CN114038716B - A pressing plate device based on relay protection - Google Patents

Abstract

The invention relates to the technical field of electric power equipment, and discloses a relay protection-based pressing plate device, including a device main body, a connecting valve, a platform, a joint, a switch knife, a reset device, a positioning device and an abdication device. Based on the pressing plate device for relay protection, the sliding column drives the block by rotating the rotary valve, the pointer observes that the blocking block is out of the positioning groove, and the rotary valve is lifted to drive the sliding column away from the inflection point of the slide rail, and the locked state of the torsion spring is released. When the positioning object is lost, it starts to reset and drives the switch knife to disconnect, which achieves the beneficial effect of not needing to directly contact the switch knife when the contact is disconnected. The bottom of the sliding column contacts the slide rail, and the block is inserted into the positioning slot when the sliding column enters. The positioning groove and the positioning block make the sliding column connected to the tail end synchronously positioned. The sliding column continues to move inside the slide rail. After the switch knife touches the other end of the joint, the sliding column snaps into the corner of the "L"-shaped slide rail to form a lock. , the beneficial effect of not loosening after closing the knife is achieved.

Description

A pressing plate device based on relay protection

technical field

The invention relates to the technical field of electric power equipment, in particular to a pressing plate device based on relay protection.

Background technique

The protection pressure plate is also called the protection connection piece, or the trip pressure plate, which is the bridge and link for the protection device to connect with the external wiring, and it is related to whether the protection function and the action outlet can work normally. The pressure plate is a disconnection point visible to the naked eye, which is convenient for operators to judge the trip circuit of the relay protection device and whether the trip coil of the switch (circuit breaker) can be connected, which provides great convenience for maintenance and operation, but also makes the substation In the protection system of the system, a disconnection point that cannot be completely closed loop is added. Due to the particularity of the relay protection tripping pressure plate, under normal conditions (no trip command), both sides cannot be charged at the same time. The throwing and withdrawing of the pressure plate is manually operated, and it is completely checked by the sense of responsibility and actual technical level of the operating personnel.

At present, when the operator opens and closes the pressure plate, the existing pressure plate is manually moved, and the block on the top surface of the switch knife must be pressed and turned to move the switch knife and then disconnect the two sides, resulting in the need for the staff to directly touch the switch knife manually. , has a certain degree of danger, and at the same time, the existing switch knife only relies on the switch knife bayonet to clamp the breakpoint on the other side, which will easily cause the switch knife to loosen in the event of an emergency. After use, it will cause the joint to become brittle and easy to break when opening and closing.

Contents of the invention

(1) Solved technical problems

Aiming at the deficiencies of the prior art, the present invention provides a pressing plate device based on relay protection, which does not need to directly contact the switch knife when the contact is broken, and will not loosen after closing the switch knife, and the connection of the switch knife will not be embrittled The advantages of preventing accidents and the like solve the problems of the above-mentioned technologies.

(2) Technical solutions

In order to achieve the above object, the present invention provides the following technical solutions: a pressing plate device based on relay protection, including a device main body, a connecting valve, a platform, a joint, a knife, a reset device, a positioning device and an abdication device, the connecting valve is set On the bottom surface of the main body of the device, a platform is set on the top of the connecting valve, the platform includes a slide rail and a positioning groove, the slide rail is set on the top surface of the platform, the inner wall of the slide rail is provided with a positioning groove, and the joint is arranged on the top of the platform , the middle end of the joint is provided with a knife, and the knife includes a bearing and a bayonet, the bearing is arranged at the tail end of the knife, the bayonet is arranged at the head end of the knife, and the reset device is arranged at the middle end of the joint And connect the tail end of the switch blade, the reset device includes a torsion spring, an outer ring, a block and a telescopic rod, the torsion spring is arranged at the middle end of the joint and connected to the outer ring outside, and a block is arranged outside the outer ring, and the A telescopic rod is arranged on the back wall of the block, and the positioning device is arranged at the middle end of the knife. The positioning device includes a chute, a sliding column and a snap ring. Inside the chute, the clasp is arranged at the middle end of the sliding column and is located below the knife, the abdication device is arranged on the outer surface of the sliding column, and the abdicating device includes a block, a rotary valve and a pointer, and the block is arranged on the The bottom of the spool, the rotary valve is set on the top of the spool, and the pointer is set on both sides of the rotary valve.

Preferably, the connection valve is symmetrically installed on the bottom surface of the platform, the platform is located at the middle end of the main body of the device, and the outside of the platform is wrapped with an insulator.

Through the above technical solution, the breakpoints are connected through the connecting valve, and the main body of the device is further connected to the breakpoints at both ends, and the protection is enhanced through the insulator outside the platform.

Preferably, the insulator is a rubber sleeve, and concave-convex anti-skid stripes are provided on the outside of the rubber sleeve; concave inner arcs are provided on both sides of the rubber sleeve.

Through the above technical solution, after the rubber sleeve can be conveniently assembled, the insulation protection on the outer side of the platform can be further increased.

Preferably, the slide rail is arranged on the top surface of the platform, the slide rail is "L" shaped, and the inner wall of the slide rail is symmetrically provided with positioning grooves, and the positioning groove is located at the middle end of the slide rail and fits the clamping block inside.

Through the above technical scheme, the other end joint is connected through the switch knife, at this time, the bottom of the slide column inside the chute at the middle end of the switch knife contacts the slide rail, and the further block is inserted into the positioning slot when the slide column enters, and the block is positioned through the positioning slot. Synchronous positioning of the sliding column connected to its end to prevent deviation from the slide rail, the sliding column moves continuously inside the sliding rail, and the sliding column snaps into the corner of the "L"-shaped sliding rail after the switch knife touches the other end of the joint Form a lock.

Preferably, the joints are symmetrically installed on the front and rear ends of the top of the platform, the tail end of the knife is movably connected to the joint at either end, the outer shaft of the bearing is fixedly connected to the tail end of the knife and the inner shaft is sleeved on the top of the side wall of the joint, The bayonet is opened on the side wall of the front end of the knife.

Through the above technical scheme, the connecting valves at the bottom are respectively connected through the joints at both ends, so that the breakpoints are connected to the joints through the connecting valves, and the joints form a link after the knife is connected, and the friction between the knife and the joint is reduced through the bearing. Minimized, further bayonets are common bayonets for butt joints.

Preferably, the cross section of the bayonet is U-shaped; the block is a cylindrical structure.

Through the above technical solution, the snap-in and snap-in structures can be more easily matched, and the snap-in process can be smoother.

Preferably, the torsion spring is socketed at the middle end of the joint located at the head end of the knife, the bottom of the torsion spring is fixedly connected to the outer surface of the joint, the head end of the torsion spring is fixedly connected to the inner wall of the outer ring, and the outer ring passes through The torsion spring is rotatably connected to the middle end of the outer wall of the joint, the top surface of the outer ring is fixedly connected to the bottom surface of the knife, the block is fixedly installed in the center of the outer surface of the outer ring, and the tail end of the telescopic rod is fixedly connected to the front wall of the block and The end is connected to the outer wall of the snap ring.

Through the above technical scheme, the snap ring on the bottom surface is driven to rotate synchronously when the knife is rotated and docked, and the torsion spring on the inner side is further driven by the rotation of the snap ring, and the snap ring is driven by rebounding and reset after the torsion spring deforms and shrinks, and the snap ring is reset and rotated. Drive the switch knife to disconnect.

Preferably, the chute runs through the middle end of the top surface of the switch blade, the inner side of the chute is slidably connected to the top of the side wall of the sliding post, the bottom of the sliding post is slidably connected to the slide rail, and the inner side of the snap ring is slidably connected to the telescopic rod tail end.

Through the above-mentioned technical solution, when the switch blade is turning and the first end of the bayonet joint is docked, at this time, as the sliding column continues to slide inside the chute, the further clasp moves synchronously and gradually moves away from the telescopic rod.

Preferably, the clamping blocks are symmetrically installed on both ends of the bottom surface of the sliding column, and the clamping blocks are slidably connected to the inside of the positioning groove.

Through the above technical scheme, the sliding column is fixedly connected with the clamping block, which effectively ensures that the sliding column is limited by the clamping block when it moves inside the slide rail. Further, when the sliding column rotates to drive the clamping block to rotate, the clamping block breaks away from the positioning groove. At this time Pull out the sliding column upwards, the torsion spring loses its locator and starts to reset, and drives the switch knife to disconnect.

Preferably, the bottom surface of the rotary valve is connected to the top surface of the spool, the rotary valve is located on the top surface of the knife, and the pointer is opposite to and parallel to the block.

Through the above technical scheme, the pointer on the top surface of the rotary valve aligns the clamping block. When the connection needs to be disconnected, the sliding column drives the clamping block to rotate by rotating the rotary valve, and uses the pointer to observe that the clamping block is out of the positioning groove, and then lift up the rotary valve. The valve makes it drive the spool to break away from the inflection point of the slide rail, releasing the locked state of the torsion spring.

Compared with the prior art, the present invention provides a pressing plate device based on relay protection, which has the following

Beneficial effect:

1. Based on the pressing plate device for relay protection, the sliding column drives the block to rotate by rotating the rotary valve, and uses the pointer to observe that the block is out of the positioning groove, and then lifts up the rotary valve to drive the sliding column away from the inflection point of the slide rail, and releases the torque. In the locked state of the spring, the torsion spring loses the positioning object and starts to reset, and drives the switch knife to disconnect, achieving the beneficial effect of not needing to directly contact the switch knife when disconnecting.

2. Based on the pressure plate device for relay protection, the other end connector is connected through the switch knife. At this time, the bottom of the slide column inside the chute at the middle end of the switch knife contacts the slide rail, and the further block is inserted into the positioning slot when the slide column enters. The positioning groove locates the block, so that the sliding column connected to the tail end is positioned synchronously to prevent the sliding rail from being offset. The sliding column moves continuously inside the sliding rail, and after the switch knife touches the other end of the joint, the sliding column snaps into the "L" Locking is formed at the corner of the "shaped slide rail, which achieves the beneficial effect of not loosening after the knife is closed.

3. Based on the pressing plate device for relay protection, the friction force between the switch knife and the joint is minimized through the bearing, and the beneficial effect of preventing the joint of the switch knife from becoming brittle and preventing accidents is achieved.

Description of drawings

Fig. 1 is a schematic front sectional view of the overall structure of a specific embodiment of the present invention;

Fig. 2 is a schematic top view of the platform structure of a specific embodiment of the present invention;

Fig. 3 is a three-dimensional schematic diagram of a switch blade structure according to a specific embodiment of the present invention;

Fig. 4 is a three-dimensional schematic diagram of the outer ring structure of a specific embodiment of the present invention;

Fig. 5 is a three-dimensional schematic diagram of a telescopic rod structure according to a specific embodiment of the present invention;

Fig. 6 is a three-dimensional schematic diagram of a sliding column structure according to a specific embodiment of the present invention.

Explanation of reference signs:

1-device main body; 2-connecting valve; 3-platform; 301-slide rail; 302-positioning groove; 4-connector; 5-gate knife; 501-bearing; Spring; 602-outer ring; 603-block; 604-telescopic rod; 7-positioning device; 701-chute; valve; 803-pointer.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figure 1-6, a pressure plate device based on relay protection, including device main body 1, connecting valve 2, platform 3, joint 4, switch knife 5, reset device 6, positioning device 7 and abdication device 8, connecting valve 2 is set on the bottom surface of the main body 1 of the device, and the top of the connecting valve 2 is set with a platform 3. The platform 3 includes a slide rail 301 and a positioning groove 302. The slide rail 301 is set on the top surface of the platform 3. On the top of the platform 3, a switch knife 5 is set at the middle end of the joint 4, the switch knife 5 includes a bearing 501 and a bayonet 502, the bearing 501 is set at the tail end of the switch knife 5, the bayonet 502 is set at the head end of the switch knife 5, and the reset device 6 is set The middle end of the joint 4 is connected to the tail end of the switch knife 5. The reset device 6 includes a torsion spring 601, an outer ring 602, a block 603 and a telescopic rod 604. The outer side of the ring 602 is provided with a clamping block 603, the rear wall of the clamping block 603 is provided with a telescopic rod 604, the positioning device 7 is provided at the middle end of the switch knife 5, the positioning device 7 includes a chute 701, a sliding post 702 and a snap ring 703, and the chute 701 is provided at the On the top surface of the switch knife 5, the sliding column 702 is arranged inside the chute 701, the snap ring 703 is arranged at the middle end of the sliding column 702 and below the switch knife 5, and the abdication device 8 is arranged on the outer surface of the sliding column 702, and the abdication device 8 includes a block 801 , the rotary valve 802 and the pointer 803 , the block 801 is set on the bottom of the spool 702 , the rotary valve 802 is set on the top of the spool 702 , and the pointer 803 is set on both sides of the rotary valve 802 .

Specifically, as shown in Figure 1: the connection valve 2 is symmetrically installed on the bottom surface of the platform 3, the platform 3 is located at the middle end of the device main body 1, and the outside of the platform 3 is wrapped with an insulator. Connect the breakpoints at both ends respectively, and strengthen the protection through the insulator on the outside of platform 2.

Specifically, as shown in FIG. 1 : the insulator is a rubber sleeve, and concave-convex anti-skid stripes are provided on the outside of the rubber sleeve; concave inner arcs are provided on both sides of the rubber sleeve. Further increase the protection performance of the protection platform.

Specifically, as shown in Figures 1 and 2: the slide rail 301 is arranged on the top surface of the platform 3, the slide rail 301 is "L" shaped, and the inner side wall of the slide rail 301 is symmetrically provided with a positioning groove 302, and the positioning groove 302 is located at the middle end of the slide rail 301 and The inner side fits the block 801, and the advantage is that the other end joint 4 is connected through the switch knife 5. At this time, the bottom of the sliding column 702 inside the chute 701 at the middle end of the switch knife 5 contacts the slide rail 301, and the further locking block 801 enters the sliding column 702 at the same time. Insert the positioning slot 302, position the block 801 through the positioning slot 302, and position the sliding column 702 connected to its tail end synchronously to prevent the sliding rail 301 from shifting. 5 After contacting the connector 4 at the other end, the sliding column 702 snaps into the corner of the "L"-shaped slide rail 301 to form a lock.

Specifically, as shown in Figure 1-3: the joint 4 is symmetrically installed on the front and rear ends of the top of the platform 3, the tail end of the knife 5 is movably connected to the joint 4 at either end, and the outer shaft of the bearing 501 is fixedly connected to the tail end of the knife 5 and the inner shaft It is socketed on the top of the side wall of the joint 4, and the bayonet 502 is opened on the front side wall of the knife 5. The advantage is that the joints 4 at both ends are respectively connected to the connecting valve 2 at the bottom, so that the breakpoint is connected to the joint 4 through the connecting valve 2, and the joint 4 After the switch knife 5 is connected to form a link, the friction force between the switch knife 5 and the joint 4 is minimized through the bearing 501, and the further bayonet 502 is a common bayonet 502 for butt joint 4.

Specifically, as shown in Figures 3, 4, and 6: the cross section of the bayonet is U-shaped; the block is a cylindrical structure. The advantage is that it can make the clipping process smoother.

Specifically, as shown in Figures 1, 2, 4, and 5: the torsion spring 601 is socketed in the middle end of the joint 4 located on the head end side of the switch blade 5, the bottom of the torsion spring 601 is fixedly connected to the outer surface of the joint 4, and the head end of the torsion spring 601 Fixedly connected to the inner side wall of the outer ring 602, the outer ring 602 is rotatably connected to the middle end of the outer side wall of the joint 4 through the torsion spring 601, the top surface of the outer ring 602 is fixedly connected to the bottom surface of the switch knife 5, and the clamping block 603 is fixedly installed in the center of the outer surface of the outer ring 602, The tail end of the telescopic rod 604 is fixedly connected to the front wall of the block 603 and the first end is connected to the outer wall of the snap ring 703. The advantage is that the snap ring 703 on the bottom surface is driven to rotate synchronously when the switch knife 5 is rotated and docked, and further the rotation of the snap ring 703 drives the inner side wall. The torsion spring 601 rebounds and resets through the deformation and contraction of the torsion spring 601 to drive the snap ring 703, and the snap ring 703 resets and rotates to drive the switch knife 5 to disconnect.

Specifically, as shown in Figure 1-3: the chute 701 runs through the middle end of the top surface of the switch knife 5, the inner side of the chute 701 is slidably connected to the top of the side wall of the sliding column 702, and the bottom of the sliding column 702 is slidably connected to the slide rail 301, and the card The inner side of the ring 703 is slidably connected to the tail end of the telescopic rod 604. The advantage is that when the switch knife 5 is turned and the head end bayonet 502 is docked with the joint 4, at this time, as the sliding column 702 continues to slide in the inner side of the chute 701, further snap ring 703 moves synchronously, and gradually moves away from telescopic rod 604 .

Specifically, as shown in Figures 1, 3 and 6: the clamping block 801 is symmetrically installed on both ends of the bottom surface of the sliding column 702, and the clamping block 801 is slidably connected to the inside of the positioning groove 302. The advantage is that the sliding column 702 is fixedly connected to the clamping block 801, effectively It ensures that the sliding column 702 is limited by the clamping block 801 when the sliding column 702 moves inside the slide rail 301. Further, when the sliding column 702 rotates to drive the clamping block 801 to rotate, the clamping block 801 breaks away from the positioning groove 302. At this time, the sliding column 702 is pulled out upwards. The torsion spring 601 loses the locator and starts to reset, and drives the switch knife 5 to disconnect.

Specifically, as shown in Figures 1 and 6: the bottom surface of the rotary valve 802 is connected to the top surface of the spool 702, the rotary valve 802 is located on the top surface of the switch knife 5, and the pointer 803 is opposite to and parallel to the block 801. The advantage is that, through the rotary valve 802 The pointer 803 on the top surface is aligned with the block. When the connection needs to be disconnected, the spool 702 drives the block 603 to rotate by rotating the rotary valve 802, and the pointer 803 is used to observe that the block 603 is out of the positioning groove 302, and then the rotary valve is lifted upwards. 802 makes it drive the sliding column 702 away from the inflection point of the slide rail 301, releasing the locked state of the torsion spring 601.

When in use, as shown in Figure 1-6: the friction force between the switch knife 5 and the joint 4 is minimized through the bearing 501, and the snap ring 703 on the bottom surface is driven to rotate synchronously when the switch knife 5 is rotated and docked, and the snap ring 703 The rotation drives the inner torsion spring 601, and when the switch knife 5 is turned and the first end bayonet 502 is docked with the joint 4, at this time, as the sliding post 702 slides continuously inside the chute 701, the further snap ring 703 moves synchronously, and Gradually move away from the telescopic rod 604, and fixedly connect the sliding column 702 through the clamping block 801, which effectively ensures that the sliding column 702 is limited by the clamping block 801 when moving inside the slide rail 301, and connects the other end joint 4 through the switch knife 5. At this time, the gate The bottom of the sliding column 702 inside the chute 701 at the middle end of the knife 5 contacts the slide rail 301, and the further block 801 is inserted into the positioning groove 302 when the sliding column 702 enters, and the positioning block 801 is positioned through the positioning groove 302 so that the tail end is connected. The sliding column 702 is positioned synchronously to prevent deviation from the sliding rail 301. The sliding column 702 continues to move inside the sliding rail 301, and after the switch knife 5 touches the other end connector 4, the sliding column 702 snaps into the corner of the "L"-shaped sliding rail 301 When the connection needs to be disconnected, rotate the rotary valve 802 to make the spool 702 drive the block 603 to rotate, and use the pointer 803 to observe that the block 603 is out of the positioning groove 302, then lift the rotary valve 802 upward to drive The sliding column 702 breaks away from the inflection point of the slide rail 301, and the locked state of the torsion spring 601 is released. The torsion spring 601 loses its anchor and starts to reset, and drives the switch knife 5 to disconnect.

The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and can also be made within the scope of knowledge of those of ordinary skill in the art without departing from the gist of the present invention. These changes involve related technologies well known to those skilled in the art, and these all fall within the protection scope of the patent of the present invention.

Many other changes and modifications can be made without departing from the spirit and scope of the present invention. It should be understood that the invention is not limited to the particular embodiments, but that the scope of the invention is defined by the appended claims.

Claims (10)

1. The utility model provides a clamp plate device for relay protection, includes device main part (1), junction valve (2), platform (3), connects (4), knife switch (5), resetting means (6), positioner (7) and device (8) of returning to the position, its characterized in that: connecting valve (2) set up in device main part (1) bottom surface, connecting valve (2) top sets up platform (3), platform (3) are including slide rail (301) and constant head tank (302), slide rail (301) are seted up in platform (3) top surface, slide rail (301) inside wall sets up constant head tank (302), connect (4) to set up in platform (3) top, connect (4) middle-end to set up knife (5), knife (5) include bearing (501) and bayonet socket (502), bearing (501) set up in knife (5) tail end, bayonet socket (502) set up in knife (5) head end, resetting means (6) set up in connect (4) middle-end and connect knife (5) tail end, resetting means (6) are including torsional spring (601), outer loop (602), fixture block (603) and telescopic link (604), torsional spring (601) set up in connect outer loop (602) middle-end and outside, fixture block (603) set up outside setting up knife (603), fixture block (7) set up in knife (5) tail end (5), the setting up in chute (7) after telescopic link (7) Slide column (702) and snap ring (703), spout (701) set up in brake blade (5) top surface, slide column (702) set up in spout (701) inboard, snap ring (703) set up in slide column (702) middle-end and are located brake blade (5) below, device (8) set up in slide column (702) surface, device (8) of moving back include fixture block (801), change valve (802) and pointer (803), fixture block (801) set up in slide column (702) bottom, change valve (802) set up in slide column (702) top, pointer (803) set up in change valve (802) both sides.

2. The relay protection-based platen device according to claim 1, wherein: the connecting valve (2) is symmetrically arranged on the bottom surface of the platform (3), the platform (3) is positioned at the middle end of the device main body (1), and the insulator is wrapped on the outer side of the platform (3).

3. The relay protection-based platen device according to claim 2, wherein: the insulator is a rubber sleeve, and concave-convex anti-skid stripes are arranged outside the rubber sleeve; the two sides of the rubber sleeve are provided with concave inner arcs.

4. The relay protection-based platen device according to claim 1, wherein: the sliding rail (301) is arranged on the top surface of the platform (3), the sliding rail (301) is L-shaped, positioning grooves (302) are symmetrically formed in the inner side wall of the sliding rail (301), and the positioning grooves (302) are located at the middle end of the sliding rail (301) and are internally matched with the clamping blocks (801).

5. The relay protection-based platen device according to claim 1, wherein: the connector (4) is symmetrically arranged at the front end and the rear end of the top surface of the platform (3), the tail end of the knife switch (5) is movably connected with the connector (4) at any end, the outer shaft of the bearing (501) is fixedly connected with the tail end of the knife switch (5) and is sleeved at the top of the side wall of the connector (4) in an inner shaft manner, and the bayonet (502) is formed in the side wall of the front end of the knife switch (5).

6. The relay protection-based pressure plate device according to claim 5, wherein: the cross section of the bayonet is U-shaped; the clamping block is of a cylindrical structure.

7. The relay protection-based platen device according to claim 1, wherein: the utility model discloses a knife switch, including outer loop (602), spring (601), clamping block (603), telescopic link (604) tail end fixed connection clamping block (603) front wall and head end connection snap ring (703) lateral wall, torsion spring (601) cup joint in joint (4) middle-end that is located knife switch (5) head end one side, torsion spring (601) bottom fixed connection joint (4) surface, torsion spring (601) head end fixed connection outer loop (602) inside wall, outer loop (602) top surface fixed connection knife switch (5) bottom surface through torsion spring (601), clamping block (603) fixed mounting is in outer loop (602) surface center, clamping block (603) front wall and head end connection snap ring (703) lateral wall.

8. The relay protection-based platen device according to claim 1, wherein: the sliding groove (701) is formed in the middle end of the top surface of the knife switch (5) in a penetrating mode, the inner side of the sliding groove (701) is connected with the top of the side wall of the sliding column (702) in a sliding mode, the bottom of the sliding column (702) is connected with the sliding rail (301) in a sliding mode, and the rear wall of the clamping ring (703) is connected with the tail end of the telescopic rod (604).

9. The relay protection-based platen device according to claim 1, wherein: the clamping blocks (801) are symmetrically arranged at two ends of the bottom surface of the sliding column (702), and the clamping blocks (801) are connected to the inner side of the positioning groove (302) in a sliding mode.

10. The relay protection-based platen device according to claim 1, wherein: the bottom surface of the rotary valve (802) is connected with the top surface of the sliding column (702), the rotary valve (802) is positioned on the top surface of the knife switch (5), and the pointer (803) is opposite to and parallel to the clamping block (801).

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