Device for collecting fly ash to prepare composite catalyst

Abstract

The invention relates to a device for collecting fly ash to prepare a composite catalyst, the device comprises a dust collection assembly, a microwave assembly, a reaction assembly and a porous metal plate, the dust collection assembly comprises a dust collection box and two gas-liquid atomizers, the side wall of the dust collection box is provided with a gas inlet end, the bottom of the dust collection box is provided with a dust collection end, and the top of the dust collection box is provided with an exhaust end; the two gas-liquid atomizers are arranged on the two sides of the dust collection box, the gas-liquid jet ends of the two gas-liquid atomizers are oppositely arranged, the feeding end of the microwave assembly is communicated with the dust collection end of the dust collection box, the reaction assembly comprises a reaction tank and a stirrer, the feeding end of the reaction tank is communicated with the discharging end of the microwave assembly, the stirrer is installed on the reaction tank, and the feeding end of the reaction tank is communicated with the discharging end of the microwave assembly. The stirring end of the stirrer extends into the reaction tank, and the porous metal plate is arranged in the reaction tank; the gas-liquid opposite spraying dust collection assembly can efficiently collect fly ash in flue gas under low energy consumption, and the fly ash is prepared into a low-carbon olefin efficient catalyst with natural gas and coal as raw materials, and the value degree is high.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power generation and waste material recycling, and in particular to a device for collecting fly ash to prepare a composite catalyst. Background Art

[0002] With the rapid development of thermal power plants, the output of fly ash is increasing year by year. Therefore, the recycling and reuse of fly ash has become an inevitable trend.

[0003] In the process of collecting fly ash in flue gas, the use of electrostatic precipitator equipment has problems such as large working resistance and high energy consumption. At the same time, other flue gas purification solutions such as cyclone dust collector, bag dust collector, etc. all have the problem of high energy consumption.

[0004] In terms of the comprehensive utilization of fly ash, it is mainly used in building materials, such as road construction, mine backfilling, and as a mixed material for cement, etc., where there is low added value. In addition, fly ash contains metal oxides, which will have an impact on the surrounding environment.

[0005] In summary, the existing scheme has the problem of high energy consumption when collecting fly ash, and at the same time, the utilization value of fly ash is low. Summary of the invention

[0006] In view of this, it is necessary to provide a device for collecting fly ash to prepare a composite catalyst, so as to solve the problem of high energy consumption when collecting fly ash in the existing solution and the problem of low utilization value of fly ash.

[0007] The invention provides a device for collecting fly ash to prepare a composite catalyst, comprising a dust collecting component, a microwave component, a reaction component and a porous metal plate, wherein the dust collecting component comprises a dust collecting box and two gas-liquid atomizers, wherein the side wall of the dust collecting box is provided with an air inlet end, the bottom thereof is provided with a dust collecting end and the top thereof is provided with an exhaust end, the two gas-liquid atomizers are arranged on both sides of the dust collecting box and the gas-liquid jet ends of the two are arranged oppositely, the air inlet end of the dust collecting box is directly facing the intersection of the gas-liquid jets of the two gas-liquid atomizers, the feed end of the microwave component is connected with the dust collecting end of the dust collecting box for drying the fly ash and making the fly ash react under microwaves, the reaction component comprises a reaction tank and a stirrer, the feed end of the reaction tank is connected with the discharge end of the microwave component, the stirrer is installed on the reaction tank, the stirring end of the stirrer extends into the reaction tank, and the porous metal plate is built in the reaction tank for adsorbing the catalyst generated by the reaction in the reactor.

[0008] Furthermore, the gas-liquid atomizer includes a gas-liquid conduit and an atomizing nozzle, one end of the gas-liquid conduit is used to connect the gas-liquid mixture, and the other end of the gas-liquid conduit is connected to the atomizing nozzle, and the atomizing nozzle is arranged in the dust collecting box and arranged in an inclined downward direction. The intersection of the gas-liquid jets guided by the two atomizing nozzles is located directly above the dust collecting end.

[0009] Furthermore, the dust collecting assembly also includes a dust collecting hopper installed at the bottom of the dust collecting box, the opening of the dust collecting hopper faces upward, and the dust collecting hopper is the dust collecting end.

[0010] Furthermore, the microwave assembly includes a conduit, a microwave generator, a one-way valve and a fan, one end of the conduit is connected to the dust collecting end, the other end of the conduit extends into the reactor and is equipped with a one-way valve, the microwave generator is installed in the conduit, the air outlet of the fan is connected to the conduit and the connection is arranged at a position between the microwave generator and the one-way valve.

[0011] Furthermore, the reaction assembly also includes a support plate fixedly arranged in the middle part of the reaction tank, the support plate is fixedly connected to the inner wall of the reactor via a plurality of connecting blocks on all sides, and a plurality of slots for connecting a plurality of the porous metal plates are formed on the support plate.

[0012] Furthermore, the agitator includes a motor, a first bevel gear, a rotating shaft, a second bevel gear and a first impeller. The motor is installed on the top of the reactor, the output end of the motor is connected to the first bevel gear, the rotating shaft is coaxially arranged in the reactor and rotatably connected to the reactor, the second bevel gear and the first impeller are both installed on the rotating shaft, and the first bevel gear and the second bevel gear are meshingly connected.

[0013] Furthermore, the agitator also includes a sleeve, a third bevel gear and a second impeller. The sleeve is sleeved on the rotating shaft and is circumferentially rotatably connected to the rotating shaft. The third bevel gear and the second impeller are both installed on the sleeve. The third bevel gear is meshingly connected to the first bevel gear. The direction of rotation of the third bevel gear is opposite to that of the second bevel gear. The second impeller is located above the first impeller.

[0014] Furthermore, the agitator also includes a chassis fixedly connected to the bottom end of the rotating shaft, the bottom of the chassis is rotatably connected to the inner bottom wall of the reactor, and the top of the chassis forms a plurality of strip-shaped protrusions evenly arranged along its circumference.

[0015] Furthermore, the device also includes a material moving assembly, which includes a lifting platform, a connecting plate, a clamp and a transverse moving member. The connecting plate is slidably connected to the lifting platform in a horizontal direction close to or away from the reactor, and one end of the connecting plate close to the reactor is connected to the clamp. The transverse moving member is installed on the lifting platform, and the output end of the transverse moving member is connected to the connecting plate to drive the connecting plate to slide.

[0016] Furthermore, the material moving assembly also includes a rotating member, which includes a first rotating rod, a second rotating rod and a connecting member. One end of the first rotating rod is hinged to the lifting platform, the other end of the first rotating rod is hinged to one end of the second rotating rod, and the other end of the second rotating rod is connected to the clamping claw via the connecting member. The connecting member is installed on the connecting plate. When the first rotating rod and the second rotating rod move relative to each other, the connecting member drives the clamping claw to rotate.

[0017] Compared with the prior art, the flue gas is introduced into the intersection of the gas-liquid jets discharged from two gas-liquid atomizers in the dust collecting box, and the fly ash vibrates and gathers toward the middle under the action of the two gas-liquid jets. As the fly ash adsorbs droplets and grows, when the mass of the droplets is large enough, they fall into the microwave component to be dried and activated by reaction. The activated fly ash is put into a reactor filled with aluminum sulfate solution as a raw material, and with the stirring of the agitator, it reacts to form a molecular sieve, i.e., a composite catalyst. The molecular sieve is evenly adsorbed to the porous metal plate for easy collection. The above-mentioned gas-liquid counter-spraying dust collecting component can efficiently collect fly ash in flue gas with low energy consumption, and prepare the fly ash into an efficient catalyst for low-carbon olefins using natural gas and coal as raw materials, which has high value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a device for collecting fly ash to prepare a composite catalyst provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a dust collecting assembly in a device for collecting fly ash to prepare a composite catalyst provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a reaction assembly in a device for collecting fly ash to prepare a composite catalyst provided in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of an agitator in a device for collecting fly ash to prepare a composite catalyst provided in an embodiment of the present invention; Figure 5 A schematic structural diagram of a material transfer assembly in a device for collecting fly ash to prepare a composite catalyst provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0020] like Figure 1-3 As shown, a device for collecting fly ash to prepare a composite catalyst provided by the present invention comprises a dust collecting component 100, a microwave component 200, a reaction component 300 and a porous metal plate 400, wherein the dust collecting component 100 comprises a dust collecting box 110 and two gas-liquid atomizers 120, wherein the side wall of the dust collecting box 110 is provided with an air inlet end, the bottom thereof is provided with a dust collecting end 111 and the top thereof is provided with an exhaust end 112, the two gas-liquid atomizers 120 are provided on both sides of the dust collecting box 110 and the gas-liquid jet ends of the two are provided oppositely, the air inlet end of the dust collecting box 110 is directly facing the two gas-liquid atomizers At the intersection of the gas-liquid jet of the device 120, the feed end of the microwave component 200 is connected with the dust collecting end 111 of the dust collecting box 110 to dry the fly ash and make the fly ash react under the microwave. The reaction component 300 includes a reaction tank 310 and an agitator 320. The feed end of the reaction tank 310 is connected with the discharge end of the microwave component 200. The agitator 320 is installed on the reaction tank 310. The stirring end of the agitator 320 extends into the reaction tank 310. The porous metal plate 400 is built into the reaction tank 310 to adsorb the catalyst generated by the reaction in the reactor.

[0021] During implementation, the flue gas is introduced into the intersection of the gas-liquid jets discharged from the two gas-liquid atomizers 120 in the dust collecting box 110. The fly ash vibrates and gathers toward the middle under the action of the two gas-liquid jets. As the fly ash absorbs droplets and grows, when the mass of the droplets is large enough, they fall into the microwave component 200 to be dried and activated by reaction. The activated fly ash is put into the reactor containing aluminum sulfate solution as a raw material, and with the stirring of the agitator 320, it reacts to form a molecular sieve, i.e., a composite catalyst. The molecular sieve is uniformly adsorbed to the porous metal plate 400 for easy collection. The above-mentioned gas-liquid dual-spray dust collecting component 100 can efficiently collect fly ash in flue gas with low energy consumption, and prepare the fly ash into an efficient catalyst for low-carbon olefins using natural gas and coal as raw materials, which has high value.

[0022] The dust collecting assembly 100 in this embodiment is used to collect fly ash in the flue gas, and the fly ash is mixed with the liquid by spraying the gas-liquid fluid, thereby realizing the function of collecting the fly ash. Specifically, the dust collecting assembly 100 includes a dust collecting box 110 and two gas-liquid atomizers 120, the side wall of the dust collecting box 110 is provided with an air inlet end, the bottom thereof is provided with a dust collecting end 111, and the top thereof is provided with an exhaust end 112, the two gas-liquid atomizers 120 are provided on both sides of the dust collecting box 110, and the gas-liquid jet ends of the two are arranged oppositely, and the air inlet end of the dust collecting box 110 is directly facing the intersection of the gas-liquid jets of the two gas-liquid atomizers 120.

[0023] The fly ash vibrates and gathers toward the middle under the action of the two gas-liquid jets. As the fly ash adsorbs the liquid droplets and grows, when the droplets are large enough, they fall to the dust collecting end 111. At the same time, the light fly ash and smoke are discharged from the exhaust end 112 above.

[0024] In one embodiment, the gas-liquid atomizer 120 includes a gas-liquid conduit 121 and an atomizing nozzle 122. One end of the gas-liquid conduit 121 is used to connect the gas-liquid mixture, and the other end of the gas-liquid conduit 121 is connected to the atomizing nozzle 122. The atomizing nozzle 122 is arranged in the dust collecting box 110 and is arranged in an inclined downward direction. The intersection of the gas-liquid jets guided by the two atomizing nozzles 122 is located directly above the dust collecting end 111.

[0025] Considering that fly ash particles have a certain degree of adhesion and are easy to adhere to the edge of the dust collecting end 111, the above-mentioned atomizing nozzle 122 is set at an angle, which increases the time that the fly ash dust stays in the collision interval (the intersection of the gas-liquid jet). However, the limitation is that the spray cavity of the atomizing nozzle 122 cannot be too large, and the distance between the two atomizing nozzles 122 should be maintained at 0.2-0.25m.

[0026] In one embodiment, the dust collecting assembly 100 further includes a dust collecting hopper installed at the bottom of the dust collecting box 110 , the opening of the dust collecting hopper faces upward, and the dust collecting hopper is a dust collecting end 111 .

[0027] The microwave assembly 200 in this embodiment is used to dry fly ash and activate the fly ash under the action of microwaves.

[0028] In one embodiment, the microwave assembly 200 includes a conduit, a microwave generator, a one-way valve and a fan. One end of the conduit is connected to the dust collecting end 111, and the other end of the conduit extends into the reactor and is equipped with a one-way valve. The microwave generator is installed in the conduit, and the air outlet of the fan is connected to the conduit and the connection is set at a position between the microwave generator and the one-way valve.

[0029] It is understandable that the one-way valve and the fan mentioned above may be replaced by other structures to introduce the fly ash dried and activated by the microwave generator into the reactor.

[0030] The reaction assembly 300 in this embodiment includes a reaction tank 310 and an agitator 320 . The feed end of the reaction tank 310 is connected to the discharge end of the microwave assembly 200 . The agitator 320 is installed on the reaction tank 310 , and the stirring end of the agitator 320 extends to the reaction tank 310 .

[0031] The fly ash flue gas (dried and activated fly ash) is introduced into the reactor, and the stirring end of the stirring component causes the bubbles to burst, thereby increasing the contact area between the flue gas and the reaction liquid (aluminum sulfate solution), improving the reaction rate, and generating a highly efficient catalyst for low-carbon olefins using natural gas and coal as raw materials.

[0032] To facilitate the placement of the porous metal plate 400, the reaction assembly 300 in this embodiment also includes a support plate 311 fixedly arranged in the middle part of the reaction tank 310. The four sides of the support plate 311 are fixedly connected to the inner wall of the reactor via multiple connecting blocks, and multiple card slots for connecting multiple porous metal plates 400 are formed on the support plate 311.

[0033] like Figure 4 As shown, in one embodiment, the agitator 320 includes a motor 321, a first bevel gear 322, a rotating shaft 323, a second bevel gear 324 and a first impeller 325. The motor 321 is installed on the top of the reactor, and the output end of the motor 321 is connected to the first bevel gear 322. The rotating shaft 323 is coaxially arranged in the reactor and rotatably connected to the reactor. The second bevel gear 324 and the first impeller 325 are both installed on the rotating shaft 323, and the first bevel gear 322 and the second bevel gear 324 are meshingly connected.

[0034] Among them, the agitator 320 also includes a sleeve 326, a third bevel gear 327 and a second impeller 328. The sleeve 326 is sleeved on the rotating shaft 323 and is rotatably connected to the rotating shaft 323 along the circumferential direction. The third bevel gear 327 and the second impeller 328 are both installed on the sleeve 326. The third bevel gear 327 is meshingly connected with the first bevel gear 322. The direction of the third bevel gear 327 is opposite to that of the second bevel gear 324. The second impeller 328 is located above the first impeller 325.

[0035] The agitator 320 adopts a concentric dual-shaft stirring method, which can exert a greater shear force on the bubbles, causing the bubbles to burst, thereby improving the reaction rate and product quality.

[0036] In one embodiment, the agitator 320 further includes a chassis 239 fixedly connected to the bottom end of the rotating shaft 323, the bottom of the chassis 239 is rotatably connected to the inner bottom wall of the reactor, and the top of the chassis 239 forms a plurality of strip-shaped protrusions evenly arranged along its circumference.

[0037] like Figure 5As shown, in order to facilitate the removal of the porous metal plate 400 to achieve a continuous production process, the device in this embodiment also includes a material moving component 500, which includes a lifting platform 510, a connecting plate 520, a clamp 530 and a transverse member 540. The connecting plate 520 is slidably connected to the lifting platform 510 in a horizontal direction close to or away from the reactor. The end of the connecting plate 520 close to the reactor is connected to the clamp 530, and the transverse member 540 is installed on the lifting platform 510. The output end of the transverse member 540 is connected to the connecting plate 520 to drive the connecting plate 520 to slide.

[0038] In one embodiment, the transverse moving member 540 includes a cylinder 541 and a cross bar 542. The cylinder 541 is installed on the lifting platform 510. The output end of the cylinder 541 is connected to the connecting plate 520 via the cross bar 542, which is used to drive the connecting plate 520 to slide in a horizontal direction close to or away from the reactor.

[0039] In one embodiment, the material moving assembly 500 also includes a rotating member 550, which includes a first rotating rod 551, a second rotating rod 552 and a connecting member 553. One end of the first rotating rod 551 is hinged to the lifting platform 510, and the other end of the first rotating rod 551 is hinged to one end of the second rotating rod 552. The other end of the second rotating rod 552 is connected to the clamp 530 via the connecting member 553. The connecting member 553 is installed on the connecting plate 520. When the first rotating rod 551 and the second rotating rod 552 move relative to each other, the connecting member 553 drives the clamp 530 to rotate.

[0040] Among them, the connecting member 553 includes a first connecting shaft, a second connecting shaft, a first spur gear and a second spur gear. The top end of the first connecting shaft is fixedly connected to the end of the second rotating rod 552 away from the first rotating rod 551, the bottom end of the first connecting shaft is rotatably connected to the connecting plate 520, the second connecting shaft is rotatably connected to the connecting plate 520, and the bottom end of the second connecting shaft is connected to the clamping claw 530, the first spur gear and the second spur gear are respectively mounted on the first connecting shaft and the second connecting shaft, and the first spur gear and the second spur gear are meshingly connected.

[0041] When the cylinder 541 drives the connecting plate 520 to move toward the direction approaching the reactor, the first rotating rod 551 and the second rotating rod 552 swing accordingly, and at the same time drive the first connecting shaft to rotate, and drive the second connecting shaft to rotate under the transmission action of the first spur gear and the second spur gear, and drive the clamping jaw 530 connected thereto to rotate, so as to adjust the gripping angle of the clamping jaw 530; conversely, when the cylinder 541 drives the connecting plate 520 to move away from the reactor, it can also drive the clamping jaw 530 to rotate.

[0042] Through the above arrangement, only one cylinder 541 is provided to drive the clamp 530 to move horizontally and to rotate, so as to adjust the angle at which the clamp 530 grabs the porous metal plate 400 and the angle at which the porous metal plate 400 is placed on the conveyor belt.

[0043] It is understandable that the clamping jaws 530 may adopt a closed clamping structure using hydraulic pressure or other methods, and this is not limited.

[0044] Compared with the prior art: the flue gas is introduced into the intersection of the gas-liquid jets discharged from the two gas-liquid atomizers 120 in the dust collecting box 110, and the fly ash vibrates and gathers toward the middle under the action of the two gas-liquid jets. As the fly ash adsorbs droplets and grows, when the mass of the droplets is large enough, they fall into the microwave component 200 to be dried and activated by reaction. The activated fly ash is put into the reactor containing aluminum sulfate solution as a raw material, and with the stirring of the agitator 320, it reacts to form a molecular sieve, i.e., a composite catalyst. The molecular sieve is uniformly adsorbed to the porous metal plate 400 for easy collection. The above-mentioned gas-liquid dual-spray dust collecting component 100 can efficiently collect fly ash in flue gas with low energy consumption, and prepare the fly ash into an efficient catalyst for low-carbon olefins using natural gas and coal as raw materials, which has high value.

[0045] 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 changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A device for collecting fly ash to prepare a composite catalyst, characterized in that: include: A dust collecting assembly, comprising a dust collecting box and two gas-liquid atomizers, wherein the side wall of the dust collecting box is provided with an air inlet end, the bottom thereof is provided with a dust collecting end, and the top thereof is provided with an air exhaust end, the two gas-liquid atomizers are provided on both sides of the dust collecting box and the gas-liquid jet ends of the two are arranged oppositely, and the air inlet end of the dust collecting box is directly facing the intersection of the gas-liquid jets of the two gas-liquid atomizers; A microwave component, the feed end of which is connected to the dust collecting end of the dust collecting box, so as to dry the fly ash and make the fly ash react under the microwave; A reaction assembly, comprising a reaction tank and a stirrer, wherein a feed end of the reaction tank is connected to a discharge end of the microwave assembly, the stirrer is mounted on the reaction tank, and a stirring end of the stirrer extends into the reaction tank; The porous metal plate is built in the reaction tank to adsorb the catalyst generated by the reaction in the reaction kettle.

2. The device for collecting fly ash to prepare composite catalyst according to claim 1, characterized in that: The gas-liquid atomizer includes a gas-liquid conduit and an atomizing nozzle, one end of the gas-liquid conduit is used to connect the gas-liquid mixture, and the other end of the gas-liquid conduit is connected to the atomizing nozzle. The atomizing nozzle is arranged in the dust collecting box and arranged in an inclined downward direction. The intersection of the gas-liquid jets guided by the two atomizing nozzles is located directly above the dust collecting end.

3. The device for collecting fly ash to prepare composite catalyst according to claim 1, characterized in that: The dust collecting assembly also includes a dust collecting hopper installed at the bottom of the dust collecting box, the opening of the dust collecting hopper faces upward, and the dust collecting hopper is the dust collecting end.

4. The device for collecting fly ash to prepare composite catalyst according to claim 1, characterized in that: The microwave assembly includes a conduit, a microwave generator, a one-way valve and a fan. One end of the conduit is connected to the dust collecting end, the other end of the conduit extends into the reactor and is equipped with a one-way valve. The microwave generator is installed in the conduit, and the air outlet of the fan is connected to the conduit and the connection is arranged at a position between the microwave generator and the one-way valve.

5. The device for collecting fly ash to prepare composite catalyst according to claim 1, characterized in that: The reaction assembly also includes a support plate fixedly arranged in the middle part of the reaction tank, the support plate is fixedly connected to the inner wall of the reaction kettle via a plurality of connecting blocks, and a plurality of slots for connecting a plurality of the porous metal plates are formed on the support plate.

6. The device for collecting fly ash to prepare composite catalyst according to claim 1, characterized in that: The agitator includes a motor, a first bevel gear, a rotating shaft, a second bevel gear and a first impeller. The motor is installed on the top of the reactor, and the output end of the motor is connected to the first bevel gear. The rotating shaft is coaxially arranged in the reactor and rotatably connected to the reactor. The second bevel gear and the first impeller are both installed on the rotating shaft, and the first bevel gear and the second bevel gear are meshed and connected.

7. The device for collecting fly ash to prepare composite catalyst according to claim 6, characterized in that: The agitator also includes a sleeve, a third bevel gear and a second impeller. The sleeve is sleeved on the rotating shaft and is circumferentially rotatably connected to the rotating shaft. The third bevel gear and the second impeller are both installed on the sleeve. The third bevel gear is meshingly connected to the first bevel gear. The direction of rotation of the third bevel gear is opposite to that of the second bevel gear. The second impeller is located above the first impeller.

8. The device for collecting fly ash to prepare composite catalyst according to claim 7, characterized in that: The stirrer also includes a chassis fixedly connected to the bottom end of the rotating shaft, the bottom of the chassis is rotatably connected to the inner bottom wall of the reactor, and the top of the chassis forms a plurality of strip-shaped protrusions evenly arranged along its circumference.

9. The device for collecting fly ash to prepare composite catalyst according to claim 1, characterized in that: The device also includes a material moving assembly, which includes a lifting platform, a connecting plate, a clamp and a transverse member. The connecting plate is slidably connected to the lifting platform in a horizontal direction close to or away from the reactor, and one end of the connecting plate close to the reactor is connected to the clamp. The transverse member is installed on the lifting platform, and the output end of the transverse member is connected to the connecting plate to drive the connecting plate to slide.

10. The device for collecting fly ash to prepare composite catalyst according to claim 9, characterized in that: The material moving assembly also includes a rotating member, which includes a first rotating rod, a second rotating rod and a connecting member. One end of the first rotating rod is hinged to the lifting platform, the other end of the first rotating rod is hinged to one end of the second rotating rod, and the other end of the second rotating rod is connected to the clamping claw via the connecting member. The connecting member is installed on the connecting plate. When the first rotating rod and the second rotating rod move relative to each other, the connecting member drives the clamping claw to rotate.

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