Machining device of inner groove pipe for efficient heat exchanger

Abstract

A machining device of an inner groove pipe for an efficient heat exchanger comprises an oil cylinder, an oil cylinder seat, a coupler, a rotation stopping seat, a thrust seat, a connecting rod, a sleeve, a hydraulic chuck, a roller, an inner groove core head, a limiting stopper, a spring, a core rod, a base pipe, a drawing trolley and an equipment base. A linear groove can be formed in the inner wall of the pipe in the axis direction, the section of the groove can be rectangular, square or zigzag, and the efficient special pipe is made of materials such as carbon steel, stainless steel, titanium, nickel and nickel alloy, copper and copper alloy. The groove height of the inner groove pipe can be controlled by controlling the swell amount of the machining core head, the inner groove pipe with a certain groove height and groove pitch can be formed at a time by drawing the base pipe and rolling the pipe through the roller at the same time, pipe contracting through a pipe contracting device is not needed in the follow-up process, the follow-up machining procedures are reduced, the production efficiency is greatly improved, labor is reduced, and the production cost is reduced. The production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of special-shaped tubes for high-efficiency heat exchangers, in particular to the processing technology of inner groove tubes, in particular to a processing device for inner groove tubes for high-efficiency heat exchangers. Background Art

[0002] With the rapid development of society and the economy, energy consumption and environmental pollution are becoming increasingly severe, and all industries are becoming more aware of energy conservation. In the field of heat exchangers, high performance and high parameter requirements are being put forward, and various high-efficiency special-shaped tubes that can improve heat exchange efficiency have been introduced. Currently, the main method used on the market for manufacturing high-efficiency special-shaped tubes with internal groove structures is cold drawing, cold rolling and other multiple forming methods. This manufacturing method is cumbersome, requiring a set of process molds for each process, and has low production efficiency. Utility Model Content

[0003] The purpose of the utility model is to design a processing device for inner groove tubes for high-efficiency heat exchangers in order to address the problem that the existing inner groove structure of heat pipes has many processing steps and low efficiency. The device can control the groove height of the inner groove tube by controlling the expansion amount of the processing core head. By simultaneously drawing the base tube and rolling the tube with rollers, an inner groove tube with a certain groove height and groove pitch can be formed in one step. There is no need to use a tube reducer for subsequent tube reduction, which reduces subsequent processing steps, greatly improves production efficiency, reduces labor, and reduces production costs.

[0004] The technical solution of the utility model is as follows:

[0005] A processing device for an inner groove tube for a high-efficiency heat exchanger is characterized in that it includes an equipment base, on which a cylinder seat, a rotation stop seat, a thrust seat, a hydraulic chuck and a drawing trolley are installed. A cylinder is installed at one end of the cylinder seat, and the other end is processed with an external thread connected to the internal thread connected to one end of the coupling. The other end of the coupling is also provided with an internal thread; the coupling passes through the anti-rotation square groove on the rotation stop seat and is threadedly connected to one end of the connecting rod; the connecting rod passes through the thrust seat and is inserted into the sleeve and connected to the core rod with a taper. The thrust seat is A limiting circular hole is processed at one end to limit the axial displacement of the casing; the other end of the casing extends into the hydraulic chuck and abuts against one end of the inner groove core head; one end of the base pipe passes through the hydraulic chuck and is sleeved on the casing, and the other end is fixed on the drawing trolley; the inner groove core head is provided with an inner tapered hole and an outer circular groove so that when the tapered core rod moves axially, the inner groove core head can be radially deformed, thereby forcing the inner surface of the base pipe to form an inner groove; a roller is sleeved on the outer side of the base pipe corresponding to the inner groove core head to limit the change in the outer diameter of the base pipe, and the roller is installed on the hydraulic chuck.

[0006] The connecting rod is a bar with a circular cross section, one end of which is processed with an external thread of a certain length and the other end is processed with a threaded hole; the sleeve is a thick-walled tube, and one end of the connecting rod passes through the sleeve and is connected to the coupling.

[0007] The inner groove core head is a hard alloy steel product with good toughness. It consists of a cylinder with tapered ends and an inner tapered hole in the center, and a middle cylinder with an outer circular groove. The length L1 of the middle cylinder is 1 / 5 to 1 / 2 of the total length of the inner groove core head.

[0008] A limiter is installed on the right side of the inner groove core head, and a limit block matching the limiter is provided at one end of the core rod. The return spring is sleeved on the core rod, one end of which is against the limit block and the other end is against the step surface of the inner hole of the limiter.

[0009] The cylinder seat, connecting rod, inner groove core head, spring and core rod cooperate to work; the core rod and the central tapered hole of the inner groove core head have the same taper, and the small end of the core rod is processed with an external thread. After the core rod passes through the inner groove core head, it passes through the sleeve and is connected to the threaded hole of the connecting rod; by adjusting the cylinder on the cylinder seat, the piston is retracted, and the connecting rod moves backward. Under the action of the taper cooperation, the outer diameter of the inner groove core head is increased.

[0010] The base tube is a smooth tube made of carbon steel, stainless steel, titanium, nickel and nickel alloy, copper and copper alloy.

[0011] The beneficial effects of the utility model are:

[0012] The utility model controls the axial feed displacement of the core rod at the tapered hole of the inner groove core head by controlling the stroke of the oil cylinder. Since the core rod and the central tapered hole of the inner groove core head have the same taper and the inner groove core head has good toughness, the column with the groove in the middle of the inner groove core head will expand in the circumferential direction, and then the base pipe is pulled out, and the roller is started to press the outer side of the base pipe at the same time, so that a standard high-efficiency special-shaped pipe can be formed in one step. There is no need to use a pipe reducer for pipe shrinking later, which reduces subsequent processing steps, greatly improves production efficiency, reduces labor and reduces production costs.

[0013] The utility model can control the groove height of the inner groove tube by controlling the expansion amount of the processing core head. By simultaneously drawing the base tube and rolling the tube with rollers, the inner groove tube with a certain groove height and groove pitch can be formed in one step. There is no need to use a tube reducer for subsequent tube shrinkage, which reduces subsequent processing steps, greatly improves production efficiency, reduces labor, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of the inner groove pipe processing device of the present invention.

[0015] Figure 2 This is a structural diagram of the inner groove core head of the utility model.

[0016] Figure 3 It is a radial cross-sectional view of the inner groove core head of the present invention.

[0017] Figure 4 Schematic diagram of the inner groove core head of the present invention.

[0018] In the figure: 1-oil cylinder, 2-oil cylinder seat, 3-coupling, 4-anti-rotation seat, 5-thrust seat, 6-connecting rod, 7-casing, 8-hydraulic chuck, 9-roller, 10-inner groove core head, 11-limiter, 12-spring, 13-core rod, 14-base pipe, 15-drawing trolley, 16-equipment base, 100-taper, 101-inner tapered hole, 102-external circular groove. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following content is not intended to limit the present invention.

[0020] like Figure 1-Figure 4 shown.

[0021] A processing device for an inner groove pipe for a high-efficiency heat exchanger, comprising a cylinder 1, a cylinder seat 2, a coupling 3, a rotation stop 4, a thrust stop 5, a connecting rod 6, a sleeve 7, a hydraulic chuck 8, a roller 9, an inner groove core head 10, a limiter 11, a spring 12, a core rod 13, a base pipe 14, a drawing trolley 15, and an equipment base 16. Figure 1 As shown, one end of the oil cylinder seat 2 is processed with an external thread of a certain length. Both ends of the coupling 3 are processed with an internal thread of a certain depth. The anti-swivel seat 4 is processed with a square groove for limiting the rotation of the oil cylinder coupling. One end of the thrust seat 5 is processed with a limiting circular hole for limiting the axial displacement of the sleeve. The connecting rod 6 is a rod with a circular cross-section, one end of which is processed with an external thread of a certain length, and the other end is processed with a threaded hole of a certain depth. The sleeve 7 is a thick-walled tube, and the connecting rod 6 needs to be smoothly inserted into the sleeve 7 to connect with the coupling 3. The inner groove core head 10 is made of hard alloy steel with good toughness. It consists of a cylinder with a taper at both ends, a tapered hole in the center, and a cylinder with a groove in the middle. The length L1 is 1 / 5 to 1 / 2 of the total length. As shown Figure 2-Figure 4 shown.

[0022] The stopper 11 works in conjunction with the cylinder base 2, connecting rod 6, inner core head 10, spring 12, and core rod 13. Core rod 13 has the same taper as the central conical hole of inner core head 10. The small end of core rod 13 is threaded with a predetermined length of external thread. After passing through inner core head 10, core rod 13 is threaded into sleeve 7 and connected to the threaded hole of connecting rod 6. By adjusting the cylinder on cylinder base 2 to retract the piston, connecting rod 6 moves backward, and the tapered fit increases the outer diameter of inner core head 10. Base tube 14 is a standard smooth tube made of carbon steel, stainless steel, titanium, nickel and nickel alloys, copper and copper alloys, and other materials.

[0023] Figure 1 This is an embodiment of the present invention. In this embodiment, the left threaded hole of coupling 3 is fixedly connected to the external thread on cylinder base 2. The right end of coupling 3 extends into thrust block 5. The outer body of coupling 3 snaps into the square groove of anti-rotation block 4. The externally threaded end of connecting rod 6 passes through sleeve 7 and is fixedly connected to the right threaded hole of coupling 3. The left end of sleeve 7 extends into thrust block 5 to the cutoff surface of the stop hole. The externally threaded end of core rod 13 passes through inner groove core head 10, then passes into sleeve 7 and is fixedly connected to the threaded hole side of connecting rod 6.

[0024] Slide the entire cylinder base 2 to ensure that the inner groove core head 10 and the roller 9 are in the same position; insert the base tube 14 from the right side of the stopper 11, and place the clamping section of the base tube 14 outside the stopper 11; start the roller 9 to continuously spin the outer side of the base tube; adjust the cylinder on the cylinder base 2 to retract the piston. At this time, the connecting rod 6 moves backward. Under the action of the taper fit, the outer diameter of the inner groove core head 10 increases. At this time, the diameter of the cylindrical body with grooves is larger than the inner hole diameter of the base tube 14; then use the drawing trolley 15 to pull the base tube to the right, and you can form an inner groove tube with a certain groove height and groove pitch in one step. If you need to obtain an inner groove tube with a different cross-sectional shape, replace the inner groove core head 10 and repeat the above steps.

[0025] The parts not covered by the present invention are the same as those in the prior art or can be implemented by using the prior art.

Claims

1. A processing device for an inner groove tube for a high-efficiency heat exchanger, characterized in that: The device comprises an equipment base (16), on which a cylinder seat (2), a rotation stop seat (4), a thrust seat (5), a hydraulic chuck (8) and a pulling trolley (15) are installed. One end of the cylinder seat (2) is installed with a cylinder (1), and the other end is connected to a coupling. The other end of the coupling (3) is also provided with an internal thread. The coupling (3) passes through an anti-rotation square groove on the rotation stop seat (4) and is connected to one end of a connecting rod (6). The connecting rod (6) passes through the thrust seat (5) and is inserted into a sleeve (7) and is connected to a tapered core rod (13). One end of the thrust seat (5) is processed with a limiting circular hole for limiting the axial displacement of the sleeve (7). The sleeve (7) The other end of the inner groove core head (10) extends into the hydraulic chuck (8) and abuts against one end of the inner groove core head (10); one end of the base pipe (14) passes through the hydraulic chuck (8) and is sleeved on the sleeve (7), and the other end is fixed on the drawing trolley (15); the inner groove core head (10) is provided with an inner tapered hole (101) and an outer circular groove (102) so that when the tapered core rod (13) moves axially, the inner groove core head (10) can be radially deformed, thereby forcing the inner surface of the base pipe (14) to form an inner groove; a roller (9) for limiting the change in the outer diameter of the base pipe (14) is sleeved on the outer side of the base pipe (14) corresponding to the inner groove core head (10), and the roller (9) is installed on the hydraulic chuck (8).

2. The processing device for the inner groove tube for high-efficiency heat exchanger according to claim 1 is characterized in that: The connecting rod (6) is a rod with a circular cross section, one end of which is processed with an external thread of a certain length, and the other end of which is processed with a threaded hole; the sleeve (7) is a thick-walled tube, and one end of the connecting rod (6) passes through the sleeve (7) and is connected to the coupling 3.

3. The processing device for the inner groove tube for high-efficiency heat exchanger according to claim 1 is characterized in that: The inner groove core head (10) is a hard alloy steel product with good toughness, and is composed of a cylinder with tapers (100) at both ends, a tapered hole (101) in the center, and a cylinder with a groove (102) in the middle cylinder. The length L1 of the middle cylinder is 1 / 5 to 1 / 2 of the total length of the inner groove core head.

4. The processing device for the inner groove tube for high-efficiency heat exchanger according to claim 1 is characterized in that: A limiter (11) is installed on the right side of the inner groove core head (10), and a limit block matching the limiter (11) is provided at one end of the core rod (13). A return spring (12) is sleeved on the core rod (13), one end of which abuts against the limit block, and the other end of which abuts against the step surface of the inner hole of the limiter (11).

5. The processing device for the inner groove tube for high-efficiency heat exchanger according to claim 1 is characterized in that: The oil cylinder seat (2), connecting rod (6), inner groove core head (10), spring (12), and core rod (13) cooperate to function; the core rod (13) and the central conical hole of the inner groove core head (10) have the same taper, and the small end of the core rod (13) is processed with an external thread.

6. The processing device for the inner groove tube for high-efficiency heat exchanger according to claim 1 is characterized in that: The base tube (14) is a smooth tube product made of carbon steel, stainless steel, titanium, nickel and nickel alloy, copper and copper alloy.

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