Stop valve

Abstract

The utility model provides a stop valve. The structure of the stop valve is improved, so that the welding strength between a filling connector and a valve body is remarkably improved. The stop valve comprises a valve body and a filling connector, a connecting hole part is formed in the valve body, and an annular stop wall is arranged on the inner hole wall of the connecting hole part. The filling connector is provided with an inserting end inserted into the connecting hole part, the inserting end is provided with a step structure, and a material containing cavity is defined by the step structure, part of the stop wall and part of the inner hole wall; the inserting end is further provided with an outer side wall extending in the axial direction and an end wall extending in the radial direction, the outer side wall and the inner hole wall define a second welding flux melting channel, the end wall and part of the stop wall define a first welding flux melting channel, the first welding flux melting channel and the second welding flux melting channel are both communicated with the material containing cavity, and the first welding flux melting channel and the second welding flux melting channel are communicated with the material containing cavity. The first welding flux melting channel, the second welding flux melting channel and at least part of the material containing cavity are filled with welding flux. By the adoption of the technical scheme, the welding strength between the valve body and the filling connector is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration equipment technical field, specifically, relate to a stop valve. BACKGROUND

[0002] In the manufacture and maintenance process of air conditioning system, the stop valve as a key component plays an important role in controlling the flow of refrigerant and performing system maintenance (such as vacuumizing and charging refrigerant). Such stop valve usually includes a valve body and a charging connector connected thereto. The charging connector is also provided with a valve core to enable access to external equipment to achieve vacuumizing and refrigerant charging of the system. In order to ensure the sealing of the system after operation, the charging cap is tightened on the charging connector with a certain torque to form a hard seal to prevent refrigerant leakage and external air from entering.

[0003] The charging connector and the valve body are connected by welding, but the welding strength between the charging connector and the valve body is low. During the tightening of the charging cap, if the welding strength is insufficient, the charging connector may be accidentally detached or twisted off from the valve body under the action of torque. SUMMARY

[0004] The utility model aims at providing a stop valve which significantly improves the welding strength between the charging connector and the valve body by improving the structure of the stop valve.

[0005] To achieve the above-mentioned purpose, the utility model provides a stop valve, which comprises a valve body and a charging connector. The valve body is provided with a connecting hole portion, and the inner hole wall of the connecting hole portion is provided with an annular stop wall. The charging connector has a plug-in end which is plugged into the connecting hole portion. The plug-in end is provided with a stepped structure. The stepped structure, part of the stop wall and part of the inner hole wall enclose a material containing cavity. The plug-in end also has an axially extending outer side wall and a radially extending end wall. The outer side wall and the inner hole wall enclose a second solder channel, and the end wall and part of the stop wall enclose a first solder channel. The first solder channel and the second solder channel are both in communication with the material containing cavity, and at least part of the first solder channel, the second solder channel and the material containing cavity are filled with solder.

[0006] By adopting the technical scheme of the utility model, the stepped structure provided on the plug-in end forms a material containing cavity which can prevent the solder in the material containing cavity from flowing randomly. By providing the first solder channel and the second solder channel which are in communication with the material containing cavity, the solder can be infiltrated into the first solder channel and the second solder channel through the principle of capillary pore adsorption, thereby increasing the welding area of the valve body and the charging connector without increasing the original size of the valve body and the charging connector, and effectively increasing the welding strength between the valve body and the charging connector.

[0007] Optionally, the stop wall has a first region and a second region, the first region is located radially inside the second region; the step structure has a step wall parallel to the stop wall, the first region and the step wall constitute part of the cavity wall of the material cavity; the end wall of the plug-in end and the second region enclose the first solder channel.

[0008] In this way, the material cavity is located radially on the inner side of the stop wall, and the first solder channel is located on the outer side of the material cavity, thereby ensuring that the solder in the material cavity can effectively infiltrate between the filling connector and the valve body when it infiltrates outward, thereby ensuring the utilization rate of the solder.

[0009] Optionally, there are a plurality of second solder channels, and the plurality of second solder channels are distributed at intervals in the circumferential direction; each second solder channel is located on the outer side wall of the plug-in end; or each second solder channel is located on the inner hole wall of the connecting hole part; or part of each second solder channel is located on the outer side wall and part is located on the inner hole wall. By providing a plurality of second solder channels, the molten solder can be guided, so that the solder can infiltrate between the valve body and the filling connector in the axial direction and the axial direction, thereby improving the welding strength of the two.

[0010] Optionally, there are a plurality of first solder channels, and the plurality of first solder channels are distributed at intervals in the circumferential direction; each first solder channel is located on the step wall; or each first solder channel is located on the stop wall; or part of each first solder channel is located on the step wall and part is located on the stop wall. By providing a plurality of first solder channels, the molten solder can be guided, so that the solder can infiltrate between the valve body and the filling connector in the axial direction and the axial direction, thereby improving the welding strength of the two.

[0011] Optionally, the inner radial side of the end wall is located radially inward of the stop wall. In this way, the first solder channel can be distributed along the radial direction of the end wall, ensuring the radial size of the first solder channel.

[0012] Optionally, a first chamfer is arranged at the position where the step wall and the outer side wall meet, and the first chamfer is arranged around the plug-in end. By providing the first chamfer, the molten solder can be further guided.

[0013] Optionally, the step structure further includes a connecting wall connecting the step wall and the end wall, and a second chamfer is arranged at the position where the connecting wall and the end wall meet, and the second chamfer is arranged around the plug-in end. By providing the second chamfer, the molten solder can be further guided.

[0014] Optionally, the first solder channel extends in a radial direction, the second solder channel extends in an axial direction, and the solder cavity is located between the first solder channel and the second solder channel. In this way, the solder in the solder cavity is infiltrated in two directions, and is infiltrated to the position where the valve body and the filling connector meet, thereby improving the utilization rate of the solder.

[0015] Optionally, the first solder channel has an axial dimension of 0.02mm-0.10mm. In this dimension range, the first solder channel and the second solder channel can be filled with sufficient solder.

[0016] Optionally, the axial dimension of the first solder channel is smaller than the axial dimension of the solder cavity. In this way, the first solder channel and the second solder channel can be filled with sufficient solder.

[0017] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present specification and, together with the description, serve to explain the principles of the present specification.

[0019] Figure 1 is an axial side view of a stop valve in the prior art;

[0020] Figure 2 is a radial side view of a stop valve in the prior art;

[0021] Figure 3 is Figure 2 is an enlarged schematic view of I part of

[0022] Figure 4 is a radial side view of a medium valve in the embodiment of the present utility model;

[0023] Figure 5 is Figure 4 is an enlarged schematic view of I part of

[0024] Figure 6 is a structural schematic view of a filling connector.

[0025] Reference Signs:

[0026] 1-valve body; 11-connection hole part; 11a-inner hole wall; 11b-stop wall; 2-valve rod; 3-seal ring; 4-valve cap; 5-upper connector; 6-lower connector; 7-charging connector; 7a-outer wall; 7b-end wall; 70-step structure; 71-step wall; 72-connection wall; 73-first chamfer; 8-valve core; 9-charging cap; 10-internal thread; 101-first solder channel; 102-second solder channel; 100-welding ring. DETAILED DESCRIPTION

[0027] The utility model provides a stop valve, through the structure of stop valve improvement has improved the welding strength between charging connector and valve body.

[0028] In order to make the personnel of this technical field better understand the utility model scheme, below combining with the specific embodiment and the drawing to the utility model make further detailed explanation.

[0029] Such as " first " and " second " and so on relationship terms are only used to distinguish one from another with the component of same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0030] In traditional technical scheme, such as Figures 1-3 Locking, Figure 1 It is the axial side view of the stop valve in prior art; Figure 2 It is the radial side view of the stop valve in prior art; Figure 3 It is Figure 2 The enlarged schematic view of I part of the stop valve. The stop valve comprises a valve body 1 and a valve cap 4, the valve cap 4 is arranged on the valve body 1 and cooperates with the valve body 1 to form an inner cavity;The valve body 1 is provided with an internal thread 10 for mounting a valve rod 2, the valve rod 2 is threadedly connected with the valve body 1 through the internal thread 10, for controlling the opening and closing of the internal passage of the stop valve;The seal ring 3 is arranged on the contact surface between the valve rod 2 and the valve body 1, or between the valve rod 2 and the valve cap 4, or both, to improve the sealing performance. And with the valve body 1. The stop valve has two interfaces for connecting an upper connector 5 and a lower connector 6, respectively. One end of the upper connector 5 is connected with the valve body 1 by welding, and the other end is used for connecting with the indoor unit of the air conditioner;One end of the lower connector 6 is connected with the valve body 1 by welding, and the other end is used for connecting with the outdoor unit of the air conditioner.

[0031] The valve body 1 is welded with a charging connector 7, which provides an interface for vacuumizing and charging refrigerant for the air conditioning system;The valve core 8 is installed on the charging connector 7, which is used to control the opening and closing of the charging connector 7;The charging cap 9 is tightened on the charging connector 7 with a certain torque, and forms a hard seal with the charging connector 7 to prevent refrigerant leakage.

[0032] The existing welding method of the valve body 1 and the charging connector 7 is furnace welding, specifically, the welding ring 100 is arranged at a set position between the valve body 1 and the charging connector 7, the valve body 1 and the charging connector 7 are placed in a tunnel furnace with gas protection, and then the whole is heated and welded at one time.

[0033] As shown in the figure, it is a conventional welding structure, in the conventional technical solution, the charging connector 7 has a plug-in end, the side wall of the valve body 1 is provided with a connecting hole part 11, the connecting hole part 11 penetrates the valve body 1 along the thickness of the valve body 1 and can be communicated with the valve cavity. The inner hole wall 11a of the connecting hole part 11 has a radial extending stop wall 11b, and the welding ring 100 is installed at the corner position where the inner hole wall 11a and the stop wall 11b meet. The end face of the plug-in end is radially abutted to the inner hole wall 11a of the connecting hole part 11, and axially abutted to the welding ring 100. Thus, a gap B is formed between the plug-in end and the stop wall 11b, and the axial size of the gap B is matched with the axial size of the welding ring 100. In order to ensure the welding quality, the radial size of the welding ring 100 needs to be ensured, so that the axial size of the gap B cannot be reduced.

[0034] During the melting of the welding ring 100, the solder flows randomly along the valve body 1 to the gap B and is wasted. Thus, the welding part A between the outer side wall 7a of the plug-in end and the inner hole wall 11a is insufficient in solder, and welding defects such as porosity, lack of welding, and incomplete weld are caused. The welding part A has a sealing performance hidden danger, and also affects the welding strength of the charging connector 7. When the charging cap 9 is tightened with a large torque, the charging connector 7 has a risk of being unscrewed.

[0035] In order to increase the welding strength and improve the welding quality, the general improvement scheme is to increase the welding length of the charging connector 7 and the valve body 1, which will lead to the increase of the volume of the valve body 1 and the charging connector 7; or to increase the wire diameter of the welding ring 100 (the axial size of the welding ring 100), but since the size of the gap B is matched with the wire diameter of the welding ring 100, even if the wire diameter of the welding ring 100 is increased, the insufficient soldering still occurs.

[0036] Please refer to Figures 4 to 6 , Figure 4 is a radial side sectional view of the medium valve in the embodiment of the utility model; Figure 5 is Figure 4 is an enlarged schematic view of the I part of the medium valve; Figure 6 is a structural schematic view of the charging connector 7.

[0037] Different from the prior art, the plug-in end of the filling connector 7 is provided with a stepped structure 70, which has a stepped wall 71 parallel to the stop wall 11b and further includes a connecting wall 72 connecting the stepped wall 71 and the end wall 7b. The stepped wall 71 extends in the radial direction and is away from the stop wall 11b compared with the end wall 7b, that is, the stepped wall 71 is spaced apart from the stop wall 11b in the axial direction. The connecting wall 72 extends in the axial direction, and the radial dimension of the connecting wall 72 is smaller than the radial dimension of the outer side wall 7a of the plug-in end. The stop wall 11b, the connecting wall 72 and the part of the stop wall 11b and the part of the inner hole wall 11a of the stepped structure 70 enclose a material containing cavity.

[0038] The material containing cavity is in a ring structure and is arranged around the circumferential direction of the plug-in end and the inner hole wall 11a, and is located at the corner position where the stop wall 11b and the inner hole wall 11a meet.

[0039] The plug-in end further has an axially extending outer side wall 7a and a radially extending end wall 7b, and the outer side wall 7a and the inner hole wall 11a enclose a second solder channel 102. The end wall 7b and the part of the stop wall 11b enclose a radial solder channel 101, and the first solder channel 101 and the second solder channel 102 are both in communication with the material containing cavity.

[0040] In an optional embodiment, the first solder channel 101 extends in the radial direction, the second solder channel 102 extends in the axial direction, and the material containing cavity is located between the first solder channel 101 and the second solder channel 102. Here, the "axial direction" and the "radial direction" include the direction coinciding with the axial direction / radial direction, and also include the direction extending at an angle relative to the axial direction / radial direction. In addition, the extension shape of the first solder channel 101 and the second solder channel 102 is not only a straight line, but also includes a broken line, an S-shaped line, an arc line and the like. Of course, the second solder channel 102 and the first solder channel 101 can also be a complete surface distributed in the circumferential direction. In this way, the solder in the material containing cavity can be infiltrated in two directions, and both are infiltrated to the position where the valve body 1 and the filling connector 7 meet, thereby improving the utilization rate of the solder.

[0041] In the above embodiment, there are a plurality of second solder channels 102, and the plurality of second solder channels 102 are distributed in the circumferential direction at intervals. Each second solder channel 102 is located at the outer side wall 7a of the plug-in end, and the inner hole wall 11a blocks the mouth of the second solder channel 102. Alternatively, each second solder channel 102 is located at the inner hole wall 11a of the connecting hole 11, and the outer side wall 7a of the plug-in end blocks the mouth of the second solder channel 102. Alternatively, part of each second solder channel 102 is located at the outer side wall 7a, and part of each second solder channel 102 is located at the inner hole wall 11a. By arranging a plurality of second solder channels 102, the molten solder can be guided, so that the solder can be infiltrated in the axial direction and the axial direction between the valve body 1 and the filling connector 7, thereby improving the welding strength of the two.

[0042] In the above embodiment, the stop wall 11b has a first region and a second region, and the first region is located radially inward of the second region. The first region and the step wall 71 constitute part of the cavity wall of the cavity, and the end wall 7b of the plug-in end and the second region enclose the first solder channel 101. In this way, the cavity is located radially inward of the inner ring of the stop wall 11b, and the first solder channel 101 is located radially outward of the cavity, thereby ensuring that the solder in the cavity can effectively wet between the filling joint 7 and the valve body 1 when wetting outward, thereby ensuring the utilization rate of the solder.

[0043] In an alternative embodiment, there are a plurality of first solder channels 101, which are spaced apart in the circumferential direction. Each first solder channel 101 is located on the step wall 71, and the stop wall 11b is used to block the mouth of the first solder channel 101. Alternatively, each first solder channel 101 is located on the stop wall 11b, and the step wall 71 is used to block the mouth of the first solder channel 101. Alternatively, part of each first solder channel 101 is located on the step wall 71, and part of each first solder channel 101 is located on the stop wall 11b. By providing a plurality of first solder channels 101, the molten solder can be guided in the axial direction and the axial direction between the valve body 1 and the filling joint 7, thereby improving the welding strength of the two.

[0044] In any of the above embodiments, the position where the step wall 71 and the outer side wall 7a meet is provided with a first chamfer 73, the first chamfer 73 is arranged around the plug-in end, and each second solder channel 102 is connected to the cavity through the passage enclosed by the annular chamfer. By providing the first chamfer 73, the molten solder can be further guided, and a welding area can be formed in the axial direction around the plug-in end.

[0045] The position where the connecting wall 72 and the end wall 7b meet is provided with a second chamfer, the second chamfer is arranged around the plug-in end, thereby forming a second annular passage around the plug-in end, and the first solder channel 101 communicates with the annular passage.

[0046] As an alternative, the inner radial side of the end wall 7b extends radially inward beyond the stop wall 11b. In this way, the first solder channel 101 can be distributed along the radial direction of the end wall 7b, and the radial dimension of the first solder channel 101 can be ensured.

[0047] In the actual welding process, the welding ring 100 is placed at the corner part where the inner hole wall 11a and the stop wall 11b meet, and then the plug-in end is axially inserted, the stepped wall 71 of the plug-in end is axially pressed against the welding ring 100, and the connecting wall 72 is radially pressed against the inner ring side wall of the welding ring 100, so that the welding ring 100 can be limited in the material cavity. The inner diameter of the welding ring 100 is greater than the radial dimension D of the connecting wall 72, so that the connecting wall 72 can be inserted into the inside of the welding ring 100.

[0048] The axial dimension of the welding ring 100 is greater than the axial dimension L of the connecting wall 72, and the difference between the axial dimensions is consistent with the axial dimension of the second solder fillet 102. That is, the welding ring 100 also limits the plug-in depth of the plug-in end to ensure that the second solder fillet 102 has a set axial dimension. Specifically, the axial dimension of the first solder fillet 101 is smaller than the axial dimension of the material cavity. For example, the axial dimension of the first solder fillet 101 is 0.02mm-0.10mm. Within this size range, the inner solder of the first solder fillet 101 and the second solder fillet 102 can be sufficient.

[0049] Then the stop valve is placed in the welding furnace for welding, and the solder is filled in the first solder fillet 101, the second solder fillet 102 and at least part of the material cavity, so that the valve body 1 and the filling joint 7 are welded in the axial and radial directions, thereby improving the torsional moment capacity of the two and improving the welding strength of the two.

[0050] By adopting the technical scheme of the present application, the step structure 70 is arranged at the plug-in end to form the material cavity, which can prevent the solder in the material cavity from flowing randomly. The first solder fillet 101 and the second solder fillet 102 are arranged in communication with the material cavity, so that the solder can be infiltrated into the first solder fillet 101 and the second solder fillet 102 by capillary adsorption, thereby increasing the welding area of the valve body 1 and the filling joint 7 without increasing the original size of the two, thereby effectively increasing the welding strength between the valve body 1 and the filling joint 7.

[0051] The principles and implementation modes of the present application are described by using specific examples in the present application. The above examples are only used to help understand the core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A stop valve characterized by comprising: The valve body (1) is provided with a connecting hole portion (11) having an inner hole wall (11a) provided with an annular stop wall (11b); the filling connector (7) has a plug-in end inserted into the connecting hole portion (11) and provided with a stepped structure (70), the stepped structure (70), part of the stop wall (11b) and part of the inner hole wall (11a) form a material cavity; The plug-in end is further provided with an axially extending outer side wall (7a) and a radially extending end wall (7b), the outer side wall (7a) and the inner hole wall (11a) form a second solder channel (102), and the end wall (7b) and part of the stop wall (11b) form a first solder channel (101), the first solder channel (101) and the second solder channel (102) are both in communication with the material cavity, and at least part of the first solder channel (101), the second solder channel (102) and the material cavity are filled with solder.

2. The stop valve according to claim 1, characterized by The stop wall (11b) has a first region and a second region, and the first region is located radially outside the second region; The stepped structure (70) has a stepped wall (71) parallel to the stop wall (11b), the first region and the stepped wall (71) form part of the cavity wall of the material cavity, and the end wall (7b) of the plug-in end and the second region form the first solder channel (101).

3. The shut-off valve according to claim 2, characterized in that The stop valve has a plurality of second solder channels (102) which are distributed along the circumference at intervals; Each of the second solder channels (102) is located on the outer side wall (7a) of the plug-in end, or each of the second solder channels (102) is located on the inner hole wall (11a) of the connecting hole portion (11), or part of each of the second solder channels (102) is located on the outer side wall (7a) and part of each of the second solder channels (102) is located on the inner hole wall (11a).

4. The shut-off valve according to claim 2, characterized in that There are a plurality of first solder channels (101) which are distributed along the circumference at intervals; Each of the first solder channels (101) is located on the stepped wall (71), or each of the first solder channels (101) is located on the stop wall (11b), or part of each of the first solder channels (101) is located on the stepped wall (71) and part of each of the first solder channels (101) is located on the stop wall (11b).

5. The shut-off valve according to claim 2, characterized in that The inner radial side of the end wall (7b) is radially inward of the stop wall (11b).

6. The shut-off valve according to claim 2, characterized in that The position where the stepped wall (71) and the outer side wall (7a) meet is provided with a first chamfer (73) which surrounds the plug-in end.

7. The shut-off valve according to claim 2, characterized in that The stepped structure (70) further includes a connecting wall (72) connecting the stepped wall (71) and the end wall (7b), and the position where the connecting wall (72) and the end wall (7b) meet is provided with a second chamfer which surrounds the plug-in end.

8. The stop valve according to any one of claims 1 to 7, characterized by The first solder runner (101) extends in a radial direction, and the second solder runner (102) extends in an axial direction; the solder storage cavity is located between the first solder runner (101) and the second solder runner (102).

9. The stop valve according to any one of claims 1 to 7, characterized by The axial dimension of the first solder runner (101) is 0.02mm-0.10mm.

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