Instrument pipeline online pressure tapping tool

Abstract

The utility model provides a kind of instrument pipeline online pressurizing dredging tool, it is related to instrument pipeline online pressurizing, dredging field, including water tank, manual pressure test pump, the test tube of the water outlet fixed connection of manual pressure test pump, sleeve ball valve III is sequentially arranged on test tube, pressure gauge II connected with three-way II, three-way I connected with pressure guide pipe, sleeve ball valve I, discharge port, sleeve ball valve II is equipped on pressure guide pipe;Beneficial effect: since sleeve connector connects pressure guide pipe and instrument pipeline interface, therefore it has higher strength and guarantees safety.Open sleeve ball valve III, close sleeve ball valve I, sleeve ball valve II, slowly pressurize and observe pressure gauge II, pressure gauge I indication value check system pipeline whether there is leakage by manual operation manual pressure test pump.Open sleeve ball valve II, observe whether pressure gauge II, pressure gauge I has value: if the value is consistent with instrument pipeline pressure, judge pipeline unobstructed, otherwise pressurize dredging.This tool is simple to operate and does not need to be repeatedly disassembled.

Description

Technical Field

[0001] This utility model relates to the field of online pressure testing and unblocking of instrument pipelines, and in particular provides a tooling for online pressure testing and unblocking of instrument pipelines. Background Technology

[0002] Petrochemical companies typically shut down for online maintenance every few years, which involves inspection and repair without disassembly. This includes instrument pipelines, which are designed with a small diameter. Online pressure testing verifies the sealing performance of the instrument pipelines, ensuring that the airtightness of the pipelines and equipment meets relevant national standards. During the pressure testing process, leaks are also checked at various points in the pipelines and addressed immediately. Damaged or malfunctioning instruments are repaired to restore their normal measurement and control functions, ensuring the stable operation of the entire system.

[0003] Typically, the pressure test procedure includes the following three steps:

[0004] 1. Slowly increase pressure

[0005] The pressure is gradually increased to the test pressure (usually 1.5 times the design pressure), and the pressure is stabilized for 10-15 minutes at each stage, while checking for leaks.

[0006] 2. Tightness check

[0007] Hold the pressure for 30 minutes, ensuring the pressure drop does not exceed the allowable range (generally ≤0.05MPa). Simultaneously observe for leaks at pipe joints, valves, and other locations.

[0008] 3. Pressure relief and recording

[0009] After the test is passed, slowly release the pressure, remove the temporary seal, restore the pipeline to its original state, and record the test data (pressure, time, leakage status).

[0010] Currently, the portable pressure testing and unblocking connection components used in the industry only use a single flexible conduit for connection. This means that the manual pressure testing pump is directly connected to the instrument pipeline via a single flexible conduit. Problems with this process include:

[0011] 1. The connection is simple, relying solely on the direct connection between the hose and the instrument pipeline interface. This results in poor reliability and limited pressure resistance. In some high-pressure dredging operations, hose rupture and breakage are prone to occur, and the personal safety of the workers cannot be guaranteed.

[0012] 2. The pressure testing and unblocking process is cumbersome. Because there is only one hose, when a blockage is found during the pressure testing of the instrument pipeline, in order to prevent debris from flowing back into the manual pressure testing pump and water tank, thereby damaging the manual pressure testing pump, and to prevent the wastewater used for pressure testing from being reused and blocking the instrument pipeline again, the pressure testing and unblocking operation requires repeatedly disassembling the hose and instrument pipeline, draining the wastewater, and then pressurizing clean water until the blockage is cleared. Therefore, a simple pressure testing and unblocking operation becomes very complicated, with repetitive procedures and low efficiency. It not only wastes manpower but also increases the uncertainty of safety during the operation, greatly reducing the timeliness of the operators in handling problems. Furthermore, the repeated disassembly and reassembly of the instrument pipeline and hose also reduces the connection strength.

[0013] Therefore, it is necessary to develop a new online pressure testing and unblocking tool for instrument pipelines to improve safety and ease of operation. Summary of the Invention

[0014] The purpose of this invention is to provide an online pressure testing and unblocking tool for instrument pipelines that is highly reliable, safe, adaptable, and easy to operate.

[0015] The technical solution of this utility model is:

[0016] An online pressure testing and unblocking fixture for instrument pipelines includes a water tank, a manual pressure testing pump, a test tube fixedly connected to the outlet of the manual pressure testing pump, and a ferrule ball valve III, a tee II, a tee I, a ferrule ball valve I, and a vent port sequentially arranged on the test tube. The pressure gauge II is threaded, flanged, or union-connected to the tee II. The pressure guide tube is detachably or fixedly connected to the tee I. The pressure guide tube is equipped with the ferrule ball valve II, and the interface between the pressure guide tube and the instrument pipeline is detachably connected.

[0017] Furthermore, the pressure guide tube is detachably connected to the instrument pipeline via a compression fitting. The detachable connection method is existing technology, including the compression fitting and the instrument pipeline being connected by threads and / or clamping.

[0018] Furthermore, the test tube between the outlet and the ferrule ball valve III is made of flexible tubing or stainless steel tubing, and the test tube and pressure guide tube between the ferrule ball valve III and the venting port are both made of stainless steel tubing. When connecting, the ferrule ball valve III is connected to the venting port, then the pressure guide tube and instrument pipeline are connected, and finally the ferrule ball valve III is connected to the outlet.

[0019] The threaded connection method involves installing a matching threaded fitting at the ferrule and instrument piping interface, and then tightening it with the threads to secure it. Its advantages include convenient installation and disassembly, making it suitable for applications requiring frequent maintenance or modifications. When using a threaded connection, the specifications of the threaded ferrule must be matched to the instrument piping parameters to ensure a tight seal.

[0020] The clamping connection method involves inserting the ferrule into the instrument pipeline and securing it with a clamping lock nut. The seal is achieved by the ferrule's cutting edge biting into the instrument pipeline. Advantages include: simple installation, reusability, and suitability for scenarios requiring flexible pipeline layout adjustments. No additional seals are needed; reliable sealing is achieved through mechanical clamping force, and the connector can be reused after disassembly.

[0021] Furthermore, the manual pressure testing pump is located at the top of the water tank, and its suction pipe is inserted below the liquid level in the water tank. The manual pressure testing pump is equipped with a suction pipe and a discharge pipe. The suction pipe is used to draw in water, and the discharge pipe is used to drain water. The discharge pipe includes an outlet for discharging water. The liquid in the water tank can be water or pressure testing oil. A one-way valve II is provided on the suction pipe, and a one-way valve I is provided on the discharge pipe.

[0022] Furthermore, the bottom end of the suction pipe is detachably connected to a filter screen for filtering impurities in the test pressure medium water or test pressure oil, including sand and gravel. The detachable method includes: the bottom end of the suction pipe is internally threaded; the stainless steel filter screen includes a cylindrical filter element; one end of the filter element is provided with several filter holes; the outer circumferential surface of the other end of the filter element is provided with an annular limiting plate with an outer diameter larger than the outer diameter of the filter element and the outer diameter of the suction pipe; the outer diameter of the filter element matches the inner diameter of the suction pipe; the outer circumferential surface of the filter element is provided with external threads; the filter element and the suction pipe are connected by threads, and the limiting plate is locked at the bottom of the suction pipe and restricts the position of the filter element.

[0023] Furthermore, the pore size of the filter is between 0.25mm and 2mm, depending on the water quality. Generally, we use clean water for cleaning to avoid using sewage containing too many impurities, which could cause blockage during the pressure testing and unblocking process. The filter we are currently using has a pore size of 1mm. After an instrument pipeline is pressure tested and unblocked online, the filter screen will be removed for cleaning in preparation for the next use.

[0024] Furthermore, the structure and operation of the manual pressure testing pump are existing technologies. The manual pressure testing pump is a water pressure testing instrument. The manual pressure testing pump includes a pump body, a handle, a plunger, a pressure gauge I, and a switch for opening and closing. When the plunger is lifted by the handle, a vacuum is generated in the pump body, and the one-way valve II opens the clean water inlet filter and the inlet pipe to enter the pump body. When the handle is pressed down, the one-way valve II closes, the one-way valve I opens, and pressurized water is output and enters the test tube. This process is repeated to achieve the rated pressure test.

[0025] Furthermore, the manual pressure testing pump includes a sealing ring, thereby achieving dynamic sealing between the plunger and the pump body in the manual pressure testing pump through the sealing ring;

[0026] Furthermore, this instrument pipeline online pressure testing and unblocking fixture adopts a skid-mounted design, meaning that it also includes a trolley with pulleys and a push handle. The trolley has storage boxes on both sides for holding all pipes, valves, pressure gauges, etc., except for the water tank and manual pressure testing pump. The two storage boxes contain components such as test tubes, pressure guiding tubes, compression ball valves I, II, and III, pressure gauges I and II, etc. The water tank is positioned between the two storage boxes, and the manual pressure testing pump is positioned above the water tank. The manual pressure testing pump can be secured to the two storage boxes. Both storage boxes are connected to cover plates via hinges. If the test tubes or pressure guiding tubes are long or already installed, they can be placed directly on the cover plates of the two storage boxes for easy transport.

[0027] When not in operation, all components are detachably mounted on the trolley. The trolley has four casters at the bottom, and the casters are fixed in position by a support plate after being moved.

[0028] The beneficial effects of this utility model are as follows:

[0029] In this fixture, the pressure guide pipe is connected to the instrument pipeline interface through a compression fitting, which features secure and safe installation.

[0030] This fixture is equipped with multiple pressure gauges. During pressurization, the pressure is monitored through these gauges. When the pressure reaches a certain value, to prevent pipe bursts, the compression ball valve I can be opened to release the pressure and then repressurize. If necessary, the compression ball valve III can be closed to prevent sewage backflow. Simultaneously, the manual pressure pump's outlet pipe is equipped with a check valve I, which also prevents sewage backflow. This pressurization and dredging process is repeated, ensuring the pressure will not exceed the preset value. Therefore, it offers high reliability and strong safety adaptability. By repeatedly pressurizing and releasing the pressure to clear the instrument pipeline, the use of the compression ball valve III and check valve I eliminates the need for repeated disassembly and reconnection of the pipeline. Only multiple compression ball valves need to be controlled, making operation simple, efficient, and labor-saving. It also reduces safety uncertainties during operation and improves the timeliness of problem-solving for operators.

[0031] This tooling equipment is highly adaptable to safety, low in cost, and easy to operate, greatly improving the operability of pressurizing and unblocking instrument pipelines, and is highly safe and reliable.

[0032] This filter is easy to disassemble and wash, and can be easily pushed to the site for use via a trolley. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the online pressure testing and unblocking tooling for instrument pipelines of this utility model.

[0034] Figure 2 This is a schematic diagram of the filter screen and the water suction pipe;

[0035] Figure 3 This is a top view of the filter.

[0036] Figure 4 This is a diagram of a stroller;

[0037] In the picture:

[0038] 1. Compression Fold Ball Valve I 2. Compression Fold Ball Valve II 3. Compression Fold Ball Valve III

[0039] 4. Check valve I 5. Handle 6. Check valve II

[0040] 7. Pressure gauge I 8. Pressure gauge II 9. Tee I

[0041] 10. Compression fitting; 11. Water tank; 12. Manual pressure testing pump.

[0042] 13. Filter screen; 14. Suction pipe; 12-1. Piston

[0043] 12-3, Sealing ring; 12-4, Switch; 12-5, Water outlet.

[0044] 15. Pressure guiding tube; 16. Test tube; 17. Tee II

[0045] 12-6, Pump body; 13-1, Filter element; 13-2, Filter holes

[0046] 13-3, Limiting plate; 18, Trolley; 19, Storage box Detailed Implementation

[0047] Example 1:

[0048] An online pressure testing and unblocking fixture for instrument pipelines has the following structure: a water tank 11, a manual pressure testing pump 12, a test tube 16 fixedly connected to the outlet 12-5 of the manual pressure testing pump 12, a ferrule ball valve III3, a tee II17, a tee I9, a ferrule ball valve I1, and a vent are sequentially arranged on the test tube 16. The pressure gauge II8 is connected to the tee II17 by a flange to ensure a firm connection. The pressure guiding pipe 15 is connected to the tee I9 by a thread. The pressure guiding pipe 15 is equipped with a ferrule ball valve II2. The pressure guiding pipe 15 is clamped to the interface of the instrument pipeline through a ferrule connector 10.

[0049] The manual pressure testing pump 12 is installed at the top of the water tank 11. The suction pipe 14 of the manual pressure testing pump 12 is inserted below the liquid level in the water tank 11. The manual pressure testing pump 12 is equipped with a suction pipe 14 and a discharge pipe. The suction pipe 14 is used to draw water, and the discharge pipe is used to drain water. The discharge pipe includes a water outlet 12-5 for discharging water. The liquid in the water tank 11 is water. A one-way valve II 6 is provided on the suction pipe 14. A one-way valve I 4 is provided on the discharge pipe.

[0050] The bottom end of the water suction pipe 14 is detachably connected to the filter screen 13 for filtering impurities in the water, including sand and gravel. The detachable method includes: the bottom end of the water suction pipe 14 is internally threaded; the stainless steel filter screen 13 includes a cylindrical filter element 13-1; one end of the filter element 13-1 is provided with several filter holes 13-2; the outer circumferential surface of the other end of the filter element 13-1 is provided with an annular limiting plate 13-3 with an outer diameter larger than the outer diameter of the filter element 13-1 and the outer diameter of the water suction pipe 14; the outer diameter of the filter element 13-1 matches the inner diameter of the water suction pipe 14; the outer circumferential surface of the filter element 13-1 is provided with external threads; the filter element 13-1 and the water suction pipe 14 are connected by threads, and the limiting plate 13-3 is locked at the bottom of the water suction pipe 14 and restricts the position of the filter element 13-1.

[0051] Furthermore, the test tube 16 of the outlet 12-5 and the ferrule ball valve Ⅲ3 is a flexible tube, and the test tube 16 and the pressure guide tube 15 between the ferrule ball valve Ⅲ3 and the venting port are all made of stainless steel. When connecting, the ferrule ball valve Ⅲ3 is connected to the venting port, then the pressure guide tube 15 and the instrument pipeline are connected, and finally the ferrule ball valve Ⅲ3 is connected to the outlet 12-5. All the above connections use ferrule fittings to ensure the tightness of the connection.

[0052] Furthermore, the manual pressure testing pump 12 is commercially available and includes a pump body 12-6, a handle 5, a piston 12-1, a pressure gauge I7, and an on / off switch 12-4. The operation of the manual pressure testing pump 12 can be divided into two stages: a liquid suction stage and a liquid discharge stage. These two stages are achieved through the reciprocating motion of the piston 12-1.

[0053] Liquid suction phase: When the handle 5 is pressed down, the piston 12-1 moves upward, increasing the space below the piston head and creating a negative pressure area. Due to the negative pressure, the one-way valve II 6 is opened, while the one-way valve I 4 closes due to the pressure difference. At this time, the liquid in the water tank 11 enters the piston chamber below the pump body 12-6 through the suction pipe 14. As the piston 12-1 continues to rise, more and more liquid is drawn into the piston chamber below until the maximum stroke position is reached.

[0054] Drainage Phase: When the handle 5 is released by the user, the piston 12-1 rebounds due to the spring or gravity. The piston 12-1 then moves downwards, reducing the space below its head and compressing the liquid. At this time, the one-way valve I4 opens due to the increased pressure, while the one-way valve II6 closes due to the pressure difference. The compressed liquid flows out through the outlet pipe, one-way valve I4, and outlet 12-5 into the test tube 16.

[0055] Furthermore, the manual pressure testing pump 12 includes a sealing ring 12-3, thereby achieving dynamic sealing between the plunger and the pump body 12-6 in the manual pressure testing pump 12 through the sealing ring 12-3, preventing pressurized water from leaking from the plunger movement gap.

[0056] This instrument pipeline online pressure testing and unblocking fixture is skid-mounted. Specifically, it includes a trolley 18 with casters and a push handle. After the fixture is pushed to the appropriate position, the four casters at the bottom of the trolley 18 are fixed in place by support plates. The water tank 11 is positioned between two storage boxes 19, and the manual pressure testing pump 12 is located above the water tank 11 and is secured to the two storage boxes 19. After all components are installed, the operation of this instrument pipeline online pressure testing and unblocking fixture is as follows:

[0057] Step 1. Installation of the online pressure testing and unblocking fixture for this instrument pipeline and its interface with the pipeline of the instrument under test.

[0058] All switches 12-4 of the compression ball valves I1, II2, and III3 are closed. The pressure guide pipe 15 is connected and secured to the instrument pipeline interface through the compression fitting 10. Since the purchased compression fitting 10 is used for the connection, it has high strength and pressure resistance. Therefore, the connection is not easily broken when subjected to pressure impact, thus ensuring safety.

[0059] Step 2. Check the pipeline of this instrument's online pressure testing and unblocking tool for leaks.

[0060] First, open the ferrule ball valve Ⅲ3 and close the ferrule ball valve Ⅰ1 and ferrule ball valve Ⅱ2. Manually operate the handle 5 of the manual test pump 12 to slowly increase the pressure. Observe the readings of pressure gauge Ⅱ8 and pressure gauge Ⅰ7. When the pressure reaches the test pressure of about 4-5 MPa, stop pressurizing and check the system pipeline for leaks. After holding the pressure for 1 minute, you can determine whether there are any leaks in the pipeline between ferrule ball valve Ⅰ1, ferrule ball valve Ⅱ2 and the suction pipe 14. Ensure good sealing. Any leaking parts need to be tightened or reinstalled.

[0061] Furthermore, in the above process, the pressure values ​​of pressure gauges II8 and I7 are only for reference and do not require precise measurement. Pressure gauges II8 and I7 will display the pressure value in the system in real time. As long as there is no leakage in the pipeline during the pressurization process, it is sufficient. By shaking the handle 5, the plunger is moved back and forth, and the medium is forced into the system under test. The pointers of pressure gauges II8 and I7 move with the increase of pressure until the target value is reached. The selection of pressure gauges II8 and I7 is based on the pressure level of the manual pressure testing pump 12, following the principle of range adaptation and accuracy matching. The range of pressure gauges II8 and I7 is not less than 1.5 times the test pressure. For example, if the maximum test pressure is 10 MPa, then the range of pressure gauges II8 and I7 is 15 MPa.

[0062] Step 3. Determine if the pressure-conducting tube 15 is unobstructed from the interface of the instrument under test. If not, repeatedly pressurize to clear the blockage. This step has two scenarios:

[0063] The first scenario: when there is a pressure gauge on the pipeline of the instrument being tested.

[0064] Open the ferrule ball valve II2. The fluid medium sequentially enters the area between the pressure guide tube 15 and the interface of the instrument under test, the instrument under test pipeline, and the vicinity of the pressure gauge on the instrument under test pipeline. At this time, observe whether the readings on pressure gauge II8, pressure gauge I7, and the pressure gauge on the instrument under test pipeline are consistent.

[0065] ① If the pressure gauges II8 and I7 have the same readings as the pressure gauges on the instrument pipeline being tested, then the instrument pipeline is considered to be unobstructed. In this case, the ferrule ball valve III3 can be closed and the ferrule ball valve I1 can be opened to release the pressure.

[0066] For discharge, we usually discharge it separately into a sewage tank to avoid environmental pollution. The sewage will be taken back to the company for further treatment.

[0067] ② If the pressure gauge on the tested instrument pipeline does not display a value, it indicates that the pressure is not being transmitted to the pressure gauge on the tested instrument pipeline. In this case, the pipeline is blocked and pressure testing is required to clear the blockage. The specific steps are as follows:

[0068] A. Close the ferrule ball valve I1, open the ferrule ball valve III3 and ferrule ball valve II2, and manually operate the handle 5 in the manual pressure test pump 12 to pressurize, and the pressure will continue to rise;

[0069] B. Observe the three pressure gauges. When the pressure continues to rise to 8-10 MPa, in order to avoid the pipeline from bursting, open the ferrule ball valve I1 and close the ferrule ball valve III3 to discharge the pressure and avoid backflow.

[0070] C. Repeat steps A and B above. Based on experience, we have concluded that if the pressure displayed on pressure gauges II8 and I7 drops sharply to 0 MPa during the discharge process, repeated flushing and discharge are necessary until pressure gauges I7 and II stabilize and stop rising in step A, and maintain the same pressure as the system pressure or the pressure gauge on the tested instrument pipeline. This indicates that the instrument pipeline has been cleared.

[0071] D. Slowly open the ferrule ball valve I1 and close the ferrule ball valve III3 to discharge the instrument medium sequentially from the instrument under test pipeline, pressure guide pipe 15, ferrule ball valve II2, tee I9, test pipe 16, and venting port.

[0072] The second scenario: when there is no pressure gauge on the pipeline of the instrument being tested.

[0073] The design pressure of the instrument pipeline to be pressure tested and cleared is known. That is, the initial design pressure of the system during operation is 4-5 MPa. We will use this as a reference standard to determine whether the pipeline is unobstructed by whether this standard can be achieved.

[0074] Open the ferrule ball valve II2, and the fluid medium enters between the pressure guide tube 15 and the pipeline interface of the instrument under test. Observe whether the pressure gauge II8 and pressure gauge I7 have values. This application mainly judges whether the pipeline is unobstructed by whether the pressure gauge II8 and pressure gauge I7 have values ​​and how much the values ​​are.

[0075] ① If the pressure gauges II8 and I7 are consistent with the design pressure of the instrument pipeline, it can be determined that the pipeline is unobstructed. Then, the ferrule ball valve III3 can be closed and the ferrule ball valve I1 can be opened to discharge.

[0076] For discharge, we usually discharge it separately into a sewage tank to avoid environmental pollution. The sewage will be taken back to the company for further treatment.

[0077] ② If pressure gauges II8 and I7 do not display any value, or if the pressure difference between pressure gauges II8 and I7 and the system pressure is 20%-30%, or if they remain fixed at each value, and the discharge is intermittent and not smooth, all of the above situations indicate that the pressure is not being transmitted to the pipeline of the instrument being tested. In this case, pressure testing and unblocking should be performed. The specific steps are as follows:

[0078] A. Close the ferrule ball valve I1, open the ferrule ball valve III3 and ferrule ball valve II2, and manually operate the handle 5 in the manual pressure test pump 12 to pressurize, and the pressure will continue to rise;

[0079] B. When the pressure continues to rise to 8-10 MPa, in order to avoid the pipeline from bursting, open the ferrule ball valve I1 and close the ferrule ball valve III3 to discharge the pressure and prevent backflow.

[0080] During the above process, when manually operating the handle 5 of the manual pressure test pump 12 to pressurize, it is obvious that it is difficult or even impossible to press the handle 5. In order to avoid the pipeline from bursting, the pressure does not necessarily have to rise to 8-10 MPa before it can be discharged. As long as it is difficult to press, it can be discharged and repressurized and flushed repeatedly to clear the instrument pipeline little by little.

[0081] C. Repeat steps A and B above. Based on experience, we have concluded that during the discharge process, the pressure of pressure gauges II8 and I7 drops sharply to 0 MPa. It is necessary to repeatedly flush and discharge until the pressure gauges I7 and II8 stabilize and stop rising in step A and maintain the design pressure of the instrument pipeline.

[0082] D. Slowly open the ferrule ball valve I1 and close the ferrule ball valve III3 to discharge the instrument medium sequentially from the instrument under test pipeline, pressure guide pipe 15, ferrule ball valve II2, tee I9, test pipe 16, and venting port.

[0083] Step 4. Repeatedly open and close the ball valve I1 and observe the pressure gauges II8 and I7. If the readings do not increase or decrease, it can be determined that the pressure guide pipe 15 is unobstructed.

[0084] Step 5. Put the instrument system into operation, remove the compression fitting 10 between the pressure guide pipe 15 and the instrument pipeline interface, and complete the pressure test, unblocking and discharge.

[0085] Step 6. Store all components of this device in storage box 19 to complete the entire online pressure testing and unblocking process of the instrument pipeline.

[0086] The manual pressure testing pump 12, various pipes, and various valves in this utility model, including ferrule ball valve III3, tee II17, tee I9, pressure gauge II8, pressure gauge I7, check valve I4, check valve II6, and ferrule fitting 10, are all purchased from the market and their functions are consistent with existing technologies. Their structures and principles will not be described in detail here.

[0087] The working principle of the manual pressure testing pump 12 is as follows:

[0088] 1. Install the handle 5 and check if the suction pipe 14 is submerged in water.

[0089] 2. Tighten switch 12-4 clockwise to put it in the "pressure supply" position.

[0090] 3. When the handle 5 moves upward, the working medium is drawn into the high-pressure pump body 12-6 through the filter screen 13, the water inlet valve of the suction pipe 14.

[0091] 4. When the handle 5 moves downward, the medium in the water cylinder is forced into the test tube 16 through the one-way valve I4 and the outlet 12-5 of the water outlet pipe.

[0092] 5. Loosen switch 12-4 counterclockwise to allow the medium to flow back to water tank 11.

[0093] This instrument allows for online pressure testing and unblocking of pipelines, eliminating the need for repeated disassembly. The entire pressure testing and unblocking process is simple, convenient, and safe.

[0094] This online pressure testing and unblocking fixture is designed based on Pascal's Law. Its core principle is to amplify human effort through mechanical levers, combined with two one-way valves to achieve unidirectional pressure delivery. The entire unblocking process is safe and reliable, simplifying the complex and tedious disassembly and assembly process into a single, highly efficient operation. Eliminating repeated disassembly and assembly reduces certain steps, significantly improving work efficiency and operability. It effectively controls the environmental pollution caused by materials during sewage unblocking, making the entire operation time-saving, labor-saving, safe, environmentally friendly, and reliable.

[0095] After the test is completed, store all pipes, valves, pressure gauges, etc. in the storage box 19 except for the water tank 11 and the manual test pump 12, and then close the cover to complete the storage.

[0096] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A tooling for online pressure testing and unblocking of instrument pipelines, characterized in that: The system includes a water tank, a manual pressure testing pump, a test tube fixedly connected to the outlet of the manual pressure testing pump, a ferrule ball valve III, a three-way valve II, a three-way valve I, a ferrule ball valve I, and a vent, all sequentially arranged on the test tube. A pressure gauge II is connected to the three-way valve II, and a pressure guiding pipe is connected to the three-way valve I. The pressure guiding pipe is equipped with a ferrule ball valve II, and the interface between the pressure guiding pipe and the instrument pipeline is detachably connected. The manual pressure testing pump is located at the top of the water tank. The manual pressure testing pump is equipped with a suction pipe and a discharge pipe. The suction pipe of the manual pressure testing pump is inserted below the liquid level in the water tank. A one-way valve II is provided on the suction pipe. A one-way valve I is provided on the discharge pipe.

2. The instrument pipeline online pressure testing and unblocking tool according to claim 1, characterized in that: The pressure guide tube is detachably connected to the instrument pipeline via a compression fitting.

3. The instrument pipeline online pressure testing and unblocking tool according to claim 2, characterized in that: The bottom end of the water suction pipe is detachably connected to a filter screen. The detachable method includes: the bottom end of the water suction pipe is internally threaded; the stainless steel filter screen includes a cylindrical filter core; one end of the filter core is provided with several filter holes; the outer circumferential surface of the other end of the filter core is provided with an annular limiting plate with an outer diameter larger than the outer diameter of the filter core and the outer diameter of the water suction pipe; the outer diameter of the filter core matches the inner diameter of the water suction pipe; the outer circumferential surface of the filter core is provided with external threads; the filter core and the water suction pipe are connected by threads, and the limiting plate is locked at the bottom of the water suction pipe and restricts the position of the filter core.

4. The instrument pipeline online pressure testing and unblocking tool according to claim 3, characterized in that: The pore size of the filter is between 0.25mm and 2mm.

5. The instrument pipeline online pressure testing and unblocking tool according to any one of claims 1-4, characterized in that: This instrument pipeline online pressure testing and unblocking fixture is skid-mounted, meaning it also includes a trolley with pulleys and a push handle. The trolley has storage boxes on both sides, and the water tank is located between the two storage boxes. The manual pressure testing pump is located on top of the water tank and is secured to the two storage boxes. Both storage boxes are connected to a cover plate via hinges.

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