Large-caliber low-pressure bypass inlet electric isolation gate valve

Abstract

The utility model relates to the technical field of electric isolation gate valves, and discloses a large-caliber low-pressure bypass inlet electric isolation gate valve which comprises a valve body, a valve seat is arranged in the middle of the valve body, linings are arranged on the inner side walls of the two ends of the valve body, a valve deck is installed at the upper end of the valve body, and a valve cover is installed at the lower end of the valve deck. An electric head with a hand wheel is arranged at the top of the valve deck, the left end of the valve body is connected with an automatic cleaning filter, a left gate plate is arranged in the valve seat, a valve element is arranged on the right side of the left gate plate, and a right gate plate is arranged on the right side of the valve element. The left gate plate and the right gate plate are arranged, the wedge type double-gate-plate structure is adopted, and the wedge type double-gate-plate structure can solve the problems that in actual working conditions, a wedge type single-gate-plate structure is prone to generating, if the valve body is subjected to accidental pressure or torque, the valve body is likely to be twisted, and the gate plates cannot be normally opened; however, the double-gate structure can still be normally opened because the sealing load of the valve seat is eliminated before the gate tries to be opened.

Description

Technical Field

[0001] This utility model relates to the field of electric isolating gate valve technology, specifically a large-diameter low-pressure bypass inlet electric isolating gate valve. Background Technology

[0002] Simply put, an electric valve is a valve controlled by an electric actuator, thereby opening and closing the valve. It can be divided into two parts: the upper part is the electric actuator, and the lower part is the valve itself. The large-diameter low-pressure bypass inlet electric isolation gate valve (Z962Y-160V F91 DN700) has a design pressure of 6.73MPa, a temperature of 577℃, a pipe size of ID699×31, is made of A335P91 material, and has a design flow rate of 350t / h; it belongs to the large-diameter gate valve category.

[0003] Existing electric isolation gate valves are prone to failure to open properly if the valve body is subjected to unexpected pressure or torque during use, which may cause the valve body to twist. Therefore, there is an urgent need for a large-diameter, low-pressure bypass inlet electric isolation gate valve to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a large-diameter low-pressure bypass inlet electric isolation gate valve to solve the problem mentioned in the background art that if the valve body is subjected to unexpected pressure or torque during use, it may cause the valve body to twist, which may easily lead to the inability to open the gate normally.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A large-diameter, low-pressure bypass inlet electric isolation gate valve includes a valve body, a valve seat located in the middle of the valve body, inner liners on the inner walls of both ends of the valve body, a valve cover mounted on the upper end of the valve body, an electric actuator with a handwheel on the top of the valve cover, an automatic cleaning filter connected to the left end of the valve body, a left gate plate inside the valve seat, a valve core on the right side of the left gate plate, a right gate plate on the right side of the valve core, a valve stem mounted on the top of the valve core, a support member inside the valve cover, a connecting rod at the upper end of the support member, the upper end of the connecting rod passing through the top of the valve cover and connecting to the electric actuator with a handwheel, the upper end of the valve stem passing through the top of the valve body, the bottom of the valve cover, and the support member from bottom to top and connecting to the connecting rod, an outlet on the automatic cleaning filter connected to the left end of the valve body, an inlet on the upper left side of the automatic cleaning filter, a drain valve at the bottom of the automatic cleaning filter, and an electric motor for the automatic cleaning filter.

[0007] In a preferred embodiment of this invention, the bottom of the connecting rod is in contact with the top of the support member, but they are not connected.

[0008] As a preferred embodiment of this utility model, the left gate and the right gate are arranged symmetrically about the valve core.

[0009] In a preferred embodiment of this invention, the left and right sides of the valve core are in contact with one side of the left gate and the right gate, respectively, but are not connected to each other.

[0010] In a preferred embodiment of this invention, the valve stem and the valve core are movably connected.

[0011] As a preferred embodiment of this invention, the lining is made of rubber.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model adopts a wedge-type double gate structure by setting a left gate and a right gate. The wedge-type double gate structure can solve the following problems that are easily caused by the wedge-type single gate structure in actual working conditions. If the valve body is subjected to unexpected pressure or torque, it may cause the valve body to twist, resulting in the gate not being able to open normally. However, the double gate structure can still open normally because the valve seat sealing load has been eliminated before the gate attempts to open. Attached Figure Description

[0014] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

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

[0016] Figure 2 This is a cross-sectional view of part of the structure of this utility model;

[0017] Figure 3 This is an enlarged structural schematic diagram of the automatic cleaning filter of this utility model.

[0018] In the diagram: 1. Valve body; 2. Liner; 3. Valve seat; 4. Valve cover; 5. Electric motor with handwheel; 6. Automatic cleaning filter; 7. Left gate; 8. Right gate; 9. Valve core; 10. Valve stem; 11. Connecting rod; 12. Support component; 13. Inlet; 14. Outlet; 15. Drain valve; 16. Electric motor. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. In the embodiments of the present utility model, the different types of cross-sectional lines are not labeled according to national standards, nor do they specify material requirements for the components; they are used to distinguish the cross-sectional views of the components in the drawings.

[0020] Please see Figure 1-3 A large-diameter low-pressure bypass inlet electric isolation gate valve includes a valve body 1, a valve seat 3 located in the middle of the valve body 1, and inner liners 2 on the inner walls of both ends of the valve body 1. A valve cover 4 is installed on the upper end of the valve body 1, and an electric actuator 5 with a handwheel is located on the top of the valve cover 4. An automatic cleaning filter 6 is connected to the left end of the valve body 1. A left gate 7 is located inside the valve seat 3, a valve core 9 is located to the right of the left gate 7, and a right gate 8 is located to the right of the valve core 9. The valve body 1 employs a wedge-type double gate structure. This wedge-type double gate structure can solve the following problems that are easily caused by the wedge-type single gate structure in actual working conditions: if the valve body 1 is subjected to unexpected pressure or torque, it may cause the valve body 1 to twist, resulting in the gate not being able to open normally. However, the double gate structure still... It can be opened normally because the valve seat sealing load has been eliminated before the gate attempts to open. The valve core 9 is equipped with a valve stem 10. The valve cover 4 is equipped with a support member 12. The upper end of the support member 12 is equipped with a connecting rod 11. The upper end of the connecting rod 11 passes through the top of the valve cover 4 and is connected to the electric head 5 with a handwheel. The upper end of the valve stem 10 passes through the top of the valve body 1, the bottom of the valve cover 4 and the support member 12 from bottom to top and is connected to the connecting rod 11. The outlet 14 on the automatic cleaning filter 6 is connected to the left end of the valve body 1. The upper left side of the automatic cleaning filter 6 is equipped with an inlet 13. The bottom of the automatic cleaning filter 6 is equipped with a drain valve 15. The electric motor 16 of the automatic cleaning filter 6 is also provided.

[0021] The bottom of the connecting rod 11 is in contact with the top of the support member 12, but they are not connected.

[0022] The left gate 7 and the right gate 8 are arranged symmetrically about the valve core 9.

[0023] The left and right sides of the valve core 9 are in contact with one side of the left gate 7 and the right gate 8, respectively, but are not connected.

[0024] The valve stem 10 and the valve core 9 are connected in a movable manner.

[0025] The inner lining 2 is made of rubber.

[0026] The working principle and usage process of this utility model are as follows: First, when working, the electric head 5 with handwheel is started and the valve stem 10 is rotated in the support member 12 through the connecting rod 11. Because the valve stem 10 and the valve core 9 are movably connected, the valve core 9 moves upward, thereby forming a gap between the left gate 7 and the right gate 8 on both sides and the valve seat 3, so that the fluid can flow. By setting the left gate 7 and the right gate 8, a wedge-type double gate structure is adopted. The wedge-type double gate structure can solve the following problems that are easily caused by the wedge-type single gate structure in actual working conditions. If the valve body 1 is subjected to unexpected pressure or torque, it may cause the valve body 1 to twist, resulting in the inability to open the gate normally. However, the double gate structure can still open normally because the valve seat sealing load has been eliminated before the gate attempts to open. The contents not described in detail in this description belong to the prior art known to those skilled in the art.

[0027] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A large-diameter low-pressure bypass inlet electrically operated isolation gate valve, comprising a valve body (1), characterized in that: A valve seat (3) is provided in the middle of the valve body (1). Liners (2) are provided on the inner walls of both ends of the valve body (1). A valve cover (4) is installed on the upper end of the valve body (1). A handwheel-driven electric motor (5) is provided on the top of the valve cover (4). An automatic cleaning filter (6) is connected to the left end of the valve body (1). A left gate plate (7) is provided inside the valve seat (3). A valve core (9) is provided on the right side of the left gate plate (7). A right gate plate (8) is provided on the right side of the valve core (9). A valve stem (10) is installed on the top of the valve core (9). A support member (12) is provided inside the valve cover (4). The upper end of the valve body (1) is provided with a connecting rod (11). The upper end of the connecting rod (11) passes through the top of the valve cover (4) and is connected to the electric head (5) with handwheel. The upper end of the valve stem (10) passes through the top of the valve body (1), the bottom of the valve cover (4) and the support (12) from bottom to top and is connected to the connecting rod (11). The outlet (14) on the automatic cleaning filter (6) is connected to the left end of the valve body (1). The upper left side of the automatic cleaning filter (6) is provided with an inlet (13). The bottom of the automatic cleaning filter (6) is provided with a drain valve (15). The electric motor (16) of the automatic cleaning filter (6) is provided.

2. A large-bore low-pressure bypass inlet electrically isolated gate valve according to claim 1, characterized in that: The bottom of the connecting rod (11) is in contact with the top of the support (12), but they are not connected.

3. A large-bore low-pressure bypass inlet electrically-operated isolation gate valve according to claim 1, characterized in that: The left gate (7) and right gate (8) are arranged symmetrically about the valve core (9) on the left and right axes.

4. A large diameter low pressure bypass inlet electrically operated isolation gate valve according to claim 1, characterized in that: The left and right sides of the valve core (9) are in contact with one side of the left gate (7) and the right gate (8), respectively, but are not connected.

5. A large diameter low pressure bypass inlet electrically operated isolation gate valve according to claim 1, characterized in that: The valve stem (10) and the valve core (9) are movably connected.

6. A large diameter low pressure bypass inlet electrically operated isolation gate valve according to claim 1, characterized in that: The inner lining (2) is made of rubber.

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