Intelligent inspection device for coal conveying belt

Abstract

The present application belongs to the technical field of thermal power plant monitoring equipment, and particularly relates to a coal conveying belt intelligent inspection equipment, wherein a belt component is installed in a preset area, and a prediction line is arranged on the belt component; a supporting component is arranged above the belt component; a collecting component is arranged on the supporting component; an electrical signal connection is formed between the collecting component and the control component; the temperature, height and image information of the material on the belt component are monitored by the collecting component, and are fed back to the control component; compared with the traditional manual inspection, the real-time inspection effect is achieved, the areas that are not easy to reach can be reached, and the operation is more stable; the belt and the material are monitored in multiple dimensions by using the image collecting component, the temperature detecting component and the distance detecting component, the multiple dimension information is collected and analyzed, the operation of the belt is monitored, the abnormal points on the belt are accurately positioned, the abnormalities of the belt are timely found, and the alarm information is sent by the control component.

Description

Technical Field

[0001] This invention belongs to the technical field of monitoring equipment for thermal power plants, and particularly relates to an intelligent inspection device for coal conveyor belts. Background Technology

[0002] The coal conveying system of a thermal power plant is fundamental to ensuring the stable operation of the generating units. Unstable operation of the coal conveying system can lead to the generator units shutting down at any time, causing significant disruption to power production. Coal is the raw material for power generation; it is transported safely to the boiler via conveyor belts to burn, continuously converting thermal energy into electrical energy. If the coal conveying system cannot reliably deliver coal to the boiler's coal bunker, the boiler may shut down due to lack of fuel supply. Thermal power units consume huge amounts of coal, so coal yards are typically located near easily accessible locations. The distance from the coal yard to the boiler is often considerable, necessitating multi-stage conveyor belts for transportation. To ensure safe and continuous coal transport, thermal power plants assign dedicated personnel to inspect each section of the conveyor belt. However, the working environment of the conveyor belts is harsh, with severe dust pollution, posing significant safety risks to workers and impacting the safe operation of the thermal power units. The main problems and limitations of manual inspections currently exist:

[0003] 1. Traditional manual inspection methods cannot perform real-time inspections of the coal conveying system. Moreover, inspections cannot be carried out in high-risk areas and areas that are inaccessible to manual personnel during the operation of the coal conveyor belt, which can easily lead to equipment failure and cause the coal conveyor belt to stop operating.

[0004] 2. During operation, manual inspection cannot determine whether the coal conveyor belt is damaged or cracked, nor can it make quantitative judgments on the coal powder concentration and noise of the coal conveying system. The inspection work cannot be carried out in a precise manner, which can easily lead to missed inspections, threatening the stable operation of the coal conveyor belt and thus threatening the safe production of thermal power units.

[0005] 3. Traditional inspection methods cannot accurately detect the temperature data of the coal conveyor belt and the idler rollers, and cannot determine faults such as smoldering of coal flow and idler roller jamming.

[0006] 4. Due to the long distance of the coal conveying system, coal needs to be transported to the boiler coal bunker through multiple conveyor belts. Power plants need to assign dedicated inspection personnel to each conveyor belt, resulting in a significant waste of manpower and economic costs. Furthermore, the high-risk working areas along the coal conveyor belts also pose a threat to the personal safety of the inspection personnel. Summary of the Invention

[0007] The purpose of this invention is to provide an intelligent inspection device for coal conveyor belts to solve the technical problems of low efficiency and inability to monitor in real time in traditional inspection methods.

[0008] To solve the above-mentioned technical problems, the specific technical solution of the present invention is as follows:

[0009] In some embodiments of this application, an intelligent inspection device for coal conveyor belts is provided, comprising:

[0010] A belt assembly, which is installed in a preset area and has a prediction line on it;

[0011] A support component is symmetrically arranged above the belt component, and its position corresponds to that of the belt component;

[0012] A data acquisition component is mounted on a support component and is slidably connected to the support component.

[0013] The control component is electrically connected to the acquisition component.

[0014] The data acquisition unit collects images of the material on the conveyor belt, including material temperature, material capacity, and whether the material covers the prediction line. This information is then fed back to the control unit for processing and analysis. Managers monitor the system through the control unit.

[0015] In some embodiments of this application, the data acquisition component is a modular structure, including:

[0016] The first housing component is divided into an upper chamber and a lower chamber by a partition.

[0017] The upper chamber has a through hole on its side wall, through which the support component enters the upper chamber;

[0018] A driving component is located in the upper cavity, connected to the support component, and electrically connected to the control component.

[0019] The acquisition component is located in the lower chamber and is fixedly connected to the first housing component, and is electrically connected to the control component.

[0020] In some embodiments of this application, the driving component is a combined structure, including:

[0021] The motor components are symmetrically arranged on both sides of the support component and are fixedly connected to the first housing component.

[0022] A rotating component is located on the rotating end of the motor component and is slidably connected to the supporting component.

[0023] In some embodiments of this application, the acquisition component has a split structure, including:

[0024] An integrated component, located in the lower cavity, is electrically connected to the control component.

[0025] An image acquisition component is located at the bottom of the first housing component, at the center of the first housing component, and is electrically connected to the integrated component.

[0026] A temperature detection component is arranged in a ring array at the bottom of the first housing component and is electrically connected to the integrated component.

[0027] A distance detection component is symmetrically arranged at the bottom of the first housing component and is electrically connected to the integrated component.

[0028] In some embodiments of this application, the control component is a modular structure, including:

[0029] A signal receiving unit is provided, which is equipped with a command input unit and is electrically connected to the acquisition component.

[0030] The processing unit is coupled to the signal receiving unit, which receives the signal converted by the signal receiving unit and processes and analyzes it.

[0031] The display unit is coupled to the processing unit, and receives instruction signals from the processing unit and converts them into images for display.

[0032] The warning unit is coupled to the processing unit, receives instruction signals from the processing unit, and provides audible and visual warnings.

[0033] A signal output unit is coupled to the processing unit and electrically connected to the driving component.

[0034] In some embodiments of this application, the processing unit includes:

[0035] A data preprocessing module, which is coupled to the signal receiving unit, performs intelligent classification processing on the data fed back by the signal receiving unit;

[0036] The feature extraction module is coupled to the data preprocessing module. It extracts and filters feature data from the data after intelligent classification.

[0037] The algorithm module, which is coupled to the feature extraction module, performs calculations on the selected feature data and outputs instructions based on the calculation results.

[0038] In some embodiments of this application, the feature data of the feature extraction module includes: material image data, material temperature data, material height data, and belt surface data.

[0039] In some embodiments of this application, a fire extinguishing component is further included, which is disposed on a support component and is electrically connected to a control component.

[0040] Fire extinguishing components include:

[0041] The second housing component is mounted on the support component and has a drive component inside it;

[0042] The fire extinguishing component is located at the bottom of the second housing component and is electrically connected to the control component.

[0043] In some embodiments of this application, the fire extinguishing component is a modular structure, including:

[0044] A liquid storage component, wherein fire extinguishing liquid is provided inside the liquid storage component and is located at the bottom of the second housing component;

[0045] A pump suction component is located at the bottom of the liquid storage component, with its inlet end connected to the liquid storage component and its outlet end equipped with a nozzle component.

[0046] In some embodiments of this application, the pump suction component is a combined structure, including:

[0047] The housing component is internally divided into a first chamber, a second chamber, and a third chamber by a first partition component and a second partition component;

[0048] The first partition component and the second partition component are arranged symmetrically, and are provided with symmetrically arranged locking grooves;

[0049] A sliding cavity is formed between adjacent slots;

[0050] The sliding cavity is located in the second chamber;

[0051] The first partition component is provided with a first piston and a second piston symmetrical about the locking groove;

[0052] The second partition component is provided with a third piston and a fourth piston symmetrical about the locking groove;

[0053] A telescopic component is provided on the housing component, and its telescopic end penetrates through the housing component into the second chamber;

[0054] The piston component is disposed in the sliding cavity and is slidably connected to the first partition component and the second partition component, and is fixedly connected to the telescopic end of the telescopic component.

[0055] Compared with existing technologies, the advantages of this invention are as follows: by monitoring the temperature, height, and image information of the material on the conveyor belt using acquisition components and feeding this information back to the control components, it not only achieves real-time inspection compared to traditional manual inspection, but also reaches hard-to-reach areas, resulting in more stable operation; by employing image acquisition components, temperature detection components, and distance detection components to perform multi-dimensional monitoring of the conveyor belt and materials, and by collecting and analyzing multi-dimensional information, it monitors the operation of the conveyor belt, accurately locates abnormal points on the belt, promptly detects belt abnormalities, and issues alarm information through the control components; and by adding fire extinguishing components to handle emergencies, it further improves the stability and reliability of equipment operation. Attached Figure Description

[0056] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0057] Figure 1 This is a schematic diagram of the overall installation structure provided in an embodiment of the present invention;

[0058] Figure 2 This is a schematic diagram of the acquisition component structure provided in an embodiment of the present invention;

[0059] Figure 3 This is a schematic diagram of the drive component structure provided in an embodiment of the present invention;

[0060] Figure 4 This is a schematic diagram of the fire extinguishing component structure provided in an embodiment of the present invention;

[0061] Figure 5 This is a schematic diagram of the pump suction component structure provided in an embodiment of the present invention. Detailed Implementation

[0062] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0063] To better understand the purpose, structure, and function of this invention, the following description is provided in conjunction with the appendix. Figure 1-5 The present invention will be described in further detail below.

[0064] According to some embodiments of this application, including:

[0065] The belt component 1 is a material conveyor belt, which is used to convey materials in the shape of blocks, powders, etc. There are no restrictions on this. The belt component 1 is installed in the preset area and a prediction line is provided on the belt component 1. The prediction line is a standard line. The material is stored within the range of the standard line. The standard line can be made of a material of a different color than the belt component 1.

[0066] The support component 2 is a rope, cable, chain or other structure. The support component 2 is symmetrically arranged above the belt component 1 and corresponds to the position of the belt component 1.

[0067] The acquisition component 3 is mounted on the support component 2 and is slidably connected to the support component 2.

[0068] It should be noted that the acquisition component 3 is a modular structure, including:

[0069] The first box component 4 has a hollow box structure. The interior of the first box component 4 is divided into an upper chamber and a lower chamber by a partition. The side wall of the upper chamber is provided with a through hole, and the support component 2 enters the upper chamber through the through hole.

[0070] Drive component 5, located in the upper cavity, is connected to support component 2 and electrically connected to control component; drive component 5 includes:

[0071] The motor component 501 is a stepper motor or servo motor, etc. The motor component 501 is symmetrically arranged on both sides of the support component 2 and is fixedly connected to the first housing component 4.

[0072] The rotating component 502 is a structure such as a disc or roller. The rotating component 502 is located on the rotating end of the motor component 501 and is slidably connected to the support component 2. The motor component 501 drives the rotating component 502 to rotate, thereby causing friction between the rotating component 502 and the support component 2, which in turn causes the first housing component 4 to move.

[0073] Acquisition component 6, located in the lower cavity, is fixedly connected to the first housing component 4 and electrically connected to the control component. Acquisition component 6 includes:

[0074] The integrated component has a circuit board structure and is located in the lower cavity, where it is electrically connected to the control component.

[0075] The image acquisition component 601 is an infrared thermal imager and a camera. The image acquisition component 601 is located at the bottom of the first housing component 4 and at the center of the first housing component 4. It is electrically connected to the integrated component and is used to acquire image information of the belt component 1 and image information of the material on the belt component 1.

[0076] The temperature detection component 602 is a temperature sensor. The temperature detection component 602 is arranged in a ring array at the bottom of the first housing component 4. It is electrically connected to the integrated component and is used to detect the temperature information of the belt component 1 and the material on the belt component 1.

[0077] The distance detection component 603 is a distance sensor. The distance detection component 603 is symmetrically arranged at the bottom of the first box component 4. It is electrically connected to the integrated component and is used to detect the distance between the material and the bottom of the first box component 4, thereby determining the height of the material on the belt component 1.

[0078] The control component can be an industrial control computer or similar device equipped with system software, and there are no restrictions on its use.

[0079] The technical effects achieved by the above technical solution are as follows:

[0080] The data acquisition unit 3 collects material images, material temperature, material capacity, and whether the material covers the prediction line on the belt component 1, and then feeds this information back to the control unit for processing and analysis. Managers monitor the belt component through the control unit. By setting up corresponding support components 2 above the belt component 1, the data acquisition unit 3 can perform comprehensive monitoring of the belt component 1. This is more comprehensive and accurate than manual inspection and monitoring, providing a foundation for improving monitoring efficiency and accuracy.

[0081] The technical solution described above is adopted in the embodiments of this application, wherein the control component is a combined structure, including:

[0082] The signal receiving unit is equipped with a command input unit and is electrically connected to the acquisition component 6. It receives and converts the information data acquired by the acquisition component 3 and feeds it back to the processing unit.

[0083] A processing unit, coupled to a signal receiving unit, receives the signal converted by the signal receiving unit and processes and analyzes it. The processing unit includes:

[0084] The data preprocessing module is coupled to the signal receiving unit. It performs intelligent classification processing on the data fed back by the signal receiving unit, that is, it divides the data fed back by the signal receiving unit into temperature information, material image information, belt image information, material height information, and material temperature information.

[0085] The feature extraction module is coupled to the data preprocessing module. It extracts and filters feature data from the data after intelligent classification, specifically filtering out abnormal temperature information, abnormal belt image information, abnormal material height information, and belt operation information under normal conditions.

[0086] The algorithm module is coupled to the feature extraction module. It performs calculations on the selected feature data and outputs instructions based on the calculation results.

[0087] The display unit is a display screen, which is coupled to the processing unit. It receives instruction signals from the processing unit and converts them into images for display. The display unit displays the surface status information, material status information, and abnormal data information of the current belt component 1.

[0088] The early warning unit is an audible and visual alarm. The early warning unit is coupled to the processing unit, receives the instruction signal from the processing unit, and provides audible and visual early warning reminders.

[0089] The signal output unit is coupled to the processing unit and electrically connected to the driving component 5.

[0090] The technical effects achieved by the above technical solution in the embodiments of this application are as follows:

[0091] The command input unit sends a signal to the processing unit, presets the movement frequency and speed of the drive component 5 on the support component 2, and sends a signal to the motor component 501 through the signal output unit. The motor component 501 drives the rotating component 502 to rotate, thereby causing the first box component 4 to move along the support component 2. This allows the acquisition component 3 to collect data on the belt component 1 and the material on the belt component 1. The collected material image information, material temperature information, material height information, and belt image information are transmitted to the signal receiving unit. The signal receiving unit converts the data and feeds it back to the data preprocessing module. The data preprocessing module processes and classifies the data, and the feature extraction module extracts the feature data. The algorithm module then performs calculations, and the calculation results are displayed through the display unit. When the calculation result is abnormal, the early warning unit issues an early warning to alert the supervisor. By adopting a multi-faceted data acquisition, calculation, and automated management setting method, not only is the comprehensiveness and efficiency of monitoring improved, but the accuracy of monitoring is also improved.

[0092] The above technical solution is adopted in the embodiments of this application. In order to prevent the material on the belt component 1 from spontaneously combusting or overheating, it also includes: a fire extinguishing component 7, which is disposed on the support component 2 and is electrically connected to the control component.

[0093] Fire extinguishing component 7 includes:

[0094] The second box component 701 has a hollow box structure. The second box component 701 is mounted on the support component 2 and has a drive component 5 inside. The drive component 5 drives the second box component 701 to move on the support component 2.

[0095] Fire extinguishing assembly 702, wherein the fire extinguishing assembly 702 is disposed at the bottom of the second housing component 701 and is electrically connected to the control component, the fire extinguishing assembly 702 includes:

[0096] The liquid storage component 703 has a box-type structure. The liquid storage component 703 contains fire extinguishing liquid, which is located at the bottom of the second box component 701. The fire extinguishing liquid is made of a material used for fire extinguishing.

[0097] A pump suction component 704 is located at the bottom of a liquid storage component 703. Its inlet end is connected to the liquid storage component 703, and its outlet end is equipped with a nozzle component 705. In order to prevent the fire extinguishing source from continuously entering the pump suction component 704, a solenoid valve is also provided on the inlet end of the pump suction component 704. The solenoid valve is electrically connected to the control component.

[0098] It should be noted that the pump suction component 704 is a modular structure, including:

[0099] The housing component 7041 is internally divided into a first chamber 70411, a second chamber 70412, and a third chamber 70413 by a first partition component 7042 and a second partition component 7043. The first partition component 7042 and the second partition component 7043 are symmetrically arranged and have symmetrically arranged locking grooves. A sliding cavity 70414 is formed between adjacent locking grooves. The sliding cavity 70414 is located in the second chamber 70412.

[0100] The first partition component 7042 is provided with a first piston component 70421 and a second piston component 70422 symmetrical about the locking groove;

[0101] The second partition component 7043 is provided with a third piston component 70431 and a fourth piston component 70432 symmetrical about the locking groove;

[0102] The first piston component 70421, the second piston component 70422, the third piston component 70431, and the fourth piston component 70432 have an I-shaped structure. The working states of the first piston component 70421 and the third piston component 70431 are opposite to those of the second piston component 70422 and the fourth piston component 70432.

[0103] The telescopic component 7044 is a structure whose output end can be extended or retracted, such as a hydraulic telescopic device or a mechanical telescopic device. It is preferably a miniature telescopic cylinder. The telescopic component 7044 is disposed on the housing component 7041, and its telescopic end passes through the housing component 7041 to the second chamber 70412.

[0104] The piston component 7045 has a block structure and is disposed in the sliding cavity 70414. It is slidably connected to the first partition component 7042 and the second partition component 7043, and is fixedly connected to the telescopic end of the telescopic component 7044.

[0105] When an abnormality is detected in the control unit, the control unit issues a command to the drive unit 5, causing the second housing unit 701 to move on the support unit 2, thereby causing the fire extinguishing assembly 702 to extinguish the fire on the belt assembly 1. The control unit opens the solenoid valve, allowing the fire extinguishing source in the liquid storage unit 703 to enter the first chamber 70411. The piston assembly 7045 moves in the sliding chamber 70414 via the telescopic component 7044. During the movement of the piston assembly 7045, the first piston 70421 and the third piston 70431 open or close, and the second piston 70422 and the fourth piston 70432 close or open, allowing the fire extinguishing source in the first chamber 70411 to enter the second chamber 70412 and flow out from the third chamber 70413, and be sprayed out through the nozzle assembly 705. After the fire is extinguished, the control unit closes the solenoid valve to prevent the fire extinguishing source from entering the first chamber 70411.

[0106] The technical effects achieved by the above technical solution in the embodiments of this application are as follows:

[0107] By adding a fire extinguishing component 7 to the support component 2, it is easier to deal with emergencies and prevent materials from burning. By adopting a piston-driven method, not only can the fire extinguishing source be continuously sprayed, but also a uniform output can be maintained, thereby improving the stability and reliability of the overall equipment operation.

[0108] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0109] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0110] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0111] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0112] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent inspection device for coal conveyor belts, characterized in that, include: A belt assembly, which is installed in a preset area and has a prediction line on it; A support component is symmetrically arranged above the belt component, and its position corresponds to that of the belt component; A data acquisition component is mounted on a support component and is slidably connected to the support component. The control component is electrically connected to the acquisition component. The data acquisition unit collects images of the material on the conveyor belt, including material temperature, material capacity, and whether the material covers the prediction line. These data are then fed back to the control unit for processing and analysis. Managers monitor the system through the control unit. The data acquisition component is a modular structure, including: The first housing component is divided into an upper chamber and a lower chamber by a partition. The upper chamber has a through hole on its side wall, through which the support component enters the upper chamber; A driving component is located in the upper cavity, connected to the support component, and electrically connected to the control component. The acquisition component is located in the lower chamber and is fixedly connected to the first housing component, and is electrically connected to the control component. The drive component is a modular structure, including: The motor components are symmetrically arranged on both sides of the support component and are fixedly connected to the first housing component. A rotating component is located on the rotating end of the motor component and is slidably connected to the supporting component. The acquisition component has a split structure, including: An integrated component, located in the lower cavity, is electrically connected to the control component. An image acquisition component is located at the bottom of the first housing component, at the center of the first housing component, and is electrically connected to the integrated component. A temperature detection component is arranged in a ring array at the bottom of the first housing component and is electrically connected to the integrated component. A distance detection component is symmetrically arranged at the bottom of the first housing component and is electrically connected to the integrated component. The control component is a modular structure, including: A signal receiving unit is provided, which is equipped with a command input unit and is electrically connected to the acquisition component. The processing unit is coupled to the signal receiving unit, which receives the signal converted by the signal receiving unit and processes and analyzes it. The display unit is coupled to the processing unit, and receives instruction signals from the processing unit and converts them into images for display. The warning unit is coupled to the processing unit, receives instruction signals from the processing unit, and provides audible and visual warnings. A signal output unit is coupled to the processing unit and electrically connected to the driving component.

2. The intelligent inspection device for coal conveyor belts according to claim 1, characterized in that, The processing unit includes: A data preprocessing module, which is coupled to the signal receiving unit, performs intelligent classification processing on the data fed back by the signal receiving unit; The feature extraction module is coupled to the data preprocessing module. It extracts and filters feature data from the data after intelligent classification. The algorithm module, which is coupled to the feature extraction module, performs calculations on the selected feature data and outputs instructions based on the calculation results.

3. The intelligent inspection device for coal conveyor belts according to claim 2, characterized in that, The feature data of the feature extraction module includes: material image data, material temperature data, material height data, and belt surface data.

4. The intelligent inspection device for coal conveyor belts according to claim 3, characterized in that, Also includes: A fire extinguishing component, which is mounted on a supporting component and is electrically connected to a control component. Fire extinguishing components include: The second housing component is mounted on the support component and has a drive component inside it; The fire extinguishing component is located at the bottom of the second housing component and is electrically connected to the control component.

5. The intelligent inspection device for coal conveyor belts according to claim 4, characterized in that, The fire extinguishing assembly is a modular structure, including: A liquid storage component, wherein fire extinguishing liquid is provided inside the liquid storage component, which is located at the bottom of the second housing component; A pump suction component is located at the bottom of the liquid storage component, with its inlet end connected to the liquid storage component and its outlet end equipped with a nozzle component.

6. The intelligent inspection device for coal conveyor belts according to claim 5, characterized in that, The pump suction component is a modular structure, including: The housing component is internally divided into a first chamber, a second chamber, and a third chamber by a first partition component and a second partition component; The first partition component and the second partition component are arranged symmetrically, and are provided with symmetrically arranged locking grooves; A sliding cavity is formed between adjacent slots; The sliding cavity is located in the second chamber; The first partition component is provided with a first piston component and a second piston component symmetrical about the locking groove; The second partition component is provided with a third piston and a fourth piston symmetrical about the locking groove; A telescopic component is provided on the housing component, and its telescopic end penetrates through the housing component into the second chamber; The piston component is disposed in the sliding cavity and is slidably connected to the first partition component and the second partition component, and is fixedly connected to the telescopic end of the telescopic component.

Images