End cover structure of four-way reversing valve

Abstract

The end cover structure of the four-way reversing valve comprises an end cover body, a through hole is formed in the side wall of the end cover body, a connecting pipe is arranged at the position, outside the through hole, of the end cover body, a plurality of deformation grooves are evenly formed in the outer end of the connecting pipe in the circumferential direction, and a fixing piece is formed between every two adjacent deformation grooves. And one end of the capillary tube can be clamped and inserted between the multiple fixing pieces, the outer end of the connecting tube is sleeved with a sealing sleeve in the circumferential direction, and the inner circumferential side of the sealing sleeve can be tightly attached to the outer circumferential side of the connecting tube and the outer circumferential side of the capillary tube. The end cover has the effect of improving the sealing performance of the capillary tube and the end cover body.

Description

Technical Field

[0001] This application relates to the field of four-way directional valve technology, and in particular to an end cap structure for a four-way directional valve. Background Technology

[0002] The four-way directional valve mainly consists of an electromagnetic coil, a pilot valve, and a main valve. The main valve includes a piston assembly, a valve body, and two end caps. The two end caps are installed at both ends of the valve body. The piston assembly is located inside the valve body. Capillary tubes are fixed to the side walls of the end caps. Under the control of the pilot valve, air can be introduced into the end caps through the capillary tubes, thereby pushing the piston assembly to move back and forth within the valve body. When assembling the end caps and capillary tubes, through holes of equal diameter are opened on the peripheral wall of the end caps. During welding, the through holes of the end caps are in a horizontal state. Then, the capillary tubes are horizontally inserted into the through holes, forming a ring structure with the same gap between the capillary tubes and the peripheral wall of the through holes. The solder penetrates from the outside to the inside of the end caps. Due to the influence of gravity, the solder tends to flow downwards during the flow process. This can easily cause poor penetration at the upper end of the weld, that is, the amount of solder at the upper end of the weld is relatively less than that at the lower end, resulting in insufficient penetration and thus the risk of external leakage. Utility Model Content

[0003] The purpose of this utility model is to provide an end cap structure for a four-way reversing valve, addressing the defects and shortcomings of existing technologies.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The device includes an end cap body, the side wall of which has a through hole. A connecting tube is provided outside the through hole. Multiple deformation grooves are evenly provided on the outer circumference of the connecting tube. A fixing piece is formed between two adjacent deformation grooves. One end of a capillary tube can be snapped into the multiple fixing pieces. A sealing sleeve is provided on the outer circumference of the connecting tube. The inner circumference of the sealing sleeve can be tightly fitted to the outer circumference of the connecting tube and the capillary tube.

[0006] Preferably, a hose clamp is fitted on the outer periphery of the sealing sleeve, and the hose clamp is located between the capillary tube and the connecting tube.

[0007] Preferably, the connecting pipe has a retaining ring on its periphery, and the inner periphery of the sealing sleeve is fitted and fixed to the periphery of the retaining ring.

[0008] Preferably, the inner end of the connecting pipe is provided with two fixing hooks in the circumferential direction, and the inner end of the through hole is provided with a limiting ring for the fixing hooks to restrict their engagement. The side wall of the limiting ring is uniformly provided with through holes for the fixing hooks to pass through.

[0009] Preferably, the outer peripheral side of the connecting pipe is threaded with a locking nut, and the inner sidewall of the locking nut abuts against the outer sidewall of the end cap body.

[0010] Preferably, a sealing ring is fitted around the periphery of the connecting pipe, and the outer periphery of the sealing ring abuts against the periphery of the through hole.

[0011] Preferably, the locking nut has anti-slip stripes on its periphery.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] 1. When assembling the end cap body and the capillary tube, one end of the sealing sleeve is placed on the outer end of the connecting tube. Then, one end of the capillary tube is inserted into the sealing sleeve and abuts against the outer end face of the connecting tube. With the tightening of the sealing sleeve, the capillary tube and the connecting tube can be connected. Then, the hose clamp is placed around the periphery of the sealing sleeve and located between the connecting tube and the capillary tube. After adjusting the hose clamp, the sealing sleeve can be tightened around the periphery of the connecting tube and the capillary tube. In this way, welding is not required, so there will be no uneven distribution of solder, which would result in a lower sealing performance between the capillary tube and the end cap body. The sealing sleeve connects the connecting tube and the capillary tube, and then the hose clamp is used to lock it, thereby improving the sealing performance between the capillary tube and the end cap body.

[0014] 2. When the connecting pipe needs to be installed, insert the end of the connecting pipe with the fixing hook into the through hole, then pass the fixing hook through the through hole, and then rotate the connecting pipe so that the fixing hook hooks onto the side wall of the limiting ring. Then rotate the locking nut until the inner side wall of the locking nut abuts against the side wall of the end cap body, so that the fixing hook abuts against one end of the limiting ring, which improves the convenience of installing the connecting pipe.

[0015] 3. When the locking nut is driven to rotate, the anti-slip stripes make it easy to rotate, thus improving the convenience of rotating the locking nut. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the end cap body and the connecting tube of this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of the end cap body and the connecting tube of this utility model;

[0018] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is an exploded view of the end cap body and connecting pipe of this utility model;

[0020] Figure 5 This is an exploded view of the connecting tube and capillary tube of this utility model.

[0021] In the diagram: 1. End cap body; 2. Through hole; 3. Connecting pipe; 4. Sealing sleeve; 5. Fixing hook; 6. Limiting ring; 7. Perforation; 8. Locking nut; 9. Anti-slip stripe; 10. Annular groove; 11. Sealing ring; 12. Deformation groove; 13. Fixing piece; 14. Hose clamp; 15. Clamping ring; 16. Capillary tube. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] This application discloses an end cap structure for a four-way directional valve.

[0024] Reference Figure 1 and Figure 2 The device includes an end cap body 1, with a through hole 2 on the side wall of the end cap body 1. A connecting tube 3 is inserted into the through hole 2, and a sealing sleeve 4 is fitted around the outer end of the connecting tube 3. One end of the capillary tube 16 is inserted into the sealing sleeve 4 and abuts against the outer end of the connecting tube 3.

[0025] Reference Figure 3 and Figure 4 Two fixing hooks 5 are integrally and evenly arranged on the inner end of the connecting pipe 3. The fixing hooks 5 are inclined outwards. A limiting ring 6 is welded and fixed on the inner circumference of the through hole 2. The diameter of the limiting ring 6 gradually decreases from the outside to the inside. The side wall of the limiting ring 6 has two through holes 7 evenly and evenly arranged on the circumference for the fixing hooks 5 to pass through. When installing the connecting pipe 3, one end of the connecting pipe 3 is inserted into the through hole 2, and the two fixing hooks 5 are passed through the two through holes 7 respectively until the fixing hooks 5 are located at the inner end of the limiting ring 6. Then the connecting pipe 3 is rotated, and the inner side wall of the fixing hook 5 abuts against the side wall of the limiting ring 6, making it difficult for the connecting pipe 3 to be pulled out of the through hole 2.

[0026] Reference Figure 3 and Figure 5 The outer periphery of the connecting pipe 3 is threaded with a locking nut 8. The outer periphery of the locking nut 8 has anti-slip stripes 9. One end of the locking nut 8 can abut against the side wall of the end cap body 1. By driving the locking nut 8 to rotate until one end of the locking nut 8 abuts against the side wall of the end cap body 1, the side wall of the fixing hook 5 is pressed against the inner end of the limiting ring 6, which can prevent the connecting pipe 3 from loosening.

[0027] The outer periphery of the connecting pipe 3 is bent to form an annular groove 10, and a sealing ring 11 is embedded and fixed in the annular groove 10. The outer periphery of the sealing ring 11 abuts against the inner periphery of the through hole 2. The sealing ring 11 can increase the sealing between the connecting pipe 3 and the end cap body 1.

[0028] Multiple deformation grooves 12 are evenly distributed on the outer periphery of the connecting pipe 3. A fixing piece 13 is formed between two adjacent deformation grooves 12. One end of the capillary tube 16 is inserted between the fixing pieces 13. The middle part of the sealing sleeve 4 is fitted around the outer periphery of the fixing pieces 13, and the other end of the sealing sleeve 4 is fitted around the outer periphery of the capillary tube 16. A hose clamp 14 is fitted and fixed around the outer periphery of the sealing sleeve 4. The hose clamp 14 is located between the connecting pipe 3 and the capillary tube 16 and locks the fixing pieces 13. One end of the sealing sleeve 4 is fitted around the outer end of the connecting pipe 3. Then, one end of the capillary tube 16 is inserted into the sealing sleeve 4 and abuts against the outer end face of the connecting pipe 3. With the tightening of the sealing sleeve 4, the capillary tube 16 and the connecting pipe 3 can be connected. Then, the hose clamp 14 is fitted around the periphery of the sealing sleeve 4 and located between the connecting pipe 3 and the capillary tube 16. After adjusting the hose clamp 14, the sealing sleeve 4 can be tightened around the periphery of the connecting pipe 3 and the capillary tube 16.

[0029] A clamping ring 15 is integrally provided on the outer periphery of the connecting pipe 3. The vertical cross section of the clamping ring 15 is a right triangle. The clamping ring 15 can tighten the sealing sleeve 4, thereby improving the stability of the sealing sleeve 4 and the connecting pipe 3.

[0030] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An end cover structure of a four-way reversing valve, comprising an end cover body (1), a through hole (2) is formed in the side wall of the end cover body (1), characterized in that: The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12).

2. The end cap structure of a four-way selector valve according to claim 1, wherein The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3).

3. The end cap structure of a four-way selector valve according to claim 1, wherein The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12).

4. The end cap structure of a four-way selector valve according to claim 1, wherein The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3).

5. The end cap structure of a four-way selector valve according to claim 1, wherein The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12).

6. The end cap structure of a four-way selector valve according to claim 1, wherein The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3).

7. The end cap structure of a four-way selector valve according to claim 5, characterized in that The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12). The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3). The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12). The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3). The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12). The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3). The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12). The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3). The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12). The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3). The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12). The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3). The connecting pipe (3) is provided with a plurality of deformation grooves (12) on the outer end, and a fixing sheet (13) is formed between two adjacent deformation grooves (12). The outer periphery of the sealing sleeve (4) is sleeved with a throat clamp (14), and the throat clamp (14) is located between the capillary tube (16) and the connecting pipe (3). The connecting pipe (3)

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