An auxiliary positioning fixture for nested installation of valve seat inner seal

Abstract

This application relates to the technical field of valve processing, specifically disclosing an auxiliary positioning fixture for installing a valve seat inner sealing nest. The fixture includes a mounting plate with a placement groove for placing the valve seat. A clamping mechanism for positioning the valve seat on the mounting plate is also provided. A connecting rod is slidably mounted on the mounting plate, and a driving component for limiting the movement of the connecting rod is provided on the mounting plate. One end of the connecting rod has a spacer block for limiting and abutting the sealing nest. This application simplifies the disassembly and assembly process of the sealing nest and improves the installation efficiency of the sealing nest.

Description

Technical Field

[0001] This application relates to the field of valve processing technology, and in particular to an auxiliary positioning tool for nested installation of valve seat internal seals. Background Technology

[0002] Valves, as core control components in fluid transport systems, are widely used in chemical, energy, and water supply and drainage industries, with functions encompassing shut-off, regulation, flow diversion, and pressure control. In valve structural design, sealing performance is a key factor ensuring safe system operation, especially at the connection between the ball and seat, where the installation accuracy and reliability of the sealing nest directly affect the valve's sealing effect and service life.

[0003] In related technologies, the structure of a valve includes a valve seat, a valve cover, a valve stem, and a ball, wherein one end of the valve stem extends into the valve seat and is connected to the ball, and a sealing nest is provided at the connection between the ball and the valve seat to achieve a seal. When installing the sealing nest, first insert the sealing nest into the valve cavity through the upper opening of the valve seat, partially embedding it into the inlet or outlet of the valve seat. Then, install a placeholder block at the bottom of the valve stem and extend the placeholder block into the valve seat through the valve stem. The valve stem is then limited and fixed by the connection between the valve cover and the valve seat, thus positioning the placeholder block. Subsequently, a push rod with a tapered end is inserted from the inlet or outlet of the valve seat. The tapered surface at the end of the push rod abuts against the edge of the flow channel opening inside the sealing nest, causing the sealing nest to move to abut against the placeholder block. Continuing to apply pressure to the push rod causes the tapered surface at the end of the push rod to gradually extend into the sealing nest, thereby opening one end of the sealing nest. A stepped surface is formed on the inner wall of the valve seat corresponding to the position of the sealing nest. After the end of the sealing nest expands and deforms outward, it can be placed on the stepped surface, thus realizing the installation of the sealing nest.

[0004] In practical use, it was found that the installation of the sealing nest required disassembling and assembling the valve cover and valve stem assembly each time the sealing nest was installed, and then removing it again after use. The overall operation was quite cumbersome, resulting in low installation efficiency of the sealing nest. Utility Model Content

[0005] To simplify the disassembly and assembly process of the sealing nest and improve the installation efficiency of the sealing nest, this application provides an auxiliary positioning tool for installing the sealing nest inside the valve seat, which has the effect of improving the installation efficiency of the sealing nest.

[0006] The auxiliary positioning fixture for nested installation of valve seat inner seals provided in this application adopts the following technical solution:

[0007] An auxiliary positioning fixture for installing a valve seat inner seal nest includes a mounting plate with a placement groove for placing the valve seat. The mounting plate is provided with a clamping mechanism for positioning the valve seat on the mounting plate. A connecting rod is slidably mounted on the mounting plate. A driving component for limiting the position of the connecting rod is provided on the mounting plate. One end of the connecting rod is provided with a spacer block for limiting and abutting the seal nest.

[0008] By adopting the above technical solution, the placement groove on the mounting plate provides initial positioning space for the valve seat. In conjunction with the clamping mechanism, the valve seat can be positioned, reducing the valve seat from shifting during operation. By adjusting the position of the connecting rod through the drive component, when the connecting rod drives the occupant block to extend into the valve seat, the occupant block limits and abuts the sealing nest, facilitating the subsequent installation of the sealing nest. After installation, the connecting rod, occupant block, and clamping mechanism can be moved as a whole to detach from the valve seat, allowing the valve seat to be replaced. The overall operation is simple and effectively improves the installation efficiency of the sealing nest.

[0009] Optionally, the mounting plate includes a base plate, a column disposed on the base plate, and an upper plate that is inserted into and cooperates with the column. The placement groove is disposed on the base plate, the upper plate is disposed parallel to the base plate, one end of the connecting rod is slidably engaged with the upper plate, and a first locking member is provided on the upper plate to prevent the upper plate from detaching from the column.

[0010] By adopting the above technical solution, the end of the connecting rod is first aligned with the top of the valve seat. The upper plate then moves the connecting rod up and down along the column axis, which can adjust the distance between the connecting rod and the valve seat. By rotating the first locking member, the upper plate can be pressed down, thereby causing the connecting rod and the occupant block to extend into the valve seat. This facilitates adjustment of the height of the occupant block within the valve seat and also prevents the upper plate from detaching from the column.

[0011] Optionally, the driving component includes a rotating block, the upper plate is rotatably connected to the rotating block, and one end of the connecting rod is threadedly connected to the rotating block.

[0012] By adopting the above technical solution, the rotating block can be rotated to drive the connecting rod to move axially, which facilitates further adjustment of the depth of the occupant block into the valve seat, so that the position of the occupant block can be aligned with the sealing nest.

[0013] Optionally, a trapezoidal block is provided at the end of the connecting rod away from the rotating block, and a trapezoidal groove adapted to the trapezoidal block is provided on the occupant block, and the trapezoidal block is slidably connected in the trapezoidal groove.

[0014] By adopting the above technical solution, the trapezoidal block on the connecting rod is first passed through the trapezoidal groove on the occupant block, thus realizing the connection between the connecting rod and the occupant block. Then, by raising and lowering the upper plate on the column, the connecting rod and the occupant block can be inserted into or extended out of the valve seat as a whole, which facilitates multiple disassembly and replacement of the occupant block and is beneficial for the installation of sealing nesting for valve seats of different specifications.

[0015] Optionally, the clamping mechanism includes a sleeve and a pressure block. The sleeve is connected to the upper plate, the pressure block is located between the sleeve and the valve seat, the pressure block is threadedly connected to the sleeve, and the end of the pressure block away from the sleeve abuts against the valve seat. The pressure block has a through hole for the connecting rod to pass through.

[0016] By adopting the above technical solution, when the pressure block is rotated, it moves linearly along the axial direction, which facilitates the control of the pressure block's displacement. When the pressure block abuts against the top of the valve seat, the valve seat is fixed between the base plate and the pressure block, thereby pressing the valve seat and reducing the displacement or loosening of the valve seat during operation.

[0017] Optionally, a handwheel is provided on one end of the rotating block.

[0018] By adopting the above technical solution, the operator can easily drive the rotating block to rotate by rotating the handwheel, thereby controlling the lifting and lowering movement of the occupant block.

[0019] Optionally, it also includes a top rod that is slidably disposed on the base plate, one end of which is provided with a tapered surface.

[0020] By adopting the above technical solution, the occupant block limits the sealing nest from one side, while the tapered surface of the top rod abuts against the sealing nest from the other side. The two work together to constrain the position of the sealing nest, ensuring its stability during installation. When continuous pressure is applied to the top rod, its tapered surface penetrates deep into the sealing nest and abuts against the inclined surface inside, causing the sealing nest to deform and rest on the stepped surface, effectively improving its sealing performance.

[0021] Optionally, a fixing plate is provided on one side of the base plate, and a cavity is opened at the bottom of the fixing plate. A positioning rod is passed through the fixing plate, one end of the positioning rod is located in the cavity and is provided with a second locking member, and the other end of the positioning rod is provided with a limiting cylinder. The top rod is slidably engaged with the limiting cylinder.

[0022] By adopting the above technical solution, the sliding fit between the limiting cylinder and the push rod provides linear motion guidance for the push rod, reducing the risk of offset or wobbling during operation. Adjusting the height of the positioning rod on the mounting plate, and thus the height of the push rod, facilitates the installation of sealing nests for valve seats of different heights.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The placement groove on the mounting plate provides initial positioning space for the valve seat. With the clamping mechanism, the valve seat can be positioned, reducing the valve seat from shifting during operation. After the connecting rod drives the occupant block into the valve seat, the position of the occupant block is adjusted first. The connecting rod is limited by the driving component. Then, the occupant block limits and abuts against the sealing nest, which is beneficial to the accuracy of the sealing nest installation position. This application is simple to operate and effectively improves the installation efficiency of the sealing nest.

[0025] 2. By rotating the rotating block, the rotating block can drive the connecting rod to move axially, which facilitates further adjustment of the depth of the occupant block extending into the valve seat, so that the position of the occupant block can be aligned with the sealing nest;

[0026] 3. When the pressure block is rotated, it moves linearly along the axial direction, which makes it easy to control the displacement of the pressure block. When the pressure block abuts against the top of the valve seat, the valve seat is fixed between the base plate and the pressure block, thereby pressing the valve seat and reducing the displacement or loosening of the valve seat during operation. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the auxiliary positioning tool for the nested installation of the valve seat inner seal in this application;

[0028] Figure 2 This is a sectional view of the auxiliary positioning fixture for nested installation of the valve seat inner seal in this application.

[0029] Reference numerals: 1. Mounting plate; 101. Column; 102. Base plate; 103. Top plate; 2. Placement groove; 3. Clamping mechanism; 31. Sleeve; 32. Clamping block; 4. Connecting rod; 5. Placer block; 6. Top rod; 7. Embedded groove; 8. First locking element; 9. Driving component; 91. Rotating block; 10. Connecting hole; 11. Trapezoidal block; 12. Trapezoidal groove; 13. Hexagonal prism; 14. Handwheel; 15. Fixing plate; 16. Cavity; 17. Positioning rod; 18. Second locking element; 19. Limiting cylinder; 20. Connecting ring; 21. Bolt; 22. Elastic element; 23. Fixing seat; 24. Driving component; 25. Sealing nest; 26. Bearing; 27. Limiting ring; 28. Valve seat; 29. ​​Clamping groove. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0031] This application discloses an auxiliary positioning fixture for nested installation of an inner seal on a valve seat, referring to... Figure 1 and Figure 2The system includes a mounting plate 1 with a placement groove 2 that fits the bottom of the valve seat 28. A clamping mechanism 3 is installed on the mounting plate 1, located at the top of the valve seat 28. The clamping mechanism 3 positions the valve seat 28 within the placement groove 2 of the mounting plate 1, preventing the valve seat 28 from shaking or shifting. A connecting rod 4 is slidably connected to the mounting plate 1, and a spacer block 5 is installed on the connecting rod 4. The connecting rod 4 drives the spacer block 5 to extend into the valve seat 28, causing the side wall of the spacer block 5 to abut against the sealing nest 25, reducing movement of the sealing nest 25. A push rod 6 is also provided on the mounting plate 1. The push rod 6 passes through the inlet or outlet of the valve seat 28 and abuts against the end of the sealing nest 25 away from the spacer block 5 until the push rod 6 is embedded in the sealing nest 25. The sealing nest 25 then expands outward and rests on the stepped surface, thus fixing the sealing nest 25.

[0032] Reference Figure 1 and Figure 2 The mounting plate 1 includes a base plate 102, columns 101, and an upper plate 103. In this embodiment, two columns 101 are provided. The two columns 101 are respectively hinged to both ends of the base plate 102 and are parallel to each other. The valve seat 28 is located between the two columns 101, and the upper plate 103 is located on top of the valve seat 28. Both ends of the upper plate 103 are provided with grooves 7. The ends of the two columns 101 away from the base plate 102 are rotatably embedded in the grooves 7, realizing the parallel arrangement of the upper plate 103 and the base plate 102. The end of the connecting rod 4 away from the occupant block 5 is slidably engaged with the upper plate 103. The ends of the two columns 101 away from the base plate 102 are each fitted with a first locking member 8. In this embodiment, the first locking member 8 is a locking nut, and the first locking member 8 is threadedly connected to the column 101. Both first locking members 8 are located on the top of the upper plate 103.

[0033] Rotating the two first locking parts 8 presses down the upper plate 103, causing the upper plate 103 to drive the connecting rod 4 and the occupant block 5 to descend until the occupant block 5 extends into the valve seat 28. When the clamping mechanism 3 abuts against the top of the valve seat 28, the rotation of the first locking parts 8 can be stopped. At this time, the occupant block 5 is set to correspond to the sealing nest 25, thereby achieving the positioning of the sealing nest 25. When the occupant block 5 needs to be removed after use, simply remove the two first locking parts 8 from the two columns 101, and the upper plate 103, connecting rod 4 and occupant block 5 can be removed together, thereby replacing the valve seat 28 to be processed. Compared with the traditional solution, this effectively simplifies the installation process of the sealing nest 25 and improves the installation efficiency of the sealing nest 25.

[0034] Reference Figure 2The upper plate 103 is equipped with a drive component 9 for sliding the connecting rod 4, facilitating the adjustment of the extension length of the connecting rod 4 by the operator. The drive component 9 includes a rotating block 91, the axis of which is perpendicular to the upper plate 103. The upper plate 103 is rotatably connected to the rotating block 91, and the axial direction of the rotating block 91 is the same as that of the connecting rod 4. A connecting hole 10 is provided at one end of the rotating block 91 near the bottom plate 102. The inner wall of the connecting hole 10 is provided with an internal thread. The end of the connecting rod 4 away from the bottom plate 102 is provided with an external thread that matches the internal thread. The top end of the connecting rod 4 can be inserted into the connecting hole 10 and threadedly connected to the rotating block 91. The end of the connecting rod 4 away from the rotating block 91 can extend into the valve seat 28. By turning the rotating block 91, the connecting rod 4 can be moved up and down within the valve seat 28, allowing the operator to adjust the insertion depth of the connecting rod 4 according to different valve sizes, ensuring that the position of the occupant block 5 is aligned with the sealing nest 25.

[0035] A hexagonal prism 13 is fixed to one end of the rotating block 91 away from the connecting rod 4. A handwheel 14 is fixedly connected to the hexagonal prism 13. By rotating the handwheel 14, the rotating block 91 can be driven to rotate synchronously, which is convenient for operators to use.

[0036] Reference Figure 2 A bearing 26 is provided at the end of the rotating block 91 away from the connecting rod 4. A limit ring 27 is integrally formed on the top of the upper plate 103. The rotating block 91 is rotatably positioned within the limit ring 27 through the bearing 26.

[0037] Reference Figure 2 The clamping mechanism 3 includes a sleeve 31 and a pressure block 32. The sleeve 31 is located on the side of the upper plate 103 near the bottom plate 102. A connecting ring 20 is integrally formed at the top of the sleeve 31. A bolt 21 is threaded through the connecting ring 20. The bolt 21 passes through the upper plate 103 and is threadedly fixed to the upper plate 103, thereby fixing the sleeve 31 to the upper plate 103.

[0038] Reference Figure 2 The pressure block 32 is located between the sleeve 31 and the valve seat 28. The end of the sleeve 31 near the pressure block 32 has an external thread, and the end of the pressure block 32 near the sleeve 31 has a clamping groove 29. The inner wall of the clamping groove 29 has an internal thread that matches the external thread of the sleeve 31. The sleeve 31 and the pressure block 32 are threaded together. The pressure block 32 has a through hole for the connecting rod 4 to pass through. The connecting rod 4 passes through the through holes on the sleeve 31 and the pressure block 32 in sequence and then extends into the valve seat 28.

[0039] Reference Figure 2The pressure block 32, with one end near the valve seat 28, is embedded inside the valve seat 28 to position it, thus fixing the valve seat 28 between the base plate 102 and the pressure block 32. This reduces displacement or shaking of the valve seat 28 during operation and improves its stability. The threaded engagement between the pressure block 32 and the sleeve 31, as well as the threaded engagement between the connecting rod 4 and the rotating block 91, facilitates adjustment of the relative positions of the occupant block 5, the pressure block 32, and the upper plate 103 to accommodate valve seats 28 of different specifications.

[0040] Reference Figure 2 The connecting rod 4 has a trapezoidal block 11 integrally formed at the end away from the rotating block 91. The top of the occupant block 5 has a trapezoidal groove 12 that matches the trapezoidal block 11. The opening direction of the trapezoidal groove 12 is perpendicular to the moving direction of the top rod 6. The trapezoidal block 11 can be slidably embedded in the trapezoidal groove 12. In other embodiments, a threaded connection can also be used to achieve a detachable connection of the occupant block 5. First, the trapezoidal block 11 is embedded in the trapezoidal groove 12 on the occupant block 5. Then, the connecting rod 4 drives the occupant block 5 to extend from the top of the valve seat 28 into the valve seat 28, thereby fixing the occupant block 5. When disassembling the occupant block 5, the connecting rod 4 drives the occupant block 5 to move out of the valve seat 28 simultaneously. The trapezoidal block 11 slides out from the trapezoidal groove 12, which facilitates the installation and disassembly of the occupant block 5 and makes it easier to replace occupant blocks 5 of different sizes and models to fit different specifications of valve seats 28.

[0041] Reference Figure 2 A fixing plate 15 is integrally formed on one side of the base plate 102. A positioning rod 17 is vertically inserted through the fixing plate 15, and the positioning rod 17 is slidably engaged with the fixing plate 15. A cavity 16 is formed at the bottom of the fixing plate 15. One end of the positioning rod 17 is located in the cavity 16, and a second locking member 18 is threadedly connected to the bottom end of the positioning rod 17. In this embodiment, the second locking member 18 is a locking nut, which helps to prevent the positioning rod 17 from slipping out of the fixing plate 15.

[0042] Reference Figure 2 The other end of the positioning rod 17 is fixedly connected to the limiting cylinder 19. The push rod 6 is slidably engaged with the limiting cylinder 19. One end of the push rod 6 is integrally formed with a tapered surface, which can extend into the inlet or outlet of the valve seat 28 until it abuts against the inclined surface inside the sealing nest 25. The limiting cylinder 19 guides the movement of the push rod 6, reducing the displacement of the push rod 6. When it is necessary to install the sealing nest 25 in valve seats 28 of different specifications, the height of the positioning rod 17 is adjusted to drive the push rod 6 to rise or fall, so that the height of the push rod 6 can be adapted to the valve seats 28 with inlets or outlets of different heights.

[0043] Reference Figure 2An elastic element 22 is fitted onto the push rod 6. In this embodiment, the elastic element 22 is a spring, and both ends of the spring are fixedly connected to the limiting cylinder 19 and the fixing plate 15, respectively. When the push rod 6 is not in use, the positioning rod 17 drives the push rod 6 to move downward on the mounting plate 1 by its own weight. The end of the spring near the limiting cylinder 19 supports and abuts against the limiting cylinder 19, which helps to buffer the weight of the push rod 6 and makes it easy to reset the push rod 6 for the next use.

[0044] Reference Figure 1 A fixed seat 23 is also provided on one side of the base plate 102. A driving component 24 is installed on the top of the fixed seat 23. In this embodiment, the driving component 24 is a cylinder. The piston rod of the cylinder is connected to the push rod 6. The piston rod of the cylinder extends and retracts, thereby driving the push rod 6 to slide into the valve seat 28 and abut against the sealing nest 25. This facilitates the control of the push rod 6 to squeeze the sealing nest 25 and realize the outward deformation of the sealing nest 25.

[0045] The implementation principle of the auxiliary positioning fixture for the nested installation of the valve seat inner seal disclosed in this application is as follows: First, the trapezoidal block 11 at the end of the connecting rod 4 passes through the trapezoidal groove 12 of the occupant block 5, so that the connecting rod 4 and the occupant block 5 are combined together. Then, the two columns 101 are rotated to be embedded in the groove 7 of the upper plate 103. Then, the first locking member 8 is rotated so that the upper plate 103 moves downward on the columns 101. The upper plate 103 drives the connecting rod 4 and the occupant block 5 to move downward synchronously until the pressure block 32 abuts against the top of the valve seat 28. At this time, the occupant block 5 extends into the valve seat 28 and seals. Nest 25 is set to correspond to placeholder block 5; finally, the cylinder is activated, and the output end of the cylinder drives the end of the push rod 6 to abut against the end of the sealing nest 25 until the end of the sealing nest 25 away from the push rod 6 abuts against the placeholder block 5, and pressure is continuously applied to the push rod 6, so that the conical surface of the end of the push rod 6 is embedded in the sealing nest 25, until the sealing nest 25 expands and deforms and rests on the stepped surface in the valve seat 28, thereby realizing the positioning of the sealing nest 25; compared with the traditional technical solution, the installation process of the sealing nest 25 is effectively simplified and the installation efficiency of the sealing nest 25 is improved.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An auxiliary positioning tool for nest installation of an inner seal of a valve seat, characterized in that: The device includes a mounting plate (1), which has a placement groove (2) for placing a valve seat (28). The mounting plate (1) is provided with a clamping mechanism (3) for positioning the valve seat (28) on the mounting plate (1). A connecting rod (4) is slidably provided on the mounting plate (1). A driving component (9) for driving the connecting rod (4) to slide is provided on the mounting plate (1). One end of the connecting rod (4) is provided with a occupant block (5). The occupant block (5) is used to extend into the valve seat (28) to limit and abut against the sealing nest (25).

2. The auxiliary positioning tool for the installation of the valve seat inner sealing nest according to claim 1, characterized in that, The mounting plate (1) includes a base plate (102), a column (101) disposed on the base plate (102), and an upper plate (103) that is inserted into the column (101). The placement groove (2) is disposed on the base plate (102). The upper plate (103) is disposed parallel to the base plate (102). One end of the connecting rod (4) is slidably engaged with the upper plate (103). The upper plate (103) is provided with a first locking member (8), which is used to prevent the upper plate (103) from detaching from the column (101).

3. The auxiliary positioning tool for the installation of the valve seat inner sealing nest according to claim 2, characterized in that, The driving component (9) includes a rotating block (91), the upper plate (103) is rotatably connected to the rotating block (91), and one end of the connecting rod (4) is threadedly connected to the rotating block (91).

4. The auxiliary positioning tool for the installation of the valve seat inner sealing nest according to claim 3, characterized in that, The connecting rod (4) is provided with a trapezoidal block (11) at one end away from the rotating block (91). The occupant block (5) is provided with a trapezoidal groove (12) that is adapted to the trapezoidal block (11). The trapezoidal block (11) is slidably connected in the trapezoidal groove (12).

5. The auxiliary positioning tool for the installation of the valve seat inner sealing nest according to claim 2, characterized in that, The pressing mechanism (3) includes a sleeve (31) and a pressing block (32). The sleeve (31) is connected to the upper plate (103). The pressing block (32) is located between the sleeve (31) and the valve seat (28). The pressing block (32) is threadedly connected to the sleeve (31). The end of the pressing block (32) away from the sleeve (31) abuts against the valve seat (28). The pressing block (32) has a through hole for the connecting rod (4) to pass through.

6. The auxiliary positioning fixture for nested installation of the valve seat inner seal according to claim 3, characterized in that, A handwheel (14) is provided on the rotating block (91).

7. The auxiliary positioning tool for the installation of the valve seat inner sealing nest according to claim 2, characterized in that, It also includes a top rod (6) that is slidably disposed on the base plate (102), and one end of the top rod (6) is provided with a tapered surface.

8. The auxiliary positioning tool for the installation of the valve seat inner sealing nest according to claim 7, characterized in that, A fixing plate (15) is provided on one side of the base plate (102). A cavity (16) is provided at the bottom of the fixing plate (15). A positioning rod (17) is provided on the fixing plate (15). One end of the positioning rod (17) is located in the cavity (16) and is provided with a second locking member (18). The other end of the positioning rod (17) is provided with a limiting cylinder (19). The top rod (6) slides in cooperation with the limiting cylinder (19).

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