Portable air waste gas monitoring device

Abstract

The invention discloses a portable air waste gas monitoring device, which comprises an air shunting mechanism, a VOCS monitor and a clamping assembly, and is characterized in that the top end of the clamping assembly is provided with the VOCS monitor used for detecting VOCS in air; the front end of the VOCS monitor is provided with an air distribution mechanism which can automatically reduce the air inlet amount from the air inlet end of the VOCS monitor under the action of a certain external wind force. The air distribution mechanism is provided with an air distribution assembly which can automatically bounce and unfold under the action of a certain external wind force to conduct air distribution on the air inlet end of the VOCS monitor, and a rebound assembly which can automatically drive the air distribution assembly to bounce in a certain direction under the action of a certain external wind force. According to the VOCS monitor, the air inlet amount entering the VOCS monitor can be automatically reduced in the external strong wind environment, and the situation that the detection precision of the VOCS in the air is reduced due to the fact that the air inlet amount entering the VOCS monitor in the external strong wind environment is too large is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of air exhaust gas detection, and in particular to a portable air exhaust gas monitoring device. Background Art

[0002] At present, with the development of industrialization, pollution leaks are prone to occur in chemical plants and petrochemical plants in the early stage. When a leak occurs, it is impossible to quickly find the source of pollution, nor to quickly predict the spread of the pollution. If the pollution spreads to some public areas such as communities, parks, and office buildings, if it is not quickly handled and predicted, it will cause some environmental incidents and complaints, and generate related negative news. The current traditional pollution control methods are lacking in prevention, timeliness, and accuracy. In order to quickly understand the source of pollution, portable air exhaust monitoring devices are currently used to trace the source of pollution and accurately locate the source of pollution.

[0003] After testing, the patent announcement number CN115902127B discloses a portable IoT gas monitoring device, which relates to the field of gas monitoring technology. A portable IoT gas monitoring device includes a shell, one side of the shell is symmetrically provided with a circular through hole, the inner wall of the shell is fixedly connected to a sealing shell, the sealing shell is connected to a first connecting pipe, the inner bottom of the shell is fixedly connected to a circular shell, the first connecting pipe is connected to the circular shell, an air filtering mechanism is arranged inside the circular shell, the circular shell is connected to a second connecting pipe, the inner wall of the shell is fixedly connected to a gas monitor, the gas monitor is connected to the second connecting pipe, the inner side of the shell is provided with a third connecting pipe, the lower end of the third connecting pipe is connected to the circular shell, the upper part of the third connecting pipe is fixedly connected to a guide ring, and the middle part of the third connecting pipe is slidably connected to a fourth connecting pipe. The present invention utilizes the fourth connecting pipe to move upward to monitor air at different heights, so as to avoid the gas monitoring device being able to monitor only low-lying air, which causes limitations to the device.

[0004] When the existing portable air exhaust monitoring device is installed on the roof and performs VOCS detection on the air in a walking manner, the portable air exhaust monitoring device can normally detect the VOCS in the air when it is in an environment with no wind or relatively small external wind. When the portable air exhaust monitoring device is in an environment with strong external wind, the air intake amount entering the VOCS monitoring device will be too large. When the air intake amount entering the VOCS monitoring device is too large, the detection accuracy of the VOCS monitoring device will be reduced. Therefore, a portable air exhaust monitoring device is designed. Summary of the invention

[0005] In view of the defects or shortcomings of portable air exhaust gas monitoring devices, the purpose of the present invention is to provide a portable air exhaust gas monitoring device that can automatically reduce the air intake amount entering the VOCS monitor in an external strong wind environment, thereby avoiding the situation in which the air intake amount entering the VOCS monitor in an external strong wind environment is too large, resulting in a decrease in the detection accuracy of VOCS in the air.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0007] The present invention provides a portable air exhaust monitoring device, comprising an air diversion mechanism, a VOCS monitor and a clamping assembly, wherein a VOCS monitor for detecting VOCS in the air is installed at the top of the clamping assembly, and an air diversion mechanism for automatically reducing the air intake amount entering the air intake end of the VOCS monitor under a certain external wind force is arranged at the front end of the VOCS monitor;

[0008] The air diversion mechanism is provided with an air diversion component which automatically pops up and unfolds to divert air to the air inlet end of the VOCS monitor under the action of a certain external wind force, and a rebound component which automatically drives the air diversion component to pop up in a certain direction under the action of a certain external wind force. The air diversion mechanism is provided with a limiting component which automatically releases the limiting of the rebound component under the action of a certain external wind force.

[0009] Preferably, a shell is provided on the limiting assembly, and the shell is installed on the top of the mounting block, and the mounting block is provided at the front end of the clamping assembly, a movable plate is provided inside the shell, and a limiting groove is provided on the outer wall of the movable plate, and the first connecting column and the second connecting column are respectively installed at the center positions of the front end wall and the rear end wall of the movable plate.

[0010] Preferably, the other end of the first connecting column passes through the front end wall of the shell and extends to the outside to be connected to the air spoiler, and the other end of the second connecting column passes through the rear end wall of the shell and extends to the outside to be connected to the limit plate. A second spring is sleeved on the outside of the outer wall of the second connecting column, and the second spring is located between the rear end wall of the movable plate and the inner rear end wall of the shell.

[0011] Preferably, the upper and lower parts of the outer wall on one side of the movable plate are connected to the slider through a connecting rod, the other end of the slider is installed on the slide rail, and the slider and the slide rail are slidably connected, and the slide rail is installed above and below the inner wall on one side of the shell.

[0012] Preferably, an L-shaped connecting plate is provided on the air diversion assembly, an elastic sheet is installed on one outer wall of the L-shaped connecting plate, a first air diversion plate and a second air diversion plate are respectively installed on both sides of the outer wall of one side of the elastic sheet, ventilation holes are provided on the surfaces of the first air diversion plate and the second air diversion plate, a first groove is provided above and below the surface of the first air diversion plate, and a second groove is provided above and below the surface of the second air diversion plate.

[0013] Preferably, a first connecting block is provided in the first groove, and a second connecting block is provided in the second groove. The first connecting block is movably connected to the first movable rod through a movable pin, the other end of the first movable rod is movably connected to the second movable rod through a movable pin, and the other end of the second movable rod is movably connected to the second connecting block through a movable pin.

[0014] Preferably, a positioning block is installed at the bottom end of each of the first air splitter plate and the second air splitter plate, the other end of the positioning block is arranged in a positioning groove, and the positioning groove is opened at the top of the clamping assembly.

[0015] Preferably, the rebound assembly is composed of a first spring, a guide column, a limit column and a buffer shock-absorbing sleeve. A limit column is arranged on the circumferential outer wall at the bottom end of the guide column, and the other end of the limit column is arranged in the limit groove. A buffer shock-absorbing sleeve is arranged on the circumferential outer wall of the limit column. The top end of the guide column passes through the top end of the shell and extends to the outside of the shell to be connected with the L-shaped connecting plate. The outer side of the outer wall of the guide column is sleeved with a first spring, and the first spring is located between the shell and the L-shaped connecting plate.

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

[0017] 1. In the present invention, through the coordinated arrangement of a series of structures, when the device is installed on the roof and performs VOCS detection on the air in a walking manner, the VOCS monitor can normally detect the VOCS in the air in an environment where there is no wind or the external wind force is relatively small. When the device is in an environment with strong external wind force due to changes in the external environment during the detection process, the external wind will cause a certain force on the air spoiler, and the force on the air spoiler will be transmitted to the moving plate through the first connecting column. After the moving plate is subjected to a certain force, it will cause a certain compression on the second spring. When the moving plate compresses the second spring to a certain position, the limit plate no longer limits the limit column, and the limit column will move out of the limit groove and move upward under the action of the first spring rebound. While the limit column moves upward, it will drive the air diversion component to move upward through the guide column. When the air diversion component When the positioning block on the clamping assembly is moved out of the positioning groove on the clamping assembly, the first air diverter plate and the second air diverter plate on the air diverter assembly will be expanded and form a certain angle under the action of the elastic sheet rebounding. After the first air diverter plate and the second air diverter plate continue to move upward to a certain horizontal height, the end wall of one end of the first air diverter plate and the second air diverter plate fits with the front end wall of the VOCS monitor. At this time, the first air diverter plate and the second air diverter plate will divert the air entering the air inlet end of the VOCS monitor, reducing the air volume entering the air inlet end of the VOCS monitor. Therefore, the present invention can automatically reduce the air intake volume entering the VOCS monitor under an external strong wind environment, avoiding the situation where the air intake volume entering the VOCS monitor under an external strong wind environment is too large, resulting in a decrease in the VOCS detection accuracy in the air.

[0018] 2. In the present invention, through the coordinated arrangement of the first air diverter plate, the second air diverter plate and other structures, when the end wall of one end of the first air diverter plate and the second air diverter plate fits with the front end wall of the VOCS monitor, the cooperation of the first air diverter plate and the second air diverter plate also reduces the wind force received by the VOCS monitor, thereby avoiding the poor stability of the VOCS monitor caused by the external strong wind environment.

[0019] 3. In the present invention, through the provision of the buffer and shock-absorbing sleeve, when the limit column moves upward, the buffer and shock-absorbing sleeve on the circumferential outer wall of the limit column will first contact the top end of the shell. When the buffer and shock-absorbing sleeve contacts the top end of the shell and generates a certain force, the buffer and shock-absorbing sleeve can play a role of buffering and shock absorption, thereby avoiding the first spring being in a compressed rebound state for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the first working state of the air diversion mechanism of the present invention.

[0023] Figure 3 It is a structural schematic diagram of the second working state of the air diversion mechanism of the present invention.

[0024] Figure 4 The cross-sectional structure diagram of the connection structure between the rebound component and the limit component of the present invention is shown in FIG. Figure 1 .

[0025] Figure 5 The cross-sectional structure diagram of the connection structure between the rebound component and the limit component of the present invention is shown in FIG. Figure 2 .

[0026] Figure 6 The present invention Figure 4 Schematic diagram of the structure with the shell removed Figure 1 .

[0027] Figure 7 The present invention Figure 4 Schematic diagram of the structure with the shell removed Figure 2 .

[0028] Figure 8 It is a structural schematic diagram of the movable plate of the present invention.

[0029] Fig. 9 It is a cross-sectional view of the housing of the present invention.

[0030] Fig.10 It is a structural schematic diagram of the air diversion component of the present invention.

[0031] Fig.11 The present invention Fig.10 Schematic diagram of the local enlarged structure at A in the figure.

[0032] In the figure:

[0033] 100, air diversion mechanism; 110, rebound assembly; 120, limit assembly; 130, mounting block; 140, air diversion assembly;

[0034] 111, first spring; 112, guide column; 113, limit column; 114, buffer shock absorbing sleeve;

[0035] 121, first connecting column; 122, air spoiler; 123, moving plate; 1231, connecting rod; 1232, slider; 1233, limiting groove; 124, housing; 1241, slide rail; 125, second spring; 126, limiting plate; 127, second connecting column;

[0036] 141, L-shaped connecting plate; 142, first air splitter plate; 1421, first groove; 1422, ventilation hole; 1423, first connecting block; 143, first movable rod; 144, elastic sheet; 145, second movable rod; 146, second air splitter plate; 1461, second groove; 1462, second connecting block; 147, positioning block;

[0037] 200, VOCS monitor;

[0038] 300. Clamping assembly. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] like Figure 1-11 As shown, a portable air exhaust monitoring device includes an air diversion mechanism 100, a VOCS monitor 200 and a clamping assembly 300. The top of the clamping assembly 300 is equipped with a VOCS monitor 200 for detecting VOCS in the air. The front end of the VOCS monitor 200 is provided with an air diversion mechanism 100 that automatically reduces the air intake amount entering the air intake end of the VOCS monitor 200 under a certain external wind force. With the arrangement of the clamping assembly 300, the staff can fix the device to the roof crossbar of the car through the clamping assembly 300, so that the device is installed on the roof and performs VOCS detection on the air in a walking manner;

[0043] The air diversion mechanism 100 is provided with an air diversion component 140 which automatically pops up and unfolds to divert air to the air inlet end of the VOCS monitor 200 under the action of a certain external wind force, and a rebound component 110 which automatically drives the air diversion component 140 to pop up in a certain direction under the action of a certain external wind force. The air diversion mechanism 100 is provided with a limit component 120 which automatically releases the limit on the rebound component 110 under the action of a certain external wind force.

[0044] A shell 124 is provided on the limiting assembly 120, and the shell 124 is installed on the top of the mounting block 130, and the mounting block 130 is arranged at the front end of the clamping assembly 300. A movable plate 123 is arranged inside the shell 124, and a limiting groove 1233 is provided on the outer wall of the movable plate 123. The first connecting column 121 and the second connecting column 127 are respectively installed at the center position of the front end wall and the rear end wall of the movable plate 123.

[0045] The other end of the first connecting column 121 passes through the front end wall of the shell 124 and extends to the outside to be connected with the air spoiler 122. Due to the setting of the air spoiler 122, a certain force will be generated between the air spoiler 122 and the flowing air during the driving of the vehicle. After being subjected to a certain force, the air spoiler 122 will transmit the force to the movable plate 123 through the first connecting column 121. The other end of the second connecting column 127 passes through the rear end wall of the shell 124 and extends to the outside to be connected with the limiting plate 126. The setting of the limiting plate 126 mainly limits the movement of the second connecting column 127. A second spring 125 is sleeved on the outer side of the outer wall of the second connecting column 127, and the second spring 125 is located between the rear end wall of the movable plate 123 and the inner rear end wall of the shell 124.

[0046] The upper and lower parts of the outer wall on one side of the movable plate 123 are connected to the slider 1232 through a connecting rod 1231. The other end of the slider 1232 is installed on the slide rail 1241, and the slider 1232 and the slide rail 1241 are slidably connected. The slide rail 1241 is installed on the upper and lower parts of the inner wall on one side of the shell 124. The coordinated setting of the slider 1232 and the slide rail 1241 can play a role of limiting and guiding the movement of the movable plate 123, thereby enhancing the stability of the movable plate 123 when moving.

[0047] The air diversion assembly 140 is provided with an L-shaped connecting plate 141, and an elastic sheet 144 is installed on one side of the outer wall of the L-shaped connecting plate 141. The first air diversion plate 142 and the second air diversion plate 146 are installed on both sides of the outer wall of one side of the elastic sheet 144. The setting of the elastic sheet 144 can make the first air diversion plate 142 and the second air diversion plate 146 expand and form a certain angle under the action of the elastic force of the elastic sheet 144. The elastic sheet 144, the first air diversion plate 142 and the second air diversion plate 146 form a V shape, which can adjust the flow of air. For diversion, ventilation holes 1422 are provided on the surfaces of the first air diverter plate 142 and the second air diverter plate 146. When the first air diverter plate 142 and the second air diverter plate 146 reduce the air volume at the air inlet end of the VOCS monitor 200, external air can enter the air inlet end of the VOCS monitor 200 through the ventilation holes 1422. First grooves 1421 are provided above and below the surface of the first air diverter plate 142, and second grooves 1461 are provided above and below the surface of the second air diverter plate 146.

[0048] A first connecting block 1423 is provided in the first groove 1421, and a second connecting block 1462 is provided in the second groove 1461. The first connecting block 1423 is movably connected to the first movable rod 143 through a movable pin, the other end of the first movable rod 143 is movably connected to the second movable rod 145 through a movable pin, and the other end of the second movable rod 145 is movably connected to the second connecting block 1462 through a movable pin. With the cooperation of the first groove 1421, the second groove 1461, the first movable rod 143, the second movable rod 145, the first connecting block 1423, the second connecting block 1462 and other structures, the expanded angle between the first air diverter plate 142 and the second air diverter plate 146 can be limited.

[0049] A positioning block 147 is installed at the bottom end of the first air diverter plate 142 and the second air diverter plate 146. The other end of the positioning block 147 is set in a positioning groove, and the positioning groove is opened at the top of the clamping assembly 300. The coordinated setting of the positioning block 147 and the positioning groove can play a limiting role between the first air diverter plate 142 and the second air diverter plate 146 in the combined state.

[0050] The rebound assembly 110 is composed of a first spring 111, a guide column 112, a limit column 113 and a buffer shock-absorbing sleeve 114. The limit column 113 is arranged on the circumferential outer wall at the bottom end of the guide column 112, and the other end of the limit column 113 is arranged in the limit groove 1233. The buffer shock-absorbing sleeve 114 is arranged on the circumferential outer wall of the limit column 113. Through the arrangement of the buffer shock-absorbing sleeve 114, when the limit column 113 moves upward, the buffer shock-absorbing sleeve 114 on the circumferential outer wall of the limit column 113 will first contact with the inner wall of the shell 124. When the buffer and shock-absorbing sleeve 114 contacts the top of the shell 124 and generates a certain force, the buffer and shock-absorbing sleeve 114 can play a role of buffering and shock absorption, avoiding the first spring 111 from being in a compressed rebound state for a long time. The top of the guide column 112 passes through the top of the shell 124 and extends to the outside of the shell 124 and is connected to the L-shaped connecting plate 141. The first spring 111 is sleeved on the outer side of the outer wall of the guide column 112, and the first spring 111 is located between the shell 124 and the L-shaped connecting plate 141.

[0051] Working principle: When the device is installed on the roof and performs VOCS detection on the air in a walking manner, the VOCS monitor 200 can normally detect VOCS in the air in an environment with no wind or relatively small external wind. When the device is in an environment with strong external wind due to changes in the external environment during the detection process, the external wind will cause a certain force on the air spoiler 122. The force on the air spoiler 122 will be transmitted to the moving plate 123 through the first connecting column 121. After being subjected to a certain force, the moving plate 123 will cause a certain compression on the second spring 125. When the movable plate 123 compresses the second spring 125 to a certain position, the limiting plate 126 no longer limits the limiting column 113, and the limiting column 113 moves out of the limiting groove 1233 and moves upward under the action of the first spring 111 rebounding. When the limiting column 113 moves upward, it will drive the air diversion component 140 to move upward through the guide column 112. When the positioning block 147 on the air diversion component 140 moves out of the positioning groove on the clamping component 300, the first air diversion plate 142 and the second air diversion plate 146 on the air diversion component 140 will make the first air diversion plate 142 and the second air diversion plate 146 on the air diversion component 140 rebound under the action of the elastic sheet 144. The first air splitter plate 142 and the second air splitter plate 146 are unfolded and form a certain angle. After the first air splitter plate 142 and the second air splitter plate 146 continue to move upward to a certain horizontal height, the end wall of one end of the first air splitter plate 142 and the second air splitter plate 146 fits with the front end wall of the VOCS monitor 200. At this time, the first air splitter plate 142 and the second air splitter plate 146 will split the air entering the air inlet end of the VOCS monitor 200, reducing the air volume entering the air inlet end of the VOCS monitor 200, so that the present invention can automatically reduce the wind speed in the external strong wind environment. The amount of air entering the VOCS monitor 200 avoids the situation in which the VOCS detection accuracy in the air is reduced due to the excessive amount of air entering the VOCS monitor 200 in an external strong wind environment. When the end wall of one end of the first air diverter plate 142 and the second air diverter plate 146 fits with the front end wall of the VOCS monitor 200, the cooperation of the first air diverter plate 142 and the second air diverter plate 146 also reduces the wind force received by the VOCS monitor 200, thereby avoiding the situation in which the VOCS monitor 200 has poor stability in an external strong wind environment.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A portable air exhaust monitoring device, comprising an air diversion mechanism (100), a VOCS monitor (200) and a clamping assembly (300), characterized in that: A VOCS monitor (200) for detecting VOCS in the air is installed at the top of the clamping assembly (300), and an air diversion mechanism (100) is provided at the front end of the VOCS monitor (200) for automatically reducing the amount of air entering the air inlet end of the VOCS monitor (200) under the action of a certain external wind force; The air diversion mechanism (100) is provided with an air diversion component (140) which automatically pops up and unfolds to divert air to the air inlet end of the VOCS monitor (200) under the action of a certain external wind force, and a rebound component (110) which automatically drives the air diversion component (140) to pop up in a certain direction under the action of a certain external wind force. The air diversion mechanism (100) is provided with a limit component (120) which automatically releases the limit of the rebound component (110) under the action of a certain external wind force.

2. The portable air exhaust monitoring device according to claim 1, characterized in that: The limiting assembly (120) is provided with a shell (124), the shell (124) is mounted on the top of a mounting block (130), and the mounting block (130) is arranged at the front end of the clamping assembly (300), a movable plate (123) is arranged inside the shell (124), a limiting groove (1233) is provided on the outer wall of the movable plate (123), and a first connecting column (121) and a second connecting column (127) are respectively installed at the center positions of the front end wall and the rear end wall of the movable plate (123).

3. The portable air exhaust monitoring device according to claim 2, characterized in that: The other end of the first connecting column (121) passes through the front end wall of the shell (124) and extends to the outside to be connected to the air spoiler (122); the other end of the second connecting column (127) passes through the rear end wall of the shell (124) and extends to the outside to be connected to the limit plate (126); a second spring (125) is sleeved on the outer side of the outer wall of the second connecting column (127), and the second spring (125) is located between the rear end wall of the movable plate (123) and the inner rear end wall of the shell (124).

4. The portable air exhaust monitoring device according to claim 3, characterized in that: The upper and lower parts of the outer wall on one side of the movable plate (123) are connected to the slider (1232) via a connecting rod (1231); the other end of the slider (1232) is mounted on a slide rail (1241); and the slider (1232) and the slide rail (1241) are slidably connected; the slide rail (1241) is mounted on the upper and lower parts of the inner wall on one side of the housing (124).

5. The portable air exhaust monitoring device according to claim 1, characterized in that: The air diversion assembly (140) is provided with an L-shaped connecting plate (141), an elastic sheet (144) is installed on one side outer wall of the L-shaped connecting plate (141), a first air diversion plate (142) and a second air diversion plate (146) are respectively installed on both sides of the one side outer wall of the elastic sheet (144), the surfaces of the first air diversion plate (142) and the second air diversion plate (146) are both provided with ventilation holes (1422), the first air diversion plate (142) is provided with a first groove (1421) above and below the surface, and the second air diversion plate (146) is provided with a second groove (1461) above and below the surface.

6. The portable air exhaust monitoring device according to claim 5, characterized in that: A first connecting block (1423) is arranged in the first groove (1421), and a second connecting block (1462) is arranged in the second groove (1461); the first connecting block (1423) is movably connected to the first movable rod (143) via a movable pin; the other end of the first movable rod (143) is movably connected to the second movable rod (145) via a movable pin; and the other end of the second movable rod (145) is movably connected to the second connecting block (1462) via a movable pin.

7. The portable air exhaust monitoring device according to claim 6, characterized in that: A positioning block (147) is installed at the bottom end of each of the first air splitter plate (142) and the second air splitter plate (146), and the other end of the positioning block (147) is arranged in a positioning groove, and the positioning groove is opened at the top of the clamping assembly (300).

8. The portable air exhaust monitoring device according to claim 1, characterized in that: The rebound component (110) is composed of a first spring (111), a guide column (112), a limit column (113) and a buffer shock-absorbing sleeve (114); a limit column (113) is arranged on the circumferential outer wall at the bottom end of the guide column (112), and the other end of the limit column (113) is arranged in a limit groove (1233); a buffer shock-absorbing sleeve (114) is arranged on the circumferential outer wall of the limit column (113); the top end of the guide column (112) passes through the top end of the shell (124) and extends to the outside of the shell (124) to be connected to the L-shaped connecting plate (141); the outer side of the outer wall of the guide column (112) is sleeved with the first spring (111), and the first spring (111) is located between the shell (124) and the L-shaped connecting plate (141).

Images