Self-sealing gate valve

Abstract

The utility model relates to the technical field of valves, and discloses a self-sealing gate valve which comprises a valve body, a valve cover, a support and an electric device which are arranged from bottom to top. The valve cover, the support and the electric device are arranged on the top of the valve body. A valve seat and a flashboard are arranged in the valve body, a valve rod is arranged between the electric device and the flashboard, and the valve rod is connected with the flashboard and the electric device. Sealing packing is arranged at the joint of the valve deck and the valve rod, a packing pressing sleeve is arranged at the top of the sealing packing, and a packing pressing plate is arranged at the top of the packing pressing sleeve. A valve rod nut is arranged on the inner side of the top of the support, an upper bearing and a lower bearing are arranged at the joint of the valve rod nut and the support, a bearing gland is arranged on the top of the upper bearing, and a set screw is arranged on the bearing gland. The self-sealing gate valve has the advantages of being simple in structure, reliable in sealing, long in service life and the like.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a self-sealing gate valve. Background Technology

[0002] Gate valves, as a common valve type, are widely used in industrial production and fluid control systems for controlling the on / off switching of various pipeline media. However, traditional gate valves have some shortcomings. For example, sealing performance is difficult to guarantee, especially under complex conditions such as high pressure and high temperature, leading to leakage problems. This not only wastes the media but also poses potential risks to the environment and production safety. Furthermore, gate valves are mostly operated manually or through simple mechanical transmission, which is laborious and inefficient in large pipeline systems or applications requiring frequent operation. At the same time, the traditional gate valve structure suffers from high maintenance and replacement costs due to wear and aging of components over long-term use, affecting the normal operation and maintenance management of equipment. Therefore, developing a self-sealing gate valve with better sealing performance, convenient operation, and easy maintenance is of significant practical importance. Utility Model Content

[0003] The purpose of this invention is to provide a self-sealing gate valve to solve the above-mentioned problems.

[0004] This utility model provides a self-sealing gate valve, comprising: a valve body, a valve cover, a bracket, and an electric actuator arranged from bottom to top;

[0005] The valve cover is disposed on the top of the valve body, the bracket is disposed on the top of the valve body, and the electric device is disposed on the top of the bracket;

[0006] The valve body is provided with a valve seat and a gate, the gate and the valve seat cooperate with each other, and a valve stem is provided between the electric device and the gate, the bottom end of the valve stem is connected to the gate, and the top end of the valve stem is connected to the electric device;

[0007] A sealing packing is provided at the connection between the valve cover and the valve stem, and a packing sleeve is provided at the top of the sealing packing, and a packing pressure plate is provided at the top of the packing sleeve;

[0008] A jack is provided on the outer side of the top of the valve cover, and the jack is connected to the packing pressure plate by a hinge bolt;

[0009] A valve stem nut is provided on the inner side of the top of the bracket. The valve stem nut is sleeved on the valve stem. An upper bearing and a lower bearing are provided at the connection between the valve stem nut and the bracket. A bearing cap is provided on the top of the upper bearing, and a set screw is provided on the bearing cap.

[0010] Preferably, a wedge-shaped sealing ring is provided at the connection between the valve body and the valve cover.

[0011] Preferably, a four-ring is provided between the valve cover and the valve body, and the four-ring is located on top of the wedge-shaped sealing ring. A pressure plate is provided on top of the four-ring, and the pressure plate is connected to the valve cover by bolts.

[0012] Preferably, the bottom of the bracket is connected to the top of the valve body by bolts, and the top of the bracket is connected to the electric device by bolts.

[0013] Preferably, the jack is further provided with a cylindrical pin, which passes through the hinge bolt.

[0014] Preferably, an oil cup is provided on the side of the bracket, and the oil cup is connected to the bracket and the valve stem bolt connection.

[0015] Preferably, the valve seat is inclined.

[0016] Preferably, the packing sleeve and packing plate are sleeved on the valve stem.

[0017] Compared with existing technologies, the advantages of this invention lie in its multi-layered sealing structure formed by installing sealing packing at the connection between the valve cover and the valve stem, and by setting a packing sleeve and a packing pressure plate on top of the sealing packing, effectively preventing media leakage. Even under harsh conditions such as high pressure and high temperature, it can ensure a good sealing effect, guaranteeing the safe and stable operation of the pipeline system. The jack is connected to the packing pressure plate via hinged bolts, allowing for adjustment according to actual needs, further ensuring the tightness of the sealing packing and improving the reliability of the seal.

[0018] The electric actuator makes gate valve operation more convenient and automated. Users can raise and lower the gate simply by controlling the electric actuator, eliminating the need for manual operation, greatly reducing the labor intensity of operators and improving work efficiency. The electric actuator has precise control functions, which can accurately control the position of the gate according to actual needs, achieving precise regulation of the medium flow rate and meeting the requirements of different production processes.

[0019] The upper and lower bearings at the connection between the valve stem nut and the bracket, along with the set screws on the bearing caps, ensure smoother valve stem movement during lifting and lowering, reducing friction and wear between components and extending the gate valve's service life. This structural design makes the connections between components more rational, facilitating disassembly and assembly. When maintenance or component replacement is required, it allows for quick operation, reducing maintenance costs and downtime, and improving equipment availability.

[0020] The self-sealing gate valve, composed of a valve body, valve cover, support, and electric actuator, features a rationally designed structure with tight interlocking components, resulting in high structural strength and stability. It can withstand significant pressure and impact in complex working environments, ensuring normal operation. The valve stem's top connects to the electric actuator, while the bottom connects to the gate. The valve stem nut, fitted onto the stem, ensures smoother and more accurate gate movement, preventing sealing failures and component damage caused by gate wobbling or misalignment, further enhancing the valve's reliability and safety. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a structural schematic diagram of a self-sealing gate valve according to the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the bracket of this utility model;

[0024] Figure 3 This is a structural schematic diagram of the jack frame of this utility model.

[0025] The components are as follows: 1. Valve body; 2. Valve cover; 3. Bracket; 4. Electric actuator; 5. Valve seat; 6. Gate; 7. Valve stem; 8. Sealing packing; 9. Packing sleeve; 10. Packing pressure plate; 11. Jack; 12. Hinged bolt; 13. Valve stem nut; 14. Upper bearing; 15. Lower bearing; 16. Bearing cover; 17. Set screw; 18. Wedge seal ring; 19. Four-ring seal; 20. Pressure plate; 21. Cylindrical pin; 22. Oil cup. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] like Figures 1-3 As shown, this utility model provides a self-sealing gate valve, comprising: a valve body 1, a valve cover 2, a bracket 3, and an electric actuator 4 arranged from bottom to top.

[0031] A valve cover 2 is located on top of a valve body 1, a bracket 3 is located on top of a valve body 1, and an electric actuator 4 is located on top of a bracket 3. A valve seat 5 and a gate 6 are located inside the valve body 1. The gate 6 and valve seat 5 cooperate with each other. A valve stem 7 is located between the electric actuator 4 and the gate 6. The bottom end of the valve stem 7 is connected to the gate 6, and the top end of the valve stem 7 is connected to the electric actuator 4. A sealing packing 8 is located at the connection between the valve cover 2 and the valve stem 7. A packing sleeve 9 is located on top of the sealing packing 8, and a packing pressure plate 10 is located on top of the packing sleeve 9. A jack 11 is located on the outer side of the top of the valve cover 2. The jack 11 is connected to the packing pressure plate 10 via a hinge bolt 12. A valve stem nut 13 is located on the inner side of the top of the bracket 3. The valve stem nut 13 is fitted onto the valve stem 7. An upper bearing 14 and a lower bearing 15 are located at the connection between the valve stem nut 13 and the bracket 3. A bearing cap 16 is located on top of the upper bearing 14, and a set screw 17 is located on the bearing cap 16.

[0032] This invention uses an electric device 4 to drive the valve stem 7 to rotate. When the valve stem 7 rotates, it causes the gate plate 6 to move up and down within the valve seat 5, thus opening and closing the valve. In the closed state, the gate plate 6 and the valve seat 5 are tightly fitted together, forming a reliable seal. Simultaneously, the design of the sealing packing 8, packing sleeve 9, and packing pressure plate 10 effectively prevents media leakage from the valve stem 7, improving the valve's sealing performance. Furthermore, the jack 11 is connected to the packing pressure plate 10 via a hinge bolt 12, facilitating adjustment of the packing pressure plate 10's tightness, thereby adjusting the clamping force of the sealing packing 8 and ensuring a good seal. The upper bearing 14 and lower bearing 15 reduce the frictional resistance during valve stem 7 rotation, improving the valve's stability and service life.

[0033] In some embodiments of this application, a wedge-shaped sealing ring 18 is provided at the connection between the valve body 1 and the valve cover 2.

[0034] The wedge-shaped sealing ring 18 enhances the sealing performance at the connection between the valve body 1 and the valve cover 2. The wedge-shaped sealing ring 18 can tightly fit the contact surfaces of the valve body 1 and the valve cover 2, effectively preventing media leakage from the connection and improving the overall sealing performance and reliability of the valve. Furthermore, the wedge-shaped sealing ring 18 also has a certain degree of elasticity, allowing it to adapt to minor deformations of the valve body 1 and the valve cover 2 caused by factors such as temperature and pressure, thereby maintaining a long-term sealing effect.

[0035] In some embodiments of this application, a four-ring 19 is provided between the valve cover 2 and the valve body 1, and the four-ring 19 is located on the top of the wedge-shaped sealing ring 18. A pressure plate 20 is provided on the top of the four-ring 19, and the pressure plate 20 is connected to the valve cover 2 by bolts.

[0036] The four-ring seal 19 enhances the connection stability between the valve cover 2 and the valve body 1. Furthermore, the combined use of the four-ring seal 19 and the wedge-shaped sealing ring 18 further improves the valve's sealing performance. The pressure plate 20, located on top of the four-ring seal 19, is tightly connected to the valve cover 2 by bolts, not only fixing the position of the four-ring seal 19 but also enhancing the overall stability of the valve structure. This multi-seal design ensures the stability and reliability of the valve under various operating conditions.

[0037] In some embodiments of this application, the bottom of the bracket 3 is connected to the top of the valve body 1 by bolts, and the top of the bracket 3 is connected to the electric device 4 by bolts.

[0038] The bracket 3 serves as a bridge connecting the valve body 1 and the electric actuator 4, ensuring not only the stability of the structure but also facilitating the precise control of the valve by the electric actuator 4.

[0039] In some embodiments of this application, the jack 11 is also provided with a cylindrical pin 21, which passes through the hinge bolt 12.

[0040] The cylindrical pin 21 further enhances the connection stability between the jack 11 and the hinge bolt 12. In practical applications, the cylindrical pin 21, as a mechanical connector, possesses excellent shear resistance and positioning accuracy. When the jack 11 is under stress, the cylindrical pin 21 effectively prevents relative displacement or loosening of the hinge bolt 12, thereby ensuring the stability of the valve. Furthermore, the through-hole design of the cylindrical pin 21 simplifies the installation process, improves assembly efficiency, and also facilitates subsequent inspection and maintenance.

[0041] In some embodiments of this application, an oil cup 22 is provided on the side of the bracket 3, and the oil cup 22 is connected to the bolt connection between the bracket 3 and the valve stem 7.

[0042] The oil cup 22 provides effective lubrication to the bolt connection of the valve stem 7, reducing friction between components and further improving the valve's operational flexibility and service life. Regularly injecting lubricant into the connection through the oil cup 22 ensures smooth valve operation during opening and closing, reducing wear and noise caused by friction.

[0043] In some embodiments of this application, the valve seat 5 is inclined.

[0044] In some embodiments of this application, the packing sleeve 9 and the packing plate 10 are sleeved on the valve stem 7.

[0045] The inclined design of the valve seat 5 effectively enhances the sealing performance between the valve seat 5 and the gate stem, reducing the possibility of media leakage. This design not only improves the sealing effect of the self-sealing gate valve but also ensures stable operation of the valve under high pressure or high temperature conditions. At the same time, the inclined valve seat 5 also facilitates the smooth flow of the medium within the valve body 1, reduces flow resistance, and improves the valve's flow capacity.

[0046] The design of the packing sleeve 9 and packing plate 10 being fitted onto the valve stem 7 provides reliable sealing and support for the valve stem 7. This structure not only prevents media leakage from the valve stem 7, but also ensures the stability of the valve stem 7 during the opening and closing process.

[0047] The workflow of this application is as follows: When the gate valve needs to be opened, the power supply to the electric actuator is turned on. An opening command is sent to the electric actuator via its control unit (such as a remote control, operating buttons or knobs on the control cabinet, etc.). Upon receiving the command, the electric actuator begins to drive the valve stem upwards. The valve stem drives the gate to gradually rise, creating a channel between the gate and the valve seat, allowing the medium to flow. If the electric actuator malfunctions or manual operation of the gate valve is required under certain special circumstances, a free-hand wrench or similar tool can be used for operation.

[0048] When it is necessary to close the gate valve, the control unit of the electric actuator sends a closing command to the electric actuator. The electric actuator then drives the valve stem to move downward. The valve stem drives the gate to gradually descend until the gate is tightly fitted with the valve seat, closing the passage and preventing the flow of media.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the 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 still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A self-sealing gate valve, characterized in that, include: The valve body, valve cover, bracket, and electric actuator are arranged from bottom to top; The valve cover is disposed on the top of the valve body, the bracket is disposed on the top of the valve body, and the electric device is disposed on the top of the bracket; The valve body is provided with a valve seat and a gate, the gate and the valve seat cooperate with each other, and a valve stem is provided between the electric device and the gate, the bottom end of the valve stem is connected to the gate, and the top end of the valve stem is connected to the electric device; A sealing packing is provided at the connection between the valve cover and the valve stem, and a packing sleeve is provided at the top of the sealing packing, and a packing pressure plate is provided at the top of the packing sleeve; A jack is provided on the outer side of the top of the valve cover, and the jack is connected to the packing pressure plate by a hinge bolt; A valve stem nut is provided on the inner side of the top of the bracket. The valve stem nut is sleeved on the valve stem. An upper bearing and a lower bearing are provided at the connection between the valve stem nut and the bracket. A bearing cap is provided on the top of the upper bearing, and a set screw is provided on the bearing cap.

2. The self-sealing gate valve according to claim 1, characterized in that, A wedge-shaped sealing ring is provided at the connection between the valve body and the valve cover.

3. The self-sealing gate valve according to claim 2, characterized in that, A four-ring structure is provided between the valve cover and the valve body, and the four-ring structure is located on top of the wedge-shaped sealing ring. A pressure plate is provided on top of the four-ring structure, and the pressure plate is connected to the valve cover by bolts.

4. The self-sealing gate valve according to claim 1, characterized in that, The bottom of the bracket is connected to the top of the valve body by bolts, and the top of the bracket is connected to the electric device by bolts.

5. The self-sealing gate valve according to claim 1, characterized in that, The jack is also equipped with a cylindrical pin, which passes through the hinge bolt.

6. The self-sealing gate valve according to claim 1, characterized in that, An oil cup is provided on the side of the bracket, and the oil cup is connected to the bracket and the valve stem bolt connection.

7. The self-sealing gate valve according to claim 1, characterized in that, The valve seat is inclined.

8. The self-sealing gate valve according to claim 1, characterized in that, The packing sleeve and packing plate are fitted onto the valve stem.

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