A closed device for the top unloading crane pipe of a negative pressure railway tank car

Abstract

The present invention relates to the field of crane pipe technology, and in particular to a closed device for unloading crane pipes on the top of a negative pressure railway tanker. Its technical solution includes: a tank body, a sealing flange, a sealing cover plate, a sealing sleeve and a sealing sleeve, a crane pipe body is arranged inside the tank mouth, and both sides of the outer walls of the crane pipe body are installed with limit calipers, and the limit calipers are provided with silicone flanges, and both sides of the outer walls of the crane pipe body are provided with sealing flanges, and one side of the outer wall of the sealing flange is provided with a sealing sleeve, and one side of the outer wall of the sealing sleeve is provided with a first bladder-type sealing device, and one side of the outer wall of the first bladder-type sealing device is installed with a sealing cover plate. By arranging the sealing sleeve, the sealing flange and the sealing cover plate, the effect of facilitating the use of the crane pipe body is achieved, the traditional open unloading method is changed, the light components inside the tank body are prevented from volatilizing into the atmosphere, the increase of the atmospheric VOCs content is avoided, and the unloading operation is ensured to be convenient.

Description

Technical Field

[0001] The invention relates to the technical field of crane pipes, and in particular to a crane pipe sealing device for unloading a negative pressure railway tank car from the top. Background Art

[0002] Railway tank cars are one of the main railway vehicles used in railway logistics. They are the main special vehicles used to load goods such as oil, liquid, and powder on railways. They are mainly horizontal cylindrical, but also vertical simple, trough, and funnel-shaped. They are divided into tank cars for loading light oil, viscous oil, acid tank cars, cement tank cars, and compressed gas tank cars. The negative pressure railway tank car is a tank body that unloads the liquid inside the tank car through the principle of negative pressure. The crane pipe is a retractable and movable pipe. The crane pipe is a special equipment for the fluid loading and unloading process in the petrochemical industry, also known as the fluid loading and unloading arm. It uses a rotating joint to connect with a rigid pipe and an elbow to realize the mobile equipment for transmitting liquid media between trains, automobile tank cars, and trestle storage and transportation pipelines, replacing the old hose connection. It has high safety, flexibility, and long life.

[0003] After searching, the patent announcement number CN106477507A discloses a tank truck unloading device with a thawing function, including an unloading crane pipe, an unloading pipeline, an unloading pump, a reflux crane pipe, a reflux pipe, a steam pipe and a heater; the reflux crane pipe is connected to the outlet end of the heater through the reflux pipe, and the unloading crane pipe is connected to the inlet end of the heater through the unloading pipeline, the unloading pump and the valve, and the heater is respectively connected with a condensate discharge pipe and a steam pipe. The lower end of the unloading crane pipe is inserted into the unfrozen liquid material in the middle of the tank truck, and the unloading pump is started to pump the liquid material into the heater through the unloading crane pipe and the unloading pipeline. After being heated by steam, the liquid material is returned to the tank truck through the reflux pipe and the reflux crane pipe. This process is repeated until the material in the tank truck is completely melted; then the melted material is transported to the material storage tank through the bypass pipe by the unloading pump. The present invention can greatly shorten the unloading time, improve the operating rate of personnel and equipment, reduce labor intensity, improve the working environment, and effectively reduce steam consumption.

[0004] At present, the unloading of light oil from railway tank cars is done by opening the top. During the unloading, light components volatilize into the atmosphere, increasing the VOCs content in the atmosphere and polluting the atmosphere. The several facilities used by the industry to collect the volatilized oil and gas during the unloading process are large in size, heavy in weight, and heavy in equipment, which have a great impact on the crane, and even require increasing the crane arm or changing to a hydraulic crane. Not only is the operation inconvenient, but the use effect is also poor. Summary of the invention

[0005] The object of the present invention is to provide a vacuum railway tank car top unloading crane pipe sealing device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a negative pressure railway tank car top unloading crane pipe sealing device, comprising a tank body, a sealing flange, a sealing cover plate, a sealing sleeve and a sealing sleeve, a tank mouth is opened on one side of the outer wall of the upper end of the tank body, a crane pipe body is arranged inside the tank mouth, limit clamps are installed on the outer walls of both sides of the crane pipe body, silicone flanges are arranged on the limit clamps, sealing flanges are arranged on the outer wall of one side of the sealing flange, a sealing sleeve is arranged on the outer wall of one side of the sealing sleeve, a first sac-type sealing device is arranged on the outer wall of one side of the first sac-type sealing device, and a sealing cover plate is installed on the outer wall of one side of the first sac-type sealing device.

[0007] When using a negative pressure railway tank car top unloading crane pipe sealing device in the technical solution, the staff puts the crane pipe body into the tank mouth, and the crane pipe body is inserted into the liquid collecting cavity inside the tank body. After the staff takes out the two sealing cover plates, the sealing cover plates are placed on the upper end of the tank mouth, and the staff manually pushes the sealing cover plates to move horizontally until the limit clamps and the sealing flanges are engaged with each other, and the connection stability between the sealing cover plates is ensured by the buckle. Then the staff manually presses the sealing cover plates to make the sealing cover plates enter the tank mouth, and then checks the first bladder sealing device. The sealing condition of the device is ensured to be tight, and then the oil is unloaded through the crane pipe body. During the oil unloading process, the outside gas replenishes the gas inside the tank body through the breathing tube and the automatic air inlet valve to prevent the formation of negative pressure. When it is necessary to observe the liquid level, the staff uses an explosion-proof flashlight to illuminate the light hole, and observes the liquid inside the tank body through the window, thus ensuring that the crane pipe body is easy to use. After the tank body is loaded and unloaded, the staff holds the handle with both hands and pulls it upwards to lift the sealing cover out of the tank mouth, and then opens the buckle to separate the sealing cover, thereby achieving the purpose of removing the sealing cover.

[0008] Preferably, a sealing sleeve is provided between the two silicone flanges, and a lightweight and highly elastic material is used to fill the space between the sealing sleeve and the crane body to ensure tight contact between the sealing sleeve and the crane body;

[0009] The silicone flange and the crane pipe body are sealed by oil-resistant material to ensure the sealing between the silicone flange and the crane pipe body.

[0010] Preferably, the limit clamps are distributed in a circular array on the outer wall of the crane body, and the outer wall of the limit clamps is connected to the silicone flange, which can ensure the position stability of the silicone flange.

[0011] Preferably, the sealing flange corresponds to the position of the limiting caliper, and the limiting caliper is clamped and installed inside the sealing flange, which can ensure the position stability of the sealing flange;

[0012] The sealing flange is located inside the tank mouth.

[0013] Preferably, a breathing tube is installed on one side of the upper outer wall of the sealing flange, and an automatic air intake valve is installed on one side of the upper outer wall of the breathing tube. The automatic air intake valve can input gas into the tank mouth and the inside of the tank body through the breathing tube to prevent negative pressure from forming inside the tank body.

[0014] Preferably, a second bladder-type sealing device is installed on the outer wall of one side of the sealing cover plate, and the second bladder-type sealing device can contact the inner wall of the tank mouth, and the sealing between the sealing cover plate and the tank mouth can be ensured by the second bladder-type sealing device.

[0015] Preferably, the two first bladder-type sealing devices form a complete circle, the first bladder-type sealing devices are wrapped on the sealing sleeve, and the elasticity of the first bladder-type sealing devices can seal the gap caused by the non-vertical crane tube body.

[0016] Preferably, a light hole is opened on one side of the outer wall of the upper end of the sealing cover plate, and borosilicate glass is embedded and installed inside the light hole. External bright light can penetrate the light hole and shine into the inside of the tank body, so as to adjust the brightness inside the tank body.

[0017] Preferably, a window is installed on one side of the outer wall of the upper end of the sealing cover plate, and borosilicate glass is embedded on one side of the inner wall of the window, so that the staff can observe the liquid level changes inside the tank body through the borosilicate glass.

[0018] Preferably, the two sealing cover plates are located inside the tank mouth, and the diameter of the sealing cover plates is smaller than the inner diameter of the tank mouth;

[0019] The upper end outer wall of the sealing cover plate is provided with equidistantly distributed parallel buckles, which ensure the stability of the connection between the sealing cover plates;

[0020] A handle is installed on one side of the outer wall of the upper end of the sealing cover plate, and the staff can drive the sealing cover plate to move through the handle, so that the sealing cover plate is moved out of the tank mouth.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention achieves the effect of facilitating the use of the crane tube body by arranging a sealing sleeve, a sealing flange and a sealing cover plate. The staff puts the crane tube body into the tank mouth, and inserts the crane tube body into the liquid collecting cavity inside the tank body. After the staff takes out the two sealing cover plates, the sealing cover plate is placed on the upper end of the tank mouth, and the staff manually pushes the sealing cover plate to move horizontally until the limit clamp and the sealing flange are engaged with each other, and the connection stability between the sealing cover plates is ensured by the buckle. Then the staff manually presses the sealing cover plate to make the sealing cover plate Enter the inside of the tank mouth, then check the sealing condition of the first bladder sealing device to ensure tight sealing, and then unload the oil through the crane pipe body. During the oil unloading process, the outside gas replenishes the gas inside the tank body through the breathing tube and the automatic air inlet valve to prevent the formation of negative pressure. When it is necessary to observe the liquid level, the staff uses an explosion-proof flashlight to illuminate the light hole and observe the liquid inside the tank body through the window, thus ensuring that the crane pipe body is easy to use, changing the traditional open unloading method, avoiding the volatilization of light components inside the tank body into the atmosphere, avoiding the increase of atmospheric VOCs content, and ensuring convenient unloading operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic cross-sectional view of the tank body structure of the present invention;

[0023] Figure 2 It is a top view schematic diagram of the sealing cover plate structure of the present invention;

[0024] Figure 3 It is an enlarged schematic diagram of the breathing tube structure of the present invention.

[0025] In the figure: 1. tank body; 11. tank mouth; 12. crane tube body; 13. sealing sleeve; 14. silicone flange; 15. limit caliper; 2. sealing flange; 21. breathing tube; 22. automatic air inlet valve; 23. sealing sleeve; 24. first bladder-type sealing device; 3. sealing cover plate; 31. light hole; 32. viewing window; 33. buckle; 34. second bladder-type sealing device; 36. handle. DETAILED DESCRIPTION

[0026] 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. 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 creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figures 1 to 3 , the present invention provides two embodiments:

[0030] Embodiment 1: A closed device for unloading a crane pipe on the top of a negative pressure railway tank car, comprising a tank body 1, a sealing flange 2, a sealing cover plate 3, a sealing sleeve 13 and a sealing sleeve 23. A tank opening 11 is provided on one side of the upper outer wall of the tank body 1, and a crane pipe body 12 is arranged inside the tank opening 11. Limiting calipers 15 are installed on both sides of the outer wall of the crane pipe body 12, and a silicone flange 14 is arranged on the limiting calipers 15. The outer walls of the crane pipe body 12 on both sides are provided with sealing flanges 2, and the sealing flanges 2 are provided. A sealing sleeve 23 is provided on the side outer wall, a first bladder-type sealing device 24 is provided on the outer wall on one side of the sealing sleeve 23, and a sealing cover plate 3 is installed on the outer wall on one side of the first bladder-type sealing device 24. Insert the crane tube body 12 into the liquid collection cavity at the bottom of the small tank body 1, mark the contact part between the crane tube body 12 and the tank mouth 11, and measure the insertion length; then insert the crane tube body 12 into the liquid collection cavity at the bottom of the large tank body 1, mark the contact part between the crane tube body 12 and the tank mouth 11, and measure the insertion length. The marking positions of the large and small tank bodies 1 differ by about 50cm. The contact part mark of the small tank body 1 is extended 20cm downward, and the contact part mark of the large tank body 1 is extended 30cm upward. The upper and lower marking lines after the movement are about 1m apart. The 1m crane tube body 12 is modified, and the positions of the two silicone flanges 14 are determined by the positions of the two marks.

[0031] A sealing sleeve 13 is arranged between the two silicone flanges 14, and a light and highly elastic material is used to fill the space between the sealing sleeve 13 and the crane body 12 to ensure the tight contact between the sealing sleeve 13 and the crane body 12;

[0032] The silicone flange 14 and the crane body 12 are sealed by oil-resistant material to ensure the sealing between the silicone flange 14 and the crane body 12.

[0033] The limiting clamps 15 are distributed in a circular array on the outer wall of the crane body 12 , and the outer wall of the limiting clamps 15 is connected to the silicone flange 14 , which can ensure the position stability of the silicone flange 14 .

[0034] The sealing flange 2 corresponds to the position of the limiting caliper 15, and the limiting caliper 15 is clamped and installed inside the sealing flange 2, which can ensure the position stability of the sealing flange 2;

[0035] The sealing flange 2 is located inside the tank opening 11 .

[0036] Embodiment 2: A closed device for unloading a crane pipe at the top of a negative pressure railway tank car comprises a tank body 1, a sealing flange 2, a sealing cover plate 3, a sealing sleeve 13 and a sealing sleeve 23. A tank mouth 11 is provided on one side of the outer wall of the upper end of the tank body 1, and a crane pipe body 12 is arranged inside the tank mouth 11. Limiting calipers 15 are installed on the outer walls of both sides of the crane pipe body 12, and silicone flanges 14 are arranged on the limiting calipers 15. Sealing flanges 2 are provided on the outer walls of one side of the sealing flange 2, a sealing sleeve 23 is provided on the outer wall of one side of the sealing sleeve 23, a first bladder-type sealing device 24 is provided on the outer wall of one side of the sealing sleeve 23, and a sealing cover plate 3 is installed on the outer wall of one side of the first bladder-type sealing device 24.

[0037] A sealing sleeve 13 is arranged between the two silicone flanges 14, and a light and highly elastic material is used to fill the space between the sealing sleeve 13 and the crane body 12 to ensure the tight contact between the sealing sleeve 13 and the crane body 12;

[0038] The silicone flange 14 and the crane body 12 are sealed by oil-resistant material to ensure the sealing between the silicone flange 14 and the crane body 12.

[0039] The sealing flange 2 corresponds to the position of the limiting caliper 15, and the limiting caliper 15 is clamped and installed inside the sealing flange 2, which can ensure the position stability of the sealing flange 2;

[0040] The sealing flange 2 is located inside the tank opening 11 .

[0041] A breathing tube 21 is installed on one side of the upper outer wall of the sealing flange 2, and an automatic air intake valve 22 is installed on one side of the upper outer wall of the breathing tube 21. The automatic air intake valve 22 can input gas into the tank mouth 11 and the inside of the tank body 1 through the breathing tube 21 to prevent negative pressure from forming inside the tank body 1.

[0042] A second bag-type sealing device 34 is installed on the outer wall of one side of the sealing cover plate 3 , and the second bag-type sealing device 34 can contact the inner wall of the tank mouth 11 , and the second bag-type sealing device 34 can ensure the sealing between the sealing cover plate 3 and the tank mouth 11 .

[0043] The two first bladder-type sealing devices 24 form a complete circle. The first bladder-type sealing devices 24 are wrapped on the sealing sleeve 13. The elasticity of the first bladder-type sealing devices 24 can seal the gap caused by the non-vertical crane pipe body 12. The staff manually presses the sealing cover plate 3 to make the sealing cover plate 3 enter the tank mouth 11, and then checks the sealing condition of the first bladder-type sealing device 24 to ensure tight sealing, and then unloads the oil through the crane pipe body 12.

[0044] A light hole 31 is opened on one side of the outer wall of the upper end of the sealing cover plate 3, and borosilicate glass is embedded and installed inside the light hole 31. External bright light can penetrate the light hole 31 to illuminate the inside of the tank body 1, and the brightness inside the tank body 1 can be adjusted.

[0045] A window 32 is installed on one side of the outer wall of the upper end of the sealing cover plate 3, and borosilicate glass is embedded on one side of the inner wall of the window 32. The staff can observe the liquid level changes inside the tank body 1 through the borosilicate glass. During the oil unloading process, the external gas replenishes the gas inside the tank body 1 through the breathing tube 21 and the automatic air intake valve 22 to prevent the formation of negative pressure. When it is necessary to observe the liquid level, the staff uses an explosion-proof flashlight to illuminate the light hole 31 and observe the liquid inside the tank body 1 through the window 32, thereby ensuring that the crane pipe body 12 is easy to use, changing the traditional open unloading method, avoiding the volatilization of light components inside the tank body 1 into the atmosphere, avoiding the increase of atmospheric VOCs content, and ensuring convenient unloading operation.

[0046] The two sealing cover plates 3 are located inside the tank opening 11, and the diameter of the sealing cover plates 3 is smaller than the inner diameter of the tank opening 11;

[0047] The outer wall of the upper end of the sealing cover plate 3 is installed with equidistant and parallel buckles 33, and the buckles 33 ensure the connection stability between the sealing cover plates 3. The staff puts the crane tube body 12 into the tank mouth 11, and the crane tube body 12 is inserted into the liquid collection cavity inside the tank body 1. After the staff takes out the two sealing cover plates 3, the sealing cover plate 3 is placed on the upper end of the tank mouth 11, and the staff manually pushes the sealing cover plate 3 to move horizontally until the limit clamp 15 and the sealing flange 2 are mutually engaged, and the buckles 33 ensure the connection stability between the sealing cover plates 3;

[0048] A handle 36 is installed on one side of the outer wall of the upper end of the sealing cover plate 3. The staff can use the handle 36 to move the sealing cover plate 3 so that the sealing cover plate 3 is moved out of the tank mouth 11. After the tank body 1 is loaded and unloaded, the staff holds the handle 36 with both hands and pulls it upwards to lift the sealing cover plate 3 out of the tank mouth 11, and then opens the buckle 33 to separate the sealing cover plate 3, thereby achieving the purpose of removing the sealing cover plate 3.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A negative pressure railway tank car top unloading crane pipe sealing device, comprising a tank body (1), a sealing flange (2), a sealing cover plate (3), a sealing sleeve (13) and a sealing sleeve (23), characterized in that: A tank opening (11) is provided on one side of the outer wall at the upper end of the tank body (1), a crane tube body (12) is arranged inside the tank opening (11), silicone flanges (14) are installed on both sides of the outer walls of the crane tube body (12), and limit clamps (15) are installed on the outer walls of the silicone flanges (14), and sealing flanges (2) are installed on both sides of the outer walls of the crane tube body (12), a sealing sleeve (23) is installed on one side of the outer wall of the sealing flange (2), a bladder-type sealing device (24) is installed on one side of the outer wall of the sealing sleeve (23), and a sealing cover plate (3) is installed on one side of the outer wall of the bladder-type sealing device (24); The sealing flange (2) corresponds to the position of the limiting caliper (15), and the limiting caliper (15) is clamped and installed inside the sealing flange (2), so as to ensure the position stability of the sealing flange (2); The sealing flange (2) is located inside the tank mouth (11); The two sealing cover plates (3) are located inside the tank mouth (11), and the diameter of the sealing cover plates (3) is smaller than the inner diameter of the tank mouth (11); The outer wall of the upper end of the sealing cover plate (3) is provided with equidistantly distributed parallel buckles (33), and the connection stability between the sealing cover plates (3) is ensured by the buckles (33); A handle (36) is installed on one side of the outer wall of the upper end of the sealing cover plate (3), and a worker can drive the sealing cover plate (3) to move by means of the handle (36), thereby moving the sealing cover plate (3) out of the tank opening (11).

2. A negative pressure railway tank car top unloading crane pipe sealing device according to claim 1, characterized in that: A sealing sleeve (13) is arranged between the two silicone flanges (14), and a lightweight and highly elastic material is used to fill the space between the sealing sleeve (13) and the crane body (12), thereby ensuring tight contact between the sealing sleeve (13) and the crane body (12); The silicone flange (14) and the crane pipe body (12) are sealed by oil-resistant material to ensure the sealing performance between the silicone flange (14) and the crane pipe body (12).

3. The negative pressure railway tank car top unloading crane pipe sealing device according to claim 1 is characterized in that: Angle steels distributed in a circular array are installed at the lower end of the outer wall of one side of the crane pipe body (12), and a metal flange is welded to the outer wall of the upper end of the angle steel. The metal flange is connected to the silicone flange (14), thereby ensuring the position stability of the silicone flange (14).

4. The negative pressure railway tank car top unloading crane pipe sealing device according to claim 1 is characterized in that: A breathing tube (21) is inserted and installed on one side of the outer wall of the upper end of the sealing flange (2), and an automatic air intake valve (22) is installed on one side of the outer wall of the upper end of the breathing tube (21). The automatic air intake valve (22) can input gas into the tank mouth (11) and the inside of the tank body (1) through the breathing tube (21), thereby preventing negative pressure from being formed inside the tank body (1).

5. The top unloading crane pipe sealing device of a negative pressure railway tank car according to claim 1 is characterized in that: A tongue-shaped sealing device (34) is installed on the outer wall of one side of the sealing cover plate (3), and an elastic sealing device (35) is installed on the outer wall of one side of the tongue-shaped sealing device (34), and the elastic sealing device (35) is capable of contacting the inner wall of the tank mouth (11), and the sealing performance between the sealing cover plate (3) and the tank mouth (11) can be ensured by the tongue-shaped sealing device (34) and the elastic sealing device (35).

6. The negative pressure railway tank car top unloading crane pipe sealing device according to claim 1 is characterized in that: The two bladder-type sealing devices (24) form a complete circle. The bladder-type sealing devices (24) are wrapped around the sealing sleeve (13). The elasticity of the bladder-type sealing devices (24) can seal the gap caused by the non-vertical position of the crane tube body (12).

7. The top unloading crane pipe sealing device of a negative pressure railway tank car according to claim 1 is characterized in that: A light hole (31) is provided on one side of the outer wall of the upper end of the sealing cover plate (3), and organic glass is embedded and installed inside the light hole (31). External bright light can penetrate the light hole (31) and illuminate the inside of the tank body (1), so that the brightness inside the tank body (1) can be adjusted.

8. The top unloading crane pipe sealing device of a negative pressure railway tank car according to claim 1 is characterized in that: A viewing window (32) is inserted and installed on one side of the outer wall of the upper end of the sealing cover plate (3), and organic glass is embedded and installed on one side of the inner wall of the viewing window (32), so that the staff can observe the changes in the liquid level inside the tank body (1) through the organic glass.

Images