Tank container and valve protection box thereof

Abstract

The utility model relates to a tank container and a valve protection box thereof. The valve protection box comprises a box body, a box cover and a limiting hinge. The box cover is hinged to the box body through a limiting hinge. The limiting hinge comprises a first hinge body and a second hinge body which are hinged to each other, and a hinge shaft used for connecting the first hinge body and the second hinge body, and the first hinge body and the second hinge body are arranged on the box body and the box cover respectively. When the box cover is opened, the first chain body and the second chain body can relatively move in the axial direction of the hinge shaft to interfere with each other, so that the box cover cannot rotate around the hinge shaft and is kept at the opening position. And the box cover can be kept at the opening position through the limiting hinge, so that the valve protection box is more convenient to use. Due to the fact that the box cover is kept at the opening position through the structure of the limiting hinge, the structure of the valve protection box is simpler, no extra supporting or fixing structure needs to be arranged to enable the box cover to be kept at the opening position, and more materials are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of containers, in particular to a tank container and a valve protection box thereof. Background Art

[0002] Tank containers are special containers commonly used to transport liquid goods such as food, medicine, chemicals, etc. Tank containers mainly include a tank body for loading materials and a frame for supporting the tank body.

[0003] Usually, pipes and valves for the entry and exit of materials are arranged at the bottom of one end of the tank body, and a protection box for the user to protect the valve is arranged on the outside of the valve. The protection box can increase the safety of tank container transportation.

[0004] The current protection box is usually a box structure with a lid. A hinge is welded on the top of the box body, and the box cover is hinged to the box body through the hinge. The hinge is usually a shaft + shaft sleeve structure. After the box cover is opened, it is fixed by a fixing device such as a chain, or a supporting device such as a support rod. Since additional structures such as chains or support rods are required to fix the box cover in the open state, the structure of the protection box is more complicated and inconvenient to use. Utility Model Content

[0005] One purpose of the utility model is to solve the deficiencies in the prior art and provide a valve protection box with a simple structure and convenient use. To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A valve protection box for protecting valves of a tank container, comprising:

[0007] The box body is arranged at the valve part of the tank container, and the box body is provided with an operation port;

[0008] A box cover is hinged to one side of the box body and covers the operation opening so as to open or close the operation opening; and

[0009] A limit hinge connects the box body and the box cover, and the box cover is hinged to the box body through the limit hinge;

[0010] The limit hinge includes a first chain body and a second chain body hinged to each other, and a hinge shaft for connecting the first chain body and the second chain body, and the first chain body and the second chain body are respectively arranged on the box body and the box cover;

[0011] When the box cover is at the position of opening the operation port, the first chain body and the second chain body can move relatively along the axial direction of the hinge shaft and interfere with each other, so that the box cover cannot rotate around the hinge shaft and remains at the position of opening the operation port.

[0012] In one embodiment, the first chain body is installed on the box body and is provided with a limiting portion. The second chain body is provided with an abutting portion corresponding to the limiting portion. The abutting portion can move to a position abutting against the limiting portion to prevent the second chain body from rotating around the hinge axis, so that the box cover remains in the position of opening the operating port.

[0013] In one embodiment, the first chain body includes a mounting seat, and a first lug and a second lug protruding from the same side of the mounting seat, the mounting seat is used to be mounted on the box body, the first lug and the second lug are relatively spaced and used to pass the hinge shaft;

[0014] The limiting part is a limiting plate connected to the first lug, and a limiting groove is formed between the limiting plate and the mounting seat for the second chain body to move along the axial direction of the hinge shaft;

[0015] When the box cover is in the position of opening the operation port, the second chain body can move in the limiting groove to the position where the abutting portion abuts against the limiting plate.

[0016] In one embodiment, the second chain body includes a mounting plate and a connecting plate connected to each other, the mounting plate is used to be fixedly connected to the box cover, and the connecting plate is used to pass the hinge shaft;

[0017] When the box cover is in the position of opening the operation port, the connecting plate can move in the limiting groove to abut against the limiting plate on one side thereof, and the connecting plate is used to form an abutting portion with the side abutting against the limiting plate.

[0018] In one embodiment, a clearance opening is formed between the limiting plate and the second lug for the second chain body to rotate around the hinge axis, and the second chain body can rotate around the hinge axis through the clearance opening.

[0019] In one embodiment, the mounting seat is relatively fixedly mounted on the box body, and when the box cover is in a position to open the operation port, the box cover is moved by external force so that the second chain body can move in the limiting groove.

[0020] In one embodiment, the mounting seat is movably mounted on the box body, and when the box cover is in a position to open the operation port, the mounting seat is moved by external force so that the second chain body can move in the limiting groove.

[0021] In one embodiment, the first chain body includes a first sleeve, one end of the first sleeve partially protrudes to form a first convex block, and the limiting portion is a first step surface formed between the first convex block and the first sleeve;

[0022] The second chain body comprises a second sleeve, one end of the second sleeve partially protrudes to form a second convex block, and the abutting portion is a second step surface formed between the second convex block and the second sleeve;

[0023] When the box cover is in a position to open the operation opening, the second step surface can move to a position in contact with the first step surface.

[0024] In one embodiment, when the first chain body and the second chain body interfere with each other to keep the box cover at the position of opening the operation opening, the opening angle of the box cover is 180°.

[0025] Another object of the utility model is to provide a tank container, comprising a tank body and a frame supporting the tank body, and a valve protection box as described in any one of the above items, wherein the box body is fixedly connected to the frame.

[0026] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0027] In the utility model, the valve protection box includes a box body, a box cover and a limit hinge. The box cover is hinged to the box body through the limit hinge. Since the limit hinge includes a first chain body and a second chain body, and the first chain body and the second chain body can move relative to each other when the box cover is opened, and interfere with each other, the box cover cannot rotate. Therefore, the box cover can be kept in the open position, making the valve protection box more convenient to use.

[0028] Since the box cover is kept in the open position by the structure of the limit hinge itself, the structure of the valve protection box is simpler, and no additional support or fixing structure is required to keep the box cover in the open position, which saves more materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a valve protection box according to an embodiment of the utility model.

[0030] Figure 2 yes Figure 1 The structure diagram of the valve protection box shown is when the box cover is kept open.

[0031] Figure 3 yes Figure 1 An enlarged schematic diagram of point A in the structure shown.

[0032] Figure 4 yes Figure 2 An enlarged schematic diagram of point B in the structure shown.

[0033] Figure 5 yes Figure 3 Schematic diagram of the structure of the first chain in the structure shown.

[0034] Figure 6 It is a structural schematic diagram of a valve protection box according to another embodiment of the utility model.

[0035] Figure 7 yes Figure 6 An enlarged schematic diagram of point C in the structure shown.

[0036] Figure 8It is a structural schematic diagram of a valve protection box in another embodiment of the utility model.

[0037] Fig. 9 yes Figure 8 An enlarged schematic diagram of point D in the structure shown.

[0038] Fig.10 yes Figure 8 The structure diagram of the valve protection box shown is when the box cover is kept open.

[0039] Fig.11 yes Fig.10 An enlarged schematic diagram of point E in the structure shown.

[0040] The following are the descriptions of the reference numerals:

[0041] 10-tank container; 20-protection box;

[0042] 100-box body; 110-operation port;

[0043] 200-box cover;

[0044] 300-limited hinge;

[0045] 310-first chain body; 311-limiting portion; 312-mounting seat; 3121-long strip hole;

[0046] 313-first lug; 314-second lug; 315-limiting groove; 316-avoidance opening;

[0047] 317 - first sleeve; 318 - first protrusion; 319 - first step surface;

[0048] 320 - second chain body; 321 - abutment portion; 322 - mounting plate; 323 - connecting plate;

[0049] 324 - second sleeve; 325 - second protrusion; 326 - second step surface;

[0050] 330 - articulated shaft. DETAILED DESCRIPTION

[0051] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0052] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] The valve protection box 20 of the utility model is mainly used in a tank container, such as a tank container 10. The valve protection box 20 is used to protect the valves on the tank body, thereby increasing the safety of the tank container during transportation.

[0055] See also Figure 1 and Figure 2 As shown, the valve protection box 20 of the embodiment of the utility model is used to protect the valves of the tank container 10. The tank container 10 carries mostly dangerous chemical media, which are flammable, explosive, toxic, harmful, and highly corrosive. The most likely part of the tank container 10 to cause leakage is the valve. The valve includes a loading and unloading valve for unloading materials from the tank or adding materials to the tank, a functional valve for detecting various data of the tank, etc.

[0056] The tank container 10 generally includes a tank body and a frame supporting the tank body. The valve member is generally arranged on the tank body of the tank container 10. For example, the valve member may be located at one side of the bottom of the tank body.

[0057] See also Figure 1 and Figure 2 The valve protection box 20 according to the embodiment of the utility model comprises a box body 100, a box cover 200 and a limit hinge 300. The box body 100 is arranged at the valve of the tank container 10, and the box body 100 is provided with an operation port 110.

[0058] like Figure 2 As shown, the box body 100 may include a top plate and two side plates arranged at both ends of the top plate. The top end of each side plate is fixedly connected to the top plate, and the bottom end may be fixedly connected to the frame at the bottom of the tank container 10.

[0059] The top plate and the side plates may be fixedly connected by welding. Alternatively, the top plate and the side plates may be detachably fixedly connected by fasteners such as bolts.

[0060] The side panels and the frame can be fixedly connected by welding. Alternatively, the side panels and the frame can be detachably fixedly connected by fasteners such as bolts.

[0061] like Figure 2 As shown, the top plate, the two side plates and the frame form a shell structure with two openings, one of which is an operation port 110 and the other is a mounting port. The box body 100 can be mounted outside the valve member through a mounting cover.

[0062] In other embodiments, the box body 100 may further include a bottom plate. The bottom plate may be connected to the bottom ends of the two side plates. The bottom plate may be fixedly connected to a frame at the bottom of the tank container 10.

[0063] like Figure 2 As shown, the box cover 200 is hinged to one side of the box body 100, and is covered at the operation opening 110 so as to open or close the operation opening 110. Specifically, the box cover 200 can be hinged on the side of the top plate. Thereby the operator can flip the box cover 200 upwards to open the operation opening 110 or flip the box cover 200 downwards to close the operation opening 110.

[0064] In other embodiments, the box cover 200 may also be hinged to the side edge of the side plate of the box body 100. Alternatively, the box cover 200 may also be hinged to the side edge of the bottom plate of the box body 100.

[0065] The limit hinge 300 is used to connect the box body 100 and the box cover 200 to achieve a hinged connection between the box body 100 and the box cover 200. Figure 1 As shown, there may be two limit hinges 300 , and the two limit hinges 300 are evenly distributed between the side edge of the top of the box body 100 and the box cover 200 .

[0066] In other embodiments, one or more limit hinges 300 may be provided to connect the box body 100 and the box cover 200 according to the size of the valve protection box 20 .

[0067] See also Figure 3 The position-limiting hinge 300 includes a first link body 310 and a second link body 320 that are hinged to each other, and a hinge shaft 330 for connecting the first link body 310 and the second link body 320. The first link body 310 and the second link body 320 are respectively arranged on the box body 100 and the box cover 200.

[0068] It can be understood that the first chain body 310 can be disposed on the box body 100 . The second chain body 320 can be disposed on the box cover 200 corresponding to the first chain body 310 .

[0069] Alternatively, the positions of the first chain body 310 and the second chain body 320 may also be interchanged, that is, the first chain body 310 may be disposed on the box cover 200 , and the second chain body 320 may be disposed on the box body 100 .

[0070] The box cover 200 is hinged to the box body 100 through the limit hinge 300. When the box cover 200 is in the position of opening the operation port 110, the first chain body 310 and the second chain body 320 can move relative to each other along the axial direction of the hinge shaft 330 and interfere with each other, so that the box cover 200 cannot rotate around the hinge shaft 330 and remains in the position of opening the operation port 110.

[0071] See also Figure 2 In one embodiment, when the first chain body 310 and the second chain body 320 interfere with each other to keep the box cover 200 at the position of opening the operation opening 110, the opening angle of the box cover 200 is 180°. In this embodiment, when the limit hinge 300 keeps the box cover 200 open, the opening angle of the box cover 200 is set to 180°, and the box cover 200 can be flush with the plane where the operation opening 110 of the box body 100 is located. Therefore, when the box cover 200 is opened, it will not occupy too much vertical space, avoiding the box cover 200 from touching and interfering with other parts of the tank container, and at the same time facilitating the operation of the operator.

[0072] Of course, in other embodiments, the opening angle of the box cover 200 can be any angle within a certain range, as long as the position of the box cover 200 when it is opened does not hinder the operator's operation, and the box cover 200 does not touch or interfere with the components of the tank container behind. For example, the opening angle of the box cover 200 can be any angle between 160° and 200°.

[0073] In the valve protection box 20 of the embodiment of the present application, the box cover 200 is hinged to the box body 100 through the limit hinge 300. Since the limit hinge 300 includes a first chain body 310 and a second chain body 320, and the first chain body 310 and the second chain body 320 can move relative to each other and interfere with each other when the box cover 200 is opened, the box cover 200 cannot rotate. Thus, the box cover 200 can be kept in the position of opening the operating port 110, which is convenient for the operator to operate. Since the box cover 200 is kept in the open position by the structure of the limit hinge 300 itself, the structure of the valve protection box 20 is simpler, and it does not need to set an additional support or fixing structure to keep the box cover 200 in the open position.

[0074] See also Figure 4As shown, in one embodiment, the first chain body 310 and the second chain body 320 may interfere with each other due to their axial relative movement along the hinge shaft 330 as follows: a limiting portion 311 is provided on the first chain body 310, and an abutting portion 321 is provided on the second chain body 320 corresponding to the limiting portion 311, and the abutting portion 321 can move to a position abutting against the limiting portion 311 to prevent the second chain body 320 from rotating around the hinge shaft 330, so that the box cover 200 remains in the position of opening the operating port 110.

[0075] Combination Figure 3 and Figure 5 As shown, the first chain body 310 may include a mounting seat 312 , and a first lug 313 and a second lug 314 protruding from the same side of the mounting seat 312 .

[0076] The mounting seat 312 is used to be mounted on the box body 100. In the present application, the mounting seat 312 can be detachably mounted on the box body 100 using fasteners such as bolts. Alternatively, the mounting seat 312 can also be welded to the box body 100. Alternatively, the mounting seat 312 can also be movably connected to the box body 100.

[0077] The first lug 313 and the second lug 314 are arranged relatively spaced apart and are used to pass the hinge shaft 330. Specifically, the first lug 313 may be provided with a first shaft hole for passing one end of the hinge shaft 330. The second lug 314 may be provided with a second shaft hole for passing the other end of the hinge shaft 330.

[0078] The limiting portion 311 is a limiting plate connected to the first lug 313, and a limiting groove 315 is formed between the limiting plate and the mounting seat 312 for the second chain body 320 to move along the axial direction of the hinge shaft 330. When the box cover 200 is in the position of opening the operation port 110, the second chain body 320 can move in the limiting groove 315 to the position where the abutting portion 321 abuts against the limiting plate. Figure 4 As shown, when the second chain body 320 moves to the position where the contact portion 321 contacts the limit plate, one side of the second chain body 320 is stopped by the limit plate, and the other side is stopped by the mounting seat 312. At this time, the second chain body 320 cannot rotate around the hinge shaft 330, so that the box cover 200 cannot rotate around the hinge shaft 330 and remains in the current position of opening the operation port 110.

[0079] It is understandable that when the box cover 200 needs to be closed, the second chain body 320 is moved in the limit groove 315 in the opposite direction until the abutment portion 321 is separated from the stop of the limit plate. At this time, the box cover 200 can rotate normally around the hinge shaft 330 to close the operation port 110.

[0080] like Figure 5As shown, an escape opening 316 for the second chain body 320 to rotate around the hinge shaft 330 is formed between the limiting plate and the second lug 314 , and the second chain body 320 can rotate around the hinge shaft 330 through the escape opening 316 .

[0081] See also Figure 3 As shown, the second chain body 320 includes a mounting plate 322 and a connecting plate 323 connected to each other. The mounting plate 322 is used to be fixedly connected to the box cover 200, for example, the mounting plate 322 can be connected to the box cover 200 by welding.

[0082] The connecting plate 323 is used to pass through the hinge shaft 330. The connecting plate 323 is connected to one side of the mounting plate 322 and protrudes from the surface of the connecting plate 323. Specifically, the mounting plate 322 and the connecting plate 323 can be connected perpendicularly to each other, and the two can form an L-shaped second chain body 320.

[0083] When the box cover 200 is in the position of opening the operation port 110, the connecting plate 323 can move in the limiting groove 315 to abut against the limiting plate on one side, and the connecting plate 323 is used to form abutting portion 321 against the side of the limiting plate. Figure 4 As shown, when the box cover 200 is opened and the connecting plate 323 is moved to the side thereof against the limit plate, one side of the connecting plate 323 is stopped by the limit plate and the other side is stopped by the mounting seat 312. At this time, the connecting plate 323 cannot rotate around the hinge shaft 330, and thus the second chain body 320 cannot rotate around the hinge shaft 330, so that the box cover 200 can be maintained at the current position of opening the operation port 110.

[0084] It is understandable that when the box cover 200 needs to be closed, the connecting plate 323 is moved in the opposite direction in the limiting groove 315 to be out of the stopper of the limiting plate. At this time, the box cover 200 can rotate normally around the hinge shaft 330 to close the operation port 110.

[0085] See also Figure 3 and Figure 4 In one embodiment, the mounting seat 312 is relatively fixedly mounted on the box body 100. When the box cover 200 is in the position of opening the operation port 110, the box cover 200 is moved by external force so that the second chain body 320 can move in the limiting groove 315. In this embodiment, the mounting seat 312 can be detachably fixedly mounted on the box body 100 by fasteners such as bolts. When the box cover 200 is opened and the box cover 200 needs to be fixed at the current position, the second chain body 320 is moved relative to the mounting seat 312 by moving the box cover 200 until one side of the connecting plate 323 of the second chain body 320 (i.e., the abutting portion 321) abuts against the limiting plate.

[0086] See also Figure 6 and Figure 7In another embodiment, the mounting seat 312 is movably mounted on the box body 100. When the box cover 200 is in the position of opening the operation port 110, the mounting seat 312 is moved by external force so that the second chain body 320 can move in the limiting groove 315. In this embodiment, when the box cover 200 is opened and needs to be fixed at the current position, the mounting seat 312 is moved to move the limiting plate to a position where it abuts against the abutting portion 321 of the second chain body 320, so that the box cover 200 can be fixed at the current position of opening the operation port 110.

[0087] like Figure 7 As shown, in one embodiment, the mounting seat 312 may be provided with an elongated hole 3121 extending along the axial direction of the hinge shaft 330. A fastener such as a bolt is passed through the elongated hole 3121 and connected to the box body 100. The bolt and the elongated hole 3121 can ensure the connection between the mounting seat 312 and the box body 100, and at the same time, the mounting seat 312 can be moved along the axial direction of the hinge shaft 330 to achieve the limited fixation of the box cover 200 in the open position.

[0088] See also Figures 8 to 11 In another possible embodiment of the present application, the first chain body 310 includes a first sleeve 317, one end of the first sleeve 317 partially protrudes to form a first protrusion 318, and the limiting portion 311 is a first step surface 319 formed between the first protrusion 318 and the first sleeve 317.

[0089] The second chain body 320 includes a second sleeve 324 . One end of the second sleeve 324 partially protrudes to form a second convex block 325 . The abutting portion 321 is a second step surface 326 formed between the second convex block 325 and the second sleeve 324 .

[0090] When the box cover 200 is in the position of opening the operation opening 110, the second step surface 326 can be moved to a position in contact with the first step surface 319. In this embodiment, when the box cover 200 is opened and needs to be fixed at the current position, the first step surface 319 and the second step surface 326 are in contact with each other by moving the box cover 200. At this time, the first chain body 310 can limit the rotation of the second chain body 320, so that the second chain body 320 cannot rotate around the hinge shaft 330, so that the box cover 200 can be maintained at the current position of opening the operation opening 110.

[0091] It is understandable that when the box cover 200 needs to be closed, the box cover 200 is moved in the opposite direction until the second step surface 326 is separated from the stop of the first step surface 319 , and the box cover 200 can rotate around the hinge shaft 330 normally to close the operation port 110 .

[0092] like Fig. 9As shown, in this embodiment, the first chain body 310 and the second chain body 320 may have the same structure. That is, the first chain body 310 and the second chain body 320 may both have a structure with a sleeve at one end and a protrusion at the other end.

[0093] In the embodiment of the present application, a limiting portion 311 is provided on the first chain body 310, and the limiting portion 311 may have a limiting surface (such as the side of the limiting plate facing the mounting seat 312, or the first step surface 319). The limiting surface can stop the rotation of the second chain body 320 to prevent the box cover 200 from rotating toward the position of closing the operation port 110.

[0094] The second link body 320 is provided with an abutting portion 321 corresponding to the limiting portion 311, and the abutting portion 321 may have an abutting surface (such as a side surface of the aforementioned connecting plate 323, or the second step surface 326). The abutting surface is used to abut and cooperate with the limiting surface to achieve the purpose of mutual interference between the first hinge 310 and the second hinge 320, so that the box cover 200 can be kept at the position of opening the operating port 110.

[0095] In other embodiments, the first link body 310 and the second link body 320 may be provided with mutually cooperating fixing structures, such as buckles, etc. Specifically, a card slot may be provided on the first link body 310. A card convex may be provided on the second link body 320. When the box cover 200 is opened, the first link body 310 and the second link body 320 may move relative to each other along the axial direction of the hinge shaft 330 until the card convex is locked in the card slot. At this time, the first link body 310 and the second link body 320 interfere with each other because the card convex is locked in the card slot, so that the box cover 200 cannot rotate.

[0096] See also Figure 1 and Figure 2 In one embodiment, the box body 100 and the box cover 200 may be provided with corresponding structures for locking the box cover 200 when the box cover 200 is closed, thereby effectively preventing the box cover 200 from being opened by mistake. Figure 1 As shown, a rotatable buckle is provided on the box body 100, and a fixing plate is provided on the box cover 200 corresponding to the buckle. When closing the box cover 200, the buckle is rotated to be snapped onto the fixing plate. At this time, the box cover 200 cannot be turned upward to open the operating port 110.

[0097] Alternatively, a first locking hole is provided on the side of the box cover 200, and a second locking hole is correspondingly provided on the box body 100. By using a locking pin that passes through the first locking hole and the second locking hole in sequence, the box cover 200 and the box body 100 can be locked and fixed when the box cover 200 is closed.

[0098] See also Figure 1As shown, an embodiment of the utility model further provides a tank container 10, comprising a tank body and a frame supporting the tank body, and a valve protection box 20 as described in any of the above embodiments. The box body 100 may be fixedly connected to the frame. Alternatively, the box body 100 may also be fixedly connected to both the frame and the tank body.

[0099] Optionally, when the valve protection box 20 is installed on the tank container 10, each surface thereof does not protrude from a corresponding surface of the frame. For example, when the box cover 200 is closed, the box cover 200 may not protrude from a surface of the frame.

[0100] It can be seen from the above technical solutions that the tank container 10 and the valve protection box 20 of the embodiment of the utility model have at least the following beneficial effects:

[0101] In the valve protection box 20 of the embodiment of the present application, the box cover 200 is hinged to the box body 100 through the limit hinge 300. Since the limit hinge 300 includes a first link body 310 and a second link body 320, and the first link body 310 and the second link body 320 can move relative to each other and interfere with each other when the box cover 200 is opened, the box cover 200 cannot rotate. Therefore, the box cover 200 can be kept in the position of opening the operation port 110, making the valve protection box 20 more convenient to use.

[0102] Since the box cover 200 is kept in the open position by the structure of the limit hinge 300 itself, the structure of the valve protection box 20 is simpler, and no additional support or fixing structure is required to keep the box cover 200 in the open position.

[0103] By providing structures for locking the box cover 200 when the box cover 200 is closed on the box body 100 and the box cover 200 respectively, the box cover 200 can be effectively prevented from being opened by mistake, thereby further improving the safety of the valve protection box 20.

[0104] The above embodiments are merely exemplary descriptions of the structures. The structures in the embodiments are not fixed combination structures. In the absence of structural conflicts, the structures in multiple embodiments can be used in any combination.

[0105] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A valve protection box for protecting valves of a tank container, characterized in that: include: A box body, arranged at the valve member of the tank container, and the box body is provided with an operation port; a box cover, hinged to one side of the box body and covering the operation opening so as to open or close the operation opening; and A limit hinge, which connects the box body and the box cover, and the box cover is hinged to the box body through the limit hinge; The limit hinge comprises a first chain body and a second chain body hinged to each other, and a hinge shaft for connecting the first chain body and the second chain body, wherein the first chain body and the second chain body are respectively arranged on the box body and the box cover; When the box cover is at the position of opening the operation port, the first chain body and the second chain body can move relative to each other along the axial direction of the hinge shaft and interfere with each other, so that the box cover cannot rotate around the hinge shaft and remains at the position of opening the operation port.

2. The valve protection box according to claim 1, characterized in that: The first chain body is installed on the box body and is provided with a limiting portion. The second chain body is provided with an abutting portion corresponding to the limiting portion. The abutting portion can move to a position abutting against the limiting portion to prevent the second chain body from rotating around the hinge axis, so that the box cover remains in a position to open the operating port.

3. The valve protection box according to claim 2, characterized in that: The first chain body comprises a mounting seat, and a first lug and a second lug protruding from the same side of the mounting seat, the mounting seat is used to be mounted on the box body, the first lug and the second lug are relatively spaced and used to pass through the hinge shaft; The limiting portion is a limiting plate connected to the first lug, and a limiting groove is formed between the limiting plate and the mounting seat for the second chain body to move along the axial direction of the hinge shaft; When the box cover is at a position to open the operation port, the second chain body can move in the limiting groove to a position where the abutting portion abuts against the limiting plate.

4. The valve protection box according to claim 3, characterized in that: The second chain body comprises a mounting plate and a connecting plate connected to each other, the mounting plate is used to be fixedly connected to the box cover, and the connecting plate is used to pass the hinge shaft; When the box cover is in a position to open the operating port, the connecting plate can move in the limiting groove until one side thereof abuts against the limiting plate, and the connecting plate is used to form the abutting portion with the side abutting against the limiting plate.

5. The valve protection box according to claim 3, characterized in that: An escape opening is formed between the limiting plate and the second lug for the second chain body to rotate around the hinge shaft, and the second chain body can rotate around the hinge shaft through the escape opening.

6. The valve protection box according to claim 3, characterized in that: The mounting seat is relatively fixedly mounted on the box body. When the box cover is at a position where the operation port is opened, the box cover is moved by external force so that the second chain body can move in the limiting groove.

7. The valve protection box according to claim 3, characterized in that: The mounting seat is movably mounted on the box body. When the box cover is in a position to open the operation port, the mounting seat is moved by external force so that the second chain body can move in the limiting groove.

8. The valve protection box according to claim 2, characterized in that: The first chain body includes a first sleeve, one end of the first sleeve partially protrudes to form a first convex block, and the limiting portion is a first step surface formed between the first convex block and the first sleeve; The second chain body includes a second sleeve, one end of the second sleeve partially protrudes to form a second convex block, and the abutment portion is a second step surface formed between the second convex block and the second sleeve; When the box cover is in a position where the operation opening is opened, the second step surface can move to a position where it is in contact with the first step surface.

9. The valve protection box according to claim 1, characterized in that: When the first chain body and the second chain body interfere with each other to keep the box cover at the position of opening the operation port, the opening angle of the box cover is 180°.

10. A tank container, characterized in that: It comprises a tank body and a frame supporting the tank body, and a valve protection box according to any one of claims 1 to 9, wherein the box body is fixedly connected to the frame.

Images