A low torque, leak-proof valve

Abstract

The utility model relates to a low torque, anti -leakage's valve, include: first valve body, second valve body is equipped with the fluid passageway that penetrates to the inside of first valve body, valve core is used for opening or cutting off fluid passageway, and the inner diameter of through -hole that is equipped with penetrates on valve core is same with the inner diameter of fluid passageway, valve rod is connected with valve core in one end, sealing ring is provided as at least one, and sealing ring is sleeved on the outer wall of valve rod, and sealing ring is used for sealing between valve rod and valve cover, and the material of sealing ring is perfluorinated ether rubber. The low torque, anti -leakage's valve of the utility model effectively reduces the valve failure and handle deformation problem caused by excessive torque, prolongs the service life of valve, reduces equipment maintenance cost, improves production efficiency, adopts perfluorinated ether and high fluorine O -ring material and integral type ball valve body, solves the shaft end external leakage and structural leakage hidden danger thoroughly, avoids crystallization material blockage problem, guarantees module cleanliness, improves production safety.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a low-torque, leak-proof valve. Background Technology

[0002] Valves are essential devices for transporting fluids, especially in the transport of flammable, explosive, toxic, and hazardous media. Strict requirements are placed on the sealing performance and strength of valves due to safety and reliability considerations. Ball valves are widely used because of their advantages: small size, the ability to open and close with only a 90-degree turn of the handle, time-saving and labor-saving operation, and reliable sealing.

[0003] In industrial production, valves are generally designed with a torque of around 25 Nm and often employ a reduced-bore structure. In conditions containing silica or easily crystallizing substances, silica or crystals can easily accumulate inside the valve, leading to a significant increase in valve torque. This can cause valve failure, handle deformation, and other problems, severely impacting production continuity and equipment safety. Simultaneously, existing valves commonly exhibit external leakage at the shaft end. This is primarily because the valve's O-ring material cannot withstand fluorinated organic substances for extended periods. External leakage not only affects module cleanliness but also causes temperature increases at the leakage point, leading to crystal formation, clogging valves and pipelines, and increasing maintenance costs and safety hazards. Furthermore, the commonly used three-piece ball valves in the field, due to their structure, have numerous potential leakage points, which is another major reason for the frequent external leakage. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problems of valve failure due to high torque, external leakage at the shaft end, and multiple leakage hazards in the structure of three-piece ball valves in the prior art, and to improve the performance and reliability of valves in the case of fluorinated organic substances.

[0005] To solve the above-mentioned technical problems, this utility model provides a low-torque, leak-proof valve, comprising: a first valve body; a second valve body, which is connected to the first valve body to form an integral valve body, wherein the second valve body and the first valve body have a through fluid channel; a valve core, which is disposed in the fluid channel of the second valve body and the first valve body, and the valve core is used to open or cut off the fluid channel, the valve core is spherical, and the valve core has a through hole, the through hole is a circular through hole, and the inner diameter of the through hole is the same as the inner diameter of the fluid channel; a valve stem, one end of which is connected to the valve core, and the other end of the valve stem extends out of the second valve body; a valve cover, which is installed on the second valve body, and the valve stem passes through the valve cover; and a sealing ring, which is provided at least one, the sealing ring is sleeved on the outer wall of the valve stem, and the sealing ring is used to seal between the valve stem and the valve cover, the sealing ring being made of polyvinylidene fluoride rubber.

[0006] In one embodiment of this utility model, the sealing ring is an O-ring, and the number of sealing rings is set to two.

[0007] In one embodiment of this utility model, valve seats are provided on both the first valve body and the second valve body, the valve core is sealed and fitted with the valve seat, and valve seat sealing rings are provided between the valve seat and the first valve body and the second valve body, the valve seat sealing rings being used for sealing between the first valve body, the second valve body and the valve seat.

[0008] In one embodiment of the present invention, a first groove is provided on the inner wall of the valve cover, and a filler is provided in the first groove, the filler filling the space between the valve stem and the valve cover.

[0009] In one embodiment of this utility model, the valve cover is provided with a packing block and a fixing block. The packing block is used to compress the packing, and the fixing block is locked to the valve cover by screws. The fixing block is also used to lock the packing block on the valve cover.

[0010] In one embodiment of this utility model, the valve stem passes through the packing block, and a handle is connected to the end of the valve stem extending out of the packing block. The handle drives the valve core to rotate through the valve stem.

[0011] In one embodiment of this utility model, a recessed second groove is provided on the end face of the fixing block opposite to the handle.

[0012] In one embodiment of the present invention, the handle is provided with a self-locking ring and an inclined bending portion. The self-locking ring is fitted onto the bending portion and can move along the bending portion. The self-locking ring is provided with a self-locking protrusion, which is placed in a second groove to achieve self-locking of the handle.

[0013] In one embodiment of the present invention, the end face of the fixing block opposite to the handle is provided with a first limiting boss and a second limiting boss, and the first limiting boss and the second limiting boss are on the same circumference.

[0014] In one embodiment of the present invention, the handle is provided with a limiting protrusion, which is located in an arcuate range between a first limiting protrusion and a second limiting protrusion. The first limiting protrusion and the second limiting protrusion are used to limit the rotation position of the handle.

[0015] Compared with the prior art, the low-torque, leak-proof valve of this utility model has the following advantages:

[0016] 1. Low torque advantage: Valve torque is reduced to below 6Nm, effectively reducing valve failure and handle deformation caused by excessive torque, extending valve service life, reducing equipment maintenance costs, and improving production efficiency.

[0017] 2. Leakage prevention effect: The use of high-fluorine O-ring materials such as polyvinylidene fluoride and an integrated ball valve body provides double protection from both material and structural aspects, completely solving the hidden dangers of external leakage at the shaft end and structural leakage, avoiding the problem of crystal blockage, ensuring module cleanliness, and improving production safety.

[0018] 3. Improved user experience: The optimized handle structure and operation identification design make valve operation more convenient and safer, reduce the risk of operator misoperation, and improve work efficiency. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of a low-torque, leak-proof valve in a preferred embodiment of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of a low-torque, leak-proof valve in a preferred embodiment of the present invention. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the structure of a low-torque, leak-proof valve in a preferred embodiment of the present invention. Figure 3 ;

[0023] Figure 4 This is a top view of a low-torque, leak-proof valve in a preferred embodiment of the present invention;

[0024] Figure 5 This is a left view of a low-torque, leak-proof valve in a preferred embodiment of the present invention.

[0025] Figure 6 This is a preferred embodiment of the present invention. Figure 5 Cross-sectional view along the AA direction.

[0026] Explanation of reference numerals in the accompanying drawings: First valve body 1, Second valve body 2, Valve core 3, Through hole 31, Valve stem 4, Valve cover 5, First groove 51, Packing 52, Packing block 53, Fixing block 54, Second groove 541, First limiting boss 542, Second limiting boss 543, Sealing ring 6, Valve seat 7, Valve seat sealing ring 71, Handle 8, Self-locking ring 81, Self-locking protrusion 811, Bending part 82, Limiting protrusion 83. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0028] Reference Figure 1-6 As shown, the low-torque, leak-proof valve of this utility model includes: a first valve body 1; a second valve body 2, which is connected to the first valve body 1 to form an integral valve body, wherein the second valve body 2 and the first valve body 1 have a through fluid channel; a valve core 3, which is disposed in the fluid channel of the second valve body 2 and the first valve body 1, and the valve core 3 is used to open or cut off the fluid channel, the valve core 3 is spherical, and the valve core 3 has a through hole 31, the through hole 31 is a circular through hole, and the inner diameter of the through hole 31 is the same as the inner diameter of the fluid channel; a valve stem 4, one end of which is connected to the valve core 3, and the other end of the valve stem 4 extends out of the second valve body 2; a valve cover 5, which is installed on the second valve body 2, and the valve stem 4 passes through the valve cover 5; and a sealing ring 6, which is provided at least once, the sealing ring 6 is sleeved on the outer wall of the valve stem 4, and the sealing ring 6 is used to seal between the valve stem 4 and the valve cover 5, the sealing ring 6 being made of polyvinylidene fluoride rubber. The through-hole 31 on the valve core 3, which supplies the medium flow, has the same inner diameter as the fluid channel, forming a through-bore structure. The flow channel diameter of the through-bore ball valve is the same as the inner diameter of the pipe. When the ball moves along the pipe axis, the water flow is completely unobstructed, without generating fluid resistance or additional pressure drop. Specifically, when the inner diameter of the valve ball is less than or equal to the inner diameter of the ball valve port (85), it is called a reduced-bore ball valve; when the inner diameter of the ball valve is greater than the inner diameter of the ball valve port (95), it is called a full-bore ball valve. Because of its low fluid resistance, the through-bore ball valve has virtually no flow resistance, thus preventing the accumulation of silica or crystals that could increase torque.

[0029] Preferably, the sealing ring 6 is an O-ring, and the number of sealing rings 6 is set to two. The installation structure of the sealing ring 6 is that an annular groove is provided on the outer wall of the valve stem 4, and the sealing ring 6 is installed in the annular groove of the valve stem 4.

[0030] In the above structure, valve seats 7 are provided on both the first valve body 1 and the second valve body 2. The valve core 3 is sealed and fitted with the valve seat 7. A valve seat sealing ring 71 is provided between the valve seat 7 and the first valve body 1 and the second valve body 2. The valve seat sealing ring 71 is used to seal between the first valve body 1 and the second valve body 2 and the valve seat 7.

[0031] In the above structure, a first groove 51 is provided on the inner wall of the valve cover 5, and a packing 52 is provided in the first groove 51. The packing 52 fills the space between the valve stem 4 and the valve cover 5. The valve cover 5 is provided with a packing block 53 and a fixing block 54. The packing block 53 is used to compress the packing 52, and the fixing block 54 is locked to the valve cover 5 by screws, and the fixing block 54 is used to lock the packing block 53 on the valve cover 5.

[0032] In the above structure, the valve stem 4 passes through the packing block 53, and the end of the valve stem 4 extending out of the packing block 53 is connected to a handle 8. The handle 8 drives the valve core 3 to rotate through the valve stem 4. The fixed block 54 has a recessed second groove 541 on its end face opposite to the handle 8. The handle 8 is provided with a self-locking ring 81 and an inclined bending portion 82. The self-locking ring 81 is fitted onto the bending portion 82 and can move along the bending portion 82. The self-locking ring 81 is provided with a self-locking protrusion 811, which is placed in the second groove 541 to achieve self-locking of the handle 8. The self-locking principle is as follows: When self-locked, the self-locking protrusion 811 is rotated above the second groove 541, and the self-locking ring 81 slides down along the inclined bend 82 under the action of gravity, so that the self-locking protrusion 811 is placed in the second groove 541. Since the second groove 541 restricts the self-locking protrusion 811, the handle 8 cannot be moved left or right. When unlocking, the self-locking ring 81 is slid upward along the inclined bend 82, and the self-locking protrusion 811 moves out of the second groove 541. In this way, the self-locking protrusion 811 disengages from the second groove 541, and the handle 8 can be rotated.

[0033] In the above structure, the fixing block 54 has a first limiting protrusion 542 and a second limiting protrusion 543 on its end face opposite to the handle 8. The first limiting protrusion 542 and the second limiting protrusion 543 are located on the same circumference. The handle 8 has a limiting protrusion 83 located within the arcuate range between the first limiting protrusion 542 and the second limiting protrusion 543. The first limiting protrusion 542 and the second limiting protrusion 543 are used to limit the rotational position of the handle 8. Preferably, the first limiting protrusion 542 and the second limiting protrusion 543 are located at the two ends of a 90° arc, so that the rotation angle of the handle 8 is limited to 90° by the first limiting protrusion 542 and the second limiting protrusion 543.

[0034] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A low-torque, leak-proof valve, characterized in that, include: First valve body; The second valve body is connected to the first valve body to form an integral valve body, and the interior of the second valve body and the first valve body are provided with through fluid channels; A valve core is disposed within the fluid passage of the second valve body and the first valve body, and the valve core is used to open or cut off the fluid passage. The valve core is spherical and has a through hole. The through hole is circular and the inner diameter of the through hole is the same as the inner diameter of the fluid passage. A valve stem, one end of which is connected to the valve core, and the other end of which extends into a second valve body; A valve cover, which is mounted on a second valve body, through which the valve stem passes; A sealing ring, comprising at least one, is fitted onto the outer wall of the valve stem and serves to seal between the valve stem and the valve cover. The sealing ring is made of polyvinylidene fluoride rubber.

2. The low-torque, leak-proof valve according to claim 1, characterized in that: The sealing ring is an O-ring, and the number of sealing rings is set to two.

3. The low-torque, leak-proof valve according to claim 1, characterized in that: Both the first valve body and the second valve body are provided with valve seats. The valve core is sealed and fitted with the valve seat. A valve seat sealing ring is provided between the valve seat and the first valve body and the second valve body. The valve seat sealing ring is used to seal between the first valve body, the second valve body and the valve seat.

4. The low-torque, leak-proof valve according to claim 1, characterized in that: The valve cover has a first groove on its inner wall, and the first groove contains filler material, which fills the space between the valve stem and the valve cover.

5. The low-torque, leak-proof valve according to claim 4, characterized in that: The valve cover is provided with a packing block and a fixing block. The packing block is used to compress the packing, and the fixing block is locked to the valve cover by screws. The fixing block is also used to lock the packing block on the valve cover.

6. The low-torque, leak-proof valve according to claim 5, characterized in that: The valve stem passes through the packing block, and a handle is connected to the end of the valve stem extending out of the packing block. The handle drives the valve core to rotate through the valve stem.

7. The low-torque, leak-proof valve according to claim 6, characterized in that: The fixed block has a recessed second groove on the end face opposite to the handle.

8. The low-torque, leak-proof valve according to claim 7, characterized in that: The handle is provided with a self-locking ring and an inclined bending part. The self-locking ring is fitted onto the bending part and can move along the bending part. The self-locking ring is provided with a self-locking protrusion, which is placed in a second groove to achieve self-locking of the handle.

9. The low-torque, leak-proof valve according to claim 6, characterized in that: The fixed block has a first limiting boss and a second limiting boss on its end face opposite to the handle, and the first limiting boss and the second limiting boss are on the same circumference.

10. The low-torque, leak-proof valve according to claim 9, characterized in that: The handle is provided with a limiting protrusion, which is located in an arc-shaped range between the first limiting protrusion and the second limiting protrusion. The first limiting protrusion and the second limiting protrusion are used to limit the rotation position of the handle.

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