High-sealing damping type valve seat

Abstract

The utility model discloses a high-sealing damping type valve seat which comprises a valve seat body, an elastic buffering seat, a supporting seat and a plurality of sets of elastic assemblies, a conical sealing face is arranged at an opening in the upper end of the valve seat body, and the elastic buffering seat is arranged in the valve seat body in a sliding mode in the axial direction. A limiting flange is arranged on the outer edge of the lower end of the elastic buffering seat, a limiting step used for forming up-stroke limiting for the limiting flange is arranged on the inner wall of the valve seat body, the supporting seat is installed at an opening in the lower end of the valve seat body, and the multiple sets of elastic assemblies are evenly distributed between the installation seat and the elastic buffering seat in a circumferential array mode. The valve clack can be buffered, huge vibration generated between the valve and the valve clack when the valve is closed is avoided, the function of protecting the valve is achieved, and meanwhile noise generated when the valve is closed is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-sealing shock-absorbing valve seat. Background Art

[0002] The closing principle of the stop valve is to rely on the axial pressure of the valve stem to make the valve disc sealing surface fit tightly with the valve seat sealing surface to prevent the medium from flowing from bottom to top. However, this structure is a forced sealing structure, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage.

[0003] Currently, the valve seat of a globe valve is installed inside the valve body. When the actuator drives the valve stem to move, the disc and the valve seat are engaged. This creates a rigid impact between the two, resulting in significant vibration. This not only reduces the service life of the components but also creates a lot of noise. Therefore, it is necessary to improve the existing valve seat to address the above issues. Utility Model Content

[0004] The purpose of the utility model is to provide a high-sealing shock-absorbing valve seat, which can cushion the valve disc to avoid huge vibration between the valve and the valve disc when the valve is closed, thereby protecting the valve and greatly reducing the noise when the valve is closed.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-sealing shock-absorbing valve seat, comprising a valve seat body, a conical sealing surface being provided at the opening at the upper end of the valve seat body, and also comprising an elastic buffer seat, a support seat and multiple groups of elastic components, the elastic buffer seat being axially slidably arranged in the valve seat body, and a limiting flange being provided at the outer edge of the lower end of the elastic buffer seat, a limiting step being provided on the inner wall of the valve seat body for constituting an upper stroke limit for the limiting flange, the support seat being installed at the opening at the lower end of the valve seat body, and multiple groups of elastic components being evenly distributed in a circular array between the mounting seat and the elastic buffer seat.

[0006] By adopting the above technical solution, the valve seat is installed inside the valve body. When the valve is closed, the valve disc first hits the elastic buffer seat to cause the elastic buffer seat to move downward. Since the two are in hard-soft contact, no violent vibration will be generated. Moreover, due to the resistance of the elastic component, the downward speed of the valve disc will slow down. Therefore, when the valve disc abuts the conical sealing surface of the valve seat body, the impact vibration generated by the contact between the two is greatly reduced, which has the effect of protecting the valve and also greatly reduces the noise when the valve is closed.

[0007] The present invention is further configured such that the elastic buffer seat comprises a metal frame and a rubber layer covering the outer periphery of the metal frame.

[0008] By adopting the above technical solution, the elastic buffer seat has good elasticity and can also obtain good rigid support, will not be easily deformed, and greatly improves its service life.

[0009] The present invention is further configured such that a plurality of reinforcing ribs are evenly arranged on the inner wall of the elastic buffer seat along the circumferential direction, and the reinforcing ribs are extended along the axial direction.

[0010] By adopting the above technical solution, the overall strength of the elastic buffer seat can be further improved, thereby increasing its service life.

[0011] The utility model is further configured such that a sealing ring is installed on the inner wall of the valve seat body and is used to form a sealing fit with the outer wall of the elastic buffer seat.

[0012] By adopting the above technical solution, the sealing between the valve seat body and the elastic buffer seat can be ensured. When the valve is closed, the valve seat body and the elastic buffer seat are in contact with the valve disc, achieving a double sealing effect, which greatly improves the sealing performance when the valve is closed.

[0013] The utility model is further configured as follows: the elastic component includes a guide rod and a reset spring sleeved on the outer circumference of the guide rod; the support seat is provided with a plurality of guide holes whose number is equivalent to that of the elastic component; one end of the guide rod is connected to the elastic buffer seat; the other end of the guide rod is inserted into the corresponding guide hole; the two ends of the reset spring are respectively pressed against the elastic buffer seat and the support seat.

[0014] By adopting the above technical solution, the spring force can be stably provided to the elastic buffer seat.

[0015] The utility model is further configured such that a plurality of screw holes, the number of which is equivalent to that of the elastic components, is opened at the lower end of the elastic buffer seat, a threaded section is provided at the upper end of the guide rod, the threaded section is threadedly connected to the corresponding screw holes, and an operating portion with a regular hexagonal cross-section is also provided on the outer periphery of the guide rod.

[0016] By adopting the above technical solution, the connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0017] The present invention is further configured such that the upper end of the support seat is provided with a plurality of positioning grooves whose number is equal to that of the elastic components, and the lower end of the return spring is embedded in the corresponding positioning grooves.

[0018] By adopting the above technical solution, the reset spring is positioned, which can prevent it from deforming away from the center axis direction, thereby protecting the reset spring.

[0019] The utility model is further configured to include multiple groups of locking components for connecting the support seat to the valve seat body, the locking components including a hexagonal threaded plug and a locking steel ball, a mounting groove is provided at the lower end opening of the valve seat body, the support seat is embedded in the mounting groove, an annular groove is provided on the outer periphery of the support seat, the upper end of the annular groove is an inclined surface, a plurality of locking holes corresponding to the number of the locking components are provided on the side of the valve seat body, and a threaded groove is provided at the outer end of each locking hole, the hexagonal threaded plug is threadedly connected to the corresponding threaded groove, the locking steel ball is provided in the corresponding locking hole, and when the hexagonal threaded plug is tightened, the locking steel ball partially extends into the annular groove.

[0020] By adopting the above technical solution, when tightening the hexagonal thread plug, the hexagonal thread plug will push the locking steel ball part into the annular groove, locking the support seat in the installation groove. When loosening the hexagonal thread plug, the support seat is pulled outward, and the inclined surface on the annular groove of the support seat will push the locking steel ball out of the annular groove, so that the support seat can be easily removed, and the operation is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the elastic component of the utility model in a free state;

[0022] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0023] Figure 3 This is a schematic diagram of the overall structure of the elastic component of the utility model when it is under pressure.

[0024] In the figure: 1. Valve seat body; 2. Conical sealing surface; 3. Elastic buffer seat; 4. Support seat; 5. Elastic component; 6. Limit flange; 7. Limit step; 8. Metal frame; 9. Rubber layer; 10. Reinforcement rib; 11. Sealing ring; 12. Guide rod; 13. Return spring; 14. Screw hole; 15. Threaded section; 16. Operating part; 17. Positioning groove; 18. Locking component; 19. Hexagon socket threaded plug; 20. Locking steel ball; 21. Mounting groove; 22. Annular groove; 23. Locking hole; 24. Threaded groove; 25. Guide hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example: As shown in the attached Figures 1 to 3 The high-sealing shock-absorbing valve seat shown includes a valve seat body 1, and a conical sealing surface 2 is provided at the upper end opening of the valve seat body 1. The valve seat also includes an elastic buffer seat 3, a support seat 4 and multiple groups of elastic components 5. The elastic buffer seat 3 is axially slidably arranged in the valve seat body 1, and a limiting flange 6 is provided at the outer edge of the lower end of the elastic buffer seat 3. The two are an integrated structure. A limiting step 7 is provided on the inner wall of the valve seat body 1 for limiting the upper stroke of the limiting flange 6. The support seat 4 is installed at the lower end opening of the valve seat body 1, and multiple groups of elastic components 5 are evenly distributed in a circular array between the mounting seat and the elastic buffer seat 3. The valve seat is installed inside the valve body. When the valve is closed, the valve disc first hits the elastic buffer seat 3 to cause the elastic buffer seat 3 to move downward. Since the two are in hard-soft contact, no violent vibration will be generated. Moreover, due to the resistance of the elastic component 5, the downward speed of the valve disc will be slowed down. Therefore, when the valve disc abuts against the conical sealing surface 2 of the valve seat body 1, the impact vibration generated by the contact between the two is greatly weakened, which has the effect of protecting the valve and also greatly reduces the noise when the valve is closed.

[0027] As attached Figure 1 As shown, the elastic buffer seat 3 includes a metal frame 8 and a rubber layer 9 covering the outer periphery of the metal frame 8. This design allows the elastic buffer seat 3 to have good elasticity while also obtaining good rigid support, and will not deform easily, thereby greatly improving its service life.

[0028] As attached Figure 1 As shown, a plurality of reinforcing ribs 10 are evenly arranged along the circumferential direction on the inner wall of the elastic buffer seat 3, and the reinforcing ribs 10 are extended along the axial direction. This design can further improve the overall strength of the elastic buffer seat 3, thereby increasing its service life.

[0029] As attached Figure 1 As shown, a sealing ring 11 is mounted on the inner wall of the valve seat body 1 to form a seal with the outer wall of the elastic buffer seat 3. Specifically, an annular groove is provided on the inner wall of the valve seat body 1, and the sealing ring 11 is embedded in this annular groove. This design ensures a tight seal between the valve seat body 1 and the elastic buffer seat 3. When the valve is closed, the valve seat body 1 and the elastic buffer seat 3 both abut against the valve disc, achieving a double seal effect and greatly improving the sealing performance of the valve when closed.

[0030] As attached Figure 1As shown, the elastic assembly 5 includes a guide rod 12 and a return spring 13 sleeved around the outer periphery of the guide rod 12. The support seat 4 is provided with a plurality of guide holes 25, the number of which is equivalent to that of the elastic assembly 5. One end of the guide rod 12 is connected to the elastic buffer seat 3, and the other end of the guide rod 12 is inserted into the corresponding guide hole 25. The guide rod 12 and the guide hole 25 are loosely matched, and the bottom end of the guide rod 12 is a dome structure. The two ends of the return spring 13 are respectively pressed against the elastic buffer seat 3 and the support seat 4. The elastic assembly 5 can stably provide spring force to the elastic buffer seat 3.

[0031] As attached Figure 1 As shown, the lower end of the elastic buffer seat 3 is provided with a plurality of screw holes 14, the number of which is equivalent to that of the elastic component 5. The upper end of the guide rod 12 is provided with a threaded section 15, which is an external thread and is threadedly connected to the corresponding screw hole 14. In addition, the outer periphery of the guide rod 12 is also provided with an operating portion 16 with a regular hexagonal cross-section. The regular hexagonal operating portion 16 facilitates the insertion of a wrench for applying a rotational force to the guide rod 12 and performing the disassembly and assembly of the guide rod 12. This design connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0032] As attached Figure 1 As shown, the upper end of the support base 4 is provided with a plurality of positioning grooves 17, the number of which is equal to that of the elastic component 5, and the lower end of the return spring 13 is embedded in the corresponding positioning grooves 17. The positioning grooves 17 are provided to position the return spring 13, thereby preventing it from deforming in the direction of the central axis and protecting the return spring 13.

[0033] As attached Figure 1 and attached Figure 2As shown, the valve seat also includes multiple groups of locking components 18 for connecting the support seat 4 to the valve seat body 1, the locking components 18 include a hexagonal threaded plug 19 and a locking steel ball 20, and a mounting groove 21 is provided at the lower end opening of the valve seat body 1, the support seat 4 is embedded in the mounting groove 21, and an annular groove 22 is provided on the outer periphery of the support seat 4, the upper end of the annular groove 22 is an inclined surface, and the lower end of the annular groove 22 is parallel to the horizontal plane and is used to abut with the locking steel ball 20 to form a limit, and the side of the valve seat body 1 is provided with a plurality of locking holes 23 with a number equivalent to the locking components 18, and a threaded groove 24 is provided at the outer end of each locking hole 23, the hexagonal threaded plug 19 is threadedly connected to the corresponding threaded groove 24, and the locking steel ball 20 is arranged in the corresponding locking hole 23. When the hexagonal threaded plug 19 is tightened, the locking steel ball 20 partially extends into the annular groove 22. When tightening the hexagonal thread plug 19, the hexagonal thread plug 19 will push the locking steel ball 20 partially into the annular groove 22, locking the support seat 4 in the installation groove 21. When loosening the hexagonal thread plug 19, the support seat 4 is pulled outward, and the inclined surface on the annular groove 22 of the support seat 4 will push the locking steel ball 20 out of the annular groove 22, so that the support seat 4 can be easily taken out, and the operation is very convenient.

Claims

1. A high-sealing shock-absorbing valve seat, comprising a valve seat body (1), wherein the upper opening of the valve seat body (1) is provided with a conical sealing surface (2), characterized in that: The valve seat (1) further comprises an elastic buffer seat (3), a support seat (4) and a plurality of elastic components (5), wherein the elastic buffer seat (3) is axially slidably arranged in the valve seat body (1), and a limiting flange (6) is provided at the outer edge of the lower end of the elastic buffer seat (3), and a limiting step (7) for constituting an upper stroke limit for the limiting flange (6) is provided on the inner wall of the valve seat body (1), the support seat (4) is installed at the lower end opening of the valve seat body (1), and the plurality of elastic components (5) are evenly distributed in a circular array between the mounting seat and the elastic buffer seat (3).

2. The high-sealing shock-absorbing valve seat according to claim 1, characterized in that: The elastic buffer seat (3) comprises a metal frame (8) and a rubber layer (9) covering the outer periphery of the metal frame (8).

3. The high-sealing shock-absorbing valve seat according to claim 1, characterized in that: A plurality of reinforcing ribs (10) are evenly arranged on the inner wall of the elastic buffer seat (3) along the circumferential direction, and the reinforcing ribs (10) are extended in the axial direction.

4. The high-sealing shock-absorbing valve seat according to claim 1, characterized in that: A sealing ring (11) is installed on the inner wall of the valve seat body (1) for forming a sealing fit with the outer wall of the elastic buffer seat (3).

5. The high-sealing shock-absorbing valve seat according to claim 1, characterized in that: The elastic component (5) comprises a guide rod (12) and a return spring (13) sleeved on the outer periphery of the guide rod (12); a plurality of guide holes (25) corresponding in number to the elastic component (5) are provided on the support seat (4); one end of the guide rod (12) is connected to the elastic buffer seat (3); the other end of the guide rod (12) is inserted into the corresponding guide hole (25); and the two ends of the return spring (13) are respectively pressed against the elastic buffer seat (3) and the support seat (4).

6. The high-sealing shock-absorbing valve seat according to claim 5, characterized in that: The lower end of the elastic buffer seat (3) is provided with a plurality of screw holes (14) whose number is equal to that of the elastic components (5); the upper end of the guide rod (12) is provided with a threaded section (15), the threaded section (15) being threadedly connected to the corresponding screw holes (14); and the outer periphery of the guide rod (12) is also provided with an operating portion (16) having a regular hexagonal cross section.

7. The high-sealing shock-absorbing valve seat according to claim 5, characterized in that: The upper end of the support seat (4) is provided with a plurality of positioning grooves (17) whose number is equal to that of the elastic components (5), and the lower end of the return spring (13) is embedded in the corresponding positioning grooves (17).

8. The high-sealing shock-absorbing valve seat according to claim 1, characterized in that: The invention also includes a plurality of locking components (18) for connecting the support seat (4) to the valve seat body (1), wherein the locking components (18) include a hexagonal threaded plug (19) and a locking steel ball (20), a mounting groove (21) is provided at the lower end opening of the valve seat body (1), the support seat (4) is embedded in the mounting groove (21), an annular groove (22) is provided on the outer periphery of the support seat (4), the upper end of the annular groove (22) is an inclined surface, a plurality of locking holes (23) corresponding to the number of the locking components (18) are provided through the side of the valve seat body (1), and a threaded groove (24) is provided at the outer end of each locking hole (23), the hexagonal threaded plug (19) is threadedly connected to the corresponding threaded groove (24), the locking steel ball (20) is provided in the corresponding locking hole (23), and when the hexagonal threaded plug (19) is tightened, the locking steel ball (20) partially extends into the annular groove (22).

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