Railway oil tank truck anti-explosion detection robot

Abstract

The invention relates to the technical field of detection robots, in particular to a railway oil tank truck anti-explosion detection robot which is used in cooperation with a track and comprises a movable base, an electric push rod, a pull rope assembly and a detection device and further comprises a sealing assembly, an exhaust assembly and a compensation assembly. The compensation assembly comprises a bottom shell, an upper film, a connecting plate, a lower film and a water inlet pipe, the bottom shell is connected to the bottom of the sealing assembly, the upper film is connected to the outer wall of the sealing assembly, and a compensation cavity is formed by the upper film, the bottom shell and the sealing assembly. By arranging the compensation assembly, cold water is injected into the tank body through the compensation assembly, dynamic balance of air pressure in the tank body is achieved, the exhaust efficiency of the exhaust assembly is kept, the injected cold water has the cooling effect on the interior of the tank body, cooling of the tank body is accelerated, and when the cold water is injected, a compensation cavity in the compensation assembly expands, so that the cooling effect is improved. And the sealing effect between the sealing assembly and the tank opening is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of detection robots, in particular to an explosion-proof detection robot for railway oil tank cars. Background Art

[0002] Railway tank cars are a type of train that transports oil. After long-term use, grease will accumulate inside the tank, so workers need to enter the tank regularly for cleaning. However, when transporting gasoline, gasoline will evaporate inside the tank to produce a variety of toxic gases, such as methane, ethylene, benzene, toluene, etc., which can easily cause harm to workers during the cleaning process. Therefore, the inside of the tank needs to be deflated before cleaning, and then high-temperature and high-pressure water will be used to flush the inner wall of the tank to soften the internal grease, making it easier for subsequent workers to enter the interior for cleaning. At the same time, some toxic gases can also be discharged. After flushing, the water inside the tank is discharged, and then the gas concentration inside the tank is tested. Only when the test is qualified can workers enter the tank. Since the temperature inside the tank is relatively high after being flushed with hot water, especially in summer, the temperature will be higher, so it is also necessary to pour cold water on the outer wall of the tank to lower the temperature inside the tank. When it drops to a suitable temperature, workers will enter the tank for subsequent cleaning.

[0003] The existing detection method is to extend the detection robot into the tank body through a telescopic rod for detection. If the detection fails, it needs to be re-exhausted. However, the tank body has been exhausted before. Because the toxic gases in the tank body have different volatilities and diffusion rates, light gases (such as methane, ethylene, etc.) will rise quickly, while heavier gases (such as benzene, toluene, etc.) will be relatively deposited at a low place. At this time, the gases will be unevenly distributed inside the tank truck according to their physical properties, forming different gas phase layers, which are difficult to be discharged by themselves in a short time.

[0004] Therefore, a railway tank car explosion-proof detection robot is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an explosion-proof inspection robot for railway tank cars. In order to solve the problem that the toxic gas inside the tank body cannot be quickly discharged in a short time, an exhaust component is arranged to move with the detection device to exhaust the gas from the position where the toxic gas concentration exceeds the standard. At the same time, the tank mouth is sealed by a sealing component to prevent a large amount of air from entering the tank body and mixing with the toxic gas during exhaust, thereby affecting the exhaust efficiency. At the same time, the toxic gas is prevented from leaking from the tank mouth. In addition, a compensation component is used to inject cold water into the tank body to keep the air pressure inside the tank body in dynamic balance and maintain the exhaust efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The explosion-proof detection robot for railway tank cars is used in conjunction with the track, and includes a moving seat, an electric push rod, a pull rope assembly and a detection device, and also includes a sealing assembly, an exhaust assembly and a compensation assembly. The sealing assembly is connected to the bottom of the electric push rod, and the compensation assembly includes a bottom shell, an upper membrane, a connecting plate, a lower membrane and a water inlet pipe. The bottom shell is connected to the bottom of the sealing assembly, the upper membrane is connected to the outer wall of the sealing assembly, and forms a compensation cavity with the bottom shell and the sealing assembly. The two connecting plates are connected to the bottom of the sealing assembly, the lower membrane is connected to the outer wall of the connecting plate, and forms a connecting pipe with the connecting plate, and the compensation cavity is connected to the connecting pipe The water inlet pipe is connected to the sealing assembly and communicated with the compensation chamber. Water is transported to the compensation chamber through an external water pump connected to the water inlet pipe. The exhaust assembly is slidably connected to the connecting plate. The detection device is connected above the exhaust assembly. The pull rope assembly is connected to the exhaust assembly. The sealing assembly is pushed downward by the electric push rod to fit the inner wall of the tank mouth, and the compensation assembly is driven downward and driven into the tank body. The pull rope assembly drives the detection device to move inside the tank body through the exhaust assembly. The exhaust assembly extracts the gas inside the tank body and injects water into the tank body through the compensation assembly.

[0008] In the above scheme, in order to better discharge the internal toxic gas when the concentration exceeds the standard, the tank mouth is sealed by the sealing component to make the tank body in a sealed state, and then when the internal gas is pumped out, the outside air is prevented from entering the tank body and mixing with the toxic gas, so that the discharged gas contains a large amount of air, which affects the removal efficiency. In addition, the tank mouth is sealed by the sealing component, which also prevents the leakage of toxic gas during detection and causes harm to nearby workers. Because a closed space is formed, in order to better discharge the internal gas, water is injected into the tank body through the compensation component during exhaust. Because the tank body is in a sealed state, the internal pressure is high during exhaust. It keeps decreasing, and water is injected to compensate for the decreasing pressure. Because high-temperature and high-pressure water will be used to flush the inner wall of the tank before cleaning, the internal temperature is relatively high after the flushing, and the water discharged also has a cooling effect on the inside, which is convenient for workers to enter the interior for subsequent cleaning. Because the compensation component is connected to the outer wall of the sealing component, and the upper membrane is made of elastic material, it plays a protective role when the sealing component is fitted with the tank mouth, and the internal expansion of the compensation cavity is compensated when water is injected into the tank body, further improving the sealing effect. After the inspection is completed, the water injected into the tank body can also be used as cleaning water. After the internal cleaning of the tank body is completed, open the drain at the bottom of the tank truck to discharge the injected water.

[0009] Preferably, the sealing assembly includes a positioning block, a sealing block, left and right positioning plates and front and rear positioning plates, the front and rear positioning plates are connected to the bottom of the electric push rod, the left and right positioning plates are slidably connected below the front and rear positioning plates, the sealing block is slidably connected below the left and right positioning plates, the positioning block is connected to the bottom of the sealing block, and the cross-section of the positioning block is set to a trapezoid with the narrow end facing downward.

[0010] There is a positioning mechanism in the prior art, which can enable the detection device to enter the interior of the tank body well, but it cannot accurately find the center position of the tank mouth. In the above scheme, in order to find the center position, the bottom of the positioning block is first extended into the interior of the tank mouth. Because the diameter of the bottom of the positioning block is smaller than the diameter of the tank mouth, it is only necessary to lock the approximate position of the tank mouth, and the bottom of the positioning block can enter the interior of the tank mouth. When the positioning block continues to be pushed downward, the positioning block is pushed through the inner wall of the tank mouth to drive the sealing block to slide on the bottom of the left and right positioning plates and the front and rear positioning plates, and then the position of the sealing block is adjusted to find the center position of the tank mouth, so that the sealing block fits tightly with the inner wall of the tank mouth.

[0011] Preferably, the exhaust assembly includes a floating plate, an air intake cavity and an exhaust pipe, the floating plate is connected to a connecting plate, the connecting plate passes through a through hole, the air intake cavity is opened inside the floating plate, and feed ports are opened on upper and lower sides of the air intake cavity. A first movable rod is movably connected inside the air intake cavity, a first baffle is connected to the lower end of the first movable rod, a first spring is connected above the first baffle, the exhaust pipe is connected to the top of the floating plate and communicated with the air intake cavity, the top of the exhaust pipe is connected to a positioning block and extends to the outside, and the top of the exhaust pipe is communicated with an existing pump.

[0012] In the above scheme, the exhaust assembly is opened on the floating plate, and the detection device is driven up and down by the floating plate, so that the air inlet chamber is always located at the position of the toxic gas phase layer. Because the toxic gas will form a gas phase layer inside the tank body, the floating plate is driven by the pull rope assembly to drive the detection device up and down, so that it can perform detection at different heights inside the tank body, and stop when it encounters a high concentration position, so that the air inlet chamber is at a high concentration position, which makes it easier to discharge the gas. When the detection device is located at a relatively low position, in order to avoid the influence of injected water on the detection device, when the water level exceeds the position of the detection device, the water will lift the detection device through the floating plate. Because the toxic gas is not soluble in water, the toxic gas will also rise with the rise of the liquid level, so that the air inlet chamber is always located at the position of the meteorological layer.

[0013] Preferably, a connecting membrane is provided at the connecting point between the compensation chamber and the connecting pipe, and the cross section of the connecting membrane is set to be funnel-shaped.

[0014] In the above scheme, when there is water on the inner wall of the compensation chamber, the water will push the connecting membrane to expand and form a water outlet with a diameter smaller than the water inlet pipe, so that there is a certain pressure inside the compensation chamber and the volume expands, thereby improving the sealing effect of the tank mouth. In the absence of water, the connecting membrane will shrink by itself and seal the connection between the compensation chamber and the connecting pipe to prevent toxic gases from being discharged from the connecting pipe.

[0015] Preferably, the cross section of the bottom shell is set to be an inverted U shape, and the inner diameter is larger than the outer wall diameter of the floating plate.

[0016] In the above scheme, when the positioning block moves downward, in order to avoid the impact between the floating plate and the inner wall of the tank mouth, the bottom shell is set to an inverted U shape to form a protective groove at the bottom. When moving downward, the floating plate is received in the protective groove to avoid impact.

[0017] Preferably, the cross-section of the lower membrane is set to be arc-shaped, and the center of the circle is located on the side away from the connecting plate, and the detection device is in contact with the outer wall of the lower membrane.

[0018] In the above scheme, because the inside of the tank body is in a high temperature state during detection, the detection device is arranged inside the groove of the lower membrane. When it is detected that the toxic gas exceeds the standard and cold water is injected into the compensation cavity and the connecting pipe through the water inlet pipe, the cold water contacts the lower membrane and cools down the detection device, thereby reducing the impact of the high temperature inside the tank body on the detection device and increasing the service life of the detection device.

[0019] Preferably, the inner wall of the positioning block is slidably connected to a second moving rod, the bottom of the second moving rod is connected to a second baffle, the top of the second baffle is connected to a second spring, a discharge port is opened at the bottom of the bottom shell, the second baffle and the discharge port cooperate, and the feed port and the discharge port cooperate.

[0020] In the above scheme, when the detection is completed and the float plate is driven by the pull rope assembly to move the detection device upward, the feed port is connected to the discharge port. At this time, the first moving rod is connected to the second baffle, and the second baffle blocks the feed port under the float plate by pushing the first moving rod, and the first moving rod pushes the second baffle upward to open the discharge port, so that the air inlet chamber is connected to the compensation chamber, and the water on the inner wall of the compensation chamber is pumped out by the pump to reduce the pressure between the sealing block and the tank mouth, which is convenient for opening the tank mouth. At the same time, after the water enters the air inlet chamber, all the toxic gases remaining in the air inlet chamber and the exhaust pipe are discharged, thereby avoiding the leakage of toxic gases remaining on the inner wall of the pipe when the detection device comes out from the inside of the tank body, causing harm to the workers.

[0021] Preferably, the cross-sections of the feed port and the discharge port are both set to be isosceles trapezoids, and the cross-section of the floating plate is set to be T-shaped.

[0022] In the above scheme, the cross-sections of the feed port and the discharge port are set to be isosceles trapezoids so as to achieve better sealing effect when the feed port and the discharge port are connected. The float plate is set to be T-shaped so that the feed port under the float plate is away from the water surface, thereby preventing water from blocking the feed port under the float plate and affecting the exhaust effect.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. By setting up a compensation component and injecting cold water into the tank body through the compensation component, the dynamic balance of the air pressure inside the tank body is achieved, the exhaust efficiency of the exhaust component is maintained, and the injected cold water has a cooling effect on the inside of the tank body, accelerating the cooling of the tank body. At the same time, it can also be used as clean water for subsequent cleaning. When cold water is injected, the compensation cavity in the compensation component expands, further improving the sealing effect between the sealing component and the tank mouth.

[0025] 2. By setting up the exhaust component, the float plate and the detection device are set together, so that the air inlet cavity moves with the detection device. When an area where the gas concentration exceeds the standard is detected, the exhaust component can directly evacuate the area to improve the exhaust efficiency. At the same time, the float plate is connected to the connecting plate, so that the detection device fits the outer wall of the lower membrane, so that the cold water inside the connecting pipe can cool the detection device, reduce the impact of high temperature on the detection device, and increase the service life of the detection device.

[0026] 3. By setting the feed port and the discharge port, since the feed port is opened on the upper and lower sides of the air inlet cavity, the gas in the gas phase layer can be better sucked into the exhaust pipe, and at the end of the test, the water in the compensation cavity is discharged through the docking of the feed port and the discharge port, reducing the pressure of the sealing component and the tank mouth, thereby facilitating the separation of the sealing component and the tank mouth, and the water entering the exhaust component can push out the residual poisonous gas in the exhaust component. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a schematic diagram of a front cross-section of the present invention;

[0029] Figure 3 is a schematic diagram of a side cross-section of the present invention;

[0030] Figure 4 For the present invention Figure 2 The enlarged structural diagram of part A in the middle;

[0031] Figure 5 It is a structural schematic diagram of the connecting plate of the present invention;

[0032] Figure 6 For the present invention Figure 3 Schematic diagram of the structure of the enlarged part B

[0033] Figure 7 The structural schematic diagram of the floating plate of the present invention is

[0034] Figure 8 For the present invention Figure 7 Schematic diagram of the structure of the enlarged part C in the middle

[0035] Fig. 9 This is a structural schematic diagram of the present invention when the feed port and the discharge port are connected.

[0036] In the figure: 1. track; 2. moving seat; 3. electric push rod; 4. pull rope assembly; 5. detection device; 6. sealing assembly; 601. positioning block; 602. sealing block; 603. left and right positioning plates; 604. front and rear positioning plates; 7. exhaust assembly; 701. floating plate; 702. air inlet cavity; 7021. feed port; 7022. first moving rod; 7023. first baffle; 7024. first spring; 703. exhaust pipe; 704. through hole; 8. compensation assembly; 801. bottom shell; 8011. second moving rod; 8012. second baffle; 8013. second spring; 8014. discharge port; 802. upper membrane; 803. connecting plate; 804. lower membrane; 805. water inlet pipe; 806. compensation cavity; 807. connecting pipe; 808. connecting membrane. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, and combine the working state to make its structural features more detailed. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 9 The present invention provides a railway tank car explosion-proof detection robot, and the technical solution is as follows:

[0039] Railway tank car explosion-proof detection robot, reference Figure 1 , Figure 2 and Figure 3, used in conjunction with the track 1, including a moving seat 2, an electric push rod 3, a pull rope assembly 4 and a detection device 5, and also including a sealing assembly 6, an exhaust assembly 7 and a compensation assembly 8, the sealing assembly 6 is connected to the bottom of the electric push rod 3, the compensation assembly 8 includes a bottom shell 801, an upper membrane 802, a connecting plate 803, a lower membrane 804 and a water inlet pipe 805, the bottom shell 801 is connected to the bottom of the sealing assembly 6, the upper membrane 802 is connected to the outer wall of the sealing assembly 6, and forms a compensation cavity 806 with the bottom shell 801 and the sealing assembly 6, the two connecting plates 803 is connected to the bottom of the sealing component 6, the lower membrane 804 is connected to the outer wall of the connecting plate 803, and forms a connecting pipe 807 with the connecting plate 803, the compensation chamber 806 is connected to the connecting pipe 807, and water is transported to the inside of the compensation chamber 806 through an external water pump via a water inlet pipe 805, the exhaust component 7 is slidably connected to the connecting plate 803, the detection device 5 is connected above the exhaust component 7, the pull rope component 4 is connected to the exhaust component 7, and the sealing component 6 is pushed downward by the electric push rod 3, and the compensation component (8) is driven into the tank The tank body is sealed by the sealing component 6 to make the tank body in a sealed state, and then when the internal gas is extracted, the outside air is prevented from entering the tank body and mixing with the toxic gas, so that the discharged gas contains a large amount of air, which affects the removal efficiency. The tank mouth is sealed by the sealing component 6, which also prevents the leakage of toxic gas during detection and causes harm to nearby workers. The pull rope component 4 drives the detection device 5 to move inside the tank body through the exhaust component 7. The exhaust component 7 extracts the gas inside the tank body while injecting water into the tank body through the compensation component 8. When exhausting, water is injected into the tank body through the compensation component 8 to keep the air pressure in the tank body in dynamic balance. The discharged water also has a cooling effect on the inside. Because the compensation component 8 is connected to the outer wall of the sealing component 6, and the upper film 802 is made of elastic material, it plays a protective role when the sealing component 6 is fitted with the tank mouth, and the compensation cavity 806 expands when water is injected into the tank body, further improving the sealing effect. After the detection is completed, it can also be used as clean water. After the cleaning is completed, the injected cold water is discharged through the drain at the bottom of the tank truck.

[0040] As an embodiment of the present invention, refer to Figure 2 and Figure 3The sealing assembly 6 includes a positioning block 601, a sealing block 602, a left and right positioning plate 603 and a front and rear positioning plate 604. The front and rear positioning plate 604 is connected to the bottom of the electric push rod 3. The left and right positioning plates 603 are slidably connected to the bottom of the front and rear positioning plates 604, so that the left and right positioning plates 603 can slide forward and backward relative to the front and rear positioning plates 604. The sealing block 602 is slidably connected to the bottom of the left and right positioning plates 603, so that the sealing block 602 can slide left and right relative to the left and right positioning blocks 601. The positioning block 601 is connected to the bottom of the sealing block 602, and the positioning block 6 01 The cross section is set to be trapezoidal, with the narrow end facing downward. First, extend the bottom of the positioning block 601 into the interior of the tank mouth. Because the diameter of the bottom of the positioning block 601 is smaller than the diameter of the tank mouth, it is only necessary to lock the approximate position of the tank mouth, and the bottom of the positioning block 601 can enter the interior of the tank mouth. When the positioning block 601 continues to be pushed downward, the positioning block 601 is pushed through the interior of the tank mouth to drive the sealing block 602 to slide at the bottom of the left and right positioning plates 603 and the front and rear positioning plates 604, and then adjust the position of the sealing block 602 to find the center position of the tank mouth, so that the sealing block 602 fits tightly against the inner wall of the tank mouth.

[0041] As an embodiment of the present invention, refer to Figure 2 , Figure 3 and Figure 6 The exhaust assembly 7 includes a floating plate 701, an air inlet cavity 702 and an exhaust pipe 703. The floating plate 701 is connected to a connecting plate 803. The connecting plate 803 passes through a through hole 704. The air inlet cavity 702 is opened inside the floating plate 701. The air inlet cavity 702 is provided with a feed port 7021 on both the upper and lower sides. The floating plate 701 is driven by the pull rope assembly 4 to drive the detection device 5 to move up and down to detect different heights inside the tank body. When a high concentration position is encountered, the detection device 5 stops, so that the air inlet cavity 702 is at a high concentration position, so that the gas can be discharged more conveniently. The air inlet cavity 702 is movably connected to a first moving rod 7022. The lower end of the first moving rod 7022 is connected to a first baffle plate 7023, and the first baffle plate 7023 is connected to a first spring 7024 above the first baffle plate 7023. The exhaust pipe 703 is connected to the top of the floating plate 701 and is communicated with the air inlet chamber 702. The top of the exhaust pipe 703 is connected to the positioning block 601 and extends to the outside. The top of the exhaust pipe 703 is communicated with the existing pump. When the water level rises to the bottom of the floating plate 701, the water will lift the detection device 5 through the floating plate 701 to avoid the influence of the injected water on the detection device 5. Because the toxic gas is not easily soluble in water, the toxic gas will also rise with the rise of the liquid level, so that the air inlet chamber 702 is always located at the position of the meteorological layer.

[0042] As an embodiment of the present invention, refer to Figure 4A connecting membrane 808 is provided at the connection point between the compensation chamber 806 and the connecting pipe 807. The cross section of the connecting membrane 808 is set to be funnel-shaped. When there is no water in the compensation chamber 806, the connecting membrane 808 will be in a contracted state to prevent the toxic gas from being discharged from the connecting pipe 807. When there is water in the compensation chamber 806, the water will push the connecting membrane 808 to open, forming a water outlet with a diameter smaller than the water inlet pipe 805, so that there is a certain pressure inside the compensation chamber 806 and the volume expands, thereby improving the sealing effect of the tank mouth.

[0043] As an embodiment of the present invention, refer to Figure 2 The cross section of the bottom shell 801 is set to be an inverted U shape, and the inner diameter is larger than the outer wall diameter of the floating plate 701. When the positioning block 601 moves downward, the floating plate 701 is received in the protection groove to avoid impact.

[0044] As an embodiment of the present invention, refer to Figure 2 and Figure 5 The cross-section of the lower membrane 804 is set to be arc-shaped, and the center of the circle is located on the side away from the connecting plate 803. The detection device 5 is fitted with the outer wall of the lower membrane 804. The cold water injected into the compensation cavity 806 and the connecting pipe 807 through the water inlet pipe 805 contacts the lower membrane 804 and cools the detection device 5, thereby reducing the influence of the high temperature inside the tank body on the detection device 5 and improving the service life of the detection device 5.

[0045] As an embodiment of the present invention, refer to Figure 3 , Figure 6 , Figure 7 , Figure 8 and Fig. 9The outer wall of the floating plate 701 is connected, and the inner wall of the positioning block 601 is slidably connected with a second moving rod 8011, the bottom of the second moving rod 8011 is connected with a second baffle 8012, and the second spring 8013 is connected above the second baffle 8012. A discharge port 8014 is opened at the bottom of the bottom shell 801, and the second baffle 8012 cooperates with the discharge port 8014, and the feed port 7021 cooperates with the discharge port 8014. When the detection is completed, the floating plate 701 is pulled by the pull rope assembly 4 to drive the detection device 5 to move up, which drives the feed port 7021 to move upward and is connected to the bottom of the discharge port 8014. At this time, the first baffle 7023 will push the second moving rod 8011 to move downward , thereby pushing the second baffle 8012 to move downward, and using the second baffle 8012 to block the feed port 7021 below the floating plate 701, and at the same time, the first baffle 7023 moves upward under the action of the reverse thrust of the second moving rod 8011 to open the discharge port 8014, so that the air inlet chamber 702 is connected with the compensation chamber 806, and the water inside the compensation chamber 806 is pumped out by the pump, reducing the pressure between the sealing block 602 and the tank mouth, which is convenient for opening the tank mouth. At the same time, after the water enters the air inlet chamber 702, all the toxic gases remaining in the air inlet chamber 702 and the exhaust pipe 703 are discharged, avoiding the leakage of toxic gases remaining on the inner wall of the pipeline when the detection device 5 comes out of the tank body, causing harm to the workers.

[0046] As an embodiment of the present invention, refer to Figure 6 The cross-sections of the feed port 7021 and the discharge port 8014 are both set to be isosceles trapezoids to improve the sealing effect when the feed port 7021 is connected to the discharge port 8014. The cross-section of the floating plate 701 is set to be T-shaped, so that the feed port 7021 below the floating plate 701 is away from the water surface, avoiding that the water blocks the feed port 7021 below the floating plate 701 during exhaust, allowing water to enter the exhaust pipe 703 and affect the exhaust effect of the exhaust pipe 703.

[0047] Working principle: before testing, high-temperature water is sprayed into the tank to flush the inside of the tank. After flushing, the detection device 5 is placed into the tank for testing through the electric push rod 3. In order to quickly discharge the internal gas at the detection position when the gas concentration exceeds the standard, the exhaust component 7, the compensation component 8 and the sealing component 6 are set. The sealing component 6 is first used to find the center position of the tank mouth, which is convenient for sealing the tank mouth, thereby preventing a large amount of air from entering the tank body and mixing with the poisonous gas when the exhaust component 7 is exhausted, affecting the exhaust efficiency, and also preventing the poisonous gas from leaking from the tank mouth. Cold water is injected into the tank body through the compensation component 8 to keep the internal air pressure of the tank body in dynamic balance and maintain the exhaust efficiency;

[0048] Specifically, when detecting the gas inside the tank, first push the sealing assembly 6 downward through the electric push rod 3 to make the sealing assembly 6 fit tightly against the inner wall of the tank mouth, and extend the detection device 5 into the tank. The pull rope assembly 4 controls the floating plate 701 to move up and down to control the detection device 5 to move up and down. When it is detected that the gas concentration at a certain height is too high, the movement is stopped and the pump is started to extract air. The toxic gas inside the tank enters the air inlet cavity 702 through the feed port 7021 and is then discharged through the exhaust pipe 703. At the same time, an external water pump is connected to the top of the water inlet pipe 805 to transport cold water to the compensation cavity 806. The cold water enters the tank through the compensation cavity 806 and the connecting pipe 807, so that the air pressure inside the tank reaches a dynamic balance, and the injected cold water has a cooling effect on the interior.

[0049] When the detection is completed, the floating plate 701 is pulled up by the pull rope assembly 4, and the detection device 5 is driven to move upward. When the floating plate 701 moves to the top, the top of the feed port 7021 above the floating plate 701 is connected to the bottom of the discharge port 8014. At this time, the first baffle 7023 will push the second moving rod 8011 to move downward, thereby pushing the second baffle 8012 to move downward, and use the second baffle 8012 to block the feed port 7021 below the floating plate 701. At the same time, the first baffle 7023 moves upward under the action of the reverse thrust of the second moving rod 8011 to open the discharge port 8014, so that the air inlet cavity 702 and the compensation cavity 8014 are connected. The cavity 806 is connected, and the water inside the compensation cavity 806 is pumped out by a pump, reducing the pressure between the sealing block 602 and the tank mouth, making it easier to open the tank mouth. At the same time, after the water enters the air inlet cavity 702, all the toxic gases remaining in the air inlet cavity 702 and the exhaust pipe 703 are discharged, avoiding the leakage of toxic gases remaining in the pipeline when the detection device 5 comes out of the tank body, causing harm to the workers, because additional water is required for cleaning and scraping the inside of the tank body, and the water injected into the inside can be used as cleaning water in addition to cooling. After cleaning, open the drain port at the bottom of the tank truck to discharge it together with the dirt.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A railway tank car explosion-proof detection robot, used in conjunction with a track (1), comprising a moving seat (2), an electric push rod (3), a pull rope assembly (4) and a detection device (5), characterized in that: The invention also includes a sealing component (6), an exhaust component (7) and a compensation component (8), wherein the sealing component (6) is connected to the bottom of the electric push rod (3), and the compensation component (8) includes a bottom shell (801), an upper membrane (802), a connecting plate (803), a lower membrane (804) and a water inlet pipe (805), wherein the bottom shell (801) is connected to the bottom of the sealing component (6), the upper membrane (802) is connected to the outer wall of the sealing component (6), and forms a compensation cavity (806) with the bottom shell (801) and the sealing component (6), the two connecting plates (803) are connected to the bottom of the sealing component (6), the lower membrane (804) is connected to the outer wall of the connecting plate (803), and forms a communication channel with the connecting plate (803). The water inlet pipe (805) is connected to the sealing component (6) and is connected to the compensation chamber (806). The exhaust component (7) is slidably connected to the connecting plate (803). The detection device (5) is connected above the exhaust component (7). The pull rope component (4) is connected to the exhaust component (7). The sealing component (6) is pushed downward by the electric push rod (3) and drives the compensation component (8) to enter the tank body. The pull rope component (4) drives the detection device (5) to move inside the tank body through the exhaust component (7). The exhaust component (7) extracts the gas inside the tank body and injects water into the tank body through the compensation component (8).

2. The railway tank car explosion-proof detection robot according to claim 1 is characterized in that: The sealing assembly (6) comprises a positioning block (601), a sealing block (602), left and right positioning plates (603) and front and rear positioning plates (604), wherein the front and rear positioning plates (604) are connected to the bottom of the electric push rod (3), the left and right positioning plates (603) are slidably connected below the front and rear positioning plates (604), the sealing block (602) is slidably connected below the left and right positioning plates (603), the positioning block (601) is connected to the bottom of the sealing block (602), and the cross-section of the positioning block (601) is set to be trapezoidal, with the narrow end facing downward.

3. The railway tank car explosion-proof detection robot according to claim 2 is characterized in that: The exhaust assembly (7) comprises a floating plate (701), an air intake cavity (702) and an exhaust pipe (703); the floating plate (701) is connected to a connecting plate (803); a through hole (704) is provided on the floating plate (701); the connecting plate (803) passes through the through hole (704); the air intake cavity (702) is provided inside the floating plate (701); and feed ports (7021) are provided on both upper and lower sides of the air intake cavity (702). The air inlet chamber (702) is movably connected to a first movable rod (7022), the lower end of the first movable rod (7022) is connected to a first baffle (7023), the upper part of the first baffle (7023) is connected to a first spring (7024), the exhaust pipe (703) is connected to the top of the floating plate (701) and communicates with the air inlet chamber (702), the top of the exhaust pipe (703) is connected to the positioning block (601) and extends to the outside.

4. The railway tank car explosion-proof detection robot according to claim 1 is characterized in that: A connecting membrane (808) is provided at the connection point between the compensation chamber (806) and the connecting pipe (807), and the cross section of the connecting membrane (808) is configured to be funnel-shaped.

5. The explosion-proof detection robot for railway tank cars according to claim 3 is characterized in that: The cross section of the bottom shell (801) is set to be an inverted U shape, and the inner diameter is larger than the outer wall diameter of the floating plate (701).

6. The explosion-proof detection robot for railway tank cars according to claim 1 is characterized in that: The cross section of the lower membrane (804) is designed to be arc-shaped, and the center of the circle is located on the side away from the connecting plate (803), and the detection device (5) is in contact with the outer wall of the lower membrane (804).

7. The explosion-proof detection robot for railway tank cars according to claim 3 is characterized in that: The inner wall of the positioning block (601) is slidably connected to a second moving rod (8011), the bottom of the second moving rod (8011) is connected to a second baffle (8012), the top of the second baffle (8012) is connected to a second spring (8013), a discharge port (8014) is provided at the bottom of the bottom shell (801), the second baffle (8012) and the discharge port (8014) cooperate, and the feed port (7021) and the discharge port (8014) cooperate.

8. The explosion-proof detection robot for railway tank cars according to claim 7 is characterized in that: The cross-sections of the feed port (7021) and the discharge port (8014) are both configured as isosceles trapezoids, and the cross-section of the floating plate (701) is configured as a T-shape.

Images