CN111531491A

CN111531491A - Clamping device for petroleum machinery workpiece and clamping method thereof

Info

Publication number: CN111531491A
Application number: CN202010492778.4A
Authority: CN
Inventors: 何小艳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-08-14

Abstract

The invention discloses a clamping device for petroleum machinery workpieces and a clamping method thereof, the clamping device comprises a bottom plate, two support plates are symmetrically and fixedly connected at the middle part of the upper surface of the bottom plate, a first sliding groove is formed at one adjacent side of the two support plates, a first sliding block is connected at the inner side wall of the two first sliding grooves in a sliding manner, a first electric push rod is fixedly connected at one adjacent side of the two first sliding blocks through screws, and a first fixing plate is fixedly connected at the output end of the two first electric push rods. The application range is wide, the operation is simple, the use is convenient, and the labor intensity of workers is saved.

Description

Clamping device for petroleum machinery workpiece and clamping method thereof

Technical Field

The invention relates to the technical field of petroleum machinery workpiece clamping, in particular to a clamping device for a petroleum machinery workpiece and a clamping method thereof.

Background

Petroleum, one of the main objects of geological exploration, is a viscous, dark brown liquid, known as "industrial blood". The upper part of the crust has oil storage. The main component is a mixture of various alkanes, cycloalkanes and aromatics. Petroleum is mainly used as fuel oil, gasoline and some chemical industry products, with the continuous development of times, automobile users are more and more, the consumption of the petroleum is continuously increased, the number of petroleum exploration and exploitation machines is continuously increased, and when the exploration and exploitation operations are carried out, some workpieces need to be clamped for replacement and use.

The existing clamping device for the petroleum machinery workpiece is inconvenient to move the petroleum machinery workpiece to the clamping device for clamping and fixing when clamping some heavier petroleum machinery workpieces in the clamping process, the labor intensity of workers is increased, meanwhile, the petroleum machinery workpieces are mostly in irregular shapes when clamping, when the petroleum machinery workpieces are clamped, the contact area with the clamping device is small, the clamping and fixing of the petroleum machinery workpieces are unstable, the petroleum machinery workpieces are easy to loosen when clamping, the exploration and exploitation operation of petroleum is influenced, the existing clamping device is a special-shaped clamping mechanism designed for a special workpiece outline structure, but the robustness is poor when the clamping device is used for clamping operation of various sizes and types of equipment, various clamping heads need to be designed and prepared, and extra repeated assembly time is needed when the cost is increased, therefore, the clamping device for the petroleum machinery workpiece and the clamping method thereof are provided.

Disclosure of Invention

The present invention is directed to a clamping device for a petroleum machine workpiece and a clamping method thereof, so as to solve the problems of the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a clamping device for petroleum machinery workpieces comprises a bottom plate, wherein two supporting plates are symmetrically and fixedly connected to the middle of the upper surface of the bottom plate, first sliding grooves are formed in two adjacent sides of the two supporting plates, first sliding blocks are slidably connected to the inner side walls of the two first sliding grooves, first electric push rods are fixedly connected to two adjacent sides of the first sliding blocks through screws, first fixing plates are fixedly connected to the output ends of the two first electric push rods, a shell is uniformly and fixedly connected to one adjacent side of the two first fixing plates, a sleeve is slidably connected to the inner side walls of the shell, one end of the sleeve is fixedly connected with a second fixing plate, a sleeve ring is fixedly connected to the outer side wall of the sleeve, a first rod body is slidably connected to the inner side walls of the sleeve, and one end of the first rod body is fixedly connected with the shell, the outer side wall of the first rod body is sleeved with a first spring, the upper surfaces of the two first fixing plates are fixedly connected with first fixing blocks, the tops of the two first fixing blocks are fixedly connected with a third fixing plate and a fourth fixing plate respectively, the upper surface of the third fixing plate is provided with a second chute, the inner side wall of the second chute is in sliding connection with the fourth fixing plate, the upper surface of the fourth fixing plate is hinged with a first plate body, the upper surface of the fourth fixing plate is provided with a first groove, one side of the first plate body is fixedly connected with a second spring, one end of the second spring is fixedly connected with the first groove, the upper surface of the fourth fixing plate is fixedly connected with a second plate body, one side of the third fixing plate is hinged with a fifth fixing plate, the lower surface of the fifth fixing plate is uniformly provided with a second groove, and one side of the fifth fixing plate is hinged with a female buckle, a sub-buckle is fixedly connected with one side of the third fixing plate, the female buckle is clamped with the sub-buckle, a third groove is arranged on the upper surface of the bottom plate, two sides of the inner side wall of the third groove are respectively provided with a guide groove, the guide grooves are communicated with the third groove, the inner side walls of the two guide grooves are respectively connected with a third plate body in a sliding way, one adjacent side of the two third plate bodies is fixedly connected with a sixth fixing plate, four guide wheels are fixedly connected at four mutually symmetrical corners at the bottom of the sixth fixing plate through screws, the upper surface of the sixth fixing plate is fixedly connected with an air cylinder through a screw, the output end of the air cylinder is fixedly connected with a seventh fixing plate, the equal fixedly connected with L shaped plate in front surface and the rear surface of seventh fixed plate, two one side that the L shaped plate is adjacent all is through screw fixedly connected with second electric putter, two the equal fixedly connected with eighth fixed plate of second electric putter's output.

As further preferable in the present technical solution: threaded through holes are uniformly formed in the front surface and the rear surface of the supporting plate, bolts are connected to the inner side wall of each threaded through hole in a threaded mode, and the bolts penetrate through the first sliding blocks.

As further preferable in the present technical solution: two fourth plate bodies of upper surface symmetry fixedly connected with of bottom plate, two the upper surface of fourth plate body all articulates there is the fifth plate body, two the equal sliding connection of inside wall of fifth plate body has the second body of rod, four first through-holes have been seted up to the upper surface symmetry of sixth fixed plate, the inside wall of first through-hole with the second body of rod sliding connection.

As further preferable in the present technical solution: the upper surface fixed connection of bottom plate has the switch box, the internally mounted of switch box has the switch group, one side of switch box articulates there is the box door, the electrical output of switch group pass through the wire respectively with the electrical input electric connection of first electric putter, second electric putter and cylinder.

As further preferable in the present technical solution: the equal symmetrical two ninth fixed plates of fixedly connected with in both sides of bottom plate, four the equal threaded connection of inside wall of ninth fixed plate has the threaded rod, the top fixedly connected with knob of threaded rod, the bottom of threaded rod is rotated through the bearing and is connected with the foot stool, the mutual symmetry in bottom four corners of bottom plate all is through four universal wheels of screw fixedly connected with.

As further preferable in the present technical solution: the upper surface of bottom plate articulates there is the sixth plate body, the rear surface welding of sixth plate body has the handle.

The invention also provides a clamping method of the clamping device for the petroleum machinery workpiece by using the device, which comprises the following steps:

s1, moving the device to a use area through a universal wheel, rotating a knob to rotate a threaded rod according to the terrain of the use area, enabling the position of a foot seat to approach the ground until the foot seat is in contact with the ground to provide support for the device, wherein the threaded rod is rotatably connected with the foot seat through a bearing, and only drives the foot seat to move and not rotate in the rotating process of the threaded rod;

s2, the sixth fixing plate is moved in the third groove by the guide wheel, and the sixth fixing plate drives the third plate to slide in the guide groove, the second rod is inserted into the first through hole of the sixth fixing plate close to the sixth plate, fixing the position of the sixth fixing plate, moving the petroleum mechanical workpiece to the seventh fixing plate by a hoisting tool, starting the switch group, starting the second electric push rod, the petroleum mechanical workpiece is extruded and fixed through the eighth fixing plate, the switch group is started, the air cylinder is started, the proper clamping height of the petroleum mechanical workpiece on the seventh fixing plate is adjusted, then, the second rod body is pulled out of the first through hole, the sixth fixing plate is pushed until the rear surface of the sixth fixing plate is contacted with the third groove, the second rod body is inserted into the first through hole far away from the sixth plate body, and the position of the sixth fixing plate is fixed;

s3, starting a switch group, starting a first electric push rod, extruding and fixing the petroleum mechanical workpiece through a second fixing plate, enabling the second fixing plate to slide on the outer side wall of a first rod body by a sleeve according to the size of the petroleum mechanical workpiece, simultaneously extruding a first spring by a sleeve ring, enabling a fourth fixing plate to slide on a second sliding groove, clamping the first plate into a corresponding second groove on a fifth fixing plate, limiting the position of the first plate by the second plate, and when the petroleum mechanical workpiece is taken down, releasing the clamping connection of a female buckle and a male buckle, and releasing the first plate from the second groove;

s4, according to different clamping conditions of the petroleum mechanical workpiece, the sixth fixing plate is taken down from the third groove, the sixth plate body is hinged with the bottom plate to cover the third groove, the first sliding block slides in the supporting plate, the position of the first sliding block is limited by inserting a bolt into the threaded through hole, and the height of the first fixing plate is adjusted.

As further preferable in the present technical solution: the box door is opened before the switch group is opened, and the box door is closed after the switch group is used.

Compared with the prior art, the invention has the beneficial effects that: 1. when the device is used, the sixth fixing plate is matched with the guide wheel to move in the third groove, so that some heavier petroleum mechanical workpieces can be conveniently and fixedly clamped, meanwhile, the sleeve is pushed by the second fixing plate, and the size of the petroleum mechanical workpieces is adapted by the arrangement of extruding the first spring by the sleeve ring; 2. the petroleum mechanical workpiece is fixed by the reverse thrust of the first spring, the fourth fixing plate slides in the second sliding groove, and the first plate body is clamped with the second groove to fix the positions of the two first fixing plates, so that the petroleum mechanical workpiece is clamped more stably, the clamping effect is good, the application range is wide, the operation is simple, the use is convenient, and the labor intensity of workers is reduced; 3. the invention adopts the clamping heads with the same structure to realize the clamping of workpieces of different workpiece contour mechanisms.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a base plate according to the present invention;

FIG. 3 is a schematic structural view of a third fixing plate according to the present invention;

FIG. 4 is a schematic structural view of a fourth fixing plate according to the present invention;

FIG. 5 is a schematic structural view of the housing of the present invention;

FIG. 6 is a schematic view of the structure of the support plate of the present invention;

fig. 7 is a schematic structural diagram of the switch box of the present invention.

In the figure: 1. a base plate; 2. a support plate; 3. a first chute; 4. a first slider; 5. a first electric push rod; 6. a first fixing plate; 7. a housing; 8. a sleeve; 9. a second fixing plate; 10. a first rod body; 11. a first spring; 12. a collar; 13. a first fixed block; 14. a third fixing plate; 15. a fourth fixing plate; 16. a second chute; 17. a first plate body; 18. a first groove; 19. a second spring; 20. a second plate body; 21. a fifth fixing plate; 22. a second groove; 23. a female buckle; 24. a sub-buckle; 25. a third groove; 26. a guide groove; 27. a third plate body; 28. a sixth fixing plate; 29. a guide wheel; 30. a cylinder; 31. a seventh fixing plate; 32. an L-shaped plate; 33. a second electric push rod; 34. an eighth fixing plate; 35. a threaded through hole; 36. a bolt; 37. a fourth plate body; 38. a fifth plate body; 39. a second rod body; 40. a first through hole; 41. a universal wheel; 42. a ninth fixing plate; 43. a threaded rod; 44. a knob; 45. a foot seat; 46. a switch box; 47. a switch group; 48. a box door; 49. a sixth plate body; 50. a handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-7, the present invention provides a technical solution: a clamping device for petroleum machinery workpieces comprises a bottom plate 1, two supporting plates 2 are symmetrically and fixedly connected in the middle of the upper surface of the bottom plate 1, first sliding grooves 3 are formed in adjacent sides of the two supporting plates 2, first sliding blocks 4 are connected to inner side walls of the two first sliding grooves 3 in a sliding mode, first electric push rods 5 are fixedly connected to adjacent sides of the two first sliding blocks 4 through screws, first fixing plates 6 are fixedly connected to output ends of the two first electric push rods 5, a shell 7 is fixedly connected to adjacent sides of the two first fixing plates 6 in a sliding mode, a sleeve 8 is connected to the inner side wall of the shell 7 in a sliding mode, a second fixing plate 9 is fixedly connected to one end of the sleeve 8, a lantern ring 12 is fixedly connected to the outer side wall of the sleeve 8, a first rod body 10 is connected to the inner side wall of the sleeve 8 in a sliding mode, one end of the first rod body 10 is fixedly connected with the shell, the upper surfaces of the two first fixing plates 6 are fixedly connected with first fixing blocks 13, the tops of the two first fixing blocks 13 are fixedly connected with a third fixing plate 14 and a fourth fixing plate 15 respectively, the upper surface of the third fixing plate 14 is provided with a second sliding chute 16, the inner side wall of the second sliding chute 16 is in sliding connection with the fourth fixing plate 15, the upper surface of the fourth fixing plate 15 is hinged with a first plate body 17, the upper surface of the fourth fixing plate 15 is provided with a first groove 18, one side of the first plate body 17 is fixedly connected with a second spring 19, one end of the second spring 19 is fixedly connected with the first groove 18, the upper surface of the fourth fixing plate 15 is fixedly connected with a second plate body 20, one side of the third fixing plate 14 is hinged with a fifth fixing plate 21, the lower surface of the fifth fixing plate 21 is uniformly provided with a second groove 22, one side of the fifth fixing plate 21 is hinged with a female buckle 23, one side of the third fixing plate, female knot 23 and son 24 joint, third recess 25 has been seted up to bottom plate 1's upper surface, guide way 26 has all been seted up to the inside wall both sides of third recess 25, guide way 26 and third recess 25 intercommunication, the equal sliding connection of inside wall of two guide ways 26 has third plate body 27, the adjacent one side fixedly connected with sixth fixed plate 28 of two third plate bodies 27, the mutual symmetry in bottom four corners of sixth fixed plate 28 all is through four leading wheels 29 of screw fixedly connected with, screw fixedly connected with cylinder 30 is passed through to the upper surface of sixth fixed plate 28, the output fixedly connected with seventh fixed plate 31 of cylinder 30, the equal fixedly connected with L shaped plate 32 in front surface and the rear surface of seventh fixed plate 31, the adjacent one side of two L shaped plates 32 all is through screw fixedly connected with second electric putter 33, the equal fixedly connected with eighth fixed plate 34 of output of two second electric putter 33.

In this embodiment, specifically: threaded through-hole 35 has all evenly been seted up to the front surface and the rear surface of backup pad 2, and threaded through-hole 35's inside wall threaded connection has bolt 36, and bolt 36 runs through first slider 4, and through the setting of bolt 36, first slider 4 slides suitable distance back in first spout 3, inserts bolt 36 in the threaded through-hole 35 that corresponds on the backup pad 2, fixes first slider 4's position.

In this embodiment, specifically: two fourth plate bodies 37 of bottom plate 1's upper surface symmetry fixedly connected with, the upper surface of two fourth plate bodies 37 all articulates there is the fifth plate body 38, the equal sliding connection of inside wall of two fifth plate bodies 38 has the second body of rod 39, four first through-holes 40 have been seted up to the upper surface symmetry of sixth fixed plate 28, the inside wall and the second body of rod 39 sliding connection of first through-hole 40, slide on the fifth plate body 38 through the second body of rod 39, insert the setting of first through-hole 40, fix the position of sixth fixed plate 28, fifth plate body 38 and the articulated setting of fourth plate body 37, prevent influencing placing of sixth plate body 49.

In this embodiment, specifically: the last fixed surface of bottom plate 1 is connected with switch box 46, the internally mounted of switch box 46 has switch block 47, one side of switch box 46 articulates there is box door 48, switch block 47's electrical output pass through the wire respectively with first electric putter 5, the electrical input electric connection of second electric putter 33 and cylinder 30, through switch box 46 and box door 48's setting, protect switch block 47, switch block 47 is responsible for controlling opening and closing of first electric putter 5, second electric putter 33 and cylinder 30.

In this embodiment, specifically: two ninth fixed plates 42 of the equal symmetrical fixedly connected with in both sides of bottom plate 1, the equal threaded connection of inside wall of four ninth fixed plates 42 has threaded rod 43, the top fixedly connected with knob 44 of threaded rod 43, the bottom of threaded rod 43 is rotated through the bearing and is connected with foot rest 45, the bottom four corners symmetry of bottom plate 1 all is through four universal wheels 41 of screw fixedly connected with, setting through knob 44, rotatory knob 44 rotates threaded rod 43, be close to foot rest 45's position to ground, until foot rest 45 and ground contact, provide the support to this device, threaded rod 43 passes through the bearing and is connected with foot rest 45 rotates, at threaded rod 43 pivoted in-process, only drive foot rest 45 and carry out the position and remove, do not rotate, the convenience is fixed to foot rest 45, improve the stability of this device.

In this embodiment, specifically: the upper surface of bottom plate 1 articulates there is the sixth plate body 49, and the rear surface welding of sixth plate body 49 has handle 50, through the setting of handle 50, conveniently covers the third recess 25 with the sixth plate body 49, and the sixth plate body 49 is used for placing the petroleum machinery work piece.

s1, moving the device to a use area through the universal wheel 41, rotating the threaded rod 43 by the rotary knob 44 according to the terrain of the use area to enable the position of the foot seat 45 to approach the ground until the foot seat 45 contacts with the ground to provide support for the device, wherein the threaded rod 43 is rotatably connected with the foot seat 45 through a bearing, and only the foot seat 45 is driven to move in position and not rotate in the rotating process of the threaded rod 43;

s2, the sixth fixing plate 28 is moved in the third groove 25 by the guide wheel 29, the sixth fixing plate 28 drives the third plate 27 to slide in the guide groove 26, the second rod 39 is inserted into the first through hole 40 of the sixth fixing plate 28 close to the sixth plate 49, the position of the sixth fixing plate 28 is fixed, then the petroleum mechanical workpiece is moved to the seventh fixing plate 31 by the hoisting tool, the switch group 47 is turned on, the second electric push rod 33 is started, the petroleum mechanical workpiece is pressed and fixed by the eighth fixing plate 34, the switch group 47 is turned on, the cylinder 30 is turned on, the proper clamping height of the petroleum mechanical workpiece on the seventh fixing plate 31 is adjusted, then the second rod 39 is pulled out from the first through hole 40, the sixth fixing plate 28 is pushed until the rear surface of the sixth fixing plate 28 contacts with the third groove 25, the second rod 39 is inserted into the first through hole 40 far from the sixth plate 49, the position of the sixth fixing plate 28 is fixed, and the size of the petroleum mechanical workpiece is adapted through the arrangement that the lantern ring 12 extrudes the first spring 11;

s3, the switch group 47 is turned on, the first electric push rod 5 is started, the petroleum mechanical workpiece is extruded and fixed through the second fixing plate 9, the second fixing plate 9 slides on the outer side wall of the first rod body 10 according to the size of the petroleum mechanical workpiece through the sleeve 8, the first spring 11 is extruded through the lantern ring 12, the fourth fixing plate 15 slides on the second sliding groove 16, the first plate body 17 is clamped into the corresponding second groove 22 on the fifth fixing plate 21, the position of the first plate body 17 is limited through the second plate body 20, when the petroleum mechanical workpiece is taken down, the female buckle 23 and the male buckle 24 are released from clamping, the first plate body 17 is released from the second groove 22, the fixing of the petroleum mechanical workpiece is enhanced through the reverse thrust of the first spring 11, the fourth fixing plate 15 slides in the second sliding groove 16, the clamping arrangement of the first plate body 17 and the second groove 22 is realized, the positions of the two first fixing plates 6 are fixed, the clamping of the petroleum mechanical workpiece is more stable;

s4, according to different clamping conditions of the petroleum machinery workpiece, the sixth fixing plate 28 is removed from the third groove 25, the sixth plate body 49 is hinged with the bottom plate 1, the third groove 25 is covered, the first slide block 4 slides in the supporting plate 2, the bolt 36 is inserted into the threaded through hole 35 to limit the position of the first slide block 4, and the height of the first fixing plate 6 is adjusted.

In this embodiment, specifically: the cassette door 48 is opened before the switch group 47 is opened, and the cassette door 48 is closed after the switch group 47 is used.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A clamping device for petroleum machinery work pieces, comprising a base plate (1), characterized in that: the middle of the upper surface of the bottom plate (1) is symmetrically and fixedly connected with two supporting plates (2), one adjacent side of the two supporting plates (2) is provided with a first sliding chute (3), the inner side wall of the two first sliding chutes (3) is connected with a first sliding block (4) in a sliding manner, one adjacent side of the two first sliding blocks (4) is fixedly connected with a first electric push rod (5) through a screw, the output ends of the two first electric push rods (5) are fixedly connected with a first fixing plate (6), one adjacent side of the two first fixing plates (6) is uniformly and fixedly connected with a shell (7), the inner side wall of the shell (7) is connected with a sleeve (8) in a sliding manner, one end of the sleeve (8) is fixedly connected with a second fixing plate (9), the outer side wall of the sleeve (8) is fixedly connected with a lantern ring (12), the inner side wall of the sleeve (8) is connected, one end of the first rod body (10) is fixedly connected with the shell (7), the outer side wall of the first rod body (10) is sleeved with a first spring (11), the upper surfaces of the two first fixing plates (6) are fixedly connected with first fixing blocks (13), the tops of the two first fixing blocks (13) are respectively fixedly connected with a third fixing plate (14) and a fourth fixing plate (15), the upper surface of the third fixing plate (14) is provided with a second sliding chute (16), the inner side wall of the second sliding chute (16) is in sliding connection with the fourth fixing plate (15), the upper surface of the fourth fixing plate (15) is hinged with a first plate body (17), the upper surface of the fourth fixing plate (15) is provided with a first groove (18), one side of the first plate body (17) is fixedly connected with a second spring (19), one end of the second spring (19) is fixedly connected with the first groove (18), the upper surface of the fourth fixing plate (15) is fixedly connected with a second plate body (20), one side of the third fixing plate (14) is hinged with a fifth fixing plate (21), a second groove (22) is uniformly formed in the lower surface of the fifth fixing plate (21), one side of the fifth fixing plate (21) is hinged with a female buckle (23), one side of the third fixing plate (14) is fixedly connected with a male buckle (24), the female buckle (23) is connected with the male buckle (24) in a clamping manner, a third groove (25) is formed in the upper surface of the bottom plate (1), guide grooves (26) are formed in two sides of the inner side wall of the third groove (25), the guide grooves (26) are communicated with the third groove (25), the inner side walls of the two guide grooves (26) are both slidably connected with a third plate body (27), and one side of the two third plate bodies (27) adjacent to each other is fixedly connected with a sixth fixing plate body (28), four guide wheels (29) are symmetrically and fixedly connected to four corners of the bottom of the sixth fixing plate (28) through screws, the upper surface of the sixth fixing plate (28) is fixedly connected with a cylinder (30) through screws, the output end of the cylinder (30) is fixedly connected with a seventh fixing plate (31), the front surface and the rear surface of the seventh fixing plate (31) are fixedly connected with L-shaped plates (32), one adjacent side of each of the two L-shaped plates (32) is fixedly connected with a second electric push rod (33) through screws, and the output ends of the two second electric push rods (33) are fixedly connected with an eighth fixing plate (34);

two fourth plate bodies (37) of upper surface symmetry fixedly connected with of bottom plate (1), two the upper surface of fourth plate body (37) all articulates there is fifth plate body (38), two the equal sliding connection of inside wall of fifth plate body (38) has the second body of rod (39), four first through-holes (40) have been seted up to the upper surface symmetry of sixth fixed plate (28), the inside wall of first through-hole (40) with the second body of rod (39) sliding connection.

2. A clamping device for a petroleum machine workpiece, according to claim 1, characterized in that: threaded through holes (35) are uniformly formed in the front surface and the rear surface of the supporting plate (2), bolts (36) are connected to the inner side wall threads of the threaded through holes (35), and the bolts (36) penetrate through the first sliding block (4).

3. A clamping device for a petroleum machine workpiece, according to claim 1, characterized in that: the last fixed surface of bottom plate (1) is connected with switch box (46), the internally mounted of switch box (46) has switch group (47), one side of switch box (46) articulates there is box door (48), the electrical output of switch group (47) pass through the wire respectively with the electrical input electric connection of first electric putter (5), second electric putter (33) and cylinder (30).

4. A clamping device for a petroleum machine workpiece, according to claim 1, characterized in that: two ninth fixed plates (42) of the equal symmetry fixedly connected with in both sides of bottom plate (1), four the equal threaded connection of inside wall of ninth fixed plate (42) has threaded rod (43), the top fixedly connected with knob (44) of threaded rod (43), the bottom of threaded rod (43) is rotated through the bearing and is connected with foot rest (45), the mutual symmetry in bottom four corners of bottom plate (1) all is through four universal wheels (41) of screw fixed connection.

5. A clamping device for a petroleum machine workpiece, according to claim 1, characterized in that: the upper surface of bottom plate (1) articulates there is sixth plate body (49), the rear surface welding of sixth plate body (49) has handle (50).

6. A clamping method of a clamping device for a petroleum machine workpiece using the clamping device according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:

s1, moving the device to a use area through a universal wheel (41), rotating a knob (44) to rotate a threaded rod (43) according to the terrain of the use area, enabling the position of a foot seat (45) to approach to the ground until the foot seat (45) is in contact with the ground to provide support for the device, rotatably connecting the threaded rod (43) with the foot seat (45) through a bearing, and driving the foot seat (45) to move in position and not rotate in the rotating process of the threaded rod (43);

s2, the sixth fixing plate (28) is located and moved in the third groove (25) through the guide wheel (29), meanwhile, the sixth fixing plate (28) drives the third plate body (27) to slide in the guide groove (26), the second rod body (39) is inserted into a first through hole (40) on the sixth fixing plate (28) close to the sixth plate body (49), the position of the sixth fixing plate (28) is fixed, then the petroleum mechanical workpiece is moved to the seventh fixing plate (31) through a hoisting tool, the switch group (47) is started, the second electric push rod (33) is started, the petroleum mechanical workpiece is extruded and fixed through the eighth fixing plate (34), the switch group (47) is started, the air cylinder (30) is started, the proper clamping height of the petroleum mechanical workpiece on the seventh fixing plate (31) is adjusted, then the second rod body (39) is pulled out of the first through hole (40), and the sixth fixing plate (28) is pushed, until the rear surface of the sixth fixing plate (28) is contacted with the third groove (25), the second rod body (39) is inserted into the first through hole (40) far away from the sixth plate body (49), and the position of the sixth fixing plate (28) is fixed;

s3, a switch group (47) is turned on, a first electric push rod (5) is started, a petroleum mechanical workpiece is extruded and fixed through a second fixing plate (9), a sleeve (8) enables the second fixing plate (9) to slide on the outer side wall of a first rod body (10) according to the size of the petroleum mechanical workpiece, meanwhile, a lantern ring (12) extrudes a first spring (11), a fourth fixing plate (15) slides on a second sliding groove (16), a first plate body (17) is clamped into a corresponding second groove (22) in a fifth fixing plate (21), the position of the first plate body (17) is limited by a second plate body (20), when the petroleum mechanical workpiece is taken down, a female buckle (23) and a sub buckle (24) are released from clamping, and the first plate body (17) is released from the second groove (22);

s4, according to different clamping conditions of the petroleum machinery workpiece, the sixth fixing plate (28) is taken down from the third groove (25), the sixth plate body (49) is hinged with the bottom plate (1), the third groove (25) is covered, the first sliding block (4) slides in the supporting plate (2), the position of the first sliding block (4) is limited by inserting a bolt (36) into the threaded through hole (35), and the height of the first fixing plate (6) is adjusted.

7. The clamping method of a clamping device for a petroleum machine workpiece according to claim 7, characterized in that: the cassette door (48) is opened before the switch group (47) is opened, and the cassette door (48) is closed after the switch group (47) is used.