Expansion valve

Abstract

The utility model relates to the field of expansion valves, in particular to an expansion valve which comprises an expansion valve body, two sides of the expansion valve body are respectively connected with an inlet and outlet pipe orifice, one end of the inlet and outlet pipe orifice far away from the expansion valve body is respectively connected with an installation port, and one side of the installation port far away from the expansion valve body is respectively provided with an expansion joint assembly. A sealing mechanism is connected between the telescopic connector assembly and the mounting port, the telescopic connector assembly comprises a first connecting flange and a second connecting flange, and an elastic metal corrugated pipe is connected between the first connecting flange and the second connecting flange. By installing the metal corrugated pipe and the guide rod piece, the whole expansion valve pipeline system has higher flexibility, the metal corrugated pipe has excellent flexibility, the length can be adjusted when the sealing ring is replaced, the length change of the pipeline caused by temperature change can be absorbed, and the service life of the expansion valve pipeline system is prolonged. And deformation or stress damage of the joint of the expansion valve body and the pipeline is prevented.

Description

Technical Field

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

[0002] The expansion valve, also known as the throttle valve, is an important component in the refrigeration system. It is usually installed between the liquid storage cylinder and the evaporator. It is based on the principle of thermodynamics. When the refrigeration system moves from a high-temperature area to a low-temperature area, the flow rate of the refrigerant in the expansion valve slows down, the pressure decreases, and the temperature also drops accordingly. By adjusting the valve opening at the outlet, the pressure and temperature of the refrigerant in the evaporator can be controlled, so that it can automatically adjust the operating state of the refrigeration system according to changes in load.

[0003] With respect to the above-mentioned related technologies, the inventors found that after long-term use, the end and sealing ring position of the expansion valve will be affected by factors such as internal fluid impact friction and corrosion, which may easily cause surface wear and reduced sealing performance. Therefore, the sealing ring needs to be replaced after a period of use. After the expansion valve and the external channel are disassembled, the installation gap between the two is small, making it difficult to replace the sealing ring. The conventional operation method requires disassembling a section of the pipeline to facilitate the installation of the sealing ring. This method will affect its replacement efficiency and the efficiency of liquid transportation. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide an expansion valve, which is convenient for improving the sealing performance of the sealing ring and the replacement efficiency of the sealing ring, thereby improving the liquid conveying efficiency.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide an expansion valve, comprising: an expansion valve body, both sides of the expansion valve body are respectively connected with inlet and outlet pipes, the ends of the inlet and outlet pipes away from the expansion valve body are respectively connected with installation ports, the side of the installation port away from the expansion valve body is respectively provided with a telescopic joint assembly, and a sealing mechanism is respectively connected between the telescopic joint assembly and the installation port;

[0006] The expansion joint assembly comprises a connecting flange 1 and a connecting flange 2, wherein an elastic metal bellows is connected between the connecting flange 1 and the connecting flange 2;

[0007] A plurality of guide rods are arranged in a circular array between the outer circles of the connecting flange 1 and the connecting flange 2.

[0008] By adopting the above technical solution, the sealing mechanism improves the sealing performance between the expansion valve body and the expansion joint assembly. At the same time, under the action of the connecting flange and the installation port, the connection points at both ends are fixed, and the length of the elastic metal bellows is adjusted so that the sealing rings at the connecting ends of the two can be replaced. At the same time, under the action of the guide rod, the elastic metal bellows is adjusted in a straight line direction to ensure its stable use. It can also absorb the change in pipeline length caused by temperature change and prevent the expansion valve body and the pipeline connection from deformation or force damage.

[0009] In a preferred example, the utility model can be further configured as follows: the sealing mechanism includes an annular groove opened on the installation port, one end of the connecting flange close to the annular groove is connected to an annular boss adapted thereto, a sealing ring 1 is installed in the annular groove, and a sealing ring 2 is connected to the outer side of the annular boss.

[0010] By adopting the above technical solution, the sealing ring 1 and the annular groove play a primary sealing effect, and the sealing ring 2 and the annular boss play a secondary sealing role, thereby improving the sealing performance of the expansion valve connection.

[0011] In a preferred example, the utility model can be further configured as follows: a plurality of even-numbered waterproof lines 1 are opened on one side of the annular groove close to the annular boss, and the waterproof lines 1 are respectively spaced apart toward the center of the annular groove; a plurality of odd-numbered waterproof lines 2 are opened on one side of the annular boss close to the waterproof line 1, and the waterproof lines 2 are spaced apart toward the center of the annular boss; one end of the sealing ring 1 close to the waterproof line 1 is connected to a waterproof boss 1 matching the waterproof line 1, and one end of the sealing ring 1 close to the waterproof line 2 is connected to a waterproof boss 2 matching the waterproof line 2.

[0012] By adopting the above technical solution, waterproof line one is installed corresponding to waterproof boss one, and waterproof line two is installed corresponding to waterproof boss two, which can form a tight seal and effectively prevent liquid from overflowing from the expansion valve body, thereby avoiding corrosion or damage of the expansion valve due to liquid leakage and further improving the sealing effect.

[0013] In a preferred example, the utility model can be further configured as follows: a plurality of odd-numbered waterproof lines three are opened at one end of the installation port close to the connecting flange one, and the waterproof lines three are respectively spaced apart toward the center of the installation port; a plurality of even-numbered waterproof lines four are opened at one end of the connecting flange one close to the waterproof line three, and the waterproof lines four are respectively spaced apart toward the center of the connecting flange; a waterproof boss three matching the waterproof line three is connected to one end of the sealing ring two close to the waterproof line four, and a waterproof boss four matching the waterproof line four is connected to one end of the sealing ring two close to the waterproof line four.

[0014] By adopting the above technical solution, waterproof line three is installed corresponding to waterproof boss three, and waterproof line four is installed corresponding to waterproof boss four, which can enhance the overall sealing performance of the expansion valve, effectively prevent the leakage of liquid, gas or other media, and form a multi-layer sealing protection effect.

[0015] In a preferred example, the utility model can be further configured as follows: the guide rod comprises a mounting seat 1 mounted on a connecting flange 1 and a mounting seat 2 mounted on a connecting flange 2, wherein a locking bolt is connected between the mounting seat 1 and the mounting seat 2.

[0016] By adopting the above technical solution, the guide rod plays a guiding and positioning role on the elastic metal bellows, ensuring that the elastic metal bellows maintains the correct direction and position during the expansion and contraction process to prevent it from twisting or shifting. At the same time, the coordinated use of the guide rod and the elastic metal bellows can limit the expansion and contraction range of the elastic metal bellows to prevent it from being damaged or failing due to excessive expansion and contraction, thereby protecting the safety of the expansion valve body and the entire pipeline system.

[0017] In a preferred example, the utility model can be further configured as follows: an electroplated anti-corrosion conical transition section is provided on the inner side of the inlet and outlet pipe openings, and a larger circle of the electroplated anti-corrosion conical transition section is disposed close to the expansion joint assembly.

[0018] By adopting the above technical solution, the electroplated anti-corrosion conical transition section can buffer the impact of the fluid when entering and exiting the pipe, reduce the impact force on the valve core, and reduce the risk of damage due to fluid impact. At the same time, it can effectively isolate the direct contact between the corrosive medium and the substrate, thereby improving the corrosion resistance of the expansion valve body.

[0019] In summary, the utility model includes at least one of the following beneficial technical effects of the expansion valve:

[0020] 1. By installing metal bellows and guide rods, the entire expansion valve pipeline system has higher flexibility and can adapt to more working environments and conditions. At the same time, the metal bellows has excellent elasticity and can compensate for changes in pipeline length caused by temperature changes or pressure changes, preventing the pipeline from being damaged or deformed due to excessive stress. The length of the connection end can also be adjusted when replacing the sealing ring. At the same time, under the action of the connecting flange and the installation port, the connection between the two ends of the expansion valve body and the elastic metal bellows is fixed, making the subsequent disassembly and assembly of the sealing ring more convenient and improving the replacement efficiency.

[0021] 2. By installing waterproof line 1 in correspondence with waterproof boss 1, waterproof line 2 in correspondence with waterproof boss 2, waterproof line 3 in correspondence with waterproof boss 3, and waterproof line 4 in correspondence with waterproof boss 4, not only multiple tight seals can be formed, but also liquid can be effectively prevented from overflowing from the expansion valve body, corrosion or damage of the expansion valve due to liquid leakage can be avoided, the sealing effect can be further improved, and the overall sealing performance of the expansion valve can be enhanced, effectively preventing leakage of liquid, gas or other media, forming a multi-layer sealing protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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:

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the sealing mechanism of the utility model;

[0025] Figure 3 for Figure 2 Isometric view of the other side;

[0026] Figure 4 It is a structural schematic diagram of the expansion joint assembly of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the guide rod of the utility model.

[0028] In the figure: 1. Expansion valve body; 2. Inlet and outlet pipes; 3. Installation port; 40. Expansion joint assembly; 50. Sealing mechanism; 6. Electroplating anti-corrosion conical transition section;

[0029] 41. Connecting flange 1; 42. Connecting flange 2; 43. Elastic metal bellows; 44. Guide rod;

[0030] 51, annular groove; 52, annular boss; 53, sealing ring 1; 54, sealing ring 2; 55, waterproof line 1; 56, waterproof line 2; 57, waterproof boss 1; 58, waterproof boss 2; 59, waterproof line 3; 5a, waterproof line 4; 5b, waterproof boss 3; 5c, waterproof boss 4;

[0031] 441. Mounting seat 1; 442. Mounting seat 2; 443. Locking bolt. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] Reference Figure 1-5 , is an expansion valve disclosed in the utility model, comprising: an expansion valve body 1, inlet and outlet pipes 2 are connected to both sides of the expansion valve body 1, the inlet and outlet pipes 2 are connected to the ends of the expansion valve body 1, the installation ports 3 are connected to the ends of the installation ports 3 away from the expansion valve body 1, expansion joint assemblies 40 are provided on the sides of the installation ports 3 away from the expansion valve body 1, sealing mechanisms 50 are connected between the expansion joint assemblies 40 and the installation ports 3, electroplated anti-corrosion conical transition sections 6 are provided on the inner sides of the inlet and outlet pipes 2, the larger circle of the electroplated anti-corrosion conical transition section 6 is arranged close to the expansion joint assembly 40, and the expansion joint assembly 40 is provided with a sealing mechanism 50. The reduction joint assembly 40 includes a connecting flange 1 41 and a connecting flange 2 42, an elastic metal bellows 43 is connected between the connecting flange 1 41 and the connecting flange 2 42, and a plurality of guide rods 44 are arranged in a circular array between the outer circles of the connecting flange 1 41 and the connecting flange 2 42, and the connecting flange 1 41 and the connecting flange 2 42. The guide rods 44 include a mounting seat 1 441 installed on the connecting flange 1 41 and a mounting seat 2 442 installed on the connecting flange 2 42, and a locking bolt 443 is connected between the mounting seat 1 441 and the mounting seat 2 442.

[0035] Furthermore, the electroplated anti-corrosion conical transition section 6 forms a protective layer on the inner side of the inlet and outlet pipe ports 2 of the expansion valve body 1, which can effectively isolate the corrosive medium from direct contact with the substrate, and can also achieve a smooth transition between the pipe port and the expansion joint assembly 40, thereby reducing the resistance of the fluid during the flow process, reducing the impact force on the valve core, and improving the fluid dynamics performance of the system. At the same time, when maintaining the sealing mechanism 50, the guide rod 44 can limit the expansion and contraction range of the elastic metal bellows 43 to prevent it from being damaged or failed due to excessive expansion and contraction, and make the elastic metal bellows 43 shrink along the axial direction of the locking bolt 443, so as to replace and maintain the internal sealing mechanism 50. At the same time, the elastic metal bellows 43 has excellent elasticity, can compensate for changes in pipeline length caused by temperature changes or pressure changes, prevent the pipeline from being damaged or deformed due to excessive stress, and absorb vibrations and shocks generated in the pipeline system, protect the expansion valve and other equipment from damage, and improve the stability and reliability of the system.

[0036] The sealing mechanism 50 includes an annular groove 51 provided on the mounting port 3, an annular boss 52 matching the annular groove 51 is connected to one end of the connecting flange 41 close to the annular groove 51, a sealing ring 53 is installed in the annular groove 51, and a sealing ring 2 54 is connected to the outer side of the annular boss 52. A plurality of even-numbered waterproof lines 1 55 are provided on one side of the annular groove 51 close to the annular boss 52, and the waterproof lines 1 55 are spaced apart toward the center of the annular groove 51, a plurality of odd-numbered waterproof lines 2 56 are provided on one side of the annular boss 52 close to the waterproof line 1 55, and the waterproof lines 2 56 are spaced apart toward the center of the annular boss 52, and a waterproof ring 53 matching the waterproof line 1 55 is connected to one end of the sealing ring 53 close to the waterproof line 1 55. Boss one 57, one end of the sealing ring 1 53 close to the waterproof line 2 56 is connected with a waterproof boss two 58 matching the waterproof line two 56, one end of the installation port 3 close to the connecting flange one 41 is provided with a plurality of odd number of waterproof lines three 59, and the waterproof lines three 59 are respectively arranged at intervals toward the center of the installation port 3, one end of the connecting flange one 41 close to the waterproof line three 59 is provided with a plurality of even number of waterproof lines four 5a, and the waterproof lines four 5a are respectively arranged at intervals toward the center of the connecting flange, one end of the sealing ring 2 54 close to the waterproof line three 59 is connected with a waterproof boss three 5b matching the waterproof line three 59, and one end of the sealing ring 2 54 close to the waterproof line four 5a is connected with a waterproof boss four 5c matching the waterproof line four 5a.

[0037] Furthermore, waterproof line 1 55 is installed corresponding to waterproof boss 1 57, waterproof line 2 56 is installed corresponding to waterproof boss 2 58, waterproof line 3 59 is installed corresponding to waterproof boss 3 5b, and waterproof line 4 5a is installed corresponding to waterproof boss 4 5c, forming a multiple sealing structure, improving the sealing performance at both ends of the inlet and outlet pipe 2, and can also effectively prevent liquid from overflowing out of the expansion valve body 1, avoiding corrosion or damage of the expansion valve due to liquid leakage, further improving the sealing effect, and enhancing the overall sealing performance of the expansion valve, effectively preventing leakage of liquid, gas or other media, and forming a multi-layer sealing protection effect.

[0038] The implementation principle of this embodiment is: when in use, the staff uses the corresponding tool to separate the installation port 3 and the connecting flange 41, and drives the connecting flange 41 to drive the elastic metal bellows 43 to shrink, thereby expanding the gap between the installation port 3 and the connecting flange 41, so that the staff can replace the corresponding sealing ring 53 or sealing ring 54, and after replacement, the axial extension of the locking bolt 443 is used to compensate for the gap between the installation port 3 and the connecting flange 41, thereby improving the maintenance convenience of the sealing mechanism 50, and at the same time, it can also compensate for the change in pipeline length caused by temperature change or pressure change, prevent the pipeline from being damaged or deformed due to excessive stress, and absorb the vibration and impact generated in the pipeline system, thereby improving the stability and reliability of the system.

[0039] 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, comprising: An expansion valve body (1), wherein both sides of the expansion valve body (1) are respectively connected to inlet and outlet pipe ports (2), characterized in that one end of the inlet and outlet pipe ports (2) away from the expansion valve body (1) is respectively connected to a mounting port (3), and a side of the mounting port (3) away from the expansion valve body (1) is respectively provided with an expansion joint assembly (40), and a sealing mechanism (50) is respectively connected between the expansion joint assembly (40) and the mounting port (3); The expansion joint assembly (40) comprises a connecting flange 1 (41) and a connecting flange 2 (42), wherein an elastic metal bellows (43) is connected between the connecting flange 1 (41) and the connecting flange 2 (42); A plurality of guide rods (44) are arranged in a circular array between the outer circles of the connecting flange 1 (41) and the connecting flange 2 (42).

2. An expansion valve according to claim 1, characterized in that: The sealing mechanism (50) comprises an annular groove (51) formed on the mounting port (3); an end of the connecting flange 1 (41) close to the annular groove (51) is connected to an annular boss (52) adapted thereto; a sealing ring 1 (53) is installed in the annular groove (51); and a sealing ring 2 (54) is connected to the outer side of the annular boss (52).

3. An expansion valve according to claim 2, characterized in that: A plurality of even-numbered waterproof lines (55) are provided on one side of the annular groove (51) close to the annular boss (52), and the waterproof lines (55) are spaced apart toward the center of the annular groove (51); a plurality of odd-numbered waterproof lines (56) are provided on one side of the annular boss (52) close to the waterproof line (55), and the waterproof lines (56) are spaced apart toward the center of the annular boss (52); one end of the sealing ring (53) close to the waterproof line (55) is connected to a waterproof boss (57) matching the waterproof line (55); and one end of the sealing ring (53) close to the waterproof line (56) is connected to a waterproof boss (58) matching the waterproof line (56).

4. An expansion valve according to claim 3, characterized in that: The installation port (3) is provided with a plurality of odd-numbered waterproof lines three (59) at one end close to the connection flange one (41), and the waterproof lines three (59) are respectively arranged at intervals toward the center of the installation port (3); the connection flange one (41) is provided with a plurality of even-numbered waterproof lines four (5a) at one end close to the waterproof line three (59), and the waterproof lines four (5a) are respectively arranged at intervals toward the center of the connection flange; the sealing ring two (54) is connected to a waterproof boss three (5b) matching the waterproof line three (59) at one end close to the waterproof line three (59); and the sealing ring two (54) is connected to a waterproof boss four (5c) matching the waterproof line four (5a) at one end close to the waterproof line four (5a).

5. An expansion valve according to claim 1, characterized in that: The guide rod (44) comprises a mounting seat 1 (441) mounted on the connecting flange 1 (41) and a mounting seat 2 (442) mounted on the connecting flange 2 (42), wherein a locking bolt (443) is connected between the mounting seat 1 (441) and the mounting seat 2 (442).

6. An expansion valve according to claim 1, characterized in that: An electroplated anti-corrosion conical transition section (6) is provided on the inner side of the inlet and outlet pipe opening (2), and a larger circle of the electroplated anti-corrosion conical transition section (6) is arranged close to the expansion joint assembly (40).

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