Valve body and valve seat dismounting device

Abstract

The utility model discloses a valve body and valve seat dismounting device which is characterized in that a supporting plate is buckled on a valve body, and a first sleeve is arranged in the center of the supporting plate; the second sleeve is in threaded connection with the first sleeve; the balls are arranged at the bottom of the second sleeve at intervals, the two top plates are symmetrically arranged at the two ends of the bottom of the second sleeve, one ends of the two top plates are fixedly connected with the adjacent balls, the other ends of the two top plates abut against the inner wall of the valve seat, and one end of the ejector rod is close to or away from the bottom of the second sleeve in the axial length direction of the middle of the second sleeve. And part of the circumferential surfaces of the balls are propped against. The ejector rod is inserted into the second sleeve, and one end of the ejector rod axially moves to abut against the ball to push the ball to generate radial displacement. The ball displaces to drive the top plate to expand outwards, and uniform radial force is applied to the inner wall of the valve seat. After the top plate abuts against the inner wall of the valve seat, the first sleeve is rotated, the second sleeve and the ejector rod move vertically together, the valve body and the valve seat are detached, deformation of the valve body and the valve seat is avoided, and structural integrity is guaranteed.

Description

Technical Field

[0001] This application relates to the field of valve body disassembly technology, and in particular to a valve body and valve seat disassembly device. Background Technology

[0002] The valve body is a control component in a pipeline fluid transport system, used to change the cross-sectional area of ​​the passage and the direction of medium flow. Due to prolonged use, corrosion or high-temperature deformation can cause the valve body and seat to seize up, leading to complicated maintenance. In severe cases, the valve seat may need to be completely destroyed and replaced.

[0003] In the existing technology, there are no suitable disassembly tools in the production process. Workers usually use temporary objects to violently strike the valve seat from the tail end. Moreover, this striking causes uneven force on the valve seat, which can easily damage it.

[0004] Therefore, there is an urgent need for a valve body and seat disassembly device to solve the above problems. Utility Model Content

[0005] This application provides a valve body and seat disassembly device, which aims to protect the valve body and seat while facilitating the disassembly of the valve body and seat.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A valve body and valve seat disassembly device includes a support plate, a first sleeve, a second sleeve, a push rod, multiple balls, and two top plates;

[0008] The support plate is fastened to the end of the valve body.

[0009] The first sleeve is rotatably positioned at the center of the support plate;

[0010] The outer wall of the second sleeve is threadedly connected to the inner wall of the first sleeve;

[0011] Multiple balls are spaced apart at the bottom of the second sleeve, and their circumferential surfaces slide in contact with the inner bottom wall of the second sleeve.

[0012] Two top plates are symmetrically arranged at the bottom ends of the second sleeve, and one end of each top plate is fixedly connected to the adjacent ball bearing, while the other end abuts against the inner wall of the valve seat.

[0013] The push rod is located inside the second sleeve. One end of the push rod moves towards or away from the bottom of the second sleeve along the axial length of the middle part of the second sleeve and abuts against part of the circumferential surface of the ball.

[0014] Furthermore, the inner wall of the first sleeve and the outer wall of the second sleeve form a first rotation path, and the inner wall of the middle part of the second sleeve and the outer wall of the push rod form a second rotation path. The first rotation path and the second rotation path are opposite.

[0015] Furthermore, the second sleeve has an inverted T-shaped structure. Limiting sleeves are fixedly installed at both ends of the bottom of the second sleeve. Limiting grooves are recessed at both ends of the limiting sleeve away from the second sleeve from their axis. The length direction of the limiting grooves is perpendicular to the bottom axis of the second sleeve. The groove wall of the limiting groove is in sliding contact with the corresponding top plate.

[0016] Furthermore, the top plate includes a connecting part and a snap-fit ​​part;

[0017] The circumferential surface of the connecting part is slidably connected to the groove wall of the limiting groove, and one end of the connecting part is fixedly connected to the balls at both ends of the bottom of the second sleeve, and the other end is fixedly connected to one end of the snap-fit ​​part.

[0018] The other end of the snap-fit ​​part abuts against the snap-fit ​​part of the valve seat, and its circumferential contour matches the cross-sectional contour of the snap-fit ​​part of the valve seat.

[0019] Furthermore, the support plate has a flange extending from its edge towards the bottom of the second sleeve, and the inner wall of the flange is in contact with the circumferential surface of the valve body.

[0020] Furthermore, the end of the push rod near the ball has a tapered structure, and the end of the push rod away from the ball is fixedly equipped with a handle.

[0021] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0022] In this application, a support plate is fixed in place at the end of the valve body. A first sleeve is rotatably mounted at the center of the support plate, and a second sleeve is threadedly connected to the inner wall of the first sleeve, forming a telescopic transmission structure. A push rod is inserted into the second sleeve, with one end moving axially against a ball bearing, causing it to move radially. The ball bearing displacement causes the top plate to expand outward, applying a uniform radial force to the inner wall of the valve seat. After the top plate abuts against the inner wall of the valve seat, the first sleeve is rotated, causing the second sleeve and the push rod to move vertically together, completing the disassembly of the valve body and valve seat while preventing deformation and ensuring structural integrity. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural schematic diagram of the assembled state provided in the embodiments of this application;

[0025] Figure 2This is a schematic diagram of the structure in cross-section provided in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of the second sleeve, top rod, and limiting sleeve provided in the embodiments of this application;

[0027] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the top plate provided in an embodiment of this application;

[0029] Figure 6 This is a schematic diagram of the structure of the valve seat and valve body in the prior art.

[0030] Icons: 10-Support plate; 101-Flanged edge; 11-First sleeve; 12-Second sleeve; 13-Top rod; 14-Ball bearing; 15-Top plate; 151-Connecting part; 152-Snap-fit ​​part; 16-Limit sleeve; 161-Limit groove; 17-Handle; Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0032] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0033] like Figures 1-6As shown, a valve body and valve seat disassembly device includes a support plate 10, a first sleeve 11, a second sleeve 12, a push rod 13, a plurality of balls 14, and two top plates 15. The support plate 10 is fastened to the end of the valve body, and the first sleeve 11 is rotatably disposed at the center of the support plate 10. The outer wall of the second sleeve 12 is threadedly connected to the inner wall of the first sleeve 11. The plurality of balls 14 are spaced apart at the bottom of the second sleeve 12, and their circumferential surfaces slide in contact with the inner wall of the bottom of the second sleeve 12. The two top plates 15 are symmetrically disposed at both ends of the bottom of the second sleeve 12, and one end of the two top plates 15 is fixedly connected to the adjacent ball 14, and the other end abuts against the inner wall of the valve seat. The push rod 13 is disposed inside the second sleeve 12, and one end of the push rod 13 moves towards or away from the bottom of the second sleeve 12 along the axial length direction of the middle part of the second sleeve 12, and abuts against part of the circumferential surface of the ball 14.

[0034] In the above scheme, the support plate 10 is fastened to the end of the valve body, fixing the overall position of the device and ensuring stability during operation. The first sleeve 11 is rotatably installed at the center of the support plate 10, and the second sleeve 12 is connected to the inner wall of the first sleeve 11 by threads, forming a telescopic transmission structure. The push rod 13 is inserted into the second sleeve 12, and one end of it moves axially and abuts against the circumferential surface of the ball 14. When the push rod 13 pushes the ball 14, the ball 14 generates radial displacement due to the sliding contact with the inner wall of the second sleeve 12. The displacement of the ball 14 causes the top plate 15 to expand outward, and the end of the top plate 15 applies a uniform radial force to the inner wall of the valve seat. When the end of the top plate 15 abuts against the inner wall of the valve seat, since the support plate 10 is fastened to the end of the valve body and the first sleeve 11 is rotatably connected to the support plate 10, by rotating the first sleeve 11, the second sleeve 12 and the top rod 13, which are threadedly connected to the first sleeve 11, are vertically displaced to the side away from the valve body, thereby realizing the disassembly operation of the valve body and the valve seat, avoiding the deformation of the valve body and valve seat caused by the traditional impact disassembly method, and thus ensuring the structural integrity of the valve body and valve seat.

[0035] The inner wall of the first sleeve 11 and the outer wall of the second sleeve 12 form a first rotation path, and the inner wall of the middle part of the second sleeve 12 and the outer wall of the push rod 13 form a second rotation path. The first rotation path and the second rotation path are opposite.

[0036] In the above scheme, the inner wall of the first sleeve 11 and the outer wall of the second sleeve 12 are connected by threads to form a rotatable transmission pair. The inner wall of the middle part of the second sleeve 12 is connected by threads to the outer wall of the push rod 13 to form another transmission pair. The two transmission pairs form a double-opposite rotation path, realizing bidirectional torque superposition and accuracy control, reducing the operating intensity of the operator while avoiding deformation or cracks caused by local stress concentration. If the first sleeve 11 rotates clockwise to drive the second sleeve 12 to move downward, so that the second sleeve 12 and the push rod 13 descend together into the valve seat and reach the disassembly position of the valve seat, the push rod 13 is rotated to press the balls 14, so that the balls 14 are radially pressed against each other, while the balls 14 located at both ends of the bottom of the second sleeve 12 continue to move outward, driving the top plate 15 fixedly connected to it to press against the inner wall of the valve seat; when the top plate 15 is completely against the valve seat, the first sleeve 11 is rotated counterclockwise, so that the second sleeve 12 and the push rod 13 move upward together, thereby realizing the disassembly of the valve body and the valve seat.

[0037] The second sleeve 12 has an inverted T-shaped structure. Limiting sleeves 16 are fixedly installed at both ends of the bottom of the second sleeve 12. Limiting grooves 161 are recessed at both ends of the limiting sleeves 16 away from the second sleeve 12 from their axis. The length direction of the limiting grooves 161 is perpendicular to the bottom axis of the second sleeve 12. The groove wall of the limiting groove 161 slides in contact with the corresponding top plate 15.

[0038] In the above scheme, the vertical groove wall of the limiting groove 161 restricts the top plate 15 to slide only radially, avoiding uneven force application or valve seat damage caused by the offset of the top plate 15. The inverted T-shaped structure provides stable vertical support force, ensuring that the bottom structure of the second sleeve 12 does not shift when the push rod 13 pushes the ball 14. One end of the top plate 15 is embedded in the limiting groove 161, and the other end abuts against the inner wall of the valve seat; when the push rod 13 pushes the ball 14, the top plate 15 slides along the groove depth direction of the limiting groove 161, ensuring that the top plate 15 can accurately abut against the locking part (locking groove) of the inner wall of the valve seat, ensuring stable disassembly of the valve seat and valve body.

[0039] Alternatively, a spring can be fixedly installed at the end of the limiting sleeve 16 away from the top plate 15, with one end of the spring abutting against the circumferential surface of the ball 14. After the valve body and valve seat are disassembled, when the push rod 13 retracts, the reaction force of the spring resets the top plate 15 and the connected ball 14, thus facilitating the next disassembly operation of the valve body and valve seat. Alternatively, the operator can manually move the top plate 15 to reset it.

[0040] The top plate 15 includes a connecting part 151 and a snap-fit ​​part 152; the peripheral surface of the connecting part 151 is slidably connected to the groove wall of the limiting groove 161, and one end of the connecting part 151 is fixedly connected to the ball bearings 14 at both ends of the bottom of the second sleeve 12, and the other end is fixedly connected to one end of the snap-fit ​​part 152; the other end of the snap-fit ​​part 152 abuts against the snap-fit ​​part of the valve seat, and its peripheral contour is adapted to the cross-sectional contour of the snap-fit ​​part of the valve seat.

[0041] In the above scheme, the circumferential surface of the connecting part 151 is slidably connected to the groove wall of the limiting groove 161 to form a radial guide structure. One end of the connecting part 151 is fixedly connected to the ball 14 at the bottom of the second sleeve 12, and the other end is fixedly connected to the snap-fit ​​part 152. When the push rod 13 pushes the ball 14 to move radially, the connecting part 151 slides vertically in the limiting groove 161. The vertical guidance of the limiting groove 161 and the contour adaptation of the snap-fit ​​part 152 work together to ensure that the top plate 15 expands only radially and does not shift or tilt. During the sliding process of the top plate 15, the connecting part 151 converts the displacement of the ball 14 into the radial expansion force of the snap-fit ​​part 152. When the connecting part 151 slides, the snap-fit ​​part 152 expands radially, and its end applies a uniform radial force to the inner wall of the valve seat. The matching circumferential contour ensures that the snap-fit ​​part 152 fits tightly with the inner wall of the valve seat, avoiding valve seat damage caused by local stress concentration.

[0042] The support plate 10 has a flange 101 extending from its edge toward the bottom of the second sleeve 12, and the inner wall of the flange 101 is in contact with the circumferential surface of the valve body.

[0043] In the above scheme, the edge of the support plate 10 extends towards the bottom of the second sleeve 12 to form a flange 101. The flange 101 is perpendicular or inclined to the support plate 10, and the inner wall of the flange 101 is tightly fitted with the circumferential surface of the valve body to form a surface contact structure. During the process of the push rod 13 pushing the ball 14 and the top plate 15 to expand, the flange 101 serves as a fixed reference to prevent damage to the valve seat caused by force deviation. Furthermore, the flange 101 disperses the self-weight of the device and the reaction force generated during operation to the circumferential surface of the valve body, avoiding deformation or breakage of the support plate 10 due to excessive local stress.

[0044] The end of the push rod 13 near the ball 14 has a tapered structure, and the end of the push rod 13 away from the ball 14 is fixedly provided with a handle 17.

[0045] In the above design, the end of the push rod 13 near the ball 14 is tapered. The contact point between the tapered tip and the ball 14 forms a high-stress concentration area. The contact area between the tapered slope and the ball 14 gradually increases as the push rod 13 advances, creating a progressive expansion force. When the ball 14 reaches its maximum radial displacement, it forms a self-locking mechanism, preventing damage to the device caused by excessive advancement of the push rod 13. The fixed design of the handle 17 prevents the push rod 13 from becoming eccentric during rotation or advancement, ensuring uniform force on the ball 14 and facilitating operation by the staff, thereby improving the disassembly efficiency of the valve body and valve seat.

[0046] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0047] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A valve body and valve seat disassembly device, characterized in that, It includes a support plate (10), a first sleeve (11), a second sleeve (12), a push rod (13), multiple balls (14), and two top plates (15); The support plate (10) is fastened to the end of the valve body. The first sleeve (11) is rotatably disposed at the center of the support plate (10); The outer wall of the second sleeve (12) is threadedly connected to the inner wall of the first sleeve (11); Multiple balls (14) are spaced apart at the bottom of the second sleeve (12), and their circumferential surfaces slide in contact with the inner bottom wall of the second sleeve (12); The two top plates (15) are symmetrically arranged at the bottom ends of the second sleeve (12), and one end of the two top plates (15) is fixedly connected to the adjacent ball (14), and the other end abuts against the inner wall of the valve seat. The push rod (13) is disposed inside the second sleeve (12). One end of the push rod (13) moves towards or away from the bottom of the second sleeve (12) along the axial length direction of the middle part of the second sleeve (12) and abuts against part of the circumferential surface of the ball (14).

2. The valve body and valve seat disassembly device according to claim 1, characterized in that, The inner wall of the first sleeve (11) and the outer wall of the second sleeve (12) form a first rotation path, and the inner wall of the middle part of the second sleeve (12) and the outer wall of the top rod (13) form a second rotation path. The first rotation path is opposite to the second rotation path.

3. The valve body and valve seat disassembly device according to claim 2, characterized in that, The second sleeve (12) has an inverted T-shaped structure. Limiting sleeves (16) are fixedly provided at both ends of the bottom of the second sleeve (12). Limiting grooves (161) are recessed from the axis of the two ends of the limiting sleeves (16) away from the second sleeve (12). The length direction of the limiting grooves (161) is perpendicular to the bottom axis of the second sleeve (12). The groove wall of the limiting groove (161) is in sliding contact with the corresponding top plate (15).

4. The valve body and valve seat disassembly device according to claim 3, characterized in that, The top plate (15) includes a connecting part (151) and a snap-fit ​​part (152); The peripheral surface of the connecting part (151) is slidably connected to the groove wall of the limiting groove (161), and one end of the connecting part (151) is fixedly connected to the ball bearings (14) at both ends of the bottom of the second sleeve (12), and the other end is fixedly connected to one end of the snap-fit ​​part (152). The other end of the snap-fit ​​part (152) abuts against the snap-fit ​​part of the valve seat, and its circumferential contour is adapted to the cross-sectional contour of the snap-fit ​​part of the valve seat.

5. The valve body and valve seat disassembly device according to claim 1, characterized in that, The support plate (10) has a flange (101) extending from its edge toward the bottom of the second sleeve (12), and the inner wall of the flange (101) is in contact with the circumferential surface of the valve body.

6. The valve body and valve seat disassembly device according to claim 1, characterized in that, The top rod (13) has a tapered structure at the end near the ball (14), and a handle (17) is fixedly provided at the end of the top rod (13) away from the ball (14).

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