CN202835966U - Freezing medium filling tube dropping prevention connector - Google Patents

Abstract

The utility model relates to a refrigerant filling device, in particular to a refrigerant filling pipe joint. An anti-dropping joint of a refrigerant filling pipe, comprising a main body of the joint, in which a first step, a second step and a third step with increasing inner diameters are arranged in the joint main body; The inner wall of the third step is covered with a sealing ring, and the right port of the sealing ring extends outward to fit with the right end surface of the joint body; the inner circumference of the sealing ring is provided with a The convex part, the outer periphery of the thimble is provided with a concave part matching the convex part. As a preferred solution, the convex part is a convex ring, and the concave part is a concave ring matched with the convex ring. In the utility model, a convex ring is arranged on the inner circumference of the sealing ring, and a matching concave ring is provided on the outer circumference of the thimble which closely fits the inner circumference of the sealing ring. The right part of the concave ring of the thimble forms a pressing convex ring, which can tighten the sealing ring Press it tightly so that the sealing ring will not be washed out by the refrigerant.

Description

Refrigerant filling pipe anti-disconnection joint

technical field

The utility model relates to a refrigerant filling device, in particular to a refrigerant filling pipe joint.

Background technique

At present, commonly used refrigerant filling joints all use a joint with a thimble and a compression cap, and a movable sealing gasket is provided in the joint for sealing. When filling the refrigerant, the thimble pushes away the movable sealing core of the refrigerant filling port on the air conditioner, so that the refrigerant filling pipe is connected with the refrigerant pipeline of the air conditioner. In order to prevent refrigerant leakage, the joint of the refrigerant filling pipe A sealing gasket is built in to seal. When the operation of filling and filling is completed, a small amount of high-pressure refrigerant will rush out, which will easily cause the movable sealing ring to fall off, and it is almost impossible to retrieve it when working at heights, which will seriously affect the safety and security of installation and maintenance. schedule.

Utility model content

The technical problem to be solved by the utility model is to provide a refrigerant filling pipe joint whose sealing ring does not fall off.

The technical scheme that the utility model solves above-mentioned technical problem is:

An anti-dropping joint for refrigerant filling pipes, including a joint main body, a compression cover is set on the outer wall of the second half of the joint main body, and a three-step through hole is arranged in the joint main body, from the refrigerant outlet on the left side of the joint main body to the right side The refrigerant inlets are respectively the first step, the second step and the third step with increasing inner diameters; the inner wall of the second step is covered with a hollow thimble longer than the length of the second step, and the main body of the joint and the thimble form an integral liquid hole; the inner wall of the third step is covered with a sealing ring, and the gap between the inner wall of the third step and the outer wall of the thimble longer than the second step is an interference fit with the sealing ring, and the right port of the sealing ring extends outwards and The right end surface of the joint body is attached; the inner circumference of the sealing ring is provided with a convex part on the part that is attached to the outer circumference of the thimble, and the outer circumference of the thimble is provided with a concave part matching the convex part.

As a preferred solution, the convex part is a convex ring, and the concave part is a concave ring matched with the convex ring.

The utility model has the following beneficial effects:

1. In the utility model, a convex ring is arranged on the inner circumference of the sealing ring, and a matching concave ring is provided on the outer circumference of the thimble that closely fits the inner circumference of the sealing ring. The right part of the concave ring of the thimble forms a pressing convex ring, which can seal The ring is tightly pressed, so the sealing ring will not be washed out by the refrigerant.

2. The appearance of the utility model and the inner wall of the liquid passing pipe are exactly the same as the widely used filling joints at present, and can completely replace the existing joints.

3. The structure of the double-convex ring of the utility model is simple and easy to process, and the manufacturing cost of the joint will not be increased, the connection is firm, and the use is convenient.

Description of drawings

Fig. 1 is the sectional view of assembly of the utility model.

Fig. 2 is an exploded view of the assembly structure of the thimble and the sealing ring in Fig. 1 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

As shown in Figure 1, a refrigerant filling pipe anti-disengagement joint includes a joint body 1, the outer wall of the second half of the joint body 1 is covered with a compression cover 3, and a three-step through hole is provided in the joint body 1, and the joint body 1 The refrigerant outlet on the left side and the refrigerant inlet on the right side of the interface body 1 are respectively the first step 11, the second step 12 and the third step 13 with increasing inner diameters; A hollow thimble 2 with a length of two steps, the joint body 1 and the thimble 2 form an integrated liquid hole; the inner wall of the third step 13 is covered with a sealing ring 4, and the inner wall of the third step 13 is longer than the second step 12. The thimble 2 The gap between the outer walls of the seal ring 4 is an interference fit, and the right port of the seal ring 4 extends outward to fit the right end surface of the joint body 1 . A protruding ring 41 is provided on the inner periphery of the sealing ring 4 at the part that fits the outer periphery of the thimble 2 , and a concave ring 21 matching the protruding ring 41 is provided on the outer wall of the thimble 2 .

During the assembly process of the joint of the utility model, the thimble 2 is first screwed in place, and then the convex ring 41 of the sealing ring 4 is pressed into the concave ring 21 of the thimble 2 by the elasticity of the rubber sealing ring 4 itself, so that the concave ring 21 is right Part of the thimble on the side will form a pressing convex ring 22 to tightly press the convex ring 41 of the sealing ring 4, thereby ensuring that the sealing ring 4 will not fall off during use.

When filling the refrigerant, unscrew the sealing cap of the needle valve of the refrigerant filling port of the air conditioner, align the refrigerant filling joint with the refrigerant filling port of the air conditioner and screw it tightly. The angle valve on the refrigerant storage tank makes the refrigerant flush out a little and removes the air in the pipe. Then, fully tighten the filling joint to ensure that the sealing ring in the joint is pressed against the valve body of the refrigerant filling needle valve of the air conditioner to play a sealing role. Note that it must be ensured that the thimble in the filling head can push open the needle valve in the filling port of the air conditioner, so that the refrigeration system of the air conditioner is integrated with the filling joint, refrigerant delivery pipe and refrigerant storage tank, and the refrigerant is fully opened. With the angle valve on the storage tank, the refrigerant can enter the joint from the refrigerant storage tank through the refrigerant delivery pipe, and finally enter the air conditioner.

After the filling is completed, first close the angle valve on the refrigerant storage tank, and then unscrew the refrigerant filling head. During the unscrewing process, the needle valve of the refrigerant filling port of the air conditioner is not completely closed, and some refrigerant will rush out, because the pressing convex ring 22 of the thimble 2 presses the convex ring 41 of the sealing ring 4 tightly, thus sealing Ring 4 will not be washed off by refrigerant.

The above-mentioned embodiments only express the implementation manner of the present utility model, and its description is comparatively specific and detailed, but can not therefore be interpreted as the restriction to the patent scope of the present utility model, as long as adopt the form of equal replacement or equivalent transformation to obtain All technical solutions should fall within the protection scope of the present utility model.

Claims (2)

1. An anti-disengagement joint of a refrigerant filling pipe, comprising a joint main body (1), the outer wall of the right half of the joint main body (1) close to the refrigerant inlet is covered with a compression cover (3), and the joint main body (1) is equipped with a There are three-step through holes, the first step (11), the second step (12) and the third step ( 13); the inner wall of the second step is covered with a hollow thimble (2) longer than the length of the second step, and the joint body (1) and the thimble (2) form an integral liquid hole; the third step (13) The inner wall is covered with a sealing ring (4), and the gap between the inner wall of the third step (13) and the outer wall of the thimble (2) is an interference fit with the sealing ring (4), and the right port of the sealing ring (4) It extends outwards and fits the right end surface of the joint body (1); it is characterized in that: The inner circumference of the sealing ring (4) is provided with a convex part on the part that fits the outer circumference of the thimble (2), and the outer circumference of the thimble (2) is provided with a concave part matching the convex part. 2. The refrigerant filling pipe detachment prevention joint according to claim 1, characterized in that: the convex part is a convex ring (41), and the concave part is a concave ring (21) matching the convex ring (41) .

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