A valve sleeve removal tool

Abstract

The present invention discloses a valve sleeve removal tool, including a supporting guide frame, a clamp in the frame to collect the pulling force of the screw and the guide of the guide rod, and remove the valve sleeve from the valve body. The clamp is composed of two parts, and a plug screw and a plug are arranged between the two parts of the clamp. The plug has a rectangular cross section, which can lock the clamping force between the clamp and the valve sleeve to prevent the valve sleeve from falling off the claws of the clamp. The lower support plate adapted to the valve body size can be replaced according to the size of the valve body, which has stronger versatility, can significantly shorten the working hours of the process, improve the maintenance efficiency, and truly achieve rapidity. This product provides great convenience for the removal of the valve sleeve, shortens the production time of this process of the product, and improves the maintenance efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of valve sleeve repair, and in particular to a valve sleeve removal tool. Background Art

[0002] During the operation of removing the valve sleeve, the clamping part of the universal extractor is prone to loosening inward along the vertical direction of the removal movement, which will damage the inner surface of the valve sleeve and the removal efficiency is very low, which is not conducive to the maintenance work and affects the maintenance status and efficiency. Although there are many types of such extraction tools, they are not suitable for the removal of various valve sleeves in our company. In order to improve the work efficiency and the stability of the product installation process, to achieve rapidity and precision, to achieve the removal efficiency of the valve sleeve and the removal and maintenance process is not limited by factors such as personnel, it is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a valve sleeve removal tool, which prevents the valve sleeve clamp from being easily loosened inward when being removed from a designated position of the valve sleeve along a vertical removal direction, so that the valve sleeve can be removed from the valve body in its original state.

[0004] The technical solution adopted by the present invention is a valve sleeve removal tool, comprising a clamp and a support guide frame, the clamp is composed of two symmetrical parts, a spring is arranged between the two parts, one end of the lower end of the clamp that can be inserted into the valve sleeve is a claw head, the upper end of the clamp is a support arm, the two support arms respectively pass through the force frame and can move horizontally along the force frame, and the force frame is fixed on the reinforcement plate;

[0005] A plug is provided between the two clamps, the lower end of the plug extends to the claw head, the upper end of the plug is fixed on the plug screw and rotates with the screw, the cross section of the position where the plug is flush with the claw head is flat and long, the plug screw is screwed on the reinforcement plate, the plug screw rotates on the reinforcement plate, driving the plug to rotate, the plug pushes the claw head outward, and touches the inner wall of the valve sleeve;

[0006] The supporting guide frame comprises peripheral guide rods, and both ends of the reinforcing plate are guided by the guide rails to move up and down, and the reinforcing plate is connected with an up and down driving mechanism.

[0007] The support arm at the upper end of the clamp is U-shaped, the openings of the two U-shaped support arms are opposite to each other, and the upper arms of the U-shaped support arms pass through the force-bearing frame.

[0008] The cross section of the insert is rectangular, or a rectangle with rounded corners.

[0009] The insert piece extends upward and is higher than the upper end surface of the insert piece screw.

[0010] The supporting guide frame also includes a pulling-out mechanism, which pulls the reinforcing plate to move upward.

[0011] The pulling-out mechanism includes a force-bearing plate and an upper supporting plate. The lower end of the force-bearing plate is fixed to the reinforcing plate. A threaded hole is provided on the upper end of the force-bearing plate. The removal screw passes through the upper supporting plate and cooperates with the thread of the reinforcing plate. The force-bearing plate and the reinforcing plate maintain a distance. A heightening block is provided between the end of the removal screw and the upper supporting plate. The inner diameter of the heightening block is larger than the outer diameter of the threaded part of the removal screw.

[0012] An auxiliary guide rod is also connected to the side wall of the force-bearing plate, and the outer end of the auxiliary guide rod is slidably matched with the guide rail.

[0013] The load-bearing plate is in a "X" shape, and the connection between the load-bearing plate and the reinforcing plate is close to the outer edge of the reinforcing plate.

[0014] It also includes a lower support plate, both ends of which are connected to the guide rod screws, and an opening is provided in the middle of the lower support plate, which is adapted to the valve body.

[0015] The height of the supporting guide frame is not greater than twice the width, and the removal screw and the insert screw are coaxially installed.

[0016] The beneficial effect of the present invention is that when the valve sleeve removal tool is used to remove the valve sleeve, the valve sleeve removal efficiency is improved while ensuring that the valve sleeve is removed in its original state, the working hours of the process can be significantly shortened, the maintenance efficiency can be improved, and the product can be truly rapid. This product provides great convenience for the removal of the valve sleeve, shortens the production time of this process of the product, and improves the maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a diagram showing the state of the clamp extending into the valve body.

[0018] Figure 2 The valve body is taken out by the clamp.

[0019] Figure 3 This is a structural diagram of the single-chip clamp.

[0020] Figure 4 This is the structure diagram of the insert screw.

[0021] Figure 5 This is the insert structure diagram.

[0022] Figure 6 The following is a diagram of the nut structure.

[0023] Marked in the figure are: upper support 11, lower support plate 12, guide rod 13, removal screw 21, raising block 22, auxiliary guide 31, reinforcing plate 32, force frame 33, force plate 34, insert screw 41, insert 42, clamp head 43, clamping ear 44, clamp 50, straight arm section 51, spring 52, claw head 53, valve sleeve 72, valve body 71. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] The valve sleeve removal tool of the present application is mainly used to remove the valve sleeve with the sealing ring from the valve body. The valve sleeve removal tool mainly consists of an upper support plate 11, an auxiliary guide 31, a guide rod 13, a reinforcing plate 32, a force plate 34, a force frame 33, an insert 41, an insert screw 42, a removal screw 21, a heightening block 22, a spring, a lower support plate 12 and a clamp 50, as shown in the attached Figure 1 shown.

[0026] The upper support plate 11, the guide rod 13 and the lower support plate 12 constitute a support guide frame of the valve sleeve removal tool, which is used to form an external frame of the valve sleeve removal tool, see the attached Figure 1 The upper support plate 11, the guide rod 13 and the lower support plate 12 in the valve sleeve removal tool. The reinforcing plate 32, the force plate 34, the force frame 33, the auxiliary guide 31, the removal screw 21 and the heightening block 22 constitute the force-bearing part of the valve sleeve removal tool. The force plate 34 and the removal screw 21 slide on the guide rod 13 through thread transmission with the assistance of the auxiliary guide 31, providing working power for the valve sleeve removal tool. The clamp 50, the insert 42, the insert screw 41 and the spring 52 constitute the removal unit. The clamp 50 expands outward under the action of the spring 52 to form the initial state of the clamp. The upper ends of the clamps are each mounted on the force frame 33 and can move horizontally along the force frame. A cavity is maintained in the middle of the upper end for accommodating the spring and the spring seat. The middle part of the clamp is a straight arm section that is close to and parallel to each other. There is a claw head 53 at the end of the straight arm section. When the clamp 50 is in the retracted state, the claw head 53 can be extended into the valve sleeve 72 and touch the inner wall thereof. The shape of the claw head 53 can be modified according to the internal structure of different valve sleeves.

[0027] The valve sleeve removal tool is used by first compressing the spring 52, closing the clamp 50, and retracting the claw heads 53. After the closed claw heads 53 of the clamp are inserted into the clampable part inside the valve sleeve, the clamp is released. Under the tension of the spring, the clamp remains open, and the claw heads 53 touch the inner wall of the valve sleeve 72. After the lower support plate 12 is placed in a suitable position in contact with the valve body 71, the insert screw 42 is rotated, and the insert screw drives the insert 41 to rotate. The insert 41 is rectangular. After rotation, the insert 41 further squeezes the straight arm section 51 outward until the insert 41 cannot rotate. At this time, the straight arm section 51 and the claw heads 53 are supported by the insert 41, leaving no room for retraction. The insert screw 42 is self-locking to prevent the insert 41 from loosening the contact force on the clamp during the removal process due to rotation. Then, the removal screw 21 is rotated, and the removal screw 21 moves upward as a whole, driving the force plate 34, the force frame 33, and the clamp to move upward. Driven by the clamp 50, the valve sleeve moves in the removal direction, and the valve sleeve is removed from the valve body.

[0028] The insert screw 41 is installed on the reinforcing plate 32, with the screw head above the reinforcing plate 32 and the nut below the reinforcing plate 32. After the insert screw 41 is screwed to the limit position, the nut is further tightened to tighten the position of the insert screw. The nut is provided with two clamping ears 44, which are symmetrically arranged on the periphery of the nut, so that a large screwing torque can be applied to the nut without the aid of tools. The clamping ears are wide at the upper end and narrow at the lower end, which not only meets the convenience of screwing, but also reduces the space occupied by the nut and avoids space interference during operation. The upper end of the insert 42 is a clamp head, which is larger than the opening on the insert screw 41, limiting the downward movement of the insert 42.

[0029] The removal action can also be completed by other implementations, such as a gear rack mechanism. In order to ensure the symmetry of the structure and the smooth operation, the gear rack must also adopt a symmetrical structure, such as the combination of double racks and one gear, or the combination of two gears and one rack. However, its stability is far less than the implementation method using the removal screw 21.

[0030] During the removal process, it is very easy for the clamp 50 to slip off the inner wall of the valve sleeve. In order to prevent the clamping force between the clamp 50 and the valve sleeve from being relaxed and unstable, many methods are adopted in the industry. The most common method is to press the cam downward to expand the clamp outward. However, this force is applied in the vertical direction, which is converted into the horizontal direction through the cam structure. However, this structure still has some vertical separation when transmitted to the claw head 51, which will cause the pressure on the upper and lower edges of the claw head and the inner wall of the valve sleeve to be different. Excessive pressure will cause damage to the inner wall of the valve sleeve, and uneven force will make it more likely to slip. When force is applied in the vertical direction, the downward force will be affected and fluctuate as the removal action starts and stops, and unstable force will easily cause slippage. The insert 42 and insert screw 41 of the present application are installed on the reinforcing plate 32, and move up and down together under the drive of the extraction screw, wherein the force plate 34 is directly driven by the extraction screw 21, and the reinforcing plate 32 and the force plate 34 are connected by screws. After two levels of buffering, this structure buffers the impact on the insert when the extraction action starts and stops, and further ensures the stability of the insert 42 during the extraction process. Furthermore, the present application uses the insert 41 to directly apply horizontal external tension to the clamp 50, the entire clamp is evenly stretched, the force acting on the clamp is also very uniform, the force between the clamp's claw head 53 and the valve sleeve inner wall bracket is also very uniform, and the technical solution of the present application has uniform force in the structure, and the uniform force further ensures the stability of the entire extraction process.

[0031] In order to further improve the stability of the removal process, the technical solution of the present application is also provided with an auxiliary guide 31, which is not only a guide, but also for the stability of the removal process, wherein the reinforcing plate 32 moves along the guide rod 13, and the force-bearing plate 34 is guided along the guide rod 13 through the auxiliary guide 31. A double guide is maintained at a distance between the reinforcing plate 32 and the auxiliary guide 31 to ensure that the two move up and down and are stable and synchronous left and right. Once there is a deviation in the moving speed of the left and right sides of the reinforcing plate, the plate surface will be tilted, and the center line of the clamp will deviate from the valve sleeve axis, that is, deviate from the valve sleeve removal direction, which is an important factor leading to slippage.

[0032] In order to provide sufficient buffering effect, the technical solution of the present application includes multiple structural parts such as the force-bearing plate 34, the reinforcing plate 32, the force-bearing frame 33, etc., which are connected to each other. In order to effectively ensure the stability and accuracy of movement at the same time, double guidance is adopted in the structural setting. The height of the supporting guide frame is not more than twice the width, and the screws and the insert screws are removed and installed coaxially.

[0033] The load-bearing plate 34 is in a "X" shape, and the connection between the load-bearing plate 34 and the reinforcing plate 32 is close to the outer edge of the reinforcing plate, so that good stability is maintained between the two to prevent shaking.

[0034] The lower support plate has an opening in the middle, which is adapted to the valve body. Both ends of the lower support plate are connected with guide rod screws and can be disassembled and replaced. Different lower support plates can be used according to different valve bodies. The valve sleeve removal tool can be applied to different valve bodies, and the versatility is greatly increased.

[0035] The technical solution of the present application improves the efficiency of valve sleeve removal when using a valve sleeve removal tool to remove the valve sleeve while ensuring that the valve sleeve is removed in its original state. It can significantly shorten the working hours of this process, improve maintenance efficiency, and truly achieve rapidity. This product provides great convenience for the removal of the valve sleeve, shortens the production time of this process of the product, and improves maintenance efficiency.

Claims

1. A valve sleeve removal tool, comprising a holder and a support guide frame, characterized in that: The clamp is composed of two symmetrical parts, with a spring arranged between the two parts. The lower end of the clamp that can be inserted into the valve sleeve is a claw head, and the upper end of the clamp is a support arm. The two support arms pass through the force frame respectively and can move horizontally along the force frame. The force frame is fixed on the reinforcement plate. A plug is provided between the two clamps, the lower end of the plug extends to the claw head, the upper end of the plug is fixed on the plug screw and rotates with the screw, the cross section of the position where the plug is flush with the claw head is flat and long, the plug screw is screwed on the reinforcement plate, the plug screw rotates on the reinforcement plate, driving the plug to rotate, the plug pushes the claw head outward, and touches the inner wall of the valve sleeve; The supporting guide frame includes peripheral guide rods, and both ends of the reinforcing plate are guided to move up and down by the guide rods, and the reinforcing plate is connected with an up and down driving mechanism; The support guide frame also includes a pull-out mechanism, which pulls the reinforcement plate to move upward; The extraction mechanism includes a force-bearing plate and an upper support plate. The lower end of the force-bearing plate is fixed to the reinforcing plate. A threaded hole is provided on the upper end of the force-bearing plate. The extraction screw passes through the upper support plate and cooperates with the thread of the reinforcing plate. The force-bearing plate and the reinforcing plate are kept at a distance. A heightening block is provided between the end of the extraction screw and the upper support plate. The inner diameter of the heightening block is larger than the outer diameter of the threaded part of the extraction screw. The side wall of the force-bearing plate is also connected with an auxiliary guide rod, and the outer end of the auxiliary guide rod is slidably matched with the guide rod; It also includes a lower support plate, both ends of which are connected to the guide rod screws, and an opening is provided in the middle of the lower support plate, which is adapted to the valve body.

2. The valve sleeve removal tool according to claim 1, characterized in that: The support arm at the upper end of the clamp is U-shaped, the openings of the two U-shaped support arms are opposite to each other, and the upper arms of the U-shaped support arms pass through the force-bearing frame.

3. The valve sleeve removal tool according to claim 1, characterized in that: The cross section of the insert is rectangular.

4. The valve sleeve removal tool according to claim 1, characterized in that: The cross section of the insert is a rectangle with rounded corners.

5. The valve sleeve removal tool according to claim 1, characterized in that: The insert piece extends upward and is higher than the upper end surface of the insert piece screw.

6. The valve sleeve removal tool according to claim 1, characterized in that: The load-bearing plate is in a "X" shape, and the connection between the load-bearing plate and the reinforcing plate is close to the outer edge of the reinforcing plate.

7. The valve sleeve removal tool according to claim 1, characterized in that: The height of the support guide frame is no more than twice the width, and the removal screw and the insert screw are coaxially installed.

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