CN115283557A - Automatic connection and expansion connection device for copper pipes and fins - Google Patents
Automatic connection and expansion connection device for copper pipes and fins Download PDFInfo
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- CN115283557A CN115283557A CN202210933873.2A CN202210933873A CN115283557A CN 115283557 A CN115283557 A CN 115283557A CN 202210933873 A CN202210933873 A CN 202210933873A CN 115283557 A CN115283557 A CN 115283557A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Pressure Members (AREA)
Abstract
The invention relates to an automatic connecting and expanding device for a copper pipe and a fin, which belongs to the technical field of expanding connection of the copper pipe and the fin and comprises a connector and a sleeve, wherein the connector comprises a connecting pipe and a sleeve, the connecting pipe is divided into a communicating section a, a communicating section b and a sealing section along the self axial direction, the end surface of the communicating section a is provided with a connecting hole a, the outer circular surface of the sealing section is provided with a connecting hole b communicated with the connecting hole a, the outside of the communicating section b is provided with an external thread a, an external thread b and an external thread c, the outside of the sealing section is sleeved with a sealing plug, two opening ends of the sealing plug inwards extend to form a sealing step, the sealing plug and the inner wall of a pipe opening of the copper pipe form interference fit, the sealing end of the sleeve is coaxially provided with a threaded hole, the inner part of the sealing plug is sleeved with a sealing sleeve, and the interference fit is formed between the sealing sleeve and the outer wall of the pipe opening of the copper pipe.
Description
Technical Field
The invention relates to the technical field of copper pipe and fin expansion joint, in particular to an automatic connecting and expansion joint device for a copper pipe and a fin.
Background
In the prior art, the connection between the copper pipe and the fin of the radiator or the heat exchanger generally adopts a pipe expansion process, and the copper pipe and the fin are connected and sealed by pressing force generated by the outer surface of the copper pipe and the inner surface of the mounting hole on the fin through the metal deformation and expansion of the copper pipe.
Common pipe expanding methods include a mechanical pipe expanding method and a hydraulic pipe expanding method, wherein the hydraulic pipe expanding method can overcome the defects that the mechanical pipe expanding method is limited in geometric shape and easily damages a thread protruding structure on the inner wall of a pipeline, and realizes the whole-process expanded connection of the whole copper pipe, but the hydraulic pipe expanding method also has the following defects:
1. when the copper pipe deforms, the internal pressure of the copper pipe is high, so that the requirements on the sealing performance between the copper pipe and the hydraulic connector and the stability of the connection between a hydraulic connector and the copper pipe are high, the former causes the structure of the hydraulic connector to be complex, the precision to be high and the processing difficulty to be high, and the latter causes the hydraulic connector to be inconvenient to disassemble and assemble, so that the production progress is delayed;
2. the copper pipe is close to mouth of pipe department and also can take place the metal deformation inflation, and the copper pipe is close to orificial part and is out of shape step by step, can make the gap appear in the junction that copper pipe and hydraulic pressure connect, and this gap can enlarge gradually, on the one hand, has further strengthened the requirement to sealing performance and connection steadiness between copper pipe and the hydraulic pressure connect, and on the other hand leads to the copper pipe mouth of pipe to appear local deformation, can influence the subsequent welding of adjacent two sets of copper pipes.
Therefore, the invention provides an automatic connecting and expanding device for a copper pipe and a fin.
Disclosure of Invention
In order to solve the problems mentioned in the background, the invention provides an automatic connecting and expanding device for copper pipes and fins.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.
The utility model provides an automatic connection and expanded joint device of copper pipe and fin, includes copper pipe and joint, connects and is used for constituting dual sealing connection with the mouth of pipe of copper pipe and connects sealing performance, the connection steadiness between and the copper pipe all to be the direct ratio with the intraductal pressure change of copper.
Furthermore, the connectors are provided with two groups, the input end of one group of connectors is provided with a liquid pipe a, the output end of the other group of connectors is used for being connected with one pipe orifice of the copper pipe, the input end of the other group of connectors is used for being connected with the other pipe orifice of the copper pipe, and the output end of the other group of connectors is provided with a liquid pipe b.
Further, the tail end of the liquid pipe a is communicated with a hydraulic system;
the tail end of the liquid pipe b is provided with a pressure limiting valve, a pressure measuring meter is arranged on the liquid pipe b, a liquid discharging pipe is further arranged on the liquid pipe b, and a control valve is arranged on the liquid discharging pipe.
Furthermore, the joint comprises a connecting pipe, and the inner cavity of the connecting pipe is a liquid filling hole;
the connecting pipe is divided into three sections along the self axial direction: the sealing section is located between the communicating section a and the communicating section b, the outer diameter of the sealing section is smaller than that of the communicating section a or the communicating section b, the outer diameter of the communicating section a is equal to that of the communicating section b, and a shaft shoulder is formed between the sealing section and the communicating section a or the communicating section b.
Furthermore, the end face of the communicating section a is provided with a connecting hole a, and the outer circular surface of the sealing section is provided with a connecting hole b communicated with the connecting hole a;
the outside of intercommunication section b is provided with the external screw thread, and the external screw thread is provided with three groups and is external screw thread a, external screw thread b and external screw thread c respectively, and external screw thread a is close to the seal section, and external screw thread b is located between external screw thread a and the external screw thread c, and external screw thread a is the same with external screw thread c's screw thread turning, and external screw thread b is opposite with external screw thread a or external screw thread c's screw thread turning.
Further, the joint further comprises a nut a corresponding to the external thread a and a nut b corresponding to the external thread c.
Furthermore, a sealing plug is sleeved outside the sealing section;
sealing steps extend inwards from both opening ends of the sealing plug, and when the sealing plug is sleeved outside the sealing section, the end faces of the two groups of sealing steps, which are opposite to each other, are respectively attached to the two groups of shaft shoulders;
the sealing plug and the inner wall of the pipe orifice of the copper pipe form interference fit.
Further, the joint further comprises a sealing ring a and a sealing ring b.
Further, the joint further comprises a sleeve;
the sleeve is one end opening, the round barrel structure of one end confined, and the coaxial screw hole that offers of telescopic blind end, screw hole and external screw thread b correspond and the sleeve passes through the screw hole and assembles to the takeover with the cooperation of external screw thread b.
Furthermore, a sealing sleeve is sleeved in the sleeve, and the sealing sleeve and the outer wall of the pipe orifice of the copper pipe form interference fit.
Compared with the prior art, the invention has the beneficial effects that:
1. in this scheme, the simple structure that connects, sealing performance between joint and the copper pipe, connect the steadiness and all accompany the increase of pressure in the copper pipe and increase, be the proportional relation, specifically be:
the pressure in the area a is consistent with that in the copper pipe, and the pressure in the area a is gradually changed along with the increase of the pressure in the copper pipe;
the pressure in the area a with the incremental change pushes the inner wall of the sealing plug to be more attached to the inner wall of the copper pipe, and pushes the sealing step to be more attached to the shaft shoulder, namely, the sealing performance and the connection stability between the sealing plug and the copper pipe are in a direct proportion relation with the pressure change in the area a;
meanwhile, the pipe wall of the copper pipe is pushed to be more fit with the sealing sleeve, namely, the sealing performance and the connection stability between the sealing sleeve and the copper pipe are in direct proportion to the pressure change in the area a.
2. In this scheme, the joint is under the ordinary pressure, directly fills in the copper pipe mouth of pipe, also is under the ordinary pressure, directly extracts from the copper pipe mouth of pipe, and the dismouting is convenient more quick.
3. In the scheme, the sealing plug and the sealing sleeve are sealing parts made of rubber materials and have certain elasticity, so that the opening of the copper pipe can be driven to expand under the condition that the sealing plug is pressed against by pressure, the expansion is limited by the sealing sleeve and the sleeve, and the expansion of the copper pipe is only small in amplitude but not greatly deformed, so that the subsequent U-shaped pipe welding is facilitated, and all copper pipes are communicated to form a whole.
Drawings
FIG. 1 is a schematic structural view of the present invention when the joint is not plugged into the copper pipe orifice;
FIG. 2 is a schematic structural view of the present invention when the joint is plugged into the copper pipe orifice;
FIG. 3 is a schematic view of the structure of the joint, liquid pipe a and liquid pipe b;
FIG. 4 is a schematic view of the structure of the joint;
FIG. 5 is a cross-sectional view of the joint;
FIG. 6 is a cross-sectional view of the nipple and sealing plug;
FIG. 7 is a cross-sectional view of the nipple and sleeve;
FIG. 8 is a cross-sectional view of the sleeve;
FIG. 9 is an exploded view of the present invention;
figure 10 is a cross-sectional view of the sleeve, annular mold, and sealing boot.
The reference numbers in the figures are:
1. a copper tube; 2. a fin; 3. a joint; 301. taking over a pipe; 302. a liquid-filled hole; 303. a connecting hole a; 304. a connecting hole b; 305. a sealing plug; 306. sealing the step; 307. a sleeve; 308. a nut a; 309. a sealing ring a; 310. a sealing ring b; 311. a nut b; 312. sealing sleeves; 313. a threaded hole; 314. an annular mold; 4. a liquid pipe a; 5. a liquid pipe b; 501. a pressure limiting valve; 502. a pressure gauge; 503. a liquid discharging pipe; 504. and a control valve.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, characteristics and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
In the prior art, the connection between the copper tube and the fin of the radiator or heat exchanger is generally realized by adopting a tube expansion process, and the copper tube and the fin are connected and sealed by pressing force generated by the outer surface of the copper tube and the inner surface of the mounting hole on the fin through metal deformation and expansion of the copper tube.
Common pipe expanding methods include a mechanical pipe expanding method and a hydraulic pipe expanding method, wherein the hydraulic pipe expanding method can overcome the defects that the mechanical pipe expanding method is limited in geometric shape and easily damages a thread protruding structure on the inner wall of a pipeline, and realizes the whole-process expanded connection of the whole copper pipe, but the hydraulic pipe expanding method also has the following defects:
1. when the copper pipe deforms, the internal pressure of the copper pipe is high, so that the requirements on the sealing performance between the copper pipe and the hydraulic connector and the stability of the connection between a hydraulic connector and the copper pipe are high, the former causes the structure of the hydraulic connector to be complex, the precision to be high and the processing difficulty to be high, and the latter causes the hydraulic connector to be inconvenient to disassemble and assemble, so that the production progress is delayed;
2. the copper pipe is close to mouth of pipe department and also can take place the metal deformation inflation, and the copper pipe is close to orificial part and warp step by step, can make the gap appear in the junction that copper pipe and hydraulic pressure connect, and this gap can enlarge gradually, on the one hand, has further strengthened the requirement to sealing performance and connection steadiness between copper pipe and the hydraulic pressure connect, and on the other hand leads to the copper pipe mouth of pipe local deformation to appear, can influence adjacent two sets of subsequent welding of copper pipe.
Therefore, the invention provides an automatic connecting and expanding device for copper pipes and fins, which has a simple structure, the sealing performance and the connecting stability between the device and the copper pipes are increased along with the increase of the pressure in the copper pipes, and the device is in a direct proportion relationship.
As shown in fig. 1-9, the present invention comprises two sets of connectors 3, wherein the connectors 3 are provided with two sets, the input end of one set of connectors 3 is provided with a liquid pipe a4, the output end is used for being connected with one pipe orifice of the copper pipe 1, the input end of the other set of connectors 3 is used for being connected with the other pipe orifice of the copper pipe 1, and the output end is provided with a liquid pipe b5.
The end of the liquid pipe a4 is communicated with a hydraulic system, the hydraulic system is used for supplying a hydraulic medium into the copper pipe 1 through the liquid pipe a4 and the joint 3, the hydraulic medium can be hydraulic oil or compressed air, and the hydraulic system can be realized by the conventional technical means and is not described in detail.
The end of the liquid pipe b5 is provided with a pressure limiting valve 501, the working pressure of the pressure limiting valve 501 is adjustable, when the pressure in the copper pipe 1 is higher than the working pressure of the pressure limiting valve 501, the hydraulic medium can be discharged through the pressure limiting valve 501, the working pressure of the pressure limiting valve 501 is correspondingly matched with the metal deformation and expansion of the copper pipe 1, the pressure limiting valve 501 is arranged to prevent the excessive expansion and deformation of the copper pipe 1 caused by the excessive filling of the hydraulic medium into the copper pipe 1, and the pressure limiting valve 501 can be realized by the conventional technical means in the prior art and is not described in detail.
And the liquid pipe b5 is provided with a pressure gauge 502 for monitoring and displaying the pressure value in the copper pipe 1 in real time for an operator to observe and judge, and the pressure gauge 502 can be realized by the conventional technical means and is not described again.
A liquid discharging pipe 503 is further disposed on the liquid pipe b5, a control valve 504 is disposed on the liquid discharging pipe 503 for controlling the opening and closing of the liquid discharging pipe 503, when the copper pipe 1 is expanded, the control valve 504 is closed, and after the expansion joint is completed, the control valve 504 is opened to discharge the hydraulic medium in the copper pipe 1, and the control valve 504 is realized by the conventional technical means, and is not described again.
Specifically, as shown in fig. 4-9, the connector 3 includes a connection tube 301, and the inner cavity of the connection tube 301 is a liquid filling hole 302.
The connection pipe 301 is divided into three sections along the axial direction: the connecting pipe comprises a connecting section a, a connecting section b and a sealing section, wherein the sealing section is positioned between the connecting section a and the connecting section b, the outer diameter of the sealing section is smaller than that of the connecting section a or the connecting section b, and the outer diameter of the connecting section a is equal to that of the connecting section b, so that two groups of shaft shoulders are formed on the connecting pipe 301.
The end surface of the communicating section a is provided with a connecting hole a303, and the outer circular surface of the sealing section is provided with a connecting hole b304 communicating with the connecting hole a 303.
The outside of intercommunication section b is provided with the external screw thread, and the external screw thread is provided with three groups and is external screw thread a, external screw thread b and external screw thread c respectively, and wherein, external screw thread a is close to the seal section, and external screw thread b is located between external screw thread a and the external screw thread c, and external screw thread a is the same with external screw thread c's screw thread direction of turning, and external screw thread b is opposite with external screw thread a or external screw thread c's screw thread direction of turning.
The joint 3 further includes a nut a308 corresponding to the external thread a and a nut b311 corresponding to the external thread c.
As shown in fig. 6, a sealing plug 305 is sleeved outside the sealing section, specifically, two opening ends of the sealing plug 305 extend inward to form sealing steps 306, and when the sealing plug 305 is sleeved outside the sealing section, end surfaces of two sets of sealing steps 306 opposite to each other are respectively attached to two sets of shaft shoulders.
The sealing plug 305 and the sealing step 306 are generally made of rubber materials, and have certain elasticity, so that the sealing plug 305 can be directly sleeved outside the sealing section.
The sealing plug 305 forms an interference fit with the inner wall of the opening of the copper tube 1.
As shown in fig. 7-9, the joint 3 further comprises two sets of sealing rings: seal ring a309 and seal ring b310.
The joint 3 further comprises a sleeve 307, the sleeve 307 is a circular cylinder structure with an open end and a closed end, a threaded hole 313 is coaxially formed in the closed end of the sleeve 307, the threaded hole 313 corresponds to the external thread b, and the sleeve 307 is assembled on the adapter 301 through the matching of the threaded hole 313 and the external thread b.
A gland 312 is sleeved inside the sleeve 307, and the gland 312 and the outer wall of the pipe orifice of the copper pipe 1 form an interference fit.
The assembly process of the joint 3 is embodied as follows:
firstly, a sealing plug 305 is sleeved outside a sealing section, the end faces of the two groups of sealing steps 306 opposite to each other are respectively attached to the two groups of shaft shoulders, and an area a formed by the inner wall of the sealing plug 305, the opposite end faces of the two groups of sealing steps 306 and the outer wall of the sealing section is communicated with a connecting hole b 304;
then, the nut a308 is screwed on the external thread a, and the nut a308 is tightly attached to the sealing plug 305;
then, a sealing ring a309 is sleeved outside the communication section b, and the sealing ring a309 is attached to the nut a 308;
then, the sleeve 307 is assembled on the external thread b through the matching of the threaded hole 313 and the external thread b, and the closed end of the sleeve 307 is tightly attached to the sealing ring a 309;
then, the sleeve 307 is sleeved with the sealing sleeve 312, the communicating section b is sleeved with the sealing ring b310, and the sealing ring b310 is attached to the closed end of the sleeve 307;
then, the nut a308 is screwed on the external thread c and the sealing ring b310 is tightly attached to the closed end of the sleeve 307, and the joint 3 is assembled.
The working principle of the invention is as follows:
the method comprises the following steps: assembling the copper pipe 1 and the fins 2;
step two: the sealing plug 305 and the sealing sleeve 312 are both sealing structures made of rubber materials, so that two groups of assembled joints 3 can be directly plugged into the pipe orifices of the copper pipe 1 respectively until the pipe orifices of the copper pipe 1 are contacted with the sealing ring a309, and the joints 3 cannot be plugged continuously;
at this moment, because constitute interference fit between sealing plug 305 and the mouth of pipe inner wall of copper pipe 1, constitute interference fit between the mouth of pipe outer wall of sealing boot 312 and copper pipe 1, and copper pipe 1 is inside to be the ordinary pressure state, so connect 3 and copper pipe 1 between through: the sealing plug 305 and the inner wall of the pipe orifice of the copper pipe 1 as well as the sealing sleeve 312 and the outer wall of the pipe orifice of the copper pipe 1 form double sealing fit;
step three: the control valve 504 is opened and the liquid discharge pipe 503 is arranged vertically upward;
the hydraulic medium enters the copper pipe 1 through the liquid pipe a4 and the liquid filling hole 302 in sequence, the air in the copper pipe 1 is discharged through the liquid pipe b5 and the liquid discharging pipe 503 in sequence, and the control valve 504 is closed after the air in the copper pipe 1 is discharged completely, namely the hydraulic medium overflows through the liquid discharging pipe 503;
step four: the hydraulic medium is continuously conveyed into the copper pipe 1, and the pressure intensity in the copper pipe 1 is increased gradually, so that the copper pipe 1 is subjected to expansion deformation;
in the process, because an area a formed by the inner wall of the sealing plug 305, the opposite end surfaces of the two groups of sealing steps 306 and the outer wall of the sealing section is communicated with the connecting hole b304, namely the pressure intensity in the area a is consistent with that in the copper pipe 1, the pressure intensity in the area a is also changed in an incremental manner;
the pressure in the area a with the incremental change pushes the inner wall of the sealing plug 305 to be more attached to the inner wall of the copper pipe 1, and the pushing sealing step 306 is more attached to the shaft shoulder, that is, the sealing performance and the connection stability between the sealing plug 305 and the copper pipe 1 are in a direct proportion relation to the pressure change in the area a, wherein the connection stability is incremented because the pressure change causes the pressure applied to the inner wall of the sealing plug 305 to be increased, so that the friction between the sealing plug 305 and the inner wall of the copper pipe 1 is increased, and the proportion of the increased friction is greater than the proportion of the increased pushing force generated by the increase of the pressure applied to the sealing plug 305 in the copper pipe 1;
meanwhile, the tube wall of the copper tube 1 is pushed to be more fit with the gland 312, that is, the sealing performance and the connection stability between the gland 312 and the copper tube 1 are in a direct proportion relation with the pressure change in the area a;
in addition, the sealing plug 305 is matched with the sealing sleeve 312, so that the pipe orifice of the copper pipe 1 can be prevented from being greatly deformed, and the pipe orifice of the copper pipe 1 only has small-amplitude flaring, thereby being beneficial to the subsequent welding of U-shaped pipes and enabling all the copper pipes to be communicated to form a whole;
step five: after the copper pipe 1 and the fin 2 are expanded, the control valve 504 is opened, the hydraulic medium in the copper pipe 1 is discharged through the liquid discharging pipe 503, the pressure in the copper pipe 1 is recovered to the normal pressure, the sealing performance and the connection stability between the copper pipe 1 and the sealing plug 305 or the sealing sleeve 312 are also reduced and recovered, and at the moment, the joint 3 can be directly pulled out.
In the fourth step, the larger proportion of the friction force between the sealing plug 305 and the inner wall of the copper tube 1 is larger than the larger proportion of the pushing force generated by the increase of the pressure inside the copper tube 1 on the sealing plug 305 because:
F1＝P*S1；F2＝P*S2*f；
when F2> F1, S2 × F > S1;
wherein F1 is the pushing force of the sealing plug 305 under the pressure in the copper pipe 1;
f2 is the friction between the sealing plug 305 and the inner wall of the copper tube 1;
p is the pressure intensity in the copper pipe 1;
s1 is the area of the end face of the sealing plug 305;
s2 is the inner wall area of the sealing plug 305;
f is the coefficient of friction between the rubber and the copper.
Therefore, only by satisfying S2 × f > S1, it can be ensured that the ratio of the increase of the friction force between the sealing plug 305 and the inner wall of the copper tube 1 is greater than the ratio of the increase of the pushing force generated by the increase of the pressure inside the copper tube 1 on the sealing plug 305, that is, the connection stability between the sealing plug 305 and the copper tube 1 is in a direct proportion to the pressure change inside the copper tube 1.
In the fourth step, the area a is communicated with the copper pipe through the matching of the connecting hole a and the connecting hole b, but is not directly communicated with the liquid filling hole through the connecting hole b, because a hydraulic medium flows in the liquid filling hole in the latter, and a negative pressure difference exists between the area a and the liquid filling hole according to the Bernoulli principle, therefore, the former is selected in the scheme, and the communication with the copper pipe is realized through the matching of the connecting hole a and the connecting hole b, so that the pressure change between the area a and the copper pipe is consistent.
In a preferred embodiment, the sealing rings a309 and b310 are O-ring seals.
In a preferred embodiment, as shown in fig. 5, the diameters of the circumcircles of the nut a308 and the nut b311 are consistent with the inner diameter of the copper pipe 1; the hydraulic expansion joint device has the advantages that in the hydraulic expansion joint process after the joint 3 is plugged into the pipe orifice of the copper pipe 1, the diameter of the outer circle of the nut is consistent with the inner diameter of the copper pipe 1, the sealing steps 306 arranged at the two ends of the sealing plug 305 can be better supported and limited, the threaded connection between the nut a308 and the external thread a is in a rotating direction, the threaded connection between the nut b311 and the external thread c is in a rotating direction opposite to the threaded connection between the threaded hole 313 and the external thread b, and the threaded connection in the scheme can be guaranteed to be more stable.
In a preferred embodiment, as shown in fig. 10, an annular mold 314 is further disposed between the sleeve 307 and the sealing sleeve 312, specifically, two ends of the annular mold 314 are open, an outer diameter of the annular mold 314 matches an inner diameter of the sleeve 307, and the annular mold 314 can be sleeved in the sleeve 307.
The inner cavity of the annular mold 314 is divided into two sections along the axial direction: a cylindrical section and a circular platform section.
The shape of the sealing sleeve 312 is matched with the shape of the inner cavity of the annular mold 314, and the sealing sleeve 312 can be sleeved in the annular mold 314; the significance is that after the joint 3 is plugged into the opening of the copper pipe 1, the cylindrical part of the sealing sleeve 312, which is matched with the cylindrical section inner cavity of the annular die 314, forms interference fit with the outer wall of the copper pipe 1, namely, a double sealing fit is formed, in the following hydraulic expansion process, the pressure in the area a drives the sealing plug 305 to elastically deform, and a flare is expanded on the part of the opening of the copper pipe 1, which is located in the truncated cone section inner cavity of the annular die 314, of course, if the annular die 314 is not added, the flare at the opening of the copper pipe 1 is a cup-shaped flare.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (10)
1. The utility model provides an automatic connection and expanded joint device of copper pipe and fin, includes copper pipe (1) and joint (3), its characterized in that, joint (3) are used for constituting double sealing with the mouth of pipe of copper pipe (1) and connect sealing performance, connection steadiness between (3) and copper pipe (1) all and the pressure change in copper pipe (1) is the direct ratio relation.
2. The automatic connecting and expanding device for the copper pipe and the fin according to claim 1, wherein the joints (3) are provided with two groups, the input end of one group of joints (3) is provided with a liquid pipe a (4), the output end of one group of joints is used for being connected with one pipe orifice of the copper pipe (1), the input end of the other group of joints (3) is used for being connected with the other pipe orifice of the copper pipe (1), and the output end of the other group of joints is provided with a liquid pipe b (5).
3. The automatic connecting and expanding device for the copper pipes and the fins as claimed in claim 2, wherein the end of the liquid pipe a (4) is communicated with a hydraulic system;
the tail end of the liquid pipe b (5) is provided with a pressure limiting valve (501), the liquid pipe b (5) is provided with a pressure measuring meter (502), the liquid pipe b (5) is also provided with a liquid discharging pipe (503), and the liquid discharging pipe (503) is provided with a control valve (504).
4. The automatic connecting and expanding device for the copper pipes and the fins as claimed in claim 2 or 3, wherein the joint (3) comprises a connecting pipe (301), and the inner cavity of the connecting pipe (301) is a liquid filling hole (302);
the connecting pipe (301) is divided into three sections along the self axial direction: the sealing section is positioned between the communicating section a and the communicating section b, the outer diameter of the sealing section is smaller than that of the communicating section a or the communicating section b, the outer diameter of the communicating section a is equal to that of the communicating section b, and a shaft shoulder is formed between the sealing section and the communicating section a or the communicating section b.
5. The automatic connecting and expanding device for the copper pipe and the fin according to claim 4, wherein the end face of the communicating section a is provided with a connecting hole a (303), and the outer circular surface of the sealing section is provided with a connecting hole b (304) communicated with the connecting hole a (303);
the outside of intercommunication section b is provided with the external screw thread, and the external screw thread is provided with three groups and is external screw thread a, external screw thread b and external screw thread c respectively, and external screw thread a is close to the seal segment, and external screw thread b is located between external screw thread a and the external screw thread c, and external screw thread a is the same with the screw thread handedness of external screw thread c, and external screw thread b is opposite with external screw thread a or external screw thread c's screw thread handedness.
6. An automatic coupling and expansion joint device for copper pipes and fins according to claim 5, wherein the joint (3) further comprises a nut a (308) corresponding to the external thread a and a nut b (311) corresponding to the external thread c.
7. An automatic connecting and expanding device for copper pipes and fins according to claim 6, wherein the sealing section is externally sleeved with a sealing plug (305);
sealing steps (306) extend inwards from the two open ends of the sealing plug (305), and when the sealing plug (305) is sleeved outside the sealing section, the end surfaces of the two groups of sealing steps (306) opposite to each other are respectively attached to the two groups of shaft shoulders;
the sealing plug (305) and the inner wall of the pipe opening of the copper pipe (1) form interference fit.
8. An automatic coupling and expansion joint device for copper pipes and fins according to claim 7, wherein the joint (3) further comprises a sealing ring a (309) and a sealing ring b (310).
9. An automatic copper pipe and fin connecting and expanding apparatus as claimed in claim 8, wherein said joint (3) further comprises a sleeve (307);
sleeve (307) are one end opening, the round tube structure of one end confined, and threaded hole (313) is seted up to the blind end coaxial of sleeve (307), and threaded hole (313) correspond with external screw thread b and sleeve (307) are assembled to taking over (301) through the cooperation of threaded hole (313) with external screw thread b.
10. The automatic connecting and expanding device for copper tubes and fins as claimed in claim 9, wherein a gland (312) is sleeved inside the sleeve (307), and the gland (312) and the outer wall of the tube opening of the copper tube (1) form an interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210933873.2A CN115283557A (en) | 2022-08-04 | 2022-08-04 | Automatic connection and expansion connection device for copper pipes and fins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210933873.2A CN115283557A (en) | 2022-08-04 | 2022-08-04 | Automatic connection and expansion connection device for copper pipes and fins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115283557A true CN115283557A (en) | 2022-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210933873.2A Pending CN115283557A (en) | 2022-08-04 | 2022-08-04 | Automatic connection and expansion connection device for copper pipes and fins |
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| CN (1) | CN115283557A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115815436A (en) * | 2022-12-12 | 2023-03-21 | 北京理工大学珠海学院 | Pipe expanding device for improving production efficiency |
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2022
- 2022-08-04 CN CN202210933873.2A patent/CN115283557A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115815436A (en) * | 2022-12-12 | 2023-03-21 | 北京理工大学珠海学院 | Pipe expanding device for improving production efficiency |
| CN115815436B (en) * | 2022-12-12 | 2023-06-09 | 北京理工大学珠海学院 | Pipe expanding device capable of improving production efficiency |
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