CN207470950U - Anti-dismantling pipe connection device and air conditioner - Google Patents
Anti-dismantling pipe connection device and air conditioner Download PDFInfo
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- CN207470950U CN207470950U CN201721617381.3U CN201721617381U CN207470950U CN 207470950 U CN207470950 U CN 207470950U CN 201721617381 U CN201721617381 U CN 201721617381U CN 207470950 U CN207470950 U CN 207470950U
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Abstract
The utility model provides a kind of Anti-dismantling pipe connection device and air conditioner.Anti-dismantling pipe connection device includes：Pipe fitting and union nut, union nut include for be connected with pipe fitting first connecting portion, for connect there is bell-mouthed first second connecting portion taken over, for the twisting portion that screws of confession tool and be connected between second connecting portion and twisting portion and twist into two parts portion, can the portion of twisting into two parts can after pipe fitting and union nut locking forced breakage, the outer surface of first connecting portion and second connecting portion is cylindrical surface.Above-mentioned technical proposal, continue twisting twisting portion after union nut and pipe joint locking, make can the portion of twisting into two parts can not bear it is larger screw torque and be broken, realize second connecting portion and twisting part from, ensure the non-dismountable property of pipe fitting and union nut, avoid because accidentally dismounting leads to coolant leakage；Can the portion of twisting into two parts be located on union nut, make to twist into two parts welding position of the position far from pipe fitting and between taking over, to the influence of welding position when avoiding twisting into two parts.
Description
Technical field
The utility model is related to air-conditioning technical fields, more specifically, are related to a kind of Anti-dismantling pipe connection device and a kind of sky
Adjust device.
Background technology
At present, indoor unit is connected by split air conditioner generally use pipe fitting with union nut with the pipeline of outdoor unit
It connects.Existing pipe fitting and union nut are mainly made of thread segment and prism section two parts, and prism section has force application plane, are led to
It crosses and clockwise moment is applied to the prism section of pipe fitting and union nut, rotate together with thread segment and be fitted close to form sealing
Face allows refrigerant to circulate so as to which indoor unit be connected with the pipeline of outdoor unit.But by applying counterclockwise force to prism section
Square equally can be such that thread segment rotates counterclockwise together, so as to which the cooperation of pipe fitting and union nut be unclamped, i.e., pipe fitting with
There is dismounting between union nut.
But for using the air conditioner of flammable refrigerant, in order to avoid because coolant leakage being caused to cause peace during accidentally dismounting
Full accident, correlation standard indoor do not allow to use detachable connector.Therefore, it is existing in order to meet pipe connection device requirement
The evaporator of indoor unit usually is taken over to take over outdoor unit by technology by welding manner to be connected.But welding has operation
Complexity, there are the shortcomings of security risk for office operation.
Utility model content
The utility model is intended at least solve one of technical problem in the prior art.
For this purpose, the purpose of the one side of the utility model is, a kind of Anti-dismantling pipe connection device is provided.
The purpose of the other side of the utility model is, provides a kind of air-conditioning for including above-mentioned Anti-dismantling pipe connection device
Device.
To achieve the above object, the technical solution of the utility model one side provides a kind of Anti-dismantling pipe connection device,
Including：Pipe fitting；And union nut, the union nut include first connecting portion, the use for being connected with the pipe fitting
In connection with bell-mouthed first second connecting portion taken over, for the twisting portion that screws for tool and be connected to described the
Portion is twisted into two parts between two connecting portions and the twisting portion；Wherein, the portion of twisting into two parts in the pipe fitting and described can connect
The outer surface of forced breakage after pipe nut check, the first connecting portion and the second connecting portion is cylindrical surface.
The Anti-dismantling pipe connection device that the utility model above-mentioned technical proposal provides, passes through pipe fitting and union nut connecting tube
Road, and setting can twist into two parts portion between the second connecting portion of union nut and twisting portion, during assembling so that tool, which screws, to be taken over
The twisting portion of nut, when screwing torque and reaching packing torque, union nut and pipe joint locking realize that two connecting lines are close
Connection；Continue the twisting portion of twisting union nut after locking, before the peak torque that union nut can be born is reached, can twist into two parts
Portion because can not bear it is larger be broken when screwing torque, so as to fulfill second connecting portion and twisting part from；Due to the first connection
Portion and the outer surface of second connecting portion are all cylindrical surface, and take over spiral shell can not be reversely screwed by tool due to lacking force application plane
Mother so as to ensure that the non-dismountable property of pipe fitting and union nut, is avoided because accidentally dismounting leads to the hair of coolant leakage accident
Raw, simple in structure, easy to operate, processing and installation is at low cost；Secondly as pipe fitting be attached thereto take between usually adopt
With being welded to connect, can the portion of twisting into two parts be arranged on union nut, compared to can the portion of twisting into two parts be arranged on pipe fitting, can make to twist
Disconnected position is far from welding position, influence during so as to avoid twisting into two parts to welding position, and then ensures pipe fitting and connect between taking over
The reliability connect avoids causing the destruction of welding position leakage during fracture.
In addition, the Anti-dismantling pipe connection device that the utility model above-mentioned technical proposal provides can also have following supplementary technology
Feature：
In the above-mentioned technical solutions, the wall thickness for twisting into two parts portion is less than the wall thickness of the second connecting portion and the twisting
The wall thickness in portion.
In the technical scheme, the wall thickness that can twist into two parts portion is set to be less than the wall thickness of second connecting portion and the wall thickness in twisting portion,
The wall thickness that portion can be twisted into two parts is relatively thin, and portion can be twisted into two parts by advantageously ensuring that preferentially is broken during by turning moment.It needs
Understand, the second connection is less than for the wall thickness that for the different structure of the wall thickness of the portion of twisting into two parts in an axial direction, can twist into two parts portion
The wall thickness in portion and the wall thickness in twisting portion, you can the minimum wall thickness (MINI W.) of the portion of twisting into two parts in an axial direction is less than the wall thickness of second connecting portion and twisting portion
Wall thickness.
In the above-mentioned technical solutions, the wall thickness of the portion of twisting into two parts in an axial direction is identical, makes the outer surface that can twist into two parts portion
For cylindrical surface.
In the technical scheme, by can the portion of twisting into two parts be set as the identical cylinder of wall thickness in an axial direction, make can to twist into two parts portion plus
Work is simple, at low cost.
In the above-mentioned technical solutions, the second connecting portion be connected with the portion of twisting into two parts one end end face part protrusion
The outer surface for twisting into two parts portion forms first step, and the twisting portion is connected the end face part of one end with the portion of twisting into two parts
The outer surface that portion can be twisted into two parts described in protrusion forms second step.
In the technical scheme, first step is formed in the outer surface of second connecting portion Yu the junction that can twist into two parts portion, and
Form second step in the outer surface of twisting portion and the junction that portion can be twisted into two parts, it is ensured that can the wall thickness of the portion of twisting into two parts in an axial direction be respectively less than
Second connecting portion and the wall thickness in twisting portion, so that it is guaranteed that union nut when being screwed torque preferentially can the portion of twisting into two parts fracture,
And so that the easy to process of portion can be twisted into two parts.
In the above-mentioned technical solutions, the length for twisting into two parts portion is in the range of 3mm~5mm.
In the technical scheme, the length that can twist into two parts portion on the one hand cannot be excessive, and butt tube nut applies applied force when excessive
The central axes of square easily tilt, cause up and down two spanner twistings when the bad power of making；On the other hand can not be too small, block when too small
Ruler can not be caught in the size for measuring the minimum thickness that can twist into two parts portion, therefore model of the Design of length in 3mm~5mm that will can twist into two parts portion
In enclosing, it can twist into two parts at portion pair thickness that can twist into two parts portion to ensure that slide calliper rule can be caught in and measure, and butt tube nut is avoided to apply
The central axes of union nut tilt during stubborn torque of putting english.
In the above-mentioned technical solutions, the outer surface in the twisting portion is prismatic surface.
The outer surface in twisting portion is prismatic surface, and the outer surface butt tube nut convenient for passing through twisting tool clamping twisting portion is applied
It puts english stubborn power, realizes that pipe fitting is locked with union nut；Preferably, the outer surface in twisting portion is hexagonal structure.
In the above-mentioned technical solutions, the pipe fitting includes the third connecting portion coordinated with the first connecting portion, connect
It is used to contact the tapered portion to form sealing, Yi Jiyong with first horn mouth taken in the third connecting portion end
In the 4th connecting portion that connection second is taken over.
In the technical scheme, the second connecting portion of union nut is taken over first and is connect, the 4th connecting portion of pipe fitting
It takes over and connect with second, and when pipe fitting and union nut are locked, the tapered portion of the first horn mouth taken over and pipe fitting is supported
It connects and cooperatively forms sealing, thus by the cooperation of pipe fitting and union nut, realization first is taken over takes over sealed connection with second,
It avoids generating coolant leakage in the junction of the two, so that it is guaranteed that first takes over and the fastness of the second take over connection and sealing
Property.
In the above-mentioned technical solutions, the third connecting portion include external thread section, the first connecting portion include with it is described
The internal thread segment of external thread section cooperation；The union nut have axially through the first pilot hole, the second connecting portion
First pilot hole includes the taper wall surface of the hole being adapted with the bell shape；The pipe fitting have axially through second
Pilot hole, described second take over be inserted into the second pilot hole of the 4th connecting portion and with the 4th connecting portion weld connect
It connects；The outer surface of 4th connecting portion is prismatic surface.
In the above-mentioned technical solutions, the third connecting portion of pipe fitting and the first connecting portion of union nut are connected using screw thread
It connects, it is simple in structure, it is easy to assembly；4th connecting portion of pipe fitting and second take between using being welded to connect, to ensure that pipe connects
Head the fastness and leakproofness connecting are taken over second, prevent refrigerant through pipe fitting and second take between fit-up gap it is outside
Leakage；The outer surface of 4th connecting portion of pipe fitting is set as prismatic surface, convenient for screwing pipe fitting simultaneously with two twisting tools
Prismatic surface and union nut prismatic surface, realize that pipe fitting and union nut are locked.
In any of the above-described technical solution, in packing torque M1The lower the maximum shear stress τ that can twist into two parts portion1For：In peak torque M2The lower the maximum shear stress τ that can twist into two parts portion2For：The τ in the case of outer surface for twisting into two parts portion is non-porous sealing surface1With
τ2Meet：Wherein, t is the thickness that can be twisted into two parts at the wall thickness minimum in portion (for that can twist into two parts the wall thickness in portion
Situation identical in an axial direction, t are the wall thickness that can twist into two parts portion), d can twist into two parts the internal diameter in portion, σ for described inbFor the portion of twisting into two parts
Tensile strength.
In the technical scheme, the thickness t at the wall thickness minimum by that pair can twist into two parts portion is rationally designed, i.e., according to close
Envelope torque and peak torque give the size requirement for twisting into two parts union nut, so as to which portion can be twisted into two parts in packing torque and peak torque
Between be broken, wherein packing torque ensures that the tapered portion of pipe fitting and the first horn mouth taken over abut against and cooperatively forms effectively
Torque is screwed needed for sealing, peak torque is the sealing knot destroyed between the tapered portion of pipe fitting and the first horn mouth taken over
Structure and make the torque that screws needed for seal failure, so that it is guaranteed that can the torque that is born of the portion of twisting into two parts meet pipe fitting and take over spiral shell
Mother locking, the end tapered portion of the first horn mouth taken over and pipe fitting is made effectively to seal, and ensure can the portion of twisting into two parts born
Peak torque will not destroy sealing structure between the first horn mouth taken over and the tapered portion of pipe fitting, so as to fulfill can
The locking torque for twisting into two parts portion is controlled in rational range, is prevented coolant leakage, is further ensured that safety operation and use；Specifically
Ground, in the case of can twist into two parts the outer surface in portion as non-porous sealing surface, it is ensured that τ1And τ2Meet：Just can
Portion can be twisted into two parts by being effectively ensured is broken between packing torque and peak torque.
Another technical solution of the utility model provides a kind of air conditioner, including：Outdoor unit；And indoor unit, it is described
It is connected with first to circulate for refrigerant on one in outdoor unit and the indoor unit to take over, is connected with for refrigerant stream on another
Logical second is taken over, described first take over and described second take between by the Anti-dismantling pipe described in any of the above-described technical solution
Connection device is connected.
The air conditioner that the utility model above-mentioned technical proposal provides, because it includes the tamper described in any of the above-described technical solution
Pipe connection device is unloaded, thus with the advantageous effect of the Anti-dismantling pipe connection device described in any of the above-described technical solution, it is no longer superfluous herein
It states.
The additional aspect and advantage of the utility model will become apparent or new by this practicality in following description section
The practice of type is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment
Become apparent and be readily appreciated that, wherein：
Fig. 1 is the decomposition texture schematic diagram of Anti-dismantling pipe connection device described in the utility model one embodiment；
Fig. 2 is the dimensional structure diagram of union nut in Fig. 1；
Fig. 3 is the schematic cross-sectional view of Fig. 2；
Fig. 4 is the enlarged structure schematic diagram in A portions in Fig. 3.
Wherein, the correspondence in Fig. 1 to Fig. 4 between reference numeral and component names is：
1 union nut, 10 first pilot holes, 11 first connecting portions, 12 second connecting portions, 13 can twist into two parts portion, 14 twisting portions,
2 pipe fittings, 21 tapered portion, 22 third connecting portions, 23 the 4th connecting portions, 3 first take over, 31 horn mouths, and 4 second take over.
Specific embodiment
In order to be more clearly understood that the above-mentioned purpose of the utility model, feature and advantage, below in conjunction with the accompanying drawings and have
The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen
The feature in embodiment and embodiment please can be combined with each other.
Many details are elaborated in the following description in order to fully understand the utility model, still, this practicality
It is novel to be implemented using other different from mode described here, therefore, the scope of protection of the utility model not by
The limitation of following public specific embodiment.
1 to Fig. 4 the Anti-dismantling pipe connection device and air-conditioning according to some embodiments of the utility model are described with reference to the accompanying drawings
Device.
As shown in Figures 1 to 4, a kind of Anti-dismantling pipe connection device provided according to the utility model some embodiments, including：
Pipe fitting 2 and union nut 1.
Specifically, union nut 1 include for be connected with pipe fitting 2 first connecting portion 11, for connecting with loudspeaker
The second connecting portion 12 of first take over 3 of mouth 31 for the twisting portion 14 that screws for tool and is connected to second connecting portion
Portion 13 is twisted into two parts between 12 and twisting portion 14；Wherein, can twist into two parts portion 13 can after pipe fitting 2 and union nut 1 are locked by
Power is broken, and the outer surface of first connecting portion 11 and second connecting portion 12 is cylindrical surface.
The Anti-dismantling pipe connection device that the utility model above-described embodiment provides, passes through 1 connecting tube of pipe fitting 2 and union nut
Road, and setting can twist into two parts portion 13 between the second connecting portion 12 of union nut 1 and twisting portion 14, during assembling so that tool
The twisting portion 14 of union nut 1 is screwed, when screwing torque and reaching packing torque, union nut 1 and pipe fitting 2 are locked, and are realized
Two connecting lines closely connect；Continue the twisting portion 14 of twisting union nut 1 after locking, reaching what union nut 1 can be born
Before peak torque, can twist into two parts portion 13 because can not bear it is larger be broken when screwing torque, so as to fulfill second connecting portion 12 with
Twisting portion 14 detaches；It is flat due to lacking force since the outer surface of first connecting portion 11 and second connecting portion 12 is all cylindrical surface
Face and union nut 1 can not be reversely screwed by tool, so as to ensure that the non-dismountable property of pipe fitting 2 and union nut 1, keep away
Exempt from because accidentally dismounting leads to the generation of coolant leakage accident, simple in structure, easy to operate, processing and installation is at low cost；Next, by
In pipe fitting 2 and between taking over, generally use is welded to connect, and can be twisted into two parts portion 13 and is arranged on union nut 1, compared to can
It twists into two parts portion 13 to be arranged on pipe fitting 2, can make to twist into two parts position far from welding position, to welding position during so as to avoid twisting into two parts
It influences, and then the reliability for ensuring pipe fitting 2 and being connected between taking over, avoids that the destruction of welding position is caused and let out during fracture
Leakage.
Preferably, as shown in Fig. 2, the outer surface in twisting portion 14 is prismatic surface.
The outer surface in twisting portion 14 is prismatic surface, convenient for passing through the outer surface butt tube spiral shell in twisting tool clamping twisting portion 14
Mother 1, which applies, screws power, realizes that pipe fitting 2 is locked with union nut 1；Preferably, the outer surface in twisting portion 14 is hexagonal structure.
In some embodiments of the utility model, as shown in figure 3, the wall thickness that can twist into two parts portion 13 is less than second connecting portion 12
Wall thickness and twisting portion 14 wall thickness, you can the wall thickness for twisting into two parts portion 13 is relatively thin, advantageously ensure that can twist into two parts portion 13 by
Preferential fracture during turning moment.
It is to be appreciated that for it can twist into two parts the different structure of the wall thickness of portion 13 in an axial direction, portion 13 can be twisted into two parts
Wall thickness is less than the wall thickness of second connecting portion 12 and the wall thickness in twisting portion 14, you can twists into two parts the minimum wall thickness (MINI W.) of portion 13 in an axial direction and is less than the
The wall thickness of two connecting portions 14 and the wall thickness in twisting portion 14.
In one embodiment of the utility model, as shown in Figures 1 to 4, it is identical to twist into two parts the wall thickness of portion 13 in an axial direction,
The outer surface for making that portion 13 can be twisted into two parts is cylindrical surface.
It will can twist into two parts portion 13 and be set as the identical cylinder of wall thickness in an axial direction, make the processing that can twist into two parts portion 13 simple, cost
It is low.
In one embodiment of the utility model, as shown in Figures 1 to 4, second connecting portion 12 is with that can twist into two parts 13 phase of portion
The outer surface that the end face part protrusion of connection one end can twist into two parts portion 13 forms first step, and twisting portion 14 is connected with that can twist into two parts portion 13
The outer surface formation second step in portion 13 can be twisted into two parts by connecing the end face part protrusion of one end.
The outer surface of second connecting portion 12 Yu the junction that can twist into two parts portion 13 formed first step, and twisting portion 14 with
The outer surface that the junction in portion 13 can be twisted into two parts forms second step, it is ensured that can twist into two parts the wall thickness of portion 13 in an axial direction and be respectively less than the second company
Socket part 12 and the wall thickness in twisting portion 14, so that it is guaranteed that union nut 1 is preferentially broken can twist into two parts portion 13 when being screwed torque,
And so that the easy to process of portion 13 can be twisted into two parts.
In one embodiment of the utility model, the length in portion 13 can be twisted into two parts in the range of 3mm~5mm.
The length that portion 13 can be twisted into two parts on the one hand cannot be excessive, and butt tube nut 1 applies the central axes appearance of torque when excessive
Easily tilt, cause up and down two spanner twistings when the bad power of making；On the other hand can not be too small, slide calliper rule can not be caught in survey when too small
Amount can twist into two parts the size of the minimum thickness in portion 13, therefore will can twist into two parts the Design of length in portion 13 in the range of 3mm~5mm, with
Pair thickness that can twist into two parts portion 13 can be twisted into two parts at portion 13 and measure, and butt tube nut 1 is avoided to apply by ensuring that slide calliper rule can be caught in
The central axes of union nut 1 tilt when screwing torque.
In one embodiment of the utility model, as shown in figures 1 and 3, pipe fitting 2 includes matching with first connecting portion 11
The third connecting portion 22 of conjunction is connected to 22 end of third connecting portion to be formed for contacting with the horn mouth 31 of the first take over 3
The tapered portion 21 of sealing and the 4th connecting portion 23 for connecting the second take over 4.
The second connecting portion 12 of union nut 1 is connect with the first take over 3, and the 4th connecting portion 23 of pipe fitting 2 connects with second
Pipe 4 connects, and when pipe fitting 2 and union nut 1 are locked, the horn mouth 31 of the first take over 3 is supported with the tapered portion 21 of pipe fitting 2
It connects and cooperatively forms sealing, so as to by the cooperation of pipe fitting 2 and union nut 1, realize 4 sealing of the first take over 3 and the second take over
Connection avoids generating coolant leakage in the junction of the two, so that it is guaranteed that the fastness of 4 connection of the first take over 3 and the second take over
With leakproofness.
Further, as depicted in figs. 1 and 2, third connecting portion 22 include external thread section, first connecting portion 11 include with it is outer
The internal thread segment of thread segment cooperation；Union nut 1 have axially through the first pilot hole 10, second connecting portion 12 first dress
Distribution 10 includes the taper wall surface of the hole being adapted with 31 shape of horn mouth；Pipe fitting 2 have axially through the second pilot hole, the
It is welded to connect in second pilot hole of the 4th connecting portion 23 of two take overs, 4 insertion and with the 4th connecting portion 23；4th connecting portion 23
Outer surface is prismatic surface.
The third connecting portion 22 of pipe fitting 2 is used with the first connecting portion 11 of union nut 1 and is threadedly coupled, simple in structure,
It is easy to assembly；Using being welded to connect between 4th connecting portion 23 of pipe fitting 2 and the second take over 4, to ensure pipe fitting 2 and second
The fastness and leakproofness of 4 connection of take over prevent refrigerant from being leaked out through the fit-up gap between 2 and second take over 4 of pipe fitting；
The outer surface of 4th connecting portion 23 of pipe fitting 2 is set as prismatic surface, convenient for screwing pipe fitting 2 simultaneously with two twisting tools
The prismatic surface of prismatic surface and union nut 1 realizes that pipe fitting 2 is locked with union nut 1.
In some embodiments of the utility model, in packing torque M1The maximum shear stress τ in portion 13 can be twisted into two parts down1For：In peak torque M2The maximum shear stress τ in portion 13 can be twisted into two parts down2For：τ in the case of can twist into two parts the outer surface in portion 13 as non-porous sealing surface1And τ2
Meet：Wherein, t is that can twist into two parts thickness at the wall thickness minimum in portion 13 (for that can twist into two parts the wall thickness edge in portion 13
Axial identical situation, t is the wall thickness that can twist into two parts portion 13), d is the internal diameter that can twist into two parts portion 13, σbFor the tension in portion 13 can be twisted into two parts
Intensity.
The thickness t at wall thickness minimum by that couple can twist into two parts portion 13 is rationally designed, i.e., according to packing torque and maximum
Torque gives the size requirement for twisting into two parts union nut 1, is broken between packing torque and peak torque so as to which portion 13 can be twisted into two parts,
Wherein packing torque ensure the tapered portion 21 of pipe fitting 2 and the horn mouth 31 of the first take over 3 abut against cooperatively form it is effective close
Torque is screwed needed for envelope, and peak torque is close between the horn mouth 31 for 21 and first take over 3 of tapered portion for destroying pipe fitting 2
Seal structure and make the torque that screws needed for seal failure, meet so that it is guaranteed that the torque that is born in portion 13 can be twisted into two parts by pipe fitting 2
It is locked with union nut 1, the horn mouth 31 of the first take over 3 is made effectively to be sealed, and ensure with the end tapered portion 21 of pipe fitting 2
The peak torque born in portion 13, which can be twisted into two parts, will not destroy between the horn mouth 31 of the first take over 3 and the tapered portion of pipe fitting 2
Sealing structure controls in rational range so as to fulfill by the locking torque that can twist into two parts portion 13, prevents coolant leakage, further
Ensure safety operation and use；Specifically, in the case of can twist into two parts the outer surface in portion 13 as non-porous sealing surface, such as Fig. 1 extremely
Situation shown in Fig. 4, it is ensured that τ1And τ2Meet：Just can effectively ensure that can twist into two parts portion 13 in packing torque and most
It is broken between large torque.
In one specific embodiment, union nut 1 extrudes bar for copper, can twist into two parts the suitable minimum thickness in portion 13 and be
0.3mm~0.7mm.
The utility model another embodiment provides for a kind of air conditioner (not shown), including：Outdoor unit and room
Interior machine is connected with the first take over 3 circulated for refrigerant on one in outdoor unit and indoor unit, is connected with for refrigerant on another
Second take over 4 of circulation, passes through the Anti-dismantling pipe connection device phase of any of the above-described embodiment between the first take over 3 and the second take over 4
Connection.
The air conditioner that the utility model above-described embodiment provides, the Anti-dismantling pipe described in any of the above-described embodiment is included because of it
Connection device, thus with the advantageous effect of the Anti-dismantling pipe connection device described in any of the above-described embodiment, details are not described herein.
In conclusion the Anti-dismantling pipe connection device that the utility model embodiment provides, during assembling, union nut and pipe fitting
After locking continue twisting union nut twisting portion, make the portion of twisting into two parts because can not bear it is larger be broken when screwing torque, ensure pipe
The non-dismountable property of connector and union nut is avoided because accidentally dismounting leads to the generation of coolant leakage accident, simple in structure, operation side
Just, processing and installation is at low cost；The locking torque that portion can be twisted into two parts is controlled between packing torque and peak torque, prevents refrigerant
Leakage ensures safety operation and use；Can the portion of twisting into two parts be located on union nut, make to twist into two parts position far from pipe fitting and take over it
Between welding position, influence during so as to avoid twisting into two parts to welding position avoids causing the destruction of welding position during fracture
Leakage.
In the description of the utility model, it is to be understood that the orientation or position relationship of the instructions such as term " on ", " under " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description rather than instruction
Or imply that signified device or unit must have specific direction, with specific azimuth configuration and operation, it is thus impossible to understand
For the limitation to the utility model.
In the description of the present invention, unless otherwise clearly defined and limited, term " connected ", " connection ", " Gu
It is fixed " etc. should all be interpreted broadly, for example, " connection " can be fixedly connected or be detachably connected or integrally connect
It connects or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary.For the ordinary skill people of this field
For member, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that combining the particular features, structures, materials, or characteristics that the embodiment or example describe is contained at least the one of the utility model
In a embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment
Or example.Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more embodiments or example
In combine in an appropriate manner.
It these are only the preferred embodiment of the utility model, be not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of Anti-dismantling pipe connection device, which is characterized in that including：
Pipe fitting；With
Union nut, the union nut include for be connected with the pipe fitting first connecting portion, have for connecting
Bell-mouthed first second connecting portion taken over, for the twisting portion that screws for tool and be connected to the second connecting portion and
Portion is twisted into two parts between the twisting portion；
Wherein, the portion of twisting into two parts can the pipe fitting and the union nut locking after forced breakage, it is described first connect
The outer surface of socket part and the second connecting portion is cylindrical surface.
2. Anti-dismantling pipe connection device according to claim 1, which is characterized in that
The wall thickness for twisting into two parts portion is less than the wall thickness of the second connecting portion and the wall thickness in the twisting portion.
3. Anti-dismantling pipe connection device according to claim 2, which is characterized in that
The wall thickness of the portion of twisting into two parts in an axial direction is identical, and it is cylindrical surface to make the outer surface that can twist into two parts portion.
4. Anti-dismantling pipe connection device according to claim 2, which is characterized in that
The second connecting portion is connected with the portion of twisting into two parts can twist into two parts the outer surface in portion described in the end face part protrusion of one end
First step is formed, the twisting portion is connected with the portion of twisting into two parts can twist into two parts the outer of portion described in the end face part protrusion of one end
Surface forms second step.
5. Anti-dismantling pipe connection device according to claim 1, which is characterized in that
The length for twisting into two parts portion is in the range of 3mm~5mm.
6. Anti-dismantling pipe connection device according to claim 1, which is characterized in that
The outer surface in the twisting portion is prismatic surface.
7. Anti-dismantling pipe connection device according to claim 1, which is characterized in that
The pipe fitting includes the third connecting portion coordinated with the first connecting portion, is connected to the third connecting portion end use
In the tapered portion to form sealing is contacted with first horn mouth taken over and for connect second take over the 4th connect
Socket part.
8. Anti-dismantling pipe connection device according to claim 7, which is characterized in that
The third connecting portion includes external thread section, and the first connecting portion includes the internal thread coordinated with the external thread section
Section；
The union nut have axially through the first pilot hole, the first pilot hole of the second connecting portion include with it is described
The taper wall surface of the hole that bell shape is adapted；
The pipe fitting have axially through the second pilot hole, described second takes over the second dress for being inserted into the 4th connecting portion
It is welded to connect in distribution and with the 4th connecting portion；
The outer surface of 4th connecting portion is prismatic surface.
9. Anti-dismantling pipe connection device according to any one of claim 1 to 8, which is characterized in that
In packing torque M1The lower the maximum shear stress τ that can twist into two parts portion1For：
In peak torque M2The lower the maximum shear stress τ that can twist into two parts portion2For：
The τ in the case of outer surface for twisting into two parts portion is non-porous sealing surface1And τ2Meet：
Wherein, t is the thickness that can be twisted into two parts at the wall thickness minimum in portion, and d can twist into two parts the internal diameter in portion, σ for described inbIt is twisted to be described
The tensile strength in disconnected portion.
10. a kind of air conditioner, which is characterized in that including：
Outdoor unit；With
Indoor unit is connected with first to circulate for refrigerant on one in the outdoor unit and the indoor unit and takes over, another
On be connected with second to circulate for refrigerant and take over, described first take over and described second take between by such as claim 1 to 9
Any one of described in Anti-dismantling pipe connection device be connected.
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| CN201721617381.3U CN207470950U (en) | 2017-11-28 | 2017-11-28 | Anti-dismantling pipe connection device and air conditioner |
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| CN201721617381.3U CN207470950U (en) | 2017-11-28 | 2017-11-28 | Anti-dismantling pipe connection device and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883085A (en) * | 2017-11-28 | 2018-04-06 | 广东美的制冷设备有限公司 | Anti-dismantling pipe connection device and air conditioner |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883085A (en) * | 2017-11-28 | 2018-04-06 | 广东美的制冷设备有限公司 | Anti-dismantling pipe connection device and air conditioner |
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