Gate valve for circulating cooling water system

Abstract

The utility model discloses a gate valve for a circulating cooling water system, which comprises a valve body, connecting flanges are arranged at two ends of the valve body, a driving structure is arranged on the valve body, and a valve core component is arranged in the valve body. The valve element assembly comprises a connecting plate connected with the valve body in a sliding mode, gate plates which are symmetrically arranged are connected into the connecting plate in a sliding mode, and limiting blocks are arranged on the sides, close to each other, of the gate plates. The valve element assembly is arranged, the conical rod is adopted to drive the two gate plates to move in the direction away from each other, then two times of plugging are formed in the valve body, after frequent use, even if one pressure-bearing gate plate permeates, the other gate plate can still keep good sealing performance, the sealing effect of the whole valve is guaranteed, and the service life of the valve is prolonged. The service life and the maintenance period of the valve are prolonged, and the use cost of enterprises is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline valves, in particular to a gate valve used in a circulating cooling water system. Background Art

[0002] The gate valve is a gate plate that opens and closes. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened or fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface is welded with metal materials to increase wear resistance. The gate plate has a rigid gate plate and an elastic gate plate.

[0003] In the prior art, the water pressure in the pipeline of the circulating cooling water system is relatively low. However, since a single circulating cooling water system often carries multiple equipment in a factory, the gate valve is used in large quantities and frequently. At the same time, when the gate valve is closed, the equipment is often in a state of inspection or maintenance. Once water seepage occurs, it is easy to cause damage to the equipment, and there is a higher demand for anti-water seepage. For this reason, we propose a gate valve for a circulating cooling water system to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes a gate valve for a circulating cooling water system.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A gate valve for a circulating cooling water system comprises a valve body, two ends of the valve body are provided with connecting flanges, a driving structure is provided on the valve body, and a valve core assembly is provided in the valve body;

[0007] The valve core assembly includes a connecting plate slidably connected to the valve body, a symmetrically arranged gate plate is slidably connected in the connecting plate, and a limit block is provided on the side where the gate plates are close to each other, a conical rod is slidably connected in the connecting plate, the upper end of the conical rod is fixedly connected to the driving structure, a gear rod is slidably connected to one side of the conical rod, and the gear rod is fixedly connected to the conical rod through a compression spring, a driving block for driving the gear rod to move is provided in the valve body, and a step groove matching the gate plate is provided on the inner wall of the valve body.

[0008] Preferably, the driving structure comprises a threaded rod threadably connected to the valve body, the lower end of the threaded rod is rotatably connected to a driving rod, and the driving rod is fixedly connected to the tapered rod.

[0009] Preferably, a connecting frame is provided on the valve body, and a driving motor is fixedly connected to the connecting frame, a speed change gear set is provided at the output end of the driving motor, and a telescopic sleeve is fixedly connected to the output end of the speed change gear set, and the telescopic sleeve is fixedly connected to the threaded rod.

[0010] Preferably, sealing gaskets are fixedly connected to the sides of the gate plates away from each other, and arc-shaped grooves are provided in the step grooves.

[0011] Preferably, a receiving cavity is provided in the valve body, and a chamfer is provided at the lower end of the receiving cavity.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, by providing a valve core assembly, a conical rod is used to drive two gate plates to move away from each other, thereby forming two seals in the valve body. After frequent use, even if one of the pressure-bearing gate plates leaks, the other gate plate can still maintain good sealing performance, ensuring the overall sealing effect of the valve, extending the service life and maintenance period of the valve, and reducing the use cost of the enterprise.

[0014] 2. In the present utility model, by providing a driving structure, a driving motor can be used in cooperation with a speed-changing gear set to drive the threaded rod to rotate. This not only facilitates the user to open and close the valve, but also can achieve remote control or automatic control when paired with remote control equipment, making it convenient for the user to use this kind of gate valve and ensuring that this kind of gate valve can better integrate into the circulating cooling water system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a three-dimensional structural schematic diagram of a gate valve for a circulating cooling water system proposed by the present utility model;

[0016] Figure 2 FIG. 2 is a sectional structural schematic diagram of a gate valve for a circulating cooling water system proposed by the present utility model;

[0017] Figure 3 FIG. 3 is a structural schematic diagram of a connecting plate of a gate valve for a circulating cooling water system proposed by the present utility model;

[0018] Figure 4 FIG. 4 is a structural schematic diagram of a retaining rod of a gate valve for a circulating cooling water system proposed by the present utility model;

[0019] Figure 5 FIG. 5 is a structural schematic diagram of a connecting plate of Embodiment 2 of a gate valve for a circulating cooling water system proposed by the present utility model.

[0020] In the figures: 1, valve body; 2, connecting flange; 3, connecting plate; 4, gate plate; 5, limit block; 6, conical rod; 7, retaining rod; 8, driving block; 9, step groove; 10, threaded rod; 11, driving rod; 12, connecting frame; 13, driving motor; 14, speed-changing gear set; 15, sealing gasket; 16, receiving cavity; 17, support plate; 18, spring; 19, X-shaped rotating bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Refer to Figures 1-4 , a gate valve for a circulating cooling water system, including a valve body 1. Connecting flanges 2 are provided at both ends of the valve body 1, and the connecting flanges 2 are used to connect the valve body 1 to a pipeline. A driving structure is provided on the valve body 1, and a valve core assembly is provided inside the valve body 1;

[0023] The valve core assembly includes a connecting plate 3 slidably connected to the valve body 1. Symmetrically arranged gate plates 4 are slidably connected inside the connecting plate 3. Limiting blocks 5 are provided on the sides of the gate plates 4 close to each other. A tapered rod 6 is slidably connected inside the connecting plate 3. The upper end of the tapered rod 6 is fixedly connected to the driving structure. A retaining rod 7 is slidably connected to one side of the tapered rod 6, and the retaining rod 7 is fixedly connected to the tapered rod 6 through a compression spring. A driving block 8 for driving the retaining rod 7 to move is provided inside the valve body 1. A step groove 9 matching the gate plate 4 is provided on the inner wall of the valve body 1;

[0024] In this design, when the gate valve is closed, the driving structure drives the connecting plate 3 to move downward. After the connecting plate 3 abuts against the lower inner wall of the valve body 1 and the retaining rod 7 abuts against the driving block 8, at this time, the tapered rod 6 can slide relative to the connecting plate 3 and insert into the connecting plate 3. Then, the lower end of the tapered rod 6 abuts against the limiting block 5, driving the two gate plates 4 to slide away from each other until the gate plates 4 are stuck in the step groove 9, thereby disconnecting the water flow in the pipeline. In the closed state of the gate valve, one of the gate plates 4 is in a pressure-bearing state, and the other gate plate 4 has a lower load. After long-term use, even if the gate plate 4 in the pressure-bearing state leaks water due to aging or other factors, after the cooling water passes through this gate plate 4, it will flow to the other gate plate 4, and thus the cooling water still cannot pass through this valve body 1. And in this design, the pressure of the cooling water on the pressure-bearing gate plate 4 can make the other gate plate 4 fit more tightly with the step groove 9 (requiring a small deformation of the upper end of the tapered rod 6). Even in the case of relatively large water pressure, it will have a good sealing effect. This design meets the requirements for the sealing performance of the gate valve in the circulating cooling water system, while extending the service life and maintenance period of the valve, and reducing the use cost of the enterprise.

[0025] Furthermore, the driving structure includes a threaded rod 10 threadedly connected to the valve body 1. The lower end of the threaded rod 10 is rotatably connected to a driving rod 11. The driving rod 11 is fixedly connected to the conical rod 6. A chute is provided on the driving rod 11. The upper end of the blocking rod 7 is located in the chute on the driving rod 11. In this design, the threaded rod 10 is used to drive the driving rod 11 to move up and down, and the self-locking property of the thread is utilized to ensure that after the valve is closed, the valve core assembly can be fixed to the valve body 1 and block the cooling water from passing through the valve.

[0026] Furthermore, a connecting frame 12 is provided on the valve body 1, and a driving motor 13 is fixedly connected to the connecting frame 12. An output end of the driving motor 13 is provided with a speed-changing gear set 14, and an output end of the speed-changing gear set 14 is fixedly connected to a telescopic sleeve. The telescopic sleeve can drive the threaded rod 10 to rotate under the drive of the speed-changing gear 14, and the length of the telescopic sleeve can change. The telescopic sleeve is fixedly connected to the threaded rod 10;

[0027] In this design, the driving motor 13 cooperates with the speed-changing gear set 14 to drive the threaded rod 10 to rotate, which can not only facilitate the user to open and close the valve, but also, when paired with a remote control device, achieve remote control or automatic control, making it convenient for the user to use this kind of gate valve and ensuring that this kind of gate valve can better integrate into the circulating cooling water system.

[0028] Furthermore, sealing gaskets 15 are fixedly connected to both sides of the gate plate 4 away from each other, and an arc-shaped groove is provided in the step groove 9;

[0029] By providing the sealing gasket 15 in cooperation with the arc-shaped groove, the gate plate 4 can be more closely attached to the step groove 9, ensuring the sealing effect. Generally, the water level of the cooling water is not higher than 80 °C, and the water pressure in the circulating cooling water system is relatively low. Therefore, setting an elastic seal can meet the sealing requirements while reducing the precision requirements during the production of this kind of gate valve.

[0030] Furthermore, a receiving cavity 16 is provided in the valve body 1, and a chamfer is provided at the lower end of the receiving cavity 16;

[0031] In this design, the chamfer is used to drive the gate plate 4 to move towards each other, ensuring that when this kind of gate valve is opened, the gate plate 4 can be retracted into the connecting plate 3.

[0032] Embodiment 2

[0033] As Figure 5 shown, the difference between this embodiment and Embodiment 1 is:

[0034] In this embodiment, a support plate 17 is arranged inside the inner cavity of the connecting plate 3. Springs 18 are installed on both sides of the support plate 17, and the other ends of the two springs 18 are respectively fixedly connected to the inner sides of the two limit blocks 5. By adding the springs 18, a resetting effect is exerted on the two limit blocks 5. After the tapered rod 6 moves upward, the two limit blocks 5 are reset under the elastic force of the springs 18, so that the gasket 15 will not be worn by the arc-shaped groove.

[0035] In this embodiment, an X-shaped rotating bracket 19 is rotatably installed in the inner cavity of the connecting plate 3, and the two sides of the X-shaped rotating bracket 19 are respectively in movable contact with the inner sides of the two limit blocks 5. When the tapered rod 6 moves downward, it is inserted into the X-shaped rotating bracket 19, so that the four ends of the X-shaped rotating bracket 19 abut against the upper and lower sides of the limit blocks 5. This way enables the X-shaped rotating bracket 19 to act as a substitute for the tapered rod 6 to apply force to the limit blocks 5, which is beneficial to the uniform sealing of the gasket 15. It should be noted here that the X-shaped rotating bracket 19 is composed of a rotating shaft fixedly installed in the inner cavity of the connecting plate 3 and two rod bodies rotatably installed outside the rotating shaft and arranged in a staggered manner. The force is transmitted to the limit blocks 5 through the rod bodies.

[0036] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A gate valve for a circulating cooling water system, comprising a valve body (1), characterized in that, Both ends of the valve body (1) are provided with connecting flanges (2). A driving structure is provided on the valve body (1), and a valve core assembly is provided inside the valve body (1). The valve core assembly includes a connecting plate (3) slidably connected to the valve body (1). Inside the connecting plate (3), symmetrically arranged gate plates (4) are slidably connected. On the sides of the gate plates (4) close to each other, limit blocks (5) are provided. Inside the connecting plate (3), a tapered rod (6) is slidably connected. The upper end of the tapered rod (6) is fixedly connected to the driving structure. A blocking rod (7) is slidably connected to one side of the tapered rod (6), and the blocking rod (7) is fixedly connected to the tapered rod (6) through a compression spring. A driving block (8) for driving the blocking rod (7) to move is provided inside the valve body (1). A stepped groove (9) matching the gate plate (4) is provided on the inner wall of the valve body (1).

2. The gate valve for a circulating cooling water system according to claim 1, characterized in that, The driving structure includes a threaded rod (10) threadedly connected to the valve body (1). The lower end of the threaded rod (10) is rotatably connected to a driving rod (11), and the driving rod (11) is fixedly connected to the tapered rod (6).

3. The gate valve for a circulating cooling water system according to claim 2, wherein A connecting frame (12) is provided on the valve body (1), and a driving motor (13) is fixedly connected to the connecting frame (12). A speed-changing gear set (14) is provided at the output end of the driving motor (13), and a telescopic sleeve is fixedly connected to the output end of the speed-changing gear set (14). The telescopic sleeve is fixedly connected to the threaded rod (10).

4. The gate valve for a circulating cooling water system according to claim 1, characterized in that, Sealing gaskets (15) are fixedly connected to the sides of the gate plates (4) away from each other. An arc-shaped groove is provided in the stepped groove (9).

5. The gate valve for a circulating cooling water system according to claim 1, characterized in that, An accommodation cavity (16) is provided inside the valve body (1), and a chamfer is provided at the lower end of the accommodation cavity (16).

6. The gate valve for a circulating cooling water system according to claim 1, characterized in that: A support plate (17) is provided inside the inner cavity of the connecting plate (3). Springs (18) are installed on both sides of the support plate (17), and the other ends of the two springs (18) are respectively fixedly connected to the inner sides of the two limit blocks (5).

7. The gate valve for a circulating cooling water system according to claim 6, characterized in that: An X-shaped rotating bracket (19) is rotatably installed in the inner cavity of the connecting plate (3), and the two sides of the X-shaped rotating bracket (19) are respectively in movable contact with the inner sides of the two limit blocks (5).

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