Corrugated pipe gate valve

Abstract

The utility model relates to the technical field of valves, in particular to a corrugated pipe gate valve. The corrugated pipe gate valve comprises a valve body, and a medium channel and a gate plate suitable for sealing the medium channel are arranged in the valve body; the valve cover is connected with the valve body, a valve cavity is formed in the valve cover, the valve cavity is perpendicular to and communicated with the medium channel, and a driving assembly is arranged at the end, away from the valve body, of the valve cover; the valve rod comprises a first rod body and a second rod body, the first rod body is arranged in the valve cavity in an axial moving mode, one end of the first rod body is connected with the gate plate, the second rod body and the first rod body are coaxially arranged, the second rod body is arranged at the end, away from the gate plate, of the first rod body, and the end, away from the first rod body, of the second rod body is detachably connected with the driving assembly. The second rod body and the first rod body are connected through the valve rod connecting piece, and the driving assembly is suitable for driving the second rod body and the first rod body to do axial reciprocating motion so that the flashboard can open or close the medium channel.

Description

Technical Field

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

[0002] In the prior art, a bellows gate valve has a valve stem, and the two ends of the valve stem are respectively threadedly connected to the handle and fixedly connected to the gate plate. By turning the handle, the valve stem is driven to rise and fall so that the gate plate opens or closes the medium channel in the bellows gate valve. However, the valve stem often has threads that are stuck or slip, causing the medium channel to be unable to be opened or closed. The bellows gate valve can only be dismantled and the valve stem replaced before installation, resulting in low work efficiency. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is that the valve stem often has threads stuck or slipped, causing the medium channel to be unable to be opened or closed. The bellows gate valve can only be removed and the valve stem replaced before installation, resulting in low work efficiency, thereby providing a bellows gate valve.

[0004] In order to solve the above problems, the utility model provides a bellows gate valve, comprising:

[0005] A valve body, wherein the valve body has a medium channel and a gate plate suitable for closing the medium channel;

[0006] A valve cover connected to the valve body, wherein a valve cavity is provided in the valve cover, the valve cavity is perpendicular to and communicates with the medium channel, and a drive assembly is provided at one end of the valve cover away from the valve body;

[0007] The valve stem comprises a first rod body and a second rod body, the first rod body is axially movably arranged in the valve cavity, one end of the first rod body is connected to the gate plate, the second rod body is coaxially arranged with the first rod body, the second rod body is arranged at an end of the first rod body away from the gate plate, the end of the second rod body away from the first rod body is detachably connected to the drive assembly, the second rod body and the first rod body are connected by a valve stem connector, and the drive assembly is suitable for driving the second rod body and the first rod body to axially reciprocate so that the gate plate opens or closes the medium channel.

[0008] Furthermore, the valve stem connecting member includes a pair of detachably connected directional blocks, and the pair of directional blocks are combined to form a first connecting cavity and a second connecting cavity, the first connecting cavity and the second connecting cavity are separated by a partition, and the other end of the first rod body is arranged in the first connecting cavity of the pair of directional blocks, and the other end of the second rod body is arranged in the second connecting cavity of the pair of directional blocks.

[0009] Furthermore, the first connecting cavity and the second connecting cavity are both provided with a limiting portion, and the ends of the first rod body and the second rod body are respectively provided with a matching portion that matches with the limiting portion.

[0010] Furthermore, the drive assembly is connected to the valve cover via a column, and the valve stem connector has sliding parts on both sides, and the valve stem connector is slidably connected to the column via the sliding parts on both sides, and the valve stem connector is suitable for relative movement along the guide direction of the column via the sliding parts.

[0011] Furthermore, the drive assembly includes a flange, a valve stem nut and a handwheel, the valve stem nut is rotatably arranged in the flange, the valve stem nut is provided with an internal thread, the second rod body is provided with an external thread, one end of the second rod body away from the first rod body is threadedly connected to the valve stem nut, one end of the valve stem nut extends out of the flange in a direction away from the first rod body, and the handwheel is sleeved on the extended end of the valve stem nut.

[0012] Furthermore, a bearing is provided between the valve stem nut and the inner wall of the flange. The bearing is sleeved on the valve stem nut via an inner ring, and an outer ring of the bearing abuts against the inner wall of the flange.

[0013] Furthermore, a stuffing box is provided at the port of the valve cavity near the driving assembly, a bellows is sleeved on the first rod body, one end of the bellows is fixedly connected to the stuffing box, a positioning plate is also provided on the first rod body, the positioning plate is located at the end of the bellows away from the stuffing box, the other end of the bellows is fixedly connected to the positioning plate, and the outer peripheral surface of the positioning plate is gap-matched with the inner wall of the valve cavity.

[0014] Furthermore, an exhaust hole is provided on the positioning plate.

[0015] Furthermore, a grease injection hole is provided on the outer wall of the flange, one end of the grease injection hole extends to the valve stem nut, and the other end of the grease injection hole is provided with a grease injection plug.

[0016] Furthermore, a cavity is provided at a connection between the valve cover and the valve body, and a gasket is arranged in the cavity.

[0017] The utility model has the following advantages:

[0018] The utility model discloses a bellows gate valve, which comprises a first rod body and a second rod body, wherein the first rod body is arranged in a valve cavity and connected to a gate plate, the second rod body is detachably connected to a driving component, and a valve stem connecting piece connects the first rod body and the second rod body, so that when the second rod body fails, only the second rod body can be replaced to resume work, and the bellows gate valve does not need to be disassembled, thereby improving work efficiency and reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the bellows gate valve in the embodiment of the utility model;

[0021] Figure 2 A schematic diagram of a valve stem connector in an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of a gasket in an embodiment of the utility model;

[0023] Description of reference numerals:

[0024] 1. Valve body; 2. Gate; 3. Valve cover; 4. First rod body; 5. Second rod body; 6. Valve stem connector; 7. Orienting block; 8. First connecting cavity; 9. Second connecting cavity; 10. Partition; 11. Limiting part; 12. Matching part; 13. Column; 14. Sliding part; 15. Flange; 16. Stem nut; 17. Handwheel; 18. Bearing; 19. Stuffing box; 20. Bellows; 21. Positioning plate; 22. Exhaust hole; 23. Grease injection hole; 24. Grease injection plug; 25. Gasket. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figures 1 to 3 The present embodiment discloses a bellows gate valve, comprising: a valve body 1, a valve cover 3 and a valve stem. The valve body 1 has a medium channel and a gate plate 2 suitable for closing the medium channel, the valve cover 3 is connected to the valve body 1, and the valve cover 3 has a valve cavity, which is perpendicular to and connected to the medium channel, and a drive assembly is arranged at one end of the valve cover 3 away from the valve body 1; the valve stem comprises a first rod body 4 and a second rod body 5, the first rod body 4 is axially movable in the valve cavity, one end of the first rod body 4 is connected to the gate plate 2, the second rod body 5 is coaxially arranged with the first rod body 4, the second rod body 5 is arranged at one end of the first rod body 4 away from the gate plate 2, and one end of the second rod body 5 away from the first rod body 4 is detachably connected to the drive assembly, the second rod body 5 and the first rod body 4 are connected by a valve stem connector 6, and the drive assembly is suitable for driving the second rod body 5 and the first rod body 4 to axially reciprocate, so that the gate plate 2 opens or closes the medium channel.

[0030] Specifically, the valve body 1 and the valve cover 3 are perpendicular to each other, the valve cover 3 has a valve cavity coaxial with the valve cover 3, the valve cavity is connected with the medium channel in the valve cover 3, the first rod body 4 is arranged in the valve cavity, the lower end of the first rod body 4 can extend into the medium channel and connect with the gate plate 2, the upper end of the first rod body 4 extends out of the valve cover 3, the lower end of the second rod body 5 is detachably connected with the upper end of the first rod body 4 through the valve stem connector 6, the upper end of the second rod body 5 is connected with the driving assembly, the driving assembly can drive the second rod body 5 to perform axial reciprocating motion, the second rod body 5 drives the first rod body 4 to move simultaneously through the valve stem connector 6, and the first rod body 4 controls the gate plate 2 to open or close the medium channel. By dividing the valve stem into the second rod body 5 and the first rod body 4, the two ends of the second rod body 5 are detachably connected with the driving assembly and the valve stem connector 6 respectively, so that when the second rod body 5 is damaged, only the second rod body 5 can be disassembled and replaced without disassembling the valve body 1, which effectively reduces the working time and improves the working efficiency.

[0031] Furthermore, the valve stem connector 6 includes a pair of detachably connected directional blocks 7, which are combined to form a first connecting cavity 8 and a second connecting cavity 9, which are separated by a partition 10. The other end of the first rod body 4 is arranged in the first connecting cavity 8 of the pair of directional blocks 7, and the other end of the second rod body 5 is arranged in the second connecting cavity 9 of the pair of directional blocks 7.

[0032] Specifically, Figure 2 As shown, the valve stem connector 6 is composed of a pair of directional blocks 7. In this embodiment, a threaded hole is provided on the directional block 7, and the pair of directional blocks 7 are fixedly connected by bolts passing through the threaded holes. Each directional block 7 has a 1 / 2 first connecting cavity 8 and a second connecting cavity 9. After the pair of directional blocks 7 are combined, the first connecting cavity 8 and the second connecting cavity 9 are formed in the valve stem connector 6. The first connecting cavity 8 and the second connecting cavity 9 are separated by a partition 10. The upper end of the first rod body 4 is arranged in the first connecting cavity 8, and the lower end of the second rod body 5 is arranged in the second connecting cavity 9. When the second rod body 5 needs to be disassembled, the pair of directional blocks 7 are disassembled, and then the second rod body 5 is disconnected from the drive assembly for disassembly.

[0033] Furthermore, the first connecting cavity 8 and the second connecting cavity 9 are both provided with a limiting portion 11 , and the ends of the first rod body 4 and the second rod body 5 are respectively provided with a matching portion 12 matching with the limiting portion 11 .

[0034] Specifically, Figure 2 As shown, in the present embodiment, the first connecting cavity 8 and the second connecting cavity 9 are both T-shaped cavities, the T-shaped cavity includes a vertical cavity and a transverse cavity, the inner wall connecting the vertical cavity and the transverse cavity forms a limiting portion 11, the matching portion 12 includes a round head and a groove, the groove is arranged in the vertical cavity, the round head is arranged in the transverse cavity, the diameter of the round head is larger than the diameter of the vertical cavity, so that the vertical cavity can limit the round head to prevent the matching portion 12 from falling out.

[0035] Furthermore, the drive assembly is connected to the valve cover 3 through the column 13, and the valve stem connector 6 has sliding parts 14 on both sides. The valve stem connector 6 is slidably connected to the column 13 through the sliding parts 14, and the valve stem connector 6 is suitable for relative movement along the guide direction of the column 13 through the sliding parts 14.

[0036] Specifically, Figure 1 As shown, the drive assembly is fixedly connected to the end of the valve cover 3 away from the valve body 1 through the column 13, and the two ends of the valve stem connecting member 6 respectively have concave circular grooves, and the circular grooves are slidably matched with the column 13. The valve stem connecting member 6 can move simultaneously with the first rod body 4 and the second rod body 5. The valve stem connecting member 6 can also horizontally limit the first rod body 4 and the second rod body 5 to prevent the first rod body 4 and the second rod body 5 from tilting.

[0037] Furthermore, the drive assembly includes a flange 15, a stem nut 16 and a handwheel 17. The stem nut 16 is rotatably arranged in the flange 15. The stem nut 16 is provided with an internal thread. The second rod body 5 is provided with an external thread. One end of the second rod body 5 away from the first rod body 4 is threadedly connected with the stem nut 16. One end of the stem nut 16 extends out of the flange 15 in a direction away from the first rod body 4. The handwheel 17 is sleeved on the extended end of the stem nut 16.

[0038] Specifically, Figure 1 As shown, the flange 15 is fixedly connected to the valve cover 3 through the column 13, and a through hole is provided in the flange 15, which is coaxial with the valve cavity. The valve stem nut 16 is rotatably arranged in the valve cavity, and the upper end of the valve stem nut 16 extends outside the through hole. The hand wheel 17 is sleeved on the upper end of the valve stem nut 16, and the second rod body 5 is threadedly matched with the valve stem nut 16. The upper end of the valve stem nut 16 is provided with a limiter, which can limit the axial movement of the valve stem nut 16. By turning the hand wheel 17 to rotate the valve stem nut 16, the second rod body 5 moves relative to the valve stem nut 16, and moves vertically upward or vertically downward.

[0039] Further, such as Figure 1 As shown, there is a bearing 18 between the stem nut 16 and the inner wall of the flange 15 . The bearing 18 is sleeved on the stem nut 16 through an inner ring. The outer ring of the bearing 18 abuts against the inner wall of the flange 15 . The bearing 18 reduces the torque of the stem nut 16 .

[0040] Furthermore, a stuffing box 19 is provided at the port of the valve chamber near the driving assembly, a bellows 20 is sleeved on the first rod body 4, one end of the bellows 20 is fixedly connected to the stuffing box 19, and a positioning plate 21 is also provided on the first rod body 4. The positioning plate 21 is located at one end of the bellows 20 away from the stuffing box 19, and the other end of the bellows 20 is fixedly connected to the positioning plate 21, and the outer peripheral surface of the positioning plate 21 is gap-matched with the inner wall of the valve chamber.

[0041] Specifically, Figure 1 As shown, a stuffing box 19 is welded and fixed to the upper port of the valve cavity, a bellows 20 is sleeved on the first rod body 4, the bellows 20 is arranged in the valve cavity, the upper end of the bellows 20 is fixedly connected to the stuffing box 19, a positioning plate 21 is arranged below the bellows 20, the positioning plate 21 is sleeved on the first rod body 4, the lower end of the bellows 20 is fixedly connected to the positioning plate 21, the two ends of the positioning plate 21 are matched with the inner wall gap of the valve cavity, the medium in the medium channel can enter the cavity between the positioning plate 21 and the stuffing box 19 through the gap, and due to the small gap, impurities in the medium cannot enter the cavity, thereby protecting the bellows 20 from being damaged by impurities.

[0042] Preferably, in this embodiment, the weld between the stuffing box 19 and the valve cover 3 is a butt weld, and the welding position height is higher than the valve cover 3. The conventional structure on the market is a fillet weld, which is not conducive to the strength of the weld on the one hand, and is not conducive to batch automated welding equipment on the other hand, and is easy to interfere with the welding gun in space. After the height is raised, there is space for the welding gun to extend in batch production, which is conducive to automated batch production.

[0043] Further, such as Figure 1 As shown, an exhaust hole 22 is provided on the positioning plate 21. The exhaust hole 22 can exhaust the air in the chamber, and the medium can enter the chamber through the exhaust hole 22, but the medium jet at the exhaust hole 22 is vertically upward, and will not directly erode the bellows 20, which can effectively protect the bellows 20.

[0044] Further, such as Figure 1 As shown, the outer wall of the flange 15 is provided with a grease injection hole 23, one end of the grease injection hole 23 extends to the valve stem nut 16, and the other end of the grease injection hole 23 is provided with a grease injection plug 24. The grease injection plug 24 is removed, and grease can be injected into the valve stem nut 16 through the grease injection hole 23, and the grease can effectively prevent the thread from getting stuck.

[0045] Further, such as Figure 3 As shown, the connection between the valve cover 3 and the valve body 1 has a cavity, and a gasket 25 is arranged in the cavity. Preferably, in this embodiment, the gasket 25 is a graphite gasket 25 without inner and outer rings.

[0046] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A bellows gate valve, characterized in that: include: A valve body (1), wherein the valve body (1) has a medium channel and a gate plate (2) suitable for closing the medium channel; A valve cover (3) is connected to the valve body (1), the valve cover (3) has a valve cavity therein, the valve cavity is perpendicular to and communicates with the medium channel, and a drive assembly is provided at one end of the valve cover (3) away from the valve body (1); A valve stem comprises a first rod body (4) and a second rod body (5), wherein the first rod body (4) is axially movable and arranged in the valve cavity, one end of the first rod body (4) is connected to the gate plate (2), the second rod body (5) is coaxially arranged with the first rod body (4), the second rod body (5) is arranged at an end of the first rod body (4) away from the gate plate (2), the end of the second rod body (5) away from the first rod body (4) is detachably connected to the drive assembly, the second rod body (5) and the first rod body (4) are connected via a valve stem connector (6), and the drive assembly is suitable for driving the second rod body (5) and the first rod body (4) to axially reciprocate so that the gate plate (2) opens or closes the medium channel.

2. The bellows gate valve according to claim 1, characterized in that: The valve stem connecting member (6) comprises a pair of detachably connected directional blocks (7), wherein the pair of directional blocks (7) are combined to form a first connecting chamber (8) and a second connecting chamber (9), wherein the first connecting chamber (8) and the second connecting chamber (9) are separated by a partition (10), and the other end of the first rod body (4) is arranged in the first connecting chamber (8) of the pair of directional blocks (7), and the other end of the second rod body (5) is arranged in the second connecting chamber (9) of the pair of directional blocks (7).

3. The bellows gate valve according to claim 2, characterized in that: The first connecting cavity (8) and the second connecting cavity (9) are both provided with a limiting portion (11), and the ends of the first rod body (4) and the second rod body (5) are respectively provided with a matching portion (12) matching with the limiting portion (11).

4. The bellows gate valve according to claim 3, characterized in that: The driving assembly is connected to the valve cover (3) via a column (13), and sliding parts (14) are provided on both sides of the valve stem connecting member (6). Both sides of the valve stem connecting member (6) are slidably connected to the column (13) via the sliding parts (14), and the valve stem connecting member (6) is suitable for relative movement along the guide direction of the column (13) via the sliding parts (14).

5. The bellows gate valve according to claim 1, characterized in that: The driving assembly comprises a flange (15), a valve stem nut (16) and a handwheel (17); the valve stem nut (16) is rotatably arranged in the flange (15); the valve stem nut (16) is provided with an internal thread; the second rod body (5) is provided with an external thread; one end of the second rod body (5) away from the first rod body (4) is threadedly connected to the valve stem nut (16); one end of the valve stem nut (16) extends out of the flange (15) in a direction away from the first rod body (4); and the handwheel (17) is sleeved on the extended end of the valve stem nut (16).

6. The bellows gate valve according to claim 5, characterized in that: A bearing (18) is provided between the valve stem nut (16) and the inner wall of the flange (15). The bearing (18) is sleeved on the valve stem nut (16) via an inner ring, and the outer ring of the bearing (18) abuts against the inner wall of the flange (15).

7. The bellows gate valve according to any one of claims 1 to 6, characterized in that: A stuffing box (19) is provided at the port of the valve cavity close to the driving component, a bellows (20) is sleeved on the first rod body (4), one end of the bellows (20) is fixedly connected to the stuffing box (19), and a positioning plate (21) is also provided on the first rod body (4), the positioning plate (21) is located at the end of the bellows (20) away from the stuffing box (19), the other end of the bellows (20) is fixedly connected to the positioning plate (21), and the outer peripheral surface of the positioning plate (21) is gap-matched with the inner wall of the valve cavity.

8. The bellows gate valve according to claim 7, characterized in that: The positioning plate (21) is provided with an exhaust hole (22).

9. The bellows gate valve according to claim 5, characterized in that: The outer wall of the flange (15) is provided with a grease injection hole (23), one end of the grease injection hole (23) extends to the valve stem nut (16), and the other end of the grease injection hole (23) is provided with a grease injection plug (24).

10. The bellows gate valve according to claim 8 or 9, characterized in that: A cavity is provided at the connection between the valve cover (3) and the valve body (1), and a gasket (25) is arranged in the cavity.

Images