A gas pollutant detection device

Abstract

The present application relates to the field of environmental gas detection, especially to a kind of gas pollutant detection equipment, including outer cylinder and sealing mechanism, sealing mechanism is arranged in outer cylinder, sealing mechanism includes sealing inner plate, connecting ring, sealing inner plate is attached to the inner wall of outer cylinder corresponding to air groove is arranged, connecting ring array is fixedly connected and arranged on sealing inner plate, the inner wall of outer cylinder upper and lower end is symmetrically fixedly installed with sliding groove, the upper and lower ends of sealing inner plate are all slid in sliding groove, the end plate is threadedly connected on the upper and lower end of outer cylinder, detection mechanism is arranged on the end plate of upper end, the device can have specific certain waterproof function by this design, so as to detect the gas in mountain cave after passing through waterway, avoid water flow to enter and affect gas detection accuracy, gas detector is arranged below air outlet, so that detection is more convenient, also more efficient, reduce the interference of gas in outer cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of environmental gas detection, and particularly relates to a gas pollutant detection device. BACKGROUND

[0002] Cave exploration is an extremely adventurous sport, the challenges faced vary depending on the cave being visited, in addition to the complete lack of light at the entrance, the terrain, the squeeze, the flood can also be very difficult, cave diving is a unique and more dangerous sub-profession conducted by a few skilled cave explorers, virgin cave systems include the last few unexplored areas on earth, to enter a new cave, usually need to dig or dive, and the air in the virgin cave system is crucial to the personnel who dive or dig into it, long closed caves contain a large amount of harmful pollutant gases in the air, such as ammonia, which is usually formed after a large amount of bat feces is fermented, and when personnel enter, the gas in the cave needs to be detected, the conventional portable gas detector, the air inlet is used as a channel for exchanging with external gas, and the waterproof measure is relatively simple, in the long time of diving at a certain depth, water vapor is easy to enter through the gap or air inlet, at the same time, the gas detector cannot remove the attached water vapor for a short time after diving into the cave, so that the attached water vapor of the air inlet interferes with the gas detection data, and the present application provides a gas pollutant detection device. SUMMARY

[0003] The purpose of the present application is to solve the problem of the conventional portable gas detector, the air inlet waterproof measure is relatively simple, and the water vapor intrusion easily causes interference with the gas detection data, and a gas pollutant detection device is provided.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] A gas pollutant detection device is designed, which comprises an outer cylinder and a sealing mechanism, the sealing mechanism is arranged in the outer cylinder, the sealing mechanism comprises a sealing inner plate and a connecting ring, the sealing inner plate is arranged on the inner wall of the outer cylinder corresponding to the air inlet, the connecting ring is fixedly connected and arranged on the sealing inner plate in an array, the inner wall of the upper and lower ends of the outer cylinder is symmetrically fixedly installed with a sliding groove, the upper and lower ends of the sealing inner plate are slidably arranged in the sliding groove, and the upper and lower ends of the outer cylinder are threadedly connected with end plates, and the end plate on the upper end is provided with a detection mechanism.

[0006] Preferably, the detection mechanism comprises a gas detector, the upper surface of the end plate on the upper end is provided with an air outlet, the gas detector is fixedly installed below the net frame at the bottom of the air outlet, and the outer side of the outer cylinder is provided with a semi-submersible mechanism.

[0007] Preferably, a top cover is fixedly installed above the end plate of the upper end and corresponds to the air outlet, an air exhaust cavity is formed in the top cover, an extension rod is fixedly installed above the net rack, a sealing plug is fixedly installed at the extension rod, and the closed inner plate can seal the air passage.

[0008] Preferably, the rotating drum is coaxially and rotatably installed in the closed inner plate, connecting plates are circumferentially installed on the outer circumferential wall of the rotating drum, the outer ends of the connecting plates are fixedly connected with one side of the closed inner plate, and an inner groove is formed between the connecting plates on the rotating drum.

[0009] Preferably, end rings are fixedly installed on the upper and lower ends of the rotating drum, and sealing rings are fixedly installed on the inner sides of the end plates of the upper and lower ends and correspond to the end rings.

[0010] Preferably, a driving motor is circumferentially fixedly installed on the end plate of the lower end, a gear is fixedly installed on the output shaft of the driving motor, and an external gear ring is fixedly sleeved on the outer circumferential wall of the end ring of the lower end.

[0011] Preferably, the gas collecting mechanism is arranged in the rotating drum, the gas collecting mechanism comprises an inner cylinder, a wind collecting plate and a base, the inner cylinder is coaxially and rotatably installed in the rotating drum, air passage net grooves are circumferentially formed on the outer circumferential wall of the inner cylinder, the wind collecting plate is circumferentially fixedly installed on the outer circumferential wall of the inner cylinder, the base is fixedly installed at the lower end of the inner cylinder, a first motor is fixedly installed on the inner side of the end plate of the lower end, the output shaft of the first motor is fixedly connected with the base, and a wind collecting hopper is fixedly installed at the upper end of the inner cylinder.

[0012] Preferably, the semi-submersible mechanism comprises a floating ring, and the floating ring is slidably sleeved on the outer side of the outer cylinder.

[0013] Preferably, mounting seats are circumferentially fixedly installed on the outer circumferential wall of the lower end of the outer cylinder, a top frame is fixedly installed above the end plate of the upper end and corresponds to the mounting seats, a slide rod is vertically fixedly installed between the mounting seats and the top frame, and the slide rod slidably penetrates the floating ring.

[0014] Preferably, a second motor is fixedly installed on the bottom surface of the end plate of the lower end, a rope winding disc is fixedly installed on the output shaft of the second motor, a traction rope is fixedly connected with the mounting seat and corresponds to the rope winding disc, and the traction rope is fixedly connected with the floating ring and penetrates the mounting seat.

[0015] The gas pollutant detection equipment has the beneficial effects that:

[0016] 1. By setting the outer cylinder, detection mechanism, closed mechanism, on the one hand, the device can be in a certain waterproof function, in order to pass through the water channel after the gas in the cave of the mountain is detected, to avoid the water flow into the gas detection accuracy, on the other hand, through the detection mechanism, the gas detector is set below the exhaust port, so that the detection is more convenient, also more efficient, reduce the internal gas interference of the outer cylinder.

[0017] 2. By setting the gas collecting mechanism, the outside air can be collected by rotating the inner cylinder and the air collecting plate, effectively accelerating the gas entering the outer cylinder outside, and gathering through the exhaust port, increasing the air exchange rate inside the outer cylinder, increasing the air volume in contact with the gas detector within a certain time, facilitating the rapid and accurate detection of the gas pollutant condition, so as to judge whether it is beneficial to enter the personnel breathing in time.

[0018] 3. By setting the semi-submersible mechanism, the device can be converted between submersible state and floating state, which is convenient for the device to dive through the sealed water channel when traveling, avoids the water channel rock wall touching the outer cylinder, causing overturning, and can also make the device float on the water surface in the cave to expose the gas detection, and can control the floating height, increase the air contact range, and avoid the water flow through the air slot. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The front view structure diagram of the gas pollutant detection equipment is provided.

[0020] Figure 2 The lower view structure diagram of the gas pollutant detection equipment is provided.

[0021] Figure 3 The cross-sectional structure diagram of the gas pollutant detection equipment is provided.

[0022] Figure 4 The cross-sectional structure diagram of the gas pollutant detection equipment is provided.

[0023] Figure 5 The partial mechanism structure diagram of the gas pollutant detection equipment is provided.

[0024] Figure 6 The gas collecting mechanism structure diagram of the gas pollutant detection equipment is provided.

[0025] Figure 7 The detection mechanism structure diagram of the gas pollutant detection equipment is provided.

[0026] Figure 8 The A part structure enlargement diagram of the gas pollutant detection equipment is provided.

[0027] In the figure: outer cylinder 1, end plate 11, air outlet 111, air vent 12, air collection mechanism 2, inner cylinder 21, air vent net groove 22, air collection plate 23, bottom frame 24, air collection bucket 25, first motor 26, detection mechanism 3, gas detector 31, telescopic rod 32, sealing plug 33, top cover 34, air exhaust cavity 35, sealing mechanism 4, sealing inner plate 41, connecting ring 42, rotating drum 43, connecting plate 44, inner groove 45, end ring 46, sealing ring 47, outer tooth ring 48, gear 49, semi-submersible mechanism 5, mounting seat 51, top frame 52, sliding rod 53, floating ring 54, traction rope 55, second motor 56, rope collection reel 57. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0029] Embodiment 1

[0030] Reference Figure 3 , 5 , 7-8, a gas pollutant detection device, comprising an outer cylinder 1 and a sealing mechanism 4, the sealing mechanism 4 is arranged in the outer cylinder 1, the sealing mechanism 4 comprises a sealing inner plate 41 and a connecting ring 42, the outer cylinder 1 is provided with air vents 12 in the circumferential array of the outer circular wall, the sealing inner plate 41 is arranged on the inner circular wall of the outer cylinder 1 corresponding to the air vents 12, the connecting ring 42 is fixedly connected in the array and arranged on the sealing inner plate 41, the inner circular wall of the upper and lower ends of the outer cylinder 1 is symmetrically fixedly installed with a sliding groove, the upper and lower ends of the sealing inner plate 41 are slidably arranged in the sliding groove, and the sealing inner plate 41 is limited, a stop block is fixedly installed on one side of the inner wall of each air vent 12, which is used for limiting the sealing inner plate 41, when the sealing inner plate 41 completely blocks the air vent 12, the stop block prevents the sealing inner plate 41 from continuing to rotate, the upper and lower ends of the outer cylinder 1 are threadedly connected with end plates 11, the rotating drum 43 is coaxially rotatably installed in the sealing inner plate 41, the connecting plates 44 are circumferentially arranged on the outer circular wall of the rotating drum 43, the outer ends of the connecting plates 44 are fixedly connected with one side of the sealing inner plate 41, the inner grooves 45 are arranged between the connecting plates 44 on the rotating drum 43, the air holes are arranged in the array in the inner grooves 45, the end rings 46 are fixedly installed on the upper and lower ends of the rotating drum 43, the sealing rings 47 are fixedly installed on the inner sides of the end plates 11 corresponding to the end rings 46, the end rings 46 are sealingly rotatably connected with the sealing rings 47, the camera is arranged on the upper end plate 11, which is convenient for observing the conditions in the waterway and the cave.

[0031] The lower end of the end plate 11 is provided with a circumferential array of driving motors, which are servo motors. The driving motors, the first motor 26 and the second motor 56 are all waterproof motors. The output shaft of the driving motor is fixedly provided with a gear 49. The outer circular wall of the lower end of the end ring 46 is fixedly provided with an outer gear ring 48. The outer gear ring 48 is in meshing transmission with the gear 49. When sampling at a designated location, the driving motor is controlled to rotate synchronously. The outer gear ring 48 drives the rotation of the drum 43 through meshing transmission with the gear 49. At this time, the connecting plate 44 drives the rotation of the closed inner plate 41 and the connecting ring 42, so that the air holes on the inner recess 45 and the air passage 12 are exposed, so that external gas enters. When the device is about to be immersed in water or the gas detection is completed, the driving motor is controlled to rotate in reverse. The rotation of the closed inner plate 41 gradually blocks the air passage 12. In this process, the connecting plate 44 is gradually wound and attached to the drum 43, thereby blocking the air holes on the inner recess 45, realizing the sealing and waterproof of the device. At this time, the closed inner plate 41 closes the air passage 12, and the connecting plate 44 blocks the air holes on the inner recess 45, realizing double sealing and blocking, strengthening the waterproof sealing effect, avoiding water vapor entering, and also storing a certain amount of cave gas in the closed drum 43, facilitating subsequent more professional and detailed detection.

[0032] The upper end of the end plate 11 is provided with a detection mechanism 3. The detection mechanism 3 includes a gas detector 31. The upper end of the end plate 11 is provided with an air outlet 111. A net rack is fixedly installed at the bottom of the air outlet 111. The gas detector 31 is fixedly installed below the net rack at the bottom of the air outlet 111. A top cover 34 is fixedly installed above the air outlet 111 at the upper end of the end plate 11. The top cover 34 is provided with an air exhaust chamber 35. A telescopic rod 32 is fixedly installed above the net rack. The telescopic rod 32 is an electric push rod. A sealing plug 33 is fixedly installed at the telescopic end of the telescopic rod 32. The sealing plug 33 can seal and block the air exhaust chamber 35. The closed inner plate 41 can seal and block the air passage 12. The gas entering the device is discharged through the air outlet 111 and passes through the gas detector 31, which can detect harmful components and pollutants in the gas in real time. After the device is immersed in water and the detection is completed, the water needs to be blocked to prevent water from entering the air outlet 111. The telescopic rod 32 is controlled to extend, driving the sealing plug 33 to block the air exhaust chamber 35, thereby achieving sealing.

[0033] By setting the outer cylinder 1, the detection mechanism 3, the sealing mechanism 4, on the one hand, the sealing inner plate 41 seals the air passage groove 12, and the connecting plate 44 blocks the air holes on the inner recess groove 45, realizing double sealing and blocking, strengthening the waterproof sealing effect, avoiding water vapor from entering, so that the device can have a certain waterproof function, so as to block the air inlet when diving through the water channel, avoid water flow into the gas detector 31, and affect the gas detection accuracy, on the other hand, through the detection mechanism 3, the gas detector 31 is arranged below the air outlet 111, the gas entering from the air passage groove 12 and the air holes on the inner recess groove 45 is concentratedly contacted with the gas detector 31 before being discharged, so that the detection is more convenient and efficient, and the gas interference in the outer cylinder 1 is reduced.

[0034] Embodiment 2

[0035] According to embodiment 1, embodiment 1 makes the device have a certain waterproof function, so as to detect the gas in the mountain cave after passing through the water channel, avoid water flow from entering and affect the gas detection accuracy, through the detection mechanism 3, the gas detector 31 is arranged below the air outlet 111, so that the detection is more convenient and efficient, and the gas interference in the outer cylinder 1 is reduced, however, the external gas enters the outer cylinder 1 at a slow rate, that is, the air circulation is poor, which greatly affects the gas detection efficiency, referring to Figure 3 、 5 -6, as another preferred embodiment of the present application, based on embodiment 1, further comprising a gas collecting mechanism 2.

[0036] The gas collecting mechanism 2 is arranged in the rotating drum 43, the gas collecting mechanism 2 comprises an inner cylinder 21, a wind collecting plate 23, and a bottom frame 24, the inner cylinder 21 is coaxially and rotatably installed in the rotating drum 43, the air passage net grooves 22 are arrayed on the outer circular wall of the inner cylinder 21, the wind collecting plate 23 is circumferentially and fixedly installed on the outer circular wall of the inner cylinder 21, the bottom frame 24 is fixedly installed at the lower end of the inner cylinder 21, the first motor 26 is fixedly installed on the inner side of the end plate 11 at the lower end, the output shaft of the first motor 26 is fixedly connected with the bottom frame 24, the wind collecting hopper 25 is fixedly installed on the upper end of the inner cylinder 21, the wind collecting hopper 25 is used for gathering gas, the wind collecting hopper 25 is rotatably connected with the end plate 11 at the upper end, the first motor 26 drives the inner cylinder 21 to rotate, since the wind collecting plate 23 is arranged in an arc shape and is inclined, it can push the air to the inside of the inner cylinder 21, and then discharge the air through the air outlet 111.

[0037] By setting the air collecting mechanism 2, the outside air can be collected by rotating the inner cylinder 21 and the air collecting plate 23, effectively accelerating the air entering the outer cylinder 1 outside, and collecting and accelerating the exhaust port 111, increasing the air exchange rate inside the outer cylinder 1, increasing the air volume contacting the gas detector 31 within a certain time, facilitating rapid and accurate detection of gas pollutants, and timely determining whether it is beneficial to enter the respiratory system. The air collecting mechanism 2 cooperates with the sealing mechanism 4, which does not block the air holes on the air passage 12 and the inner groove 45, accelerates the outside air entering the air volume contacting the gas detector 31, thereby facilitating gas detection.

[0038] Example 3

[0039] According to example 2, example 2 makes the device have specific waterproof function, so as to detect the gas in the mountain cave after passing through the waterway, avoid the water flow into and affect the gas detection accuracy, through the detection mechanism 3, the gas detector 31 is arranged below the exhaust port 111, so that the detection is more convenient and efficient, reduces the gas interference in the inner cylinder 1, and can accelerate the internal air flow rate, improve the gas detection efficiency, however, the device in the water floating state cannot be controlled and adjusted, which leads to water flow entering during gas detection, refer to Figures 1-4 As another preferred embodiment of the present application, based on example 2, it further includes a semi-submersible mechanism 5 arranged outside the outer cylinder 1.

[0040] The semi-submersible mechanism 5 includes a floating ring 54 which is slidingly sleeved outside the outer cylinder 1, and the outer cylinder 1 is fixedly installed with an installation seat 51 on the outer wall array of the lower end, and the top frame 52 is fixedly installed above the end plate 11 on the upper end corresponding to the installation seat 51. The slide rod 53 is vertically fixedly installed between the installation seat 51 and the top frame 52, and the slide rod 53 slidingly penetrates the floating ring 54. The second motor 56 is fixedly installed on the bottom surface of the lower end plate 11, and the second motor 56 is fixedly installed on the output shaft of the second motor 56. The rope collecting disc 57 is fixedly connected with the traction rope 55 corresponding to the installation seat 51 on the rope collecting disc 57, and the traction rope 55 is fixedly connected with the floating ring 54 through the installation seat 51. When the device passes through the waterway, the second motor 56 is controlled to rotate to release the wound traction rope 55, so that the floating ring 54 is lifted to the upper end of the end plate 11 under the action of the buoyancy. When the gas detection is needed, the second motor 56 is controlled to reverse, and the rope collecting disc 57 winds the traction rope 55. At this time, the floating ring 54 is always floating on the water surface under the action of the buoyancy, so that the outer cylinder 1 is lifted, and when the floating ring 54 is located below the air passage 12, the sealing mechanism 4 is opened to make the gas enter.

[0041] By setting the semi-submersible mechanism 5, the device can be converted between the submerged state and the floating state, facilitating the device to dive through the sealed waterway, avoiding the waterway rock wall touching the outer cylinder 1, causing overturning, and at the same time enabling the device to float in the cave for gas detection, and being able to control the floating height, increase the air contact range, and at the same time avoid the water flow through the air slot 12.

[0042] Working principle: when the device is passing through the waterway, control the second motor 56 to rotate to release the winding traction rope 55, so that the float ring 54 rises above the end plate 11 under the action of buoyancy, when reaching the designated location for gas detection, control the second motor 56 to reverse, drive the winding reel 57 to wind the traction rope 55, at this time the float ring 54 is always floating on the water surface under the action of buoyancy, thereby making the outer cylinder 1 rise, when the float ring 54 is below the air slot 12, control the driving motor to rotate synchronously, through the meshing transmission of the outer gear ring 48 and the gear 49, drive the rotating drum 43 to rotate, at this time, through the connecting plate 44, drive the closed inner plate 41 and the connecting ring 42 to rotate, so that the air holes on the inner groove 45 and the air slot 12 are exposed, so that external gas enters, the first motor 26 drives the inner cylinder 21 to rotate, since the wind collecting plate 23 is arc-shaped, it can push the air into the inner cylinder 21, the gas entering the device is discharged through the air outlet 111, and the harmful components and pollutants in the gas can be detected in real time through the gas detector 31, when the device is about to enter the water or the gas detection is completed, control the driving motor to reverse, the rotating closed inner plate 41 gradually blocks the air slot 12, in this process, the connecting plate 44 is gradually wound and attached to the rotating drum 43, thereby blocking the air holes on the inner groove 45, realizing the sealing of the device to prevent water from entering, after the device is in water and the detection is completed, in order to avoid water entering from the air outlet 111, the sealing plug 33 needs to be blocked, control the telescopic rod 32 to extend, drive the sealing plug 33 to block the air outlet 35, realize sealing.

[0043] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A gas pollutant detection apparatus comprising an outer cylinder (1), characterised in that, Also include: The closing mechanism (4) is arranged in the outer cylinder (1), the closing mechanism (4) includes closing inner plate (41), connecting ring (42), the closing inner plate (41) is attached to the inner wall of the outer cylinder (1) corresponding to the ventilation groove (12), the connecting ring (42) is fixedly connected and arranged on the closing inner plate (41), the inner wall of the outer cylinder (1) is symmetrically fixedly installed with a sliding groove at the upper and lower ends, the closing inner plate (41) is slidably arranged in the sliding groove at the upper and lower ends, and the end plate (11) is threadedly connected to the upper and lower ends of the outer cylinder (1), and the detection mechanism (3) is arranged on the end plate (11) at the upper end; The outer side of the outer cylinder (1) is provided with a semi-submersible mechanism (5), the semi-submersible mechanism (5) includes a float ring (54), the float ring (54) is slidably sleeved on the outer side of the outer cylinder (1), the bottom surface of the end plate (11) at the lower end is fixedly installed with a second motor (56), the output shaft of the second motor (56) is fixedly installed with a rope collecting disc (57), the traction rope (55) is fixedly connected with the float ring (54) through the installation seat (51) and the rope collecting disc (57). By arranging the semi-submersible mechanism (5), the device can be converted between the submerged state and the floating state, which facilitates the device to pass through the sealed waterway when traveling, avoids the waterway rock wall from touching the outer cylinder (1) and causing overturning, and enables the device to float on the water surface in the cave and expose for gas detection.

2. A gas pollutant detection device according to claim 1, wherein The detection mechanism (3) includes a gas detector (31), and the upper surface of the end plate (11) at the upper end is provided with an air outlet (111), and the gas detector (31) is fixedly installed below the net frame at the bottom of the air outlet (111).

3. A gas pollutant detection device according to claim 2, wherein The top cover (34) is fixedly installed above the end plate (11) at the upper end and corresponds to the air outlet (111), the top cover (34) is provided with an air exhaust cavity (35) in the inside, the telescopic rod (32) is fixedly installed above the net frame, the sealing plug (33) is fixedly installed at the telescopic end of the telescopic rod (32), and the closing inner plate (41) can seal the ventilation groove (12).

4. A gas pollutant detection device according to claim 3, wherein The closing inner plate (41) is coaxially rotatably installed with a rotating drum (43), the connecting plate (44) is circumferentially installed on the outer wall of the rotating drum (43), the outer end of the connecting plate (44) is fixedly connected with one side of the closing inner plate (41), and the recess (45) is arranged between the connecting plates (44) on the rotating drum (43).

5. A gas pollutant detection device according to claim 4, wherein The end ring (46) is fixedly installed on the upper and lower ends of the rotating drum (43), and the sealing ring (47) is fixedly installed on the inner side of the end plate (11) at the upper and lower ends and corresponds to the end ring (46).

6. A gas pollutant detection device according to claim 5, wherein The driving motor is circumferentially fixedly installed on the end plate (11) at the lower end, the gear (49) is fixedly installed on the output shaft of the driving motor, and the outer gear ring (48) is fixedly sleeved on the outer wall of the end ring (46) at the lower end.

7. A gas pollutant detection device according to claim 4, wherein Also include gas collection mechanism (2), the gas collection mechanism (2) is arranged in the rotating drum (43), the gas collection mechanism (2) includes inner cylinder (21), wind collection plate (23), chassis (24), the inner cylinder (21) is coaxially rotatably installed in the rotating drum (43), the outer circular wall of the inner cylinder (21) is arrayed and provided with ventilation mesh groove (22), the wind collection plate (23) is circumferentially arrayed and fixedly installed on the outer circular wall of the inner cylinder (21), the chassis (24) is fixedly installed at the lower end of the inner cylinder (21), the first motor (26) is fixedly installed on the inner side of the end plate (11) at the lower end, the output shaft of the first motor (26) is fixedly connected with the chassis (24), and the wind collection hopper (25) is fixedly installed on the upper end of the inner cylinder (21).

8. The gas pollutant detection device of claim 1, wherein The outer circular wall of the lower end of the outer cylinder (1) is arrayed and fixedly installed with a mounting seat (51), the top frame (52) is fixedly installed above the end plate (11) at the upper end and corresponds to the mounting seat (51), the slide rod (53) is vertically and fixedly installed between the mounting seat (51) and the top frame (52), and the slide rod (53) is slidably penetrated through the floating ring (54).

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