Ultra-low temperature soft-seal ball valve

Abstract

The utility model discloses a super low temperature soft seal ball valve, including the valve body, the one side of valve body is provided with the valve cover, the other side threaded connection of valve cover has flange no.

Description

Technical Field

[0001] This utility model relates to the field of sealing ball valve technology, specifically to an ultra-low temperature soft-seal ball valve. Background Technology

[0002] In valves, a ball valve is a type of valve whose opening and closing element is a ball, which is driven by the valve stem and rotates around the axis of the valve stem. Due to its compact structure, ease of operation and maintenance, ball valves are widely used in the control of general fluid media.

[0003] Patent CN114060556A discloses a cryogenic soft-seal ball valve, comprising: a valve body having a valve cavity, an installation channel communicating with the valve cavity on the valve body, and a ball with a through hole movably disposed within the valve cavity; a valve stem rotatably inserted into the installation channel, and the valve stem engaging with the ball; two valve seats symmetrically disposed on both sides of the valve cavity, the valve seats being located between the ball and the valve body; wherein, at least one valve seat and the valve body are provided with a first elastic compensation component, the first elastic compensation component acting on the valve seat to maintain a pre-tight seal between the valve seat and the ball.

[0004] Currently, in traditional cryogenic soft-seal ball valves, friction occurs between the valve core and the valve seat during opening and closing. Due to long-term and frequent operation, the sealing surface will gradually wear down, resulting in poor sealing performance or even failure of the valve core, thus reducing the life of the valve core. In addition, the common sealing structure is a circular sealing gasket, which has a single effect and poor sealing performance. Utility Model Content

[0005] The purpose of this utility model is to provide an ultra-low temperature soft-seal ball valve to solve the problem mentioned in the background art that friction occurs between the valve core and the valve seat during the opening and closing process of the ultra-low temperature soft-seal ball valve. Due to long-term and frequent operation, the sealing joint surface will gradually wear down, resulting in poor sealing performance or even failure of the valve core, thereby reducing the life of the valve core. In addition, the common sealing structure is a circular sealing gasket, which has a single effect and poor sealing effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cryogenic soft-seal ball valve, comprising a valve body, a valve cover provided on one side of the valve body, a flange one threadedly connected to the other side of the valve cover, a flange two bolted to one side of the flange one, a sealing mechanism snapped onto the side of the flange two near the flange one, a valve stem rotatably connected to the middle part of the valve body, a handle fixedly connected to the upper end of the valve stem, a limit mechanism sealingly connected to both sides of the inner wall of the valve body, and a valve core inserted into the lower end of the valve stem;

[0007] The sealing mechanism includes an installation groove, the outer wall of which is embedded and connected to one side of flange two. A slot is provided on the other side of the installation groove. A sleeve is provided on the inner wall of the slot. A receiving cavity is embedded and connected to the inner wall of the sleeve. Spring one is fixedly connected to both sides of the inner wall of the receiving cavity. A rubber ring is fixedly connected to the side of the two sleeves that are close to each other.

[0008] Preferably, one side of the valve cover is threaded to one side of the valve body, and one side of the flange is threaded to one side of the valve cover.

[0009] Preferably, the other side of the mounting groove is embedded and connected to one side of the card slot, and the inner wall of the card slot is in close contact with the outer wall of the card sleeve.

[0010] Preferably, the mounting grooves are respectively disposed between flange one and flange two and are matched with the rubber ring.

[0011] Preferably, the limiting mechanism includes a valve seat, one side of which is sealed to one side of the inner wall of the valve body, and the other side of the valve seat is provided with an annular groove. A spring is provided on one side of the inner wall of the annular groove, and limiting blocks are fixedly connected to the top and bottom of the inner wall of the annular groove.

[0012] Preferably, one side of the valve seat is embedded and connected to the outer wall of the annular groove, and one side of the inner wall of the annular groove is fixedly connected to one side of the second spring.

[0013] Preferably, the number of springs two is eight, and they are all distributed in a ring at equal intervals on one side of the inner wall of the annular groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The sealing mechanism enables the equipment to maintain good sealing performance in ultra-low temperature environments, effectively preventing media leakage. The rubber ring has good elasticity and low temperature resistance, and can remain soft at extremely low temperatures, tightly fitting the flange connection to form a reliable seal. At the same time, the spring allows the rubber ring to have a certain amount of compression in the mounting groove, further enhancing the sealing effect. During use, the rubber ring can adapt to pressure changes with the flow rate, always maintaining a tight seal, thereby extending the service life of the valve core.

[0016] 2. The limiting mechanism reduces friction and wear between the valve core and valve seat during opening and closing, improving valve stability and durability. The valve seat is sealed to the inner wall of the valve body, ensuring no leakage of the medium. The spring and limiting block in the annular groove work together to limit and buffer the valve core, making its rotation smoother and reducing impact on the valve seat. This design not only improves the valve's sealing performance but also extends its service life, making it particularly suitable for fluid media control in cryogenic environments. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the sealing mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the limiting mechanism of this utility model;

[0020] Figure 4 This is a side-view exploded schematic diagram of the three-dimensional structure of this utility model.

[0021] In the diagram: 1. Valve body; 2. Valve cover; 3. Flange 1; 4. Flange 2; 5. Sealing mechanism; 6. Valve stem; 7. Handle; 8. Limiting mechanism; 9. Valve core; 51. Mounting groove; 52. Slot; 53. Sleeve; 54. Receiving cavity; 55. Spring 1; 56. Rubber ring; 81. Valve seat; 92. Annular groove; 93. Spring 2; 94. Limiting block. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1 and Figure 4This utility model provides a technical solution: an ultra-low temperature soft-seal ball valve, including a valve body 1, a valve cover 2 on one side of the valve body 1, a flange 3 threadedly connected to the other side of the valve cover 2, a flange 4 bolted to one side of the flange 3, a sealing mechanism 5 snapped onto the side of the flange 4 near the flange 3, a valve stem 6 rotatably connected to the middle part of the valve body 1, a handle 7 fixedly connected to the upper end of the valve stem 6, limit mechanisms 8 sealingly connected to both sides of the inner wall of the valve body 1, and a valve core 9 inserted into the lower end of the valve stem 6 for sealing. Mechanism 5 includes a mounting groove 51, the outer wall of which is embedded and connected to one side of flange 4. A slot 52 is provided on the other side of the mounting groove 51. A sleeve 53 is provided on the inner wall of the slot 52. A receiving cavity 54 is embedded and connected to the inner wall of the sleeve 53. Springs 55 are fixed to both sides of the inner wall of the receiving cavity 54. A rubber ring 56 is fixed to the side of the two sleeves 53 that are close to each other. One side of valve cover 2 is threadedly connected to one side of valve body 1. One side of flange 3 is threadedly connected to one side of valve cover 2.

[0024] A valve cover 2 is provided on one side of the valve body 1. On the other side of the valve cover 2, a flange 3 is fixed by a threaded connection. The other side of flange 3 is connected to flange 4 by bolting. On the side of flange 4 close to flange 3, a sealing mechanism 5 is fixed by snap-fit. A valve stem 6 is provided in the middle of the valve body 1. The upper end of the valve stem 6 is fixedly connected to a handle 7 for easy operation. On both sides of the inner wall of the valve body 1, a sealing connection limiting mechanism 8 is provided to ensure the sealing performance of the ball valve. The lower end of the valve stem 6 is inserted into and connected to the valve core 9 to realize the opening and closing function of the ball valve.

[0025] Please see Figure 2 In order to quickly seal the flange 4 on flange 3, the other side of the mounting groove 51 is embedded and connected to one side of the slot 52. The inner wall of the slot 52 is in close contact with the outer wall of the sleeve 53. The mounting groove 51 is respectively set between flange 3 and flange 4 and matches the rubber ring 56.

[0026] The outer wall of the mounting groove 51 is fixed to one side of the flange 4 by an embedded connection. On the other side of the mounting groove 51, a slot 52 is provided. The inner wall of the slot 52 is provided with a sleeve 53. The inner wall of the sleeve 53 is embedded with a receiving cavity 54. Spring 55 is fixed to both sides of the inner wall of the receiving cavity 54. A rubber ring 56 is fixed to the side of the two sleeves 53 that are close to each other to enhance the sealing effect. One side of the valve cover 2 is fixed to one side of the valve body 1 by a threaded connection. One side of the flange 3 is fixed to one side of the valve cover 2 by a threaded connection. This configuration enables the ball valve to maintain good sealing performance in ultra-low temperature environments, ensuring its reliability and stability under extreme conditions.

[0027] Please see Figure 3In order to quickly fix the valve core 9 inside the valve body 1, the limiting mechanism 8 includes a valve seat 81. One side of the valve seat 81 is sealed to one side of the inner wall of the valve body 1. The other side of the valve seat 81 is provided with an annular groove 92. A spring 93 is provided on one side of the inner wall of the annular groove 92. Limiting blocks 94 are fixedly connected to the top and bottom of the inner wall of the annular groove 92. One side of the valve seat 81 is embedded and connected to the outer wall of the annular groove 92. One side of the inner wall of the annular groove 92 is fixedly connected to one side of the spring 93. The number of springs 93 is eight and they are all distributed in an annular shape at equal intervals on one side of the inner wall of the annular groove 92.

[0028] To achieve a fast and stable fixation of the valve core 9 within the valve body 1, one end of the valve seat 81 is tightly connected to the inner wall of the valve body 1 to ensure a sealing effect. At the other end of the valve seat 81, an annular groove 92 is provided. Limiting blocks 94 are fixedly installed at the top and bottom positions on the inner wall of this annular groove 92. One end of the valve seat 81 is embedded in the outer wall of the annular groove 92 to ensure a tight fit. Another end of the inner wall of the annular groove 92 is connected to eight springs 93, which are evenly distributed on the inner wall of the annular groove 92. The valve core 9 is arranged in a ring structure to ensure that the spring 93 can apply force evenly, thereby achieving stable limiting of the valve core 9. In use, the user rotates the handle 7, which drives the valve stem 6 to rotate. The valve stem 6 drives the valve core 9 to rotate within the valve body 1. When the valve core 9 rotates 90 degrees, it opens, allowing the medium to flow in from one end of the valve body 1 and out from the other. To close the valve core 9, the user rotates the handle 7 in the opposite direction, causing the valve stem 6 to rotate in the opposite direction. The valve stem 6 then drives the valve core 9 to rotate 90 degrees in the opposite direction, closing the valve core 9 and stopping the flow of the medium. This is necessary when adjusting flanges 3 and 2. When sealing between flanges 4 and 3, the user pushes flange 2 (4) towards flange 3. Flange 2 (4) moves the sealing mechanism 5 towards flange 3 until the rubber ring 56 is tightly pressed against one side of flange 3. At this time, the ferrule 53 is compressed, causing the receiving cavity 54 to contract. The receiving cavity 54 then causes the spring 55 to contract. When the rubber ring 56 is tightly pressed against flange 3, the spring 55, due to its elastic potential energy, causes the receiving cavity 54 to return to its original position. The receiving cavity 54 then causes the ferrule 53 to return to its original position, and the ferrule 53 causes the rubber ring 56 to clamp flange 3. After sealing between flange 3 and flange 4 is completed, when it is necessary to limit the valve core 9, the user inserts the valve core 9 into the valve body 1. At this time, the valve core 9 drives the annular groove 92 to move to one side of the valve seat 81. The annular groove 92 drives the spring 93 and the limiting block 94 to move. When the limiting block 94 contacts the inner wall of the valve body 1, the spring 93 is compressed and contracts. When the valve core 9 rotates 90 degrees, the spring 93 drives the annular groove 92 and the limiting block 94 to reset due to its own elastic potential energy. At this time, the limiting block 94 limits the valve core 9 to prevent the valve core 9 from deviating.

[0029] Working principle: First, a valve cover 2 is installed on one side of the valve body 1. On the other side of the valve cover 2, a flange 3 is fixed by a threaded connection. The other side of flange 3 is connected to flange 4 by bolting. On the side of flange 4 closest to flange 3, a sealing mechanism 5 is fixed by a snap-fit. In the middle of the valve body 1, a rotatable valve stem 6 is installed. The upper end of the valve stem 6 is fixedly connected to a handle 7 for operation. On both sides of the inner wall of the valve body 1, sealing limiting mechanisms 8 are installed to ensure the sealing performance of the ball valve. The lower end of the valve stem 6 is inserted into and connected to the valve core 9 to realize the opening and closing function of the ball valve. The mounting groove 51... The outer wall is fixed to one side of flange 2 4 by an embedded connection. A slot 52 is provided on the other side of the mounting groove 51. A sleeve 53 is provided on the inner wall of the slot 52. A receiving cavity 54 is embedded in the inner wall of the sleeve 53. Spring 1 55 is fixed on both sides of the inner wall of the receiving cavity 54. A rubber ring 56 is fixed on the side of the two sleeves 53 that are close to each other to enhance the sealing effect. One side of valve cover 2 is fixed to one side of valve body 1 by a threaded connection. One side of flange 1 3 is fixed to one side of valve cover 2 by a threaded connection. This setting enables the ball valve to maintain good sealing performance in ultra-low temperature environment, ensuring its reliability and stability under extreme conditions.

[0030] To achieve a fast and stable fixation of the valve core 9 within the valve body 1, one end of the valve seat 81 is tightly connected to the inner wall of the valve body 1 to ensure a sealing effect. At the other end of the valve seat 81, an annular groove 92 is provided. Limiting blocks 94 are fixedly installed at the top and bottom positions on the inner wall of this annular groove 92. One end of the valve seat 81 is embedded in the outer wall of the annular groove 92 to ensure a tight fit. Another end of the inner wall of the annular groove 92 is connected to a second spring 93. The number of springs 93 is set to eight, and they are evenly distributed on the inner wall of the annular groove 92, forming a ring structure. To ensure that spring 293 applies force evenly, thus achieving stable limiting of valve core 9, the user rotates handle 7. Handle 7 drives valve stem 6 to rotate, which in turn drives valve core 9 to rotate within valve body 1. When valve core 9 rotates 90 degrees, it opens, allowing the medium to flow in from one end of valve body 1 and out from the other. To close valve core 9, handle 7 is rotated in the opposite direction, causing valve stem 6 to rotate in the opposite direction, which in turn drives valve core 9 to rotate 90 degrees in the opposite direction, closing valve core 9 and stopping the flow of the medium. When sealing is required between flange 13 and flange 24, the user moves flange 24 towards flange 13. Pushing from one side, flange 2 4 moves the sealing mechanism 5 towards one side of flange 3 until the rubber ring 56 is tightly pressed against one side of flange 3. At this time, the ferrule 53 is compressed, and the ferrule 53 causes the receiving cavity 54 to contract. The receiving cavity 54 causes the spring 1 55 to contract. When the rubber ring 56 is tightly pressed against flange 3, the spring 1 55, due to its own elastic potential energy, causes the receiving cavity 54 to reset. The receiving cavity 54 causes the ferrule 53 to reset, and the ferrule 53 causes the rubber ring 56 to clamp flange 3. At this time, the seal between flange 3 and flange 2 4 is completed. When it is necessary to limit the valve core 9, the user will... When valve core 9 is inserted into valve body 1, valve core 9 moves annular groove 92 toward one side of valve seat 81. Annular groove 92 moves spring 93 and limit block 94. When limit block 94 contacts the inner wall of valve body 1, spring 93 is compressed and contracts. When valve core 9 rotates 90 degrees, spring 93, due to its elastic potential energy, moves annular groove 92 and limit block 94 back to their original positions. Limit block 94 then limits valve core 9 to prevent it from shifting. This is the entire working process of the device. Any content not described in detail in this specification is existing technology known to those skilled in the art.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Cryogenic soft-seal ball valve comprising a valve body (1), characterized in that: A valve cover (2) is provided on one side of the valve body (1), and a flange (3) is threadedly connected to the other side of the valve cover (2). A flange (4) is bolted to one side of the flange (3). A sealing mechanism (5) is snapped onto the side of the flange (4) near the flange (3). A valve stem (6) is rotatably connected to the middle part of the valve body (1). A handle (7) is fixed to the upper end of the valve stem (6). A limit mechanism (8) is sealed to both sides of the inner wall of the valve body (1). A valve core (9) is inserted into the lower end of the valve stem (6). The sealing mechanism (5) includes a mounting groove (51), the outer wall of which is embedded and connected to one side of the flange (4), and a slot (52) is provided on the other side of the mounting groove (51). A sleeve (53) is provided on the inner wall of the slot (52), and a receiving cavity (54) is embedded and connected to the inner wall of the sleeve (53). A spring (55) is fixedly connected to both sides of the inner wall of the receiving cavity (54), and a rubber ring (56) is fixedly connected to the side of the two sleeves (53) that are close to each other.

2. The ultra-low temperature soft-seal ball valve of claim 1, wherein: One side of the valve cover (2) is threaded to one side of the valve body (1), and one side of the flange (3) is threaded to one side of the valve cover (2).

3. The ultra-low temperature soft-seal ball valve of claim 1, wherein: The other side of the mounting groove (51) is embedded and connected to one side of the card slot (52), and the inner wall of the card slot (52) is in close contact with the outer wall of the card sleeve (53).

4. The ultra-low temperature soft-seal ball valve of claim 3, wherein: The mounting groove (51) is respectively located between flange one (3) and flange two (4) and matches the rubber ring (56).

5. The ultra-low temperature soft-seal ball valve of claim 1, wherein: The limiting mechanism (8) includes a valve seat (81), one side of which is sealed to one side of the inner wall of the valve body (1), and the other side of the valve seat (81) is provided with an annular groove (92). A spring (93) is provided on one side of the inner wall of the annular groove (92), and a limiting block (94) is fixedly connected to the top and bottom of the inner wall of the annular groove (92).

6. The ultra-low temperature soft-seal ball valve of claim 5, wherein: One side of the valve seat (81) is embedded and connected to the outer wall of the annular groove (92), and one side of the inner wall of the annular groove (92) is fixedly connected to one side of the second spring (93).

7. The cryogenic soft-seal ball valve according to claim 5, characterized in that: The number of springs (93) is set to eight, and they are all distributed in a ring at equal intervals on one side of the inner wall of the annular groove (92).

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