Chemical reaction auxiliary material feeder with high stability

Abstract

The utility model discloses a chemical reaction auxiliary material feeding device with high stability relates to chemical equipment technical field, it includes hopper, the bottom fixedly connected with the flow guide pipe of hopper, the top fixedly connected with two fixed frame of hopper, the similar side of two fixed frame all is fixedly connected with fixed pipe, the inside slide connection of fixed pipe has adjusting mechanism, the far side of two fixed frame all is fixedly connected with dismounting mechanism, adjusting mechanism includes piston rod, the outside slide connection of piston rod in fixed pipe's inside, the bottom fixedly connected with piston head of adjusting mechanism, in the utility model, through piston rod to the piston head adjustment, make chemical reaction auxiliary material enter the flow guide pipe, in the piston head enters the flow guide pipe, prevent chemical reaction auxiliary material from entering the flow guide pipe, after half circle board no.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a chemical reaction auxiliary feeder with high stability. Background Technology

[0002] Highly stable chemical reaction excipients are materials that are stable in conventional storage, transportation, and the initial stages of a reaction, and can assist the main reaction (such as specific catalysts and stabilizers). Feeders are devices used in chemical production to precisely deliver materials to reaction vessels and control the timing and speed of addition (commonly feeding funnels). These excipients require feeders because chemical production needs to ensure controllable and safe reactions: feeders can precisely control the quantity to meet the mixing ratio, avoiding manual errors that affect efficiency and products; they can adjust the speed to ensure uniform addition of excipients, preventing risks caused by excessively high local concentrations; some sealed models can also isolate impurities, preventing excipient failure or system contamination, ultimately ensuring a safe and efficient reaction and stable products.

[0003] The components of a highly stable chemical reaction auxiliary feeder include a funnel body, a guide tube, and a piston device containing a piston head, piston rod, and external handle. The bottom of the funnel body is connected to the guide tube, the piston head is placed inside the guide tube, and the piston rod passes through the side wall of the funnel and is connected to the external handle. The diameter of the guide tube can be adjusted by moving the piston head up and down. Therefore, in use, the funnel body is used to temporarily store auxiliary materials, facilitate the loading of auxiliary materials, and guide the material to the bottom. The guide tube, as the connection channel between the funnel and the reaction vessel, can accurately guide the material to prevent spillage. It can also be adapted to deliver auxiliary materials to a designated area. The piston device, through the linkage of the handle, adjusts the piston head to control the diameter of the guide tube, thereby controlling the feeding speed of the auxiliary materials and the on / off state of the feeding process, ensuring the accuracy of feeding and the safety of the reaction.

[0004] In existing technologies, the design of the feeding funnel in some high-stability chemical reaction auxiliary feeders focuses on the smooth flow of materials. This makes it easy for gas to backflow from the funnel to the outside of the system when the reaction is vigorous in the reactor. This not only threatens the safety of operators but also causes product loss. Therefore, a high-stability chemical reaction auxiliary feeder is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a chemical reaction auxiliary feeder with high stability, which aims to improve the problem in the prior art where gas backflow can easily cause danger to operators when the reactor reaction is intense.

[0006] This application provides a highly stable chemical reaction auxiliary feeder using the following technical solution: A highly stable chemical reaction auxiliary feeder includes a funnel, a guide tube fixedly connected to the bottom of the funnel, two fixed frames fixedly connected to the top of the funnel, a fixed tube fixedly connected to the adjacent side of the two fixed frames, an adjustment mechanism slidably connected inside the fixed tube, and a disassembly mechanism fixedly connected to the distant side of the two fixed frames. The adjusting mechanism includes a piston rod, the piston rod being slidably connected to the inside of the fixed tube, a piston head being fixedly connected to the bottom of the adjusting mechanism, a sealing ring being fixedly connected to the outside of the piston head, a connecting plate being fixedly connected to the bottom of the piston head, and a blocking component being fixedly connected to the bottom of the connecting plate. The above technical solution involves: a funnel for storing the chemical reaction additives; a guide tube that contacts the reactor to allow the chemical reaction additives to enter the reactor; a fixing tube for securing the piston device at the top of the funnel; and a piston rod that moves the piston head under the operator's force to adjust the diameter of the guide tube. During the reaction, the sealing ring helps to trap the chemical reaction additives inside the funnel. The connecting plate transmits the driving force of the piston head.

[0007] Preferably, the blocking component includes a force-applying plate one, the top of which is fixedly connected to the bottom of the connecting plate one, a semi-circular plate one is slidably connected inside the guide tube, a sliding block is fixedly connected to the front side of the semi-circular plate one, a second semi-circular plate two is fixedly connected inside the guide tube, one of the sealing plates is fixedly connected to the rear side of the semi-circular plate one, and another sealing plate is fixedly connected to the front side of the second semi-circular plate two. Through the above technical solution: the first force plate receives the pushing force of the piston head and thus moves in a straight line to stabilize it; the first semicircular plate receives the pushing force of the first force plate and thus moves downward, causing the sliding block to drive the first semicircular plate to move, so that the sealing plate on the first semicircular plate and the sealing plate on the second semicircular plate can fit together to prevent dust backflow.

[0008] Preferably, the disassembly mechanism includes two protective shells, with the adjacent sides of the two protective shells fixedly connected to the distant sides of the two fixing frames. A movable plate is slidably connected to the front side of the protective shell, and a movable rod is fixedly connected to the left side of the movable plate. A spring is sleeved on the outside of the movable rod. A fixing plate one is fixedly connected inside the protective shell, and a fixing plate two is fixedly connected to the left side of the fixing plate one. A force-applying plate two is slidably connected inside the protective shell. A limit plate is fixedly connected to the rear side of the movable rod. Two connecting plates two are fixedly connected to the bottom of the fixing frame, and a telescopic plate is fixedly connected to the front side of the connecting plate two. Through the above technical solution: the protective shell protects the internal mechanism and makes it stable; the movable plate receives the pushing force of the operator and moves, thereby moving the movable rod, which in turn drives the spring to move, preventing the limit switch from moving with the movable rod, causing the spring to compress, so that the operator applies force to the second force plate, which then applies force to the telescopic plate.

[0009] Preferably, the outer side of the force-applying plate is slidably connected to the inside of the guide tube, and the rear side of one of the sealing plates is in contact with the front side of the other sealing plate; Through the above technical solution: the first force plate receives the pushing force transmitted by the connecting plate, and thus slides inside the guide tube; the two sealing plates are fitted and sealed under the action of the first and second semicircular plates.

[0010] Preferably, the outer side of the movable rod is slidably connected to the inside of the second force-applying plate, and the left side of the spring is fixedly connected to the right side of the second fixed plate; Through the above technical solution: the moving rod receives the drag force of the moving plate, thereby allowing the moving rod to enter the interior of the second force-applying plate, thereby allowing the second force-applying plate to apply force to the telescopic plate, and the spring receives the pushing force of the moving rod, thereby storing elastic force.

[0011] Preferably, the limiting plate is externally slidably connected to the inside of the first fixed plate, and the limiting plate is internally slidably connected to one of the second connecting plates; Through the above technical solution: the limiting plate receives the pushing force of the moving rod, and thus moves linearly under the action of the fixed plate one. The limiting plate slides inside the connecting plate two, thereby limiting the connection plate two.

[0012] Preferably, the front side of the telescopic plate contacts the rear side of the second force-applying plate, and the front side of the protective shell is provided with a slot; Through the above technical solution: the telescopic plate receives the force applied by the second force-applying plate, thereby extending and retracting; the slot allows the movable plate to move within the slot after receiving the pushing force from the operator.

[0013] Preferably, the outer part of the sealing ring is slidably connected to the inside of the guide tube, and the outer part of the connecting plate is slidably connected to the inside of the guide tube; Through the above technical solution: the sealing ring receives the movement of the piston head, thereby blocking and sealing the inside of the guide tube, preventing the chemical reaction excipients from entering the guide tube; the connecting plate receives the pushing force of the piston head, thereby moving inside the guide tube.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. In this utility model, the piston head is adjusted by the piston rod, so that the chemical reaction excipients enter the guide tube. When the piston head enters the guide tube, the sealing ring prevents the chemical reaction excipients from entering the guide tube. After applying force to the first semicircular plate, one of the sealing plates of the first semicircular plate comes into contact with the other sealing plate of the second semicircular plate, thereby preventing dust from flowing back out. This achieves precise control of the reaction rate by adjusting the position of the piston head.

[0015] 2. In this utility model, the movement of the moving plate causes the moving rod to move the limiting plate. As the moving rod moves continuously, it causes the spring to compress, and the moving rod applies force to the second force plate, which in turn applies force to the telescopic plate, thereby causing the two connecting plates to detach from the protective shell, thus realizing the disassembly of the piston device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a chemical reaction auxiliary feeder with high stability proposed in this utility model; Figure 2 This is a schematic diagram of the structure of a protective shell for a chemical reaction auxiliary feeder with high stability proposed in this utility model; Figure 3 This is a schematic diagram of the sealing ring structure of a chemical reaction auxiliary feeder with high stability proposed in this utility model; Figure 4 This is a schematic diagram of the moving plate of a chemical reaction auxiliary feeder with high stability proposed in this utility model; Figure 5 This is a schematic diagram of the moving rod of a chemical reaction auxiliary feeder with high stability proposed in this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Funnel; 2. Guide tube; 3. Fixing frame; 4. Fixing tube; 5. Adjusting mechanism; 51. Piston rod; 52. Piston head; 53. Sealing ring; 54. Connecting plate one; 55. Blocking assembly; 551. Force plate one; 552. Semicircular plate one; 553. Sealing plate; 554. Semicircular plate two; 555. Sliding block; 6. Disassembly mechanism; 61. Protective shell; 62. Moving plate; 63. Moving rod; 64. Spring; 65. Fixing plate one; 66. Fixing plate two; 67. Force plate two; 68. Limiting plate; 69. Connecting plate two; 610. Telescopic plate. Detailed Implementation

[0018] The following combination Figures 1-5 This application will be described in further detail below.

[0019] Example: A highly stable chemical reaction auxiliary feeder, referring to... Figures 1 to 3 The system includes a funnel 1, which serves as a carrier and initial introduction component for the raw materials required by the chemical reaction auxiliary feeder. It can temporarily store the materials to be reacted. The funnel 1 facilitates the entry of the chemical reaction auxiliary into the reactor. A guide pipe 2 is fixedly connected to the bottom of the funnel 1. The guide pipe 2 is in direct contact with the reactor, so that the chemical reaction auxiliary coming out of the funnel 1 enters the reactor from here. Two fixed frames 3 are fixedly connected to the top of the funnel 1. The fixed frames 3 serve as structural support and connection fixation, so as to facilitate the clamping of the piston device. A fixed pipe 4 is fixedly connected to the adjacent side of the two fixed frames 3. The fixed pipe 4 allows the piston device to be adjusted in height. An adjustment mechanism 5 is slidably connected inside the fixed pipe 4. A disassembly mechanism 6 is fixedly connected to the distant side of the two fixed frames 3. Specifically, funnel 1 allows the chemical reaction additives to enter the chemical reaction additive feeder from here, and guide pipe 2 is in direct contact with the reactor, thereby stably transferring the chemical reaction additives into the reactor as a connecting component. Under the action of fixing frame 3 and fixing pipe 4, the piston device on funnel 1 stably adjusts the inlet diameter of guide pipe 2. Under the action of disassembly component, the piston device can be disassembled, thereby facilitating the replacement of different piston devices. Adjustment mechanism 5 is used to adjust the size of the piston device at the inlet diameter of guide pipe 2.

[0020] The adjusting mechanism 5 includes a piston rod 51, which is externally slidably connected to the inside of the fixed tube 4. The piston rod 51 is the power transmission and motion execution component of the adjusting mechanism 5 and is also part of the piston device. A piston head 52 is fixedly connected to the bottom of the adjusting mechanism 5. The piston head 52 receives the pushing force of the piston rod 51 and thus adjusts the diameter of the guide tube 2. A sealing ring 53 is fixedly connected to the outside of the piston head 52. The sealing ring 53 seals the guide tube 2 when the piston head 52 enters it, preventing the chemical reaction excipients from entering the guide tube 2. A connecting plate 54 is fixedly connected to the bottom of the piston head 52. The connecting plate 54 receives the force applied by the piston head 52 and thus moves downward. A blocking component 55 is fixedly connected to the bottom of the connecting plate 54. Specifically, when the operator applies force to the piston rod 51, the piston head 52 at the bottom is continuously adjusted at the inlet of the guide tube 2 to allow the chemical reaction excipients to enter. When the piston enters the guide tube 2, the sealing ring 53 is fixed to the surface of the guide tube 2, thereby sealing the surface of the guide tube 2 and preventing the chemical reaction excipients from entering the guide tube 2.

[0021] The blocking assembly 55 includes a force-applying plate 551, the top of which is fixedly connected to the bottom of a connecting plate 54. As the force-receiving and connecting component of the blocking assembly 55, it receives the force applied from the top and thus applies downward force. A semi-circular plate 552 is slidably connected inside the guide tube 2. The semi-circular plate 552 is one of the core components in the blocking assembly 55 that participates in adjusting the flow cross-section of the guide tube 2, thus receiving the pushing force from the force-applying plate 551. A sliding block 555 is fixedly connected to the front side of the semi-circular plate 552. The sliding block 555 slides after the semi-circular plate 552 receives the applied force and possesses resilience. To facilitate the return of the first semicircular plate 552 to its original position, the second semicircular plate 554 is fixedly connected inside the guide tube 2. The second semicircular plate 554 is fixed inside the guide tube 2, thus contacting the first semicircular plate 552. One sealing plate 553 is fixedly connected to the rear side of the first semicircular plate 552, and another sealing plate 553 is fixedly connected to the front side of the second semicircular plate 554. The two sealing plates 553 are fixed under the action of the first semicircular plate 552 and the second semicircular plate 554 respectively. Under the action of the first semicircular plate 552, the two sealing plates 553 are brought into contact to seal, thus preventing the backflow of dust generated by the chemical reaction excipients. Specifically, when the piston head 52 enters the guide tube 2, it applies force to the force-applying plate 551, causing the force-applying plate 551 to apply force to the bottom semi-circular plate 552. After the semi-circular plate 552 receives the pushing force, the sliding block 555 on the surface of the semi-circular plate 552 moves with the semi-circular plate 552, thus sliding inside the guide tube 2. The sliding block 555 itself has elasticity, which facilitates the return of the semi-circular plate 552 to its original position. During the downward movement of the semi-circular plate 552, the sealing plate 553 on the semi-circular plate 552 comes into contact with the sealing plate 553 on the second semi-circular plate 554, thereby sealing the two sealing plates 553 and preventing the dust entering the reactor from flowing back.

[0022] Reference Figure 2 , Figure 4 and Figure 5The disassembly / removal mechanism 6 includes two protective shells 61. The adjacent sides of the two protective shells 61 are fixedly connected to the distant sides of two fixed brackets 3. The protective shells 61 protect the disassembly components from damage. A movable plate 62 is slidably connected to the front of the protective shell 61. The movable plate 62 receives the pushing force from the operator, thus moving linearly. A movable rod 63 is fixedly connected to the left side of the movable plate 62. The movable rod 63 moves linearly after receiving the pushing force from the movable plate 62. A spring 64 is sleeved on the outside of the movable rod 63. The spring 64 stores elasticity as the movable rod 63 moves, allowing it to return to its original position. A fixed plate 65 is fixedly connected inside the protective shell 61, providing a fixed support end for the spring 64. Fixed plate 66 is fixedly connected to the left side of fixed plate 65. Fixed plate 66 serves as an auxiliary limiting and supporting component inside the disassembly mechanism 6. Force plate 67 is slidably connected inside the protective shell 61. Force plate 67 receives the drag force of moving rod 63 and moves within the protective shell 61. Limiting plate 68 is fixedly connected to the rear side of moving rod 63. Limiting plate 68 moves with moving rod 63 and disengages from connecting plate 69. Two connecting plates 69 are fixedly connected to the bottom of the fixing frame 3. Telescopic plate 610 is fixedly connected to the front side of connecting plate 69. Connecting plate 69 moves with fixing frame 3 and is fixed. Telescopic plate 610 limits connecting plate 69, fixing it within the protective shell 61. Specifically, the protective shell 61 protects the internal disassembly components, reducing damage during operation. The movable plate 62, upon receiving the pushing force from the operator, moves the movable rod 63, causing the limiting plate 68 to disengage from the connecting plate 2 69. As the movable rod 63 moves continuously, the spring 64 stores elasticity at the fixed plate 1 65, allowing the subsequent movable rod 63 to return to its original position. The continuous movement of the movable rod 63 causes the force-applying plate 2 67 to move against the telescopic plate 610, causing the telescopic plate 610 to extend and retract, locking into the connecting plate 2 69. This causes the two limiting plates 68 to disengage from the connecting plate 2 69, allowing the fixed frame 3 to disassemble and exit the funnel 1.

[0023] Reference Figures 1 to 3The external sliding connection of the force-applying plate 551 is to the inside of the guide tube 2. The force-applying plate 551 receives the force applied by the piston head 52 and moves downward. The rear side of one sealing plate 553 contacts the front side of the other sealing plate 553. The two sealing plates 553 are in contact and sealed by the action of the semicircular plate 552 and the semicircular plate 554 to prevent the backflow of chemical reaction auxiliary material dust. The external sliding connection of the moving rod 63 is to the inside of the force-applying plate 67. The moving rod 63 receives the pushing force of the operator and applies force to the moving rod 63, so that the moving rod 63 is inserted into the force-applying plate, so that the force-applying plate 67 moves. The left side of the spring 64 is fixedly connected to the right side of the fixed plate 66. The spring 64 stores the elastic force at the fixed plate 66, so that the moving rod 63 returns to its original position after operation. The limiting plate 68 is externally slidably connected to the inside of the fixed plate 65. The limiting plate 68 slides inside the fixed plate 65 under the force of the moving rod 63. The limiting plate 68 is internally slidably connected to one of the connecting plates 69. The limiting plate 68 is limited by one of the limiting plates 69. Under the action of the moving rod 63, it disengages from the equipment. The front side of the telescopic plate 610 contacts the rear side of the force-applying plate 67. The telescopic plate 610 stores elastic force after receiving the force applied by the force-applying plate 67. The front side of the protective shell 61 has a slot for the moving plate 62 to move. The sealing ring 53 is externally slidably connected to the inside of the guide tube 2. The sealing ring 53 slides inside the guide tube 2, thereby fixing the guide tube 2. The connecting plate 54 is externally slidably connected to the inside of the guide tube 2. The connecting plate 54 receives the force applied by the piston head 52 and moves accordingly.

[0024] Specifically, under the action of the piston head 52, the force-applying plate 551 moves the semi-circular plate 552 downward, causing the two sealing plates 553 to come into contact, thereby preventing dust backflow inside the reactor. The slot on the front side of the protective shell 61 allows the moving plate 62 to move within the slot after receiving the pushing force, causing the moving rod 63 to drive the limiting plate 68 to move, causing the limiting plate 68 to move inside the fixed plate 65, thereby causing the limiting plate 68 to disengage from the connecting plate 69. After receiving the force from the moving rod 63, the force-applying plate 67 causes the telescopic plate 610 to extend and retract, thereby causing the two connecting plates 69 to disengage from the protective shell 61.

[0025] The implementation principle of this application embodiment is as follows: First, the operator introduces the chemical reaction excipients into the reactor under the action of the guide pipe 2. The operator can adjust the piston rod 51 at the opening of the guide pipe 2 so that the piston head 52 is aligned with the diameter of the guide pipe 2, thereby adjusting the amount of chemical reaction excipients entering. After the reaction occurs, the operator inserts the piston head 52 into the guide pipe 2 so that the sealing ring 53 is aligned with the opening of the guide pipe 2, thereby preventing the chemical reaction excipients from entering the guide pipe 2. The piston head 52 then applies force to the force plate 551, causing the semi-circular plate 552 to be subjected to force and move downward, so that the two sealing plates 553 come into contact, thereby preventing the reaction dust from flowing back. This achieves precise control of the reaction rate by adjusting the position of the piston head 52.

[0026] Then, the operator can pull the movable plate 62, which in turn moves the movable rod 63. During the movement, the movable rod 63 causes the limiting plate 68 to move linearly under the action of the fixed plate 65, thus disengaging it from the connecting plate 69. As the movable rod 63 moves, it compresses the external spring 64, storing elastic force. The movable rod 63 then applies force to the force plate 67, causing the force plate 67 to apply force to the telescopic plate 610, thus causing the telescopic plate 610 to extend and retract, thereby allowing the fixed frame 3 to disengage from the protective shell 61, thus achieving the disassembly of the piston device.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A highly stable chemical reaction auxiliary feeder, comprising a funnel (1), characterized in that: The bottom of the funnel (1) is fixedly connected to a guide pipe (2), and the top of the funnel (1) is fixedly connected to two fixing frames (3). The two fixing frames (3) are fixedly connected to a fixing pipe (4) on the adjacent side. The fixing pipe (4) is slidably connected to an adjustment mechanism (5), and the two fixing frames (3) are fixedly connected to a disassembly mechanism (6) on the distant side. The adjusting mechanism (5) includes a piston rod (51), the piston rod (51) is slidably connected to the outside of the fixed tube (4), a piston head (52) is fixedly connected to the bottom of the adjusting mechanism (5), a sealing ring (53) is fixedly connected to the outside of the piston head (52), a connecting plate (54) is fixedly connected to the bottom of the piston head (52), and a blocking component (55) is fixedly connected to the bottom of the connecting plate (54).

2. The chemical reaction auxiliary feeder with high stability according to claim 1, characterized in that: The blocking assembly (55) includes a first force-applying plate (551), the top of which is fixedly connected to the bottom of the first connecting plate (54). A first semicircular plate (552) is slidably connected inside the guide tube (2). A sliding block (555) is fixedly connected to the front side of the first semicircular plate (552). A second semicircular plate (554) is fixedly connected inside the guide tube (2). One of the sealing plates (553) is fixedly connected to the rear side of the first semicircular plate (552). Another sealing plate (553) is fixedly connected to the front side of the second semicircular plate (554).

3. The chemical reaction auxiliary feeder with high stability according to claim 1, characterized in that: The disassembly mechanism (6) includes two protective shells (61). The adjacent sides of the two protective shells (61) are fixedly connected to the distant sides of the two fixed frames (3). A movable plate (62) is slidably connected to the front side of the protective shell (61). A movable rod (63) is fixedly connected to the left side of the movable plate (62). A spring (64) is sleeved on the outside of the movable rod (63). A fixed plate one (65) is fixedly connected inside the protective shell (61). A fixed plate two (66) is fixedly connected to the left side of the fixed plate one (65). A force-applying plate two (67) is slidably connected inside the protective shell (61). A limit plate (68) is fixedly connected to the rear side of the movable rod (63). Two connecting plates two (69) are fixedly connected to the bottom of the fixed frame (3). A telescopic plate (610) is fixedly connected to the front side of the connecting plate two (69).

4. The chemical reaction auxiliary feeder with high stability according to claim 2, characterized in that: The external force-applying plate (551) is slidably connected to the inside of the guide tube (2), and the rear side of one of the sealing plates (553) is in contact with the front side of the other sealing plate (553).

5. A highly stable chemical reaction auxiliary feeder according to claim 3, characterized in that: The external sliding connection of the moving rod (63) is inside the force-applying plate (67), and the left side of the spring (64) is fixedly connected to the right side of the fixed plate (66).

6. A highly stable chemical reaction auxiliary feeder according to claim 3, characterized in that: The limiting plate (68) is externally slidably connected to the inside of the fixing plate one (65), and the limiting plate (68) is internally slidably connected to one of the connecting plates two (69).

7. A highly stable chemical reaction auxiliary feeder according to claim 3, characterized in that: The front side of the telescopic plate (610) is in contact with the rear side of the force-applying plate (67), and the front side of the protective shell (61) is provided with a slot.

8. A highly stable chemical reaction auxiliary feeder according to claim 2, characterized in that: The sealing ring (53) is externally slidably connected to the inside of the guide tube (2), and the connecting plate (54) is externally slidably connected to the inside of the guide tube (2).

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