Environment-friendly biomass hot blast stove

Abstract

This utility model provides an environmentally friendly biomass hot air furnace, relating to the field of biomass hot air furnace technology. It includes a heating chamber with a support frame fixedly connected to its outer surface. In this utility model, a combustion sieve frame is driven by a motor in a combustion-perfecting mechanism to reciprocate, effectively breaking up fuel accumulation and significantly increasing the contact area between fuel and air, thus significantly improving fuel combustion efficiency. Compared to traditional hot air furnaces, it reduces emissions of pollutants such as carbon monoxide and soot, greatly improving environmental performance. Simultaneously, a preheating mechanism utilizes the waste heat generated by combustion in the heating chamber to preheat the biomass fuel. The heat is transferred to the preheating chamber via a heat recovery pipe. During transport, the fuel absorbs heat through heat-conducting holes, increasing its temperature. Upon entering the heating chamber, it is easier to ignite and burns more completely, reducing the initial energy consumption required for fuel combustion and achieving the recycling of heat energy, effectively improving the overall energy utilization efficiency of the hot air furnace.

Description

Technical Field

[0001] This utility model relates to the field of biomass hot air furnace technology, and in particular to an environmentally friendly biomass hot air furnace. Background Technology

[0002] With increasing global focus on environmental protection and sustainable development, biomass energy, as a clean and renewable energy source, is being used more and more widely in the field of industrial heating. Biomass hot blast stoves, with their advantage of using biomass as fuel to reduce dependence on fossil fuels and lower carbon emissions, have become important equipment for many companies to achieve green production. However, existing biomass hot blast stoves still face many problems that urgently need to be solved in practical applications.

[0003] Taking a high-efficiency biomass environmentally friendly hot air furnace disclosed in Chinese Patent Publication No. CN220707725U as an example, the patent includes a frame and a feeding chamber, a combustion chamber, and a heat exchange chamber sequentially installed on the frame. The combustion chamber contains a furnace body, and the feeding chamber contains a hopper for storing biomass pellets. A screw feeder for conveying biomass pellets is located at the lower end of the hopper. The end of the screw feeder is connected to the furnace body via a guide pipe. A first fan in the feeding chamber is connected to an external air duct for branching into air pipes. The first air pipe is used to move the material in the guide pipe and guide it into the furnace body. A second air pipe is used to disperse the material introduced into the furnace body. Although this patent can… This invention allows biomass pellets to burn completely within the furnace. By using a ring-shaped air duct, the heat radiated from the high-temperature furnace body is blown upwards and discharged through the exhaust port, preventing heat loss due to insufficient heat dissipation around the furnace body. However, this patent relies solely on a blower to disperse the material and promote combustion. It cannot effectively and continuously turn the material when biomass pellets are piled up or unevenly distributed within the furnace. As combustion progresses, incomplete combustion and decreased combustion efficiency are likely to occur in certain areas. Once the material accumulates, the airflow generated by the blower cannot penetrate deeply enough to ensure that the fuel and air are always in full contact, resulting in poor combustion stability. Utility Model Content

[0004] The purpose of this invention is to solve the problems of incomplete fuel combustion, low thermal energy utilization, poor structural stability, inconvenient ash cleaning, and poor sealing performance in existing biomass hot air furnaces, and to propose an environmentally friendly biomass hot air furnace.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an environmentally friendly biomass hot air furnace, including a heating chamber, a support frame fixedly connected to the outer surface of the heating chamber, and a combustion-complete mechanism provided on the top of the support frame; the combustion-complete mechanism includes a motor, an auger fixedly connected to the output end of the motor, a first rotating shaft seat fixedly connected to one end of the auger, a first pulley fixedly connected to the outer wall of both the output end of the motor and the first rotating shaft seat, a transmission belt sleeved on the outer wall of each first pulley, a second pulley rotatably connected to the inner wall of each transmission belt, a second rotating shaft seat rotatably connected to the interior of each second pulley, a transmission rod screwedly fixedly connected to the outer surface of each second pulley, a transmission arm rotatably connected to the outer wall of each transmission rod, a reciprocating rod rotatably connected to the exterior of each transmission arm via a shaft, a force-bearing rod fixedly inserted inside each reciprocating rod, a combustion screen frame fixedly connected to the opposite ends of the two force-bearing rods, a limit sliding block fixedly connected to both sides of the combustion screen frame, and a filter screen fixedly attached to the opposite side of the limit sliding block.

[0006] Preferably, the output end of the motor is provided with a conveying preheating mechanism; the conveying preheating mechanism includes a preheating chamber, the inner wall of the preheating chamber and the outer wall of the auger cooperate with each other, the outer wall of the preheating chamber is provided with a set of heat conduction holes, the outer wall of the preheating chamber is fixedly connected to a feeding flange connecting pipe, and the outer wall of the preheating chamber is provided with a feeding port.

[0007] Preferably, a set of heat recovery pipes is fixedly connected to the top of the heating chamber, and the set of heat recovery pipes are interconnected with the preheating chamber through the feeding support.

[0008] Preferably, the feeding bracket and the feeding port are interconnected.

[0009] Preferably, a support plate is fixedly connected to the top of the heating chamber, and the top of the support plate is fixedly connected to the outer wall of the preheating chamber.

[0010] Preferably, a set of limiting sliding grooves is provided on the opposite side of the heating chamber, and each of the force-bearing rods and limiting sliding blocks is slidably disposed inside the limiting sliding grooves, and the outer surface of each of the second rotating shaft seats is fixedly connected to the outer surface of the heating chamber.

[0011] Preferably, a set of hot air pipes is inserted inside the heating chamber, and both ends of the hot air pipes are fixedly connected to air collection chambers. Each air collection chamber has an external flange pipe fixedly connected to its outer surface, and the two external flange pipes are respectively connected to an air intake device and an exhaust device.

[0012] The bottom of the heating chamber is fixedly connected to an ash storage bin, and an electric gate is fixedly installed on the outer surface of the ash storage bin. Both sides of the heating chamber are fixedly connected to sealing bins. Each reciprocating rod is correspondingly slidably inserted into the interior of the sealing bin, and each limiting sliding groove is correspondingly sealed by the sealing bin.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, the combustion screen frame is driven by a motor in the combustion mechanism to reciprocate, which effectively breaks the fuel accumulation state, greatly increases the contact area between fuel and air, and significantly improves the fuel combustion efficiency. Compared with traditional hot air furnaces, it can reduce the emission of pollutants such as carbon monoxide and soot, and greatly improve environmental protection performance. At the same time, the conveying and preheating mechanism uses the waste heat generated by the combustion in the heating chamber to preheat the biomass fuel. The heat is transferred to the preheating chamber through the heat recovery pipe. During the conveying process, the fuel absorbs heat through the heat conduction holes, increases its own temperature, and is easier to ignite and burn more completely after entering the heating chamber. This reduces the initial energy consumption required for fuel combustion, realizes the recycling of heat energy, and effectively improves the overall energy utilization efficiency of the hot air furnace.

[0015] 2. In terms of structural design, the support frame, support plate, and other components provide stable support for the hot air furnace, ensuring stable operation of the equipment. The precise cooperation between the limiting sliding groove, the force-bearing rod, and the limiting sliding block ensures stable movement of the combustion screen frame. The sealing chamber seals the reciprocating rod and the limiting sliding groove to prevent the leakage of hot air and dust, improving the safety and reliability of equipment operation and reducing maintenance costs. Functionally, the hot air conveying system composed of the hot air pipe, the air collecting chamber, and the external flange pipe can flexibly realize the directional conveying or recycling of hot air to meet diverse heating needs such as drying and heating. The ash bin, combined with the electric gate, facilitates the centralized cleaning of ash, keeps the inside of the equipment clean, reduces manual labor intensity, and has a high degree of functional integration, practicality, and application flexibility. Attached Figure Description

[0016] Figure 1 A perspective view of an environmentally friendly biomass hot air furnace is provided for this utility model;

[0017] Figure 2 This utility model provides a disassembled perspective view of an environmentally friendly biomass hot air furnace;

[0018] Figure 3 This utility model provides a three-dimensional sectional view of another part of an environmentally friendly biomass hot air furnace.

[0019] Figure 4 This utility model presents a three-dimensional view of an environmentally friendly biomass hot air furnace from another angle.

[0020] Legend: 1. Heating chamber; 11. Support frame; 12. Heat recovery pipe; 13. Feed support; 14. Support plate; 15. Limiting sliding groove; 2. Complete combustion mechanism; 201. Motor; 202. First rotating shaft seat; 203. First pulley; 204. Transmission belt; 205. Second pulley; 206. Second rotating shaft seat; 207. Transmission rod; 208. Transmission arm; 209. Reciprocating rod; 210. Force rod; 211. Combustion screen frame; 212. Limiting sliding block; 213. Ash filter screen; 3. Conveying and preheating mechanism; 301. Preheating chamber; 302. Screwdriver; 303. Heat conduction hole; 304. Feeding flange connection pipe; 305. Feed inlet; 4. Hot air pipe; 41. Air collection chamber; 42. External flange pipe; 5. Ash hopper; 51. Electric gate; 6. Sealing chamber. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figures 1-4 As shown, this utility model provides an environmentally friendly biomass hot air furnace, including a heating chamber 1. A support frame 11 is fixedly connected to the outer surface of the heating chamber 1, and a combustion-perfecting mechanism 2 is provided on the top of the support frame 11. The combustion-perfecting mechanism 2 includes a motor 201, an auger 302 is fixedly connected to the output end of the motor 201, a first rotating shaft seat 202 is fixedly connected to one end of the auger 302, and first pulleys 203 are fixedly connected to the output end of the motor 201 and the outer wall of the first rotating shaft seat 202. A transmission belt 204 is sleeved on the outer wall of each first pulley 203, and a second belt is drivenly connected to the inner wall of each transmission belt 204. Each second pulley 205 has a second rotating shaft seat 206 rotatably connected inside. Each second pulley 205 has a transmission rod 207 screwed to its outer surface. Each transmission rod 207 has a transmission arm 208 rotatably connected to its outer wall. Each transmission arm 208 has a reciprocating rod 209 rotatably connected to its outer side via a shaft. Each reciprocating rod 209 has a force-bearing rod 210 fixedly inserted inside. A combustion screen frame 211 is fixedly connected to the opposite ends of the two force-bearing rods 210. Limiting sliding blocks 212 are fixedly connected to both sides of the combustion screen frame 211. A filter screen 213 is fixedly fixed to the opposite side of the limiting sliding blocks 212.

[0024] The overall effect of Embodiment 1 is as follows: when the motor 201 starts, the rotational power at the output end is first transmitted to the auger 302, causing it to begin conveying biomass fuel. Simultaneously, the output end of the motor 201 drives the first pulley 203 to rotate. Through the transmission belt 204, the second pulley 205 rotates accordingly. The second pulley 205 drives the transmission rod 207 to perform circular motion. The transmission rod 207, through the transmission arm 208, converts the circular motion into linear reciprocating motion of the reciprocating rod 209 and the force-bearing rod 210, thereby causing the combustion screen frame 211 to reciprocate within the heating chamber 1. During the reciprocating motion of the combustion screen frame 211, the biomass fuel within is continuously agitated. On the one hand, the originally accumulated fuel is dispersed, increasing the contact area with air and providing good conditions for complete combustion, allowing the fuel to obtain more oxygen and thus improving combustion efficiency. On the other hand, the limiting sliding blocks 212 on both sides of the combustion screen frame 211 slide in the limiting structure of the heating chamber 1, ensuring the stability of the movement trajectory of the combustion screen frame 211 and avoiding deviation or jamming during shaking. The ash filter screen 213 is tightly attached to the limiting sliding block 212, which can effectively intercept the ash generated during combustion, prevent the ash from falling into the bottom of the heating chamber 1 and accumulating, avoid affecting the normal operation of the equipment due to ash accumulation, keep the combustion area clean, and ensure the continuous and stable operation of the combustion process.

[0025] Example 2: Figures 1-4 As shown, the output end of the motor 201 is equipped with a conveying preheating mechanism 3; the conveying preheating mechanism 3 includes a preheating chamber 301, the inner wall of the preheating chamber 301 and the outer wall of the auger 302 cooperate with each other, a set of heat conduction holes 303 are opened on the outer wall of the preheating chamber 301, a feeding flange connecting pipe 304 is fixedly connected to the outer wall of the preheating chamber 301, an inlet 305 is opened on the outer wall of the preheating chamber 301, a set of heat recovery pipes 12 are fixedly connected to the top of the heating chamber 1, the set of heat recovery pipes 12 are interconnected with the preheating chamber 301 through the feeding bracket 13, the feeding bracket 13 and the inlet 305 are interconnected, a support plate 14 is fixedly connected to the top of the heating chamber 1, and the top of the support plate 14 is fixedly connected to the outer wall of the preheating chamber 301.

[0026] The overall effect of Embodiment 2 is that during the operation of the hot blast stove, the combustion of biomass fuel in the heating chamber 1 releases a large amount of heat. Part of this heat is guided to the preheating chamber 301 through the heat recovery pipe 12. The heat conduction holes 303 on the outer wall of the preheating chamber 301 act like small windows for heat transfer, which can evenly distribute the recovered heat into the chamber. When the biomass fuel enters the preheating chamber 301 from the feeding flange connection pipe 304, the auger 302 starts to work, pushing the fuel to move in the chamber. During the movement, the fuel comes into contact with the inner wall of the preheating chamber 301 and continuously absorbs the heat transferred in through the heat conduction holes 303. The increased movement path of the fuel within the preheating chamber 301 leads to a gradual increase in the amount of heat absorbed, achieving a preheating effect. After preheating, the fuel enters the heating chamber 1, where its internal molecular activity increases due to the rise in temperature, making it easier to react with oxygen and thus easier to ignite. Furthermore, it can more fully combine with oxygen during combustion, reducing incomplete combustion. This preheating method effectively reduces the initial energy consumption required for fuel combustion and improves the overall energy utilization efficiency of the hot air furnace. At the same time, the support plate 14 securely connects the preheating chamber 301 to the heating chamber 1, ensuring the stability of the preheating chamber 301 during operation and making the preheating process reliable and continuous.

[0027] Example 3: As Figures 1-4 As shown, a set of limiting sliding grooves 15 are provided on the opposite side of the heating chamber 1. Each force rod 210 and the limiting sliding block 212 are slidably disposed inside the limiting sliding groove 15. The outer surface of each second rotating shaft seat 206 is fixedly connected to the outer surface of the heating chamber 1. A set of hot air pipes 4 are inserted inside the heating chamber 1. Both ends of the hot air pipes 4 are fixedly connected to the air collecting chambers 41. The outer surface of each air collecting chamber 41 is fixedly connected to the external flange pipe 42. The two external flange pipes 42 are respectively connected to the air intake device and the air exhaust device.

[0028] The overall effect of embodiment 3 is that when the combustion completion mechanism 2 is running, the force-bearing rod 210 and the limiting sliding block 212 slide within the limiting sliding groove 15. The design of the limiting sliding groove 15 provides them with a precise movement track, just like a train track guides a train, ensuring that the force-bearing rod 210 and the limiting sliding block 212 can only move in a specific direction, thereby making the reciprocating motion of the combustion screen frame 211 more precise and stable. During the fuel combustion process, a large amount of high-temperature hot air is generated. This hot air first enters the hot air pipe 4. The hot air pipe 4 serves as a hot air transmission channel, capable of... It can efficiently collect hot air, which flows in the hot air duct 4 to the air collection chambers 41 at both ends. The air collection chambers 41 collect and organize the hot air, so that the hot air can enter the external flange pipe 42 in a more orderly manner. The external flange pipe 42 is connected to the air intake and exhaust equipment. According to the needs of different usage scenarios, the hot air can be directed to places that need to be heated, such as drying workshops and greenhouses; or the hot air can be recycled, and some of the hot air can be reintroduced into the heating chamber 1 or other areas that need hot air, thereby improving the utilization rate of heat energy and meeting diverse heating needs.

[0029] Example 4: Figures 1-4 As shown, the bottom of the heating chamber 1 is fixedly connected to the ash storage chamber 5, and an electric gate 51 is fixedly installed on the outer surface of the ash storage chamber 5. Both sides of the heating chamber 1 are fixedly connected to the sealing chamber 6. Each reciprocating rod 209 is correspondingly slidably inserted into the interior of the sealing chamber 6, and each limiting sliding groove 15 is correspondingly sealed through the sealing chamber 6.

[0030] The overall effect of Embodiment 4 is that during the combustion process of the hot blast stove, the ash produced by the combustion of biomass fuel will fall naturally under the action of gravity. Since the bottom of the heating chamber 1 is fixedly connected to the ash collection chamber 5, the ash will fall into the ash collection chamber 5 along the channel. As the hot blast stove continues to operate, the ash in the ash collection chamber 5 gradually accumulates. When a certain amount is reached and cleaning is required, simply activate the electric gate 51. The electric gate 51 is opened by electric drive, and the ash can be discharged smoothly, which conveniently and quickly completes the centralized cleaning of ash, maintains a clean environment inside the heating chamber 1, and reduces manual cleaning. The sealing chamber 6 tightly wraps around the reciprocating rod 209 and the limiting sliding groove 15, forming a tight barrier. When the combustion mechanism 2 is running and the reciprocating rod 209 slides inside the sealing chamber 6, the sealing chamber 6 can effectively prevent the hot air and dust in the heating chamber 1 from leaking out through the gap between the reciprocating rod 209 and the limiting sliding groove 15. This not only avoids energy waste caused by heat loss, but also prevents dust from spreading and polluting the surrounding environment, ensuring the safety of the operator's working environment, and also improving the safety and environmental performance of the equipment operation.

[0031] Working Principle: Fuel Delivery and Preheating Stage: The motor 201 is started, and its output drives the auger 302 to rotate. Biomass fuel enters the preheating chamber 301 through the feeding flange connection pipe 304. Driven by the spiral blades of the auger 302, it moves along the inner wall of the preheating chamber 301 towards the inlet 305. During this process, the heat generated by combustion in the heating chamber 1 is transferred to the preheating chamber 301 through the heat recovery pipe 12. The heat-conducting holes 303 on the outer wall of the preheating chamber 301 transfer heat into the chamber, exchanging heat with the moving fuel. The fuel is preheated and then enters the heating chamber 1 through the feed support 13 and the feed port 305. During the fuel combustion stage: the output of the motor 201 drives the first pulley 203 to rotate, and the first pulley 203 drives the second pulley 205 to rotate through the transmission belt 204. When the second pulley 205 rotates, the transmission rod 207 fixedly connected to it makes a circular motion. The transmission rod 207 converts the circular motion into the linear reciprocating motion of the reciprocating rod 209 and the force rod 210 through the transmission arm 208, thereby causing the combustion screen frame 211 to move along the inside of the heating chamber 1. The limiting sliding groove 15 reciprocates, causing the combustion screen frame 211 to swirl and continuously agitate the biomass fuel, ensuring full contact with air and thus achieving complete combustion. In the hot air delivery and circulation stage: the high-temperature hot air generated by fuel combustion enters the hot air pipe 4 inside the heating chamber 1. The hot air pipe 4 collects the hot air and delivers it to the air collection chambers 41 at both ends. The air collection chambers 41 collect and organize the hot air, then deliver it out through the external flange pipe 42. The external flange pipe 42 connects to the air intake and exhaust equipment respectively. Depending on actual needs, the hot air can be directed to specific locations. The system can also recycle some of the hot air to the location where heating is required, thereby improving the efficiency of heat energy utilization. Ash treatment and equipment sealing stage: The ash generated during the combustion process falls into the ash collection bin 5 at the bottom of the heating chamber 1 under the action of gravity. When it is necessary to clean the ash, the electric gate 51 is activated to open the outlet of the ash collection bin 5 and discharge the ash. At the same time, the sealing bin 6 tightly wraps the reciprocating rod 209 and the limiting sliding groove 15 to ensure that the internal hot air and dust will not leak out during the operation of the equipment, maintain the stable operation of the equipment, and ensure the safety and cleanliness of the working environment.

[0032] The wiring diagrams of the motor 201 and the electric gate 51 in this utility model are common knowledge in the field. Their working principle is a well-known technology. The appropriate model is selected according to the actual use. Therefore, the control method and wiring layout of the motor 201 and the electric gate 51 will not be explained in detail.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An environmentally friendly biomass hot air furnace, characterized in that, include: Heating chamber (1), the outer surface of which is fixedly connected to a support frame (11), and the top of the support frame (11) is provided with a combustion completion mechanism (2). The combustion completion mechanism (2) includes a motor (201), the output end of which is fixedly connected to an auger (302), one end of which is fixedly connected to a first rotating shaft seat (202), the output end of the motor (201) and the outer wall of the first rotating shaft seat (202) are both fixedly connected to a first pulley (203), the outer wall of each first pulley (203) is fitted with a transmission belt (204), the inner wall of each transmission belt (204) is connected to a second pulley (205), and the interior of each second pulley (205) is rotatably connected to a second rotating shaft seat (206). Each of the second pulleys (205) has a transmission rod (207) screwed to its outer surface. The outer wall of the transmission rod (207) is rotatably connected to a transmission arm (208). The outside of each transmission arm (208) is rotatably connected to a reciprocating rod (209) via a shaft. A force-bearing rod (210) is fixedly inserted inside each reciprocating rod (209). A combustion screen frame (211) is fixedly connected to the opposite ends of the two force-bearing rods (210). Limiting sliding blocks (212) are fixedly connected to both sides of the combustion screen frame (211). A filter screen (213) is fixed to the opposite side of the limiting sliding block (212).

2. The environmentally friendly biomass hot air furnace according to claim 1, characterized in that: The output end of the motor (201) is provided with a conveying preheating mechanism (3); The conveying preheating mechanism (3) includes a preheating chamber (301), the inner wall of the preheating chamber (301) and the outer wall of the auger (302) cooperate with each other, a set of heat conduction holes (303) are opened on the outer wall of the preheating chamber (301), a feeding flange connecting pipe (304) is fixedly connected to the outer wall of the preheating chamber (301), and a feeding port (305) is opened on the outer wall of the preheating chamber (301).

3. The environmentally friendly biomass hot air furnace according to claim 1, characterized in that: The top of the heating chamber (1) is fixedly connected to a set of heat recovery pipes (12), and the set of heat recovery pipes (12) are interconnected with the preheating chamber (301) through the feeding bracket (13).

4. The environmentally friendly biomass hot air furnace according to claim 3, characterized in that: The feeding bracket (13) and the feeding port (305) are interconnected.

5. The environmentally friendly biomass hot air furnace according to claim 3, characterized in that: The top of the heating chamber (1) is fixedly connected to a support plate (14), and the top of the support plate (14) is fixedly connected to the outer wall of the preheating chamber (301).

6. The environmentally friendly biomass hot air furnace according to claim 5, characterized in that: A set of limiting sliding grooves (15) are provided on the opposite side of the heating chamber (1). Each force rod (210) and limiting sliding block (212) are slidably disposed inside the limiting sliding groove (15). The outer surface of each second rotating shaft seat (206) is fixedly connected to the outer surface of the heating chamber (1).

7. The environmentally friendly biomass hot air furnace according to claim 6, characterized in that: A set of hot air pipes (4) are inserted inside the heating chamber (1). Both ends of the hot air pipes (4) are fixedly connected to air collection chambers (41). The outer surface of each air collection chamber (41) is fixedly connected to an external flange pipe (42). The two external flange pipes (42) are respectively connected to the air intake device and the air exhaust device.

8. The environmentally friendly biomass hot air furnace according to claim 7, characterized in that: The bottom of the heating chamber (1) is fixedly connected to the ash storage chamber (5), and an electric gate (51) is fixedly installed on the outer surface of the ash storage chamber (5). Both sides of the heating chamber (1) are fixedly connected to the sealing chamber (6). Each reciprocating rod (209) is correspondingly slidably inserted into the interior of the sealing chamber (6), and each limiting sliding groove (15) is correspondingly sealed through the sealing chamber (6).

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