Low-temperature ball valve capable of preventing medium leakage

Abstract

The utility model discloses a kind of low temperature ball valves to avoid medium leakage, relate to ball valve technical field, including valve body, the both ends of valve body are respectively fixed and have adapter pipe, double-layer sealing assembly is arranged between the port of adapter pipe and valve body, the outer side of adapter pipe one end is movably sleeved in double-layer sealing assembly, the outer side of adapter pipe other end is fixedly connected with connecting assembly, double-layer sealing assembly includes mounting ring and special rubber ring, and the outer side of special rubber ring is movably sleeved in mounting ring.The utility model is through the low temperature resistance characteristic and supporting force of mounting ring, cooperate the elastic sealing and gap compensation of special rubber ring, the low temperature adaptability and sealing reliability of double-layer sealing assembly are significantly improved by the synergistic effect of both, provide first stable sealing barrier for low temperature medium conveying.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a cryogenic ball valve that prevents media leakage. Background Technology

[0002] A cryogenic ball valve is a type of ball valve suitable for cryogenic and even ultra-low temperature operating conditions. Its key components, such as the valve body and valve core, are made of cryogenic materials (such as austenitic stainless steel), and through special structural design, it can maintain good sealing performance and operational reliability at extreme low temperatures, realizing the opening, closing, or regulation control of cryogenic media.

[0003] Under low-temperature conditions, the sealing components at valve connections face a dual challenge. On the one hand, low temperatures cause material shrinkage, creating tiny gaps in the originally tightly fitting sealing surface due to dimensional changes, forming potential leakage channels. On the other hand, the low-temperature environment causes sealing materials such as rubber and plastics to harden, gradually losing their original elasticity and deformation capacity, and becoming unable to compensate for unevenness in the sealing surface through their own elasticity. The combination of these two factors can cause the transported medium to breach the seal, resulting in leakage. Utility Model Content

[0004] The purpose of this invention is to solve the problem that, under low-temperature conditions, the sealing components at the valve connection are prone to sealing gaps due to material shrinkage, and low temperatures can cause the sealing components to harden and lose elasticity, leading to leakage of the conveying medium. Therefore, a low-temperature ball valve is proposed to prevent media leakage.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cryogenic ball valve for preventing media leakage, comprising a valve body, wherein two ends of the valve body are respectively fixedly connected to a transfer pipe, and a double-layer sealing assembly is provided between the transfer pipe and the port of the valve body, the double-layer sealing assembly being movably sleeved on the outside of one end of the transfer pipe, and a connecting assembly being fixedly connected to the outside of the other end of the transfer pipe, the double-layer sealing assembly comprising an installation ring and a special rubber ring, the special rubber ring being movably sleeved on the outside of the installation ring.

[0006] Preferably, an installation groove is provided on the outer side of one end of the adapter pipe, and the installation ring is sleeved on the inner side of the installation groove.

[0007] Preferably, the connection assembly includes a sealing cap and a connecting flange, the connecting flange being fixedly connected to the edge of the sealing cap.

[0008] Preferably, the sealing cap has a mounting hole at its center, and the other end of the adapter pipe is fixedly inserted through the mounting hole.

[0009] Preferably, the outer sides of both ends of the valve body are provided with a plurality of No. 1 connection holes arranged in a ring.

[0010] Preferably, the outer side of the connecting flange has several second connecting holes arranged in a ring, and bolts are movably inserted through the interior of each of the second connecting holes, with one end of the bolt threaded into the interior of the first connecting hole.

[0011] Preferably, another of the double-layer sealing components is disposed on the inside of the sealing cap.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the low-temperature resistance and supporting force of the mounting ring, combined with the elastic sealing and gap compensation of the special rubber ring, form a synergistic effect, which significantly improves the low-temperature adaptability and sealing reliability of the double-layer sealing assembly, providing the first stable sealing barrier for the transportation of low-temperature media.

[0014] 2. In this utility model, the bolt pre-tightening force makes the connecting flange and the valve body form a rigid connection, ensuring the overall coaxiality of the connecting assembly and the valve body and the connection stability, thereby making the sealing cover tightly and stably cover the end of the valve body. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a cryogenic ball valve for preventing media leakage is provided for this utility model.

[0016] Figure 2 This utility model provides a schematic diagram illustrating the connection relationship between the valve body and the connecting components in a cryogenic ball valve designed to prevent media leakage.

[0017] Figure 3 A three-dimensional structural diagram of the connecting component in a cryogenic ball valve to prevent media leakage is provided for this utility model.

[0018] Figure 4 This utility model presents a three-dimensional structural diagram of a double-layer sealing assembly in a cryogenic ball valve to prevent media leakage.

[0019] Legend: 1. Valve body; 11. Connection hole 1; 2. Adapter pipe; 21. Mounting groove; 3. Double sealing assembly; 31. Mounting ring; 32. Special rubber ring; 4. Connection assembly; 41. Sealing cover; 411. Mounting hole; 42. Connection flange; 421. Connection hole 2. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1: As Figure 1 - Figure 4 As shown, this utility model provides a cryogenic ball valve to prevent media leakage, including a valve body 1. Both ends of the valve body 1 are fixedly connected to a transfer pipe 2. A double-layer sealing assembly 3 is provided between the transfer pipe 2 and the port of the valve body 1. The double-layer sealing assembly 3 is movably sleeved on the outside of one end of the transfer pipe 2. A connecting assembly 4 is fixedly connected to the outside of the other end of the transfer pipe 2. The double-layer sealing assembly 3 includes an installation ring 31 and a special rubber ring 32. The special rubber ring 32 is movably sleeved on the outside of the installation ring 31. An installation groove 21 is opened on the outside of one end of the transfer pipe 2, and the installation ring 31 is sleeved on the inside of the installation groove 21.

[0023] The specific settings and functions of this embodiment are described below. Under low-temperature conditions, when the conveying medium flows through the low-temperature ball valve of this utility model, the double-layer sealing assembly 3 preferentially plays its core sealing role. The double-layer sealing assembly 3 consists of an mounting ring 31 and a special rubber ring 32. The core structural component of the mounting ring 31, the mounting ring 31, is made of polytetrafluoroethylene (PTFE). Relying on the excellent low-temperature resistance and self-lubricating properties of PTFE, the mounting ring 31 can maintain a stable structural shape and a certain degree of flexibility even in extreme low-temperature environments, effectively resisting material embrittlement and dimensional deformation caused by low temperatures. The special rubber ring 32 is specifically made of low-temperature special rubber material, which can maintain excellent elasticity under low-temperature conditions, actively compensating for the shrinkage of components caused by temperature reduction and reducing the generation of gaps in the sealing surface. Through the low-temperature resistance and supporting force of the mounting ring 31, combined with the elastic sealing and gap compensation of the special rubber ring 32, the two form a synergistic effect, significantly improving the low-temperature adaptability and sealing reliability of the double-layer sealing assembly 3, providing the first stable sealing barrier for the conveying of low-temperature media.

[0024] Example 2: Figure 1 - Figure 4As shown, the cryogenic ball valve for preventing media leakage in this utility model includes a valve body 1. A connecting pipe 2 is fixedly connected to both ends of the valve body 1. A double-layer sealing assembly 3 is provided between the connecting pipe 2 and the port of the valve body 1. The double-layer sealing assembly 3 is movably sleeved on the outside of one end of the connecting pipe 2. A connecting assembly 4 is fixedly connected to the outside of the other end of the connecting pipe 2. The double-layer sealing assembly 3 includes an mounting ring 31 and a special rubber ring 32. The special rubber ring 32 is movably sleeved on the outside of the mounting ring 31. The connecting assembly 4 includes a sealing cap 41 and a connecting flange 42. The connecting flange 42 is fixedly... The connecting pipe 2 is fixedly connected to the edge of the sealing cover 41. The sealing cover 41 has a mounting hole 411 in the center. The other end of the connecting pipe 2 is fixedly inserted through the mounting hole 411. Several No. 1 connecting holes 11 are arranged in a ring on the outer side of both ends of the valve body 1. Several No. 2 connecting holes 421 are arranged in a ring on the outer side of the connecting flange 42. Bolts are movably inserted through the interior of the several No. 2 connecting holes 421. One end of the bolt is threaded into the interior of the No. 1 connecting hole 11. Another double-layer sealing component 3 is set on the inner side of the sealing cover 41.

[0025] The overall effect of this embodiment is that the connecting assembly 4 achieves stable assembly with the valve body 1 through the coordinated cooperation of the connecting flange 42 and bolts: the connecting flange 42 is precisely aligned with the flange face of the valve body 1 end flange and the sealing cover 41 of the connecting assembly 4; the bolts are then tightened after passing through the flange holes of the connecting flange 42 and the valve body 1 in sequence; the bolt preload ensures a rigid connection between the connecting flange 42 and the valve body 1, ensuring the coaxiality and connection stability of the connecting assembly 4 and the valve body 1, thereby allowing the sealing cover 41 to tightly and stably cover the end of the valve body 1, avoiding the risk of sealing failure due to loose assembly. Simultaneously, another set of double-layer sealing assemblies 3 is provided inside the sealing cover 41 to further enhance the overall low-temperature resistance and sealing reliability of the cryogenic ball valve.

[0026] The usage and working principle of this device are as follows: Under low-temperature conditions, when the conveying medium flows through the low-temperature ball valve of this utility model, the double-layer sealing component 3 gives priority to the core sealing function. The core structural component of the mounting ring 31, the mounting ring 31, is made of polytetrafluoroethylene (PTFE) material. Relying on the excellent low-temperature resistance and self-lubricating properties of PTFE, the mounting ring 31 can maintain a stable structural shape and a certain degree of flexibility under extreme low-temperature environments, effectively resisting material embrittlement and dimensional deformation caused by low temperatures. The special rubber ring 32 is specifically made of low-temperature special rubber material, which can maintain excellent elasticity under low-temperature conditions and can actively compensate for the shrinkage of components caused by temperature reduction, reducing the generation of gaps in the sealing surface.

[0027] The connecting assembly 4 achieves stable assembly with the valve body 1 through the coordinated cooperation of the connecting flange 42 and bolts: the connecting flange 42 is precisely aligned with the flange face of the valve body 1 end flange and the sealing cover 41 of the connecting assembly 4 respectively, and the bolts are tightened after passing through the flange holes of the connecting flange 42 and the valve body 1 in sequence. The bolt preload makes the connecting flange 42 and the valve body 1 form a rigid connection, ensuring the coaxiality and connection stability of the overall assembly of the connecting assembly 4 and the valve body 1, thereby making the sealing cover 41 tightly and stably cover the end of the valve body 1.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. Cryogenic ball valve avoiding medium leakage, comprising a valve body (1), characterized in that: The valve body (1) is fixedly connected to the two ends of the adapter pipe (2). A double-layer sealing assembly (3) is provided between the adapter pipe (2) and the port of the valve body (1). The double-layer sealing assembly (3) is movably sleeved on the outside of one end of the adapter pipe (2). A connecting assembly (4) is fixedly connected to the outside of the other end of the adapter pipe (2). The double-layer sealing assembly (3) includes an installation ring (31) and a special rubber ring (32). The special rubber ring (32) is movably sleeved on the outside of the installation ring (31).

2. The cryogenic ball valve of claim 1, wherein: An installation groove (21) is provided on the outer side of one end of the adapter pipe (2), and the installation ring (31) is sleeved on the inner side of the installation groove (21).

3. A cryogenic ball valve for preventing media leakage according to claim 1, characterized in that: The connecting assembly (4) includes a sealing cover (41) and a connecting flange (42), which is fixedly connected to the edge of the sealing cover (41).

4. A cryogenic ball valve for preventing media leakage according to claim 3, characterized in that: The sealing cap (41) has a mounting hole (411) at its center, and the other end of the adapter pipe (2) is fixedly inserted through the mounting hole (411).

5. A cryogenic ball valve for preventing media leakage according to claim 4, characterized in that: The valve body (1) has several No. 1 connection holes (11) arranged in a ring on the outer sides of both ends.

6. A cryogenic ball valve for preventing media leakage according to claim 5, characterized in that: The outer side of the connecting flange (42) has several second connecting holes (421) arranged in a ring. Bolts are movably inserted through the interior of each of the second connecting holes (421), and one end of the bolts is threaded into the interior of the first connecting hole (11).

7. A cryogenic ball valve for preventing media leakage according to claim 3, characterized in that: Another of the double-layer sealing components (3) is disposed on the inside of the sealing cap (41).

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