an inlet pipe (6), an outlet pipe (5), a water outlet, a return pipe, a motor, and a cylinder. The inlet pipe (6) is connected to one end of the cylinder, and the other end of the cylinder is connected to the outlet pipe (5). The outlet pipe (5) is connected to the test pump pressure gauge (7).

3. The hydrostatic testing device according to claim 2, characterized in that: The outlet pipe (5) and the pressure gauge (7) of the test pump are located below the pressure relief valve (9), the pressure gauge (7) of the test pump is located directly in front of the outlet (8) of the test pump, and the pressure gauge (7) of the test pump is located behind the return pipe.

4. The hydrostatic testing device according to claim 1, characterized in that: The water tank outlet (16) is located on one side of the test pump body (1), and the water tank body (3) is provided with a water tank inlet and a water tank drain valve (15) on the side near the water pump body (2).

5. The hydrostatic testing device according to claim 1, characterized in that: The matching tee (10) is set as a positive tee, the pressure injection hole is equipped with a valve (14) at the front end of the pressure injection hole, and the pressureless injection hole is equipped with a valve (12) at the front end of the pressureless injection hole.

6. The hydrostatic testing device according to claim 1, characterized in that: The pressure-boosting water injection hole and the valve (14) at the front end of the pressure-boosting water injection hole are located in the upstream direction. The pressureless water injection hole, the valve (12) at the front end of the pressureless water injection hole, the exhaust valve (11) and the pressure gauge body (13) are located at the three-way branch and face upward.

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