Reverse bending preforming device for water collecting main pipe

Abstract

The utility model relates to the technical field of pipe fitting machining, and discloses a water collecting main pipe reverse bending preforming device which comprises a rack, two V-shaped plate frames arranged left and right are fixed to the rack, and a hydraulic jacking assembly is arranged above the two V-shaped plate frames. And the hydraulic jacking assembly comprises a liftable jacking rod. The two ends of the water collecting main pipe can be erected through the pair of V-shaped plate frames, the water collecting main pipe can be bent through the ejector rod, and the water collecting main pipe bending device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe fitting processing, and particularly relates to a reverse bending preforming device for a water collecting main pipe. Background Art

[0002] An air conditioner water collecting pipe comprises a long cylindrical water collecting main pipe with a large diameter and a plurality of copper pipes uniformly inserted and sheathed on the water collecting main pipe. The plurality of copper pipes are fixed on the water collecting main pipe by welding. During the welding process of the water collecting main pipe, due to the reasons of thermal expansion and contraction when heated, the water collecting main pipe is prone to bending, resulting in poor straightness of the whole product and affecting the product quality and aesthetics. In order to improve the product quality, before welding the water collecting main pipe, pre-pressure is applied to the opposite direction of the deformation caused by thermal expansion and contraction when heated, so that the water collecting main pipe has a certain reverse arc before welding, thereby offsetting the deformation of the water collecting main pipe during welding. Therefore, there is an urgent need for a reverse bending preforming device for the water collecting main pipe. Content of the Utility Model

[0003] The purpose of the utility model is to provide a reverse bending preforming device for a water collecting main pipe. The two ends of the water collecting main pipe can be supported by a pair of V-shaped plate frames, and the ejector rod can bend the water collecting main pipe. Moreover, its structure is simple and the operation is convenient.

[0004] The above technical purpose of the utility model is realized through the following technical solutions:

[0005] A reverse bending preforming device for a water collecting main pipe comprises a frame. Two left and right arranged V-shaped plate frames are fixed on the frame, and a hydraulic jacking assembly is arranged above the two V-shaped plate frames; the hydraulic jacking assembly includes a liftable ejector rod.

[0006] Place the water collecting main pipe to be bent on the two V-shaped plate frames, try to place it centered, and then lower the ejector rod to press the middle part of the water collecting pipe. The forming arc of the water collecting pipe is generally three-thousandths to four-thousandths of the pipe length. By preforming the reverse bending of the water collecting main pipe, the deformation generated by welding of the water collecting main pipe can be offset, so that the water collecting main pipe has better straightness after welding.

[0007] The utility model is further arranged as follows: the hydraulic jacking assembly further includes an upper support plate fixed on the frame. A hydraulic jacking housing is arranged on the upper support plate. An oil storage cavity, a piston cylinder hole and an oil through hole communicating the oil storage cavity and the piston cylinder hole are arranged in the hydraulic jacking housing; a piston is sleeved in the piston cylinder hole, and the piston is fixed at the upper end of the ejector rod;

[0008] An automatic oil inlet and outlet valve is arranged in the oil storage cavity;

[0009] A end cover is fixed to the upper end of the oil storage cavity, and the lower end of the end cover is inserted and fixed to the upper end of the valve body of the automatic oil inlet and outlet valve; a piston rod hole is formed on the end cover, a piston rod is sleeved in the piston rod hole, the upper end of the piston rod is hinged to a handle seat through a first pin, and a handle is fixed to the handle seat;

[0010] A second pin is fixed to one end of the handle seat away from the first pin, and the second pin is inserted into the waist-shaped hole of the connecting arm; the lower end of the connecting arm is hinged to a connecting block through a third pin, and the connecting block is fixedly connected to the end cover.

[0011] A stepped hole, a tapered hole and a spring hole are formed on the valve body; the lower end of the end cover is inserted and fixed into the upper large hole of the stepped hole;

[0012] A first steel ball is sleeved in the tapered hole, a first compression spring is arranged at the lower end of the first steel ball, the first compression spring is inserted into the spring hole and abuts against the hydraulic jack housing; the spring hole is communicated with an oil through hole;

[0013] An inclined valve hole communicated with the stepped hole is further formed on the valve body, a second steel ball, a second compression spring and a support sleeve are sleeved in the inclined valve hole, the second steel ball abuts against the tapered wall of the inclined valve hole, the second compression spring is clamped between the second steel ball and the support sleeve, and the support sleeve is fixed in the inclined valve hole.

[0014] When performing the bending forming work, the worker holds the handle, and the handle drives the piston rod to move up and down through the handle seat. When the piston rod moves up, the pressure in the piston rod hole becomes smaller, the second steel ball disengages from the tapered surface of the inclined valve hole, and the oil in the oil storage cavity enters the stepped hole through the inclined valve hole; then when the piston rod moves down, the piston rod presses the oil in the stepped hole downward and presses the first steel ball downward, and the oil enters the piston cylinder hole through the spring hole and the oil through hole. The oil entering the piston cylinder hole presses the piston downward, and the piston drives the ejector rod to move down to bend the middle part of the water collecting main pipe.

[0015] In actual operation, when the handle moves up and down in a cycle, the ejector rod can move down 1 mm, and the downward movement amplitude of the ejector rod is determined by the number of times the handle is cyclically lifted.

[0016] The present utility model is further arranged as: an outer wall thread is formed at the lower end of the hydraulic jack housing, and the outer wall thread is screwed onto the upper support plate;

[0017] A locking nut is screwed at the lower end of the outer wall thread.

[0018] After placing the water collecting main pipe on the V-shaped plate rack, first rotate the hydraulic jack housing. The hydraulic jack housing moves downward and abuts against the upper side wall of the water collecting main pipe through the action of the outer wall thread. At this time, the excess protruding part of the ejector rod can also be pushed upward so that the lower end surface of the ejector rod is flush with the lower end surface of the hydraulic jack housing. Then rotate the locking nut so that the locking nut presses against the upper support plate, thereby locking the hydraulic jack housing to prevent it from moving freely when the handle rotates. At the same time, the downward movement amplitude of the ejector rod can also be accurately controlled, thus ensuring the bending degree of the product.

[0019] The present utility model is further configured as: the frame includes two sets of support rods arranged front and rear; the upper support plate is connected to the upper ends of the two sets of support rods; a reinforcing block is fixed in the middle of the two sets of support rods. By providing the reinforcing block, the support rods can be prevented from deforming.

[0020] The present utility model is further configured as: a guide bushing is fixed at the bottom of the piston cylinder hole, and the ejector rod passes through the guide bushing and is arranged in clearance fit with the guide bushing. The guide bushing can guide the ejector rod to prevent it from tilting.

[0021] The prominent effect of the present utility model is:

[0022] Compared with the prior art, the two ends of the water collecting main pipe can be supported by a pair of V-shaped plate racks, and the ejector rod can bend the water collecting main pipe. Moreover, its structure is simple and the operation is convenient;

[0023] The hydraulic jack housing can be lifted and lowered, which is convenient for confirming the initial pressing position of the water collecting main pipe and improving the bending precision of the water collecting main pipe;

[0024] By pre-forming a reverse arc on the water collecting main pipe, the deformation generated during the subsequent welding of the water collecting main pipe can be offset, thereby effectively improving the product quality. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0026] Figure 2 is Figure 1 a cross-sectional view taken along A-A;

[0027] Figure 3 is Figure 1 a partial enlarged view of B.

[0028] Reference numerals: 10, frame; 101, support rod; 102, reinforcing block;

[0029] 20, V-shaped plate rack;

[0030] 30. Hydraulic jack assembly; 301. Jack rod; 302. Upper support plate; 303. Hydraulic jack housing; 304. Piston; 305. Automatic oil inlet and outlet valve; 306. End cover; 307. Piston rod; 308. First pin; 309. Handle seat; 310. Handle; 311. Second pin; 312. Connecting arm; 313. Third pin; 314. Connecting block; 315. Locking nut; 316. Guide bushing;

[0031] 3031. Oil storage cavity; 3032. Piston cylinder hole; 3033. Oil passage hole; 3034. Outer wall thread;

[0032] 3051. Valve body; 3052. First steel ball; 3053. First compression spring; 3054. Second steel ball; 3055. Second compression spring; 3056. Support sleeve;

[0033] 30511. Step hole; 30512. Taper hole; 30513. Spring hole; 30514. Oblique valve hole;

[0034] 3061. Piston rod hole;

[0035] 2121. Waist-shaped hole;

[0036] 40. Lower die holder; 401. Die groove; 402. Die hole;

[0037] 90. Main water collection pipe. Detailed implementation manners

[0038] The following combines the accompanying drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0039] The following is a reference to Figures 1 to 3 to illustrate the embodiments of the present utility model:

[0040] A pre-forming device for reverse bending of a main water collection pipe, as Figure 1 shown, includes a frame 10, two V-shaped plate frames 20 are fixed on the frame 10 and arranged left and right, and a hydraulic jack assembly 30 is provided above the two V-shaped plate frames 20; the hydraulic jack assembly 30 includes a liftable jack rod 301.

[0041] Place the main water collection pipe 90 to be bent on the two V-shaped plate frames, try to center it, and then lower the jack rod to press down on the middle of the water collection pipe. The forming arc of the water collection pipe is generally three to four thousandths of the pipe length. By pre-forming the reverse bending of the main water collection pipe, the deformation generated by welding the main water collection pipe can be offset, so that the main water collection pipe has better straightness after welding.

[0042] As Figure 1 、Figure 3 As shown, the hydraulic jack assembly 30 of this embodiment further includes an upper support plate 302 fixed to the frame 10. A hydraulic jack housing 303 is provided on the upper support plate 302. An oil storage chamber 3031, a piston cylinder hole 3032, and an oil passage hole 3033 communicating the oil storage chamber 3031 and the piston cylinder hole 3032 are provided in the hydraulic jack housing 303. A piston 304 is sleeved in the piston cylinder hole 3032, and the piston 304 is fixed to the upper end of the push rod 301.

[0043] An automatic oil inlet and outlet valve 305 is provided in the oil storage chamber 3031.

[0044] An end cover 306 is fixed to the upper end of the oil storage chamber 3031. The lower end of the end cover 306 is inserted and fixed to the upper end of the valve body 3051 of the automatic oil inlet and outlet valve 305. A piston rod hole 3061 is formed in the end cover 306. A piston rod 307 is sleeved in the piston rod hole 3061. The upper end of the piston rod 307 is hinged to a handle seat 309 through a first pin 308, and a handle 310 is fixed to the handle seat 309.

[0045] A second pin 311 is fixed to the end of the handle seat 309 away from the first pin 308. The second pin 311 is inserted into a waist-shaped hole 3121 of a connecting arm 312. The lower end of the connecting arm 312 is hinged to a connecting block 314 through a third pin 313, and the connecting block 314 is fixedly connected to the end cover 306.

[0046] A stepped hole 30511, a tapered hole 30512, and a spring hole 30513 are formed in the valve body 3051. The lower end of the end cover 306 is inserted and fixed into the upper large hole of the stepped hole 30511.

[0047] A first steel ball 3052 is sleeved in the tapered hole 30512. A first compression spring 3053 is provided at the lower end of the first steel ball 3052. The first compression spring 3053 is sleeved in the spring hole 30513 and abuts against the hydraulic jack housing 303. The spring hole 30513 is communicated with the oil passage hole 3033.

[0048] An inclined valve hole 30514 communicating with the stepped hole 30511 is further formed in the valve body 3051. A second steel ball 3054, a second compression spring 3055, and a support sleeve 3056 are sleeved in the inclined valve hole 30514. The second steel ball 3054 abuts against the tapered wall of the inclined valve hole 30514. The second compression spring 3055 is clamped between the second steel ball 3054 and the support sleeve 3056, and the support sleeve 3056 is fixed in the inclined valve hole 30514.

[0049] When performing the bending and forming work, the operator holds the handle. The handle drives the piston rod to move up and down through the handle seat. When the piston rod moves upward, the pressure in the piston rod hole becomes smaller, and the second steel ball disengages from the conical surface of the inclined valve hole. The oil in the oil storage cavity enters the stepped hole through the inclined valve hole. Then, when the piston rod moves downward, the piston rod presses the oil in the stepped hole downward and pushes the first steel ball downward. The oil enters the piston cylinder hole through the spring hole and the oil passage hole. The oil entering the piston cylinder hole pushes the piston downward, and the piston drives the ejector rod to move downward to bend the middle part of the water collecting main pipe.

[0050] In actual operation, when the handle moves up and down in a cycle, the ejector rod can move down 1 mm. The downward movement amplitude of the ejector rod is determined by the number of times the handle is cyclically lifted.

[0051] The present utility model is further arranged as follows: an outer wall thread 3034 is formed at the lower end of the hydraulic jack housing 303, and the outer wall thread 3034 is screwed onto the upper support plate 302;

[0052] A locking nut 315 is screwed at the lower end of the outer wall thread 3034.

[0053] After the water collecting main pipe is placed on the V-shaped plate frame, first rotate the hydraulic jack housing. The hydraulic jack housing moves downward and abuts against the upper side wall of the water collecting main pipe through the action of the outer wall thread. At this time, the excess extended part of the ejector rod can also be pushed upward so that the lower end surface of the ejector rod is flush with the lower end surface of the hydraulic jack housing. Then rotate the locking nut so that the locking nut presses against the upper support plate to lock the hydraulic jack housing, prevent it from freely moving when the handle rotates, and at the same time can accurately control the downward movement amplitude of the ejector rod, thereby ensuring the bending degree of the product.

[0054] As Figure 1 shown, the frame 10 of this embodiment includes two groups of support rods 101 arranged front and back; the upper support plate 302 is connected to the upper ends of the two groups of support rods 101; a reinforcing block 102 is fixed in the middle of the two groups of support rods 101. By setting the reinforcing block, the support rods can be prevented from deforming.

[0055] As Figure 1 shown, a guide bushing 316 is fixed at the bottom of the piston cylinder hole 3032 of this embodiment. The ejector rod 301 passes through the guide bushing 316 and is arranged in clearance fit with the guide bushing 316. The guide bushing can guide the ejector rod to prevent it from tilting.

[0056] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can still be made. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A water collecting main pipe reverse bending preforming device, comprising a frame (10), characterized in that: The frame (10) is fixed with two V-shaped plate frames (20) arranged on the left and right, and a hydraulic jack assembly (30) is arranged above the two V-shaped plate frames (20); the hydraulic jack assembly (30) includes a liftable jack rod (301).

2. A water collecting main pipe reverse bending preforming device according to claim 1, characterized in that: The hydraulic jack assembly (30) further comprises an upper support plate (302) fixed on the frame (10); a hydraulic jack housing (303) is provided on the upper support plate (302); an oil storage chamber (3031), a piston cylinder hole (3032), and an oil through hole (3033) connecting the oil storage chamber (3031) and the piston cylinder hole (3032) are provided in the hydraulic jack housing (303); a piston (304) is sleeved in the piston cylinder hole (3032); the piston (304) is fixed to the upper end of the jack rod (301); The oil storage chamber (3031) is provided with an automatic oil inlet and outlet valve (305); An end cover (306) is fixed to the upper end of the oil storage chamber (3031), and the lower end of the end cover (306) is inserted into and fixed to the upper end of the valve body (3051) of the automatic oil inlet and outlet valve (305); a piston rod hole (3061) is formed on the end cover (306), and a piston rod (307) is sleeved in the piston rod hole (3061); the upper end of the piston rod (307) is hinged to the handle seat (309) through a first pin (308), and a handle (310) is fixed to the handle seat (309).

3. A water collecting main pipe reverse bending preforming device according to claim 2, characterized in that: The lower end of the hydraulic top housing (303) is formed with an outer wall thread (3034), and the outer wall thread (3034) is screwed onto the upper support plate (302); A locking nut (315) is threadedly connected to the lower end of the outer wall thread (3034).

4. A water collecting main pipe reverse bending preforming device according to claim 2, characterized in that: The valve body (3051) is formed with a step hole (30511), a tapered hole (30512) and a spring hole (30513); the lower end of the end cover (306) is inserted into and fixed in the upper large hole of the step hole (30511); A first steel ball (3052) is sleeved in the tapered hole (30512), a first compression spring (3053) is provided at the lower end of the first steel ball (3052), the first compression spring (3053) is inserted into the spring hole (30513) and pressed against the hydraulic top housing (303); the spring hole (30513) is communicated with the oil through hole (3033); The valve body (3051) is also formed with an oblique valve hole (30514) which is in communication with the step hole (30511); a second steel ball (3054), a second compression spring (3055) and a support sleeve (3056) are sleeved in the oblique valve hole (30514); the second steel ball (3054) is abutted against the conical wall of the oblique valve hole (30514); the second compression spring (3055) is clamped between the second steel ball (3054) and the support sleeve (3056); and the support sleeve (3056) is fixed in the oblique valve hole (30514).

5. The water collecting main pipe reverse bending preforming device according to claim 2, characterized in that: The frame (10) comprises two groups of support rods (101) arranged front and rear; the upper support plate (302) is connected to the upper ends of the two groups of support rods (101); and a reinforcement block (102) is fixed in the middle of the two groups of support rods (101).

6. The water collecting main pipe reverse bending preforming device according to claim 2, characterized in that: A guide sleeve (316) is fixed to the bottom of the piston cylinder hole (3032), and the push rod (301) passes through the guide sleeve (316) and is arranged with a clearance fit with the guide sleeve (316).

Images