Tank cover structure and slag pot carrier

Abstract

The utility model provides a tank cover structure and a slag pot carrier. The tank cover structure comprises a first cover plate, a second cover plate, a first supporting rod, a second supporting rod and a rack. And the second cover plate is pivoted with the first cover plate. And the first supporting rod is pivoted with the second cover plate. The second supporting rod and the first supporting rod are arranged in a spaced mode, and the second supporting rod is pivoted to the second cover plate. The rack is pivoted with the first supporting rod and the second supporting rod. The problem that a tank cover is prone to being damaged in an existing first telescopic driving source and tank cover connecting mode is solved.

Description

Technical Field

[0001] The present application relates to the technical field of residue processing equipment, and in particular to a tank cover structure and a tank holding vehicle. Background Art

[0002] The tanker truck is a slag tanker transport vehicle with an articulated gooseneck connection and a slag tanker transport platform. It has the advantages of flexible steering and strong carrying capacity, and is widely used in the slow cooling and transportation of non-ferrous and ferrous metallurgical slag. When the existing tanker truck transports hot red slag, the high-temperature red slag is directly in contact with the air, which is easy to cause air pollution. At the same time, when transporting in bad weather such as rain, snow, and dust, it is easy to cause uneven cooling, which does not meet the requirements of the slag slow cooling residual copper crystallization process.

[0003] Equipping the tanker with a thermal insulation protective cover is a very effective solution to the above problem. For example, Chinese patent CN117844994A discloses a slag tank cover device and a tanker suitable for a tanker, wherein the tank cover adopts a folding opening and closing method. After the tanker arrives at the destination, the tank cover can be opened, and then the slag tank can be unloaded from the tanker using the arm.

[0004] When opening the tank cover, the second telescopic driving source is used to pull the front cover component to fold, and then the first telescopic driving source is used to pull the rear cover component to fold so that the front cover component and the rear cover component are away from the slag tank. Since the first telescopic driving source is single in number and has only one connection point with the rear cover component, it is easy for the rear cover component to be damaged by concentrated force. Therefore, the existing connection method between the first telescopic driving source and the tank cover has the problem of easily damaging the tank cover. Utility Model Content

[0005] The purpose of the present application is to provide a tank cover structure that is not easily damaged at the connection between the cover plate and the support rod, which is applied to a tank holding vehicle, and includes a first cover plate, a second cover plate, a first support rod, a second support rod and a frame. The second cover plate is pivotally connected to the first cover plate. The first support rod is pivotally connected to the second cover plate. The second support rod is spaced apart from the first support rod, and the second support rod is pivotally connected to the second cover plate. The frame is pivotally connected to the first support rod and the second support rod.

[0006] Optionally, the tank cover structure further includes a first telescopic rod and a connecting plate. The first telescopic rod is pivotally connected to the frame. The connecting plate is connected to the first support rod and the second support rod, and the connecting plate is pivotally connected to the first telescopic rod. When the first telescopic rod is extended or retracted, the first support rod and the second support rod can be driven to rotate.

[0007] Optionally, the connecting plate is connected to a middle position of the first supporting rod and a middle position of the second supporting rod.

[0008] Optionally, the length direction of the first support rod and the length direction of the second support rod are arranged parallel to each other.

[0009] Optionally, the tank cover structure further includes a third support rod and a fourth support rod, the third support rod and the fourth support rod are spaced apart, the third support rod and the second cover plate and the frame are pivotally connected, and the fourth support rod and the second cover plate and the frame are pivotally connected.

[0010] Optionally, the length direction of the third support rod and the length direction of the fourth support rod are arranged parallel to each other.

[0011] Optionally, the third support rod and the fourth support rod are pivotally connected to a middle position of the second cover plate in the width direction.

[0012] Optionally, the tank cover structure also includes a first sensor, a second sensor, a large arm, a second telescopic rod and a controller. The first sensor is arranged on the second cover plate, and when the angle between the first cover plate and the second cover plate reaches a first predetermined value, the first sensor is triggered and generates a first electrical signal. The second sensor is arranged on the tank holding vehicle, and when the rotation angle of the first support rod and the second support rod reaches a second predetermined value, the second sensor is triggered and generates a second electrical signal, and when the angle between the first cover plate and the second cover plate reaches the first predetermined value and the rotation angle of the first support rod and the second support rod reaches the second predetermined value, the first cover plate, the second cover plate, the first support rod, the second support rod, the third support rod and the fourth support rod are located outside the unloading motion trajectory of the slag pot.

[0013] The boom is provided on the tank holding vehicle, the slag pot is forked on the boom, and the slag pot can be unloaded when the boom rotates. The second telescopic rod is provided on the tank holding vehicle, the second telescopic rod is pivotally connected to the boom, and the second telescopic rod can drive the boom to rotate when it is extended. The controller is electrically connected to the first sensor, the second sensor, and the second telescopic rod, and the controller unlocks the second telescopic rod when receiving the first electrical signal and the second electrical signal.

[0014] Optionally, the tank cover structure further includes a proximity switch, which is disposed on the second telescopic rod, and the proximity switch is electrically connected to the controller, and the proximity switch is triggered when the upper arm is located in the retracted position.

[0015] The present application also provides a tank-holding vehicle, comprising the tank cover structure.

[0016] The beneficial effects of the present application are as follows: through the first cover plate, the second cover plate, the first support rod, the second support rod and the frame. The second cover plate is pivotally connected to the first cover plate. The first support rod and the second cover plate are pivotally connected. The second support rod and the first support rod are arranged spaced apart, and the second support rod and the second cover plate are pivotally connected. The frame is pivotally connected to the first support rod and the second support rod.

[0017] Since the second cover plate is connected to the first support rod and the second support rod at the same time, that is, the first support rod and the second support rod can provide support for the second cover plate at the same time, the force position of the second cover plate is dispersed, and the second cover plate is prevented from being damaged due to concentrated force.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the present application is described in detail below with reference to the preferred embodiments of the present application and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional diagram of a tank cover structure in one embodiment of the present application;

[0020] Figure 2 It is a side view of the tank cover structure in one embodiment of the present application (the first cover plate and the second cover plate are arranged on the slag tank, the first support rod and the second support rod are in the starting position, and the third support rod, the fourth support rod and the upper arm are in the retracted position);

[0021] Figure 3 It is a side view of the tank cover structure in one embodiment of the present application (the first cover plate is folded to a first predetermined angle between the first cover plate and the second cover plate, the second cover plate is covered on the slag tank, the first support rod and the second support rod are in the starting position, and the third support rod, the fourth support rod and the upper arm are in the retracted position);

[0022] Figure 4 It is a side view of the tank cover structure in one embodiment of the present application (the first cover plate is folded to a first predetermined angle between the first cover plate and the second cover plate, the first support rod and the second support rod are rotated to a second predetermined value, the third support rod and the fourth support rod are in the extended position, and the upper arm is in the retracted position);

[0023] Figure 5 It is a control block diagram of a tank cover structure in one embodiment of the present application;

[0024] Figure 6 is a diagram showing a change in motion state of the first support rod and the second support rod in one embodiment of the present application, in which the first support rod and the second support rod rotate from a starting position to a second predetermined value (the dotted line indicates the first support rod and the second support rod at the starting position);

[0025] Figure 7This is a state diagram of an embodiment of the present application, in which the slag pot is unloaded from the pot holding truck (the first cover plate is folded to a first predetermined angle between the first cover plate and the second cover plate, the first support rod and the second support rod are rotated to a second predetermined value, and the third support rod, the fourth support rod and the upper arm are in the expanded position).

[0026] Wherein, the reference numerals are:

[0027] 10. Tank cover structure

[0028] 100 First cover

[0029] 101 Second Cover

[0030] 102 first support rod

[0031] 103 Second support rod

[0032] 104 rack

[0033] 105 First Telescopic Rod

[0034] 106 Connecting plate

[0035] 107 Third support rod

[0036] 108 Fourth support rod

[0037] 109 First Sensor

[0038] 110 Second sensor

[0039] 111 Big Arm

[0040] 112 Second telescopic rod

[0041] 113 Third telescopic rod

[0042] 114 Controller

[0043] 115 Proximity switch

[0044] 20 Slag Pot

[0045] 200 Trunnion DETAILED DESCRIPTION

[0046] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0047] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments. In order to enable those skilled in the art to better understand the present application scheme, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present application.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] like Figure 1 As shown, in this embodiment, a tank cover structure 10 is provided, which is applied to a tank holding truck. The tank cover structure 10 includes a first cover plate 100, a second cover plate 101, a first support rod 102, a second support rod 103 and a frame 104. The second cover plate 101 is pivotally connected to the first cover plate 100. The first support rod 102 and the second cover plate 101 are pivotally connected. The second support rod 103 is spaced apart from the first support rod 102, and the second support rod 103 and the second cover plate 101 are pivotally connected. The frame 104 is pivotally connected to the first support rod 102 and the second support rod 103.

[0051] like Figure 1 As shown, the first cover plate 100 and the second cover plate 101 can be flattened and placed on the slag pot 20 (see Figure 2), the left end of the first cover plate 100 can be pivotally connected to the right end of the second cover plate 101. The first cover plate 100, the second cover plate 101, the first support rod 102 and the second support rod 103 can be made of steel. The two ends of the first support rod 102 can be pivotally connected to the second cover plate 101 and the frame 104 respectively, and the two ends of the second support rod 103 can be pivotally connected to the second cover plate 101 and the frame 104 respectively. The first support rod 102, the second support rod 103, the third support rod 107 and the fourth support rod 108 are used to support the first cover plate 100 and the second cover plate 101. The frame 104 can be a part of the tank truck frame. The top end of the first support rod 102 and the top end of the second support rod 103 can be pivotally connected to the left end of the second cover plate 101.

[0052] Since the second cover plate 101 is connected to the first support rod 102 and the second support rod 103 at the same time, that is, the first support rod 102 and the second support rod 103 can provide support for the second cover plate 101 at the same time, the force position of the second cover plate 101 is dispersed, and the second cover plate 101 is prevented from being damaged due to concentrated force.

[0053] Please also refer to Figure 1 and Figure 2 Optionally, the tank cover structure 10 further includes a first telescopic rod 105 and a connecting plate 106. The first telescopic rod 105 is pivotally connected to the frame 104. The connecting plate 106 is connected to the first support rod 102 and the second support rod 103. The connecting plate 106 is pivotally connected to the first telescopic rod 105. When the first telescopic rod 105 is extended or retracted, it can drive the first support rod 102 and the second support rod 103 to rotate. The rotation direction of the first support rod 102 and the second support rod 103 can be as follows: Figure 2 As shown by the one-way arrow on the first support rod 102 in FIG.

[0054] Please also refer to Figure 1 and Figure 2 , the first telescopic rod 105 can be a cylinder, a hydraulic cylinder or an electric screw. The two ends of the first telescopic rod 105 can be pivoted to the frame 104 and the connecting plate 106 respectively. The top of the first telescopic rod 105 can be pivoted to the middle upper end of the connecting plate 106. The connecting plate 106 can be connected to the first support rod 102 and the second support rod 103 by welding. The connecting plate 106 can be located between the first support rod 102 and the second support rod 103. The connecting plate 106 can be in the shape of a rectangular thin plate. The first telescopic rod 105 and the connecting plate 106 are pivotally connected, so that the first telescopic rod 105 can drive the first support rod 102 and the second support rod 103 to rotate at the same time, avoiding the setting of multiple telescopic rods to drive the first support rod 102 and the second support rod 103 respectively, so that the structure of driving the second cover plate 101 is more compact.

[0055] like Figure 1As shown, optionally, the connecting plate 106 is connected to the middle position of the first support rod 102 and the middle position of the second support rod 103. For example, the transverse middle plane of the connecting plate 106 can pass through the midpoint of the first support rod 102 and the midpoint of the second support rod 103.

[0056] like Figure 1 As shown, optionally, the length direction of the first support rod 102 and the length direction of the second support rod 103 are arranged parallel to each other. For example, the central axis of the first support rod 102 can be parallel to the central axis of the second support rod 103. The specifications of the first support rod 102 and the specifications of the second support rod 103 (including length, material and diameter, etc.) can be the same. In this way, the first support rod 102 and the second support rod 103 can rotate synchronously.

[0057] like Figure 1 As shown, optionally, the tank cover structure 10 further includes a third support rod 107 and a fourth support rod 108, the third support rod 107 and the fourth support rod 108 are arranged spaced apart, the third support rod 107 is pivotally connected to the second cover plate 101 and the frame 104, and the fourth support rod 108 is pivotally connected to the second cover plate 101 and the frame 104. The first support rod 102 and the second support rod 103 can be located between the third support rod 107 and the fourth support rod 108. The first support rod 102, the second support rod 103, the third support rod 107 and the fourth support rod 108 are arranged spaced apart from each other (i.e., the four do not contact each other).

[0058] The material of the third support rod 107 and the fourth support rod 108 may be steel. The two ends of the third support rod 107 may be respectively pivotally connected to the second cover plate 101 and the frame 104. The two ends of the fourth support rod 108 may be respectively pivotally connected to the second cover plate 101 and the frame 104. The arrangement of the third support rod 107 and the fourth support rod 108 may further disperse the force position of the second cover plate 101, and further avoid excessive concentration of force on the second cover plate 101.

[0059] like Figure 1 As shown, optionally, the length direction of the third support rod 107 and the length direction of the fourth support rod 108 are arranged parallel to each other. For example, the central axis of the third support rod 107 can be parallel to the central axis of the fourth support rod 108. The specifications of the third support rod 107 and the specifications of the fourth support rod 108 (including length, material and diameter, etc.) can be the same. In this way, the third support rod 107 and the fourth support rod 108 can rotate synchronously.

[0060] like Figure 1As shown, optionally, the third support rod 107 and the fourth support rod 108 are pivotally connected to the middle position of the width direction of the second cover plate 101. The width direction of the second cover plate 101 can be the left-right direction of the second cover plate 101. The top end of the third support rod 107 can be pivotally connected to the middle position of the front end of the second cover plate 101. The top end of the fourth support rod 108 can be pivotally connected to the middle position of the rear end of the second cover plate 101. With such an arrangement, when the first cover plate 100 is folded onto the second cover plate 101, the center of gravity of the whole formed by the two is close to the top end of the third support rod 107 and the top end of the fourth support rod 108, which reduces the force on the first support rod 102 and the second support rod 103, and further prevents the first support rod 102 and the second support rod 103 from being subjected to excessive force and damaging the second cover plate 101.

[0061] Please also refer to Figures 3 to 5 , optionally, a tank cover structure 10 (tank cover structure 10, please refer to Figure 1 ) also includes a first sensor 109, a second sensor 110, a large arm 111, a second telescopic rod 112 and a controller 114. The first sensor 109 is disposed on the second cover plate 101. When the angle α between the first cover plate 100 and the second cover plate 101 reaches a first predetermined value, the first sensor 109 is triggered and generates a first electrical signal.

[0062] Please also refer to Figure 3 and Figure 4 A third telescopic rod 113 may be provided on the second cover plate 101. When the third telescopic rod 113 is extended or retracted, it may drive the first cover plate 100 to rotate relative to the second cover plate 101 (the rotation direction of the first cover plate 100 relative to the second cover plate 101 may be as follows: Figure 3 The first cover plate 100 is shown as a one-way arrow on the first cover plate 100 in FIG. 1 ). The second telescopic rod 112 and the third telescopic rod 113 may be a cylinder, a hydraulic cylinder or an electric screw. The first sensor 109 and the second sensor 110 may be travel switches. The angle α between the first cover plate 100 and the second cover plate 101 may be the angle between the upper surface of the first cover plate 100 and the upper surface of the second cover plate 101.

[0063] For example, the range of the first predetermined value may be greater than or equal to 5° and less than or equal to 15°. For example, the first predetermined value may be 5°, that is, when the angle between the upper surface of the first cover plate 100 and the upper surface of the second cover plate 101 is 5°, the first sensor 109 is triggered. The first sensor 109 may be disposed on the upper surface of the second cover plate 101. The first sensor 109 may be a non-contact travel switch whose contact is slightly higher than the upper surface of the second cover plate 101. When the angle between the first cover plate 100 and the second cover plate 101 is 5°, the first sensor 109 generates a first electrical signal. This indicates that the first cover plate 100 has been folded into place relative to the second cover plate 101.

[0064] Please also refer to Figure 1 , Figure 3 , Figure 4 and Figure 6 The second sensor 110 is arranged on the tank holding truck. When the rotation angle β of the first support rod 102 and the second support rod 103 reaches a second predetermined value, the second sensor 110 is triggered and generates a second electrical signal. When the angle α between the first cover plate 100 and the second cover plate 101 reaches the first predetermined value and the rotation angle β of the first support rod 102 and the second support rod 103 reaches the second predetermined value, the first cover plate 100, the second cover plate 101, the first support rod 102, the second support rod 103, the third support rod 107 and the fourth support rod 108 are located outside the unloading movement trajectory of the slag pot 20.

[0065] Please also refer to Figure 1 , Figure 3 , Figure 4 and Figure 6 The first support rod 102 and the second support rod 103 may be the positions at which the first support rod 102 and the second support rod 103 are located when the first cover plate 100 and the second cover plate 101 cover the slag pot 20. The first support rod 102 and the second support rod 103 rotate synchronously.

[0066] The second predetermined value range may be greater than or equal to 5° and less than or equal to 15°. For example, the second predetermined value may be 5°, that is, the second sensor 110 may be set at a position after the first support rod 102 rotates 5° from the starting position. With such a configuration, the first support rod 102 may touch the second sensor 110 after rotating 5° counterclockwise from the starting position, which also indicates that the first support rod 102, the second support rod 103, the third support rod 107 and the fourth support rod 108 have been deployed in place. The second sensor 110 may be set on the frame of the tank truck. The second sensor 110 may be a contact travel switch, and when the first support rod 102 rotates from the starting position to reach the second predetermined value, it touches the second sensor 110 and generates a second electrical signal.

[0067] Please also refer to Figure 1 , Figure 4 and Figure 7 The unloading motion trajectory of the slag pot 20 is the path that the slag pot 20 passes through when it is forked from the pot holding vehicle to the ground by the big arm 111. Figure 4The first cover plate 100, the second cover plate 101, the first support rod 102, the second support rod 103, the third support rod 107 and the fourth support rod 108 are just moved to the state outside the unloading motion track of the slag pot 20. At this time, the second telescopic rod 112 can be unlocked to allow the second telescopic rod 112 to move. The first cover plate 100, the second cover plate 101, the first support rod 102, the second support rod 103, the third support rod 107 and the fourth support rod 108 are located outside the unloading motion track of the slag pot 20, that is, during the process of the slag pot 20 being unloaded from the tank holding vehicle, all parts of the slag pot 20 will not contact the first cover plate 100, the second cover plate 101, the first support rod 102, the second support rod 103, the third support rod 107 and the fourth support rod 108.

[0068] Please also refer to Figure 4 and Figure 5 The boom 111 is arranged on the tank holding vehicle, and the slag pot 20 is forked on the boom 111. When the boom 111 rotates, the slag pot 20 can be unloaded. The second telescopic rod 112 is arranged on the tank holding vehicle, and the second telescopic rod 112 is pivotally connected to the boom 111. When the second telescopic rod 112 is extended, the boom 111 can be driven to rotate (the rotation direction of the boom 111 can be as follows Figure 4 The controller 114 is electrically connected to the first sensor 109, the second sensor 110, the first telescopic rod 105 and the second telescopic rod 112. The controller 114 unlocks the second telescopic rod 112 when receiving the first electrical signal and the second electrical signal.

[0069] Please also refer to Figure 4 and Figure 5 , the second telescopic rod 112 can be extended and retracted only after being unlocked. The two ends of the second telescopic rod 112 can be pivotally connected to the frame of the tank holding vehicle and the bottom position of the arm 111 respectively. The bottom end of the arm 111 can be pivotally connected to the frame of the tank holding vehicle, and the top end of the arm 111 can fork the ear shaft 200 of the slag pot 20. The controller 114 can be a single chip microcomputer or a PLC (Programmable Logic Controller), and the controller 114 can be set on the tank holding vehicle.

[0070] Please also refer to Figure 1 and Figure 5, the controller 114 unlocks the second telescopic rod 112 only when it receives the first electrical signal and the second electrical signal, so that before the slag pot 20 is unloaded, the first cover plate 100, the second cover plate 101, the first support rod 102, the second support rod 103, the third support rod 107 and the fourth support rod 108 can be operated but the second telescopic rod 112 cannot be operated, thereby preventing the second telescopic rod 112 from being misoperated, and further preventing the slag pot 20 from colliding with the first cover plate 100, the second cover plate 101, the first support rod 102, the second support rod 103, the third support rod 107 or the fourth support rod 108 when being unloaded. The controller 114 and the first sensor 109, the second sensor 110, the first telescopic rod 105, the second telescopic rod 112 and the proximity switch 115 can be electrically connected through a cable.

[0071] Please also refer to Figure 4 , Figure 5 and Figure 7 , optionally, a tank cover structure 10 (tank cover structure 10, please refer to Figure 1 ) also includes a proximity switch 115, which is arranged on the second telescopic rod 112, and the proximity switch 115 is electrically connected to the controller 114. When the arm 111 is in the retracted position, the proximity switch 115 is triggered. The proximity switch 115 can be a photoelectric proximity switch. The sensing surface of the proximity switch 115 can face the arm 111. When the arm 111 is in the retracted position, the distance from the sensing surface of the proximity switch 115 to the arm 111 is the action distance, and the proximity switch 115 will be triggered. When the distance from the sensing surface of the proximity switch 115 to the arm 111 is greater than the action distance, the proximity switch 115 will not be triggered.

[0072] like Figure 3 As shown, when the proximity switch 115 is triggered, it indicates that the arm 111 has been retracted into place. At this time, if the first cover plate 100 and the second cover plate 101 are covered on the slag pot 20, the first cover plate 100 can be folded to expose the top of the slag pot 20. Figure 3 As shown, at this time, if the first cover plate 100 and the second cover plate 101 are not covered on the slag pot 20 , the first cover plate 100 and the second cover plate 101 can be flattened to cover the slag pot 20 .

[0073] In another embodiment, a tank holding vehicle is provided, which includes the tank cover structure 10 in the aforementioned embodiment.

[0074] The above is a detailed introduction to the tank cover structure and tank holding vehicle provided in the embodiments of the present application. For those skilled in the art, according to the ideas of the embodiments of the present application, there will be some changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application. All equivalent modifications or changes made according to the spirit and technical ideas of the present application should still be covered by the claims of the present application.

Claims

1. A tank cover structure, which is applied to a tank truck, characterized in that: include: first cover plate; A second cover plate, pivotally connected to the first cover plate; A first support rod pivotally connected to the second cover plate; A second support rod, which is spaced apart from the first support rod, and the second support rod is pivotally connected to the second cover plate; and A frame is pivotally connected to the first support rod and the second support rod.

2. The can cover structure according to claim 1, characterized in that: Also includes: A first telescopic rod, pivotally connected to the frame; as well as A connecting plate is connected to the first support rod and the second support rod. The connecting plate is pivotally connected to the first telescopic rod. When the first telescopic rod is extended or retracted, the first support rod and the second support rod can be driven to rotate.

3. The can cover structure according to claim 2, characterized in that: The connecting plate is connected to the middle position of the first supporting rod and the middle position of the second supporting rod.

4. The can cover structure according to claim 2, characterized in that: The length direction of the first support rod and the length direction of the second support rod are arranged parallel to each other.

5. The can cover structure according to claim 1, characterized in that: It also includes a third support rod and a fourth support rod, wherein the third support rod and the fourth support rod are arranged spaced apart, the third support rod is pivotally connected to the second cover plate and the frame, and the fourth support rod is pivotally connected to the second cover plate and the frame.

6. The can cover structure according to claim 5, characterized in that: The length direction of the third support rod and the length direction of the fourth support rod are arranged parallel to each other.

7. The can cover structure according to claim 5, characterized in that: The third support rod and the fourth support rod are pivotally connected to the middle position of the second cover plate in the width direction.

8. The can cover structure according to claim 5, characterized in that: Also includes: A first sensor, which is disposed on the second cover plate, when the angle between the first cover plate and the second cover plate reaches a first predetermined value, the first sensor is triggered and generates a first electrical signal; A second sensor is arranged on the tank holding vehicle, and when the rotation angle of the first support rod and the second support rod reaches a second predetermined value, the second sensor is triggered and generates a second electrical signal, and when the angle between the first cover plate and the second cover plate reaches a first predetermined value and the rotation angle of the first support rod and the second support rod reaches a second predetermined value, the first cover plate, the second cover plate, the first support rod, the second support rod, the third support rod and the fourth support rod are located outside the unloading movement trajectory of the slag pot; A boom, which is arranged on the tank-holding vehicle, the slag pot is forked on the boom, and the slag pot can be unloaded when the boom rotates; A second telescopic rod, which is arranged on the tank holding vehicle, the second telescopic rod is pivotally connected to the large arm, and the second telescopic rod can drive the large arm to rotate when it is extended and retracted; as well as A controller is electrically connected to the first sensor, the second sensor and the second telescopic rod, and the controller unlocks the second telescopic rod when receiving the first electrical signal and the second electrical signal.

9. The can cover structure according to claim 8, characterized in that: It also includes a proximity switch, which is arranged on the second telescopic rod. The proximity switch is electrically connected to the controller. When the arm is located at the retracted position, the proximity switch is triggered.

10. A tank truck, characterized in that: The invention comprises a can cover structure according to any one of claims 1 to 9.

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