A lift-type large-range safety cage for a tank truck

Abstract

The present invention discloses a lift-type large-range safety protection cage for a tank truck, belonging to the technical field of safety equipment, including a boarding platform. The boarding platform includes a fixed slide, platform a, support columns, and guardrail a. The fixed slide is connected to platform a. Support columns are provided at the lower part of platform a, and guardrail a is provided around platform a. A movable boarding ladder is also provided on platform a. A support frame is provided on guardrail a, and a controller is provided on the support frame. It is characterized in that a lifting mechanism and a safety protection cage are further provided. The safety protection cage is installed on the lifting mechanism. A sliding connector is provided below the movable boarding ladder, and a chute is provided on the sliding connector. The chute is movably connected to the safety protection cage. It solves the technical problems of low automation degree and poor protection effect of existing equipment, and is mainly applied to aspects such as opening the cover of the tank truck, overhauling, and maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of safety equipment, in particular to a lifting large-range safety cage for a tank truck. Background Art

[0002] Liquid petroleum products and liquid chemical raw materials are widely transported inland by tank trucks. The filling process involves loading and unloading of materials, and personnel are required to climb onto the roof of the truck to open the tank mouth for loading and unloading operations. In addition, frequently used tanks must be regularly inspected and maintained, and personnel are also required to climb onto the roof of the truck.

[0003] Depending on the type of tank, the roof is generally between 3 meters and 4.2 meters from the ground. Since the tank body of a tank truck is often arc-shaped, the area on the roof available for standing and walking is relatively small, and there are often unevenness and obstacles. In rainy and snowy weather, water or snow will accumulate on the roof. These unfavorable factors pose a great threat to the personal safety of roof workers, especially when boarding the vehicle without proper protection, it is more likely to cause falls or even high-altitude falls.

[0004] At present, there are generally two ways for personnel to board the vehicle:

[0005] One method is to climb up to the roof from the ground using the fixed ladder on the tank truck. There is no protection during the climbing process, which poses a great safety hazard.

[0006] The other method is to board the tank truck from the side of the top through the boarding platform, which requires manual pushing and pulling of the boarding ladder to form a boarding passage between the platform and the roof.

[0007] After climbing onto the roof using the above two methods, you can walk in a small area on the roof with a safety sling. However, since there is no guardrail on the roof, even with a safety sling, there is still a possibility of tripping or slipping when walking, which greatly reduces the sense of security of the operators. In addition, the safety sling has a certain buffer stroke. When a person falls under the vehicle, the sling will stretch a certain distance before it becomes straight and taut. At this time, although the person has not fallen to the ground, he may be on the side of the vehicle. The inertial force of the fall will react to the human body through the sling to cause injury, and it will also force the person to hit the tank, causing secondary injury. Summary of the invention

[0008] In order to solve the technical problems raised in the background technology, the present invention provides a lifting large-range safety cage for a tank truck, and the technical solution adopted is as follows:

[0009] A lift-type large-range safety cage for a tank truck, including a boarding platform for operators to board the vehicle. The boarding platform includes a fixed slide, platform a, support columns, and guardrail a. The fixed slide is connected to platform a. The fixed slide is prior art and will not be elaborated by the applicant here. Support columns are provided under platform a to support platform a. Guardrail a is provided around platform a to protect boarding personnel. A movable boarding ladder is also provided on platform a. A support frame is provided on guardrail a, and a controller is provided on the support frame to control the operation of the entire device. The controller is prior art and will not be elaborated by the applicant here.

[0010] The key point of the present invention is that a lifting mechanism and a safety cage are also provided. The safety cage is installed on the lifting mechanism to protect the safety of boarding personnel. A sliding connector is provided under the movable boarding ladder, and a chute is provided on the sliding connector. The chute is movably connected to the safety cage, so as to ensure that the movable boarding ladder can rise and fall with the rise and fall of the safety cage, facilitating the use of boarding personnel.

[0011] The lifting mechanism is one of the core components of the present invention. The lifting mechanism is composed of symmetric lifting components. The lifting component includes a bottom plate and a column. The column is installed on the bottom plate. An upper fixing plate and a lower fixing plate are provided on the column. A driving motor a is installed on the upper fixing plate. The driving motor a is connected to a speed reducer a. A sprocket a is provided on the output shaft of the speed reducer a. A sprocket support a is provided on the lower fixing plate. The sprocket support a is movably connected to a sprocket b through a rotating shaft. A chain a is connected between sprocket a and sprocket b. A vertical guide rail is provided between the upper fixing plate and the lower fixing plate. A sliding connector is provided on the vertical guide rail. The sliding connector includes a cage fixing bracket. An upper slider and a lower slider are provided on the cage fixing bracket. Chutes are provided on both the upper slider and the lower slider. The shape of the cage fixing bracket is an L-shaped structure. A transmission link connecting head a is provided on the upper slider. The transmission link connecting head a is connected to chain a. Limit switches a and b are respectively provided on the upper fixing plate and the lower fixing plate. The vertical guide rail is sleeved on the chutes of the upper slider and the lower slider. The driving motor a drives the rotation of chain a to drive the up and down movement of the sliding connector, and the up and down movement of the sliding connector drives the up and down movement of the safety cage.

[0012] The safety cage is one of the core components of the present invention. The safety cage includes a long bottom plate and guardrails. The guardrails are installed on the long bottom plate with a rectangular opening left in the middle. The rectangular opening is for people to move on. An opening is provided in the middle of the long bottom plate, and the opening is used to connect with a movable boarding ladder. Support columns are provided on both sides of the long bottom plate. A chord tension fixing section is provided at the upper part of the support column. A steel cable is provided between the chord tension fixing sections. A group of anti-falling sliding members are provided on the steel cable. A pull rope is provided at the lower part of the anti-falling sliding member. A hanging ring is provided at the lower part of the pull rope.

[0013] The movable boarding ladder is also one of the important components of the present invention, including a mounting plate, vertical rods and a baffle. The mounting plate is installed on platform a. Vertical rods and connecting members are provided on the mounting plate. A rotating shaft is provided above the vertical rod. The rotating shaft is movably connected with a handrail. The handrail is connected with a bent rod through the rotating shaft. The bent rod is connected with a fixing plate. A group of footrests are provided on the baffle. The fixing plate is connected with the footrests. The baffle is movably connected with the connecting member through the rotating shaft. A sliding connecting member is provided below the baffle. A sliding groove is provided on the sliding connecting member.

[0014] Preferably: In order to better protect the safety of the boarding person, guide rails are respectively provided on the guardrails on both sides of the opening, namely an upper guide rail and a lower guide rail. A movable guardrail is installed on the guide rails. The movable guardrail includes a guardrail frame. A pulley a is provided at the lower part of the guardrail frame. A sliding assembly is provided on the side of the guardrail frame. The sliding assembly includes an upper slider and a lower slider. The upper slider and the lower slider are connected into a whole through a fixing member. A transmission connecting head b is also provided on the sliding assembly. Driving motors b and limit switches d are respectively fixedly installed at both ends of the guardrail. A sprocket c is provided on the output shaft of the driving motor b. Sprocket brackets b and limit switches c are provided on the guardrails on both sides of the opening. The sprocket bracket b is movably connected with a sprocket d through a rotating shaft. A chain b is provided between the sprocket c and the sprocket d. The chain b is fixedly connected with the transmission connecting head b. The upper slider and the lower slider are respectively engaged with the upper guide rail and the lower guide rail and slide left and right. The pulley a fits on the long bottom plate and slides left and right. A fixed shaft is provided at the lower part of the opening. A pulley b is provided on the fixed shaft. The pulley b is engaged with the sliding groove and slides, so as to ensure that the lifting of the whole safety cage drives the movable boarding ladder to move up and down simultaneously and synchronously.

[0015] Preferably: In order to ensure the safe operation of the equipment, anti-collision blocks a and anti-collision blocks b are respectively provided on the upper fixing plate and the lower fixing plate.

[0016] Preferably: In order to expand the boarding area, a rotating shaft is also provided on the guardrail. The rotating shaft is in contact with and movably connected with one side of the movable guardrail. A group of telescopic cylinders are provided on the guardrail. The lower part of the telescopic cylinder is connected with the movable guardrail. The expansion and contraction of the telescopic cylinder drive the flipping of the movable guardrail.

[0017] Preferably: in order to ensure the safe operation of the equipment, a group of buffers are provided below the long bottom plate. The buffers include a guide cylinder, a buffer pad is provided inside the guide cylinder, a group of grooves are provided on the buffer pad, and a group of elastic components are provided inside the grooves. The elastic components are springs, and a limit switch d is also provided in the middle of the buffer pad.

[0018] Compared with the prior art, the beneficial effects of the present invention are: through the transformation of the present invention, the entire equipment has a high degree of automation, is electrically driven, does not require manual pushing and pulling of the boarding ladder, and the entire boarding process is protected by guardrails or cages. Coupled with its own anti-falling device, it can achieve a dual anti-falling function, is safer, the cage area and the walking area are adjustable, the height of the safety cage can also be adjusted, and it can be suitable for tank trucks with different vehicle lengths and heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention;

[0020] Figure 2 A top view of the present invention;

[0021] Figure 3 is a side view of the present invention;

[0022] Figure 4 A perspective view of the present invention;

[0023] Figure 5 A three-dimensional diagram of the boarding platform of the present invention;

[0024] Figure 6 It is a front view of the boarding platform of the present invention;

[0025] Figure 7 A three-dimensional diagram of the movable boarding ladder of the present invention;

[0026] Figure 8 It is a front view of the movable boarding ladder of the present invention;

[0027] Figure 9 It is a structural diagram of the sliding connection of the present invention;

[0028] Figure 10 is a cross-sectional view of the present invention;

[0029] Figure 11 for Figure 10 A local enlarged view of point A;

[0030] Figure 12 The safety cage of the present invention is three-dimensional Figure 1 ;

[0031] Figure 13 for Figure 12Partial enlarged view at position B;

[0032] Figure 14 is Figure 12 Partial enlarged view at position C;

[0033] Figure 15 is Figure 12 Partial enlarged view at position D;

[0034] Figure 16 Structural diagram of the mobile guardrail of the present invention;

[0035] Figure 17 Three-dimensional Figure 2 ;

[0036] Figure 18 Three-dimensional view of the lifting column of the present invention;

[0037] Figure 19 Three-dimensional view of the sliding connector of the present invention;

[0038] Figure 20 Side view Figure 1 ;

[0039] Figure 21 Side view Figure 2 .

[0040] Figure 22 Structural diagram of the buffer of the present invention. Detailed implementation manners Embodiment 1

[0041] As Figure 1-22 shown:

[0042] A liftable large-range safety cage for a tank truck, comprising a boarding platform 1. The boarding platform 1 includes a fixed slide 1-2, a platform a 1-4, support columns 1-3 and a guardrail a 1-7. The fixed slide 1-2 is connected to the platform a 1-4. Support columns 1-3 are provided below the platform a 1-4. Guardrails a 1-7 are provided around the platform a 1-4. A movable boarding ladder 1-1 is further provided on the platform a 1-4. A support frame 1-6 is provided on the guardrail a 1-7, and a controller 1-5 is provided on the support frame 1-6.

[0043] The lifting mechanism 2 and the safety cage 3 are the core components of the present invention. The safety cage 3 is installed on the lifting mechanism 2. A sliding connector 1-1-1 is provided below the movable boarding ladder 1-1. A chute 1-1-5 is provided on the sliding connector 1-1-1. The chute 1-1-5 is movably connected to the safety cage 3.

[0044] The lifting mechanism 2 consists of symmetric lifting components. Each lifting component includes a bottom plate 2-1 and a column 2-2. The column 2-2 is installed on the bottom plate 2-1. An upper fixing plate 2-3-2 and a lower fixing plate 2-3 are provided on the column 2-2. A driving motor a 2-7 is installed on the upper fixing plate 2-3-2. The driving motor a 2-7 is connected to a speed reducer a 2-8. A sprocket a 2-6 is provided on the output shaft of the speed reducer a 2-8. A sprocket support a 2-3-1 is provided on the lower fixing plate 2-3. The sprocket support a 2-3-1 is movably connected to a sprocket b 2-4 through a rotating shaft. The sprocket a 2-6 and the sprocket b 2-4 are connected by a chain a 2-5. A vertical guide rail 2-11 is provided between the upper fixing plate 2-3-2 and the lower fixing plate 2-3. A sliding connector 2-10 is provided on the vertical guide rail 2-11. The sliding connector 2-10 includes a cage fixing bracket 2-10-1. An upper slider 2-10-4 and a lower slider 2-10-2 are provided on the cage fixing bracket 2-10-1. Chute 2-10-5 is provided on both the upper slider 2-10-4 and the lower slider 2-10-2. A transmission link connecting head a 2-10-3 is provided on the upper slider 2-10-4. The transmission link connecting head a 2-10-3 is connected to the chain a 2-5. A limit switch a 2-9 and a limit switch b 2-14 are respectively provided on the upper fixing plate 2-3-2 and the lower fixing plate 2-3. Anti-collision blocks a 2-12 and anti-collision blocks b 2-13 are respectively provided on the upper fixing plate 2-3-2 and the lower fixing plate 2-3.

[0045] The safety cage 3 includes a long bottom plate 3-2 and a guardrail 3-5. The guardrail 3-5 is installed on the long bottom plate 3-2 with a rectangular opening 3-1 left in the middle. An opening 3-19 is provided in the middle of the long bottom plate 3-2. Support columns 3-7 are provided on both sides of the long bottom plate 3-2. String tension fixing joints 3-7-1 are provided at the upper parts of the support columns 3-7. A steel cable 3-7-2 is provided between the string tension fixing joints 3-7-1. A set of anti-falling sliding members 3-13 is provided on the steel cable 3-7-2. A pull rope 3-14 is provided at the lower part of the anti-falling sliding member 3-13. A hanging ring 3-15 is provided at the lower part of the pull rope 3-14.

[0046] The movable boarding ladder 1-1 includes a mounting plate 1-1-7, a vertical rod 1-1-6, and a baffle 1-1-10. The mounting plate 1-1-7 is installed on the platform a1-4. The mounting plate 1-1-7 is provided with a vertical rod 1-1-6 and a connecting piece 1-1-8. Above the vertical rod 1-1-6, there is a rotating shaft, and the rotating shaft is movably connected to the handrail 1-1-2. The handrail is connected to the bent rod 1-1-4 through the rotating shaft. The bent rod 1-1-4 is connected to the fixing plate 1-1-3. The baffle 1-1-10 is provided with a group of footrests 1-1-9. The fixing plate 1-1-3 is connected to the footrest 1-1-9. The baffle 1-1-10 is movably connected to the connecting piece 1-1-8 through the rotating shaft. Below the baffle 1-1-10, there is a sliding connecting piece 1-1-1, and the sliding connecting piece 1-1-1 is provided with a chute 1-1-5.

[0047] On the guardrails on both sides of the opening 3-19, there are upper and lower installed guide rails, namely the upper guide rail 3-12 and the lower guide rail 3-20. A movable guardrail 4 is installed on the guide rails. The movable guardrail 4 includes a guardrail frame 4-1. The lower part of the guardrail frame 4-1 is provided with a pulley a4-3. The side of the guardrail frame 4-1 is provided with a sliding assembly. The sliding assembly includes an upper slider 4-5 and a lower slider 4-4. The upper slider 4-5 and the lower slider 4-4 are connected into a whole through a fixing piece. The sliding assembly is also provided with a transmission connection head b4-2. At both ends of the guardrail 3-5, a driving motor b3-8 and a limit switch d3-10 are respectively fixedly installed. On the output shaft of the driving motor b3-8, there is a sprocket c3-9. On the guardrails on both sides of the opening 3-19, there are a sprocket bracket b3-16 and a limit switch c3-18. The sprocket bracket b3-16 is movably connected to a sprocket d3-17 through a rotating shaft. Between the sprocket c3-9 and the sprocket d3-17, there is a chain b3-11. The chain b3-11 is fixedly connected to the transmission connection head b4-2. The upper slider 4-5 and the lower slider 4-4 are respectively engaged in the upper guide rail 3-12 and the lower guide rail 3-20 and slide left and right. The pulley a4-3 fits on the long bottom plate 3-2 and slides left and right. Below the opening 3-19, there is a fixed shaft 3-21. On the fixed shaft 3-21, there is a pulley b3-22. The pulley b3-22 is engaged in the chute 1-1-5 and slides.

[0048] On the guardrail 3-5, there is also a rotating shaft 7. The rotating shaft 7 is in contact with and movably connected to one side of the movable guardrail 3-4. On the guardrail 3-5, there is a group of telescopic cylinders 3-3. The lower part of the telescopic cylinder 3-3 is connected to the movable guardrail 3-4.

[0049] A set of buffers 5 are provided below the long bottom plate 3-2. The buffer 5 includes a guide cylinder 5-1. A buffer pad 5-2 is provided inside the guide cylinder 5-1. A set of grooves 5-2-1 are provided on the buffer pad 5-2. A set of elastic components 5-3 are provided inside the grooves 5-2-1. The elastic component 5-3 is a spring. A limit switch d5-4 is also provided in the middle of the buffer pad 5-2.

[0050] The working principle of the present invention is as follows: In the initial state, the safety cage 3 is reset at the upper limit position of the lifting column. The driving tanker is parked directly below the safety cage 3, so that the manhole cover on the top of the tank is located within the opening 2 area of the safety cage. The operator first climbs up to the boarding platform a1-4 through the fixed ladder 1-2, operates the controller 5, and controls the safety cage 3 to slowly descend. At the same time, the movable boarding ladder automatically follows the safety cage 3 and descends until the buffer plate 5 at the bottom of the safety cage 3 touches the top of the tanker, triggering the travel switch inside the buffer plate 5 to automatically stop the descent of the safety cage 3. When necessary, by controlling the flipping of the movable guardrail, the range of the rectangular opening 3-1 on the safety cage 3 can be adjusted. And according to the length of the tank, by controlling the position of the movable guardrail 4, the safety range of the standing area on the safety cage 3 can be adjusted. After the adjustment is completed, the operator then climbs onto the long bottom plate 3-2 through the movable boarding ladder, hangs the personal safety belt on the hanging ring 3-15 under the anti-fall sliding crane, and can walk safely on the top of the tanker to perform operations such as opening the cover, maintenance, and repair.

[0051] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lifting large-range safety cage for a tank truck, comprising an access platform (1). The access platform (1) includes a fixed slide (1-2), platform a (1-4), support columns (1-3) and guardrail a (1-7). The fixed slide (1-2) is connected to platform a (1-4). Support columns (1-3) are provided at the lower part of platform a (1-4). Guardrail a (1-7) is provided around platform a (1-4). A movable access ladder (1-1) is also provided on platform a (1-4). A support frame (1-6) is provided on guardrail a (1-7), and a controller (1-5) is provided on the support frame (1-6). An elevating mechanism (2) and a safety cage (3) are also provided. The safety cage (3) is installed on the elevating mechanism (2). A sliding connector (1-1-1) is provided below the movable access ladder (1-1). A chute (1-1-5) is provided on the sliding connector (1-1-1), and the chute (1-1-5) is movably connected to the safety cage (3). The safety cage (3) includes a long bottom plate (3-2) and guardrails (3-5). The guardrails (3-5) are installed on the long bottom plate (3-2) with a rectangular opening (3-1) left in the middle. An opening (3-19) is provided in the middle of the long bottom plate (3-2). Support columns (3-7) are provided on both sides of the long bottom plate (3-2). String-tightening fixing joints (3-7-1) are provided at the upper parts of the support columns (3-7). A steel cable (3-7-2) is provided between the string-tightening fixing joints (3-7-1). A group of anti-falling sliding members (3-13) are provided on the steel cable (3-7-2). A pull rope (3-14) is provided at the lower part of the anti-falling sliding member (3-13), and a hanging ring (3-15) is provided at the lower part of the pull rope (3-14). It is characterized in that: On the guardrails on both sides of the described opening (3-19), upper and lower installed guide rails are provided, namely the upper guide rail (3-12) and the lower guide rail (3-20). A movable guardrail (4) is installed on the guide rails. The movable guardrail (4) includes a guardrail frame (4-1). A pulley a (4-3) is provided at the lower part of the guardrail frame (4-1). A sliding assembly is provided on the side of the guardrail frame (4-1). The sliding assembly includes an upper slider (4-5) and a lower slider (4-4). The upper slider (4-5) and the lower slider (4-4) are connected into a whole through a fixing piece. A transmission connection head b (4-2) is also provided on the sliding assembly. At both ends of the guardrail (3-5), a driving motor b (3-8) and a limit switch d (3-10) are respectively fixedly installed. A sprocket c (3-9) is provided on the output shaft of the driving motor b (3-8). Sprocket brackets b (3-16) and limit switches c (3-18) are provided on the guardrails on both sides of the opening (3-19). The sprocket bracket b (3-16) is movably connected to a sprocket d (3-17) through a rotating shaft. A chain b (3-11) is provided between the sprocket c (3-9) and the sprocket d (3-17). The chain b (3-11) is fixedly connected to the transmission connection head b (4-2). The upper slider (4-5) and the lower slider (4-4) are respectively engaged with the upper guide rail (3-12) and the lower guide rail (3-20) and slide left and right. The pulley a (4-3) fits on the long bottom plate (3-2) and slides left and right. A fixed shaft (3-21) is provided at the lower part of the opening (3-19). A pulley b (3-22) is provided on the fixed shaft (3-21). The pulley b (3-22) is engaged in a chute (1-1-5) and slides.

2. The lift type large-range safety cage for a tank truck according to claim 1, characterized in that, The described lifting mechanism (2) consists of symmetrical lifting components. Each lifting component includes a bottom plate (2-1) and a vertical column (2-2). The vertical column (2-2) is installed on the bottom plate (2-1). An upper fixing plate (2-3-2) and a lower fixing plate (2-3) are provided on the vertical column (2-2). A driving motor a (2-7) is installed on the upper fixing plate (2-3-2). The driving motor a (2-7) is connected to a speed reducer a (2-8). A sprocket a (2-6) is provided on the output shaft of the speed reducer a (2-8). A sprocket bracket a (2-3-1) is provided on the lower fixing plate (2-3). The sprocket bracket a (2-3-1) is movably connected to a sprocket b (2-4) through a rotating shaft. The sprocket a (2-6) and the sprocket b (2-4) are connected by a chain a (2-5). A vertical guide rail (2-11) is provided between the upper fixing plate (2-3-2) and the lower fixing plate (2-3). A sliding connector (2-10) is provided on the vertical guide rail (2-11). The sliding connector (2-10) includes a cage fixing bracket (2-10-1). An upper slider (2-10-4) and a lower slider (2-10-2) are provided on the cage fixing bracket (2-10-1). Chutes (2-10-5) are provided on both the upper slider (2-10-4) and the lower slider (2-10-2). A transmission link connecting head a (2-10-3) is provided on the upper slider (2-10-4). The transmission link connecting head a (2-10-3) is connected to the chain a (2-5). Limit switches a (2-9) and limit switches b (2-14) are respectively provided on the upper fixing plate (2-3-2) and the lower fixing plate (2-3). The vertical guide rail (2-11) is sleeved on the chutes of the upper slider and the lower slider.

3. The lift-type large-range safety guard cage for a tank truck according to claim 1, wherein, The described movable boarding ladder (1-1) includes a mounting plate (1-1-7), a vertical rod (1-1-6), and a baffle (1-1-10). The mounting plate (1-1-7) is installed on the platform a (1-4). A vertical rod (1-1-6) and a connecting member (1-1-8) are provided on the mounting plate (1-1-7). A rotating shaft is provided above the vertical rod (1-1-6). The rotating shaft is movably connected to a handrail (1-1-2). The handrail is connected to a bent rod (1-1-4) through the rotating shaft. The bent rod (1-1-4) is connected to a fixing plate (1-1-3). A group of footrests (1-1-9) are provided on the baffle (1-1-10). The fixing plate (1-1-3) is connected to the footrests (1-1-9). The baffle (1-1-10) is movably connected to the connecting member (1-1-8) through a rotating shaft. A sliding connecting member (1-1-1) is provided below the baffle (1-1-10). A chute (1-1-5) is provided on the sliding connecting member (1-1-1).

4. A lifting large-range safety cage for a tank truck according to claim 2, characterized in that, Anti-collision blocks a (2-12) and anti-collision blocks b (2-13) are respectively provided on the upper fixing plate (2-3-2) and the lower fixing plate (2-3).

5. The lift-type large-range safety guard cage for a tank truck according to claim 1, characterized in that, The described guardrail (3-5) is also provided with a rotating shaft (7), and the rotating shaft (7) is in contact with and movably connected to one side of the movable guardrail (3-4). A set of telescopic cylinders (3-3) is provided on the guardrail (3-5), and the lower part of the telescopic cylinder (3-3) is connected to the movable guardrail (3-4).

6. The lift type large-range safety cage for a tank truck according to claim 1, characterized in that, A set of buffers (5) is provided below the described long bottom plate (3-2).

7. The liftable large-range safety guard cage for a tank truck according to claim 6, wherein The described buffer (5) includes a guide cylinder (5-1). A buffer pad (5-2) is arranged in the guide cylinder (5-1). A set of grooves (5-2-1) is provided on the buffer pad (5-2), and a set of elastic components (5-3) is arranged in the grooves (5-2-1).

8. A lift type large-range safety protection cage for a tank truck according to claim 7, characterized in that, The described elastic component (5-3) is a spring, and a limit switch d (5-4) is also arranged in the middle of the buffer pad (5-2).

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