Valve clack buffering device of reversing valve

Abstract

The utility model discloses a valve clack buffering device of a reversing valve, which comprises a valve body, a valve rod and a valve clack are arranged on the valve body, a valve seat which is in sealing fit with the valve clack is arranged on the valve body, two inlet flow channels and a single outlet flow channel are arranged on the valve body, and a buffering assembly is arranged on one side, facing the valve seat, of the valve clack in a sliding mode. The buffer assembly comprises an abutting panel, an elastic part, a supporting seat and a locking part, the valve clack is arranged on the side, facing the outlet flow channel, of the supporting seat in a sleeving mode, the abutting panel is arranged on the valve clack in a sliding fit mode, the elastic part is clamped between the abutting panel and the supporting seat, and the locking part sequentially penetrates through the abutting panel and the elastic part and is screwed on the valve rod. According to the valve clack buffering device of the reversing valve, the impact force generated when the valve clack and the valve seat are sealed is reduced, and the service life of the valve clack is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve disc buffer device of a reversing valve. Background Art

[0002] A directional control valve is a directional control valve with two or more flow forms and two or more oil ports. It is a valve that realizes the communication, cutting off and reversing of hydraulic oil flow, as well as pressure unloading and sequential action control. It relies on the directional control valve of the relative movement of the valve core and the valve body. The number of working positions in which the valve core stays in the valve body is divided into two and three positions; it is divided into two-way, three-way, four-way and six-way according to the number of oil circuits connected to the valve body; the ways to operate the valve core movement include manual, motorized, electric, hydraulic, electro-hydraulic and other types. Due to the large number of channels connected to the valve body, the pressure of the medium on the valve disc is higher than that of the one-way valve, which increases the impact force between the valve and the valve seat in the closed state, which can easily lead to damage to the valve disc and reduce the service life of the valve disc. Utility Model Content

[0003] In view of the above problems, the utility model proposes a valve disc buffer device for a reversing valve, which reduces the impact force when the valve disc and the valve seat are sealed and increases the service life of the valve disc.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a valve disc buffer device of a reversing valve, comprising a valve body, a valve stem and a valve disc mounted on the valve body, a valve seat provided on the valve body for forming a sealing fit with the valve disc, two inlet flow channels and a single outlet flow channel are provided on the valve body, a buffer assembly is provided on the side of the valve disc sliding toward the valve seat, the buffer assembly comprises an abutment panel, an elastic member, a support seat and a locking member, the valve disc is sleeved on the side of the support seat facing the outlet flow channel, the abutment panel slides onto the valve disc, the elastic member is clamped between the abutment panel and the support seat, and the locking member passes through the abutment panel and the elastic member in sequence and is tightened on the valve stem.

[0005] By adopting the above technical solution, when the valve is closed, the abutment panel forms an elastic abutment with the valve seat through the elastic member, reducing the impact force between the valve disc and the valve seat, and the abutment panel cooperates with the sliding of the valve disc to stabilize the telescopic sliding stroke, and the support seat provides a fixed bearing function for the valve disc, the elastic member and the abutment panel, reducing the impact force when the valve disc and the valve seat are sealed, and improving the service life of the valve disc.

[0006] The utility model is further configured such that the support seat is provided with a pressure boss on the side facing the outlet flow channel, the pressure boss is provided with a pressing surface, an inclined surface and a positioning surface, the valve disc is provided with a sealing portion, an extension portion and a mounting portion, the sealing portion is attached to the pressing surface, one end of the extension portion is connected to the sealing portion and bends and extends toward one side of the valve stem, and one end of the mounting portion is connected to the extension portion and is clamped on the positioning surface.

[0007] By adopting the above technical solution, the valve disc can be prevented from loosening and falling during use, and it is installed in a manner of fitting tightly against the pressure boss, which can fully transmit the clamping force brought by the support seat.

[0008] The utility model is further configured such that the sealing portion is provided with a first sealing flange protruding toward the pressing surface, and a first sealing groove adapted to the first sealing flange is provided on the pressing surface; the mounting portion is provided with a second sealing flange protruding toward the positioning surface, and a second sealing groove adapted to the second sealing flange is provided on the positioning surface.

[0009] By adopting the above technical solution, the first sealing flange is embedded in the first sealing groove, which has a good fixing effect on the pressing surface and prevents the pressing surface from falling off. The second sealing flange on the mounting part and the second sealing groove form an embedded mounting effect, which is not easy to fall off.

[0010] The present invention is further configured such that a ring array of sliding grooves is provided on the inner circumferential surface of the extension portion facing the abutting panel, a sliding portion adapted to the sliding groove is provided on a protrusion of the abutting panel, and the sliding portion is slidingly fitted in the sliding groove.

[0011] By adopting the above technical solution, the abutment panel and the valve disc form a sliding fit, and at the same time can limit and fix the valve disc. The abutment panel can contact the valve seat first through the force of the elastic part, reducing the impact force between the valve disc and the valve seat.

[0012] The utility model is further configured such that a first mounting hole is provided on the abutting panel, a second mounting hole is provided on the supporting seat, a third mounting hole is provided on the valve stem, and the locking member passes through the first mounting hole and the second mounting hole in sequence and is tightened in the third mounting hole.

[0013] By adopting the above technical solution, the stability of the overall structure is increased, and at the same time, the sliding formation of the abutting panel is limited.

[0014] The present invention is further configured such that a positioning groove is provided on one side of the abutting panel toward the support seat, the elastic member is sleeved on the locking member with one end pressed against the positioning groove and the other end pressed against the support seat, and a sliding gap is provided between the abutting panel and the support seat.

[0015] By adopting the above technical solution, the elastic member can be stably positioned in the positioning groove during telescopic operation, thereby avoiding distortion.

[0016] The present invention is further configured such that the sliding groove and the sliding portion are configured to be gradually reduced toward one side of the valve stem.

[0017] By adopting the above technical solution and a sloped structural design, the smoothness and stability during sliding are improved and interference between structures is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is an enlarged view of part A of the present utility model.

[0020] In the figure, 1. valve body; 2. valve stem; 3. valve disc; 4. valve seat; 5. inlet flow channel; 8. outlet flow channel; 9. buffer assembly; 10. abutment panel; 11. elastic member; 12. support seat; 13. locking member; 14. pressure boss; 15. pressing surface; 16. inclined surface; 17. positioning surface; 18. sealing portion; 19. extension portion; 20. mounting portion; 21. first sealing flange; 23. first sealing groove; 24. second sealing flange; 25. second sealing groove; 26. slide groove; 27. sliding portion; 28. first mounting hole; 29. second mounting hole; 30. third mounting hole; 31. positioning groove. DETAILED DESCRIPTION

[0021] 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.

[0022] Example: As shown in the attached Figure 1 and attached Figure 2The valve disc buffer device of a reversing valve shown in the figure includes a valve body 1, on which a valve stem 2 and a valve disc 3 are installed, and a valve seat 4 is provided on the valve body 1 to form a sealing fit with the valve disc 3. Two inlet flow channels 5 and a single outlet flow channel 8 are provided on the valve body 1, and a buffer component 9 is provided on the side of the valve disc 3 sliding toward the valve seat 4. The buffer component 9 includes an abutment panel 10, an elastic member 11 (specifically a pressure spring), a support seat 12 and a locking member 13 (specifically a bolt). The valve disc 3 is sleeved on the support seat 12 and on the side facing the outlet flow channel 8. The abutment panel 10 slides with the valve disc 3. It is closed on the valve disc 3, and the elastic member 11 is clamped between the abutment panel 10 and the support seat 12. The locking member 13 passes through the abutment panel 10 and the elastic member 11 in sequence and is tightened on the valve stem 2. When the valve is closed, the abutment panel 10 forms an elastic abutment with the valve seat 4 through the elastic member 11, reducing the impact force between the valve disc 3 and the valve seat 4, and the abutment panel 10 stabilizes the telescopic sliding stroke through the sliding cooperation with the valve disc 3. The support seat 12 provides a fixed bearing effect for the valve disc 3, the elastic member 11 and the abutment panel 10, reducing the impact force when the valve disc 3 and the valve seat 4 are sealed, and improving the service life of the valve disc 3.

[0023] As attached Figure 2 As shown, the support seat 12 is provided with a pressure boss 14 (an integrated structure) on the side facing the outlet flow channel 8, and the pressure boss 14 is provided with a pressing surface 15, an inclined surface 16 and a positioning surface 17. The valve disc 3 is provided with a sealing portion 18, an extension portion 19 and a mounting portion 20 (an integrated structure and made of rubber). The sealing portion 18 is fitted on the pressing surface 15, and one end of the extension portion 19 is connected to the sealing portion 18 and bends and extends toward the side of the valve stem 2. One end of the mounting portion 20 is connected to the extension portion 19 and is clamped on the positioning surface 17, which can prevent the valve disc 3 from loosening and falling during use. It is installed in a manner of fitting and pressing against the pressure boss 14, which can fully transmit the pressing force brought by the support seat 12.

[0024] As attached Figure 2 As shown, the sealing portion 18 is provided with a first sealing flange 21 (an integrated structure) protruding toward the side of the pressing surface 15, and a first sealing groove 23 adapted to the first sealing flange 21 is provided on the pressing surface 15. The mounting portion 20 is provided with a second sealing flange 24 (an integrated structure) protruding toward the side of the positioning surface 17, and a second sealing groove 25 adapted to the second sealing flange 24 is provided on the positioning surface 17. The first sealing flange 21 is embedded in the first sealing groove 23, which has a good fixing effect on the pressing surface 15 and prevents the pressing surface 15 from falling off. The second sealing flange 24 and the second sealing groove 25 on the mounting portion 20 form an embedded installation effect, which is not easy to fall off.

[0025] As attached Figure 2As shown, the inner circumferential surface of the extension portion 19 on the side of the abutment panel 10 is provided with a ring-shaped array of sliding grooves 26, and the abutment panel 10 is protruded with a sliding portion 27 (an integrated structure) adapted to the sliding groove 26. The sliding portion 27 is slidingly fitted in the sliding groove 26, and the abutment panel 10 forms a sliding fit with the valve disc 3, and at the same time can limit and fix the valve disc 3. The abutment panel 10 can contact the valve seat 4 first through the force of the elastic member 11, thereby reducing the impact force between the valve disc 3 and the valve seat 4.

[0026] As attached Figure 2 As shown, a first mounting hole 28 is provided on the abutting panel 10, a second mounting hole 29 is provided on the supporting seat 12, and a third mounting hole 30 is provided on the valve stem 2. The locking member 13 passes through the first mounting hole 28 and the second mounting hole 29 in sequence and is tightened in the third mounting hole 30, thereby increasing the stability of the overall structure and limiting the sliding formation of the abutting panel 10.

[0027] As attached Figure 2 As shown, the abutment panel 10 is provided with a positioning groove 31 on the side facing the support seat 12, the elastic member 11 is sleeved on the locking member 13 and one end is pressed against the positioning groove 31, and the other end is pressed against the support seat 12. A sliding gap is provided between the abutment panel 10 and the support seat 12, so that the elastic member 11 can be stable in the positioning groove 31 during the telescopic operation to avoid twisting and deformation.

[0028] As attached Figure 2 As shown, the sliding groove 26 and the sliding portion 27 are arranged in a gradually shrinking state toward the valve stem 2 side, and adopt an inclined structural design to improve the smoothness and stability during sliding and avoid interference between structures.

[0029] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words determined for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention, and cannot be understood as a limitation on the present invention.

Claims

1. A valve disc buffer device for a reversing valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve stem (2) and a valve disc (3), and the valve body (1) is provided with a valve seat (4) which forms a sealing fit with the valve disc (3). The valve body (1) is provided with two inlet flow channels (5) and a single outlet flow channel (8). The valve disc (3) is provided with a buffer assembly (9) which slides toward the side of the valve seat (4). The buffer assembly (9) includes an abutment panel (10), an elastic member (11), a support seat (12) and a locking member (13). The valve disc (3) is sleeved on the side of the support seat (12) facing the outlet flow channel (8). The abutment panel (10) is slidably fitted on the valve disc (3), the elastic member (11) is clamped between the abutment panel (10) and the support seat (12), and the locking member (13) passes through the abutment panel (10) and the elastic member (11) in sequence and is screwed onto the valve stem (2).

2. The valve disc buffer device of a reversing valve according to claim 1, characterized in that: The support seat (12) is provided with a pressure boss (14) on the side facing the outlet flow channel (8), and the pressure boss (14) is provided with a pressing surface (15), an inclined surface (16) and a positioning surface (17). The valve flap (3) is provided with a sealing portion (18), an extension portion (19) and a mounting portion (20). The sealing portion (18) is attached to the pressing surface (15), one end of the extension portion (19) is connected to the sealing portion (18) and is bent and extended toward the side of the valve stem (2), and one end of the mounting portion (20) is connected to the extension portion (19) and is clamped on the positioning surface (17).

3. The valve disc buffer device of a reversing valve according to claim 2, characterized in that: The sealing portion (18) is provided with a first sealing flange (21) protruding toward the pressing surface (15), and the pressing surface (15) is provided with a first sealing groove (23) adapted to the first sealing flange (21). The mounting portion (20) is provided with a second sealing flange (24) protruding toward the positioning surface (17), and the positioning surface (17) is provided with a second sealing groove (25) adapted to the second sealing flange (24).

4. The valve disc buffer device of a reversing valve according to claim 2, characterized in that: The inner circumferential surface of the extension portion (19) facing the abutting panel (10) is provided with a ring-shaped array of sliding grooves (26); the abutting panel (10) is provided with a protruding sliding portion (27) adapted to the sliding groove (26); the sliding portion (27) is slidingly fitted in the sliding groove (26).

5. The valve disc buffer device of a reversing valve according to claim 4, characterized in that: A first mounting hole (28) is provided on the abutting panel (10), a second mounting hole (29) is provided on the supporting seat (12), and a third mounting hole (30) is provided on the valve stem (2); the locking member (13) passes through the first mounting hole (28) and the second mounting hole (29) in sequence and is screwed into the third mounting hole (30).

6. The valve disc buffer device of a reversing valve according to claim 1, characterized in that: The abutting panel (10) is provided with a positioning groove (31) on one side facing the support seat (12); the elastic member (11) is sleeved on the locking member (13) with one end pressed against the positioning groove (31) and the other end pressed against the support seat (12); a sliding gap is provided between the abutting panel (10) and the support seat (12).

7. The valve disc buffer device of a reversing valve according to claim 4, characterized in that: The sliding groove (26) and the sliding portion (27) are arranged in a gradually shrinking state toward one side of the valve stem (2).

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