Operation method of connecting pin device capable of preventing movement and saving insertion and extraction labor

Abstract

The invention relates to an operation method of a connecting pin device capable of preventing movement and saving insertion and extraction labor, the operation method is completed through the connecting pin device, and the connecting pin device comprises an inlet side pin seat, an outlet side pin seat, a connecting pin, a tensioning pin, a connecting pin baffle and a seat baffle. The operation method comprises the following steps of (1) pin boss connection, (2) connecting pin limiting, (3) pin boss connection and fixation, (4) pin boss connection disconnection, (5) floor separation and (6) connecting pin reinstallation at the outlet limit position. The connecting pin has the beneficial effects that the connecting pin is prevented from moving back and forth and falling off in the axis direction, the connecting reliability of the outlet side pin seat and the inlet side pin seat is enhanced, the problem that the connecting pin cannot be inserted and pulled in a static state is solved, the workload of operators is reduced, the working efficiency of connecting and disassembling work is improved, and the working efficiency of roller replacement is improved; and smooth roller replacing work is guaranteed, and potential safety hazards of the roller replacing work are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of metal rolling, and in particular to an operating method for a connecting pin device that prevents movement and is labor-saving to plug and unplug. Background Art

[0002] Two types of roll changing operations are required during production of a four-roll hot-rolled plate and strip mill, one is the working roll changing, the other is the support roll changing. In order to quickly change the working rolls, two floors with rails are required, one is a push-roll floor for loading spare working rolls, and the other is a pull-out roll floor for accommodating the working rolls to be replaced. When changing rolls, first align the empty pull-out roll floor rails with the rails in the mill and pull out the old rolls, then translate the floor to align the push-roll floor rails with the rails in the mill and then push the new rolls into the mill; and replacing the support rolls requires separating and lifting the two floors for the working roll changing, and then using the support roll changing device to replace the support rolls.

[0003] The push-roller floor and the pull-roller floor are frequently disassembled, and the connecting pins in the two connecting pin seats on the sides of the two floors often jump out of the pin seats by themselves during the frequent movement of the roll-changing floor. If one of the two connecting pins jumps out and falls while the other is still in a connected state, uneven force will be applied, resulting in phenomena such as the floor "splits", which makes it impossible to change rolls or other safety problems. In addition, the pin holes of traditional connecting pin seats are often misaligned or deformed, which causes the connecting pin to get stuck and cannot be pulled out when the support roll needs to be replaced, or the connecting pin falls off and the operator cannot smoothly reinsert the connecting pin, which increases the operator's workload and creates safety hazards to equipment operation. Summary of the invention

[0004] In order to overcome the deficiencies in the prior art, the present invention provides an operating method for a connecting pin device that prevents movement and saves effort in plugging and unplugging. The method changes the pin hole on the web of the pin seat on the inlet side into a double-diameter pin hole, and utilizes the large-diameter center of the double-diameter pin hole to be concentric with the circular pin hole to make it easier to plug and unplug the connecting pin, thereby avoiding the situation where the connecting pin cannot be plugged in or unplugged due to misalignment or deformation. The limiting ring groove behind the connecting pin and the semicircular pin groove of the connecting pin baffle are used to limit the axial position of the connecting pin, thereby preventing the connecting pin from moving and falling off during the movement of the roller changing floor. A hydraulic pushing device is used to push the roller pulling floor and the roller pushing floor to cooperate, thereby facilitating the connection and disassembly of the connecting pin device, reducing the workload of operators, improving the work efficiency of connection and disassembly, improving the work efficiency of roller changing, ensuring the smooth progress of roller changing, and reducing the safety hazards of roller changing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A connecting pin device that prevents movement and saves effort in plugging and unplugging comprises an inlet side pin seat, an outlet side pin seat, a connecting pin, a tensioning pin, a connecting pin baffle and a seat baffle, the inlet side pin seat web is provided with a double-diameter pin hole and a long slot hole, the outlet side pin seat belly is provided with two round pin holes, the connecting pin passes through the double-diameter pin hole and the round pin hole to connect the inlet side pin seat and the outlet side pin seat, one end of the connecting pin is provided with a limiting ring groove, the limiting ring groove is provided with a connecting pin baffle limit, the connecting pin baffle is provided with a seat baffle limit, and one side of the seat baffle is provided with a socket that is inserted into the outlet side pin seat web, and the end face abuts against the end face of the inlet side pin seat web.

[0007] Furthermore, the operation method of the anti-movement and labor-saving plugging and unplugging connecting pin device comprises the following steps:

[0008] 1) Pin connection

[0009] The inlet side pin seat is installed on the side of the roller floor, and the outlet side pin seat is installed on the side of the roller floor. The web of the inlet side pin seat and the web of the outlet side pin seat are inserted relative to each other. The center of the large aperture of the double-hole pin hole is concentric with the circular pin hole. The connecting pin is inserted into the double-aperture pin hole and the circular pin hole to connect the inlet side pin seat and the outlet side pin seat.

[0010] 2) Connecting pin limit

[0011] The connecting pin is inserted into place, and the limiting ring groove on the connecting pin cooperates with the connecting pin baffle to install the connecting pin. An opening is set on one side of the connecting pin baffle, and a semicircular pin groove is set at the bottom of the opening. The floor is pulled so that the center of the small aperture of the double-aperture pin hole is concentric with the circular pin hole, and the limiting ring groove of the connecting pin is embedded in the semicircular pin groove of the connecting pin baffle;

[0012] 3) Pin seat connection and fixation

[0013] A seat baffle is arranged between the outlet side pin seat and the inlet side pin seat, the seat baffle limits the outlet side pin seat and the inlet side pin seat, the connecting pin cooperates with the seat baffle to connect and fix the inlet side pin seat and the outlet side pin seat, the connecting pin baffle abuts against the seat baffle, the seat baffle limits the connecting pin baffle, the connecting pin baffle is fixedly locked and connected in the limiting ring groove of the connecting pin, the roller drawing floor and the push roller floor are connected, and the push roller floor and the roller drawing floor are moved to replace the working rolls of the rolling mill;

[0014] 4) Pin holder connection disconnected

[0015] When replacing the support roller, disassemble the pin seat connection of the roller floor and the push roller floor, use the lifting device to connect the seat baffle, pull the roller floor back to eliminate the squeezing of the seat baffle, and use the lifting device to remove the seat baffle by lever principle. After the seat baffle is removed, the floors on both sides continue to move toward the roller floor. When they move for a distance and stop, the push roller floor continues to move toward the roller floor according to inertia, and the outlet side pin seat moves toward the inlet side pin seat. The round pin hole is concentric with the large aperture of the double-diameter pin hole again, and the connecting pin is freed from the axial restriction of the connecting pin baffle and can be pulled out freely, and the inlet side pin seat and the outlet side pin seat are disconnected;

[0016] 5) Floor separation

[0017] After the connecting pin is pulled out, the roller floor pushes the push roller floor to move toward the outlet side until the maximum stroke; then the roller floor is jogged back and the seat baffle is reinserted between the pin seat on the outlet side and the pin seat on the inlet side, and the roller floor pushes the push roller floor toward the outlet side again until the push roller floor reaches the outlet limit position and a safety pin is inserted to prevent the floor from moving, and finally the roller floor moves toward the inlet side to the inlet limit position, and the two floors are separated to prepare for replacing the support rollers;

[0018] 6) Reinstall the connecting pin at the outlet limit position

[0019] First, pull out the safety pin between the two pin seats, and move the roller floor to the extreme position on the outlet side. Then insert the tensioning pin into the long slot hole set on the web of the inlet side pin seat and the round pin hole set on the web of the outlet side pin seat, connect the inlet side pin shaft and the outlet side pin seat, and then move the roller floor toward the roller floor and drive the push roller floor to move a distance at the same time and then stop moving. At this time, the push roller floor will continue to approach the roller floor due to inertia, and the double-diameter pin hole of the inlet side pin seat is concentric with the round pin hole of the outlet side pin seat. Repeat the above steps 1)-3) to achieve the connection between the inlet side pin seat and the outlet side pin seat.

[0020] Furthermore, a guide device is provided at the top of the web of the outlet side pin seat and the insertion position of the seat baffle.

[0021] Furthermore, the double-diameter pin hole is two circular holes of unequal diameters and non-concentricities that are connected in parallel, and the length of the center lines of the two circular holes is smaller than the radius of the small-diameter circular hole.

[0022] Furthermore, the lifting device in step 4) includes a weight, a bracket and a lifting rod, the bracket is supported on the top of the inlet side pin seat, and the weight and the seat baffle are arranged on both sides of the lifting rod.

[0023] Furthermore, in the step 1), when the double-diameter pin hole is not concentric with the round pin hole and the connecting pin cannot be installed, the double-diameter pin hole and the round pin hole are made concentric by pushing the roller floor toward the roller pushing floor.

[0024] Furthermore, a shallow pit is provided at the exit limit position in the step 5), and the shallow pit provides acceleration to the push roller floor toward the exit side.

[0025] Furthermore, a hydraulic pushing device is arranged on one side of the roller floor, and the hydraulic pushing device pushes the roller floor, and the roller floor moves and is connected to the pushing roller floor.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The limiting ring groove of the connecting pin and the connecting pin baffle cooperate to limit the connecting pin to prevent it from moving back and forth along the axial direction and falling off due to vibration. The connection reliability between the pin seat on the outlet side and the pin seat on the inlet side is strengthened to prevent the push roller floor and the pull roller floor from "split" accidents due to the falling off of the connecting pin during the roller changing process, so as to ensure the smooth roller changing and reduce safety hazards.

[0028] 2. The use of double-diameter pin holes avoids the restriction of pin hole misalignment and deformation when inserting / pulling out the connecting pin, solves the problem of the connecting pin being unable to be inserted or pulled out under static conditions, effectively saves labor workload, and ensures personal and equipment safety.

[0029] 3. Use the hydraulic pushing device to push the roller floor and the push roller floor to cooperate, which is convenient for the quick connection and disassembly of the inlet side pin seat and the outlet side pin seat, reduces the workload of operators, improves the work efficiency of connection and disassembly, improves the work efficiency of roller changing, ensures the smooth progress of roller changing, and reduces the safety hazards of roller changing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the connection structure of a connecting pin device that prevents movement and saves effort when plugging and unplugging, as described in the present invention.

[0031] Figure 2 It is a structural isometric view of a connecting pin device for preventing movement and saving effort for plugging and unplugging according to the present invention.

[0032] Figure 3 It is a structural isometric view of a connecting pin device for preventing movement and saving effort for plugging and unplugging as described in the present invention.

[0033] Figure 4 It is a schematic diagram of the tension pin connection structure described in the present invention.

[0034] Figure 5 It is a schematic diagram of the connecting pin structure of the present invention.

[0035] Figure 6 It is a schematic diagram of the inlet side pin seat structure of the present invention.

[0036] Figure 7 It is a front view of the inlet side pin seat structure described in the present invention.

[0037] Figure 8 It is a schematic diagram of the pin seat structure on the outlet side of the present invention.

[0038] Fig. 9 It is a schematic diagram of the connecting pin baffle structure of the present invention.

[0039] Fig.10 It is a schematic diagram of the seat baffle structure of the present invention.

[0040] Fig.11 It is a structural schematic diagram of the lifting device described in the present invention.

[0041] Fig.12 It is a schematic diagram of the roller changing working structure of the roller changing floor according to the present invention.

[0042] Fig.13 It is a schematic diagram of the structure of the traditional roller changing floor pin seat described in the present invention.

[0043] Fig.14 It is a schematic diagram of the misaligned and deformed structure of the pin seat of the conventional roller changing floor according to the present invention.

[0044] In the figure: 1 outlet side pin seat; 1.1 round pin hole; 2 inlet side pin seat; 2.1 double-diameter pin hole; 2.2 long slot hole; 3 connecting pin; 3.1 limit ring groove; 4 tension pin; 5 connecting pin baffle; 5.1 opening; 5.2 semicircular pin groove; 6 seat baffle; 6.1 socket; 7 guide device; 8 push roller floor; 9 pull roller floor; 10 lifting device; 10.1 weight; 10.2 bracket; 10.3 lifting rod; 11 connecting pin device; 12 working roller to be replaced; 13 spare working roller; 14 support roller. DETAILED DESCRIPTION

[0045] The specific implementation mode of the present invention is further described below:

[0046] like Figure 1-Figure 10As shown, the working principle of a connecting pin device that prevents movement and saves effort for plugging and unplugging is as follows: the inlet side pin seat 2 is installed on the end surface of the roller floor 9 facing the push roller floor 8, and the outlet side pin seat 1 is installed on the end surface of the push roller floor 8 facing the roller floor 9. The inlet side pin seat 2 and the outlet side pin seat 1 are relatively matched with the webs for staggered insertion. The large diameter hole of the double-diameter pin hole 2.1 on the web of the inlet side pin seat 2 coincides with the round pin hole 1.1 on the web of the outlet side pin seat 1. Insert the connecting pin 3 into the overlapping pin holes, and the limiting ring groove 3.1 of the connecting pin 3 extends out of the pin hole to cooperate with the installation of the connecting pin baffle 5. Pull the roller floor 9 to increase the distance between the roller floor 9 and the push roller floor 8, and the inlet side pin seat 2 is forced to move away from the outlet. The inlet-side pin seat 11 moves in the direction of the inlet side pin seat 11, and the double-diameter pin hole 2.1 also moves in the away direction. The round pin hole 1.1 is concentric with the small aperture of the double-diameter pin hole 2.1. At this time, the seat baffle 6 is inserted. The seat baffle 6 defines the positions of the inlet-side pin seat 2 and the outlet-side pin seat 1. The outlet-side pin seat 1 and the inlet-side pin seat 2 are locked and fixed. The end face of the connecting pin baffle 5 also rests against the end face of the seat baffle 6. Under the push of the seat baffle 6, the limiting ring groove 3.1 of the connecting pin 3 is limited and fixed in the semicircular pin groove 5.2 of the opening 5.1 of the connecting pin baffle 5. The pull-out roller floor 9 and the push-roll floor 8 are connected and fixed. During the replacement of the working roller, the accident of the connecting pin 3 moving and falling off is avoided, thereby reducing the safety hazard of roller replacement.

[0047] like Figure 1-Figure 14 As shown, a connecting pin device that prevents movement and saves effort in plugging and unplugging is provided. The connecting pin device 11 includes an inlet side pin seat 2, an outlet side pin seat 1, a connecting pin 3, a tensioning pin 4, a connecting pin baffle 5 and a seat baffle 6. The web of the inlet side pin seat 2 is provided with a double-diameter pin hole 2.1 and a long slot hole 2.2, and the web of the outlet side pin seat 1 is provided with two round pin holes 1.1. The connecting pin 3 passes through the double-diameter pin hole 2.1 and the round pin hole 1.1 to connect the inlet side pin seat 2 and the outlet side pin seat 1. A limiting ring groove 3.1 is provided at one end of the connecting pin 3, and the limiting ring groove 3.1 is provided with a connecting pin baffle 5 for limiting, and the connecting pin baffle 5 is provided with a seat baffle 6 for limiting, and a socket 6.1 is provided on one side of the seat baffle 6 to insert into the web of the outlet side pin seat 1, and the end face is abutted against the end face of the web of the inlet side pin seat 2.

[0048] Furthermore, the operation method of the anti-movement and labor-saving plugging and unplugging connecting pin device comprises the following steps:

[0049] 1) Pin connection

[0050] The inlet side pin seat 2 is installed on the side of the roller floor 9, and the outlet side pin seat 1 is installed on the side of the roller floor 8. The web of the inlet side pin seat 2 and the web of the outlet side pin seat 1 are inserted relative to each other. The center of the large aperture of the double-aperture pin hole 2.1 is concentric with the circular pin hole 1.1. The connecting pin 3 is inserted into the double-aperture pin hole 2.1 and the circular pin hole 1.1 to connect the inlet side pin seat 2 and the outlet side pin seat 1.

[0051] 2) Connecting pin limit

[0052] The connecting pin 3 is inserted into place, and the limiting ring groove 3.1 provided on the connecting pin 3 cooperates with the connecting pin baffle 5 to be installed. An opening 5.1 is provided on one side of the connecting pin baffle 5, and a semicircular pin groove 5.2 is provided at the bottom of the opening 5.1. The floor is pulled so that the center of the small aperture of the double-aperture pin hole 2.1 is concentric with the circular pin hole 1.1, and the limiting ring groove 3.1 of the connecting pin 3 is embedded in the semicircular pin groove 5.2 of the connecting pin baffle 5;

[0053] 3) Pin seat connection and fixation

[0054] A seat baffle 6 is arranged between the outlet side pin seat 1 and the inlet side pin seat 2, and the seat baffle 6 limits the outlet side pin seat 1 and the inlet side pin seat 2. The connecting pin 3 cooperates with the seat baffle 6 to connect and fix the inlet side pin seat 2 and the outlet side pin seat 1. The connecting pin baffle 5 abuts against the seat baffle 6, and the seat baffle 6 limits the connecting pin baffle 5. The connecting pin baffle 5 is fixedly locked and connected in the limiting ring groove 3.1 of the connecting pin 3. After the outlet side pin seat 1 and the inlet side pin seat 2 are connected and fixed, the roller extraction floor 9 is connected with the roller pushing floor 8. After the roller pushing floor 8 and the roller extraction floor 9 are moved and connected, the working roll 12 to be replaced is pulled out of the rolling mill, and the spare working roll 13 is pushed into the rolling mill.

[0055] 4) Pin holder connection disconnected

[0056] When replacing the support roller, disassemble the roller floor 9 and the push roller floor 8 to leave space in front of the support roller 14 to set up the support roller replacement equipment to replace the support roller 14. To disassemble the roller floor 9 and the push roller floor 8, it is necessary to first disassemble the inlet side pin seat 2 and the outlet side pin seat 1, use the lifting device 10 to connect the seat baffle 6, pull the roller floor back to eliminate the squeezing of the seat baffle 6, and the lifting device 10 uses the lever principle to remove the seat baffle 6. After the seat baffle 6 is removed, the floors on both sides continue to move toward the roller floor 9. When they move a certain distance and stop, the push roller floor 8 continues to move toward the roller floor 9 according to inertia, and the outlet side pin seat 1 moves toward the inlet side pin seat 2. The round pin hole 1.1 is concentric with the large aperture of the double-diameter pin hole 2.1 again, and the connecting pin 3 gets rid of the axial restriction of the connecting pin baffle 5 and is pulled out freely, and the inlet side pin seat 2 and the outlet side pin seat 1 are disconnected;

[0057] 5) Floor separation

[0058] After the connecting pin 3 is pulled out, the roller floor 9 pushes the roller floor 8 to move toward the outlet side until the maximum stroke; then the roller floor 8 is jogged back and the seat baffle 6 is reinserted between the pin seat 1 on the outlet side and the pin seat 2 on the inlet side, and the roller floor 9 pushes the roller floor 8 to move toward the outlet side again until the roller floor 8 reaches the outlet limit position and inserts the safety pin to prevent the floor from moving, and finally the roller floor 9 moves toward the inlet side to the inlet limit position, and the two floors are separated to prepare for replacing the support rollers;

[0059] 6) Reinstall the connecting pin at the outlet limit position

[0060] First, pull out the safety pin between the two pin seats, and translate the roller floor 9 to the extreme position on the outlet side. Then insert the tensioning pin 4 into the long slot hole 2.2 set on the web of the inlet side pin seat 2 and the round pin hole 1.1 set on the web of the outlet side pin seat 1, connect the inlet side pin seat 2 and the outlet side pin seat 1, and then the hydraulic pushing device pulls the roller floor 9 to move toward the inlet side, and the push roller floor 8 connected by the tensioning pin 4 moves a distance at the same time and then stops moving. At this time, the push roller floor 8 will continue to approach the roller floor 9 due to inertia, and the double-diameter pin hole 2.1 of the inlet side pin seat 2 is concentric with the round pin hole 1.1 of the outlet side pin seat 1. Repeat the above steps 1)-3) to achieve the connection between the inlet side pin seat 2 and the outlet side pin seat 1. After the connection, remove the tensioning pin 4 to prevent the tensioning pin 4 from moving and falling off during the roller changing movement to avoid safety hazards.

[0061] like Figure 1-Figure 3 As shown, further, a guide device 7 is provided at the top of the web of the outlet side pin seat 1 and the insertion position of the seat baffle 2.

[0062] like Figure 6-Figure 7 As shown, further, the double-diameter pin hole 2.1 is two circular holes of unequal diameters and non-concentricities connected in parallel, and the length of the center lines of the two circular holes is smaller than the radius of the small-diameter circular hole.

[0063] Furthermore, a hydraulic pushing device is provided on one side of the roller floor 9, and the hydraulic pushing device pushes the roller floor 9, so that the roller floor 9 moves the connected pushing roller floor 8.

[0064] like Fig.11 As shown, further, the lifting device in step 4) includes a weight 10.1, a bracket 10.2 and a lifting rod 10.3, the bracket 10.2 is supported on the top of the inlet side pin seat 2, and the weight 10.1 and the seat baffle 6 are arranged on both sides of the lifting rod 10.3.

[0065] Furthermore, in the step 1), when the double-diameter pin hole is not concentric with the round pin hole and the connecting pin cannot be installed, the hydraulic pushing device is used to push the roller floor 9 toward the roller floor 8 to make the double-diameter pin hole 2.1 and the round pin hole 1.1 concentric.

[0066] Furthermore, a shallow pit is set at the exit limit position in the step 5), and the shallow pit provides acceleration to the push roller floor 8 toward the exit side. The push roller floor 8 moves toward the exit side through the shallow pit, speeding up the separation of the push roller floor 8 and the pull roller floor 9, and eliminating the squeezing of the pin seats on both sides on the seat baffle 6.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A connecting pin device that prevents movement and saves effort when plugging and unplugging, characterized in that: It includes an inlet side pin seat, an outlet side pin seat, a connecting pin, a tensioning pin, a connecting pin baffle and a seat baffle. The inlet side pin seat web is provided with a double-diameter pin hole and a long slot hole, the outlet side pin seat belly is provided with two round pin holes, the connecting pin passes through the double-diameter pin hole and the round pin hole to connect the inlet side pin seat and the outlet side pin seat, one end of the connecting pin is provided with a limiting ring groove, the limiting ring groove is provided with a connecting pin baffle limit, the connecting pin baffle is provided with a seat baffle limit, one side of the seat baffle is provided with a socket to insert into the outlet side pin seat web, and the end face is abutted against the end face of the inlet side pin seat web.

2. An operating method for the anti-movement and labor-saving plug-in and pull-out connecting pin device according to claim 1, characterized in that: The operation method of the anti-movement and labor-saving plugging and unplugging connecting pin device comprises the following steps: 1) Pin connection The inlet side pin seat is installed on the side of the roller floor, and the outlet side pin seat is installed on the side of the roller floor. The web of the inlet side pin seat and the web of the outlet side pin seat are inserted relative to each other. The center of the large aperture of the double-hole pin hole is concentric with the circular pin hole. The connecting pin is inserted into the double-aperture pin hole and the circular pin hole to connect the inlet side pin seat and the outlet side pin seat. 2) Connecting pin limit The connecting pin is inserted into place, and the limiting ring groove on the connecting pin cooperates with the connecting pin baffle to install the connecting pin. An opening is set on one side of the connecting pin baffle, and a semicircular pin groove is set at the bottom of the opening. The floor is pulled so that the center of the small aperture of the double-aperture pin hole is concentric with the circular pin hole, and the limiting ring groove of the connecting pin is embedded in the semicircular pin groove of the connecting pin baffle; 3) Pin seat connection and fixation A seat baffle is arranged between the outlet side pin seat and the inlet side pin seat, the seat baffle limits the outlet side pin seat and the inlet side pin seat, the connecting pin cooperates with the seat baffle to connect and fix the inlet side pin seat and the outlet side pin seat, the connecting pin baffle abuts against the seat baffle, the seat baffle limits the connecting pin baffle, the connecting pin baffle is fixedly locked and connected in the limiting ring groove of the connecting pin, the roller drawing floor and the push roller floor are connected, and the push roller floor and the roller drawing floor are moved to replace the working rolls of the rolling mill; 4) Pin holder connection disconnected When replacing the support roller, disassemble the pin seat connection of the roller floor and the push roller floor, use the lifting device to connect the seat baffle, pull the roller floor back to eliminate the squeezing of the seat baffle, and use the lifting device to remove the seat baffle by lever principle. After the seat baffle is removed, the floors on both sides continue to move toward the roller floor. When they move for a distance and stop, the push roller floor continues to move toward the roller floor according to inertia, and the outlet side pin seat moves toward the inlet side pin seat. The round pin hole is concentric with the large aperture of the double-diameter pin hole again, and the connecting pin is freed from the axial restriction of the connecting pin baffle and can be pulled out freely, and the inlet side pin seat and the outlet side pin seat are disconnected; 5) Floor separation After the connecting pin is pulled out, the roller floor pushes the push roller floor to move toward the outlet side until the maximum stroke; then the roller floor is jogged back and the seat baffle is reinserted between the pin seat on the outlet side and the pin seat on the inlet side, and the roller floor pushes the push roller floor toward the outlet side again until the push roller floor reaches the outlet limit position and a safety pin is inserted to prevent the floor from moving, and finally the roller floor moves toward the inlet side to the inlet limit position, and the two floors are separated to prepare for replacing the support rollers; 6) Reinstall the connecting pin at the outlet limit position First, pull out the safety pin between the two pin seats, and move the roller floor to the extreme position on the outlet side. Then insert the tensioning pin into the long slot hole set on the web of the inlet side pin seat and the round pin hole set on the web of the outlet side pin seat, connect the inlet side pin shaft and the outlet side pin seat, and then move the roller floor toward the roller floor and drive the push roller floor to move a distance at the same time and then stop moving. At this time, the push roller floor will continue to approach the roller floor due to inertia, and the double-diameter pin hole of the inlet side pin seat is concentric with the round pin hole of the outlet side pin seat. Repeat the above steps 1)-3) to achieve the connection between the inlet side pin seat and the outlet side pin seat.

3. A connecting pin device for preventing movement and saving effort for plugging and unplugging according to claim 1, characterized in that: A guide device is arranged at the top of the web plate of the outlet side pin seat and the insertion position of the seat baffle.

4. A connecting pin device for preventing movement and saving effort for plugging and unplugging according to claim 1, characterized in that: The double-diameter pin hole is two circular holes with different diameters and different centers that are connected in parallel, and the length of the center lines of the two circular holes is smaller than the radius of the small-diameter circular hole.

5. The method for operating a connecting pin device for preventing movement and saving effort for plugging and unplugging according to claim 2 is characterized in that: The lifting device in step 4) includes a weight, a bracket and a lifting rod, wherein the bracket is supported on the top of the inlet side pin seat, and the weight and the seat baffle are arranged on both sides of the lifting rod.

6. The method for operating a connecting pin device for preventing movement and saving effort for plugging and unplugging according to claim 2 is characterized in that: In the step 1), when the center of the larger aperture of the double-diameter pin hole is not concentric with the circular pin hole and the connecting pin cannot be installed, the roller drawing floor is pushed toward the roller pushing floor to make the center of the larger aperture of the double-diameter pin hole concentric with the circular pin hole.

7. The method for operating a connecting pin device for preventing movement and saving effort for plugging and unplugging according to claim 2 is characterized in that: A shallow pit is set at the exit limit position in the step 5), and the push roller floor moves toward the exit side through the shallow pit at an accelerated speed.

8. The method for operating a connecting pin device for preventing movement and saving effort for plugging and unplugging according to claim 2 is characterized in that: A hydraulic pushing device is arranged on one side of the roller floor, and the hydraulic pushing device pushes the roller floor, so that the roller floor moves and is connected to the pushing roller floor.

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