CN104475511B - A kind of bending machine shaping for nuclear power evaporator heat-transfer pipe - Google Patents

Abstract

The invention discloses a pipe bending machine for forming heat transfer tubes of nuclear power evaporators, which includes a frame, an automatic feeding device, a fixed pipe bending device, a movable pipe bending device and a material receiving support device. The fixed pipe bending device is set as a mirror image, and the material receiving support device is set on the straight line where the fixed pipe bending device and the movable pipe bending device are located; the automatic feeding device automatically feeds the steel pipe to the material receiving support device, and the fixed pipe bending device includes a The machine head and auxiliary pushing device on the frame, the auxiliary pushing device is slidably installed on the machine head along the steel pipe axis direction during pipe bending; the machine base is slidably installed on the machine head, and the main shaft is installed on the machine base; installed on the main shaft The bending wheel mold at the upper end; the pipe bending arm installed on the machine base is rotated, and the pipe bending arm is driven by the arm driving device to rotate around the main shaft; the clamping device is movably installed on the pipe bending arm. The pipe bending machine is suitable for the bending of heat transfer tubes of nuclear power evaporators. The parallelism and perpendicularity of the bent steel pipes can meet the requirements.

Description

A tube bending machine for forming heat transfer tubes of nuclear power evaporators

technical field

The invention relates to a pipe bending machine, in particular to a pipe bending machine used for forming heat transfer tubes of nuclear power evaporators.

Background technique

The heat transfer tube of the nuclear power evaporator is a U-shaped heat transfer tube. This kind of heat transfer tube needs to be bent with a tube as long as 10 meters. Due to the special environment used, the parallel sections on both sides of the U-shaped heat transfer tube The requirements for verticality and verticality between the pipes on both sides and the low section are relatively high, so the requirements for the quality of the bent pipe are very high. However, when the current common pipe bending machine bends the pipe, when the steel pipe enters the pipe bending station, the auxiliary pushing die moves to press the steel pipe, and then the pipe bending arm moves to bend the steel pipe into a specified angle. This common pipe bender can bend short steel pipes. The longer the steel pipe is, the more difficult it is to ensure parallelism and perpendicularity. It is obviously difficult for ordinary single-head pipe benders to guarantee parallelism and perpendicularity. , and for ordinary double-head pipe bending machines, since the two ends of the steel pipe cannot be positioned after the steel pipe is loaded, it cannot be guaranteed whether the two ends of the steel pipe are on the same axis when bending, so the parallelism cannot be guaranteed. and verticality.

Contents of the invention

The technical problem to be solved by the present invention is to provide a pipe bending machine for forming heat transfer tubes of nuclear power evaporators. The pipe bending device and movable pipe bending device perform double-head pipe bending, and at the same time use the auxiliary pushing device of the fixed pipe bending device to position the steel pipe to ensure the levelness of both ends of the steel pipe, and then use the movable bending wheel mold to approach the auxiliary pushing device to achieve Bend the pipe so that the parallelism and perpendicularity of the bent steel pipe can meet the requirements.

In order to solve the above technical problems, the technical solution of the present invention is: a tube bending machine for forming heat transfer tubes of nuclear power evaporators, including a frame, an automatic feeding device, a fixed tube bending device, a movable tube bending device and a material receiving device. Supporting device, the fixed pipe bending device is fixed on the frame, and the movable pipe bending device is slidably installed on the frame. The movable pipe bending device and the fixed pipe bending device are mirrored. The structure is the same, and the movable pipe bending device is driven by a linear drive device; the material receiving support device is arranged on the straight line where the fixed pipe bending device and the movable pipe bending device are located to receive and support the steel pipe; the automatic feeding device The steel pipe is automatically fed into the receiving support device. The fixed pipe bending device includes a machine head fixed on the frame and an auxiliary pushing device. The auxiliary pushing device is installed on the On the machine head; slidingly installed on the machine base on the machine head, the sliding direction of the machine base is perpendicular to the axial direction of the steel pipe, the machine base is connected with the driving device of the machine base; the main shaft installed on the machine base; installed on the upper end of the main shaft The bending wheel mold; rotate the pipe bending arm installed on the base, the pipe bending arm is driven by the arm drive device to rotate around the main shaft; the clamping device installed on the pipe bending arm is movable, and the clamping device clamps the Tighten the steel pipe.

As a preferred solution, the sliding installation between the machine base and the machine head is realized by the following structure: one side of the machine head is fixed with an upper linear guide rail and a lower linear guide rail arranged in parallel, and the The side adjacent to the machine head is fixed with a mounting plate, which is equipped with an upper slider and a lower slider that are respectively matched with the upper linear guide rail and the lower linear guide rail. Both the lower slider and the lower slider are matched by male and female.

As a preferred solution, the base driving device includes a servo motor and a ball screw mechanism, the servo motor is fixed on the machine head, the lead screw of the ball screw mechanism is installed on the machine head in rotation, and the ball screw The ball bearing of the bar is fixed on the mounting plate.

As a preferred solution, the automatic feeding device includes a feeding rack, a jacking mechanism, a jacking power device, and a material guide slope, and the number of the feeding racks is multiple and arranged in a row, each feeding The frame includes a stacking platform for stacking steel pipes and an inclined discharge platform. One-to-one correspondence with the jacking block vertically slidably installed on the fixed seat, the jacking block is located below the discharge platform, the jacking power device is connected with each jacking block through a linkage mechanism, and the jacking power The device drives the jacking block to vertically lift and push the steel pipe into the material guide slope. The material guide slope is installed between the discharge platform and the material receiving platform of the pipe bender. The lower end of the material guide slope is matched with the material receiving support device.

As a preferred solution, the linkage mechanism includes a horizontally movable connecting rod, and a cam is rotated on each fixed seat. A articulated arm is hinged between them, and the jacking power device is a cylinder, the tail of the cylinder is hinged on the cylinder seat, and the piston rod and the connecting rod of the cylinder are hinged.

As a preferred solution, the material receiving support device includes several material receiving support frames arranged in a row, the upper end surface of the material receiving support frame is provided with a material receiving groove, and the material receiving groove is matched with the material guide slope .

As a preferred solution, the linear drive device is a servo motor, and the servo motor is connected to the machine head of the movable elbow device through a screw nut mechanism.

After adopting the above technical solution, the effect of the present invention is that the pipe bending machine can slide to any position to bend the pipe by using the movable pipe bending device, and at the same time, the fixed pipe bending device and the movable pipe bending device can slide along the axis of the steel pipe by using the auxiliary pushing device Auxiliary thrusting is carried out, but the auxiliary thrusting device cannot move in other directions, while the machine base is slid and installed on the machine head along the radial direction of the steel pipe and driven by the machine base driving device, then when the steel pipe is loaded by the automatic feeding device , the two ends of the steel pipe can be positioned against the auxiliary pushing device of the fixed pipe bending device and the movable pipe bending device as a positioning surface, as long as the coaxiality of the two inner grooves of the auxiliary pushing device is ensured during debugging, the coaxiality It can be ensured, and then use the base driving device to drive the bending wheel mold close to the auxiliary pushing device and press the steel pipe tightly, so that the parallelism of the two side sections of the bent U-shaped heat transfer tube and the The perpendicularity between the end and the lower section can be guaranteed, so that this pipe bending machine can meet the requirements of nuclear power evaporator heat transfer tube forming. Of course, it is also suitable for other long-length double-ended pipes with high requirements for parallelism and verticality.

And because described base driving device comprises servomotor and ball screw mechanism, this servomotor is fixed on the machine head, the leading screw of described ball screw mechanism is installed on the machine head in rotation, and the ball sleeve of described ball screw is fixed On the mounting plate, the servo motor and ball screw mechanism can ensure smooth sliding of the machine base and precise control of the sliding position, improving the precision of pipe bending.

And because the automatic feeding device includes a feeding rack, a jacking mechanism, a jacking power device and a material guide slope, the number of the feeding racks is multiple and arranged in a row, and each feeding rack includes a A stacking platform for stacking steel pipes and an inclined discharge platform, the discharge platform is connected with the stacking platform, and the lower end of the discharge platform is provided with a material blocking step; the jacking mechanism includes several fixed seats and one-to-one correspondence Vertically slide the jacking block installed on the fixed seat, the jacking block is under the discharge platform, the jacking power device is connected with each jacking block through a linkage mechanism, and the jacking power device drives the jacking block Vertical lifting pushes the steel pipe into the material guide slope, the material guide slope is installed between the discharge platform and the material receiving platform of the pipe bender, the high end of the material guide slope cooperates with the material blocking step, and the material guide slope The low end is matched with the material receiving support device. The automatic feeding device can realize the automatic feeding of long steel pipes, improve efficiency, reduce the collision and damage to the steel pipe surface, save manpower, and use the linkage mechanism to realize the synchronization of the jacking block Jacking simplifies the structure and reduces energy consumption.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the front schematic view of the automatic feeding device of the embodiment of the present invention;

Fig. 2 is a schematic side view of an automatic feeding device according to an embodiment of the present invention;

Fig. 3 is a schematic structural view of a fixed pipe bending device according to an embodiment of the present invention;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is a top view of a pipe bender according to an embodiment of the present invention;

In the attached drawings: 1. Feeding frame; 2. Stacking platform; 3. Discharging platform; 4. Cam; 5. Rotating shaft; 6. Blocking steps; Steel pipe; 10. Fixed seat; 11. Connecting rod; 12. Cylinder; 13. Cylinder seat; 14. Machine head; 15. Machine base; 16. Main shaft; Tightening device; 20. Clamping cylinder; 21. Upper linear guide rail; 22. Base driving device; 23. Bending arm; 24. Mounting plate; 25. Lower slider; device; B. movable elbow device.

detailed description

The present invention will be described in further detail below through specific examples.

As shown in Figures 1 to 5, a tube bending machine for forming heat transfer tubes of nuclear power evaporators includes a frame, an automatic feeding device, a fixed tube bending device A, a movable tube bending device B, and a material receiving support device 8. The fixed pipe bending device A is fixed on the frame, and the movable pipe bending device B is slidably installed on the frame. The movable pipe bending device B is mirrored with the fixed pipe bending device A, and the movable pipe bending device B and The structure of the fixed pipe bend is the same, and the movable pipe bend device B is driven by a linear drive device; the material receiving support device 8 is arranged on the straight line where the fixed pipe bend device A and the movable pipe bend device B are located for receiving and supporting Steel pipe 9; the automatic feeding device automatically feeds the steel pipe 9 onto the receiving support device 8, and the fixed pipe bending device A includes a machine head 14 and an auxiliary pushing device 17 fixed on the frame. The auxiliary pushing device 17 is slidably installed on the machine head 14 along the axial direction of the steel pipe 9 during pipe bending; the machine base 15 is slidably installed on the machine head 14, and the sliding direction of the machine base 15 is perpendicular to the axial direction of the steel pipe 9. The support 15 is connected with the support driving device 22; the main shaft 16 installed on the support 15; the bending wheel mold 18 installed on the upper end of the main shaft 16; the bending arm 23 installed on the support 15 is rotated, and the bending arm 23 Driven by the arm driving device to rotate around the main shaft 16; the clamping device 19 movably installed on the pipe bending arm 23, the clamping device 19 clamps the steel pipe 9 when bending the pipe.

Wherein, the sliding installation between the machine base 15 and the machine head 14 is realized by the following structure: one side of the machine head 14 is fixed with an upper linear guide rail 21 and a lower linear guide rail 26 arranged in parallel, and the One side adjacent to the machine head 14 is fixed with a mounting plate 24, on which an upper slider and a lower slider 25 respectively matched with the upper linear guide rail 21 and the lower linear guide rail 26 are installed, the upper linear guide rail 21 Cooperate with the male and female of the upper slider, the lower linear guide rail 26 and the lower slider 25. The base driving device 22 includes a servo motor and a ball screw mechanism, the servo motor is fixed on the machine head 14, the screw of the ball screw mechanism is installed on the machine head 14 in rotation, the ball sleeve of the ball screw Fixed on the mounting plate 24.

The clamping device 19 includes a clamping seat that is movably installed, and the clamping seat is driven by a clamping oil cylinder 20. A clamping die is installed on the clamping seat. Clamping groove.

The clamping die is detachably mounted on the clamping seat, the clamping seat is provided with an adjustment seat, the back of the clamping die is provided with an adjustment rod, and the adjustment rod is slidably installed on the adjustment seat and locked by locking Nut locked.

And described auxiliary pushing device 17 then comprises an auxiliary pushing seat, and this auxiliary pushing seat side is provided with auxiliary pushing groove, and this auxiliary pushing groove is then used as the location position of steel pipe 9, and auxiliary pushing seat is installed along steel pipe 9 axial direction sliding. On the machine head 14, the auxiliary pushing seat can be driven by the auxiliary pushing seat driving device, or can be connected by a linear elastic reset device. When the steel pipe 9 is bent, the steel pipe 9 will move axially, and at this time the auxiliary pushing seat will assist in pushing the steel pipe 9 moves, after the bending is completed, after taking out the steel pipe 9, the auxiliary push seat can rely on the auxiliary push seat linear drive device to reset or the linear elastic reset device to reset.

The structure of the flexible pipe bending device B is the same as that of the fixed pipe bending device A, except that the machine head 14 of the movable pipe bending device B is installed on the frame through a set of linear guide rails, and the machine head 14 is driven by a linear The device is driven, and the linear drive device is a servo motor, and the servo motor is connected with the head 14 of the movable elbow device B through a screw nut mechanism.

As shown in Figures 1 and 2, the automatic feeding device includes a feeding rack 1, a jacking mechanism, a jacking power device and a material guide slope, and the number of the feeding racks 1 is multiple and arranged in a row, each A loading rack 1 includes a stacking platform 2 for stacking steel pipes 9 and an inclined discharge platform 3, the discharge platform 3 is connected with the stacking platform 2, and the lower end of the discharge platform 3 is provided with a material retaining step 6. The jacking mechanism includes a plurality of fixed seats 10 and one-to-one corresponding vertically slidably mounted jacking blocks 7 on the fixed seats 10, the jacking blocks 7 are located below the discharge platform 3, and the jacking power The device is connected with each jacking block 7 through a linkage mechanism. The jacking power device drives the jacking block 7 to vertically lift and push the steel pipe 9 to enter the material guide slope, and the material guide slope is installed on the discharge platform 3 and the pipe bender. Between the material receiving platforms, the inclination angle of the material guide slope is the same as the inclination angle of the discharge platform 3 . The high end of the material guide slope cooperates with the material blocking step 6 , and the low end of the material guide slope cooperates with the material receiving support device 8 .

Described linkage mechanism comprises the connecting rod 11 that horizontal activity is arranged, all rotates and installs cam 4 on each fixed seat 10, and this cam 4 cooperates with the lower end of corresponding jacking block 7, and this connecting rod 11 and the rotating shaft of each cam 4 5 are hinged with articulated arms, and the jacking power device is a cylinder 12, the tail of the cylinder 12 is hinged on the cylinder block 13, and the piston rod of the cylinder 12 is hinged with the connecting rod 11. The material receiving support device 8 includes several material receiving support frames arranged in a row, and the upper end surface of the material receiving support frame is provided with a material receiving groove, and the material receiving groove cooperates with the material guide slope.

The pipe bending machine in the present invention uses a fixed pipe bending device A and a movable pipe bending device B to realize arbitrary adjustment of the pipe bending position, firstly the movable pipe bending device B acts to bend the pipe, and then the fixed pipe bending device A acts to bend the pipe . Utilizing the positioning of the auxiliary pushing device 17 can ensure that the coaxiality of the two ends of the steel pipe 9 meets the requirements. After the coaxiality meets the requirements, the parallelism of the two ends can be ensured when the pipe is bent.

The above-described embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. On the basis of not departing from the design spirit of the present invention, any deformation and transformation made to the technical solution of the present invention shall fall within the scope of the present invention. Into the scope of protection determined by the claims of the present invention.

Claims (7)

1. one kind for the shaping bending machine of nuclear power evaporator heat-transfer pipe, it is characterized in that: comprise frame, automatic charging device, fixed bending tube device, movable bend pipe device and splicing bracing or strutting arrangement, described fixed bending tube device is fixed in frame, movable bend pipe device is slidably mounted in frame, this movable bend pipe device and fixed bending tube device mirror image are arranged, described movable bend pipe device is identical with the structure of fixed bending tube, and described movable bend pipe device is driven by linear drive apparatus; Described splicing bracing or strutting arrangement is arranged on straight line residing for fixed bending tube device and movable bend pipe device for receiving and supporting steel pipe; Steel pipe is sent on described splicing bracing or strutting arrangement by described automatic charging device automatically, and described fixed bending tube device comprises and is fixed on head in frame and auxiliary pull apparatus, and described auxiliary pull apparatus is slidably mounted on head along steel pipe axis direction during bend pipe; Be slidably mounted on the support on head, the glide direction of this support is vertical with the axial direction of steel pipe, and this support is connected with frame driving device; Be installed on the main shaft on support; Be installed on the bend wheel mould of main shaft upper end; Rotate the bending pipe arm be installed on support, this bending pipe arm is driven by arm drive unit and rotates around the spindle; Be movably installed in the clamping device on bending pipe arm, this clamping device clamps described steel pipe when bend pipe.

2. a kind of bending machine shaping for nuclear power evaporator heat-transfer pipe as claimed in claim 1, it is characterized in that: being slidably installed between described support and head is realized by following structure: the side of described head is fixed with the Linear guide rail and lower linear guide rail that be arranged in parallel, the side adjacent with head of described support is fixed with installing plate, this installing plate is provided with the top shoe and sliding block that coordinate with Linear guide rail and lower linear guide rail respectively, described Linear guide rail coordinates with top shoe, lower linear guide rail and the equal male and female of sliding block.

3. a kind of bending machine shaping for nuclear power evaporator heat-transfer pipe as claimed in claim 2, it is characterized in that: described frame driving device comprises servomotor and ball screw framework, this servomotor is fixed on head, the screw turns of described ball screw framework is installed on head, and the ball sleeve of described ball-screw is fixed on installing plate.

4. a kind of bending machine shaping for nuclear power evaporator heat-transfer pipe as claimed in claim 3, it is characterized in that: described automatic charging device comprises stock shelf, lifting body, jacking power set and guide inclined-plane, the number of described stock shelf is multiple and is arranged in a row, each stock shelf comprises one for stacking stacking platform and the discharge platform tilted of steel pipe, described discharge platform is connected with stacking platform, and the lower end edge of this discharge platform is provided with backgauge step; Described lifting body comprises several holders and one_to_one corresponding and is vertically slidably mounted on jacking block on holder, this jacking block is in the below of discharge platform, described jacking power set and each jacking block are in transmission connection by link gear, these jacking power set drive jacking block vertical lifting pushing tow steel pipe to enter guide inclined-plane, described guide inclined-plane is installed between discharge platform and the material receiving of bending machine, the high-end of this guide inclined-plane coordinates with backgauge step, and the low side on described guide inclined-plane coordinates with splicing bracing or strutting arrangement.

5. a kind of bending machine shaping for nuclear power evaporator heat-transfer pipe as claimed in claim 4, it is characterized in that: described link gear comprises the connecting rod that horizontal anomalous movement is arranged, each holder all rotates cam is installed, this cam coordinates with the lower end of corresponding jacking block, articulated jib is hinged with between the rotating shaft of this connecting rod and each cam, described jacking power set are cylinder, and the afterbody of cylinder is articulated with on cylinder block, hinged between the piston rod of this cylinder and connecting rod.

6. a kind of bending machine shaping for nuclear power evaporator heat-transfer pipe as claimed in claim 5, it is characterized in that: described splicing bracing or strutting arrangement comprises several splicing bracing frames set in a row, the upper surface of this splicing bracing frame is provided with splicing groove, and this splicing groove coordinates with guide inclined-plane.

7. a kind of bending machine shaping for nuclear power evaporator heat-transfer pipe as claimed in claim 6, it is characterized in that: described linear drive apparatus is servomotor, this servomotor is connected by the head of screw-nut body with movable bend pipe device.