High pressure bellows gate valve

Abstract

A high-pressure corrugated pipe gate valve, including valve body and fixedly connected on both sides of the valve body upstream valve port and downstream valve port, the inner wall of the valve body is fixedly connected with two valve seats, the outer wall of the two valve seats is symmetrically provided with an opening for discharging, the opposite side of the two valve seats is slidably installed with a valve plate, the top of the valve plate is fixedly installed with a valve rod, the top of the valve body is fixedly connected with an installed corrugated pipe, the bottom end of the corrugated pipe is fixedly connected on the outer side wall of the valve rod, the top end of the valve rod is connected with a driving rod, the two sides of the driving rod are engagedly connected with a handle for driving the up and down movement, the utility model discloses a lever principle and gear engagement are used for effectively dispersing the driving resistance under high pressure, compared with the conventional hand wheel screw transmission, even under high pressure working condition, the operation can be easily completed, and the problem of driving labor and operator fatigue under high pressure environment is solved.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure gate valve technology, specifically to a high-pressure bellows gate valve. Background Technology

[0002] In industrial fields such as petrochemicals, natural gas transmission, and high-pressure boiler systems, high-pressure bellows gate valves, as core components for controlling the flow of media, must withstand high-pressure conditions for extended periods while meeting stringent requirements for ease of operation, sealing reliability, and service life.

[0003] According to Chinese Patent No. CN221636057U, a high-pressure bellows gate valve is disclosed, including a valve body, a valve cover, a mounting bracket, and a valve stem. A gate plate is provided at one end of the valve stem inside the valve body. A handwheel threadedly connected to the valve stem is rotatably mounted on the mounting bracket. A fixing rod is fixedly mounted on the mounting bracket. Two locking sleeves are slidably fitted on the fixing rod. A binding rope passing through the handwheel connects the two locking sleeves. One locking sleeve has a locking pin threadedly connected to the fixing rod. A rotating head is rotatably mounted on the locking pin, and a drive groove is provided on the rotating head. The locking pin has a linkage part that is linked with the rotating head, and a rotating part located below the linkage part and rotatably cooperating with the rotating head. The rotating head slides along the axial direction of the locking pin, switching between the linkage part and the rotating part. This utility model has the following advantages and effects: it has a locking function, is low in cost, and will not affect the sales efficiency of the valve.

[0004] However, in the existing technology, the device uses a drive structure that drives the valve stem through a handwheel and a threaded transmission. When the operator turns the handwheel, the valve stem is raised or lowered through the thread engagement, thus opening and closing the gate. Under high pressure conditions, the positive pressure of the medium on the gate increases significantly, causing the resistance at the connection between the valve stem and the gate to increase geometrically. In addition, under high pressure, the valve stem is prone to slight deformation due to radial force, which reduces the thread engagement clearance between the valve stem and the handwheel. After long-term operation, the thread surface is prone to wear, which can lead to jamming.

[0005] Therefore, there is an urgent need to design a high-pressure bellows gate valve to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the existing problems.

[0007] The technical solution adopted to solve the above technical problems is: a high-pressure bellows gate valve, including a valve body and an upstream valve port and a downstream valve port fixedly connected to both sides of the valve body. Two valve seats are fixedly connected to the inner side wall of the valve body. The outer walls of the two valve seats are symmetrically provided with openings for material discharge. A valve plate is slidably installed on the opposite side of the two valve seats. A valve stem is fixedly installed on the top of the valve plate. A bellows is fixedly connected to the top of the valve body. The bottom end of the bellows is fixedly connected to the outer side wall of the valve stem. A drive rod is connected to the top of the valve stem. Handles for driving its up and down movement are engaged on both sides of the drive rod.

[0008] In a preferred embodiment of this utility model, a valve block is fixedly connected to the top of the valve plate, the top of the valve block is fixedly connected to the bottom of the bellows, and the bottom end of the valve stem passes through the top of the bellows and is fixedly connected to the top of the valve block.

[0009] As a preferred embodiment of this utility model, a drive housing is slidably connected to the outer side wall of the drive rod, and drive wheels are rotatably mounted on the outer side wall of the drive shaft at both ends of the drive housing. The two drive wheels are meshed with the outer side wall of the drive rod, and handles are fixedly connected to the outer side walls of both drive wheels.

[0010] As a preferred embodiment of this utility model, a sealing ring is installed on the top of the valve body, a valve cover is provided on the top of the sealing ring, the top of the bellows is installed between the sealing ring and the valve cover, and the inner walls of the valve body, the sealing ring, the bellows and the valve cover are threaded together with multiple fixing nuts.

[0011] As a preferred embodiment of this utility model, a bracket is fixedly connected to the top of the valve cover, the top of the bracket is fixedly connected to the bottom of the drive housing, a limit frame is fixedly connected to the outer side wall of the top of the valve cover, and the outer side wall of the valve stem is slidably mounted on the inner side wall of the limit frame.

[0012] As a preferred technical solution of this utility model, a fixed shaft is fixedly installed on the outer side wall of one of the handles, and a fixed ring is rotatably installed on the shaft wall of the two fixed shafts. A fixed groove is opened on the outer side wall of the other handle, and the other end of the fixed ring is engaged with the inner side wall of the fixed groove.

[0013] As a preferred technical solution of this utility model, the outer wall of the valve seat near the downstream valve port is provided with multiple flow guide holes.

[0014] The beneficial effects of this utility model are as follows: This invention connects a drive rod to the top of the valve stem and sets drive wheels with handles on both sides of the drive rod. Simply pressing or lifting the handles on both sides drives the valve stem and valve plate to complete the opening and closing action. This driving method uses the dual force-saving mechanism of lever principle and gear meshing to effectively disperse the driving resistance under high pressure. Compared with the traditional handwheel thread drive, it can easily complete the operation even under high pressure conditions, solving the problems of difficult driving and operator fatigue in high pressure environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a cross-sectional structural diagram of the valve body of this utility model.

[0016] In the diagram: 1. Valve body; 2. Valve seat; 3. Valve plate; 4. Valve block; 5. Bellows; 6. Valve stem; 7. Drive rod; 8. Sealing ring; 9. Valve cover; 10. Handle; 11. Drive wheel; 12. Drive shaft; 13. Fixing ring; 14. Fixing shaft; 15. Bracket; 16. Limiting bracket; 17. Fixing nut; 18. Guide hole; 19. Upstream valve port; 20. Downstream valve port; 21. Drive housing. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0022] Example 1 exist Figures 1-3 This utility model provides a high-pressure bellows gate valve technical solution: a high-pressure bellows gate valve includes a valve body 1 and an upstream valve port 19 and a downstream valve port 20 fixedly connected to both sides of the valve body 1. Two valve seats 2 are fixedly connected to the inner side wall of the valve body 1. The outer walls of the two valve seats 2 are symmetrically provided with openings for material discharge. A valve plate 3 is slidably installed on the opposite side of the two valve seats 2. A valve stem 6 is fixedly installed on the top of the valve plate 3. A bellows 5 is fixedly connected to the top of the valve body 1. The bottom end of the bellows 5 is fixedly connected to the outer side wall of the valve stem 6. A drive rod 7 is connected to the top of the valve stem 6. Handles 10 for driving its up and down movement are engaged on both sides of the drive rod 7.

[0023] In one aspect of this embodiment, a valve block 4 is fixedly connected to the top of the valve plate 3. The valve block 4 serves as a transition connector. The top of the valve block 4 is fixedly connected to the bottom of the bellows 5. The bottom end of the valve stem 6 passes through the top of the bellows 5 and is fixedly connected to the top of the valve block 4. This enhances the connection stability between the valve plate 3 and the valve stem 6 while providing a stable fixed foundation for the bellows 5, ensuring that the bellows expands and contracts synchronously when it rises and falls with the valve stem.

[0024] In one aspect of this embodiment, a drive housing 21 is slidably connected to the outer wall of the drive rod 7. The drive housing 21 provides mounting support and protection for the drive wheel 11 and the drive shaft 12. The guide groove on the inner wall restricts the movement direction of the drive rod 7, ensuring that the drive rod only moves up and down axially. The inner walls at both ends of the drive housing 21 are fixedly connected to the drive shaft 12. The outer walls of the two drive shafts 12 are rotatably mounted with drive wheels 11. The two drive wheels 11 are meshed with the outer walls of the drive rod 7. The outer walls of the two drive wheels 11 are fixedly connected with handles 10. The drive wheels 11, through meshing with the drive rod 7, convert the rotational force of the handles 10 into the axial force of the drive rod. The handles 10 provide a force application point for the operator, reducing the operating force through the lever principle.

[0025] In one aspect of this embodiment, a sealing ring 8 is installed on the top of the valve body 1, and a valve cover 9 is provided on the top of the sealing ring 8. The top of the bellows 5 is installed between the sealing ring 8 and the valve cover 9. The sealing ring 8 achieves static sealing between the valve body 1 and the valve cover 9, and at the same time provides top support for the bellows 5. The inner walls of the valve body 1, the sealing ring 8, the bellows 5 and the valve cover 9 are threaded together with multiple fixing nuts 17. The fixing nuts 17 tightly lock the valve body, the sealing ring, the bellows and the valve cover to form an integral sealing structure to resist the impact of high pressure medium.

[0026] In one aspect of this embodiment, a bracket 15 is fixedly connected to the top of the valve cover 9, and the top of the bracket 15 is fixedly connected to the bottom of the drive housing 21. A limit frame 16 is fixedly connected to the outer side wall of the top of the valve cover 9. The outer side wall of the valve stem 6 slides along the guide hole of the limit frame 16, and the guide hole restricts its radial sway. The outer side wall of the valve stem 6 is slidably mounted on the inner side wall of the limit frame 16.

[0027] In one aspect of this embodiment, a fixing shaft 14 is fixedly installed on the outer side wall of one handle 10, and a fixing ring 13 is rotatably installed on the shaft wall of the two fixing shafts 14. A fixing groove is opened on the outer side wall of the other handle 10, and the other end of the fixing ring 13 is engaged with the inner side wall of the fixing groove. When the valve completes the opening and closing and reaches the target state, the operator rotates the fixing ring 13 until the free end of the fixing ring 13 is engaged in the fixing groove of the other handle 10. The anti-slip texture of the fixing groove is tightly engaged with the end of the fixing ring to prevent the handle 10 from rotating.

[0028] In one aspect of this embodiment, the outer wall of the valve seat 2 near the downstream valve port 20 is provided with a plurality of flow guide holes 18.

[0029] The working principle of this utility model is as follows: When it is necessary to open or close the valve, first release the locking structure, hold the handles 10 on both sides with both hands and lift them upward. At this time, the handles 10 drive the drive wheel 11 fixed thereto to rotate around the drive shaft 12. The drive wheel 11 causes the drive rod 7 to rise or fall vertically along the guide groove on the inner wall of the drive housing 21, which in turn drives the valve rod 6 connected thereto to rise. This causes the valve plate 3 to slide upward along the opposite side of the two valve seats 2. As the valve plate 3 gradually separates from the sealing surface of the valve seat 2, the high-pressure medium from the upstream valve port 19 enters the valve body 1 and flows into the valve cavity through the symmetrical discharge openings on the outer walls of the two valve seats 2, thus achieving stable flow of the medium. During this process, the bottom end of the bellows 5 rises synchronously with the valve block 4, while the top end remains stationary because it is fixed between the sealing ring 8 and the valve cover 9. The bellows then stretches and always wraps around the connection between the valve rod 6 and the valve block 4, preventing the medium from leaking from the gap between the valve rod 6 and the valve body 1.

[0030] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-pressure bellows gate valve, comprising a valve body (1) and an upstream valve port (19) and a downstream valve port (20) fixedly connected to both sides of the valve body (1), characterized in that: Two valve seats (2) are fixedly connected to the inner wall of the valve body (1). The outer walls of the two valve seats (2) are symmetrically provided with openings for material discharge. A valve plate (3) is slidably installed on the opposite side of the two valve seats (2). A valve stem (6) is fixedly installed on the top of the valve plate (3). A bellows (5) is fixedly connected to the top of the valve body (1). The bottom end of the bellows (5) is fixedly connected to the outer wall of the valve stem (6). A drive rod (7) is connected to the top of the valve stem (6). Handles (10) for driving its up and down movement are meshed on both sides of the drive rod (7).

2. The high-pressure bellows gate valve according to claim 1, characterized in that: A valve block (4) is fixedly connected to the top of the valve plate (3). The top of the valve block (4) is fixedly connected to the bottom of the bellows (5). The bottom end of the valve stem (6) passes through the top of the bellows (5) and is fixedly connected to the top of the valve block (4).

3. A high-pressure bellows gate valve according to claim 1, characterized in that: The outer wall of the drive rod (7) is slidably connected to a drive housing (21), and the inner walls at both ends of the drive housing (21) are fixedly connected to drive shafts (12). Drive wheels (11) are rotatably mounted on the outer walls of the two drive shafts (12). The two drive wheels (11) are meshed with the outer walls of the drive rod (7), and handles (10) are fixedly connected to the outer walls of the two drive wheels (11).

4. A high-pressure bellows gate valve according to claim 1, characterized in that: A sealing ring (8) is installed on the top of the valve body (1), and a valve cover (9) is provided on the top of the sealing ring (8). The top of the bellows (5) is installed between the sealing ring (8) and the valve cover (9). The inner walls of the valve body (1), sealing ring (8), bellows (5) and valve cover (9) are threaded together with multiple fixing nuts (17).

5. A high-pressure bellows gate valve according to claim 4, characterized in that: The top of the valve cover (9) is fixedly connected to a bracket (15), the top of the bracket (15) is fixedly connected to the bottom of the drive housing (21), the outer side wall of the top of the valve cover (9) is fixedly connected to a limit frame (16), and the outer side wall of the valve stem (6) is slidably installed on the inner side wall of the limit frame (16).

6. A high-pressure bellows gate valve according to claim 1, characterized in that: One of the handles (10) has a fixed shaft (14) fixedly installed on the outer side wall on both sides. The shaft walls of the two fixed shafts (14) are rotatably installed with a fixed ring (13). The outer side wall of the other handle (10) has a fixed groove, and the other end of the fixed ring (13) is engaged with the inner side wall of the fixed groove.

7. A high-pressure bellows gate valve according to claim 1, characterized in that: The valve seat (2) has multiple guide holes (18) on the outer wall near the downstream valve port (20).

Images