CN208503689U

CN208503689U - Tamper-resistant union nut and its component and corresponding air conditioner

Info

Publication number: CN208503689U
Application number: CN201820545359.0U
Authority: CN
Inventors: 汪志勇
Original assignee: Shanghai Mitsubishi Electric and Shangling Air Conditioner and Electric Appliance Co Ltd
Current assignee: Shanghai Mitsubishi Electric and Shangling Air Conditioner and Electric Appliance Co Ltd
Priority date: 2018-04-17
Filing date: 2018-04-17
Publication date: 2019-02-15
Anticipated expiration: 2028-04-17

Abstract

The utility model discloses a kind of tamper-resistant union nuts, connect with pipe joint, and union nut is formed by inside and outside two layers, the inner shaft including being coupled by specific structure or technique and housing；Apply screw-down torque to housing, housing drives inner shaft synchronous rotary so that inner shaft is gradually engaged pipe joint until most deep and be engaged torque and reach a certain amount of, at this time, continue to apply to housing and tightens or unscrew torque, the torque that housing applies inner shaft is engaged torque much smaller than pipe fitting and inner shaft, sliding occurs between housing and inner shaft so that tightening or unscrewing torque can not continue to transmit to inner shaft, to achieve the effect that Anti-dismantling.Its advantage is that: the adapter tube connection of Anti-dismantling may be implemented, caused secondary refrigerant leakage problem after effectively avoiding existing pipe fitting from being disassembled after connect with union nut is simple structure and convenient processing, sealed reliable, easy to install, at low cost.

Description

Tamper-resistant union nut and its component and corresponding air conditioner

Technical field

The utility model relates to pipe connecting structure technical fields, and in particular to a kind of tamper-resistant union nut and its group Part and corresponding air conditioner.

Background technique

The split air conditioner indoor of common working medium (such as R22 and R410A) all uses pipe fitting and union nut at present Mode connect evaporator and connecting tube.

It according to the rules, is not allow to use on the inside of the air conditioner chamber for using combustible refrigerant (such as R290 and R32) Detachable connector.However existing union nut is usually integral type union nut, there are dismountable possibilities, cannot Meeting installation requirements on the inside of the air conditioner chamber using combustible refrigerant, i.e. connection between pipe joint and union nut loosens, It will lead to secondary refrigerant leakage, be not able to satisfy the requirement of assembly standard and safety.It is certainly, existing that there is also some Anti-dismantlings adapter tubes Nut, but because its structure is complicated, cause its processing and use all inconvenient, cost is also relatively high.

For these reasons, need to propose a kind of simple tamper-resistant of the structure for meeting assembly standard and security requirement Union nut is actually necessary.

Utility model content

The purpose of this utility model is to provide a kind of tamper-resistant union nut and its component and corresponding air conditioner, The adapter tube connection of Anti-dismantling may be implemented, it is caused cold after effectively avoiding existing pipe fitting from being disassembled after connecting with union nut Matchmaker's leakage problem, it is simple structure and convenient processing, sealed reliable, easy to install, it is at low cost.

In order to achieve the above object, the utility model is achieved through the following technical solutions:

A kind of tamper-resistant union nut, connect with pipe joint, it is characterized in that:

Union nut is formed by inside and outside two layers, the inner shaft including being coupled by specific structure or technique and housing；

Apply screw-down torque to housing, housing drives inner shaft synchronous rotary so that inner shaft is gradually engaged pipe joint until most Deep, at this point, continuing to apply a greater amount of screw-down torques to housing, housing is much smaller than pipe fitting and inner shaft to the torque that inner shaft applies Occlusion torque, between housing and inner shaft occur sliding so that torque can not continue to inner shaft transmit.

Above-mentioned tamper-resistant union nut, in which:

Inner shaft is cylindrical layer structure in one, and housing is an outer-hexagonal layer structure.

Above-mentioned tamper-resistant union nut, wherein special process connection refers to:

Inner shaft and housing are all made of metal material, and the two is carried out nested by ultrasonic welding process.

Inner shaft is made of brass, and housing is made of plastics, and the two is carried out nested by in-mold forming process.

Inner shaft is nested with housing progress by way of indentation.

Above-mentioned tamper-resistant union nut, wherein specific structure connection refers to:

The external cylindrical surface of inner shaft has that partial threads are connect with housing or the inner cylinder face of housing has partial threads and inner shaft Connection.

A kind of tamper-resistant tube joint assembly, characterized in that include:

Pipe fitting and the union nut.

Above-mentioned tamper-resistant tube joint assembly, in which:

The inner shaft of pipe fitting and union nut is connected through a screw thread.

A kind of air conditioner, it is characterized in that:

It is connected between the indoor unit connecting tube and outdoor unit connecting tube of air conditioner by the tube joint assembly.

Compared with the prior art, the utility model has the following advantages: the adapter tube connection of Anti-dismantling may be implemented, effectively keep away Exempt to be disassembled rear caused secondary refrigerant leakage problem after existing pipe fitting is connected with union nut, simple structure and convenient processing, It is sealed reliable, easy to install, it is at low cost.

Detailed description of the invention

Fig. 1 is the assembly structure diagram of the tamper-resistant tube joint assembly of the embodiments of the present invention one；

Fig. 2 is the cross-sectional view of the tamper-resistant tube joint assembly of the embodiments of the present invention one；

Fig. 3 is the assembly structure diagram of the tamper-resistant tube joint assembly of the embodiments of the present invention two；

Fig. 4 is the cross-sectional view of the tamper-resistant tube joint assembly of the embodiments of the present invention two.

Specific embodiment

The utility model is done and is further explained by the way that a preferable specific embodiment is described in detail below in conjunction with attached drawing It states.

The utility model proposes

A kind of tamper-resistant union nut, connect with pipe joint 3, and union nut is formed by inside and outside two layers, including passes through spy Determine the inner shaft 1 and housing 2 that structure or technique are coupled；To housing 2 apply screw-down torque, housing 2 drive 1 synchronous rotary of inner shaft so that It obtains inner shaft 1 and is gradually engaged pipe joint 3 until most deep occlusion torque reaches a certain amount of, at this point, continuing to tighten or twist to the application of housing 2 Loose torque, housing 2 are much smaller than the torque that is engaged of pipe fitting 3 and inner shaft to the torque that inner shaft 1 applies, send out between housing 2 and inner shaft 1 Raw sliding (sliding friction), which to tighten or unscrew torque, can not continue to transmit to inner shaft 1, to achieve the effect that Anti-dismantling.

As shown in Figure 1, 2, it is the first embodiment of the utility model, uses special process to be coupled, specifically, interior Axis 1 is cylindrical layer structure in one, and housing 2 is an outer-hexagonal layer structure so that tool carries out screwing application torque.It can be using interior Axis 1 and housing 2 are all made of metal material, the two ultrasonic welding process carry out it is nested by way of, alternatively, inner shaft 1 by Brass is made, and housing 2 is made of plastics, and it is logical to be also possible to inner shaft 1 in such a way that in-mold forming process carries out nesting for the two Cross indentation mode carried out with housing 2 it is nested, in above-mentioned bind mode, between inner shaft 1 and housing 2 Tightening moment range by two companies Length and the technique of section are connect to control, those skilled in the art, which can according to need, to be designed.

As shown in Figure 3,4, it is the second embodiment of the utility model, uses specific structure to be coupled, specifically, interior Have on the external cylindrical surface of axis 1 partial threads connect with housing 2 or the inner cylinder face of housing 2 on there is partial threads and inner shaft 1 to connect It connects, at this point, Tightening moment range is connected through a screw thread the length of section between inner shaft 1 and housing 2 and the screw pitch of screw thread controls, this Field technical staff, which can according to need, to be designed；In the present embodiment, housing 2 can equally use outer-hexagonal layer structure, and And preferably, close to one end of pipe fitting 3, setting step is limited with the tightening direction to housing 2 in inner shaft 1.

As shown in Figure 2,4, above-mentioned this tamper-resistant union nut is applied in a tube joint assembly, union nut It is usually attached by screw thread with pipe fitting 3, this kind of tube joint assembly can be used to connection air conditioner room unit connecting tube With outdoor unit connecting tube, while to ensure to be fitted close between union nut and pipe fitting, the effect of Anti-dismantling is played, is prevented Secondary refrigerant leakage.It should be noted that assembly before, the inner shaft 1 and housing 2 of union nut require first to be coupled, then again with Pipe fitting 3 is cooperatively connected.Whether the structure type of the first embodiment or the second embodiment is used in general, being designed in inner shaft 1 The internal screw thread being engaged with the external screw thread of pipe joint 3.

The working principle of the utility model is to apply screw-down torque to housing 2, housing 2 drives 1 synchronous rotary of inner shaft, makes Pipe fitting 3 by union nut precession, after union nut and the cooperation of 3 perfect thread of pipe fitting, at this point, continuing further to connecing Pipe nut applies tightening torque, can be because the position of inner shaft 1 and pipe joint 3 reaches capacity relatively and to tighten or unscrew What torque was not achieved inner shaft 1 and pipe joint 3 is engaged torque, at this point, the housing 2 in one structure of embodiment is detached from inner shaft 1, The threaded connection section sliding teeth between housing 2 and inner shaft 1 in two structure of embodiment is detached from housing 2 with inner shaft 1 in turn, most The torque being applied on housing 2 eventually, which can not continue to be passed to cause to tighten or unscrew torque in inner shaft 1, not to be added, i.e., can not continue It is fastened or is loosened between butt tube nut and pipe fitting 3, dismantled again by screwing tool so that inner shaft 1 is inconvenient, thus really The tight fit between union nut and pipe fitting 3 has been protected, the effect of Anti-dismantling is played.

It is discussed in detail although the content of the utility model has passed through above preferred embodiment, but it should be appreciated that on The description stated is not considered as limitations of the present invention.After those skilled in the art have read above content, for A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the protection scope of the utility model should be by appended Claim limit.

Claims

1. a kind of tamper-resistant union nut is connect with pipe joint (3), it is characterised in that:

Union nut is formed by inside and outside two layers, the inner shaft (1) including being coupled by specific structure or technique and housing (2)；

Apply screw-down torque to housing (2), housing (2) drives inner shaft (1) synchronous rotary so that inner shaft (1) is gradually engaged adapter tube Torque, housing are tightened or unscrewed to head (3) at this point, continuing to apply to housing (2) until most deep and be engaged torque and reach a certain amount of (2) it is much smaller than the torque that is engaged of pipe fitting 3 and inner shaft to the torque that inner shaft (1) applies, occurs between housing (2) and inner shaft (1) Sliding is so that tightening or unscrewing torque can not continue to transmit to inner shaft (1), to achieve the effect that Anti-dismantling.

2. tamper-resistant union nut as described in claim 1, it is characterised in that:

Inner shaft (1) is cylindrical layer structure in one, and housing (2) is an outer-hexagonal layer structure.

3. tamper-resistant union nut as claimed in claim 2, which is characterized in that special process connection refers to:

Inner shaft (1) is all made of metal material with housing (2), and the two is carried out nested by ultrasonic welding process.

4. tamper-resistant union nut as claimed in claim 2, which is characterized in that special process connection refers to:

Inner shaft (1) is made of brass, and housing (2) is made of plastics, and the two is carried out nested by in-mold forming process.

5. tamper-resistant union nut as claimed in claim 2, which is characterized in that special process connection refers to:

Inner shaft (1) is nested with housing (2) progress by way of indentation.

6. tamper-resistant union nut as described in claim 1, which is characterized in that specific structure connection refers to:

The external cylindrical surface of inner shaft (1) has that partial threads are connect with housing (2) or the inner cylinder face of housing (2) has partial threads It is connect with inner shaft (1).

7. a kind of tamper-resistant tube joint assembly, characterized by comprising:

Pipe fitting (3), and the union nut as described in any one of claim 1 to 6.

8. tamper-resistant tube joint assembly as claimed in claim 7, it is characterised in that:

Pipe fitting (3) and the inner shaft (1) of union nut are connected through a screw thread.

9. a kind of air conditioner, it is characterised in that:

Connected between the indoor unit connecting tube and outdoor unit connecting tube of air conditioner by tube joint assembly as claimed in claim 7 It connects.