Gate valve

Abstract

The gate valve comprises a valve body, a valve seat, a valve plate, a valve rod and a valve cover, the valve seat is installed on the inner side of the valve body, the valve cover is detachably installed at the upper end of the valve body, the valve rod is located on the inner side of the valve body, penetrates through the valve cover and extends upwards, a hand wheel capable of driving the valve rod to move up and down is installed on the valve rod, and the valve plate is installed at the lower end of the valve rod. An annular groove is formed in the middle of the outer side of the valve plate, ejector blocks are fixedly connected to the left side and the right side of the upper end of the valve plate, the inverted-T-shaped blocks are located on the inner side of the annular groove, the ejector blocks are located at the upper ends of the inverted-T-shaped blocks, the inverted-T-shaped blocks are slidably connected between the ejector blocks, and guide strips are fixedly connected to the front end and the rear end of the inner side of the valve body and located between the left valve seat and the right valve seat. The left positioning block and the right positioning block are fixedly connected to the front end and the rear end of the valve plate, the guide strip is slidably connected between the left positioning block and the right positioning block, the inverted-T-shaped block is moved forwards or backwards, the inverted-T-shaped block is far away from the ejector block, the valve rod and the valve plate can be disassembled, the structure is simple, and disassembly and assembly are convenient.

Description

Technical Field

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

[0002] The utility model patent with application number: CN201620670159.9 discloses a valve body, a valve plate, a valve stem, a valve cover, and a handwheel. The valve plate is installed at the bottom of the valve body through the valve stem, the valve cover is fixed to the top of the valve body, and the handwheel is fixed to the top of the valve cover. An indicator light is installed on the valve body, and the valve body and the handwheel are coated with reflective paint. The valve plate is connected to the valve stem through an axle pin. The above technical solution can easily find the gate valve in the dark according to the indicator light, and when the light source shines on the gate valve, the reflective layer on the valve body and the handwheel can clearly reflect the position and direction of the gate valve. However, since the valve plate is fixed to the valve stem through a pin shaft, it is very inconvenient, time-consuming and laborious to disassemble the valve plate. Utility Model Content

[0003] The utility model aims to solve the problems existing in the above-mentioned prior art and provides a gate valve, in which a valve plate and a valve stem are connected by an inverted T-shaped clamping block clamped between two top blocks, and the valve plate and the valve stem are convenient to disassemble and assemble.

[0004] The utility model adopts a technical solution to solve the technical problem: the gate valve comprises a valve body, a valve seat, a valve plate, a valve stem and a valve cover, the valve seat is installed inside the valve body, the valve cover is detachably installed on the upper end of the valve body, the valve stem is located inside the valve body and extends upward through the valve cover, a hand wheel capable of driving the valve stem to move up and down is installed on the valve stem, a valve plate is installed at the lower end of the valve stem, an inverted T-shaped block is fixedly connected to the lower end of the valve stem, an annular groove is opened in the middle of the outer side of the valve plate, top blocks are fixedly connected to the left and right sides of the upper end of the valve plate, the inverted T-shaped block is located inside the annular groove, and the top block is located at the upper end of the inverted T-shaped block The inverted T-block is slidably connected between the top blocks, and the front and rear ends of the inner side of the valve body are fixedly connected with guide strips, which are located in the middle of the left and right valve seats. The front and rear ends of the valve plate are fixedly connected with left and right positioning blocks, and the guide strip is slidably connected between the left and right positioning blocks. The inverted T-block is moved forward or backward so that the inverted T-block is away from the top block, and the valve stem and the valve plate can be disassembled. The structure is simple and the disassembly and assembly are convenient. The handwheel drives the valve stem to move up and down, and the valve stem drives the valve plate to move up and down through the inverted T-block. The guide strip guides the valve plate, so that the use effect of the valve plate is better.

[0005] In order to further improve it, a groove is opened in the middle of the left and right ends of the valve plate, and a chamfer is provided on the outside of the groove, so that when the valve plate is half open, water flows into the inside of the groove and is guided downward by the chamfer, reducing the water flow entering the valve cover, and the valve has a better use effect.

[0006] For further improvement, a connecting rod fixedly connected to the valve plate is provided on the inner side of the annular groove. The annular groove can reduce the manufacturing cost of the valve plate. The connecting rod fixes the valve plates separated by the annular groove together, making the overall structure of the valve plate more stable.

[0007] As a further improvement, the lower end of the inverted T-shaped block is provided with a platform fixedly connected to the valve plate, so that the use effect of the inverted T-shaped block is better.

[0008] To further improve, a bracket is installed on the upper end of the valve cover, an installation groove is opened on the upper end of the bracket, a stem nut is installed on the inner side of the installation groove, the valve stem is threadedly connected to the inner side of the stem nut, a convex ring is arranged on the outer side of the stem nut, bearings are installed on both ends of the convex ring, the stem nut is rotatably connected to the inner side of the installation groove through the bearing, a positioning ring is threadedly connected to the upper end of the installation groove, the positioning ring is slidably connected to the outer side of the stem nut, a hexagonal block is arranged on the outer side of the upper end of the stem nut, a handwheel is slidably connected to the outer side of the hexagonal block, a positioning nut threadedly connected to the outer side of the stem nut is arranged on the upper end of the handwheel, the handwheel drives the stem nut to rotate, and the stem nut drives the valve stem to move up and down, and the bearing makes the rotation effect of the stem nut better.

[0009] To further improve, the outer side of the mounting groove is provided with an oil filling hole opened on the bracket, the inner side of the oil filling hole is threadedly connected with an oil filling head, a through hole is opened on the oil filling head, and a mounting hole opened on the inner side of the oil filling head is provided on the outer side of the through hole. A sealing ball is installed at the right end of the mounting hole, and the sealing ball can seal the through hole. A spring installed on the inner side of the mounting hole is provided at the left end of the sealing ball. A certain gap is left between the bearing and the side wall of the mounting groove. When lubricating oil needs to be added, the oil nozzle is aligned with the through hole, the sealing ball is pushed to the left, the spring is compressed, the through hole is opened, and lubricating oil is injected into the inside of the through hole. The lubricating oil enters the inner side of the mounting groove through the oil filling hole, and enters the inner side of the bearing through the gap between the bearing and the side wall of the mounting groove to lubricate the bearing, so that the bearing has a better use effect and a longer service life.

[0010] To be further improved, the outer side of the valve stem is provided with a closed groove opened on the upper end of the valve cover, a packing is installed on the inner side of the closed groove, the upper end of the packing is provided with a pressure ring installed on the inner side of the closed groove, a pressure plate is installed on the upper end of the pressure ring, the left and right ends of the pressure plate are slidably connected with screws, the upper end of the pressure plate is provided with a locking nut threadedly connected to the outer side of the screw, the lower end of the screw is fixedly connected with a rotating block, the rotating block is rotatably connected with a rotating shaft, the outer side of the rotating shaft is slidably connected with a rotating rack, the rotating rack is fixedly connected to the upper end of the valve cover, the rear end of the rotating shaft is fixedly connected with a limiting shaft, a through hole is opened at the front end of the rotating shaft, and an open pin is installed on the inside of the through hole, so that the sealing effect between the valve stem and the valve cover is better.

[0011] As a further improvement, a gasket is installed between the positioning nut and the handwheel, so that the positioning effect of the positioning nut is better.

[0012] For further improvement, a set screw is threadedly connected to the positioning nut, and the set screw is in contact with the gasket. The set screw can prevent the positioning nut and the gasket from rotating, thereby achieving a better positioning effect of the positioning nut.

[0013] As a further improvement, reinforcement blocks are fixedly connected to the left and right ends of the inner upper end of the valve body, so that the overall structure of the valve body is more stable and has a longer service life.

[0014] To be further improved, a sealing ring is fixedly connected to the outside of the valve stem, a sealing groove is opened on the inner side of the upper end of the valve cover, and the sealing ring can be slidably connected to the inner side of the sealing groove, so that the sealing effect between the valve stem and the valve cover is better, and when the sealing ring is located on the inner side of the sealing groove to seal the valve cover and the valve stem, the packing can be replaced, and the gate valve has a good use effect and a long service life.

[0015] The beneficial effects of the utility model are as follows: the valve stem and the valve plate can be disassembled by moving the inverted T-block forward or backward so that the inverted T-block is away from the top block. The structure is simple and the disassembly and assembly are convenient. The hand wheel drives the valve stem to move up and down, and the valve stem drives the valve plate to move up and down through the inverted T-block, and the guide strip guides the valve plate, so that the use effect of the valve plate is better. When lubricating oil needs to be added, the oil nozzle is aligned with the through hole, the sealing ball is pushed to the left, the spring is compressed, the through hole is opened, and lubricating oil is injected into the inside of the through hole. The lubricating oil enters the inside of the installation groove through the oil filling hole, and enters the inside of the bearing through the gap between the bearing and the side wall of the installation groove to lubricate the bearing, so that the use effect of the bearing is better and the service life is longer. When the sealing ring is located on the inside of the sealing groove to seal the valve cover and the valve stem, the packing can be replaced. The gate valve has a good use effect and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 For this utility model Figure 2 The enlarged view of point A in the middle;

[0019] Figure 4 For this utility model Figure 2 The enlarged view of point B in the middle;

[0020] Figure 5 For this utility model Figure 2 Enlarged view of point C in the middle;

[0021] Figure 6 This is a schematic diagram of the structure of the valve body of the utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the valve plate of the utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the valve stem of the utility model;

[0024] Fig. 9 This is a schematic diagram of the structure of the valve cover of the utility model;

[0025] Fig.10 It is a structural schematic diagram of the valve stem nut of the utility model.

[0026] Description of reference numerals: 1, valve body; 11, valve seat; 12, guide strip; 13, reinforcement block; 2, valve plate; 21, ring groove; 22, top block; 23, platform; 24, positioning block; 25, connecting rod; 26, groove; 261, chamfer; 3, valve stem; 31, inverted T-shaped block; 32, sealing ring; 4, valve cover; 41, sealing groove; 42, closing groove; 43, rotating frame; 44, rotating shaft; 441, limiting shaft; 442, through hole; 443, cotter pin; 45. Packing; 46. Pressing ring; 47. Pressing plate; 48. Screw; 481. Locking nut; 482. Rotating block; 5. Bracket; 51. Mounting groove; 52. Stem nut; 521. Convex ring; 522. Hexagonal block; 53. Handwheel; 54. Oil filling hole; 55. Bearing; 56. Locating ring; 57. Locating nut; 571. Set screw; 58. Gasket; 6. Oil filling head; 61. Through hole; 62. Mounting hole; 63. Sealing ball; 64. Spring. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-10 The utility model is further described as follows:

[0028] like Figure 1-Figure 2 and Figure 6-Figure 8 As shown: In this embodiment, a gate valve comprises a valve body 1, a valve seat 11, a valve plate 2, a valve stem 3 and a valve cover 4. The valve seat 11 is mounted on the inner side of the valve body 1, and the valve cover 4 is detachably mounted on the upper end of the valve body 1. The valve stem 3 is located on the inner side of the valve body 1 and extends upward through the valve cover 4. A valve plate 2 is mounted on the lower end of the valve stem 3, and an inverted T-shaped block 31 is fixedly connected to the lower end of the valve stem 3. An annular groove 21 is opened in the middle of the outer side of the valve plate 2. Top blocks 22 are fixedly connected to the left and right sides of the upper end of the valve plate 2. The inverted T-shaped block 31 is located on the inner side of the annular groove 21, and the top block 22 is located on the upper end of the inverted T-shaped block 31. The block 31 is slidably connected between the top blocks 22, and the lower end of the inverted T-block 31 is provided with a platform 23 fixedly connected to the valve plate 2. The front and rear ends of the inner side of the valve body 1 are fixedly connected with guide strips 12, and the guide strip 12 is located between the left and right valve seats 11. The front and rear ends of the valve plate 2 are fixedly connected with left and right positioning blocks 24, and the guide strip 12 is slidably connected between the left and right positioning blocks 24. A groove 26 is opened in the middle of the left and right ends of the valve plate 2, and a chamfer 261 is provided on the outside of the groove 26. A connecting rod 25 fixedly connected to the valve plate 2 is provided on the inside of the annular groove 21.

[0029] like Figure 1-Figure 2 and Figure 5 and Fig.10 As shown: a bracket 5 is installed on the upper end of the valve cover 4, a mounting groove 51 is opened on the upper end of the bracket 5, a stem nut 52 is installed on the inner side of the mounting groove 51, the valve stem 3 is threadedly connected to the inner side of the valve stem nut 52, a convex ring 521 is arranged on the outer side of the valve stem nut 52, bearings 55 are installed on the upper and lower ends of the convex ring 521, the valve stem nut 52 is rotatably connected to the inner side of the mounting groove 51 through the bearing 55, a positioning ring 56 is threadedly connected to the upper end of the mounting groove 51, the positioning ring 56 is slidably connected to the outer side of the valve stem nut 52, a hexagonal block 522 is arranged on the upper end of the valve stem nut 52, a handwheel 53 is slidably connected to the outer side of the hexagonal block 522, a positioning nut 57 threadedly connected to the outer side of the valve stem nut 52 is arranged on the upper end of the handwheel 53, a gasket 58 is installed between the positioning nut 57 and the handwheel 53, a set screw 571 is threadedly connected to the positioning nut 57, and the set screw 571 contacts the gasket 58.

[0030] like Figure 2 and Figure 4 As shown: an oil filling hole 54 opened on the bracket 5 is provided on the outer side of the mounting groove 51, an oil filling head 6 is threadedly connected to the inner side of the oil filling hole 54, a through hole 61 is opened on the oil filling head 6, a mounting hole 62 opened on the inner side of the oil filling head 6 is provided on the outer side of the through hole 61, a sealing ball 63 is installed on the right end of the mounting hole 62, the sealing ball 63 can seal the through hole 61, a spring 64 installed on the inner side of the mounting hole 62 is provided on the left end of the sealing ball 63, and a certain gap is left between the bearing 55 and the side wall of the mounting groove 51.

[0031] like Figure 1-Figure 3 and Fig. 9 As shown: a closed groove 42 opened on the upper end of the valve cover 4 is provided on the outer side of the valve stem 3, a packing 45 is installed on the inner side of the closed groove 42, a pressure ring 46 installed on the inner side of the closed groove 42 is provided on the upper end of the packing 45, a pressure plate 47 is installed on the upper end of the pressure ring 46, screws 48 are slidably connected to the left and right ends of the pressure plate 47, a locking nut 481 threadedly connected to the outer side of the screw 48 is provided on the upper end of the pressure plate 47, a rotating block 482 is fixedly connected to the lower end of the screw 48, a rotating shaft 44 is rotatably connected to the rotating block 482, a rotating frame 43 is slidably connected to the outer side of the rotating shaft 44, the rotating frame 43 is fixedly connected to the upper end of the valve cover 4, a limited position shaft 441 is fixedly connected to the rear end of the rotating shaft 44, a through hole 442 is opened at the front end of the rotating shaft 44, a cotter pin 443 is installed on the inner side of the through hole 442, a sealing ring 32 is fixedly connected to the outer side of the valve stem 3, a sealing groove 41 is opened on the inner side of the upper end of the valve cover 4, and the sealing ring 32 can be slidably connected to the inner side of the sealing groove 41.

[0032] When the utility model is in use: the hand wheel 53 drives the valve stem nut 52 to rotate, and the valve stem nut 52 drives the valve stem 3 to move up and down, and the guide strip 12 guides the valve plate 2, so that the use effect of the valve plate 2 is better. When the valve stem 3 or the valve plate 2 needs to be disassembled, the inverted T-shaped block 31 is moved forward or backward, so that the inverted T-shaped block 31 is away from the top block 22, and the valve stem 3 and the valve plate 2 can be disassembled. The structure is simple and the disassembly and assembly are convenient. When lubricating oil needs to be added, the oil nozzle is aimed at the through hole 61, and the sealing ball 63 is pushed to the left. The spring 64 is compressed, the through hole 61 is opened, and the lubricating oil is injected into the inner side of the through hole 61. The lubricating oil enters the inner side of the installation groove 51 through the oil filling hole 54, and enters the inner side of the bearing 55 through the gap between the bearing 55 and the side wall of the installation groove 51, so as to lubricate the bearing 55, so that the use effect of the bearing 55 is better and the service life is longer. When the sealing ring 32 is located at the inner side of the sealing groove 41 to seal the valve cover 4 and the valve stem 3, the packing 45 can be replaced, and the gate valve has a good use effect and a long service life.

[0033] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A gate valve, comprising a valve body (1), a valve seat (11), a valve plate (2), a valve stem (3) and a valve cover (4), wherein the valve seat (11) is mounted on the inner side of the valve body (1), the valve cover (4) is detachably mounted on the upper end of the valve body (1), the valve stem (3) is located on the inner side of the valve body (1) and extends upward through the valve cover (4), and the valve plate (2) is mounted on the lower end of the valve stem (3), wherein: The lower end of the valve stem (3) is fixedly connected to an inverted T-shaped block (31), an annular groove (21) is opened in the middle of the outer side of the valve plate (2), and top blocks (22) are fixedly connected to the left and right sides of the upper end of the valve plate (2), the inverted T-shaped block (31) is located inside the annular groove (21), the top block (22) is located at the upper end of the inverted T-shaped block (31), the inverted T-shaped block (31) is slidably connected between the left and right top blocks (22), the front and rear ends of the inner side of the valve body (1) are fixedly connected to guide strips (12), the guide strips (12) are located in the middle of the left and right valve seats (11), the front and rear ends of the valve plate (2) are fixedly connected to the left and right positioning blocks (24), and the guide strips (12) are slidably connected between the left and right positioning blocks (24).

2. A gate valve according to claim 1, characterized in that: The valve plate (2) is provided with grooves (26) in the middle of both left and right ends, and the outer side of the grooves (26) is provided with chamfers (261).

3. A gate valve according to claim 1, characterized in that: A connecting rod (25) fixedly connected to the valve plate (2) is provided on the inner side of the annular groove (21).

4. A gate valve according to claim 1, characterized in that: The lower end of the inverted T-shaped block (31) is provided with a platform (23) fixedly connected to the valve plate (2).

5. A gate valve according to claim 1, characterized in that: A bracket (5) is installed at the upper end of the valve cover (4), a mounting groove (51) is opened at the upper end of the bracket (5), a valve stem nut (52) is installed inside the mounting groove (51), the valve stem (3) is threadedly connected to the inner side of the valve stem nut (52), a convex ring (521) is arranged outside the valve stem nut (52), bearings (55) are installed at both upper and lower ends of the convex ring (521), the valve stem nut (52) is rotatably connected to the inner side of the mounting groove (51) through the bearing (55), a positioning ring (56) is threadedly connected to the upper end of the mounting groove (51), the positioning ring (56) is slidably connected to the outer side of the valve stem nut (52), a hexagonal block (522) is arranged at the upper end of the valve stem nut (52), a hand wheel (53) is slidably connected to the outer side of the hexagonal block (522), and a positioning nut (57) threadedly connected to the outer side of the valve stem nut (52) is arranged at the upper end of the hand wheel (53).

6. A gate valve according to claim 5, characterized in that: The outer side of the mounting groove (51) is provided with an oil filling hole (54) opened on the bracket (5), the inner side of the oil filling hole (54) is threadedly connected with an oil filling head (6), the oil filling head (6) is provided with a through hole (61), the outer side of the through hole (61) is provided with a mounting hole (62) opened on the inner side of the oil filling head (6), a sealing ball (63) is installed at the right end of the mounting hole (62), the sealing ball (63) can seal the through hole (61), a spring (64) installed on the inner side of the mounting hole (62) is provided at the left end of the sealing ball (63), and a certain gap is left between the bearing (55) and the side wall of the mounting groove (51).

7. A gate valve according to claim 1, characterized in that: The valve stem (3) is provided with a closed groove (42) opened at the upper end of the valve cover (4), a packing (45) is installed inside the closed groove (42), a pressure ring (46) installed inside the closed groove (42) is provided at the upper end of the packing (45), a pressure plate (47) is installed at the upper end of the pressure ring (46), the left and right ends of the pressure plate (47) are slidably connected with screws (48), and the upper end of the pressure plate (47) is provided with a locking nut threadedly connected to the outer side of the screw (48) (481), the lower end of the screw rod (48) is fixedly connected to a rotating block (482), the rotating block (482) is rotatably connected to a rotating shaft (44), the outer side of the rotating shaft (44) is slidably connected to a rotating frame (43), the rotating frame (43) is fixedly connected to the upper end of the valve cover (4), the rear end of the rotating shaft (44) is fixedly connected to a limiting shaft (441), the front end of the rotating shaft (44) is provided with a through hole (442), and a cotter pin (443) is installed inside the through hole (442).

8. A gate valve according to claim 5, characterized in that: A gasket (58) is installed between the positioning nut (57) and the hand wheel (53).

9. A gate valve according to claim 8, characterized in that: The positioning nut (57) is threadedly connected with a set screw (571), and the set screw (571) is in contact with the gasket (58).

10. A gate valve according to claim 1 or 7, characterized in that: A sealing ring (32) is fixedly connected to the outer side of the valve stem (3), a sealing groove (41) is formed on the inner side of the upper end of the valve cover (4), and the sealing ring (32) is slidably connected to the inner side of the sealing groove (41).

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