Gate valve with adjustable valve plate

Abstract

The utility model relates to the technical field of gate valves, and discloses a gate valve with an adjustable valve plate, which comprises a valve body, a valve rod and an upper valve cover, the lower end part of the valve rod is sequentially connected with an adjusting piece I and an adjusting piece II from top to bottom, and each of the adjusting piece I and the adjusting piece II comprises a gate plate and an adjusting sleeve; the positions, corresponding to the first adjusting piece and the second adjusting piece, of the valve rod are connected with driving pieces through threads, arc-shaped plates are symmetrically arranged on the left side and the right side of each driving piece, guide rods are arranged on the outer sides of the adjacent arc-shaped plates, the outer ends of the guide rods are in threaded connection with fastening bolts, adjusting sleeves are symmetrically arranged on the two sides of the gate plate, and the fastening bolts penetrate through the adjusting sleeves. Flexible gaskets are embedded in the outer sides of the adjacent adjusting sleeves, and the guide rods are sleeved with reset springs. According to the scheme, the situation that due to the fact that the gradient of the contact face of the gate plate and the valve body is changed, the gate plate moves upwards, and contact abrasion between the gate plate and the valve body occurs is avoided, it is further guaranteed that the gate valve keeps the sealing performance for a long time, and the service life of the gate plate can be greatly prolonged.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically to a gate valve with an adjustable valve plate. Background Technology

[0002] A gate valve is a common type of valve, primarily used to control the flow of fluid media by opening or closing a gate. It typically consists of a valve body, a gate, a stem, and a handle. The valve body contains a valve cavity with an inlet pipe and an outlet pipe communicating with it. The inlet pipe connects to the valve cavity as the inlet, and the outlet pipe connects to the valve cavity as the outlet. The gate slides up and down within the valve cavity and seals both the inlet and outlet pipes, thus isolating them. The stem is threaded into a threaded hole on the valve body, with one end rotatably connected to the gate within the valve cavity and the other end fixedly connected to the handle on top of the valve body. When the handwheel is turned, the stem rotates relative to the valve body, causing it to rise and fall. This, in turn, moves the gate within the valve cavity up and down, opening or closing the connection between the inlet and outlet of the valve cavity, thus controlling the valve's operation.

[0003] During the operation of a gate valve, the gate plate undergoes thermal expansion due to environmental factors, such as high temperatures. This changes the inclination of the contact surface between the gate plate and the valve body, leading to upward movement of the gate plate and subsequent wear against the valve body, thus reducing the gate plate's service life. To address this issue, we propose a gate valve with an adjustable gate plate. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustable gate valve to solve the problem mentioned in the background art where, during the use of the gate valve, the gate expands due to the working environment, such as high temperature, causing the inclination of the contact surface between the gate and the valve body to change, which in turn leads to the upward movement of the gate and contact wear with the valve body, reducing the service life of the gate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable gate valve, comprising a valve body, a valve stem, and an upper valve cover. The lower end of the valve stem is sequentially connected to an adjusting component one and an adjusting component two from top to bottom. Both adjusting component one and adjusting component two include a gate plate. A driving component is threadedly connected to the valve stem corresponding to the positions of adjusting component one and adjusting component two. Arc-shaped plates are symmetrically arranged on the left and right sides of the driving component. A guide rod is arranged on the outer side of adjacent arc-shaped plates. The guide rod is movably inserted into the gate plate. A fastening bolt is threadedly connected to the outer end of the guide rod. Adjusting sleeves are symmetrically arranged on both sides of the gate plate. The fastening bolt passes through the adjusting sleeve. A flexible washer is embedded in the outer side of adjacent adjusting sleeves. A return spring is sleeved on the guide rod.

[0006] Preferably, the gate plate has a slot for inserting a guide rod, and the slot communicates with the inner cavity of the gate plate.

[0007] Preferably, the guide rod and the fastening bolt are collinear, and both the guide rod and the fastening bolt are perpendicular to the center line of the valve stem.

[0008] Preferably, the flexible washer is located on the outside of the fastening bolt, and a positioning rod is provided between adjacent fastening bolts.

[0009] Preferably, the driving member is disposed between the symmetrical arc-shaped plates, and the driving member and the arc-shaped plates are in contact.

[0010] Preferably, the adjusting sleeve is fitted onto both sides of the gate.

[0011] Preferably, the gate plate has an internal groove for storing the first and second adjustment components, and the internal groove communicates with the inner cavity of the gate plate.

[0012] Preferably, the reset spring is disposed within a built-in groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This type of adjustable gate valve can drive the adjusting sleeve to move to both sides during the descent of the gate, thereby blocking the through hole of the valve body to complete the valve closure. When the gate rises, it can drive the gate to move to the center, thereby further avoiding wear on the gate during the rising process and preventing the gate from jamming due to thermal expansion. This allows the gate valve to maintain its sealing performance for a long time and greatly increases the service life of the gate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the gate assembly and valve stem connection of this utility model;

[0017] Figure 3 This is a partial separation diagram of the gate assembly of this utility model;

[0018] Figure 4 This is a cross-sectional view of the gate assembly of this utility model;

[0019] Figure 5 For the present utility model Figure 4 Enlarged schematic diagram at point M.

[0020] In the diagram: 1. Valve body; 2. Valve stem; 3. Upper valve cover; 4. Adjusting component one; 41. Gate; 42. Adjusting sleeve; 43. Flexible washer; 44. Internal groove; 441. Drive component; 442. Arc plate; 443. Guide rod; 444. Fastening bolt; 445. Return spring; 5. Adjusting component two. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: Please refer to Figure 1-5 This utility model provides a technical solution: an adjustable gate valve, including a valve body 1, a valve stem 2, and an upper valve cover 3. The lower end of the valve stem 2 is sequentially connected to an adjusting component 4 and an adjusting component 5 from top to bottom. It is worth noting that during installation, the size of adjusting component 4 and adjusting component 5 can be individually adjusted according to the installation position.

[0023] Please see Figure 2 and Figure 3 The regulating component 4 and regulating component 5 both include a gate 41, with regulating sleeves 42 fitted onto both sides of the gate 41. The inner diameter of the regulating sleeve 42 is equal to the corresponding outer diameter of the gate 41. A driving component 441 is threadedly connected to the valve stem 2 at the position corresponding to regulating component 4 and regulating component 5. The driving component 441 and the valve stem 2 are integrally machined. Adjacent driving components 441 are parallel to each other.

[0024] Furthermore, symmetrical arc-shaped plates 442 are arranged on both sides of the driving member 441, and adjacent arc-shaped plates 442 are part of a conical ring. When the driving member 441 moves downward, the symmetrically arranged arc-shaped plates 442 can move simultaneously from the inside to the outside. The driving member 441 is located between the symmetrical arc-shaped plates 442, and the driving member 441 and the arc-shaped plates 442 are in contact.

[0025] Furthermore, a guide rod 443 is provided on the outer side of the adjacent arc-shaped plate 442. The guide rod 443 is movably inserted into the gate plate 41. The gate plate 41 has a slot for inserting the guide rod 443, and the slot communicates with the inner cavity of the gate plate 41. Adjusting sleeves 42 are symmetrically arranged on both sides of the gate plate 41. Fastening bolts 444 pass through the adjusting sleeves 42. The outer end of the guide rod 443 is threaded with a fastening bolt 444. The guide rod 443 and the fastening bolt 444 are collinear, and both the guide rod 443 and the fastening bolt 444 are perpendicular to the center line of the valve stem 2. The fastening bolt 444 fixes the position of the adjusting sleeve 42, so that the movement of the adjusting sleeve 42 is driven by the fastening bolt 444. The fastening bolt 444 is fixed on the guide rod 443. When the guide rod 443 moves inward or outward, the fastening bolt 444 can drive the adjusting sleeve 42 to move in the same direction.

[0026] Please see Figure 3 , Figure 4 and Figure 5 The adjacent adjusting sleeve 42 has a flexible washer 43 embedded on its outer side. The flexible washer 43 is made of flexible rubber. The elasticity of the flexible rubber can reduce the contact friction between the adjusting sleeve 42 and the valve body 1. After wear, only the flexible washer 43 needs to be replaced, which further reduces the operating cost of the gate valve.

[0027] Furthermore, a return spring 445 is sleeved on the guide rod 443. A flexible washer 43 is located on the outside of the fastening bolts 444, and a positioning rod 45 is provided between adjacent fastening bolts 444. The return spring 445 ensures that the spacing between the symmetrical arc-shaped plates 442 is always minimized in the initial state. The positioning rod 45 facilitates the alignment and connection of the fastening bolts 444 and the guide rod 443.

[0028] It is worth noting that the gate plate 41 has an internal groove 44 for storing the first adjusting component 4 and the second adjusting component 5, and the internal groove 44 communicates with the inner cavity of the gate plate 41. The reset spring 445 is located in the internal groove 44.

[0029] Working principle: In this type of adjustable gate valve, the valve stem 2 descends, driving the drive component 441 downwards. After the drive component 441 is positioned between symmetrically arranged arc-shaped plates 442, it pushes the symmetrically arranged arc-shaped plates 442 to move laterally. Through the connection of the fastening bolts 444, the adjusting sleeve 42 can move outwards from the valve body 1. The gate plate 41 blocks the through hole of the valve body 1 to complete the valve closure. When the valve stem 2 rises, it drives the drive component 441 upwards. At this time, through the elastic action of the return spring 445, the adjusting sleeve 42 can be engaged with the valve body 1. This facilitates the upward movement of the gate valve 41, reduces the wear of the gate plate during the upward movement, and prevents the gate plate 41 from jamming due to thermal expansion. This allows the gate valve to maintain its sealing performance for a long time and greatly increases the service life of the gate plate.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A valve plate adjustable gate valve comprising a valve body (1), a valve stem (2) and an upper bonnet (3), characterized in that: The lower end of the valve stem (2) is connected with adjusting part one (4) and adjusting part two (5) from top to bottom, the adjusting part one (4) and the adjusting part two (5) both include a shutter (41), the valve stem (2) is connected with a driving part (441) corresponding to the position of the adjusting part one (4) and the adjusting part two (5) through thread, the driving part (441) is symmetrically provided with an arc plate (442) on the left and right sides, the adjacent arc plate (442) is provided with a guide rod (443) outside, the guide rod (443) is movably inserted into the shutter (41), the guide rod (443) is threadedly connected with a fastening bolt (444) at the outer end, the shutter (41) is symmetrically provided with an adjusting sleeve (42) on the two sides, the fastening bolt (444) passes through the adjusting sleeve (42), the adjacent adjusting sleeve (42) is inlaid with a flexible gasket (43) outside, and the guide rod (443) is sleeved with a reset spring (445).

2. A valve plate adjustable gate valve according to claim 1, characterized in that: The shutter (41) is provided with a hole groove for inserting the guide rod (443), and the hole groove is communicated with the inner cavity of the shutter (41).

3. A valve plate adjustable gate valve according to claim 1, characterized in that: The guide rod (443) and the fastening bolt (444) are collinear, and the guide rod (443) and the fastening bolt (444) are both perpendicular to the center line of the valve stem (2).

4. A valve plate adjustable gate valve according to claim 1, characterized in that: The flexible gasket (43) is arranged outside the fastening bolt (444), and a positioning rod (45) is arranged between the adjacent fastening bolts (444).

5. A valve plate adjustable gate valve according to claim 1, characterized in that: The driving part (441) is arranged between the symmetric arc plates (442), and the driving part (441) and the arc plates (442) are attached.

6. A valve plate adjustable gate valve according to claim 1, characterized in that: The adjusting sleeve (42) is sleeved on the two sides of the shutter (41).

7. A valve plate adjustable gate valve according to claim 1, characterized in that: The shutter (41) is provided with a built-in groove (44) for storing the adjusting part one (4) and the adjusting part two (5), and the built-in groove (44) is communicated with the inner cavity of the shutter (41).

8. A valve plate adjustable gate valve according to claim 7, characterized in that: The reset spring (445) is arranged in the built-in groove (44).

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