A cutting device for processing preheater shell

Abstract

The present application provides a cutting device for processing a preheater shell, which belongs to the technical field of preheater shell processing, comprising a frame and a laser cutting head arranged at the upper end of the frame, wherein sword grids are distributed in left and right arrays inside the frame, and a base is distributed in left and right arrays inside the frame, and a plurality of connecting rods are hinged inside the base, and the upper ends of the connecting rods are hinged to the support rods, and the outer sides of the support rods are slidably connected to two slides, and the upper ends of the slides are provided with clamping components; a limit component is provided inside the frame, and the limit component is used to enable the slide and the support rod to undergo relative displacement in the front and rear directions, and the outer side surface of the front slide is provided with a slide groove that slides with the limit component, and the outer side of the base is provided with a convex strip that slides with the limit component; the present application facilitates the loading and clamping of the plate, and can at the same time eliminate the warping of the plate itself to a certain extent, thereby improving the flatness of the plate during cutting and the accuracy of plate cutting.

Description

Technical Field

[0001] The present application relates to the technical field of preheater shell processing, and in particular to a cutting device for preheater shell processing. Background Art

[0002] An air preheater, also known as an air preheater, is a preheating device that improves boiler heat exchange performance and reduces heat loss. The air preheater transfers heat from the flue gas discharged from the boiler's tail flue through the heat sink to the air entering the boiler, preheating the air to a specific temperature.

[0003] Preheaters are generally divided into three types: plate type, rotary type and tubular type. The shell of the plate type air preheater is mostly made of thin steel plate. When processing the shell of the air preheater, it is necessary to first use a laser cutting machine to cut the plate into the corresponding shape, and then the preheater shell is formed by bending. In order to ensure the cutting accuracy of the plate, the plate usually needs to be clamped and fixed at the edge during cutting.

[0004] Referring to the Chinese patent document with announcement number CN119077183B, entitled A plate positioning device for a laser cutting machine and a fully automatic laser cutting line, the lifting component is assisted by a distance adjustment component to move, the lifting component drives the support plate to rise and fall, the upper end surface of the plate is fixed by a pressure plate, and the edge of the plate is automatically positioned and clamped by the cooperation of multiple clamping components.

[0005] Referring to the above technical solution, a plurality of clamping assemblies are driven by a driving assembly to move toward each other synchronously, so that the plurality of clamping assemblies are in contact with the edge of the plate, and then the plate is fixed and clamped by the plurality of clamping assemblies cooperating with each other; although the automatic clamping and fixing of the plate can be achieved, the preheater shell is usually made of thin steel plate, and during the processing of the thin steel plate, the thin steel plate may be affected by factors such as uneven pressure during rolling or thermal deformation during cutting, resulting in warping on the surface of the thin steel plate. At this time, when the plate is positioned and clamped by the clamping assemblies moving toward each other, the clamping assemblies need to contact the edge of the plate and apply a certain pressure to the plate to achieve positioning and clamping of the plate. The plate will undergo a certain displacement during positioning and clamping. At this time, the plate contacts the sword grid of the laser cutting machine, which can easily cause the surface of the plate to be scratched, and the pressure applied by the clamping assembly to the plate may aggravate the warping of the plate, which will still affect the accuracy of plate cutting. Summary of the Invention

[0006] In view of this, the present application provides a cutting device for processing a preheater shell, which is used to solve the problem that the cutting accuracy of the plate is affected due to warping of the plate surface during laser cutting.

[0007] In order to solve the above technical problems, the present application provides a cutting device for processing a preheater shell, comprising a frame and a laser cutting head arranged at the upper end of the frame, wherein sword grids are distributed in left and right arrays inside the frame, and a base is distributed in left and right arrays inside the frame, and a plurality of connecting rods are hinged inside the base, and the upper ends of the connecting rods are hinged to the support rods, and two slides are slidably connected to the outer sides of the support rods, and the upper ends of the slides are provided with clamping assemblies; a limit assembly is provided inside the frame, and the limit assembly is used to enable the slide and the support rod to undergo relative displacement in the front and rear directions, and the outer side surface of the front slide is provided with a slide groove that slides with the limit assembly, and the outer side of the base is provided with a convex strip that slides with the limit assembly, so as to enable the limit assembly and the front slide to undergo vertical relative displacement.

[0008] By adopting the above technical solution, the clamping assembly can clamp the edge of the plate, and the support rod can move up and down while moving back and forth. Since the support rod, the connecting rod and the base form multiple parallelograms, the support rod always remains parallel to the base when swinging at the hinge point at the bottom of the connecting rod, keeping the plate always in a horizontal state during loading. When the support rod moves to the upper end, the edge of the plate is sent into the clamping assembly to achieve preliminary fixation of the edge of the plate, which is convenient for loading and clamping the plate; at the same time, under the limiting action of the limiting assembly, the front slide and the clamping assembly cannot move backward with the support rod. As the support rod moves, the front clamping assembly and the support rod undergo relative displacement, so that the front clamping assembly keeps moving vertically downward, while the rear clamping assembly moves with the support rod, and can move backward while moving downward, thereby leveling the clamped plate, which can eliminate the warping of the plate itself to a certain extent, and improve the flatness of the plate during cutting and the accuracy of plate cutting.

[0009] Optionally, the limit assembly includes a linear drive arranged inside the frame, a crossbeam is provided at the upper end of the linear drive, a limit seat is provided at the upper end of the crossbeam, the limit seat is slidably connected to the base through a protruding strip, and the limit seat is vertically slidably connected to the slide on the front side through a sliding groove.

[0010] By adopting the above technical solution, the position of the limit seat can be adjusted according to the size of the plate, so that plates of different sizes can be positioned and clamped. In addition, the limit seat can limit the moving direction of the slide, which is convenient for subsequent leveling of the plate.

[0011] Optionally, a limiting strip is symmetrically provided on the upper end of the limiting seat, and a limiting frame is symmetrically provided on the rear end of the base.

[0012] Optionally, the upper surfaces of the limit bar and the limit frame are at the same height, and the upper surfaces of the limit bar and the limit frame are both lower than the sword grid.

[0013] By adopting the above technical solution, the clamping assembly can abut against the limit bar and the limit frame, thereby limiting the lowest position of the clamping assembly and preventing the clamping part of the plate from directly contacting the sword grid and being clamped.

[0014] Optionally, the clamping assembly includes a half-thread stud arranged at the upper end of the slide, and the upper end of the slide is vertically slidably connected to a pressure plate through two half-thread studs. A spring is sleeved on the outer side of the half-thread stud, and the upper end of the half-thread stud is threadedly connected to a nut. The spring is located between the nut and the pressure plate so that the pressure plate has a tendency to move downward.

[0015] By adopting the above technical solution, when the slide moves downward, the pressure plate can be separated from the slide. Under the elastic force of the spring, the pressure plate can press and fix the plate. By adjusting the nut at the upper end of the half-thread stud, the initial pressure of the spring can be adjusted, thereby adjusting the clamping force of the plate.

[0016] Optionally, the bottom surface of the pressing plate is provided with a U-shaped clamping plate for clamping the plate, and the opening directions of the two U-shaped clamping plates corresponding to the front and rear positions are opposite.

[0017] By adopting the above technical solution, the edge of the plate is sent into the corresponding U-shaped clamping plate, which facilitates the preliminary clamping and fixing of the edge of the plate.

[0018] Optionally, the clamping assembly further includes a tension spring, which is arranged inside the U-shaped clamping plate on the rear side, and a clamping block is provided at the front end of the tension spring.

[0019] By adopting the above technical solution, when the plate is stretched, the clamping block can move with the plate, and the tension spring can apply a backward elastic pulling force to the clamping block, causing the plate to be flattened while minimizing the forward and backward displacement of the front side of the plate, thereby improving the accuracy of plate clamping.

[0020] Optionally, the upper surfaces of the support rods are provided with ball seats in a front and rear array, and steel balls are installed inside the ball seats.

[0021] By adopting the above technical solution, when the support rod moves to the highest position, the steel ball is higher than the sword grid, and the plate contacts the steel ball during loading, which makes it convenient to adjust the position of the plate during loading and reduces the probability of the plate surface being scratched.

[0022] Optionally, cylinders are hinged to the left and right arrays at the front end of the interior of the frame, and the telescopic ends of the cylinders are hinged to the front ends of the support rods corresponding to the front and rear directions, respectively, to drive the support rods to move.

[0023] Optionally, limiting rods capable of abutting against the connecting rods are evenly arranged inside the base.

[0024] By adopting the above technical solution, when the connecting rod swings to contact the limiting rod, it can limit the maximum swing position of the connecting rod.

[0025] In summary, compared with the prior art, this application has at least one of the following beneficial technical effects:

[0026] 1. The edge of the plate can be initially positioned and clamped by the clamping assembly, which is convenient for loading and initial clamping of the plate. At the same time, under the limiting action of the limiting assembly, the distance between the clamping assemblies on the front and rear sides gradually increases while moving down to release the material, thereby leveling the plate after clamping, which can eliminate the warping of the plate itself to a certain extent, and improve the flatness of the plate during cutting and the accuracy of plate cutting.

[0027] 2. While the plate is being stretched, the clamping assembly on the front side can fix and clamp the front end of the plate, and the clamping assembly on the rear side can move relative to the plate and apply elastic tensile force to the plate until the plate is pressed and fixed by the pressing plate. While the plate is being flattened, the reference of the front side of the plate can remain unchanged, further improving the accuracy of plate cutting.

[0028] 3. When loading the plate, the bottom surface of the plate is in contact with the steel ball, which makes it easy to adjust the position of the plate during loading. At the same time, it can avoid the plate from contacting the sword grid, reducing the probability of the plate surface being scratched. When the plate is clamped, the support rod moves down to the lowest position. At this time, the steel ball is lower than the sword grid, and the plate is supported by the sword grid, which is convenient for cutting the plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of a cutting device for processing a preheater shell in this application;

[0030] Figure 2 This is a schematic top view of the structure of a cutting device for processing a preheater shell according to the present application;

[0031] Figure 3 This is a schematic diagram of the partial structure of the base of this application;

[0032] Figure 4 This is a schematic diagram of the right side structure of the base of this application;

[0033] Figure 5 For this application Figure 4 A schematic diagram of the partially enlarged structure at center A;

[0034] Figure 6 This is a front cross-sectional structural diagram of the limit assembly of this application;

[0035] Figure 7 This is a schematic diagram of the internal cross-sectional structure of the clamping assembly of this application.

[0036] Explanation of the accompanying drawings: 1. Frame; 101. Laser cutting head; 102. Sword fence; 2. Base; 21. Raised strip; 22. Limit rod; 3. Connecting rod; 4. Support rod; 5. Slide seat; 51. Slide groove; 6. Clamping assembly; 61. Half-thread stud; 62. Pressure plate; 63. Spring; 64. U-shaped splint; 641. Tension spring; 642. Clamping block; 7. Limiting assembly; 71. Linear drive; 72. Crossbeam; 73. Limiting seat; 74. Limiting strip; 75. Limiting frame; 8. Ball seat; 81. Steel ball; 9. Cylinder. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application Figure 1-Figure 7 , the technical solutions of the embodiments of the present application are clearly and completely described. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of this application.

[0038] Reference Figure 1 and Figure 2 This embodiment provides a cutting device for processing a preheater shell, including a frame 1, a clamping mechanism and a limit assembly 7; a laser cutting head 101 for cutting a plate is provided at the upper end of the frame 1, and sword grids 102 are distributed in an array on the left and right sides of the interior of the frame 1, and the sword grids 102 are used to support the plate.

[0039] Reference Figure 4 、 Figure 5 and Figure 7 The clamping mechanism includes a base 2, a connecting rod 3, a support rod 4, a slide 5 and a clamping assembly 6. The base 2 is arranged inside the frame 1, and the base 2 is distributed in a left and right array. The connecting rods 3 are all hinged to the inside of the base 2. The inside of the base 2 is evenly provided with limit rods 22 for limiting the maximum rotation position of the connecting rod 3. The support rod 4 is located at the upper end of the base 2 and corresponds one to one vertically to the base 2. The upper ends of the connecting rods 3 located inside the same base 2 are hinged to the vertically corresponding support rods 4. The slide 5 is slidably connected to the front and rear ends of the support rod 4. The slide 5 at the rear end can be relatively fixed to the support rod 4 by bolts. The clamping assembly 6 is arranged at the upper end of the slide 5, and the clamping assembly 6 is used to clamp and fix the plate.

[0040] Reference Figure 5 and Figure 7The clamping assembly 6 includes a half-thread stud 61, a pressure plate 62, a spring 63 and a U-shaped clamp 64. The half-thread stud 61 is arranged on the upper end of the slide 5, and the number of half-thread studs 61 on each upper end of the slide 5 is two. The pressure plate 62 is slidably connected to the upper end of the slide 5 through the half-thread stud 61, and the spring 63 is sleeved on the outer side of the half-thread stud 61. The upper end of the half-thread stud 61 is threadedly connected with a nut, and the spring 63 is located between the nut and the pressure plate 62 so that the pressure plate 62 has a tendency to move downward; the U-shaped clamp 64 is arranged on the bottom surface of the pressure plate 62, and the two U-shaped clamps 64 corresponding to the front and rear positions have opposite opening directions, and the U-shaped clamp 64 is used to clamp the plate; the U-shaped clamp 64 on the rear side is provided with a tension spring 641, and the front end of the tension spring 641 is provided with a clamping block 642, which is located inside the U-shaped clamp 64 on the rear side and can be displaced relative to it.

[0041] Reference Figure 2 and Figure 3 The internal front end of the frame 1 is hinged with a cylinder 9, which is distributed in a left and right array. The cylinders 9 correspond to the support rods 4 in a one-to-one manner in the front and rear directions. The telescopic ends of the cylinders 9 are respectively hinged with the front ends of the corresponding support rods 4.

[0042] Through the operation of the cylinder 9, the cylinder 9 can drive the corresponding support rod 4 to move. At this time, since the support rod 4, the connecting rod 3 and the base 2 form multiple parallelograms, the support rod 4 always remains parallel to the base 2 when swinging at the hinge point at the bottom of the connecting rod 3, keeping the plate in a horizontal state at all times during loading; when loading, first move the support rod 4 to the highest position, and then place the plate between the front and rear corresponding slides 5, and make the rear end edge of the plate be stuck into the inside of the U-shaped clamp 64 on the rear side. The clamp 642 is an elastic opening clamp. When the plate is inserted into the opening of the clamp 642, the elastic force of the clamp 642 itself can perform preliminary elastic clamping on the rear end edge of the plate; then the linear drive 71 drives the crossbeam 72 and the limit seat 73 to move backward, The limiting seat 73 slides relative to the base 2, and the position of the U-shaped clamping plate 64 at the front end is adjusted so that the front end of the plate is stuck in the inside of the U-shaped clamping plate 64 on the front side. When the U-shaped clamping plate 64 on the front side moves to the appropriate position, the front end of the plate can be positioned and clamped. When the plate is cut, it can be cut based on the front edge of the plate; then the cylinder 9 drives the support rod 4 to swing at the hinge point at the bottom of the connecting rod 3, so that the support rod 4 remains horizontal and moves downward and backward, so that the plate contacts the sword grid 102. At this time, the slide 5 continues to move downward with the support rod 4, and the pressure plate 62 no longer continues to move downward under the limiting action of the plate, thereby separating the pressure plate 62 from the slide 5, and the spring 63 is gradually compressed, thereby pressing the plate against the upper end of the sword grid 102, thereby fixing the plate.

[0043] Reference Figure 3 、 Figure 4 and Figure 6The limit assembly 7 includes a linear drive 71, a crossbeam 72 and a limit seat 73. The linear drive 71 is arranged inside the frame 1, the crossbeam 72 is arranged at the upper end of the linear drive 71, and the limit seats 73 are arranged in a left and right array at the upper end of the crossbeam 72. The limit seats 73 correspond vertically to the base 2 one by one. The limit seats 73 can slide in the front and back directions with the vertically corresponding base 2 through the convex strips 21. The limit seat 73 is vertically slidably connected to the front slide 5 through the slide groove 51; the upper end of the limit seat 73 is symmetrically provided with a limit strip 74, and the rear end of the base 2 is symmetrically provided with a limit frame 75. The upper surface of the limit strip 74 is consistent with the upper surface of the limit frame 75, and the upper surfaces of the limit strip 74 and the limit frame 75 are both lower than the sword fence 102.

[0044] When in use, the support rod 4 and the slide 5 move to the highest position, at which time the rear end of the plate is sent into the interior of the U-shaped clamping plate 64 on the rear side. At this time, the tension spring 641 inside the U-shaped clamping plate 64 on the rear side is in a compressed state, and the clamping block 642 at the end of the tension spring 641 can undergo relative displacement in the front-to-back direction with the U-shaped clamping plate 64; when clamping the plate, the rear end of the plate is inserted into the interior of the clamping block 642, and the clamping block 642 is an elastic opening clamp. When the plate is inserted into the opening of the clamping block 642, the elastic force of the clamping block 642 itself can perform preliminary elastic clamping on the rear end edge of the plate; then the linear drive 71 drives the crossbeam 72 and the limit seat 73 to move backward, and the limit seat 73 slides relative to the base 2, adjusting the position of the U-shaped clamping plate 64 at the front end, so that the front end of the plate is stuck in the front side. When the U-shaped clamping plate 64 is inside the U-shaped clamping plate 64, the front end of the plate can be positioned and clamped. When the plate is cut, the front edge of the plate can be used as a reference for cutting. Then the support rod 4 moves downward and backward under the driving action of the cylinder 9, and the front slide 5 slides relative to the support rod 4 under the limiting action of the limiting seat 73, so that the front slide 5 can only move vertically downward, while the rear slide 5 moves downward and backward synchronously with the support rod 4, so that the distance between the two slides 5 gradually increases as they move downward. Since the edge of the plate is clamped by the U-shaped clamping plate 64, as the two slides 5 move, the plate is gradually stretched by the U-shaped clamping plate 64, thereby eliminating the warping of the plate during the clamping process as much as possible and ensuring the flatness of the plate when cutting.

[0045] When the plate is being stretched, the front U-shaped clamping plate 64 directly clamps the front end of the plate, and the rear end of the plate is clamped by the clamping block 642 inside the U-shaped clamping plate 64. Therefore, when the distance between the two slides 5 becomes larger, the front U-shaped clamping plate 64 can still clamp the plate, and the rear side of the plate and the clamping block 642 can undergo relative displacement in the front-to-back direction with the rear U-shaped clamping plate 64. At the same time, the tension spring 641 is stretched, which can apply an elastic tensile force to the plate until the plate is completely pressed and fixed by the pressing plate 62, and the clamping position of the front end of the plate can be kept unchanged, thereby ensuring that the reference of the front side of the plate remains unchanged, thereby improving the accuracy of plate cutting.

[0046] When the plate is compressed, the pressure plate 62 separates from the slide 5, and the spring 63 applies downward pressure to the pressure plate 62. At the same time, the limit bar 74 contacts the bottom surface of the U-shaped clamp 64 on the front side, and the limit frame 75 contacts the bottom surface of the U-shaped clamp 64 on the rear side. Through the cooperation of the pressure plate 62, the limit bar 74 and the limit frame 75, the U-shaped clamp 64 is squeezed and deformed to achieve clamping and fixing of the plate, and it can be at a suitable height, which can avoid the compressed part of the plate from directly abutting against the sword grid 102, thereby reducing the probability of the clamping part of the plate being scratched.

[0047] Reference Figure 1 and Figure 2 The upper surface of the support rod 4 is provided with ball seats 8 in a front and rear array, and steel balls 81 are installed inside the ball seats 8.

[0048] When the support rod 4 is at the highest position, the height of the steel ball 81 is higher than the height of the sword grid 102. At this time, when the plate is loaded, the bottom surface of the plate contacts the steel ball 81, which is convenient for adjusting the position of the plate, avoiding contact between the plate and the sword grid 102, and reducing the probability of the plate surface being scratched; when the plate is clamped, the support rod 4 is at the lowest position. At this time, the steel ball 81 is lower than the sword grid 102, and the plate is supported by the sword grid 102, which is convenient for cutting the plate.

[0049] The implementation principle of a cutting device for processing a preheater shell in the embodiment of the present application is as follows:

[0050] When in use, the cylinder 9 works and can drive the corresponding support rod 4 to move. At this time, the support rod 4, the connecting rod 3 and the base 2 form a plurality of parallelograms, so that the support rod 4 always remains parallel to the base 2 while the displacement occurs; when the support rod 4 and the slide 5 move to the highest position, the rear end of the plate is sent into the interior of the U-shaped clamping plate 64 on the rear side. At this time, the tension spring 641 inside the U-shaped clamping plate 64 on the rear side is in a compressed state, and the clamping block 642 at the end of the tension spring 641 performs a preliminary elastic clamping on the rear side of the plate; at this time, the height of the steel ball 81 is higher than the height of the sword fence 102. When the plate is loaded, the bottom surface of the plate contacts the steel ball 81, which is convenient for adjusting the position of the plate, avoiding contact between the plate and the sword fence 102, and reducing the probability of the plate surface being scratched; then the linear drive 71 drives the crossbeam 72 and the limiting seat 73 to move backward, and the limiting seat 73 slides relative to the base 2, so that the front end of the plate is stuck in the interior of the U-shaped clamping plate 64 on the front side, thereby achieving clamping and fixing the plate.

[0051] Then the support rod 4 moves downward and backward under the driving action of the cylinder 9, and the front slide 5 slides relative to the support rod 4 under the limiting action of the limit seat 73, so that the front slide 5 can only move vertically downward, while the rear slide 5 moves downward and backward synchronously with the support rod 4, so that the distance between the two slides 5 gradually increases as they move downward. Since the edge of the plate is clamped by the U-shaped clamping plate 64, the plate is gradually stretched by the U-shaped clamping plate 64 as the two slides 5 move, thereby eliminating the warping of the plate during the clamping process as much as possible and ensuring the flatness of the plate during cutting; when the support rod 4 is at the lowest position, the steel ball 81 is lower than the sword grid 102, and the plate is supported by the sword grid 102, which facilitates the cutting of the plate.

[0052] When the plate is being stretched, the front U-shaped clamp 64 directly clamps the front end of the plate, and the rear end of the plate is clamped by the clamping block 642 inside the U-shaped clamp 64. Therefore, when the distance between the two slides 5 becomes larger, the front U-shaped clamp 64 can still clamp the plate, and the rear side of the plate abuts against the clamping block 642, causing the clamping block 642 and the rear U-shaped clamp 64 to be relatively displaced. At the same time, the tension spring 641 is stretched, applying an elastic tensile force to the plate, so that the plate remains as flat as possible until the plate is completely pressed and fixed by the pressing plate 62, thereby ensuring that the reference of the rear side of the plate remains unchanged, thereby improving the accuracy of plate cutting.

[0053] When the plate is compressed, the pressure plate 62 separates from the slide 5, and the spring 63 applies downward pressure to the pressure plate 62. At the same time, the limit bar 74 contacts the bottom surface of the U-shaped clamp 64 on the front side, and the limit frame 75 contacts the bottom surface of the U-shaped clamp 64 on the rear side. Through the cooperation of the pressure plate 62, the limit bar 74 and the limit frame 75, the U-shaped clamp 64 is squeezed and deformed to achieve clamping and fixing of the plate, and the plate is placed at an appropriate height, which can avoid the compressed part of the plate from directly abutting against the sword grid 102, thereby reducing the probability of the clamping part of the plate being scratched.

[0054] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A cutting device for processing a preheater shell, comprising a frame and a laser cutting head disposed on the upper end of the frame, wherein sword grids are distributed in an array on the left and right sides of the frame, characterized in that: The frame is provided with bases arranged in arrays on the left and right sides, with multiple connecting rods hinged inside the bases, the upper ends of the connecting rods are hinged to the support rods, the outer sides of the support rods are slidably connected to two slides, and the upper ends of the slides are provided with clamping components; A limit assembly is provided inside the frame, and the limit assembly is used to enable the slide and the support rod to undergo relative displacement in the front-to-back direction. A sliding groove is provided on the outer side of the front slide, and a convex strip is provided on the outer side of the base, which is slidably engaged with the limit assembly, so that the limit assembly and the front slide can undergo vertical relative displacement. The limit assembly includes a linear actuator arranged inside the frame, a crossbeam is provided at the upper end of the linear actuator, a limit seat is provided at the upper end of the crossbeam, the limit seat is slidably connected to the base through a convex strip, the limit seat is vertically slidably connected to the front slide through a slide groove, the upper end of the limit seat is symmetrically provided with a limit strip, and the rear end of the base is symmetrically provided with a limit frame; The clamping assembly includes a half-thread stud provided on the upper end of the slide, and the upper end of the slide is vertically slidably connected to a pressure plate through two half-thread studs. The bottom surface of the pressure plate is provided with a U-shaped clamping plate for clamping the plate, and the opening directions of the two U-shaped clamping plates corresponding to the front and rear positions are opposite; The clamping assembly also includes a tension spring, which is arranged inside the U-shaped clamping plate on the rear side, and a clamping block is provided at the front end of the tension spring.

2. The cutting device for processing a preheater shell according to claim 1, characterized in that: The upper surfaces of the limiting strip and the limiting frame are at the same height, and the upper surfaces of the limiting strip and the limiting frame are both lower than the sword grid.

3. The cutting device for processing a preheater shell according to claim 1, characterized in that: The outer sides of the half-thread studs are sleeved with springs, the upper ends of the half-thread studs are threadedly connected with nuts, and the springs are located between the nuts and the pressure plate to make the pressure plate tend to move downward.

4. The cutting device for processing a preheater shell according to claim 1, characterized in that: The upper surfaces of the support rods are provided with ball seats in a front and rear array, and steel balls are installed inside the ball seats.

5. The cutting device for processing a preheater shell according to claim 1, characterized in that: The front end of the frame is hinged to the left and right arrays with cylinders, and the telescopic ends of the cylinders are respectively hinged to the front ends of the support rods corresponding to the front and rear directions.

6. The cutting device for processing a preheater shell according to claim 1, characterized in that: Limiting rods capable of abutting against the connecting rods are evenly arranged inside the base.

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