Four-way reversing valve

Abstract

The utility model relates to the field of anti-leakage structures, in particular to a four-way reversing valve. The technical problems that according to an existing four-way reversing valve connecting structure, sealing glue is usually adopted for sealing at the sleeving position, the sealing glue is prone to falling off after a long time, the sealing effect is affected, and gas leakage is caused are solved, and compared with a traditional four-way reversing valve connecting structure, the sealing glue is not prone to falling off. Comprising a valve body assembly, a first leakage-proof assembly, a second leakage-proof assembly and connecting pipes, and a first reversing pipe, a second reversing pipe, a third reversing pipe and a fourth reversing pipe of the valve body assembly can be connected with the corresponding connecting pipes in a sealed mode through the first leakage-proof assembly and the second leakage-proof assembly which are provided with various sealing structures. Multiple sealing structures are arranged, multiple sealing can be achieved, so that gas leakage is not prone to occurring, the first leakage-proof assembly and the second leakage-proof assembly are arranged to be of a detachable connection structure, disassembly and replacement are convenient, and more convenience and practicability are achieved.

Description

Technical Field

[0001] The utility model relates to the field of anti-leakage structures, in particular to a four-way reversing valve. Background Art

[0002] The four-way reversing valve is a key component in heat pump air conditioners. It plays the role of switching between cooling and heating in the refrigeration system. It achieves the purpose of cooling and heating by changing the direction of the compressor exhaust pipe and the return air pipe entering the evaporator and condenser. The function of the four-way reversing valve connection structure is mainly to change the flow direction of the refrigerant, thereby realizing the conversion between the two different modes of cooling and heating. Therefore, the four-way reversing valve connection structure plays a vital role in the two modes of cooling and heating. The existing four-way reversing valve connection structure usually uses sealant to seal the socket part. Over time, the sealant is likely to fall off, affecting the sealing effect and causing gas leakage. Utility Model Content

[0003] In order to overcome the existing four-way reversing valve connection structure, sealant is usually used to seal the sleeve joint. Over time, the sealant is prone to fall off, affecting the sealing effect and causing gas leakage.

[0004] The technical solution of the utility model is: a four-way reversing valve, including a valve body assembly, a first leak-proof assembly, a second leak-proof assembly and a connecting pipe, the end connections of the valve body assembly are all sleeved with a first leak-proof assembly for sealing, the end of the first leak-proof assembly away from the valve body assembly is provided with a second leak-proof assembly for sealing, and the connecting pipe and the valve body assembly are detachably connected through the first leak-proof assembly and the second leak-proof assembly.

[0005] Preferably, by providing a first leak-proof component and a second leak-proof component with a variety of sealing structures, the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube of the valve body assembly can be sealed and connected to the corresponding connecting tubes respectively, so that gas leakage is not easy to occur, and by providing the first leak-proof component and the second leak-proof component as a detachable connection, it is easy to disassemble and replace, which is more convenient and practical. By providing the first leak-proof component, the ends of the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube can be sealed, and by providing the second leak-proof component, the connecting parts of the connecting tube and the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube can be sealed. The first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube with a variety of sealing structures are sealed at the connection with the connecting tube to achieve multiple seals, so that the gas inside the pipeline is not easy to leak out, and the anti-leakage effect is better than that of the traditional four-way reversing valve connection structure.

[0006] Preferably, the valve body assembly includes a main valve, a first reversing tube, a second reversing tube, a third reversing tube, a fourth reversing tube and a first sealing layer, a first reversing tube for connecting to a high-pressure exhaust pipe is provided in the middle of the rear end of the main valve, a second reversing tube for connecting to an air intake port of a compressor is provided in the middle of the front end of the main valve, a third reversing tube for connecting to an air inlet of a condenser is provided on the left side of the second reversing tube, a fourth reversing tube for connecting to an air outlet of an evaporator is provided on the right side of the second reversing tube, and a first sealing layer for sealing is provided on the inner side of an end of the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube away from the main valve, and by providing the first sealing layer, the inner side of the socket connection portion between the connecting tube and the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube can be sealed.

[0007] Preferably, the first leakage-proof component includes a first sealing sleeve, a threaded head, a second sealing sleeve, a fixing sleeve, a second sealing layer, a first sealing ring and a second sealing ring. The first sealing sleeve is provided with a threaded head for threaded connection with the second sealing sleeve at one end close to the second sealing sleeve, and a second sealing layer for sealing is provided on the inner side of the threaded head. The first sealing sleeve is provided with a first sealing ring for sealing at one end away from the threaded head. A plurality of fixing holes for fixing the second leakage-proof component are arranged around the surface edge of the first sealing ring. By arranging the second sealing layer on the inner side of the threaded head, sealing can be performed from the inside.

[0008] Preferably, a fixing sleeve for increasing the sealing performance of the second sealing sleeve is provided at one end of the second sealing sleeve away from the first sealing sleeve, and a second sealing ring for sealing is provided at the connection between the fixing sleeve and the second sealing sleeve. By providing the first sealing ring and the second sealing ring, the two ends of the first sealing sleeve can be sealed respectively.

[0009] Preferably, the second leakage-proof component includes a third sealing sleeve, a fixing block, a third sealing ring, a third sealing layer, a first splint, a second splint, a connecting column, a bolt and a protective layer. The third sealing sleeve is provided with a fixing block for installing and fixing the third sealing sleeve at one end close to the first leakage-proof component, and a third sealing ring for increasing the sealing performance is provided at one end of the fixing block away from the third sealing sleeve. Mounting holes matching the fixing holes are provided around the sides of the fixing block. By providing the mounting holes and the fixing holes, a detachable connection between the first leakage-proof component and the second leakage-proof component can be achieved.

[0010] Preferably, a third sealing layer for sealing is fitted on the inner side of the third sealing sleeve, the first clamping plate and the third sealing sleeve are fixedly connected by multiple groups of surrounding connecting columns, and a second clamping plate for cooperating with the first clamping plate to fix the connecting pipe is provided under the first clamping plate. The stability of the connection between the third sealing sleeve and the first sealing sleeve can be enhanced by clamping the connecting pipe with the first clamping plate and the second clamping plate.

[0011] Preferably, the left and right ends of the first splint and the second splint are both connected by two sets of symmetrically arranged bolts, and the ends of the first splint and the second splint close to each other are both fitted with a protective layer for protecting the connecting pipe. By providing a protective layer on the inner sides of the first splint and the second splint to protect the connecting pipe, damage to the connecting pipe due to excessive clamping force can be avoided.

[0012] Beneficial effects of the utility model:

[0013] 1. Compared with the traditional four-way reversing valve connection structure, which can usually only be used for a certain specific inspection, and usually uses sealant to seal the sleeve joint, it is easy to cause the sealant to fall off over time, affecting the sealing effect, resulting in gas leakage. By setting a first leak-proof component and a second leak-proof component with multiple sealing structures, the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube of the valve body assembly can be sealed and connected with the corresponding connecting tubes respectively, so that gas leakage is not easy to occur, and by setting the first leak-proof component and the second leak-proof component to be detachably connected, it is easy to disassemble and replace, which is more convenient and practical. By setting the first leak-proof component, the ends of the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube can be sealed. The first sealing sleeve and the second sealing sleeve are provided to cover the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube. The second sealing layer is provided on the inner side of the threaded head to seal from the inside. The first sealing ring and the second sealing ring are provided to seal the two ends of the first sealing sleeve respectively. The second sealing layer, the first sealing ring and the second sealing ring cooperate with each other to achieve multi-angle sealing, thereby greatly improving the sealing effect and preventing the gas inside the pipeline from leaking. The first sealing layer is provided on the inner sides of the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube to seal the inner sides of the connecting tube and the first reversing tube, the second reversing tube, the third reversing tube and the fourth reversing tube, thereby achieving a further sealing effect.

[0014] 2. By providing a second leak-proof component, the connection parts between the connecting pipe and the first reversing pipe, the second reversing pipe, the third reversing pipe and the fourth reversing pipe can be sealed; by providing a third sealing sleeve, the outer side of the connecting pipe close to the first leak-proof component can be covered; by providing a third sealing layer on the inner side of the third sealing sleeve, it can be sealed from the inside to prevent air leakage; by providing a fixing block at one end of the third sealing sleeve close to the first leak-proof component, it can be connected and fixed with the first leak-proof component; by providing a third sealing ring at one end of the fixing block close to the first leak-proof component, it can cooperate with the first sealing ring to double-seal the connection between the first leak-proof component and the second leak-proof component; by providing an installation hole and a fixing hole, the first leak-proof component and the second leak-proof component can be detachably connected; The first clamping plate and the second clamping plate are arranged at the rear end of the three sealing sleeves to clamp the connecting pipe, thereby increasing the stability of the third sealing sleeve and making it less likely to slide or deviate. By arranging the first clamping plate and the second clamping plate as an adjustable structure fixed by bolts, the tightness of the clamping can be adjusted accordingly according to the actual situation of the connecting pipe, which facilitates the disassembly of the connecting pipe. By arranging a protective layer on the inner side of the first clamping plate and the second clamping plate, the connecting pipe can be protected to avoid damage to the connecting pipe due to excessive clamping force. By arranging a variety of sealing structures, the connection points of the first reversing pipe, the second reversing pipe, the third reversing pipe and the fourth reversing pipe with the connecting pipe are sealed and connected to achieve multiple sealing, so that the gas inside the pipeline is not easy to leak out, and the anti-leakage effect is better than that of the traditional four-way reversing valve connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 What is shown is an overall schematic diagram of the four-way reversing valve of the utility model;

[0016] Figure 2 Shown is a schematic diagram of a connecting pipe in a four-way reversing valve of the present invention;

[0017] Figure 3 Shown is a schematic diagram of a valve body assembly in a four-way reversing valve of the present utility model;

[0018] Figure 4 Shown is a schematic diagram of a first anti-leakage component in a four-way reversing valve of the utility model;

[0019] Figure 5 Shown is a schematic diagram of the second sealing layer in the four-way reversing valve of the utility model;

[0020] Figure 6 Shown is a schematic diagram of the second anti-leakage component in the four-way reversing valve of the utility model.

[0021] Explanation of the accompanying drawings: 1. valve body assembly; 2. first leak-proof assembly; 3. second leak-proof assembly; 4. connecting pipe; 101. main valve; 102. first reversing pipe; 103. second reversing pipe; 104. third reversing pipe; 105. fourth reversing pipe; 106. first sealing layer; 201. first sealing sleeve; 202. threaded head; 203. second sealing sleeve; 204. fixing sleeve; 205. second sealing layer; 206. first sealing ring; 207. fixing hole; 208. second sealing ring; 301. third sealing sleeve; 302. fixing block; 303. third sealing ring; 304. mounting hole; 305. third sealing layer; 306. first clamp; 307. second clamp; 308. connecting column; 309. bolt; 310. protective layer. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] See also Figure 1-2 The utility model provides an embodiment: a four-way reversing valve, comprising a valve body assembly 1, a first leak-proof assembly 2, a second leak-proof assembly 3 and a connecting pipe 4, the end connections of the valve body assembly 1 are all sleeved with a first leak-proof assembly 2 for sealing, the end of the first leak-proof assembly 2 away from the valve body assembly 1 is provided with a second leak-proof assembly 3 for sealing, and the connecting pipe 4 is detachably connected to the valve body assembly 1 through the first leak-proof assembly 2 and the second leak-proof assembly 3.

[0024] See also Figure 3 In this embodiment, the valve body assembly 1 includes a main valve 101, a first reversing tube 102, a second reversing tube 103, a third reversing tube 104, a fourth reversing tube 105 and a first sealing layer 106. The first reversing tube 102 for connecting to the high-pressure exhaust pipe is provided in the middle of the rear end of the main valve 101, the second reversing tube 103 for connecting to the compressor suction port is provided in the middle of the front end of the main valve 101, and the third reversing tube 104 for connecting to the condenser inlet is provided on the left side of the second reversing tube 103. A fourth reversing tube 105 for connecting to the evaporator air outlet is provided on the right side of the second reversing tube 103, and a first sealing layer 106 for sealing is provided on the inner side of one end of the first reversing tube 102, the second reversing tube 103, the third reversing tube 104 and the fourth reversing tube 105 away from the main valve 101. By providing the first sealing layer 106, the inner side of the socket connection portion between the connecting tube 4 and the first reversing tube 102, the second reversing tube 103, the third reversing tube 104 and the fourth reversing tube 105 can be sealed.

[0025] See also Figure 4-5In this embodiment, the first leakage-proof component 2 includes a first sealing sleeve 201, a threaded head 202, a second sealing sleeve 203, a fixing sleeve 204, a second sealing layer 205, a first sealing ring 206 and a second sealing ring 208. The end of the first sealing sleeve 201 close to the second sealing sleeve 203 is provided with a threaded head 202 for threaded connection with the second sealing sleeve 203, the inner side of the threaded head 202 is fitted with a second sealing layer 205 for sealing, the end of the first sealing sleeve 201 away from the threaded head 202 is provided with a first sealing ring 206 for sealing, and the first sealing A plurality of fixing holes 207 for fixing the second anti-leakage component 3 are arranged around the surface edge of the ring 206. A second sealing layer 205 is arranged on the inner side of the threaded head 202 to seal from the inside. A fixing sleeve 204 for increasing the sealing performance of the second sealing sleeve 203 is arranged at one end of the second sealing sleeve 203 away from the first sealing sleeve 201. A second sealing ring 208 for sealing is arranged at the connection between the fixing sleeve 204 and the second sealing sleeve 203. The first sealing ring 206 and the second sealing ring 208 can be arranged to seal the two ends of the first sealing sleeve 201 respectively.

[0026] See also Figure 6 In this embodiment, the second leakage-proof component 3 includes a third sealing sleeve 301, a fixing block 302, a third sealing ring 303, a third sealing layer 305, a first clamping plate 306, a second clamping plate 307, a connecting column 308, a bolt 309 and a protective layer 310. The third sealing sleeve 301 is provided with a fixing block 302 for installing and fixing the third sealing sleeve 301 at one end close to the first leakage-proof component 2, and a third sealing ring 303 for increasing the sealing performance is provided at one end of the fixing block 302 away from the third sealing sleeve 301. The side of the fixing block 302 is surrounded by a mounting hole 304 matching the fixing hole 207. By providing the mounting hole 304 and the fixing hole 207, the first leakage-proof component 2 and the second leakage-proof component 3 can be detachably connected. The inner side of the third sealing sleeve 301 is fitted with a third sealing layer 3 for sealing. 05. The first clamping plate 306 is fixedly connected to the third sealing sleeve 301 by a plurality of groups of surrounding connecting columns 308. A second clamping plate 307 for cooperating with the first clamping plate 306 to fix the connecting pipe 4 is provided below the first clamping plate 306. The stability of the connection between the third sealing sleeve 301 and the first sealing sleeve 201 can be enhanced by clamping the connecting pipe 4 by the first clamping plate 306 and the second clamping plate 307. The left and right ends of the first clamping plate 306 and the second clamping plate 307 are both adjusted and connected by two groups of symmetrically arranged bolts 309. The ends of the first clamping plate 306 and the second clamping plate 307 that are close to each other are both fitted with a protective layer 310 for protecting the connecting pipe 4. By arranging the protective layer 310 on the inner sides of the first clamping plate 306 and the second clamping plate 307 to protect the connecting pipe 4, it can be avoided that the connecting pipe 4 is damaged due to excessive clamping force.

[0027] When working, firstly, the first sealing sleeve 201 and the second sealing sleeve 203 are sequentially sleeved on the outer sides of the first reversing tube 102, the second reversing tube 103, the third reversing tube 104 and the fourth reversing tube 105;

[0028] Then tighten the bolt 309 to adjust the distance between the first clamping plate 306 and the second clamping plate 307 to a suitable size, and pass the connecting pipe 4 through the first clamping plate 306 and the second clamping plate 307 and the third sealing sleeve 301 in sequence, and continue to move forward until a part of the connecting pipe 4 is covered by the first reversing tube 102, the second reversing tube 103, the third reversing tube 104 and the fourth reversing tube 105, so that the outer side of the connecting pipe 4 is tightly fitted with the first sealing layer 106 on the inner side of the first reversing tube 102, the second reversing tube 103, the third reversing tube 104 and the fourth reversing tube 105;

[0029] Then move the third connecting sleeve to the outside of the fixing block 302 so that the third sealing ring 303 is attached to the outside of the first sealing ring 206 of the first sealing sleeve 201, and the fixing plate is fixed to the first sealing sleeve 201 through the mounting hole 304 and the fixing hole 207;

[0030] Then, the second sealing sleeve 203 is moved to a suitable position, and the second sealing sleeve 203 is screwed to be threadedly connected with the thread head 202 of the first sealing sleeve 201, until the second sealing ring 208 and the thread head 202 are tightly fitted together, so that the first sealing sleeve 201 and the second sealing sleeve 203 are fixed together;

[0031] Finally, the bolt 309 is tightened to clamp the connecting pipe 4 with the first clamping plate 306 and the second clamping plate 307, so that the protective layer 310 inside the first clamping plate 306 and the second clamping plate 307 fits tightly with the connecting pipe 4, so that the third sealing sleeve 301 is fixed.

[0032] Through the above steps, the staff firstly puts the first sealing sleeve 201 and the second sealing sleeve 203 on the outside of the first reversing tube 102, the second reversing tube 103, the third reversing tube 104 and the fourth reversing tube 105 in sequence, then tightens the bolt 309 to adjust the distance between the first clamping plate 306 and the second clamping plate 307 to a suitable size, and passes the connecting tube 4 through the first clamping plate 306 and the second clamping plate 307 and the third sealing sleeve 301 in sequence, and continues to move forward until a part of the connecting tube 4 is covered by the first reversing tube 102, the second reversing tube 103, the third reversing tube 104 and the fourth reversing tube 105, so that the outside of the connecting tube 4 is in contact with the first reversing tube 10 2. The first sealing layer 106 on the inner sides of the second reversing tube 103, the third reversing tube 104 and the fourth reversing tube 105 are closely fitted, and then the third connecting sleeve is moved to the third sealing ring 303 on the outer side of the fixing block 302 thereof and is fitted with the first sealing ring 206 on the outer side of the first sealing sleeve 201, and the fixing plate is fixed to the first sealing sleeve 201 through the mounting hole 304 and the fixing hole 207, and the second sealing layer 205 is provided on the inner side of the threaded head 202 to seal from the inside, and the first sealing ring 206 and the second sealing ring 208 are provided to seal the two ends of the first sealing sleeve 201 respectively, and the first sealing ring 206 and the third sealing ring are used to seal the first sealing sleeve 201. The sealing ring 303 can double seal the connection between the first leak-proof component 2 and the second leak-proof component 3. Under the mutual cooperation of the second sealing layer 205, the first sealing ring 206, the second sealing ring 208 and the third sealing ring 303, multi-angle sealing can be achieved, thereby greatly improving the sealing effect. Then, the second sealing sleeve 203 is moved to a suitable position, and the second sealing sleeve 203 is screwed to be threadedly connected with the threaded head 202 of the first sealing sleeve 201 until the second sealing ring 208 and the threaded head 202 are tightly fitted together, so that the first sealing sleeve 201 and the second sealing sleeve 203 are fixed together. Finally, by screwing the bolt 309, The first clamping plate 306 and the second clamping plate 307 clamp the connecting tube 4, so that the protective layer 310 on the inner side of the first clamping plate 306 and the second clamping plate 307 fits tightly with the connecting tube 4, so that the third sealing sleeve 301 is fixed. By setting the second sealing sleeve 203 to seal and fix the first sealing sleeve 201, and by fixing the third sealing sleeve 301 with the first clamping plate 306 and the second clamping plate 307, a double fixing effect can be achieved, thereby greatly improving the connection stability of the first leakage-proof component 2 and the second leakage-proof component 3, and by setting a sealing structure on both the inside and the outside, the sealing effect can be further improved, thereby making the anti-leakage effect better.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A four-way reversing valve, comprising a valve body assembly (1); characterized in that: It also comprises a first leak-proof component (2), a second leak-proof component (3) and a connecting pipe (4); the end connection of the valve body component (1) is sleeved with the first leak-proof component (2) for sealing; the end of the first leak-proof component (2) away from the valve body component (1) is provided with a second leak-proof component (3) for sealing; the connecting pipe (4) and the valve body component (1) are detachably connected via the first leak-proof component (2) and the second leak-proof component (3).

2. A four-way reversing valve according to claim 1, characterized in that: The valve body assembly (1) comprises a main valve (101), a first reversing tube (102), a second reversing tube (103), a third reversing tube (104), a fourth reversing tube (105) and a first sealing layer (106); a first reversing tube (102) for connecting to a high-pressure exhaust pipe is provided at the middle of the rear end of the main valve (101); a second reversing tube (103) for connecting to an air intake port of a compressor is provided at the middle of the front end of the main valve (101); a third reversing tube (104) for connecting to an air inlet of a condenser is provided on the left side of the second reversing tube (103); a fourth reversing tube (105) for connecting to an air outlet of an evaporator is provided on the right side of the second reversing tube (103); and a first sealing layer (106) for sealing is provided on the inner sides of the ends of the first reversing tube (102), the second reversing tube (103), the third reversing tube (104) and the fourth reversing tube (105) away from the main valve (101).

3. A four-way reversing valve according to claim 1, characterized in that: The first anti-leakage component (2) comprises a first sealing sleeve (201), a threaded head (202), a second sealing sleeve (203), a fixing sleeve (204), a second sealing layer (205), a first sealing ring (206) and a second sealing ring (208); one end of the first sealing sleeve (201) close to the second sealing sleeve (203) is provided with a threaded head (202) for threaded connection with the second sealing sleeve (203); the inner side of the threaded head (202) is provided with a second sealing layer (205) for sealing; one end of the first sealing sleeve (201) away from the threaded head (202) is provided with a first sealing ring (206) for sealing; and a plurality of fixing holes (207) for fixing the second anti-leakage component (3) are arranged around the surface side of the first sealing ring (206).

4. A four-way reversing valve according to claim 3, characterized in that: A fixing sleeve (204) for increasing the sealing performance of the second sealing sleeve (203) is provided at one end of the second sealing sleeve (203) away from the first sealing sleeve (201), and a second sealing ring (208) for sealing is provided at the connection between the fixing sleeve (204) and the second sealing sleeve (203).

5. A four-way reversing valve according to claim 1, characterized in that: The second anti-leakage component (3) comprises a third sealing sleeve (301), a fixing block (302), a third sealing ring (303), a third sealing layer (305), a first clamping plate (306), a second clamping plate (307), a connecting column (308), a bolt (309) and a protective layer (310). The fixing block (302) for mounting and fixing the third sealing sleeve (301) is provided at one end of the third sealing sleeve (301) close to the first anti-leakage component (2), and the third sealing ring (303) for improving the sealing performance is provided at one end of the fixing block (302) away from the third sealing sleeve (301). A mounting hole (304) matching the fixing hole (207) is provided around the side of the fixing block (302).

6. A four-way reversing valve according to claim 5, characterized in that: A third sealing layer (305) for sealing is provided on the inner side of the third sealing sleeve (301); the first clamping plate (306) is fixedly connected to the third sealing sleeve (301) via a plurality of groups of surrounding connecting columns (308); and a second clamping plate (307) for cooperating with the first clamping plate (306) to fix the connecting pipe (4) is provided below the first clamping plate (306).

7. A four-way reversing valve according to claim 6, characterized in that: The left and right ends of the first clamping plate (306) and the second clamping plate (307) are both adjusted and connected by two sets of symmetrically arranged bolts (309), and the ends of the first clamping plate (306) and the second clamping plate (307) close to each other are both fitted with a protective layer (310) for protecting the connecting pipe (4).

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