CN104708164A - Connector and nitrogen filling welding connection device using same - Google Patents
Connector and nitrogen filling welding connection device using same Download PDFInfo
- Publication number
- CN104708164A CN104708164A CN201410819071.4A CN201410819071A CN104708164A CN 104708164 A CN104708164 A CN 104708164A CN 201410819071 A CN201410819071 A CN 201410819071A CN 104708164 A CN104708164 A CN 104708164A
- Authority
- CN
- China
- Prior art keywords
- gas outlet
- conical drogue
- elastic conical
- joint
- rigid pipe
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K5/00—Gas flame welding
- B23K5/22—Auxiliary equipment, e.g. backings, guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The invention provides a connector and a nitrogen filling welding connection device using the connector. The connector comprises an elastic conical sleeve with a small front end and a large rear end, wherein the elastic conical sleeve is provided with a connection structure used for being connected with an air outlet of an air source and an outer conical surface used for being connected with rigid pipes, annular grooves where the ends of rigid pipes of different pipe diameters are correspondingly inserted are formed in the outer conical surface of the elastic conical sleeve in the axial direction at intervals, and deformation areas in extrusion and interference fit with the rigid pipes are formed at the front side groove edges of the annular grooves and the conical surface parts adjacent to the front side groove edges. When the connector is connected, the rigid pipes are assembled in pace by being inserted into the corresponding annular grooves, the use requirements can be met, the clear assembly standard is provided, and the problem that the rigid pipes or the rubber conical sleeve is damaged as staff insert the rigid pipes excessively is avoided.
Description
Technical field
What the present invention relates to a kind of joint and use this joint fills nitrogen weld connection device.
Background technology
At present, middle-size and small-size freezer generally uses HCFC class or hydrogen fluorine hydrocarbon refrigerant (being commonly called as " freon "), pipeline many uses copper pipe of this cold storage refrigerating system.Connection pattern between copper pipe, between copper pipe with refrigeration accessory (magnetic valve, oil eliminator etc.) receive son connect and weld, be commonly welding when the caliber of copper pipe used is larger.Copper pipe welding generally uses gas welding, if gas welding process is directly carried out in atmosphere and do not have suitable welding protection measure, copper pipe is after welding completes, and the inner and outer wall near weld seam can produce a large amount of oxide skin.In the later stage that refrigeration system is installed, though can carry out " dirt is blown in segmentation " to blow out the oxide skin on part copper pipe inwall with high pressure drying nitrogen, most of oxide skin still can be attached to copper pipe inwall, is difficult to thoroughly remove.After refrigeration system puts into operation, the oxide skin being attached to copper pipe inwall cooled dose and lubricating oil " can be washed away " and slowly comes off from copper pipe inwall, flow in refrigeration systems with cold-producing medium and lubricating oil, the filter screen of larger oxide skin meeting blocking filter, rest on the small circulation position of refrigeration system component, trickle oxide skin chip is then blended in lubricating oil, reduce the greasy property of lubricating oil, the dirty of refrigeration system is blocked up, the system high-low pressure that the oil return valve of float-ball type oil eliminator is not closed completely and the causes fault such as to collaborate mostly is this reason and causes, in addition, its greasy property of compressor lubricant oil containing oxide skin declines greatly, thus cause the heel and toe wear of compressor, shorten the service life of compressor, even can cause the major accidents such as card cylinder.
For this problem, generally adopt inwall when filling nitrogen welding to prevent copper pipe from welding to produce oxide skin when the refrigeration systems such as freezer are installed, namely fill appropriate nitrogen in the inside of welding position and produce the effect of welding protection during welding.At present, fill when nitrogen is welded on operation and usually jointly completed by two operating personnel, one welder's primary responsibility welding by name, another support staff mainly carries out back work, as held up copper pipe, the copper piece such as three-way elbow, also want the main valve on switch nitrogen cylinder simultaneously, pressure-reducing valve on adjustment nitrogen cylinder, hold up the nitrogen pipeline etc. passed in copper pipe, the content of operation of this support staff is loaded down with trivial details, working strength is large, during particularly welding post and nitrogen cylinder distant, as welding post in high-altitude nitrogen cylinder in the situation on ground, support staff's workload of filling nitrogen welding is very large.Therefore, although the welding procedure of filling nitrogen welding must be adopted when mandatory requirement copper pipe welds in relevant code for erection and inspection, but the implementation status in practical engineering project allows of no optimist, lacking the practical nitrogen weld connection device that fills in this present situation and Refrigeration and Air-conditioning Engineering has certain relation.
Notification number is that the Chinese utility model patent of CN203509384 discloses a kind of air-conditioning welding tooling filling nitrogen instrument and have that this fills nitrogen instrument, this nitrogen instrument that fills is connected with inflation inlet by upper lower pliers head and spring, the gas-flow closure joint on upper grip head is utilized to be connected with inflation inlet and to pour nitrogen, although the labour intensity that nitrogen instrument also reduces workman is to a certain extent filled this, but this joint also needs to aim at air tube in use, it is also not very convenient to dock, simultaneously, this to fill nitrogen joint design comparatively complicated, is only applicable to the Small Refrigerating Equipments such as air-conditioning.
Notification number is that the Chinese utility model patent of CN203517104 discloses a kind of pipeline and suppresses quick change joint, the fittings body front end of this joint is provided with the rubber tapered sleeve of taper, rear end is connected with flexible pipe by clip, be connected with pipe by the cone rubber tapered sleeve of front end, structure is relatively simple, but, when this joint rubber tapered sleeve is connected with pipe, the part generation elastic deformation that rubber tapered sleeve is connected with pipe, an end face perpendicular to pipe elastic force backward can be produced to the end of pipe, when the gas pressure passed through in pipeline is larger, pipe is easy to depart from from rubber cone cover and cause Joint failure, simultaneously, because of the position that the grafting do not determined puts in place when this joint is that pipe connects, staff often imposes severe pressure to be connected firmly and puts slotting by pipe toward rubber cone, often have the problem that plug-in mounting is excessive, after a longer time of use, often damage is caused to the end of rubber tapered sleeve and pipe, the difference of size and different operating personnel exert oneself, the firmness of grafting has larger difference, affect the stability connected in use procedure.
Summary of the invention
The object of the present invention is to provide a kind of rigid pipe in use can the accurate joint that puts in place of grafting; Meanwhile, the present invention also provide a kind of use this joint fill nitrogen weld connection device.
Joint of the present invention adopts following technical scheme: a kind of joint, comprise the elastic conical drogue that little rear end, front end is large, described elastic conical drogue has the syndeton for being connected with the gas outlet of source of the gas and the male cone (strobilus masculinus) for being connected with rigid pipe, on the male cone (strobilus masculinus) of described elastic conical drogue, axially spaced-apart is provided with the annular groove of the end correspondence insertion for the rigid pipe of different tube diameters, and on front side of described annular groove, groove forms along place and front side groove the deformed region extruding interference fit with rigid pipe along contiguous tapered portion.
The center of described elastic conical drogue is provided with axially extended passage, and described is communicated with passage for the interface be connected with gas outlet.
The inner peripheral surface of described interface is provided with for preventing with gas outlet block the Stop structure that elastic conical drogue departs from from gas outlet.
Described Stop structure is the annular flange flange be located in interface.
The nitrogen weld connection device that fills of the present invention adopts following technical scheme: one fills nitrogen weld connection device, comprise the air delivery device be connected with source of the gas and the joint being connected to air delivery device gas outlet, described joint comprises the large elastic conical drogue in little rear end, front end, described elastic conical drogue has the syndeton for being connected with the gas outlet of source of the gas and the male cone (strobilus masculinus) for being connected with rigid pipe, on the male cone (strobilus masculinus) of described elastic conical drogue, axially spaced-apart is provided with the annular groove of the end correspondence insertion for the rigid pipe of different tube diameters, on front side of described annular groove, groove forms along place and front side groove the deformed region extruding interference fit with rigid pipe along contiguous tapered portion.
The center of described elastic conical drogue is provided with axially extended passage, and described is communicated with passage for the interface be connected with gas outlet.
The inner peripheral surface of described interface is provided with for preventing with gas outlet block the Stop structure that elastic conical drogue departs from from gas outlet.
Described Stop structure is the annular flange flange be located in interface.
Described air delivery device comprises branch chamber, and the end of described branch chamber is provided with the air inlet for being connected with source of the gas of metric system and/or English system, and described branch chamber is provided with identical gas outlet, two or more aperture.
Described air inlet is provided with stop valve.
On the male cone (strobilus masculinus) of the rubber tapered sleeve of joint of the present invention, axially spaced-apart is provided with the annular groove of the end correspondence insertion for the rigid pipe of different tube diameters, when rigid pipe is inserted in corresponding annular groove, the body being positioned at the cell wall place, front side of annular groove is deformed by rigid pipe extruding and produces radially outer pressure to rigid pipe, thus increase the static friction of rigid pipe and rubber tapered sleeve, prevent rigid pipe and rubber tapered sleeve from departing from, the end of rigid pipe is positioned at annular groove and does not overlap with rubber cone and contacts, the elastic force backward rigid pipe produced with the conical surface of rigid pipe end contact eliminating that rigid pipe front end and rubber cone in prior art overlap rubber tapered sleeve when contacting, simultaneously, the rigid pipe of the corresponding different tube diameters of annular groove difference that rubber cone puts, when connecting, rigid pipe is inserted in corresponding annular groove and is just seated, the requirement of use can be met, there is clear and definite assembling standard, the problem because the excessive plug-in mounting of staff causes rigid pipe or rubber tapered sleeve to damage can not be caused.
Further, the center of rubber tapered sleeve is provided with passage, the interface of rear end is connected with passage, the direct interface by rubber tapered sleeve is inserted on the gas outlet of source of the gas in use, namely male cone (strobilus masculinus) rigid pipe being inserted in rubber tapered sleeve completes connection, whole joint adopts elastomeric material that it can be made more convenient with the connection of gas outlet and rigid pipe, while rubber can not cause damage to gas outlet and rigid pipe due to its elasticity had.
Further, the projection with gas outlet locking is provided with in interface, and protruding employing annular flange flange structure, like this when elastic conical drogue is contained on gas outlet, the annular flange flange of interface can be pressed on gas outlet, increases the reliability of connection, simultaneously, annular flange flange also serves the effect of sealing ring, improves the air-tightness of connection.
Further, the nitrogen weld connection device that fills of the present invention also comprises branch chamber, branch chamber is provided with identical gas outlet, multiple aperture, because the aperture of gas outlet is identical, for also identical with the interface on the elastic conical drogue that gas outlet connects, increase versatility, namely any one rubber tapered sleeve can be inserted on any one gas outlet, applicability is stronger, improves operating efficiency.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation filling nitrogen weld connection device embodiment of the present invention;
Fig. 2 is the structural representation of plug embodiments one of the present invention;
Fig. 3 is the structural representation of joint when being connected with rigid pipe;
Fig. 4 is joint is connected when putting in place structural representation with rigid pipe;
Fig. 5 is the structural representation of plug;
Fig. 6 is the structural representation of plug embodiments two of the present invention.
Detailed description of the invention
A kind of embodiment of filling nitrogen weld connection device of the present invention: as shown in figures 1 to 6, comprise the air delivery device be connected with nitrogen cylinder and the joint being connected to position, air delivery device gas outlet, this air delivery device comprises branch chamber 4, the two ends, left and right of branch chamber 4 are respectively equipped with in use for the metric system air inlet 41 that is connected with source nitrogen and air inlet made in Great Britain 42, certainly, in other embodiments, branch chamber 4 can arrange the air inlet of any one standard in any one end.When not using, the metric system air inlet 41 at branch chamber 4 two ends and air inlet made in Great Britain 42 result in blockage to prevent dust or foreign material from entering respectively by plug 412 and 422 shutoff suitable with it, metric system air inlet 41 and air inlet made in Great Britain 42 are respectively equipped with stop valve 410,420, stop valve opens or closes to be communicated with or to disconnect branch chamber and source nitrogen for controlling air inlet, certainly, in other embodiments, stop valve can save, and the main valve directly by controlling nitrogen cylinder carrys out gauge tap.Branch chamber 4 is also provided with four gas outlets 431,432,433,434, four gas outlets are circular tube shaped and aperture is identical, and its outer peripheral face is provided with annular block groove.
On the gas outlet filling nitrogen weld connection device, correspondence is connected with four joints, and four joints comprise two joints made in Great Britain and two metric system joints, and certainly, in other embodiments, the quantity of joint and type can be arranged according to actual needs.The structure of plug embodiments one as shown in Figure 2, the elastic conical drogue 1 extended before and after comprising, this elastic conical drogue adopts the rubber of the certain high temperature of ability to make, the radial dimension of front end is less than the radial dimension of rear end, the rear and front end end face of elastic conical drogue 1 is the parallel surface perpendicular to axis, in use, the front opening of rigid pipe from the front end path of elastic conical drogue insert and with the cone match of elastic conical drogue, on male cone (strobilus masculinus) 100, axially spaced-apart is provided with multiple annular groove 101, the diameter compatible of each diameter of annular groove 101 position and a kind of rigid pipe of specification merges can make rigid pipe when being inserted to this position by elastic conical drogue swelling, the diameter of multiple annular grooves 101 position on elastic conical drogue male cone (strobilus masculinus) just can adapt to the rigid pipe of the different different size of multiple diameter, the center of elastic conical drogue 1 is provided with axially through passage 102, passage 102 rear end a part play interface effect and for being connected with the gas outlet in branch chamber 4, a front end part is used for air guide, the inner hole surface of passage 102 is provided with the Stop structure when assembling with gas outlet for coordinating with gas outlet block in the rear end of passage, this Stop structure is the annular flange flange 103 of evagination, when joint is connected on gas outlet, annular flange flange 103 coordinates with the annular block groove block on the outer peripheral face of gas outlet and prevents joint and gas outlet from departing from, in addition, when air-flow in branch chamber 4 is discharged by joint, the cooperation of annular flange flange 103 and annular block groove also can play certain sealing function.
Fill nitrogen weld connection device and also comprise the joint cap 3 suitable with elastic conical drogue, do not using or using in interval time filling the joint on nitrogen weld connection device, joint cap 3 joint is equipped with, can temporarily by tab closure by joint cap 3, prevent from entering in the passage of elastic conical drogue dust or dirty and block passage, simultaneously, joint cap can by the passage shutoff of the elastic conical drogue of joint, prevent the joint that nitrogen never uses when a part of gas outlet uses from spilling, the cone cylinder that joint cap 3 is closed for miner diameter end, when joint cap 3 is enclosed within elastic conical drogue, the blind end of joint cap 3 and the small end of elastic conical drogue are fitted and shutoff passage 102, the inner conical surface of joint cap 3 is provided with the block flange 300 of annular, block flange 300 coordinates with annular groove 101 block on elastic conical drogue male cone (strobilus masculinus) and prevents joint cap 3 from departing from from elastic conical drogue, certain sealing function is played in the cooperation of block flange 300 and annular groove 101 simultaneously.
Of the present inventionly fill nitrogen weld connection device in use, select metric system or air inlet made in Great Britain and be connected with nitrogen cylinder, the diameter of the rigid pipe welded as required selects suitable joint, joint cap on the joint needing to use is removed and is inserted on the elastic conical drogue of joint by rigid pipe, according to the annular groove on the elastic conical drogue that the diameter identification of rigid pipe is corresponding with it, and the end of rigid pipe is inserted in corresponding annular groove, as shown in Figure 4, now the end of rigid pipe is just positioned at annular groove, the conical surface of elastic conical drogue does not contact with the front end surface 200 of rigid pipe, also would not to rigid pipe generation elastic force backward, simultaneously, the front side cell wall of tube wall to annular groove of rigid pipe extrudes, form distortion position 120, the tube wall of the 120 pairs of rigid pipes in distortion position produces the elastic force perpendicular to the radial direction of tube wall, this elastic force makes the frictional force between rigid pipe and elastic conical drogue increase, thus prevent rigid pipe and elastic conical drogue from departing from, then the main valve on nitrogen cylinder is opened, open the stop valve filling nitrogen weld connection device branch chamber end, nitrogen to be entered in rigid pipe by the passage on branch chamber gas outlet and joint and is full of rigid pipe, oxygen barrier protection is carried out to the welding position of rigid pipe, thus prevent rigid pipe inwall from welding process, producing oxide-film, keep filling nitrogen until rigid pipe welding position reaches room temperature after welding completes, if this fills nitrogen welding operation after filling nitrogen welding in addition, close the stop valve of branch chamber end, and do not need all to go to close the main valve on nitrogen cylinder after filling nitrogen welding at every turn.If this does not fill nitrogen welding operation after filling nitrogen welding, then close the main valve on nitrogen cylinder after closing the stop valve of branch chamber end.
In the present embodiment, the air delivery device filling nitrogen weld connection device is branch chamber, in other embodiments, also can adopt other air delivering pipelines, and joint is connected to air delivering pipeline and metal tube link position place.
In the present embodiment, the center of elastic conical drogue is provided with passage, nitrogen is directly flowed out by the passage of elastic conical drogue, in other embodiments, the miner diameter end extending to elastic conical drogue directly can axially be run through in gas outlet, namely be directly enclosed within gas outlet by elastic conical drogue, nitrogen directly flows out from gas outlet.
In the present embodiment, the inner peripheral surface of interface is provided with Stop structure, prevents elastic conical drogue from departing from from gas outlet, in other embodiments, can not arrange Stop structure, by installing the reliability that tightening device ensures to connect additional in the periphery of elastic conical drogue.
In the present embodiment, Stop structure is the annular flange flange be located in interface, in other embodiments, can arrange the groove of other shapes on gas outlet, interface inner peripheral surface is arranged and assembles with groove type the stop block closed.
In the present embodiment, as shown in Figure 2, interface is identical with passage diameter for the structure of joint, and in other embodiments, as shown in Figure 6, interface can be larger than the diameter of passage.
It is of the present invention that to fill nitrogen weld connection apparatus structure simple, easy to operate, support staff does not need frequently to travel to and fro between welding post and nitrogen cylinder in use, direct control stop valve can control the break-make of nitrogen, working strength reduces greatly, this fills the welding that nitrogen weld connection device can be applicable to the rigid pipe of plurality of specifications and fills nitrogen simultaneously, and welding can be carried out to multiple rigid pipe simultaneously fill nitrogen, the elastic conical drogue of this device joint is also provided with annular groove, not only can prevent plug-in mounting from excessively damaging rigid pipe when installing rigid pipe, also improve the firm degree of connection of rigid pipe and joint, extend service life.
The embodiment of a kind of joint of the present invention: as shown in Figure 2 and Figure 6, its concrete structure is identical with the joint design in above-mentioned embodiment of filling nitrogen weld connection device, repeats no more herein.
Claims (10)
1.
a kind of joint, comprise the elastic conical drogue that little rear end, front end is large, described elastic conical drogue has the interface for being connected with the gas outlet of source of the gas and the male cone (strobilus masculinus) for being connected with rigid pipe, it is characterized in that, on the male cone (strobilus masculinus) of described elastic conical drogue, axially spaced-apart is provided with the annular groove of the end correspondence insertion for the rigid pipe of different tube diameters, and on front side of described annular groove, groove forms along place and front side groove the deformed region extruding interference fit with rigid pipe along contiguous tapered portion.
2.
joint according to claim 1, is characterized in that, the center of described elastic conical drogue is provided with axially extended passage, and described is communicated with passage for the interface be connected with gas outlet.
3. joint according to claim 1 and 2, is characterized in that, the inner peripheral surface of described interface is provided with for coordinating with gas outlet block and preventing the Stop structure that elastic conical drogue departs from from gas outlet.
4.
joint according to claim 3, is characterized in that, described Stop structure is the annular flange flange be located in interface.
5.
one fills nitrogen weld connection device, comprise the air delivery device be connected with source of the gas and the joint being connected to air delivery device gas outlet, described joint comprises the large elastic conical drogue in little rear end, front end, described elastic conical drogue has the syndeton for being connected with the gas outlet of source of the gas and the male cone (strobilus masculinus) for being connected with rigid pipe, it is characterized in that, on the male cone (strobilus masculinus) of described elastic conical drogue, axially spaced-apart is provided with the annular groove of the end correspondence insertion for the rigid pipe of different tube diameters, on front side of described annular groove, groove forms along place and front side groove the deformed region extruding interference fit with rigid pipe along contiguous tapered portion.
6.
according to claim 5ly fill nitrogen weld connection device, it is characterized in that, the center of described elastic conical drogue is provided with axially extended passage, and described is communicated with passage for the interface be connected with gas outlet.
7.
according to claim 5 or 6, fill nitrogen weld connection device, it is characterized in that, the inner peripheral surface of described interface is provided with for preventing with gas outlet block the Stop structure that elastic conical drogue departs from from gas outlet.
8.
according to claim 7ly fill nitrogen weld connection device, it is characterized in that, described Stop structure is the annular flange flange be located in interface.
9.
according to claim 5ly fill nitrogen weld connection device, it is characterized in that, described air delivery device comprises branch chamber, and the end of described branch chamber is provided with the air inlet for being connected with source of the gas of metric system and/or English system, and described branch chamber is provided with identical gas outlet, two or more aperture.
10. according to claim 9ly fill nitrogen weld connection device, it is characterized in that, described air inlet is provided with stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410819071.4A CN104708164B (en) | 2014-12-25 | 2014-12-25 | A kind of connector and the nitrogen charging weld connection device using the connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410819071.4A CN104708164B (en) | 2014-12-25 | 2014-12-25 | A kind of connector and the nitrogen charging weld connection device using the connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104708164A true CN104708164A (en) | 2015-06-17 |
| CN104708164B CN104708164B (en) | 2018-06-08 |
Family
ID=53408166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410819071.4A Expired - Fee Related CN104708164B (en) | 2014-12-25 | 2014-12-25 | A kind of connector and the nitrogen charging weld connection device using the connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104708164B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764408A (en) * | 2017-01-17 | 2017-05-31 | 北京市观象台 | One kind is filled ball device inflated wheel and fills ball device |
| CN108180330A (en) * | 2017-12-20 | 2018-06-19 | 长沙格力暖通制冷设备有限公司 | Nitrogen charging connector |
| CN109253324A (en) * | 2018-08-09 | 2019-01-22 | 长沙格力暖通制冷设备有限公司 | Connecting structure between inflating nozzle and pipe joint and welding device |
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| CN201884845U (en) * | 2010-12-07 | 2011-06-29 | 谭海英 | Quick connector for assembly of pipeline flexible connection |
| CN202927330U (en) * | 2012-09-13 | 2013-05-08 | 西安德龙新型建筑材料科技有限责任公司 | Quick coupling used for plate radiator gas / oil rapid filling |
| CN203517104U (en) * | 2013-08-21 | 2014-04-02 | 内蒙古第一机械集团有限公司 | Pipeline pressing quick-changing connector |
| CN203509384U (en) * | 2013-08-15 | 2014-04-02 | 格力电器（石家庄）有限公司 | Nitrogen charging tool and air conditioner welding tool with nitrogen charging tool |
| CN104061391A (en) * | 2014-06-25 | 2014-09-24 | 上海海立特种制冷设备有限公司 | Pagoda type joint for oil cooler |
| CN204004904U (en) * | 2014-07-09 | 2014-12-10 | 江阴海陆高压管件有限公司 | Pipe fitting joint |
| CN204818362U (en) * | 2014-12-25 | 2015-12-02 | 河南牧业经济学院 | Connect and use this joint fill nitrogen welded joint device |
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2014
- 2014-12-25 CN CN201410819071.4A patent/CN104708164B/en not_active Expired - Fee Related
Patent Citations (7)
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| CN201884845U (en) * | 2010-12-07 | 2011-06-29 | 谭海英 | Quick connector for assembly of pipeline flexible connection |
| CN202927330U (en) * | 2012-09-13 | 2013-05-08 | 西安德龙新型建筑材料科技有限责任公司 | Quick coupling used for plate radiator gas / oil rapid filling |
| CN203509384U (en) * | 2013-08-15 | 2014-04-02 | 格力电器（石家庄）有限公司 | Nitrogen charging tool and air conditioner welding tool with nitrogen charging tool |
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| CN104061391A (en) * | 2014-06-25 | 2014-09-24 | 上海海立特种制冷设备有限公司 | Pagoda type joint for oil cooler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764408A (en) * | 2017-01-17 | 2017-05-31 | 北京市观象台 | One kind is filled ball device inflated wheel and fills ball device |
| CN108180330A (en) * | 2017-12-20 | 2018-06-19 | 长沙格力暖通制冷设备有限公司 | Nitrogen charging connector |
| CN109253324A (en) * | 2018-08-09 | 2019-01-22 | 长沙格力暖通制冷设备有限公司 | Connecting structure between inflating nozzle and pipe joint and welding device |
| CN109253324B (en) * | 2018-08-09 | 2020-12-22 | 长沙格力暖通制冷设备有限公司 | Connecting structure between inflating nozzle and pipe joint and welding device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104708164B (en) | 2018-06-08 |
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