Maintenance valve for refrigeration equipment

Abstract

The utility model provides a service valve for refrigeration equipment, which comprises a valve body, a valve core, a valve bonnet and a connecting pipe, and the valve bonnet is connected to the inlet end of the valve body through a connecting sleeve; a limiting structure is arranged at the position, close to the inlet end of the valve body, of the valve body, an inner hole of the connecting sleeve is of a stepped hole structure, a large-diameter hole of the stepped hole is a threaded hole, the valve body is rotationally sleeved with the connecting sleeve, the limiting structure abuts against the stepped face of the stepped hole, an inserting blind hole is formed in the bottom face of the valve bonnet, and the inlet end of the valve body is inserted into the inserting blind hole. A sealing gasket is arranged between the end face of the inlet end of the valve body and the bottom of the inserting blind hole, and the valve bonnet is inserted into the connecting sleeve and is in threaded connection with the connecting sleeve. According to the structure, the valve bonnet and the valve body are connected through the connecting sleeve and sealed through the sealing gasket, the valve bonnet only moves axially instead of rotating, and therefore the sealing gasket only bears downward pressure and deforms evenly under the action of the downward pressure, the valve body and the valve bonnet are sealed, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve production, in particular to a repair valve for refrigeration equipment. Background Art

[0002] In the existing inspection valve structure for refrigeration equipment, Figure 2 As shown, the valve cap 4 and the valve body 1 are connected by threads, and a sealing gasket 3 is arranged between the valve cap 4 and the valve body 1 to seal the valve body inlet. However, in actual applications, it is found that since the valve cap 4 is rotating while axially moving to press the sealing gasket, the sealing gasket 3 is not only subjected to axial downward pressure, but also to circumferential torsional force, which can easily cause the sealing gasket to twist and deform, resulting in poor sealing. Therefore, in order to improve the sealing effect of the sealing gasket, it is necessary to repeatedly loosen the nut and tighten the nut, which brings inconvenience to the maintenance work.

[0003] At present, in order to achieve a quick sealing connection between the valve cap and the valve body, raw tape is used for secondary sealing at the threaded connection, and the combined effect of the raw tape and the sealing gasket enhances the sealing effect on the valve body. However, the secondary sealing method of the raw tape will cause inconvenience to the subsequent maintenance of the refrigeration equipment. Utility Model Content

[0004] In view of this, the utility model aims to provide a service valve for refrigeration equipment to improve the sealing effect between the service valve bonnet and the valve body.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A service valve for refrigeration equipment, comprising a valve body, a valve core, a valve bonnet and a connecting pipe, wherein the connecting pipe is installed at the outlet end of the valve body, the valve core is arranged in the valve body; the valve bonnet is connected to the inlet end of the valve body through a connecting sleeve;

[0007] The valve body is provided with a limiting structure at a position near its inlet end, the inner hole of the connecting sleeve is a stepped hole structure, the large diameter hole of the connecting sleeve is a threaded hole, the diameter of the small diameter hole corresponds to the outer diameter of the valve body, the connecting sleeve is rotatably sleeved on the valve body, the limiting structure and the step surface of the stepped hole abut, the bottom surface of the valve cap is provided with an insert blind hole, the inlet end of the valve body is inserted into the insert blind hole, and a sealing gasket is provided between the end face of the inlet end of the valve body and the bottom of the insert blind hole, the valve cap is inserted into the connecting sleeve and threadedly connected to the connecting sleeve.

[0008] Furthermore, the limiting structure is a clamping ring structure.

[0009] Furthermore, a mounting groove is provided at the bottom of the insertion blind hole, and the sealing gasket is fixed in the mounting groove.

[0010] Furthermore, a slide groove is provided on the outer circumferential surface at the inlet end of the valve body in the vertical direction, and a key groove is provided on the wall of the blind hole of the valve cap. A key is provided in the key groove, and the key is slidably installed in the slide groove.

[0011] Furthermore, the outer circumferential surface of the valve cap is rolled with a pattern; the outer circumferential surface of the connecting sleeve is rolled with a pattern.

[0012] Furthermore, the inlet of the valve body is provided with an internal thread for connecting to a pipeline of a refrigerant charging device.

[0013] Compared with the prior art, the inspection valve for refrigeration equipment described in the utility model has the following advantages:

[0014] (1) In the structure of the utility model, the valve cap and the valve body are connected by a connecting sleeve and sealed by a sealing gasket. The valve cap simply moves axially instead of rotating. Therefore, the sealing gasket only bears the downward pressure and deforms evenly under the action of the downward pressure to seal the valve body and the valve cap, thereby improving the sealing effect.

[0015] (2) In the present invention, the sliding guide structure formed by the key and the slide groove ensures the stability of the axial movement of the nut and improves the convenience of the connection operation between the connecting sleeve and the valve cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a service valve for refrigeration equipment according to an embodiment of the utility model;

[0018] Figure 2 The structural diagram of the inspection valve for existing refrigeration equipment;

[0019] Description of reference numerals:

[0020] 1-valve body; 11-slide groove; 2-valve core; 3-sealing gasket; 4-valve bonnet; 41-external threaded part; 5-pipe connection; 6-connecting sleeve; 7-clamping ring structure; 8-key. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] like Figure 1As shown, a maintenance valve for refrigeration equipment includes a valve body 1, a valve core 2, a valve cap 4, a pipe 5 and a connecting sleeve 6, wherein the valve core 2 is arranged in the valve body 1, and its principle and structure are prior art, which will not be described in detail here. The pipe 5 is installed at the outlet end of the valve body 1, and the pipe 5 is connected to the pipeline of the refrigeration equipment such as the outdoor unit of the air conditioner, and the valve cap 4 is connected to the inlet end of the valve body 1 through the connecting sleeve 6.

[0023] The inlet of the valve body 1 is provided with an internal thread for connecting to the pipeline of the refrigerant charging equipment. A limiting structure is provided at the upper position of the outer circumferential surface of the valve body 1, i.e., near its inlet end. The limiting structure is a convex block structure or a clamping ring structure 7. The inner hole of the connecting sleeve 6 is a stepped hole structure, wherein the large diameter hole is a threaded hole, and the diameter of the small diameter hole corresponds to the outer diameter of the valve body 1. The connecting sleeve 6 is rotatably sleeved on the valve body 1 through its small diameter hole. The clamping ring structure 7 is located in the connecting sleeve 6 and abuts against the step surface of the stepped hole to form an axial limiting structure. Through the axial limiting structure, the connecting sleeve 6 can only move toward the outlet end of the valve body 1, but cannot move toward the inlet end of the valve body 1. The valve cap 4 is provided with an insertion blind hole corresponding to the inlet end of the valve body 1, and a sealing gasket 3 is provided at the bottom of the insertion blind hole. The inlet end of the valve body 1 is inserted into the insertion blind hole, and the sealing gasket 3 is clamped between the valve body 1 and the valve cap 4 and is squeezed and deformed to seal the valve cap 4 and the valve body 1, that is, the refrigeration equipment pipeline is sealed to prevent the refrigerant in the refrigeration equipment from leaking. The valve cap 4 is inserted into the connecting sleeve 6, and the valve cap 4 is provided with an external thread corresponding to the threaded hole of the connecting sleeve 6, and then is threadedly connected with the connecting sleeve 6.

[0024] In the utility model, a mounting groove is provided at the bottom of the blind hole, the bottom of the sealing gasket 3 is embedded and fixed in the mounting groove, and the top of the sealing gasket 3 is pressed against the top surface of the inlet end of the valve body 1 to form a sealing structure.

[0025] In the utility model, a slide groove 11 is provided in the vertical direction on the outer circumferential surface of the valve body 1 at its inlet end, and the slide groove 11 extends out of the end face of the inlet end. A key groove is provided on the wall of the blind hole of the valve cap 4, and a key 8 is provided in the key groove. The key 8 is a rectangular key, and the key 8 is slidably installed in the slide groove 11 and forms a sliding auxiliary structure with the slide groove 11. This structure enables the valve cap 4 to only move up and down, ensuring that the sealing gasket 3 only bears pressure, so that the sealing gasket 3 is evenly stressed and its sealing effect is improved; at the same time, the sliding auxiliary structure also facilitates the threaded connection operation of the connecting sleeve 6 and the valve cap 4.

[0026] For the convenience of operation, the outer circumference of the valve cap 4 is rolled with patterns; the outer circumference of the connecting sleeve 6 is rolled with patterns.

[0027] When inspecting the refrigeration equipment, loosen the connecting sleeve 6, remove the valve cap 4, connect the inlet of the valve body 1 to the refrigerant charging equipment pipeline, and the high-pressure refrigerant presses down the valve core 2 to open the valve core 2. Refrigerant is charged into the refrigeration equipment through this inspection valve. This technology is a common technical means used by maintenance personnel in this field and is not described in detail. After completion, the refrigerant charging equipment is removed, and the valve cap 4 is buckled onto the valve body 1 and connected through the connecting sleeve 6. The valve cap 4 presses the sealing gasket 3 tightly to seal the inspection valve.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A service valve for refrigeration equipment, comprising a valve body (1), a valve core (2), a valve cap (4) and a connecting pipe (5), wherein the connecting pipe (5) is installed at the outlet end of the valve body (1), and the valve core (2) is arranged in the valve body (1); characterized in that: The valve cap (4) is connected to the inlet end of the valve body (1) via a connecting sleeve (6); The valve body (1) is provided with a limiting structure at a position near its inlet end; the inner hole of the connecting sleeve (6) is a stepped hole structure, wherein the large-diameter hole is a threaded hole, and the diameter of the small-diameter hole corresponds to the outer diameter of the valve body (1); the connecting sleeve (6) is rotatably sleeved on the outside of the valve body (1), and the limiting structure abuts against the step surface of the stepped hole; the bottom surface of the valve cap (4) is provided with an insertion blind hole, and the inlet end of the valve body (1) is inserted into the insertion blind hole, and a sealing gasket (3) is provided between the end face of the inlet end of the valve body (1) and the bottom of the insertion blind hole; the valve cap (4) is inserted into the connecting sleeve (6) and is threadedly connected to the connecting sleeve (6).

2. The inspection valve for refrigeration equipment according to claim 1, characterized in that: The limiting structure is a clamping ring structure (7).

3. The inspection valve for refrigeration equipment according to claim 1, characterized in that: A mounting groove is provided at the bottom of the insertion blind hole, and the sealing gasket (3) is fixed in the mounting groove.

4. The inspection valve for refrigeration equipment according to claim 1, characterized in that: The outer circumferential surface at the inlet end of the valve body (1) is provided with a slide groove (11) in the vertical direction, and the wall of the blind hole of the valve cap is provided with a key groove, and a key (8) is provided in the key groove, and the key (8) is slidably installed in the slide groove (11).

5. The inspection valve for refrigeration equipment according to claim 1, characterized in that: The outer circumferential surface of the valve cap (4) is rolled with patterns; the outer circumferential surface of the connecting sleeve (6) is rolled with patterns.

6. The inspection valve for refrigeration equipment according to claim 1, characterized in that: The inlet of the valve body (1) is provided with an internal thread for connecting to a pipeline of a refrigerant charging device.

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