Tanker and fence device

Abstract

The embodiment of the application provides a tank truck and a fence device. The fence device comprises a fence, a safety door and a control system. The fence is arranged on the top of a tank body; the fence comprises a horizontal rod, a plurality of vertical rods arranged at intervals and a power member connected with at least one vertical rod; the top end of each vertical rod is rotatably connected with the horizontal rod, and the bottom end is rotatably connected with the top of the tank body; the power member drives the vertical rod to rotate, so that the vertical rod is rotated upward to be erected and unfolded or is rotated downward to be folded; the safety door comprises a door body surrounding the lower part of a ladder and capable of being opened and closed relative to the ladder and a locking member locking the door body and the ladder; the locking member is connected with the power member; the control system is connected with the locking member and is used for controlling the locking member to switch between a locking state and a release state; when the locking member is in the release state, the door body can be opened relative to the ladder, and the power member drives the vertical rod to rotate to the erected and unfolded state. Through linkage of the safety door and the fence, the effective lifting of the fence is ensured, and safety is ensured.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of transport vehicles, in particular to a tank truck and a fence device. BACKGROUND

[0002] In order to minimize the risk of the operating personnel operating on the top of the tank truck, at present, most tank trucks are provided with lifting fences on one side or both sides of the top. When needed, the fence is opened and erected to a certain height to prevent the operating personnel from falling from the top of the tank body and ensure the safety of operation. When not in use, the fence is lowered and stored on the top of the storage and transportation equipment to facilitate transportation.

[0003] However, the current lifting fence operation can be selectively lifted artificially, that is, the phenomenon that the operating personnel operates on the top of the tank without effectively lifting the fence is very common. Since the tank truck often carries various dangerous goods, the requirement for safe operation is extremely high, and if an accident occurs, it will seriously affect personal safety. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a fence device and a liquid tank truck with the fence device to solve the problem that the fence can be climbed when it is not lifted.

[0005] To solve the above technical problems, the embodiment of the present application provides a fence device, which comprises:

[0006] The fence is arranged on the top of the tank body. The fence comprises a horizontal rod, a plurality of vertical rods arranged at intervals, and a power member connected with at least one vertical rod. The top end of each vertical rod is rotatably connected with the horizontal rod, and the bottom end is rotatably connected with the top of the tank body. The power member drives the vertical rod to rotate, so that the vertical rod is unfolded and erected upward or the vertical rod is folded downward.

[0007] The safety door comprises a door body surrounding the lower part of the ladder and capable of being opened and closed relative to the ladder, and a locking member locking the door body and the ladder. The locking member is connected with the power member.

[0008] The control system is connected with the locking member and is used for controlling the locking member to switch between the locking state and the release state.

[0009] When the locking member is in the release state, the door body can be opened relative to the ladder, and the power member drives the vertical rod to rotate to the unfolded and erected state.

[0010] In one embodiment, the control system comprises:

[0011] The gas cylinder is used for providing a gas source.

[0012] a control valve connected with the gas cylinder;

[0013] a driving cylinder connected with the control valve; the driving cylinder is connected with the locking member;

[0014] The control valve is used to control the connection and disconnection between the driving cylinder and the gas cylinder. When the driving cylinder is disconnected with the gas cylinder, the driving cylinder is in the air-off state and the locking member is in the locking state. When the driving cylinder is connected with the gas cylinder, the driving cylinder is in the air-on state and the locking member is in the releasing state.

[0015] In one embodiment, the control valve is a two-position three-way valve, which includes a first air inlet, a second air inlet and a third air inlet. The first air inlet is communicated with the gas cylinder;

[0016] The air inlet of the driving cylinder is communicated with the third air inlet, and the air outlet of the driving cylinder is communicated with the gas cylinder;

[0017] The rod cavity of the locking member is communicated with the driving cylinder, and the rodless cavity of the locking member is communicated with the second air inlet.

[0018] In one embodiment, the bottom of the tank body is provided with a discharge port, the side of the tank body is provided with a discharge valve and a discharge guardrail arranged outside the discharge valve. The discharge guardrail can be flipped relative to the tank body to be in the open state or the locked state, so as to operate or not to operate the discharge valve.

[0019] The driving cylinder is connected with the discharge guardrail to drive the discharge guardrail to flip. When the driving cylinder is in the air-off state, the push rod of the driving cylinder is extended, and the discharge guardrail is in the locked state. When the driving cylinder is in the air-on state, the push rod of the driving cylinder is retracted, and the discharge guardrail can be flipped to the open state.

[0020] In one embodiment, the power member is a cylinder, which includes a rod cavity and a rodless cavity.

[0021] The control system further includes a first air control valve arranged between the locking member and the power member. The first air port of the first air control valve is communicated with the rod cavity of the locking member and the second air inlet of the control valve. The second air port and the third air port of the first air control valve are respectively communicated with the rod cavity and the rodless cavity of the power member.

[0022] The first roller of the first air control valve corresponds to the door body. When the door body is in the closed state, the door body presses the first roller, so that the first air port of the first air control valve is communicated with the second air port, and the gas can enter the rod cavity of the power member.

[0023] In one embodiment, the horizontal rod comprises a longitudinal rail extending in the longitudinal direction and a transverse rail extending in the transverse direction, the transverse rail being arranged at the end of the longitudinal rail; the fence further comprises a telescopic driving member for driving the transverse rail to move in the longitudinal direction and extend or retract relative to the longitudinal rail.

[0024] The control system further comprises a second pneumatic valve in communication with the telescopic driving member, the second pneumatic valve being connected with the locking member; the second pneumatic valve corresponds to one vertical rod, rotation of the vertical rod causes the vertical rod to approach or move away from the second pneumatic valve, and when the vertical rod is rotated to the vertical unfolded state, the vertical rod abuts against the second roller of the second pneumatic valve, so that the second pneumatic valve is ventilated and drives the telescopic driving member.

[0025] In one embodiment, the telescopic driving member comprises a cylinder and a telescopic rod, the cylinder is fixed to the longitudinal rail, the telescopic rod extends in the longitudinal direction and can extend or retract relative to the cylinder, the telescopic rod is fixedly connected with the transverse rail and drives the transverse rail to move in the longitudinal direction.

[0026] In one embodiment, an oil-water separator is arranged between the gas storage cylinder and the control valve.

[0027] The fence device further comprises a box body fixed to the side of the tank body, the box body is provided with an openable and closable box door, the control valve is located in the box body, and the control valve can be pressed to close the control valve when the box door is closed.

[0028] In one embodiment, the safety door further comprises:

[0029] A fixed block is fixed to the ladder and protrudes out of the ladder; a fixed hole extending in the vertical direction is formed in the fixed block;

[0030] A locking plate is fixed to the door body and is arranged vertically spaced apart from the fixed block; a locking hole extending in the vertical direction is formed in the locking plate;

[0031] A locking rod is inserted into the fixed hole and the locking hole to lock the door body and the ladder.

[0032] In one embodiment, the height of the safety door covers at least two steps of the bottom of the ladder.

[0033] The embodiments of the present application also provide a tank truck, comprising a tank body, a ladder arranged at the rear end of the tank body, and the fence device as described above.

[0034] From the above technical solution, the advantages and positive effects of the embodiment of the application are that:

[0035] The fence device of the embodiment of the application comprises a fence, a safety door and a control system, linkage between the safety door and the fence is realized, so that the fence is raised when the safety door is opened, effective raising of the fence is ensured, that is, the operating personnel can only climb the ladder to the tank top after the safety door is opened, and effective raising of the fence ensures the safety of the operating personnel.

[0036] Further, the fence is further linked with the unloading guardrail, so that the safety door can only be opened in the scenario of unloading, thereby standardizing the operation process of the operating personnel, and non-professional operating personnel cannot directly open the safety door by mechanical means, accidents are avoided, and safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a front view schematic diagram of one of the embodiments of the tank car in the embodiment of the application.

[0038] Figure 2 is a three-dimensional structure schematic diagram of the tank body and the fence in the embodiment of the application.

[0039] Figure 3 is a partial structure schematic diagram of the tank car in the embodiment of the application.

[0040] Figure 4 is a schematic diagram of the safety door in the embodiment of the application.

[0041] Figure 5 is a principle diagram of the control system in the embodiment of the application.

[0042] The following is a description of the reference signs: 100, tank car; 1, car frame; 2, tank body; 3, ladder; 31, step; 4, unloading guardrail; 51, fence; 511, vertical rod; 512, longitudinal rail; 513, transverse rail; 514, power piece; 515, telescopic driving piece; 5151, cylinder body; 5152, telescopic rod; 52, safety door; 521, door body; 522, locking piece; 523, fixed block; 524, locking plate; 525, locking rod; 531, air cylinder; 532, oil-water separator; 533, control valve; 5331, first air vent; 5332, second air vent; 5333, third air vent; 534, driving cylinder; 535, first air control valve; 536, second air control valve. DETAILED DESCRIPTION

[0043] The typical implementation embodying the features and advantages of the embodiments of the present application will be described in detail in the following description. It should be understood that the embodiments of the present application can have various changes on different implementations, which are all within the scope of the embodiments of the present application, and the description and drawings in the embodiments of the present application are essentially used for illustration, not for limiting the embodiments of the present application.

[0044] In order to further illustrate the principles and structures of the embodiments of the present application, the preferred embodiments of the embodiments of the present application will be described in detail in combination with the drawings.

[0045] Reference Figure 1 The embodiments of the present application provide a tank truck 100, which comprises a vehicle frame 1, a tank body 2 arranged on the vehicle frame 1, a ladder 3, a discharging mechanism and a fence device.

[0046] The tank body 2 has a loading space inside for loading materials. The materials can be liquid or powder.

[0047] The tank body 2 is provided with a feeding hole at the top and a discharging port at the bottom.

[0048] The discharging mechanism is arranged on the side of the tank body 2 for discharging the tank body 2. Specifically, the discharging mechanism comprises a plurality of discharging valves for discharging and pipelines.

[0049] The ladder 3 is arranged at the end of the tank body 2 for the operating personnel to climb onto the top of the tank body 2. In the present embodiment, the ladder 3 is arranged at the front end of the tank body 2. In other embodiments, the ladder 3 can also be arranged at the rear end of the tank body 2 and the side of the tank body 2. In some embodiments, the ladder 3 can be arranged at the front and rear ends of the tank body 2 or the side of the tank body 2, or only at one of the front and rear ends of the tank body 2 and one side of the tank body 2, which is arranged according to actual needs.

[0050] The height of the ladder 3 extends from the bottom of the tank body 2 to the top of the tank body 2. Specifically, the ladder 3 comprises a plurality of steps 31 arranged vertically. In the present embodiment, the lowest step 31 of the ladder 3 extends downward out of the tank body 2 and is connected with the vehicle frame 1.

[0051] For the convenience of description, the length direction of the tank body 2 is defined as the longitudinal direction, the width direction is defined as the transverse direction, the front end is close to the cab, and the rear end is away from the cab. The direction along the transverse direction and towards the axis of the tank body 2 is the inner direction, and the direction away from the axis of the tank body 2 is the outer direction.

[0052] The fence device comprises a fence 51, a safety door 52 and a control system. The safety door 52 is controlled to open by the control system, and then the fence 51 is lifted to ensure that the fence 51 is in the erected and unfolded state when the safety door 52 is opened, and the fence 51 is in the folded state when the safety door 52 is closed, which ensures the effective lifting of the fence 51 and the safety of the operating personnel.

[0053] Referring to Figure 2 The fence 51 is arranged on the top of the tank body 2. In this embodiment, the fence 51 covers both sides of the top of the tank body 2, i.e. the fence 51 is arranged on both sides of the top of the tank body 2.

[0054] The fence 51 comprises a horizontal rod, a plurality of vertical rods 511 arranged at intervals, and a power member 514 connected with at least one vertical rod 511.

[0055] The tank body 2 is provided with a plurality of vertical rods 511 on both sides in the transverse direction, and the plurality of vertical rods 511 are arranged at intervals in the longitudinal direction. The top end of each vertical rod 511 is rotatably connected with the horizontal rod, and the bottom end is rotatably connected with the top of the tank body 2.

[0056] The power member 514 drives the vertical rod 511 to rotate, so that the vertical rod 511 is rotated upward to be erected and unfolded, or the vertical rod 511 is rotated downward to be folded. The power member 514 is rotatably connected with the top of the tank body 2, and the power member 514 is rotatably connected with the vertical rod 511.

[0057] Specifically, two power members 514 are arranged on each side of the tank body 2 in the transverse direction, and the two power members 514 are arranged at intervals in the longitudinal direction and are connected with two vertical rods respectively. That is, four power members 514 are arranged on the top of the tank body 2. The power member 514 is arranged on the inner side of the vertical rod 511.

[0058] In this embodiment, the power member 514 is a pneumatic cylinder. The pneumatic cylinder comprises a cylinder body and a piston rod arranged in the cylinder body and capable of extending and retracting relative to the cylinder body. The cylinder body is rotatably connected with the top of the tank body 2, and the piston rod is connected with the vertical rod 511. The cylinder body comprises a rod cavity and a rodless cavity, and the piston rod is arranged in the rod cavity. The power member 514 is arranged obliquely, and the included angle between the power member 514 and the horizontal plane is an acute angle, i.e. the piston rod is arranged obliquely. When the piston rod extends, the vertical rod 511 is rotated upward to the erected state. When the piston rod retracts, the vertical rod 511 is rotated downward to the folded state.

[0059] The horizontal rod comprises a longitudinal rail 512 extending in the longitudinal direction and a transverse rail 513 extending in the transverse direction. The transverse rail 513 is arranged at the end of the longitudinal rail 512. In this embodiment, the transverse rail 513 is arranged at both ends of the longitudinal rail 512. In other embodiments, the transverse rail 513 can be arranged at only one end of the longitudinal rail 512.

[0060] In other embodiments, the horizontal rod can only comprise the longitudinal rail 512.

[0061] In the embodiment, the fence 51 is lowered from back to front to be in the stowed state, and is raised from front to back to be in the unfolded state. Therefore, when the transverse rail 513 is provided at both ends of the longitudinal rail 512, the transverse rail 513 at the back end is fixedly connected with the longitudinal rail 512 without being telescopic, and the transverse rail 513 at the front end is telescopic relative to the longitudinal rail 512 to ensure that the fence 51 in the stowed state does not exceed the tank body 2 in the longitudinal direction.

[0062] The fence 51 further comprises a telescopic driving member 515 for driving the transverse rail 513 to move in the longitudinal direction to extend or retract relative to the longitudinal rail 512.

[0063] Specifically, the telescopic driving member 515 comprises a cylinder 5151 and a telescopic rod 5152. The cylinder 5151 extends in the longitudinal direction and is fixed to the inner side of the longitudinal rail 512, and the telescopic rod 5152 extends in the longitudinal direction and is telescopic relative to the cylinder 5151. The telescopic rod 5152 is fixedly connected with the transverse rail 513 to drive the transverse rail 513 to move in the longitudinal direction.

[0064] In the embodiment, the telescopic driving member 515 is located at the front end and is fixedly connected with the transverse rail 513 at the front end. The transverse rail 513 at the back end is fixedly connected with the longitudinal rail 512.

[0065] The working principle of the fence 51 is as follows:

[0066] The power member 514 is started to drive the vertical rod 511 to rotate from bottom to top so that the vertical rod 511 is erected, and then the telescopic driving member 515 is started to drive the transverse rail 513 to extend relative to the longitudinal rail 512 so that the fence 51 is in the unfolded state, thereby ensuring the safety of the operator on the tank top in all directions.

[0067] The safety door 52 is linked with the fence 51, and the safety door 52 is opened at the same time as the fence 51 is unfolded, thereby ensuring the effective lifting of the fence 51. Figure 3 and Figure 4 The safety door 52 comprises a door body 521 surrounding the lower part of the ladder 3 and capable of being opened and closed relative to the ladder 3, and a locking member 522 locking the door body 521 and the ladder 3.

[0068] In the embodiment, the safety door 52 covers two steps 31. In other embodiments, the height is set according to specific needs.

[0069] The door body 521 is hingedly connected to the ladder 3, so that the door body 521 can be opened and closed relative to the ladder 3. When the door body 521 is in the open state, the operating personnel can step onto the lowest step 31 of the ladder 3 and gradually step onto the top of the tank body 2. When the door body 521 is in the closed state, the two lowest steps 31 of the ladder 3 are covered by the door body 521, so that the operating personnel cannot step on and cannot climb onto the top of the tank body 2 through the ladder 3.

[0070] The locking member 522 is arranged on the ladder 3. Specifically, the locking member 522 is a locking cylinder having a locking state and a release state. When the locking member 522 is in the locking state, the door body 521 and the ladder 3 are locked. When the locking member 522 is in the release state, the piston rod of the locking member 522 is retracted, the door body 521 is in the pre-opening state, and then the power member 514 drives the vertical rod 511 to rotate to the vertical and unfolded state.

[0071] The locking member 522 is connected to the power member 514 of the fence 51. When the locking member 522 is in the release state, the power member 514 drives the vertical rod 511 to rotate to the vertical and unfolded state. When the locking member 522 is in the locking state, the power member 514 drives the fence 51 to descend to the folded state.

[0072] Further, the safety door 52 further comprises a fixed block 523, a locking plate 524 and a locking rod 525. The fixed block 523, the locking plate 524 and the locking rod 525 constitute a mechanical locking structure. When the safety door 52 is in the pre-opening state due to the release state of the locking member 522, the operating personnel can manually open the mechanical locking structure, and finally open the safety door 52. The mechanical locking structure further ensures the correct opening and closing of the safety door 52.

[0073] The fixed block 523 is fixed to the ladder 3 and protrudes out of the ladder 3. The fixed block 523 is provided with a fixed hole extending in the vertical direction. The locking plate 524 is fixed to the door body 521 and is arranged vertically spaced apart from the fixed block 523. The locking plate 524 is provided with a locking hole extending in the vertical direction. The locking rod 525 is inserted into the fixed hole and the locking hole to lock the door body 521 and the ladder 3.

[0074] In this embodiment, the locking plate 524 comprises upper and lower wing plates arranged in parallel and spaced apart, and a side plate connecting the upper and lower wing plates, and the side plate is fixed to the door body 521, and the upper and lower wing plates are both provided with the locking hole.

[0075] The control system is connected to the locking member 522 and is used to control the locking member 522 to switch between the locking state and the release state, thereby controlling the lifting of the fence 51.

[0076] Referring to Figure 5 , the control system comprises an air cylinder 531, a control valve 533 and a driving cylinder 534.

[0077] The gas cylinder 531 is used to provide a gas source. The gas source is stored in the gas cylinder 531.

[0078] The control valve 533 is connected with the gas cylinder 531. Specifically, the control valve 533 is a two-position three-way valve, which includes a first air port 5331, a second air port 5332 and a third air port 5333. The first air port 5331 is in communication with the gas cylinder 531, and the second air port 5332 is in communication with the exhaust port of the locking member 522. The control valve 533 includes a handle. When the handle is in a pressed state, the first air port 5331 is in communication with the second air port 5332. When the handle is in a pulled-out state, the first air port 5331 is in communication with the third air port 5333.

[0079] Further, an oil-water separator 532 is arranged between the gas cylinder 531 and the control valve 533.

[0080] The intake port of the drive cylinder 534 is in communication with the third air port 5333. The drive cylinder 534 is connected with the intake port of the locking member 522 to provide gas to the locking member 522. When the drive cylinder 534 is in a cut-off state, the locking member 522 is in a locked state. When the drive cylinder 534 is in a gas supply state, the locking member 522 is in a released state.

[0081] Specifically, when the handle of the control valve 533 is pressed, the first air port 5331 is in communication with the third air port 5333, the drive cylinder 534 is in a cut-off state, and the locking member 522 is in a locked state. At this time, the fence 51 is in a retracted state. When the handle of the control valve 533 is pulled out, the first air port 5331 is in communication with the second air port 5332, the drive cylinder 534 is in a gas supply state, and the locking member 522 is in a released state. Thus, the power member 514 works to make the fence 51 in an erected and expanded state.

[0082] The control system further includes a first air control valve 535 arranged between the locking member 522 and the power member 514. The first air port of the first air control valve 535 is in communication with the exhaust port of the locking member 522 and the second air port 5332 of the control valve 533, and further in communication with the gas cylinder 531 to realize the gas supply function. The second air port and the third air port of the first air control valve 535 are respectively in communication with the rod cavity and the rodless cavity of the power member 514.

[0083] That is, the rotation of the vertical rod 511 is realized by the intake of the power member 514 through the first air control valve 535 to make the piston rod of the power member 514 extend or retract.

[0084] Specifically, the first pneumatic valve 535 is a roller pneumatic valve, and a roller of the roller pneumatic valve is arranged corresponding to the door body 521. When the door body 521 is in the closed state, the door body 521 presses the roller, so that the rod cavity of the power member 514 has gas, the piston rod of the power member 514 is retracted, the vertical rod 511 is rotated downward, and the folding of the vertical rod 511 is realized.

[0085] The control system further comprises a second pneumatic valve 536 in communication with the telescopic driving member 515, and the second pneumatic valve 536 is connected with the locking member 522. Specifically, in the embodiment, the second pneumatic valve 536 is arranged downstream of the first pneumatic valve 535. The first gas port of the second pneumatic valve 536 is in communication with the third gas port of the first pneumatic valve 535, so as to be capable of receiving or discharging gas. The second gas port and the third gas port of the second pneumatic valve 536 are respectively in communication with the rod cavity and the rodless cavity of the telescopic driving member 515.

[0086] When the second pneumatic valve 536 is pressed, the second pneumatic valve 536 is in the air-through state, and the telescopic rod 5152 of the telescopic driving member 515 is extended, so that the horizontal railing 513 is extended. Specifically, the second pneumatic valve 536 is arranged corresponding to one of the vertical rods 511. The rotation of the vertical rod 511 makes the vertical rod 511 close to or away from the second pneumatic valve 536. When the vertical rod 511 is rotated to the vertical and unfolded state, the vertical rod 511 abuts against the second pneumatic valve 536, so as to make the second pneumatic valve 536 air-through and drive the telescopic driving member 515. In the embodiment, the second pneumatic valve 536 is a roller pneumatic valve, and a roller of the roller pneumatic valve faces the corresponding vertical rod 511. When the vertical rod 511 is in the vertical state, the vertical rod 511 abuts against and presses the roller, so as to make the second pneumatic valve 536 in the air-through state.

[0087] The fence device further comprises a box body fixed to the side of the tank body 2, and the box body is provided with a box door capable of being opened and closed. The control valve 533 is located in the box door. When the control valve 533 is in the open state, the control valve 533 can be closed by closing the box door, so as to avoid the safety hazard caused by forgetting to close the control valve 533, and the safety is ensured.

[0088] The method of using the fence device in this embodiment is as follows: open the box door, open the control valve 533, i.e. pull the handle of the control valve 533, drive the cylinder 534 to communicate with the air cylinder 531 to be in the air communication state, make the gas enter the rod cavity of the locking piece 522, the piston rod of the locking piece 522 retracts to make the locking piece 522 be in the release state, and the locking between the door body 521 and the ladder 3 is released. At the same time, the first air control valve 535 has gas and enters the rodless cavity of the power piece 514, the piston rod of the power piece 514 extends, and the vertical rod 511 is driven to rotate to the vertical state. After the vertical rod 511 is vertical, the roller of the second air control valve 536 is pressed, the gas enters the rodless cavity of the telescopic driving piece 515, the telescopic rod 5152 of the telescopic driving piece 515 extends, the horizontal rail 513 is driven to extend, and the rising and unfolding process of the fence 51 is completed.

[0089] The operating personnel releases the locking of the locking rod 525 to the fixed block 523 and the locking plate 524, opens the door body 521, steps on the step 31 at the bottom of the ladder 3, and gradually climbs to the top of the tank body 2 through the ladder 3. The all-round protection of the fence 51 protects the safety of the operating personnel on the tank top.

[0090] After the operating personnel gets down from the tank top, the control valve 533 is closed to make the fence 51 descend and be retracted. The handle of the control valve 533 is pressed or the box door of the box body is closed, the cylinder 534 is driven to be disconnected with the air cylinder 531 to be in the air-off state, the gas in the control valve 533 enters the rodless cavity of the locking piece 522, the piston rod of the locking piece 522 extends to make the locking piece 522 be in the locking state, and the door body 521 and the ladder 3 are locked. At the same time, the door body 521 presses the roller of the first air control valve 535, the gas enters the rod cavity of the power piece 514, the piston rod of the power piece 514 retracts, and the vertical rod 511 is driven to rotate downward to the retracted state. At the same time, after the vertical rod 511 rotates downward, the roller of the second air control valve 536 is loosened, the gas enters the rod cavity of the telescopic driving piece 515, the telescopic rod 5152 of the telescopic driving piece 515 retracts, the horizontal rail 513 is driven to retract, and the descending and retracting process of the fence 51 is completed.

[0091] Further, the fence 51 is also linked with the unloading of the tank car 100, i.e. only in the unloading state, the safety door 52 can be opened.

[0092] Specifically, the side of the tank body 2 has an unloading guardrail 4, the unloading guardrail 4 can be flipped relative to the tank body 2 to be in the open state or the locked state, and then the unloading valve can be operated or cannot be operated.

[0093] When the unloading guardrail 4 is in the locked state, it extends vertically, blocks the unloading valve, and cannot operate the unloading valve. When the unloading guardrail 4 is in the open state, it rotates upward from the vertical extension to expose the unloading valve, and then the unloading valve can be operated.

[0094] The driving cylinder 534 is connected with the discharge guard 4 to drive the discharge guard 4 to overturn. When the driving cylinder 534 is in the air-off state, the push rod of the driving cylinder 534 is in the extended state, and the discharge guard 4 is in the locked state; when the driving cylinder 534 is in the air-on state, the push rod of the driving cylinder 534 is in the retracted state, and the discharge guard 4 can be overturned to the open state.

[0095] Therefore, the safety door 52 must be opened in the scenario of discharging through linkage with the discharge guard 4, so as to standardize the operation process of the operator, and non-professional operators cannot directly open the safety door 52 through mechanical means, avoiding accidents and ensuring safety.

[0096] The safety door 52, the fence 51 and the discharge guard 4 are linked together, the double protection mechanism of the safety door 52 is realized, the first protection mechanism of the safety door 52 is triggered by opening the control valve 533 to release the locking between the door body 521 and the ladder 3, and the second protection mechanism of the safety door 52 is triggered when the operator releases the locking of the fixing block 523 and the locking plate 524 by the locking rod 525, so as to finally open the safety door 52.

[0097] By setting the double protection mechanism, the operator must first trigger the first protection mechanism to open the safety door 52 through the second protection mechanism, and when the operator opens the safety door 52 to the top of the tank 2 through the second protection mechanism, the fence 51 is already in the raised state, strictly avoiding the operator or non-professional personnel to open the safety door 52 in the scenario other than discharging, and strictly avoiding the occurrence of safety incidents when the fence 51 is not raised and the operator goes to the top of the tank 2.

[0098] It should be understood that in other embodiments, the first protection mechanism can be triggered by setting an independent triggering mechanism, or combined with other functional components of the tank car, and a multiple protection mechanism can be further used to improve the safety of the tank car, as long as the technical solutions for improving the safety of the tank car through the multiple protection mechanism are covered by the overall inventive concept of the embodiments. From the above technical solutions, the advantages and positive effects of the embodiments of the present application are that:

[0099] The fence device of the embodiments of the present application comprises a fence, a safety door and a control system, the safety door is linked with the fence, so that the fence is raised when the safety door is opened, ensuring the effective raising of the fence, that is, the operator can only climb onto the top of the tank through the ladder after the safety door is opened, and the effective raising of the fence ensures the safety of the operator.

[0100] Further, the fence is also linked with the unloading guardrail, so that the safety door must be opened in the unloading scene, thereby being able to standardize the operation process of the operating personnel, and non-professional operating personnel cannot directly open the safety door through mechanical means, avoiding accidents and ensuring safety. Although the embodiments of the application have been described with reference to a few typical embodiments, it should be understood that the used terms are explanatory and exemplary, rather than restrictive terms. Since the embodiments of the application can be embodied in various forms without departing from the spirit or essence of the application, it should be understood that the above-described embodiments are not limited to any of the above-described details, but should be interpreted broadly within the spirit and scope of the appended claims, and therefore all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A fence arrangement, characterised in that The application relates to a tank body, which comprises a fence arranged on the top of the tank body; the fence comprises a horizontal rod, a plurality of vertical rods arranged at intervals and a power member connected with at least one vertical rod; the top end of each vertical rod is rotatably connected with the horizontal rod, and the bottom end is rotatably connected with the top of the tank body; the power member drives the vertical rod to rotate, so that the vertical rod is unfolded by rotating upwards or is folded by rotating downwards; a safety door comprises a door body capable of being opened and closed relative to a ladder and a locking member for locking the door body and the ladder; the locking member is connected with the power member; a control system is connected with the locking member and is used for controlling the locking member to switch between a locking state and a releasing state; when the locking member is in the releasing state, the door body can be opened relative to the ladder, and the power member drives the vertical rod to rotate to an unfolded state; the control system comprises: a gas storage cylinder for providing a gas source; a control valve connected with the gas storage cylinder; a driving cylinder connected with the control valve; the driving cylinder is connected with the locking member; the control valve is used for controlling the connection and disconnection between the driving cylinder and the gas storage cylinder; when the driving cylinder is disconnected with the gas storage cylinder, the driving cylinder is in a gas-off state, and the locking member is in the locking state; when the driving cylinder is connected with the gas storage cylinder, the driving cylinder is in a gas-on state, and the locking member is in the releasing state; the bottom of the tank body is provided with a discharge port, the side of the tank body is provided with a discharge valve and a discharge guardrail arranged outside the discharge valve; the discharge guardrail can be turned relative to the tank body to be in an open state or a locking state, so that the discharge valve can be operated or cannot be operated; the driving cylinder is connected with the discharge guardrail to drive the discharge guardrail to turn; when the driving cylinder is in the gas-off state, the push rod of the driving cylinder is extended, and the discharge guardrail is in the locking state; when the driving cylinder is in the gas-on state, the push rod of the driving cylinder is retracted, and the discharge guardrail can be turned to the open state. The control valve is a two-position three-way valve, which comprises a first gas inlet, a second gas inlet and a third gas inlet; the first gas inlet is communicated with the gas storage cylinder; the gas inlet of the driving cylinder is communicated with the third gas inlet, and the exhaust port of the driving cylinder is communicated with the gas storage cylinder; the rod cavity of the locking member is communicated with the driving cylinder, and the rodless cavity of the locking member is communicated with the second gas inlet. The power member is a cylinder, which comprises a rod cavity and a rodless cavity; the control system further comprises a first air control valve arranged between the locking member and the power member; the first gas port of the first air control valve is communicated with the rod cavity of the locking member and the second gas inlet of the control valve; the second gas port and the third gas port of the first air control valve are respectively communicated with the rod cavity and the rodless cavity of the power member. ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The enclosure apparatus of claim 1, wherein, ​ ​ ​ 3. The enclosure apparatus of claim 1, wherein ​ ​ The first roller of the first pneumatic valve is arranged corresponding to the door body, when the door body is in the closed state, the door body presses the first roller, so that the first gas port of the first pneumatic valve communicates with the second gas port, and the rod cavity of the power member can be filled with gas.

4. The enclosure of claim 1, wherein The horizontal rod comprises a longitudinal rail extending in the longitudinal direction and a transverse rail extending in the transverse direction, the transverse rail is arranged at the end of the longitudinal rail; the fence further comprises a telescopic driving member for driving the transverse rail to move in the longitudinal direction and extend or retract relative to the longitudinal rail; The control system further comprises a second pneumatic valve in communication with the telescopic driving member, the second pneumatic valve is connected with the locking member; the second pneumatic valve is arranged corresponding to one of the vertical rods, the rotation of the vertical rod makes it close to or away from the second pneumatic valve, and when the vertical rod is rotated to the vertical and unfolded, the vertical rod abuts against the second roller of the second pneumatic valve, so that the second pneumatic valve is ventilated and drives the telescopic driving member.

5. The enclosure of claim 4, wherein The telescopic driving member comprises a cylinder and a telescopic rod, the cylinder is fixed on the longitudinal rail, the telescopic rod extends in the longitudinal direction and can be telescopic relative to the cylinder, the telescopic rod is fixedly connected with the transverse rail and drives the transverse rail to move in the longitudinal direction.

6. The enclosure of claim 1, wherein An oil-water separator is arranged between the gas storage cylinder and the control valve. The fence device further comprises a box body fixed to the side of the tank body, the box body is provided with an openable and closable box door, the control valve is located in the box body, and when the box door is closed, the control valve can be pressed to close the control valve.

7. The enclosure of claim 1, wherein The safety door further comprises: A fixed block is fixed to the ladder and protrudes out of the ladder; the fixed block is provided with a fixed hole extending in the vertical direction; A locking plate is fixed to the door body and is arranged vertically spaced apart from the fixed block; the locking plate is provided with a locking hole extending in the vertical direction; A locking rod is inserted into the fixed hole and the locking hole to lock the door body and the ladder.

8. The enclosure of claim 1, wherein The height of the safety door covers at least two steps of the bottom of the ladder.

9. A tank truck characterized in that The fence device comprises a tank body, a ladder arranged at the rear end of the tank body, and the fence device according to any one of claims 1-8.

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