High temperature stop valve

Abstract

The utility model relates to valve structure technical field discloses a high temperature stop valve, including valve rod, the bottom fixed connection of valve rod has lubricating mechanism, the bottom fixed connection of lubricating mechanism has valve body, one side fixed connection of valve body has quick detach mechanism, the lubricating mechanism includes support, the bottom fixed connection of support is in the top of valve body, the bottom installation of support has pneumatic cylinder, the drive end fixed connection of pneumatic cylinder has connecting plate, the top sliding connection of connecting plate has hinged shaft, the rear end rotation is connected with rotating shaft of hinged shaft, the other end fixed connection of rotating shaft has open plate, the bottom fixed connection of open plate has sliding assembly. In the utility model, through quick detach mechanism structure drive joint pipe and connecting pipe butt joint structure work, valve body and external pipeline quick and close connection, avoid fluid leakage effect, realize quick loading and unloading and the dual effect of leak protection.

Description

Technical Field

[0001] This utility model relates to the field of valve structure technology, and in particular to a high-temperature shut-off valve. Background Technology

[0002] The closing element of the high-temperature gate valve moves along the center line of the valve seat. The change in the valve seat opening is directly proportional to the valve disc stroke. The valve stem opening or closing stroke is relatively short, providing a reliable shut-off function. It can achieve the shut-off, regulation, and throttling control of the medium. The structure is simpler than that of a gate valve, making manufacturing and maintenance more convenient. Usually, there is only one sealing surface on the valve body and valve disc, which is easy to process and maintain. The sealing surface is not easily worn or scratched, resulting in good sealing performance. There is no relative sliding between the valve disc and the valve body sealing surface during opening and closing, so wear and scratches are not serious, resulting in a long service life and a smaller height. During opening and closing, the valve disc stroke is small, and the height of the gate valve is smaller than that of the gate valve, but the structural length is longer than that of the gate valve. High-temperature gate valves mainly consist of a valve body, valve cover, gate, valve stem, sealing device, and transmission device. The valve body and valve cover are generally made of high-temperature resistant cast steel, stainless steel, or chromium-molybdenum steel to withstand high temperature and high pressure. The gate has various shapes, commonly including parallel and wedge types. Its sealing surface mates with the valve seat to achieve the function of cutting off the medium. The valve stem is used to connect the gate and the transmission device, transmitting the opening and closing force. The sealing device includes the seal between the valve body and the valve cover, as well as the seal between the gate and the valve seat. High-temperature resistant sealing materials such as graphite and metal spiral wound gaskets are usually used. The transmission device can be manual, electric, or pneumatic to meet different operating requirements. It has low medium flow resistance and is suitable for large-diameter high-temperature pipelines with minimal impact on flow rate. It is often used in conjunction with high-temperature gate valves and plays a role in some situations where complete cut-off of the medium and large flow rate are required. The structural design of the lubrication mechanism has significant shortcomings in actual operation. The rotating connection between the rotating shaft and the hinge shaft lacks a positioning and locking structure. After the opening plate completes its opening and closing action, the rotating shaft is prone to reverse rotation due to external vibrations, causing the opening plate to spring back and resulting in unexpected changes in the opening degree of the lubrication channel, affecting the stability of lubrication supply. Although the sliding component can reduce the frictional resistance when the opening plate slides, the fixed connection method between the sliding component and the opening plate does not consider the effect of thermal expansion under high temperature conditions. Under long-term high-temperature conditions, the connection gap between the sliding component and the opening plate will change due to thermal expansion and contraction, causing the sliding resistance to fluctuate, which cannot guarantee the continuous and stable operation of the opening plate and reduces the working efficiency of the lubrication mechanism. Therefore, a high-temperature shut-off valve is proposed to solve the above problems. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a high-temperature shut-off valve, which aims to improve the problems of unstable lubrication channel opening and lubrication dosage supply deviation in the lubrication mechanism of the existing high-temperature shut-off valve, as well as the difficulty in achieving rapid and tight connection between the valve body and the external pipeline, which easily leads to fluid leakage.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a high-temperature shut-off valve, comprising a valve stem, a lubrication mechanism fixedly connected to the bottom of the valve stem, a valve body fixedly connected to the bottom of the lubrication mechanism, and a quick disassembly mechanism fixedly connected to one side of the valve body; The lubrication mechanism includes a bracket, the bottom of which is fixedly connected to the top of the valve body. A pneumatic cylinder is installed at the bottom of the bracket. A connecting plate is fixedly connected to the driving end of the pneumatic cylinder. A hinge shaft is slidably connected to the top of the connecting plate. A rotating shaft is rotatably connected to the rear end of the hinge shaft. An opening plate is fixedly connected to the other end of the rotating shaft. A sliding assembly is fixedly connected to the bottom of the opening plate. As a further description of the above technical solution: The quick disassembly mechanism includes a connecting pipe, one side of which is fixedly connected to one side of the valve body. A fixing seat is fixedly connected to the inner wall of the connecting pipe. A spring is fixedly connected to the front end of the fixing seat. An interface piece is fixedly connected to the other end of the spring. A spring is fixedly connected to the front end of the interface piece. A limit ring is slidably connected to the front end of the spring. A steel ball is slidably connected to the front end of the limit ring. A connector pipe is slidably connected to the bottom of the steel ball. As a further description of the above technical solution: The sliding assembly includes a housing, the inner wall of which is slidably connected to the outer wall of the valve stem, a plurality of balls are slidably connected to the inner wall of the housing, and bolts are slidably connected to the outside of the balls; As a further description of the above technical solution: The outer wall of the connector tube is slidably connected to the inner wall of the connecting tube, and the inner side of the limiting ring is slidably connected to the outer wall of the connector tube. As a further description of the above technical solution: The top of the steel ball is slidably connected to the inner wall of the connecting tube, and the bottom of the steel ball is slidably connected to the outer wall of the connector tube. As a further description of the above technical solution: The inner wall of the second spring is slidably connected to the outer wall of the connector tube, and the outer wall of the second spring is slidably connected to the inner wall of the connecting tube. As a further description of the above technical solution: The bottom of the hinge shaft is slidably connected to the surface groove of the connecting plate, and the top of the hinge shaft is rotatably connected to the front end of the rotating shaft. As a further description of the above technical solution: The outer side of the bracket is fixedly connected to the outer wall of the housing, and the outer side of the rotating shaft is rotatably connected to the top of the housing.

[0005] This utility model has the following beneficial effects: 1. In this utility model, the quick disassembly mechanism drives the docking structure of the connector pipe and the connecting pipe to work, thereby realizing a quick and tight connection between the valve body and the external pipeline, avoiding fluid leakage. When the connector pipe is inserted into the connecting pipe, the steel ball is displaced under the compression of the connector pipe. The limiting ring slides forward under the elastic force of the second spring and constrains the steel ball, making the steel ball clamp the connector pipe. At the same time, the interface piece is tightly fitted with the connector pipe under the elastic support of the first spring. The combination of multiple structures ensures the stability and sealing of the connection, achieving the dual effects of quick installation and removal and leakage prevention.

[0006] 2. In this utility model, with the cooperation of the lubrication mechanism structure, the lubrication dosage supply is made precise and controllable, so as to solve the problems of unstable lubrication channel opening and supply deviation in the existing lubrication mechanism. The pneumatic cylinder drives the connecting plate to drive the hinge shaft to slide. The hinge shaft converts the sliding action into the opening and closing action of the opening plate through the rotating shaft. The sliding component reduces the action resistance. All structures work together to ensure that the opening plate moves stably according to the preset trajectory, accurately adjusts the opening range of the lubrication channel, and ensures the stability and accuracy of lubrication supply. Attached Figure Description

[0007] Figure 1 This is a three-dimensional schematic diagram of a high-temperature shut-off valve proposed in this utility model; Figure 2 This is a schematic diagram of the valve body structure of a high-temperature shut-off valve proposed in this utility model. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the shell structure of a high-temperature shut-off valve proposed in this utility model; Figure 5 This is a schematic diagram of the connecting pipe of a high-temperature shut-off valve proposed in this utility model.

[0008] Legend: 1. Valve stem; 2. Lubrication mechanism; 21. Bracket; 22. Pneumatic cylinder; 23. Connecting plate; 24. Hinge shaft; 25. Rotating shaft; 26. Opening plate; 27. Sliding assembly; 271. Housing; 272. Ball bearing; 273. Bolt; 3. Valve body; 4. Quick disassembly mechanism; 41. Connecting pipe; 42. Fixing seat; 43. Spring 1; 44. Interface piece; 45. Spring 2; 46. Limiting ring; 47. Steel ball; 48. Connecting pipe. Detailed Implementation

[0009] 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.

[0010] Reference Figures 1 to 3 This utility model provides an embodiment of a high-temperature shut-off valve, including a valve stem 1. The valve stem 1 serves as the core transmission component for valve opening and closing, and can drive internal components to complete the valve opening and closing operation through rotation or lifting. A lubrication mechanism 2 is fixedly connected to the bottom of the valve stem 1. This mechanism can continuously provide lubrication to the connection between the valve stem 1 and the valve body 3, effectively reducing frictional loss between components and ensuring that the valve stem 1 moves flexibly and smoothly. The bottom of the lubrication mechanism 2 is fixedly connected to the valve body 3, which serves as the main structure of the valve. It can withstand the pressure of the high-temperature medium and form a channel for medium flow, while providing stable installation support for internal components. A quick-release mechanism 4 is fixedly connected to one side of the valve body 3. This mechanism can achieve a tight connection between the valve body 3 and the external pipeline, ensuring that the high-temperature medium will not leak during transportation and maintaining the sealing performance of the pipeline system.

[0011] The lubrication mechanism 2 includes a bracket 21, which provides a stable support foundation for the overall structure of the lubrication mechanism 2, ensuring that the components will not be displaced due to vibration or pressure during operation. The bottom of the bracket 21 is fixedly connected to the top of the valve body 3. This connection method makes the lubrication mechanism 2 and the valve body 3 form an integral whole, enhancing the stability of the valve structure. A pneumatic cylinder 22 is installed at the bottom of the bracket 21. As a power output component, it can generate thrust through pneumatic drive. The drive end of the pneumatic cylinder 22 is fixedly connected to a connecting plate 23, which can transmit the driving force of the pneumatic cylinder 22 to subsequent components, realizing effective force transmission. A hinge shaft 24 is slidably connected to the top of the connecting plate 23. This connection method allows the hinge shaft 24 to slide on the connecting plate 23, while providing a fulcrum for the rotation between components, ensuring the flexibility of movement.

[0012] The rear end of the hinge shaft 24 is rotatably connected to a rotating shaft 25, which can rotate around the hinge shaft 24 to convert sliding motion into rotational motion, thereby realizing the conversion of power transmission direction. The other end of the rotating shaft 25 is fixedly connected to an opening plate 26, which opens and closes under the drive of the rotating shaft 25, thereby controlling the opening and closing of the lubrication channel and adjusting the supply of lubricant. The bottom of the opening plate 26 is fixedly connected to a sliding component 27, which can reduce frictional resistance during sliding, ensure smooth and stable operation, and improve the working efficiency of the lubrication mechanism 2.

[0013] Reference Figure 1 , Figure 4 and Figure 5 The quick disassembly mechanism 4 includes a connecting pipe 41, which enables stable communication between the valve body 3 and the external pipeline, ensuring that the fluid flows in the valve body 3 along a predetermined path. One side of the connecting pipe 41 is fixedly connected to one side of the valve body 3. This fixed connection ensures the sealing between the connecting pipe 41 and the valve body 3, preventing fluid leakage at the connection point. A fixing seat 42 is fixedly connected to the inner wall of the connecting pipe 41. The fixing seat 42 provides a stable mounting base for subsequent components such as springs, enabling the relevant components to function in preset positions. A spring 43 is fixedly connected to the front end of the fixing seat 42. The spring 43 has elastic reset capability and can push the interface piece 44 back to its initial position after being subjected to external force. The other end of the spring 43 is fixedly connected to the interface piece 44. The interface piece 44 can move to a certain extent under the action of the spring 43, thereby accommodating the insertion and connection of the connector pipe 48.

[0014] A second spring 45 is fixedly connected to the front end of the interface component 44. The second spring 45 provides elastic support for the limiting ring 46 and assists the limiting ring 46 in limiting the steel ball 47. The front end of the second spring 45 is slidably connected to the limiting ring 46. The limiting ring 46 can slide back and forth under the action of the second spring 45, thereby adjusting the degree of constraint on the steel ball 47. The front end of the limiting ring 46 is slidably connected to the steel ball 47. Under the constraint of the limiting ring 46, the steel ball 47 can be displaced when the connector tube 48 is inserted, thereby achieving the clamping and fixing of the connector tube 48. The bottom of the steel ball 47 is slidably connected to the connector tube 48. After the connector tube 48 is inserted, it cooperates with the steel ball 47. Under the joint action of the spring and other components, a tight connection with the connecting tube 41 is achieved, ensuring smooth fluid passage.

[0015] Reference Figure 1 , Figure 3 and Figure 5The sliding assembly 27 includes a housing 271, which serves as the mounting base for the sliding assembly 27 and provides a stable space for the internal components. The inner wall of the housing 271 is slidably connected to the outer wall of the valve stem 1. This slidable connection allows the valve stem 1 to move smoothly within the housing 271, ensuring that the valve stem 1's movement is unimpeded. Multiple balls 272 are slidably connected to the inner wall of the housing 271. The balls 272 reduce friction between the housing 271 and related components, making relative movement more flexible. Bolts 273 are slidably connected to the outer side of the balls 272. The sliding fit between the bolts 273 and the balls 272 allows for fixing the components without affecting the rolling function of the balls 272. The outer wall of the connector tube 48 is slidably connected to the inner wall of the connecting tube 41. This sliding fit facilitates the insertion of the connector tube 48 into the connecting tube 41, enabling rapid docking between the two. The inner side of the limiting ring 46 is slidably connected to the outer wall of the connector tube 48. The limiting ring 46 can slide along the outer wall of the connector tube 48, thereby adjusting the limiting state of the steel ball 47.

[0016] The top of the steel ball 47 is slidably connected to the inner wall of the connecting tube 41, providing space for it to clamp the connector tube 48. The bottom of the steel ball 47 is slidably connected to the outer wall of the connector tube 48. The sliding fit between the steel ball 47 and the outer wall of the connector tube 48 allows for corresponding position adjustments when the connector tube 48 is inserted or removed, effectively fixing or releasing the connector tube 48. The inner wall of the second spring 45 is slidably connected to the outer wall of the connector tube 48, allowing the second spring 45 to extend and retract along the outer wall of the connector tube 48, ensuring its elastic function functions properly. The outer wall of the second spring 45 is slidably connected to the inner wall of the connecting tube 41. The sliding fit between the second spring 45 and the inner wall of the connecting tube 41 prevents the second spring 45 from shifting during extension and retraction, ensuring stable force on the limiting ring 46. The bottom of the hinge shaft 24 is slidably connected to the groove on the surface of the connecting plate 23, allowing the hinge shaft 24 to slide within the groove of the connecting plate 23, adapting to changes in the relative position between components.

[0017] The top of the hinge shaft 24 is rotatably connected to the front end of the rotating shaft 25. This rotatable connection allows relative rotation between the rotating shaft 25 and the hinge shaft 24, making the movement of related components more flexible. The outer side of the bracket 21 is fixedly connected to the outer wall of the housing 271. The fixed connection between the bracket 21 and the housing 271 enhances the stability of the overall structure and provides reliable support for other components. The outer side of the rotating shaft 25 is rotatably connected to the top of the housing 271. The rotating shaft 25 can rotate at the top of the housing 271, ensuring that it drives the related components to complete the predetermined actions.

[0018] Working principle: The main valve stem 1 at the top is the key actuator for realizing this function. The axial movement of the valve stem 1 can effectively control the opening and closing of the high-temperature gas passage. To ensure the long-term stable operation of the valve stem 1 in a high-temperature environment, a lubrication mechanism 2 is specially installed at the bottom of the valve stem 1 to provide continuous and reliable lubrication support for the movement of the valve stem 1. The lubrication mechanism 2 is equipped with a housing 271. The housing 271 not only protects the internal components, but also has a device on its surface for adding lubricating oil to the inside of the housing 271 to ensure timely replenishment of the lubricating medium. The operating power of the lubrication mechanism 2 is provided by the pneumatic cylinder 22 at the bottom. When the pneumatic cylinder 22 is started, it will drive the connecting plate 23 at the top to move. The surface of the connecting plate 23 is carefully designed with a groove structure. This groove provides precise guidance for the movement of the hinge shaft 24, so that the bottom of the hinge shaft 24 can slide smoothly along the groove on the surface of the connecting plate 23.

[0019] The top of the hinge shaft 24 is connected to the rotation shaft 25. As the hinge shaft 24 slides, the rotation shaft 25 rotates synchronously, thereby driving the top opening plate 26 to open and close. Multiple balls 272 are installed on the inner wall of the housing 271. These balls 272 are evenly distributed to form an efficient lubrication conduction structure. When the top bolt 273 moves downward, its surface will come into frictional contact with the balls 272. This friction causes the balls 272 to roll. During the rolling process of the balls 272, the lubricating oil stored inside the housing 271 can be carried out and accurately delivered to the surface of the parts that need lubrication. This achieves efficient transfer and utilization of the lubricating medium and effectively reduces the wear of the parts in high-temperature environments.

[0020] The bottom of this high-temperature shut-off valve is also equipped with a convenient and practical quick-disassembly mechanism 4, which greatly simplifies the installation, maintenance and replacement process of the valve. In the quick-disassembly structure, one side of the connecting pipe 41 is tightly connected to the valve body 3, ensuring the sealing and stability of the overall structure. The interface piece 44 inside the connecting pipe 41 and the connector pipe 48 adopt a precision fit connection method. Steel balls 47 are set on the outer wall of the connector pipe 48. During the connection process, these steel balls 47 will cleverly be stuck between the inner wall of the connector pipe 48 and the connecting pipe 41, forming a firm mechanical lock. In order to ensure the stability of the position of the steel balls 47 and prevent them from shifting during use and affecting the connection effect, a limiting ring 46 is specially set. The limiting ring 46 can effectively limit the movement range of the steel balls 47, so that the steel balls 47 always remain in the optimal locking position, thereby ensuring that the connector pipe 48 is firmly stuck inside the connecting pipe 41, realizing the reliability and safety of the connection structure, and also ensuring the sealing performance of the entire valve system.

[0021] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-temperature shut-off valve, comprising a valve stem (1), characterized in that: The bottom of the valve stem (1) is fixedly connected to a lubrication mechanism (2), the bottom of the lubrication mechanism (2) is fixedly connected to a valve body (3), and a quick disassembly mechanism (4) is fixedly connected to one side of the valve body (3). The lubrication mechanism (2) includes a bracket (21), the bottom of which is fixedly connected to the top of the valve body (3). A pneumatic cylinder (22) is installed at the bottom of the bracket (21). A connecting plate (23) is fixedly connected to the driving end of the pneumatic cylinder (22). A hinge shaft (24) is slidably connected to the top of the connecting plate (23). A rotating shaft (25) is rotatably connected to the rear end of the hinge shaft (24). An opening plate (26) is fixedly connected to the other end of the rotating shaft (25). A sliding assembly (27) is fixedly connected to the bottom of the opening plate (26).

2. The high-temperature shut-off valve according to claim 1, characterized in that: The quick disassembly mechanism (4) includes a connecting pipe (41), one side of which is fixedly connected to one side of the valve body (3). A fixing seat (42) is fixedly connected to the inner wall of the connecting pipe (41). A spring (43) is fixedly connected to the front end of the fixing seat (42). An interface piece (44) is fixedly connected to the other end of the spring (43). A spring (45) is fixedly connected to the front end of the interface piece (44). A limit ring (46) is slidably connected to the front end of the spring (45). A steel ball (47) is slidably connected to the front end of the limit ring (46). A connector pipe (48) is slidably connected to the bottom of the steel ball (47).

3. A high-temperature shut-off valve according to claim 1, characterized in that: The sliding assembly (27) includes a housing (271), the inner wall of which is slidably connected to the outer wall of the valve stem (1), and a plurality of balls (272) are slidably connected to the inner wall of the housing (271), and bolts (273) are slidably connected to the outer side of the balls (272).

4. A high-temperature shut-off valve according to claim 2, characterized in that: The outer wall of the connector tube (48) is slidably connected to the inner wall of the connector tube (41), and the inner side of the limiting ring (46) is slidably connected to the outer wall of the connector tube (48).

5. A high-temperature shut-off valve according to claim 2, characterized in that: The top of the steel ball (47) is slidably connected to the inner wall of the connecting pipe (41), and the bottom of the steel ball (47) is slidably connected to the outer wall of the connector pipe (48).

6. A high-temperature shut-off valve according to claim 2, characterized in that: The inner wall of the second spring (45) is slidably connected to the outer wall of the connector tube (48), and the outer wall of the second spring (45) is slidably connected to the inner wall of the connecting tube (41).

7. A high-temperature shut-off valve according to claim 1, characterized in that: The bottom of the hinge shaft (24) is slidably connected to the surface groove of the connecting plate (23), and the top of the hinge shaft (24) is rotatably connected to the front end of the rotating shaft (25).

8. A high-temperature shut-off valve according to claim 3, characterized in that: The outer side of the bracket (21) is fixedly connected to the outer wall of the housing (271), and the outer side of the rotating shaft (25) is rotatably connected to the top of the housing (271).

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