Brazing clamping device for engine oil duplex cooler

Abstract

The invention relates to the technical field of engine oil cooler machining, in particular to an engine oil duplex cooler brazing clamping device which is used for clamping an engine oil duplex cooler and comprises a connecting pipe clamping assembly, a cooler pipe supporting assembly, a cooler pipe side wall clamping assembly and a circular cover plate downward pressing assembly, and the cooler pipe supporting assembly, the cooler pipe side wall clamping assembly and the circular cover plate downward pressing assembly are arranged in pairs. The machine frame is used for installing all the components; when the engine oil duplex cooler is clamped, a cooler pipe is vertically arranged on the cooler pipe supporting assembly, the cooler pipe supporting assembly comprises a supporting plate used for supporting the bottom of the cooler pipe, and an arc-shaped abutting plate matched with the side wall of the cooler pipe in shape and used for abutting against the side wall of the cooler pipe is vertically arranged on the supporting plate. According to the invention, through the design of the supporting plate, the cooler tube, the tube core and the tube plate can be supported in the vertical direction, so that during brazing operation, brazing filler metal can fill gaps needing to be brazed under the gravity, the utilization rate of the brazing filler metal is improved, and meanwhile, the brazing difficulty is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of engine oil cooler processing, in particular to a brazing clamping device for a double engine oil cooler. Background Art

[0002] During the transportation of diesel generator sets, the lubricating oil works in the high temperature area of ​​the diesel engine, which can absorb some heat to cool the piston. However, as the temperature of the lubricating oil increases, the viscosity of the lubricating oil decreases, which will reduce the lubricating performance of the lubricating oil and easily oxidize and deteriorate. Therefore, the lubricating oil must be cooled continuously to ensure the normal operation of the diesel engine. Generally, oil coolers are divided into shell-and-tube oil coolers and plate-fin oil coolers. The different cleaning methods and heat dissipation efficiencies make the shell-and-tube and plate-fin oil coolers used in different scenarios. In order to meet better sealing requirements and prevent oil leakage or mixing of coolant and lubricating oil, the coolers are generally assembled by brazing.

[0003] The Chinese utility model patent with authorization announcement number CN202607036U discloses an oil cooler brazing clamping device, including a fixed plate, a base plate, a left clamping mechanism, a right clamping mechanism, a lower brazing plate for placing the oil cooler, and an upper brazing plate placed on the oil cooler, the base plate is fixed to the fixed plate, the lower brazing plate is placed on the base plate, the left clamping mechanism and the right clamping mechanism are clamped on the lower brazing plate and the upper brazing plate clamping the oil cooler, it also includes a positioning mechanism, a clamping mechanism and a left and a right mold mechanism matching the shape of the end of the oil cooler, the positioning mechanism, the clamping mechanism, the left and the right mold mechanisms are all connected to the fixed plate, the positioning mechanism is located below the fixed plate, the clamping mechanism is located above the fixed plate, and the left and the right mold mechanisms are located on both sides of the clamping mechanism.

[0004] However, the utility model can only be used for clamping work during brazing of a specific plate-fin type oil cooler. Figure 1 , 2 As shown, there is now a dual oil cooler, which is a tube-in-tube oil cooler with a dual structure. The dual oil cooler includes two cooler tubes, each cooler tube is provided with a plurality of tube cores for passing the oil in parallel, and the two ends of the tube core are connected by a tube sheet, and the tube sheet is a certain distance away from the two ends of the cooler tube. The two ends of the cooler tube are covered with a circular cover plate with a first circular through hole in the center, and the two cooler tubes are connected by a connecting tube. The oil circulates between the tube core, the first circular through hole and the connecting tube, and the cooler tube is filled with a cooling medium. The oil is cooled twice by two cooler tubes, which can enhance the cooling effect of the oil. The steps for brazing the dual oil cooler are:

[0005] The first step: Assemble the tube core and the tube sheets at both ends, and then use several welding points to fix the tube core and the tube sheets at both ends together.

[0006] Step 2: Insert the tube core and tube sheet into the cooler tube, and braze the gaps between the tube core and tube sheet, and between the tube sheet and cooler tube together.

[0007] Step 3: Braze the circular cover plates on both sides of the cooler tube, and braze the two cooler tubes in sequence according to the previous steps.

[0008] Step 4: Take a first circular through hole on each of the two cooler tubes, and weld the two ends of the connecting tube to the two first circular through holes respectively.

[0009] However, there are problems with the above steps except the first step: when brazing, the components of the oil cooler are prone to shaking, resulting in large tolerances, which affects the brazing effect and the sealing of the oil cooler. In the second step, when welding the gaps between the tube core and the tube sheet, and between the tube sheet and the cooler tube, the cooler tube needs to be placed horizontally for welding. The brazing material will slide vertically along the tube sheet, making welding more difficult, reducing the welding effect, and wasting the negative effects of brazing material. Summary of the invention

[0010] In order to solve the technical problem that the brazing material may slide vertically along the tube sheet, resulting in increased welding difficulty, reduced welding effect, and waste of brazing material, the present invention provides a brazing clamping device for a duplex oil cooler to solve the above-mentioned problem.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] The oil cooler of claim 1, wherein the two ends of the cooler tube are respectively covered with a circular cover plate with a first circular through hole in the center, and a first circular through hole is taken from each of the two cooler tubes for connection through a connecting tube; the device comprises a connecting tube clamping assembly and a cooler tube support assembly arranged in pairs, a cooler tube side wall clamping assembly and a circular cover plate pressing assembly, and the device also comprises a frame for mounting the above-mentioned components; when the oil cooler is clamped, the cooler tube is vertically arranged on the cooler tube support assembly, the cooler tube support assembly comprises a support plate for supporting the bottom of the cooler tube, and an arc-shaped abutting plate for abutting the side wall of the cooler tube that matches the shape of the side wall of the cooler tube is vertically arranged on the support plate; the cooler tube side wall clamping assembly is used to clamp the side wall of the cooler tube; the circular cover plate pressing assembly is used to abut the circular cover plate from above; the connecting tube clamping assembly is used to clamp the connecting tube.

[0013] As a preferred solution of the present invention, a second circular through hole concentric with the arc-shaped abutment plate is opened on the support plate, and the radius of the second circular through hole is smaller than the radius of the arc-shaped abutment plate; a cylinder is vertically arranged below the second circular through hole, and a circular tube sheet support plate is installed on the output end of the cylinder, the tube sheet support plate is parallel to the support plate, and the projection of the tube sheet support plate on the support plate is surrounded by the second circular through hole.

[0014] As a preferred solution of the present invention, weight-reducing holes are provided on the tube sheet support plate.

[0015] As a preferred solution of the present invention, the cooler tube side wall clamping assembly includes a fixed half ring fixedly mounted on the frame, and the fixed half ring matches the shape of the side wall of the cooler tube; the cooler tube side wall clamping assembly also includes a rotating half ring hinged on the frame, and the rotating half ring matches the shape of the side wall of the cooler tube; when the cooler tube is placed on the support plate, the fixed half ring fits the side wall of the cooler tube, and the rotating half ring can be rotated to a position that fits the side wall of the cooler tube.

[0016] As a preferred solution of the present invention, a fixing pin is provided on the rotating half ring, and when the rotating half ring rotates to a position abutting against the side wall of the cooler tube, the rotating half ring can be fixed to the frame by the fixing pin.

[0017] As a preferred solution of the present invention, the circular cover plate pressing assembly includes a rotating pressing cylinder fixedly mounted on a frame, and a pressing plate is mounted on the output end of the rotating pressing cylinder. When the circular cover plate is installed on the cooler tube but the connecting tube is not installed, the rotating pressing cylinder can drive the pressing plate to move to a position against the circular cover plate.

[0018] As a preferred solution of the present invention, a circular protrusion is provided below the lower pressing plate, and when the rotating pressing cylinder drives the lower pressing plate to move to a position against the circular cover plate, the circular protrusion is inserted into the first circular through hole.

[0019] As a preferred solution of the present invention, the connecting pipe clamping assembly includes a pressing clamp. When the connecting pipe is installed on the cooler pipe, the pressing clamp can be driven to clamp the connecting pipe between the output end of the pressing clamp and the frame.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, by designing a support plate with a second circular through hole, a cylinder is used to drive the tube sheet support plate to press against the tube core and the tube sheet, so that the cooler tube, the tube core and the tube sheet can be supported in the vertical direction, so that during the brazing operation, the vertical cooler tube can be brazed directly, and the brazing material will fill the gap to be welded under gravity, thereby improving the utilization rate of the brazing material and reducing the difficulty of brazing the cooler tube, the tube core and the tube sheet.

[0022] 2. In the present invention, by providing the fixed half ring and the rotating half ring, the cooler tube can be fixed from the side to prevent the cooler tube from falling over.

[0023] 3. In the present invention, the circular cover plate can be fixed on the cooler tube by designing a lower pressure plate with a circular protrusion, thereby improving the reliability of the brazing operation; at the same time, the setting of the rotating lower pressure cylinder can prevent the lower pressure plate from blocking operations such as the removal of the cooler tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of a dual oil cooler;

[0025] Figure 2 It is a three-dimensional cross-sectional schematic diagram of a cooler pipe of a dual oil cooler and a circular cover plate installed thereon;

[0026] Figure 3 It is a three-dimensional schematic diagram of the present invention when clamping the dual oil cooler;

[0027] Figure 4 It is a three-dimensional schematic diagram of a group of cooler tube support components, cooler tube side wall clamping components, circular cover plate pressing components and a cooler tube placed thereon according to the present invention;

[0028] Figure 5 A three-dimensional schematic diagram of a set of cooler tube support components, cooler tube side wall clamping components and circular cover plate pressing components of the present invention Figure 1 ;

[0029] Figure 6 A three-dimensional schematic diagram of a set of cooler tube support components, cooler tube side wall clamping components and circular cover plate pressing components of the present invention Figure 2 .

[0030] In the figure: 100, oil duplex cooler; 110, cooler tube; 111, tube core; 112, tube sheet; 120, circular cover plate; 121, first circular through hole; 130, connecting tube; 200, frame; 300, cooler tube support assembly; 310, support plate; 311, second circular through hole; 312, arc-shaped abutment plate; 320, cylinder; 330, tube sheet support plate; 331, weight reduction hole; 400, cooler tube side wall clamping assembly; 410, fixed semi-ring; 420, rotating semi-ring; 430, fixed latch; 500, circular cover plate pressing assembly; 510, rotating pressing cylinder; 520, pressing plate; 521, circular protrusion; 600, connecting tube clamping assembly; 610, pressing clamp. DETAILED DESCRIPTION

[0031] 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, rather than all 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.

[0032] See also Figure 3-6 A brazing clamping device for a double oil cooler is shown, and Figure 1-2 The oil duplex cooler shown. A brazing clamping device for a oil duplex cooler is used to clamp the oil duplex cooler 100. The oil duplex cooler 100 includes two cooler tubes 110 parallel to each other. Both ends of the cooler tubes 110 are respectively covered with a circular cover plate 120 with a first circular through hole 121 in the center. One first circular through hole 121 is taken from each of the two cooler tubes 110 and connected through a connecting tube 130. The device includes a connecting tube clamping assembly 600 and a cooler tube support assembly 300 arranged in pairs, a cooler tube side wall clamping assembly 400 and a circular cover plate pressing assembly 500. The device also includes a connecting tube clamping assembly 600 for installing the above components. Frame 200; when the oil duplex cooler 100 is clamped, the cooler tube 110 is vertically arranged on the cooler tube support assembly 300, and the cooler tube support assembly 300 includes a support plate 310 for supporting the bottom of the cooler tube 110, and an arc-shaped abutment plate 312 that matches the shape of the side wall of the cooler tube 110 and is used to abut the side wall of the cooler tube 110 is vertically arranged on the support plate 310; the cooler tube side wall clamping assembly 400 is used to clamp the side wall of the cooler tube 110; the circular cover plate pressing assembly 500 is used to abut the circular cover plate 120 from above; the connecting pipe clamping assembly 600 is used to clamp the connecting pipe 130.

[0033] Specifically, when the tube core 111 and the tube sheet 112 need to be welded in the cooler tube 110 , the vertically arranged cooler tube 110 can prevent the solder from slipping, so that the solder is evenly filled in the gaps between the tube core 111 and the tube sheet 112 , and between the cooler tube 110 and the tube sheet 112 .

[0034] More specifically, the arc-shaped abutment plate 312 is provided to position the cooler tube 110 so that the various components on the dual oil cooler 100 can accurately enter the clamping range of the cooler tube support assembly 300, the cooler tube side wall clamping assembly 400, the circular cover plate pressing assembly 500 and the connecting pipe clamping assembly 600.

[0035] A set of cooler tube support assembly 300 , cooler tube side wall clamping assembly 400 and circular cover plate pressing assembly 500 is used to clamp a cooler tube 110 and its corresponding circular cover plate 120 .

[0036] A second circular through hole 311 is formed on the support plate 310 and is concentric with the arc-shaped abutment plate 312. The radius of the second circular through hole 311 is smaller than the radius of the arc-shaped abutment plate 312. A cylinder 320 is vertically arranged below the second circular through hole 311. A circular tube sheet support plate 330 is installed on the output end of the cylinder 320. The tube sheet support plate 330 is parallel to the support plate 310. The projection of the tube sheet support plate 330 on the support plate 310 is surrounded by the second circular through hole 311.

[0037] Specifically, the cylinder 320 is used to drive the tube sheet support plate 330 into the cooler tube 110. When the assembled tube core 111 and the tube sheets 112 at both ends that have been fixed by welding points are inserted into the cooler tube 110, the tube sheet support plate 330 can support the tube sheet 112 and the tube core 111 at the bottom, so that the tube core 111 and the tube sheet 112 will not continue to slide downward, so as to fix the position of the tube core 111 and the tube sheet 112 in the cooler tube 110, so that the brazing operation can be carried out normally and the accuracy during the brazing operation can be improved.

[0038] The tube sheet support plate 330 is provided with weight-reducing holes 331 .

[0039] Specifically, the weight-reducing holes 331 can reduce the weight of the tube sheet support plate 330 and reduce the load of the cylinder 320 .

[0040] The cooler tube side wall clamping assembly 400 includes a fixed half ring 410 fixedly mounted on the frame 200, and the fixed half ring 410 matches the side wall shape of the cooler tube 110; the cooler tube side wall clamping assembly 400 also includes a rotating half ring 420 hinged on the frame 200, and the rotating half ring 420 matches the side wall shape of the cooler tube 110; when the cooler tube 110 is placed on the support plate 310, the fixed half ring 410 fits the side wall of the cooler tube 110, and the rotating half ring 420 can be rotated to a position that fits the side wall of the cooler tube 110.

[0041] Specifically, by disposing the fixed half ring 410 and the rotating half ring 420 , the side wall of the cooler tube 110 can be clamped to prevent the cooler tube 110 from falling over.

[0042] A fixing pin 430 is provided on the rotating half ring 420 . When the rotating half ring 420 rotates to a position in contact with the side wall of the cooler pipe 110 , the rotating half ring 420 can be fixed to the rack 200 through the fixing pin 430 .

[0043] The circular cover pressing assembly 500 includes a rotating pressing cylinder 510 fixedly mounted on the frame 200, and a pressing plate 520 is mounted on the output end of the rotating pressing cylinder 510. When the circular cover 120 is installed on the cooler tube 110 but the connecting tube 130 is not installed, the rotating pressing cylinder 510 can drive the pressing plate 520 to move to a position against the circular cover 120.

[0044] Specifically, by rotating the downward pressure cylinder 510 to drive the downward pressure plate 520 to press against the circular cover plate 120, the circular cover plate 120 can be pressed against the cooler tube 110 from above to fix the circular cover plate 120. When the circular cover plate 120 is brazed, the circular cover plate 120 is prevented from shaking, thereby reducing the difficulty of brazing.

[0045] The setting of the rotating pressing cylinder 510 can enable the lower pressing plate 520 to move to a position not above the cooler tube 110 when the lower pressing plate 520 is not in operation, so as to prevent the cooler tube 110 from being blocked from being taken out.

[0046] A circular protrusion 521 is provided below the lower pressing plate 520 . When the rotating pressing cylinder 510 drives the lower pressing plate 520 to move to a position against the circular cover plate 120 , the circular protrusion 521 is inserted into the first circular through hole 121 .

[0047] Specifically, the circular cover plate 120 can be further fixed by inserting the circular protrusion 521 into the first circular through hole 121. Here, the circular protrusion 521 plays a limiting role, so that the position of the first circular through hole 121 is limited by the circular protrusion 521, so that the circular cover plate 120 will not deviate from the cooler tube 110, ensuring the fixation of the circular cover plate 120 during the brazing operation.

[0048] The connecting pipe clamping assembly 600 includes a pressing clamp 610 . When the connecting pipe 130 is installed on the cooler pipe 110 , the pressing clamp 610 can be driven to clamp the connecting pipe 130 between the output end of the pressing clamp 610 and the frame 200 .

[0049] The working and use steps of the present invention are as follows:

[0050] Step 1: Place a cooler tube 110 vertically on a support plate 310 , with the arc-shaped abutment plate 312 against the side wall of the cooler tube 110 , rotate the rotating half ring 420 so that the rotating half ring 420 and the fixed half ring 410 clamp the cooler tube 110 , and fix the rotating half ring 420 with the fixing pin 430 .

[0051] Step 2: Insert the assembled tube core 111 and tube sheet 112 fixed by welding points into the cooler tube 110. The cylinder 320 drives the tube sheet support plate 330 to press against the tube sheet 112 below. The staff uses brazing technology to seal the gap between the upper tube core 111 and the tube sheet 112, and the gap between the tube sheet 112 and the cooler tube 110.

[0052] Step 3: Cover the cooler tube 110 with a circular cover plate 120, rotate the downward pressure cylinder 510 to drive the rotating half ring 420 to press the circular cover plate 120, and then the staff uses brazing technology to braze the circular cover plate 120 on the cooler tube 110, and then rotate the downward pressure cylinder 510 to drive the lower pressure plate 520 to retract.

[0053] Step 4: Pull out the fixing pin 430, and the cylinder 320 drives the tube sheet support plate 330 to retract; flip the cooler tube 110 obtained in the first, second and third steps, and change the vertical surface of the cooler tube 110 to face upward; the cylinder 320 does not work anymore, and the components except the cylinder 320 repeat the first, second and third steps, so that the gaps between the tube core 111, the tube sheet 112 and the cooler tube 110 are brazed and sealed, and the circular cover plates 120 are brazed on both sides of the cooler tube 110.

[0054] Step 5: Place another cooler tube 110 vertically on another support plate 310, repeat steps 1, 2, 3, and 4, and braze another cooler tube 110; then align the two ends of the connecting tube 130 with the two first circular through holes 121 facing upward, use the pressing clamp 610 to clamp the connecting tube 130 between the output end of the pressing clamp 610 and the frame 200, and then the staff brazes the connecting tube 130 to the two first circular through holes 121. The brazing of the oil duplex cooler is completed.

[0055] Among them, in the fourth step, since one end of the tube core 111, the tube sheet 112 and the cooler tube 110 has been welded, the positions of the tube core 111, the tube sheet 112 and the cooler tube 110 are relatively fixed. When the cooler tube 110 is turned over, the tube core 111 and the tube sheet 112 will not be shifted in position, and the subsequent brazing operation can be carried out normally.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brazing clamping device for a double oil cooler, characterized in that: Used for clamping a dual oil cooler (100), the dual oil cooler (100) comprising two parallel cooler tubes (110), both ends of the cooler tubes (110) are respectively covered with a circular cover plate (120) with a first circular through hole (121) in the center, and one of the first circular through holes (121) is taken from each of the two cooler tubes (110) and connected through a connecting tube (130); it comprises a connecting tube clamping assembly (600) and a cooler tube support assembly (300) arranged in pairs, a cooler tube side wall clamping assembly (400) and a circular cover plate pressing assembly (500), and also comprises a frame (200) for mounting the above-mentioned components; when the dual oil cooler (10 0), when clamping, the cooler tube (110) is vertically arranged on the cooler tube support assembly (300), and the cooler tube support assembly (300) includes a support plate (310) for supporting the bottom of the cooler tube (110), and an arc-shaped abutment plate (312) that matches the shape of the side wall of the cooler tube (110) and is used to abut the side wall of the cooler tube (110) is vertically arranged on the support plate (310); the cooler tube side wall clamping assembly (400) is used to clamp the side wall of the cooler tube (110); the circular cover plate pressing assembly (500) is used to abut the circular cover plate (120) from above; and the connecting tube clamping assembly (600) is used to clamp the connecting tube (130).

2. The brazing clamping device for a dual oil cooler according to claim 1 is characterized in that: The support plate (310) is provided with a second circular through hole (311) which is concentric with the arc-shaped abutment plate (312), and the radius of the second circular through hole (311) is smaller than the radius of the arc-shaped abutment plate (312); a cylinder (320) is vertically arranged below the second circular through hole (311), and a circular tube sheet support plate (330) is installed on the output end of the cylinder (320); the tube sheet support plate (330) is parallel to the support plate (310), and the projection of the tube sheet support plate (330) on the support plate (310) is surrounded by the second circular through hole (311).

3. The brazing clamping device for a dual oil cooler according to claim 2 is characterized in that: The tube sheet support plate (330) is provided with weight-reducing holes (331).

4. The brazing clamping device for a dual oil cooler according to claim 1, characterized in that: The cooler tube side wall clamping assembly (400) comprises a fixed half ring (410) fixedly mounted on the frame (200), and the fixed half ring (410) matches the shape of the side wall of the cooler tube (110); the cooler tube side wall clamping assembly (400) further comprises a rotating half ring (420) hinged on the frame (200), and the rotating half ring (420) matches the shape of the side wall of the cooler tube (110); when the cooler tube (110) is placed on the support plate (310), the fixed half ring (410) fits the side wall of the cooler tube (110), and the rotating half ring (420) can be rotated to a position where it fits the side wall of the cooler tube (110).

5. The brazing clamping device for a dual oil cooler according to claim 4 is characterized in that: The rotating half ring (420) is provided with a fixing pin (430). When the rotating half ring (420) is rotated to a position in contact with the side wall of the cooler tube (110), the rotating half ring (420) can be fixed to the frame (200) through the fixing pin (430).

6. The brazing clamping device for a dual oil cooler according to claim 1, characterized in that: The circular cover plate pressing assembly (500) comprises a rotating pressing cylinder (510) fixedly mounted on a frame (200), a pressing plate (520) being mounted on the output end of the rotating pressing cylinder (510), and when the circular cover plate (120) is mounted on the cooler tube (110) but the connecting tube (130) is not mounted, the rotating pressing cylinder (510) can drive the pressing plate (520) to move to a position against the circular cover plate (120).

7. The brazing clamping device for a dual oil cooler according to claim 6, characterized in that: A circular protrusion (521) is provided below the lower pressing plate (520), and when the rotating pressing cylinder (510) drives the lower pressing plate (520) to move to a position against the circular cover plate (120), the circular protrusion (521) is inserted into the first circular through hole (121).

8. The brazing clamping device for a dual oil cooler according to claim 1, characterized in that: The connecting pipe clamping assembly (600) comprises a pressing clamp (610) which can be driven to clamp the connecting pipe (130) between the output end of the pressing clamp (610) and the frame (200) when the connecting pipe (130) is installed on the cooler pipe (110).

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