Gate valve capable of reducing abrasion of valve plate

Abstract

The utility model discloses a gate valve capable of reducing abrasion of a valve plate, which comprises a valve body, a transmission hand wheel is arranged on the valve body, a valve seat is arranged in the valve body, a valve rod is hinged on the hand wheel, the valve rod is provided with the valve plate which is in sealing fit with the valve seat, the valve plate comprises a left sealing plate and a right sealing plate, and the left sealing plate and the right sealing plate are hinged on the transmission hand wheel. An abutting assembly is hinged to the valve rod and comprises an abutting panel, the side, facing the abutting panel, of the left sealing plate is provided with a first pressure bearing part in an extending mode, the right sealing part is correspondingly provided with a second pressure bearing part, and the middle of the abutting panel is pressed on the first pressure bearing part and the second pressure bearing part. A reset baffle plate for controlling the first pressure-bearing part and the second pressure-bearing part to drive the left sealing plate and the right sealing plate to reset is arranged on one side of the abutting panel, the gate valve can reduce abrasion of the valve plate, the sealing performance of the valve plate can be enhanced, and friction generated when the valve plate and the valve seat are sealed is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a gate valve capable of reducing the wear of a valve plate. Background Art

[0002] At present, gate valves all have friction sealing structures. When the valve is about to close, the valve plate uses the longitudinal force applied downward by the valve stem to squeeze the valve plate sealing surface against the valve body valve seat sealing surface to achieve sealing. Conversely, to open the valve, the upward lifting force of the valve stem is used to forcibly move the valve plate upward and then separate from the valve body sealing surface, and the valve opens. When the valve is about to close or just about to open, the sealing part will scratch the valve seat sealing surface, causing the valve sealing surface to be scratched and affecting the sealing performance. At the same time, the valve stem is subjected to greater pressure, and the valve stem is easily twisted and deformed, which makes replacement and maintenance inconvenient, seriously affecting the normal production progress of the enterprise, and even leading to the occurrence of safety accidents. Utility Model Content

[0003] The utility model aims to provide a gate valve which can reduce the wear of the valve plate, enhance the sealing performance of the valve plate, and reduce the friction between the valve plate and the valve seat when sealing.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gate valve capable of reducing the wear of a valve plate, comprising a valve body, a transmission handwheel being installed on the valve body, a valve seat being arranged in the valve body, a valve stem being hingedly arranged on the handwheel, a valve plate being arranged on the valve stem and forming a sealing fit with the valve seat, the valve plate comprising a left sealing plate and a right sealing plate, an abutment assembly being hingedly arranged on the valve stem, the abutment assembly comprising an abutment panel, a first pressure-bearing portion being extended toward one side of the abutment panel on the left sealing plate, a second pressure-bearing portion being correspondingly arranged on the right sealing portion, a middle portion of the abutment panel being respectively pressed against the first pressure-bearing portion and the second pressure-bearing portion, and a reset baffle being arranged on one side of the abutment panel for controlling the first pressure-bearing portion and the second pressure-bearing portion to drive the left sealing plate and the right sealing plate to perform a reset operation.

[0005] Preferably, a mounting column is provided on the abutting panel on the side facing the valve stem, a threaded interface is provided on the mounting column, and a screw hole matching the threaded interface is provided on the valve stem.

[0006] Preferably, a left pressure plate and a right pressure plate are arranged between the mounting column and the reset baffle, one end of the left pressure plate is connected to the mounting column and the other end extends toward the first pressure-bearing part and is tightly set, and one end of the right pressure plate is connected to the mounting column and the other end extends toward the second pressure-bearing part and is tightly set.

[0007] Preferably, a first inclined surface is provided on the left pressure plate, a corresponding second inclined surface is provided on the first pressure-bearing portion, a third inclined surface is provided on the right pressure plate, and a corresponding fourth inclined surface is provided on the second pressure-bearing portion.

[0008] Preferably, the reset baffle is provided with a first limiting portion and a symmetrically arranged second limiting portion, the first pressure-bearing portion is provided with a first sliding portion extending toward one side of the first limiting portion, and the second pressure-bearing portion is provided with a second sliding portion extending toward one side of the second limiting portion.

[0009] Preferably, the first sliding portion is provided with a first inclined surface on the side facing the first limiting portion, the first limiting portion is provided with a corresponding second inclined surface, the second sliding portion is provided with a third inclined surface on the side facing the second limiting portion, and the second limiting portion is provided with a corresponding fourth inclined surface.

[0010] Preferably, shaft holes are provided on both sides of the reset baffle plate, a plurality of fixing seats are respectively provided on both sides of the left sealing plate and the right sealing plate, positioning holes corresponding to the shaft holes are provided on the fixing seats, and shaft rods are provided on the fixing seats, and the shaft rods rotate in the shaft holes.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: when the valve stem applies a downward force, the left pressure plate and the right pressure plate are respectively squeezed the first pressure-bearing part and the second pressure-bearing part, so as to control the left sealing plate and the right sealing plate to achieve sealing cooperation with the valve seat; when the valve stem is lifted, the first limiting part and the second limiting part are squeezed the first sliding part and the second sliding part, so as to cause the left sealing plate and the right sealing plate to slide toward one side of the valve stem at the same time, thereby enhancing the sealing performance of the valve plate and reducing the friction when the valve plate and the valve seat are sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is an enlarged view of part A of the present utility model.

[0014] In the figure: 1. valve body; 2. transmission hand wheel; 3. valve seat; 4. valve stem; 5. valve plate; 8. left sealing plate; 9. right sealing plate; 10. abutment assembly; 11. abutment panel; 12. first pressure-bearing part; 13. second pressure-bearing part; 14. reset baffle plate; 15. mounting column; 16. threaded interface; 17. screw hole; 18. left pressure plate; 19. right pressure plate; 20. first inclined surface; 21. second inclined surface; 23. third inclined surface; 24. fourth inclined surface; 25. first limiting part; 26. second limiting part; 27. first sliding part; 28. second sliding part; 29. ​​first inclined surface; 30. second inclined surface; 31. third inclined surface; 32. fourth inclined surface; 33. shaft hole; 34. fixing seat; 35. positioning hole; 36. shaft rod. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] Example: As attached Figures 1-2 A gate valve capable of reducing valve plate wear is shown, comprising a valve body 1, a transmission hand wheel 2 is mounted on the valve body 1, a valve seat 3 is arranged in the valve body 1, a valve stem 4 is hingedly arranged on the hand wheel, a valve plate 5 which forms a sealing match with the valve seat 3 is arranged on the valve stem 4, the valve plate 5 comprises a left sealing plate 8 and a right sealing plate 9 (a gap is arranged between the valve stem 4), an abutment assembly 10 is hingedly arranged on the valve stem 4, the abutment assembly 10 comprises an abutment panel 11, a first pressure-bearing portion 12 (an integrated structure) is extended from the left sealing plate 8 toward one side of the abutment panel 11, a second pressure-bearing portion 13 (an integrated structure) is correspondingly arranged on the right sealing portion, and the middle portion of the abutment panel 11 is pressed tightly against the first pressure-bearing portion 12 and the right pressure-bearing portion 13 are pressed against the first pressure-bearing portion 12 and the right pressure-bearing portion 13 are pressed against the second pressure-bearing portion 13 ... On the first pressure-bearing part 12 and the second pressure-bearing part 13, a reset baffle 14 is arranged on one side of the abutting panel 11 for controlling the first pressure-bearing part 12 and the second pressure-bearing part 13 to drive the left sealing plate 8 and the right sealing plate 9 to perform a reset operation. When the valve stem 4 applies a downward force, the left pressure plate 18 and the right pressure plate 19 are respectively squeezed by the first pressure-bearing part 12 and the second pressure-bearing part 13 to control the left sealing plate 8 and the right sealing plate 9 to achieve a sealing fit with the valve seat 3. When the valve stem 4 performs an ascending operation, the first limiting part 25 and the second limiting part 26 are squeezed by the first sliding part 27 and the second sliding part 28 to cause the left sealing plate 8 and the right sealing plate 9 to slide toward the side of the valve stem 4 at the same time, which can enhance the sealing performance of the valve plate 5 and reduce the friction when the valve plate 5 and the valve seat 3 are sealed.

[0017] As attached Figure 2As shown, a mounting column 15 (an integrated structure) is provided on the abutment panel 11 on the side facing the valve stem 4, a threaded interface 16 is provided on the mounting column 15, and a screw hole 17 matched with the threaded interface 16 is opened on the valve stem 4 to facilitate the later disassembly and maintenance of the abutment panel 11.

[0018] As attached Figure 2 As shown, a left pressure plate 18 and a right pressure plate 19 (an integrated structure) are arranged between the mounting column 15 and the reset baffle 14, one end of the left pressure plate 18 is connected to the mounting column 15 and the other end extends toward the first pressure-bearing portion 12 and is tightly arranged, and one end of the right pressure plate 19 is connected to the mounting column 15 and the other end extends toward the second pressure-bearing portion 13 and is tightly arranged. The arranged left pressure plate 18 and right pressure plate 19 can transmit the downward sealing pressure of the valve stem 4, and the lateral extrusion sealing method can reduce the friction with the valve seat 3.

[0019] As attached Figure 2 As shown, the left pressure plate 18 is provided with a first inclined surface 20, the first pressure-bearing portion 12 is provided with a corresponding second inclined surface 21, the right pressure plate 19 is provided with a third inclined surface 23, and the second pressure-bearing portion 13 is provided with a corresponding fourth inclined surface 24. The structures designed with inclined surfaces cooperate with each other and can have a stable pressure transmission effect.

[0020] As attached Figure 2 As shown, the reset baffle 14 is provided with a first limiting portion 25 and a symmetrically arranged second limiting portion 26 (an integrated structure), the first pressure-bearing portion 12 is provided with a first sliding portion 27 (arranged in a conical shape) extending toward the first limiting portion 25, and the second pressure-bearing portion 13 is provided with a second sliding portion 28 (arranged in a conical shape) extending toward the second limiting portion 26. The first limiting portion 25 and the second limiting portion 26 are used to squeeze the first sliding portion 27 and the second sliding portion 28, so that when the valve stem 4 is rising, the left sealing plate 8 and the right sealing plate 9 can achieve the effect of inward lateral displacement, thereby reducing the friction with the valve seat 3.

[0021] As attached Figure 2 As shown, the first sliding portion 27 is provided with a first inclined surface 29 on the side facing the first limiting portion 25, the first limiting portion 25 is provided with a corresponding second inclined surface 30, the second sliding portion 28 is provided with a third inclined surface 31 on the side facing the second limiting portion 26, and the second limiting portion 26 is provided with a corresponding fourth inclined surface 32. The inclined surface design can reduce interference between structures and has the function of stabilizing the lateral displacement of the left sealing plate 8 and the right sealing plate 9.

[0022] As attached Figure 2As shown, shaft holes 33 are provided on both sides of the reset baffle 14, and a plurality of fixing seats 34 (two fixing seats 34 are provided on each side of the left sealing plate 8 and the right sealing plate 9) are respectively provided. Positioning holes 35 corresponding to the shaft holes 33 are provided on the fixing seats 34, and shaft rods 36 are provided on the fixing seats 34. The shaft rods 36 rotate in the shaft holes 33 to play a role of active connection, thereby preventing the left sealing plate 8 and the right sealing plate 9 from getting stuck during operation.

[0023] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only 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 limitations on the present invention.

Claims

1. A gate valve capable of reducing valve plate wear, comprising a valve body (1), a transmission hand wheel (2) being mounted on the valve body (1), a valve seat (3) being arranged in the valve body (1), a valve stem (4) being hingedly arranged on the hand wheel, a valve plate (5) being arranged on the valve stem (4) and forming a sealing fit with the valve seat (3), characterized in that; The valve plate (5) includes a left sealing plate (8) and a right sealing plate (9); an abutment assembly (10) is hingedly provided on the valve stem (4); the abutment assembly (10) includes an abutment panel (11); the left sealing plate (8) is provided with a first pressure-bearing portion (12) extending toward one side of the abutment panel (11); the right sealing plate (9) is provided with a second pressure-bearing portion (13) correspondingly; the abutment panel (11) is respectively pressed against the first pressure-bearing portion (12) and the second pressure-bearing portion (13); one side of the abutment panel (11) is provided with a reset baffle (14) for controlling the first pressure-bearing portion (12) and the second pressure-bearing portion (13) to drive the left sealing plate (8) and the right sealing plate (9) to perform a reset operation.

2. A gate valve capable of reducing valve plate wear according to claim 1, characterized in that: A mounting column (15) is arranged on the abutting panel (11) on the side facing the valve stem (4), a threaded interface (16) is arranged on the mounting column (15), and a screw hole (17) matched with the threaded interface (16) is opened on the valve stem (4).

3. A gate valve capable of reducing valve plate wear according to claim 2, characterized in that: A left pressure plate (18) and a right pressure plate (19) are arranged between the mounting column (15) and the reset baffle plate (14); one end of the left pressure plate (18) is connected to the mounting column (15) and the other end extends toward and is tightly arranged on the first pressure-bearing part (12); one end of the right pressure plate (19) is connected to the mounting column (15) and the other end extends toward and is tightly arranged on the second pressure-bearing part (13).

4. A gate valve capable of reducing valve plate wear according to claim 3, characterized in that: The left pressure plate (18) is provided with a first inclined surface (20), the first pressure-bearing portion (12) is provided with a corresponding second inclined surface (21), the right pressure plate (19) is provided with a third inclined surface (23), and the second pressure-bearing portion (13) is provided with a corresponding fourth inclined surface (24).

5. A gate valve capable of reducing valve plate wear according to claim 4, characterized in that: The reset baffle (14) is provided with a first limiting portion (25) and a symmetrically arranged second limiting portion (26); the first pressure-bearing portion (12) is provided with a first sliding portion (27) extending toward one side of the first limiting portion (25); and the second pressure-bearing portion (13) is provided with a second sliding portion (28) extending toward one side of the second limiting portion (26).

6. A gate valve capable of reducing valve plate wear according to claim 5, characterized in that: The first sliding portion (27) is provided with a first inclined surface (29) on a side facing the first limiting portion (25), and a corresponding second inclined surface (30) is provided on the first limiting portion (25); the second sliding portion (28) is provided with a third inclined surface (31) on a side facing the second limiting portion (26), and a corresponding fourth inclined surface (32) is provided on the second limiting portion (26).

7. A gate valve capable of reducing valve plate wear according to claim 3, characterized in that: Axial holes (33) are provided on both sides of the reset baffle plate (14), a plurality of fixing seats (34) are provided on both sides of the left sealing plate (8) and the right sealing plate (9), positioning holes (35) corresponding to the axial holes (33) are provided on the fixing seats (34), and an axle rod (36) is provided on the fixing seats (34), and the axle rod (36) rotates in the axle hole (33).

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