Pressure test pump

Abstract

The utility model relates to the technical field of water pressure test, and discloses a pressure test pump, which comprises a driving gas circuit, a low-pressure pump and a high-pressure pump, the driving gas circuit is used for externally connecting compressed gas, the compressed gas is used for driving the high-pressure pump and the low-pressure pump, and a water inlet and a water outlet of the high-pressure pump are communicated with a water tank and a detected piece in a sealing manner; the low-pressure pump and the high-pressure pump work simultaneously or independently, and a water inlet and a water outlet of the low-pressure pump are communicated with the water tank and a detected piece in a sealed mode respectively. According to the pressure test pump, the high-pressure pump and the low-pressure pump are combined for use, the characteristics that liquid output by the high-pressure pump is large in pressure and small in flow are utilized, and the characteristics that liquid output by the low-pressure pump is large in flow under the pressure are utilized, so that the problem that an existing pressure test pump is long in time of outputting liquid into a detected piece is solved; and meanwhile, the pressure test effect of the pressure test pump is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of water pressure testing, in particular to a pressure testing pump. Background Art

[0002] The pressure test pump is a testing equipment specially used for various pressure vessels, pipelines, valves, boilers, cylinders, fire-fighting equipment, etc. for water pressure testing and for obtaining high-pressure liquids in laboratories.

[0003] At present, the existing pressure test pump usually includes a high-pressure pump (booster) and a driving air circuit, the driving air circuit is used to output compressed gas as the power of the high-pressure pump (booster), the water inlet of the high-pressure pump is connected to the water tank, and the water outlet of the high-pressure pump is sealed and connected to the tested part (the tested part is a pressure vessel or a pipeline or a boiler, etc.), such as a portable pressure test pump disclosed in a Chinese patent (publication number: CN112595601A), whose working principle is: according to the pressure test requirements of the tested part, the air-driven pressurization principle is adopted to pressurize the test medium inside the tested part from normal pressure to the test pressure, so as to achieve the water pressure test effect of the tested part. However, due to the large compression ratio of the high-pressure pump of the existing pressure test pump, the pressure of the output liquid is large and the flow rate is small, resulting in a long time for the output liquid to the tested part, thereby affecting the water pressure test efficiency of the tested part. Utility Model Content

[0004] One of the purposes of the utility model is to provide a pressure test pump, aiming to solve the problem that the existing pressure test pump takes a long time to output liquid into the tested part, thereby affecting the water pressure test efficiency of the tested part.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a pressure test pump, including a driving air circuit and a high-pressure pump, the driving air circuit is used to output compressed gas, the compressed gas is used to drive the high-pressure pump, the water inlet and the water outlet of the high-pressure pump are connected to a water tank and sealed and connected to the detected part, characterized in that the pressure test pump also includes a low-pressure pump, the compressed gas is also used to drive the low-pressure pump, the low-pressure pump and the high-pressure pump work simultaneously or independently, the water inlet and the water outlet of the low-pressure pump are respectively connected to the water tank and sealed and connected to the detected part; wherein, a first one-way valve is provided on the pipeline connecting the water outlet of the high-pressure pump and the detected part, and the first one-way valve is used to prevent the liquid in the detected part from flowing back to the high-pressure pump; a second one-way valve is provided on the pipeline connecting the water outlet of the low-pressure pump and the detected part, and the second one-way valve is used to prevent the liquid in the detected part from flowing back to the low-pressure pump.

[0006] Furthermore, the driving air circuit includes a main air circuit, a first branch air circuit and a second branch air circuit, one end of the main air circuit is connected to a compressed air source, one end of the first branch air circuit and the second branch air circuit are connected to the other end of the main air circuit, the other end of the main air circuit is connected to a driving air source port of the high-pressure pump, the other end of the second branch air circuit is connected to a driving air source port of the low-pressure pump, the first branch air circuit is provided with a first control valve for controlling the compressed gas to enter the high-pressure pump, and the second branch air circuit is provided with a second control valve for controlling the compressed gas to enter the low-pressure pump.

[0007] Furthermore, the pipeline connecting the water outlet of the high-pressure pump and the detected component is a first pipeline, and the water outlet of the low-pressure pump is connected to the first pipeline.

[0008] Furthermore, a filter is provided on the first pipeline, and the filter is used to filter the liquid entering the high-pressure pump and the low-pressure pump.

[0009] Furthermore, a flow meter is also provided on the first pipeline, and the flow meter is located between the position where the filter and the water inlet of the low-pressure pump are connected to the first pipeline.

[0010] Furthermore, the pipeline connecting the water outlet of the high-pressure pump and the detected component is a second pipeline, and the water outlet of the low-pressure pump is connected to the second pipeline.

[0011] Furthermore, a pressure gauge is provided at a position where the water outlet of the low-pressure pump is connected to the second pipeline.

[0012] Furthermore, the second pipeline is also provided with a pressure sensor located between the pressure gauge and the detected component, and the pressure sensor is electrically connected to a recorder.

[0013] Compared with the prior art, the utility model pressure test pump has the following beneficial effects:

[0014] When the pressure test pump of the utility model is in use, the low-pressure pump is first driven to work by the compressed gas provided by the driving gas circuit, and the liquid is quickly delivered to a preset position in the tested part by utilizing the characteristics of low pressure and large flow rate of the liquid output by the low-pressure pump. At this time, the low-pressure pump is turned off, and the high-pressure pump is driven to work by the compressed gas, and the test medium inside the tested part is pressurized from normal pressure to test pressure by utilizing the characteristics of high pressure and small flow rate of the liquid output by the high-pressure pump, so as to achieve the water pressure test effect of the tested part. In this way, the pressure test pump will not take a long time to output liquid to the tested part, thereby affecting the water pressure test efficiency of the tested part. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the principle structure of the pressure test pump of the utility model.

[0016] Numbers in the attached drawings:

[0017] 1. Driving air circuit; 10. Main air circuit; 11. First branch air circuit; 110. First control valve; 12. Second branch air circuit; 120. Second control valve; 2. High-pressure pump; 20. First pipeline; 201. Filter; 202. Flow meter; 21. Second pipeline; 210. Pressure gauge; 211. Pressure sensor; 212. Recorder; 22. First non-return valve; 3. Low-pressure pump; 30. Second non-return valve; 4. Water tank; 5. Detected part; 6. Pressure relief valve; 7. Drain pipeline. DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] In the description of the present invention, it should be understood that the terms "length", "up", "down", "front", "back", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] Please refer to Figure 1The utility model proposes a pressure test pump, including a driving air circuit 1, a low-pressure pump 3 and a high-pressure pump 2. The driving air circuit 1 is externally connected to compressed gas for outputting compressed gas, and the compressed gas is used to drive the high-pressure pump 2 and the low-pressure pump 3. The water inlet of the high-pressure pump 2 is connected to the water tank 4, and the water outlet of the high-pressure pump 2 is sealed and connected to the detected part 5. The low-pressure pump 3 and the high-pressure pump 2 work simultaneously or independently. The water inlet of the low-pressure pump 3 is connected to the above-mentioned water tank 4, and the water outlet of the low-pressure pump 3 is sealed and connected to the above-mentioned detected part 5. The detected part 5 can be a pressure container or a boiler, etc. Of course, a first one-way valve 22 is provided on the pipeline connecting the water outlet of the high-pressure pump 2 and the detected part 5, and the first one-way valve 22 is used to prevent the liquid in the detected part 5 from flowing back to the high-pressure pump 2; a second one-way valve 30 is provided on the pipeline connecting the water outlet of the low-pressure pump 3 and the detected part 5, and the second one-way valve 30 is used to prevent the liquid in the detected part 5 from flowing back to the low-pressure pump 3.

[0023] When the pressure test pump of the utility model is in use, the low-pressure pump 3 is first driven to work by the compressed gas provided by the driving gas circuit 1, and the low-pressure pump 3 outputs the liquid with a small pressure and a large flow rate to quickly transport the liquid to a preset position in the detected component 5. At the same time, under the action of the first one-way valve, the liquid transported into the detected component 5 will not flow back into the high-pressure pump 2. At this time, the low-pressure pump 3 is closed, and under the action of the second one-way valve, the liquid in the detected component 5 will not return to the low-pressure pump 3. Then, the high-pressure pump 2 is driven to work by compressed gas, and the high-pressure pump 2 outputs the liquid with a large pressure and a small flow rate to increase the test medium in the detected component 5 from normal pressure to the test pressure, so as to achieve the water pressure test effect of the detected component 5. In this way, the pressure test pump will not take a long time to output the liquid to the detected component 5, thereby affecting the water pressure test efficiency of the detected component 5.

[0024] It should be noted that the high-pressure pump 2 and the low-pressure pump 3 can work independently or simultaneously, depending on the situation. That is, under the combined action of the high-pressure pump 2 and the low-pressure pump 3, the liquid can be quickly transported into the test piece 5 without affecting the pressure test effect of the pressure test pump on the test piece 5.

[0025] In one embodiment, the driving gas circuit 1 includes a main gas circuit 10, a first branch gas circuit 11, and a second branch gas circuit 12. One end of the main gas circuit 10 is connected to a compressed gas source. The compressed gas source can come from an air compressor (not shown) or a pipeline for conveying compressed gas, which is not limited here. Of course, one end of the first branch gas circuit 11 and the second branch gas circuit 12 is connected to the other end of the main gas circuit 10, the high-pressure pump 2 is a high-pressure gas-driven liquid pump, and the low-pressure pump 3 is an air-driven liquid pump. The other end of the low-pressure main gas circuit 10 is connected to the driving gas source port of the high-pressure pump 2, and the other end of the second branch gas circuit 12 is connected to the driving gas source port of the low-pressure pump 3. In addition, a first control valve 110 for controlling the compressed gas to enter the high-pressure pump 2 is also provided on the first branch gas circuit 11. The first control valve 110 can control the on-off of the compressed gas entering the high-pressure pump 2, thereby controlling the working state of the high-pressure pump 2; a second control valve 120 for controlling the compressed gas to enter the low-pressure pump 3 is provided on the second branch gas circuit 12. The second control valve 120 can control the on-off of the compressed gas entering the low-pressure pump 3, thereby controlling the working state of the low-pressure pump 3. When the low-pressure pump 3 works independently, the first control valve 110 is in a closed state; when the high-pressure pump 2 works independently, the second control valve 120 is in a closed state; when the low-pressure pump 3 and the high-pressure pump 2 work simultaneously, the first control valve 110 and the second control valve 120 are both in an open state, so that the purpose of the low-pressure pump 3 and the high-pressure pump 2 working simultaneously or independently can be achieved.

[0026] In one embodiment, the pipeline connecting the water outlet of the high-pressure pump 2 and the detected part 5 is the first pipeline 20, and the water outlet of the low-pressure pump 3 is connected to the first pipeline 20, so that a pipeline connecting the low-pressure pump 3 and the water tank 4 can be saved, saving costs. Similarly, the pipeline connecting the water outlet of the high-pressure pump 2 and the detected part 5 is the second pipeline 21, and the water outlet of the low-pressure pump 3 is connected to the second pipeline 21, so that a pipeline connecting the low-pressure pump 3 and the detected part 5 can also be saved, saving costs.

[0027] In one embodiment, a filter 201 is further provided on the first pipeline 20, and the filter 201 is used to filter the liquid entering the high-pressure pump 2 and the low-pressure pump 3. It can be understood that under the filtering effect of the filter 201, the sundries (such as large particles of sundries, leaves, etc.) in the water tank 4 can be prevented from entering the high-pressure pump 2 and the low-pressure pump 3, thereby improving the service life of the high-pressure pump 2 and the low-pressure pump 3.

[0028] In one embodiment, a flow meter 202 is further provided on the first pipeline 20, and the flow meter 202 is used to measure the flow rate of liquid entering the high-pressure pump 2 and / or the low-pressure pump 3, so as to understand in real time the status of liquid delivery into the high-pressure pump 2 and / or the low-pressure pump 3. In addition, the flow meter 202 is located between the position where the filter 201 and the water inlet of the low-pressure pump 3 are connected to the first pipeline 20, so that the debris in the water tank 4 can be prevented from entering the flow meter 202 and causing the blockage of the flow meter 202.

[0029] In one embodiment, a pressure gauge 210 is provided at the position where the water outlet of the low-pressure pump 3 is connected to the second pipeline 21, and the pressure gauge 210 is used to detect the pressure of the liquid output from the low-pressure pump 3, or the pressure of the liquid output from the high-pressure pump 2, or the pressure of the liquid output by the low-pressure pump 3 and the high-pressure pump 2. Of course, a pressure sensor 211 located between the pressure gauge 210 and the detected part 5 is also provided on the second pipeline 21, and the pressure sensor 211 is electrically connected to a recorder 212, so that the pressure collected by the pressure sensor 211 is transmitted to the recorder 212, and the pressure data is displayed by the recorder 212, so that the operator can understand the pressure data of the liquid entering the detected part 5 in real time. The recorder 212 is a paperless recorder.

[0030] In one embodiment, the pipeline connecting the water outlet of the low-pressure pump 3 and the detected part 5 is also connected to a drainage pipeline 7, on which a pressure relief valve 6 is provided, and the output end of the drainage pipeline 7 is connected to the water tank 4 to realize liquid circulation. In other words, it can be understood that when the pressure test pump is performing pressure testing on the detected part 5, the valve of the pressure relief valve 6 is in a closed state, and only when the pressure test is completed, the pressure relief valve 6 is manually opened to discharge the liquid to the water tank 4, so as to realize the recycling of the liquid and avoid wasting water.

[0031] In one embodiment, the pressure test pump of the utility model also includes an explosion-proof lithium battery, which is electrically connected to the flow meter, paperless recorder, and pressure sensor. The explosion-proof lithium battery is used to provide power for the flow meter, paperless recorder, and pressure sensor without the need for an external high-voltage power supply.

[0032] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pressure test pump, comprising a driving air circuit and a high-pressure pump, wherein the driving air circuit is used to output compressed gas, the compressed gas is used to drive the high-pressure pump, the water inlet and the water outlet of the high-pressure pump are connected to a water tank and a sealed connected test piece, characterized in that: The pressure test pump also includes a low-pressure pump, and the compressed gas is also used to drive the low-pressure pump. The low-pressure pump works simultaneously or independently with the high-pressure pump, and the water inlet and outlet of the low-pressure pump are respectively connected to the water tank and sealed to the tested part; wherein a first one-way valve is provided on the pipeline connecting the water outlet of the high-pressure pump and the tested part, and the first one-way valve is used to prevent the liquid in the tested part from flowing back to the high-pressure pump; a second one-way valve is provided on the pipeline connecting the water outlet of the low-pressure pump and the tested part, and the second one-way valve is used to prevent the liquid in the tested part from flowing back to the low-pressure pump.

2. The pressure test pump according to claim 1, characterized in that: The driving gas circuit includes a main gas circuit, a first branch gas circuit and a second branch gas circuit. One end of the main gas circuit is connected to a compressed gas source, one end of the first branch gas circuit and the second branch gas circuit are connected to the other end of the main gas circuit, the other end of the main gas circuit is connected to a driving gas source port of the high-pressure pump, and the other end of the second branch gas circuit is connected to a driving gas source port of the low-pressure pump. A first control valve for controlling the compressed gas to enter the high-pressure pump is provided on the first branch gas circuit, and a second control valve for controlling the compressed gas to enter the low-pressure pump is provided on the second branch gas circuit.

3. The pressure test pump according to claim 1, characterized in that: The pipeline connecting the water outlet of the high-pressure pump and the detected component is the first pipeline, and the water outlet of the low-pressure pump is connected to the first pipeline.

4. The pressure test pump according to claim 3, characterized in that: The first pipeline is also provided with a filter, and the filter is used to filter the liquid entering the high-pressure pump and the low-pressure pump.

5. The pressure test pump according to claim 4, characterized in that: The first pipeline is also provided with a flow meter, and the flow meter is located between the position where the filter and the water inlet of the low-pressure pump are connected to the first pipeline.

6. The pressure test pump according to claim 1, characterized in that: The pipeline connecting the water outlet of the high-pressure pump and the detected component is the second pipeline, and the water outlet of the low-pressure pump is connected to the second pipeline.

7. The pressure test pump according to claim 6, characterized in that: A pressure gauge is provided at a position where the water outlet of the low-pressure pump is connected to the second pipeline.

8. The pressure test pump according to claim 7, characterized in that: The second pipeline is also provided with a pressure sensor located between the pressure gauge and the detected component, and the pressure sensor is electrically connected to a recorder.

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