Limiting device of tank box valve box door

Abstract

The utility model discloses a limiting device of a tank box valve box door. The limiting device comprises a stopping head, a stopping seat, a buffering cushion and a screw. The stop head comprises a linear head end and a connecting rod, and a threaded hole is formed in the end of the connecting rod. The stop seat comprises a bottom plate and a connecting column, a through hole is formed in the connecting column, the through hole comprises an upper small-aperture section and a bottom large-aperture section which are coaxial, and an annular table is arranged between the small-aperture section and the large-aperture section; the connecting rod can be cooperatively inserted into the small-aperture section; the screw can extend from the large-aperture section and is matched and screwed with the connecting rod; the stop head can rotate relative to the stop seat; the buffer pad is arranged between the linear head end and the upper end surface of the connecting column; after the box door of the valve box is turned upwards and opened, the stop head can penetrate through the hole in the box door, and the stop head is screwed to limit the box door from falling downwards to limit the box door. The limiting device is stable and reliable in limiting effect.

Description

Technical Field

[0001] The utility model relates to a limiting device for a tank box valve door. Background Art

[0002] Tank container is a form of container, including a box body and a frame, suitable for road, rail and water transport. Tank container is used to transport various types of liquid goods, such as industrial liquids, food liquids and chemical liquids. Some of these goods, such as asphalt and liquid sulfur, have a high melting point, while other goods, such as liquid carbon dioxide, have a high vaporization temperature. Tanks for transporting the above media are equipped with insulation devices to reduce the heat loss of the media during transportation. Tank containers are usually equipped with a bottom discharge valve at the lower end of one end of the head. Some low-temperature tank containers are also equipped with inlet and outlet liquid pipelines, venting pipelines, gas phase pipelines, etc. In order to protect the valve from being accidentally opened and to prevent theft of the medium in the tank, a valve box or bottom discharge box is generally set within a reasonable range outside the tank valve. Such valve boxes or bottom discharge boxes are generally opened left and right or up and down, and are also equipped with accessories such as box covers and box locks. When operators use tank containers, they need to open the valve box for loading and unloading operations. During the operation, they need to have as much operating space as possible, so the opened door is generally limited or fixed to prevent the door from accidentally falling or moving during the operation. In the prior art, the limiting or fixing of the door has problems such as loose fixing, and for tank containers with insulation layers, it is impossible to use welded limiting parts for limiting or fixing. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a limiting device for a tank box valve door, which overcomes the problems that the door of the existing valve box is not firmly limited or fixed, and cannot be limited or fixed by welding limiting parts.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A limiting device for a tank box valve door, the valve box is arranged at the end frame of the tank box frame, and the door of the valve box can be flipped upward to open; the limiting device includes a stopper head, a stopper seat, a buffer pad, and a screw;

[0006] The stopper head comprises a straight head end and a connecting rod, one end of the connecting rod is fixedly connected to the middle part of the bottom surface of the straight head end, and the other end of the connecting rod is provided with a threaded hole;

[0007] The stop seat comprises a bottom plate and a connecting column, a through hole is provided in the connecting column, and the lower end of the connecting column is fixedly connected to the center of the bottom plate as a whole; the through hole of the connecting column comprises a coaxial upper small-diameter section and a bottom large-diameter section, and an annular platform is provided between the small-diameter section and the large-diameter section; the connecting rod of the stop head can be inserted into the small-diameter section; the screw can extend from the large-diameter section and be screwed with the threaded hole of the connecting rod; the stop head can rotate relative to the stop seat, and the screw is screwed with the connecting rod of the stop head so that the straight-shaped head end of the stop head is close to the upper end surface of the stop seat connecting column;

[0008] The buffer pad is arranged between the I-shaped head end and the upper end surface of the connecting column.

[0009] The utility model also includes the following technical features:

[0010] Specifically, the box door is provided with a straight-line through hole, the size of which is slightly larger than the end face size of the straight-line head end, so that the straight-line head end can pass through the straight-line through hole; the diameter of the upper end face of the connecting column of the stop seat is larger than the width of the straight-line through hole, so that when the straight-line head end passes through the straight-line through hole and rotates, the box door can be limited between the buffer pad on the upper end face of the straight-line head end and the connecting column of the stop seat.

[0011] Specifically, the bottom plate of the stopper is fixed on the limit fixing plate by rivets, and the limit fixing plate is welded to the skin support plate on the tank container head and the edge of the manhole protection cover.

[0012] Specifically, when the box door is flipped upward to open, the straight through hole on the box door is directly opposite to the stopper head.

[0013] Specifically, the central axis of the through hole on the stop seat is inclined toward the top side of the bottom plate, so that the stop head connected to the stop seat is inclined toward the top to match the inclined state when the box door is flipped up and opened.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] The limit device of the tank valve door of the utility model includes a stopper head, a stopper seat, a buffer pad, a fixed plate combination, etc. The stopper head passes through the opening at the corresponding position of the valve door and rotates the direction of the stopper head. Since the stopper head and the door opening form a "cross" shape, the door is restricted and cannot be turned down, so the door remains open. Unless the stopper head is manually rotated, the door cannot be separated from the stopper head, thereby ensuring that the door always remains in the maximum open state, which is convenient for operators to perform loading and unloading operations at one end of the valve box. Compared with the above-mentioned existing technologies, the limiter effect is more stable and reliable.

[0016] The limit function of the utility model is realized by the cooperation between the limit device and the valve box door opening, and its adjustability and fault tolerance are higher. The size of the fixing plate can be adjusted according to the position of the valve box door opening, or the valve box door opening can be appropriately expanded after the position of the limit device is installed.

[0017] The utility model is suitable for heat-insulating tank containers. The device and the heat-insulating end frame are fixed by riveting instead of welding, which does not affect the use of the heat-insulating skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the limit device;

[0019] Figure 2 is a cross-sectional view of the limiting device;

[0020] Figure 3 This is a schematic diagram of the fixing of the limit device;

[0021] Figure 4 This is a cross-sectional view of the limit device when in use;

[0022] Figure 5 This is a schematic diagram of the end of the insulation tank box;

[0023] Figure 6 It is a partial schematic diagram of the limit device when in use.

[0024] The meaning of each number in the figure is:

[0025] 1. Stop head, 2. Stop seat, 3. Buffer pad, 4. Screw, 5. Limiting gasket, 6. Limiting fixing plate, 7. Box door, 8. Skin support plate, 9. Manhole protection cover, 10. Insulation skin; 11. I-shaped head end, 12. Connecting rod, 21. Bottom plate, 22. Connecting column, 221. Small aperture section, 222. Large aperture section, 223. Ring platform, 71. I-shaped through hole. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of the present application fall within the protection scope of the present invention.

[0027] Embodiment 1:

[0028] like Figures 1 to 6 As shown, this embodiment provides a limit device for a tank box valve door. The valve box is arranged at the end frame of the tank box frame, and the door 7 of the valve box can be flipped upward to open; the limit device includes a stop head 1, a stop seat 2, a buffer pad 3, and a screw 4.

[0029] The stopper head 1 comprises a straight head end 11 and a connecting rod 12. One end of the connecting rod 12 is fixedly connected to the middle of the bottom surface of the straight head end 11, and the other end of the connecting rod is provided with a threaded hole.

[0030] The stop seat 2 includes a base plate 21 and a connecting column 22, a through hole is provided in the connecting column 22, and the lower end of the connecting column 22 is fixedly connected to the center of the base plate 21 as a whole; the through hole of the connecting column 22 includes a coaxial upper small-diameter section 221 and a bottom large-diameter section 222, and an annular platform 223 is provided between the small-diameter section 221 and the large-diameter section 222; the connecting rod 12 of the stop head 1 can be inserted into the small-diameter section 221; the screw 4 can extend from the large-diameter section 222 and be screwed together with the threaded hole of the connecting rod 12; the stop head 1 can rotate relative to the stop seat 2, and the screw 4 is screwed together with the connecting rod 12 of the stop head 1 so that the I-shaped head end 11 of the stop head 1 is close to the upper end surface of the connecting column 22 of the stop seat 2.

[0031] The buffer pad 3 is arranged between the I-shaped head end 11 and the upper end surface of the connecting column 22 .

[0032] A straight through hole 71 is provided on the box door 7, and the size of the straight through hole 71 is slightly larger than the end face size of the straight head end 11, so that the straight head end 11 can pass through the straight through hole 71; the diameter of the upper end face of the connecting column 22 of the stop seat 2 is larger than the width of the straight through hole 71, so that when the straight head end 11 passes through the straight through hole 71 and rotates, the box door 7 can be limited between the straight head end 11 and the buffer pad 3 on the upper end face of the connecting column 22 of the stop seat 2.

[0033] The bottom plate 21 of the stopper seat 2 is fixed on the limit fixing plate 6 by rivets, and the limit fixing plate 6 is welded to the skin support plate 8 and the edge of the manhole protection cover 9 on the tank container head.

[0034] When the box door 7 is flipped upward and opened, the straight through hole 71 on the box door 7 is directly opposite to the stopper head 1 .

[0035] The central axis of the through hole on the stopper seat 2 is inclined toward the top side of the bottom plate 21, so that the stopper head 1 connected to the stopper seat 2 is inclined toward the top to match the inclined state when the door 7 is flipped up and opened. Figure 2 As shown, the angle between the central axis of the through hole and the top of the bottom plate is an acute angle α.

[0036] In this embodiment, the nut diameter of the screw 4 is larger than the diameter of the small aperture section 221 and slightly smaller than the diameter of the large aperture section 222, thereby limiting the screw in the stop seat 2 to prevent it from axially sliding, and a self-tapping screw is specifically selected.

[0037] In other embodiments, when the diameter of the nut of the screw 4 is not greater than the diameter of the small aperture section 221, the limiting device may further include a limiting gasket 5, which is arranged between the nut of the screw 4 and the annular platform 223 for limiting, and after being screwed to the stop head 1, prevents the stop head 1 and the screw 4 from sliding out from the direction of the stop head 1.

[0038] Specifically, the stopper head and the stopper seat can be made of metal or non-metal. The buffer pad between the stopper head and the stopper seat is preferably made of rubber material. In this embodiment, the buffer pad is made of EPDM, the stopper head and the stopper seat are made of stainless steel, the periphery of the I-shaped head end is chamfered, and the depth of the threaded hole matches the selected screw.

[0039] The manhole protection cover is a cylindrical flanged shape. The edge of the manhole protection cover, the skin support, and the limit fixing plate are connected by welding, so that the flange of the manhole protection cover, the skin support plate and the limit fixing plate are in the same plane; after the thermal insulation skin is installed, the overall assembled limit device is riveted to the thermal insulation skin and the limit fixing plate through the stop seat; the device is fixed to the thermal insulation end frame by riveting instead of welding, which does not affect the use of the thermal insulation skin. The corresponding end of the lower part of the valve box door opens a vertical long strip hole, and the initial position of the stop head of the corresponding limit device is vertical.

[0040] During operation, open the valve box door, make the opening of the valve box door pass through the stop head, then twist the stop head and rotate it 90° from its initial position, so that the stop head blocks the valve box door horizontally or vertically, restricting the tendency of the valve box door to fall downward, thereby playing the role of limiting the position of the valve box door. When closing the valve box, rotate the stop head another 90° so that the opening of the door is in the same direction as the stop head, and the door can be withdrawn from the limit position of the stop head to release the lock of the stop head.

[0041] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0042] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0043] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A limiting device for a valve box door of a tank box, wherein the valve box is arranged at an end frame of a tank box frame, and the door (7) of the valve box can be flipped upward and opened; characterized in that: The limiting device comprises a stopper head (1), a stopper seat (2), a buffer pad (3), and a screw (4); The stopper head (1) comprises a straight-line head end (11) and a connecting rod (12), one end of the connecting rod (12) is integrally connected to the middle of the bottom surface of the straight-line head end (11), and the other end of the connecting rod is provided with a threaded hole; The stop seat (2) comprises a base plate (21) and a connecting column (22), a through hole is provided in the connecting column (22), and the lower end of the connecting column (22) is fixedly connected to the base plate (21) as a whole; the through hole of the connecting column (22) comprises a coaxial upper small-diameter section (221) and a bottom large-diameter section (222), and an annular platform (223) is provided between the small-diameter section (221) and the large-diameter section (222); the connecting rod (12) of the stop head (1) can be inserted into the small-diameter section (221); the screw (4) can extend from the large-diameter section (222) and be screwed with the threaded hole of the connecting rod (12); the stop head (1) can rotate relative to the stop seat (2), and the screw (4) is screwed with the connecting rod (12) of the stop head (1) so that the straight-shaped head end (11) of the stop head (1) is close to the upper end surface of the connecting column (22) of the stop seat (2); The buffer pad (3) is arranged between the straight-line head end (11) and the upper end surface of the connecting column (22).

2. The limiting device for the tank container valve door according to claim 1, characterized in that: The box door (7) is provided with a straight-line through hole (71), the size of which is slightly larger than the end face size of the straight-line head end (11), so that the straight-line head end (11) can pass through the straight-line through hole (71); the diameter of the upper end face of the connecting column (22) of the stopper seat (2) is larger than the width of the straight-line through hole (71), so that when the straight-line head end (11) passes through the straight-line through hole (71) and rotates, the box door (7) can be limited between the straight-line head end (11) and the buffer pad (3) on the upper end face of the connecting column (22) of the stopper seat (2).

3. The limiting device for the tank container valve door according to claim 1, characterized in that: The bottom plate (21) of the stop seat (2) is fixed on the limit fixing plate (6) by rivets, and the limit fixing plate (6) is welded to the skin support plate (8) on the tank container head and the edge of the manhole protection cover (9).

4. The limiting device for the tank container valve door according to claim 2, characterized in that: When the box door (7) is turned upward and opened, the straight through hole (71) on the box door (7) faces the stopper head (1).

5. The limiting device for the tank container valve door according to claim 2, characterized in that: The central axis of the through hole on the stop seat (2) is inclined toward the top side of the bottom plate (21), so that the stop head (1) connected to the stop seat (2) is inclined toward the top to match the inclined state when the box door (7) is flipped up and opened.

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