A ladder for entering the tank of a tanker truck through a manhole in a special location.

Abstract

This utility model discloses a ladder for entering the tank of a tanker truck through a manhole in a special location, in the field of special equipment inspection and non-destructive testing technology. It includes a working platform and a tank body. The working platform is located on one side of the tank body, and a manhole is located on the top of the tank body. A limit baffle is bolted to the lower end of the outer surface of the manhole. A connecting section is bolted to the inner side of the limit baffle, and the connecting section is located on the curved surface inside the manhole. A connecting end is symmetrically hinged to the end of the connecting section opposite to the limit baffle. Several steps connect the two sets of connecting ends. This utility model, through the coordinated arrangement of the limit baffle, connecting section, connecting end, steps, and bolts, and by bolting the limit baffle and manhole together, ensures that the ladder is securely fixed to the tank body and matches the size of the manhole. This solves the problem of difficult access to manholes in special locations on most types of tanker trucks and greatly improves the safety of operators.

Description

Technical Field

[0001] This utility model relates to the technical field of special equipment inspection and non-destructive testing of special equipment, and in particular to a ladder for entering the tank through a manhole in a special location on a tank truck. Background Technology

[0002] During the manufacturing, periodic inspection and maintenance of pressure vessels, relevant inspections require personnel to enter the vessel through the manhole to conduct macroscopic inspections, non-destructive testing, weld grinding, maintenance work, etc. The auxiliary equipment used must be safe and reliable.

[0003] Currently, many mobile pressure vessels have manholes in challenging locations, making it difficult for workers to enter and posing safety hazards. Popular entry aids on the market include lightweight straight ladders and telescopic ladders, but these have two main problems: first, the fit with the manhole. With typical straight ladders, the upper part extends beyond the manhole flange at a right angle, causing obstruction for workers entering the vessel; second, the ladder cannot be securely fixed to the vessel, leading to the risk of slippage. The upper part of a typical straight ladder rests only on the inner edge of the manhole flange, relying solely on friction for stability, while the lower part rests at an angle to the bottom of the vessel. Given the presence of sewage and dirt at the bottom, there is a significant risk of slippage when workers step on the ladder, potentially causing the entire ladder to fall. Therefore, we propose a ladder for entering the vessel through a manhole in a special location on a tank truck. Utility Model Content

[0004] To address the aforementioned problem that many mobile pressure vessels have manholes in special locations, making it difficult for workers to enter the vessel and posing certain safety hazards, this utility model provides a ladder for entering the vessel through a manhole in a special location on a tank truck.

[0005] This utility model provides a ladder for entering the tank of a tanker truck through a manhole in a special location, and adopts the following technical solution:

[0006] A ladder for entering the tank of a tanker truck through a special manhole includes a working platform and a tank body. The working platform is located on one side of the tank body, and a manhole is provided on the top of the tank body. A limit baffle is bolted to the lower end of the outer surface of the manhole. A connecting middle section is bolted to the inner side of the limit baffle and is located on the curved surface inside the manhole. A connecting end is symmetrically hinged to the end of the connecting middle section opposite to the limit baffle. Several steps are connected between the two sets of connecting ends.

[0007] By adopting the above technical solution, the connecting middle section and the connecting end are first hinged together. After the connection is completed, the tank is entered through the manhole. The connecting middle section needs to be placed on the inner curved surface of the manhole, flush with the straight section of the manhole flange. Then, the limiting baffle is placed at a position flush with the cross-section of the outer flange of the manhole. The limiting baffle is connected to the manhole threadedly with bolts, so that the limiting baffle, the connecting middle section and the manhole form a reliable and fixed whole. At this time, the connecting end naturally falls to the bottom of the tank inside the tank by gravity. The operator works with the working platform and then enters the tank through the ladder to carry out the work. This ladder can solve the problem of difficult access to manholes in special locations of most tank truck models and greatly improves the safety of the operators.

[0008] Optionally, a limiting curved groove is provided at the lower end of the inner side of the limiting baffle, and a plurality of threaded holes are provided on the surface of the manhole, with the limiting curved groove on the limiting baffle aligned with the threaded holes on the manhole.

[0009] By adopting the above technical solution, the bolts are screwed into the inside of the limiting curved groove and the threaded hole, thereby fixing the limiting baffle and the manhole together.

[0010] Optionally, a fixed threaded protrusion is symmetrically connected to the side of the connecting middle section away from the connecting end, and a limiting hole is symmetrically opened at the upper end of the limiting baffle to be threadedly connected to the fixed threaded protrusion.

[0011] By adopting the above technical solution, the limiting baffle and the connecting middle section can be fixedly connected through the limiting hole and the fixed threaded protrusion.

[0012] Optionally, nuts are screwed onto the outer sides of both the bolt and the threaded protrusion.

[0013] By adopting the above technical solution, the bolt and threaded protrusion can be tightened by the nut, making the connection between the limit baffle and the connecting middle section more secure.

[0014] Optionally, the middle section of the connection is symmetrically provided with a connecting groove on the side opposite to the fixed thread protrusion, and both ends of the top of the connection end are provided with connecting protrusions that cooperate with the connecting groove. A pin is provided at the connection between the connecting groove and the connecting protrusion. A first pin hole matching the pin is opened on both sides of the connecting groove, and a second pin hole matching the pin is opened on both sides of the connecting protrusion.

[0015] By adopting the above technical solution, the pin is inserted into the inside of the connecting groove and the connecting protrusion, thereby enabling one end of the connecting middle section to be hinged to the connecting end.

[0016] Optionally, the surfaces of several of the steps are fitted with anti-slip pads.

[0017] By adopting the above technical solution, the friction between the user and the steps can be increased, thereby improving the safety of the user when using the ladder.

[0018] In summary, this utility model has at least one of the following beneficial effects:

[0019] By using a combination of limiting baffles, connecting middle section, connecting end, steps, and bolts, the limiting baffles and manholes are bolted together, allowing the ladder to be securely fixed to the tank and match the size of the manhole. This solves the problem of difficult access to manholes in special locations on most tank truck models and greatly improves the safety of workers.

[0020] By using the connecting groove, the first pin opening, the pin, the connecting protrusion, and the second pin opening in combination, the middle section and the end of the connection can be hinged together, allowing the end of the connection to rotate freely and improving the flexibility of the end of the connection. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0025] Figure 4 This is a front view structural diagram of the present invention;

[0026] Figure 5 This is a side view of the structure of this utility model;

[0027] Figure 6 This is a schematic diagram of an embodiment of the present invention.

[0028] In the diagram: 1. Limiting baffle; 101. Limiting curved groove; 102. Limiting hole; 2. Connecting middle section; 201. Fixing threaded protrusion; 202. Connecting groove; 203. First pin opening; 204. Pin; 3. Connecting end; 301. Connecting protrusion; 302. Second pin opening; 4. Step; 5. Manhole; 6. Working platform; 7. Tank body; 8. Nut; 9. Bolt; 10. Threaded hole. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in further detail below.

[0030] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 2 and Figure 6 This utility model provides an embodiment of a ladder for entering the tank of a tanker truck through a special manhole. The ladder includes a working platform 6 and a tank body 7. The working platform 6 is located on one side of the tank body 7. A manhole 5 is provided on the top of the tank body 7. A limit baffle 1 is screwed to the lower end of the outer surface of the manhole 5 by bolts 9. A limit curved groove 101 is provided inside the lower end of the limit baffle 1. Several threaded holes 10 are provided on the surface of the manhole 5. The limit curved groove 101 on the limit baffle 1 is aligned with the threaded holes 10 on the manhole 5. Bolts 9 are screwed into the limit curved groove 101 and the threaded holes 10, thereby fixing the limit baffle 1 and the manhole 5 together.

[0031] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 3 , Figure 4 and Figure 6 A connecting section 2 is screwed onto the inner side of the limiting baffle 1, and the connecting section 2 is located on the curved surface inside the manhole 5. A connecting end 3 is symmetrically hinged to one end of the connecting section 2 opposite to the limiting baffle 1. A fixed threaded protrusion 201 is symmetrically fixed to the other side of the connecting section 2 opposite to the connecting end 3. Limiting holes 102 are symmetrically opened at the upper end of the inner side of the limiting baffle 1, which are threadedly connected to the fixed threaded protrusion 201. The limiting baffle 1 and the connecting section 2 are fixedly connected through the threaded connection of the limiting holes 102 and the fixed threaded protrusion 201. Nuts 8 are screwed onto the outer sides of both the bolt 9 and the threaded protrusion 201. The nuts 8 tighten the bolt 9 and the threaded protrusion 201, making the connection between the limiting baffle 1 and the connecting section 2 more secure.

[0032] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 2 and Figure 5 The connecting section 2 has symmetrically arranged connecting grooves 202 on the side opposite to the fixed threaded protrusion 201. Both ends of the top of the connecting end 3 are fitted with connecting protrusions 301 that mate with the connecting grooves 202. A pin 204 is provided at the connection point between the connecting grooves 202 and the connecting protrusions 301. First pin openings 203 matching the pins 204 are provided on both sides of the connecting grooves 202, and second pin openings 302 matching the pins 204 are provided on both sides of the connecting protrusions 301. Inserting the pins 204 into the connecting grooves 202 and the connecting protrusions 301 allows one end of the connecting section 2 to be hinged to the connecting end 3.

[0033] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 2 and Figure 3 Several steps 4 are fixedly connected between the two sets of connecting ends 3, and anti-slip pads are fixedly fitted onto the surface of each step 4. This increases the friction between the user and the steps 4, improving the user's safety when using the ladder.

[0034] Working principle: In use, firstly, insert the connecting protrusion 301 and the connecting groove 202, aligning the first pin opening 203 with the second pin opening 302. Then, insert the pin 204 to hinge the connecting middle section 2 and the connecting end 3, allowing the connecting end 3 to rotate freely. After connection, the connecting end 3 enters the tank 7 through the manhole 5. The connecting middle section 2 needs to be placed on the inner curved surface of the manhole 5, flush with the straight section of the manhole 5 flange. Then, place the limiting baffle 1 flush with the cross-section of the outer flange of the manhole 5. The limiting hole 102 of the limiting baffle 1 is aligned with the connecting middle section 2. The threaded protrusion 201 is fixed and connected by a threaded combination. At the same time, the limiting curved groove 101 on the limiting baffle 1 is aligned with the threaded hole 10 on the manhole 5. Then, the nut 8 and bolt 9 are used to tighten them, so that the limiting baffle 1, the connecting middle section 2 and the manhole 5 form a reliable and fixed whole. At this time, the connecting end 3 naturally falls to the bottom of the tank body 7 by gravity. The operator works with the working platform 6 and then enters the tank body 7 through the ladder 4 to carry out the work. This ladder can solve the problem of difficult access to the manhole 5 in special positions of most tank truck models and greatly improves the safety of the operators.

[0035] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A ladder for tank truck special position manhole access to the tank, comprising a work platform (6) and a tank body (7), the work platform (6) is located on one side of the tank body (7), characterized in that: The top of the tank (7) has a manhole (5). The lower end of the outer surface of the manhole (5) is screwed with a limit baffle (1) by bolts (9). The inner side of the limit baffle (1) is screwed with a connecting middle section (2), and the connecting middle section (2) is located on the curved surface inside the manhole (5). The end of the connecting middle section (2) facing away from the limit baffle (1) is symmetrically hinged with a connecting end (3). Several steps (4) are connected between the two sets of connecting ends (3).

2. A ladder for tank truck special position manhole access to the tank operation according to claim 1, characterized in that: The lower end of the limiting baffle (1) is provided with a limiting curved groove (101), and the surface of the manhole (5) is provided with a number of threaded holes (10). The limiting curved groove (101) on the limiting baffle (1) is aligned with the threaded holes (10) on the manhole (5).

3. A ladder for tank truck special location manhole access to the tank, according to claim 1, characterized in that: The middle section (2) of the connection is symmetrically connected with a fixed thread protrusion (201) on the side opposite to the end of the connection (3), and the upper end of the limiting baffle (1) is symmetrically provided with a limiting hole (102) that is threadedly connected to the fixed thread protrusion (201).

4. A ladder for tank truck special location manhole access to the tank according to claim 3, characterized in that: Nuts (8) are screwed onto the outer sides of both the bolt (9) and the threaded protrusion (201).

5. A ladder for tank truck special location manhole access to the tank, according to claim 1, characterized in that: The connecting middle section (2) is symmetrically provided with connecting grooves (202) on the side away from the fixed thread protrusion (201). Both ends of the top of the connecting end (3) are provided with connecting protrusions (301) that cooperate with the connecting grooves (202). A pin (204) is provided at the connection between the connecting grooves (202) and the connecting protrusions (301). A first pin opening (203) that matches the pin (204) is opened on both sides of the connecting grooves (202). A second pin opening (302) that matches the pin (204) is opened on both sides of the connecting protrusions (301).

6. A ladder for tank truck special location manhole access to the tank, according to claim 1, characterized in that: The surfaces of several of the steps (4) are fitted with anti-slip pads.

Images