CN115255802B

CN115255802B - Tool clamp for welding valve

Info

Publication number: CN115255802B
Application number: CN202211195572.0A
Authority: CN
Inventors: 洪晋姚; 洪昆炼; 洪太阳
Original assignee: Huaying Valve Industry Co ltd
Current assignee: Huaying Valve Industry Co ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2022-12-02
Anticipated expiration: 2042-09-29
Also published as: CN115255802A

Abstract

The invention provides a tool clamp for welding a valve, which belongs to the technical field of tool clamps and comprises a butt joint rotating part, a clamping part and a butt joint switching part, wherein the clamping part slides back and forth between the butt joint rotating part and the butt joint switching part, is used for clamping and fixing a valve body, keeps the clamped and fixed valve body in a flat state, and is stably fixed in the butt joint rotating part and rotates along with the rotation of the butt joint rotating part when the clamping part is positioned at the butt joint rotating part. This a frock clamp for valve welding carries out the centre gripping with the state of keeping flat to the valve body fixedly to switch the position of connection port with horizontal pivoted mode, independently part the space that valve body welding process's space and connection port switched simultaneously, both guaranteed welding processing man-hour, overall structure's compactedness and stability have provided sufficient switching space for switching connection port again simultaneously, and effectively improved the welded convenience degree of integral connection port and efficiency.

Description

Tool clamp for welding valve

Technical Field

The invention relates to the technical field of tool fixtures, in particular to a tool fixture for welding a valve.

Background

The valve generally comprises three cylindrical connecting ports, the three ports are distributed in a T shape, the three connecting ports can correspond to welding flanges, the valve body and the flanges need to be clamped and fixed by a tool clamp in the process of welding the flanges, and then the valve body and the flanges are welded together.

When the existing tool clamp is used for clamping and fixing the valve body, the requirement for welding the flange plate of a single connecting port can be generally met, the valve body is aligned with a flange to be welded through limiting and fixing the current welding connecting port, when the flange plate is welded at the other two ports, the position of the valve body needs to be changed, then the valve body is clamped and fixed, and the overall welding efficiency and convenience are low.

The invention discloses a Chinese invention patent with publication number CN110936196A, which discloses a valve body processing tool clamp for butt welding of a high-pressure valve, wherein a rotating base is arranged in a positioning frame, a valve body is placed on the base by using a clamping mechanism, the position of a welding port can be switched by rotating the base according to needs in the welding process, the processing efficiency is effectively improved, but the processing efficiency is limited by the positioning frame.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a tool clamp for welding a valve, which is achieved by the following specific technical means: including butt joint rotation part, clamping part and butt joint switching part, butt joint rotation part includes annular rolling disc, be connected with spacing connecting seat on the rolling disc and with the corresponding counterweight of spacing connecting seat, the clamping part is used for carrying out the fixed and fixed valve body of centre gripping to the valve body and is the state of keeping flat under the centre gripping, the clamping part includes the sliding seat, it is connected with the fixed subassembly of centre gripping to rotate on the sliding seat, the below of the fixed subassembly of centre gripping is connected with the rotation post of taking the stopper, it pegs graft on the sliding seat to rotate the post, butt joint switching part is including switching the seat, the upper surface of switching the seat flushes with the upper surface of spacing connecting seat, two upper surfaces are the glide plane, and all offer the spacing spout corresponding with the stopper on the glide plane, the sliding seat is the reciprocating motion on two glide planes, sliding connection has the control piece on the switching seat, the reciprocating motion that the control piece is used for controlling the sliding seat and can not influence the sliding seat and rotate along with the rolling disc, the last rotary connection of spacing connecting seat has and the spacing locking piece corresponding with the sliding seat.

The first preferred technical scheme is as follows: the switching seat is characterized in that the limiting sliding groove comprises a limiting part and a switching part, the switching part is located at one end, far away from the rotating disc, of the limiting part, a driving disc is arranged in the switching part, the upper surface of the driving disc is provided with two switching blocks, the switching blocks are evenly distributed around the center of the driving disc, two switching columns are arranged on the bottom surfaces of the rotating columns, the switching columns are evenly distributed around the center of the bottom surfaces of the rotating columns, and the switching blocks correspond to the switching columns one to one.

The preferred technical scheme is as follows: the fixed subassembly of centre gripping includes lower grip slipper, fixedly connected with intermediate junction seat on the lower grip slipper, sliding connection has last grip slipper about on the intermediate junction seat, goes up and is connected with the retaining member between grip slipper and the intermediate junction seat, and wherein, the grip face that lower grip slipper and last grip slipper correspond all includes the arc clamping face with connection port one-to-one, and still is provided with the annular holder corresponding with the valve body intermediate position on the clamping face.

The preferred technical scheme is three: be provided with the packed column in the annular holder, the packed column elastic sliding is pegged graft in the annular holder, and equal screw thread peg graft has the regulation pole in lower grip slipper and the last grip slipper, fixedly connected with gag lever post on the regulation pole, has seted up the sliding tray corresponding with the gag lever post on the packed column.

The preferable technical scheme is four: the control piece comprises a sliding piece, an L-shaped push-pull rod and an L-shaped through groove, the sliding piece is connected to the switching seat in a sliding mode, the L-shaped push-pull rod is fixedly connected to one side, close to the rotating disc, of the sliding piece, the end portion of the L-shaped push-pull rod is located in the L-shaped through groove, and the L-shaped through groove is formed in the side face, close to the sliding piece, of the sliding seat.

The preferred technical scheme is five: the limiting locking piece comprises a threaded rod, a trapezoidal block is connected to the top end of the threaded rod in a threaded mode, the trapezoidal block is connected to the limiting connecting seat in a sliding mode from top to bottom, and an adjusting groove corresponding to the trapezoidal block and a threaded groove corresponding to the threaded rod are formed in the sliding seat.

The preferred technical scheme is six: the middle connecting seat is L-shaped, sliding block strips are arranged on the top of the middle connecting seat and the bottom of the sliding seat, and corresponding sliding track grooves are formed in the counterweight piece, the limiting connecting seat and the switching seat.

The preferred technical scheme is seven: the rotating disc is rotatably connected with a mounting seat, and a belt transmission device is arranged between the mounting seat and the rotating disc.

The invention has the following beneficial effects: 1. this a frock clamp for valve welding carries out the centre gripping with the state of keeping flat to the valve body fixedly, and switch the position of connection port with horizontal pivoted mode, the space that switches valve body welding process simultaneously independently separates with the space that the connection port switches, both guaranteed welding processing, overall structure's compactedness and stability, corresponding stability and the welded quality that has improved welding process, simultaneously again for rotating the valve body switch connection port provide sufficient switching space, and need not the repeated welding process that can accomplish connection port of the centre gripping fixed state of change valve body, the convenience and the efficiency of processing of valve body integral connection port welding process have effectively been improved.

2. This a frock clamp for valve welding passes through the combined action of slider, L shape push-and-pull rod and the logical groove of L shape, both can control the sliding seat and switch the seat and the reciprocal slip between spacing connecting seat, can not influence the sliding seat again simultaneously along with the rotation of rolling disc 1, and overall structure and working process are all very simple.

3. This a frock clamp for valve welding not only will drive the fixed subassembly pivoted of centre gripping drive structure and the fixed subassembly scientific and reasonable of centre gripping separately, has reduced among the welding process, carousel pivoted load, and has simple structure, the convenient and strong advantage of interference killing feature of work.

4. This a frock clamp for valve welding passes through arc clamping face and annular holder, carries out spacing centre gripping to the valve body, and not only the stability of centre gripping is high, and is suitable for the different valve bodies of intermediate structure.

5. This a frock clamp for valve welding has improved the stability that annular holder is fixed to the not isostructure centre gripping through the setting of annular holder, packed column, gag lever post and sliding tray.

6. This a frock clamp for valve welding passes through the combined action of threaded rod, trapezoidal piece, adjustment tank and thread groove, with the stable connection of sliding seat and spacing connecting seat together, and whole connection process is simple swift.

Drawings

Fig. 1 is a schematic view of the overall structure of a first view angle of the present invention.

FIG. 2 is an enlarged view of the invention at A in FIG. 1.

FIG. 3 is a schematic view of the overall structure of the second view angle of the present invention.

FIG. 4 is an exploded view of the present invention.

FIG. 5 is a schematic view of a clamping and fixing assembly according to the present invention.

Fig. 6 is a schematic bottom sectional view of the local switching seat of the present invention.

Fig. 7 is a schematic structural diagram of a switching block and a switching column of the present invention.

FIG. 8 is a schematic view of the structure of the annular clamping member and the packing column of the present invention.

In the figure: 1. rotating the disc; 2. a limiting connecting seat; 3. a counterweight; 4. a sliding seat; 5. clamping and fixing the assembly; 51. a lower clamping seat; 52. a middle connecting seat; 53. an upper clamping seat; 54. a locking member; 6. a limiting block; 7. rotating the column; 8. a switching seat; 9. a limiting chute; 10. a control member; 101. a slider; 102. an L-shaped push-pull rod; 103. an L-shaped through groove; 11. a limiting locking piece; 111. a threaded rod; 112. a trapezoidal block; 113. an adjustment groove; 114. a thread groove; 12. a drive plate; 13. a switching block; 14. switching columns; 15. an annular clamping member; 16. filling a column; 17. adjusting a rod; 18. a limiting rod; 19. a sliding groove; 20. a slider bar; 21. a sliding track groove; 22. a mounting base; 23. a belt drive.

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.

Referring to fig. 1, a tooling fixture for welding a valve includes a butt-joint rotating portion, a clamping portion and a butt-joint switching portion, the clamping portion slides reciprocally between the butt-joint rotating portion and the butt-joint switching portion, and is used for clamping and fixing the valve body, the clamped and fixed valve body is in a flat state, and when the valve body is positioned at the butt joint rotating part, the valve body is stably fixed in the butt joint rotating part and rotates along with the rotation of the butt joint rotating part, at the moment, one of the connecting ports of the valve body is aligned with the flange to be welded, the two synchronously rotate coaxially, welding processing is carried out in the rotating process, after the current connecting port is welded, the clamping part slides to the butt joint switching part, and rotates ninety degrees or one hundred eighty degrees in the butt joint switching part to ensure that one of the other two connecting ports is opposite to the butt joint rotating part, then the clamping part slides into the butt joint rotating part to continue the welding work, according to the characteristics that the three connecting ports of the valve body are distributed in a T shape and the circle centers of the three connecting ports are on the same plane, the fixed state of the valve body is limited, the circle centers of three connecting ports of the valve body are on the same horizontal plane, the positions of the connecting ports are switched in a horizontal rotating mode, in the welding process, the corresponding connecting port can be accurately positioned at the welding position only by horizontally rotating the valve body without repeatedly replacing the position of the valve body, in addition, the invention separates the welding processing space of the valve body and the switching space of the connecting port independently, thereby ensuring that when in welding processing, the compactness and the stability of the whole structure provide sufficient switching space for switching the connecting port of the rotary valve body, and the stability of the welding process is improved while the required space for switching the valve body is met.

Referring to fig. 1, 2, 3 and 6, the butt joint rotation portion includes an annular rotation disc 1, the rotation disc 1 is connected with a limit connection seat 2 and a counterweight 3 corresponding to the limit connection seat 2, the rotation disc 1 is rotatably connected with an installation seat 22, in the welding process, a clamping portion is connected to the limit connection seat 2 and located between the limit connection seat 2 and the counterweight 3, the clamping portion includes a sliding seat 4, a clamping fixing component 5 is rotatably connected to the sliding seat 4, a rotation column 7 with a limit block 6 is fixedly connected to the lower portion of the clamping fixing component 5, the rotation column 7 is rotatably inserted into the sliding seat 4, the valve body is clamped and fixed by the clamping fixing component 5 and is in a flat state, as shown in fig. 4, the circle centers of three connection ports of the valve body are on the same horizontal plane, the clamping fixing component 5 is driven to rotate by rotating the rotation column 7, and then drive the valve body to rotate, in the course of welding, as shown in fig. 3, one of the connection ports passes through the center of the rotating disc 1 and the welding position from front to back, a three-jaw chuck is also arranged at the back side of the rotating disc 1, the three-jaw chuck is used for clamping and fixing the flange and driving the flange to rotate (the structural schematic diagram of the three-jaw chuck and the flange is not shown in the figure), at this time, the connection port, the circle center of the three-jaw chuck and the circle center of the rotating disc 1 are on the same straight line, when the connection port needs to be switched by rotating the valve body, the connection part sliding seat 4 drives the clamping and fixing component 5 to slide from back to front from the limit connection seat 2 to the butt connection switching part, the butt connection switching part comprises a switching seat 8, the upper surface of the switching seat 8 is flush with the upper surface of the limit connection seat 2, both upper surfaces are sliding surfaces, the sliding seat 4 slides back and forth on the two sliding surfaces, and the slip plane has all offered the spacing concrete chute 9 corresponding to stopper 6, rotate and connect with the spacing locking piece 11 corresponding to sliding seat 4 on the spacing connecting seat 2, the spacing concrete chute 9 on the switching seat 8 includes spacing part and switching part, the switching part locates at the spacing part and keeps away from one end of the rotating disc 1, when the sliding seat 4 slips to switching seat 8 and stopper 6 locates at the switching part, rotate the column 7 of rotation and drive the fixed subassembly of centre gripping 5 to switch over the position of the connection port, sliding seat 4 slips to the spacing connecting seat 2 again after finishing switching over, then carry on spacing fixedly to sliding seat 4 through the spacing locking piece 11, make it connect together with spacing connecting seat 2 steadily, and spacing to stopper 6 through the spacing concrete chute 9, make the fixed subassembly of centre gripping 5 link together with sliding seat 4 steadily, to sum up, make the linear reciprocal slip between switching seat 8 and spacing connecting seat 2 through the sliding seat 4, make the welding process space of the connection port of the valve body separate from space of switching over independently, and the overall structure is simple.

Referring to fig. 1, 2, 3 and 4, a control member 10 is slidably connected to the switching seat 8, the control member 10 is configured to control the sliding seat 4 to slide back and forth without affecting the rotation of the sliding seat 4 with the rotating disc 1, the control member 10 includes a sliding member 101, an L-shaped push-pull rod 102 and an L-shaped through slot 103, the sliding member 101 is slidably connected to the switching seat 8 back and forth, the L-shaped push-pull rod 102 is fixedly connected to one side of the sliding member 101 close to the rotating disc 1, and an end portion of the L-shaped through slot 103 is located in the L-shaped through slot 103, the L-shaped through slot 103 is opened on a side surface of the sliding seat 4 close to the sliding member 101, the L-shaped through slot 103 is in an arc shape, a center of the arc shape is aligned with a center of the rotating disc 1, as shown in fig. 3, when the sliding member 101 slides back and forth, the sliding seat 4 is driven to slide back and forth between the switching seat 8 and the limit connection seat 2 by the L-shaped through rod 102, when the sliding seat 4 rotates with the rotating disc 1, the L-shaped through slot 102 and the sliding seat 4 do not affect the sliding seat 4 and the sliding seat 4 does not affect the sliding seat 4 and the rotating disc 1, and the sliding seat 4 does not affect the sliding seat 4 and the sliding seat 4, and the sliding seat can not only do not easily.

Referring to fig. 3, 4, 6 and 7, a driving disc 12 is rotatably disposed in the switching portion of the limiting chute 9, two switching blocks 13 are disposed on the upper surface of the driving disc 12, the switching blocks 13 are uniformly distributed around the center of the driving disc 12, two switching columns 14 are disposed on the bottom surface of the rotating column 7, the switching columns 14 are uniformly distributed around the center of the bottom surface of the rotating column 7, the switching blocks 13 and the switching columns 14 are in one-to-one correspondence, when the sliding seat 4 slides to the switching seat 8 from back to front and the limiting block 6 is located at the position of the switching portion, the switching columns 14 on the rotating column 7 move to the state corresponding to the switching blocks 13, as shown in the view below fig. 7, at this time, the driving disc 12 is rotated counterclockwise, the switching blocks 13 can drive the rotating column 7 to rotate through the switching columns 14, the rotating column 7 is controlled to rotate ninety degrees or one-hundred-eighty degrees according to-processing requirements, and then the driving disc 12 drives the switching blocks 13 to return to the initial state, as shown in the upper view of fig. 7, at this time, no matter the rotating post 7 rotates ninety degrees or one hundred eighty degrees, the switching block 13 will not prevent the switching post 14 from sliding backwards along with the sliding seat 4, and at the same time will not prevent the sliding seat 4 from sliding forwards again to the position where the limiting block 6 is located at the switching part, in conclusion, the present invention not only scientifically and reasonably separates the driving structure for driving the clamping and fixing assembly 5 to rotate from the clamping and fixing assembly 5, and reduces the load of the rotating disc 1 during the welding process, but also has the advantages of simple structure, convenient operation and strong anti-interference capability, and can accommodate the sliding error of the sliding seat 4 to a certain extent, even if the center of the rotating post 7 is not on the same vertical line as the driving disc 12, as long as the switching post 14 is located within the range of the switching block 13, during the process that the switching block 13 rotates along with the driving disc 12, the switch block 13 can be driven to control the rotation column 7 to rotate ninety degrees or one-hundred-eighty degrees.

Referring to fig. 1, 4 and 5, the clamping fixing assembly 5 includes a lower clamping seat 51, an intermediate connecting seat 52 is fixedly connected to the lower clamping seat 51, an upper clamping seat 53 is slidably connected to the intermediate connecting seat 52 up and down, the lower clamping seat 51 is rotatably connected to the sliding seat 4, the rotating column 7 is fixedly connected to the bottom surface of the lower clamping seat 51, a locking member 54 is connected between the upper clamping seat 53 and the intermediate connecting seat 52, the locking member 54 is a locking screw, the locking screw is in threaded connection with the intermediate connecting seat 52 and is rotatably connected to the upper clamping seat 53, and is located above the upper clamping seat 53, wherein the clamping surfaces of the lower clamping seat 51 and the upper clamping seat 53 respectively include arc-shaped clamping surfaces corresponding to the connecting ports one by one, and an annular clamping member 15 corresponding to the middle position of the valve body is further provided on the clamping surfaces, in the process of fixing the valve body, the valve body is placed on the lower clamping seat 51, the arc-shaped clamping surfaces of the lower clamping seat 51 respectively correspond to the three connecting ports of the valve body, and are used for limiting the connecting ports, and then the clamping structure of the valve body can be stable and stable for the clamping structure of the intermediate clamping member.

Referring to fig. 5 and 8, a packing column 16 is arranged in the annular clamping member 15, the packing column 16 is elastically limited and slidably inserted on the annular clamping member 15, an adjusting rod 17 is inserted in the lower clamping seat 51 and the upper clamping seat 53, a limiting rod 18 is fixedly connected to the adjusting rod 17, the limiting rod 18 is positioned at one side of the packing column 16 far away from the valve body and is used for limiting the packing column 16, sliding grooves 19 corresponding to the limiting rod 18 are formed in the packing column 16, and movable grooves corresponding to the adjusting rod 17 are formed in the packing column 16, as shown in fig. 8, when the surface of the valve body middle structure corresponding to the annular clamping member 15 is a plane, the adjusting rod 17 is rotated to drive the limiting rod 18 on the adjusting rod to move to a position corresponding to the position of the non-sliding groove 19 of the packing column 16, the packing column 16 is limited by the limiting rod 18, the packing column 16 and the annular clamping piece 15 are combined together to form a circular clamping surface to clamp and fix a corresponding plane on the valve body, the state is also suitable for an arc-shaped surface, when the corresponding plane is a spherical surface, the adjusting rod 17 is rotated reversely, the limiting rod 18 moves to the position corresponding to the sliding groove 19, in the clamping process, the packing column 16 slides in the direction far away from the valve body, and at the moment, the spherical surface is clamped and fixed through the annular clamping surface on the annular clamping piece 15.

Referring to fig. 1, 4 and 6, the limiting locking member 11 includes a threaded rod 111, a trapezoidal block 112 is in threaded connection with the top end of the threaded rod 111, the trapezoidal block 112 is vertically and slidably embedded on the limiting connection seat 2, an adjusting groove 113 corresponding to the trapezoidal block 112 and a threaded groove 114 corresponding to the threaded rod 111 are provided on the sliding seat 4, when the sliding seat 4 slides onto the limiting connection seat 2, the corresponding threaded rod 111 slides upwards to enable the trapezoidal block 112 at the top end of the sliding seat 112 to be inserted into the adjusting groove 113 on the sliding seat 4, then the threaded rod 111 is engaged and connected with the threaded groove 114 by rotating, and the position of the sliding seat 4 is adjusted by limiting the trapezoidal block 112 through the adjusting groove 113, so that the threaded groove 114 and the threaded rod 111 are precisely abutted together, the sliding seat 4 and the limiting connection seat 2 are stably connected together, and the whole connection process is simple and fast.

Referring to fig. 1, 5 and 6, the intermediate connection seat 52 is L-shaped, the top of the intermediate connection seat and the bottom of the sliding seat 4 are both provided with the slider bar 20, the counterweight 3, the limiting connection seat 2 and the switching seat 8 are provided with corresponding sliding track grooves 21, when the sliding seat 4 slides between the limiting connection seat 2 and the switching seat 8 in a reciprocating manner, the slider bar 20 slides in the corresponding sliding track groove 21, the sliding stability of the sliding seat 4 is improved in the same manner, and the sliding stability of the sliding seat 4 and the stability of the sliding along with the rotation of the rotating disc 1 are further improved by the sliding track groove 21 arranged on the counterweight 3.

Referring to fig. 1 and 2, a belt transmission device 23 is disposed between the mounting seat 22 and the rotating disc 1, and the rotating disc 1 is driven to rotate by the belt transmission device 23.

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. The utility model provides a be used for valve welded frock clamp which characterized in that: the butt joint rotating part comprises an annular rotating disc (1), and a limiting connecting seat (2) and a counterweight (3) corresponding to the limiting connecting seat (2) are connected to the rotating disc (1);

the clamping part is used for clamping and fixing the valve body, the clamped and fixed valve body is in a flat state, the clamping part comprises a sliding seat (4), a clamping and fixing component (5) is rotatably connected onto the sliding seat (4), a rotating column (7) with a limiting block (6) is fixedly connected below the clamping and fixing component (5), and the rotating column (7) is rotatably inserted into the sliding seat (4);

the butt joint switching part comprises a switching seat (8), the upper surface of the switching seat (8) is flush with the upper surface of the limiting connecting seat (2), the two upper surfaces are sliding surfaces, limiting sliding grooves (9) corresponding to the limiting blocks (6) are formed in the sliding surfaces, the sliding seat (4) slides on the two sliding surfaces in a reciprocating mode, a control piece (10) is connected on the switching seat (8) in a sliding mode, the control piece (10) is used for controlling the sliding seat (4) to slide in a reciprocating mode and cannot influence the sliding seat (4) to rotate along with the rotating disc (1), and a limiting locking piece (11) corresponding to the sliding seat (4) is connected on the limiting connecting seat (2) in a rotating mode;

the limiting sliding groove (9) on the switching seat (8) comprises a limiting part and a switching part, the switching part is located at one end, far away from the rotating disc (1), of the limiting part, a driving disc (12) is arranged in the switching part in a rotating mode, two switching blocks (13) are arranged on the upper surface of the driving disc (12), the switching blocks (13) are uniformly distributed around the center of the driving disc (12), two switching columns (14) are arranged on the bottom surface of the rotating column (7), the switching columns (14) are uniformly distributed around the center of the bottom surface of the rotating column (7), and the switching blocks (13) and the switching columns (14) are in one-to-one correspondence;

the clamping and fixing assembly (5) comprises a lower clamping seat (51), an intermediate connecting seat (52) is fixedly connected to the lower clamping seat (51), an upper clamping seat (53) is connected to the intermediate connecting seat (52) in an up-and-down sliding manner, a locking part (54) is connected between the upper clamping seat (53) and the intermediate connecting seat (52), clamping surfaces of the lower clamping seat (51) and the upper clamping seat (53) corresponding to each other respectively comprise arc-shaped clamping surfaces which correspond to the connecting ports one by one, and an annular clamping part (15) corresponding to the middle position of the valve body is further arranged on each clamping surface;

be provided with packed column (16) in annular holder (15), packed column (16) elastic sliding pegs graft on annular holder (15), and equal screw thread pegs graft in lower grip slipper (51) and last grip slipper (53) has adjusting pole (17), fixedly connected with gag lever post (18) on adjusting pole (17), has seted up sliding tray (19) corresponding with gag lever post (18) on packed column (16).

2. The tool clamp for welding the valve according to claim 1, wherein: the control piece (10) comprises a sliding piece (101), an L-shaped push-pull rod (102) and an L-shaped through groove (103), the sliding piece (101) is connected to the switching seat (8) in a sliding mode, the L-shaped push-pull rod (102) is fixedly connected to one side, close to the rotating disc (1), of the sliding piece (101), the end portion of the L-shaped push-pull rod is located in the L-shaped through groove (103), and the L-shaped through groove (103) is formed in the side face, close to the sliding piece (101), of the sliding seat (4).

3. The tool clamp for welding the valve according to claim 1, wherein: the limiting locking piece (11) comprises a threaded rod (111), a trapezoidal block (112) is in threaded connection with the top end of the threaded rod (111), the trapezoidal block (112) is in up-and-down sliding connection with the limiting connecting seat (2), and an adjusting groove (113) corresponding to the trapezoidal block (112) and a threaded groove (114) corresponding to the threaded rod (111) are formed in the sliding seat (4).

4. The tool clamp for welding the valve according to claim 1, wherein: the middle connecting seat (52) is L-shaped, sliding block strips (20) are arranged on the top of the middle connecting seat and the bottom of the sliding seat (4), and corresponding sliding track grooves (21) are formed in the counterweight piece (3), the limiting connecting seat (2) and the switching seat (8).

5. The tool clamp for welding the valve according to claim 1, wherein: the rotary disc (1) is rotatably connected with a mounting seat (22), and a belt transmission device (23) is arranged between the mounting seat (22) and the rotary disc (1).