Spiral lifting type valve seat dismounting tool

Abstract

The utility model relates to the technical field of valve seat dismounting tools, in particular to a spiral lifting type valve seat dismounting tool which comprises a sleeve body, a driving rod, a squeezing and pushing piece and n dispersing pieces, n is an integer larger than or equal to 2, the sleeve body is used for being inserted into a mounting cavity of a valve body and penetrating through a valve seat, and the lower end of the driving rod is arranged in the sleeve body in a penetrating mode. The dispersing part is arranged in the sleeve body, the extruding and pushing part is arranged above the dispersing part and located below the driving rod, the wall, opposite to the dispersing part, of the extruding and pushing part is an extruding and pushing wall, the wall, opposite to the extruding and pushing part, of the dispersing part is a dispersing wall, and the extruding and pushing wall and / or the dispersing wall gradually get close to the center line of the driving rod from top to bottom. According to the design of the dismounting tool, the driving rod rotates downwards to extrude the extruding and pushing piece, so that the extruding and pushing piece downwards extrudes the outer side of the dispersing piece out of the sleeve body to drag up the valve seat, the dismounting tool is lifted up to rapidly dismount the valve seat from the valve body, and rapid dismounting of the valve seat is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve seat disassembly tools, and particularly relates to a screw-lifting valve seat disassembly tool. Background Technique

[0002] During the use of a valve, due to reasons such as valve opening and closing, medium erosion, and corrosion wear, the sealing surface of the valve seat will be continuously damaged, resulting in a decline in the sealing performance of the valve. Therefore, a globe valve with a replaceable valve seat has been designed and developed. By replacing the valve seat of the valve, the performance of the valve can be improved and the overall service life of the valve can be increased. However, during the use of the valve, the valve seat is easily stuck in the valve body. At this time, it is difficult to remove it with a temporary tool. If the valve seat cannot be removed, the valve needs to be replaced, which deviates from the original design intention of the replaceable valve seat. Even if force is used to remove it, it will be very time-consuming and laborious. Therefore, there is an urgent need to design a screw-lifting valve seat disassembly tool to solve the above problems. Summary of the Invention

[0003] The purpose of the utility model is to provide a screw-lifting valve seat disassembly tool, which solves the problem that the sealing surface of the valve seat is easily damaged and difficult to remove with a temporary tool, and thus the valve needs to be replaced.

[0004] To solve the above technical problems, the utility model provides a screw-lifting valve seat disassembly tool. The disassembly tool includes a sleeve body, a driving rod, a pushing member, and n dispersing members, where n is an integer greater than or equal to 2. The sleeve body is used to be inserted into the installation cavity of the valve body and pass through the valve seat. The lower end of the driving rod is arranged in the sleeve body.

[0005] The dispersing members are arranged in the sleeve body. The pushing member is arranged above the dispersing members and below the driving rod. The wall of the pushing member opposite to the dispersing members is a pushing wall, and the wall of the dispersing members opposite to the pushing member is a dispersing wall. The pushing wall and / or the dispersing wall gradually approaches the center line of the driving rod from top to bottom. The dispersing members partially extend out of the side of the sleeve body under the extrusion force of the pushing member to lift the valve seat.

[0006] Further, the lower parts of the outer sides of the n dispersing members approach inward from top to bottom, and the n is 3.

[0007] Further, the dispersing member is a first sphere.

[0008] Further, an installation groove is provided on the inner wall of the lower end of the sleeve body, and n through holes communicating with the installation groove are uniformly distributed on the outer wall thereof. The diameter of each through hole is smaller than the diameter of the first sphere.

[0009] Further, the longitudinal section of the installation groove is an inverted T shape. The upper part of the inverted T shape is for the push member to enter and exit. The lower part is communicated with the through hole and accommodates n horizontally placed first spheres. The height of the lower part of the inverted T shape is greater than the height of each first sphere.

[0010] Further, a stepped hole is provided in the inner wall of the upper end of the sleeve body. The bottom stepped surface of the stepped hole is used to fit with the bottom stepped surface of the shoulder of the driving rod.

[0011] Further, the stepped hole is threadedly connected to the shoulder of the driving rod.

[0012] Further, a positioning disk is fixedly provided on the outer wall of the upper part of the sleeve body. The outer diameter of the positioning disk is greater than the inner diameter of the valve body installation cavity. The positioning disk and the sleeve body are integrally formed.

[0013] Further, the push member is a second sphere.

[0014] Further, when the outer sides of the n first spheres are in contact with the inner wall of the through hole, the radius of the circumscribed circle of the orthographic projection of the three first spheres in the vertical direction is smaller than the radius of the second sphere.

[0015] Advantages of the present utility model: The design of the disassembly tool of the present utility model can drive the driving rod to rotate downward to squeeze the push member, so that the push member squeezes the outside of the dispersing member downward out of the sleeve body to lift the valve seat, and lift the disassembly tool to quickly disassemble the valve seat from the valve body, realizing the quick disassembly of the valve seat;

[0016] The design of the threaded fit between the stepped hole in the inner wall of the upper end of the sleeve body and the shoulder of the driving rod can enable the driving rod to move smoothly up and down along the thread on the hole wall of the stepped hole in the inner wall of the upper end of the sleeve body, improving the smoothness of the movement of the driving rod and the uniformity of the extrusion and dispersion of the push member on the dispersing member;

[0017] The design of the installation groove and the dispersing member sphere can enable the dispersing member to reduce the damage caused by the extrusion friction between the two through the contact of the curved surface with the curved surface under the extrusion of the push member. Coupled with the limit of the middle step of the inverted T-shaped installation groove and the design of the through hole diameter, the dispersing member can only partially extend out of the through hole to prevent the dispersing member from detaching from the sleeve body through the through hole;

[0018] The design of the push member and the dispersing member sphere can prevent the problem that when the disassembly tool of the present utility model cannot take out the valve seat from the valve body, the disassembly tool needs to be taken out to avoid the disassembly tool being stuck in the valve seat and unable to be taken out, resulting in the scrapping of the valve and the disassembly tool;

[0019] When removing the disassembly tool inside the valve seat, rotate the drive rod so that the upper part of the drive rod and the stepped hole of the sleeve body are screwed together, causing the drive rod to rise. While rising, the drive rod no longer applies an extrusion force to the dispersing part through the extrusion piece. When pulling out the sleeve body, the sleeve body moves upward relative to the valve seat. During the upward movement of the sleeve body, the valve seat will push the part of the dispersing part extending out of the sleeve body into the sleeve body, so that the disassembly tool can be pulled out of the valve without being blocked by the valve seat that cannot be disassembled. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a cross-sectional view of a screw-lift valve seat disassembly tool according to an embodiment of the present invention installed in a valve body;

[0022] Figure 2 It is a cross-sectional view of a screw-lift valve seat disassembly tool according to an embodiment of the present invention detaching the valve seat from the valve body;

[0023] Figure 3 It is a cross-sectional view of a screw-lift valve seat disassembly tool according to an embodiment of the present invention;

[0024] Figure 4 It is an A-A cross-sectional view of a screw-lift valve seat disassembly tool according to an embodiment of the present invention;

[0025] Figure 5 It is a schematic view in the B direction of a screw-lift valve seat disassembly tool according to an embodiment of the present invention;

[0026] In the figure: 1 - disassembly tool, 2 - valve body, 3 - valve seat, 11 - sleeve body, 12 - drive rod, 13 - extrusion piece, 14 - dispersing part, 21 - installation cavity, 111 - stepped hole, 112 - installation groove, 113 - through hole, 114 - positioning disk, 121 - drive head. Detailed Embodiment

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] The following will be described in detail in conjunction with a specific embodiment of the present utility model and the attached Figures 1-5 drawings. Specifically, a screw-lifting valve seat disassembly tool is disclosed. The disassembly tool 1 includes a sleeve body 11, a driving rod 12, a pushing member 13, and n dispersing members 14, where n is an integer greater than or equal to 2. The sleeve body 11 is used to be inserted into the installation cavity 21 of the valve body 2 and pass through the valve seat 3. The lower end of the driving rod 12 is inserted into the sleeve body 11, and a driving head 121 is provided at the top of the driving rod 12.

[0029] The dispersing members 14 are arranged in the sleeve body 11. The pushing member 13 is arranged above the dispersing members 14 and below the driving rod 12. The wall of the pushing member 13 opposite to the dispersing members 14 is the pushing wall, and the wall of the dispersing members 14 opposite to the pushing member 13 is the dispersing wall. The pushing wall and / or the dispersing wall gradually approach the center line of the driving rod 12 from top to bottom. The pushing wall and / or the dispersing wall can be an inclined plane wall or a curved surface wall. The dispersing members 14 partially extend out of the side of the sleeve body 11 under the extrusion force of the pushing member 13 to lift the valve seat 3. The lower outer sides of the n dispersing members 14 approach each other from top to bottom. In this embodiment, n is 3, the dispersing members 14 are first spheres, the pushing member 13 is a second sphere, and the radius of the circumscribed circle of the orthographic projection of the three first spheres in the vertical direction is smaller than the radius of the second sphere. In addition, the pushing member 13 can also be an inverted cone.

[0030] In this embodiment, the pushing member 13 is not connected to the driving rod 12. In other embodiments, the pushing member 13 can also be fixedly arranged at the bottom of the driving rod 12.

[0031] A stepped hole 111 is provided in the inner wall of the upper end of the sleeve body 11. The bottom stepped surface of the stepped hole 111 is used to fit with the bottom stepped surface of the rod shoulder of the driving rod 12. The stepped hole 111 is threadedly connected to the rod shoulder of the driving rod 12. The outer wall of the sleeve body 11 is in clearance fit with the inner wall of the valve seat 3. The design of the threaded fit between the stepped hole 111 in the inner wall of the upper end of the sleeve body 11 and the rod shoulder of the driving rod 12 can enable the driving rod 12 to move smoothly up and down along the thread on the hole wall of the stepped hole 111 in the inner wall of the upper end of the sleeve body 11, so as to improve the smoothness of the movement of the driving rod 12 and improve the uniformity of the dispersion of the pushing member 13 squeezing the dispersing members 14.

[0032] An installation groove 112 is provided in the inner wall of the lower end of the sleeve body 11, and n through holes 113 communicating with the installation groove 112 are uniformly distributed on its outer wall. The number of the through holes 113 is equal to the number of the dispersing members 14. The diameter of each through hole 113 is smaller than the diameter of each first sphere, and the number of the through holes 113 is equal to the number of the first spheres.

[0033] The longitudinal section of the installation groove 112 is an inverted T shape. The upper part of the inverted T shape is used for the pushing member 13 to enter and exit. The lower part is communicated with the through hole 113 and contains n horizontally placed first spheres. The height of the lower part of the inverted T shape is greater than the height of each first sphere, and the diameter of each first sphere is smaller than the inner diameter of the inner hole in the middle of the sleeve body 11. The lower part of the inverted T-shaped installation groove 112 is communicated with each through hole 113. When the outer sides of the n first spheres in the lower part of the inverted T-shaped installation groove 112 are in contact with the inner wall of the through hole 113, the distance between the n first spheres is smaller than the outer diameter of the second sphere. The design of the installation groove 112 and the spheres of the dispersing member 14 can enable the dispersing member 14 to reduce the damage caused by the extrusion friction between the two through the contact of the curved surfaces under the extrusion of the pushing member 13. Coupled with the limit of the middle step of the inverted T-shaped installation groove 112 and the design of the aperture of the through hole 113, the dispersing member 14 can only partially extend out of the through hole 113 to prevent the dispersing member 14 from detaching from the sleeve body 11 through the through hole 113.

[0034] In the design of the pushing member 13 and the spheres of the dispersing member 14, when the disassembly tool 1 of the present utility model cannot take out the valve seat 3 from the valve body 2 and it is necessary to take out the disassembly tool 1 and perform a secondary operation, the disassembly tool 1 needs to be taken out to avoid the problem that the disassembly tool 1 is stuck in the valve seat 3 and cannot be taken out, resulting in the scrapping of both the valve and the disassembly tool.

[0035] A positioning disk 114 is provided on the outer wall of the upper part of the sleeve body 11. The outer diameter of the positioning disk 114 is greater than the inner diameter of the installation cavity 21 of the valve body 2, and the positioning disk 114 and the sleeve body 11 are of an integrally formed structure.

[0036] When taking out the disassembly tool 1 in the valve seat 3, rotate the driving rod 12 to make the upper part of the driving rod 12 rotate threadedly with the stepped hole 111 of the sleeve body 11, so that the driving rod 12 rises. While rising, the driving rod 12 no longer applies an extrusion force to the dispersing member 14 through the pushing member 13. When the sleeve body 11 is pulled out, the sleeve body 11 moves upward relative to the valve seat 3. During the upward movement of the sleeve body 11, the valve seat 3 will push the part of the dispersing member 14 extending out of the sleeve body 11 to move into the sleeve body 11, so that the disassembly tool 1 can be pulled out of the valve seat 3 without being blocked by the dispersing member 14.

[0037] The working process of the present utility model:

[0038] When disassembling, insert the lower part of the sleeve body 11 into the installation cavity 21 of the valve body 2 and pass through the inner hole of the valve seat 3. When the through hole 113 on the outer side wall of the sleeve body 11 is located below the valve seat 3, at this time, the bottom of the positioning disk 114 on the upper part of the sleeve body 11 is flush with the top of the valve body 2. Rotate the driving head 121 at the top of the driving rod 12, and the driving rod 12 rotates threadedly with the stepped hole 111 at the upper end of the sleeve body 11, so that the driving rod 12 descends. Then, the lower end of the driving rod 12 also simultaneously pushes the squeezing member 13 downward, so as to squeeze the middle part of the dispersing member 14 to spread outwards, so that it can move along the groove at the lower part of the installation groove 112 towards the through hole 113, and the outer sides of the three first spheres of the dispersing member 14 extend out of the through hole 113. Then, pull the sleeve body 11, and while the entire disassembly tool 1 rises, the valve seat 3 is lifted by the three first spheres and the valve seat 3 is pulled away from the valve body 2 to realize the disassembly of the valve seat 3;

[0039] When the valve seat 3 needs to be removed from the disassembly tool, use a tool to rotate the driving head 121 at the top of the driving rod 12 to drive the driving rod 12 to reverse, so that the threaded section at the step of the upper part of the driving rod 12 rotates away from the stepped hole 111 at the upper end of the sleeve body 11. Then, the dispersing member 14 no longer bears the extrusion of the driving rod 12 and the squeezing member 13. In addition, an external force pushes the dispersing member 14 to retract into the sleeve body 11, and then the valve seat 3 can slide downward along the lower part of the sleeve body 11 and be taken off;

[0040] When the disassembly tool 1 of the present utility model cannot take out the valve seat 3 from the valve body 2 and the disassembly tool 1 needs to be taken out for secondary operation, the disassembly tool 1 needs to be taken out to avoid the problem that the disassembly tool 1 is stuck in the valve seat 3 and cannot be taken out, resulting in the scrapping of both the valve and the disassembly tool 1;

[0041] When taking out the disassembly tool 1 in the valve seat 3, rotate the driving rod 12 so that the upper part of the driving rod 12 rotates threadedly with the stepped hole 111 of the sleeve body 11, so that the driving rod 12 rises. While rising, the driving rod 12 no longer applies an extrusion force to the dispersing member 14 through the squeezing member 13. When the sleeve body 11 is pulled out, the sleeve body 11 is relative to the valve seat 3 upward. During the rising process of the sleeve body 11, the valve seat 3 will push the part of the dispersing member 14 extending out of the sleeve body 11 to move into the sleeve body 11, so that the disassembly tool 1 can be pulled out of the valve without being blocked by the valve seat 3 that cannot be disassembled.

[0042] The above-disclosed is only a preferred embodiment of the present utility model. Of course, it cannot be used to limit the scope of the rights of the present utility model. Therefore, equivalent changes made according to the claims of the present utility model still fall within the scope covered by the present utility model.

Claims

1. A screw-lift valve seat disassembly tool, characterized in that, The disassembly tool (1) includes a sleeve body (11), a driving rod (12), a pushing member (13) and n dispersing members (14), where n is an integer greater than or equal to 2. The sleeve body (11) is used to be inserted into the installation cavity (21) of the valve body (2) and pass through the valve seat (3). The lower end of the driving rod (12) is inserted into the sleeve body (11). The dispersing members (14) are arranged in the sleeve body (11). The pushing member (13) is arranged above the dispersing members (14) and below the driving rod (12). The wall of the pushing member (13) opposite to the dispersing members (14) is the pushing wall, and the wall of the dispersing members (14) opposite to the pushing member (13) is the dispersing wall. The pushing wall and / or the dispersing wall gradually approach the center line of the driving rod (12) from top to bottom. The dispersing members (14) partially extend out of the side of the sleeve body (11) under the extrusion force of the pushing member (13) to lift the valve seat (3).

2. The spiral lifting type valve seat disassembly tool according to claim 1, characterized in that, The lower outer sides of the n dispersing members (14) approach inward from top to bottom, and n is 3.

3. The spiral lifting type valve seat disassembly tool according to claim 2, wherein The dispersing members (14) are first spheres.

4. The spiral lifting type valve seat disassembly tool according to claim 3, characterized in that, The inner wall of the lower end of the sleeve body (11) is provided with an installation groove (112), and n through holes (113) communicating with the installation groove (112) are uniformly distributed on its outer wall. The diameter of each through hole (113) is smaller than the diameter of the first sphere.

5. The spiral lifting type valve seat disassembly tool according to claim 4, characterized in that, The longitudinal section of the installation groove (112) is an inverted T shape. The upper part of the inverted T shape is used for the pushing member (13) to enter and exit. The lower part is communicated with the through hole (113) and accommodates n horizontally placed first spheres. The height of the lower part of the inverted T shape is greater than the height of each first sphere.

6. The spiral lifting type valve seat disassembly tool according to claim 1, wherein, A stepped hole (111) is opened on the inner wall of the upper end of the sleeve body (11). The bottom step surface of the stepped hole (111) is used to fit with the bottom step surface of the rod shoulder of the driving rod (12).

7. The spiral lifting type valve seat disassembly tool according to claim 6, characterized in that, The stepped hole (111) is threadedly connected with the rod shoulder of the driving rod (12).

8. The spiral lifting type valve seat disassembly tool according to claim 1, wherein, A positioning disc (114) is fixedly arranged on the outer wall of the upper part of the sleeve body (11). The outer diameter of the positioning disc (114) is greater than the inner diameter of the installation cavity (21) of the valve body (2). The positioning disc (114) and the sleeve body (11) are of an integrally formed structure.

9. The spiral lifting type valve seat disassembly tool according to claim 4, characterized in that, The pushing member (13) is a second sphere.

10. The spiral lifting type valve seat disassembly tool according to claim 9, characterized in that, When the outer sides of the n first spheres are in contact with the inner wall of the end of the through hole (113), the radius of the circumscribed circle of the orthographic projection of the three first spheres in the vertical direction is smaller than the radius of the second sphere.

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