Valve core and valve seat sealing performance detection tool

Abstract

The utility model belongs to the technical field of sealing performance detection, and discloses a valve core and valve seat sealing performance detection tool, which comprises a sealing barrel, a sealing cover, a leakage detection structure and a plurality of first elastic pieces, any first elastic piece can be selected, one end of the first elastic piece can abut against the sealing cover, the other end of the first elastic piece is used for abutting against the valve seat, a first sub-cavity is defined by the valve element and the barrel bottom, the injection port communicates with the first sub-cavity, and the leakage detection structure is used for detecting the leakage condition between the valve element and the valve seat in real time. According to the valve core and valve seat sealing performance detection tool provided by the utility model, the first elastic pieces with different elastic coefficients are replaced, the sealing performance between the valve core and the valve seat under different pressure effects can be detected by using the leakage detection structure, and potential sealing problems can be found and solved in advance; therefore, the safety and the stability of the whole system in actual operation are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing performance detection technical field especially relates to valve core and valve seat sealing performance detection frock. BACKGROUND

[0002] In the key industrial field such as nuclear power station, the sealing performance of valve is the important factor to ensure the safe and stable operation of system. As the key component in fluid control system, the sealing performance of valve is directly related to the leakage of medium, and further influences the operation efficiency and safety of whole system. The contact surface of valve core and valve seat appears weak link due to machining error or friction in use process, and the weak link is directly opposite the valve hole on valve seat in use process, so the pressure in valve core is big, which can cause the leakage phenomenon in weak link, thereby influencing the sealing performance of whole valve.

[0003] In prior art, the leakage state between valve core and valve seat is generally observed by naked eye. The sealing performance of assembled valve is detected, and if the sealing performance is unqualified, the valve core and valve seat need to be disassembled, which reduces the work efficiency and even damages the parts. Therefore, according to production requirement, the sealing performance of valve core and valve seat needs to be detected before use or after maintenance. UTILITY MODEL CONTENT

[0004] The utility model discloses a valve core and valve seat sealing performance detection frock, can find and solve potential sealing problem in advance, improve the safety and stability of system.

[0005] In order to achieve the purpose, the utility model adopts the following technical scheme:

[0006] Valve core and valve seat sealing performance detection frock, including:

[0007] Sealing barrel, the barrel bottom of sealing barrel can fix valve core;

[0008] Sealing cover, the sealing cover is located at the opening end of the sealing barrel, and the sealing cover is detachably sealed and connected to the sealing barrel, and the sealing cover blocks the opening of the sealing barrel to form a sealed chamber between the sealing barrel and the sealing cover, and the sealing barrel is provided with an injection port;

[0009] A plurality of first elastic members, a plurality of first elastic members have different elastic coefficients, and any first elastic member can be selected so that one end of the first elastic member can abut against the sealing cover, and the other end is used for abutting against the valve seat, so that the valve hole of the valve seat is blocked by the valve core, and the valve core divides the sealed chamber into a first sub-chamber and a second sub-chamber, and the valve core and the barrel bottom form the first sub-chamber, and the injection port is in communication with the first sub-chamber;

[0010] A leakage detection structure is configured to detect a leakage between the valve core and the valve seat in real time.

[0011] Optionally, the leakage detection structure comprises:

[0012] A pressure detection device is configured to detect a pressure change in the first sub-chamber.

[0013] Optionally, an observation window is arranged on the sealing cover, and the observation window is configured to observe the leakage between the valve core and the valve seat.

[0014] Optionally, an upper end of the sealing barrel is axially inserted into the sealing cover, and a first sealing member is arranged between the sealing barrel and the sealing cover.

[0015] Optionally, the sealing barrel comprises a barrel body, a lower end of the barrel body is axially inserted into the barrel bottom, and a second sealing member is arranged between the barrel body and the barrel bottom.

[0016] Optionally, the sealing barrel is an integral structure.

[0017] Optionally, the valve core and valve seat sealing performance detection tool further comprises:

[0018] A press machine is configured to drive the sealing cover to axially move along the sealing barrel, so as to selectively seal or separate the sealing cover from the sealing barrel.

[0019] A load sensor is arranged between the sealing barrel and the sealing cover, and is configured to detect an axial force applied by the sealing cover to the sealing barrel.

[0020] Optionally, an avoiding groove is arranged at an end of the sealing cover facing the barrel bottom, and is configured to avoid a protruding structure on the valve seat, an outer peripheral wall of the protruding structure is sleeved with a third sealing member, and the third sealing member is arranged on a groove wall of the avoiding groove capable of contacting the protruding structure.

[0021] Optionally, the barrel bottom is provided with a mounting groove extending along an axial direction of the sealing barrel, and the mounting groove is configured to insert a fixed end of the valve core.

[0022] Optionally, a through hole is arranged on a groove bottom wall of the mounting groove and penetrates to an outer bottom wall of the sealing barrel, and a bolt is configured to be threadedly connected to the valve core after penetrating through the through hole.

[0023] Optionally, the barrel bottom is provided with a limiting surface, and the valve core is capable of abutting against the limiting surface along an axial direction of the sealing barrel.

[0024] Optionally, the valve core and valve seat sealing performance detection tool further comprises a medium filling device, an inlet end of the medium filling device is in communication with a medium source, an outlet end of the medium filling device is in communication with an inlet end of the injection port, and the inlet end or the outlet end of the medium filling device is provided with an on-off valve.

[0025] The utility model discloses beneficial effect has:

[0026] The utility model discloses a valve core and valve seat sealing performance detection tool, the sealing cover is sealed the opening of the sealed barrel, and the sealed barrel and the sealing cover are surrounded to form a sealed chamber between, the first elastic piece is arranged between the sealing cover and the sealed barrel, and one end is abutted to the sealing cover, and the other end is used for abutting the valve seat, the first elastic piece is pressed tightly by moving the sealing cover, the first elastic piece is pressed tightly the valve seat, and the valve core is pressed tightly, the valve hole of the valve seat is sealed by the valve core, the valve core divides the sealed chamber into first subchamber and second subchamber, and the valve core and the barrel bottom form the first subchamber, the injection port is communicated with the first subchamber, and the medium is filled into the first subchamber through the injection port, and the leakage detection structure can detect the leakage between the valve core and the valve hole in real time. By changing the first elastic piece of different elastic coefficient, the leakage detection structure can detect the sealing performance between the valve core and the valve seat under the action of different pressure, can find and solve potential sealing problem in advance, to improve the security and stability of whole system in actual operation. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the structure schematic diagram of valve core and valve seat sealing performance detection tool provided by the utility model embodiment;

[0028] Figure 2 It is the sectional view of valve core and valve seat sealing performance detection tool provided by the utility model embodiment;

[0029] Figure 3 It is the total schematic diagram of valve core and valve seat sealing performance detection tool provided by the utility model embodiment.

[0030] In the drawing: 101, sealed barrel;1011, barrel body;1012, barrel bottom;1013, injection port;1014, first subchamber;1015, second subchamber;102, sealing cover;1021, observation window;103, first elastic piece;104, valve seat;1041, valve hole;105, valve core;106, bolt;107, first sealing piece;108, second sealing piece;109, third sealing piece;110, press;111, pressure detector;112, load detection device;113, control device;114, test bench. DETAILED DESCRIPTION

[0031] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0032] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0035] As Figures 1-3The utility model discloses an embodiment provides a valve core and valve seat sealing performance detection frock, including sealed bucket 101, sealing cover 102, leakage detection structure and a plurality of first elastic piece 103, the bucket bottom 1012 of sealed bucket 101 can fix valve core 105, sealing cover 102 is located sealed bucket 101's open end, sealing cover 102 detachably sealed connection is in sealed bucket 101, sealing cover 102 blocks the opening of sealed bucket 101 to make sealed cavity between sealed bucket 101 and sealing cover 102, sealed bucket 101 is equipped with injection port 1013, a plurality of first elastic piece 103 has different elastic coefficients, can select any first elastic piece 103 to make its one end can abut to sealing cover 102, the other end is used for abutting to valve seat 104, make valve hole 1041 of valve seat 104 be blocked by valve core 105, valve core 105 will sealed cavity divide into first subchamber 1014 and second subchamber 1015, valve core 105 and bucket bottom 1012 enclose first subchamber 1014, injection port 1013 is communicated with first subchamber 1014, and leakage detection structure is used for real -time detection between valve core 105 and valve seat 104 leakage situation.

[0036] By blocking the opening of sealed bucket 101 with sealing cover 102, a sealed cavity is formed between sealed bucket 101 and sealing cover 102, first elastic piece 103 is arranged between sealing cover 102 and sealed bucket 101, one end of first elastic piece 103 abuts against sealing cover 102, and the other end of first elastic piece 103 is used for abutting against valve seat 104, sealing cover 102 is detachably sealed and connected to sealed bucket 101, so that valve core 105 can be fixed to bucket bottom 1012, sealing cover 102 is moved to press first elastic piece 103 tightly, first elastic piece 103 presses valve seat 104 tightly, valve seat 104 presses valve core 105 tightly, valve hole 1041 of valve seat 104 is blocked by valve core 105, valve core 105 divides the sealed cavity into first subchamber 1014 and second subchamber 1015, valve core 105 and bucket bottom 1012 enclose first subchamber 1014, injection port 1013 is communicated with first subchamber 1014, medium is filled into first subchamber 1014 through injection port 1013, and leakage detection structure can be used to detect the leakage between valve core 105 and valve hole 1041 in real time. By replacing first elastic piece 103 with different elastic coefficients, the sealing performance between valve core 105 and valve seat 104 under different pressures can be detected by using the leakage detection structure, potential sealing problems can be found and solved in advance, and the safety and stability of the entire system in actual operation can be improved.

[0037] Exemplarily, first elastic piece 103 is a disc spring. In other embodiments, first elastic piece 103 can also be a compression spring. It should be noted that the elastic coefficient of first elastic piece 103 is related to parameters such as the size, material and effective number of turns of first elastic piece 103.

[0038] Furthermore, the leakage detection structure includes an observation window 1021, which is located on the sealing cover 102 and is used to observe the leakage between the valve core 105 and the valve seat 104.

[0039] like Figure 2 As shown, the sealing cover 102 is provided with an observation window 1021. The projection of the observation window 1021 on the axial direction of the sealing cover 102 is the first projection, and the projection of the valve hole 1041 on the axial direction of the sealing cover 102 is the second projection. The second projection is located inside the first projection. The valve hole 1041 is exposed through the observation window 1021, which allows the operator to observe whether there is any media leakage between the valve core 105 and the valve seat 104.

[0040] In other embodiments, the leakage detection structure includes a pressure detection device that monitors pressure changes within the first sub-chamber 1014 in real time. A medium is injected into the first sub-chamber 1014 through the injection port 1013, and the pressure changes within the first sub-chamber 1014 are monitored in real time during the pressure holding process. If the pressure value within the first sub-chamber 1014 remains within a specified range, the sealing performance between the valve core 105 and the valve seat 104 is considered good.

[0041] Preferably, an observation window 1021 and a pressure detection device are provided simultaneously. The pressure detection device can detect pressure changes within the first sub-chamber 1014. If, after a period of pressure maintenance, the pressure value within the first sub-chamber 1014 decreases and falls below a specified range, leakage may occur at the contact surface between the valve core 105 and the valve seat 104, or there may be a risk of leakage at the contact surface between the valve core 105 and the bottom of the tank 1012. In this case, the operator needs to carefully observe through the observation window 1021 whether there is any media leakage between the valve core 105 and the valve hole 1041. If the operator does not find any media leakage, there is leakage at the contact surface between the valve core 105 and the bottom of the tank 1012, and the sealing performance between the valve core 105 and the valve seat 104 is good; if the operator finds media leakage, the sealing performance between the valve core 105 and the valve seat 104 is unqualified.

[0042] Furthermore, such as Figure 2 As shown, the end of the sealing cap 102 facing the bottom of the barrel 1012 is provided with a relief groove to avoid the protruding structure on the valve seat 104. The outer peripheral wall of the protruding structure is fitted with a third sealing element 109, which is located in the relief groove and can contact the groove wall of the protruding structure.

[0043] The convex structure of the valve seat 104 can be inserted into the avoiding groove on the sealing cover 102, so that the sealing cover 102 will not contact the convex structure of the valve seat 104 in the avoiding groove when the sealing cover 102 is pressed against the sealing barrel 101, avoiding the sealing cover 102 directly pressing against the valve seat 104 and causing damage to the valve seat 104, thereby affecting the service life of the valve seat 104. The third sealing member 109 is arranged on the groove wall of the avoiding groove that can contact the convex structure, which can ensure that the sealing performance of the contact position between the sealing cover 102 and the convex structure is good and no leakage occurs, preventing the medium in the first sub-chamber 1014 from leaking into the second sub-chamber 1015 through the valve hole 1041 of the valve seat 104.

[0044] Exemplarily, the valve seat 104 is in the shape of a convex letter, and the convex structure is located in the avoiding groove. The annular flange of the valve seat 104 is pressed against the sealing cover 102 through the first elastic member 103, and the first elastic member 103 can provide a counteracting force to the sealing cover 102, reducing the force of the sealing cover 102 directly acting on the valve seat 104 and reducing the damage to the valve seat 104.

[0045] Preferably, the third sealing member 109 is a sealing ring.

[0046] Further, the upper end of the sealing barrel 101 is axially inserted into the sealing cover 102, and the first sealing member 107 is arranged between the sealing barrel 101 and the sealing cover 102.

[0047] The upper end of the sealing barrel 101 is inserted into the sealing cover 102, which is simple in structure and convenient to process. The first sealing member 107 is arranged at the insertion position to prevent the leaked medium in the first sub-chamber 1014 from flowing out from the insertion position of the first sealing member 107 after entering the second sub-chamber 1015, thereby affecting the cleanliness of the working area.

[0048] Further, the sealing barrel 101 includes a barrel body 1011, and the lower end of the barrel body 1011 is axially inserted into a barrel bottom 1012. The second sealing member 108 is arranged between the barrel body 1011 and the barrel bottom 1012.

[0049] The lower end of the barrel body 1011 is inserted into the barrel bottom 1012, which is simple in structure and convenient to process. The second sealing member 108 is arranged at the insertion position to prevent the leaked medium in the first sub-chamber 1014 from flowing out from the insertion position of the lower end of the barrel body 1011 after entering the second sub-chamber 1015, thereby affecting the cleanliness of the working area.

[0050] In other embodiments, the sealing barrel 101 is an integrally formed structure, which greatly improves the sealing performance of the sealing barrel 101.

[0051] It should be noted that the sealing member is arranged at the contact position of the sealing barrel 101 and the sealing cover 102, the bottom 1012 of the barrel, and the contact position of the sealing cover 102 and the valve seat 104, so that the medium in the first sub-chamber 1014 cannot flow out after entering the second sub-chamber 1015.

[0052] Further, the bottom 1012 of the barrel is provided with a mounting groove extending along the axial direction of the sealing barrel 101, and the fixed end of the valve core 105 is inserted into the mounting groove.

[0053] The valve core 105 is inserted into the mounting groove, so that the valve core 105 is fixed and is not easy to deviate. When the sealing cover 102 is moved to press the first elastic member 103, the first elastic member 103 presses the valve seat 104, the valve seat 104 presses the valve core 105, and the valve core 105 can completely block the valve hole 1041 on the valve seat 104, so that the sealing performance between the valve core 105 and the valve seat 104 can be detected.

[0054] Further, the inner peripheral wall of the mounting groove is provided with a fourth sealing member located in the valve core 105. The fourth sealing member is clamped between the inner peripheral wall of the fixed end of the valve core 105 and the mounting groove, so that the sealing performance between the valve core 105 and the mounting groove can be improved, the medium in the first sub-chamber 1014 cannot enter the second sub-chamber 1015 through the mounting groove and the fixed end of the valve core 105, and the pressure change in the first sub-chamber 1014 will not be affected.

[0055] Exemplarily, the fourth sealing member is a sealing sleeve.

[0056] Further, the bottom 1012 of the barrel is provided with a limiting surface, and the valve core 105 can abut against the limiting surface along the axial direction of the sealing barrel 101. The limiting surface limits the valve core 105, so that the valve core 105 will not move along the axial direction of the sealing barrel 101 during the extrusion of the valve seat 104.

[0057] Exemplarily, the outer peripheral wall of the valve core 105 is provided with a protrusion, and the protrusion abuts against the limiting surface of the bottom 1012 of the barrel, so that the valve core 105 will not move during the extrusion process.

[0058] Further, the bottom wall of the mounting groove is provided with a through hole penetrating through the outer bottom wall of the sealing barrel 101, and the bolt 106 is threadedly connected to the valve core 105 through the through hole.

[0059] The valve core 105 is more fixedly connected to the barrel bottom 1012 by the bolt 106, which is threaded to the valve core 105, on the one hand, the position of the valve core 105 will not be deviated when the valve seat 104 is pressed against the valve core 105, which can improve the reliability of the sealing performance detection result between the valve core 105 and the valve seat 104; on the other hand, after the medium is filled into the first sub-chamber 1014 through the injection port 1013, the pressure in the first sub-chamber 1014 increases, which can prevent the fixed end of the valve core 105 from being separated from the installation groove due to excessive pressure in the first sub-chamber 1014.

[0060] Exemplarily, a sealing gasket is arranged between the nut and the outer wall of the barrel bottom 1012, which can improve the sealing performance between the bolt 106 and the barrel bottom 1012.

[0061] It should be noted that the valve core 105 is a special valve core, which has a threaded hole that is not communicated with the sealing chamber and does not interfere with the actual detection result, and can exclude the air tightness problem caused by the threaded hole.

[0062] Further, the valve core and valve seat sealing performance detection tool further comprises a press 110 and a load sensor, the press 110 can drive the sealing cover 102 to move axially along the sealing barrel 101, so that the sealing cover 102 is selectively sealed and connected to the sealing barrel 101 or separated from the sealing barrel 101; the load sensor is arranged between the sealing barrel 101 and the sealing cover 102, and is used to detect the force applied by the sealing cover 102 to the sealing barrel 101 along the sealing barrel 101.

[0063] The load sensor is arranged at the position where the upper end surface of the sealing barrel 101 contacts with the sealing cover 102, when the press 110 drives the sealing cover 102 to move axially along the sealing barrel 101, the load sensor can detect the force applied by the press 110 in real time, which is convenient for the operator to control the press 110 at any time to detect the sealing performance between the valve core 105 and the valve seat 104 under different pressures. It should be noted that when the load sensor is arranged at the position where the upper end surface of the sealing barrel 101 contacts with the sealing cover 102, the first sealing member 107 should be arranged on the inner or outer peripheral wall of the sealing barrel 101 to avoid interference between the first sealing member 107 and the load sensor, which can cause poor sealing and cause the medium leaked from the first sub-chamber 1014 to flow out from the position where the upper end surface of the sealing barrel 101 contacts with the sealing cover 102 after entering the second sub-chamber 1015.

[0064] Exemplarily, the press 110 drives the sealing cover 102 to move by a pneumatic cylinder.

[0065] Further, the inner circumferential wall and the outer circumferential wall of the sealing barrel 101 are each provided with an annular groove, and each annular groove is provided with a first sealing element 107. The first sealing element 107 arranged in the annular groove of the inner circumferential wall is clamped between the inner circumferential wall of the sealing cover 102 and the inner circumferential wall of the sealing barrel 101. The first sealing element 107 arranged in the annular groove of the outer circumferential wall is clamped between the inner circumferential wall of the sealing cover 102 and the outer circumferential wall of the sealing barrel 101.

[0066] Further, the valve core and valve seat sealing performance detection tool further comprises a medium filling device. The inlet end of the medium filling device is in communication with the medium source. The outlet end of the medium filling device is in communication with the inlet end of the injection port 1013 through the medium filling pipeline. The inlet end or the outlet end of the medium filling device is provided with an on-off valve.

[0067] Specifically, the medium filling device can be a water pump or an air compressor.

[0068] When it is necessary to detect the sealing performance between the valve core 105 and the valve seat 104, the on-off valve is opened, the medium filling device is started, and the medium is filled into the injection port 1013. The medium enters the first sub-chamber 1014 through the injection port 1013. After the medium is filled to a certain pressure or for a certain time, the on-off valve is closed to stop filling the medium. The medium is pressure maintained in the first sub-chamber 1014. The pressure change in the first sub-chamber 1014 is monitored in real time through the pressure detection device, and the leakage between the valve core 105 and the valve seat 104 is observed through the observation window 1021. For example, the medium is water, which is convenient for the staff to observe whether there is water leakage between the valve core 105 and the valve seat 104 through the observation window 1021. In other embodiments, the medium can also be air.

[0069] Further, the valve core and valve seat sealing performance detection tool further comprises a pressure relief valve. The inlet end of the pressure relief valve is in communication with the medium filling pipeline. The outlet end of the pressure relief valve is in communication with the atmosphere.

[0070] After the sealing detection is completed, the medium in the first sub-chamber 1014 needs to be depressurized. The pressure relief valve is opened. Since the outlet end of the pressure relief valve is in communication with the atmosphere, the pressure in the first sub-chamber 1014 is lower than the pressure in the first sub-chamber 1014. The high-pressure medium in the first sub-chamber 1014 is gradually discharged through the outlet end of the pressure relief valve, so that the pressure in the first sub-chamber 1014 is gradually reduced.

[0071] For example, the pressure relief valve is an on-off valve.

[0072] Further, the sealing barrel 101 and the sealing cover 102 are made of stainless steel, which has the advantages of corrosion resistance, durability, high strength, etc. and can be repeatedly used to save costs.

[0073] For example, the sealing barrel 101 and the sealing cover 102 are made of stainless steel, which has the advantages of corrosion resistance, durability, high strength, etc. and can be repeatedly used to save costs. Figure 3As shown, the valve core and valve seat sealing performance detection tool further comprises a control device 113, a test table 114, a pressure detector 111, a load detection device 112 and a support seat, the load detection device 112 is placed on the support seat, the test table 114 is located above the load detection device 112, the sealing barrel 101 and the sealing cover 102 are clamped between the press 110 and the test table 114, the pressure detector 111 is installed on the press 110, and the control device 113 is electrically connected with the test table 114 and the press 110. The pressure detector 111 is used for monitoring the sealing performance of the second sub-chamber 1015 in real time, and the load detection device 112 is used for monitoring the stress of the sealing cover 102 and the sealing barrel 101 in the test process in real time.

[0074] It should be noted that if the sealing effect between the valve core 105 and the valve seat 104 fails, the pressure in the first sub-chamber 1014 decreases, at which time the medium filling device continues to fill the medium into the first sub-chamber 1014, so that the load in the sealing chamber increases, thereby causing the value of the load detection device 112 to change. Then, whether the leakage phenomenon occurs between the valve core 105 and the valve seat 104 is detected by the above detection method.

[0075] The sealing barrel 101 and the sealing cover 102 with the valve core 105 and the valve seat 104 installed are placed on the test table 114, the press 110 is driven by the control device 113 to move along the axial direction of the sealing barrel 101, the press 110 presses the sealing cover 102, the sealing cover 102 presses the first elastic member 103, the first elastic member 103 presses the valve seat 104, and the valve seat 104 presses the valve core 105, so that the valve hole 1041 of the valve seat 104 is blocked by the valve core 105. After the medium is injected into the first sub-chamber 1014, pressure maintaining is performed, whether the pressure detector and the load detection device 112 change is observed, if the change occurs, the leakage state between the valve core 105 and the valve seat 104 is observed through the observation window 1021, so as to detect the sealing performance of the valve core 105 and the valve seat 104.

[0076] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A valve core and valve seat sealing performance detection tool, characterized in that, The utility model relates to a valve core and valve seat sealing performance detection tool, including: Sealing barrel (101), the bottom (1012) of sealing barrel (101) can fix valve core (105); Sealing cover (102), sealing cover (102) is located the open end of sealing barrel (101), sealing cover (102) is detachably sealed and is connected to sealing barrel (101), sealing cover (102) blocks the opening of sealing barrel (101) to form a sealed chamber between sealing barrel (101) and sealing cover (102), sealing barrel (101) is equipped with injection port (1013); Multiple first elastic members (103), multiple first elastic members (103) have different elastic coefficients, and any first elastic member (103) can be selected to have one end abutting against sealing cover (102) and the other end abutting against valve seat (104), so that the valve hole (41) of valve seat (104) is blocked by valve core (105), valve core (105) divides the sealed chamber into first subchamber (1014) and second subchamber (1015), valve core (105) and bottom (1012) form first subchamber (1014), and injection port (1013) communicates with first subchamber (1014); Leakage detection structure for real-time detection of leakage between valve core (105) and valve seat (104).

2. The spool and seat seal performance testing tooling of claim 1, wherein, The leakage detection structure includes: Pressure detection device for detecting pressure change in first subchamber (1014); And / or, observation window (1021), observation window (1021) is arranged on sealing cover (102), and observation window (1021) is used for observing the leakage between valve core (105) and valve seat (104).

3. The spool and seat seal performance testing tooling of claim 1, wherein, The upper end of sealing barrel (101) is axially inserted into sealing cover (102), and first sealing member (107) is arranged between sealing barrel (101) and sealing cover (102).

4. The spool and seat seal performance testing tooling of claim 1, wherein, The sealing barrel (101) includes a barrel body (1011), the lower end of the barrel body (1011) is axially inserted into the bottom (1012), and a second sealing member (108) is arranged between the barrel body (1011) and the bottom (1012); Or, the sealing barrel (101) is an integral structure.

5. The valve trim and seat seal performance testing tool of claim 1, wherein, The valve core and valve seat sealing performance detection tool further includes: Press (110), the press (110) can drive sealing cover (102) to move along the axial direction of sealing barrel (101), so that sealing cover (102) is selectively sealed and connected to sealing barrel (101) or separated from sealing barrel (101); Load sensor, load sensor is arranged between sealing barrel (101) and sealing cover (102), and is used for detecting the force applied by sealing cover (102) to sealing barrel (101) along the axial direction of sealing barrel (101).

6. The valve trim and seat seal performance testing tool of claim 1, wherein, The sealing cover (102) is provided with a avoiding slot at one end facing the barrel bottom (1012), which is used for avoiding the convex structure on the valve seat (104), the outer circumferential wall of the convex structure is sleeved with a third sealing element (109), and the third sealing element (109) is arranged on the slot wall of the avoiding slot which can contact the convex structure.

7. The spool and seat seal performance testing tooling of claim 1, wherein, The barrel bottom (1012) is provided with a mounting slot extending along the axial direction of the sealing barrel (101), and the fixed end of the valve core (105) is inserted into the mounting slot.

8. The spool and seat seal performance testing tooling of claim 7, wherein, The slot bottom wall of the mounting slot is provided with a through hole penetrating to the outer bottom wall of the sealing barrel (101), and a bolt (106) is threadedly connected to the valve core (105) after penetrating through the through hole.

9. The spool and seat seal performance testing tooling of any one of claims 1 to 8, wherein, The barrel bottom (1012) is provided with a limiting surface, and the valve core (105) can abut against the limiting surface along the axial direction of the sealing barrel (101).

10. The spool and seat seal performance testing tooling of any one of claims 1 to 8, wherein, The valve core and valve seat sealing performance detection tool further comprises a medium filling device, the inlet end of the medium filling device is in communication with a medium source, the outlet end of the medium filling device is in communication with the inlet end of the injection port (1013), and the inlet end or the outlet end of the medium filling device is provided with an on-off valve.

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