High-reliability sealing cryogenic ball valve

Abstract

The utility model discloses a high-reliability sealing cryogenic ball valve, and relates to the field of ball valves. The device comprises a ball valve body and a valve rod fixedly connected to the top end of the ball valve body, the two ends of the ball valve body are provided with a ball valve input end and a ball valve output end respectively, the ball valve input end and the ball valve output end are both fixedly connected with a middle sealing sleeve, the middle sealing sleeve comprises a sleeve body, and the two ends of the sleeve body are fixedly connected with fixing ring plates. The ball valve input end and the ball valve output end are each internally provided with an inner pipeline, the outer ends of the inner pipelines are fixedly connected with fixing ring blocks, and the outer ends of the inner pipelines are fixedly connected with sealing rubber inner gaskets. According to the device, the safety of the connecting position of the pipeline and the ball valve is improved, direct loss caused by damage to the connecting position of the pipeline and the ball valve is reduced, and the sealing degree of the connecting position of the pipeline and the ball valve is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field, concretely is a kind of high reliability sealing cryogenic ball valve. BACKGROUND

[0002] Cryogenic ball valve is a kind of ball valve that can keep high-performance sealing and stable work under extreme low temperature environment (usually below-196 ℃). It is widely used in petroleum, chemical industry, natural gas and other industries, for controlling the flow and direction of cryogenic fluid, the working principle of cryogenic ball valve is similar to ordinary ball valve, both are through rotating ball to control the on-off of fluid. Specifically, when handle or driving device rotates, valve stem drives ball to rotate, thereby changing the shape of passage in valve body. When ball rotates to tightly contact with valve seat, sealing is formed, to prevent fluid leakage; when ball rotates to separate from valve seat, fluid can flow through the passage in valve body.

[0003] The existing cryogenic ball valve usually focuses on improving the sealing of valve seat, and often ignores the sealing of other parts, for example, the connection sealing between input, output end and left, right end of cryogenic ball valve and conveying pipeline. Due to the influence of extreme low temperature, the connection between conveying pipeline and both ends of cryogenic ball valve often fails due to deformation and shrinkage of sealing material and pipeline material, and even causes pipeline damage and even breakage. In view of the above problems, the utility model provides a kind of high reliability sealing cryogenic ball valve to solve the above problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a kind of high reliability sealing cryogenic ball valve, solves the problem that the existing cryogenic ball valve usually focuses on improving the sealing of valve seat, and often ignores the sealing of other parts, for example, the connection sealing between input, output end and left, right end of cryogenic ball valve and conveying pipeline. Due to the influence of extreme low temperature, the connection between conveying pipeline and both ends of cryogenic ball valve often fails due to deformation and shrinkage of sealing material and pipeline material, and even causes pipeline damage and even breakage.

[0005] To achieve the above purpose, the utility model is realized by the following technical scheme: a kind of high reliability sealing cryogenic ball valve, including ball valve main body and the valve stem fixedly connected in the top of ball valve main body, the both ends of ball valve main body are respectively provided with ball valve input end and ball valve output end, the ball valve input end and ball valve output end are all fixedly connected with intermediate sealing sleeve pipe, wherein, the intermediate sealing sleeve pipe includes sleeve body, the both ends of sleeve body are fixedly connected with fixed ring plate, the outer end of fixed ring plate is fixedly connected with sealing rubber outer gasket, wherein, the inner pipe of ball valve input end and ball valve output end is all provided with inner pipe, the outer end of inner pipe is fixedly connected with fixed ring block, the outer end of inner pipe is fixedly connected with sealing rubber inner gasket.

[0006] Preferably, the sealing rubber outer gasket and the sealing rubber inner gasket are movably connected, the sealing rubber outer gasket and the sealing rubber inner gasket are in interference fit, and the fixed ring block is abutted against the fixed ring plate.

[0007] Preferably, flanges are fixedly connected to outer surfaces of the ball valve input end and the ball valve output end, and the flanges are internally provided with fixed bolts.

[0008] Preferably, fixed holes are formed in end faces of the intermediate sealing sleeve, the fixed bolts are threadedly connected in the fixed holes, and a support foot is fixedly connected to a bottom end of the sleeve body.

[0009] Preferably, a sealing heat preservation ring is fixedly connected between the outer end face of the sleeve body and the fixed ring plate.

[0010] Preferably, a rotating adjusting wheel is rotatably connected to a top end of the valve rod, a sealing flange is fixedly connected to a bottom end of the valve rod, and the sealing flange is connected with the ball valve body flange.

[0011] The utility model discloses a high reliability sealed cryogenic ball valve, which has the following beneficial effects: the high reliability sealed cryogenic ball valve is provided with an intermediate sealing sleeve at the outer end of the ball valve input end and the ball valve output end, so that the connection between the cryogenic ball valve and the transportation pipeline is additionally connected through an intermediate pipeline, the safety of the pipeline and the ball valve connection is improved, the direct loss caused by the damage of the pipeline and the ball valve connection is reduced, and the sealing of the pipeline and the ball valve connection is further improved through the interference fit between the sealing rubber inner gasket arranged in the ball valve input end and the sealing rubber outer gasket of the intermediate sealing sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0013] Figure 1 It is a whole front structure schematic diagram of the utility model;

[0014] Figure 2 It is a whole explosion structure schematic diagram of the utility model;

[0015] Figure 3 It is a ball valve body cross section structure schematic diagram of the utility model;

[0016] Figure 4 It is a whole structure schematic diagram of the intermediate sealing sleeve of the utility model;

[0017] Figure 5 It is the intermediate sealing sleeve explosion structure schematic view of the utility model.

[0018] Figure 6 It is the whole section structure schematic view of the utility model.

[0019] In the figure: 1, ball valve main body;11, ball valve input end;111, inner pipeline;112, fixed ring block;113, sealing rubber inner gasket;114, flange plate;115, fixed bolt;12, ball valve output end;2, valve rod;21, rotating adjusting wheel;22, sealing flange;3, intermediate sealing sleeve;31, sleeve main body;311, fixed hole;312, fixed ring plate;313, support foot base;32, sealing rubber outer gasket;33, sealing heat preservation ring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model more clear, the technical scheme in the embodiments of the utility model is clearly and completely described, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making the creative labor are within the protection scope of the utility model.

[0021] The high reliability sealing cryogenic ball valve provided by the embodiment of the application solves the problem that the existing cryogenic ball valve usually focuses on improving the sealing performance of the valve seat, and other parts, such as the connection sealing performance between the input and output ends of the cryogenic ball valve and the conveying pipeline at the left and right ends, are often ignored. Due to the influence of extremely low temperature, the connection between the conveying pipeline and the two ends of the cryogenic ball valve often fails due to the deformation and shrinkage of the sealing material and the pipeline material, and even the pipeline is damaged or broken.

[0022] In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings in the specification and specific embodiments.

[0023] The embodiment of the utility model discloses a high reliability sealing cryogenic ball valve.

[0024] According to the drawings Figures 1-6As shown, including the ball valve body 1 and fixedly connected to the top of the valve stem 2, ball valve body 1 both ends are provided with ball valve input end 11 and ball valve output end 12, ball valve input end 11 and ball valve output end 12 are fixedly connected with the intermediate sealing sleeve 3, wherein the intermediate sealing sleeve 3 includes sleeve body 31, both ends of the sleeve body 31 are fixedly connected with the fixed ring plate 312, the outer end of the fixed ring plate 312 is fixedly connected with the sealing rubber outer gasket 32, wherein the ball valve input end 11 and the ball valve output end 12 are provided with an inner pipe 111, the outer end of the inner pipe 111 is fixedly connected with the fixed ring block 112, the outer end of the inner pipe 11 is fixedly connected with the sealing rubber inner gasket 113, the sealing rubber outer gasket 32 and the sealing rubber inner gasket 113 are movably connected, the sealing rubber outer gasket 32 and the sealing rubber inner gasket 113 are interference fit, the fixed ring block 12 abuts against the fixed ring plate 312, one end of the intermediate sealing sleeve 3 is fixed with the pipeline connection, the other end is fixed with the ball valve input end 11 or the ball valve output end 12, so that the connection of the two is in the pipeline, the connection causes damage and does not cause pollution and leakage of liquid flow to the external environment, the fixed ring block 12 is abutted and closely extruded with the fixed ring plate 312 during connection, so that the sealing rubber outer gasket 32 and the sealing rubber inner gasket 113 are interference fit, even if the sealing rubber outer gasket 32 and the sealing rubber inner gasket 113 shrink under extreme temperature, they cannot cause sealing failure, which improves the reliability and sealing performance.

[0025] The outer surface of the ball valve input end 11 and the ball valve output end 12 is fixedly connected with the flange 114, the flange 114 is provided with a fixed bolt 115, the outer end surface of the intermediate sealing sleeve 3 and the fixed ring plate 312 are fixedly connected with the sealing heat preservation ring 33, the sleeve body 31 is provided with a fixed hole 311 on both end surfaces, the fixed bolt 115 is threadedly connected in the fixed hole 311, the sleeve body 31 is fixedly connected with a support foot 313 at the bottom end, the intermediate sealing sleeve 3 is connected with the flange at both sides of the pipeline connection, connected with the flange 114 and fixed, the sealing heat preservation ring 33 further improves the sealing performance of the intermediate sealing sleeve 3.

[0026] The top end of the valve stem 2 is rotatably connected with a rotating adjusting wheel 21, the bottom end of the valve stem 2 is fixedly connected with a sealing flange 22, and the sealing flange 22 is connected with the flange of the ball valve body 1.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] The high-reliability sealed cryogenic ball valve is provided with the intermediate sealing sleeve 3 at the outer end of the ball valve input end 11 and the ball valve output end 12, so that the connection between the cryogenic ball valve and the transportation pipeline is additionally connected through the intermediate pipeline, the safety of the connection between the pipeline and the ball valve is improved, the direct loss caused by the breakage of the connection between the pipeline and the ball valve is reduced, and the sealing of the connection between the pipeline and the ball valve is further improved through the interference fit between the sealing rubber inner gasket 113 in the ball valve input end 11 and the ball valve output end 12 and the sealing rubber outer gasket 32 of the intermediate sealing sleeve 3.

[0029] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by the skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only for illustrating the principle of the utility model, and various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-reliability sealed cryogenic ball valve, comprising a ball valve body (1) and a valve stem (2) fixedly connected to the top end of the ball valve body (1), and a ball valve input end (11) and a ball valve output end (12) are respectively arranged at the two ends of the ball valve body (1), characterized in that, The ball valve input end (11) and the ball valve output end (12) are fixedly connected with an intermediate sealing sleeve (3); The intermediate sealing sleeve (3) comprises a sleeve body (31), and the sleeve body (31) is fixedly connected with a fixed ring plate (312) at both ends, and the fixed ring plate (312) is fixedly connected with a sealing rubber outer gasket (32) at the outer end. The ball valve input end (11) and the ball valve output end (12) are fixedly connected with a fixed ring plate (312) at both ends, and the fixed ring plate (312) is fixedly connected with a sealing rubber outer gasket (32) at the outer end.

2. A high-reliability sealed cryogenic ball valve according to claim 1, characterized in that: The ball valve input end (11) and the ball valve output end (12) are fixedly connected with a fixed ring plate (312) at both ends, and the fixed ring plate (312) is fixedly connected with a sealing rubber outer gasket (32) at the outer end.

3. The high-reliability sealed cryogenic ball valve of claim 1, wherein: The sealing rubber outer gasket (32) and the sealing rubber inner gasket (113) are movably connected, and the sealing rubber outer gasket (32) and the sealing rubber inner gasket (113) are in interference fit, and the fixed ring block (112) abuts against the fixed ring plate (312).

4. A high-reliability sealed cryogenic ball valve according to claim 3, characterized in that: The ball valve input end (11) and the ball valve output end (12) are fixedly connected with a flange (114) on the outer surface, and the flange (114) is provided with a fixed bolt (115) inside.

5. The high-reliability sealed cryogenic ball valve of claim 1, wherein: The intermediate sealing sleeve (3) is provided with a fixed hole (311) on both end faces, and the fixed bolt (115) is threadedly connected in the fixed hole (311), and the sleeve body (31) is fixedly connected with a support foot (313) at the bottom.

6. The high-reliability sealed cryogenic ball valve of claim 1, wherein: The sleeve body (31) is fixedly connected with a sealing heat preservation ring (33) between the outer end face and the fixed ring plate (312). The valve rod (2) is rotatably connected with a rotating adjusting wheel (21) at the top end, and the valve rod (2) is fixedly connected with a sealing flange (22) at the bottom end, and the sealing flange (22) is connected with the ball valve body (1) flange.

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