A pressure test device and method

Abstract

The application discloses a pressure test device, which comprises a water tank, a test pump and a pressure regulator. The water tank is capable of containing test water. The inlet of the test pump is communicated with the water tank. The outlet of the test pump is communicated with a drilling hole. The pressure regulator is connected with a water drain pipeline. The water inlet of the water drain pipeline is communicated with the outlet of the test pump by the pressure regulator. The pressure regulator is capable of adjusting the water inflow of the water drain pipeline. The water outlet of the water drain pipeline is communicated with the water tank. The application also provides a pressure test method. The pressure of the pressure injection water is adjusted by the pressure regulator by using the pressure test device. After the pressure of the pressure injection water and the test time reach the test requirements, the test pump is closed, the water supply of the water tank is stopped, and the pressure is released by the pressure regulator and the water drain pipeline. The high-pressure water discharged from the outlet of the test pump is shunted by the pressure regulator and the water drain pipeline, so that the pressure stability in the pressure test is ensured, and the operation convenience of the pressure test is improved.

Description

Technical Field

[0001] This invention relates to the technical field of drilling equipment and its peripheral facilities, and in particular to a pressure resistance testing device and method. Background Technology

[0002] Surface drilling, underground pressurized water drilling, tunnel pre-drilling, and geological disaster drilling all require casing installation. After grouting behind the borehole wall, the first step is to inspect the casing consolidation and check for any abnormalities such as water leakage, bulging, or deformation in the surrounding rock. This necessitates a borehole pressure test after the casing is installed and grouted, when the borehole is swept to 0.5-1.0m below the bottom of the casing placement position. The success of the pressure test directly affects the engineering quality of the borehole, its service life, and whether subsequent drilling operations can be organized normally. This is the main reason why the pressure test accounts for more than 0.5% of the drilling process weight in the construction of pressurized water drilling in mines and pressurized grouting boreholes in tunnels.

[0003] The normal construction procedure for the pressure test after casing wall placement and grouting is as follows: After connecting the grouting device at the borehole opening with a mud pump, the mud pump is started and stopped by using a mud pump clutch or switch to control the pressure test pressure and check whether the pressure bearing effect meets the engineering drilling design pressure bearing standard.

[0004] Controlling pressure changes using switches or mud pump clutches is difficult, resulting in fluctuating pressure that cannot be maintained stably. This prevents the test from reaching the designed or required duration, and the inability to maintain constant pressure easily damages equipment. Furthermore, existing testing procedures pose safety hazards. Because pressure cannot be constantly controlled, especially during sudden high-pressure surges exceeding the pressure tolerance of the orifice device, mud pump outlet, and pump head seals, jetting accidents can easily occur, causing damage to equipment and materials, or even endangering personal safety. Additionally, this operating procedure cannot achieve a constant pressure at the design value, failing to effectively verify the pressure-bearing capacity of the borehole casing. Moreover, it demands highly skilled operators; while it generally meets safety and pressure test requirements, inexperienced personnel are prone to misoperation, failing to meet design pressure requirements and creating potential sources of substandard borehole quality. In addition, due to the difficulty in performing the pressure test and the significant safety risks, many people have not conducted this pressure test. As a result, when the water control valve is closed or the borehole grouting is carried out after the overall drilling construction is completed, the bottom plate around the borehole opening bulges and leaks water, the water control valve bulges out and loses its water control function, and there are often personnel working around it, which poses a major safety hazard.

[0005] Therefore, how to change the current situation where the pressure resistance test of pressure-bearing borehole construction is difficult to operate and poses safety hazards has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a pressure testing device and method to solve the problems existing in the prior art, improve the convenience of pressure testing operation, and provide a guarantee for smooth subsequent construction.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a pressure resistance testing device, comprising:

[0008] A water tank, which is capable of holding the test water;

[0009] A test pump, wherein the inlet of the test pump is connected to the water tank and the outlet of the test pump is connected to the borehole opening;

[0010] A pressure regulator is provided, which is connected to a drain pipe. The inlet of the drain pipe is connected to the outlet of the test pump via the pressure regulator. The pressure regulator can adjust the inflow rate of the drain pipe. The outlet of the drain pipe is connected to the water tank.

[0011] Preferably, the borehole opening is provided with a pressure-resistant connector, and the outlet of the test pump is connected to the pressure-resistant connector.

[0012] Preferably, a high-pressure gate valve is also provided at the borehole opening, and the pressure-resistant connector is connected to the outlet of the test pump via the high-pressure gate valve.

[0013] Preferably, the inlet of the test pump is connected to the water tank via a first connecting pipe, and the outlet of the test pump is connected to the borehole via a second connecting pipe. The first connecting pipe, the second connecting pipe, and the drain pipe are all made of high-pressure rubber hoses.

[0014] Preferably, the first connecting pipe, the second connecting pipe, and the drain pipe are all detachably connected to the test pump.

[0015] Preferably, the test pump is connected to a shock-resistant pressure gauge.

[0016] Preferably, the pressure regulator includes an adjusting body and an adjusting rod, the adjusting rod being threadedly connected to the adjusting body, the adjusting body having a communicating channel, the inlet of the drain pipe being connected to the outlet of the test pump via the communicating channel, and one end of the adjusting rod being able to extend into the communicating channel.

[0017] Preferably, the pressure regulator includes an adjusting body and an adjusting rod, the adjusting rod being threadedly connected to the adjusting body, the adjusting body having a communicating channel, the inlet of the drain pipe being connected to the outlet of the test pump via the communicating channel, one end of the adjusting rod extending into the communicating channel, and a baffle plate being connected to the end of the adjusting rod extending into the communicating channel.

[0018] The present invention also provides a pressure resistance test method, which utilizes the above-mentioned pressure resistance test apparatus and includes the following steps:

[0019] Start the test pump to inject water into the borehole. Use the pressure regulator to adjust the water pressure. Water discharged from the outlet of the test pump flows back to the water tank through the drain pipe. After the water pressure and test time meet the test requirements, turn off the test pump, stop the water supply to the water tank, and release the pressure using the pressure regulator and the drain pipe.

[0020] The present invention achieves the following technical effects compared with the prior art: The pressure resistance test device of the present invention includes a water tank, a test pump and a pressure regulator. The water tank can hold test water. The inlet of the test pump is connected to the water tank and the outlet of the test pump is connected to the borehole. The pressure regulator is connected to a drain pipe. The inlet of the drain pipe is connected to the outlet of the test pump through the pressure regulator. The pressure regulator can adjust the water inflow of the drain pipe. The outlet of the drain pipe is connected to the water tank.

[0021] The present invention also provides a pressure resistance test method. Using the above-mentioned pressure resistance test device, the test pump is started to inject water into the borehole opening. The pressure of the injected water is adjusted by the pressure regulator. The water discharged from the outlet of the test pump flows back to the water tank through the drain pipe. After the injection water pressure and test time meet the test requirements, the test pump is turned off, the water supply to the water tank is stopped, and the pressure is released by the pressure regulator and the drain pipe.

[0022] The pressure resistance test device and method of the present invention utilizes the high-pressure water discharged from the outlet of the test pump through a pressure regulator and a drain pipe to adjust the inlet water pressure at the borehole opening, thereby ensuring pressure stability during the pressure resistance test, improving the ease of operation of the pressure resistance test, and providing a guarantee for smooth subsequent construction. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the pressure resistance testing device of the present invention;

[0025] Figure 2 This is a schematic diagram of the pressure regulator of the pressure resistance testing device of the present invention;

[0026] Figure 3 This is a schematic diagram of the pressure regulator in an embodiment of the pressure resistance testing device of the present invention.

[0027] Among them, 1 is the water tank, 2 is the test pump, 3 is the pressure regulator, 4 is the borehole opening, 5 is the drain pipe, 6 is the pressure-resistant connector, 7 is the high-pressure gate valve, 8 is the first connecting pipe, 9 is the second connecting pipe, and 10 is the shock-resistant pressure gauge. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The purpose of this invention is to provide a pressure testing device and method to solve the problems existing in the prior art, improve the convenience of pressure testing operation, and provide a guarantee for smooth subsequent construction.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Please refer to Figure 1-3 ,in, Figure 1 This is a schematic diagram of the pressure resistance testing device of the present invention. Figure 2 This is a schematic diagram of the pressure regulator of the pressure resistance testing device of the present invention. Figure 3 This is a schematic diagram of the pressure regulator in an embodiment of the pressure resistance testing device of the present invention.

[0032] This invention provides a pressure resistance testing device, including a water tank 1, a test pump 2, and a pressure regulator 3. The water tank 1 can hold test water. The inlet of the test pump 2 is connected to the water tank 1, and the outlet of the test pump 2 is connected to the borehole 4. The pressure regulator 3 is connected to a drain pipe 5. The inlet of the drain pipe 5 is connected to the outlet of the test pump 2 via the pressure regulator 3. The pressure regulator 3 can adjust the water flow rate of the drain pipe 5. The outlet of the drain pipe 5 is connected to the water tank 1.

[0033] During the test, test pump 2 is started to inject water into the borehole opening 4. The pressure of the injected water is adjusted using pressure regulator 3. The water discharged from the outlet of test pump 2 flows back to water tank 1 through drain pipe 5. After the injection pressure and test time meet the test requirements, test pump 2 is turned off, and then the water supply to water tank 1 is stopped. Pressure is released using pressure regulator 3 and drain pipe 5. This invention utilizes pressure regulator 3 and drain pipe 5 to divert the high-pressure water discharged from the outlet of test pump 2, thereby adjusting the inlet pressure of borehole opening 4, ensuring pressure stability during the pressure resistance test, improving the ease of operation of the pressure resistance test, and providing a guarantee for smooth subsequent construction. It should be noted that "high-pressure water" refers to water with a certain pressure that meets the requirements of the pressure resistance test, and does not specifically refer to water within a certain pressure range.

[0034] The borehole opening 4 is equipped with a pressure-resistant connector 6, and the outlet of the test pump 2 is connected to the pressure-resistant connector 6. The pressure-resistant connector 6 facilitates the connection between the borehole opening 4 and the test pump 2, ensuring the smooth injection of high-pressure water during the test.

[0035] Meanwhile, a high-pressure gate valve 7 is also installed at the borehole opening 4. The pressure-resistant connector 6 is connected to the outlet of the test pump 2 via the high-pressure gate valve 7. The installation of the high-pressure gate valve 7 further facilitates control and improves the controllability of the device.

[0036] Specifically, the inlet of the test pump 2 is connected to the water tank 1 via the first connecting pipe 8, and the outlet of the test pump 2 is connected to the borehole 4 via the second connecting pipe 9. The first connecting pipe 8, the second connecting pipe 9, and the drain pipe 5 are all made of high-pressure hoses. The specifications and pressure-bearing capacity of the high-pressure hoses can be selected according to the specific test requirements.

[0037] To improve the ease of transporting the device, the first connecting pipe 8, the second connecting pipe 9, and the drain pipe 5 are all detachably connected to the test pump 2, which facilitates disassembly and assembly and makes it easy to change the test object for pressure testing.

[0038] It should also be noted that the test pump 2 is connected to a shock-resistant pressure gauge 10, which facilitates the detection of the outlet water pressure of the test pump 2 and improves the convenience of test pressure detection.

[0039] In this specific embodiment, the pressure regulator 3 includes an adjusting body and an adjusting rod. The adjusting rod is threadedly connected to the adjusting body. The adjusting body has a connecting channel. The inlet of the drain pipe 5 is connected to the outlet of the test pump 2 via the connecting channel. One end of the adjusting rod can extend into the connecting channel. When the adjusting rod extends into the connecting channel, it will block the connecting channel, change the cross-sectional area through which the water flows in the connecting channel, and adjust the degree of extension of the adjusting rod to adjust the draining capacity of the drain pipe 5, thereby achieving the purpose of adjusting the outlet pressure of the test pump 2.

[0040] In other specific embodiments of the present invention, the pressure regulator 3 includes an adjusting body and an adjusting rod. The adjusting rod is threadedly connected to the adjusting body. The adjusting body has a connecting channel. The inlet of the drain pipe 5 is connected to the outlet of the test pump 2 via the connecting channel. One end of the adjusting rod extends into the connecting channel, and a baffle is connected to the end of the adjusting rod that extends into the connecting channel. Multiple baffles are provided. Under the impact of water flow, the baffles block the connecting channel. By adjusting the adjusting rod, the number of working baffles can be changed, which can also play the role of adjusting the draining capacity of the drain pipe 5, thereby adjusting the outlet pressure of the test pump 2.

[0041] Furthermore, the present invention also provides a pressure resistance test method, utilizing the above-mentioned pressure resistance test apparatus, comprising the following steps:

[0042] Start the test pump 2 to inject water into the borehole opening 4. Use the pressure regulator 3 to adjust the pressure of the injected water. The water discharged from the outlet of the test pump 2 flows back to the water tank 1 through the drain pipe 5. After the injection pressure and test time meet the test requirements, turn off the test pump 2, stop the water supply to the water tank 1, and use the pressure regulator 3 and the drain pipe 5 to release the pressure.

[0043] The pressure resistance test method of the present invention utilizes the high-pressure water discharged from the outlet of the test pump 2 via the pressure regulator 3 and the drain pipe 5 to adjust the inlet water pressure of the borehole opening 4, thereby ensuring pressure stability during the pressure resistance test, improving the ease of operation of the pressure resistance test, and providing a guarantee for smooth subsequent construction.

[0044] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A pressure resistance testing device, characterized in that, include: A water tank, which is capable of holding the test water; A test pump, wherein the inlet of the test pump is connected to the water tank and the outlet of the test pump is connected to the borehole opening; A pressure regulator is connected to a drain pipe. The inlet of the drain pipe is connected to the outlet of the test pump via the pressure regulator. The pressure regulator can adjust the inlet flow of the drain pipe. The outlet of the drain pipe is connected to the water tank. The borehole opening is equipped with a pressure-resistant connector, and the outlet of the test pump is connected to the pressure-resistant connector. The pressure regulator includes an adjustment body and an adjustment rod. The adjustment rod is threadedly connected to the adjustment body. The adjustment body has a connecting channel. The inlet of the drain pipe is connected to the outlet of the test pump through the connecting channel. One end of the adjustment rod can extend into the connecting channel. Alternatively, the pressure regulator includes an adjusting body and an adjusting rod, the adjusting rod being threadedly connected to the adjusting body, the adjusting body having a communicating channel, the inlet of the drain pipe being connected to the outlet of the test pump via the communicating channel, one end of the adjusting rod extending into the communicating channel, and a baffle plate being connected to the end of the adjusting rod extending into the communicating channel.

2. The pressure resistance testing apparatus according to claim 1, characterized in that: The borehole opening is also equipped with a high-pressure gate valve, and the pressure-resistant connector is connected to the outlet of the test pump via the high-pressure gate valve.

3. The pressure resistance testing apparatus according to claim 1, characterized in that: The inlet of the test pump is connected to the water tank via a first connecting pipe, and the outlet of the test pump is connected to the borehole via a second connecting pipe. The first connecting pipe, the second connecting pipe, and the drain pipe are all made of high-pressure rubber hoses.

4. The pressure resistance testing apparatus according to claim 3, characterized in that: The first connecting pipe, the second connecting pipe, and the drain pipe are all detachably connected to the test pump.

5. The pressure resistance testing apparatus according to claim 1, characterized in that: The test pump is connected to a shock-resistant pressure gauge.

6. A pressure resistance test method, utilizing the pressure resistance test apparatus according to any one of claims 1-5, characterized in that, Includes the following steps: Start the test pump to inject water into the borehole. Use the pressure regulator to adjust the water pressure. Water discharged from the outlet of the test pump flows back to the water tank through the drain pipe. After the water pressure and test time meet the test requirements, turn off the test pump, stop the water supply to the water tank, and release the pressure using the pressure regulator and the drain pipe.

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