Expansion valve with high sealing performance

Abstract

The utility model relates to the field of expansion valves, in particular to an expansion valve with high sealing performance, which comprises an expansion valve body, connectors are respectively mounted on two sides of the expansion valve body, connecting pipes are respectively arranged at opposite ends of the connectors, annular bosses are mounted on the surfaces of the connectors, and the connecting pipes are connected with the annular bosses. A conical pipe joint is in threaded connection with the annular boss, one end of the connecting pipe is located on the inner side of the conical pipe joint, an annular opening is formed in the surface of the opposite end of the connecting pipe, a first sealing assembly is in threaded connection with the annular opening, and a plurality of containing grooves are formed in the surface of the annular opening in an annular array mode. The connector and the connecting pipe are connected through the conical pipe connector, the conical elastic pressing part is promoted to press the conical elastic sealing part in the connecting process, the conical elastic pressing part and the conical elastic sealing part are tightly attached, the sealing effect is achieved, meanwhile, the first sealing assembly is matched, the double-sealing effect is achieved, and the sealing performance of the expansion valve is further improved.

Description

Technical Field

[0001] The utility model relates to the field of expansion valves, in particular to an expansion valve with strong sealing performance. Background Art

[0002] An expansion valve, also known as a temperature and pressure relief valve or a throttle valve, is a device used to regulate fluid flow. In a refrigeration system, it is usually called an expansion valve and is one of the four major components of a refrigeration system. Expansion valves can be divided into many types according to their structure and function and are used in different fields. During the long-term use of the expansion valve, due to the scouring and friction of the medium, the sealing surfaces of the connectors at both ends may wear, resulting in a decrease in sealing performance. This wear will not only affect the tightness of the valve closure, but may also cause leakage problems. Therefore, the connectors at both ends of the expansion valve are generally sealed with anti-corrosion sealing elements.

[0003] With respect to the above-mentioned related technologies, the inventors have found that the sealing elements will age and harden after long-term use, and are difficult to replace, resulting in a decrease in sealing performance. This is especially true in chemical and metallurgical environments where the medium contains corrosive substances that will corrode the seals of the expansion valve, thereby reducing the sealing performance of the expansion valve. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide an expansion valve with strong sealing performance, so as to facilitate the replacement of the sealing element and improve the sealing performance of the expansion valve.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide an expansion valve with strong sealing performance, including: an expansion valve body, connectors are respectively installed on both sides of the expansion valve body, and connecting pipes are respectively provided at the opposite ends of the connectors, an annular boss is installed on the surface of the connector, and a conical pipe joint is threadedly connected to the annular boss, one end of the connecting pipe is located on the inner side of the conical pipe joint, and an annular opening is respectively opened on the surface of the opposite end of the connector, and a sealing component 1 is threadedly connected to the annular opening, and a plurality of placement grooves are opened in an annular array on the surface of the annular opening, and the threads of the sealing component 1 and the conical pipe joint are in the same direction;

[0006] It also includes a sealing component 2, the sealing component 2 includes an elastic clamping ring and a folding telescopic portion, one end of the folding telescopic portion is connected to a conical elastic sealing portion, and the other end is connected to a plurality of mounting blocks in an annular array, the mounting blocks are snapped into the placement groove, the elastic clamping ring is connected to the mounting blocks, and the elastic clamping ring is respectively in contact with the end face of the sealing component 1 and the end face of the connector;

[0007] The facing ends of the connecting pipes are respectively connected with conical elastic pressing parts, and the inner side surfaces of the conical elastic pressing parts are in contact with the conical elastic sealing parts.

[0008] By adopting the above technical scheme, a preliminary sealing barrier is formed by threading the annular boss with the tapered pipe joint. In addition, the threaded connection between the sealing component 1 and the annular opening further enhances the sealing between the connector and the pipe. The clamping design of the mounting block and the placement groove in the sealing component 2 not only simplifies the installation process, but also improves the connection strength between the sealing component and the connector, thereby enhancing the stability of the entire connection system. At the same time, the folding telescopic part enables the sealing component 2 to adapt to the changes in the connection gap to a certain extent, and cooperates with the elastic clamping ring to enable the sealing component 2 to automatically adjust when subjected to external force, and maintain close contact with the sealing component 1 and the end face of the connector, thereby improving the flexibility and durability of the entire connection system. When a component is worn or damaged, it can be quickly located and replaced, reducing maintenance costs and downtime.

[0009] In a preferred example, the utility model can be further configured as follows: the sealing component includes a threaded ring, the threaded ring is provided with a chamfered surface at one end close to the connecting pipe, the chamfered surface is provided with a groove, a sealing ring is embedded in the groove, and the sealing ring is in contact with the conical elastic clamping part.

[0010] By adopting the above technical solution, the chamfered surface helps to guide the fluid to transition smoothly and reduce the impact and wear of the fluid on the sealing surface. The sealing ring in the groove is directly connected with the conical elastic sealing part to form a sealing barrier. At the same time, the sealing ring is connected with the conical elastic pressing part to form a multi-level sealing structure, thereby further improving the sealing performance.

[0011] In a preferred example, the utility model can be further configured as follows: a mounting groove is provided on the inner side of the conical pipe joint close to one end of the connecting pipe, and a movable ring is rotatably connected in the mounting groove.

[0012] By adopting the above technical solution, the design of the movable ring makes the sealing interface between the tapered pipe joint and the connecting pipe more flexible and adaptable. When the connecting pipe is inserted into the tapered pipe joint, the movable ring can be fine-tuned according to the shape and size of the connecting pipe to ensure a close fit between the two. In addition, the movable ring makes it easier to insert the connecting pipe into the tapered pipe joint. During the installation process, even if the centering of the connecting pipe and the tapered pipe joint is slightly deviated, the movable ring can automatically adjust through its rotation ability to ensure smooth connection, reduce installation difficulty, and improve work efficiency.

[0013] In a preferred example, the utility model can be further configured as follows: the outer diameter of the elastic clamping ring is larger than the outer diameter of the threaded ring, and the outer diameter of the elastic clamping ring is smaller than the outer diameter of the annular boss.

[0014] By adopting the above technical solution, the elastic clamping ring can cover and fit tightly against the outer edge of the threaded ring when installed and clamped, ensuring a larger contact area between the sealing component and the connector, thereby enhancing the clamping effect. During operation, even if subjected to pressure fluctuations or vibrations, the elastic clamping ring can provide sufficient clamping force to maintain the integrity and stability of the seal.

[0015] In a preferred example, the present invention can be further configured as follows: when the foldable and telescopic portion is contracted, its inner circular surface coincides with the inner circular surface of the connecting head.

[0016] By adopting the above technical solution, when the foldable telescopic part is in a retracted state, its inner circular surface coincides with the inner circular surface of the connecting head, so that the fluid will not encounter additional obstacles or reduction in diameter when passing through the connecting system, thereby effectively reducing the resistance to fluid flow, improving the circulation efficiency of the system, and helping to reduce energy consumption and improve overall performance.

[0017] In summary, the utility model includes at least one of the following beneficial technical effects of an expansion valve with strong sealing performance:

[0018] 1. The connector and the connecting pipe are connected through a tapered pipe joint, and during the connection process, the tapered elastic pressing part is pressed against the tapered elastic sealing part, so that the two fit closely to achieve a sealing effect. The tapered design can better adapt to the tiny connection gap and automatically adjust under pressure to ensure the integrity and durability of the seal. At the same time, it cooperates with the sealing component to achieve a double sealing effect, further improving the sealing performance of the expansion valve.

[0019] 2. By rotating the sealing component 1, the sealing component 2 can be disassembled and replaced, so that when it is worn or damaged, it can be quickly located and replaced, which reduces maintenance costs and downtime and simplifies the installation process.

[0020] 3. When the sealing ring is in contact with the conical elastic sealing part, a multi-level sealing structure is formed to effectively prevent fluid leakage. The adaptability of the conical design is utilized to automatically adjust the shape when under pressure to form a closer contact with the sealing ring, thereby further improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which:

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a partial schematic diagram of the connector and the connecting pipe of the utility model;

[0024] Figure 3 It is a partial exploded view of the connector of the utility model;

[0025] Figure 4 for Figure 2 Enlarged view of point A in .

[0026] Figure: 1, expansion valve body; 2, connector; 3, connecting pipe; 4, annular boss; 5, conical pipe joint; 6, annular opening; 70, sealing component 1; 8, placement groove; 90, sealing component 2; 11, installation groove; 12, movable ring; 13, conical elastic pressing part

[0027] 71. threaded ring; 72. chamfered angle surface; 73. groove; 74. sealing ring;

[0028] 91. Elastic clamping ring; 92. Folding telescopic portion; 93. Conical elastic sealing portion; 94. Mounting block. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] It should be noted that these drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0031] Reference Figure 1-4, which is an expansion valve with strong sealing performance disclosed by the utility model, comprising: an expansion valve body 1, connectors 2 are respectively installed on both sides of the expansion valve body 1, and connecting pipes 3 are respectively provided at the opposite ends of the connectors 2, an annular boss 4 is installed on the surface of the connector 2, and a conical pipe joint 5 is threadedly connected to the annular boss 4, one end of the connecting pipe 3 is located on the inner side of the conical pipe joint 5, and an annular opening 6 is respectively opened on the surface of the opposite end of the connector 2, and a sealing component 70 is threadedly connected to the annular opening 6, and a plurality of placement grooves 8 are opened in an annular array on the surface of the annular opening 6, and the threads of the sealing component 70 and the conical pipe joint 5 are in the same direction, and also includes a sealing component Second 90, the sealing component second 90 includes an elastic clamping ring 91 and a folding telescopic part 92, one end of the folding telescopic part 92 is connected to a conical elastic sealing part 93, and the other end is connected to a plurality of mounting blocks 94 in an annular array, the mounting block 94 is snapped into the placement groove 8, the elastic clamping ring 91 is connected to the mounting block 94, the elastic clamping ring 91 is respectively connected to the end face of the sealing component 1 70 and the end face of the connector 2 in abutment, when the folding telescopic part 92 is contracted, its inner circular surface coincides with the inner circular surface of the connector 2, and the opposite ends of the connecting pipe 3 are respectively connected to a conical elastic clamping part 13, and the inner side surface of the conical elastic clamping part 13 is in abutment with the conical elastic sealing part 93;

[0032] The interior of the connector 2 and the connecting pipe 3 is provided with a corrosion-resistant coating, and the sealing component 1 70 and the sealing component 2 90 are both made of corrosion-resistant materials, which further improves the corrosion resistance of the expansion valve and improves its sealing performance. When the connector 2 is connected to the connecting pipe 3, the conical elastic pressing portion 13 of the connecting pipe 3 presses the conical elastic sealing portion 93 to make the two fit tightly, and at the same time cooperates with the sealing component 1 70 to achieve a double sealing effect, further improving the sealing performance of the expansion valve during use. When the sealing component 1 70 and the sealing component 2 90 are worn or damaged, the sealing component 1 70 can be rotated to disassemble and replace the sealing component 2 90, thereby reducing maintenance costs and downtime. At the same time, since the sealing component 1 70 and the conical pipe joint 5 have threads in the same direction, the two tend to lock with each other when subjected to vibration or pressure fluctuations, and have a self-locking characteristic, which helps to keep the sealing surface in close contact and prevent loosening and leakage.

[0033] The sealing assembly 70 includes a threaded ring 71, and a chamfered surface 72 is provided at one end of the threaded ring 71 close to the connecting pipe 3. A groove 73 is formed on the chamfered surface 72, and a sealing ring 74 is embedded in the groove 73. The sealing ring 74 is in contact with the conical elastic pressing portion 13. The outer diameter of the elastic pressing ring 91 is larger than the outer diameter of the threaded ring 71, and the outer diameter of the elastic pressing ring 91 is smaller than the outer diameter of the annular boss 4. When the connector 2 and the connecting pipe 3 are connected, the sealing ring 74 is in close contact with the conical elastic pressing portion 13, and cooperates with the conical elastic sealing portion 93 to form a multi-level sealing structure to effectively prevent fluid leakage. Since the outer diameter of the elastic pressing ring 91 is larger than the outer diameter of the threaded ring 71, and the outer diameter of the elastic pressing ring 91 is smaller than the outer diameter of the annular boss 4, after installation and compression, a "nested" sealing structure can be formed, which forms an additional barrier to help prevent fluid leakage through the gap and reduce the risk of leakage.

[0034] An installation groove 11 is provided on the inner side of the tapered pipe joint 5 near one end of the connecting pipe 3, and a movable ring 12 is rotatably connected in the installation groove 11; when the connecting pipe 3 is inserted into the tapered pipe joint 5, the movable ring 12 can be fine-tuned according to the shape and size of the connecting pipe 3 to ensure a close fit between the two. At the same time, during the installation process, the movable ring 12 keeps the end of the connecting pipe 3 in a relatively horizontal state, ensuring smooth connection, reducing installation difficulty, and improving work efficiency.

[0035] The implementation principle of this embodiment is: when in use, the staff will assemble the connecting pipe 3 and the tapered pipe joint 5 in advance, calibrate and rotate the tapered pipe joint 5 and the connecting head 2, and tighten them using the corresponding installation tools and relying on the threads of the tapered pipe joint 5 and the annular boss 4. In the process of gradual tightening, the tapered elastic pressing part 13 of the connecting pipe 3 will press the tapered elastic sealing part 93 and the sealing ring 74 in turn, and fit them tightly, so as to achieve a double sealing effect and improve the sealing performance of the expansion valve during use.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An expansion valve with strong sealing performance, comprising: An expansion valve body (1), wherein connectors (2) are respectively installed on both sides of the expansion valve body (1), characterized in that a connecting pipe (3) is respectively provided at the opposite ends of the connecting head (2), an annular boss (4) is installed on the surface of the connecting head (2), a conical pipe joint (5) is threadedly connected to the annular boss (4), one end of the connecting pipe (3) is located on the inner side of the conical pipe joint (5), an annular opening (6) is respectively opened on the surface of the opposite end of the connecting head (2), a sealing component (70) is threadedly connected to the annular opening (6), a plurality of placement grooves (8) are opened in an annular array on the surface of the annular opening (6), and the threads of the sealing component (70) and the conical pipe joint (5) are in the same direction; It also includes a sealing component 2 (90), the sealing component 2 (90) including an elastic clamping ring (91) and a folding and telescopic portion (92), one end of the folding and telescopic portion (92) is connected to a conical elastic sealing portion (93), and the other end is connected to a plurality of mounting blocks (94) in a ring array, the mounting blocks (94) are snap-fitted into the placement groove (8), the elastic clamping ring (91) is connected to the mounting blocks (94), and the elastic clamping ring (91) is respectively in contact with the end face of the sealing component 1 (70) and the end face of the connector (2); The facing ends of the connecting pipes (3) are respectively connected with conical elastic pressing parts (13), and the inner side surfaces of the conical elastic pressing parts (13) are in contact with the conical elastic sealing parts (93).

2. An expansion valve with strong sealing performance according to claim 1, characterized in that: The sealing assembly (70) comprises a threaded ring (71), and a chamfered surface (72) is provided at one end of the threaded ring (71) close to the connecting pipe (3). A groove (73) is provided on the chamfered surface (72), and a sealing ring (74) is embedded in the groove (73). The sealing ring (74) is in contact with the conical elastic pressing portion (13).

3. The expansion valve with strong sealing performance according to claim 1, characterized in that: A mounting groove (11) is provided on the inner side of the conical pipe joint (5) close to one end of the connecting pipe (3), and a movable ring (12) is rotatably connected in the mounting groove (11).

4. The expansion valve with strong sealing performance according to claim 2, characterized in that: The outer diameter of the elastic clamping ring (91) is greater than the outer diameter of the threaded ring (71), and the outer diameter of the elastic clamping ring (91) is smaller than the outer diameter of the annular boss (4).

5. The expansion valve with strong sealing performance according to claim 1, characterized in that: When the foldable and telescopic portion (92) is contracted, its inner circular surface coincides with the inner circular surface of the connecting head (2).

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