Diesel oil hydrofining device

Abstract

The utility model relates to the technical field of refining devices, in particular to a diesel hydrorefining device which comprises a tank body, an oil inlet connector is arranged at the upper end of one side of the tank body in a penetrating mode, the joint position of the oil inlet connector and the tank body is fixed through welding, and an oil outlet connector is arranged at the bottom of the tank body in a penetrating mode. The joint position of the oil outlet connector and the tank body is fixed through welding, and a first valve is arranged on the surface of the oil outlet connector. When diesel oil needs to be conveyed, the diesel oil can be conveyed into the tank body through the oil inlet connector to wait for reaction, then a power source of the first motor is firstly switched on to enable the first rotating shaft to rotate and drive the stirring shaft to conduct linkage, so that the blades can rotate, the diesel oil can flow in the tank body, and then the diesel oil is conveyed into the tank body through the oil inlet connector. External hydrogen supply equipment is connected with the hydrogen conveying pipe, and hydrogen can pass through the inside of the hydrogen conveying pipe and is dispersed and discharged through the aeration holes, so that the contact uniformity with diesel oil is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a refining device technical field especially relates to a diesel hydrogen refining device. BACKGROUND

[0002] The diesel hydrogen refining device is a kind of chemical equipment for improving diesel quality, the sulfur, nitrogen, oxygen and other impurities in diesel are converted into harmless substances by hydrogenation reaction, to improve the combustion performance and environmental protection performance of diesel. Hydrogenation refining is one of the most commonly used diesel desulfurization methods at present, and is widely used in petroleum refining and chemical industry.

[0003] The application of diesel hydrogen refining device can effectively reduce the sulfur content in diesel, reduce sulfides in tail gas emission, improve air quality and protect the environment. At the same time, hydrogenation refining can also improve the cetane number of diesel, improve the combustion performance of diesel and improve the efficiency and service life of engine. With the continuous improvement of environmental protection requirements, diesel hydrogen refining device has been widely used in petroleum refining and chemical industry, such as the prior art Chinese patent publication "CN217103736U" provides a diesel hydrogen refining device, including base, the lower end of the base is fixedly connected with four supporting legs, the upper end of the base is provided with recess, the recess is provided with reactor body, the upper and lower ends of the reactor body are rotatably connected with inlet pipe and outlet pipe communicated with its interior respectively, the lower end of the reactor body is provided with first support mechanism, the reactor body is provided with second support mechanism, the reactor body is provided with stirring mechanism, the inner wall of the recess is provided with connecting rod, the two ends of the connecting rod are rotatably connected with second fixed plate respectively, one end of the second fixed plate is fixedly connected with the inner wall of recess, the connecting rod is provided with linkage mechanism, the connecting rod is fixedly sleeved with driven wheel. The utility model discloses a driving mechanism, which realizes the rotation of reactor and internal stirring mechanism at the same time, so as to improve the stirring and mixing effect of material and improve the mixing efficiency.

[0004] At present, in the process of diesel hydrogenation, the harmful substances in diesel are mainly treated, and most of the hydrogenation methods are to pass hydrogen from the bottom to contact with diesel, but this method can easily lead to uneven contact between diesel and hydrogen, and diesel hydrogenation treatment also needs to cooperate with catalyst for assistance, and most of the catalysts are fixed in the container, so if the treatment process of diesel is not flowing, the quality of contact reaction will be greatly reduced. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the above-mentioned shortcomings in the prior art and provides a diesel hydrogen refining device.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme:

[0007] Design a diesel hydrorefining device, including a tank body, an oil inlet port is provided through the upper end of one side of the tank body, and the oil inlet port is fixed to the tank body by welding. An oil outlet port is provided through the bottom of the tank body, and the oil outlet port is fixed to the tank body by welding. A valve is provided on the surface of the oil outlet port, and the valve core of the valve is embedded in the inside of the oil outlet port. The upper end of the tank body is covered with a cover plate, and the lower end of the cover plate is fixed to the end of the tank body by screws along the edge.

[0008] A sealed bearing is installed through the bottom of the tank. The connection between the sealed bearing and the tank is fixed by welding. The sealed bearings are symmetrically distributed along the bottom of the tank. A stirring shaft is installed through the inside of the sealed bearing. The surface of the stirring shaft is interference-fitted with the inner ring wall of the sealed bearing. A stirring blade is installed inside the stirring shaft in the tank. One end of the stirring blade is fixed to the surface of the stirring shaft by screws. A motor is installed at the bottom of the tank. The surface of the motor is fixedly assembled to the bottom of the tank by a bracket. A drive shaft is installed inside the motor. The end of the drive shaft is fixedly connected to the stirring shaft by a coupling.

[0009] A hydrogen delivery pipe is installed through the center of the cover plate. The connection between the hydrogen delivery pipe and the cover plate is fixed by welding. The lower end of the hydrogen delivery pipe is a closed end. Several aeration holes are distributed through the surface of the hydrogen delivery pipe. A second valve is installed at the upper end of the hydrogen delivery pipe. The valve core of the second valve is embedded inside the hydrogen delivery pipe.

[0010] In detail, a thermometer is installed through one side of the upper end of the cover plate, and the connection between the thermometer and the cover plate is fixed with sealant. A pressure relief valve is installed through the other side of the upper end of the cover plate, and the connection between the pressure relief valve and the cover plate is fixed by welding.

[0011] In detail, the outer surface of the tank is wrapped with an annular sleeve, the inner wall of the annular sleeve is fixed to the surface of the tank by screws, and an annular cavity is provided inside the annular sleeve.

[0012] In detail, the two ends of the annular sleeve are respectively provided with a conveying interface and a circulation interface along the top. The conveying interface and the circulation interface are fixed to the connection position of the annular sleeve by welding. The conveying interface and the circulation interface are respectively connected to the annular cavity.

[0013] In detail, the tank body has a cylinder inside, and the outer wall of the cylinder is slidably fitted with the inside of the tank body. A mesh box is installed inside the cylinder. The mesh box has a hollow structure. The edge of the mesh box is fixedly assembled with the inside of the cylinder by screws. The inside of the mesh box is filled with a catalyst layer. A tube sleeve is installed through the center of the mesh box. The connection between the tube sleeve and the mesh box is fixed by welding. The mesh box is made of aluminum alloy wire mesh material. The inside of the tube sleeve is slidably fitted with a hydrogen delivery pipe.

[0014] In detail, the upper end of the cylinder is provided with a connecting frame, which is a right-angle structure. The lower end of the connecting frame is welded and fixed to the end of the cylinder. The upper end of the connecting frame is provided with a square rod, and the lower end of the square rod is fixed to the surface of the connecting frame by screws. An inner sleeve is provided through the surface of the cover plate. The connection position between the inner sleeve and the cover plate is fixed by welding. The surface of the square rod is slidably sleeved with the inside of the inner sleeve.

[0015] In detail, the upper end of the square rod is provided with an extrusion plate, and the surface of the extrusion plate is fixed to the connection position of the square rod by screws. A spring is wound around the surface of the square rod, and the two ends of the spring are fixedly assembled to the surface of the extrusion plate and the end face of the inner sleeve, respectively.

[0016] In detail, a bearing seat is provided above the cover plate. The outer wall of the bearing seat is fixedly assembled to the surface of the cover plate by a bracket. A shaft is provided inside the bearing seat. A second motor is provided at the other end of the shaft. The outer wall of the second motor is fixedly assembled to the surface of the cover plate by a bracket. A second rotating shaft for driving is provided inside the second motor. The end of the second rotating shaft is fixedly connected to the end of the shaft by a coupling. A cam is fixedly sleeved on the surface of the shaft. The cam is located directly below the extrusion plate.

[0017] The design scheme proposed in this utility model has the following beneficial effects in application:

[0018] 1. When diesel fuel needs to be transported, diesel fuel can be fed into the tank through the oil inlet to wait for reaction. Then, the power of motor one is turned on so that the rotating shaft one can rotate and drive the stirring shaft to rotate, so that the blades can rotate and the diesel fuel can flow in the tank. Then, the external hydrogen supply equipment is connected to the hydrogen delivery pipe. The hydrogen can pass through the hydrogen delivery pipe and be dispersed and discharged through the aeration holes, thereby improving the uniformity of contact with the diesel fuel. In order to ensure that the temperature of the diesel fuel and hydrogen reaction is appropriate, the temperature inside the tank can be measured by a thermometer, and the pressure relief valve can be used to assist in depressurizing the tank when the pressure is too high.

[0019] 2. As described in 1, when it is necessary to raise or lower the temperature inside the tank, a heat conduction effect can be formed by contacting the annular sleeve with the tank. By conveying hot or cold water in the annular cavity, the tank can be heated or cooled. Hot or cold water can be conveyed through the conveying interface and circulated out through the circulation interface, thereby ensuring the stability of the hot or cold water circulation for temperature regulation.

[0020] 3. As described in section 2, when diesel reacts with hydrogen, it is aided by a catalyst layer in the mesh box. To further improve the contact effect between the catalyst layer and the diesel, the power supply of motor 2 is turned on, which drives the rotating shaft 2, thereby realizing the rotation of the shaft. The shaft drives the cam to rotate, and the high and low positions of the cam continuously contact the extrusion plate, which can realize the lifting or releasing of the extrusion plate. This allows the square rod to slide within the inner sleeve, and then allows the connecting frame to move up and down with the cylinder, realizing the up and down movement of the catalyst layer in the diesel, which can improve the contact effect between the diesel and the catalyst layer. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0022] Figure 2 This is a bottom view of the overall structure of this utility model;

[0023] Figure 3 This is a side view of the overall structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the distribution of the stirring blades in this utility model.

[0026] In the diagram: 1. Tank body; 11. Oil inlet; 12. Oil outlet; 13. Valve 1; 14. Cover plate; 15. Sealed bearing; 16. Stirring shaft; 17. Motor 1; 18. Stirring blade; 19. Valve 2; 110. Aeration hole; 111. Hydrogen delivery pipe; 2. Thermometer; 21. Pressure relief valve; 3. Annular sleeve; 31. Annular cavity; 32. Delivery interface; 33. Circulation interface; 4. Cylinder; 40. Pipe sleeve; 41. Mesh box; 42. Catalyst layer; 43. Connecting frame; 44. Internal sleeve; 45. Square rod; 46. Extrusion plate; 47. Spring; 4001. Shaft seat; 4002. Shaft; 4003. Cam; 4004. Motor 2. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Reference Figures 1-5A diesel hydrorefining device includes a tank body 1. An oil inlet 11 is provided through the upper end of one side of the tank body 1. The oil inlet 11 is fixed to the tank body 1 by welding. An oil outlet 12 is provided through the bottom of the tank body 1. The oil outlet 12 is fixed to the tank body 1 by welding. A valve 13 is provided on the surface of the oil outlet 12. The valve core of the valve 13 is embedded in the inside of the oil outlet 12. The upper end of the tank body 1 is covered with a cover plate 14. The lower end of the cover plate 14 is fixed to the end of the tank body 1 by screws along the edge.

[0029] A sealed bearing 15 is installed through the bottom of the tank body 1. The connection between the sealed bearing 15 and the tank body 1 is fixed by welding. The sealed bearing 15 is symmetrically distributed along the bottom of the tank body 1. A stirring shaft 16 is installed through the inside of the sealed bearing 15. The surface of the stirring shaft 16 is press-fitted with the inner ring wall of the sealed bearing 15. A stirring blade 18 is installed inside the stirring shaft 16 in the tank body 1. One end of the stirring blade 18 is fixed to the surface of the stirring shaft 16 by screws. A motor 17 is installed at the bottom of the tank body 1. The surface of the motor 17 is fixedly assembled to the bottom of the tank body 1 by a bracket. A drive shaft 1 is installed inside the motor 17. The end of the drive shaft 1 is fixedly connected to the stirring shaft 16 by a coupling.

[0030] A hydrogen delivery pipe 111 is installed through the center of the cover plate 14. The connection between the hydrogen delivery pipe 111 and the cover plate 14 is fixed by welding. The lower end of the hydrogen delivery pipe 111 is a closed end. Several aeration holes 110 are distributed through the surface of the hydrogen delivery pipe 111. A valve 2 19 is installed at the upper end of the hydrogen delivery pipe 111. The valve core of the valve 2 19 is embedded inside the hydrogen delivery pipe 111.

[0031] It should be further noted that a thermometer 2 is installed through one side of the upper end of the cover plate 14. The connection between the thermometer 2 and the cover plate 14 is fixed with sealant. A pressure relief valve 21 is installed through the other side of the upper end of the cover plate 14. The connection between the pressure relief valve 21 and the cover plate 14 is fixed by welding. The thermometer 2 can monitor the temperature inside the tank 1. The pressure relief valve 21 can be connected to an external exhaust pipe and can automatically relieve pressure and exhaust air when the pressure inside the tank 1 is too high.

[0032] It should be further explained that the tank body 1 is wrapped with an annular sleeve 3. The inner wall of the annular sleeve 3 is fixed to the surface of the tank body 1 by screws. The annular sleeve 3 has an annular cavity 31 inside. The annular sleeve 3 is made of stainless steel and has good heat conduction effect. Hot and cold water can be introduced into the annular cavity 31 for temperature regulation of the tank body 1.

[0033] It should be further noted that the two ends of the annular sleeve 3 are respectively provided with a conveying interface 32 and a circulation interface 33. The conveying interface 32 and the circulation interface 33 are fixed to the connection position of the annular sleeve 3 by welding. The conveying interface 32 and the circulation interface 33 are respectively connected to the annular cavity 31. The conveying interface 32 and the circulation interface 33 can ensure the circulation of hot and cold water in the annular cavity 31.

[0034] It should be further explained that a cylinder 4 is provided inside the tank body 1. The outer wall of the cylinder 4 is slidably fitted with the inside of the tank body 1. A mesh box 41 is provided inside the cylinder 4. The mesh box 41 is a hollow structure. The edge of the mesh box 41 is fixedly assembled with the inside of the cylinder 4 by screws. The inside of the mesh box 41 is filled with a catalyst layer 42. A tube sleeve 40 is provided through the center of the mesh box 41. The connection between the tube sleeve 40 and the mesh box 41 is fixed by welding. The mesh box 41 is made of aluminum alloy wire mesh material. The inner side of the tube sleeve 40 is slidably fitted with the hydrogen delivery pipe 111. The catalyst particles are the basic units of the catalyst layer 42 and are usually made of materials such as metal oxides and metal sulfides, such as desulfurization catalysts, denitrification catalysts, and deoxygenation catalysts.

[0035] It should be further explained that a connecting frame 43 is provided at the upper end of the cylinder 4. The connecting frame 43 is a right-angle structure. The lower end of the connecting frame 43 is welded and fixed to the end of the cylinder 4. A square rod 45 is provided at the upper end of the connecting frame 43. The lower end of the square rod 45 is fixed to the surface of the connecting frame 43 by screws. An inner sleeve 44 is provided through the surface of the cover plate 14. The connection position between the inner sleeve 44 and the cover plate 14 is fixed by welding. The surface of the square rod 45 and the inside of the inner sleeve 44 are slidably sleeved. The connecting frame 43 can play a connecting and moving role, and can slide and sleeve the cylinder 4 relative to the tank 1.

[0036] It should be further explained that an extrusion plate 46 is provided at the upper end of the square rod 45. The surface of the extrusion plate 46 is fixed to the connection position of the square rod 45 by screws. A spring 47 is wound around the surface of the square rod 45. The two ends of the spring 47 are fixedly assembled to the surface of the extrusion plate 46 and the end face of the inner sleeve 44, respectively. The square rod 45 can ensure the straight up and down movement of the extrusion plate 46 by shape limiting.

[0037] It should be further explained that a bearing seat 4001 is provided above the cover plate 14. The outer wall of the bearing seat 4001 is fixedly assembled with the surface of the cover plate 14 through a bracket. A shaft 4002 is provided inside the bearing seat 4001. A motor 4004 is provided at the other end of the shaft 4002. The outer wall of the motor 4004 is fixedly assembled with the surface of the cover plate 14 through a bracket. A rotating shaft 2 for driving is provided inside the motor 4004. The end of the rotating shaft 2 is fixedly connected to the end of the shaft 4002 through a coupling. A cam 4003 is fixedly sleeved on the surface of the shaft 4002. The cam 4003 is located directly below the extrusion plate 46. In order to enable the catalyst layer 42 to move up and down, the power supply of the motor 4004 is turned on, so that the shaft 4002 can be rotated through the rotating shaft 2, thereby driving the cam 4003, thus applying force to the extrusion plate 46, thereby achieving the up and down movement of the catalyst layer 42.

[0038] Working method: When diesel fuel needs to be transported, diesel fuel can be fed into tank 1 through oil inlet 11 to wait for reaction. Then, the power supply of motor 17 is turned on so that the rotating shaft 1 can rotate and drive the stirring shaft 16 to move in conjunction, so that the stirring blade 18 can rotate and the diesel fuel can flow in tank 1. Then, the hydrogen supply equipment is connected to the hydrogen delivery pipe 111 through the external hydrogen supply equipment. The hydrogen can be dispersed and discharged through the aeration hole 110 in the hydrogen delivery pipe 111, thereby improving the uniformity of contact with diesel fuel. In order to ensure the appropriate temperature of diesel fuel and hydrogen reaction, the temperature inside tank 1 can be measured by thermometer 2, and the pressure relief valve 21 can be used to assist in depressurization when the internal pressure of tank 1 is too high.

[0039] When it is necessary to raise or lower the temperature inside the tank 1, the annular sleeve 3 can contact the tank 1 to form a heat conduction effect. By conveying hot or cold water in the annular cavity 31, the tank 1 can be heated or cooled. Hot or cold water can be conveyed through the conveying interface 32, and hot or cold water can be circulated out through the circulation interface 33, thereby ensuring the stability of the hot or cold water circulation for temperature regulation.

[0040] When diesel reacts with hydrogen, it is aided by the catalyst layer 42 in the mesh box 41. To further improve the contact effect between the catalyst layer 42 and the diesel, the power supply of the second motor 4004 is turned on. The second motor 4004 drives the second rotating shaft, thereby realizing the rotation of the shaft 4002. The shaft 4002 drives the cam 4003 to rotate. The high and low positions of the cam 4003 continuously contact the extrusion plate 46, which can realize the lifting or releasing of the extrusion plate 46. This allows the square rod 45 to slide within the inner sleeve 44, and then allows the connecting frame 43 to move up and down with the cylinder 4, realizing the up and down shaking of the catalyst layer 42 in the diesel, which can improve the contact effect between the diesel and the catalyst layer 42.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A diesel hydrofining unit comprising a vessel (1), characterised in that: The side upper end of the tank body (1) is provided with an oil inlet interface (11), and the connection position of the oil inlet interface (11) and the tank body (1) is fixed by welding. The bottom of the tank body (1) is provided with an oil outlet interface (12), and the connection position of the oil outlet interface (12) and the tank body (1) is fixed by welding. The surface of the oil outlet interface (12) is provided with a valve one (13), and the valve core of the valve one (13) is embedded in the inside of the oil outlet interface (12). The upper end of the tank body (1) is covered with a cover plate (14), and the lower end of the cover plate (14) is fixed with the end of the tank body (1) through screws along the edge position. The bottom of the tank body (1) is provided with a sealing bearing (15), and the connection position of the sealing bearing (15) and the tank body (1) is fixed by welding. The sealing bearing (15) is symmetrically arranged along the bottom of the tank body (1). The inside of the sealing bearing (15) is provided with a stirring shaft (16), and the surface of the stirring shaft (16) is arranged in interference fit with the inner ring wall of the sealing bearing (15). The inside of the stirring shaft (16) located in the tank body (1) is provided with stirring blades (18). One end of the stirring blades (18) is fixed with the surface of the stirring shaft (16) through screws. The lower part of the tank body (1) is provided with a motor one (17), and the surface of the motor one (17) is fixed and assembled with the bottom of the tank body (1) through a support. The inside of the motor one (17) is provided with a driving shaft one, and the end of the driving shaft one is fixedly connected with the stirring shaft (16) through a shaft coupling. The center of the cover plate (14) is provided with a hydrogen delivery pipe (111), and the connection position of the hydrogen delivery pipe (111) and the cover plate (14) is fixed by welding. The lower end of the hydrogen delivery pipe (111) is a closed end. The surface of the hydrogen delivery pipe (111) is provided with a plurality of aeration holes (110). The upper end of the hydrogen delivery pipe (111) is provided with a valve two (19), and the valve core of the valve two (19) is embedded in the inside of the hydrogen delivery pipe (111).

2. A diesel hydrofmishing unit according to claim 1, characterized in that: The upper end of the cover plate (14) is provided with a thermometer (2), and the connection position of the thermometer (2) and the cover plate (14) is fixed by sealing glue. The upper end of the cover plate (14) is provided with a pressure relief valve (21), and the connection position of the pressure relief valve (21) and the cover plate (14) is fixed by welding.

3. A diesel hydrofmishing unit according to claim 1 wherein: The outside of the tank body (1) is wrapped with an annular sleeve (3), and the inner ring wall of the annular sleeve (3) and the surface of the tank body (1) are fixed by screws. The inside of the annular sleeve (3) is provided with an annular cavity (31).

4. A diesel hydrofmishing unit according to claim 3, characterized in that: The two ends of the annular sleeve (3) are provided with a delivery interface (32) and a circulation interface (33) respectively. The delivery interface (32) and the circulation interface (33) are both fixed with the connection position of the annular sleeve (3) by welding. The delivery interface (32) and the circulation interface (33) are respectively communicated with the annular cavity (31).

5. A diesel hydrofmishing unit according to claim 1 wherein: The inside of the tank body (1) is provided with a cylinder (4), the outer wall of the cylinder (4) is in sliding sleeve connection with the inside of the tank body (1), the inside of the cylinder (4) is provided with a mesh box (41), the mesh box (41) is a hollow structure, the edge position of the mesh box (41) is fixedly assembled with the inside of the cylinder (4) through screws, the inside of the mesh box (41) is filled with a catalyst layer (42), a pipe sleeve (40) is penetratingly arranged at the center position of the mesh box (41), the pipe sleeve (40) is fixedly connected with the mesh box (41) through welding, the mesh box (41) is made of aluminum alloy wire mesh material, and the inside of the pipe sleeve (40) is in sliding sleeve connection with a hydrogen conveying pipe (111).

6. A diesel hydrofmishing unit according to claim 5, characterized in that: The upper end of the cylinder (4) is provided with an adapter frame (43), the adapter frame (43) is a right-angle structure, the lower end of the adapter frame (43) is fixedly connected with the end of the cylinder (4) through welding, the upper end of the adapter frame (43) is provided with a square rod (45), the lower end of the square rod (45) is fixedly connected with the surface of the adapter frame (43) through screws, the surface of the cover plate (14) is penetratingly provided with an embedded sleeve (44), the embedded sleeve (44) is fixedly connected with the cover plate (14) through welding, and the surface of the square rod (45) is in sliding sleeve connection with the inside of the embedded sleeve (44).

7. A diesel hydrofmishing unit according to claim 6, characterized in that: The upper end of the square rod (45) is provided with an extrusion plate (46), the surface of the extrusion plate (46) is fixedly connected with the surface of the square rod (45) through screws, the surface of the square rod (45) is windingly provided with a spring (47), and the two ends of the spring (47) are fixedly assembled with the surface of the extrusion plate (46) and the end face of the embedded sleeve (44) respectively.

8. A diesel hydrofmishing unit according to claim 7, characterized in that: The upper end of the square rod (45) is provided with an extrusion plate (46), the surface of the extrusion plate (46) is fixedly connected with the surface of the square rod (45) through screws, the surface of the square rod (45) is windingly provided with a spring (47), and the two ends of the spring (47) are fixedly assembled with the surface of the extrusion plate (46) and the end face of the embedded sleeve (44) respectively. The upper end of the square rod (45) is provided with an extrusion plate (46), the surface of the extrusion plate (46) is fixedly connected with the surface of the square rod (45) through screws, the surface of the square rod (45) is windingly provided with a spring (47), and the two ends of the spring (47) are fixedly assembled with the surface of the extrusion plate (46) and the end face of the embedded sleeve (44) respectively.

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