Pneumatic train sealing cap spiral sliding groove type locking device

Abstract

The utility model discloses a spiral chute type locking device for a pneumatic train sealing cap. The spiral chute type locking device comprises a sealing cap, a locking mechanism, a driving mechanism, a loading arm and a rotating mechanism, a first mounting hole is formed in the middle of the sealing cap, and second mounting holes are symmetrically formed in the two sides of the first mounting hole; locking mechanisms are symmetrically mounted in the second mounting holes in the two sides of the sealing cap; the top ends of the locking mechanisms are in transmission connection with driving mechanisms for driving the pull rods to move up and down along the guide grooves; and the loading arm is mounted on the first mounting hole through a rotating mechanism. The sealing cap is locked at the position of a train tank car opening in a spiral sliding groove mode, when an overhauling escalator or other additional structures stretching into the tank car opening are additionally arranged in the tank car opening, the device can still achieve complete sealing, the sealing performance is high, and leakage can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of storage, transportation and loading and unloading of petrochemical products, in particular to a spiral slide groove type locking device for a pneumatic train sealing cap. Background Art

[0002] In order to control the emission of air pollutants and improve the atmospheric environment, most oil storage and transportation depots will inevitably adopt closed loading cranes for train loading. Among them, the airtight locking between the sealing cap and the train tank mouth is one of the key technologies.

[0003] At present, the closed loading crane pipes of trains on the market often use an internal clamping device for the sealing cap. This device is only suitable for general tank car openings, has a large action stroke and a small locking torque. When the tank car opening is equipped with an escalator for inspection or other additional structures for probing into the tank car opening, this device cannot achieve the locking effect of the sealing cap, which can easily lead to leakage of harmful chemicals and cause pollution to the atmosphere and environment. Therefore, the expected effect cannot be achieved and leakage is likely to occur. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a pneumatic train sealing cap spiral slide groove locking device which has a simple locking structure, good locking torque effect, and can effectively lock the sealing cap in various situations.

[0005] The utility model provides a spiral slide-type locking device for a pneumatic train sealing cap, comprising a sealing cap, a locking mechanism, a driving mechanism, a lifting pipe and a rotating mechanism;

[0006] A first mounting hole is formed in the middle of the sealing cap, and second mounting holes are formed symmetrically on both sides of the first mounting hole.

[0007] The second mounting holes on both sides of the sealing cap are symmetrically installed with locking mechanisms; the locking mechanism includes a guide sleeve, a pull rod and a claw, the top of the guide sleeve is fixedly connected to the second mounting hole, and guide grooves are centrally symmetrically arranged on both sides of the guide sleeve, the guide grooves include a vertical slide groove and a spiral slide groove connected to the bottom end of the vertical slide groove, the pull rod passes through the guide sleeve, and guide rods are symmetrically connected on both sides of the pull rod, and the guide rods pass through the guide grooves one by one, and the claws are horizontally arranged, and one end of the claws is fixedly connected to the bottom end of the pull rod; when the guide rod is located at the bottom end of the spiral slide groove, the claws face inward; when the guide rod is located in the vertical slide groove, the claws face outward;

[0008] The top end of the locking mechanism is connected to a driving mechanism for driving the pull rod to move up and down along the guide groove;

[0009] The crane pipe is installed on the first installation hole through a rotating mechanism.

[0010] Furthermore, a first sealing step is provided around the outer periphery of the top of the sealing cap. A second sealing step is provided on the outer periphery of the sealing cap below the first sealing step. A first sealing ring is fixedly provided on the bottom surface of the first sealing step, and a second sealing ring is fixedly provided on the bottom surface of the second sealing step.

[0011] Furthermore, the driving mechanism includes a driving cylinder and a rotating connecting member. The top end of the guiding sleeve is fixedly connected with a supporting sleeve. The driving cylinder is fixedly provided at the top end of the supporting sleeve. The piston rod of the driving cylinder extends into the supporting sleeve and is rotatably connected with the top end of the rotating connecting member. The bottom end of the rotating connecting member is fixedly connected with the pull rod.

[0012] Furthermore, a third sealing ring is provided between the top end of the guiding sleeve and the pull rod.

[0013] Furthermore, the rotating mechanism includes an inner spherical surface pressing ring, an inner spherical surface upper pressing ring and an outer spherical surface fixing ring. The inner spherical surface pressing ring is fixedly provided on the top surface of the sealing cap around the outer periphery of the first mounting hole. The inner spherical surface upper pressing ring is fixedly installed on the top surface of the inner spherical surface pressing ring by a first screw. The outer spherical surface fixing ring is sleeved on the loading arm and fixedly connected with the fixing flange on the loading arm by a second screw. The outer spherical surface fixing ring is embedded between the inner spherical surface pressing ring and the inner spherical surface upper pressing ring. The inner spherical surface of the inner spherical surface pressing ring is adapted to the outer spherical surface of the lower half of the outer spherical surface fixing ring, and the inner spherical surface of the inner spherical surface upper pressing ring is adapted to the outer spherical surface of the upper half of the outer spherical surface fixing ring.

[0014] Furthermore, a positioning ring groove is provided around the top of the inner periphery of the inner spherical surface pressing ring, and a positioning convex ring is provided at the bottom of the inner spherical surface upper pressing ring corresponding to the positioning ring groove.

[0015] Furthermore, a fourth sealing ring is provided between the inner spherical surface pressing ring and the sealing cap; a fifth sealing ring is provided between the inner spherical surface pressing ring and the outer spherical surface fixing ring; a sixth sealing ring is provided between the outer spherical surface fixing ring and the loading arm.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) The pneumatic train sealing cap spiral chute type locking device provided by the present utility model is provided with locking mechanisms on both sides of the loading arm. The sealing cap is locked at the train tank car opening in a spiral chute manner. When there is a maintenance ladder or other additional structures extending into the tank car opening inside the tank car opening, this device can still achieve complete sealing, with strong sealing performance and can effectively avoid leakage.

[0018] (2) The pneumatic train sealing cap spiral chute type locking device provided by the present utility model is provided with a rotating mechanism, which is fixedly installed on the fixed flange of the train loading arm. When the train tank car opening cannot be aligned with the loading arm due to dimensional errors, the rotating mechanism can be adjusted so that the train tank car opening is completely aligned with the loading arm. This structure can effectively and flexibly adjust the docking angle between the loading arm and the tank car opening, so that the loading arm and the tank car opening can be completely aligned, avoiding affecting the sealing performance of the device.

[0019] It should be understood that the content described in the utility model content part is not intended to limit the key or important features of the embodiments of the present utility model, nor to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. Brief Description of the Drawings

[0020] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objectives and advantages of the present utility model will become more obvious:

[0021] Figure 1 It is a structural schematic diagram of the spiral chute type locking device for the train sealing cap;

[0022] Figure 2 It is a structural schematic diagram of the locking mechanism of the spiral chute type locking device for the train sealing cap;

[0023] Figure 3 It is an enlarged schematic diagram of the rotating mechanism of the spiral chute type locking device for the train sealing cap;

[0024] Reference numerals in the figures: 1, sealing cap; 2, locking mechanism; 3, driving mechanism; 4, loading arm; 5, rotating mechanism; 6, fixed flange;

[0025] 11, first stepped sealing cap; 12, second stepped sealing cap; 13, first sealing ring; 14, second sealing ring;

[0026] 21, guiding sleeve; 22, pull rod; 23, claw; 24, guiding groove; 25, guiding rod;

[0027] 241, vertical chute; 242, spiral chute;

[0028] 31, driving cylinder; 32, rotating connecting piece; 33, supporting sleeve;

[0029] 51, inner spherical surface pressing ring; 52, inner spherical surface upper pressing ring; 53, outer spherical surface fixing ring. Detailed Description of the Embodiments

[0030] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the utility model are shown in the drawings.

[0031] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0032] Please refer to Figures 1 to 3 , an embodiment of the present utility model provides a pneumatic train sealing cap spiral chute type locking device, which includes a sealing cap 1, a locking mechanism 2, a driving mechanism 3, a loading arm 4, and a rotating mechanism 5;

[0033] A first mounting hole is opened in the middle of the sealing cap 1, and second mounting holes are symmetrically opened on both sides of the first mounting hole;

[0034] Locking mechanisms 2 are symmetrically installed in the second mounting holes on both sides of the sealing cap 1; the locking mechanism 2 includes a guiding sleeve 21, a pull rod 22, and a claw 23. The top end of the guiding sleeve 21 is fixedly connected to the second mounting hole. Guiding grooves 24 are symmetrically arranged on both sides of the guiding sleeve 21 in a central symmetry manner. The guiding groove 24 includes a vertical chute 241 and a spiral chute 242 connected to the bottom end of the vertical chute 241. The pull rod 22 passes through the guiding sleeve 21, and guiding rods 25 are symmetrically connected to both sides of the pull rod 22. The guiding rods 25 pass through the guiding grooves 24 one by one. The claw 23 is horizontally arranged, and one end of it is fixedly connected to the bottom end of the pull rod 22; when the guiding rod 25 is located at the bottom end of the spiral chute 242, the claw 23 faces inwards; when the guiding rod 25 is located in the vertical chute 241, the claw 23 faces outwards;

[0035] The top ends of the locking mechanisms 2 are all drivingly connected to a driving mechanism 3 for driving the pull rod 22 to move up and down along the guiding groove 24;

[0036] The loading arm 4 is installed on the first mounting hole through the rotating mechanism 5.

[0037] In this embodiment, first, after adjusting the rotating mechanism 4 to a suitable angle, this device is fixedly installed with the loading arm 4, and then the sealing cap 1 is placed above the train tank car opening, so that the sealing ring 2 tightly presses the train tank car opening; when the air source and the direction control valve are connected, the driving mechanism 3 is driven by the air source to retract upwards, driving the pull rod 22 to move upwards. At this time, the guiding rod 25 slides upwards in the linear chute 241 following the movement track of the pull rod 22, so that the claw 23 clamps the train tank car opening, completing the locking of the locking mechanism 2;

[0038] When the air source and the direction control valve are disconnected, the driving mechanism 3 loses the driving power and moves downward, driving the pull rod 22 downward. At this time, the guide rod 25 follows the movement track of the pull rod 32 and slides downward in the linear chute 241, and then slides into the spiral chute 242. At this time, the pull rod 22 is driven by the guide rod 25 that has entered the spiral chute 242 to perform a rotational motion, and drives the claw 23 to rotate inward by 1 / 4 turn, so that this device can be taken out from the train tank car mouth.

[0039] This locking method of the spiral chute can lock the sealing cap at the train tank car mouth. When there is a maintenance ladder or other additional structures extending into the tank car mouth inside the tank car, it can still achieve complete sealing, with strong sealing performance and effectively avoid leakage.

[0040] In a preferred embodiment, as Figure 1 shown, a first sealing step 11 is provided around the outer periphery of the top of the sealing cap 1. A second sealing step 12 is provided on the outer periphery of the sealing cap 1 below the first sealing step 11. A first sealing ring 13 is fixedly provided on the bottom surface of the first sealing step 11, and a second sealing ring 14 is fixedly provided on the bottom surface of the second sealing step 12.

[0041] In this embodiment, when this device is fixedly installed on the train tank car mouth, the sealing cap 1 is placed on the train tank car mouth, so that the first sealing step 11 is sealingly connected to the outer ring of the train tank car mouth through the first sealing ring 13, and at the same time, the second sealing step 12 is sealingly connected to the inner ring of the train tank car mouth through the second sealing ring 14. The double sealing rings enhance the sealing performance of the device and can more effectively avoid leakage.

[0042] In a preferred embodiment, as Figure 1 shown, the driving mechanism 3 includes a driving cylinder 31 and a rotating connecting piece 32; the top end of the guide sleeve 21 is fixedly connected with a support sleeve 33, the driving cylinder 31 is fixedly arranged at the top end of the support sleeve 33, the piston rod of the driving cylinder 31 extends into the support sleeve 33 and is rotatably connected to the top end of the rotating connecting piece 32, and the bottom end of the rotating connecting piece 32 is fixedly connected with the pull rod 22.

[0043] In this embodiment, the driving cylinder 31 is mainly used to drive the components to move. When the air source and the direction control valve are connected, the driving cylinder 31 is affected by the air source and drives the piston rod to retract upward, so that the rotating connecting piece 32 moves upward and drives the pull rod 22 upward; when the air source and the direction control valve are disconnected, the piston rod 313 moves downward and drives the rotating connecting piece 32 and the pull rod 22 downward, so that the rotating connecting piece 32 makes a rotational motion. This rotating structure makes the device more flexible.

[0044] In a preferred embodiment, as Figure 1As shown, a third sealing ring is provided between the top end of the guiding sleeve 21 and the pull rod 22.

[0045] In this embodiment, the third sealing ring is arranged around the outer side of the pull rod 22. The top end of the guiding sleeve 21 and the pull rod 22 are sealingly connected through the third sealing ring, making their connection tighter. This sealing structure can enhance the firmness between components.

[0046] In a preferred embodiment, as Figure 1 and Figure 3 shown, the rotating mechanism 5 includes an inner spherical surface pressing ring 51, an inner spherical surface upper pressing ring 52, and an outer spherical surface fixing ring 53. The inner spherical surface pressing ring 51 is fixedly arranged on the top surface of the sealing cap 1 at the outer periphery of the first mounting hole. The inner spherical surface upper pressing ring 52 is fixedly installed on the top surface of the inner spherical surface pressing ring 51 through a first screw. The outer spherical surface fixing ring 53 is sleeved on the loading arm 4 and fixedly connected to the fixing flange 6 on the loading arm 4 through a second screw. The outer spherical surface fixing ring 53 is embedded between the inner spherical surface pressing ring 51 and the inner spherical surface upper pressing ring 52. The inner spherical surface of the inner spherical surface pressing ring 51 is adapted to the outer spherical surface of the lower half of the outer spherical surface fixing ring 53, and the inner spherical surface of the inner spherical surface upper pressing ring 52 is adapted to the outer spherical surface of the upper half of the outer spherical surface fixing ring 53.

[0047] In this embodiment, the rotating mechanism 5 can adjust the alignment degree of the docking between the loading arm 4 and the tank car opening. When the tank car opening cannot be aligned with the loading arm 4 due to dimensional errors, first loosen the first screw connecting the inner spherical surface pressing ring 51 and the inner spherical surface upper pressing ring 52. After adjusting the inner spherical surface pressing ring 51 and the inner spherical surface upper pressing ring 52 to the angular position that fits the tank car opening, then tighten the first screw to fixedly connect the inner spherical surface pressing ring 51 and the inner spherical surface upper pressing ring 52. This structure can effectively and flexibly adjust the docking angle between the loading arm and the tank car opening, avoiding affecting the sealing performance of the device.

[0048] In a preferred embodiment, as Figure 3 shown, a circumferential positioning ring groove is formed at the top of the inner circumference of the inner spherical surface pressing ring 51, and a circumferential positioning convex ring is arranged at the bottom of the inner spherical surface upper pressing ring 52 corresponding to the positioning ring groove.

[0049] In this embodiment, the positioning convex ring tightly presses and connects the inner spherical surface pressing ring 51 and the inner spherical surface upper pressing ring 52. This connection method has good sealing performance and can ensure the stability of the connection between the two components.

[0050] In a preferred embodiment, as Figure 3 shown, a fourth sealing ring is provided between the inner spherical surface pressing ring 51 and the sealing cap 1; a fifth sealing ring is provided between the inner spherical surface pressing ring 51 and the outer spherical surface fixing ring 53; a sixth sealing ring is provided between the outer spherical surface fixing ring 53 and the loading arm 4.

[0051] In this embodiment, the fourth sealing ring tightly connects the inner spherical surface pressing ring 51 and the sealing cap 1; the fifth sealing ring tightly connects the inner spherical surface pressing ring 51 and the outer spherical surface fixing ring 53; the sixth sealing ring tightly connects the outer spherical surface fixing ring 53 and the loading arm 4. This connection method has good sealing performance and ensures the stability of the connection between components.

[0052] In the description of this specification, terms such as "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0054] The above is only the preferred embodiment of this application and is not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A spiral slide-type locking device for a pneumatic train sealing cap, characterized in that: It comprises a sealing cap (1), a locking mechanism (2), a driving mechanism (3), a lifting pipe (4) and a rotating mechanism (5); A first mounting hole is provided in the middle of the sealing cap (1), and second mounting holes are symmetrically provided on both sides of the first mounting hole; The locking mechanism (2) is symmetrically installed on the second mounting holes on both sides of the sealing cap (1); the locking mechanism (2) includes a guide sleeve (21), a pull rod (22) and a claw (23); the top of the guide sleeve (21) is fixedly connected to the second mounting hole; guide grooves (24) are centrally symmetrically arranged on both sides of the guide sleeve (21); the guide grooves (24) include a vertical slide groove (241) and a spiral slide groove (242) connected to the bottom end of the vertical slide groove (241); the pull rod (22) and the claw (23) are fixedly connected to the second mounting hole; The rod (22) passes through the guide sleeve (21), and the two sides of the pull rod (22) are symmetrically connected with guide rods (25), and the guide rods (25) pass through the guide groove (24) one by one. The claw (23) is horizontally arranged, and one end of the claw (23) is fixedly connected to the bottom end of the pull rod (22); when the guide rod (25) is located at the bottom end of the spiral slide groove (242), the claw (23) faces inward; when the guide rod (25) is located in the vertical slide groove (241), the claw (23) faces outward; The top end of the locking mechanism (2) is drivingly connected to the driving mechanism (3) for driving the pull rod (22) to move up and down along the guide groove (24); The lifting pipe (4) is mounted on the first mounting hole via the rotating mechanism (5).

2. The spiral slide groove type locking device for the sealing cap of a pneumatic train according to claim 1, characterized in that: A circle of first sealing steps (11) is arranged on the outer periphery of the top of the sealing cap (1); a second sealing step (12) is arranged on the outer periphery of the sealing cap (1) below the first sealing step (11); a circle of first sealing rings (13) is fixedly arranged on the bottom surface of the first sealing step (11); and a circle of second sealing rings (14) is fixedly arranged on the bottom surface of the second sealing step (12).

3. The spiral slide groove type locking device for the sealing cap of a pneumatic train according to claim 1, characterized in that: The driving mechanism (3) comprises a driving cylinder (31) and a rotating connecting member (32); the top end of the guide sleeve (21) is fixedly connected to a supporting sleeve (33), the driving cylinder (31) is fixedly arranged at the top end of the supporting sleeve (33), the piston rod of the driving cylinder (31) extends into the supporting sleeve (33) and is rotatably connected to the top end of the rotating connecting member (32), and the bottom end of the rotating connecting member (32) is fixedly connected to the pull rod (22).

4. The spiral slide groove type locking device for the sealing cap of a pneumatic train according to claim 1, characterized in that: A third sealing ring is provided between the top end of the guide sleeve (21) and the pull rod (22).

5. The spiral slide groove type locking device for the sealing cap of a pneumatic train according to claim 1, characterized in that: The rotating mechanism (5) comprises an inner spherical lower pressure ring (51), an inner spherical upper pressure ring (52) and an outer spherical fixing ring (53); the inner spherical lower pressure ring (51) is fixedly arranged on the top surface of the sealing cap (1) and is located on the outer periphery of the first mounting hole; the inner spherical upper pressure ring (52) is fixedly installed on the top surface of the inner spherical lower pressure ring (51) by a first screw; the outer spherical fixing ring (53) is sleeved on the crane tube (4) and fixedly connected to the fixing flange (6) on the crane tube (4) by a second screw; the outer spherical fixing ring (53) is embedded in the inner spherical lower pressure ring (51) and the inner spherical upper pressure ring (52); the inner spherical surface of the inner spherical lower pressure ring (51) is matched with the outer spherical surface of the lower half of the outer spherical fixing ring (53); the inner spherical surface of the inner spherical upper pressure ring (52) is matched with the outer spherical surface of the upper half of the outer spherical fixing ring (53).

6. The spiral slide groove type locking device for the sealing cap of a pneumatic train according to claim 5, characterized in that: A circle of positioning ring groove is provided at the top of the inner circumference of the inner spherical lower pressure ring (51), and a circle of positioning convex ring is provided at the bottom of the inner spherical upper pressure ring (52) corresponding to the positioning ring groove.

7. The spiral slide groove type locking device for the sealing cap of a pneumatic train according to claim 5, characterized in that: A fourth sealing ring is provided between the inner spherical lower pressure ring (51) and the sealing cap (1); a fifth sealing ring is provided between the inner spherical lower pressure ring (51) and the outer spherical fixing ring (53); and a sixth sealing ring is provided between the outer spherical fixing ring (53) and the crane pipe (4).

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