A device for detecting a key index of cyclohexyl ester organic compound preparation

Abstract

This invention discloses a key indicator detection device for the preparation of cyclohexyl ester organic compounds, relating to the field of compound preparation technology. The device includes a reaction vessel with a built-in regulating component and a buzzer alarm on the top, electrically connected to the regulating component. A pressure relief component is located on one side of the reaction vessel. By adjusting the number of counterweights, the resistance to movement of the moving platform can be changed, thereby controlling the gas pressure inside the reaction vessel. This allows for precise adjustment according to reaction requirements. When the gas pressure is too high, the alarm will sound promptly, alerting the operator to make adjustments and preventing damage to the device and materials. The device achieves pressure relief through the movement of the limiting window and the moving seat, allowing for timely release of excess gas inside the reaction vessel and preventing damage or reaction failure due to excessive pressure. The design of the device ensures the reliability and stability of the pressure relief process, meeting the requirements for precise pressure control in compound preparation and ensuring operational safety and product quality.

Description

Technical Field

[0001] This invention relates to the field of compound preparation technology, specifically to a device for detecting key indicators in the preparation of cyclohexyl ester organic compounds. Background Technology

[0002] Cyclohexyl ester is an organic compound with the chemical formula C6H10O2. It is produced by the reaction of cyclohexane and acid anhydride and belongs to the ester class of compounds. Cyclohexyl ester has a pleasant fruity flavor and is therefore often used as a fragrance and solvent. It can be used to formulate various flavorings, food additives, coatings, adhesives, and soluble oils. In addition, cyclohexyl ester can also be used to prepare plastic materials, synthetic fibers, and pharmaceutical intermediates. In industrial production, cyclohexyl ester is usually synthesized through transesterification or alcoholization. Transesterification refers to the reaction of an ester with an alcohol to produce a new ester, while alcoholization refers to the reaction of an ester with an alcohol to produce an alcohol and an ester.

[0003] During the reaction, the target alcohol and acid anhydride need to be prepared and their quality and purity ensured. A catalyst for the transesterification reaction needs to be prepared. Commonly used catalysts include basic catalysts or acid catalysts. The raw material alcohol and acid anhydride are added to the reaction vessel according to the required molar ratio. The reaction temperature and reaction pressure are controlled. Heating under appropriate temperature conditions promotes the reaction. The reaction pressure and reaction time need to be controlled, otherwise the quality of the reaction product will be poor or even the reaction will fail. To address these issues, we propose a key indicator detection device for the preparation of cyclohexyl ester organic compounds. Summary of the Invention

[0004] The purpose of this invention is to provide a device for detecting key indicators in the preparation of cyclohexyl ester organic compounds, so as to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] This invention provides a key indicator detection device for the preparation of cyclohexyl ester organic compounds, comprising a reaction vessel, an adjustment component built into the reaction vessel, a buzzer alarm installed on the top of the reaction vessel and electrically connected to the adjustment component, a pressure relief component installed on one side of the reaction vessel, a heating coil installed at the bottom of the inner cavity of the reaction vessel, and the adjustment component including a moving platform placed inside the reaction vessel. The moving platform is slidably connected to the inner wall of the reaction vessel around its perimeter, and a first mounting groove is formed around the perimeter of the moving platform. A rubber ring is fitted into the first mounting groove, and the outer ring wall of the rubber ring is slidably connected to the inner wall of the reaction vessel. Multiple limiting blocks are fixedly connected to the inner wall of the reaction vessel, and the multiple limiting blocks are evenly distributed around the axis of the reaction vessel. The limiting blocks are located at the bottom of the moving platform and at the top of the feed inlet.

[0007] Preferably, the reactor has a connecting port at the top, a discharge port at the bottom, and a feed port on the side of the reactor away from the pressure relief component. The discharge port, connecting port, and feed port are all equipped with sealing caps.

[0008] Preferably, the top of the motion platform is fixedly connected to multiple fixed rollers, which are evenly distributed around the axis of the reactor. Multiple counterweights are sleeved on the surface of the fixed rollers, and the counterweights are slidably connected to the surface of the fixed rollers. A through hole is opened on one side of each counterweight.

[0009] Preferably, a fixed cylinder is fixedly connected to the top of the motion platform, the fixed cylinder is aligned with the axis of the motion platform, a guide cylinder is sleeved on the surface of the fixed cylinder, the inner wall of the guide cylinder is slidably connected to the fixed cylinder, a connecting plate is fixedly connected to the top of the guide cylinder, and the end of the connecting plate away from the guide cylinder is fixedly connected to the inner wall of the reaction vessel.

[0010] Preferably, a lower electrode plate is provided on one side of the top of the fixed cylinder, and an upper electrode plate is provided on the bottom of the guide cylinder near the lower electrode plate. The lower electrode plate and the upper electrode plate are arranged in the circuit of the buzzer alarm.

[0011] Preferably, the pressure relief assembly includes a mounting cylinder, one end of which extends through the reactor and into the reactor. The mounting cylinder is fixedly connected to the reactor and is located on the side of the reactor away from the feed inlet. Two limiting windows are opened on one end surface of the mounting cylinder outside the reactor.

[0012] Preferably, the two limiting windows are symmetrically distributed along the axis of the mounting cylinder. A moving seat is sleeved inside the mounting cylinder. The moving seat is slidably connected to the inner wall of the mounting cylinder. A second mounting groove is provided around the moving seat. A rubber ring is sleeved inside the second mounting groove. The outer ring wall of the rubber ring is slidably connected to the inner wall of the mounting cylinder.

[0013] Preferably, a fixing rod is fixedly connected to the side of the motion seat away from the reactor, and limiting cylinders matching the limiting window are fixedly connected to both sides of the fixing rod. The limiting cylinders are placed inside the limiting window and are slidably connected to the inner wall of the limiting window. The end of the fixing rod away from the motion seat extends to the outside of the mounting cylinder.

[0014] Preferably, the top of the fixed rod away from the moving seat has multiple oblique toothed grooves, the top of the mounting cylinder is fixedly connected to the mounting seat, the top of the mounting seat has a groove, the two sides of the groove of the mounting seat have fixed grooves, the bottom of the inner cavity of the fixed groove is rotatably connected to a rotating rod, the two ends of the rotating rod are sleeved with torsion springs, and the torsion springs are disposed in the fixed grooves.

[0015] Preferably, one end of the torsion spring is fixedly connected to the wall of the fixed groove, and the other end of the torsion spring is fixedly connected to the rotating rod. A connecting seat is sleeved on the surface of the rotating rod, and the connecting seat is fixedly connected to the rotating rod. A pull ring is fixedly connected to the top of the connecting seat, and teeth are fixedly connected to the bottom of the end of the connecting seat away from the rotating rod. The teeth match the oblique tooth groove.

[0016] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0017] The moving platform is slidably connected to the reactor wall, and the outer ring of the rubber ring is slidably connected to the inner wall of the reactor, ensuring the airtightness of the device and effectively preventing gas leakage. By adjusting the number of counterweights, the resistance to the movement of the moving platform can be changed, thereby controlling the gas pressure inside the reactor. It can be finely adjusted according to reaction requirements to adapt to different reaction conditions. The device is equipped with a buzzer alarm. When the gas pressure is too high, the alarm will sound in time to remind the staff to make adjustments, preventing damage to the device and materials and avoiding reaction failure. The device achieves pressure relief operation through the movement of the limit window and the moving seat, which can release excess gas in the reactor in time, avoiding damage or reaction failure caused by excessive gas pressure, and ensuring the safety of the device and personnel. The design of the device ensures the reliability and stability of the pressure relief process, can meet the requirements for fine control of gas pressure in compound preparation, and ensures operational safety and product quality. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the reactor of the present invention;

[0021] Figure 3 This is a schematic diagram of the assembly structure of the regulating component and the reaction vessel of the present invention;

[0022] Figure 4 This is the invention Figure 3 Enlarged structural diagram at point A in the middle;

[0023] Figure 5 This is a schematic diagram of the adjustment component structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the pressure relief component structure of the present invention;

[0025] Figure 7 This is the invention Figure 6Enlarged structural diagram at point B;

[0026] In the picture:

[0027] 1. Reactor; 101. Connecting port; 102. Discharge port; 103. Sealing cover; 104. Feed inlet; 105. Heating coil; 2. Adjustment assembly; 201. Moving table; 202. First mounting groove; 203. Rubber ring; 204. Limiting block; 205. Fixed roller; 206. Counterweight; 207. Connecting hole; 208. Fixed cylinder; 209. Guide cylinder; 210. Connecting plate; 3. Buzzer alarm 4. Alarm device; 301. Upper electrode plate; 302. Lower electrode plate; 4. Pressure relief assembly; 401. Mounting cylinder; 402. Limiting window; 403. Moving seat; 404. Second mounting groove; 406. Fixing rod; 407. Limiting cylinder; 408. Inclined toothed groove; 409. Mounting seat; 410. Fixing groove; 411. Rotating rod; 412. Torsion spring; 413. Connecting seat; 414. Pull ring; 415. Teeth. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0029] Please see Figures 1-7 This invention provides a key indicator detection device for the preparation of cyclohexyl ester organic compounds, including a reaction vessel 1, an adjustment component 2 inside the reaction vessel 1, a buzzer alarm 3 on the top of the reaction vessel 1, the buzzer alarm 3 being electrically connected to the adjustment component 2, a pressure relief component 4 on one side of the reaction vessel 1, a heating coil 105 at the bottom of the inner cavity of the reaction vessel 1, a connecting port 101 on the top of the reaction vessel 1, a discharge port 102 at the bottom of the reaction vessel 1, and a feed port 104 on the side of the reaction vessel 1 away from the pressure relief component 4. A sealing cover 103 is provided at the discharge port 102, the connecting port 101, and the feed port 104. Materials are added into the reaction vessel 1 through the feed port 104 for heating and reaction.

[0030] To control the gas pressure inside the reactor 1 during the reaction process, a moving platform 201 is provided in the regulating component 2. The moving platform 201 is placed inside the reactor 1 and is slidably connected to the inner wall of the reactor 1. A first mounting groove 202 is formed around the moving platform 201, and a rubber ring 203 is fitted inside the first mounting groove 202. The outer ring wall of the rubber ring 203 is slidably connected to the inner wall of the reactor 1. Multiple limiting blocks 204 are fixedly connected to the inner wall of the reactor 1. The multiple limiting blocks 204 are evenly distributed around the axis of the reactor 1 and are located at the bottom and top of the inlet 104 of the moving platform 201. Multiple fixed rollers 205 are fixedly connected to the top of the moving platform 201 and are evenly distributed around the axis of the reactor 1. Multiple counterweights 206 are fitted onto the surface of the fixed rollers 205 and are slidably connected to the surface of the fixed rollers 205. A through-hole is formed on one side of the counterweight 206. A fixed cylinder 208 is fixedly connected to the top of the moving platform 201 through the connecting hole 207. The fixed cylinder 208 coincides with the axis of the moving platform 201. A guide cylinder 209 is sleeved on the surface of the fixed cylinder 208. The inner wall of the guide cylinder 209 is slidably connected to the fixed cylinder 208. A connecting plate 210 is fixedly connected to the top of the guide cylinder 209. The end of the connecting plate 210 away from the guide cylinder 209 is fixedly connected to the inner wall of the reactor 1. When the material reacts in the reactor 1, the lower limit of the bottom of the moving platform 201 is close to the limiting block 204. As the reaction proceeds, the gas pressure inside the reactor rises, and the moving platform 201 moves upward under force. In the initial stage, the connecting port 101 can be opened, and the number of counterweights 206 on the top of the moving platform 201 can be adjusted. When there are more counterweights 206, the resistance to the movement of the moving platform 201 will be greater, thereby controlling the gas pressure inside the reactor 1. It can be adjusted and adapted according to the reaction requirements, which is beneficial to the preparation of compounds.

[0031] To prevent excessive gas pressure from causing reaction failure and damage to materials, a lower electrode plate 302 is installed on one side of the top of the fixed cylinder 208, and an upper electrode plate 301 is installed on the bottom side of the guide cylinder 209 near the lower electrode plate 302. The lower electrode plate 302 and the upper electrode plate 301 are integrated into the circuit of the buzzer alarm 3. During the reaction, if the gas pressure is too high, it can push the pre-set moving platform 201 to move upward continuously, eventually causing the lower electrode plate 302 to contact the upper electrode plate 301, thus activating the buzzer alarm 3. The buzzer alarm will alert the staff. Excessive gas pressure can effectively protect the device and allow for timely adjustment of the gas pressure, which is beneficial for the formation of compounds.

[0032] To promptly release pressure when the gas pressure inside the reactor 1 becomes too high, thus protecting the device and the reactants, a mounting cylinder 401 is provided in the pressure relief assembly 4. One end of the mounting cylinder 401 extends through the reactor 1 into the reactor and is fixedly connected to the reactor 1. The mounting cylinder 401 is located on the side of the reactor 1 away from the feed inlet 104. Two limiting windows 402 are formed on the outer surface of the mounting cylinder 401, symmetrically distributed along the axis of the mounting cylinder 401. A moving seat 403 is fitted inside the mounting cylinder 401 and is slidably connected to the inner wall of the mounting cylinder 401. A second mounting groove 404 is formed around the moving seat 403. A rubber ring 203 is fitted inside the 404, and the outer ring wall of the rubber ring 203 is slidably connected to the inner wall of the mounting cylinder 401. A fixing rod 406 is fixedly connected to the side of the moving seat 403 away from the reactor 1. Limiting cylinders 407 matching the limiting window 402 are fixedly connected to both sides of the fixing rod 406. The limiting cylinders 407 are placed inside the limiting window 402 and are slidably connected to the inner wall of the limiting window 402. The end of the fixing rod 406 away from the moving seat 403 extends to the outside of the mounting cylinder 401. Multiple oblique grooves 408 are opened at the top of the end of the fixing rod 406 away from the moving seat 403. A mounting base 409 is fixedly connected to the top of the mounting cylinder 401. A groove is opened at the top of the mounting base 409. The seat 409 has fixing grooves 410 on both sides of the groove. A rotating rod 411 is rotatably connected to the bottom of the inner cavity of the fixing groove 410. Torsion springs 412 are sleeved at both ends of the rotating rod 411. The torsion springs 412 are set in the fixing groove 410. One end of the torsion spring 412 is fixedly connected to the groove wall of the fixing groove 410, and the other end of the torsion spring 412 is fixedly connected to the rotating rod 411. A connecting seat 413 is sleeved on the surface of the rotating rod 411. The connecting seat 413 is fixedly connected to the rotating rod 411. A pull ring 414 is fixedly connected to the top of the connecting seat 413. A tooth 415 is fixedly connected to the bottom of the end of the connecting seat 413 away from the rotating rod 411. The tooth 415 matches the inclined tooth groove 408. In the initial state, the tooth... The tooth 415 is fixed to the inclined tooth groove 408 at the top of the fixed rod 406 under the elastic force of the coil spring at one end. The moving seat 403 seals the pressure relief port of the reactor 1. When the buzzer alarm 3 sounds, pressure relief is required. At this time, the connecting seat 413 can be lifted so that the tooth 415 disengages from the inclined tooth groove 408. The moving seat 403 can move inside the mounting cylinder 401. When the moving seat 403 moves to the limiting windows 402 on both sides, the limiting windows 402 are connected to the reactor 1 through the mounting cylinder 401. Excess gas is discharged from the limiting windows 402 to reduce the gas pressure inside the reactor and adjust it in time so as to adapt to the gas pressure required for compound generation, which is beneficial to the generation of the compound.

[0033] Working principle

[0034] The motion platform 201 is located inside the reactor 1 and is slidably connected to the inner wall of the reactor 1. A first mounting groove 202 is formed around the motion platform 201, and a rubber ring 203 is fitted inside the groove. The outer ring wall of the rubber ring 203 is slidably connected to the inner wall of the reactor 1 to ensure sealing. Multiple limiting blocks 204 are fixedly connected to the bottom of the motion platform 201 and are evenly distributed around the axis of the reactor 1 to limit the upward range of the motion platform 201. Fixed rollers 205 are fixed to the top of the motion platform 201 and are evenly distributed around the axis of the reactor 1. Counterweights 206 are fitted onto their surfaces; adjusting the number of counterweights 206 can change the position of the motion platform 201. The counterweight 206 has a through-hole 207 on one side to resist the movement of the counterweight 206. A fixed cylinder 208 is fixedly connected to the top of the moving platform 201 to prevent the moving platform 201 from rotating. By adjusting the number of counterweights 206, the resistance to the upward movement of the moving platform 201 can be changed, thereby controlling the gas pressure in the reactor 1. The gas pressure can be freely adjusted according to the reaction requirements to adapt to different reaction conditions. Precise gas pressure control is very important for the preparation of certain compounds. This device can achieve fine control of the gas pressure during the compound preparation process, which is beneficial to improving the efficiency of the preparation process and the quality of the product.

[0035] A lower electrode plate 302 is provided on one side of the top of the fixed cylinder 208, and an upper electrode plate 301 is provided on the bottom side of the guide cylinder 209 near the lower electrode plate 302. The lower electrode plate 302 and the upper electrode plate 301 are connected to the circuit of the buzzer alarm 3. When the air pressure is high, the moving table 201 will move upward until the lower electrode plate 302 contacts the upper electrode plate 301. After the lower electrode plate 302 contacts the upper electrode plate 301, the circuit of the buzzer alarm 3 will be turned on, and the buzzer alarm 3 will sound to alert the staff. After receiving the alarm, the staff can take timely measures to adjust the air pressure to protect the device and materials and prevent reaction failure. The device can detect excessive air pressure in time through the buzzer alarm 3 to avoid reaction failure and material damage. The alarm prompts the staff to take appropriate measures to protect the safety of the device and materials. The triggering of the alarm can prompt the staff to adjust the air pressure, which is conducive to the reasonable control of reaction conditions and ensures the formation of compounds.

[0036] The device achieves pressure relief by moving the limiting window 402 and the moving seat 403. In the initial state, the moving seat 403 seals the pressure relief port of the reactor 1, restricting gas discharge. When the buzzer alarm 3 sounds, the connecting seat 413 can be lifted, causing the teeth 415 to disengage from the inclined tooth groove 408, thereby releasing the restriction on the moving seat 403. When the moving seat 403 moves axially, the limiting window 402 is connected to the reactor 1 through the mounting cylinder 401, and excess gas is discharged from the limiting window 402, achieving pressure relief. By moving the moving seat 403 and the limiting window 402, the device can promptly relieve the pressure inside the reactor 1, avoiding damage or reaction failure caused by excessive pressure. Through the pressure relief operation, it is beneficial to adjust the pressure inside the reactor 1 in a timely manner to adapt to the appropriate pressure conditions required for compound formation. The design of the device ensures the reliability and stability of the pressure relief process, and helps to ensure the safety of operating equipment and personnel.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for detecting key indicators in the preparation of cyclohexyl ester organic compounds, characterized in that, The reactor includes a reaction vessel (1), which has a built-in regulating component (2). A buzzer alarm (3) is installed on the top of the reaction vessel (1) and is electrically connected to the regulating component (2). A pressure relief component (4) is installed on one side of the reaction vessel (1). A heating coil (105) is installed at the bottom of the inner cavity of the reaction vessel (1). The regulating component (2) includes a motion table (201), which is placed inside the reaction vessel (1). The motion table (201) is surrounded by... The motion platform (201) is slidably connected to the inner wall of the reactor (1). A first mounting groove (202) is provided around the motion platform (201). A rubber ring (203) is fitted inside the first mounting groove (202). The outer ring wall of the rubber ring (203) is slidably connected to the inner wall of the reactor (1). A plurality of limiting blocks (204) are fixedly connected to the inner wall of the reactor (1). The plurality of limiting blocks (204) are evenly distributed around the axis of the reactor (1). The limiting blocks (204) are set at the bottom of the motion platform (201). The top of the motion platform (201) is fixedly connected to multiple fixed rollers (205), which are evenly distributed around the axis of the reactor (1). Multiple counterweights (206) are sleeved on the surface of the fixed rollers (205), and the counterweights (206) are slidably connected to the surface of the fixed rollers (205). A through hole (207) is opened on one side of the counterweights (206). A fixed cylinder (208) is fixedly connected to the top of the motion table (201). The fixed cylinder (208) is aligned with the axis of the motion table (201). A guide cylinder (209) is sleeved on the surface of the fixed cylinder (208). The inner wall of the guide cylinder (209) is slidably connected to the fixed cylinder (208). A connecting plate (210) is fixedly connected to the top of the guide cylinder (209). The end of the connecting plate (210) away from the guide cylinder (209) is fixedly connected to the inner wall of the reactor (1). The fixed cylinder (208) has a lower electrode plate (302) on one side of its top, and the guide cylinder (209) has an upper electrode plate (301) on the side of its bottom near the lower electrode plate (302). The lower electrode plate (302) and the upper electrode plate (301) are located in the circuit of the buzzer alarm (3). The pressure relief assembly (4) includes a mounting cylinder (401), one end of which extends through the reactor (1) into the reactor. The mounting cylinder (401) is fixedly connected to the reactor (1). The mounting cylinder (401) is located on the side of the reactor (1) away from the feed inlet (104). Two limiting windows (402) are opened on one end surface of the mounting cylinder (401) outside the reactor (1).

2. The device for detecting key indicators in the preparation of cyclohexyl ester organic compounds according to claim 1, characterized in that, The reactor (1) has a connecting port (101) at the top and a discharge port (102) at the bottom. The reactor (1) has a feed port (104) on the side away from the pressure relief component (4). The discharge port (102), the connecting port (101) and the feed port (104) are all equipped with a sealing cover (103). The limiting block (204) is located on the top of the feed port (104).

3. The device for detecting key indicators in the preparation of cyclohexyl ester organic compounds according to claim 2, characterized in that, The two limiting windows (402) are symmetrically distributed along the axis of the mounting cylinder (401). A moving seat (403) is sleeved inside the mounting cylinder (401). The moving seat (403) is slidably connected to the inner wall of the mounting cylinder (401). A second mounting groove (404) is provided around the moving seat (403). A rubber ring (203) is sleeved inside the second mounting groove (404). The outer ring wall of the rubber ring (203) is slidably connected to the inner wall of the mounting cylinder (401).

4. The device for detecting key indicators in the preparation of cyclohexyl ester organic compounds according to claim 3, characterized in that, A fixing rod (406) is fixedly connected to the side of the motion seat (403) away from the reactor (1). A limiting cylinder (407) matching the limiting window (402) is fixedly connected to both sides of the fixing rod (406). The limiting cylinder (407) is placed inside the limiting window (402) and is slidably connected to the inner wall of the limiting window (402). The end of the fixing rod (406) away from the motion seat (403) extends to the outside of the mounting cylinder (401).

5. The device for detecting key indicators in the preparation of cyclohexyl ester organic compounds according to claim 4, characterized in that, The top of the fixed rod (406) away from the moving seat (403) has multiple oblique toothed grooves (408). The top of the mounting cylinder (401) is fixedly connected to the mounting seat (409). The top of the mounting seat (409) has a groove. The inner walls of the groove of the mounting seat (409) have fixed grooves (410) on both sides. The bottom of the inner cavity of the fixed groove (410) is rotatably connected to a rotating rod (411). Both ends of the rotating rod (411) are sleeved with torsion springs (412). The torsion springs (412) are set in the fixed groove (410).

6. The device for detecting key indicators in the preparation of cyclohexyl ester organic compounds according to claim 5, characterized in that, One end of the torsion spring (412) is fixedly connected to the wall of the fixed groove (410), and the other end of the torsion spring (412) is fixedly connected to the rotating rod (411). A connecting seat (413) is sleeved on the surface of the rotating rod (411). The connecting seat (413) is fixedly connected to the rotating rod (411). A pull ring (414) is fixedly connected to the top of the connecting seat (413). A tooth (415) is fixedly connected to the bottom of the end of the connecting seat (413) away from the rotating rod (411). The tooth (415) matches the oblique tooth groove (408).

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