A mobile pressure vessel ladder

Abstract

This utility model relates to the field of pressure vessel technology, specifically disclosing a mobile pressure vessel ladder, including a base with casters at the lower end and support studs on both sides. A support frame is located at the upper end of the base, with an inclined fixed ladder connected to one side of the support frame. A lifting platform is located above the support frame, with a vertical ladder connected to one end of the lifting platform. Lifting frames are connected to both sides of the vertical ladder, and the lifting frames slide against the support frame. The upper end of the lifting frames is connected to the bottom of the lifting platform, and the other end of the lifting platform is connected to a telescopic platform. In use, the telescopic platform rests on the maintenance platform on top of the pressure vessel. This utility model reduces the risk of equipment failure throughout its entire lifecycle, extends its safe service life, has extremely high utilization, and is convenient and flexible to use. Compared with existing technologies, this device reduces manufacturing and maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel technology, specifically a mobile pressure vessel ladder. Background Technology

[0002] A pressure vessel is a sealed container that withstands the pressure of a gaseous or liquid medium (not equal to atmospheric pressure) both internally and externally. A pressure vessel provides a closed space for physical or chemical processes that need to be performed under pressure, or for the safe storage of pressurized fluids.

[0003] Because horizontal pressure vessels have many joints or instruments installed at their upper ends, workers regularly climb to the maintenance platform at the top of the pressure vessel to perform maintenance work. Currently, the main approach is to weld a fixed ladder to one side of each pressure vessel, as disclosed in patent CN209012407U, which describes a storage tank pressure vessel with a fixed ladder installed on the side wall of the tank. However, the fixed ladder needs to be welded or bolted to the vessel wall, which leads to stress concentration in the vessel wall, accelerates fatigue cracks, and increases corrosion points. Regular maintenance is required, and installing a ladder on the side wall of each pressure vessel results in repetitive costs and increased maintenance costs. Utility Model Content

[0004] This invention addresses the aforementioned shortcomings of existing technologies by providing a mobile pressure vessel ladder that reduces the risk of equipment failure throughout its entire lifecycle and extends its safe service life. It boasts extremely high utilization and is convenient and flexible to use. Compared to existing technologies, this device reduces manufacturing and maintenance costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A mobile pressure vessel ladder includes a base with casters at the lower end and support studs on both sides. A support frame is located at the upper end of the base, with an inclined fixed ladder connected to one side of the support frame. A lifting platform is located above the support frame, with a vertical ladder connected to one end of the lifting platform. Lifting frames are connected to both sides of the vertical ladder, and the lifting frames slide against the support frame. The upper end of the lifting frames is connected to the bottom of the lifting platform, and a telescopic platform is connected to the other end of the lifting platform. In use, the telescopic platform rests on the maintenance platform on top of the pressure vessel.

[0007] Preferably, the base has first ear plates on both sides, the support stud is threadedly engaged with the first ear plates, the upper end of the support stud has a first handle, and the lower end of the support stud has a support plate.

[0008] Preferably, the upper end of the base is provided with a counterweight.

[0009] Preferably, the fixed ladder is provided with first guardrails on both sides.

[0010] Preferably, the upper end of the support frame is provided with a fixed platform.

[0011] Preferably, the lifting frame is provided with a vertical guide rod, the support frame is provided with a guide block that cooperates with the guide rod, the upper end of the base is provided with a motor, the upper end of the motor is connected to a first lead screw, the upper end of the first lead screw is connected to the upper end of the support frame, and the bottom of the lifting frame is connected to a first nut sleeve that cooperates with the first lead screw.

[0012] Preferably, the lifting platform is provided with a second guardrail on both sides, and the vertical ladder is provided with a third guardrail on both sides.

[0013] Preferably, the telescopic platform is inserted into the bottom of the lifting platform, the lower end of the telescopic platform is provided with a second nut sleeve, the lower end of the lifting platform is connected to a second lead screw through a second ear plate, the second lead screw cooperates with the second nut sleeve, one end of the second lead screw is provided with a crank handle, and the other end of the second lead screw is provided with a limit block.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model is an independent device with no physical connection to the pressure vessel, fundamentally eliminating local stress concentration or corrosion problems caused by welding heat-affected zones or bolt holes. Moreover, it conforms to the principle of minimizing openings and accessories in pressure vessel design specifications, reducing the risk of failure throughout the equipment's life cycle and extending its safe service life. The device can be moved within the plant area, serving multiple vessels in different locations, with extremely high utilization. It is especially suitable for scenarios where vessels are dispersed or maintenance tasks are not fixed, and is convenient and flexible to use. Compared with existing technologies, this device reduces manufacturing and maintenance costs.

[0016] 2. This utility model requires no installation and can be used immediately upon arrival at the site. It can directly, horizontally, and safely extend the passageway and connect it to the entrance of the maintenance platform on top of the container, allowing personnel to enter smoothly and eliminating the risk of crossing.

[0017] 3. This utility model can be height adjusted, and with the adjustable telescopic platform, it can increase the versatility of use. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is the front view of the present invention;

[0020] Figure 3 This is the right view of the present invention;

[0021] Figure 4 A schematic diagram of the structure for the cooperation between the lifting platform and the telescopic platform;

[0022] Figure 5 This is a schematic diagram of the structure of this utility model in use;

[0023] In the diagram: 1-Base; 101-Moving wheel; 102-Support plate; 103-Support stud; 104-First handle; 105-First ear plate; 2-Fixed ladder; 201-First guardrail; 3-Support frame; 301-Fixed platform; 302-Guide block; 303-First lead screw; 304-Motor; 4-Lifting platform; 401-Second guardrail; 402-Third guardrail; 403-Telescopic platform; 404-Lifting frame; 405-Guide rod; 406-First nut sleeve; 407-Limit block; 408-Second lead screw; 409-Second nut sleeve; 410-Crank handle; 411-Second ear plate; 412-Vertical ladder; 5-Counterweight; 6-Pressure vessel; 601-Maintenance platform. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 , Figure 2 As shown, a mobile pressure vessel ladder includes a base 1, with casters 101 (universal casters with brakes) at the lower end of the base 1, support studs 103 on both sides of the base 1, and first ear plates 105 on both sides of the base 1. The support studs 103 are threadedly engaged with the first ear plates 105. The upper end of the support studs 103 is provided with a first handle 104, and the lower end of the support studs 103 is provided with a support plate 102 (with an anti-slip rubber pad at the bottom). The base 1 can move and can also be fixed by the support studs 103.

[0026] The upper end of the base 1 is provided with a support frame 3, which is a columnar frame structure. One side of the support frame 3 is connected to an inclined fixed ladder 2 with an angle of 45°-60° (preferably 55° to balance climbing comfort and space occupation). A lifting platform 4 is provided above the support frame 3. One end of the lifting platform 4 is connected to a vertical ladder 412, which allows climbing to the top of the lifting platform 4. Lifting frames 404 are connected to both sides of the vertical ladder 412. The lifting frames 404 slide with the support frame 3 to achieve height adjustment. The upper end of the lifting frame 404 is connected to the bottom of the lifting platform 4. The other end of the lifting platform 4 is connected to a telescopic platform 403, which can adjust the length. In use, the telescopic platform 403 is placed on the maintenance platform on top of the pressure vessel 6.

[0027] To improve stability during use, a counterweight 5 is provided at the upper end of the base 1, located in the middle of the support frame.

[0028] To improve safety during climbing, the fixed ladder 2 is equipped with first guardrails 201 on both sides, the lifting platform 4 is equipped with second guardrails 401 on both sides, and the vertical ladder 412 is equipped with third guardrails 402 on both sides.

[0029] The upper end of the support frame 3 is equipped with a fixed platform 301 (≥0.8m x 0.8m). When personnel reach the top of the support frame 3 via the fixed ladder 2, they can stand at the fixed platform 301 and then climb up along the vertical ladder 412. To ensure safety, a safety gate can be installed at the entrance of the fixed platform.

[0030] The lifting frame 404 has a vertical guide rod 405 inside, the support frame 3 has a guide block 302 that cooperates with the guide rod 405, and the upper end of the base 1 has a motor 304. Figure 3 As shown, the upper end of the motor 304 is connected to a first lead screw 303, and the upper end of the first lead screw 303 is connected to the upper end of the support frame 3. The motor 304 can drive the first lead screw 303 to rotate. The bottom of the lifting frame 404 is connected to a first nut sleeve 406 that cooperates with the first lead screw 303. The height adjustment of the lifting platform 4 is achieved through the cooperation between the lead screw and the first nut sleeve 406. The motor control box is located in an easily accessible position on the fixed platform 301 or the base 1 and is equipped with an emergency stop button.

[0031] like Figure 4 As shown, the telescopic platform 403 is inserted into the bottom of the lifting platform. That is, slots are provided on both sides of the bottom of the lifting platform, and the two ends of the telescopic platform 403 are engaged with the slots. The telescopic platform 403 and the lifting platform can slide together. The lower end of the telescopic platform 403 is provided with a second nut sleeve 409. The lower end of the lifting platform is connected to a second lead screw 408 through a second ear plate 411. The second lead screw 408 and the second ear plate 411 are connected by a bearing. The second lead screw 408 is engaged with the second nut sleeve 409. One end of the second lead screw 408 is provided with a crank handle 410, which is located above the fixed platform 301. The other end of the second lead screw 408 is provided with a limit block 407. By turning the crank handle 410, the telescopic platform 403 can be driven to move horizontally.

[0032] like Figure 5As shown, when using it, first climb to the top of the fixed platform 301, then turn the crank handle 410 to extend the telescopic platform 403. The extension length is adjusted according to the diameter of the pressure vessel 6 to ensure that the telescopic platform 403 can be placed on the maintenance platform 601 at the top of the pressure vessel 6 (personnel can get down from the fixed platform 301, or wait on the fixed platform 301 for the personnel below to finish adjusting the ladder). Start the motor 304 to raise the lifting platform so that the telescopic platform 403 is slightly higher than the entrance of the maintenance platform 601. Move the device to one side of the pressure vessel 6 so that the telescopic platform 403 is placed on the top of the maintenance platform 601. Turn the support stud 103 to support and fix the base 1 through the support plate 102. After fixing, personnel can climb up the vertical ladder 412 to the top of the lifting platform and then enter the maintenance platform 601.

[0033] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A mobile pressure vessel ladder, characterized in that: The system includes a base with casters at the bottom and support studs on both sides. A support frame is located at the top of the base, with an inclined fixed ladder connected to one side of the support frame. A lifting platform is located above the support frame, with a vertical ladder connected to one end of the lifting platform. Lifting frames are connected to both sides of the vertical ladder, and the lifting frames slide against the support frame. The upper end of the lifting frames is connected to the bottom of the lifting platform, and the other end of the lifting platform is connected to a telescopic platform. In use, the telescopic platform rests on the maintenance platform on top of the pressure vessel.

2. The mobile pressure vessel ladder as described in claim 1, characterized in that: The base has first ear plates on both sides, and the support stud is threaded to the first ear plates. The upper end of the support stud has a first handle, and the lower end of the support stud has a support plate.

3. The mobile pressure vessel ladder as described in claim 1, characterized in that: The base is equipped with a counterweight at its upper end.

4. The mobile pressure vessel ladder as described in claim 1, characterized in that: The fixed ladder is equipped with first guardrails on both sides.

5. A mobile pressure vessel ladder as described in claim 1, characterized in that: The upper end of the support frame is provided with a fixed platform.

6. A mobile pressure vessel ladder as described in claim 1, characterized in that: The lifting frame is provided with a vertical guide rod, the support frame is provided with a guide block that cooperates with the guide rod, the upper end of the base is provided with a motor, the upper end of the motor is connected to a first lead screw, the upper end of the first lead screw is connected to the upper end of the support frame, and the bottom of the lifting frame is connected to a first nut sleeve that cooperates with the first lead screw.

7. A mobile pressure vessel ladder as described in claim 1, characterized in that: The lifting platform is equipped with a second guardrail on both sides, and the vertical ladder is equipped with a third guardrail on both sides.

8. A mobile pressure vessel ladder as described in claim 1, characterized in that: The telescopic platform is inserted into the bottom of the lifting platform. The lower end of the telescopic platform is provided with a second nut sleeve. The lower end of the lifting platform is connected to a second lead screw through a second ear plate. The second lead screw cooperates with the second nut sleeve. One end of the second lead screw is provided with a crank handle, and the other end of the second lead screw is provided with a limit block.

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