Structural arrangement of skid-mounted platform for automatically detecting return of movable ladder

Abstract

The utility model relates to the technical field of loading and unloading vehicles, and discloses a structural arrangement of a skid-mounted platform for automatically detecting the homing of a movable ladder, which comprises the skid-mounted platform and the movable ladder, the skid-mounted platform is connected with a fixed frame, the fixed frame is vertically mounted on the skid-mounted platform, the fixed frame is hinged with the movable ladder, and the movable ladder is vertically mounted on the fixed frame. A mercury switch for automatically detecting whether the movable ladder returns or not is arranged in the movable ladder, and the mercury switch is connected with the electrical interlocking control system; the mercury switch can supply power at low voltage or micro current, and the folding state of the movable ladder can be detected through the on-off of the mercury switch, so that the mercury switch can be connected to an electrical interlocking control system on the skid-mounted platform, the state of the movable ladder also participates in the control of safety interlocking, manual participation is not needed, and the safety of the skid-mounted platform is improved. The field operation is more standardized and intelligent, and the problem that automatic interlocking safety control is not facilitated due to the fact that the movable ladder homing involves manual detection is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of loading and unloading vehicles, and more specifically, to the structural arrangement of a skid-mounted platform for automatically detecting the retraction of a movable ladder. Background Art

[0002] The skid used for top loading is a fluid docking device used in the loading and unloading of tank trucks. Generally, the staff is on the top layer of the skid, that is, on the skid-mounted platform, for equipment operation and pipeline docking; when the tank truck drives to the side of the skid, the staff needs to push the movable ladder with a hydraulic push rod forward from the vertical retracted state until the whole movable ladder is laid flat on the roof of the tank truck. At this time, the staff needs to walk along the movable ladder to the top of the tank truck for the loading and unloading operation of materials; after the loading and unloading operation is completed, the staff must retract the movable ladder back to the vertical retracted state again before notifying the tank truck to leave.

[0003] Currently, the movable ladders on the market do not have signal feedback on the ladder state and cannot perform some automatic interlock controls. Therefore, generally, the movable ladders on the skid are manually checked for whether they are retracted in place. The participation of manual detection is not conducive to automatic interlock safety control. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a structural arrangement of a skid-mounted platform for automatically detecting the retraction of a movable ladder, aiming to solve the problem in the prior art that the retraction of the movable ladder involves the participation of manual detection, which is not conducive to automatic interlock safety control.

[0005] The utility model is realized as follows. The structural arrangement of the skid-mounted platform for automatically detecting the retraction of the movable ladder includes a skid-mounted platform and a movable ladder. A fixed frame is connected to the skid-mounted platform. The fixed frame is vertically installed on the skid-mounted platform. The movable ladder is hinged to the fixed frame. A mercury switch for automatically detecting whether the movable ladder is retracted is arranged in the movable ladder. The mercury switch is connected to an electrical interlock control system.

[0006] When the movable ladder is in the vertical retracted state, the mercury switch is conducted with the electrical interlock control system.

[0007] When the movable ladder is in the horizontal state, the mercury switch is disconnected from the electrical interlock control system.

[0008] Further, the mercury switch includes a housing, mercury, a first conductor, and a second conductor. The mercury is contained inside the housing, and the first conductor and the second conductor are respectively arranged inside the housing.

[0009] When the movable ladder is in the vertical retracted state, the mercury switch is in the closed state, and both the first conductor and the second conductor are in contact with the mercury;

[0010] When the movable ladder is in the horizontal state, the mercury switch is in the open state, and either the first conductor or the second conductor is not in contact with the mercury.

[0011] Furthermore, the first conductor and the second conductor are respectively connected to a signal transmitter, and the signal transmitter is electrically connected to an electrical interlock control system. The first conductor and the second conductor are conducted through the mercury, so that an electrical circuit is formed among the first conductor, the second conductor, the mercury, and the signal transmitter.

[0012] Furthermore, an internal cavity is provided in the housing, the internal cavity is enclosed, and the mercury is located in the internal cavity.

[0013] Furthermore, the tops of the first conductor and the second conductor respectively penetrate through the bottom of the housing and are exposed on the bottom of the internal cavity, and the bottoms of the first conductor and the second conductor are respectively exposed outside the housing and are connected to the signal transmitter.

[0014] Furthermore, along the width direction of the housing, the first conductor and the second conductor are arranged at intervals in sequence.

[0015] Furthermore, the housing is made of insulating material.

[0016] Furthermore, the bottom of the movable ladder is connected to the bottom of the fixed frame through a hinge shaft, and two hydraulic rods are connected between the fixed frame and the movable ladder, and the two hydraulic rods are respectively connected to both sides of the fixed frame and the movable ladder.

[0017] Furthermore, the mercury switch is located in the bottom of the movable ladder, and the mercury switch is arranged vertically.

[0018] Furthermore, the movable ladder has a contact end face that contacts the top of the tank truck, and a protective layer is covered on the contact end face, and the contact end face contacts the top of the tank truck through the protective layer.

[0019] Compared with the prior art, the skid-mounted platform provided by the present utility model is used for the structural arrangement of automatically detecting the retraction of the movable ladder. The mercury switch can be powered by low voltage or micro current, and the retracted state of the movable ladder can be detected by the on-off of the mercury switch. In this way, the mercury switch can be connected to the electrical interlock control system on the skid-mounted platform, so that the state of the movable ladder can also participate in the control of the safety interlock, without the need for manual participation, making the on-site operation more standardized and intelligent, and solving the problem that the retraction of the movable ladder involves manual detection and is not conducive to the automatic interlock safety control. Brief Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the structural arrangement for automatically detecting the return position of the movable ladder provided by the present utility model on the skid-mounted platform;

[0021] Figure 2 It is a schematic sectional view of the structure of the mercury switch provided by the present utility model.

[0022] In the figure: skid-mounted platform 10, fixed frame 20, movable ladder 30, mercury switch 40, hydraulic rod 50, protective layer 60, outer shell 41, mercury 42, first conductor 43, second conductor 44, signal transmitter 45, internal cavity 46. Detailed Description of the Preferred Embodiment

[0023] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] The implementation of the present utility model will be described in detail below with reference to specific embodiments.

[0025] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] Refer to Figure 1-2 As shown, it is a preferred embodiment provided by the present utility model.

[0027] The structural arrangement of the skid-mounted platform 10 for automatically detecting the return position of the movable ladder 30 includes the skid-mounted platform 10 and the movable ladder 30. A fixed frame 20 is connected to the skid-mounted platform 10. The fixed frame 20 is vertically installed on the skid-mounted platform 10. The movable ladder 30 is hingedly connected to the fixed frame 20. A mercury switch 40 for automatically detecting whether the movable ladder 30 returns to its position is arranged in the movable ladder 30. The mercury switch 40 is connected to the electrical interlock control system;

[0028] When the movable ladder 30 is in the vertically retracted state, the mercury switch 40 is turned on with the electrical interlock control system;

[0029] When the movable ladder 30 is in a horizontal state, the mercury switch 40 is disconnected from the electrical interlock control system.

[0030] The provided skid-mounted platform 10 is used for the structural arrangement of automatically detecting the return position of the movable ladder 30. The mercury switch 40 can be powered by low voltage or micro-current. The retracted state of the movable ladder 30 can be detected by the on-off of the mercury switch 40. In this way, the mercury switch 40 can be connected to the electrical interlock control system on the skid-mounted platform 10, enabling the state of the movable ladder 30 to also participate in the control of the safety interlock, without the need for manual participation, making the on-site operation more standardized and intelligent, and solving the problem that the return of the movable ladder 30 involves manual detection and is not conducive to the automated interlock safety control.

[0031] In this embodiment, the mercury switch 40 includes a housing 41, mercury 42, a first conductor 43, and a second conductor 44. The mercury 42 is contained inside the housing 41, and the first conductor 43 and the second conductor 44 are respectively arranged inside the housing 41.

[0032] When the movable ladder 30 is in a vertically retracted state, the mercury switch 40 is in a closed state, and both the first conductor 43 and the second conductor 44 are in contact with the mercury 42.

[0033] When the movable ladder 30 is in a horizontal state, the mercury switch 40 is in an open state, and either the first conductor 43 or the second conductor 44 is not in contact with the mercury 42.

[0034] Due to the action of gravity, the mercury 42 in the mercury switch 40 drops onto the outer peripheries of the first conductor 43 and the second conductor 44 inside the housing 41. At this time, due to the conductive property of the mercury 42, it is equivalent to short-circuiting the first conductor 43 and the second conductor 44, providing an electrical loop externally, and thus can provide an electrical contact signal for various automatic control circuits, facilitating the electrical interlock control.

[0035] In this embodiment, the first conductor 43 and the second conductor 44 are respectively connected to a signal transmitter 45, and the signal transmitter 45 is electrically connected to the electrical interlock control system. The first conductor 43 and the second conductor 44 are conducted through the mercury 42, so that an electrical loop is formed among the first conductor 43, the second conductor 44, the mercury 42, and the signal transmitter 45. In this way, the mercury switch 40 can be wirelessly or wiredly connected to the electrical interlock control system through the signal transmitter 45, improving the diversity of the connection between the mercury switch 40 and the electrical interlock control system.

[0036] In this embodiment, the housing 41 has an internal cavity 46, and the internal cavity 46 is enclosed. The mercury 42 is located in the internal cavity 46. In this way, the mercury 42 can be prevented from leaking out of the internal cavity 46.

[0037] The tops of the first conductor 43 and the second conductor 44 respectively penetrate through the bottom of the housing 41 and are exposed on the bottom of the internal cavity 46. The bottoms of the first conductor 43 and the second conductor 44 are respectively exposed outside the housing 41 and are connected to the signal transmitter 45.

[0038] In this embodiment, along the width direction of the housing 41, the first conductor 43 and the second conductor 44 are arranged opposite to each other at intervals in sequence. In this way, direct contact between the first conductor 43 and the second conductor 44 can be prevented.

[0039] In this embodiment, the housing 41 is made of an insulating material. In this way, conduction between the first conductor 43 and the second conductor 44 through the housing 41 can be prevented.

[0040] In this embodiment, the bottom of the movable ladder 30 is connected to the bottom of the fixed frame 20 through a hinge shaft. Two hydraulic rods 50 are connected between the fixed frame 20 and the movable ladder 30. The two hydraulic rods 50 are respectively connected to both sides of the fixed frame 20 and the movable ladder 30. In this way, the stability of the swing of the movable ladder 30 on the fixed frame 20 can be increased through the hydraulic rods 50, and damage caused by too fast a downward swing speed of the movable ladder 30 can be prevented.

[0041] In this embodiment, the mercury switch 40 is located in the bottom of the movable ladder 30 and is arranged vertically. In this way, the state of the movable ladder 30 can be detected better.

[0042] In this embodiment, the movable ladder 30 has a contact end face that contacts the top of the tank car. The contact end face is covered with a protective layer 60, and the contact end face contacts the top of the tank car through the protective layer 60. In this way, the movable ladder 30 and the top of the tank car can be protected through the protective layer 60, and collision damage during the contact between the two can be prevented.

[0043] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. The skid-mounted platform is used to automatically detect the return of the movable ladder, which is characterized by: It comprises a skid-mounted platform and a movable ladder, wherein the skid-mounted platform is connected with a fixed frame, the fixed frame is vertically mounted on the skid-mounted platform, the movable ladder is hingedly connected to the fixed frame, and a mercury switch for automatically detecting whether the movable ladder is in position is arranged in the movable ladder, and the mercury switch is connected with an electrical interlocking control system; When the movable ladder is in a vertical return state, the mercury switch is connected to the electrical interlock control system; When the stepladder is in a horizontal state, the mercury switch is disconnected from the electrical interlock control system.

2. The skid-mounted platform as claimed in claim 1 is used for automatically detecting the return of a movable ladder, characterized in that: The mercury switch comprises a shell, mercury, a first conductor and a second conductor, wherein the mercury is contained inside the shell, and the first conductor and the second conductor are respectively arranged inside the shell; When the stepladder is in a vertical return state, the mercury switch is in a closed state, and both the first conductor and the second conductor are in contact with mercury; When the stepladder is in a horizontal state, the mercury switch is in an off state, and the first conductor or the second conductor is not in contact with mercury.

3. The skid-mounted platform as claimed in claim 2 is used for automatically detecting the return of a movable ladder, characterized in that: The first conductor and the second conductor are respectively connected to a signal transmitter, and the signal transmitter is electrically connected to an electrical interlocking control system. The first conductor and the second conductor are conducted through the mercury, so that the first conductor, the second conductor mercury and the signal transmitter form an electrical circuit.

4. The skid-mounted platform as claimed in claim 3 is used for automatically detecting the return of a movable ladder, characterized in that: The housing has an inner cavity therein, the inner cavity is arranged in a closed manner, and the mercury is located in the inner cavity.

5. The skid-mounted platform as claimed in claim 4 is used for automatically detecting the return of a movable ladder, characterized in that: The top of the first conductor and the top of the second conductor respectively pass through the bottom of the shell and are exposed on the bottom of the internal cavity, and the bottom of the first conductor and the bottom of the second conductor are respectively exposed outside the shell and connected to the signal transmitter.

6. The skid-mounted platform as claimed in claim 5 is used for automatically detecting the return of a movable ladder, characterized in that: Along the width direction of the housing, the first conductor and the second conductor are arranged in sequence and spaced apart from each other.

7. The skid-mounted platform according to any one of claims 2 to 6 is used for automatically detecting the return of a movable ladder, characterized in that: The shell is made of insulating material.

8. The skid-mounted platform according to any one of claims 1 to 6 is used for automatically detecting the return of a movable ladder, characterized in that: The bottom of the movable ladder is connected to the bottom of the fixed frame through a hinge shaft, two hydraulic rods are connected between the fixed frame and the movable ladder, and the two hydraulic rods are respectively connected to both sides of the fixed frame and the movable ladder.

9. The skid-mounted platform as claimed in claim 8 is used for automatically detecting the return of a movable ladder, characterized in that: The mercury switch is located in the bottom of the stepladder, and the mercury switch is arranged vertically.

10. The skid-mounted platform according to any one of claims 1 to 6 is used for automatically detecting the return of a movable ladder, characterized in that: The movable ladder is provided with a contact end surface in contact with the tank truck roof, the contact end surface is covered with a protective layer, and the contact end surface is in contact with the tank truck roof through the protective layer.

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