Shell pipe threading equipment

Abstract

A shell pipe threading device includes an upper pressure component, a lower pressure component, a clamp and a fixed plate; the upper pressure component includes an upper pressure head and an upper pressure power member, the upper pressure head includes a first support frame, a first top block and a pressure plate, the first support frame is connected to the output end of the upper pressure power member, the first top block is connected to the lower side of the first support frame, and the lower end of the first top block is provided with a top push head, the pressure plate is connected to the bottom of the first support frame, the pressure plate is provided with a first vertical through groove, the first top block is arranged through the first through groove, and the lower side of the pressure plate is provided with a positioning portion; the lower pressure component includes a lower pressure head and a lower pressure power member, the lower pressure head includes a second support frame and a second top block, the upper end of the second top block is provided with a bottom push head, and the fixed plate is provided with a second vertical through groove for the second top block to pass through. The above scheme realizes the assembly between the shell and the end cover plate and the assembly between the cooling pipe and the end cover plate through a single device, has high processing efficiency, effectively reduces equipment cost, and has good practicality.

Description

Technical Field

[0001] The present invention relates to the technical field of automated processing tooling, and in particular to a shell pipe threading device. Background Art

[0002] EGR, short for Exhaust Gas Recirculation (EGR), is a system that directs a small amount of post-combustion exhaust gas into the intake line to lower the temperature in the combustion chamber and reduce the amount of nitrogen oxides in the exhaust. However, the exhaust gas exiting the cylinder is very hot, so a cooler is connected to the EGR line and coolant is introduced to lower the temperature of the exhaust gas reaching the intake line.

[0003] The EGR cooler structurally includes a single shell, two end covers, and a plurality of flat cooling pipes. The shell is a cylindrical structure with openings at both ends, and the end faces of the end covers are provided with a plurality of slots for the cooling pipes to be plugged in. During assembly, the two end covers are first assembled at the openings at both ends of the shell, and then the cooling pipes are inserted into the slots so that the cooling pipes are located between the two end covers. At this time, the cooling pipes can be assembled inside the shell in a stacked arrangement. Finally, the ends of the cooling pipes are expanded, that is, the ends of the cooling pipes are expanded so that the ends of the cooling pipes are fixed to each other with the slots of the end covers. It can be seen that the assembly of the EGR cooler involves both the assembly between the end covers and the shell, and the assembly between the cooling pipes and the end covers. Therefore, the prior art requires multiple devices to complete the above assembly, resulting in low processing efficiency and high equipment costs. Summary of the Invention

[0004] The object of the present invention is to provide a shell tube-threading device which can simultaneously complete the assembly between the end cover plate and the shell and the assembly between the cooling tube and the end cover plate.

[0005] In order to solve the above problems, the present invention provides a shell pipe threading device, comprising an upper pressing assembly, a lower pressing assembly, a clamp for limiting the shell, and a fixing plate provided below the clamp for supporting the shell;

[0006] The upper pressing assembly includes an upper pressing head located above the clamp and an upper pressing power piece for driving the upper pressing head to rise and fall, the upper pressing head includes a first supporting frame, a first pushing block and a pressing plate, the first supporting frame is connected to the output end of the upper pressing power piece, the first pushing block is connected to the lower side of the first supporting frame, and the lower end of the first pushing block is provided with a pushing head for the cooling pipe to abut, the pressing plate is connected to the lower side of the first supporting frame, the pressing plate is provided with a first vertical through slot, the first pushing block is arranged through the first through slot so that the pushing head is located below the pressing plate, and the lower side of the pressing plate is provided with a positioning portion for assembling the end cover sheet;

[0007] The down-pressing assembly includes a down-pressing head located below the fixed plate and a down-pressing power member for driving the down-pressing head to rise and fall, the down-pressing head includes a second support frame connected to the output end of the down-pressing power member and a second top block connected to the upper side of the second support frame, the second top block is arranged opposite to the first top block, the upper end of the second top block is provided with a bottom push head for the cooling pipe to abut, and the fixed plate is provided with a second through groove in the vertical direction for the second top block to pass through.

[0008] The above scheme realizes the limitation of the shell by the clamp, and when the upper pressure power member drives the upper pressure head to move downward toward the clamp, the end cover plate with the upper opening of the shell is assembled by the pressure plate, and the end cover plate with the lower opening of the shell is assembled under the support of the fixed plate; then the upper pressure power member drives the upper pressure head to reset, and the lower pressure power member pushes the lower pressure head to rise until the bottom push head at the upper end of the second top block passes upward through the shell, at which time the cooling pipe can be moved between the first top block and the second top block, and the lower end of the cooling pipe is abutted against the bottom push head, at this time the upper pressure power member drives the upper pressure head to descend again until the first top block abuts against the upper end of the cooling pipe, then the upper pressure power member and the lower pressure power member simultaneously drive the first top block and the second top block to descend, and the cooling pipe can be assembled into the inside of the shell. Compared with the existing technology, the above scheme realizes the assembly between the shell and the end cover plate and the assembly between the cooling pipe and the end cover plate through a single device, has high processing efficiency, effectively reduces equipment cost, and has good practicality.

[0009] Preferably, the pushing head includes a first expansion tube portion and a first top tube portion connected in sequence from top to bottom, and the first expansion tube portion and the first top tube portion are both conical structures with a larger top and a smaller bottom. The plane size of the top of the first expansion tube portion is larger than the inner hole size of the cooling tube, and the plane size of the top of the first top tube portion is equal to or smaller than the inner hole size of the cooling tube, so that the first top tube portion can be inserted into the cooling tube to achieve positioning of the cooling tube; and since the plane size of the top of the first expansion tube portion is larger than the inner hole size of the cooling tube, the end of the cooling tube can be expanded.

[0010] Preferably, the bottom push head includes a second expansion tube portion and a second top tube portion connected in sequence from top to bottom, the second expansion tube portion and the second top tube portion are both conical structures with a larger top and a smaller bottom, the plane size of the top of the second expansion tube portion is larger than the inner hole size of the cooling tube, and the plane size of the top of the second top tube portion is equal to or smaller than the inner hole size of the cooling tube, so that the second top tube portion can be inserted into the cooling tube to achieve positioning of the cooling tube; and since the plane size of the top of the second expansion tube portion is larger than the inner hole size of the cooling tube, the end of the cooling tube can be expanded.

[0011] Preferably, the above solution further includes a side clamp assembly provided on the side above the clamp, and the side clamp assembly is used to clamp the cooling pipe so that the cooling pipe remains above the clamp, thereby further improving the level of automation.

[0012] Preferably, the side clamping assembly includes a left clamping jaw and a right clamping jaw respectively located on the left and right sides above the clamp, and a side clamping power member for driving the left clamping jaw and the right clamping jaw to move closer to and away from each other.

[0013] Preferably, the cross-sectional shape of the second top block and the second through slot is the same, so that the second top block and the second through slot can slide and abut against each other, thereby ensuring that the lifting and lowering of the second top block is more stable.

[0014] Preferably, a vertical guide structure is provided on the lower side of the first support frame, and the pressure plate is slidably connected to the guide structure so that the pressure plate can move up and down along the guide structure. An elastic member for applying a downward thrust to the pressure plate is provided between the first support frame and the pressure plate, so that a certain buffer space is provided between the pressure plate and the first support frame to avoid damaging the shell.

[0015] Preferably, the guide structure is a sliding hole opened on the lower side of the first support frame, and a bolt is connected to the upper side of the pressure plate. The upper end of the bolt is a nut end slidingly connected to the sliding hole, and a stepped surface is provided in the sliding hole for the nut end to abut to prevent the bolt from falling out. The elastic member is a spring and is sleeved on the bolt, so that the connection between the pressure plate and the first support frame is stable.

[0016] Preferably, the cross-sectional shape of the first top block and the first through slot is the same, so that the first top block and the first through slot can slide and abut against each other, thereby ensuring that the lifting and lowering of the first top block is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axonometric diagram of a shell pipe threading device of the present invention;

[0018] Figure 2 It is a top view schematic diagram of a shell pipe threading device of the present invention;

[0019] Figure 3 For the Figure 2 Schematic cross-sectional view of the AA section line;

[0020] Figure 4 For the Figure 2 Schematic cross-sectional view of the middle BB section line a;

[0021] Figure 5 For the Figure 2 b) a cross-sectional view of the middle BB section line;

[0022] Figure 6 for Figure 4 A partial enlarged schematic diagram of the middle C area;

[0023] Figure 7 for Figure 4 A partial enlarged schematic diagram of the middle D area;

[0024] Figure 8 for Figure 5 A partial enlarged schematic diagram of the middle E area;

[0025] Figure 9 This is a cross-sectional schematic diagram of another embodiment of the upper pressure assembly of a shell pipe-threading device of the present invention (corresponding to Figure 3 ).

[0026] Description of reference numerals:

[0027] 1. Clamp; 11. Groove; 2. Upper pressure member; 3. Upper pressure head; 31. First support frame; 311. Slide hole; 32. First top block; 33. Pushing head; 331. First top tube portion; 332. First expansion tube portion; 34. Pressing plate; 341. First through groove; 342. Positioning portion; 343. Bolt; 4. Lower pressure member; 5. Lower pressure head; 51. Second support frame; 52. Second top block; 53. Bottom pushing head; 531. Second top tube portion; 532. Second expansion tube portion; 6. Fixing plate; 61. Second through groove; 7. Side clamping member; 71. Left clamping jaw; 72. Right clamping jaw; 8. Elastic member; 91. Shell; 92. End cover; 93. Cooling pipe. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should also be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, inside, and outside) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] Example 1

[0030] See also Figures 1-8 , a shell pipe threading device provided in embodiment 1 of the present invention includes an upper pressing assembly, a lower pressing assembly, a clamp 1 for limiting the shell 91, and a fixing plate 6 provided below the clamp 1 for supporting the shell 91;

[0031] The upper pressing assembly includes an upper pressing head 3 located above the clamp 1 and an upper pressing power member 2 for driving the upper pressing head 3 to move up and down. The upper pressing head 3 includes a first support frame 31, a first top block 32 and a pressing plate 34. The first support frame 31 is connected to the output end of the upper pressing power member 2, the first top block 32 is connected to the lower side of the first support frame 31, and the lower end of the first top block 32 is provided with a pushing head 33 for the cooling pipe 93 to abut, the pressing plate 34 is connected to the lower side of the first support frame 31, the pressing plate 34 is provided with a first vertical through slot 341, the first top block 32 is arranged through the first through slot 341 so that the pushing head 33 is located below the pressing plate 34, and the lower side of the pressing plate 34 is provided with a positioning portion 342 for assembling the end cover piece 92;

[0032] The down-pressing assembly includes a down-pressing head 5 located below the fixed plate 6 and a down-pressing power member 4 for driving the down-pressing head 5 to rise and fall. The down-pressing head 5 includes a second support frame 51 connected to the output end of the down-pressing power member 4 and a second top block 52 connected to the upper side of the second support frame 51. The second top block 52 is arranged opposite to the first top block 32. The upper end of the second top block 52 is provided with a bottom push head 53 for the cooling pipe 93 to abut. The fixed plate 6 is provided with a second through groove 61 in the vertical direction for the second top block 52 to pass through.

[0033] In this embodiment, the upper pressure member 2 is a pneumatic or electric cylinder, the cylinder body of which is fixed to the outside, and the output end of which is downwardly disposed. The lower pressure member 4 is a pneumatic or electric cylinder, the cylinder body of which is fixed to the outside, and the output end of which is upwardly disposed. The clamp 1 is fixedly connected to the upper side of the fixed plate 6. The side of the clamp 1 is provided with a groove 11 into which the housing 91 is inserted for position control.

[0034] In this embodiment, the pushing head 33 includes a first expansion tube portion 332 and a first top tube portion 331 connected in sequence from top to bottom. The first expansion tube portion 332 and the first top tube portion 331 are both conical structures with a larger top and a smaller bottom. The plane size of the top of the first expansion tube portion 332 is larger than the inner hole size of the cooling tube 93, and the plane size of the top of the first top tube portion 331 is equal to or smaller than the inner hole size of the cooling tube 93, so that the first top tube portion 331 can be inserted into the cooling tube 93 to achieve the positioning of the cooling tube 93; and since the plane size of the top of the first expansion tube portion 332 is larger than the inner hole size of the cooling tube 93, the end of the cooling tube 93 can be expanded. The bottom push head 53 includes a second expansion tube portion 532 and a second top tube portion 531 connected in sequence from top to bottom. The second expansion tube portion 532 and the second top tube portion 531 are both conical structures with a larger top and a smaller bottom. The plane size of the top of the second expansion tube portion 532 is larger than the inner hole size of the cooling tube 93, and the plane size of the top of the second top tube portion 531 is equal to or smaller than the inner hole size of the cooling tube 93, so that the second top tube portion 531 can be inserted into the cooling tube 93 to achieve the positioning of the cooling tube 93; and since the plane size of the top of the second expansion tube portion 532 is larger than the inner hole size of the cooling tube 93, the end of the cooling tube 93 can be expanded.

[0035] Furthermore, the above solution also includes a side clamp assembly provided on the side above the clamp 1, and the side clamp assembly is used to clamp the cooling pipe 93 so that the cooling pipe 93 remains above the clamp 1, thereby further improving the level of automation. More specifically, the side clamp assembly includes a left clamping jaw 71 and a right clamping jaw 72 located on the left and right sides above the clamp 1, respectively, and a side clamping power member 7 for driving the left clamping jaw 71 and the right clamping jaw 72 to move closer to or away from each other. The side clamping power member 7 is preferably two oppositely arranged cylinders, and the left clamping jaw 71 and the right clamping jaw 72 are respectively connected to the output ends of the two cylinders, thereby achieving the left clamping jaw 71 and the right clamping jaw 72 to move closer to or away from each other.

[0036] The specific usage of the above solution is:

[0037] S1. After pre-installing an end cover 92 at the lower opening of the shell 91, the shell 91 is moved into the fixture 1 to realize the positioning of the shell 91 and ensure that the end cover 92 at the lower side of the shell 91 is in abutment with the fixing plate 6. Subsequently, an end cover 92 is assembled on the positioning portion 342 of the pressing plate 34, and the upper pressing power member 2 is controlled to drive the upper pressing head 3 to descend, so that the end cover 92 located at the positioning portion 342 moves to the upper opening of the shell 91. As the upper pressing head 3 continues to descend, the end cover 92 at the upper and lower openings of the shell 91 will be squeezed by the pressing plate 34 and the fixing plate 6 respectively and assembled and fixed into the shell 91.

[0038] After that, the cooling tube 93 is moved between the first top block 32 and the second top block 52, and the lower end of the cooling tube 93 is sleeved on the second top tube portion 531 of the bottom push head 53. Then, the cooling tube 93 is clamped by the side clamp assembly. Then, the upper pressing power piece 2 drives the upper pressing head 3 to descend again until the first top tube portion 331 of the top push head 33 is inserted into the upper end of the cooling tube 93. At this time, the side clamp assembly is separated from the cooling tube 93. Then, the upper pressing power piece 2 and the lower pressing power piece 4 simultaneously drive the first top block 32 and the second top block 52 to descend, and the cooling tube 93 can pass through the slot of the end cover 92 and be assembled into the interior of the shell 91.

[0039] S3. When the cooling tube 93 is in place inside the shell 91, the upper pressure member 2 drives the upper pressure head 3 to further descend, and at the same time the lower pressure member 4 drives the lower pressure head 5 to rise, so that the first expansion tube portion 332 and the second expansion tube portion 532 respectively expand the upper end and the lower end of the cooling tube 93, thereby realizing the assembly and fixation of the cooling tube 93 relative to the end cover plate 92.

[0040] Compared with the prior art, the above solution realizes the assembly between the shell 91 and the end cover plate 92 and the assembly between the cooling pipe 93 and the end cover plate 92 through a single device, has high processing efficiency, effectively reduces equipment costs, and has good practicality.

[0041] Example 2

[0042] See also Figures 1-9 The second embodiment of the present invention provides a shell pipe threading device, the structure of which is basically the same as that of the first embodiment, except that:

[0043] A vertical guide structure is provided on the lower side of the first support frame 31, and the pressure plate 34 is slidably connected to the guide structure so that the pressure plate 34 can move up and down along the guide structure. An elastic member 8 for applying a downward thrust to the pressure plate 34 is provided between the first support frame 31 and the pressure plate 34, so that there is a certain buffer space between the pressure plate 34 and the first support frame 31 to avoid crushing the shell 91.

[0044] In this embodiment, the guide structure is a sliding hole 311 vertically provided on the lower side of the first support frame 31. A bolt 343 is connected to the upper side of the pressure plate 34. The upper end of the bolt 343 is a nut end that is slidably connected to the sliding hole 311. The sliding hole 311 is provided with a stepped surface for the nut end to abut against to prevent the bolt 343 from falling out. The elastic member 8 is a spring and is sleeved on the bolt 343, thereby ensuring a stable connection between the pressure plate 34 and the first support frame 31. It should be understood that the guide structure may also be of other forms. For example, in another embodiment, the vertical sliding hole 311 may be provided on the pressure plate 34, and the bolt 343 may be provided on the lower side of the first support frame 31. The sliding hole 311 of the pressure plate 34 is slidably connected to the bolt 343, and the lower end of the bolt 343 is a nut end that prevents the pressure plate 34 from falling out. The elastic member 8 is a spring and is sleeved on the bolt 343.

[0045] The first top block 32 and the first through groove 341 have the same cross-sectional shape, so that the first top block 32 and the first through groove 341 slide and abut against each other, thereby ensuring that the lifting and lowering of the first top block 32 is more stable; the second top block 52 and the second through groove 61 have the same cross-sectional shape, so that the second top block 52 and the second through groove 61 slide and abut against each other, thereby ensuring that the lifting and lowering of the second top block 52 is more stable.

[0046] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. For those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the invention.

Claims

1. A shell tube-threading device, characterized in that: It comprises an upper pressing assembly, a lower pressing assembly, a clamp (1) for limiting the position of the housing (91), and a fixing plate (6) arranged below the clamp (1) for supporting the housing (91); The upper pressing assembly comprises an upper pressing head (3) located above the clamp (1) and an upper pressing power member (2) for driving the upper pressing head (3) to rise and fall, the upper pressing head (3) comprising a first support frame (31), a first top block (32) and a pressing plate (34), the first support frame (31) being connected to the output end of the upper pressing power member (2), the first top block (32) being connected to the lower side of the first support frame (31), and the lower end of the first top block (32) being provided with a pushing head (33) for abutting the cooling pipe (93), the pressing plate (34) being connected to the lower side of the first support frame (31), the pressing plate (34) being provided with a first through slot (341) along the vertical direction, the first top block (32) being arranged through the first through slot (341) so that the pushing head (33) is located below the pressing plate (34), and the lower side of the pressing plate (34) is provided with a positioning portion (342) for assembling the end cover (92); The down-pressing assembly comprises a down-pressing head (5) located below the fixed plate (6) and a down-pressing power member (4) for driving the down-pressing head (5) to move up and down. The down-pressing head (5) comprises a second support frame (51) connected to the output end of the down-pressing power member (4) and a second top block (52) connected to the upper side of the second support frame (51). The second top block (52) is arranged opposite to the first top block (32). The upper end of the second top block (52) is provided with a bottom push head (53) for abutting the cooling pipe (93). The fixed plate (6) is provided with a second through groove (61) in the vertical direction for the second top block (52) to pass through.

2. The shell tube-threading device according to claim 1, characterized in that: The pushing head (33) includes a first expansion tube portion (332) and a first top tube portion (331) connected in sequence from top to bottom. The first expansion tube portion (332) and the first top tube portion (331) are both conical structures with a larger top and a smaller bottom. The plane size of the top of the first expansion tube portion (332) is larger than the inner hole size of the cooling tube (93), and the plane size of the top of the first top tube portion (331) is equal to or smaller than the inner hole size of the cooling tube (93).

3. A shell tube-threading device according to claim 1 or 2, characterized in that: The bottom push head (53) includes a second expansion tube portion (532) and a second top tube portion (531) connected in sequence from top to bottom. The second expansion tube portion (532) and the second top tube portion (531) are both conical structures with a larger top and a smaller bottom. The plane size of the top of the second expansion tube portion (532) is larger than the inner hole size of the cooling tube (93), and the plane size of the top of the second top tube portion (531) is equal to or smaller than the inner hole size of the cooling tube (93).

4. The shell tube threading device according to claim 1, characterized in that: It also includes a side clamp assembly arranged on the side above the clamp (1), and the side clamp assembly is used to clamp the cooling pipe (93) so that the cooling pipe (93) is kept above the clamp (1).

5. The shell tube threading device according to claim 4, characterized in that: The side clamping assembly comprises a left clamping jaw (71) and a right clamping jaw (72) respectively located on the left and right sides above the clamp (1), and a side clamping power member (7) for driving the left clamping jaw (71) and the right clamping jaw (72) to move closer to and away from each other.

6. The shell tube threading device according to claim 1, characterized in that: The cross-sectional shape of the second top block (52) and the second through groove (61) is the same, so that the second top block (52) and the second through groove (61) can slide and abut against each other.

7. The shell tube threading device according to claim 1, characterized in that: A vertical guide structure is provided on the lower side of the first support frame (31), and the pressure plate (34) is slidably connected to the guide structure so that the pressure plate (34) can move up and down along the guide structure. An elastic member (8) for applying a downward thrust to the pressure plate (34) is provided between the first support frame (31) and the pressure plate (34).

8. The shell tube threading device according to claim 7, characterized in that: The guide structure is a sliding hole (311) opened on the lower side of the first support frame (31), and a bolt (343) is connected to the upper side of the pressure plate (34). The upper end of the bolt (343) is a nut end that is slidably connected to the sliding hole (311). The sliding hole (311) is provided with a stepped surface for the nut end to abut to prevent the bolt (343) from falling out. The elastic member (8) is a spring and is sleeved on the bolt (343).

9. The shell tube threading device according to claim 7, characterized in that: The cross-sectional shape of the first top block (32) and the first through groove (341) is the same, so that the first top block (32) and the first through groove (341) can slide and abut against each other.

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