Self-locking sealing ball valve

Abstract

The utility model belongs to the field of valves, and discloses a self-locking sealing ball valve which comprises a valve body, a valve rod and a handle, a valve ball is arranged in the valve body and connected with the handle through the valve rod, a valve ball channel is formed in the valve ball, the valve rod is driven by twisting the handle, then the valve ball is driven to twist, the valve ball channel is controlled to rotate, and opening and closing of the valve body are achieved. The two ports of the valve body are connected with sealing raw material belts, and the sealing raw material belts are sleeved with self-locking sealing gaskets. Through the combined design of the sealing raw material belt and the self-locking sealing gasket, the two ports of the valve body form a double-sealing structure, the sealing effect is effectively improved, the long-term stable sealing performance can be kept in a high-pressure or corrosive medium environment, and the leakage risk is avoided. The valve can run for a long time under extreme working conditions, the sealing function is not lost, the service life is prolonged, and the applicability of a product is improved. During construction, installation personnel can tighten the self-locking sealing bolt to extrude the bevel angle pad, plugging is conducted in time, and property loss is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the valve field, especially relates to a self locking sealing ball valve. BACKGROUND

[0002] The self locking ball valve is a valve device that can automatically lock the on-off state of the ball valve through a self locking device. Its core function is to control the on-off of the fluid in the pipeline and ensure that the valve can maintain a stable state under certain conditions, unaffected by external interference or misoperation. This type of ball valve is widely used in the oil, chemical, natural gas and other industries, especially in scenarios where safety and stability are highly required, to prevent potential safety hazards caused by accidental opening or closing of the valve. The self locking mechanism of the self locking ball valve can effectively prevent accidental operation caused by external environment or human factors, improving the safety of equipment operation. In particular, in high temperature, high pressure or toxic gas transportation scenarios, the self locking function can ensure that the valve remains in the predetermined position, reducing the risk of operation. Compared with traditional ball valves, some self locking ball valves can improve functionality while maintaining high operational convenience through optimized design. Modern self locking ball valves are usually made of high strength materials and can operate stably for a long time under harsh conditions.

[0003] At present, a Chinese patent document with publication number CN 215110619 U discloses a high sealing ball valve with self locking function, which comprises a valve body, a ball core is arranged in the valve body, the ball core is connected with a valve rod, a clamping block is arranged at the top of the valve rod, the clamping block is in the shape of an oblong, the diameter of the valve rod is smaller than the length and width of the clamping block, a rotating handle is sleeved on the valve rod, a boss is arranged on the upper edge of the rotating handle, a clamping hole matched with the clamping block is arranged in the boss, a circular hole is arranged on the lower edge of the rotating handle, a spring is sleeved on the valve rod and fixed in the circular hole, a baffle is arranged at the top of the clamping block, and the rotating handle is fixed between the baffle and the spring. The sealing structure of the ball valve is single, and it cannot meet the long-term sealing requirements in high pressure or corrosive medium environment. SUMMARY

[0004] In view of the above technical problems, the utility model provides a self locking sealing ball valve, which has a double sealing structure, good sealing effect, and can meet the long-term sealing requirements in high pressure or corrosive medium environment.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A self locking sealing ball valve, comprising a valve body, a valve rod and a handle, the valve body is internally provided with a valve ball, the valve ball and the handle are connected through the valve rod, a valve ball passage is formed in the valve ball, the valve rod is driven by twisting the handle, thereby driving the valve ball to twist, controlling the rotation of the valve ball passage, and realizing the opening and closing of the valve body, both ports of the valve body are connected with sealing raw material belts, and the sealing raw material belts are sleeved with self locking sealing bolts.

[0007] By adopting the above technical scheme, the sealing raw material belt and the self-locking sealing bolt of the two ports of the valve body jointly constitute a double sealing structure. Compared with the traditional single sealing scheme, the sealing effect can be significantly improved, especially in a high-pressure or corrosive medium environment, reliable sealing performance can be achieved for a long time, and the risk of leakage can be avoided. The combination design of the sealing raw material belt and the self-locking sealing bolt enables the valve to operate for a long time under harsh working conditions (such as high pressure, high temperature, or corrosive medium) without losing sealing performance, thereby improving the application range and durability of the product. The design of the self-locking sealing bolt not only provides sealing function, but also prevents the valve ball from changing the opening and closing state due to external vibration or misoperation through its locking property. The valve ball is rotated to control opening and closing by the valve stem and handle, and the operation process is simple and intuitive, so that the user can quickly switch the valve state. The application of the self-locking sealing bolt can effectively slow down the wear rate of the sealing raw material belt, thereby prolonging the service life of the sealing system and reducing the maintenance frequency and replacement cost.

[0008] Further setting, the valve body is provided with an inclined angle gasket on both ends.

[0009] By adopting the above technical scheme, the design of the inclined angle gasket can better fit the contact surface of the valve body and the pipeline connection port, so that stable sealing effect can be achieved even on irregular or slightly deformed pipeline interfaces, and medium leakage can be prevented. The inclined angle gasket can effectively disperse the pressure of the two ports of the valve body through its inclined structure, so as to avoid damage or deformation caused by stress concentration of the sealing gasket, and adapt to the use demand under high pressure working condition. The flexible property of the inclined angle gasket can absorb the slight displacement caused by pipeline vibration and thermal expansion, reduce the impact of vibration on the sealing surface of the valve body, and prolong the service life of the sealing. Even in a high-frequency vibration environment, the inclined angle gasket can provide stronger sealing retention capacity to prevent loosening or leakage caused by vibration. When installing, if the installer forgets to wind the raw material belt or uses less raw material belt, leakage may occur. The self-locking sealing bolt can be tightened to extrude the inclined angle gasket, so that the leakage can be stopped in time, and property loss can be avoided.

[0010] Further setting, the valve body includes a first port and a second port, the sealing raw material belt includes a first sealing raw material belt and a second sealing raw material belt, the first port is fixedly connected with the first sealing raw material belt, and the second port is detachably connected with the second sealing raw material belt.

[0011] By adopting the technical scheme, the fixed connection of the first sealing raw material belt and the first port ensures the sealing performance of the port to be more stable and not prone to sealing failure due to frequent operation or external vibration. The detachable connection of the second sealing raw material belt and the second port enables the sealing structure to have flexibility while ensuring the sealing effect, and adapt to different working condition requirements. The detachable connection design of the second port enables users to quickly install or replace the second sealing raw material belt in actual application, improving the maintenance efficiency. The detachable structure reduces the disassembly requirement for the overall valve, reducing the operation complexity. The fixed connection design of the first port provides higher sealing reliability at the key position, and can effectively prevent leakage in high-pressure or high-flow rate environments. The detachable design of the second port is suitable for scenarios that require frequent replacement of sealing materials or cleaning and maintenance, enhancing the applicability of the valve.

[0012] Further settings, the second port forms an internal thread, and the second sealing raw material belt forms an external thread, and the internal thread and the external thread are matched.

[0013] By adopting the technical scheme, the close cooperation of the internal thread and the external thread forms a mechanical locking effect, which can effectively prevent the medium from leaking along the thread gap and improve the sealing reliability. In cooperation with the sealing raw material belt, the sealing effect is further improved, and the risk of loosening and leakage caused by improper installation or long-term use is reduced. The threaded connection enables the second port and the second sealing raw material belt to be quickly disassembled and assembled, simplifying the operation process of replacement or maintenance. Compared with other connection methods (such as welding or gluing), threaded connection does not require special tools or consumables, reducing the operation difficulty and maintenance cost.

[0014] Further settings, the second sealing raw material belt is provided with a first valve seat, the valve body is provided with a second valve seat, and the valve ball is arranged between the first valve seat and the second valve seat.

[0015] By adopting the technical scheme, the double valve seats can evenly distribute the stress of the valve ball, reducing the wear and failure of a single sealing point caused by excessive compression, thereby prolonging the service life of the valve. The valve ball is clamped and fixed by the first valve seat and the second valve seat, forming a stable support structure, which can enable the valve ball to maintain good rotation accuracy during operation, avoiding jamming or abnormal wear caused by uneven stress. The double valve seats can effectively absorb vibration and impact during operation, improving the impact resistance and operation stability of the valve as a whole.

[0016] Further settings, sealing rings are arranged between the valve ball and the first valve seat and the second valve seat.

[0017] By adopting the above technical scheme, the sealing ring is arranged to form a multi-point sealing effect between the valve ball and the first valve seat and the second valve seat, effectively reducing the possibility of medium leakage, and ensuring sealing reliability in high-pressure or corrosive medium scenarios. The sealing ring automatically adjusts the sealing contact surface through elastic deformation according to the wear or pressure change during long-term use of the valve, thereby maintaining good sealing performance and prolonging the service life.

[0018] Further arrangement, the handle forms a limiting part, the valve stem is provided with a limiting block, and the limiting block cooperates with the limiting part.

[0019] By adopting the above technical scheme, the limiting part cooperates with the limiting block to accurately limit the rotation range of the handle, ensuring that the valve stem always stays at the predetermined position of full opening or full closing, avoiding flow control errors caused by inaccurate position. The limiting design can prevent the handle from rotating beyond the range, avoid damage or jamming of the valve stem and valve ball due to excessive twisting, and improve the safety of system operation. The limiting part and the limiting block limit the rotation angle of the handle, avoid unnecessary extrusion of the sealing surface between the valve stem and the valve seat, and prolong the service life of the sealing structure and internal components.

[0020] Further arrangement, the material of the sealing raw material belt is polytetrafluoroethylene.

[0021] By adopting the above technical scheme, polytetrafluoroethylene has extremely low friction coefficient and can provide reliable sealing effect in dynamic and static conditions. The material surface is smooth, which can reduce the friction loss between the valve stem and the sealing belt, improve the stability of valve operation and the service life of sealing parts. Polytetrafluoroethylene can withstand almost all chemical media, including strong acids, strong bases and organic solvents, and can be used in corrosive media for a long time without being eroded. Polytetrafluoroethylene (PTFE) can work stably at a temperature range of-200℃ to 260℃, meeting the sealing requirements in high-temperature working conditions. It can still maintain soft properties in extremely low temperature environment and will not affect the sealing performance due to low-temperature brittleness.

[0022] Further arrangement, the material of the self-locking sealing bolt is silicone rubber or nitrile rubber.

[0023] By adopting the above technical scheme, the silicone rubber can maintain good elasticity and sealing performance in the temperature range of-60 DEG C to +250 DEG C, and is suitable for use requirements under extreme high temperature working conditions. In a low temperature environment, it does not become brittle, maintains elasticity and sealing effect, and is suitable for frozen or low temperature pipeline systems. The silicone rubber has good resistance to various chemicals (such as acid, alkali and salt), and is suitable for various medium environments. The flexibility and resilience of the silicone rubber material enable it to closely fit the sealing surface, improve the sealing effect, and prevent medium leakage. The nitrile rubber (NBR) has excellent resistance to petroleum-based oils (such as lubricating oil and fuel), and has good resistance to alcohol, ether and other chemical solvents. The nitrile rubber material has strong compression resistance under long-term stress, and can maintain a stable sealing state. The high wear resistance makes it suitable for long-term repeated operation of the ball valve seal. The working temperature of the nitrile rubber is generally-30 DEG C to 120 DEG C, and is suitable for medium temperature working conditions. The high elasticity and flexibility of the silicone rubber and the nitrile rubber can play a key role in the self-locking function, ensuring that the sealing gasket can realize dynamic sealing and self-locking stability. Both materials can adapt to slight machining errors to ensure a tight seal during valve operation and prevent medium leakage.

[0024] In summary, the utility model has the following beneficial effects:

[0025] 1. The utility model discloses a sealing raw material belt and self-locking sealing bolt combination design, and the two ports of the valve body form a double sealing structure, which effectively improves the sealing effect, can maintain long-term stable sealing performance in high-pressure or corrosive medium environment, and avoids leakage risk. The valve can be operated for a long time under extreme working conditions without losing the sealing function, prolonging the service life and improving the applicability of the product.

[0026] 2. The utility model discloses a self-locking sealing bolt, which not only provides a sealing function, but also prevents the valve ball from changing state due to external vibration or misoperation through its locking property, thereby avoiding leakage. During construction, the installer can tighten the self-locking sealing bolt to extrude the bevel pad and stop the leakage in time, avoiding property loss. Meanwhile, the self-locking sealing bolt can also slow down the wear rate of the sealing raw material belt, prolong the service life of the sealing system, reduce the maintenance frequency and replacement cost.

[0027] 3. The utility model discloses a detachable connection at the second port, which can conveniently replace or clean the sealing raw material belt through internal and external thread cooperation, reduces the disassembly complexity, improves the maintenance efficiency, and ensures long-term sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structure diagram of a self-locking sealing ball valve of a preferred embodiment.

[0029] Figure 2is a sectional structure schematic view of a self-locking sealing ball valve of a preferred embodiment;

[0030] Figure 3 is a structure schematic view of a valve ball;

[0031] Figure 4 is a sectional view of a self-locking sealing ball valve of a preferred embodiment;

[0032] Figure 5 is a structure schematic view of a self-locking sealing ball valve of a preferred embodiment.

[0033] Reference signs, 1, valve body; 1-1, first port; 1-2, second port; 1-3, second valve seat;

[0034] 2, valve rod; 2-1, limiting block;

[0035] 3, handle; 3-1, limiting part;

[0036] 4, valve ball; 4-1, valve ball channel; 4-2, sealing ring;

[0037] 5, sealing raw material belt; 5-1, first sealing raw material belt; 5-2, second sealing raw material belt; 5-2-1, first valve seat;

[0038] 6, self-locking sealing bolt; 7, bevel washer. DETAILED DESCRIPTION

[0039] The preferred embodiment of the utility model is described in detail below in combination with the drawings.

[0040] As Figures 1-5 shown, a self-locking sealing ball valve of a preferred embodiment comprises a valve body 1, a valve rod 2 and a handle 3, the valve body 1 is internally provided with a valve ball 4, the valve ball 4 and the handle 3 are connected through the valve rod 2, the valve ball 4 is internally provided with a valve ball channel 4-1, the valve rod 2 is driven by twisting the handle 3, and then the valve ball 4 is twisted, the valve ball channel 4-1 is controlled to rotate, and the opening and closing of the valve body 1 are realized; both ends of the valve body 1 are connected with sealing raw material belts 5, and the sealing raw material belts 5 are sleeved with self-locking sealing bolts 6.

[0041] The valve body 1 comprises a first port 1-1 and a second port 1-2, and the sealing raw material belt 5 comprises a first sealing raw material belt 5-1 and a second sealing raw material belt 5-2, the first port 1-1 is fixedly connected with the first sealing raw material belt 5-1, and the second port 1-2 is detachably connected with the second sealing raw material belt 5-2. The second port 1-2 forms an internal thread, the second sealing raw material belt 5-2 forms an external thread, and the internal thread and the external thread are matched. The second sealing raw material belt 5-2 is provided with a first valve seat 5-2-1, the valve body 1 is internally provided with a second valve seat 1-3, and the valve ball 4 is arranged between the first valve seat 5-2-1 and the second valve seat 1-3. The valve ball 4 is provided with a sealing surface 4-2 between the first valve seat 5-2-1 and the second valve seat 1-3.

[0042] The handle 3 forms a limiting portion 3-1, and the valve rod 2 is provided with a limiting block 2-1, which is matched with the limiting portion 3-1.

[0043] The valve body 1 is sleeved with an angle pad 7 at both ends, and the angle pad 7 is located outside the self-locking sealing bolt 6. The material of the sealing raw material belt 5 is polytetrafluoroethylene. The material of the self-locking sealing bolt 6 is silicone rubber or nitrile rubber.

[0044] The valve body 1 is the main structure of the valve, and the valve ball 4 is arranged in the valve body. The valve ball is provided with a valve ball channel 4-1, and the direction of the channel is connected with the flow channel of the valve body. By rotating the handle 3, the valve rod 2 drives the valve ball 4 to rotate, so as to realize the alignment or misalignment of the valve ball channel 4-1, and control whether the fluid can flow through the valve body 1. The valve body 1 is connected with the sealing raw material belt 5 at both ports, and is sleeved with the self-locking sealing bolt 6. The sealing raw material belt 5 forms a preliminary seal with the contact surface of the valve body port through the softness, so as to prevent the medium from leaking. The self-locking sealing bolt 6 can provide a stronger locking effect under external force, so as to further enhance the sealing performance and prevent leakage and misoperation.

[0045] The first port 1-1 of the valve body 1 is connected with the first sealing raw material belt 5-1 in a fixed connection mode. The second port 1-2 is matched with the second sealing raw material belt 5-2 through internal and external threads, can be quickly disassembled and replaced, ensures the sealing effect and is convenient to maintain. The second sealing raw material belt 5-2 is internally provided with a valve seat 5-2-1, and the valve body is internally provided with a second valve seat 1-3. The valve ball 4 is located between the two valve seats, forms a sealing surface 4-2 through contact with the valve seat, and prevents the medium from leaking.

[0046] The handle 3 is matched with the limiting block 2-1 on the valve rod 2 through the limiting portion 3-1. The limiting block limits the rotation angle of the handle, ensures that the valve rod 2 stays at a predetermined position when being completely opened or closed, and avoids the valve ball 4 from being stuck or the valve from being invalid due to excessive rotation.

[0047] The contact surfaces at both ends of the valve body 1 are sleeved with bevel washers 7, which are located outside the self-locking sealing bolts 6, and can adapt to the deformation of the pipeline port and improve the sealing effect of the contact surface. The bevel washers 7 can also disperse the pressure generated by the high-pressure medium to prevent damage to the sealing gasket. During construction, if the installer forgets to wrap the raw material belt or uses less raw material belt due to misoperation, leakage may occur. The person who discovers it can tighten the self-locking sealing bolts to extrude the bevel, which can timely stop the leakage and avoid property loss.

[0048] The sealing raw material belt 5 is made of polytetrafluoroethylene (PTFE) material, which has chemical corrosion resistance, low friction coefficient and good sealing performance, and is suitable for various harsh working environments. The self-locking sealing bolts 6 can be made of silicone rubber or nitrile rubber, which has good elasticity, high temperature resistance and corrosion resistance, and can cope with high temperature or corrosive medium working environment.

[0049] During use, the user rotates the control valve ball 4 through the handle 3. When the handle 3 is rotated, the valve stem 2 drives the valve ball 4 to rotate, and the valve ball passage 4-1 is aligned or offset with the rotation of the valve ball 4, thereby controlling the on-off of the valve body 1.

[0050] The sealing raw material belt 5 and the self-locking sealing bolt 6 work together to form a double-sealing structure, ensuring that the valve works stably for a long time in a high-pressure or corrosive medium environment.

[0051] The fixed connection of the first port 1-1 and the first sealing raw material belt 5-1 ensures that the sealing is not affected by external vibration or frequent operation. The detachable connection design of the second port 1-2 and the second sealing raw material belt 5-2 makes the valve more convenient to maintain, and the user can quickly replace the sealing belt.

[0052] In a high-pressure environment, the bevel washer 7 and the self-locking sealing bolt 6 work together to withstand a large pressure and vibration, avoiding sealing failure caused by high pressure or vibration. The use of polytetrafluoroethylene material ensures the long-term stability of the sealing raw material belt in various corrosive media.

[0053] Through the cooperation of the limiting block 2-1 and the limiting part 3-1, the rotation of the handle 3 is accurately limited, ensuring that the valve ball 4 is in the predetermined position of being fully opened or fully closed, reducing damage caused by overloading of the valve stem 2, and ensuring the safety and accuracy of the operation.

[0054] The above embodiments are only an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A self-sealing ball valve, characterized in that, Including valve body (1), valve stem (2) and handle (3), the valve body (1) is provided with valve ball (4) inside, the valve ball (4) and handle (3) are connected through valve stem (2), the valve ball (4) is provided with valve ball passage (4-1) inside, by twisting handle (3) drives valve stem (2), and then drives valve ball (4) to twist, controls valve ball passage (4-1) rotation, realizes the open-close of valve body (1);Both ends of the valve body (1) are connected with sealing raw material belt (5), and the sealing raw material belt (5) is sleeved with self-locking sealing bolt (6).

2. The self-sealing ball valve of claim 1, wherein, Both ends of the valve body (1) are sleeved with bevel gasket (7), and the bevel gasket (7) is located outside the self-locking sealing bolt (6).

3. The self-sealing ball valve of claim 2, wherein, The valve body (1) includes first port (1-1) and second port (1-2), the sealing raw material belt (5) includes first sealing raw material belt (5-1) and second sealing raw material belt (5-2), the first port (1-1) is fixedly connected with the first sealing raw material belt (5-1), and the second port (1-2) is detachably connected with the second sealing raw material belt (5-2).

4. The self-sealing ball valve of claim 3, wherein, The second port (1-2) is formed with internal thread, and the second sealing raw material belt (5-2) is formed with external thread, and the internal thread and the external thread are matched.

5. The self-sealing ball valve of claim 4, wherein, The second sealing raw material belt (5-2) is provided with first valve seat (5-2-1), and the valve body (1) is provided with second valve seat (1-3) inside, and the valve ball (4) is arranged between the first valve seat (5-2-1) and the second valve seat (1-3).

6. The self-sealing ball valve of claim 5, wherein, The valve ball (4) is provided with sealing surface (4-2) between the first valve seat (5-2-1) and the second valve seat (1-3).

7. The self-packing ball valve according to claim 1, wherein The handle (3) is formed with limiting portion (3-1), and the valve stem (2) is provided with limiting block (2-1), and the limiting block (2-1) is matched with the limiting portion (3-1).

8. The self-sealing ball valve according to any one of claims 1-6, characterized in that The material of the sealing raw material belt (5) is polytetrafluoroethylene.

9. The self-sealing ball valve according to any one of claims 1-6, characterized in that The material of the self-locking sealing bolt (6) is silicone rubber or nitrile rubber.

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