Anti-blocking pressure measuring device

Abstract

The utility model discloses a kind of anti-blocking pressure measuring devices, it is related to pipeline pressure measuring technical field, including pressure measuring main body and piston assembly, the lower end both sides of pressure measuring main body can be respectively connected into to-be-measured pressure pipeline, the lower end of pressure measuring main body is equipped with main flow channel, test cavity is equipped in pressure measuring main body, piston assembly is detachably set in test cavity, and test cavity is separated into independent upper cavity and lower cavity, lower cavity one end is communicated with main flow channel, upper cavity both sides are equipped with high-pressure flow channel and low-pressure flow channel communicated with upper cavity respectively;High-pressure test assembly and low-pressure test assembly are equipped on pressure measuring main body, high-pressure test assembly one end is communicated with high-pressure flow channel, low-pressure test assembly one end is communicated with low-pressure flow channel;High-pressure plugging assembly and low-pressure plugging assembly are equipped on pressure measuring main body, solve the current pressure measuring device easy to be blocked by to-be-measured medium, pressure measuring assembly is easy to damage, maintenance is complicated and the problem of unstable pressure measuring effect.

Description

Technical Field

[0001] This utility model relates to the field of pipeline pressure measurement technology, specifically to an anti-clogging pressure measurement device. Background Technology

[0002] In industrial production, municipal engineering, energy transmission, and oil and gas drilling operations, pipeline pressure monitoring is a core component ensuring the safe and stable operation of the system. Pressure measurement data directly provides crucial information for process control, fault early warning, and equipment protection. Currently, the industry widely adopts direct pressure measurement technology, which involves directly introducing the medium (including particulate fluids, viscous media, corrosive fluids, or gases containing impurities) from the pipeline to be measured into pressure gauges, pressure sensors, and other pressure measurement components through a pressure measurement channel to achieve direct acquisition of pressure signals. This method has become the mainstream choice for current pressure measurement scenarios due to its simple structure and low cost.

[0003] However, direct pressure measurement technology has inherent drawbacks that are difficult to avoid: solid particles, flocculent matter, precipitates, and other impurities in the measured medium easily accumulate and adhere to the pressure measurement channel and the interface of the pressure measurement component, leading to channel blockage, distortion of pressure measurement data, or even inability to monitor continuously. At the same time, highly corrosive and viscous media directly contacting the pressure measurement component can cause corrosion, scaling, or adhesion of the sensing element, significantly shortening the service life of the pressure measurement device. These problems not only affect the accuracy of monitoring but also require frequent shutdowns for disassembly, cleaning, repair, and replacement of parts, greatly increasing operation and maintenance costs and, in severe cases, even interfering with production continuity.

[0004] To alleviate the above problems, existing technologies have attempted improvements such as filter screen filtration, flow channel thickening, and periodic rinsing, or by adopting a sealed pressure testing structure to reduce direct contact between the medium and the pressure testing components. However, the practical application effects are limited: the filter screen itself is easily clogged by impurities, requiring additional disassembly and cleaning costs; thickening the flow channel cannot fundamentally solve the problem of viscous media or fine particle deposition; periodic rinsing is cumbersome and difficult to adapt to continuous operation conditions; and the sealed structure, due to unreasonable design, often encounters new problems such as media leakage, pressure transmission lag, or corrosion damage to the seals, failing to achieve effective isolation between the tested medium and the pressure testing components. Therefore, there is an urgent need to develop an anti-clogging pressure testing device. Utility Model Content

[0005] Based on this, and in response to the above problems, this utility model proposes an anti-clogging pressure measuring device, which solves the problems of current pressure measuring devices being easily blocked by the medium to be measured, the pressure measuring components being easily damaged, the maintenance being cumbersome, and the pressure measuring effect being unstable.

[0006] The technical solution of this utility model is:

[0007] A pressure testing device for preventing blockage includes a pressure testing body and a piston assembly. The lower ends of the pressure testing body can be connected to the pipes to be tested on both sides, and are connected to the flanges of the pipes to be tested. The lower end of the pressure testing body has a main flow channel communicating with the pipes to be tested. A test chamber is provided inside the pressure testing body. The piston assembly is detachably installed in the test chamber and divides the test chamber into an independent upper chamber and a lower chamber. The upper chamber is used to contain the test medium, and one end of the lower chamber is connected to the main flow channel. High-pressure flow channels and low-pressure flow channels communicating with the upper chamber are respectively provided on both sides of the upper chamber. A high-pressure test group is provided on the pressure testing body. The pressure testing body includes a high-pressure test component and a low-pressure test component. The high-pressure test component and the low-pressure test component are respectively located on the top two sides of the pressure testing body and are detachably connected to the pressure testing body. One end of the high-pressure test component is connected to the high-pressure flow channel, and the other end of the low-pressure test component is connected to the low-pressure flow channel. The pressure testing body is equipped with a high-pressure blocking component and a low-pressure blocking component. The high-pressure blocking component and the low-pressure blocking component are respectively located on the upper two sides of the pressure testing body and are respectively threaded to the pressure testing body. The high-pressure blocking component is used to control the opening or closing of the high-pressure flow channel, and the low-pressure blocking component is used to control the opening or closing of the low-pressure flow channel.

[0008] Preferably, the piston assembly includes a piston housing, a sliding piston, and a pair of piston end caps. The piston housing is disposed within the test chamber and is threadedly connected to the test chamber. The piston housing has a sliding groove inside, and each end of the piston housing has a limiting groove communicating with the sliding groove. The pair of piston end caps are respectively disposed within the limiting grooves and are threadedly connected to the piston housing. Each pair of piston end caps has several through holes. The sliding piston is disposed within the sliding groove and is slidably connected to the piston housing. Each end of the sliding piston has a guide rod. One end of the guide rod is fixedly connected to the sliding piston, and the other end passes through the piston end cap and is slidably connected to the piston end cap.

[0009] Preferably, a pair of first sealing rings are provided on the outer side of the piston housing, the pair of first sealing rings are embedded in the lower end of the piston housing, and one side of the pair of first sealing rings respectively contacts the inner wall of the test chamber. A second sealing ring is provided on the outer side of the sliding piston, the second sealing ring is embedded in the middle of the sliding piston, and one side of the second sealing ring contacts the inner wall of the sliding groove.

[0010] Preferably, the pressure measuring body has a high-pressure sealing hole and a low-pressure sealing hole on both sides of its upper end. One end of the high-pressure sealing hole penetrates one side of the pressure measuring body, and the other end is connected to the high-pressure flow channel. One end of the high-pressure sealing component is set in the high-pressure sealing hole and is threadedly connected to the high-pressure sealing hole. One end of the low-pressure sealing hole penetrates the other side of the pressure measuring body, and the other end is connected to the low-pressure flow channel. One end of the low-pressure sealing component is set in the low-pressure sealing hole and is threadedly connected to the low-pressure sealing hole.

[0011] Preferably, both the high-pressure plugging assembly and the low-pressure plugging assembly include a screw rod, a screw cap, and a sealing plug. The screw rod passes through both ends of the screw cap and is fixedly connected to it. The sealing plug is fitted onto one end of the screw rod and is fixedly connected to it. The end of the screw rod with the sealing plug is fixedly provided with an insertion part. A pair of third sealing rings are provided on the outside of the sealing plug, and the pair of third sealing rings are fitted and installed on the outside of the sealing plug. A V-shaped sealing washer is fitted on the screw rod, and the V-shaped sealing washer is located between the screw cap and the sealing plug and is fixedly connected to the screw rod. In the high-pressure plugging assembly, the screw cap is threadedly connected to the high-pressure plugging hole, the sealing plug is slidably connected to the high-pressure plugging hole, and the insertion part is inserted into the high-pressure flow channel to control the opening or closing of the high-pressure flow channel. In the low-pressure plugging assembly, the screw cap is threadedly connected to the low-pressure plugging hole, the sealing plug is slidably connected to the low-pressure plugging hole, and the insertion part is inserted into the low-pressure flow channel to control the opening or closing of the low-pressure flow channel.

[0012] Preferably, the high-pressure testing assembly includes a high-pressure conversion connector and a high-pressure shockproof pressure gauge. A high-pressure threaded groove is provided on one side of the top of the pressure testing body. One end of the high-pressure conversion connector is set in the high-pressure threaded groove and is threadedly connected to the high-pressure threaded groove. The high-pressure shockproof pressure gauge is set on the high-pressure conversion connector and is threadedly connected to the high-pressure conversion connector. A high-pressure test flow channel is provided inside the high-pressure conversion connector. One end of the high-pressure test flow channel extends to communicate with the high-pressure shockproof pressure gauge, and the other end extends to communicate with the high-pressure sealing hole.

[0013] Preferably, the low-pressure test assembly includes a low-pressure conversion connector and a low-pressure shockproof pressure gauge. A low-pressure threaded groove is provided on the other side of the top of the pressure testing body. One end of the low-pressure conversion connector is disposed in the low-pressure threaded groove and is threadedly connected to the low-pressure threaded groove. The low-pressure shockproof pressure gauge is disposed on the low-pressure conversion connector and is threadedly connected to the low-pressure conversion connector. A low-pressure test flow channel is provided inside the low-pressure conversion connector. One end of the low-pressure test flow channel extends to communicate with the low-pressure shockproof pressure gauge, and the other end extends to communicate with the low-pressure sealing hole.

[0014] Preferably, the upper cavity extends through the top of the pressure measuring body, and a pressure cap is provided on the top of the pressure measuring body. The pressure cap is installed in the upper cavity and threadedly connected to the upper cavity to seal the upper cavity. A high-pressure one-way valve is provided on one side of the high-pressure conversion connector, and one end of the high-pressure one-way valve is threadedly connected to the high-pressure conversion connector and communicates with the high-pressure test flow channel. A low-pressure one-way valve is provided on one side of the low-pressure conversion connector, and one end of the low-pressure one-way valve is threadedly connected to the low-pressure conversion connector and communicates with the low-pressure test flow channel. A test one-way valve is provided on one side of the pressure measuring body, and one end of the test one-way valve is threadedly connected to the pressure measuring body and communicates with the main flow channel.

[0015] Preferably, the high-pressure check valve, low-pressure check valve, and test check valve all include a check valve body, a valve head, a spring, a sealing ball, and a valve cover. The check valve body has a one-way flow channel extending through both ends of the check valve body. The one-way flow channel has a conical sealing port that mates with the sealing ball. The valve head is located at one end of the check valve body, inserted into one end of the one-way flow channel, and threadedly connected to the one-way flow channel. The spring and sealing ball are both located within the one-way flow channel, with the sealing ball contacting the conical sealing port. The spring is located between the sealing ball and the valve head, with one end contacting the sealing ball and the other end contacting the end of the valve head. The valve cover is located at the other end of the check valve body and threadedly connected to it. A sealing protrusion is fixed inside the cover and inserted into the other end of the one-way flow channel. The valve head has a connecting flow channel that runs through both ends of the valve head, with one end of the connecting flow channel connected to the one-way flow channel. In the high-pressure one-way valve, one end of the one-way valve body is threaded to one side of the high-pressure conversion connector, and the other end of the connecting flow channel on the valve head extends to connect with the high-pressure test flow channel. In the low-pressure one-way valve, one end of the one-way valve body is threaded to one side of the low-pressure conversion connector, and the other end of the connecting flow channel on the valve head extends to connect with the low-pressure test flow channel. In the test one-way valve, one end of the one-way valve body is threaded to one side of the pressure measuring body, and the other end of the connecting flow channel on the valve head extends to connect with the main flow channel.

[0016] Preferably, a pressure relief groove is provided on one side of both the high-voltage conversion connector and the low-voltage conversion connector. The pressure relief groove on the high-voltage conversion connector extends to communicate with the high-voltage test flow channel, and the pressure relief groove on the low-voltage conversion connector extends to communicate with the low-voltage test flow channel. A pressure relief screw is provided in the pressure relief groove of both the high-voltage and low-voltage conversion connectors. One end of the pressure relief screw is threaded to the pressure relief groove, and the other end is inserted into the extension end of the pressure relief groove to seal the extension end of the pressure relief groove. A pressure relief flow channel is provided in the pressure relief screw, with one end of the flow channel passing through the pressure relief screw and the other end extending into the pressure relief groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The anti-clogging pressure measuring device of this invention, in use, divides the test chamber of the pressure measuring body into an independent upper chamber and a lower chamber through a piston assembly. The lower chamber is connected to the pipeline to be tested through a main flow channel to receive the test medium. The upper chamber contains the test medium and is connected to the high-pressure test component and the low-pressure test component through a high-pressure flow channel and a low-pressure flow channel, respectively. By transmitting force through the piston assembly, the pressure of the pipeline by the test medium can be indirectly measured. At the same time, the opening and closing of the corresponding flow channels are controlled by the high-pressure blocking component and the low-pressure blocking component, respectively, to adapt to high-pressure and low-pressure measurement environments. The piston assembly, high-pressure test component, and low-pressure test component are all detachably connected, and the high-pressure blocking component and the low-pressure blocking component are all threaded connections. The pressure measuring body is connected to the pipeline to be tested through a flange, which not only facilitates the installation of the device but also reduces the difficulty and cost of later maintenance. It solves the problems of current pressure measuring devices being easily clogged by the test medium, easily damaged pressure measuring components, cumbersome maintenance, and unstable pressure measuring results. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic cross-sectional view of an anti-clogging pressure measuring device described in an embodiment of this utility model. Figure 1 ;

[0021] Figure 2 This is a schematic cross-sectional view of an anti-clogging pressure measuring device described in an embodiment of this utility model. Figure 2 ;

[0022] Figure 3 This is as described in the embodiments of this utility model. Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0023] Figure 4 This is as described in the embodiments of this utility model. Figure 2 A magnified schematic diagram of the local structure at point B;

[0024] Figure 5 This is a schematic cross-sectional view of an anti-clogging pressure measuring device described in an embodiment of this utility model. Figure 3 ;

[0025] Figure 6 This is as described in the embodiments of this utility model. Figure 5 A magnified schematic diagram of the partial structure at point A in the middle;

[0026] Figure 7 This is as described in the embodiments of this utility model. Figure 5 A magnified schematic diagram of the local structure at point B;

[0027] Figure 8 This is as described in the embodiments of this utility model. Figure 5 A magnified schematic diagram of the local structure at point C;

[0028] Figure 9 This is as described in the embodiments of this utility model. Figure 5 A magnified schematic diagram of the local structure at point D;

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Pressure testing body, 11-Piston assembly, 12-Main flow channel, 13-Test chamber, 14-Upper chamber, 15-Lower chamber, 16-High-pressure flow channel, 17-Low-pressure flow channel, 18-High-pressure test assembly, 19-Low-pressure test assembly, 20-High-pressure plugging assembly, 21-Low-pressure plugging assembly, 22-Piston housing, 23-Sliding piston, 24-Piston end cap, 25-Sliding groove, 26-Limiting groove, 27-Through hole, 28-Guide slide rod, 29-First sealing ring, 30-Second sealing ring, 31-High-pressure plugging hole, 32-Low-pressure plugging hole, 33-Setting screw, 34-Setting screw cap, 35-Sealing plug, 36-Insertion part 37-Third sealing ring, 38-V-type sealing gasket, 39-High pressure conversion connector, 40-High pressure shockproof pressure gauge, 41-High pressure threaded groove, 42-High pressure test flow channel, 43-Low pressure conversion connector, 44-Low pressure shockproof pressure gauge, 45-Low pressure threaded groove, 46-Low pressure test flow channel, 47-Glander cap, 48-High pressure check valve, 49-Low pressure check valve, 50-Test check valve, 51-Check valve body, 52-Valve head, 53-Spring, 54-Sealing ball, 55-Valve cover, 56-One-way flow channel, 57-Conical sealing port, 58-Sealing protrusion, 59-Connecting flow channel, 60-Pressure relief groove, 61-Pressure relief screw, 62-Pressure relief flow channel. Detailed Implementation

[0031] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0032] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0035] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0037] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0038] Example:

[0039] like Figures 1 to 9 As shown, this embodiment discloses an anti-clogging pressure testing device, including a pressure testing body 10 and a piston assembly 11. The lower ends of the pressure testing body 10 can be connected to the pipes to be tested on both sides and are connected to the flanges of the pipes to be tested. The lower end of the pressure testing body 10 has a main flow channel 12 communicating with the pipe to be tested. A test chamber 13 is provided inside the pressure testing body 10. The piston assembly 11 is detachably installed inside the test chamber 13, dividing the test chamber 13 into an independent upper chamber 14 and a lower chamber 15. The upper chamber 14 is used to contain the test medium, and one end of the lower chamber 15 is connected to the main flow channel 12. High-pressure flow channels 16 and low-pressure flow channels 17 communicating with the upper chamber 14 are respectively provided on both sides of the upper chamber 14. The pressure testing body 10 has a high-pressure flow channel 16 and a low-pressure flow channel 17 communicating with the upper chamber 14. The pressure testing assembly 18 and the low-pressure testing assembly 19 are respectively disposed on the top sides of the pressure testing body 10 and are detachably connected to the pressure testing body 10. One end of the high-pressure testing assembly 18 is connected to the high-pressure flow channel 16, and one end of the low-pressure testing assembly 19 is connected to the low-pressure flow channel 17. The pressure testing body 10 is provided with a high-pressure blocking assembly 20 and a low-pressure blocking assembly 21. The high-pressure blocking assembly 20 and the low-pressure blocking assembly 21 are respectively disposed on the upper sides of the pressure testing body 10 and are threadedly connected to the pressure testing body 10. The high-pressure blocking assembly 20 is used to control the opening or closing of the high-pressure flow channel 16, and the low-pressure blocking assembly 21 is used to control the opening or closing of the low-pressure flow channel 17.

[0040] In use, the anti-clogging pressure measuring device of this utility model divides the test chamber 13 of the pressure measuring body 10 into an independent upper chamber 14 and a lower chamber 15 through the piston assembly 11. The lower chamber 15 is connected to the pipeline to be tested through the main flow channel 12 to receive the test medium. The upper chamber 14 contains the test medium and is connected to the high-pressure test component 18 and the low-pressure test component 19 through the high-pressure flow channel 16 and the low-pressure flow channel 17, respectively. By transmitting the force through the piston assembly 11, the pressure of the pipeline can be indirectly measured by the test medium. The high-pressure test component 18 and the low-pressure test component 19 do not directly contact the test medium. At the same time, the opening and closing of the corresponding flow channels are controlled by the high-pressure blocking component 20 and the low-pressure blocking component 21, respectively, to adapt to high-pressure and low-pressure measurement environments. The piston assembly 11, high-pressure test assembly 18, and low-pressure test assembly 19 are all detachably connected, while the high-pressure plugging assembly 20 and low-pressure plugging assembly 21 are threaded connections. The pressure testing body 10 is connected to the pipeline under test via a flange, which not only facilitates device installation but also reduces the difficulty and cost of subsequent maintenance. Clean No. 20 machine oil can be used as the test medium.

[0041] To facilitate the installation of the piston assembly 11, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the piston assembly 11 includes a piston housing 22, a sliding piston 23, and a pair of piston end caps 24. The piston housing 22 is disposed in the test chamber 13 and is threadedly connected to the test chamber 13. The piston housing 22 is provided with a sliding groove 25. The piston housing 22 is provided with limiting grooves 26 at both ends that communicate with the sliding grooves 25. The pair of piston end caps 24 are respectively disposed in the limiting grooves 26 and are threadedly connected to the piston housing 22. The pair of piston end caps 24 are respectively provided with several through holes 27. The sliding piston 23 is disposed in the sliding groove 25 and is slidably connected to the piston housing 22. The sliding piston 23 is provided with guide rods 28 at both ends. One end of the guide rod 28 is fixedly connected to the sliding piston 23, and the other end passes through the piston end cap 24 and is slidably connected to the piston end cap 24.

[0042] The piston housing 22 is threadedly connected to the test chamber 13, which facilitates the installation of the piston assembly 11. In use, the test medium in the pipeline under test enters the sliding groove 25 through the through hole 27 on one of the piston end caps 24, thereby pushing the sliding piston 23 and the guide rod 28 to move upward, thus squeezing the test medium in the upper chamber 14, thereby indirectly testing the pressure of the test medium in the pipeline under test.

[0043] To improve the sealing performance of the piston assembly 11 and the mounting location, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that a pair of first sealing rings 29 are provided on the outer side of the piston housing 22. The pair of first sealing rings 29 are embedded in the lower end of the piston housing 22, and one side of the pair of first sealing rings 29 contacts the inner wall of the test chamber 13. A second sealing ring 30 is provided on the outer side of the sliding piston 23. The second sealing ring 30 is embedded in the middle of the sliding piston 23, and one side of the second sealing ring 30 contacts the inner wall of the sliding groove 25.

[0044] The first sealing ring 29 facilitates improved sealing at the piston assembly 11 mounting point, effectively separating the upper cavity 14 and the lower cavity 15. The second sealing ring 30 facilitates improved sealing of the piston assembly 11, effectively separating the medium to be tested from the test medium.

[0045] To facilitate switching between high-pressure and low-pressure testing, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the upper end of the pressure measuring body 10 is provided with a high-pressure blocking hole 31 and a low-pressure blocking hole 32 on both sides respectively. One end of the high-pressure blocking hole 31 penetrates one side of the pressure measuring body 10, and the other end is connected to the high-pressure flow channel 16. One end of the high-pressure blocking component 20 is set in the high-pressure blocking hole 31 and is threadedly connected to the high-pressure blocking hole 31. One end of the low-pressure blocking hole 32 penetrates the other side of the pressure measuring body 10 and the other end is connected to the low-pressure flow channel 17. One end of the low-pressure blocking component 21 is set in the low-pressure blocking hole 32 and is threadedly connected to the low-pressure blocking hole 32.

[0046] Both the high-pressure plugging assembly 20 and the low-pressure plugging assembly 21 include a screw rod 33, a screw cap 34, and a sealing plug 35. The screw rod 33 passes through both ends of the screw cap 34 and is fixedly connected to the screw cap 34. The sealing plug 35 is sleeved on one end of the screw rod 33 and is fixedly connected to the screw rod 33. The end of the screw rod 33 with the sealing plug 35 is fixedly provided with an insertion part 36. A pair of third sealing rings 37 are provided on the outside of the sealing plug 35. The pair of third sealing rings 37 are embedded and installed on the outside of the sealing plug 35. A V-shaped sealing gasket 38 is sleeved on the screw rod 33. The V-shaped sealing gasket 38 is a set of composite V-shaped sealing gaskets. A V-shaped sealing gasket 38 is located between the set screw cap 34 and the sealing plug 35, and is fixedly connected to the set screw rod 33. In the high-pressure sealing assembly 20, the set screw cap 34 is threadedly connected to the high-pressure sealing hole 31, the sealing plug 35 is slidably connected to the high-pressure sealing hole 31, and the insertion part 36 is inserted into the high-pressure flow channel 16 to control the opening or closing of the high-pressure flow channel 16. In the low-pressure sealing assembly 21, the set screw cap 34 is threadedly connected to the low-pressure sealing hole 32, the sealing plug 35 is slidably connected to the low-pressure sealing hole 32, and the insertion part 36 is inserted into the low-pressure flow channel 17 to control the opening or closing of the low-pressure flow channel 17.

[0047] By setting high-pressure sealing holes 31 and low-pressure sealing holes 32 on both sides of the upper end of the pressure measuring body 10, respectively, which are connected to the high-pressure flow channel 16 and the low-pressure flow channel 17, and matching the high-pressure sealing assembly 20 and the low-pressure sealing assembly 21 with the same structure, the axial movement of the top screw rod 33 is achieved by the threaded connection between the top screw cap 34 and the sealing groove. The opening and closing of the high-pressure flow channel 16 or the low-pressure flow channel 17 is controlled by inserting or withdrawing the insertion part 36 at the end of the top screw rod 33 into or out of the corresponding flow channel, thereby conveniently switching between high-pressure and low-pressure test modes. The setting of the third sealing ring 37 and the V-shaped sealing gasket 38 can improve the sealing performance and separate the air from the test medium. The third sealing ring 37 and the V-shaped sealing gasket 38 slide in contact with the high-pressure sealing hole 31 or the low-pressure sealing hole 32, respectively.

[0048] In another embodiment, the set screw 33 can be threadedly connected to the set screw cap 34. This structure allows the axial movement of the set screw 33 to be achieved by directly rotating the set screw 33. When rotating the set screw 33, additional tools are required to keep the set screw cap 34 stationary.

[0049] To ensure more accurate testing and protect the pressure gauge, when the pipeline pressure is below 15 MPa, manually close the high-pressure flow channel 16 and open the low-pressure flow channel 17; conversely, when the pressure is above 15 MPa, close the low-pressure flow channel 17 and open the high-pressure flow channel 16.

[0050] To facilitate high-pressure testing, this embodiment is an improvement upon the above embodiment. The difference from the above embodiment is that the high-pressure testing assembly 18 includes a high-pressure conversion connector 39 and a high-pressure shockproof pressure gauge 40. A high-pressure threaded groove 41 is provided on one side of the top of the pressure testing body 10. One end of the high-pressure conversion connector 39 is disposed in the high-pressure threaded groove 41 and is threadedly connected to the high-pressure threaded groove 41. The high-pressure shockproof pressure gauge 40 is disposed on the high-pressure conversion connector 39 and is threadedly connected to the high-pressure conversion connector 39. A high-pressure test flow channel 42 is provided inside the high-pressure conversion connector 39. One end of the high-pressure test flow channel 42 extends to communicate with the high-pressure shockproof pressure gauge 40, and the other end extends to communicate with the high-pressure sealing hole 31.

[0051] The high-pressure adapter 39 facilitates the installation of the high-pressure shockproof pressure gauge 40. The high-pressure shockproof pressure gauge 40 can be used to test high pressure.

[0052] To facilitate low-pressure testing, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the low-pressure testing component 19 includes a low-pressure conversion connector 43 and a low-pressure shockproof pressure gauge 44. A low-pressure threaded groove 45 is provided on the other side of the top of the pressure testing body 10. One end of the low-pressure conversion connector 43 is disposed in the low-pressure threaded groove 45 and is threadedly connected to the low-pressure threaded groove 45. The low-pressure shockproof pressure gauge 44 is disposed on the low-pressure conversion connector 43 and is threadedly connected to the low-pressure conversion connector 43. A low-pressure testing flow channel 46 is provided in the low-pressure conversion connector 43. One end of the low-pressure testing flow channel 46 extends to communicate with the low-pressure shockproof pressure gauge 44, and the other end extends to communicate with the low-pressure sealing hole 32.

[0053] The low-pressure adapter 43 facilitates the installation of the low-pressure shockproof pressure gauge 44. The low-pressure shockproof pressure gauge 44 can be used to test low pressure. The high-pressure gauge has a testing range of 0-200 MPa, and the low-pressure gauge has a testing range of 0-16 MPa.

[0054] To facilitate the injection or discharge of the test medium, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the upper cavity 14 penetrates the top of the pressure measuring body 10, and the top of the pressure measuring body 10 is provided with a pressure cap 47. The pressure cap 47 is installed in the upper cavity 14 and is threadedly connected to the upper cavity 14 to seal the upper cavity 14. A high-pressure one-way valve 48 is provided on one side of the high-pressure conversion connector 39. One end of the high-pressure one-way valve 48 is threadedly connected to the high-pressure conversion connector 39 and communicates with the high-pressure test flow channel 42. A low-pressure one-way valve 49 is provided on one side of the low-pressure conversion connector 43. One end of the low-pressure one-way valve 49 is threadedly connected to the low-pressure conversion connector 43 and communicates with the low-pressure test flow channel 46. A test one-way valve 50 is provided on one side of the pressure measuring body 10. One end of the test one-way valve 50 is threadedly connected to the pressure measuring body 10 and communicates with the main flow channel 12.

[0055] The gland 47 is designed to facilitate the discharge of the test medium. The low-pressure check valve 49 and the high-pressure check valve 48 are designed to facilitate the injection of the test medium into the upper chamber 14. The test check valve 50 is designed to facilitate the injection of the test medium into the main flow channel 12 and the lower chamber 15 during factory shipment or maintenance.

[0056] The high-pressure check valve 48, low-pressure check valve 49, and test check valve 50 all include a check valve body 51, a valve head 52, a spring 53, a sealing ball 54, and a valve cover 55. The check valve body 51 has a one-way flow channel 56 extending through both ends of the check valve body 51. The one-way flow channel 56 has a conical sealing port 57 that mates with the sealing ball 54. The valve head 52 is located at one end of the check valve body 51, inserted into one end of the one-way flow channel 56, and threadedly connected to the one-way flow channel 56. The spring 53 and the sealing ball 54 are both located within the one-way flow channel 56, with the sealing ball 54 contacting the conical sealing port 57. The spring 53 is located between the sealing ball 54 and the valve head 52, with one end contacting the sealing ball 54 and the other end contacting the end of the valve head 52. The valve cover 55 is located at the other end of the check valve body 51 and threadedly connected to it. The valve cover 55 is fixedly provided with a sealing protrusion 58, which is inserted into the other end of the one-way flow channel 56. The valve head 52 is provided with a connecting flow channel 59 that runs through both ends of the valve head 52. One end of the connecting flow channel 59 is connected to the one-way flow channel 56. In the high-pressure one-way valve 48, one end of the one-way valve body 51 is threadedly connected to one side of the high-pressure conversion connector 39, and the other end of the connecting flow channel 59 on the valve head 52 extends to connect with the high-pressure test flow channel 42. In the low-pressure one-way valve 49, one end of the one-way valve body 51 is threadedly connected to one side of the low-pressure conversion connector 43, and the other end of the connecting flow channel 59 on the valve head 52 extends to connect with the low-pressure test flow channel 46. In the test one-way valve 50, one end of the one-way valve body 51 is threadedly connected to one side of the pressure measuring body 10, and the other end of the connecting flow channel 59 on the valve head 52 extends to connect with the main flow channel 12.

[0057] When test medium needs to be injected, unscrew the valve cap 55, connect the test medium delivery equipment, and the test medium enters the one-way flow channel 56, impacting the sealing ball 54 and compressing the spring 53, thus entering through the connecting flow channel 59 to achieve the injection of the test medium. After injection, tighten the valve cap 55. After injection stops, the sealing ball 54, under the restoring force of the spring 53, re-presses against the conical sealing opening 57 to achieve a seal. The spring 53 is in a certain compressed state when not injecting, which facilitates pressing the sealing ball 54 against the conical sealing opening 57.

[0058] To facilitate pressure relief, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that a pressure relief groove 60 is provided on one side of the high-pressure conversion connector 39 and the low-pressure conversion connector 43. The pressure relief groove 60 on the high-pressure conversion connector 39 extends to communicate with the high-pressure test flow channel 42, and the pressure relief groove 60 on the low-pressure conversion connector 43 extends to communicate with the low-pressure test flow channel 46. A pressure relief screw 61 is provided in the pressure relief groove 60 on both the high-pressure conversion connector 39 and the low-pressure conversion connector 43. One end of the pressure relief screw 61 is threaded to the pressure relief groove 60, and the other end is inserted into the extended end of the pressure relief groove 60 to close the extended end of the pressure relief groove 60. A pressure relief flow channel 62 is provided in the pressure relief screw 61. One end of the pressure relief flow channel 62 passes through the pressure relief screw 61, and the other end extends into the pressure relief groove 60.

[0059] When the pressure exceeds a certain level and pressure relief is needed to protect the pressure gauge, simply unscrew the pressure relief screw 61 a certain distance to achieve pressure relief. At the same time, most of the structure of the pressure relief screw 61 remains connected, which plays a role in preventing loosening.

[0060] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements 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 pressure measuring device for preventing blockage, characterized in that, The pressure measuring body (10) and piston assembly (11) are included. The pressure measuring body (10) can be connected to the pipeline to be tested on both sides of its lower end and is connected to the flange of the pipeline to be tested. The pressure measuring body (10) has a main flow channel (12) at its lower end that is connected to the pipeline to be tested. The pressure measuring body (10) has a test chamber (13) inside. The piston assembly (11) is detachably installed in the test chamber (13) and divides the test chamber (13) into an independent upper chamber (14) and a lower chamber (15). The upper chamber (14) is used to contain the test medium. One end of the lower chamber (15) is connected to the main flow channel (12). The upper chamber (14) has a high-pressure flow channel (16) and a low-pressure flow channel (17) on both sides that are connected to the upper chamber (14). The pressure measuring body (10) is equipped with a high-pressure test component (18) and a low-pressure test component (17). The pressure testing assembly (19), the high pressure testing assembly (18) and the low pressure testing assembly (19) are respectively set on the top two sides of the pressure testing body (10) and are detachably connected to the pressure testing body (10). One end of the high pressure testing assembly (18) is connected to the high pressure flow channel (16) and one end of the low pressure testing assembly (19) is connected to the low pressure flow channel (17). The pressure testing body (10) is provided with a high pressure blocking assembly (20) and a low pressure blocking assembly (21). The high pressure blocking assembly (20) and the low pressure blocking assembly (21) are respectively set on the upper two sides of the pressure testing body (10) and are respectively threaded to the pressure testing body (10). The high pressure blocking assembly (20) is used to control the opening or closing of the high pressure flow channel (16) and the low pressure blocking assembly (21) is used to control the opening or closing of the low pressure flow channel (17).

2. The anti-blocking pressure measuring device according to claim 1, characterized in that, The piston assembly (11) includes a piston housing (22), a sliding piston (23), and a pair of piston end caps (24). The piston housing (22) is located inside the test chamber (13) and is threadedly connected to the test chamber (13). The piston housing (22) has a sliding groove (25). The piston housing (22) has a limiting groove (26) at both ends that communicate with the sliding groove (25). The pair of piston end caps (24) are located in the limiting grooves (26) and are threadedly connected to the piston housing (22). The pair of piston end caps (24) have several through holes (27). The sliding piston (23) is located in the sliding groove (25) and is slidably connected to the piston housing (22). The sliding piston (23) has guide rods (28) at both ends. One end of the guide rod (28) is fixedly connected to the sliding piston (23), and the other end passes through the piston end cap (24) and is slidably connected to the piston end cap (24).

3. The anti-blocking pressure measuring device according to claim 2, characterized in that, A pair of first sealing rings (29) are provided on the outside of the piston housing (22). The pair of first sealing rings (29) are embedded in the lower end of the piston housing (22). One side of the pair of first sealing rings (29) is in contact with the inner wall of the test chamber (13). A second sealing ring (30) is provided on the outside of the sliding piston (23). The second sealing ring (30) is embedded in the middle of the sliding piston (23). One side of the second sealing ring (30) is in contact with the inner wall of the sliding groove (25).

4. The anti-clogging pressure measuring device according to claim 3, characterized in that, The pressure measuring body (10) has a high-pressure sealing hole (31) and a low-pressure sealing hole (32) on both sides of its upper end. One end of the high-pressure sealing hole (31) passes through one side of the pressure measuring body (10), and the other end is connected to the high-pressure flow channel (16). One end of the high-pressure sealing component (20) is set inside the high-pressure sealing hole (31) and is threadedly connected to the high-pressure sealing hole (31). One end of the low-pressure sealing hole (32) passes through the other side of the pressure measuring body (10), and the other end is connected to the low-pressure flow channel (17). One end of the low-pressure sealing component (21) is set inside the low-pressure sealing hole (32) and is threadedly connected to the low-pressure sealing hole (32).

5. The anti-clogging pressure measuring device according to claim 4, characterized in that, Both the high-pressure plugging assembly (20) and the low-pressure plugging assembly (21) include a screw rod (33), a screw cap (34), and a sealing plug (35). The screw rod (33) passes through both ends of the screw cap (34) and is fixedly connected to the screw cap (34). The sealing plug (35) is sleeved on one end of the screw rod (33) and is fixedly connected to the screw rod (33). The end of the screw rod (33) with the sealing plug (35) is fixedly provided with an insertion part (36). A pair of third sealing rings (37) are provided on the outside of the sealing plug (35). The pair of third sealing rings (37) are embedded and installed on the outside of the sealing plug (35). A V-shaped sealing washer (38) is sleeved on the screw rod (33). The set screw cap (34) is located between the set screw cap (34) and the sealing plug (35), and is fixedly connected to the set screw rod (33); wherein, the set screw cap (34) in the high pressure sealing assembly (20) is threadedly connected to the high pressure sealing hole (31), the sealing plug (35) is slidably connected to the high pressure sealing hole (31), and the plug part (36) is inserted into the high pressure flow channel (16) to control the opening or closing of the high pressure flow channel (16); the set screw cap (34) in the low pressure sealing assembly (21) is threadedly connected to the low pressure sealing hole (32), the sealing plug (35) is slidably connected to the low pressure sealing hole (32), and the plug part (36) is inserted into the low pressure flow channel (17) to control the opening or closing of the low pressure flow channel (17).

6. The anti-blocking pressure measuring device according to claim 5, characterized in that, The high-pressure test assembly (18) includes a high-pressure conversion connector (39) and a high-pressure shockproof pressure gauge (40). The pressure testing body (10) has a high-pressure threaded groove (41) on one side of its top. One end of the high-pressure conversion connector (39) is set in the high-pressure threaded groove (41) and is threadedly connected to the high-pressure threaded groove (41). The high-pressure shockproof pressure gauge (40) is set on the high-pressure conversion connector (39) and is threadedly connected to the high-pressure conversion connector (39). The high-pressure conversion connector (39) has a high-pressure test flow channel (42) inside. One end of the high-pressure test flow channel (42) extends to communicate with the high-pressure shockproof pressure gauge (40), and the other end extends to communicate with the high-pressure sealing hole (31).

7. The anti-clogging pressure measuring device according to claim 6, characterized in that, The low-pressure test assembly (19) includes a low-pressure conversion connector (43) and a low-pressure shockproof pressure gauge (44). The other side of the top of the pressure testing body (10) is provided with a low-pressure threaded groove (45). One end of the low-pressure conversion connector (43) is set in the low-pressure threaded groove (45) and is threadedly connected to the low-pressure threaded groove (45). The low-pressure shockproof pressure gauge (44) is set on the low-pressure conversion connector (43) and is threadedly connected to the low-pressure conversion connector (43). The low-pressure conversion connector (43) is provided with a low-pressure test flow channel (46). One end of the low-pressure test flow channel (46) extends to communicate with the low-pressure shockproof pressure gauge (44), and the other end extends to communicate with the low-pressure sealing hole (32).

8. The anti-clogging pressure measuring device according to claim 7, characterized in that, The upper cavity (14) penetrates the top of the pressure measuring body (10). The pressure measuring body (10) is provided with a pressure cap (47) at the top. The pressure cap (47) is installed inside the upper cavity (14) and is threadedly connected to the upper cavity (14) to seal the upper cavity (14). A high-pressure one-way valve (48) is provided on one side of the high-pressure conversion connector (39). One end of the high-pressure one-way valve (48) is threadedly connected to the high-pressure conversion connector (39) and is connected to the high-pressure test flow channel (42). A low-pressure one-way valve (49) is provided on one side of the low-pressure conversion connector (43). One end of the low-pressure one-way valve (49) is threadedly connected to the low-pressure conversion connector (43) and is connected to the low-pressure test flow channel (46). A test one-way valve (50) is provided on one side of the pressure measuring body (10). One end of the test one-way valve (50) is threadedly connected to the pressure measuring body (10) and is connected to the main flow channel (12).

9. The anti-clogging pressure measuring device according to claim 8, characterized in that, The high-pressure check valve (48), low-pressure check valve (49), and test check valve (50) all include a check valve body (51), a valve head (52), a spring (53), a sealing ball (54), and a valve cover (55). The check valve body (51) has a one-way flow channel (56) that runs through both ends of the check valve body (51). The one-way flow channel (56) has a conical sealing port (57) that cooperates with the sealing ball (54). The valve head (52) is located at one end of the check valve body (51). The valve head (52) is inserted into the valve body. The valve body (51) is threaded into one end of the one-way flow channel (56). Both the spring (53) and the sealing ball (54) are located within the one-way flow channel (56), with the sealing ball (54) contacting the conical closure (57). The spring (53) is positioned between the sealing ball (54) and the valve head (52), with one end of the spring (53) contacting the sealing ball (54) and the other end contacting the end of the valve head (52). The valve cover (55) is located at the other end of the one-way valve body (51) and is threaded into the one-way valve body. (51) Threaded connection, a sealing protrusion (58) is fixedly provided inside the valve cover (55), the sealing protrusion (58) is inserted into the other end of the one-way flow channel (56), and a connecting flow channel (59) is provided on the valve head (52) through both ends of the valve head (52), one end of the connecting flow channel (59) is connected to the one-way flow channel (56); wherein, one end of the one-way valve body (51) in the high-pressure one-way valve (48) is threadedly connected to one side of the high-pressure conversion connector (39), and the other end of the connecting flow channel (59) on the valve head (52) is threadedly connected to the other end of the connecting flow channel (59). One end extends to communicate with the high pressure test flow channel (42), one end of the one-way valve body (51) in the low pressure one-way valve (49) is threaded to one side of the low pressure conversion connector (43), and the other end of the connecting flow channel (59) on the valve head (52) extends to communicate with the low pressure test flow channel (46), one end of the one-way valve body (51) in the test one-way valve (50) is threaded to one side of the pressure measuring body (10), and the other end of the connecting flow channel (59) on the valve head (52) extends to communicate with the main flow channel (12).

10. The anti-blocking pressure measuring device according to claim 9, characterized in that, A pressure relief groove (60) is provided on one side of the high-pressure conversion connector (39) and the low-pressure conversion connector (43). The pressure relief groove (60) on the high-pressure conversion connector (39) extends to communicate with the high-pressure test channel (42), and the pressure relief groove (60) on the low-pressure conversion connector (43) extends to communicate with the low-pressure test channel (46). A pressure relief screw (61) is provided in the pressure relief groove (60) on both the high-pressure conversion connector (39) and the low-pressure conversion connector (43). One end of the pressure relief screw (61) is threaded to the pressure relief groove (60), and the other end is inserted into the extension end of the pressure relief groove (60) to seal the extension end of the pressure relief groove (60). A pressure relief channel (62) is provided in the pressure relief screw (61). One end of the pressure relief channel (62) passes through the pressure relief screw (61), and the other end extends into the pressure relief groove (60).

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