CN217585467U

CN217585467U - Expansion tool for heat exchange tube and fin

Info

Publication number: CN217585467U
Application number: CN202221547685.8U
Authority: CN
Inventors: 王雨; 陈宝鑫; 张立忠; 马蕊; 卞冰; 王轶群; 王尚峰
Original assignee: Shenyang Blower Group Auxiliary Equipment Complete Engineering Co ltd
Current assignee: Shenyang Blower Group Auxiliary Equipment Complete Engineering Co ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-10-14
Anticipated expiration: 2032-06-20

Abstract

The utility model provides a logical frock that expands of heat exchange tube and fin, including can set up the bloated ball that expands that is used for leading to the heat exchange tube in the heat exchange tube, tail end intercommunication high-pressure liquid can let in the person in charge of high-pressure liquid in to the heat exchange tube, the cover is arranged in around the person in charge front end can set up sealed pad and sleeve pipe in the heat exchange tube with the person in charge together, sealed pad anterior fixed set up fastening nut will sealed pad and sleeve pipe are spacing be responsible for, it is spacing that the sleeve pipe rear portion passes through the baffle, the baffle is fixed through the fixed bolster of fixing the tube sheet on the heat exchange tube and being connected with the tube sheet. The utility model provides a pair of logical bloated frock of heat exchange tube and fin, simple structure, the input cost is low, and it is of high quality to expand to connect, and it is efficient to expand to connect.

Description

Expansion tool for heat exchange tubes and fins

Technical Field

The utility model relates to a cooler heat exchange tube and fin expanded joint technical field, in particular to heat exchange tube and fin's logical bloated frock.

Background

With the large-scale air separation compressor unit and the continuous tightening of the cost of the pressure vessel, the research on the cost reduction of the gas cooler of the low-pressure and large-scale air separation compressor is more and more urgent. The heat exchange tube of the gas cooler of the conventional air separation unit is a bimetal rolling composite tube, and the cost is higher. The composite tube replaced by the expansion-connection combined heat exchange element of the fins and the light tube not only increases the heat exchange area in unit volume, but also saves the arrangement space of the whole machine and reduces the manufacturing cost of equipment.

The principle that the fin is connected with the heat exchange tube leads to expanding through the heat exchange tube and makes the heat exchange tube external diameter increase, and the fin hole takes place elastic deformation when the heat exchange tube takes place plastic deformation, with the contact laminating of fin.

The conventional expansion connection mode of the fins and the heat exchange tubes is as follows: the first method is to seal two ends of a heat exchange tube, continuously pressurize the inside of the heat exchange tube through a high-pressure medium until the outer diameter of the heat exchange tube is increased, and complete the expansion joint of fins and the heat exchange tube. The method has high requirement on the uniformity of the wall thickness of the heat exchange pipe, and the pipe is easy to explode during operation, so that the expansion joint quality is unstable. The second method is that under the action of mechanical external force, the expansion head is driven to move in the heat exchange tube, so that the inner diameter and the outer diameter of the heat exchange tube are increased, and the expansion joint of the fins and the heat exchange tube is completed. The method has high expansion joint quality, but has low operation efficiency, needs special pulling and pushing expansion equipment and has high investment cost.

Therefore, the expansion connection equipment for the heat exchange tube and the fins, which has the advantages of stable expansion connection quality, high expansion connection efficiency and low investment cost, is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a heat exchange tube that simple structure, input cost are low, the expanded joint is of high quality, the expanded joint is efficient and leads to bloated frock with the fin is provided.

In order to solve the technical problem, the utility model provides a heat exchange tube and logical bloated frock of fin, including can set up the bloated ball that is used for leading to the heat exchange tube in the heat exchange tube, tail end intercommunication high-pressure liquid can let in the person in charge of high-pressure liquid in to the heat exchange tube, the front and back cover is arranged in the person in charge front end can set up sealed pad and sleeve pipe in the heat exchange tube together with the person in charge, sealed pad front portion is fixed set up fastening nut will sealed pad and sleeve pipe are spacing on the person in charge, it is spacing that the sleeve pipe rear portion passes through the baffle, the baffle is fixed through the tube sheet of fixing on the heat exchange tube and the fixed bolster of being connected with the tube sheet.

Further, the sleeve comprises a cylindrical extension part and a disc-shaped bulge part integrally formed with the extension part, the extension part can be sleeved on the main pipe, the sealing gasket is located at the front part of the extension part, and the bulge part is arranged on the outer side of the pipe orifice of the heat exchange pipe.

Further, the outer diameter of the expansion ball is 0.55mm larger than the inner diameter of the heat exchange tube, the outer diameter of the extension part is matched with the inner diameter of the heat exchange tube, and the outer diameter of the protrusion part is larger than the inner diameter of the heat exchange tube.

Furthermore, the fixed support is a pair of fixed plates connected with the tube plate through bolts, the baffle is a rectangular baffle with a round hole in the middle, the inner diameter of the round hole of the baffle is larger than the outer diameter of the main tube, the baffle is sleeved on the main tube through the round hole and limits the protruding part at the outer side of the tube opening of the heat exchange tube, and two ends of the baffle are fixed with the fixed plates respectively.

Furthermore, the outer diameter of the sealing gasket is 0.6-0.7mm larger than the inner diameter of the heat exchange tube, and an annular groove with a U-shaped section is formed in the end face, close to the expansion ball, of the sealing gasket in the circumferential direction of the sealing gasket.

Furthermore, the sealing gasket is made of polyurethane.

Furthermore, the tail end of the main pipe is connected with a high-pressure pipe for providing high-pressure liquid through a conversion joint.

Furthermore, the material of the expansion ball is a high-hardness metal material, and the surface roughness of the expansion ball is not more than Ra0.15 mu m.

The utility model provides a pair of logical bloated frock of heat exchange tube and fin sets up the ball that expands in the heat exchange tube, lets in high-pressure liquid in to the heat exchange tube by being responsible for, promotes the ball that expands through high-pressure liquid and removes inside the heat exchange tube, makes the heat exchange tube inside continuously keep high pressure through high-pressure liquid simultaneously, makes the increase of heat exchange tube external diameter, makes the fin hole on the heat exchange tube take place elastic deformation to make heat exchange tube and fin contact laminating, accomplish the joint that expands. The utility model provides a pair of logical bloated frock of heat exchange tube and fin, it is simple to the expanded joint of heat exchange tube and fin, and the expanded joint steady quality, expanded joint efficiency is higher. In addition, the expansion tool is simple in structure, easy to machine and manufacture, low in input cost and high in economic benefit.

Drawings

Fig. 1 is a front view of a structure of an expansion tool for heat exchange tubes and fins provided by an embodiment of the present invention;

fig. 2 is a right side view of an expanding tool for heat exchange tubes and fins provided by the embodiment of the present invention;

fig. 3 is the sealed pad cross-sectional view of the swelling frock of heat exchange tube and fin that the embodiment of the utility model provides a.

Detailed Description

Referring to fig. 1, an embodiment of the present invention provides an expansion tool for heat exchange tubes and fins, including an expansion ball 1, a main tube 2, a sleeve 3 and a sealing gasket 4. The front end of the main pipe 2 can be arranged in the heat exchange pipe 7, the tail end of the main pipe 2 is communicated with high-pressure liquid, the high-pressure liquid can be introduced into the heat exchange pipe 7, the expansion ball 1 is arranged in the heat exchange pipe 7, and under the pushing action of the high-pressure liquid sprayed into the main pipe 2, the expansion ball 1 moves forwards in the heat exchange pipe 7, so that the heat exchange pipe 7 is expanded. In order to seal the high-pressure liquid entering the heat exchange tube 7, a sealing gasket 4 and a sleeve 3 are sequentially arranged at the front end of the main tube 2 from front to back, and the sealing gasket 4 and the sleeve 3 are arranged in the heat exchange tube 7 together with the main tube 2. A fastening nut 5 is provided on the front surface of the gasket 4, and the fastening nut 5 is fixed to the front end of the main pipe 2 to fix the gasket 4 and the sleeve 3 on the main pipe 2 and prevent the gasket 4 and the sleeve 3 from falling off from the front end of the main pipe 2. As a concrete implementation of the utility model, the 2 front end surfaces of being responsible for set up the external screw thread, and fastening nut 5 fixes through the mode of spiro union and carries on spacingly to sealed 4 and sleeve pipe 3 of the tip of being responsible for 2.

Meanwhile, in order to prevent the main pipe 2 from withdrawing from the heat exchange pipe 7 under the reaction force of the high-pressure liquid, the position of the rear part of the sleeve 3 is limited by a baffle plate 8, and the baffle plate 8 is fixed by a pipe plate 9 fixed on the heat exchange pipe 7 and a fixing bracket 10 connected with the pipe plate 9.

As a specific embodiment of the present invention, the sleeve 3 includes a cylindrical extension 31 and a disc-shaped protrusion 32 integrally formed with the extension 31, the extension 31 can be sleeved on the front end of the main pipe 2, the sealing pad 4 is located in front of the extension 31, the protrusion 32 is disposed outside the pipe orifice of the heat exchange pipe 7, and the outer diameter of the protrusion 32 is greater than the inner diameter of the heat exchange pipe 7.

As a specific embodiment of the present invention, referring to fig. 2, the fixing bracket 10 is a pair of fixing plates 11, the upper and lower ends of each fixing plate 11 are connected to the tube plate 9 through bolts 12. The baffle 8 is a rectangular baffle with a round hole in the middle, the round hole inner diameter of the baffle 8 is larger than the outer diameter of the main tube 2, the baffle 8 is limited to the protruding portion 32 of the sleeve 3 outside the pipe orifice of the heat exchange tube 7 on the main tube 2 through the round hole sleeve, and the two ends of the baffle 8 are fixed through the fixing plates 11 respectively.

As a specific embodiment of the utility model, the external diameter of ball 1 expands is greater than the internal diameter of heat exchange tube 7 by 0.55mm, and in order to realize that ball 1 expands and effectively leads to the bloating to the heat exchange tube, ball 1 material that expands adopts high rigidity metal material or other high rigidity materials to guarantee that ball that expands has sufficient hardness. In addition, in order to make the expansion ball move smoothly in the heat exchange tube 7, the surface roughness of the expansion ball 1 is not more than Ra0.15 μm.

As a specific embodiment of the present invention, the outer diameter of the extension portion 31 of the sleeve 3 is matched with the inner diameter of the heat exchange tube 7, so that the extension portion 31 of the sleeve 3 and the main tube 2 are inserted into the heat exchange tube 7 together.

As a concrete implementation mode of the utility model, sealed 4 materials of filling up are the polyurethane material, have better plasticity, and after high-pressure liquid got into heat exchange tube 7 through being responsible for 2, high-pressure liquid carried out extrusion deformation to sealed 4 of filling up with sleeve pipe 3 combined action, made to seal and form good sealed between 4 and the heat exchange tube 7 inner wall of filling up. In order to achieve better sealing effect, the outer diameter of the sealing gasket 4 is 0.6-0.7mm larger than the inner diameter of the heat exchange tube 7. Also, referring to fig. 3, an annular groove 41 having a U-shaped cross section is provided in the circumferential direction of the gasket 4 on the end surface of the gasket 4 on the side adjacent to the expansion ball 1. Under high-pressure liquid's effect, sealed 4 of filling up are compressed tightly on sleeve pipe 3, form the closed chamber, and along with intracavity pressure increases, the U type both sides of sealed 4 annular groove 41 of filling up expand to both sides gradually and produce the deformation, form the self sealss, can prevent effectively like this that the high-pressure liquid in the heat exchange tube 7 from sealed 4 of filling up to the outside infiltration of heat exchange tube 7 to can effectively guarantee the logical pressure of bloating of the interior ball 1 of heat exchange tube 7.

As a specific embodiment of the utility model, the tail end of being responsible for 2 sets up crossover sub 6, is responsible for 2 tail ends and passes through crossover sub 6 and the high-pressure tube connection that provides high-pressure liquid, inserts back in the heat exchange tube 7 when being responsible for 2, can inject high-pressure liquid in the heat exchange tube 7 through being responsible for 2.

The utility model provides a pair of lead to bloated frock of heat exchange tube and fin during the use, carries out the flaring to heat exchange tube 7 earlier and handles, then will expand ball 1 and put into in heat exchange tube 7. The packing 4 and the sleeve 3 are inserted into the heat exchange pipe 7 to be expanded together with the front end of the main pipe 1. The baffle plate 8 is sleeved on the main pipe 2 from the tail part of the main pipe 2 through a circular hole in the middle of the baffle plate to block the convex part 32 of the sleeve 3, and then two ends of the baffle plate 8 are respectively fixed on the two fixing plates 11 of the fixing support 10. The two fixing plates 11 of the fixing bracket 10 are respectively connected with the tube plate 9 by using bolt holes of the tube plate 9 itself and bolts 12, and fixing nuts connecting the tube plate 9 and both ends of the bolts 12 of the fixing bracket 10 are tightened to press the baffle plate 8 against the boss 32 of the sleeve 3. And then the tail part of the main pipe 2 is connected to a high-pressure pipe through the adapter 6, the high-pressure pipe is started to enable high-pressure liquid to enter the heat exchange pipe 7 from the main pipe 2, the high-pressure liquid and the sleeve 3 jointly extrude the sealing gasket 4 to cause the deformation of the sealing gasket 4, and the sealing is formed between the sealing gasket 4 and the inner wall of the heat exchange pipe 7. The expansion joint of the heat exchange tube 7 and the fins is carried out under the combined action of the expansion ball 1 pushed by the high-pressure liquid and the hydraulic pressure in the heat exchange tube 7.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a lead to frock that expands of heat exchange tube and fin, its characterized in that, including can set up be used for leading to the bloated ball (1) that expands of heat exchange tube (7) in heat exchange tube (7), tail end intercommunication high-pressure liquid can let in high-pressure liquid in heat exchange tube (7) be responsible for (2), the front and back cover is arranged in be responsible for (2) front end can set up sealed pad (4) and sleeve pipe (3) in heat exchange tube (7) with being responsible for (2) together, sealed pad (4) front portion is fixed to be set up fastening nut (5) will sealed pad (4) and sleeve pipe (3) are spacing be responsible for (2) on, it is spacing that baffle (8) are passed through at sleeve pipe (3) rear portion, baffle (8) are fixed through tube sheet (9) of fixing on heat exchange tube (7) and fixed bolster (10) be connected with tube sheet (9).

2. The tool for expanding the heat exchange tube and the fin according to claim 1, wherein: the sleeve (3) comprises a cylindrical extension part (31) and a disc-shaped bulge part (32) integrally formed with the extension part (31), the extension part (31) can be sleeved on the main pipe (2), the sealing gasket (4) is located at the front part of the extension part (31), and the bulge part (32) is arranged on the outer side of a pipe orifice of the heat exchange pipe (7).

3. The swelling frock of heat exchange tube and fin of claim 2, characterized in that: the outer diameter of the expansion ball (1) is 0.55mm larger than the inner diameter of the heat exchange tube (7), the outer diameter of the extension part (31) is matched with the inner diameter of the heat exchange tube (7), and the outer diameter of the bulge part (32) is larger than the inner diameter of the heat exchange tube (7).

4. The tool for expanding the heat exchange tube and the fin according to claim 3, wherein: fixed bolster (10) be a pair of pass through bolt (12) with fixed plate (11) that tube sheet (9) are connected, baffle (8) are the rectangle baffle that the centre was provided with the round hole, the round hole internal diameter of baffle (8) is greater than be responsible for (2) external diameter, baffle (8) are in through the round hole cover be responsible for (2) go up will bellying (32) are spacing in the mouth of pipe outside of heat exchange tube (7), baffle (8) both ends respectively with fixed plate (11) are fixed.

5. The swelling frock of heat exchange tube and fin of claim 2, characterized in that: the outer diameter of the sealing gasket (4) is larger than the inner diameter of the heat exchange tube (7) by 0.6-0.7mm, and the sealing gasket (4) is adjacent to an annular groove with a U-shaped section arranged on the end surface of one side of the expansion ball (1) along the circumferential direction of the sealing gasket (4).

6. The tool for expanding the heat exchange tube and the fin according to claim 2, wherein: the sealing gasket (4) is made of polyurethane.

7. The swelling frock of heat exchange tube and fin of claim 1, characterized in that: the tail end of the main pipe (2) is connected with a high-pressure pipe for providing high-pressure liquid through a conversion joint (6).

8. The swelling frock of heat exchange tube and fin of claim 1, characterized in that: the material of the expansion ball (1) is high-hardness metal, and the surface roughness of the expansion ball (1) is not more than Ra0.15 mu m.