Efficient sealing stop valve assembly

Abstract

The utility model provides an efficient sealing stop valve assembly, which relates to the technical field of stop valves and comprises a valve body and a guide valve rod, a valve cavity is arranged in the valve body, a sealing valve seat is arranged in the valve cavity, the bottom end of the guide valve rod is movably coupled with a cross universal joint, the bottom of the cross universal joint is provided with an adjusting valve rod, and the bottom end of the adjusting valve rod is connected with a sealing valve core. A sealing valve clack is arranged in the center of the bottom face of the sealing valve element, a T-shaped guide groove is vertically formed in the inner wall of the valve cavity, a T-shaped connecting rod is arranged in the T-shaped guide groove in a sliding mode, and the end of the T-shaped connecting rod is connected with the side face of the adjusting valve rod. Therefore, fine adjustment of the interior of the whole valve cavity is achieved, the sealing valve clack is matched with the adjusting spring, pressure fluctuation can be effectively absorbed and adjusted, the pressure adjusting mechanism enables the stop valve assembly to adapt to pressure changes under different working conditions, and the problems of sealing failure or part damage and the like caused by pressure impact are solved.

Description

Technical Field

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

[0002] According to Chinese Publication No. CN113983182A, a high-sealing gate valve includes a valve body, a valve core, a valve stem, and a valve cover. A valve seat is formed within the valve body, and a sealing groove is provided on the valve seat. A sealing gasket is disposed within the sealing groove. The bottom of the valve core has a central boss surface corresponding to the valve seat, a second sealing groove, and a second boss surface corresponding to the first sealing groove. This creates a multi-layer sealing structure between the valve core and the valve seat, significantly improving the valve's sealing performance. Furthermore, the first sealing gasket and the sealing groove of the valve seat are interference-fitted, preventing displacement and ensuring a better sealing effect. The invention also includes a positioning limit plate, which effectively indicates when the valve is fully closed, ensuring consistent pressure of the valve core on the first sealing gasket after each closure, reducing damage to the first sealing gasket and improving overall performance.

[0003] The aforementioned patent documents and prior art have the following technical problems:

[0004] 1. Traditional gate valves lack an effective internal pressure regulation mechanism when facing high-pressure or unstable fluid conditions. They are often prone to damage to sealing components due to pressure surges, leading to seal failure, fluid leakage, component damage, and other problems. This seriously affects the safe and stable operation of the pipeline system, increasing maintenance costs and downtime.

[0005] 2. Traditional gate valves mostly use threaded seals or straight edge interlocking seals. These traditional sealing methods have drawbacks such as limited sealing contact area and simple sealing path, making them unsuitable for applications with high sealing requirements and prone to airflow or fluid leakage. This not only causes energy waste and environmental pollution, but also leads to reduced system efficiency and decreased stability due to leakage. Frequent maintenance and component replacement result in high long-term operating costs. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of poor pressure adaptability and inadequate sealing performance of existing gate valves, and to propose a high-efficiency sealing gate valve assembly.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency sealing shut-off valve assembly, comprising a valve body and a guide valve stem, wherein the valve body has a valve cavity inside, the valve cavity has a sealing valve seat inside, the bottom end of the guide valve stem is movably connected to a universal joint, the bottom of the universal joint is connected to an adjusting valve stem, the bottom end of the adjusting valve stem is connected to a sealing valve core, the center of the bottom surface of the sealing valve core is provided with a sealing valve flap, the inner wall of the valve cavity is vertically provided with a T-shaped guide groove, a T-shaped connecting rod is slidably provided inside the T-shaped guide groove, and the end of the T-shaped connecting rod is connected to the side of the adjusting valve stem.

[0008] Preferably, an installation ring is welded to the bottom surface of the inner wall of the sealing valve seat, and an adjusting spring is arranged in a circumferential array on the top surface of the installation ring. The adjusting spring abuts against the bottom surface of the sealing valve disc, and the outer wall of the sealing valve disc is in clearance fit with the inner wall of the sealing valve seat.

[0009] Preferably, the sealing valve seat has trapezoidal tenons evenly distributed around its circumference, and the bottom surface of the sealing valve core has trapezoidal tenons. The trapezoidal tenons correspond to the trapezoidal tenons, and the trapezoidal tenons and trapezoidal tenons are fitted with a clearance.

[0010] Preferably, a second flow guide pipe is connected to the bottom of the valve body, a first flow guide pipe is connected to the side of the valve body, and a support frame is welded between the valve body, the first flow guide pipe, and the second flow guide pipe.

[0011] Preferably, the valve body has a sealing flange on its top surface, the guide valve stem penetrates the top surface of the valve body, and a guide handwheel is connected to the top of the guide valve stem.

[0012] Preferably, the connection between the guide valve stem and the top surface of the valve body is sealed with a thread, and the connection edges between the sealing valve core and the sealing valve seat are also sealed.

[0013] Preferably, the surface of the sealing valve disc is coated with a silicone coating, and the vertical centerline of the sealing valve disc coincides with the vertical centerline of the sealing valve core.

[0014] Beneficial effects

[0015] This invention employs a unique internal structural design for the valve body. Through the coordinated operation of the guide valve stem, adjusting valve stem, universal joint, and T-shaped connecting rod, when the pressure inside the valve cavity is too high, the negative pressure generated by the second guide pipe can drive the T-shaped connecting rod to move up and down, thereby achieving fine-tuning of the entire valve cavity. At the same time, the sealing valve disc, in conjunction with the adjusting spring, can effectively absorb and regulate pressure fluctuations. This pressure regulation mechanism enables the shut-off valve assembly to adapt to pressure changes under different operating conditions. Even in high-pressure or unstable pressure fluid systems, it can still maintain a stable operating state, reducing problems such as seal failure or component damage caused by pressure shocks. This improves the safety and reliability of pipeline system operation and reduces maintenance costs and downtime risks.

[0016] This invention abandons the traditional threaded seal and straight-edge interlocking seal structure between the sealing valve core and the sealing valve seat. Instead, it innovatively employs a trapezoidal tenon and trapezoidal groove to form a serrated edge structure, significantly increasing the sealing contact area and the complexity of the sealing path, effectively preventing airflow or fluid leakage. Furthermore, the silicone coating applied to the surface of the sealing valve disc further fills the tiny gaps, enhancing the sealing effect. This superior sealing performance not only ensures effective shut-off and precise control of fluids within the pipeline system, reducing energy waste and environmental pollution from media leakage, but also improves the overall efficiency and stability of the pipeline system, extends equipment lifespan, and reduces the need for frequent maintenance or component replacement due to leakage, thereby lowering long-term operating costs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a diagram showing the internal structure of the valve body of this utility model;

[0019] Figure 3 This is a front sectional view of the valve body of this utility model;

[0020] Figure 4 For the present utility model Figure 3 Enlarged view of point A;

[0021] Figure 5 This is a side sectional view of the valve body of this utility model;

[0022] Figure 6 For the present utility model Figure 5 Enlarged view of point B;

[0023] Figure 7 This is a structural diagram of the sealing valve core connection of this utility model;

[0024] Figure 8 This is a structural diagram of the sealing valve seat connection of this utility model.

[0025] Legend:

[0026] 1. Valve body; 2. Valve cavity; 3. Guide handwheel; 4. Support frame; 5. Sealing flange; 6. Guide valve stem; 7. Universal joint; 8. Adjusting valve stem; 9. Sealing valve core; 10. Sealing valve disc; 11. Trapezoidal tenon; 12. Sealing valve seat; 13. Trapezoidal tenon groove; 14. Mounting ring; 15. Adjusting spring; 16. T-shaped guide groove; 17. T-shaped connecting rod; 18. First guide pipe; 19. Second guide pipe. Detailed Implementation

[0027] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0028] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific Implementation Example 1:

[0030] Reference Figure 1-8 A high-efficiency sealing shut-off valve assembly includes a valve body 1 and a guide valve stem 6. The valve body 1 has a valve chamber 2 inside. During installation, the valve body 1 is fixed in the pipeline system and connected with the first guide pipe 18 and the second guide pipe 19 to form a complete fluid channel. During normal operation, the relative position of the sealing valve core 9 and the sealing valve seat 12 is changed according to the operation of the guide valve stem 6, thereby controlling the conduction or shut-off state of the fluid in the valve body 1. In addition, during the fluid flow process, it withstands the pressure and impact force of the fluid and maintains the stability of the overall structure.

[0031] Valve chamber 2 is the space within valve body 1 where fluid flows and is controlled. It provides installation and working space for components such as sealing valve seat 12, regulating valve stem 8, and sealing valve core 9, enabling effective flow guidance and shut-off of fluid. During equipment operation, the state of valve chamber 2 changes as the sealing valve core 9 moves up and down. When fluid needs to be guided, the sealing valve core 9 is raised by operating the guide valve stem 6, opening the space of valve chamber 2. Fluid flows in from the first guide pipe 18, passes through valve chamber 2, and flows out from the second guide pipe 19. When fluid needs to be shut off, the sealing valve core 9 is lowered by operating the guide valve stem 6 to fit tightly against the sealing valve seat 12, sealing the space of valve chamber 2 and preventing fluid from passing through.

[0032] A universal joint 7 is movably connected to the bottom of the guide valve stem 6. A regulating valve stem 8 is connected to the bottom of the universal joint 7. A sealing valve core 9 is connected to the bottom of the regulating valve stem 8. A sealing valve disc 10 is located at the center of the bottom surface of the sealing valve core 9. A T-shaped guide groove 16 is vertically opened on the inner wall of the valve cavity 2. A T-shaped connecting rod 17 slides inside the T-shaped guide groove 16, and the end of the T-shaped connecting rod 17 is connected to the side of the regulating valve stem 8. The guide valve stem 6 serves as the manual control component for the operator to operate the shut-off valve, transmitting external rotational force to the regulating valve stem 8 to achieve the up-and-down movement of the sealing valve core 9, thereby controlling the opening and closing states of the shut-off valve. The connection between the guide valve stem 6 and the top surface of the valve body 1 is sealed with threads. The sealing valve core 9 and the sealing valve... All edges of the seat 12 are sealed, and the threaded connection and sealing between it and the top surface of the valve body 1 ensure operational stability and sealing, preventing fluid leakage from the connection between the guide valve stem 6 and the valve body 1. When the shut-off valve needs to be opened, the operator rotates the guide handwheel 3 clockwise, causing the guide valve stem 6 to move upward under the action of the thread. This, through the universal joint 7, drives the regulating valve stem 8 and the sealing valve core 9 upward, separating the sealing valve core 9 from the sealing valve seat 12, opening the valve chamber 2, and allowing fluid to flow. When the shut-off valve needs to be closed, the operator rotates the guide handwheel 3 counterclockwise, causing the guide valve stem 6 to move downward, causing the sealing valve core 9 to descend and tightly fit against the sealing valve seat 12, achieving a seal and stopping fluid flow. Throughout the entire operation, the threaded sealing between the guide valve stem 6 and the top surface of the valve body 1 ensures that fluid will not leak from the connection, enabling precise control of the shut-off valve by the operator. The position of the sealing valve core 9 can be easily controlled through a simple rotation operation, thereby achieving fluid flow and shut-off. Threaded connections and sealing treatments ensure operational reliability and sealing performance, improve the overall performance of the gate valve, and reduce the risk of malfunctions and leaks caused by improper operation or poor sealing.

[0033] The universal joint 7 connects the guide valve stem 6 and the regulating valve stem 8, resolving misalignment issues that may arise due to installation errors or movement of internal components of the valve body 1. It ensures that the rotational motion of the guide valve stem 6 is accurately converted into the vertical linear motion of the regulating valve stem 8, allowing the sealing valve core 9 to move smoothly up and down. This improves the operational flexibility and reliability of the gate valve. The universal joint 7 has a unique structure, allowing free rotation within a certain angle range. When the guide valve stem 6 rotates, even with a deviation from the axis of the regulating valve stem 8, the universal joint 7 can still transmit the rotational motion of the guide valve stem 6 to the regulating valve stem 8. Furthermore, during the transmission process, it automatically adapts to the axial deviation, enabling the regulating valve stem 8 to move vertically along the axial direction of the valve body 1. During the operation of the gate valve, regardless of whether the guide valve stem 6 and the regulating valve... Regardless of installation errors between the rods 8 or changes in the axis caused by the movement of internal components of the valve body 1, the universal joint 7 can effectively transmit the rotational movement of the guide valve rod 6 to the regulating valve rod 8. For example, when the guide valve rod 6 rotates, the joints of the universal joint 7 will adjust their angles according to the actual situation, converting the rotational force into the up-and-down thrust of the regulating valve rod 8, so that the regulating valve rod 8 drives the sealing valve core 9 to move smoothly up and down, realizing the conduction and shut-off control of the gate valve. This improves the adaptability of the gate valve to installation and operating conditions, reduces the installation difficulty and cost caused by excessively high component installation accuracy requirements, and ensures the accuracy and reliability of the motion transmission between the guide valve rod 6 and the regulating valve rod 8 under various operating conditions, making the operation of the gate valve more flexible and smooth, and extending the service life of the equipment.

[0034] Under the action of the guide valve stem 6 and the universal joint 7, the regulating valve stem 8 achieves vertical linear movement, driving the sealing valve core 9 to move up and down within the valve cavity 2, thereby controlling the flow and cutoff of fluid. Furthermore, the T-shaped connecting rod connected to its side cooperates with the T-shaped guide groove on the inner wall of the valve cavity 2, providing guidance and stable support for the vertical movement of the regulating valve stem 8. Simultaneously, it participates in the fine-tuning of the internal pressure of the valve cavity 2 when the internal pressure changes. When the guide valve stem 6 rotates and transmits force through the universal joint 7, the regulating valve stem 8, constrained by the T-shaped connecting rod and the T-shaped guide groove, can only move up and down along the axial direction of the valve body 1. In normal operation, the vertical movement of the regulating valve stem 8 directly drives the movement of the sealing valve core 9, controlling the flow of fluid. When the pressure inside valve chamber 2 is too high, the negative pressure generated by the second guide pipe 19 will act on the regulating valve stem 8 through the T-shaped connecting rod, causing the regulating valve stem 8 to make slight adjustments up and down within a certain range to balance the pressure inside valve chamber 2. In the daily operation of the shut-off valve, according to the rotation direction and angle of the guide valve stem 6, the regulating valve stem 8 moves stably up and down under the guidance of the T-shaped connecting rod and the T-shaped guide groove. For example, when the guide valve stem 6 rotates clockwise and rises, the regulating valve stem 8 drives the sealing valve core 9 to rise, the valve chamber 2 opens, and fluid flows through; when the guide valve stem 6 rotates counterclockwise and descends, the regulating valve stem 8 drives the sealing valve core 9 to descend, the valve chamber 2 closes, and fluid is cut off. When abnormal pressure fluctuations occur inside valve chamber 2, such as excessive pressure, the negative pressure in the second guide pipe 19 is transmitted to the regulating valve stem 8 via the T-shaped connecting rod. The regulating valve stem 8 will make corresponding up-and-down fine adjustments according to the magnitude and direction of the negative pressure, causing a slight change in the gap between the sealing valve core 9 and the sealing valve seat 12. This regulates the internal pressure of valve chamber 2, maintains the stable operation of the shut-off valve, and precisely controls the position of the sealing valve core 9, achieving effective flow and shut-off control of the fluid. Simultaneously, the cooperation between the T-shaped connecting rod and the T-shaped guide groove improves the stability and guidance of the regulating valve stem 8's movement, reducing the possibility of deviation or jamming of the regulating valve stem 8 due to vibration or other factors. The ability to respond promptly and make fine adjustments when the internal pressure of valve chamber 2 changes enhances the adaptability and stability of the shut-off valve to different operating conditions, improving the safety and reliability of the pipeline system.

[0035] A sealing valve seat 12 is provided inside the valve cavity 2. An installation ring 14 is welded to the bottom surface of the inner wall of the sealing valve seat 12. Adjusting springs 15 are arranged in a circumferential array on the top surface of the installation ring 14, and the adjusting springs 15 abut against the bottom surface of the sealing valve disc 10. The outer wall of the sealing valve disc 10 is in clearance fit with the inner wall of the sealing valve seat 12. The sealing valve seat 12 cooperates with the sealing valve core 9 to achieve sealing of the valve cavity 2 and prevent fluid leakage. Simultaneously, its internal structures, such as the installation ring 14 and the adjusting springs 15, work in conjunction with the sealing valve core 9 to regulate and control the internal pressure of the valve cavity 2, ensuring stable operation of the gate valve under different working conditions. The inner wall of the sealing valve seat 12 and the outer wall of the sealing valve core 9 are tightly fitted to form a sealing surface. When the sealing valve core 9 descends and contacts the sealing valve seat 12, the sealing valve disc 10 adheres to the inner wall of the sealing valve seat 12, and the bottom surface of the sealing valve disc 10 abuts against the adjusting springs 15. The interaction between the two achieves the sealing of the fluid. When the pressure inside the valve chamber 2 changes, the elastic deformation of the adjusting spring 15 can absorb pressure fluctuations and maintain the stability of the seal. At the same time, the trapezoidal tenon 13 on the surface of the sealing valve seat 12 and the trapezoidal tenon 11 on the bottom surface of the sealing valve core 9 cooperate to increase the reliability of the seal. When the shut-off valve is closed, the sealing valve core 9 descends under the action of the guide valve rod 6. The sealing valve disc 10 first contacts the inner wall of the sealing valve seat 12. Then, as the sealing valve core 9 descends further, the adjusting spring 15 is compressed, generating an upward elastic force, which makes the sealing valve disc 10 fit tightly against the inner wall of the sealing valve seat 12 to achieve a seal. When the pressure inside the valve chamber 2 changes, such as when the pressure rises, the adjusting spring 15 will be further compressed to adapt to the pressure change and maintain the seal. When the pressure drops, the elastic force of the spring will push the sealing valve disc 10 to maintain the sealing state. Meanwhile, the fit between the trapezoidal tenon 11 and the trapezoidal tenon 13 enhances the sealing effect throughout the process, preventing fluid leakage from the sealing edge, providing a reliable sealing function, effectively preventing fluid leakage, and ensuring the sealing performance of the pipeline system. By adjusting the fit between the spring 15 and the sealing valve disc 10, it can adapt to pressure fluctuations within a certain range, improving the stability and reliability of the gate valve. Furthermore, the sealing structure of the trapezoidal tenon 11 and the trapezoidal tenon 13 further enhances the sealing performance, reduces the frequency of maintenance and repair, and lowers operating costs.

[0036] The sealing valve seat 12 has trapezoidal tenons 13 evenly distributed around its circumference, and the sealing valve core 9 has trapezoidal tenons 11 distributed around its bottom circumference. The trapezoidal tenons 11 and trapezoidal tenons 13 are positioned correspondingly and are fitted with a clearance. The trapezoidal tenons 11 are located on the surface of the sealing valve seat 12 and engage with the trapezoidal tenons 11 on the bottom surface of the sealing valve core 9 to form a serrated edge structure. This increases the contact area of ​​the sealing surface and the complexity of the sealing path, thereby improving sealing performance and effectively preventing fluid leakage from the sealing edge. Due to the shape characteristics of the trapezoidal tenons 13 and 11, when fluid attempts to leak from the sealing edge, it needs to bypass multiple serrated sealing interfaces, increasing the resistance and difficulty of fluid leakage. This significantly improves sealing performance, reduces the possibility of fluid leakage, reduces energy loss and environmental pollution risks, improves the reliability and stability of the gate valve, extends the service life of the equipment, reduces the frequency of maintenance and repair, and lowers operating costs.

[0037] A second flow guide pipe 19 is connected to the bottom of the valve body 1, and a first flow guide pipe 18 is connected to the side of the valve body 1. A support frame 4 is welded between the valve body 1, the first flow guide pipe 18, and the second flow guide pipe 19. A sealing flange 5 is provided on the top surface of the valve body 1. A guide valve stem 6 penetrates the top surface of the valve body 1, and a guide handwheel 3 is connected to the top of the guide valve stem 6. A silicone coating is applied to the surface of the sealing valve disc 10. The vertical centerline of the sealing valve disc 10 coincides with the vertical centerline of the sealing valve core 9. The sealing valve core 9 cooperates with the sealing valve seat 12 to seal the valve cavity 2 and control the fluid. The sealing valve core 9 is closed and its sealing valve disc 10 is tightly fitted with the sealing valve seat 12 under the action of the adjusting spring 15 to form a sealing surface. At the same time, the trapezoidal tenon 11 on its bottom surface cooperates with the trapezoidal tenon groove 13 on the surface of the sealing valve seat 12 to enhance the sealing effect and prevent fluid leakage. The outer wall of the sealing valve core 9 is in close contact with the inner wall of the sealing valve seat 12 in the normal closed state to form the first sealing defense line. Under the elastic force of the adjusting spring 15, the sealing valve disc 10 is further fitted with the inner wall of the sealing valve seat 12 to form a tighter sealing surface and prevent fluid from passing through. The fit between the trapezoidal tenon 11 and the trapezoidal tenon 13 forms a serrated structure at the sealing edge, increasing the resistance to fluid leakage and further improving the sealing performance. When the gate valve is closed, the sealing valve core 9 descends under the action of the regulating valve stem 8, and the sealing valve disc 10 first contacts the inner wall of the sealing valve seat 12. Then, as the sealing valve core 9 descends further, the regulating spring 15 is compressed, and the sealing valve disc 10 fits more tightly against the inner wall of the sealing valve seat 12, achieving a seal. When the gate valve is open, the sealing valve core 9 rises, and the sealing valve disc 10 separates from the sealing valve seat 12, allowing fluid to pass through the valve chamber 2. Throughout the process, the trapezoidal tenon 11 and the trapezoidal tenon 13 remain in fit, enhancing the sealing effect, providing reliable sealing function, effectively preventing fluid leakage, and ensuring the sealing performance of the pipeline system. The sealing structure of the trapezoidal tenon 11 and the trapezoidal tenon 13 further enhances the sealing performance, reduces the frequency of maintenance and repair, lowers operating costs, and the fit between the sealing valve disc 10 and the regulating spring 15 can adapt to pressure fluctuations within a certain range, improving the stability and reliability of the gate valve. Specific Implementation Example 2:

[0039] Reference Figure 1-8 Based on the content of the above specific embodiments, the following content is further disclosed:

[0040] The sealing valve disc 10, serving as the direct sealing component between the sealing valve core 9 and the sealing valve seat 12, fits tightly against the inner wall of the sealing valve seat 12 under the action of the adjusting spring 15, forming a sealing surface to prevent fluid leakage. The silicone coating on its surface further enhances the sealing performance. Simultaneously, its shape and size are matched to the sealing valve seat 12, ensuring reliable sealing. When the sealing valve core 9 descends and contacts the sealing valve seat 12, the sealing valve disc 10, under the elastic force of the adjusting spring 15, fits tightly against the inner wall of the sealing valve seat 12. The silicone coating possesses excellent flexibility and sealing properties, capable of filling the minute gaps between the sealing valve disc 10 and the inner wall of the sealing valve seat 12, forming an effective seal. When the pressure inside valve chamber 2 changes, the sealing valve disc 10, under the action of the adjusting spring 15, can adaptively adjust its fit with the inner wall of the sealing valve seat 12 to maintain sealing performance. During the closing process of the shut-off valve, as the sealing valve core 9 descends, the sealing valve disc 10 gradually approaches the inner wall of the sealing valve seat 12. The adjusting spring 15 is compressed, generating an upward elastic force, which makes the sealing valve disc 10 fit tightly against the inner wall of the sealing valve seat 12. When the pressure inside valve chamber 2 increases, the sealing valve disc 10 tends to move outward under the action of fluid pressure, but the elastic force of the adjusting spring 15 will prevent it from moving, so that the sealing valve disc 10 always maintains a tight fit with the inner wall of the sealing valve seat 12. When the pressure inside valve chamber 2 decreases, the elastic force of the adjusting spring 15 will push the sealing valve disc 10 to fit further against the inner wall of the sealing valve seat 12, ensuring the sealing effect. Throughout the process, the silicone coating always plays a role in filling gaps and enhancing sealing, providing reliable sealing function, effectively preventing fluid leakage, and ensuring the sealing performance of the pipeline system. The use of silicone coating improves sealing performance, reduces leakage risk, and can adapt to pressure fluctuations within a certain range, thereby improving the stability and reliability of the shut-off valve, extending the service life of the equipment, and reducing maintenance costs.

[0041] The adjusting spring 15 provides elastic force to the sealing valve disc 10, ensuring a tight fit between the sealing valve disc 10 and the inner wall of the sealing valve seat 12, thus achieving a sealing function. Furthermore, when the pressure inside the valve chamber 2 changes, it absorbs pressure fluctuations through its own elastic deformation, maintaining the stability of the seal and ensuring that the gate valve can effectively seal the fluid under different operating conditions. Based on its own elastic characteristics, the adjusting spring 15 generates corresponding elastic force when compressed or stretched. When the sealing valve core 9 descends and contacts the sealing valve seat 12, the adjusting spring 15 is compressed, generating an upward elastic force that ensures a tight fit between the sealing valve disc 10 and the inner wall of the sealing valve seat 12, achieving a seal. When the pressure inside the valve chamber 2 increases, the adjusting spring 15 is further compressed to adapt to pressure changes and maintain the seal; when the pressure inside the valve chamber 2 decreases, the spring force pushes the sealing valve disc 10, maintaining the sealing state. Throughout the entire operating cycle of the gate valve, the adjusting spring 15 is always in working condition. When the gate valve is closed, the adjusting spring 15 is compressed, providing the initial sealing elastic force to the sealing valve disc 10. During the pressure change inside valve chamber 2, the adjusting spring 15 automatically adjusts its compression or stretching degree according to the magnitude and direction of the pressure, generating corresponding elastic force changes to balance the pressure inside valve chamber 2, maintain the tight fit between the sealing valve disc 10 and the inner wall of the sealing valve seat 12, ensure that the sealing performance of the gate valve is not affected by pressure fluctuations, adapt to changes in the pressure inside valve chamber 2, automatically adjust the sealing force, improve the sealing stability and reliability of the gate valve, reduce the risk of leakage caused by pressure fluctuations, extend the service life of sealing components, reduce maintenance costs, and ensure the safe and stable operation of the pipeline system.

[0042] In summary:

[0043] 1. Employing a unique internal structural design, the valve body 1 utilizes the coordinated operation of the guide valve stem 6, regulating valve stem 8, universal joint 7, and T-shaped connecting rod. When the internal pressure of the valve chamber 2 is too high, the negative pressure generated by the second guide pipe 19 can drive the T-shaped connecting rod to move up and down, thereby achieving fine-tuning of the entire valve chamber 2. Simultaneously, the sealing valve disc 10, in conjunction with the regulating spring 15, can effectively absorb and regulate pressure fluctuations. This pressure regulation mechanism enables the shut-off valve assembly to adapt to pressure changes under different operating conditions. Even in high-pressure or unstable fluid systems, it can maintain a stable operating state, reducing problems such as sealing failure or component damage caused by pressure shocks. This improves the safety and reliability of pipeline system operation and reduces maintenance costs and downtime risks.

[0044] 2. The sealing valve core 9 and sealing valve seat 12 abandon the traditional threaded seal and straight edge interlocking seal structure. Instead, they innovatively employ a trapezoidal tenon 11 and trapezoidal groove 13 to form a serrated edge structure, greatly increasing the sealing contact area and the complexity of the sealing path, effectively preventing airflow or fluid leakage. Furthermore, the silicone coating on the surface of the sealing valve disc 10 further fills the tiny gaps, enhancing the sealing effect. This superior sealing performance not only ensures effective shut-off and precise control of fluids within the pipeline system, reducing energy waste and environmental pollution from media leakage, but also improves the overall efficiency and stability of the pipeline system, extends equipment lifespan, and reduces the need for frequent maintenance or component replacement due to leakage.

[0045] This reduces long-term operating costs.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency sealing shut-off valve assembly, comprising a valve body (1) and a guide valve stem (6), characterized in that: The valve body (1) has a valve cavity (2) inside, and a sealing valve seat (12) is provided inside the valve cavity (2). A universal joint (7) is movably connected to the bottom end of the guide valve rod (6). An adjusting valve rod (8) is connected to the bottom of the universal joint (7). A sealing valve core (9) is connected to the bottom end of the adjusting valve rod (8). A sealing valve flap (10) is provided at the center of the bottom surface of the sealing valve core (9). A T-shaped guide groove (10) is vertically opened on the inner wall of the valve cavity (2). 6) A T-shaped connecting rod (17) is slidably provided inside the T-shaped guide groove (16), and the end of the T-shaped connecting rod (17) is connected to the side of the regulating valve rod (8). An installation ring (14) is welded to the bottom surface of the inner wall of the sealing valve seat (12). An adjusting spring (15) is arranged in a circumferential array on the top surface of the installation ring (14), and the adjusting spring (15) abuts against the bottom surface of the sealing valve disc (10). The outer wall of the sealing valve disc (10) is in clearance fit with the inner wall of the sealing valve seat (12).

2. The high-efficiency sealing shut-off valve assembly according to claim 1, characterized in that: The sealing valve seat (12) has a trapezoidal tenon groove (13) evenly distributed around its surface, and the sealing valve core (9) has a trapezoidal tenon (11) around its bottom surface. The trapezoidal tenon (11) and the trapezoidal tenon groove (13) are positioned correspondingly, and the trapezoidal tenon (11) and the trapezoidal tenon groove (13) are fitted with a clearance.

3. The high-efficiency sealing shut-off valve assembly according to claim 1, characterized in that: The bottom of the valve body (1) is connected to a second flow guide pipe (19), and the side of the valve body (1) is connected to a first flow guide pipe (18). A support frame (4) is welded between the valve body (1), the first flow guide pipe (18), and the second flow guide pipe (19).

4. The high-efficiency sealing shut-off valve assembly according to claim 1, characterized in that: The valve body (1) has a sealing flange (5) on its top surface, and the guide valve stem (6) penetrates the top surface of the valve body (1). The top end of the guide valve stem (6) is connected to a guide handwheel (3).

5. The high-efficiency sealing shut-off valve assembly according to claim 1, characterized in that: The connection between the guide valve stem (6) and the top surface of the valve body (1) is sealed with threads, and the connection between the sealing valve core (9) and the sealing valve seat (12) is sealed at the edges.

6. The high-efficiency sealing shut-off valve assembly according to claim 1, characterized in that: The surface of the sealing valve disc (10) is coated with a silicone coating, and the vertical center line of the sealing valve disc (10) coincides with the vertical center line of the sealing valve core (9).

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