Check valve dismounting tool

Abstract

The utility model relates to the technical field of check valve disassembling and assembling tools, in particular to a check valve disassembling and assembling tool. The check valve disassembling and assembling tool comprises a connecting piece and a valve seat extractor hinged to one end of the connecting piece, the valve seat extractor is provided with a first end face which pushes a valve seat to deviate from the peripheral face of a valve ball so that the valve seat can be disengaged in the horizontal direction, and the valve seat extractor is provided with a gravity part. The valve seat extractor is provided with a stopping part which stops the valve seat extractor from rotating in a hinged mode relative to the connecting piece located at the horizontal position under the action of the gravity part, and a drawing mechanism is arranged on the side, away from the valve seat extractor, of the connecting piece. The stop part is arranged on the valve seat extractor, the valve seat extractor can enter the valve body from the access hole of the right-angle check valve in the horizontal direction, the valve seat extractor is pulled under the action of the pulling mechanism, the valve seat of the right-angle check valve can be detached on site, and the problem that the valve seat is difficult to detach is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of one-way valve disassembly and assembly tools, specifically to a one-way valve disassembly and assembly tool. Background Technology

[0002] During normal oil well production, the oil-water mixture inside the wellbore is pumped out into the surface gathering and transportation network by a pump. One-way valves are widely used in the wellhead gathering and transportation pipeline system to prevent backflow of the oil-water mixture. Chinese utility model patent CN222350926U, authorized on January 14, 2025, discloses a right-angle one-way valve, such as... Figure 1 As shown, the valve body 1 includes a valve body 1 with an equal diameter three-way structure, a valve ball 2 and a valve seat 3 disposed within the valve body 1. The valve body 1 has a horizontal inlet 8 and a vertical outlet 12. The central through hole of the inlet 8 is stepped. The valve seat 3 presses against the inner shoulder 801 of the central through hole of the inlet 8, away from the outer circumferential surface of the valve ball 2. The outer wall of the valve seat 3 is press-fitted to the inner wall of the valve body 1 through a sealing ring 9. A raceway assembly 61 is installed inside the valve body 1, which has an inclined valve ball raceway 6 to form a limiting guide rail 601. A pressure ring 5 is fixedly installed at the lower end of the valve ball raceway 6. The valve seat 3 is press-fitted into the valve body 1 through the pressure ring 5. A ball-stopping structure 7 is provided at the upper end of the valve ball raceway 6. The raceway assembly 61 has a connecting plate 15, which is assembled to the mounting step 17 of the valve body 1 by fasteners 18. The other end of the valve body 1, which is coaxial with the inlet 8, is the inspection port 10 of the check valve, which is sealed by a plug 4. The oil-water mixture produced by the oil well enters the inlet 8 of the check valve. Under the action of pressure and flow, it pushes the valve ball, which rolls upward along the valve ball raceway. The oil-water mixture flows out through the outlet 12 of the check valve. The outlet 12 is equipped with a ball baffle 13. When the pressure and flow are low, the valve ball rolls downward along the valve ball raceway to the valve seat by its own weight, closing the check valve to achieve the check valve effect.

[0003] The following problems arise during long-term use of right-angle check valves: First, the pumping unit performs 3000-6000 reciprocating movements daily, causing natural damage to the track, valve ball, and valve seat due to long-term friction and impact. Second, the presence of sand in the liquid causes wear and scale buildup on the sealing surfaces, reducing the valve's sealing performance. Therefore, specialized tools are needed to remove the track assembly, valve seat, and valve ball from the valve body for inspection, maintenance, and replacement, thus demonstrating the superiority of the inspectable track-type right-angle check valve.

[0004] However, in actual field applications, the right-angle check valve is horizontally connected to the wellhead pipeline by welding the inlet 8. The disassembly and assembly of the right-angle check valve and the wellhead pipeline is relatively complicated. It is necessary to disassemble and assemble the right-angle check valve on-site through the inspection port 10 for maintenance and replacement. The plug 4 can be opened through the inspection port 10, and the fastener 18 can be removed to take out the raceway assembly 61 along the horizontal axis of the valve body 1 from the inspection port 10. The valve ball 2 can also be taken out from the inspection port 10. However, the interference fit valve seat 3 cannot be easily disassembled, making maintenance and replacement work difficult. Summary of the Invention

[0005] This utility model provides a tool for disassembling and assembling a check valve, which solves the problem of difficult valve seat disassembly during on-site maintenance of right-angle check valves.

[0006] To solve the above-mentioned technical problems, the technical solution of the one-way valve disassembly and assembly tool of this utility model is as follows:

[0007] A tool for disassembling and assembling a one-way valve includes a connector and a valve seat extractor hinged to one end of the connector. The valve seat extractor has a first end face that pushes the valve seat away from the outer circumferential surface of the valve ball to allow the valve seat to disengage horizontally. The valve seat extractor has a gravity component for hinged rotation under gravity to make the first end face parallel to the outer circumferential surface of the valve seat away from the valve ball. The valve seat extractor has a stop component to prevent the valve seat extractor from hinged rotation relative to the horizontally positioned connector under gravity, and to make the maximum projected diameter of the valve seat extractor in the vertical plane smaller than the inner diameter of the valve seat. The side of the connector away from the valve seat extractor has a pulling mechanism for pulling the valve seat extractor to push the first end face away from the outer circumferential surface of the valve ball.

[0008] This utility model innovatively provides a tool for disassembling and assembling a check valve. By incorporating a stop part in the valve seat extractor to prevent it from hinged to a horizontally positioned connecting piece under gravity, and ensuring that the maximum projected diameter of the valve seat extractor in the vertical plane is smaller than the inner diameter of the valve seat, the tool allows for horizontal access to the valve body through the inspection port in a right-angle check valve when removing plugs, raceway assemblies, or valve balls. The valve seat extractor passes through the valve seat cavity and enters the inlet. Furthermore, it allows for the removal of the plug, raceway assembly, and valve ball in the check valve. The seat extractor is equipped with a gravity component. When the connecting piece is rotated along the circumference of the valve body, the gravity component of the seat extractor is no longer blocked. Under the action of gravity, the hinged rotation makes the first end face of the seat extractor parallel to the outer circumferential surface of the valve seat away from the valve ball. Then, under the action of the pulling mechanism, the seat extractor is pulled out. The first end face pushes the valve seat away from the outer circumferential surface of the valve ball, so that the valve seat is disassembled in the horizontal direction. This allows for on-site disassembly of the right-angle check valve seat, solving the problem of difficult valve seat disassembly, and enabling the right-angle check valve to be inspected and replaced.

[0009] Preferably, the valve seat extractor has an internal clearance space to allow for hinged rotation of the connecting parts.

[0010] Preferably, the valve seat extractor has a hollow structure with one end open, and the side wall of the valve seat extractor has a through groove extending to the opening. The side wall of the valve seat extractor located opposite to the through groove constitutes the stop portion. The plane of the valve seat extractor located at the through groove constitutes the first end face. The through groove, the one-end opening, and the hollow inner cavity of the hollow structure constitute the clearance space. The end of the valve seat extractor away from the opening constitutes the gravity portion.

[0011] Preferably, the two walls of the through groove are on the same plane, and the groove walls form the first end face.

[0012] Preferably, the valve seat extractor has a protrusion extending into the valve seat at the position of the first end face, and the two end faces of the protrusion are used to cooperate with the inner wall of the valve seat.

[0013] Preferably, the pulling mechanism has a magnetic component installed at the end away from the valve seat extractor.

[0014] Preferably, the pulling mechanism includes a sliding hammer that slides along the connector, and the end of the connector away from the valve seat extractor is provided with a stop to prevent the sliding hammer from sliding.

[0015] Preferably, the pulling mechanism has a valve seat mounting base installed at the end away from the valve seat extractor, and the valve seat mounting base has a second end face that pushes the valve seat close to the outer peripheral surface of the valve ball.

[0016] Preferably, the stop member has a second end face that pushes the valve seat close to the outer peripheral surface of the valve ball, and the stop member constitutes the valve seat mounting base.

[0017] Preferably, the valve seat mounting base includes a frustum portion whose diameter gradually increases along the direction close to the valve seat extractor, and the outer peripheral surface of the frustum portion forms the second end face. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a right-angle check valve;

[0019] Figure 2 This is a schematic diagram of the right-angle single-flow valve of this utility model in a pulled-out state, according to an embodiment of the present utility model.

[0020] Figure 3 for Figure 2 A schematic diagram of the valve seat extractor in the diagram;

[0021] Figure 4 for Figure 3 A cross-sectional view of the valve seat extractor on face AA;

[0022] In the attached drawings: 1001, valve seat extractor; 1011, first sidewall; 1012, first pin hole; 1013, bottom wall; 1014, wall thickness section; 1141, protrusion; 1015, second sidewall; 1002, cylindrical groove; 1003, connecting rod; 1004, sliding hammer; 1005, rubber sleeve; 1006, valve seat mounting base; 1007, magnetic disc; 1008, second pin hole; 100 9. Hinge section; 1010. Threaded connection section; 1. Valve body; 2. Valve ball; 3. Valve seat; 4. Plug; 5. Pressure ring; 6. Valve ball raceway; 601. Limit guide rail; 7. Ball retainer structure; 8. Inlet; 801. Inner shoulder; 9. Sealing ring; 10. Inspection port; 11. Outer circumference of valve seat; 12. Outlet; 13. Ball retainer body; 15. Connecting disc; 17. Mounting step; 18. Fastener; 61. Raceway assembly. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0024] The technical concept of the one-way valve disassembly and assembly tool provided by this utility model is as follows:

[0025] In actual field use, the inlet of the right-angle check valve is horizontally connected to the wellhead pipeline by welding. Disassembly and assembly are complex and cumbersome. The right-angle check valve needs to be inspected and replaced horizontally through the inspection port. Existing valve seat removal tools, such as the water injection pump valve extractor disclosed in utility model patent CN201012486Y, pull the valve out by engaging the screw outer wall with the water injection pump body thread. The valve seat removal tool for fracturing truck plunger pump disclosed in utility model patent CN219275725U has a movable part in the puller. During the downward movement in the through hole of the valve seat, it is blocked by the inner circumferential surface of the through hole. After moving to the bottom of the valve seat, it rotates outward by its own weight to block the bottom surface of the valve seat, and then the valve seat is vertically pulled out.

[0026] However, due to sealing requirements, the valve seat of a right-angle check valve cannot be fitted with an internal thread that mates with the screw of the puller, and the valve seat needs to be pulled out horizontally. Neither of the two aforementioned pull-out tools is suitable for pulling out the valve seat of a right-angle check valve. This invention utilizes the gravity of the valve seat extractor to prevent it from passing horizontally through the valve seat cavity. After passing through the valve seat through-hole, it hinges and rotates under gravity, allowing the end face of the valve seat extractor to push against the outer circumference of the valve seat. This enables on-site disassembly of the valve seat of the right-angle check valve, and the method is simple to use.

[0027] Based on the above inventive concept, such as Figure 2-4As shown, the single-flow valve disassembly and assembly tool of this utility model includes a connector and a valve seat extractor 1001 hinged to one end of the connector. The valve seat extractor 1001 has a wall thickness section 1014 that pushes the outer peripheral surface 11 of the valve seat to make the valve seat detach in the horizontal direction. The valve seat extractor 1001 has a gravity part for the valve seat extractor 1001 to hinge and rotate under the action of gravity so that the wall thickness section 1014 is parallel to the outer peripheral surface 11 of the valve seat. The valve seat extractor 1001 has a stop part to prevent the valve seat extractor 1001 from hinged and rotating relative to the connector located in the horizontal position under the action of gravity, and to make the maximum projected diameter of the valve seat extractor 1001 in the vertical plane smaller than the inner diameter of the valve seat. The side of the connector away from the valve seat extractor 1001 is provided with a pulling mechanism for pulling the valve seat extractor so that the wall thickness section 1014 pushes the outer peripheral surface 11 of the valve seat.

[0028] Among the above-mentioned components, in the case of Figure 2-4 In the illustrated embodiment, the valve seat extractor 1001 has a hollow quadrangular prism with an opening at the top and an opening on one side wall. Specifically, the valve seat extractor 1001 includes a bottom wall 1013 and a first side wall 1011 on the bottom wall 1013 and two opposing second side walls 1015, forming a hollow quadrangular prism with an opening at the top and an opening on the side wall. The side wall opening forms a through groove, and the first side wall 1011 opposite to the through groove forms a stop. The two groove walls of the through groove are on the same plane, which is the wall thickness section 1014 of the second side wall 1015. The wall thickness section 1014 of the two second side walls 1015 forms a first end face that pushes the valve seat away from the outer peripheral surface of the valve ball so that the valve seat can be dislodged in the horizontal direction. In other embodiments, the valve seat extractor 1001 may be a hollow triangular prism, hollow pentagonal prism, or hollow hexagonal prism, or other hollow prism structures with an open top and an open side wall. When the number of sides of the bottom polygon of the hollow prism structure exceeds three, it may also be a hollow prism structure with an open top and multiple open side walls, wherein the side wall opening with a side wall at a relative position constitutes the through groove, the two groove walls are on the same plane, the groove wall constitutes the first end face, and the side wall constitutes the stop portion.

[0029] The bottom wall 1013 forms the gravity component, allowing the valve seat extractor 1001 to hinge and rotate under gravity so that the wall thickness section 1014 is parallel to the outer peripheral surface of the valve seat away from the valve ball. To further enhance the gravity effect of the gravity component, the bottom wall 1013 is provided with a weighting part. The weighting part can be achieved by increasing the wall thickness of the bottom wall 1013, or by fixing a heavy weight block, such as a welded heavy metal block, to the outer surface of the bottom wall 1013. It should be noted that the end face of the weight block facing the through groove is flush with the wall thickness section 1014 to push against the outer peripheral surface 11 of the valve seat.

[0030] The hinge is a pin structure. Two opposing second sidewalls 1015 are provided with first pin holes 1012. The connecting member is a connecting rod 1003. The hinge portion 1009 of the connecting rod 1003 is provided with a second pin hole 1008. One end with the second pin hole 1008 extends into the inner cavity between the two opposing second sidewalls 1015. The pin passes through the first pin hole 1012 and the second pin hole 1008, so that the end of the connecting rod 1003 is hinged to the inside of the valve seat extractor 1001. The top opening, sidewall opening and hollow inner cavity of the hollow quadrangular prism of the valve seat extractor 1001 constitute the clearance space for the connecting rod 1003 to rotate around the pin.

[0031] by Figure 2 Taking the indicated orientation as a reference, when the connecting rod 1003 is hinged and rotated to the vertical direction, the relative positions of the connecting rod 1003 and the valve seat extractor 1001 remain unchanged. The direction of the disassembly tool is adjusted so that the connecting rod 1003 is in a horizontal position, and the first side wall 1011 is located below the connecting rod 1003. At this time, the first side wall 1011, as a stop, can prevent the valve seat extractor 1001 from hinged and rotating relative to the horizontally positioned connecting rod 1003 under the gravity of the bottom wall 1013. The maximum projected diameter of the valve seat extractor 1001 on the vertical plane is set to be smaller than the inner diameter of the valve seat, so that the disassembly tool can pass horizontally through the inner hole of the valve seat and reach the outlet 8. At this time, the connecting rod 1003 is rotated along the circumference of the valve seat 3 so that the first side wall 1011 no longer acts as a stop. Under the gravity of the bottom wall 1013, the valve seat extractor 1001 hinges and rotates relative to the horizontal connecting rod 1003 along the hinge axis until it becomes Figure 2 As shown in the positional relationship, the wall thickness section 1014 is parallel to the outer peripheral surface 11 of the valve seat. By pulling the connecting rod 1003, the wall thickness section 1014 pushes the outer peripheral surface 11 of the valve seat to make the valve seat 3 come out in the horizontal direction, thereby realizing the disassembly of the valve seat 3.

[0032] In other embodiments, the connector can be hinged to the outside of the valve seat extractor 1001. For example, the valve seat extractor 1001 includes a straight plate, with a weight welded to one end as a gravity component. The two end faces of the weight, perpendicular to the welded end face, are flush with the two end faces of the straight plate. The end face perpendicular to the welded end face forms a first end face that pushes the valve seat away from the outer circumference of the valve ball, causing the valve seat to disengage horizontally. A stop portion is provided on the surface of the straight plate, which can be a stop rod, stop plate, etc., perpendicular to the plate surface. The surface of the straight plate has a pin hole, and the connector is connected via a pin shaft. The structure is hinged to the straight plate, with the pin hole located between the weight block and the stop. When the connecting part is in a horizontal position, the stop abuts against the lower side of the connecting part, preventing the valve seat extractor 1001 from hingedly rotating relative to the horizontally positioned connecting part under the action of gravity. Furthermore, the maximum projected diameter of the valve seat extractor 1001 in the vertical plane is set smaller than the inner diameter of the valve seat, allowing the valve seat extractor 1001 to pass through the inner hole of the valve seat in the horizontal direction. Then, under the action of the pulling mechanism, the first end face of the valve seat extractor 1001 pushes against the outer circumferential surface 11 of the valve seat, achieving the disassembly of the valve seat 3. However, at this time, the valve seat extractor only experiences force on the side closest to the connecting part, resulting in uneven force distribution on both sides. Prolonged pulling on the force-affected side is prone to damage. Therefore, preferably, the valve seat extractor has an internal clearance space to allow the connecting part to hinge and rotate, so that the connecting part is hinged inside the valve seat extractor. In this case, the valve seat extractor experiences force on both sides of the connecting part, resulting in stable pulling and less risk of damage.

[0033] In other embodiments, the valve seat extractor 1001 may also be a barrel-shaped structure with an end opening. The side wall of the barrel-shaped structure has a through groove extending to the opening of the barrel-shaped structure. The two groove walls are on the same plane, and the groove walls constitute the first end face. The side wall of the valve seat extractor 1001 located opposite to the through groove constitutes the stop portion. The through groove of the valve seat extractor, the end opening of the barrel-shaped structure, and the hollow inner cavity constitute the clearance space. The side wall opposite to the through groove formed by the side wall opening constitutes the stop portion.

[0034] Regardless of whether the valve seat extractor 1001 has a hollow prism structure or a barrel structure, the two walls of the through groove of the valve seat extractor may not be on the same plane. For example, when the valve seat extractor 1001 has a hollow quadrangular prism structure with an opening at one end and an opening on one side wall, the side wall opening constitutes the through groove, and the included angle between the two walls of the through groove is 90°. When the valve seat extractor 1001 has a barrel structure, the side wall of the valve seat extractor has a through groove extending to the opening, and the two walls of the through groove are the wall thickness sections of the side wall of the barrel structure. When the two walls of the through groove are not on the same plane, the plane located at the through groove of the valve seat extractor constitutes the first end face. It is understood that the plane of the valve seat extractor 1001 located in the through groove refers to the outer wall surface of the hollow prism structure or barrel structure located in the through groove. When the pulling mechanism pulls, the outer wall surface mainly pushes against the outer peripheral surface 11 of the valve seat. However, the contact area between the outer wall surface and the outer peripheral surface 11 of the valve seat is small and it is easy to slip, which makes the pulling force eccentric with the central axis of the hollow structure of the valve seat, requiring a large pulling force. Therefore, it is preferable that the two groove walls of the through groove are on the same plane, and the groove walls constitute the first end face.

[0035] When the valve seat extractor 1001 is pushed against the first end face, the valve seat 3, after being dislodged horizontally, easily slips onto the connector. When the connector is slowly removed from the inspection port 10, the valve seat 3 easily gets stuck inside the valve body 1. Therefore, in situations such as... Figure 2-4 In the illustrated embodiment, the valve seat extractor 1001 has a protruding portion 1141 extending into the valve seat at the position of the wall thickness section 1014 of the second side wall 1015. The two end faces of the protruding portion 1141 are used to mate with the inner wall of the valve seat 3. The two end faces of the protruding portion 1141 and the wall thickness section 1014 form a stepped surface, so that the valve seat 3 is stably stuck on the stepped surface, and it is not easy for the valve seat 3 to slip onto the connector after it is dislodged in the horizontal direction.

[0036] In such Figure 2-4 In the illustrated embodiment, the connecting member is a connecting rod 1003, and the pulling mechanism includes a sliding hammer 1004 that slides along the connecting rod 1003. The end of the connecting rod 1003 away from the valve seat extractor 1001 is provided with a stop to prevent the sliding hammer 1004 from sliding. When pulling, the sliding hammer 1004 strikes the stop to provide a pulling force to the connecting rod 1003, which is used to pull the valve seat extractor so that the first end face pushes the valve seat away from the outer peripheral surface of the valve ball, thereby causing the valve seat 3 to come out in the horizontal direction.

[0037] In other embodiments, the connector is a screw, and the pulling mechanism includes a support frame for supporting the end face of the valve body 1 located at the inspection port 10. The support frame has a through hole for the screw to pass through. A nut adapted to the screw is installed on the side of the support frame away from the inspection port 10. During pulling, the screw applies a pulling force to the valve seat extractor by tightening the nut. The support frame is a barrel-shaped structure, with its sidewalls fitted onto the outer wall of the valve body 1, and its bottom wall having a through hole for the screw to pass through.

[0038] When overhauling the right-angle single-flow valve, the disassembly sequence from the inspection port 10 is as follows: plug 4, fastener 18, raceway assembly 61, valve ball 2, and valve seat 3. Specifically, the valve ball 2 is first pulled out using a magnetic component, and then the valve seat 3 is disassembled. Therefore, the stop is detachably connected to the connecting rod 1003. A magnetic component is installed at the end of the connecting rod 1003 away from the valve seat extractor 1001, positioned between the connecting rod 1003 and the stop. For example, a first groove for installing the magnetic component is provided at the end of the connecting rod 1003 away from the valve seat extractor 1001, and a second groove adapted to the connecting rod 1003 is provided at the end of the stop near the connecting rod 1003, allowing the stop to be threaded onto the outer wall of the threaded connection portion 1010 of the connecting rod 1003. When disassembling a right-angle check valve, the stop can be removed from the connecting rod 1003 first. The valve ball 2 can then be removed using the magnetic component at the end of the connecting rod 1003. The stop is then fitted back onto the connecting rod 1003, and the sliding hammer 1004 is used to strike the stop to provide a pulling force to the connecting rod 1003. The valve seat extractor 1001 is then used to remove the valve seat 3. To simplify the use of the disassembly tools, a magnetic component is installed at the end of the stop away from the valve seat extractor 1001, used to pull out the valve ball 2 during disassembly of the right-angle check valve. The magnetic component is a magnetic disc 1007. A cylindrical groove 1002, adapted to the magnetic disc 1007, is provided at the end of the stop away from the valve seat extractor 1001. The magnetic disc 1007 is adhered to the cylindrical groove 1002 with adhesive, preventing it from being easily snagged and improving its installation tightness.

[0039] After the disassembly and replacement of all components of the right-angle single-flow valve are completed, the replaced valve seat 3 needs to be reinstalled into the valve body 1. A valve seat mounting base 1006 is installed at the end of the pull-out mechanism away from the valve seat extractor. The valve seat mounting base 1006 has a second end face that pushes the valve seat close to the outer circumferential surface of the valve ball. The valve seat mounting base 1006 can be installed at the end of the stop member away from the valve seat extractor 1001. To simplify the structure of the disassembly and assembly tools, preferably, the stop member has a second end face that pushes the valve seat close to the outer circumferential surface of the valve ball, and the stop member constitutes the valve seat mounting base 1006. The valve seat mounting base 1006 includes a frustum portion coaxial with the connecting rod 1003 and whose diameter gradually increases along the direction close to the valve seat extractor 1001. The outer circumferential surface of the frustum constitutes the second end face. It is understood that the valve seat mounting base 1006 can be a frustum structure as a whole, or it can include a frustum portion and a cylindrical portion coaxially disposed on the frustum portion away from the valve seat extractor 1001; a rubber sleeve 1005 is fitted on the outer side of the valve seat mounting base 1006 to prevent damage to the valve seat sealing line of the check valve. The valve seat mounting base 1006 can also include a cylindrical portion with a diameter larger than the inner hole of the valve seat 3, and the end face of the cylindrical portion away from the valve seat extractor 1001 constitutes the second end face.

[0040] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model is defined by the claims.

Claims

1. A tool for disassembling and assembling a check valve, characterized in that, The device includes a connector and a valve seat extractor hinged to one end of the connector. The valve seat extractor has a first end face that pushes the valve seat away from the outer circumferential surface of the valve ball to allow the valve seat to disengage horizontally. The valve seat extractor has a gravity component for hinged rotation under gravity, so that the first end face is parallel to the outer circumferential surface of the valve seat away from the valve ball. The valve seat extractor has a stop component to prevent the valve seat extractor from hinged rotation relative to the horizontally positioned connector under the action of gravity, and to ensure that the maximum projected diameter of the valve seat extractor in the vertical plane is smaller than the inner diameter of the valve seat. The side of the connector away from the valve seat extractor has a pulling mechanism for pulling the valve seat extractor so that the first end face pushes the valve seat away from the outer circumferential surface of the valve ball.

2. The one-way valve disassembly and assembly tool as described in claim 1, characterized in that, The valve seat extractor has an internal clearance space to allow for hinged rotation of the connector.

3. The one-way valve disassembly and assembly tool as described in claim 2, characterized in that, The valve seat extractor has a hollow structure with one end open. The side wall of the valve seat extractor has a through groove extending to the opening. The side wall of the valve seat extractor located opposite the through groove forms the stop part. The plane of the valve seat extractor located at the through groove forms the first end face. The through groove, the one end opening and the hollow inner cavity of the hollow structure of the valve seat extractor form the clearance space. The end of the valve seat extractor away from the opening forms the gravity part.

4. The one-way valve disassembly and assembly tool as described in claim 3, characterized in that, The two walls of the through groove are on the same plane, and the groove walls form the first end face.

5. The one-way valve disassembly and assembly tool as described in any one of claims 1-4, characterized in that, The valve seat extractor has a protrusion extending into the valve seat at the first end face, and the two ends of the protrusion are used to cooperate with the inner wall of the valve seat.

6. The one-way valve disassembly and assembly tool as described in any one of claims 1-4, characterized in that, The pulling mechanism has a magnetic component installed at the end away from the valve seat extractor.

7. The one-way valve disassembly and assembly tool according to any one of claims 1-4, characterized in that, The pulling mechanism includes a sliding hammer that slides along the connector, and the end of the connector away from the valve seat extractor is provided with a stop to prevent the sliding hammer from sliding.

8. The one-way valve disassembly and assembly tool as described in claim 7, characterized in that, The pulling mechanism has a valve seat mounting base installed at the end away from the valve seat extractor. The valve seat mounting base has a second end face that pushes the valve seat close to the outer peripheral surface of the valve ball.

9. The one-way valve disassembly and assembly tool as described in claim 8, characterized in that, The stop member has a second end face that pushes the valve seat close to the outer peripheral surface of the valve ball, and the stop member constitutes the valve seat mounting base.

10. The one-way valve disassembly and assembly tool as described in claim 9, characterized in that, The valve seat mounting base includes a frustum portion whose diameter gradually increases along the direction close to the valve seat extractor, and the outer peripheral surface of the frustum portion forms the second end face.

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