Double seal interlocked control electric gate valve

Abstract

The utility model discloses a double sealing linkage control electric gate valve, aims at providing a double sealing linkage control electric gate valve with better reliability and stability, and its technical scheme main points are including the valve body that is equipped with medium passage, valve seat, gate board subassembly and the electric actuator of drive valve board subassembly lift, the valve board subassembly includes the valve board, with the valve rod of valve board upper end connection, the valve cover of setting on the valve rod and the seal cover of setting on the valve rod, be equipped with double -layer sealing structure between valve board subassembly and valve seat, double -layer sealing structure includes setting in the main seal ring of valve seat periphery and the vice seal ring that surrounds main seal ring setting, be equipped with respectively for installing first installation groove, second installation groove of main seal ring and vice seal ring on valve seat. The utility model is applicable to the valve technical field.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a double-seal linkage control electric gate valve. Background Technology

[0002] Traditional electric gate valves typically employ a single-seal structure, relying on a single sealing surface between the valve plate and seat for sealing. However, during long-term use, factors such as fluid erosion, wear, and media corrosion can easily damage the sealing surface, leading to decreased sealing performance and leakage. This is especially problematic in applications with extremely high sealing requirements, such as the chemical, food, and pharmaceutical industries, where even minor leaks can cause serious safety accidents or product quality issues. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a double-seal linkage control electric gate valve with better reliability and stability.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a double-seal linkage control electric gate valve, comprising a valve body with a medium channel, a valve seat, a gate assembly, and an electric actuator for driving the valve plate assembly to rise and fall. The valve plate assembly includes a valve plate, a valve stem connected to the upper end of the valve plate, a valve cover sleeved on the valve stem, and a sealing sleeve sleeved on the valve stem. A double-layer sealing structure is provided between the valve plate assembly and the valve seat. The double-layer sealing structure includes a main sealing ring disposed around the valve seat and a secondary sealing ring disposed around the main sealing ring. The valve seat is provided with a first mounting groove and a second mounting groove for installing the main sealing ring and the secondary sealing ring, respectively.

[0005] The present invention is further configured such that: the valve plate is also provided with an arc groove, so that when the valve plate is in the closed state, the main sealing ring can fit better in the arc groove to form a seal.

[0006] The present invention is further configured such that: the main sealing ring is mainly made of shape memory alloy material and is covered with rubber on the outside; the end of the main sealing ring is arc-shaped, so that the valve plate can smoothly enter the channel during the opening and closing process.

[0007] The present invention is further configured such that: the secondary sealing ring is made of elastic composite material and has a honeycomb structure inside; and the sealing ring also has a V-shaped elastic lip.

[0008] The present invention is further configured such that: the valve body is provided with a lubrication structure, the lubrication structure includes a chamber disposed in the upper part of the valve body, an oil outlet extending from the chamber to the valve stem movement channel, and a rotation trigger disposed at the oil outlet. When the valve stem is rotated, it drives the rotation trigger to rotate, thereby transferring the lubricating medium to the valve stem.

[0009] The present invention is further configured such that: the rotating trigger is provided with a plurality of recesses for transferring the lubricating medium.

[0010] The beneficial effects of this utility model are:

[0011] 1. The gate valve adopts a double-layer sealing structure, consisting of a main sealing ring located around the valve seat and a secondary sealing ring surrounding the main sealing ring. When the valve is closed, the main sealing ring plays the primary sealing role, effectively preventing media leakage. The secondary sealing ring acts as an additional line of defense. When the main sealing ring experiences wear, aging, or corrosion due to prolonged use, leading to a decline in sealing performance, the secondary sealing ring can promptly provide a seal, preventing further media leakage. The electric actuator drives the valve plate assembly to achieve precise lifting and lowering movements, thereby quickly and accurately controlling the opening and closing of the valve. The valve plate assembly includes the valve plate, valve stem, valve cover, and sealing sleeve, with each part having a compact structure and robust connections. The connection between the valve stem and the valve plate ensures stable lifting and lowering of the valve plate under the drive of the electric actuator. The valve cover and sealing sleeve protect and seal the valve stem, preventing media leakage and the entry of external impurities into the valve, thus extending the valve's service life. The valve seat is provided with a first mounting groove and a second mounting groove for installing the main sealing ring and the auxiliary sealing ring, respectively. These grooves allow for accurate installation in predetermined positions, ensuring a tight fit between the sealing ring and the valve plate assembly and further enhancing the sealing effect.

[0012] 2. The presence of the arc-shaped groove allows the main sealing ring to engage more smoothly with the valve plate during closure. As the valve plate descends, the main sealing ring naturally conforms to the shape of the arc-shaped groove, reducing resistance and jamming during the sealing process. This tight fit between the main sealing ring and the arc-shaped groove increases the contact area between the main sealing ring and the valve plate. A larger contact area means a larger sealing force application area, more effectively preventing media leakage. Simultaneously, it ensures a more even distribution of the sealing process across the contact surface, avoiding wear caused by excessive local pressure. The secondary sealing ring is made of elastic composite material with an internal honeycomb structure. The elastic composite material possesses excellent elasticity and deformation capacity, allowing it to elastically deform under pressure, tightly fitting the valve plate and valve seat for a good seal. The honeycomb structure further enhances the elasticity and buffering performance of the secondary sealing ring. The voids within the honeycomb structure can compress and rebound under stress, absorbing and dispersing pressure, enabling the secondary sealing ring to better adapt to different operating conditions and pressure changes. The secondary sealing ring has a V-shaped elastic lip, which can fit tightly against the valve plate and valve seat when the valve is closed, forming an additional sealing barrier. It can better adapt to changes in the shape of the sealing surface and maintain good sealing performance even when there is some unevenness or slight deformation of the sealing surface.

[0013] 3. The main sealing ring is primarily made of shape memory alloy material, with an outer rubber sleeve. Shape memory alloy possesses a unique shape memory function, allowing it to recover its preset shape under different temperature conditions. During valve operation, when encountering temperature changes, the shape memory alloy main sealing ring automatically adjusts its shape, maintaining a tight fit with the valve plate and seat to ensure excellent sealing. The outer rubber sleeve acts as a buffer and enhances the seal. The rubber's good elasticity and flexibility fill any tiny gaps that may exist between the shape memory alloy and the valve plate / seat, further improving sealing performance. The end of the main sealing ring is arc-shaped. When the valve plate opens or closes, the arc-shaped end allows the main sealing ring to smoothly enter the channel, avoiding problems such as jamming or collision that may occur due to sharp or irregular ends. This not only ensures the flexibility and convenience of valve operation but also reduces damage to the main sealing ring and valve plate, extending the service life of all valve components.

[0014] 4. The lubrication structure effectively reduces wear on the valve stem and related components. Due to the lubricating effect of the lubricating medium, friction and wear between the valve stem and components such as the valve seat and valve cover are significantly reduced, significantly extending the service life of the valve stem and other related components, reducing the frequency and cost of component replacement, and improving the economy and reliability of the valve. The lubrication structure inside the valve body can promptly transfer the lubricating medium to the valve stem during operation. When the valve stem rotates, driving the rotating trigger, the rotating trigger delivers the lubricating medium in the chamber to the valve stem movement channel. The lubricating medium forms a lubricating film on the valve stem surface, greatly reducing the friction between the valve stem and surrounding components. Several cavities on the rotating trigger serve to transfer the lubricating medium. During valve stem operation, the lubricating medium stored in the cavities can continuously provide lubrication to the valve stem. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a magnified view of point A;

[0018] Figure 4 This is a magnified view of point B;

[0019] Figure 1-4 Reference numerals: 1. Valve body; 2. Valve seat; 3. Electric actuator; 4. Valve plate; 5. Valve stem; 6. Valve cover; 7. Main sealing ring; 8. Secondary sealing ring; 9. Circular groove; 10. Chamber; 11. Rotation trigger; 12. Cavity. Detailed Implementation

[0020] Reference Figures 1 to 4 The embodiments of this utility model will be further described below.

[0021] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0022] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0023] Figures 1 to 4 The illustrated electric gate valve with dual-seal linkage control includes a valve body 1 with a medium passage, a valve seat 2, a gate assembly, and an electric actuator 3 that drives the valve assembly to rise and fall. The electric actuator 3 can drive the valve assembly to achieve precise rising and falling movements, thereby quickly and accurately controlling the opening and closing of the valve. The valve assembly includes a valve plate 4, a valve stem 5 connected to the upper end of the valve plate 4, a valve cover 6 sleeved on the valve stem 5, and a sealing sleeve sleeved on the valve stem 5. The components are compactly structured and firmly connected. The connection between the valve stem 5 and the valve plate 4 ensures that the valve plate 4 can rise and fall stably under the drive of the electric actuator 3. The valve cover 6 and the sealing sleeve protect and seal the valve stem 5, preventing medium leakage and external impurities from entering the valve, thus extending the valve's service life. A dual-layer sealing structure is provided between the valve assembly and the valve seat 2. The dual-layer sealing structure includes a main sealing ring 7 disposed around the valve seat 2 and a secondary sealing ring 8 disposed around the main sealing ring 7. When the valve is closed, the main sealing ring 7 first plays the main sealing role, effectively preventing medium leakage. The secondary sealing ring 8 serves as an additional line of defense. When the main sealing ring 7 experiences wear, aging, or corrosion from the medium due to long-term use, resulting in a decrease in sealing performance, the secondary sealing ring 8 can promptly provide a seal to prevent further leakage of the medium. The valve seat 2 is provided with a first mounting groove and a second mounting groove for installing the main sealing ring 7 and the secondary sealing ring 8, respectively. These grooves allow for accurate installation in predetermined positions, ensuring a tight fit between the sealing rings and the valve plate assembly, and further enhancing the sealing effect.

[0024] The valve plate 4 is also provided with an arc-shaped groove 9, which allows the main sealing ring 7 to cooperate more smoothly with the valve plate 4 during the closing process. When the valve plate 4 descends, the main sealing ring 7 can naturally fit along the shape of the arc-shaped groove 9, reducing resistance and jamming during the sealing process. The tight fit between the main sealing ring 7 and the arc-shaped groove 9 increases the contact area between the main sealing ring 7 and the valve plate 4. A larger contact area means a larger sealing force application area, which can more effectively prevent media leakage. At the same time, it makes the sealing process more evenly distributed on the contact surface, avoiding wear caused by excessive local pressure.

[0025] The main sealing ring 7 is primarily made of shape memory alloy material and is covered with rubber. Shape memory alloy has a unique shape memory function, allowing it to recover its preset shape under different temperature conditions. During valve operation, when encountering temperature changes, the shape memory alloy main sealing ring 7 can automatically adjust its shape, always maintaining a tight fit with the valve plate 4 and valve seat 2, ensuring a good sealing effect. The external rubber acts as a buffer and enhances the seal. The rubber has good elasticity and flexibility, filling any small gaps that may exist between the shape memory alloy and the valve plate 4 and valve seat 2, further improving sealing performance. The end of the main sealing ring 7 is arc-shaped. When the valve plate 4 is opened or closed, the arc-shaped end allows the main sealing ring 7 to smoothly enter the channel, avoiding problems such as jamming or collision that may occur due to sharp or irregular ends. This not only ensures the flexibility and convenience of valve operation but also reduces damage to the main sealing ring 7 and valve plate 4, extending the service life of all valve components.

[0026] The secondary sealing ring 8 is made of elastic composite material with an internal honeycomb structure. The elastic composite material has excellent elasticity and deformation capacity, allowing it to elastically deform under pressure and tightly fit the valve plate 4 and valve seat 2, achieving a good seal. The honeycomb structure further enhances the elasticity and buffering performance of the secondary sealing ring 8. The gaps inside the honeycomb structure can compress and rebound under stress, absorbing and dispersing pressure, allowing the secondary sealing ring 8 to better adapt to different operating conditions and pressure changes. The secondary sealing ring 8 has a V-shaped elastic lip, which can tightly fit the valve plate 4 and valve seat 2 when the valve is closed, forming an additional sealing barrier. This better adapts to changes in the shape of the sealing surface, maintaining good sealing performance even when the sealing surface has some unevenness or slight deformation.

[0027] The valve body 1 is equipped with a lubrication structure, which effectively reduces the wear of the valve stem 5 and related components. Due to the lubrication effect of the lubricating medium, the friction and wear between the valve stem 5 and components such as the valve seat 2 and valve cover 6 are greatly reduced, significantly extending the service life of the valve stem 5 and other related components, reducing the frequency and cost of replacing parts, and improving the economy and reliability of the valve. The lubrication structure can promptly transfer the lubricating medium to the valve stem 5 when it is in operation. The lubrication structure includes a chamber 10 located in the upper part of the valve body 1, an oil outlet extending from the chamber 10 to the movement channel of the valve stem 5, and a rotation trigger 11 located at the oil outlet. When the valve stem 5 moves and drives the rotation trigger 11 to move, the rotation trigger 11 will transport the lubricating medium in the chamber 10 to the movement channel of the valve stem 5. The lubricating medium forms a lubricating film on the surface of the valve stem 5, which greatly reduces the friction between the valve stem 5 and surrounding components.

[0028] The rotating trigger 11 is provided with a plurality of recesses 12. The plurality of recesses 12 provided on the rotating trigger 11 serve to transfer the lubricating medium. During the operation of the valve stem 5, the lubricating medium stored in the recesses 12 can continuously provide lubrication to the valve stem 5.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-seal linkage control electric gate valve, comprising a valve body (1) with a medium passage, a valve seat (2), a gate assembly, and an electric actuator (3) for driving the valve plate assembly to rise and fall, characterized in that, The valve plate assembly includes a valve plate (4), a valve stem (5) connected to the upper end of the valve plate (4), a valve cover (6) sleeved on the valve stem (5), and a sealing sleeve sleeved on the valve stem (5). A double-layer sealing structure is provided between the valve plate assembly and the valve seat (2). The double-layer sealing structure includes a main sealing ring (7) disposed on the periphery of the valve seat (2) and a secondary sealing ring (8) disposed around the main sealing ring (7). The valve seat (2) is provided with a first mounting groove and a second mounting groove for installing the main sealing ring (7) and the secondary sealing ring (8), respectively.

2. The double-seal linkage control electric gate valve according to claim 1, characterized in that, The valve plate (4) is also provided with an arc groove (9). When the valve plate (4) is in the closed state, the main sealing ring (7) can fit better in the arc groove (9) to form a seal.

3. The double-seal linkage control electric gate valve according to claim 1, characterized in that, The main sealing ring (7) is mainly made of shape memory alloy material and is covered with rubber. The end of the main sealing ring (7) is arc-shaped, so that the valve plate (4) can smoothly enter the channel during the opening and closing process.

4. The double-seal linkage control electric gate valve according to claim 1, characterized in that, The secondary sealing ring (8) is made of elastic composite material and has a honeycomb structure inside. The sealing ring also has a V-shaped elastic lip.

5. The double-seal linkage control electric gate valve according to claim 1, characterized in that, The valve body (1) is provided with a lubrication structure, which includes a chamber (10) located on the upper part of the valve body (1), an oil outlet extending from the chamber (10) to the movement channel of the valve stem (5), and a rotation trigger (11) located at the oil outlet. When the valve stem (5) is in motion, it drives the rotation trigger (11) to rotate and transfer the lubricating medium to the valve stem (5).

6. The double-seal linkage control electric gate valve according to claim 5, characterized in that, The rotation trigger (11) is provided with several cavities (12) for transferring the lubricating medium.

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