CN107883083A - Anti-dismantling pipe connection device and air conditioner - Google Patents

Anti-dismantling pipe connection device and air conditioner Download PDF

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Publication number
CN107883083A
CN107883083A CN201711217468.6A CN201711217468A CN107883083A CN 107883083 A CN107883083 A CN 107883083A CN 201711217468 A CN201711217468 A CN 201711217468A CN 107883083 A CN107883083 A CN 107883083A
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CN
China
Prior art keywords
parts
mrow
twisting
connecting portion
twist
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711217468.6A
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Chinese (zh)
Inventor
邱文辉
陈勇
刘艳涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Guangdong Midea Refrigeration Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Midea Refrigeration Equipment Co Ltd filed Critical Guangdong Midea Refrigeration Equipment Co Ltd
Priority to CN201711217468.6A priority Critical patent/CN107883083A/en
Publication of CN107883083A publication Critical patent/CN107883083A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/08—Screw-threaded joints; Forms of screw-threads for such joints with supplementary elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Pressure Members (AREA)

Abstract

The invention provides a kind of Anti-dismantling pipe connection device and air conditioner.Anti-dismantling pipe connection device includes：Pipe joint and union nut, first connecting portion that union nut includes being used to be connected with pipe joint, there is for be connected the second connecting portion of the bell-mouthed first adapter, for supplying the twisting portion that screws of instrument and being connected between second connecting portion and twisting portion to twist into two parts portion, the wall thickness that portion can be twisted into two parts is gradually reduced from its both ends to middle part vertically, the middle part forced breakage in portion can twisted into two parts after pipe joint and union nut locking by enabling to twist into two parts portion, and the outer surface of first connecting portion and second connecting portion is the face of cylinder.Above-mentioned technical proposal, can the portion's of twisting into two parts fracture, ensure the non-dismountable property of pipe joint and union nut, avoid because dismounting causes coolant leakage by mistake；Positioned at that can twist into two parts in the middle part of portion at wall thickness minimum, facilitate in process using slide calliper rule to carrying out dimensional check at wall thickness minimum, while avoid causing the destruction of second connecting portion leakage during fracture.

Description

Anti-dismantling pipe connection device and air conditioner
Technical field
The present invention relates to air-conditioning technical field, more specifically, is related to a kind of Anti-dismantling pipe connection device and a kind of air conditioner.
Background technology
At present, indoor set is connected by detachable air conditioner generally use pipe joint with union nut with the pipeline of outdoor unit Connect.Existing pipe joint and union nut are mainly made up of thread segment and prism section two parts, and prism section has force application plane, are led to Cross and clockwise moment is applied to the prism section of pipe joint and union nut, rotate together with thread segment and be fitted close to form sealing Face, refrigerant is set to circulate so as to which indoor set be connected with the pipeline of outdoor unit.But by applying counterclockwise force to prism section Square can equally make thread segment together rotate counterclockwise, so as to which the cooperation of pipe joint and union nut be unclamped, i.e., pipe joint with There is dismounting between union nut.
But for the air conditioner using flammable refrigerant, in order to avoid causing coolant leakage to trigger peace because dismantling by mistake 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 adapter of indoor set is generally connected by technology by welding manner with outdoor unit adapter.But welding has operation The shortcomings of security risk be present in complicated, office operation.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art.
Therefore, the purpose of one aspect of the present invention is, there is provided a kind of Anti-dismantling pipe connection device.
The purpose of another aspect of the present invention is, there is provided a kind of air conditioner for including above-mentioned Anti-dismantling pipe connection device.
To achieve the above object, technical scheme provides a kind of Anti-dismantling pipe connection device, including：Pipe joint； And union nut, the union nut include be used for be connected with the pipe joint first connecting portion, for being connected with loudspeaker The second connecting portion of first adapter of mouth, for the twisting portion that screws for instrument and it is connected to the second connecting portion and institute State and twist into two parts portion between twisting portion；Wherein, the wall thickness for twisting into two parts portion is gradually reduced from its both ends to middle part vertically, is made The portion of twisting into two parts can after the pipe joint and union nut locking in the middle part forced breakage for twisting into two parts portion, The outer surface of the first connecting portion and the second connecting portion is the face of cylinder.
The Anti-dismantling pipe connection device that above-mentioned technical proposal of the present invention provides, by pipe joint and union nut connecting line, And portion can be twisted into two parts by being set between the second connecting portion of union nut and twisting portion, during assembling so that instrument screws adapter spiral shell Female twisting portion, when screwing torque and reaching packing torque, union nut and pipe joint locking, realize that two connecting lines closely connect Connect；Continue the twisting portion of twisting union nut after locking, before the peak torque that union nut can be born is reached, portion can be twisted into two parts Because can not bear it is larger screw torque be broken, so as to realize second connecting portion and twisting part from；Due to first connecting portion Outer surface with second connecting portion is all the face of cylinder, and adapter spiral shell can not be reversely screwed by instrument due to lacking force application plane Mother, so as to ensure that the non-dismountable property of pipe joint and union nut, avoid because dismounting causes the hair of coolant leakage accident by mistake Raw, simple in construction, easy to operate, processing and installation cost is low；Secondly as generally use welding connects between pipe joint and adapter 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 joint, can make to twist into two parts position remote From welding position, influence during so as to avoid twisting into two parts to welding position, and then ensure to connect between pipe joint and adapter reliable Property, avoid causing the destruction of welding position leakage during fracture；Portion middle can be twisted into two parts due to being located at wall thickness minimum, it is convenient Using slide calliper rule to carrying out dimensional check at wall thickness minimum in process, while fracture occurs at the wall that can be twisted into two parts among portion At thick minimum, cause leakage to the destruction of second connecting portion when avoiding fracture.
In addition, the Anti-dismantling pipe connection device that above-mentioned technical proposal of the present invention provides can also have following supplementary technology special Sign：
In the above-mentioned technical solutions, it is described twist into two parts portion be connected with the second connecting portion one end wall thickness be less than it is described The wall thickness of second connecting portion, and it is described twist into two parts portion be connected with the twisting portion one end wall thickness be less than the twisting portion wall It is thick.
In the technical scheme, that is, ensure can the wall thickness of the portion of twisting into two parts vertically be respectively less than the wall thickness and twisting of second connecting portion The wall thickness in portion, you can it is relatively thin to twist into two parts the wall thickness in portion, advantageously ensures that can to twist into two parts portion preferential during by turning moment Fracture.
In the above-mentioned technical solutions, the wall thickness for twisting into two parts portion V-shaped change vertically, make described to twist into two parts the outer of portion Surface is double round table surfaces.
In the technical scheme, portion outer surface can be twisted into two parts and be arranged to double round table surfaces, the V-shaped change vertically of its wall thickness, Wall thickness close to second connecting portion and close to twisting portion is relatively large, relatively small close to middle wall thickness, is advantageous to twist into two parts Preferentially it is broken in wall thickness smaller part position when portion is screwed torque；Portion middle can be twisted into two parts due to being located at wall thickness minimum, it is convenient Using slide calliper rule to carrying out dimensional check at wall thickness minimum in process；Fracture occurs at the wall that can be twisted into two parts among portion simultaneously At thick minimum, cause leakage to the destruction of second connecting portion when avoiding fracture.
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, due to needing accurate control to twist into two parts the minimum thickness in portion, in second connecting portion with that can twist The outer surface of the junction in disconnected portion forms first step, and second is formed in the outer surface of the portion of twisting into two parts and the junction that can twist into two parts portion Rank, the gradient of the double round table surfaces for the outer surface formation that can twist into two parts portion can be so effectively reduced, is easy to vernier calliper in process Chi is caught in the minimum place of thickness and measures its thickness, avoids the round platform gradient of large size nut larger, cause slide calliper rule can not be caught in measure from And the problem of being difficult to ensure that thickness.
In the above-mentioned technical solutions, the side of the excessively described vertical section for twisting into two parts portion's axis is V-shaped, the V-arrangement side Two oblique line sections are respectively less than 20 degree with the angle for twisting into two parts portion's axis.
In the technical scheme, the side for crossing the vertical section that can twist into two parts portion's axis is V-shaped, you can the outer surface for twisting into two parts portion is Double round table surfaces, the angle that two oblique line Duan Yuke of V-arrangement side twist into two parts portion's axis are respectively less than 20 degree, to ensure between two round table surfaces Larger angle is formed, the wall thickness that being easy to slide measure pair can twist into two parts at portion's wall thickness minimum measures.
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 can not be excessive, and butt tube nut applies applying power when excessive The axis of square easily tilts, 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 Chi can not be caught in the size that measurement can twist into two parts the minimum thickness in 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, avoid butt tube nut to apply again The axis of union nut tilts during stubborn torque of putting english.
In the above-mentioned technical solutions, the pipe joint include with the first connecting portion coordinate the 3rd connecting portion, be connected It is used to abut the tapered portion for cooperatively forming sealing, Yi Jiyong with the horn mouth of the described first adapter in the 3rd connecting portion end In the 4th connecting portion of the adapter of connection second.
In the technical scheme, the second connecting portion of union nut connects with the first adapter, the 4th connecting portion of pipe joint Connected with the second adapter, and when pipe joint and union nut are locked, the horn mouth of the first adapter and the tapered portion of pipe joint are supported Connect and cooperatively form sealing, so that by the cooperation of pipe joint and union nut, realize that the first adapter is tightly connected with the second adapter, Avoid producing coolant leakage in both junctions, so that it is guaranteed that the fastness and sealing of the first adapter and the second adapter connection Property.
In the above-mentioned technical solutions, the 3rd connecting portion includes external thread section, the first connecting portion include with it is described The internal thread segment that external thread section coordinates；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 joint have axially through second Pilot hole, described second takes in the second pilot hole for inserting the 4th connecting portion and welds company with the 4th connecting portion Connect；The outer surface of 4th connecting portion is prismatic surface, and the outer surface in the twisting portion is prismatic surface.
In the technical scheme, the 3rd connecting portion of pipe joint is used with the first connecting portion of union nut and is threadedly coupled, It is simple in construction, it is easy to assembly；Using being welded to connect between 4th connecting portion of pipe joint and the second adapter, with ensure pipe joint with The fastness and sealing of second adapter connection, prevent refrigerant through the fit-up gap between pipe joint and the second adapter to leaking Leakage；The outer surface of 4th connecting portion of pipe joint is arranged to prismatic surface, and the outer surface in the twisting portion of union nut is arranged to prism Face, it is easy to two twisting instruments while screws the prismatic surface of pipe joint and the prismatic surface of union nut, realize pipe joint with connecing Pipe nut check；Preferably, the outer surface of the 4th connecting portion is hexagonal structure, and the outer surface in twisting portion is hexagonal structure.
In any of the above-described technical scheme, 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 at the wall thickness minimum that can twist into two parts portion, and d can twist into two parts portion to be described Internal diameter, σbFor the tensile strength for twisting into two parts portion.
In the technical scheme, the thickness t at wall thickness minimum by that couple can twist into two parts portion is rationally designed, i.e., according to close Envelope moment of torsion 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 is to ensure that the horn mouth of the tapered portion of pipe joint and the first adapter abuts against to cooperatively form effectively Torque is screwed needed for sealing, peak torque is the sealing knot destroyed between the tapered portion of pipe joint and the horn mouth of the first adapter Structure and make the torque that screws needed for seal failure, so that it is guaranteed that can the moment of torsion that is born of the portion of twisting into two parts meet pipe joint and adapter spiral shell Mother locking, the horn mouth of the first adapter and the end tapered portion of pipe joint is effectively sealed, and ensure can the portion of twisting into two parts born The sealing structure that will not destroy between the horn mouth of the first adapter and the tapered portion of pipe joint of peak torque, can so as to realize The locking torque for twisting into two parts portion is controlled in rational scope, 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 and be 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 scheme of the present invention provides a kind of air conditioner, including：Outdoor unit；And indoor set, the outdoor The first adapter of cooling matchmaker circulation is connected with one in machine and the indoor set, cooling matchmaker circulation is connected with another Second adapter, it is hinged between first adapter and second adapter by the Anti-dismantling pipe described in any of the above-described technical scheme Put and be connected.
The air conditioner that above-mentioned technical proposal of the present invention provides, the Anti-dismantling pipe described in any of the above-described technical scheme is included because of it Connection device, thus with the beneficial effect of the Anti-dismantling pipe connection device described in any of the above-described technical scheme, will not be repeated here.
The additional aspect and advantage of the present invention will become obvious in following description section, or the practice by the present invention Recognize.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment Substantially and it is readily appreciated that, wherein：
Fig. 1 is the decomposition texture schematic diagram of Anti-dismantling pipe connection device described in one embodiment of the invention；
Fig. 2 is the dimensional structure diagram of union nut in Fig. 1；
Fig. 3 is Fig. 2 cross section structure diagram；
Fig. 4 is the mplifying structure schematic diagram in A portions in Fig. 3.
Wherein, corresponding relations of the Fig. 1 into Fig. 4 between reference 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 joints, 21 tapered portion, 22 the 3rd connecting portions, 23 the 4th connecting portions, 3 first adapters, 31 horn mouths, 4 second adapters.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting, the implementation of the application Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also By using other be different from it is described here in a manner of implement, therefore, protection scope of the present invention is not by following public tool The limitation of body embodiment.
The Anti-dismantling pipe connection device and air conditioner of 1 to Fig. 4 description according to some embodiments of the invention with reference to the accompanying drawings.
As shown in Figures 1 to 4, a kind of Anti-dismantling pipe connection device provided according to some embodiments of the invention, including：Pipe connects First 2 and union nut 1.
Specifically, union nut 1 include be used for be connected with pipe joint 2 first connecting portion 11, for being connected with loudspeaker The second connecting portion 12 of first adapter 3 of mouth 31, for the twisting portion 14 that screws for instrument and it is connected to second connecting portion Portion 13 is twisted into two parts between 12 and twisting portion 14；Wherein, the wall thickness that can twist into two parts portion 13 gradually subtracts from its both ends to middle part vertically Small, the middle part forced breakage in portion 13 can twisted into two parts after pipe joint 2 and union nut 1 are locked by enabling to twist into two parts portion 13, and first The outer surface of connecting portion 11 and second connecting portion 12 is the face of cylinder.
The Anti-dismantling pipe connection device that the above embodiment of the present invention provides, by pipe joint 2 and the connecting line of union nut 1, And portion 13 can be twisted into two parts by being set between the second connecting portion 12 of union nut 1 and twisting portion 14, during assembling so that instrument screws The twisting portion 14 of union nut 1, when screwing torque and reaching packing torque, union nut 1 and pipe joint 2 are locked, and realize two companies Adapter road closely connects；Continue the twisting portion 14 of twisting union nut 1 after locking, in the maximum that reaches union nut 1 and can bear Before moment of torsion, can twist into two parts portion 13 because can not bear it is larger screw torque be broken, so as to realize second connecting portion 12 and twisting Portion 14 separates；Because the outer surface of first connecting portion 11 and second connecting portion 12 is all the face of cylinder, due to lacking force application plane and Union nut 1 can not be reversely screwed by instrument, so as to ensure that the non-dismountable property of pipe joint 2 and union nut 1, is avoided Because dismounting causes the generation of coolant leakage accident by mistake, simple in construction, easy to operate, processing and installation cost is low；Secondly as pipe Generally use is welded to connect between joint 2 and adapter, can be twisted into two parts portion 13 and is arranged on union nut 1, compared to can twist into two parts Portion 13 is arranged on pipe joint 2, can make to twist into two parts to be located away from welding position, to the shadow of welding position during so as to avoid twisting into two parts Ring, and then ensure the reliability connected between pipe joint 2 and adapter, avoid that the destruction of welding position is caused and let out during fracture Leakage；Due to, positioned at the middle of portion 13 can be twisted into two parts, facilitating at wall thickness minimum in process using slide calliper rule to being carried out at wall thickness minimum Dimensional check, while fracture is occurred at the wall thickness minimum that can be twisted into two parts among portion 13, is connected when avoiding fracture to second The destruction in portion 12 and cause 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, is easy to clamp the outer surface butt tube spiral shell in twisting portion 14 by twisting instrument Mother 1, which applies, screws power, realizes that pipe joint 2 is locked with union nut 1；Preferably, the outer surface in twisting portion 14 is hexagonal structure.
In one embodiment of the invention, it is connected as shown in figure 3, portion 13 can be twisted into two parts with second connecting portion 12 one end Wall thickness is less than the wall thickness of second connecting portion 12, and can twist into two parts be connected with twisting portion 14 wall thickness of one end of portion 13 and be less than twisting portion 14 Wall thickness.
The wall thickness of portion 13 vertically can be twisted into two parts by, which ensuring, is respectively less than the wall thickness of second connecting portion 12 and the wall thickness in twisting portion 14, It is relatively thin that the wall thickness in portion 13 can be twisted into two parts, portion 13 can be twisted into two parts by advantageously ensuring that preferentially is broken during by turning moment.
In one embodiment of the invention, as shown in Figures 1 to 4, the wall thickness V-shaped change vertically in portion 13 can be twisted into two parts Change, the outer surface for making that portion 13 can be twisted into two parts is double round table surfaces.
The outer surface of portion 13 can be twisted into two parts and be arranged to double round table surfaces, its wall thickness V-shaped change vertically, close to second connecting portion 12 and wall thickness close to twisting portion 14 it is relatively large, relatively small close to middle wall thickness, portion 13 can be twisted into two parts by, which being advantageous to, is revolved Preferentially it is broken in wall thickness smaller part position when twisting torque；Due to, positioned at the middle of portion 13 can be twisted into two parts, facilitating processed at wall thickness minimum Using slide calliper rule to carrying out dimensional check at wall thickness minimum in journey；It is broken simultaneously and occurs at the wall thickness that can twist into two parts the centre of portion 13 most Small place, destruction when avoiding fracture to second connecting portion 12 and cause leakage.
In one embodiment of the invention, as shown in Figure 2, Figure 3 and Figure 4, second connecting portion 12 is with that can twist into two parts the phase of portion 13 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.
Due to needing accurate control to twist into two parts the minimum thickness in portion 13, in second connecting portion 12 and the connection that portion 13 can be twisted into two parts The outer surface at place forms first step, forms second step in the outer surface of the portion of twisting into two parts and the junction that can twist into two parts portion 13, so The gradient of the double round table surfaces for the outer surface formation that can twist into two parts portion 13 can be effectively reduced, is easy to slide measure in process to be caught in Its thickness is measured at thickness minimum, avoids the round platform gradient of large size nut larger, causes slide calliper rule can not be caught in measurement so as to be difficult to The problem of ensureing thickness.
In one embodiment of the invention, as shown in Figure 3 and Figure 4, the side for the vertical section that can twist into two parts the axis of portion 13 is crossed V-shaped, the angle that two oblique line Duan Yuke of V-arrangement side twist into two parts the axis of portion 13 is respectively less than 20 degree.
The side for crossing the vertical section that can twist into two parts the axis of portion 13 is V-shaped, you can the outer surface for twisting into two parts portion 13 is double round table surfaces, V The angle that two oblique line Duan Yuke of shape side twist into two parts the axis of portion 13 is respectively less than 20 degree, larger to ensure to be formed between two round table surfaces Angle, the wall thickness that being easy to slide measure pair can twist into two parts at portion 13 wall thickness minimum measures.
In one embodiment of the invention, 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 can not be excessive, and the axis of butt tube nut application torque is easy when excessive 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 measurement when too small It 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 true Pair thickness that can twist into two parts portion 13 can be twisted into two parts at portion 13 and measure by protecting slide calliper rule and being caught in, and avoided butt tube nut to apply again and screwed The axis of union nut tilts during torque.
In one embodiment of the invention, as shown in figures 1 and 3, pipe joint 2 includes what is coordinated with first connecting portion 11 3rd connecting portion 22, it is connected to the end of the 3rd connecting portion 22 and is used to abut with the horn mouth 31 of the first adapter 3 and cooperatively form sealing Tapered portion 21 and for connect the second adapter 4 the 4th connecting portion 23.
The second connecting portion 12 of union nut 1 is connected with the first adapter 3, and the 4th connecting portion 23 of pipe joint 2 connects with second Pipe 4 connects, and when pipe joint 2 and union nut 1 are locked, the horn mouth 31 of the first adapter 3 supports with the tapered portion 21 of pipe joint 2 Connect and cooperatively form sealing, so as to by the cooperation of pipe joint 2 and union nut 1, realize that the first adapter 3 and the second adapter 4 seal Connection, avoid producing coolant leakage in both junctions, so that it is guaranteed that the fastness of the first adapter 3 and the second adapter 4 connection With sealing.
Further, as shown in figures 1 and 3, the 3rd connecting portion 22 includes external thread section, first connecting portion 11 include with it is outer The internal thread segment that thread segment coordinates；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 the shape of horn mouth 31；Pipe joint 2 have axially through the second pilot hole, the It is welded to connect in second pilot hole of two adapters 4 the 4th connecting portion 23 of insertion and with the 4th connecting portion 23；4th connecting portion 23 Outer surface is prismatic surface, and the outer surface in twisting portion 14 is prismatic surface.
3rd connecting portion 22 of pipe joint 2 is used with the first connecting portion 11 of union nut 1 and is threadedly coupled, simple in construction, It is easy to assembly；Using being welded to connect between 4th connecting portion 23 of pipe joint 2 and the second adapter 4, to ensure pipe joint 2 and second The fastness and sealing that adapter 4 connects, prevent refrigerant from being leaked out through the fit-up gap between the adapter 4 of pipe joint 2 and second； The outer surface of 4th connecting portion 23 of pipe joint 2 is arranged to prismatic surface, and the outer surface in the twisting portion 14 of union nut 1 is arranged to rib Cylinder, it is easy to two twisting instruments while screws the prismatic surface of pipe joint 2 and the prismatic surface of union nut 1, realize pipe joint 2 Locked with union nut 1.
In some embodiments of the invention, 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 and be non-porous sealing surface1And τ2 Meet：Wherein, t is the thickness at the minimum place of wall thickness that can twist into two parts portion 13, and d is can twist into two parts the internal diameter in portion 13, σb For the tensile strength in portion 13 can be twisted into two parts.
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 Moment of torsion gives the size requirement for twisting into two parts union nut 1, is broken so as to which portion 13 can be twisted into two parts between packing torque and peak torque, Wherein packing torque ensure the tapered portion 21 of pipe joint 2 and the horn mouth 31 of the first adapter 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 the adapter 3 of tapered portion 21 and first for destroying pipe joint 2 Seal structure and make the torque that screws needed for seal failure, meet so that it is guaranteed that the moment of torsion that is born in portion 13 can be twisted into two parts by pipe joint 2 Locked with union nut 1, the horn mouth 31 of the first adapter 3 is effectively sealed with the end tapered portion 21 of pipe joint 2, and ensure 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 adapter 3 and the tapered portion of pipe joint 2 Sealing structure, the locking torque that can twist into two parts portion 13 is controlled in rational scope so as to realize, 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 and be 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 high pulling torque.
An alternative embodiment of the invention provides a kind of air conditioner (not shown), including：Outdoor unit and indoor set, The first adapter 3 of cooling matchmaker circulation is connected with one in outdoor unit and indoor set, cooling matchmaker is connected with another and is circulated The second adapter 4, be connected between the first adapter 3 and the second adapter 4 by the Anti-dismantling pipe connection device of any of the above-described embodiment.
The air conditioner that the above embodiment of the present invention provides, the Anti-dismantling pipe tipping described in any of the above-described embodiment is included because of it Put, thus with the beneficial effect of the Anti-dismantling pipe connection device described in any of the above-described embodiment, will not be repeated here.
In summary, Anti-dismantling pipe connection device provided in an embodiment of the present invention, during assembling, union nut and pipe joint locking Continue the twisting portion of twisting union nut afterwards, make the portion of twisting into two parts because can not bear it is larger screw torque be broken, ensure pipe joint With the non-dismountable property of union nut, avoid because dismounting causes coolant leakage by mistake, simple in construction, easy to operate, processing and installation Cost is low；The locking torque that portion can be twisted into two parts is controlled between packing torque and peak torque, prevents coolant 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 the welding position being located away between pipe joint and adapter, To the influence of welding position during so as to avoid twisting into two parts, avoid causing the destruction of welding position leakage during fracture；Due to wall thickness Positioned at portion middle can be twisted into two parts at minimum, facilitate in process using slide calliper rule to carrying out dimensional check at wall thickness minimum, simultaneously Fracture is occurred at the wall thickness minimum that can be twisted into two parts among portion, and the destruction of second connecting portion is caused and let out when avoiding fracture Leakage.
In description of the invention, it is to be understood that the orientation or position relationship of the instruction such as term " on ", " under " be based on Orientation shown in the drawings or position relationship, it is for only for ease of description description of the invention and simplified, rather than instruction or hint institute The device or unit of finger must have specific direction, with specific azimuth configuration and operation, it is thus impossible to be interpreted as to this hair Bright limitation.
In the description of the invention, unless otherwise clearly defined and limited, term " connected ", " connection ", " fixation " etc. It all should be interpreted broadly, for example, " connection " can be fixedly connected or be detachably connected, or be integrally connected, or electricity Connection；Can be joined directly together, can also be indirectly connected by intermediary.For the ordinary skill in the art, The concrete meaning of above-mentioned term in the present invention 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 to combine at least one reality that specific features, structure, material or the feature that the embodiment or example describe are contained in the present invention Apply in example or example.In this manual, identical embodiment or reality are not necessarily referring to the schematic representation of above-mentioned term Example.Moreover, description specific features, structure, material or feature can in any one or more embodiments or example with Suitable mode combines.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made, Equivalent substitution, improvement etc., should be included in the scope of the protection.

Claims (10)

  1. A kind of 1. Anti-dismantling pipe connection device, it is characterised in that including：
    Pipe joint；With
    Union nut, the union nut have including the first connecting portion for being connected with the pipe joint, for being connected The second connecting portion of bell-mouthed first adapter, for the twisting portion that screws for instrument and be connected to the second connecting portion and Portion is twisted into two parts between the twisting portion；
    Wherein, the wall thickness for twisting into two parts portion is gradually reduced from its both ends to middle part vertically, enables described to twist into two parts portion and exist In the middle part forced breakage for twisting into two parts portion, the first connecting portion and institute after the pipe joint and union nut locking The outer surface for stating second connecting portion is the face of cylinder.
  2. 2. Anti-dismantling pipe connection device according to claim 1, it is characterised in that
    Be connected with the second connecting portion wall thickness of one end of portion of twisting into two parts is less than the wall thickness of the second connecting portion, and institute State can twist into two parts portion be connected with the twisting portion one end wall thickness be less than the twisting portion wall thickness.
  3. 3. Anti-dismantling pipe connection device according to claim 1, it is characterised in that
    The wall thickness for twisting into two parts portion V-shaped change vertically, it is double round table surfaces to make the outer surface that can twist into two parts portion.
  4. 4. Anti-dismantling pipe connection device according to claim 1, it is characterised 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. 5. Anti-dismantling pipe connection device according to claim 1, it is characterised in that
    Cross that the side of the vertical section for twisting into two parts portion's axis is V-shaped, two oblique line sections of the V-arrangement side are twisted into two parts with described The angle of portion's axis is respectively less than 20 degree.
  6. 6. Anti-dismantling pipe connection device according to claim 1, it is characterised in that
    The length for twisting into two parts portion is in the range of 3mm~5mm.
  7. 7. Anti-dismantling pipe connection device according to claim 1, it is characterised in that
    The 3rd connecting portion that the pipe joint includes coordinating with the first connecting portion, it is connected to the 3rd connecting portion end and uses The tapered portion coordinated and the 4th connecting portion for being connected the second adapter are abutted in the horn mouth with the described first adapter.
  8. 8. Anti-dismantling pipe connection device according to claim 7, it is characterised in that
    3rd 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 joint have axially through the second pilot hole, second adapter inserts the second dress of 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, and the outer surface in the twisting portion is prismatic surface.
  9. 9. Anti-dismantling pipe connection device according to any one of claim 1 to 8, it is characterised in that
    In packing torque M1The lower the maximum shear stress τ that can twist into two parts portion1For：
    <mrow> <msub> <mi>&amp;tau;</mi> <mn>1</mn> </msub> <mo>=</mo> <mfrac> <mrow> <mn>16</mn> <msub> <mi>M</mi> <mn>1</mn> </msub> </mrow> <mrow> <mi>&amp;pi;</mi> <msup> <mrow> <mo>(</mo> <mi>d</mi> <mo>+</mo> <mn>2</mn> <mi>t</mi> <mo>)</mo> </mrow> <mn>3</mn> </msup> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <msup> <mi>&amp;alpha;</mi> <mn>4</mn> </msup> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>,</mo> <mi>&amp;alpha;</mi> <mo>=</mo> <mfrac> <mi>d</mi> <mrow> <mi>d</mi> <mo>+</mo> <mn>2</mn> <mi>t</mi> </mrow> </mfrac> </mrow>
    In peak torque M2The lower the maximum shear stress τ that can twist into two parts portion2For：
    <mrow> <msub> <mi>&amp;tau;</mi> <mn>2</mn> </msub> <mo>=</mo> <mfrac> <mrow> <mn>16</mn> <msub> <mi>M</mi> <mn>2</mn> </msub> </mrow> <mrow> <mi>&amp;pi;</mi> <msup> <mrow> <mo>(</mo> <mi>d</mi> <mo>+</mo> <mn>2</mn> <mi>t</mi> <mo>)</mo> </mrow> <mn>3</mn> </msup> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <msup> <mi>&amp;alpha;</mi> <mn>4</mn> </msup> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>,</mo> <mi>&amp;alpha;</mi> <mo>=</mo> <mfrac> <mi>d</mi> <mrow> <mi>d</mi> <mo>+</mo> <mn>2</mn> <mi>t</mi> </mrow> </mfrac> </mrow>
    The τ in the case of outer surface for twisting into two parts portion is non-porous sealing surface1And τ2Meet：
    <mrow> <msub> <mi>&amp;tau;</mi> <mn>1</mn> </msub> <mo>&amp;le;</mo> <mfrac> <mn>1</mn> <msqrt> <mn>3</mn> </msqrt> </mfrac> <msub> <mi>&amp;sigma;</mi> <mi>b</mi> </msub> <mo>&amp;le;</mo> <msub> <mi>&amp;tau;</mi> <mn>2</mn> </msub> </mrow>
    Wherein, t is the thickness at the wall thickness minimum that can twist into two parts portion, and d can twist into two parts the internal diameter in portion, σ for described inbTwisted to be described The tensile strength in disconnected portion.
  10. A kind of 10. air conditioner, it is characterised in that including：
    Outdoor unit；With
    Indoor set, the first adapter of cooling matchmaker circulation is connected with one in the outdoor unit and the indoor set, another On be connected with cooling matchmaker circulation second adapter, it is described first adapter it is described second adapter between pass through such as claim 1 to 9 Any one of Anti-dismantling pipe connection device be connected.
CN201711217468.6A 2017-11-28 2017-11-28 Anti-dismantling pipe connection device and air conditioner Pending CN107883083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711217468.6A CN107883083A (en) 2017-11-28 2017-11-28 Anti-dismantling pipe connection device and air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711217468.6A CN107883083A (en) 2017-11-28 2017-11-28 Anti-dismantling pipe connection device and air conditioner

Publications (1)

Publication Number Publication Date
CN107883083A true CN107883083A (en) 2018-04-06

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WO2022068019A1 (en) * 2020-09-30 2022-04-07 广州市凯捷电源实业有限公司 Nut

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US4037515A (en) * 1976-08-26 1977-07-26 Kesselman David A Tamper resistant fastener
WO2011007052A1 (en) * 2009-07-17 2011-01-20 Ensto Finland Oy Nut for a moment screw
CN202431724U (en) * 2012-01-05 2012-09-12 广西玉柴机器股份有限公司 Anti-dismounting nut
CN202629376U (en) * 2012-06-08 2012-12-26 珠海格力电器股份有限公司 Adapter pipe nut, pipe joint assembly and air conditioner
CN204175756U (en) * 2014-10-13 2015-02-25 许嘉哲 Nut
CN205402006U (en) * 2015-12-17 2016-07-27 Tcl空调器(中山)有限公司 Anti -disassembly connects and subassembly thereof
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Application publication date: 20180406