A folding cat ladder with pneumatic tank top linkage guardrails

Abstract

The utility model discloses a folding cat ladder with pneumatic tank top linkage guardrail, including the storage tank body, the tail portion combination of storage tank body is installed cat ladder mechanism, the top of storage tank body is equipped with guardrail mechanism combination, the lower portion combination of cat ladder mechanism is equipped with the ladder rung mechanism, the side portion of ladder rung mechanism is through linkage mechanism and guardrail mechanism combination together. Advantageous effect lies in: the utility model discloses the mode of the turning ladder rung of ladder rung mechanism around the ladder rung fixed seat lower turning, can make the turning ladder rung lower turning to extend to spread to, thus facilitating personnel through the mode of the foot of ladder rung pedal and successfully climbs to the top of storage tank body through cat ladder mechanism, and through the mode of the turning ladder rung of ladder rung mechanism around the ladder rung fixed seat upper turning, can make the turning ladder rung upper turning to extend to store, thus facilitating after using the mode of the upper turning of ladder rung mechanism to prevent irrelevant personnel mistake to climb, also helps to ensure the safety of the exercise.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary components for semi-trailer tank trucks, specifically to a folding ladder with a pneumatic tank top linkage guardrail. Background Technology

[0002] A semi-trailer tanker truck is a tanker truck that connects to a trailer unit via a tractor unit. Compared to ordinary single-unit tanker trucks, semi-trailer tanker trucks can effectively improve transportation efficiency for oil transport. With the same tonnage, they reduce transportation costs and save fuel consumption.

[0003] In the design of existing semi-trailer tank trucks, the tank location requires personnel to periodically climb to the top of the tank for maintenance. Therefore, in order to ensure that personnel can climb to the top of the tank smoothly, a ladder is often added to the rear of the tank. At the same time, in order to ensure personnel safety, guardrails are often installed on both sides of the top of the tank.

[0004] However, in the existing technology, firstly, regarding the location of the ladder, the ladder at the rear of the tank is usually of fixed specifications and cannot be adjusted. This results in the bottom of the ladder being usually low, which not only affects safe operation but also makes it easy for unauthorized personnel to climb it, posing a safety hazard. As for the guardrail, although the guardrail is designed to be foldable for easy storage when not in use, it often requires personnel to climb to the top of the tank to operate the folding and unfolding of the guardrail, which still poses a significant safety hazard. Utility Model Content

[0005] The purpose of this utility model is to provide a folding ladder with a pneumatic tank top linkage guardrail in order to solve the above problems, as detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This utility model provides a folding ladder with a pneumatic tank top linkage guardrail, including a storage tank body. A climbing mechanism is assembled and installed at the tail of the storage tank body to facilitate climbing to the top of the storage tank body.

[0008] The top of the storage tank body is equipped with a guardrail mechanism that can be unfolded and folded, so as to protect personnel from falling when they are on the top of the storage tank body.

[0009] The lower part of the climbing mechanism is equipped with a step mechanism that has the functions of unfolding downwards and folding upwards, so that personnel can easily step on the step mechanism to climb to the top of the storage tank body by flipping it downwards.

[0010] The side of the step mechanism is combined with the guardrail mechanism through a linkage mechanism, so as to realize the linkage opening and closing of the step mechanism and the guardrail mechanism by means of the linkage mechanism;

[0011] A pneumatic mechanism is provided between the guardrail mechanism and the top of the storage tank body, so as to enable the ladder mechanism to open and close the guardrail mechanism with minimal effort.

[0012] Preferably, the upper part of the climbing mechanism is fixed to the top of the tail of the tank body via a climbing mechanism fixing seat, and the climbing mechanism extends downward at the tail of the tank body.

[0013] Preferably, the ladder mechanism has multiple layers of ladder steps spaced vertically, and a ladder handrail is provided at the top of the ladder mechanism where it connects to the tank body.

[0014] Preferably, the guardrail mechanism includes guardrail crossbars and guardrail uprights. There are two guardrail crossbars, which are suspended parallel to each other on the top two sides of the tank body in the width direction. Multiple hinge fixing seats are fixedly connected to both sides of the tank body in the width direction. Multiple guardrail uprights are connected between the guardrail crossbars and the hinge fixing seats. The upper and lower ends of the guardrail uprights are rotatably connected to the guardrail crossbars and the hinge fixing seats through upper hinge parts and lower hinge parts, respectively.

[0015] Preferably, the ladder mechanism includes a flip-up ladder and a ladder fixing seat. The ladder fixing seats are fixedly connected in pairs on both sides of the ladder mechanism, and the ends of the longitudinal beams on both sides of the flip-up ladder are rotatably connected to the ladder fixing seats through pin connections, so that the flip-up ladder can flip up and down around the ladder fixing seats.

[0016] Preferably, the linkage mechanism includes a linkage rod and a connecting arm. A guardrail fixing seat is fixedly connected to the other side of the flip-up step. The linkage rod is rotatably connected to the guardrail fixing seat and the connecting arm through a rotating connecting part. At the same time, the connecting arm is combined with the guardrail upright through the connecting seat. This allows the guardrail upright to flip from an inclined folded state to a vertically unfolded state or return from a vertically unfolded state to an inclined folded state by moving the linkage mechanism composed of the linkage rod and the connecting arm through the flip-up step.

[0017] Preferably, the treadmill mounting base on one side of the flip-up step is provided with a chain pin and a locking pin hole, which is used to lock the flip-up step in its flipped-up state by inserting the chain pin into the locking pin hole when the flip-up step is flipped up to extend and be stored upwards.

[0018] Preferably, the pin connection parts are all assemblies with cotter pins added to the ends of the pins, and the rotating connection parts are all assemblies with cotter pins added to the ends of the pins.

[0019] Preferably, the distance between each set of ladder fixing seats is not less than 40mm.

[0020] Preferably, the pneumatic mechanism comprises a cylinder body placed obliquely between two adjacent guardrail posts on one side. The lower end of the cylinder body is fixedly connected to the top of the storage tank body via a hinged mounting seat, and the cylinder body is rotatably connected to the hinged mounting seat. A reciprocating push rod is coaxially arranged on the upper part of the cylinder body, and the outer end of the push rod is rotatably connected to the adjacent guardrail post via a hinged connecting seat. This allows the step mechanism to effortlessly flip and open / close the guardrail mechanism by extending and retracting the push rod during the opening and closing of the guardrail mechanism using the linkage mechanism.

[0021] In practical application, the aforementioned folding ladder with a pneumatic tank top linkage guardrail features a step mechanism at its lower part. This mechanism has both downward unfolding and upward folding functions. The flip-up step and the step fixing seat are rotatably connected via a pin connection. The flip-up step can be extended downwards by folding around the step fixing seat, allowing personnel to easily climb to the top of the tank body by stepping on the step. Conversely, the flip-up step can be extended upwards by folding around the step fixing seat. The extended storage design allows for easy folding of the tread mechanism after use to prevent unauthorized climbing and ensure safety. The tread mechanism features a chain pin and a locking pin hole on one side of the tread fixing base. When the tread is folded up for extended storage, inserting the chain pin into the locking pin hole supports the lower part of the tread, locking it in the folded-up state. Pulling the chain pin out of the locking pin hole releases the support, unlocking the tread. The locking and unlocking methods for the flip-up ladder are simple and easy to operate. It facilitates locking the flip-up ladder in its upward-folded, stowed state, and also allows it to be easily unlocked and unfolded for use. The side of the ladder mechanism is connected to the guardrail mechanism via a linkage mechanism. The two ends of the linkage rod of the linkage mechanism are rotatably connected to the guardrail fixing seat and the connecting arm via rotating connecting parts. The connecting arm is connected to the guardrail upright of the guardrail mechanism via the connecting seat. The guardrail fixing seat is connected to the outside of the flip-up ladder. Therefore, during the process of the flip-up ladder unfolding downwards, the ladder drives the linkage rod and the connecting arm... The linkage mechanism formed by the connecting arm allows the guardrail posts of the guardrail mechanism to flip from an inclined, folded state to a vertically unfolded state. This enables the ladder mechanism to drive the guardrail mechanism to unfold during the downward unfolding process, achieving coordinated opening of the ladder mechanism and the guardrail mechanism. This facilitates the guardrail mechanism being already in the unfolded state when personnel climb to the top of the storage tank for inspection, eliminating the need for personnel to manually open the guardrail mechanism and removing the safety hazards of opening the guardrail mechanism from the top of the storage tank. Furthermore, during the upward unfolding and retraction of the flipping ladder, the linkage mechanism consisting of the flipping ladder and the connecting arm moves accordingly.This device enables the guardrail uprights of the guardrail mechanism to flip from a vertically unfolded state to a tilted, folded state. This allows the ladder mechanism to fold and retract during the unfolding process, achieving synchronized folding of the ladder and guardrail mechanisms. This facilitates simultaneous operation after use, returning both mechanisms to their folded state without requiring manual folding, reducing workload and eliminating the safety hazard of folding the guardrail mechanism on top of the tank. Furthermore, multiple guardrail uprights are connected to the guardrail crossbar and hinge fixing base, with the upper and lower ends of each upright fixed to the crossbar and hinge respectively via the upper and lower hinge portions. The guardrail is connected to a fixed seat and rotates around the upper and lower hinge seats, respectively. This allows the guardrail to be adjusted to an upright position or a tilted / folded position. The opening and closing of the guardrail mechanism is simple and easy to implement, facilitating its installation on top of the tank. Furthermore, the inclusion of a pneumatic mechanism allows the step mechanism to easily open and close the guardrail by extending and retracting the push rod. This facilitates effortless operation of the step mechanism and guardrail from below, avoiding excessive resistance that would require significant force to operate.

[0022] The beneficial effects are as follows: 1. The present invention has a ladder mechanism with downward unfolding and upward folding functions assembled at the lower part of the ladder mechanism. At the same time, the flip-up ladder of the ladder mechanism and the ladder fixing seat are rotatably connected together by the pin connection part. Then, by flipping down the ladder mechanism around the ladder fixing seat, the flip-up ladder can be flipped down to extend downward, so that people can easily climb to the top of the tank body by stepping on the ladder steps. At the same time, by flipping up the ladder mechanism around the ladder fixing seat, the flip-up ladder can be flipped up to extend upward and be stored. This makes it easy to prevent unauthorized personnel from climbing after use by flipping up the ladder mechanism, and also helps to ensure the safety of use.

[0023] 2. The step mechanism has a chain pin and a locking pin hole on one side of the step fixing base assembly. When the flip step is flipped up to extend and be stored, the lower part of the flip step can be supported by inserting the chain pin into the locking pin hole, thereby locking the flip step in the flipped state. At the same time, the chain pin can be released by pulling it out of the locking pin hole, thereby unlocking the flip step in the flipped state. The locking and unlocking method of the flip step in the flipped state is simple and easy to operate. It is convenient to lock the flip step in the flipped state and also convenient to release the flip step in the flipped state to unfold and use.

[0024] 3. The side of the step ladder mechanism is combined with the guardrail mechanism through a linkage mechanism. At the same time, the two ends of the linkage linkage of the linkage mechanism are rotatably connected to the guardrail fixing seat and the connecting arm through the rotating connection part, and the connecting arm is combined with the guardrail upright of the guardrail mechanism through the connecting seat. The guardrail fixing seat is connected to the outside of the flip-up step ladder. Then, in the process of the flip-up step ladder flipping down and extending downward, the linkage mechanism composed of the linkage linkage and the connecting arm is moved by the flip-up step ladder, which can make the guardrail upright of the guardrail mechanism flip from the inclined folded state to the vertical unfolded state. This realizes the function of the step ladder mechanism driving the guardrail mechanism to unfold during the downward unfolding process. It realizes the linkage opening of the step ladder mechanism and the guardrail mechanism, which makes it convenient for personnel to climb to the top of the storage tank body for inspection and maintenance. The guardrail mechanism is already in the unfolded state, without the need for personnel to open the guardrail mechanism separately, and eliminates the safety hazards of opening the guardrail mechanism on the top of the storage tank body.

[0025] 4. During the process of the flip-up ladder flipping up and extending upwards for storage, the linkage mechanism consisting of the flip-up ladder driving the linkage rod and connecting arm can rotate the guardrail uprights from the vertically unfolded state to the tilted folded state. This realizes the function of the ladder mechanism driving the guardrail mechanism to fold and store during the upward unfolding process. It realizes the linkage folding of the ladder mechanism and the guardrail mechanism, which makes it easy to operate the ladder mechanism and the guardrail mechanism to return to the folded storage state simultaneously after use. There is no need for personnel to fold the guardrail mechanism and the ladder mechanism separately, which reduces the workload of personnel and eliminates the safety hazards of folding the guardrail mechanism on the top of the storage tank body.

[0026] 5. The guardrail mechanism has multiple guardrail uprights connected to the guardrail crossbar and the hinge fixing seat. The upper and lower ends of the guardrail uprights are rotatably connected to the guardrail crossbar and the hinge fixing seat through the upper and lower hinge parts, respectively. By rotating the upper and lower ends of the guardrail uprights around the upper and lower hinge seats, the guardrail uprights can be adjusted to a vertical use state and a tilted folded state. The opening and folding storage of the guardrail mechanism is simple and easy to realize, making it convenient to install the guardrail mechanism on the top of the tank body.

[0027] 6. The guardrail mechanism is equipped with a pneumatic mechanism, which enables the step mechanism to open and close the guardrail mechanism with the help of the linkage mechanism. The extension and retraction of the push rod of the pneumatic mechanism allows the step mechanism to flip and open and close the guardrail mechanism with less effort. This makes it easier for personnel to operate the step mechanism and guardrail mechanism from below, avoiding excessive linkage resistance that would require a lot of force to complete the operation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is an overall schematic diagram of the linkage between the guardrail mechanism and the step mechanism of this utility model for opening;

[0030] Figure 2 This is an overall schematic diagram of the linkage between the guardrail mechanism and the ladder mechanism for closing in this utility model;

[0031] Figure 3 This is a front view schematic diagram of the ladder climbing mechanism and the stepping mechanism of this utility model;

[0032] Figure 4 This is a left-side view of the climbing ladder mechanism and the stepping ladder mechanism of this utility model;

[0033] Figure 5 This is a utility model Figure 3 Enlarged view of a portion at point A;

[0034] Figure 6 This is a utility model Figure 4 A magnified view of section B.

[0035] The annotations in the attached figures are explained as follows:

[0036] 1. Guardrail Mechanism; 101. Guardrail Horizontal Bar; 102. Upper Hinge; 103. Guardrail Vertical Bar; 104. Lower Hinge; 105. Hinge Fixing Seat; 2. Linkage Mechanism; 201. Connecting Seat; 202. Connecting Arm; 203. Linkage Link; 204. Rotating Connecting Part; 205. Guardrail Fixing Seat; 3. Climbing Ladder Mechanism; 301. Climbing Ladder Step; 302. Climbing Ladder Handrail; 303. Climbing Ladder Fixing Seat; 4. Step Mechanism; 401. Tilting Step; 402. Pin Connecting Part; 403. Step Fixing Seat; 404. Locking Pin Hole; 405. Chain Pin; 5. Tank Body; 6. Pneumatic Mechanism; 601. Hinge Mounting Seat; 602. Cylinder Body; 603. Push Rod; 604. Hinge Connecting Seat. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] See Figures 1-6 As shown, this utility model provides a folding ladder with a pneumatic tank top linkage guardrail, including a storage tank body 5. A climbing mechanism 3 is assembled and installed at the rear of the storage tank body 5 to facilitate climbing to the top of the storage tank body 5. A guardrail mechanism 1 that can be unfolded and folded is assembled and installed at the top of the storage tank body 5 to protect personnel from falling when on the top of the storage tank body 5. Specifically, the guardrail mechanism 1 includes guardrail crossbars 101 and guardrail uprights 103. There are two guardrail crossbars 101, which are suspended parallel to each other on both sides of the top of the storage tank body 5 in the width direction. Multiple hinge fixing seats 105 are fixedly connected to both sides of the storage tank body 5 in the width direction. Multiple guardrail posts 103 are connected to the hinge fixing seats 105, and the upper and lower ends of the guardrail posts 103 are rotatably connected to the guardrail crossbar 101 and the hinge fixing seats 105 through the upper hinge part 102 and the lower hinge part 104, respectively. The purpose of this arrangement is that by rotating the upper and lower ends of the guardrail posts 103 around the upper and lower hinge seats, the guardrail posts 103 can be adjusted to a vertical use state and a tilted folded state. The opening and folding storage of the guardrail mechanism 1 is simple and easy to realize.

[0039] See Figures 1-6As shown, the lower part of the climbing mechanism 3 is equipped with a step mechanism 4 that has the functions of flipping down and unfolding, and flipping up and folding. This is to facilitate personnel to step on the step mechanism 4 and climb to the top of the storage tank body 5 smoothly via the climbing mechanism 3. Specifically, the step mechanism 4 includes a flip-up step 401 and a step fixing seat 403. The step fixing seats 403 are fixedly connected in pairs on both sides of the climbing mechanism 3. The ends of the longitudinal beams on both sides of the flip-up step 401 are rotatably connected to the step fixing seats 403 through pin connecting parts 402, so that the flip-up step 401 can be flipped up and down around the step fixing seats 403. The purpose of this arrangement is that by flipping down the step mechanism 4 around the step fixing seats 403, the flip-up step 401 can be flipped down to extend downwards and unfolded. At the same time, by flipping up the step mechanism 4 around the step fixing seats 403, the flip-up step 401 can be flipped up to extend upwards and be stored.

[0040] See Figures 1-6 As shown, the side of the step mechanism 4 is combined with the guardrail mechanism 1 through the linkage mechanism 2. The linkage mechanism 2 is used to achieve the linkage opening and closing of the step mechanism 4 and the guardrail mechanism 1. Specifically, the linkage mechanism 2 includes a linkage rod 203 and a connecting arm 202. A guardrail fixing seat 205 is fixedly connected to the other side of the flip step 401. The linkage rod 203 is rotatably connected to the guardrail fixing seat 205 and the connecting arm 202 through a rotating connecting part 204. Simultaneously, the connecting arm 202 is combined with the guardrail upright 103 through the connecting seat 201. This allows the guardrail upright 103 to flip from an inclined folded state to a vertically unfolded state or return from a vertically unfolded state to an inclined folded state by moving the linkage mechanism composed of the linkage rod 203 and the connecting arm 202 through the flip step 401. This design is because when the flip step 401 flips down... During the downward extension process, the linkage mechanism consisting of the flipping step 401 driving the linkage link 203 and connecting arm 202 can rotate the guardrail upright 103 of the guardrail mechanism 1 from an inclined folded state to a vertically unfolded state. This realizes the function of the step mechanism 4 driving the guardrail mechanism 1 to unfold during the downward extension process, and realizes the linkage opening of the step mechanism 4 and the guardrail mechanism 1. At the same time, during the upward extension and storage process of the flipping step 401, the linkage mechanism consisting of the flipping step 401 driving the linkage link 203 and connecting arm 202 can rotate the guardrail upright 103 of the guardrail mechanism 1 from a vertically unfolded state to an inclined folded state. This realizes the function of the step mechanism 4 driving the guardrail mechanism 1 to fold and store during the upward extension process, and realizes the linkage folding of the step mechanism 4 and the guardrail mechanism 1.

[0041] See Figures 1-6As shown, a pneumatic mechanism 6 is combined between the guardrail mechanism 1 and the top of the tank body 5. This pneumatic mechanism 6 is used to allow the step mechanism 4 to easily flip and open / close the guardrail mechanism 1. Specifically, the pneumatic mechanism 6 consists of a cylinder body 602 positioned diagonally between two adjacent guardrail posts 103 on one side. The lower end of the cylinder body 602 is fixedly connected to the top of the tank body 5 via a hinged mounting base 601, and the cylinder body 602 is rotatably connected to the hinged mounting base 601. A reciprocating push rod 603 is coaxially mounted on the upper part of the cylinder body 602, and the outer end of the push rod 603 is connected to a hinged connecting seat 604201. The adjacent guardrail posts 103 are rotatably connected so that during the opening and closing of the guardrail mechanism 1 by means of the linkage mechanism 2, the step mechanism 4 can easily flip the guardrail mechanism 1 by means of the extension and retraction of the push rod 603. The advantage of this setting is that during the opening and closing of the guardrail mechanism 1 by means of the linkage mechanism 2, the step mechanism 4 can easily flip the guardrail mechanism 1 by means of the extension and retraction of the push rod 603 of the pneumatic mechanism 6. This makes it easier for personnel to complete the operation of the step mechanism 4 and the guardrail mechanism 1 at the bottom with less effort, and avoids the need to consume a lot of force to complete the operation due to excessive linkage resistance.

[0042] See Figures 1-6 As shown, the following optimizations have been made to this application: the upper part of the climbing mechanism 3 is fixedly connected to the top of the tail of the storage tank body 5 via a climbing ladder fixing seat 303, and the climbing mechanism 3 extends downward at the tail of the storage tank body 5 so that the climbing mechanism 3 can be firmly fixed at the tail of the storage tank body 5 to facilitate personnel climbing to the top of the storage tank body 5. Optionally, the climbing mechanism 3 is provided with multiple layers of climbing steps 301 at intervals in the vertical direction, and a climbing handrail 302 is provided at the position where the top of the climbing mechanism 3 connects with the storage tank body 5. This arrangement facilitates easy upward climbing by stepping on the climbing steps 301, and when personnel reach the top of the climbing mechanism 3, they can easily transition to the top of the storage tank body 5 by holding the climbing handrail 302.

[0043] See Figures 1-6As shown, the treadmill 401 has a chain pin 405 and a locking pin hole 404 assembled on one side of the treadmill fixing base 403. When the treadmill 401 is flipped up to extend and be stored upwards, the chain pin 405 is inserted into the locking pin hole 404 to lock the treadmill 401 in the flipped-up state. With this configuration, when the treadmill 401 is flipped up to extend and be stored upwards, the chain pin 405 can support the lower part of the treadmill 401, thereby locking the treadmill 401 in the flipped-up state. At the same time, simply pulling the chain pin 405 out of the locking pin hole 404 can release the chain pin 405 supporting the treadmill 401, thereby unlocking the treadmill 401 in the flipped-up state. The locking and unlocking method of the treadmill 401 in the flipped-up state is simple and easy to operate. Alternatively, all pin connection parts 402 are assemblies with cotter pins at the ends of the pins, and all rotating connection parts 204 are assemblies with cotter pins at the ends of the pins. This arrangement facilitates a stable rotating connection between the tilting ladder 401 and the ladder fixing seat 403 via the pin connection parts 402. It also facilitates a stable rotating connection between the connecting arm 202 and the linkage rod 203 via the rotating connection parts 204, and a stable rotating connection between the linkage rod 203 and the guardrail fixing seat 205 via the rotating connection parts 204. Furthermore, the distance between each set of ladder fixing seats 403 is no less than 40mm, ensuring sufficient space between the ladder fixing seats 403 to accommodate the outer diameter of the longitudinal beam of the tilting ladder 401, thus ensuring that the tilting ladder 401 can smoothly perform both upward and downward tilting operations.

[0044] With the above structure, in practical use, a step mechanism 4 with downward unfolding and upward folding functions is assembled at the lower part of the climbing mechanism 3. The flip-up step 401 of the step mechanism 4 is rotatably connected to the step fixing seat 403 via a pin connection part 402. By flipping the flip-up step 401 around the step fixing seat 403, the flip-up step 401 can be extended downwards, facilitating personnel to easily climb to the top of the storage tank body 5 via the climbing mechanism 3 by stepping on the step pedals. Simultaneously, by flipping the flip-up step 401 around the step fixing seat 403, the flip-up step 401 can be extended upwards for storage, facilitating storage after use. By flipping the step mechanism 4 upwards, unauthorized personnel are prevented from climbing, which also helps ensure safety. Since the step mechanism 4 has a step fixing base 403 on one side equipped with a chain pin 405 and a locking pin hole 404, when the flip step 401 is flipped upwards and extended for storage, inserting the chain pin 405 into the locking pin hole 404 allows the chain pin 405 to support the lower part of the flip step 401, thus locking the flip step 401 in its flipped state. Simultaneously, simply pulling the chain pin 405 out of the locking pin hole 404 releases the chain pin 405 supporting the flip step 401, thus unlocking the flip step 401 in its flipped state. The locking and unlocking methods are simple and easy to operate. It facilitates locking the flip-up step 401 in its upward-folded storage state and also allows it to be unfolded and used after the upward-folding lock is released. Since the side of the step mechanism 4 is combined with the guardrail mechanism 1 via the linkage mechanism 2, and both ends of the linkage rod 203 of the linkage mechanism 2 are rotatably connected to the guardrail fixing seat 205 and the connecting arm 202 via the rotating connecting part 204, and the connecting arm 202 is combined with the guardrail upright 103 of the guardrail mechanism 1 via the connecting seat 201, and the guardrail fixing seat 205 is connected to the outside of the flip-up step 401, during the process of the flip-up step 401 unfolding downwards, the flip-up step 401 drives the linkage rod 203. The linkage mechanism consisting of link 3 and connecting arm 202 allows the guardrail upright 103 of guardrail mechanism 1 to flip from an inclined folded state to a vertically unfolded state. This enables the ladder mechanism 4 to drive the guardrail mechanism 1 to unfold during the downward unfolding process, achieving the linkage opening of ladder mechanism 4 and guardrail mechanism 1. This facilitates the guardrail mechanism 1 being already in the unfolded state when personnel climb to the top of the storage tank body 5 for maintenance, eliminating the need for personnel to manually open guardrail mechanism 1 and removing the safety hazard of opening guardrail mechanism 1 on top of storage tank body 5. Furthermore, during the upward unfolding and retraction of the flip ladder 401, the linkage mechanism consisting of link 203 and connecting arm 202 is activated by the flip ladder 401.The guardrail mechanism 1 allows the guardrail uprights 103 to flip from a vertically unfolded state to a tilted, folded state. This enables the ladder mechanism 4 to fold and store the guardrail mechanism 1 during its unfolding process, achieving coordinated folding of the ladder mechanism 4 and the guardrail mechanism 1. This facilitates simultaneous operation after use, allowing both mechanisms to return to their folded state without requiring manual folding of the guardrail mechanism 1 and ladder mechanism 4, reducing workload and eliminating the safety hazard of folding the guardrail mechanism 1 on top of the tank body 5. Furthermore, multiple guardrail uprights 103 are connected between the guardrail crossbar 101 and the hinge fixing seat 105 of the guardrail mechanism 1, and the upper and lower ends of the guardrail uprights 103 are connected to the guardrail crossbar 101 and the hinge fixing seat 105 via the upper hinge part 102 and the lower hinge part 104, respectively. The chain fixing seat 105 is rotatably connected, and the guardrail upright 103 can be adjusted to an upright and tilted folded state by rotating around the upper and lower hinge seats at its upper and lower ends, respectively. The opening and folding of the guardrail mechanism 1 is simple and easy to implement, facilitating its installation on the top of the tank body 5. Furthermore, because the guardrail mechanism 1 is equipped with a pneumatic mechanism 6, the step mechanism 4, through the linkage mechanism 2, allows for effortless opening and closing of the guardrail mechanism 1 by extending and retracting the push rod 603 of the pneumatic mechanism 6. This facilitates easy operation of the step mechanism 4 and guardrail mechanism 1 from below, avoiding excessive resistance that would require significant force to complete the operation.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A folding ladder with a pneumatic tank top linkage guardrail, comprising a storage tank body (5), characterized in that: The rear end of the storage tank body (5) is equipped with a climbing mechanism (3) to facilitate climbing to the top of the storage tank body (5). The top of the storage tank body (5) is provided with a guardrail mechanism (1) that can be unfolded and folded, so as to protect personnel from falling when they are on the top of the storage tank body (5). The lower part of the climbing mechanism (3) is provided with a step mechanism (4) with the functions of flipping down and unfolding and flipping up, so that people can easily step on the step mechanism (4) to climb to the top of the tank body (5) smoothly through the climbing mechanism (3). The side of the step mechanism (4) is combined with the guardrail mechanism (1) through the linkage mechanism (2) so as to realize the linkage opening and closing of the step mechanism (4) and the guardrail mechanism (1) by means of the linkage mechanism (2); A pneumatic mechanism (6) is provided between the guardrail mechanism (1) and the top of the tank body (5) to enable the step mechanism (4) to open and close the guardrail mechanism (1) with minimal effort.

2. The folding ladder with a pneumatic tank top linkage guardrail according to claim 1, characterized in that: The upper part of the climbing mechanism (3) is fixed to the top of the tail of the tank body (5) by the climbing fixing seat (303), and the climbing mechanism (3) extends downward at the tail of the tank body (5).

3. A folding ladder with a pneumatic tank top linkage guardrail according to claim 2, characterized in that: The climbing mechanism (3) has multiple layers of climbing steps (301) arranged vertically at intervals, and a climbing handrail (302) is arranged at the position where the top of the climbing mechanism (3) is connected to the tank body (5).

4. A folding ladder with a pneumatic tank top linkage guardrail as described in claim 1, 2, or 3, characterized in that: The guardrail mechanism (1) includes guardrail crossbars (101) and guardrail uprights (103). There are two guardrail crossbars (101) and they are suspended parallel to each other on the top two sides of the tank body (5) in the width direction. Multiple hinge fixing seats (105) are fixedly connected to both sides of the tank body (5) in the width direction. Multiple guardrail uprights (103) are connected between the guardrail crossbars (101) and the hinge fixing seats (105). The upper and lower ends of the guardrail uprights (103) are rotatably connected to the guardrail crossbars (101) and the hinge fixing seats (105) through the upper hinge part (102) and the lower hinge part (104), respectively.

5. A folding ladder with a pneumatic tank top linkage guardrail according to claim 4, characterized in that: The ladder mechanism (4) includes a flip-up ladder (401) and a ladder fixing seat (403). Both sides of the ladder mechanism (3) are fixedly connected to the ladder fixing seats (403) in pairs. The ends of the longitudinal beams on both sides of the flip-up ladder (401) are rotatably connected to the ladder fixing seats (403) through pin shaft connecting parts (402) so that the flip-up ladder (401) can flip up and down around the ladder fixing seats (403).

6. A folding ladder with a pneumatic tank top linkage guardrail according to claim 5, characterized in that: The linkage mechanism (2) includes a linkage link (203) and a connecting arm (202). A guardrail fixing seat (205) is fixedly connected to the other side of the flip-up step (401). The linkage link (203) is rotatably connected to the guardrail fixing seat (205) and the connecting arm (202) through a rotating connecting part (204). At the same time, the connecting arm (202) is combined with the guardrail upright (103) through the connecting seat (201). The guardrail upright (103) is flipped from the tilted folded state to the vertical unfolded state or returned to the tilted folded state by the movement of the linkage mechanism formed by the linkage link (203) and the connecting arm (202) through the flip-up step (401).

7. A folding ladder with a pneumatic tank top linkage guardrail according to claim 6, characterized in that: The flip-up step (401) has a chain pin (405) and a locking pin hole (404) on one side of the step fixing base (403). When the flip-up step (401) is flipped up to extend upwards and stored, the chain pin (405) is inserted into the locking pin hole (404) to lock the flip-up step (401) in the flipped-up state.

8. A folding ladder with a pneumatic tank top linkage guardrail according to claim 6, characterized in that: The pin connection part (402) is an assembly with a cotter pin added to the end of the pin, and the rotating connection part (204) is an assembly with a cotter pin added to the end of the pin.

9. A folding ladder with a pneumatic tank top linkage guardrail according to claim 6, characterized in that: The distance between each set of ladder fixing seats (403) shall not be less than 40mm.

10. A folding ladder with a pneumatic tank top linkage guardrail according to any one of claims 6-9, characterized in that: Specifically, the pneumatic mechanism (6) has a cylinder body (602) placed obliquely between two adjacent guardrail posts (103) on one side. The lower end of the cylinder body (602) is fixedly connected to the top of the storage tank body (5) through a hinge mounting seat (601), and the cylinder body (602) is rotatably connected to the hinge mounting seat (601). A push rod (603) capable of reciprocating extension is coaxially arranged on the upper part of the cylinder body (602), and the outer end of the push rod (603) is rotatably connected to the adjacent guardrail post (103) through a hinge connecting seat (604). This allows the step mechanism (4) to open and close the guardrail mechanism (1) with effortless flipping by extending and retracting the push rod (603) during the process of the step mechanism (4) opening and closing the guardrail mechanism (1) with the help of the linkage mechanism (2).

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