Pressure detection device and pressure detection method

Abstract

The present invention relates to a pressure detection device and a pressure detection method. The pressure detection device is used to test the pressure bearing capacity of the pressure-bearing section in the pump body sealing structure, and includes: a seat body, the seat body is provided with a through accommodating cavity and an exhaust hole and a liquid inlet hole respectively connected to the accommodating cavity, the accommodating cavity is a stepped cavity, used to accommodate an insert ring and an insert ring support seat; a plug, detachably installed in the exhaust hole; a fastener, installed on the seat body, the seat body is fastened to the insert ring support seat through the fastener, so that the cavity wall of the accommodating cavity, the insert ring and the insert ring support seat are surrounded to form a pressure-bearing cavity connected to the liquid inlet hole and the exhaust hole; an injection pump, connected to the liquid inlet hole, used to pump liquid into the pressure-bearing cavity. The pressure detection device of the present invention has a simple structure, the seat body and the pump body sealing structure are easy to connect and install, and the pressure bearing capacity of the pressure-bearing section can be verified.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a pressure testing device and a pressure testing method. Background Technology

[0002] In the reactor coolant system of a nuclear power plant, reactor coolant pumps are used to drive high-temperature, high-pressure, and radioactive coolant to pass through the reactor core and transfer the heat generated in the core to the steam generator.

[0003] Under normal operating conditions, the reactor coolant pump sealing system consists of multiple stages of series-connected sealing structures. Through continuous multi-stage leakage, the system pressure is transitioned to atmospheric pressure, ultimately preventing the leakage of radioactive high-pressure primary coolant into the environment. However, when a stage of sealing structure fails, a next-stage sealing structure is required to replace it and prevent high-pressure coolant leakage, bearing the entire pressure of the previous stage's circuit.

[0004] Existing pressure testing devices are not only complex in structure and inconvenient to install and operate in conjunction with the sealing system of the reactor coolant pump, but also cannot independently verify the pressure-bearing capacity of the pressure-bearing section in the sealing structure without the sealing components of the sealing system being fully installed. Summary of the Invention

[0005] Therefore, it is necessary to provide a pressure testing device to address the problem that existing technologies cannot verify the pressure-bearing capacity of the pressure-bearing section in the reactor coolant pump sealing structure separately.

[0006] A pressure-bearing testing device is used to test the pressure-bearing capacity of the pressure-bearing section in a pump body sealing structure. The pump body sealing structure includes an insert ring and an insert ring support connected to the insert ring. The pressure-bearing testing device includes:

[0007] The base has a through cavity and an exhaust port and a liquid inlet port connected to the cavity. The cavity is a stepped cavity used to accommodate the insertion ring and the insertion ring support.

[0008] A plug is detachably installed in the vent hole;

[0009] Fasteners are installed on the base, and the base is fastened to the insertion ring support by the fasteners, so that the cavity wall of the receiving cavity, the insertion ring and the insertion ring support surround a pressure-bearing cavity that communicates with the liquid inlet and the vent.

[0010] A liquid injection pump, connected to the liquid inlet, is used to pump liquid into the pressure chamber.

[0011] In one embodiment, the receiving cavity includes a first cavity and a second cavity that are connected along the axial direction. The width of the first cavity is greater than the width of the second cavity. The liquid inlet and the vent are respectively connected to the first cavity. The insertion ring includes a first portion that is received in the side wall of the second cavity and a second portion that is received in the first cavity. The insertion ring support includes a third portion that is received in the first cavity.

[0012] In one embodiment, a groove is provided on the cavity wall of the second cavity, the groove extending circumferentially along the seat, the groove being used to accommodate the first seal.

[0013] In one embodiment, the base is provided with a guide hole that is opened along the axial direction, and the insertion ring support is provided with a guide post corresponding to the guide hole.

[0014] In one embodiment, the liquid inlet is a first stepped hole, which includes a first inner diameter segment, a second inner diameter segment, and a third inner diameter segment connected in sequence and whose inner diameter decreases in sequence. The first inner diameter segment communicates with the outer surface of the seat, and the third inner diameter segment communicates with the receiving cavity.

[0015] In one embodiment, the vent is a second stepped hole, which includes a fourth inner diameter segment, a fifth inner diameter segment, and a sixth inner diameter segment connected in sequence and whose inner diameter decreases in sequence. The fourth inner diameter segment communicates with the outer surface of the seat, and the sixth inner diameter segment communicates with the receiving cavity.

[0016] In one embodiment, a sealing ring is provided in the fourth inner diameter section, and the plug portion abuts against the sealing ring.

[0017] In one embodiment, a second seal is provided on the base, and when the base is securely connected to the insertion ring support, the second seal is sandwiched between the base and the insertion ring support.

[0018] In one embodiment, the fastener includes a stud and a nut, the base is provided with a through hole for the stud to pass through, both ends of the stud pass through the through hole and are respectively fitted with the nut.

[0019] In one embodiment, a pressure-bearing testing method is also provided, which uses the pressure-bearing testing device as described in any of the preceding claims to test the pressure-bearing capacity of the pressure-bearing section in a pump body sealing structure, wherein the pump body sealing structure includes an insert ring and an insert ring support connected to the insert ring, and includes the following steps:

[0020] The seat, the insertion ring, and the insertion ring support are fastened together by fasteners so that the cavity wall of the receiving cavity, the insertion ring, and the insertion ring support surround and form a pressure-bearing cavity that communicates with the liquid inlet and the vent.

[0021] Open the vent and inject liquid into the pressure chamber using the injection pump;

[0022] Seal the vent hole with a plug;

[0023] The liquid injection pump continues to inject liquid into the pressure chamber, and it is determined whether there is any liquid leakage from the pressure chamber.

[0024] The aforementioned pressure testing device has a receiving cavity on its base to accommodate the insertion ring and insertion ring support of the pump body sealing structure. When the base is securely connected to the insertion ring support, the cavity wall, the insertion ring, and the insertion ring support on the base form a pressure-bearing cavity communicating with the inlet and outlet. The injection pump pumps liquid into the pressure-bearing cavity through the inlet to fill it with liquid. The outlet is sealed with a plug to keep the pressure-bearing cavity sealed, thus allowing the pressure-bearing capacity of the pressure-bearing section of the pump body sealing structure to be tested without installing all components of the pump body sealing structure.

[0025] The above-mentioned pressure testing method can use a pressure testing device to verify the pressure-bearing capacity of the pressure-bearing section in the pump body sealing structure, namely the insertion ring and the insertion ring support. The operation is simple and convenient. Attached Figure Description

[0026] Figure 1 A simplified structural diagram of a pump body sealing structure in the prior art;

[0027] Figure 2 A simplified cross-sectional structural diagram of the pressure testing device provided in an embodiment of the present invention;

[0028] Figure 3 A simplified cross-sectional view of the pressure testing device and the pump body sealing structure provided in this embodiment of the invention.

[0029] Figure 4 A simplified top view of the base of the pressure testing device provided in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100 - Pump body sealing structure; 101 - Insertion ring; 1011 - Flange; 1013 - Insertion ring support; 102 - Fixed ring; 1021 - Fixed ring seat; 1022 - First seal; 103 - Dynamic ring; 104 - Sealing retainer ring; 1014 - First part; 1015 - Second part; 1016 - Third part;

[0032] 200 - Pressure-bearing area; 300 - Pressure-bearing cavity;

[0033] 1-base body;

[0034] 11-Receiving cavity; 111-First cavity; 112-Second cavity; 1121-Groove;

[0035] 12 - Exhaust port; 121 - Fourth inner diameter section; 122 - Fifth inner diameter section; 123 - Sixth inner diameter section;

[0036] 13-Inlet hole; 131-First inner diameter section; 132-Second inner diameter section; 133-Third inner diameter section;

[0037] 14-Guide hole; 15-First seal; 16-Through hole; 17-Guide post; 18-Third seal;

[0038] 2-Fasteners; 21-Studs; 22-Nuts; 23-Washers. Detailed Implementation

[0039] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 this invention.

[0041] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this 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 or an electrical 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0045] Figure 1 A simplified structural diagram of a pump body sealing structure in the prior art is shown. The sealing system of a reactor coolant pump in the prior art consists of a multi-stage series sealing structure, which transitions the system pressure to atmospheric pressure through continuous multi-stage leakage, ultimately preventing the leakage of radioactive high-pressure primary coolant into the environment. Figure 1The pump body sealing structure in this design is an intermediate-stage structure, which generally does not require pressure bearing, but needs to withstand coolant pressure when the preceding pump body sealing structure fails. The pump body sealing structure 100 includes an insertion ring 101, a fixed ring 102, a rotating ring 103 that rotates with the pump shaft, and a sealing retainer ring 104. A gap exists between the fixed ring seat 1021 of the fixed ring 102 and the sealing retainer ring 104, forming a pressure-bearing region 200 between the axial end faces of the engagement portion of the fixed ring seat 1021 and the insertion ring 101. The insertion ring 101 engages with an insertion ring support seat 1013 on the side of the insertion ring 101 facing away from the fixed ring 102, thus fixing the insertion ring 101. When the preceding pump body sealing structure fails, coolant can enter the pressure-bearing region 200 through the gap between the fixed ring seat 1021 and the sealing retainer ring 104 of the fixed ring 102, exerting significant pressure on the insertion ring 101. Typically, a spring is installed in the fixed ring seat 1021. The fixed ring 102 is subjected to spring force and liquid pressure, and can move slightly up and down relative to the moving ring 103 depending on the force applied. Up and down refers to movement along the axial direction of the main shaft. For ease of understanding, in this application, the position of the fixed ring 102 relative to the moving ring 103 is defined as "above", and the position of the moving ring 103 relative to the fixed ring 102 is defined as "below".

[0046] Combination Figure 2 and Figure 3 , Figure 2 A cross-sectional schematic diagram of a pressure testing device according to an embodiment of the present invention is shown. Figure 3 A simplified cross-sectional schematic diagram of the pressure-bearing testing device and the pump body sealing structure after assembly is shown in one embodiment of the present invention. The pressure-bearing testing device provided in one embodiment of the present invention is used to test the pressure-bearing capacity of the pressure-bearing section in the pump body sealing structure 100. The pump body sealing structure 100 includes an insertion ring 101 and an insertion ring support 1013 connected to the insertion ring 101.

[0047] The pressure testing device includes a base 1, a plug, fasteners 2, and a liquid injection pump. The pressure-bearing section mainly consists of the parts of the pump body sealing structure 100 where the insertion ring 101 and the insertion ring support 1013 bear pressure.

[0048] like Figure 2 As shown, the base 1 has a through-hole accommodating cavity 11 and an inlet hole 13 and an outlet hole 12 respectively connected to the accommodating cavity 11. The accommodating cavity 11 is a stepped cavity used to accommodate the insertion ring 101, or to accommodate the insertion ring 101 and other part of the pump body sealing structure 100 connected to the insertion ring 101, that is, the insertion ring support seat 1013 connected to the insertion ring 101. A plug is detachably installed in the outlet hole 12 to seal the outlet hole 12. Fasteners 2 are installed on the base 1, such as... Figure 3As shown, the seat 1 is fastened to the insertion ring support 1013 of the pump body sealing structure 100 by fasteners 2, so that the cavity wall of the receiving cavity 11, the insertion ring 101 housed in the receiving cavity 11, and the insertion ring support 1013 surround and form a pressure-bearing cavity 300 communicating with the liquid inlet 13 and the vent 12. The injection pump is connected to the liquid inlet 13 and is used to pump liquid into the receiving cavity 11. When the seat 1 is fastened to the insertion ring support 1013 of the pump body sealing structure 100 by fasteners 2, the liquid pumped into the receiving cavity 11 by the injection pump is used to fill the pressure-bearing cavity 300.

[0049] In this embodiment of the pressure testing device, a receiving cavity 11 on the base 1 is provided to accommodate the pressure-bearing section of the pump body sealing structure 100. The pressure-bearing section mainly consists of the insertion ring 101 and the force-bearing part of the insertion ring support 1031. The base 1 is connected to the insertion ring support 1031 of the pump body sealing structure 100 by fasteners 2. At this time, the cavity wall of the receiving cavity 11 on the base 1, the insertion ring support 1031, and the insertion ring 101 form a pressure-bearing cavity 300 that communicates with the liquid inlet 13 and the vent 12. The injection pump pumps liquid into the receiving cavity 11 through the liquid inlet 13 to fill the pressure-bearing cavity 300 with liquid. The vent 12 is sealed by a plug to keep the pressure-bearing cavity 300 sealed, thereby realizing the detection of the pressure-bearing capacity of the pressure-bearing section in the pump body sealing structure 100 to the liquid. The pressure-bearing testing device in this embodiment has a simple structure and is easy to install by connecting it to the pump body sealing structure 100. Furthermore, it can verify the pressure-bearing capacity of the pressure-bearing section in the pump body sealing structure 100 without requiring the complete installation of all sealing components. Specifically, the insertion ring 101 is installed on the insertion ring mounting base 1013, and then the pressure-bearing testing device is securely connected to the insertion ring mounting base 1013. This allows for the verification of the pressure-bearing capacity of the insertion ring 101 and the insertion ring support base 1031.

[0050] In some embodiments, a pressure gauge is provided on the injection pump to display the pressurization pressure of the injection pump. The operator can stop the injection action by observing the display value of the pressure gauge on the injection pump.

[0051] Combination Figure 2 and Figure 3 In some embodiments, the seat 1 is columnar, and the receiving cavity 11 includes a first cavity 111 and a second cavity 112 that are axially connected. Along the radial direction of the seat 1, the width of the first cavity 111 is greater than the width of the second cavity 112. The liquid inlet 13 and the vent 12 are respectively connected to the first cavity 111. Figure 3 As shown, the insertion ring 101 includes a first portion 1014 accommodated in the side wall of the second cavity 112 and a second portion 1015 accommodated in the first cavity 111, and the insertion ring support 1013 includes a third portion 1016 accommodated in the first cavity 111. Wherein, as... Figure 2 As shown, the opening of the first cavity 111 opposite to the second cavity 112 is connected to the lower end face of the base 1, and the openings of the second cavity 112, the liquid inlet 13, and the exhaust port 12 opposite to the openings of the first cavity 111 are all connected to the upper end face of the base 1.

[0052] In this embodiment, as described above, a flange 1011 is provided on the radially outer side of one end of the insertion ring 101. The flange 1011 extends radially along the insertion ring 101, that is, the insertion ring 101 is stepped, including a first part 1014 with a smaller outer diameter and a second part 1015 with a larger outer diameter. The flange 1011 is formed on the second part 1015. The second part 1015 and the third part 1016 of the insertion ring support 1013 are the stress-bearing parts.

[0053] In the above configuration, by matching the structural shapes of the insertion ring 101 and the insertion ring support 1013 in the pump body sealing structure 100 with the first cavity 111 and the second cavity 112 of different widths, the first part 1014 of the insertion ring 101 is accommodated in the second cavity 112, the second part 1015 and the flange 1011 of the insertion ring 101 are accommodated in the first cavity 111, and the third part 1016 of the insertion ring support 1013 is accommodated in the first cavity 111. Furthermore, the radially outer side of the first part 1014 of the insertion ring 101 is tightly fitted with the inner wall of the second cavity 112. There is a gap between the flange 1011 and the cavity wall of the first cavity 111, so that after the seat 1 and the insertion ring support 1013 are assembled, the cavity wall of the first cavity 111 of the receiving cavity 11, the second part 1015 and the first part 1014 of the insertion ring 101 housed in the receiving cavity 11, and the third part 1016 of the insertion ring support 1013 surround and form a pressure-bearing cavity 300 communicating with the liquid inlet hole 13 and the vent hole 12.

[0054] In some embodiments, the first cavity 111 and the second cavity 112 are cylindrical cavities. The inner diameter of the second cavity 112 is adapted to (equal to) the outer diameter of the first portion 1014 of the insertion ring 101, ensuring that there is no gap between the first portion 1014 of the insertion ring 101 and the inner wall of the second cavity 112. The inner diameter of the first cavity 111 is larger than the outer diameter of the flange 1011, and the length of the first cavity 111 along its axial direction is greater than the length of the flange 1011 along the axial direction of the insertion ring 101, thereby leaving space to accommodate the third portion 1016 of the insertion ring support 1013.

[0055] In some embodiments, such as Figure 2As shown, a groove 1121 is provided on the cavity wall of the second cavity 112, extending circumferentially along the seat 1. The groove 1121 is used to accommodate the first sealing member 1022. The groove 1121 on the second cavity 112 provides a receiving space for the first sealing member 1022, which is assembled radially outward of the insertion ring 101. The first sealing member 1022 can seal the first portion 1014 of the insertion ring 101 with the side wall of the seat 1, thereby reducing the probability of liquid flowing out between the first portion 1014 of the insertion ring 101 and the side wall of the seat 1 during liquid injection, and improving the sealing performance of the pressure-bearing cavity 300. In some embodiments, the first sealing member 1022 may include one of a sealing ring, a gasket, a sealing felt, etc.

[0056] In some embodiments, a second sealing element 15 is provided on the mating surface between the seat body 1 and the insertion ring support 1013. When the seat body 1 and the insertion ring support 1013 are securely connected, the second sealing element 15 is sandwiched between the seat body 1 and the insertion ring support 1013. The second sealing element 15 ensures a good seal at the connection between the seat body 1 and the insertion ring support 1013, preventing air and water leakage. Figure 2 As shown, the second seal 15 is disposed on the mating surface of the two surfaces and is located at one of the vertical mating portions. It is readily understood that the second seal 15 can also be located at the horizontal mating portion of the mating surface, and this application does not limit this. In some embodiments, the second seal 15 can be a sealing gasket, which can be sandwiched between the entire mating surface of the seat 1 and the insertion ring support 1013. Alternatively, as... Figure 2 As shown, the second sealing element 15 can also be a sealing ring. Correspondingly, a groove for accommodating the second sealing element 15 is provided on the seat 1 or the insertion ring support seat 1013. In this way, after the two are tightened, the sealing ring can be accommodated in the groove to play a sealing role, thereby further improving the sealing performance of the pressure chamber 300.

[0057] In some embodiments, such as Figure 3 As shown, the second part 1015 of the insertion ring 101 is fixedly connected to the insertion ring support 1013 by bolts. Simultaneously, a third sealing element 18 is provided between the second part 1015 and the insertion ring support 1013. The third sealing element 18 seals the gap between the insertion ring 101 and the insertion ring support 1013, preventing water in the pressure chamber 300 from leaking out through the gap, thereby further improving the sealing performance of the pressure chamber 300. Thus, by providing the first sealing element 1022, the second sealing element 15, and the third sealing element 18, the sealing performance of the pressure chamber 300 formed after assembly can be well guaranteed, making pressure testing more accurate.

[0058] In some embodiments, a guide hole 14 extending axially is provided on the lower end face of the seat 1. A guide post 17 corresponding to the guide hole 14 is provided on the insertion ring support 1013. The guide hole 14 provides accommodating space for the guide post 17 on the insertion ring support 1013, providing a pre-positioning function when the seat 1 is connected to the insertion ring support 1013. Simultaneously, it does not affect the fastening connection between the seat 1 and the insertion ring support 1013.

[0059] In some embodiments, the inlet hole 13 is a first stepped hole, comprising a first inner diameter section 131, a second inner diameter section 132, and a third inner diameter section 133 connected in sequence with decreasing inner diameters. The first inner diameter section 131 communicates with the upper end face of the seat 1, and the third inner diameter section 133 communicates with the first cavity 111 of the receiving cavity 11. The inlet hole 13 can be connected to the outlet end of the injection pump via a connector, the connector portion of which is housed in the inlet hole 13. By configuring the inlet hole 13 as a stepped hole, the plane of the stepped hole is easy to seal and install, and the flatness is easy to control, thereby improving the sealing performance between the connector and the inlet hole 13. Furthermore, a sealing gasket can be provided in the first inner diameter section 131 to further enhance the sealing performance between the connector and the inlet hole 13.

[0060] In some embodiments, the vent 12 is a second stepped hole, comprising a fourth inner diameter segment 121, a fifth inner diameter segment 122, and a sixth inner diameter segment 123 connected in sequence with decreasing inner diameters. The fourth inner diameter segment 121 connects to the upper end face of the seat 1, and the sixth inner diameter segment 123 connects to the first cavity 111 of the receiving cavity 11. Setting the vent 12 as a stepped hole ensures that its shape matches that of the injection hole 13, facilitating simultaneous machining of the vent 12 and the injection hole 13, improving machining convenience, and reducing production costs. Furthermore, the flat surface of the stepped hole facilitates sealing and installation, and since the vent 12 needs to be assembled with a plug, this also improves the sealing performance between the plug and the vent 12.

[0061] In some embodiments, a sealing ring is provided in the fourth inner diameter section 121, and the plug portion abuts against the sealing ring. By providing a sealing ring in the fourth inner diameter section 121, it is beneficial to further improve the sealing performance between the plug and the seat 1.

[0062] In some embodiments, the fastener 2 includes a stud 21 and a nut 22 threadedly connected to the stud 21. The base 1 is provided with a through hole 16 for the stud 21 to pass through, and both ends of the stud 21 pass through the through hole 16 and are respectively fitted with nuts 22.

[0063] The aforementioned locking mechanism, consisting of a stud 21 and a nut 22, secures the base 1 to the insertion ring support 1013. The base 1 and insertion ring support 1013 can be separated by removing the nut 22. Specifically, during assembly, one end of the stud 21 passes through the through hole 16 and is screwed with a nut 22. Simultaneously, the other end of the stud 21 passes through the through hole 16 and the eyelet on the insertion ring support 1013, and is also screwed with a nut 22. Rotating the two nuts 22 locks the base 1 and insertion ring support 1013 together. After locking, the first part 1014 and the second part 1015 of the insertion ring 101, the third part 1016 of the insertion ring support 1013, and the side wall of the receiving cavity 11 of the base 1 together form a pressure-bearing cavity 300.

[0064] In some embodiments, a gasket 23 is sleeved on the outside of the stud 21. When the seat 1 is assembled with the insertion ring support 1013 of the pump body sealing structure 100, a gasket 23 is provided between the upper end face of the seat 1 and the nut 22, and a gasket 23 is provided between the lower end face of the insertion ring support 1013 of the pump body sealing structure 100 and the nut 22, so as to ensure that the seat 1 and the insertion ring support 1013 are locked securely.

[0065] Combination Figure 4 , Figure 4 A simplified top view of the base of the pressure testing device.

[0066] In some embodiments, the liquid inlet 13, the vent 12, and the through hole 16 are located on the outside of the receiving cavity 11. Multiple through holes 16 can be provided on the seat body 1. Multiple through holes 16 are arranged circumferentially along the receiving cavity 11, so that the seat body 1 has multiple positions for fasteners 2 to pass through, and the insertion ring support seat 1013 is adapted to various pump body sealing structures 100.

[0067] An embodiment of the present invention also provides a pressure-bearing testing method, which uses the above-mentioned pressure-bearing testing device to test the pressure-bearing capacity of the pressure-bearing section in the pump body sealing structure 100. The pressure-bearing testing method includes the following steps:

[0068] The seat 1, the insertion ring 101 and the insertion ring support 1013 are fastened together by fasteners 2 so that the cavity wall of the receiving cavity 11, the insertion ring 101 and the insertion ring support 1013 surround and form a pressure-bearing cavity 300 that communicates with the liquid inlet hole 13 and the vent hole 12.

[0069] Specifically, the seat 1 can be aligned with the insert ring support 1013 first, then the stud 21 can be passed through the seat 1 and the insert ring support 1013, and the seat 1 and the insert ring support 1013 can be locked together by rotating the nut 22 along the axial direction of the stud 21. It is easy to understand that the insert ring support 1013 can be connected to the second part 1015 of the insert ring 101 in advance by bolts.

[0070] Open the vent 12 and inject liquid into the pressure chamber 300 using the injection pump until liquid flows out of the vent 12.

[0071] Seal the vent hole 12 with a plug.

[0072] Continue to inject liquid into the pressure chamber 300 using the injection pump to determine whether there is any liquid leakage from the pressure chamber 300.

[0073] The pressure testing method of this application embodiment can use a pressure testing device to verify the pressure-bearing capacity of the pressure-bearing section, namely the insertion ring 101 and the insertion ring support 1013, in the pump body sealing structure 100. The operation is simple and convenient.

[0074] In some embodiments, before opening the vent 12, the outlet end of the injection pump is connected to the inlet 13, and then the injection pump injects liquid into the pressure chamber 300 after the vent 12 is opened.

[0075] In some embodiments, before sealing the vent hole 12 with the plug, it is necessary to observe air bubbles emerging from the vent hole 12. These air bubbles are the air in the pressure chamber 300 before liquid injection. After the air bubbles are cleared and liquid is observed to be discharged from the vent hole 12, the vent hole 12 is sealed with the plug.

[0076] In some embodiments, liquid is continuously injected into the pressure chamber 300 using an injection pump, and it is determined whether there is liquid leakage from the pressure chamber 300, including the following steps:

[0077] The injection pump continues to inject liquid into the pressure chamber 300. While injecting liquid, observe the reading on the pressure gauge on the injection pump.

[0078] When the pressure gauge reading reaches the water pressure test pressure value, stop the injection. This can be achieved by closing the valve on the injection pump.

[0079] After maintaining the preset time, check whether there is liquid leakage from the pressure chamber 300. If there is, it indicates that the insertion ring 101 or the insertion ring support 1013 has deformed, resulting in sealing failure and failure to meet the pressure requirements; if there is no leakage, it indicates that the insertion ring 101 and the insertion ring support 1013 meet the pressure requirements, the structure is reasonable, and the material performance meets the standards.

[0080] In some embodiments, after the test is completed, the valve of the injection pump is opened to depressurize the pressure chamber 300. Once the pressure in the pressure chamber has decreased to a safe range, the seat 1 is disassembled from the insertion ring support 1013, and the insertion ring support 1013 and insertion ring 101 are also disassembled. If leakage is present, the damaged area can be inspected and identified.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A pressure-bearing testing device for testing the pressure-bearing capacity of a pressure-bearing section in a pump body sealing structure (100), the pump body sealing structure (100) comprising an insertion ring (101) and an insertion ring support (1013) connected to the insertion ring (101), characterized in that, The pressure testing device includes: The seat (1) is provided with a through cavity (11) and an exhaust port (12) and an inlet port (13) respectively connected to the cavity (11). The cavity (11) is a stepped cavity used to accommodate the insertion ring (101) and the insertion ring support seat (1013). The plug is detachably installed in the vent (12); Fastener (2) is installed on the seat (1), and the seat (1) is fastened to the insertion ring support (1013) by the fastener (2) so that the cavity wall of the receiving cavity (11), the insertion ring (101) and the insertion ring support (1013) form a pressure-bearing cavity (300) communicating with the liquid inlet (13) and the vent (12); A liquid injection pump, connected to the liquid inlet (13), is used to pump liquid into the pressure chamber (300); The receiving cavity (11) includes a first cavity (111) and a second cavity (112) connected along the axial direction. The width of the first cavity (111) is greater than the width of the second cavity (112). The liquid inlet (13) and the vent (12) are respectively connected to the first cavity (111). The insertion ring (101) includes a first part (1014) accommodated in the side wall of the second cavity (112) and a second part (1015) accommodated in the first cavity (111). The radially outer side of the first part (1014) of the insertion ring (101) is tightly fitted with the inner wall of the second cavity (112). The insertion ring support (1013) includes a third part (1016) accommodated in the first cavity (111). The insertion ring (101) is stepped, comprising a first part (1014) with a smaller outer diameter and a second part (1015) with a larger outer diameter. By setting first cavities (111) and second cavities (112) of different widths to match the structural shapes of the insertion ring (101) and the insertion ring support (1013) in the pump body sealing structure (100), the first part (1014) of the insertion ring (101) is housed in the second cavity (112), the second part (1015) of the insertion ring (101) is housed in the first cavity (111), and the third part (1016) of the insertion ring support (1013) is housed in the first cavity (111). The radial outer side of the first part (1014) of the insertion ring (101) is tightly fitted with the inner wall of the second cavity (112); there is a gap between the second part (1015) of the insertion ring (101) and the cavity wall of the first cavity (111) so that after the seat (1) and the insertion ring support (1013) are assembled, the cavity wall of the first cavity (111) of the receiving cavity (11), the second part (1015) and the first part (1014) of the insertion ring (101) housed in the receiving cavity (11), and the third part (1016) of the insertion ring support (1013) form a pressure-bearing cavity (300) communicating with the liquid inlet (13) and the vent (12).

2. The pressure testing device according to claim 1, characterized in that, The second cavity (112) has a groove (1121) on its cavity wall. The groove (1121) extends circumferentially along the seat (1) and is used to accommodate the first seal.

3. The pressure testing device according to claim 1, characterized in that, The seat (1) is provided with a guide hole (14) opened along the axial direction, and the insertion ring support seat (1013) is provided with a guide post (17) corresponding to the guide hole (14).

4. The pressure testing device according to claim 1, characterized in that, The liquid inlet (13) is a first stepped hole, which includes a first inner diameter section (131), a second inner diameter section (132) and a third inner diameter section (133) connected in sequence with decreasing inner diameters. The first inner diameter section (131) is connected to the outer surface of the seat (1), and the third inner diameter section (133) is connected to the receiving cavity (11).

5. The pressure testing device according to claim 1, characterized in that, The exhaust port (12) is a second stepped hole, which includes a fourth inner diameter section (121), a fifth inner diameter section (122) and a sixth inner diameter section (123) connected in sequence with decreasing inner diameters. The fourth inner diameter section (121) is connected to the outer surface of the seat (1) and the sixth inner diameter section (123) is connected to the receiving cavity (11).

6. The pressure testing device according to claim 5, characterized in that, A sealing ring is provided in the fourth inner diameter section (121), and the plug portion abuts against the sealing ring.

7. The pressure testing device according to any one of claims 1-6, characterized in that, The seat (1) is provided with a second sealing element (15). When the seat (1) is fastened to the insertion ring support (1013), the second sealing element (15) is sandwiched between the seat (1) and the insertion ring support (1013).

8. The pressure testing device according to any one of claims 1-6, characterized in that, The fastener (2) includes a stud (21) and a nut (22). The base (1) is provided with a through hole (16) for the stud (21) to pass through. Both ends of the stud (21) pass through the through hole (16) and are respectively fitted with the nut (22).

9. A pressure testing method, characterized in that, The pressure-bearing capacity of the pressure-bearing section in the pump body sealing structure (100) is tested using the pressure-bearing testing device as described in any one of claims 1-8. The pump body sealing structure (100) includes an insert ring (101) and an insert ring support (1013) connected to the insert ring (101), comprising the steps of: The seat (1), the insertion ring (101) and the insertion ring support (1013) are fastened together by fasteners (2) so that the cavity wall of the receiving cavity (11), the insertion ring (101) and the insertion ring support (1013) surround and form a pressure-bearing cavity (300) communicating with the liquid inlet (13) and the vent (12); Open the vent (12) and inject liquid into the pressure chamber (300) using the injection pump; Seal the vent hole (12) with a plug; Liquid is continuously injected into the pressure chamber (300) by the injection pump to determine whether there is liquid leakage from the pressure chamber (300).

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