CN206280623U - A kind of Valve joint, air-conditioning system - Google Patents

Abstract

The utility model belongs to the technical field of valve joints, and discloses a valve joint and an air-conditioning system. The valve joint comprises: a sealing pipe, a connecting piece, a thimble and a sealing block. The first end of the sealing pipe is connected to the valve interface through the connecting piece, and the thimble is installed In the first end of the sealing tube, the sealing tube is provided with a limit module to limit the depth of the thimble penetrating into the first end of the sealing tube; the connection between the end face and the inner wall of the first end of the sealing tube is the end of the tapered surface and the valve interface matching; the sealing block is located in the first end of the sealing tube, and the sealing block is an elastic structure; a channel is provided in the thimble to communicate with the second end of the sealing tube and the other end of the thimble. The sealing ring is compressed by the end surface of the valve interface to form a soft seal, and the conical surface forms a hard seal with the end surface of the valve interface, and at the same time realizes the limit to avoid the failure of the gasket; the setting of double sealing and limit functions improves the sealing ability and The sealing can last for a long time, even if it is connected for a long time, it can meet the sealing requirements and ensure safety.

Description

A valve joint, air conditioning system

technical field

The utility model relates to the technical field of valve joints, in particular to a valve joint and an air conditioning system.

Background technique

Globe valves are widely used in the air conditioning industry. In order to facilitate inspection and maintenance, common globe valves are provided with a fluorine injection port to facilitate later inspection and maintenance work. For example, the stop valve whose application number is CN201510174296.3 has a fluorine injection port.

When the air conditioner is overhauled, it is generally connected to the pressure gauge with a hose with copper joints at both ends. This kind of copper joint is generally only softly sealed by a rubber sealing ring, and the effect is relatively poor; in addition, this kind of joint does not have a limit device. When the joint is tightened too tightly, the sealing ring will be deformed too much, and the seal will fail. risks of.

In addition, since it is connected by a hose, it cannot provide effective support. In some occasions that require a long time to connect, it is necessary to provide additional support and protection for the hose.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is: in order to solve the problem that the existing joints connected to the valve interface only have soft seals, the sealing effect is poor, there is no limit structure, the sealing ring is easy to fail, and there are potential safety hazards.

(2) Technical solution

In order to solve the above technical problems, the utility model provides a valve joint, including: a sealing tube, a connecting piece, a thimble and a sealing block, the first end of the sealing tube is connected to the valve interface to be connected through the connecting piece , the thimble is installed in the first end of the sealing tube, the sealing tube is provided with a limit module, and the limit module is used to limit the depth of the thimble penetrating into the first end of the seal tube;

The connection between the end surface of the first end of the sealing tube and the inner wall is a tapered surface, and the tapered surface matches the end of the valve interface;

The sealing block is located in the first end of the sealing tube and distributed around the thimble, the sealing block is an elastic structure; the thimble is provided with a channel to communicate with the second end of the sealing tube and the space at the other end of the thimble .

Wherein, the limiting module is a first stepped surface formed on the inner wall of the sealing tube.

Wherein, the outer wall of the sealing member is provided with a second stepped surface, and the connecting member is clamped on the second stepped surface.

Wherein, the connecting piece is a nut, and the nut is sleeved on the outside of the sealing tube, and one end of the nut is clamped at the second stepped surface, and the second end of the nut is connected to the inner thread through the inner thread. The above valve structure connection.

Wherein, the thimble has a zigzag structure, and the thimble is provided with an extension extending radially of the sealing tube, and the extension abuts against the limiting module.

Wherein, the sealing block is cylindrical.

Wherein, the material of the sealing tube and the connecting piece is copper.

Wherein, the second end of the sealing tube is sealed and connected with a connecting pipe.

Wherein, the connecting pipe is a copper pipe, and the connecting pipe and the sealing pipe are connected by brazing.

The utility model also discloses an air-conditioning system, the refrigerant pipeline of the air-conditioning system is provided with a valve, and the valve is connected with the above-mentioned valve joint.

(3) Beneficial effects

The above technical solution has the following advantages: the utility model relates to a valve joint and an air-conditioning system. After the valve joint is connected with the valve interface, the sealing ring forms a soft seal with the end surface of the valve interface, and the tapered surface at the first end of the sealing pipe is in contact with the valve interface. The end face of the interface forms a hard seal and realizes the limit at the same time, avoiding the excessive compression of the gasket and causing the seal cover to fail, ensuring the effectiveness of the soft seal; the setting of double seal and limit function improves the sealing ability and sealing reliability of the entire valve joint. Lasting time, even long-term connection can meet the sealing requirements and ensure safety. After the second end of the sealing tube is connected to the copper pipe, it can be easily welded to the copper pipe in the system to ensure the tightness of the connection without providing additional support.

Description of drawings

Fig. 1 is a schematic structural view of the valve joint described in Embodiment 1 of the present utility model;

Fig. 2 is a schematic diagram of the use state of the valve joint according to the first embodiment of the present invention.

Among them, 1. Nut; 2. Sealing tube; 2a, Tapered surface; 2b, First stepped surface; 2c, Second stepped surface; 3, Sealing block; 4, Thimble; 5, Connector; 6, Valve interface; 6a , the end face of the valve interface; 6b, the valve core.

detailed description

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

In the description of the present utility model, it should be noted that, unless otherwise stated, the scope of "above" includes the original number, and the meaning of "plurality" is more than two; the terms "upper", "lower", "left", The orientation or positional relationship indicated by "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationship shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a It can be detachably connected or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Embodiment one:

As shown in Figures 1 and 2, the utility model provides a valve joint, including: a sealing tube 2, a connecting piece, a thimble 4 and a sealing block 3, the first end of the sealing tube 2 is connected to the The connected valve interface 6 is connected, the thimble 4 is installed in the first end of the sealing tube 2, the sealing tube 2 is provided with a limit module, and the limit module is used to limit the thimble 4 from penetrating into the seal The depth of the first end of the pipe 2; the first end of the sealing pipe 2 is connected to the valve interface 6 to be connected, and after the connection, the thimble 4 can push the valve core 6b of the valve to realize the communication between the valve and the sealing pipe 2, that is, through The sealing tube 2 can lead out the medium in the valve pipeline for detection and other operations. The limit module limits the position of the thimble 4, so that the thimble 4 can just push the valve core 6b away after the connector is connected to realize communication.

The connection between the end surface of the first end of the sealing tube 2 and the inner wall is a conical surface 2a, and the conical surface 2a matches the end of the valve interface 6;

The sealing block 3 is located in the first end of the sealing tube 2, and distributed around the thimble 4, the sealing block 3 is an elastic structure; the thimble 4 is provided with a channel to communicate with the second end of the sealing tube 2 Space with the other end of the thimble 4; for example: the side wall of the thimble 4 communicates with the end of the thimble 4 towards the second end of the sealing tube 2, so that the valve interface 6 communicates with the second end of the sealing tube 2 .

As shown in Figure 2, the valve interface end face 6a is a conical surface, and the conical surface 2a on the sealing tube 2 has the same inclination as the valve interface end face 6a. A ring of hard seals can be formed between them to enhance the sealing ability; at the same time, an axial limit can be formed on the valve interface 6 to limit the depth of the end surface 6a of the valve interface extending into the first end of the sealing tube 2, so as to prevent the end surface 6a of the valve interface from being inserted too deep to cause sealing Excessive deformation of the block 3 leads to failure of the sealing block 3, ensuring the sealing quality of the soft seal at the sealing block 3. After the valve interface 6 is connected to the first end of the sealing tube 2, the end surface 6a of the valve interface meets the sealing block 3 and compresses the sealing block 3 to form a soft seal; the inner diameter of the valve interface 6 is larger than the width of the thimble 4 extending into it, and the valve core After 6b is lifted by the thimble 4, the medium in the valve pipeline enters the first end and the second end of the sealing tube 2 through the valve interface 6 and the thimble 4, so as to achieve the purpose of leading out the medium and facilitate inspection and maintenance.

In this solution, the sealing ring can form a soft seal after being compressed by the valve interface end surface 6a, and the tapered surface 2a at the first end of the sealing tube 2 can form a hard seal with the valve interface end surface 6a, and at the same time realize the position limit and avoid the gasket being overwhelmed. Compression causes the sealing cover to fail, ensuring the effectiveness of the soft seal; the setting of double sealing and limit function improves the sealing ability of the entire valve joint and the sustainable time of sealing. Even long-term connection can meet the sealing requirements and ensure safety.

Specifically, the limiting module is a first stepped surface 2b formed on the inner wall of the sealing tube 2 . That is, the entire sealing tube 2 is a variable diameter tube, the inner diameter of the first end of the sealing tube 2 is larger than the inner diameter of the second end, and the place where the inner diameter changes is the first stepped surface 2b. One end of the thimble 4 abuts against the first stepped surface 2b. After the thimble 4 abuts against the valve core 6b, it can form an axial limit on the thimble 4, so as to ensure that the valve core 6b can be pushed away, and ensure that the sealing tube 2 can be smoothly connected to the Valve connected. Of course, the step surface is only a preferred solution, and other solutions such as setting protrusions on the inner wall of the sealing tube 2 can also play a position-limiting function, that is, as long as a position-limiting module is set in the first end of the sealing tube 2 to realize the positioning The thimble 4 position-limiting schemes all belong to the protection scope of the present utility model.

Further, a second stepped surface 2c is provided on the outer wall of the sealing element, and the connecting element is clamped on the second stepped surface 2c. The outer diameter of the first end of the sealing tube 2 is larger than the outer diameter of the second end, and the sudden change in the outer diameter is the second stepped surface 2c.

Specifically, the connecting piece is a nut 1, and the nut 1 is sleeved on the outside of the sealing tube 2, and one end of the nut 1 is clamped at the second stepped surface 2c, and the first end of the nut 1 The two ends are connected with the valve structure through internal threads. The inner diameter of one end of the nut 1 is small to ensure that it can be stuck at the second stepped surface 2c, and the inner diameter of the other end of the nut 1 is larger to accommodate the first end of the sealing tube 2 and is connected to the valve interface 6 through an internal thread, so as to realize the sealing of the sealing tube 2 The purpose of communicating with the first end of the valve port 6. The outer surface of the nut 1 can be hexagonal or circular knurled, which can be designed according to usage requirements.

Specifically, the thimble 4 has a zigzag structure, and the thimble 4 is provided with an extension extending along the radial direction of the sealing tube 2, and the extension abuts against the limiting module. The side wall of the zigzag structure communicates with the end facing the second end of the sealing tube 2, so that the space in the valve can be smoothly communicated with the second end of the sealing tube 2 after the valve core 6b is opened to facilitate the passage of the medium.

Preferably, the sealing block 3 is cylindrical. The sealing block 3 is made of elastic material, and can form a soft seal with the valve interface end face 6a after compression to prevent medium leakage. The cylindrical structure itself can form a circumferential seal, and the sealing effect is better after compression.

Preferably, the sealing tube 2 and the connecting piece are made of copper. Copper is an inert material and safe to use.

Further, the second end of the sealed tube 2 is connected with a connecting pipe 5 in a sealed manner. The connecting pipe 5 is a copper pipe, and the connecting pipe 5 and the sealing pipe 2 are connected by brazing. The connecting pipe 5 is a copper pipe, which is convenient for welding connection with the copper pipe in the system; the connecting pipe 5 itself has a certain strength, and no additional support is required for long-term connection. The connecting pipe 5 can be set into an L shape to facilitate installation and disassembly.

Embodiment two:

The utility model also discloses an air-conditioning system, the refrigerant pipeline of the air-conditioning system is provided with a valve, and the valve is connected with the valve joint as described in the first embodiment. For example, for a shut-off valve with a fluorine-filled port, after the thimble 4 contacts the valve core 6b of the shut-off valve, the cut-off in the shut-off valve can be exported for detection or maintenance. After the valve joint is communicated with the valve interface 6 in the air conditioning system, the sealing ring forms a soft seal with the valve interface end face 6a, and the tapered surface 2a at the first end of the sealing pipe 2 forms a hard seal with the valve interface end face 6a, simultaneously realizing the limit position, to avoid the excessive compression of the gasket and cause the seal cover to fail, and to ensure the effectiveness of the soft seal; the setting of double seal and limit function improves the sealing ability of the entire valve joint and the sustainable time of the seal, even if it is connected for a long time. Meet sealing requirements and ensure safety. After the second end of the sealing pipe 2 is connected to the copper connecting pipe 5, it can be conveniently welded to the copper pipe in the system to ensure the tightness of the connection without providing additional support.

The above is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and replacements can also be made. And replacement should also be regarded as the protection scope of the present utility model.

Claims (10)

1. A valve joint, characterized in that it includes: a sealing tube, a connecting piece, a thimble and a sealing block, the first end of the sealing tube is connected to the valve interface to be connected through the connecting piece, and the thimble is installed In the first end of the sealing tube, the sealing tube is provided with a limiting module, and the limiting module is used to limit the depth of the thimble penetrating into the first end of the sealing tube; The connection between the end surface of the first end of the sealing tube and the inner wall is a tapered surface, and the tapered surface matches the end of the valve interface; The sealing block is located in the first end of the sealing tube and distributed around the thimble, the sealing block is an elastic structure; the thimble is provided with a channel to communicate with the second end of the sealing tube and the space at the other end of the thimble . 2. The valve joint according to claim 1, wherein the limiting module is a first stepped surface formed on the inner wall of the sealing tube. 3 . The valve joint according to claim 2 , wherein a second stepped surface is provided on the outer wall of the sealing member, and the connecting member is clamped on the second stepped surface. 4 . 4. The valve joint according to claim 3, wherein the connecting piece is a nut, the nut is sleeved on the outside of the sealing tube, and one end of the nut is clamped on the second stepped surface , the second end of the nut is connected to the valve structure through an internal thread. 5. The valve joint according to claim 1, characterized in that, the thimble is a zigzag structure, the thimble is provided with an extension extending along the radial direction of the sealing tube, and the extension abuts against the limit module. 6. The valve joint according to claim 1, wherein the sealing block is cylindrical. 7. The valve joint according to claim 1, wherein the material of the sealing tube and the connecting piece is copper. 8. The valve joint according to claim 1, wherein the second end of the sealing tube is sealingly connected with a connecting pipe. 9. The valve joint according to claim 8, wherein the connecting pipe is a copper pipe, and the connecting pipe and the sealing pipe are connected by brazing. 10. An air-conditioning system, characterized in that a valve is provided on the refrigerant pipeline of the air-conditioning system, and the valve is connected with the valve joint according to any one of claims 1-9.