A feeding device for studying the performance of nuclear grade glass fiber air filter paper

Abstract

The present invention discloses a feeding device for studying the performance of nuclear-grade glass fiber air filter paper, comprising a bracket, a reactor mounted on the bracket, and a feeding mechanism, wherein at least one feeder is arranged on the feeding mechanism, and the feeding mechanism controls the movement of the feeder so that the feeder docks with the feeding port of the reactor, and the raw materials inside the feeder are added to the reactor; the feeding port is externally connected with a feeding pipe, and the feeder comprises a cylinder, and a discharge port is provided on the cylinder, and the feeding pipe is connected and matched with the discharge port through a docking structure. The present invention facilitates the subsequent feeding of test personnel, and the test personnel do not need to climb to the upper part of the reactor to feed, thereby improving the feeding efficiency of the reactor and saving the time of experimental research.

Description

Technical Field

[0001] The invention specifically relates to the technical field of filter paper performance research, in particular to a feeding device used for nuclear-grade glass fiber air filter paper performance research. Background Art

[0002] Nuclear-grade air filters are widely used in nuclear power plants, nuclear factories, nuclear military industries and other industries. They are mainly used as air purification systems for nuclear island HVAC (heating, ventilation and air conditioning) systems and conventional islands, and are used in conjunction with purification devices such as filter boxes and filter racks to provide clean air and control radioactive pollution emissions in the air intake and exhaust systems. Due to the long development time and mature technology of foreign nuclear power, the performance and quality of nuclear-grade air filters are in the world's leading position, and their supporting filter materials also have the advantages of good performance and stable quality. The domestic air purification industry started relatively late, and the research level of filter materials is relatively low, especially in the research and development of nuclear-grade air filter materials.

[0003] The glass fiber filter paper used in nuclear-grade high-efficiency air filters is imported filter paper. Domestic filter papers are not as good as imported filter papers in terms of moisture resistance, difficulty in overpressure, hydrophobicity, wet tensile strength, high-temperature tensile strength, and tensile strength and stability after gamma-ray irradiation. Nuclear-grade high-efficiency air filters used in nuclear power plants have always been produced with imported filter paper. In order to avoid the core materials of nuclear industry air filters from being harmed by people, the national nuclear industry is stepping up the research and development of domestic alternative products.

[0004] An important research method for studying nuclear-grade high-efficiency air filter paper is to experimentally study the effects of different additives on the performance of filter paper, compound different additives, and find the most suitable proportion of raw materials in the additives. In experimental research, it is necessary to repeatedly proportion the filter paper raw materials and the additive raw materials and mix them in a reactor to prepare the product. However, the reactor in the prior art is bulky, and the feed port is generally set at the top of the reactor, which makes it very troublesome to frequently add materials to the reactor. Summary of the invention

[0005] The purpose of the present invention is to provide a feeding device for studying the performance of nuclear-grade glass fiber air filter paper, so as to solve the problem that the reactor in the prior art proposed in the above background technology is bulky and the feeding port is generally arranged at the upper part of the reactor, which makes it very troublesome to frequently feed the reactor.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A feeding device for studying the performance of nuclear-grade glass fiber air filter paper comprises a bracket, a reactor mounted on the bracket, and a feeding mechanism, wherein at least one feeder is arranged on the feeding mechanism, and the feeding mechanism controls the movement of the feeder so that the feeder is docked with the feeding port of the reactor, and the raw materials in the feeder are added to the reactor;

[0008] The feeding port is externally connected to a feeding pipe, the feeder comprises a cylinder, a discharge port is provided on the cylinder, and the feeding pipe is connected and matched with the discharge port through a docking structure;

[0009] The docking structure includes a joint fixedly mounted on the feeding pipe and a pipe head movably mounted on the discharge port. An iron ring is fixedly mounted on the outer side of the pipe head, and an annular magnet matching the iron ring is fixedly mounted on the outer side of the joint. The annular magnet attracts the iron ring to make the pipe head approach the joint and dock with the joint.

[0010] As a further solution of the present invention: the pipe head is connected to the discharge port through a connecting pipe, and the connecting pipe is an elastic tube structure.

[0011] As a further solution of the present invention: at least one connecting frame is further provided on the outer side of the cylinder, one end of the connecting frame is movably connected to the cylinder, the other end of the connecting frame is movably connected to the pipe head, and the connecting frame is a telescopic structure.

[0012] As a further solution of the present invention: a feed port is provided on the cylinder, a second cover body is detachably mounted on the feed port, the second cover body is threadedly connected to the feed port, and a knob is provided on the second cover body.

[0013] As a further solution of the present invention: a groove with an annular structure is provided on the joint, the annular magnet is fixedly installed in the groove, and a sealing ring is provided at the inner edge of the groove.

[0014] As a further solution of the present invention: the annular magnet is an electromagnet structure, an interface is provided on the lower side of the connector, the interface is electrically connected to the annular magnet, and a power supply device is also fixedly installed on the bracket, the power supply device is electrically connected to the interface through a cable to supply power to the annular magnet.

[0015] Various raw materials of nuclear-grade glass fiber air filter paper additives are added to the inside of the feeding tube through a feeder. The raw materials react in the reactor to generate additives. The additives are added as auxiliary agents in the preparation process of nuclear-grade glass fiber air filter paper to obtain products. By adding additive raw materials with different ratios, the influence of different raw material ratios on the performance of filter paper is studied. In this embodiment, the binder is taken as an example, and acrylic emulsion and silicone are used as the raw materials of the binder. The specific steps are as follows:

[0016] S100, installing at least one feeder for adding acrylic emulsion and at least one feeder for adding silicone on the feeding mechanism, and adding different amounts of acrylic emulsion or silicone into the feeder each time;

[0017] S200, adding acrylic emulsion and organosilicon into a reaction kettle through a feeder to react and obtain different adhesives;

[0018] S300, marking each binder into different groups, using the binder as the only variable to participate in the preparation of nuclear-grade glass fiber air filter paper, obtaining filter paper products of different groups, conducting performance research on the filter paper products of each group, and obtaining the optimal ratio of acrylic emulsion and silicone;

[0019] In the above step S300, the method for preparing nuclear-grade glass fiber air filter paper includes the following steps: dispersion pulping, wet forming, spraying sizing, suction and drying to obtain the product, wherein the spraying sizing uses a binder.

[0020] As a further solution of the present invention: the bracket includes a workbench and a plurality of supporting legs fixedly installed at the bottom of the workbench to support the workbench, and the reaction kettle and the feeding mechanism are both installed on the workbench.

[0021] As a further solution of the present invention: the feeding mechanism is a conveyor belt installed on the workbench, the lower side of the conveyor belt is installed on the workbench through a first mounting frame, and the upper side of the conveyor belt is installed on the workbench through a second mounting frame.

[0022] As a further solution of the present invention: a driving shaft is arranged on the lower side of the conveyor belt, and a driven shaft is arranged on the upper side of the conveyor belt, the driving shaft and the driven shaft are connected by a belt, and the driving shaft is rotatably connected to the first mounting frame, the first mounting frame is fixedly connected to the workbench, the driven shaft is rotatably connected to the second mounting frame, and the second mounting frame is fixedly connected to the workbench.

[0023] As a further solution of the present invention: a driving motor and a gear box are also installed on the workbench, and the output shaft of the driving motor is drivingly connected to the driving shaft through the gear box.

[0024] As a further solution of the present invention: the outer side of the reactor is fixedly connected to the workbench by at least one fixing frame. Specifically, the fixing frame is a square frame structure, one side of the fixing frame is fixed to the outer side of the reactor by bolts, and the bottom of the fixing frame is fixed to the workbench by fixing bolts, so that the reactor is stably fixed on the workbench;

[0025] Furthermore, the reactor is detachably provided with a first cover body, and the first cover body is provided with at least one air hole, which can be used to connect a pump device to control the air pressure inside the reactor so that the raw material reaction is in an optimal reaction environment.

[0026] As a further solution of the present invention: a mounting seat for mounting a feeder is provided on the conveyor belt, and the mounting seat includes a base fixedly mounted on the conveyor belt and two second sleeves fixedly mounted on the outside of the base, and the base is made of elastic material so that the base can move close to the curved section of the conveyor belt, and two first sleeves are fixedly mounted on the feeder, and the first sleeve is rotatably connected to the second sleeve on the same side through a connecting rod.

[0027] As a further solution of the present invention: a first rotating rod is installed inside the first sleeve, a second rotating rod is installed inside the second sleeve, one end of the connecting rod is rotatably connected to the first rotating rod, and the other end of the connecting rod is rotatably connected to the second rotating rod.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: at least one feeder is arranged on the feeding mechanism of the present invention, and the movement of the feeder is controlled by the feeding mechanism so that the feeder is docked with the feeding port of the reactor, and the raw materials inside the feeder are added to the reactor. After the feeder completes the feeding, the feeding mechanism is reset, which is convenient for the test personnel to carry out subsequent feeding. The test personnel do not need to climb to the top of the reactor to feed, thereby improving the feeding efficiency of the reactor and saving the time of experimental research. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A stereoscopic view of a feeding device used for studying the performance of nuclear-grade glass fiber air filter paper.

[0030] Figure 2 Another perspective view of the feeding device used for studying the performance of nuclear grade glass fiber air filter paper.

[0031] Figure 3 A front view of a feeding device used for studying the performance of nuclear-grade glass fiber air filter paper.

[0032] Figure 4 This is a schematic diagram of the structure of the feeder and mounting base in the feeding device used for studying the performance of nuclear-grade glass fiber air filter paper.

[0033] Figure 5 This is a front view of the feeder and mounting base in the feeding device used for studying the performance of nuclear-grade glass fiber air filter paper.

[0034] Figure 6 This is a schematic diagram of the structure of the feeding tube in the feeding device used for studying the performance of nuclear-grade glass fiber air filter paper.

[0035] In the figure: 1-reactor, 2-first cover, 21-air hole, 3-bracket, 31-support leg, 32-fixed frame, 33-workbench, 4-feeding mechanism, 41-first mounting frame, 42-second mounting frame, 43-drive motor, 44-gear box, 5-feeder, 51-cylinder, 52-feeding port, 53-second cover, 54-discharging port, 55-connecting pipe, 56-pipe head, 57-iron ring, 58-connecting frame, 59-first sleeve, 6-feeding pipe, 61-joint, 62-groove, 63-annular magnet, 64-sealing ring, 65-interface, 7-power supply equipment, 8-mounting seat, 81-base, 82-second sleeve, 83-connecting rod. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The present invention discloses a feeding device for studying the performance of nuclear-grade glass fiber air filter paper, comprising a bracket, a reactor mounted on the bracket, and a feeding mechanism, wherein at least one feeder is arranged on the feeding mechanism, and the feeding mechanism controls the movement of the feeder so that the feeder docks with the feeding port of the reactor, and the raw materials inside the feeder are added to the reactor; the feeding port is externally connected with a feeding pipe, and the feeder comprises a cylinder, and a discharge port is provided on the cylinder, and the feeding pipe is connected and matched with the discharge port through a docking structure. The present invention facilitates the subsequent feeding of test personnel, and the test personnel do not need to climb to the upper part of the reactor to feed, thereby improving the feeding efficiency of the reactor and saving the time of experimental research.

[0038] The following is a specific description in conjunction with the embodiments:

[0039] See also Figures 1 to 4 In an embodiment of the present invention, a feeding device for studying the performance of nuclear-grade glass fiber air filter paper is applied to the study of the optimal composition of nuclear-grade glass fiber air filter paper, especially to the study of the effects of additives of different types and different ratios, such as binders and hydrophobic additives, on the performance of filter paper. The feeding device for studying the performance of nuclear-grade glass fiber air filter paper comprises a bracket 3 and a reactor 1 mounted on the bracket 3, and a feeding mechanism 4. The feeding mechanism 4 is provided with at least one feeder 5. The feeding mechanism 4 controls the movement of the feeder 5 so that the feeder 5 is docked with the feeding port of the reactor 1, and the raw materials in the feeder 5 are added to the reactor;

[0040] See also Figure 2 and4 The feeding port is arranged at the upper part of the reaction kettle 1, and a feeding pipe 6 is connected to the feeding port. The feeder 5 comprises a cylinder 51, and a discharge port 54 is provided on the cylinder 51. The feeding pipe 6 is connected and matched with the discharge port 54 through a docking structure, so that the raw materials in the feeder 5 flow into the feeding port along the discharge port 54 and the feeding pipe 6;

[0041] Further, the docking structure includes a joint 61 fixedly mounted on the feeding pipe 6 and a pipe head 56 movably mounted on the discharge port 54, an iron ring 57 is fixedly mounted on the outer side of the pipe head 56, and an annular magnet 63 matched with the iron ring 57 is fixedly mounted on the outer side of the joint 61. When the feeder 5 moves and approaches the feeding pipe 6 under the drive of the feeding mechanism 4, the annular magnet 63 attracts the iron ring 57, so that the pipe head 56 approaches the joint 61 and docks with the joint 61, so that the feeder 5 is connected with the interior of the reactor through the feeding port;

[0042] It should be noted that various raw materials of nuclear-grade glass fiber air filter paper additives are added to the inside of the feeding tube 6 through the feeder 5, and the production raw materials react in the reactor 1 to generate additives. The additives are added as auxiliary agents in the preparation process of nuclear-grade glass fiber air filter paper to obtain products. By adding additive raw materials with different ratios, the influence of different raw material ratios on the performance of the filter paper is studied. In this embodiment, the binder is taken as an example, and acrylic emulsion and silicone are used as the raw materials of the binder. The specific steps are:

[0043] S100, installing at least one feeder 5 for adding acrylic emulsion and at least one feeder 5 for adding silicone on the feeding mechanism 4, and adding different amounts of acrylic emulsion or silicone into the feeder 5 each time;

[0044] S200, adding acrylic emulsion and silicone into the reaction kettle 1 through the feeder 5 to react and obtain different adhesives;

[0045] S300, marking each binder into different groups, using the binder as the only variable to participate in the preparation of nuclear-grade glass fiber air filter paper, obtaining filter paper products of different groups, conducting performance research on the filter paper products of each group, and obtaining the optimal ratio of acrylic emulsion and silicone;

[0046] In the above step S300, the method for preparing nuclear-grade glass fiber air filter paper includes the following steps: dispersion pulping, wet forming, spraying sizing, suction and drying to obtain the product, wherein the spraying sizing uses a binder.

[0047] In the embodiment of the present invention, the pipe head 56 is connected to the discharge port 54 through the connecting pipe 55. When the annular magnet 63 attracts the iron ring 57, the pipe head 56 moves under the action of the magnetic force. In order to avoid the connecting pipe 55 restricting the movement of the pipe head 56, the connecting pipe 55 is set to an elastic pipe structure, such as a bellows.

[0048] Furthermore, at least one connecting frame 58 is further provided on the outer side of the cylinder 51, one end of the connecting frame 58 is movably connected to the cylinder 51, and the other end of the connecting frame 58 is movably connected to the pipe head 56, and the connecting frame 58 is a telescopic structure. By providing the connecting frame 58, the position of the pipe head 56 is limited, and under the premise of not affecting the movement of the pipe head, the pipe head 56 is prevented from sagging due to its own gravity, thereby preventing the pipe head 56 from being unable to dock with the joint 61;

[0049] Furthermore, a feed port 52 is provided on the cylinder 51, and a second cover 53 is detachably mounted on the feed port 52. The second cover 53 is threadedly connected to the feed port 52, and a knob is provided on the second cover 53. The second cover 53 is rotated by the knob to open or close the feed port 52, so as to facilitate the addition of production raw materials into the feeder 5.

[0050] See also Figure 2 and Figure 6 The connector 61 is provided with an annular groove, and the annular magnet 63 is fixedly installed in the groove 62. When the connector 61 is connected to the pipe head 56, the iron ring 57 extends into the groove 62, thereby improving the sealing performance of the connector 61 and the pipe head 56 when they are connected;

[0051] Furthermore, a sealing ring 64 is provided at the inner edge of the groove to further improve the sealing performance when the joint 61 and the pipe head 56 are connected;

[0052] Furthermore, the annular magnet 63 is an electromagnet structure, and an interface 65 is provided on the lower side of the connector 61, and the interface 65 is electrically connected to the annular magnet 63. A power supply device 7 is also fixedly mounted on the bracket 3, and the power supply device 7 is electrically connected to the interface 65 via a cable to supply power to the annular magnet 63, so that the annular magnet 63 has a stronger magnetic force, and at the same time solves the problem that ordinary magnets lose their magnetism after long-term use.

[0053] Please refer again Figure 1-3 The support 3 includes a workbench 33 and a plurality of support legs 31 fixedly mounted at the bottom of the workbench 33 to support the workbench 33. The reactor 1 and the feeding mechanism 4 are both mounted on the workbench 33.

[0054] In the embodiment of the present invention, the feeding mechanism 4 is a conveyor belt installed on the workbench 33, the lower side of the conveyor belt is installed on the workbench 33 through a first mounting frame 41, and the upper side of the conveyor belt is installed on the workbench 33 through a second mounting frame 42, and the angle between the conveyor belt and the workbench 33 is 60-90°;

[0055] Further, a driving shaft is provided on the lower side of the conveyor belt, and a driven shaft is provided on the upper side of the conveyor belt. The driving shaft and the driven shaft are connected by a belt, and the driving shaft is rotatably connected to the first mounting frame 41, the first mounting frame 41 is fixedly connected to the workbench 33, the driven shaft is rotatably connected to the second mounting frame 42, and the second mounting frame 42 is fixedly connected to the workbench 33;

[0056] Furthermore, a driving motor 43 and a gear box 44 are also installed on the workbench 33. The output shaft of the driving motor 43 is connected to the driving shaft through the gear box 44 to drive the driving shaft to rotate, thereby driving the entire conveyor belt to move. Figure 2 As shown, in Figure 2 The direction of rotation of the drive shaft is clockwise.

[0057] Please refer again Figure 1 In the embodiment of the present invention, the outer side of the reactor 1 is fixedly connected to the workbench 33 by at least one fixing frame 32. Specifically, the fixing frame 32 is a square frame structure, one side of the fixing frame 32 is fixed to the outer side of the reactor 1 by bolts, and the bottom of the fixing frame 32 is fixed to the workbench 33 by fixing bolts, so that the reactor 1 is stably fixed on the workbench 33;

[0058] Furthermore, the reactor 1 is detachably provided with a first cover 2, which is provided with at least one air hole 21. The air hole 21 can be used to connect a pump device to control the air pressure inside the reactor 1 so that the raw material reaction is in an optimal reaction environment.

[0059] Please refer again Figure 4-5 In order to enable the feeder 5 to smoothly rotate with the conveyor belt, a mounting seat 8 for mounting the feeder 5 is provided on the conveyor belt, and the mounting seat 8 includes a base 81 fixedly mounted on the conveyor belt and two second sleeves 82 fixedly mounted on the outside of the base 81, and the base 81 is made of elastic material so that the base 81 can move close to the curved section of the conveyor belt. Two first sleeves 59 are fixedly mounted on the feeder 5, and the first sleeve 59 is rotatably connected to the second sleeve 82 on the same side through a connecting rod 83;

[0060] Furthermore, a first rotating rod is installed inside the first sleeve 59, and a second rotating rod is installed inside the second sleeve 82. One end of the connecting rod 83 is rotatably connected to the first rotating rod, and the other end of the connecting rod 83 is rotatably connected to the second rotating rod. When the feeder 5 moves upward following the feeding mechanism 4, the feeder 5 tilts downward under the action of gravity. When the base 81 is long enough, the feeder 5 abuts against the base 81 to avoid direct contact between the feeder 5 and the conveyor belt, thereby protecting the conveyor belt.

[0061] When the base 81 passes through the curved section of the conveyor belt, the second sleeve 82 of the cylindrical structure is in line contact with the surface of the conveyor belt, so that the two second sleeves 82 pass through the conveyor belt in sequence, and then the feeder 5 passes through the curved section of the conveyor belt.

[0062] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A feeding device for studying the performance of nuclear grade glass fiber air filter paper, characterized in that: It comprises a support, a reactor mounted on the support, and a feeding mechanism, wherein at least one feeder is arranged on the feeding mechanism, and the feeding mechanism controls the movement of the feeder so that the feeder is docked with the feeding port of the reactor, and the raw materials in the feeder are added into the reactor; The feeding port is externally connected to a feeding pipe, the feeder comprises a cylinder, a discharge port is provided on the cylinder, and the feeding pipe is connected and matched with the discharge port through a docking structure; The docking structure includes a joint fixedly mounted on the feeding pipe and a pipe head movably mounted on the discharge port, an iron ring is fixedly mounted on the outer side of the pipe head, an annular magnet matching the iron ring is fixedly mounted on the outer side of the joint, the annular magnet attracts the iron ring so that the pipe head is close to the joint and docks with the joint, the pipe head is connected to the discharge port through a connecting pipe, the connecting pipe is an elastic pipe structure, at least one connecting frame is further arranged on the outer side of the cylinder, one end of the connecting frame is movably connected to the cylinder, the other end of the connecting frame is movably connected to the pipe head, and the connecting frame is a telescopic structure; The bracket includes a workbench and a plurality of supporting legs fixedly mounted on the bottom of the workbench to support the workbench, the reactor and the feeding mechanism are both mounted on the workbench, the feeding mechanism is a conveyor belt mounted on the workbench, the lower side of the conveyor belt is mounted on the workbench through a first mounting frame, and the upper side of the conveyor belt is mounted on the workbench through a second mounting frame, a mounting seat for mounting a feeder is provided on the conveyor belt, the mounting seat includes a base fixedly mounted on the conveyor belt and two second sleeves fixedly mounted on the outside of the base, the base is made of elastic material so that the base can move close to the curved section of the conveyor belt, two first sleeves are fixedly mounted on the feeder, and the first sleeve is rotatably connected to the second sleeve on the same side by a connecting rod; a first rotating rod is mounted inside the first sleeve, and a second rotating rod is mounted inside the second sleeve, one end of the connecting rod is rotatably connected to the first rotating rod, and the other end of the connecting rod is rotatably connected to the second rotating rod.

2. The feeding device for studying the performance of nuclear-grade glass fiber air filter paper according to claim 1, characterized in that: The cylinder body is provided with a feed port, and a second cover body is detachably mounted on the feed port. The second cover body is threadedly connected to the feed port, and a knob is arranged on the second cover body.

3. The feeding device for studying the performance of nuclear-grade glass fiber air filter paper according to claim 2, characterized in that: The joint is provided with a groove of an annular structure, the annular magnet is fixedly installed in the groove, and a sealing ring is arranged at the inner edge of the groove.

4. The feeding device for studying the performance of nuclear-grade glass fiber air filter paper according to claim 3, characterized in that: The annular magnet is an electromagnet structure. An interface is provided on the lower side of the joint, which is electrically connected to the annular magnet. A power supply device is also fixedly mounted on the bracket, which is electrically connected to the interface via a cable to supply power to the annular magnet.

5. The feeding device for studying the performance of nuclear-grade glass fiber air filter paper according to claim 4, characterized in that: A driving shaft is arranged on the lower side of the conveyor belt, and a driven shaft is arranged on the upper side of the conveyor belt. The driving shaft and the driven shaft are connected by a belt, and the driving shaft is rotatably connected to the first mounting frame, the first mounting frame is fixedly connected to the workbench, the driven shaft is rotatably connected to the second mounting frame, and the second mounting frame is fixedly connected to the workbench.

6. The feeding device for studying the performance of nuclear-grade glass fiber air filter paper according to claim 5, characterized in that: A driving motor and a gear box are also installed on the workbench, and the output shaft of the driving motor is connected to the driving shaft through the gear box.

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