Sludge recovery treatment equipment

Abstract

The invention relates to the technical field of sludge recovery, in particular to sludge recovery treatment equipment which comprises a supporting seat, an opening is formed in the supporting seat, two bottom plates which are symmetrically distributed are arranged in the opening, surrounding plates which are symmetrically distributed are fixed to the top of the supporting seat, and draining plates which are symmetrically distributed are arranged on the inner sides of the surrounding plates. Supports which are symmetrically distributed are arranged above the supporting seat, the supports are connected with a pushing mechanism, the pushing mechanism is used for pushing the two draining plates, the bottom plates are rotatably connected with the inner wall of the opening through a rotating mechanism, and when the draining plates completely extrude the sludge, the rotating mechanism is used for driving the two bottom plates to relatively rotate; when sludge is extruded to a certain degree, the two bottom plates in the opening rotate relatively, the sludge on the inner sides of the surrounding plate and the draining plate automatically passes through the opening and falls down, a worker does not need to take the dewatered sludge out of the space between the surrounding plate and the draining plate, manpower is saved, and the sludge recycling treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sludge recovery, in particular to sludge recovery and processing equipment. Background Art

[0002] Sludge recovery and treatment equipment plays a vital role in the field of environmental protection. They can effectively treat and recycle sludge, reduce environmental pollution, and realize resource reuse. It uses advanced mechanical technology and processes to effectively remove moisture from sludge and recover useful substances in it, thereby achieving sludge reduction, stabilization and harmless treatment.

[0003] One of the key steps in sludge recycling is to dehydrate the sludge. The dehydrated sludge is sent to the recycling system for reuse or safe disposal. Most existing technologies remove moisture from the sludge by mechanical pressing or centrifugal separation.

[0004] However, this dehydration method has certain defects. After the sludge is dehydrated, it is necessary to manually discharge the sludge inside the dehydration equipment, which wastes manpower and reduces the efficiency of sludge recovery and treatment. Summary of the invention

[0005] The object of the present invention is to provide a sludge recovery and treatment device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A sludge recovery and processing equipment comprises a support seat, an opening is provided inside the support seat, two symmetrically distributed bottom plates are provided inside the opening, a symmetrically distributed enclosure is fixed on the top of the support seat, a symmetrically distributed drain plate is provided inside the enclosure, and the side walls of the drain plate are slidingly connected to the inner walls of the two enclosures respectively; symmetrically distributed brackets are provided above the support seat, the brackets are connected to a driving mechanism, the driving mechanism is used to drive the brackets to move relative to each other, the brackets are connected to a pushing mechanism, the pushing mechanism is used to push the two drain plates so that the two drain plates are close to each other, the bottom plate is rotatably connected to the inner wall of the opening through a rotating mechanism, and when the drain plate finishes squeezing the sludge, the rotating mechanism is used to drive the two bottom plates to rotate relative to each other.

[0007] Preferably, the driving mechanism comprises a mounting plate fixed on the top of the support seat and symmetrically distributed, and telescopic rods are fixed on the side walls of the mounting plate, and the telescopic rods are fixedly connected to the two brackets respectively.

[0008] Preferably, the pushing mechanism comprises a push rod fixedly connected to the bracket, a baffle is fixed between the enclosure plates, and the drain plate is connected to the baffle via a buffer assembly.

[0009] Preferably: the buffer assembly includes guide rods fixedly connected to the drain plate and symmetrically distributed, the guide rods penetrate the baffle and are slidably connected to the baffle, wherein a first elastic component is provided on the outside of the guide rod, and both ends of the first elastic component are respectively fixedly connected to the baffle and the drain plate.

[0010] Preferably: a cover plate is provided above the enclosure, and symmetrically distributed sliding rods are fixed on the top of the support seat, the sliding rods pass through the cover plate and are slidably connected to the cover plate, and a second elastic component is provided on the outside of the sliding rod, and the two ends of the second elastic component are respectively fixedly connected to the cover plate and the support seat, wherein the bracket is connected to an extrusion component, and the extrusion component is used to extrude the cover plate, so that the bottom of the cover plate fits with the top of the enclosure and the top of the drain plate.

[0011] Preferably, the extrusion component comprises a support rod fixedly connected to the bracket, and a ladder frame for extruding the cover plate is fixed to the end of the support rod.

[0012] Preferably: the rotating mechanism includes a rotating rod passing through the bottom plate, the rotating rod passing through the side wall of the support seat and being rotatably connected to the side wall of the support seat, a turntable is fixed at the end of the rotating rod, a positioning groove is provided on the side wall of the turntable, a fixing plate is fixed on the side wall of the enclosure plate, a positioning rod matching the positioning groove passes through the inside of the fixing plate, a stopper is fixed at the end of the positioning rod, the stopper is connected to the fixing plate through a third elastic component, wherein the stopper is connected to a traction assembly, and when the drain plate has completed squeezing the sludge, the traction assembly is used to pull the stopper, thereby pulling the positioning rod out of the positioning groove.

[0013] Preferably, the traction assembly comprises a first magnet fixed on the top of the stopper, a connecting column is fixed on the bottom of the bracket, a second magnet is fixed on the bottom of the connecting column, and the second magnet has opposite magnetic properties to the first magnet.

[0014] Preferably: a limiting sleeve is fixed at the bottom of the support seat, a push plate passes through the inside of the limiting sleeve, the end of the push plate is rotatably connected to a movable rod, the other end of the movable rod is rotatably connected to a trapezoidal block, the trapezoidal block is connected to the support seat through a fourth elastic component, wherein a limiting rod is fixed on the top of the support seat, the upper end of the limiting rod extends into the interior of the trapezoidal block and is slidably connected to the trapezoidal block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: when dehydrating the sludge, the present invention pours the sludge between the enclosure and the drain plate, and squeezes the sludge through the drain plate to achieve the purpose of sludge dehydration, and when the sludge is squeezed to a certain extent, the two bottom plates inside the opening will rotate relative to each other, and the sludge on the inside of the enclosure and the drain plate will automatically pass through the opening and fall down, and the staff is not required to take the dehydrated sludge out from between the enclosure and the drain plate, which saves manpower and improves the efficiency of sludge recovery and treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the present invention.

[0017] Figure 2 It is a schematic diagram of the connection structure of the drain plate in an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of the push plate connection structure in an embodiment of the present invention.

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0020] In the figure: 1-support seat; 2-driving mechanism; 21-mounting plate; 22-telescopic rod; 3-pushing mechanism; 31-push rod; 32-first elastic component; 33-guide rod; 34-baffle; 35-cover plate; 36-slide rod; 37-second elastic component; 38-support rod; 39-trapezoidal frame; 4-rotating mechanism; 41-fixed plate; 42-turntable; 43-rotating rod; 44-positioning groove; 45-positioning rod; 46-third elastic component; 47-block; 48-first magnet; 49-second magnet; 410-connecting column; 411-trapezoidal block; 412-fourth elastic component; 413-limiting rod; 414-movable rod; 415-push plate; 416-limiting sleeve; 5-enclosure; 6-draining plate; 7-bracket; 8-bottom plate; 9-opening. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0023] In one embodiment, see Figure 1 and Figure 2 A sludge recovery and processing equipment comprises a support seat 1, an opening 9 is provided inside the support seat 1, two symmetrically distributed bottom plates 8 are provided inside the opening 9, a symmetrically distributed enclosure 5 is fixed on the top of the support seat 1, a symmetrically distributed drain plate 6 is provided inside the enclosure 5, and the side walls of the drain plate 6 are slidably connected with the inner walls of the two enclosure plates 5 respectively, and a symmetrically distributed bracket 7 is provided above the support seat 1, the bracket 7 is connected to a driving mechanism 2, and the driving mechanism 2 is used to drive the bracket 7 to move relative to each other, and the bracket 7 is connected to a pushing mechanism 3, and the pushing mechanism 3 is used to push the two drain plates 6 so that the two drain plates 6 are close to each other, and the bottom plate 8 is rotatably connected to the inner wall of the opening 9 through a rotating mechanism 4. When the drain plate 6 finishes squeezing the sludge, the rotating mechanism 4 is used to drive the two bottom plates 8 to rotate relative to each other.

[0024] In this embodiment, when the sludge is processed, the sludge is poured between the enclosure 5 and the drain plate 6. Initially, the bottom plate 8 is in a horizontal state and can support the sludge. After the sludge is poured in, the two brackets 7 are driven to approach each other through the driving mechanism 2, wherein the driving mechanism 2 includes a mounting plate 21 fixed to the top of the support seat 1 and symmetrically distributed, and telescopic rods 22 are fixed on the side walls of the mounting plate 21, and the telescopic rods 22 are respectively fixedly connected to the two brackets 7, and the two brackets 7 are driven to approach each other through the telescopic rods 22. When the brackets 7 approach each other, the drain plate 6 is pushed through the pushing mechanism 3, so that the drain plate 6 is close to each other. When the sludge is squeezed to a certain extent, the rotating mechanism 4 drives the two bottom plates 8 to rotate relative to each other. At this time, the opening 9 inside the supporting seat 1 is in an open state, and the sludge on the inner side of the enclosure 5 and the drain plate 6 automatically passes through the opening 9 and falls down. There is no need for the staff to take out the dehydrated sludge from between the enclosure 5 and the drain plate 6, which saves manpower and improves the sludge recovery efficiency.

[0025] See also Figure 2 The pushing mechanism 3 includes a push rod 31 fixedly connected to the bracket 7, a baffle 34 is fixed between the enclosure plates 5, and the drain plate 6 is connected to the baffle 34 through a buffer assembly; When the bracket 7 moves, it drives the push rod 31 to move toward the drain plate 6, and the push rod 31 pushes the drain plate 6, so that the drain plate 6 squeezes the sludge. When the sludge is dehydrated, the bracket 7 drives the push rod 31 away from the drain plate 6, and the drain plate 6 automatically resets under the action of the baffle 34 and the buffer assembly.

[0026] See also Figure 2 The buffer assembly includes a guide rod 33 fixedly connected to the drain plate 6 and symmetrically distributed, the guide rod 33 passes through the baffle 34 and is slidably connected to the baffle 34, wherein a first elastic component 32 is provided outside the guide rod 33, and the two ends of the first elastic component 32 are respectively fixedly connected to the baffle 34 and the drain plate 6; When the sludge dehydration is completed, the bracket 7 drives the push rod 31 away from the drain plate 6. At this time, the drain plates 6 move away from each other under the action of the first elastic component 32. The first elastic component 32 can be a spring, and the guide rod 33 can play a limiting role on the drain plate 6, which effectively improves the stability of the drain plate 6 during movement.

[0027] See also Figure 1A cover plate 35 is provided above the enclosure 5, and a symmetrically distributed slide rod 36 is fixed on the top of the support seat 1. The slide rod 36 passes through the cover plate 35 and is slidably connected to the cover plate 35. A second elastic component 37 is provided on the outside of the slide rod 36. The two ends of the second elastic component 37 are respectively fixedly connected to the cover plate 35 and the support seat 1, wherein the bracket 7 is connected to an extrusion component, and the extrusion component is used to squeeze the cover plate 35, so that the bottom of the cover plate 35 fits with the top of the enclosure 5 and the top of the drain plate 6; When dehydrating the sludge, the driving mechanism 2 drives the bracket 7 to move toward the drain plate 6. At this time, the bracket 7 squeezes the cover plate 35 through the squeezing component, so that the cover plate 35 moves downward until the bottom of the cover plate 35 is in contact with the top of the enclosure 5 and the top of the drain plate 6. The setting of the cover plate 35 can effectively prevent the sludge from overflowing from the enclosure 5 and the top of the drain plate 6 when the drain plate 6 squeezes the sludge, thereby effectively ensuring the dehydration effect of the sludge. The second elastic component 37 can be a spring, which can reset the cover plate 35, and the sliding rod 36 can limit the cover plate 35, thereby improving the stability of the cover plate 35.

[0028] See also Figure 1 The extrusion component includes a support rod 38 fixedly connected to the bracket 7, and a ladder frame 39 for extruding the cover plate 35 is fixed to the end of the support rod 38; When the bracket 7 moves, the ladder frame 39 is driven to move through the support rod 38, and the inclined surface of the ladder frame 39 is pressed against the side wall of the cover plate 35, so that the cover plate 35 moves downward and fits the top of the enclosure 5 and the drain plate 6.

[0029] See also Figure 3 and Figure 4 The rotating mechanism 4 includes a rotating rod 43 that passes through the bottom plate 8, and the rotating rod 43 passes through the side wall of the support seat 1 and is rotatably connected to the side wall of the support seat 1. A rotating disk 42 is fixed to the end of the rotating rod 43, and a positioning groove 44 is provided on the side wall of the rotating disk 42. A fixing plate 41 is fixed to the side wall of the enclosure 5, and a positioning rod 45 that is adapted to the positioning groove 44 passes through the inside of the fixing plate 41. A stopper 47 is fixed to the end of the positioning rod 45, and the stopper 47 is connected to the fixing plate 41 through a third elastic component 46, wherein the stopper 47 is connected to a traction assembly, and when the drain plate 6 finishes squeezing the sludge, the traction assembly is used to pull the stopper 47, so as to pull the positioning rod 45 out of the positioning groove 44; When the sludge is dehydrated, the bottom plate 8 is in a horizontal state, thereby supporting the sludge. At this time, the positioning rod 45 is located inside the positioning groove 44 of the side wall of the turntable 42 under the action of the stopper 47 and the third elastic component 46. The third elastic component 46 can be a spring. The positioning rod 45 can limit the turntable 42 through the positioning groove 44. The turntable 42 limits the rotation of the bottom plate 8 through the rotating rod 43, thereby ensuring the stability of the bottom plate 8. When the sludge is squeezed, the bracket 7 just drives the stopper 47 to move upward through the traction assembly, thereby pulling the positioning rod 45 out of the positioning groove 44. Without the limitation of the positioning rod 45, the bottom plate 8 automatically flips downward under the action of the sludge gravity. At this time, the sludge between the enclosure 5 and the drain plate 6 automatically falls from the opening 9 inside the support seat 1. The staff does not need to take out the dehydrated sludge from between the enclosure 5 and the drain plate 6, which saves manpower and improves the efficiency of sludge recovery and processing.

[0030] See also Figure 3 and Figure 4 The traction assembly includes a first magnet 48 fixed to the top of the stopper 47, a connecting column 410 is fixed to the bottom of the bracket 7, and a second magnet 49 is fixed to the bottom of the connecting column 410, and the second magnet 49 has opposite magnetic properties to the first magnet 48; When the sludge is squeezed, the bracket 7 drives the second magnet 49 to move above the first magnet 48 through the connecting column 410. At this time, the second magnet 49 and the first magnet 48 attract each other, thereby driving the stopper 47 to move upward, and then pulling the positioning rod 45 out of the positioning groove 44.

[0031] See also Figure 3 A limiting sleeve 416 is fixed at the bottom of the support seat 1, and a push plate 415 is passed through the limiting sleeve 416. The end of the push plate 415 is rotatably connected to a movable rod 414, and the other end of the movable rod 414 is rotatably connected to a trapezoidal block 411. The trapezoidal block 411 is connected to the support seat 1 through a fourth elastic component 412, wherein a limiting rod 413 is fixed to the top of the support seat 1, and the upper end of the limiting rod 413 extends into the interior of the trapezoidal block 411 and is slidably connected to the trapezoidal block 411; When the sludge falls from the opening 9, the driving mechanism 2 drives the brackets 7 to move away from each other. When the brackets 7 move away to a certain extent, the brackets 7 squeeze the inclined surface of the trapezoidal block 411, so that the trapezoidal block 411 moves downward. Under the limit of the limit sleeve 416, the trapezoidal block 411 moves downward and drives the push plate 415 to move horizontally through the movable rod 414. The push plate 415 moves horizontally and squeezes the bottom of the bottom plate 8, so that the bottom plate 8 rotates until the bottom plate 8 is in a horizontal state again. When the bottom plate 8 is in a horizontal state, the positioning rod 45 enters the positioning groove 44 on the side wall of the turntable 42 again under the action of the third elastic component 46 and the stopper 47, thereby fixing the turntable 42. At this time, even if the push plate 4 15 no longer squeezes the bottom plate 8, and the bottom plate 8 can still maintain a horizontal state, and then the sludge can be poured between the enclosure 5 and the drain plate 6. After the sludge is poured, the driving mechanism 2 drives the brackets 7 to approach each other again. Without the squeezing of the brackets 7, the trapezoidal block 411 automatically resets under the action of the fourth elastic component 412, and the fourth elastic component 412 can be a spring, thereby driving the push plate 415 to automatically reset, so that the push plate 415 no longer squeezes the bottom plate 8, and then after the positioning rod 45 is pulled out from the positioning groove 44, the bottom plate 8 can automatically flip downward under the action of the sludge gravity, wherein the limiting rod 413 can play a limiting role on the trapezoidal block 411, effectively improving the stability of the trapezoidal block 411 when moving.

[0032] Working principle: When processing the sludge, pour the sludge between the enclosure 5 and the drain plate 6, and drive the two brackets 7 to approach each other through the telescopic rod 22. When the brackets 7 approach each other, the drain plate 6 is pushed by the push rod 31, so that the drain plates 6 are close to each other. The drain plate 6 can squeeze the sludge between the enclosure 5, thereby accelerating the discharge of water in the sludge, thereby improving the sludge recovery and processing efficiency. When the brackets 7 approach each other, the ladder frame 39 is driven to move through the support rod 38, and the inclined surface of the ladder frame 39 is used to squeeze the side wall of the cover plate 35, so that the cover plate 35 moves downward and fits against the top of the enclosure 5 and the drain plate 6. The setting of the cover plate 35 can effectively prevent the sludge from overflowing from the enclosure 5 and the top of the drain plate 6 when the drain plate 6 squeezes the sludge. The phenomenon of outflowing effectively ensures the dewatering effect of the sludge. When the sludge is squeezed, the bracket 7 just drives the second magnet 49 to move to the top of the first magnet 48 through the connecting column 410. At this time, the second magnet 49 and the first magnet 48 attract each other, thereby driving the stopper 47 to move upward, thereby pulling the positioning rod 45 out of the positioning groove 44. Without the limit of the positioning rod 45, the bottom plate 8 automatically flips downward under the action of the sludge gravity. At this time, the sludge between the enclosure 5 and the drain plate 6 automatically falls from the opening 9 inside the support seat 1. The staff does not need to take the dehydrated sludge out from between the enclosure 5 and the drain plate 6, which saves manpower and improves the recycling efficiency of the sludge. After the sludge falls from the opening 9, the telescopic rod 22 drives the bracket 7 to move away from each other, and the drain plate 6 and the cover plate 35 The bottom plate 8 is automatically reset, and when the bracket 7 moves away to a certain extent, the bracket 7 squeezes the inclined surface of the trapezoidal block 411, so that the trapezoidal block 411 moves downward. Under the limit of the limit sleeve 416, the trapezoidal block 411 moves downward and drives the push plate 415 to move horizontally through the movable rod 414. The push plate 415 moves horizontally and squeezes the bottom of the bottom plate 8, so that the bottom plate 8 rotates until the bottom plate 8 is in a horizontal state again. When the bottom plate 8 is in a horizontal state, the positioning rod 45 enters the positioning groove 44 on the side wall of the turntable 42 again, thereby adjusting the turntable 4 2 plays a fixing role. At this time, even if the push plate 415 no longer squeezes the bottom plate 8, the bottom plate 8 can still maintain a horizontal state, and then the sludge can be poured between the enclosure plate 5 and the drain plate 6. After the sludge is poured, the telescopic rod 22 drives the brackets 7 to approach each other again. Without the squeezing of the brackets 7, the trapezoidal block 411 automatically resets, and then drives the push plate 415 to automatically reset, so that the push plate 415 no longer squeezes the bottom plate 8, and then after the positioning rod 45 is pulled out from the inside of the positioning groove 44, the bottom plate 8 can automatically flip downward under the action of the sludge gravity.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge recovery and treatment device, comprising a support seat; characterized in that: The support seat is provided with an opening inside, and two symmetrically distributed bottom plates are provided inside the opening; a symmetrically distributed enclosure is fixed on the top of the support seat, and a symmetrically distributed drain plate is provided on the inner side of the enclosure; the side walls of the drain plate are slidingly connected with the two inner walls of the enclosure respectively; symmetrically distributed brackets are provided above the support seat, and the brackets are connected with a driving mechanism, which is used to drive the brackets to move relative to each other; the brackets are connected with a pushing mechanism, which is used to push the two drain plates so that the two drain plates are close to each other; the bottom plate is rotatably connected to the inner wall of the opening through a rotating mechanism; when the drain plate finishes squeezing the sludge, the rotating mechanism is used to drive the two bottom plates to rotate relative to each other.

2. A sludge recovery and treatment equipment according to claim 1, characterized in that: The driving mechanism comprises a mounting plate fixed on the top of the support seat and symmetrically distributed, and telescopic rods are fixed on the side walls of the mounting plate, and the telescopic rods are fixedly connected to the two brackets respectively.

3. The sludge recovery and treatment equipment according to claim 1, characterized in that: The pushing mechanism comprises a push rod fixedly connected to the bracket, a baffle is fixed between the enclosure plates, and the drain plate is connected to the baffle via a buffer assembly.

4. The sludge recovery and treatment equipment according to claim 3 is characterized in that: The buffer assembly includes a guide rod fixedly connected to the drain plate and symmetrically distributed, the guide rod passes through the baffle and is slidably connected to the baffle, wherein a first elastic component is provided on the outside of the guide rod, and both ends of the first elastic component are respectively fixedly connected to the baffle and the drain plate.

5. A sludge recovery and treatment equipment according to claim 3 or 4, characterized in that: A cover plate is provided above the enclosure, and symmetrically distributed sliding rods are fixed on the top of the support seat. The sliding rods penetrate the cover plate and are slidably connected to the cover plate. A second elastic component is provided on the outside of the sliding rods, and the two ends of the second elastic component are respectively fixedly connected to the cover plate and the support seat, wherein the bracket is connected to an extrusion component, and the extrusion component is used to extrude the cover plate so that the bottom of the cover plate fits with the top of the enclosure and the top of the drain plate.

6. The sludge recovery and treatment equipment according to claim 5, characterized in that: The extrusion component comprises a support rod fixedly connected to the bracket, and a ladder frame for extruding the cover plate is fixed on the end of the support rod.

7. The sludge recovery and treatment equipment according to claim 1, characterized in that: The rotating mechanism includes a rotating rod passing through the bottom plate, the rotating rod passing through the side wall of the support seat and being rotatably connected to the side wall of the support seat, a turntable is fixed at the end of the rotating rod, a positioning groove is provided on the side wall of the turntable, a fixing plate is fixed on the side wall of the enclosure plate, a positioning rod adapted to the positioning groove passes through the inside of the fixing plate, a stopper is fixed at the end of the positioning rod, the stopper is connected to the fixing plate through a third elastic component, wherein the stopper is connected to a traction assembly, and when the drain plate finishes squeezing the sludge, the traction assembly is used to pull the stopper, thereby pulling the positioning rod out of the positioning groove.

8. The sludge recovery and treatment equipment according to claim 7, characterized in that: The traction assembly comprises a first magnet fixed on the top of the stopper, a connecting column is fixed on the bottom of the bracket, a second magnet is fixed on the bottom of the connecting column, and the second magnet has opposite magnetic properties to the first magnet.

9. The sludge recovery and treatment equipment according to claim 8, characterized in that: A limiting sleeve is fixed at the bottom of the support seat, a push plate passes through the inside of the limiting sleeve, the end of the push plate is rotatably connected to a movable rod, the other end of the movable rod is rotatably connected to a trapezoidal block, the trapezoidal block is connected to the support seat through a fourth elastic component, wherein a limiting rod is fixed on the top of the support seat, the upper end of the limiting rod extends into the interior of the trapezoidal block and is slidably connected to the trapezoidal block.

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