Detection valve

Abstract

The utility model provides a detection valve which comprises a valve body, a valve body, a mounting channel penetrating through the valve body, a containing groove formed in the valve body and a sealing wall, and the side, close to the containing groove, of the sealing wall is a frustum-shaped inclined face. The valve rod comprises a tail part accommodated in the mounting channel, an extension section penetrating through the sealing wall, an extension section extending out of the mounting channel and an annular clamping groove positioned in the extension section; the tail portion is matched with the inclined face and abuts against the inclined face to form sealing. The spring is sleeved on the extension section; the fixing clamp is fixedly mounted at one end in the mounting channel, and the extending section penetrates through the fixing clamp, so that the fixing clamp is sleeved with the annular clamping groove and is in interference fit with the annular clamping groove; the side, close to the extending section, of the extending end abuts against the fixing clamp, the two ends of the spring abut against the fixing clamp and the sealing wall respectively, and the spring is in a compressed state. And the sealing ring is mounted in the accommodating groove. Compared with the prior art, the detection valve is good in sealing effect and low in production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, in particular to a detection valve for leakage of an evaporator and a condenser used in refrigeration equipment. Background Art

[0002] In refrigeration equipment, such as air conditioners, evaporators and condensers are the core components. If leakage occurs, it will directly cause the equipment to work poorly. Therefore, a detection valve is required for detection.

[0003] The conventional detection valve includes an elastomer and a metal connecting rod inserted into the elastomer, and the sealing method is an elastomer seal. However, the sealing component of the conventional detection valve requires the metal connecting rod and the elastomer to be combined by a high-temperature vulcanization process, and the increase in the manufacturing process also increases the manufacturing cost.

[0004] Therefore, it is necessary to provide a new detection valve to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a detection valve with good sealing effect and low production cost.

[0006] In order to solve the above technical problems, the utility model provides a detection valve, comprising:

[0007] A valve body, the valve body comprising a valve body, a mounting channel penetrating the valve body, an annular receiving groove formed by the inner side of the valve body being recessed radially outward, and an annular sealing wall formed by the inner side of the valve body being protruded radially inward; the receiving groove is communicated with the mounting channel, and the sealing wall has a frustoconical inclined surface on one side close to the receiving groove;

[0008] A valve stem, the valve stem comprising a tail portion received in the installation channel, an extension section extending from the tail portion along the installation channel in a direction away from the receiving groove and passing through the sealing wall, a protruding section extending from the extension section to the outside of the installation channel, and an annular groove formed by an end of the extension section close to the protruding section being recessed inwardly along its radial direction; a side of the tail portion close to the sealing wall matches the inclined surface and abuts against the inclined surface to form a seal;

[0009] A spring, the spring is received in the installation channel and sleeved on the extension section;

[0010] A fixing card, the fixing card is annular and is installed and fixed at one end in the installation channel, the extension section passes through the fixing card, so that the fixing card sleeve is arranged in the annular card groove and forms an interference fit with the extension section; the side of the protruding end close to the extension section presses against the fixing card, and the two ends of the spring respectively abut against the fixing card and the sealing wall, and are in a compressed state; and

[0011] A sealing ring is installed in the receiving groove.

[0012] Preferably, the valve body further comprises an internal thread formed in the installation channel, and the internal thread extends from an end of the valve body away from the fixing card to the receiving groove.

[0013] Preferably, the valve stem is an integrally molded structure of engineering plastics.

[0014] Preferably, the valve body is an integrally molded structure of engineering plastics.

[0015] Compared with the prior art, the detection valve of the utility model forms a receiving groove and a sealing wall inside the valve body by designing the structure of the valve body, and the side of the sealing wall close to the receiving groove is a frustum-shaped inclined surface; the side of its tail close to the sealing wall matches the inclined surface and abuts against the inclined surface to form a seal; after the spring is sleeved on the valve stem, the valve stem is passed through a fixing card fixed to the end of the valve body, so that the valve stem and the fixing card have an interference fit and the protruding end of the valve stem away from the tail abuts against the fixing card, thereby realizing the fixed installation of the valve stem and the valve body under the action of the spring after compression, and the sealing effect is good. Not only is the structure simple and easy to assemble, but the valve stem and the valve body are both one-time molded structures made of engineering plastics, which saves the manufacturing cost of the high-temperature vulcanization process, thereby effectively reducing the overall production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is described in detail below in conjunction with the accompanying drawings. Through the detailed description made in conjunction with the following drawings, the above and other aspects of the utility model will become clearer and easier to understand.

[0017] In the figure:

[0018] Figure 1 This is a schematic diagram of the structure of the detection valve of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the decomposition structure. DETAILED DESCRIPTION

[0020] The specific implementation of the present utility model is described in detail below with reference to the accompanying drawings.

[0021] The specific implementation modes / examples described herein are specific implementation modes of the present utility model, which are used to illustrate the concept of the present utility model, are explanatory and exemplary, and should not be interpreted as limiting the implementation modes of the present utility model and the scope of the present utility model. In addition to the examples described herein, those skilled in the art can also adopt other obvious technical solutions based on the contents disclosed in the claims and the specification of this application, and these technical solutions include any obvious replacement and modification of the embodiments described herein, which are within the protection scope of the present utility model.

[0022] The following descriptions of the embodiments refer to the attached drawings to illustrate specific embodiments of the present invention. Directional terms mentioned in the present invention, such as up, down, front, back, left, right, inside, outside, side, etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, but are not used to limit the present invention.

[0023] Please refer to Figure 1-2 As shown, the utility model provides a detection valve 100, including: a valve body 1, a valve stem 2, a spring 3, a fixing card 4, and a sealing ring 5.

[0024] The valve body 1 includes a valve body 11, an installation channel 12 penetrating the valve body 11, an annular receiving groove 13 formed by the inner side of the valve body 11 being recessed radially outward, and an annular sealing wall 14 formed by the inner side of the valve body 11 being protruded radially inward.

[0025] The receiving groove 13 is communicated with the installation channel 12, and a frustum-shaped inclined surface 141 is provided on one side of the sealing wall 14 close to the receiving groove 13. In this embodiment, the valve body 1 is an integrally-molded structure made of engineering plastics by injection molding.

[0026] The valve stem 2 includes a tail portion 21 received in the installation channel 12, an extension section 22 extending from the tail portion 21 along the installation channel 12 in a direction away from the receiving groove 13 and passing through the sealing wall 14, a protruding section 23 extending from the extension section 22 to the outside of the installation channel 12, and an annular groove 24 formed by a radial inward depression of one end of the extension section 22 close to the protruding section 23. The side of the tail portion 212 close to the sealing wall 14 matches the inclined surface 141 and abuts against the inclined surface 141 to form a seal, so that the tail portion 21 is located at the sealing wall 14 when it moves upward. In this embodiment, the valve stem 2 is an engineering plastic integral injection molding structure, which has better structural stability and lower production cost than the metal and elastic material composite structure in the prior art.

[0027] The spring 3 is received in the installation channel 12 and sleeved on the extension section 22 .

[0028] The fixing card 4 is annular and is fixed at one end in the installation channel 12. The extension section 22 passes through the fixing card 4, so that the fixing card 4 is sleeved in the extension section 22 and located in the annular groove 24, and the fixing card 4 forms an interference fit with the extension section 22. The side of the protruding end 23 close to the extension section 22 presses against the fixing card 4, and the two ends of the spring 3 respectively abut against the fixing card 4 and the sealing wall 14. At this time, the spring 3 is in a compressed state. The elastic restoring tension of the spring 3 during compression makes the tail 21 and the protruding end 23 of the valve stem 2 respectively have a tendency to move toward each other, and are respectively limited by the sealing wall 14 and the fixing card 4, so that the valve stem 2 is installed and fixed in the valve body 1.

[0029] The sealing ring 5 is installed in the receiving groove 13. The end of the valve body away from the fixing card 4 is inserted and installed in the pipe mouth to be detected, so as to realize leakage detection.

[0030] In this embodiment, the valve body 1 further includes an internal thread 15 formed in the installation channel 12 , and the internal thread 15 extends from an end of the valve body 11 away from the fixing card 4 to the receiving groove 13 , so as to facilitate quick connection with the pipe opening to be tested.

[0031] When assembling the detection valve 100 of the utility model, the valve stem 2 is first inserted into the valve body 1, so that the tail 21 of the valve stem 2 abuts against the sealing wall 14 in the valve body 1; then the spring 3 is installed in the installation channel 12 and sleeved on the extension section 22 of the valve stem 2; then the fixing card 4 is installed at one end of the valve body 1 and fixed, so that the extension section 23 of the valve stem 2 passes through the fixing card 4 and presses to the side of the fixing card 4 away from the spring 3, so that the spring is in a compressed state and the two ends are respectively abutted against the fixing card 4 and the sealing wall 14, so that the valve stem 2 and the valve body 1 are installed and fixed; finally, the sealing ring 5 is installed in the receiving groove 13 to complete the assembly of the detection valve 100. The valve stem is a one-time molding structure made of engineering plastics, which omits the assembly of the high-temperature vulcanization process and effectively reduces the production cost.

[0032] Compared with the prior art, the detection valve of the utility model forms a receiving groove and a sealing wall inside the valve body by designing the structure of the valve body, and the side of the sealing wall close to the receiving groove is a frustum-shaped inclined surface; the side of its tail close to the sealing wall matches the inclined surface and abuts against the inclined surface to form a seal; after the spring is sleeved on the valve stem, the valve stem is passed through a fixing card fixed to the end of the valve body, so that the valve stem and the fixing card have an interference fit and the protruding end of the valve stem away from the tail abuts against the fixing card, thereby realizing the fixed installation of the valve stem and the valve body under the action of the spring after compression, and the sealing effect is good. Not only is the structure simple and easy to assemble, but the valve stem and the valve body are both one-time molded structures made of engineering plastics, which saves the manufacturing cost of the high-temperature vulcanization process, thereby effectively reducing the overall production cost.

[0033] 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 by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A detection valve, characterized in that: include: A valve body, the valve body comprising a valve body, a mounting channel penetrating the valve body, an annular receiving groove formed by the inner side of the valve body being recessed radially outward, and an annular sealing wall formed by the inner side of the valve body being protruded radially inward; the receiving groove is communicated with the mounting channel, and the sealing wall has a frustoconical inclined surface on one side close to the receiving groove; A valve stem, the valve stem comprising a tail portion received in the installation channel, an extension section extending from the tail portion along the installation channel in a direction away from the receiving groove and passing through the sealing wall, a protruding section extending from the extension section to the outside of the installation channel, and an annular groove formed by an end of the extension section close to the protruding section being recessed inwardly along its radial direction; a side of the tail portion close to the sealing wall matches the inclined surface and abuts against the inclined surface to form a seal; A spring, the spring is received in the installation channel and sleeved on the extension section; A fixing card, the fixing card is annular and is installed and fixed at one end in the installation channel, the extension section passes through the fixing card, so that the fixing card sleeve is arranged in the annular groove and forms an interference fit with the extension section; the side of the extension section close to the extension section presses against the fixing card, and the two ends of the spring respectively abut against the fixing card and the sealing wall, and are in a compressed state; and A sealing ring is installed in the receiving groove.

2. The detection valve according to claim 1, characterized in that: The valve body further includes an internal thread formed in the installation channel, and the internal thread extends from an end of the valve body away from the fixing card to the receiving groove.

3. The detection valve according to claim 1, characterized in that: The valve stem is an engineering plastic integrally molded structure.

4. The detection valve according to claim 1, characterized in that: The valve body is an engineering plastic integrally formed structure.

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