A tank truck manhole cover device that cannot be opened from the outside by bolts

Abstract

The utility model discloses a manhole cover device for a tank truck, which cannot be opened from the outside by bolts, comprising a circumferential tube, a circumferential tube flange and a manhole cover, wherein the circumferential tube flange is arranged at the top of the circumferential tube, and the manhole cover is arranged at the top of the circumferential tube flange, and further comprising a manhole cover bolt hole pressing ring, wherein the manhole cover bolt hole pressing ring is arranged on the upper surface of the manhole cover, and a plurality of bolt tapping holes are provided at the bottom of the manhole cover bolt hole pressing ring, and a plurality of bolt through holes are provided at the edges around the manhole cover, and the plurality of bolt through holes are connected to the plurality of bolt tapping holes in a one-to-one correspondence, and are fixed one by one by bolt connection. The utility model has the advantages that the bolts cannot be seen from the outside, the manhole cover cannot be opened by bolts, the safety is high, and the manhole cover can be effectively prevented from being opened by bolts, thereby preventing the problem of oil theft caused by human intervention.

Description

Technical Field

[0001] The utility model relates to the technical field of manhole covers for tank trucks, in particular to a manhole cover device for tank trucks which cannot be opened from the outside by bolts. Background Art

[0002] In the prior art, the bolts on the manhole cover of the tank truck are usually directly exposed to the outside. This manhole cover structure usually has the following defects: the manhole cover can be opened from the outside through the bolts, which is relatively unsafe and there is a risk of someone stealing oil by opening the manhole cover through the bolts. Utility Model Content

[0003] The utility model aims to provide a tank truck manhole cover device which cannot be opened from the outside by bolts, so as to solve the technical problems existing in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A manhole cover device for a tank truck which cannot be opened from the outside by bolts, comprises a circumferential cylinder, a circumferential cylinder flange and a manhole cover, wherein the circumferential cylinder flange is arranged at the top of the circumferential cylinder, the manhole cover is arranged at the top of the circumferential cylinder flange, and further comprises a manhole cover bolt hole pressing ring, the manhole cover bolt hole pressing ring is arranged on the upper surface of the manhole cover, and a plurality of bolt tapping holes are opened at the bottom of the manhole cover bolt hole pressing ring, a plurality of bolt through holes are opened at the edges around the manhole cover, and the plurality of bolt through holes are connected to the plurality of bolt tapping holes one by one, and are fixed one by one by bolt connection.

[0006] Furthermore, it also includes a first sealing gasket and a second sealing gasket, wherein the first sealing gasket is arranged between the surrounding tube flange and the manhole cover, and the second sealing gasket is arranged between the manhole cover and the manhole cover bolt hole pressure ring.

[0007] Furthermore, a plurality of bolt through holes are provided on the surrounding cylinder flange, the first sealing gasket and the second sealing gasket, and the plurality of bolt through holes provided on the surrounding cylinder flange are connected one-to-one with the plurality of bolt through holes provided on the first sealing gasket, the plurality of bolt through holes provided on the first sealing gasket are connected one-to-one with the plurality of bolt through holes provided on the manhole cover, the plurality of bolt through holes provided on the manhole cover are connected one-to-one with the plurality of bolt through holes provided on the second sealing gasket, and the plurality of bolt through holes provided on the second sealing gasket are connected one-to-one with the plurality of bolt tapping holes provided on the bolt hole pressure ring of the manhole cover.

[0008] Furthermore, the manhole cover is a European standard tank manhole cover for a tanker truck.

[0009] Compared with the prior art, the utility model has the following advantages: the bolts cannot be seen from the outside, the manhole cover cannot be opened by the bolts, the safety is high, and it can effectively prevent the manhole cover from being opened by humans through the bolts, resulting in the problem of human oil theft. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solution in this embodiment, the following is a brief introduction to the drawings required for use in the description of the embodiment. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a three-dimensional structural schematic diagram of a tank truck manhole cover device provided by the utility model, which cannot be opened from the outside by bolts;

[0012] Figure 2 It is a front schematic diagram of a tank truck manhole cover device provided by the utility model, which cannot be opened from the outside by bolts;

[0013] Figure 3 It is an exploded structural diagram of a tank truck manhole cover device provided by the utility model, which cannot be opened from the outside by bolts;

[0014] Figure 4 It is a structural schematic diagram of the bolt hole pressing ring of the manhole cover and the manhole cover in an assembled state;

[0015] Figure 5 It is a structural schematic diagram of one perspective when the bolt hole pressing ring of the manhole cover and the manhole cover are in a disassembled state;

[0016] Figure 6 It is a structural schematic diagram of another perspective when the bolt hole pressing ring of the manhole cover and the manhole cover are in a disassembled state;

[0017] Figure 7 is an embodiment of a manhole cover;

[0018] Explanation of the accompanying reference numerals: 1. surrounding cylinder; 2. surrounding cylinder flange; 3. manhole cover; 4. first sealing gasket; 5. second sealing gasket; 6. manhole cover bolt hole pressing ring; 7. bolt through hole; 8. bolt tapped hole. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following further describes how the present invention is implemented in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figures 1 to 6As shown, the utility model provides a tank truck manhole cover device that cannot be opened from the outside by bolts, comprising a surrounding cylinder 1, a surrounding cylinder flange 2, a manhole cover 3 and a manhole cover bolt hole pressing ring 6, wherein the surrounding cylinder flange 2 is arranged at the top of the surrounding cylinder 1, the manhole cover 3 is arranged at the top of the surrounding cylinder flange 2, the manhole cover bolt hole pressing ring 6 is arranged on the upper surface of the manhole cover 3, and a plurality of bolt tapping holes 8 are provided at the bottom of the manhole cover bolt hole pressing ring 6, a plurality of bolt through holes 7 are provided at the edges around the manhole cover 3, and the plurality of bolt through holes 7 are connected to the plurality of bolt tapping holes 8 in a one-to-one correspondence, and are fixed one by one by bolt connection. Among them, the bolt tapping holes 8 refer to blind holes that are only provided at the bottom of the manhole cover bolt hole pressing ring 6 and do not penetrate the top surface of the manhole cover bolt hole pressing ring 8; the purpose of such a design is to be able to hide the bolts on the manhole cover 3, that is, the bolts on the manhole cover 3 cannot be seen from the outside, so that people cannot open the manhole cover 3 from the outside by bolts.

[0021] Specifically, in the present utility model, the manhole cover 3 is a European standard manhole cover for a tanker truck, which is an existing product. Specifically, the one used is a manhole cover model C801A-560 of Zhejiang Jialong Machinery Equipment Co., Ltd. The manhole cover specifically includes a large manhole cover 301, a small manhole cover pressure block 302 and a small manhole cover 303. The large manhole cover 301 is provided with preparatory holes such as a breathing valve, oil and gas recovery and anti-overflow probe rod, and the small manhole cover 303 is provided with a keyhole 304. The small manhole cover pressure block 302 and the small manhole cover 303 can be flipped outward to open the oil delivery port provided on the large manhole cover 301.

[0022] Specifically, in some embodiments, in order to improve the sealing performance of the tank truck manhole cover device of the utility model, the tank truck manhole cover device provided by the utility model also includes a first sealing gasket 4 and a second sealing gasket 5, wherein the first sealing gasket 4 is arranged between the surrounding cylinder flange 2 and the manhole cover 3, and the second sealing gasket 5 is arranged between the manhole cover 3 and the manhole cover bolt hole pressure ring 6.

[0023] Specifically, in the above embodiment, the circumferential drum flange 2, the first gasket 4 and the second gasket 5 are all provided with a plurality of bolt through holes 7, and the plurality of bolt through holes 7 provided on the circumferential drum flange 2 are connected to the plurality of bolt through holes 7 provided on the first gasket 4 in a one-to-one correspondence, the plurality of bolt through holes 7 provided on the first gasket 4 are connected to the plurality of bolt through holes 7 provided on the manhole cover 3 in a one-to-one correspondence, the plurality of bolt through holes 7 provided on the manhole cover 3 are connected to the plurality of bolt through holes 7 provided on the second gasket 5 in a one-to-one correspondence, and the plurality of bolt through holes 7 provided on the second gasket 5 are connected to the plurality of bolt tapping holes 8 provided on the bolt hole pressing ring 6 of the manhole cover in a one-to-one correspondence. During assembly, the circumferential drum 1 is welded to the tank mouth of the tank truck, the circumferential drum flange 2 is welded to the circumferential drum 1, and the circumferential drum flange 2, the manhole cover 3, the first gasket 4, the second gasket 5 and the manhole cover bolt hole pressing ring 6 are combined together by bolts, thereby forming a device that cannot open the manhole cover from the outside by bolts.

[0024] When in use, if refueling is to be added to the oil tank of the tank truck from the tank port of the tank truck, the key needs to be inserted into the keyhole 304 provided on the small manhole cover 303, the cover lock of the small manhole cover 303 is opened, and then the small manhole cover pressing block 302 is opened, and then the small manhole cover 303 is opened, so that the oil delivery port provided on the large manhole cover 301 (the oil delivery port corresponds to the small manhole cover 303, when the small manhole cover 303 is opened, the oil delivery port is opened, and when the small manhole cover 303 is closed, the oil delivery port is closed) is opened, and then the oil delivery pipe is extended from the opened oil delivery port to the oil tank of the tank truck, and refueling can be done. If refueling is not needed, the small manhole cover 303 is locked with a key. If a person wants to go into the oil tank for maintenance, he must first insert the key into the keyhole 304 to unlock the cover lock of the small manhole cover 303, then turn up the small manhole cover pressure block 302 and the small manhole cover 303 in sequence, then reach into the oil delivery port, and use tools to remove the bolts on the large manhole cover 301, then take down the manhole cover bolt hole pressure ring 6, the second sealing gasket 5, and the manhole cover 3, so that the tank mouth is opened, and the person can enter the oil tank from the tank mouth for maintenance.

[0025] The utility model has the advantages that the bolts cannot be seen from the outside, and the manhole cover cannot be opened through the bolts, thereby preventing the manhole cover from being opened artificially through the bolts to steal oil.

[0026] Finally, it should be noted that the above description is only an embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made using the contents of the present utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present utility model.

Claims

1. A manhole cover device for a tank truck, which cannot be opened from the outside by bolts, comprises a shroud (1), a shroud flange (2) and a manhole cover (3), wherein the shroud flange (2) is arranged on the top of the shroud (1), and the manhole cover (3) is arranged on the top of the shroud flange (2), and is characterized in that: It also comprises a manhole cover bolt hole pressing ring (6), the manhole cover bolt hole pressing ring (6) is arranged on the upper surface of the manhole cover (3), and a plurality of bolt tapping holes (8) are opened at the bottom of the manhole cover bolt hole pressing ring (6), and a plurality of bolt through holes (7) are opened at the edges around the manhole cover (3), and the plurality of bolt through holes (7) are connected to the plurality of bolt tapping holes (8) in a one-to-one correspondence and are fixed one by one by bolt connection.

2. The tank truck manhole cover device according to claim 1, wherein the manhole cover cannot be opened from the outside by bolts, characterized in that: It also comprises a first sealing gasket (4) and a second sealing gasket (5), wherein the first sealing gasket (4) is arranged between the surrounding tube flange (2) and the manhole cover (3), and the second sealing gasket (5) is arranged between the manhole cover (3) and the manhole cover bolt hole pressing ring (6).

3. The tank truck manhole cover device according to claim 2, wherein the manhole cover cannot be opened from the outside by bolts, characterized in that: The circumferential flange (2), the first sealing gasket (4) and the second sealing gasket (5) are all provided with a plurality of bolt through holes (7), and the plurality of bolt through holes (7) provided on the circumferential flange (2) are connected in a one-to-one correspondence with the plurality of bolt through holes (7) provided on the first sealing gasket (4), the plurality of bolt through holes (7) provided on the first sealing gasket (4) are connected in a one-to-one correspondence with the plurality of bolt through holes (7) provided on the manhole cover (3), the plurality of bolt through holes (7) provided on the manhole cover (3) are connected in a one-to-one correspondence with the plurality of bolt through holes (7) provided on the second sealing gasket (5), and the plurality of bolt through holes (7) provided on the second sealing gasket (5) are connected in a one-to-one correspondence with the plurality of bolt tapping holes (8) provided on the bolt hole pressure ring (6) of the manhole cover.

4. The tank truck manhole cover device according to claim 3, wherein the manhole cover cannot be opened from the outside by bolts, characterized in that: The manhole cover (3) is a European standard manhole cover for oil tank trucks.

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