CN211282269U - One-key manhole cover with double safety devices for road transportation tank type vehicle - Google Patents

One-key manhole cover with double safety devices for road transportation tank type vehicle Download PDF

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Publication number
CN211282269U
CN211282269U CN201922236487.4U CN201922236487U CN211282269U CN 211282269 U CN211282269 U CN 211282269U CN 201922236487 U CN201922236487 U CN 201922236487U CN 211282269 U CN211282269 U CN 211282269U
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cover
upper cover
pressing
arm shaft
ring
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CN201922236487.4U
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Chinese (zh)
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谢元春
罗飞
周代权
王伦科
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Hubei Huate Special Equipment Co ltd
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Hubei Huate Special Equipment Co ltd
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Abstract

The utility model discloses a one-key manhole cover for a double-safety device of a road transportation tank vehicle, which comprises a lower seat ring, a method, a Y-shaped sealing ring, an upper cover arc reinforcing plate, an upper cover, a hinge, a pressing mechanism and a cover opening handle, wherein the lower part of the lower seat ring is welded and fixed with a tank body of the transportation tank vehicle, the upper part of the lower seat ring is welded and fixed with the lower part of the flange, the upper part of the flange is in sealing contact with the Y-shaped sealing ring embedded at the lower part of the upper cover, the upper cover arc reinforcing plate is welded and fixed at the bottom of the upper cover and is positioned at the inner side of the Y-shaped sealing ring, one side of the upper cover is hinged with the other side of the lower seat ring through the hinge, the other; a spring retainer ring for preventing the Y-shaped sealing ring from falling off from the upper cover is also clamped in the Y-shaped groove of the Y-shaped sealing ring. The utility model has the advantages that: convenient operation, safety and reliability, light weight, environmental protection and low leakage accident rate.

Description

One-key manhole cover with double safety devices for road transportation tank type vehicle
Technical Field
The utility model relates to a manhole cover, specific saying so relates to and is used for two safety device one-key manhole cover of road transport tank vehicle.
Background
The traditional manhole cover mainly comprises an inner buckle type manhole cover and an outer buckle type manhole cover, sealing strips of the manhole cover are made of common solid rubber, the sealing strips are poor in elasticity, if flanges are slightly deformed in the welding process, the phenomenon of air leakage can occur, unloading is further influenced, and normal unloading can not be achieved in severe situations; in addition, the switch is complex, the bearing pressure is not guaranteed, the product design is heavy, the overall weight of the vehicle is increased, and national policies such as light weight, energy conservation, emission reduction and the like cannot be well responded.
SUMMERY OF THE UTILITY MODEL
To the problem in the background art, the utility model aims to provide a one-key manhole cover is used for two safety device one-key of road transport tank vehicle.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a one-key manhole cover for a double-safety device of a road transportation tank vehicle comprises a lower seat ring, a flange, a Y-shaped sealing ring, an upper cover circular arc reinforcing plate, an upper cover, a hinge, a pressing mechanism and a cover opening handle, wherein the lower part of the lower seat ring is welded and fixed with a tank body of the transportation tank vehicle, the upper part of the lower seat ring is welded and fixed with the lower part of the flange, the upper part of the flange is in sealing contact with the Y-shaped sealing ring embedded at the lower part of the upper cover, the upper cover circular arc reinforcing plate is welded and fixed at the bottom of the upper cover and is positioned at the inner side of the Y-shaped sealing ring, one side of the upper cover is hinged with one side of the lower seat ring through the hinge, the other side of the upper cover is buckled with the other side of the lower seat ring through the pressing mechanism; and a spring retainer ring for preventing the Y-shaped sealing ring from falling off from the upper cover is clamped in the Y-shaped groove of the Y-shaped sealing ring.
And the safety pin chain is used for being inserted in the pressing mechanism to further lock the pressing mechanism.
Furthermore, the Y-shaped sealing ring is embedded in an annular anti-falling groove formed in the lower portion of the upper cover.
Furthermore, the pressing mechanism comprises a pressing arm shaft, a pressing handle, two upper pressing plates and two lower pressing plates, the pressing handle is fixed in the middle of the pressing arm shaft, the two lower pressing plates are respectively arranged at two ends of the pressing arm shaft and respectively fixed on the lower seat rings, the two upper pressing plates are respectively arranged at two ends of the pressing arm shaft and respectively fixed on the upper covers, each upper pressing plate is correspondingly positioned on the inner side of one lower pressing plate, one end of each upper pressing plate is fixedly connected with the upper cover, and the other end of each upper pressing plate is correspondingly clamped with one end of the pressing arm shaft; one end of each lower buckle plate is fixedly connected with the lower seat ring, and the other end of each lower buckle plate is correspondingly clamped with one end of the compression arm shaft; the safety pin is correspondingly inserted into one of the upper buckling plates, one end of the safety pin chain is connected with the safety pin, and the other end of the safety pin chain is connected with one lower buckling plate corresponding to the upper buckling plate into which the safety pin is inserted.
Furthermore, one end of each upper pinch plate, which is far away from the upper cover, is provided with an arc opening clamping groove for clamping the compression arm shaft;
one end of each lower buckle plate, which is far away from the lower seat ring, is provided with a cam hole for clamping the compression arm shaft;
two ends of the pressing arm shaft are provided with arc bosses;
during assembly, the compression arm shaft respectively and correspondingly penetrates through the cam holes in the two lower pinch plates through the arc bosses arranged at the two ends and is respectively and correspondingly connected with one compression end cover, each compression end cover is correspondingly connected and fixed with the arc boss arranged at one end of the compression arm shaft through one screw, and a spring washer is further arranged between each compression end cover and the screw.
Further, the cam hole comprises a straight hole section and an arc hole section, the straight hole section is used for being matched with an arc boss of the pressing arm shaft in a sliding mode, and the arc hole section is used for being matched with the arc boss of the pressing arm shaft in a rotating mode.
Further, hinge quantity is two, and every hinge all contains one and goes up hinge seat, a lower hinge seat, a T type round pin axle, a gasket and a split pin, it fixes to go up the hinge seat the upper cover, lower hinge seat is fixed down the seat circles, go up and pass through between hinge seat and the lower hinge seat T type round pin axle articulates together, just the head of T type round pin axle with go up the hinge seat and laminate mutually, the afterbody passes hinge seat, lower hinge seat and gasket in proper order and stretches to establish in the outside T type round pin axle is exposed and is established and insert and establish one on the tail end of outside split pin.
Further, the Y-shaped sealing ring is an ethylene propylene diene monomer sealing ring.
Further, when the upper cover is in a compressed state, the maximum pressure borne by the upper cover is 0.4 MPa.
Furthermore, the lower seat ring, the flange, the spring retainer ring, the upper cover arc reinforcing plate, the upper cover, the hinge, the pressing mechanism and the cover opening handle are all made of light-weight high-strength metal materials.
The utility model provides a be used for two safety device one-key manhole cover theory of operation of road transport tank vehicle as follows:
before use, firstly welding a one-key manhole cover of the double safety insurance of the road transport tank vehicle to the top of a tank body of the road transport tank vehicle, closing an upper cover, pressing a pressing mechanism and inserting a safety pin; when the pressure in the tank slowly rises, the Y-shaped sealing ring expands towards two sides under the influence of air pressure to fill up a connecting sealing gap between the upper cover and the flange in the manhole cover to form a fully-closed type seal, so that the problem of air leakage caused by the fact that the traditional solid rubber sealing strip is removed and the flange cannot be effectively sealed due to poor elasticity when the flange deforms is solved;
during the transportation and unloading processes, the Y-shaped sealing ring is pressed by the pressing action force of the pressing mechanism, so that the manhole cover is always in a sealing state;
during the loading process, the safety pin is firstly pulled out and the pressing mechanism is opened, the upper cover is opened by the cover opening handle, then the material is loaded into the tank body of the road transportation tank vehicle from the manhole cover, and when the upper cover is opened, the Y-shaped sealing ring is pressed in the upper cover through the spring retainer ring and cannot fall off or be damaged.
Compared with the prior art, the utility model has the advantages that: the sealing structure combining the Y-shaped sealing strip and the spring retainer ring is adopted, so that the strength of two sides of the Y-shaped sealing ring is enhanced, the deformed position of the flange can be automatically filled, the air leakage problem caused by the fact that the flange is deformed and sealed not tightly can be effectively solved, the phenomenon that a manhole cover cannot normally unload due to air leakage is reduced, the phenomenon that the manhole cover falls off due to the fact that the sealing strip is uncovered is also overcome, and the sealing structure has the advantages of convenience in operation, safety, reliability, environmental friendliness, low leakage accident rate and the like.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is an enlarged view of FIG. 3 at M;
fig. 5 is a perspective exploded view of the present invention;
FIG. 6 is a specific embodiment of the present invention;
description of reference numerals: 1. a lower seat ring; 2. a flange; 3. a Y-shaped seal ring; 4. a spring collar; 5. an upper cover circular arc reinforcing plate; 6. an upper cover; 7. a hinge; 7a, an upper hinge seat; 7b, a lower hinge base; 7c, a T-shaped pin shaft; 7d, a gasket; 7e, a cotter pin; 8. a hold-down mechanism; 8a, a pressing arm shaft; 8a-1, a circular arc boss; 8b, a pressing handle; 8c, an upper buckle plate; 8d, a lower buckle plate; 8e, an arc opening clamping groove; 8f, cam holes; 8f-1, straight hole section; 8f-2, a circular arc hole section; 8g, pressing the end cover; 8h, screwing; 8i, a spring washer; 9. a shear pin; 10. a shear pin chain; 11. a cover opening handle; 12. and (5) a tank body.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, how to implement the present invention is further explained below with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 6, the one-key manhole cover for a double safety device of a road transportation tank vehicle provided by the present invention comprises a lower seat ring 1, a flange 2, a Y-shaped sealing ring 3, a spring collar 4, an upper cover circular arc reinforcing plate 5, an upper cover 6, a hinge 7, a hold-down mechanism 8 and a cover opening handle 11, wherein the lower part of the lower seat ring 1 is welded and fixed with a tank body 12 of the transportation tank vehicle, the upper part of the lower seat ring 1 is welded and fixed with the lower part of the flange 2, the upper part of the flange 2 is in sealing contact with the Y-shaped sealing ring 3 embedded in the lower part of the upper cover 6, the upper cover circular arc reinforcing plate 5 is welded and fixed at the bottom of the upper, the Y-shaped sealing ring is positioned on the inner side of the Y-shaped sealing ring 3, one side of an upper cover 6 is hinged with one side of the lower seat ring 1 through a hinge 7, the other side of the upper cover 6 is buckled with the other side of the lower seat ring 1 through a pressing mechanism 8, and a cover opening handle 11 is arranged on one side of the upper cover 6; the spring retainer ring 4 is clamped in a Y-shaped groove of the Y-shaped sealing ring 3, and the spring retainer ring 4 is used for preventing the Y-shaped sealing ring 3 from falling off from the upper cover 6 when the cover is opened.
In order to avoid the maloperation and open the manhole cover, lead to the potential safety hazard, the utility model discloses the manhole cover still includes a safety pin 9 and a safety pin chain 10, and this safety pin chain 10 one end is connected with hold-down mechanism 8, and the other end is connected with safety pin 9, and safety pin 9 is arranged in inserting and establishes in hold-down mechanism 8, plays further locking hold-down mechanism 8's effect, avoids opening the manhole cover because of the maloperation, has improved the factor of safety of manhole cover greatly, and safety pin chain 10 is used for tying safety pin 9, prevents that it from droing.
Specifically, referring to fig. 4, the Y-shaped seal ring 3 is preferably an epdm seal ring, and is embedded in an annular anti-drop groove 6a formed in the lower portion of the upper cover 6; when the pressure in the tank body 12 of the road transportation tank vehicle slowly rises, the Y-shaped sealing ring 3 expands towards two sides under the influence of the air pressure, and then the connecting sealing gap between the upper cover 6 and the flange 2 in the manhole cover is filled to form full-closed sealing, so that the problem of air leakage caused by the fact that the traditional solid rubber sealing strip cannot effectively seal due to poor elasticity when the flange deforms is effectively solved; in addition, the spring retainer ring 4 embedded in the Y-shaped sealing ring 3 can not only strengthen the two sides of the Y-shaped groove of the Y-shaped sealing ring 3, so that the Y-shaped sealing ring 3 can automatically compensate the deformation position through the self pressure when the upper cover 6 and the flange 2 are slightly deformed, thereby playing a good sealing role and reducing the leakage problem of a manhole cover; the connection firmness of the Y-shaped sealing ring 3 and the upper cover 6 can be enhanced, and the Y-shaped sealing ring 3 is prevented from falling off from the upper cover 6 when the cover is opened.
Specifically, referring to fig. 3 and 5, the pressing mechanism 8 includes a pressing arm shaft 8a, a pressing handle 8b, two upper pinch plates 8c and two lower pinch plates 8d, the pressing handle 8b is fixed in the middle of the pressing arm shaft 8a, the two lower pinch plates 8d are respectively arranged at two ends of the pressing arm shaft 8a and are respectively fixed on the lower seat ring 1, the two upper pinch plates 8c are respectively arranged at two ends of the pressing arm shaft 8a and are respectively fixed on the upper cover 6, each upper pinch plate 8c is correspondingly positioned at the inner side of one lower pinch plate 8d, one end of each upper pinch plate 8c is fixedly connected with the upper cover 6, and the other end is correspondingly clamped with one end of the pressing arm shaft 8 a; one end of each lower buckle plate 8d is fixedly connected with the lower seat ring 1, and the other end of each lower buckle plate is correspondingly clamped with one end of the pressing arm shaft 8 a; the safety pin 9 is correspondingly inserted on one of the upper pinch plates 8c, one end of the safety pin chain 10 is connected with the safety pin 9, and the other end of the safety pin chain is connected with one lower pinch plate 8d corresponding to the upper pinch plate 8c into which the safety pin 9 is inserted.
More specifically, referring to fig. 5, an arc-opening clamping groove 8e for clamping the pressing arm shaft 8a is formed at one end of each upper buckle plate 8c away from the upper cover 6; one end of each lower buckle plate 8d, which is far away from the lower seat ring 1, is provided with a cam hole 8f for clamping and connecting the pressing arm shaft 8 a; two ends of the pressing arm shaft 8a are provided with an arc boss 8 a-1; during assembly, the pressing arm shaft 8a correspondingly penetrates through the cam holes 8f on the two lower pinch plates 8d through the arc bosses 8a-1 arranged at the two ends respectively and is correspondingly connected with a pressing end cover 8g respectively, each pressing end cover 8g is correspondingly connected and fixed with the arc boss 8a-1 arranged at one end of the pressing arm shaft 8a through a screw 8h, and a spring washer 8i is arranged between each pressing end cover 8g and the screw 8 h.
More specifically, referring to fig. 5, the cam hole 8f includes a straight hole section 8f-1 and an arc hole section 8f-2, the straight hole section 8f-1 is configured to slidably engage with the arc boss 8a-1 of the pressing arm shaft 8a, and the arc hole section 8f-2 is configured to rotatably engage with the arc boss 8a-1 of the pressing arm shaft 8 a.
Specifically, referring to fig. 2, the number of the hinges 7 is two, each hinge 7 includes an upper hinge base 7a, a lower hinge base 7b, a T-shaped pin 7c, a gasket 7d, and a cotter 7e, the upper hinge base 7a is fixed to the upper cover 6, the lower hinge base 7b is fixed to the lower seat ring 1, the upper hinge base 7a and the lower hinge base 7b are hinged together through the T-shaped pin 7c, the head of the T-shaped pin 7c is attached to the upper hinge base 7a, the tail sequentially passes through the upper hinge base 7a, the lower hinge base 7b, and the gasket 7d and extends to the outside, and the cotter 7e is inserted into the tail end of the T-shaped pin 7c exposed to the outside.
In the utility model, when the upper cover 6 is in a compression state, the maximum pressure born by the upper cover 6 is 0.4 MPa; when the pressure exceeds 0.4MPa, the upper cover 6 deforms and exhausts air.
In the utility model, the lower seat ring 1, the flange 2, the spring retainer ring 4, the upper cover arc reinforcing plate 5, the upper cover 6, the hinge 7, the pressing mechanism 8 and the cover opening handle 11 are all made of light high-strength metal materials; preferably a light weight, high strength carbon steel material.
The utility model provides a working process that is used for two safety device one-key manhole covers of road transport tank vehicle as follows:
before use, firstly, a one-key manhole cover of the double-safety device for the road transport tank vehicle is welded to the top of a tank body 12 of the road transport tank vehicle, then an upper cover 6 is closed, a pressing mechanism 8 is pressed, a safety pin 9 is inserted, and at the moment, a Y-shaped sealing ring 3 can enable a connecting gap between a flange 2 and the upper cover 6 to be filled up through the pressure of the pressing mechanism 8 to form full-closed sealing, so that the problem of air leakage caused by the fact that the traditional solid rubber sealing strip cannot be effectively sealed due to poor elasticity when the flange deforms is effectively solved;
when the cover is required to be opened for loading operation, the pressing handle 8b of the pressing mechanism 8 is moved upwards to drive the pressing arm shaft 8a to rotate upwards by 90 degrees, the circular arc bosses 8a-1 at the two ends of the pressing arm shaft 8a are turned downwards by 90 degrees in the circular arc hole sections 8f-2 of the cam holes 8f in the two lower buckle plates 8d to be parallel to the straight strip hole sections 8f-1 of the cam holes 8f, then the safety pin 9 inserted on one upper buckle plate 8c is pulled out, then the pressing handle 8b of the pressing mechanism 8 is pulled outwards (i.e. in the direction far away from the upper cover), the circular arc bosses 8a-1 at the two ends of the pressing arm shaft 8a are pulled by the pressing handle 8b to slide into the straight strip hole sections 8f-1 from the circular arc hole sections 8f-2 of the cam holes 8f and outwards along the straight strip hole sections 8f-1, until the end of the straight hole section 8f-1 is reached, the pressing arm shaft 8a is separated from the arc opening clamping groove 8e of the upper buckle plate 8c and slides into the straight hole section 8f-1 of the lower buckle plate 8d, the pressing mechanism 8 loses the pressing effect on the upper cover 6, and finally the upper cover 6 is opened by moving the cover opening handle 11 upwards, and materials are loaded into the road transportation tank vehicle tank body 12 from the manhole cover;
after the charging is finished, the upper cover 6 is closed again, the pressing mechanism 8 is pressed, and the operation process of closing the cover is opposite to that of opening the cover, and the method specifically comprises the following steps: the cover opening handle 11 is moved downwards to close the upper cover 6, then the pressing handle 8b of the pressing mechanism 8 is pushed backwards (namely towards the direction close to the upper cover), the circular arc bosses 8a-1 at the two ends of the pressing arm shaft 8a slide into the circular arc hole sections 8f-2 of the two straight hole sections 8f of the cam holes 8f in the two lower buckle plates 8d, then the pressing handle 8b of the pressing mechanism 8 is moved downwards to drive the pressing arm shaft 8a to rotate 90 degrees downwards, the circular arc bosses 8a-1 at the two ends of the pressing arm shaft 8a turn upwards by 90 degrees in the circular arc hole sections 8f-2 of the cam holes 8f in the two lower buckle plates 8d, so that the circular arc bosses 8a-1 at the two ends of the pressing arm shaft 8a are vertical to the straight hole sections 8f-1 of the two cam holes 8f, and the pressing handle 8b of the pressing mechanism 8 is just pressed on the upper cover 6, the arc bosses 8a-1 at the two ends of the pressing arm shaft 8a also just slide into the arc opening clamping grooves 8e of the two upper buckling plates 8c, and finally the safety pin 9 is inserted into one of the upper buckling plates 8c, so that the cover closing operation is completed.
Finally, the above description is only the embodiments of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A one-key manhole cover for a double-safety device of a road transportation tank vehicle comprises a lower seat ring (1), a flange (2), a Y-shaped sealing ring (3), an upper cover arc reinforcing plate (5), an upper cover (6), a hinge (7), a pressing mechanism (8) and a cover opening handle (11), wherein the lower part of the lower seat ring (1) is welded and fixed with a tank body (12) of the transportation tank vehicle, the upper part of the lower seat ring (1) is welded and fixed with the lower part of the flange (2), the upper part of the flange (2) is in sealing contact with the Y-shaped sealing ring (3) embedded at the lower part of the upper cover (6), the upper cover arc reinforcing plate (5) is welded and fixed at the bottom of the upper cover (6) and is positioned at the inner side of the Y-shaped sealing ring (3), one side of the upper cover (6) is hinged with one side of the lower seat ring (1) through the hinge (7), and the other side of the upper cover (6) is fastened with the other side of the lower seat ring (1, the cover opening handle (11) is arranged on one side of the upper cover (6); the method is characterized in that: and a spring retainer ring (4) for preventing the Y-shaped sealing ring (3) from falling off from the upper cover (6) is also clamped in the Y-shaped groove of the Y-shaped sealing ring (3).
2. The dual safety guard one-click manhole cover for road transport tank vehicles according to claim 1, wherein: still include a safety pin (9) and a safety pin chain (10), safety pin chain (10) one end is connected with hold-down mechanism (8), the other end with safety pin (9) are connected, safety pin (9) are used for inserting and establish in hold-down mechanism (8), play further locking hold-down mechanism (8)'s effect.
3. The dual safety guard one-click manhole cover for road transport tank vehicles according to claim 1, wherein: the Y-shaped sealing ring (3) is embedded in an annular anti-falling groove (6a) formed in the lower portion of the upper cover (6).
4. The dual safety guard one-click manhole cover for road transport tank vehicles according to claim 2, wherein: the pressing mechanism (8) comprises a pressing arm shaft (8a), a pressing handle (8b), two upper buckling plates (8c) and two lower buckling plates (8d), the pressing handle (8b) is fixed in the middle of the pressing arm shaft (8a), the two lower buckling plates (8d) are respectively arranged at two ends of the pressing arm shaft (8a) and are respectively fixed on the lower seat ring (1), the two upper buckling plates (8c) are respectively arranged at two ends of the pressing arm shaft (8a) and are respectively fixed on the upper cover (6), each upper buckling plate (8c) is correspondingly positioned on the inner side of one lower buckling plate (8d), one end of each upper buckling plate (8c) is fixedly connected with the upper cover (6), and the other end of each upper buckling plate is correspondingly clamped with one end of the pressing arm shaft (8 a); one end of each lower buckle plate (8d) is fixedly connected with the lower seat ring (1), and the other end of each lower buckle plate is correspondingly clamped with one end of the compression arm shaft (8 a); the safety pin (9) is correspondingly inserted into one of the upper buckle plates (8c), one end of the safety pin chain (10) is connected with the safety pin (9), and the other end of the safety pin chain is connected with one lower buckle plate (8d) corresponding to the upper buckle plate (8c) into which the safety pin (9) is inserted.
5. The dual safety guard one-click manhole cover for road transport tank vehicles according to claim 4, wherein:
one end of each upper buckle plate (8c) far away from the upper cover (6) is provided with an arc opening clamping groove (8e) for clamping the compression arm shaft (8 a);
one end of each lower buckle plate (8d) far away from the lower seat ring (1) is provided with a cam hole (8f) for clamping the compression arm shaft (8 a);
both ends of the pressing arm shaft (8a) are provided with arc bosses (8 a-1);
during assembly, the pressing arm shaft (8a) correspondingly penetrates through cam holes (8f) in two lower pinch plates (8d) through arc bosses (8a-1) arranged at two ends respectively and is correspondingly connected with a pressing end cover (8g), each pressing end cover (8g) is correspondingly connected and fixed with the arc boss (8a-1) arranged at one end of the pressing arm shaft (8a) through a screw (8h), and a spring washer (8i) is arranged between each pressing end cover (8g) and the screw (8 h).
6. The dual safety guard one-click manhole cover for road transport tank vehicles according to claim 5, wherein: the cam hole (8f) comprises a straight hole section (8f-1) and an arc hole section (8f-2), the straight hole section (8f-1) is used for being matched with an arc boss (8a-1) of the pressing arm shaft (8a) in a sliding mode, and the arc hole section (8f-2) is used for being matched with the arc boss (8a-1) of the pressing arm shaft (8a) in a rotating mode.
7. The dual safety guard one-button manhole cover for road transport tank vehicles according to any one of claims 1 to 6, wherein: the number of the hinges (7) is two, each hinge (7) comprises an upper hinge seat (7a), a lower hinge seat (7b), a T-shaped pin shaft (7c), a gasket (7d) and a cotter pin (7e), the upper hinge seat (7a) is fixed on the upper cover (6), the lower hinge seat (7b) is fixed on the lower seat ring (1), the upper hinge seat (7a) and the lower hinge seat (7b) are hinged together through the T-shaped pin shaft (7c), the head part of the T-shaped pin shaft (7c) is attached to the upper hinge seat (7a), the tail part of the T-shaped pin shaft sequentially passes through the upper hinge seat (7a), the lower hinge seat (7b) and the gasket (7d) and extends to the outside, the tail end of the T-shaped pin shaft (7c) exposed outside is inserted with the cotter pin (7 e).
8. The dual safety guard one-button manhole cover for road transport tank vehicles according to any one of claims 1 to 6, wherein: the Y-shaped sealing ring (3) is an ethylene propylene diene monomer sealing ring.
9. The dual safety guard one-button manhole cover for road transport tank vehicles according to any one of claims 1 to 6, wherein: when the upper cover (6) is in a compression state, the maximum pressure borne by the upper cover (6) is 0.4 MPa.
10. The dual safety guard one-button manhole cover for road transport tank vehicles according to any one of claims 1 to 6, wherein: the lower seat ring (1), the flange (2), the spring retainer ring (4), the upper cover arc reinforcing plate (5), the upper cover (6), the hinge (7), the pressing mechanism (8) and the cover opening handle (11) are all made of light high-strength metal materials.
CN201922236487.4U 2019-12-13 2019-12-13 One-key manhole cover with double safety devices for road transportation tank type vehicle Active CN211282269U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922236487.4U CN211282269U (en) 2019-12-13 2019-12-13 One-key manhole cover with double safety devices for road transportation tank type vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922236487.4U CN211282269U (en) 2019-12-13 2019-12-13 One-key manhole cover with double safety devices for road transportation tank type vehicle

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CN211282269U true CN211282269U (en) 2020-08-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112707053A (en) * 2020-12-18 2021-04-27 安徽工程大学 Manhole cover locking device for road transportation liquid dangerous cargo tank vehicle
CN115289386A (en) * 2022-08-10 2022-11-04 安徽扬天金塑新能源装备有限公司 Temperature deformation compensation device for low-temperature liquid oxygen manhole

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112707053A (en) * 2020-12-18 2021-04-27 安徽工程大学 Manhole cover locking device for road transportation liquid dangerous cargo tank vehicle
CN112707053B (en) * 2020-12-18 2023-03-14 安徽工程大学 Manhole cover locking device for road transportation liquid dangerous cargo tank vehicle
CN115289386A (en) * 2022-08-10 2022-11-04 安徽扬天金塑新能源装备有限公司 Temperature deformation compensation device for low-temperature liquid oxygen manhole

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