WO2015117274A1 - 一种专用于分体式空调制冷剂连接管路的连接螺母 - Google Patents

一种专用于分体式空调制冷剂连接管路的连接螺母 Download PDF

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Publication number
WO2015117274A1
WO2015117274A1 PCT/CN2014/071909 CN2014071909W WO2015117274A1 WO 2015117274 A1 WO2015117274 A1 WO 2015117274A1 CN 2014071909 W CN2014071909 W CN 2014071909W WO 2015117274 A1 WO2015117274 A1 WO 2015117274A1
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Prior art keywords
nut
connection
joint
connecting pipe
screw nut
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PCT/CN2014/071909
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English (en)
French (fr)
Inventor
孙海潮
Original Assignee
孙海潮
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Application filed by 孙海潮 filed Critical 孙海潮
Priority to PCT/CN2014/071909 priority Critical patent/WO2015117274A1/zh
Publication of WO2015117274A1 publication Critical patent/WO2015117274A1/zh

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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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
    • F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall

Definitions

  • the present invention belongs to the technical field of air conditioners, and relates to only a connecting nut of an air-conditioning refrigerant connecting pipe, and particularly relates to a connecting nut dedicated to a refrigerant connecting pipe between a split type air conditioner indoor unit and an outdoor unit.
  • the currently known split type air conditioner connects a refrigerant pipe to a circulation circuit by connecting two refrigerant connecting pipes to a joint on an outdoor unit and an outdoor unit.
  • the two refrigerant connecting pipes for connecting indoor and outdoor machines are generally copper pipes.
  • copper-aluminum welded pipes, copper-aluminum composite pipes, aluminum pipes and steel pipes are used as connecting pipes for indoor and outdoor machines.
  • no matter which kind of metal pipe is used, the most common connection method with the indoor unit and the outdoor unit is the flared connection.
  • the tube port is inserted into the connecting nut, and then the tube port is expanded into a bell mouth, and the connecting nut is connected with the indoor and outdoor machine joint, and the bell mouth is pressed by the inner cone hole of the nut at the bottom of the nut to the outer frustum of the joint.
  • the sealing connection is formed on the upper part, and the connecting pipe is sealed by the bell mouth of the connecting pipe, and the bell mouth of the connecting pipe is clamped between the taper hole of the nut and the outer frustum of the joint, and the inner taper hole of the nut has no direct contact with the outer frustum of the joint. This is a technical feature of the flared port connection.
  • the flared port connection method has a high connection requirement for the flared port, the connecting pipe material, and the magnitude of the applied torque when the connecting nut is connected. If it is slightly improper, the sealing connection may be lost. Even the ideal installation connection can not meet the sealing requirements of higher pressure systems. In general, improper connection or long time is prone to leakage. In fact, split air conditioners often leak a certain amount of refrigerant every year. It needs to be replenished regularly, otherwise the cooling capacity will continue to drop, which is caused by the characteristics of the connection structure, especially the development and application of new refrigerant systems in recent years, such as R410a, R32, R290 refrigerant system, etc.
  • the technical requirements of the R410a and R32 refrigerant systems are higher in the technical requirements of the bell mouth and the pressure resistance.
  • the R290 refrigerant system clearly stipulates that the detachable flare connection is not available. use. Therefore, the original flare connection method can not meet the high sealing requirements of new refrigerant systems such as R410a, R32 and R290.
  • the connecting pipe connected with the flared bell needs to pass through the nut sleeve in the hole of the nut light wall sleeve. After the connection, there is a nut sleeve hole gap between the pipe itself and the nut light wall sleeve hole, so the joint portion of the bell mouth and the connecting pipe is the bell mouth.
  • the opening and closing of the opening is directly in direct communication with the outside world.
  • the bellows opening and closing is always in the outside atmosphere. It is polluted by the dirty air in the atmosphere and various sewage.
  • the condensation at the connection of the connecting pipe is condensed. Condensed water will penetrate into the bell mouth through the gap, causing corrosion.
  • the flare opening of the bell will leak due to corrosion cracking, especially when the joint and the connecting pipe are connected by different metals.
  • electrochemical corrosion damage especially the corrosion destructiveness.
  • the copper joint is directly in contact with the bell mouth of the aluminum connecting tube, and the electricity between the copper and aluminum After the chemical corrosion is connected, it always exists.
  • the bell mouth is the most easily broken and leaked due to electrochemical corrosion. Therefore, the connection of the flared port
  • the type is not directly applicable to the connection of copper joints and aluminum connecting pipes. This is why copper-aluminum bridges have appeared in recent years, that is, most of them are aluminum tubes in the middle, but they have to be connected with a small copper tube at both ends. Keep the copper tube inserted into the nut, flare the bell, and connect with the copper connector. In addition, the pipe is always in a state of vibration when it is connected.
  • the pipe itself may also be shaken loose due to the disturbance of the external environment. Because there is a gap between the pipe itself and the nut sleeve hole after the connection, the nut is usually sleeved in the nut. The length of the light wall of the nut is only about 3mm, so the gap is short and connected to the bellows of the connecting pipe. Any vibration or wobble caused by the connecting pipe will be transmitted to the flare opening of the bell without any attenuation. These factors are intensified. The rupture of the flared opening of the bell mouth causes leakage. If the time is long, the nut will be loose and loose. When the nut is loose and loose, the bell mouth seal will leak due to the reduction of the pressing force. In addition, the flare is expanded.
  • connection only creates a sealing capability at the flare, which is a single-sealed connection. Once the flare seal creates a leak, it means that the connecting fitting loses its sealing ability. Therefore, it is a long-awaited search for a connection nut with higher sealing performance, more reliable sealing performance, superior corrosion resistance, anti-vibration and anti-loose performance, which can be directly used for pipe connection between dissimilar metals without electrochemical corrosion. The technical problem solved. Summary of the invention
  • the object of the present invention is precisely for the above-mentioned problem of the connection mode of the flare connection of the refrigerant pipe.
  • a specially provided air conditioner indoor unit is connected with the outdoor unit refrigerant.
  • the connecting nut of the pipeline completely solves the problems existing in the above-mentioned flare connection method: that is, the connection sealing performance is low, the sealing reliability is poor, the corrosion resistance is not prevented, the anti-vibration and the anti-loose property are low, and it cannot be directly used for the dissimilar metal pipeline The problem with the connection.
  • the object of the present invention is achieved by the following means: a connecting nut dedicated to a split type air conditioner refrigerant connecting pipe, including a joint, an outer frustum on the joint, a nut inner taper hole and a connecting pipe flare
  • the utility model is characterized in that: the inner cone hole of the nut is provided with a horn groove, and the outer cone of the joint squeezes the inner cone hole of the nut to realize a hard metal seal between the outer frustum of the joint and the inner taper hole of the nut, and the bell mouth of the connecting pipe is pressed A horn groove seal is formed between the outer frustum of the joint and the horn groove on the inner taper hole of the nut
  • the object of the invention can also be achieved in such a way that:
  • the nut light wall hole length is greater than 6mm.
  • a speaker slot is formed in the inner cone hole of the nut, the speaker slot only occupies a part of the inner cone hole of the nut, and the inner cone hole of the remaining part of the nut still exists.
  • the outer cone of the joint squeezes the bell mouth, the bell mouth is pressed against the horn.
  • the groove of the connecting pipe is squeezed by the horn groove between the outer frustum of the joint and the horn groove on the inner taper hole of the nut, the outer frustum of the joint is squeezed to the inner tapered hole of the nut of the joint to realize the joint.
  • the metal fringe between the outer frustum and the inner taper hole of the taper sleeve, the bell groove seal and the metal hard seal constitute a double seal, and compared with the original single-sealed connection connected with the horn, an additional layer of sealing guarantee is provided, Seal reliability.
  • the flared port connection is applied to the connection of the thin-walled, soft-connected connecting pipe, and the pressure-bearing capacity of the bellows expanded by the connecting pipe becomes weaker due to the flare deformation, which is also a lower pressure bearing capacity of the bell mouth seal.
  • the main reason is that the material of the outer cone and the taper of the taper sleeve is harder and the pressure bearing capacity is stronger, so that the sealing performance of the metal hard seal between the outer frustum of the joint and the inner taper of the taper sleeve is much higher than that of the horn.
  • the mouth seal so that the sealing ability of the bell groove seal and the metal hard seal to form a double seal is greatly improved Under normal circumstances, it can reach more than 20MPa, far exceeding the sealing pressure bearing capacity of the original flared port connection.
  • the space of the speaker slot is fixed.
  • the bell mouth is placed in the speaker slot with a fixed space. When the seal is sealed, the soft bellows expansion space is confined in the space of the speaker slot.
  • the depth of the horn of the present invention should be close to the wall thickness of the connecting pipe.
  • the length of the horn is more than 1 mm, it is better to occupy two-thirds of the length of the tapered taper of the corresponding nut.
  • the length depends on the length of the horn on the inner cone of the corresponding nut so that the horn is completely placed in the horn.
  • the quality of the connecting pipe is softer than that of the outer frustum of the joint and the inner tapered hole of the nut.
  • the flare becomes smaller due to the flare, and becomes softer and deforms easily during extrusion.
  • it is recommended to design the horn depth to The bell mouth is placed in the speaker slot and protrudes from the speaker slot by 0.1 to 0.4 mm, which is preferable.
  • the first sealing effect is the flared groove seal, followed by the simultaneous sealing of the metal hard seal and the bell groove seal to ensure optimum results for each seal.
  • connecting it is also possible to adjust the hardness of the extrusion deformation between the metal hard seal and the bell groove seal to achieve a more ideal seal.
  • the connecting pipe is first sheathed in the nut, and there is a through hole gap between the connecting pipe and the nut light wall hole, and the metal anaerobic adhesive is applied between the nut light wall hole and the connecting pipe.
  • the sealing, the isolation of the bell mouth seal and the metal hard seal are connected with the outside world, completely eliminating the influence of external moisture, sewage, condensed water and vibration on the flare opening of the bell mouth.
  • the necessary condition for electrochemical corrosion is to be wet. In the air and water, the connection with the outside world is isolated, and the occurrence of electrochemical corrosion loses the necessary conditions, which completely eliminates the problem of electrochemical corrosion when the joint is connected with the dissimilar metal connecting pipe.
  • the length of the light wall hole of the nut is determined by the connection seal required in actual use.
  • the gap between the light wall hole of the nut and the connecting pipe is sealed by the metal anaerobic glue, and the metal anaerobic adhesive provides a strong anti-disassembly torque to the light wall hole of the nut, and the anti-disassembly torque provided can be passed.
  • the length of the light-wall hole of the lengthening nut is increased to be large enough to meet the anti-disassembly requirements of some special sealing connections. At the same time, it can effectively reduce the vibration and shock absorption. It should be more than 6mm to ensure the sealing effect and anti-vibration effect of metal anaerobic adhesive on the gap.
  • connection nut of the existing split type air conditioner refrigerant connecting pipe In the invention, except that the speaker groove and the nut light wall hole length on the inner cone hole of the nut need to be more than 6 mm, the remaining structure is completely the same as the connection nut of the existing split type air conditioner refrigerant connecting pipe, and thus the prior art
  • the connecting nut is fully interchangeable.
  • the connecting nut of the invention can be made of metal materials such as stainless steel, alloy steel, copper, aluminum, etc., and the invention is applied when the joint and the connecting pipe are connected by a heterogeneous material, the nut should be made of stainless steel, and the stainless steel is Inactive materials, the electrochemical reaction between the connection with dissimilar metals is extremely weak and almost negligible.
  • the invention can put a sealing ring between the external thread of the joint and the outer frustum of the joint, and the pressure-squeezing of the sealing ring here can further improve the sealing performance of the sealing of the connecting pipeline, and At the same time, the sealing ring is compressed in its corresponding position to produce an elastic force, effectively providing a torque that prevents the connection from loosening.
  • the invention can apply a metal anaerobic adhesive to the joint of the joint and the nut to provide a high anti-disassembly torque for the connection, so that the connection has a more reliable anti-connection loosening ability, and at the same time can also play a sealing role.
  • the added anti-disassembly torque is several times more than the threaded connection between the nut and the joint. Under normal circumstances, it is almost impossible to disassemble, thus becoming suitable for application on the R290 refrigerant system requiring non-removable connecting pipe connection. may.
  • the double seal design of the metal hard seal and the bell groove seal of the invention, together with the sealing ring and the auxiliary seal of the metal anaerobic glue, the four seals provide far more than the original flared joint connection sealing ability, and both will be
  • the connection provides anti-disassembly torque and vibration damping.
  • the detachment resistance provided is sufficient to meet the detachment requirements of the R290 refrigerant system for connection.
  • the present invention has the following main features:
  • the invention can realize a sealed connection with a pressure exceeding 20 MPa under the condition that the connection process, the connection requirement and the connection cost are connected to the flared port.
  • the invention can apply a maximum torque spiral connection within the nut and joint thread bearing capacity, which makes the connection installation convenient, easy and reliable, and the one-time connection success rate is greatly improved.
  • connection sealing portion of the invention is completely isolated from the outside, and can be applied to the connection of the connecting pipe and the joint to the dissimilar metal without electrochemical corrosion, thereby replacing the high cost connecting pipe for the low cost connecting pipe. It is possible to meet the working conditions of new refrigerant systems such as R410a, R32 and R290.
  • the present invention is a double-sealed connection, and the isolation between the double seal and the connecting seal portion from the outside makes the connection anti-vibration and anti-loose performance greatly increased, and the connection reliability is greatly improved.
  • the invention has complete interchangeability with the connecting nut on the existing air conditioner, and can replace the existing connecting nut without changing the existing joint structure.
  • FIG. 1 is a schematic view of a connection structure of the present invention.
  • FIG. 2 is a schematic structural view of a coupling nut of the present invention.
  • Attachment 1 is the joint
  • 2 is the threaded connection
  • 3 is the nut
  • 4 the inner cone of the nut
  • 5 is the metal hard seal
  • 6 is the bell mouth and the bell groove seal
  • 7 is the bell mouth
  • 8 is the joint outer frustum and the bell mouth seal 9 is the flare opening of the bell mouth
  • 10 is the gap between the nut and the connecting pipe
  • 1 1 is the connecting pipe
  • 12 is the screw threaded hole
  • 13 is the speaker groove
  • 14 is the nut light wall hole.
  • FIG. 1 is a schematic view of a connection structure of the present invention.
  • Fig. 1, 1 is a joint
  • Fig. 1, 3 is a nut of the present invention
  • a connecting nut 3 is fitted on the connecting pipe 1 1
  • a bell mouth 7 is expanded at a connecting pipe end
  • a connecting pipe is abutted against the bell mouth 7 1 1
  • Apply metal anaerobic adhesive on the outer wall, the length of the glue is equivalent to the nut wall
  • the connecting pipe 1 is lightly pulled, and the bell mouth 7 is pulled into the speaker groove 13 placed on the inner taper hole 4 of the nut and as close as possible, and the connecting nut 3 needs to be rotated left and right during the light pulling process.
  • the metal anaerobic adhesive applied on the outer wall of the connecting pipe 1 1 is evenly distributed in the connecting pipe gap 10 of the nut light wall hole 14 and the connecting pipe 1 1 , and then the nut threaded hole 12 on the connecting nut 3 is threadedly connected 2 It is screwed to the external thread on the joint 1 until the hand feels tight. Finally, a torque is applied to the nut 3 by the wrench until the nut 3 is screwed, and the connection is completed.
  • the invention can be used with the seal ring and the metal anaerobic adhesive. It is used on connections that require higher sealing and anti-looseness.
  • the method of use is to apply a metal anaerobic adhesive outside the threaded connection and a sealing ring between the external thread of the joint and the outer frustum of the joint, and the remaining joining methods are the same as the above-mentioned embodiment.
  • the sealing ring and the metal anaerobic adhesive are added, which can further seal and hold the loosening action, and can also isolate the bell mouth from the bell mouth to prevent it from being corroded, reduce the vibration influence and improve The role of expanding the disassembly torque.
  • the present invention recommends a hydrogenated nitrile rubber sealing ring and a 554 metal anaerobic adhesive which are resistant to the refrigerant system.
  • the metal hard seal 5 is a squeeze seal between the outer frustum of the joint and the inner taper hole 4 of the nut
  • 8 is a squeeze seal between the outer frustum of the joint and the bell mouth
  • 6 is a seal between the bell mouth and the bell groove. 8 and 6 form a bell groove seal.
  • 2 is a schematic structural view of the connecting nut of the present invention, wherein 4 is a tapered inner hole of the nut, and the horn 13 is formed on the inner tapered hole 4 of the nut.
  • the diameter of the nut light wall hole 14 only needs to be slightly larger than the outer diameter of the connecting pipe 1 1 , as long as it can fit into the connecting pipe 1 1 , it is recommended that the difference between the two is controlled within 0.1 mm, so that the metal anaerobic rubber seal
  • the nut 10 and the connecting tube gap 10 achieve the most ideal effect.
  • the air conditioner of the present invention is an air conditioner including equipment for energy transfer adjustment of air through a refrigerant system, including a home air conditioner, a central air conditioner, an automobile air conditioner, a heat pump water heater, and the like.

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

Abstract

一种专用于分体式空调制冷剂连接管路的连接螺母（3），包括接头（1），接头（1）上的外锥台，螺母内锥孔（4）和连接管喇叭口（7），其特征是：螺母内锥孔（4）上设有喇叭槽（13），接头外锥台挤压螺母内锥孔（4）实现接头外锥台与螺母内锥孔（4）之间的金属硬密封（5），连接管喇叭口（7）被挤压于接头外锥台和螺母内锥孔（4）上的喇叭槽（13）之间实现喇叭槽（13）密封。该连接螺母（3）可用于所有制冷剂系统的高密封性和可用于异种材质的连接管的连接上，具有与现有技术的连接螺母完全互换的特点。

Description

一种专用于分体式空调制冷剂连接管路的连接螺母
技术领域
[0001]本发明属于空调技术领域， 仅涉及一种空调制冷剂连接管路的连接螺母,特别是仅涉及一种专用于分体式空调室 内机与室外机制冷剂连接管路的连接螺母。
背景技术
[0002] 目前已知的分体式空调是通过两条制冷剂连接管连接室内机与室外机上的接头将制冷剂管路连接成一条循环回 路的。 现有技术中用于连接室内外机的这两条制冷剂连接管一般为铜管,近年来也有采用铜铝焊接管,铜铝复合管， 铝管 ， 钢管作为室内外机的连接管路,但无论釆用的是哪一种金属管,其与室内机和室外机的最常用的连接方法均为扩喇叭口 连接。 扩喇叭口连接是将管端口套进连接螺母， 然后将管端口扩成喇叭口，通过连接螺母与室内外机接头连接,由螺母底 部的螺母内锥孔将喇叭口挤压在接头外锥台上形成密封连接,连接时挤压密封的是连接管喇叭口， 连接管喇叭口被夹持 在螺母内锥孔与接头外锥台之间， 螺母内锥孔与接头外锥台无直接接触， 这是扩喇叭口连接的技术特征。 扩喇叭口连接 方式对扩喇叭口， 连接管材料， 连接螺母连接时施加力矩大小的掌握等连接要求较高，稍有不当， 就会造成密封连接失 败。 即便是理想的安装连接， 也不能满足更高压力系统的密封性要求， 一般情况下， 连接不当或便用时间长了易产生泄 漏,事实上,分体式空调往往每年都会泄漏一定量的制冷剂,需定期补充,否则制冷能力会不断下降,正是该种连接结构上的 特点造成的,特别是近年来新的制冷剂系统的开发应用， 如 R410a,R32,R290制冷剂系统等， 对密封性要求更高 , R410a, R32制冷剂系统的技术条例中就对喇叭口的工艺制作， 耐压性能作了更高要求， R290制冷剂系统则明确规 定了可拆卸式的扩喇叭口连接方式不可使用。 因此， 原有的扩喇叭口连接方式已经不能满足 R410a,R32,R290等新的 制冷剂系统的高密封要求了。 扩喇叭口连接的连接管需要穿过螺母套在螺母光壁套孔中， 连接后管子本身与螺母光壁套 孔之间有螺母套孔间隙， 因而喇叭口与连接管的结合部即喇叭口拆弯口实际上与外界是直接相通的， 喇叭口拆弯口时刻 处于外界大气之中， 受着大气中污浊空气， 各种污水的侵蚀， 空调工作时， 连接管连接处凝积冷凝水， 冷凝水就会通过 间隙渗透到喇叭口拆弯口， 造成腐蚀， 天长日久， 腐蚀到了一定程度时， 喇叭口拆弯口会因腐蚀破裂而产生泄漏， 特别 对于接头与连接管为异种金属间连接时， 又多了一种电化学腐蚀破坏， 腐蚀破坏性尤为明显， 如在铜接头与铝连接管的 扩喇叭口连接中， 铜接头与铝连接管喇叭口直接压接接触， 铜铝间的电化学腐蚀连接后就始终存在着， 喇叭口拆弯口则 最容易因电化学腐蚀而破裂泄漏， 因此， 扩喇叭口的连接方式是不可直接应用于铜接头与铝连接管的连接上了， 这就是 近年来为什么会出现一种铜铝煌接管， 即中间大部分为铝管， 但不得不两头煌接一小段铜管， 保留铜管套进螺母， 扩喇 叭口， 与铜接头连接的原因。 此外管子连接工作时总是处于一定的振动的状态， 管子本身也会因外界环境的千扰产生摇 晃松动的可能， 由于连接后管子本身与螺母套孔之间有间隙， 通常螺母中套接连接管的螺母光壁孔长仅为 3mm左右 ， 因此此间隙短且与连接管喇叭口拆弯口相连， 任何引起连接管的振动， 摇晃都会几乎无衰减地传递到喇叭口拆弯口上 ， 这些因素加剧了喇叭口拆弯口的破裂而产生泄漏， 时间长了也会引起螺母疲劳松动， 当螺母发生疲劳松动时， 喇叭口 密封处会因挤压力的减小而产生泄漏， 此外， 扩喇叭口连接仅在喇叭口处产生密封能力， 为单密封连接， 一旦喇叭口密 封产生泄漏， 就意味着连接管件失去密封能力。 因此， 寻找一种连接密封性能更高， 密封性能更可靠， 防腐蚀防振防松 动性能优越， 可直接用于异种金属间管路连接而无电化学腐蚀的连接螺母,就成了人们一直渴望解决的技术难题了。 发明内容
[0003]本发明的目的正是针对上述制冷剂管路扩喇叭口连接的连接方式存在的问题， 在扩喇叭口连接的基础上， 而专 门提供的一种空调室内机与室外机制冷剂连接管路的连接螺母， 彻底解决了上述扩喇叭口连接方法存在的问题： 即连接 密封性能较低， 密封可靠性差， 不防腐蚀， 防振防松动性低， 不可直接用于异种金属间管路连接的问题。
[0004]本发明的目的是通过以下方式来实现的： 一种专用于分体式空调制冷剂连接管路的连接螺母， 包括接头，接头上 的外锥台， 螺母内锥孔和连接管喇叭口， 其特征是： 螺母内锥孔上设有喇叭槽， 接头外锥台挤压螺母内锥孔实现接头外 锥台与螺母内锥孔之间的金属硬密封， 连接管喇叭口被挤压于接头外锥台和螺母内锥孔上的喇叭槽之间实现喇叭槽密封
[0005]本发明的目的还可以通过这样的方式来实现：
1 ,螺母光壁孔与连接管之间施涂金属厌氧胶。
[0006] 2,螺母光壁孔长度大于 6mm。
[0007]在螺母内锥孔上开设喇叭槽， 喇叭槽仅占去了螺母内锥孔一部分， 余下部分螺母内锥孔依然存在， 当接头外锥 台挤压喇叭口将喇叭口挤压于喇叭槽实行连接管喇叭口被挤压于接头外锥台和螺母内锥孔上的喇叭槽之间的喇叭槽密封 时， 接头外锥台就会挤压到余下部分的螺母内锥孔， 实现接头外锥台与锥套内锥孔之间的金属硬密封， 喇叭槽密封与金 属硬密封构成了双密封， 与原有的接喇叭连接的单密封连接相比较， 多了一层密封保障， 提高了密封可靠性。 通常扩喇 叭口连接应用在薄壁， 质地较软的连接管的连接上， 连接管扩成的喇叭口的承压能力因扩口变形变得更弱， 这也是喇叭 口密封承压能力较低的主要原因， 但接头外锥台与锥套内锥孔的材质较硬， 承压能力较强， 使得接头外锥台与锥套内锥 孔之间的金属硬密封的密封性能远高于喇叭口密封， 从而使得喇叭槽密封与金属硬密封构成双密封的密封能力大为提高 ， 通常情况下可达 20MPa以上,远超过原有扩喇叭口连接的密封承压能力。 喇叭槽的空间大小是一定的， 喇叭口被置于 空间大小固定的喇叭槽中， 在挤压密封时， 质地较软的喇叭口扩张空间就被局限在喇叭槽的空间中， 受力越大， 挤压变 形时被挤压得就越密实， 而不会出现原有扩喇叭口连接力矩过大压裂喇叭的现象， 从而提高了喇叭口密封的密封性能和 连接安装的可靠性。 本发明的喇叭槽的深度应与连接管壁厚相接近， 喇叭槽长度在确保超过 1mm以上的情况下， 以占 到相应螺母内锥孔锥斜面长度的三分之二为佳， 连接管喇叭口长度根据相应螺母内锥孔上的喇叭槽长度而定， 以便喇叭 口被完全置于喇叭槽中。 通常连接管质地比接头外锥台与螺母内锥孔材质软， 喇叭口因扩口而密度变小， 将变得更软 ， 挤压时易于变形， 本发明实施时建议将喇叭槽深度设计为喇叭口置于喇叭槽后凸出喇叭槽 0.1到 0.4mm高为佳， 这样
， 在密封连接时， 首先起密封作用的是喇叭槽密封， 然后是金属硬密封与喇叭槽密封的同步密封， 就可以确保每种密封 都能达到最佳效果。 连接时， 还可采用在金属硬密封和喇叭槽密封的密封处垫密封垫圈的办法调整相互间的挤压变形硬 度来达到更理想的密封。 在扩喇叭口连接时， 连接管要先穿套在螺母中， 连接管与螺母光壁孔之间存在套孔间隙,通过 在螺母光壁孔与连接管之间施涂金属厌氧胶对间隙封堵， 隔绝了喇叭口密封和金属硬密封与外界的相通， 彻底消除了外 界湿气， 污水， 冷凝水及振动对喇叭口拆弯口的影响， 电化学腐蚀发生的必要条件是要处于湿空气， 水之中， 隔绝了与 外界的相通， 电化学腐蚀的发生失去必要条件， 也就彻底消除了接头与异种金属连接管连接时会产生电化学腐蚀的问题 。 螺母光壁孔的长短， 实际运用时视连接密封需要而定。 螺母光壁孔与连接管的间隙通过金属厌氧胶密封， 封堵与外界 相通的同时， 金属厌氧胶会对螺母光壁孔提供一个强大的抗拆卸力矩， 所提供的抗拆卸力矩可通过调长螺母光壁孔的长 度而调大， 大到足以满足一些特殊密封连接的防拆卸要求为止,与此同时， 也能有效地起到减振减震的作用， 实施时螺 母光壁孔长应大于 6mm以上， 以确保金属厌氧胶对间隙的封堵效果和防振作用。 本发明除在螺母内锥孔上设有喇叭槽 和螺母光壁孔长度需大于 6mm以上外， 其余结构与现有分体式空调制冷剂连接管路的连接螺母完全相同， 因而与现有 技术中连接螺母具有完全互换性。 本发明的连接螺母可采用不锈钢， 合金钢， 铜材， 铝材等金属材料制作， 将本发明应 用在接头与连接管为异质材料的连接时， 螺母则应以不锈钢材料为佳， 不锈钢为非活性材料， 与异种金属连接间的电化 学反应极弱， 几乎可以忽略不计。
[0008]本发明可在接头外螺紋与接头外锥台之间套上密封圈， 通过此处对密封圈压跨式挤压， 对连接管路的密封起到 进一步提高密封性能的作用， 与此同时， 密封圈在其相应位置上被压縮后会产生一个弹力作用， 有效地提供了阻止连接 松动的力矩。 本发明可在接头与螺母螺紋连接处， 施涂金属厌氧胶为连接提供极高的抗拆卸力矩， 使连接具有了更可靠 的防连接松动能力， 与此同时也能起到密封作用。 施涂金属厌氧胶， 增加的抗拆卸力矩是螺母与接头的螺紋连接的数倍 以上， 正常情况下几乎不可能拆卸， 从而为应用在要求不可拆卸的连接管连接的 R290制冷剂系统上成为可能。 本发明 的金属硬密封和喇叭槽密封的双密封设计， 加上密封圈， 金属厌氧胶的辅助密封， 这四种密封提供远超过原有的扩喇叭 口连接密封能力的同时， 均会为连接提供防拆卸力矩和减振作用。 所提供的防拆卸力矩足以满足 R290制冷剂系统对连 接方式的防拆卸要求。
[0009] 由于釆用了上述技术方案， 本发明具有如下主要特点：
1 ,本发明可在与扩喇叭口连接的连接工艺， 连接要求， 连接成本完全相同的情况下， 实现承压超过 20MPa以上的密封 连接。
[0010] 2,本发明在螺母和接头螺紋承受力范围内可以施加最大力矩的螺旋连接， 使得连接安装变得方便， 容易， 可靠 ，一次性连接成功率大为提高。
[001 1 ] 3,本发明连接密封部分与外界彻底隔离， 可应用在连接管与接头为异种金属的连接上而无电化学腐蚀的问题 ， 从而为低成本的连接管取代高成本的连接管成为可能， 足以满足 R410a,R32,R290等新的制冷剂系统的工况要求。
[0012] 4,本发明为双重密封连接， 双重密封和连接密封部分与外界的隔离使得连接防振防松动性能大增， 连接可靠性 大为提高。
[0013] 5,本发明与现有空调上的连接螺母有着完全的互换性， 可在不改变现有接头结构的前提下， 取代现有连接螺母 附图说明
[0014] 说明书附图 1是本发明的连接结构示意图。
[0015]说明书附图 2是本发明的连接螺母结构示意图。
具体实施方式
下面结合附图和实施例对本发明作进一步说明：
附中 1为接头， 2为螺紋连接， 3为螺母， 4螺母内锥孔， 5为金属硬密封， 6为喇叭口与喇叭槽密封， 7为喇叭口， 8为接 头外锥台与喇叭口密封， 9为喇叭口拆弯口， 10为螺母与连接管间隙， 1 1为连接管， 12为螺母螺紋孔， 13为喇叭槽 , 14为螺母光壁孔。
[0016]实施例： 图 1为本发明的连接结构示意图。 图 1中 1为接头， 图 1中 3为本发明螺母， 将连接螺母 3,套装在连接管 1 1上， 在连接管管端扩喇叭口 7， 然后在紧靠喇叭口 7起的连接管 1 1外壁上施涂金属厌氧胶， 涂胶长度相当于螺母光壁 孔 14的长度， 轻拉连接管 1 1,将喇叭口 7拉到置于螺母内锥孔 4上的喇叭槽 13内并尽可能地紧贴为止， 轻拉过程中需左右 旋转连接螺母 3， 使连接管 1 1外壁上施涂的金属厌氧胶均匀地分布在螺母光壁孔 14与连接管 1 1的连接管间隙 10中， 然 后将连接螺母 3上的螺母螺紋孔 12通过螺紋连接 2与接头 1上外螺紋螺旋连接， 直到手感拧不动为止， 最后通过扳手对螺 母 3施加力矩， 直到拧不动螺母 3为止， 连接完成， 本发明可配合密封圈和金属厌氧胶的使用， 应用于对密封和防松动要 求更高的连接上。 使用方法是， 在螺紋连接外施涂金属厌氧胶和在接头外螺紋与接头外锥台之间套上密封圈， 其余连接 方法与上述实施方法相同。 增加了密封圈和金属厌氧胶， 可以起到进一步密封和面持防松动作用， 也可以起到将喇叭口 连同喇叭口拆弯口与外界隔绝， 保持其不受侵蚀， 减轻振动影响和提高扩拆卸力矩的作用。 对于密封圈的材质和厌氧胶 的型号， 本发明推荐采用耐制冷剂系统的氢化丁晴橡胶密封圈和 554金属厌氧胶。 金属硬密封 5为接头外锥台与螺母内 锥孔 4之间的挤压密封， 8为接头外锥台与喇叭口之间的挤压密封， 6为喇叭口与喇叭槽之间的密封， 8与 6构成了喇叭槽 密封。 附图 2是本发明的连接螺母结构示意图， 其中 4为螺母内锥孔， 喇叭槽 13正是开设在螺母内锥孔 4上。 连接完成后 将接头 1 , 螺母 3， 连接管 1 1的连接结合部套上热缩套管加以对外界的进一步的隔绝保护， 对连接长期稳定的有效密封 效果显著。 螺母光壁孔 14的直径仅需略大于连接管 1 1外径， 只要能够满足套进连接管 1 1即可， 建议两者相差值控制在 0.1mm内为佳， 以使金属厌氧胶密封堵螺母与连接管间隙 10达到最理想的效果。
[0017]本发明的空调为空气调节器,包含通过制冷剂系统对空气进行能量转移调节的设备器件， 包括家用空调， 中央空 调， 汽车空调， 热泵热水器等。

Claims

1.一种专用于分体式空调制冷剂连接管路的连接螺母， 包括接头，接头上的外锥台， 螺母内锥孔和连接管喇叭口， 其特 征是： 螺母内锥孔上设有喇叭槽， 接头外锥台挤压螺母内锥孔实现接头外锥台与螺母内锥孔之间的金属硬密封， 连接管 喇叭口被挤压于接头外锥台和螺母内锥孔上的喇叭槽之间实现喇叭槽密封。
2.根据权利要求 1所述的制冷剂连接管路的连接螺母， 其特征是： 螺母光壁孔与连接管之间施涂金属厌氧胶。
3.根据权利要求 1所述的制冷剂连接管路的连接螺母，其特征是： 螺母光壁孔长度大 6mm。
PCT/CN2014/071909 2014-02-09 2014-02-09 一种专用于分体式空调制冷剂连接管路的连接螺母 WO2015117274A1 (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2413089A (en) * 1944-07-10 1946-12-24 Roy W Solomon Fitting
FR2465941A1 (fr) * 1979-09-21 1981-03-27 Clarion Co Ltd Joint evase
CN200972021Y (zh) * 2006-06-22 2007-11-07 讯凯国际股份有限公司 液冷装置以及其具有的导管及其管接头的总成
CN201014091Y (zh) * 2007-03-28 2008-01-30 珠海格力电器股份有限公司 空调内外机连接管的安装定位装置
CN201851810U (zh) * 2010-11-19 2011-06-01 汪莉莉 金属管道连接件
KR20130044802A (ko) * 2011-10-25 2013-05-03 김병문 냉매 연결배관 플래어 변형방지구조
CN103629456A (zh) * 2013-05-08 2014-03-12 孙海潮 一种专用于分体式空调制冷剂连接管路的连接螺母

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2413089A (en) * 1944-07-10 1946-12-24 Roy W Solomon Fitting
FR2465941A1 (fr) * 1979-09-21 1981-03-27 Clarion Co Ltd Joint evase
CN200972021Y (zh) * 2006-06-22 2007-11-07 讯凯国际股份有限公司 液冷装置以及其具有的导管及其管接头的总成
CN201014091Y (zh) * 2007-03-28 2008-01-30 珠海格力电器股份有限公司 空调内外机连接管的安装定位装置
CN201851810U (zh) * 2010-11-19 2011-06-01 汪莉莉 金属管道连接件
KR20130044802A (ko) * 2011-10-25 2013-05-03 김병문 냉매 연결배관 플래어 변형방지구조
CN103629456A (zh) * 2013-05-08 2014-03-12 孙海潮 一种专用于分体式空调制冷剂连接管路的连接螺母

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