Emergency cut-off device for tank car

Abstract

The utility model relates to the field of dangerous chemical transportation safety, in particular to a tank car emergency cut-off device which comprises a first pipe body and further comprises a second pipe body, the second pipe body is arranged at one end of the first pipe body, and a first flange and a second flange are arranged outside the first pipe body and the second pipe body respectively. The first pipe body and the second pipe body are fixedly connected through the first flange and the second flange; the cutting-off unit is arranged in the first pipe body and the second pipe body, the cutting-off unit comprises a telescopic air bag and a fusible rod, the fusible rod is disconnected to drive the telescopic air bag to be compressed, and then the first pipe body is blocked to cut off circulation; the cut-off unit comprises a blocking piece arranged in the first pipe body and used for driving the telescopic air bag to be compressed, the emergency cut-off device for the tank car can cut off circulation in an emergency mode when collision occurs during transportation, and can also cut off circulation in an emergency mode when a fire disaster occurs, and therefore the leakproof effect can be enhanced.

Description

Technical Field

[0001] This utility model relates to the field of hazardous chemical transportation safety, specifically an emergency shut-off device for tank trucks. Background Technology

[0002] Emergency shut-off during tanker transport is a key safety measure to quickly stop the flow of media in the event of a sudden danger, prevent the spread of flammable and toxic substances that could lead to a larger accident, ensure personnel safety, reduce environmental pollution and property damage, and prevent the escalation of transport accidents.

[0003] The utility model patent with authorization publication number CN212537499U provides an emergency shut-off valve for a liquid chlorine tanker, which also belongs to the technical field of "safety in the transportation of hazardous chemicals". The protected claim is as follows: "It includes a liquid chlorine tank, a connecting pipe connected to the end of the liquid chlorine tank, a manual valve sealed to the end of the connecting pipe, a shut-off valve sealed to the end of the manual valve, a shut-off valve flange at the end of the shut-off valve, a sealing ring at the end of the shut-off valve flange, a valve chamber inside the shut-off valve, a partition plate inside the valve chamber, a through hole at the top of the partition plate, a gas chamber below the partition plate, a fusible plug sealed at the bottom of the gas chamber, a shut-off rod slidingly arranged inside the shut-off valve, a valve core on the outer wall of the shut-off rod, a piston at the bottom of the shut-off rod, the piston slidingly arranged inside the gas chamber, a manual valve flange at the end of the manual valve, and a sealing ring located between the manual valve flange and the shut-off valve flange. This utility model has good sealing performance, can reduce the corrosion of the shut-off valve by liquid chlorine, and can automatically close in case of an accident."

[0004] Although the device can cut off the valve in a timely manner by melting the fusible plug at high temperature, the connection end of the shut-off valve is prone to loosening during long-term transportation. Once a collision occurs, the connection end is very easy to break. The fusible plug of this device can only melt at high temperature and cannot cope with the situation of collision. Therefore, we propose an emergency shut-off device for tank trucks. Utility Model Content

[0005] One of the technical problems this application aims to solve is that the connection end of the shut-off valve is prone to loosening during long-term transportation, and once a collision occurs, the connection end is very likely to break and leak.

[0006] To address the aforementioned technical problems, this application provides an emergency shut-off device for tank trucks, comprising a first pipe body, and further comprising:

[0007] The second pipe body is disposed at one end of the first pipe body. The first pipe body and the second pipe body are respectively provided with a first flange and a second flange. The first pipe body and the second pipe body are fixedly connected by the first flange and the second flange.

[0008] A cutting unit is disposed in the first tube and the second tube. The cutting unit includes a telescopic airbag and a fusible rod. The fusible rod disconnects to compress the telescopic airbag, thereby blocking the first tube and cutting off the flow.

[0009] In some embodiments, the cutting unit includes a blocking member disposed within a first tube for driving the telescopic airbag to compress, thereby blocking the first tube and cutting off the flow. A pushing member is disposed within the first tube for driving the screw and the second spring to extend and retract. A fixing member is disposed within the second tube for driving the lead screw to fix the fusible rod.

[0010] In some embodiments, the blocking component includes a support frame fixedly connected to the first tube body, a telescopic airbag fixedly connected to one side of the support frame, three damping rods disposed inside the telescopic airbag, and a first spring sleeved on the outside of each of the three damping rods.

[0011] In some embodiments, the pusher includes a first ring body fixedly connected to a first tube body, a screw inserted through the first ring body, a second ring body fixedly connected to one end of the screw body, a plurality of push plates fixedly connected to the second ring body, a third ring body fixedly connected to the other end of the screw body, a plurality of support plates fixedly connected to the third ring body, and a fusible rod fixedly connected to one side of the support plate.

[0012] In some embodiments, the screw is threaded with a nut and a second spring is sleeved on the screw. The screw, nut and second spring are configured in multiple groups, and all multiple groups are arranged around the central axis of the first ring body.

[0013] In some embodiments, the plurality of push plates are positioned opposite to the telescopic airbag, and the plurality of push plates are coaxial with the central axis of the telescopic airbag.

[0014] In some embodiments, the fastener includes a housing with a top of a second flange, a lead screw inside a second tube, the lead screw threaded through the housing and the second flange and threadedly connected to a fusible rod, a connecting block fixedly connected to the inside of the second flange, and the bottom end of the lead screw threadedly connected to the connecting block.

[0015] This utility model has at least the following beneficial effects:

[0016] By setting up a cutting unit, when a collision occurs during transportation, the first tube and the second tube will break apart, which will cause the fusible rod to break apart. After the fusible rod breaks apart, it will cause the pusher to squeeze the telescopic airbag. The telescopic airbag is compressed and its periphery will expand outward. The outward expansion will block the first tube, thereby cutting off the flow in an emergency.

[0017] Similarly, in the event of a fire, the high temperature will melt the fusible rod, which will compress the telescopic airbag and block the first tube, thereby cutting off the flow in an emergency.

[0018] In summary, this device can shut off the flow in case of a collision during transportation, and it will also shut off the flow in case of a fire, thus enhancing the leak prevention effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This utility model Figure 1 A sectional view;

[0021] Figure 3 This is a schematic diagram of the pushing component structure of this utility model;

[0022] Figure 4 This utility model Figure 1 Exploded view;

[0023] Figure 5 This is a schematic diagram of the fastener structure of this utility model.

[0024] In the diagram: 1. First pipe body; 2. Second pipe body; 3. First flange; 4. Second flange; 5. Cut-off unit; 51. Blocking component; 511. Support frame; 512. Telescopic airbag; 513. Damping rod; 514. First spring; 52. Pushing component; 521. First ring body; 522. Screw; 523. Second ring body; 524. Push plate; 525. Third ring body; 526. Support plate; 527. Fusible rod; 528. Nut; 529. Second spring; 53. Fixing component; 531. Box body; 532. Lead screw; 533. Connecting block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0026] Please see Figures 1-5 This utility model provides a technical solution:

[0027] An emergency shut-off device for tank trucks includes a first pipe body 1, a second pipe body 2, and a shut-off unit 5. The second pipe body 2 is disposed at one end of the first pipe body 1. A first flange 3 and a second flange 4 are respectively disposed on the outside of the first pipe body 1 and the second pipe body 2. The first pipe body 1 and the second pipe body 2 are fixedly connected by the first flange 3 and the second flange 4. The shut-off unit 5 is disposed inside the first pipe body 1 and the second pipe body 2. The shut-off unit 5 includes a telescopic air bladder 512 and a fusible rod 527. When the fusible rod 527 is disconnected, it causes the telescopic air bladder 512 to compress, thereby blocking the first pipe body 1 and cutting off the flow. It should be noted that the flowing gas or liquid is transported to the second pipe body 2 through the first pipe body 1 and then output to the outside of the tank truck through the second pipe body 2. Therefore, simply blocking the first pipe body 1 can cut off the flow and prevent tank truck leakage. In addition, a shut-off unit 5 can also be disposed at the connection end of the second pipe body 2 with external equipment to further prevent leakage.

[0028] The cutting-off unit 5 includes a blocking member 51 disposed in the first tube 1, which is used to drive the telescopic airbag 512 to compress, thereby blocking the first tube 1 and cutting off the flow. The blocking member 51 includes a support frame 511 fixedly connected in the first tube 1. The telescopic airbag 512 is fixedly connected to one side of the support frame 511. Three damping rods 513 are disposed in the telescopic airbag 512. A first spring 514 is sleeved on the outside of each of the three damping rods 513. The damping rods 513 are existing technology and will not be described in detail here.

[0029] A pusher 52 is provided inside the first tube 1 to drive the screw 522 and the second spring 529 to extend and retract. The pusher 52 includes a first ring 521 fixedly connected inside the first tube 1, a screw 522 inserted inside the first ring 521, a second ring 523 fixedly connected to one end of the screw 522, a plurality of push plates 524 fixedly connected inside the second ring 523, and a third ring 525 fixedly connected to the other end of the screw 522, a plurality of support plates 526 fixedly connected inside the third ring 525, with one side of the support plates 526 fixedly connected to... A fusible rod 527 is connected; a nut 528 is threaded onto the external thread of a screw 522, and a second spring 529 is sleeved on the outer sleeve of the screw 522. The screw 522, nut 528, and second spring 529 are arranged in multiple groups, all of which are arranged around the central axis of the first ring body 521; multiple push plates 524 are positioned opposite to the telescopic airbag 512, and the multiple push plates 524 are coaxial with the central axis of the telescopic airbag 512. In this way, the push plates 524 can push the telescopic airbag 512 to compress it. After compression, the telescopic airbag 512 expands outward to block the first tube body 1.

[0030] The fixing member 53 inside the second tube body 2 is used to drive the screw 532 to fix the fusible rod 527. The fixing member 53 includes a box body 531 set on the top of the second flange 4. The screw 532 is set inside the second tube body 2. The screw 532 is threaded through the box body 531 and the second flange 4 and threadedly connected to the fusible rod 527. A connecting block 533 is fixedly connected to the inside of the second flange 4. The bottom end of the screw 532 is threadedly connected to the connecting block 533. The fusible rod 527 is made of fusible material and has a certain hardness, which can be used for pulling connection.

[0031] In use, the fusible rod 527 is first pulled out of the first tube 1, thereby pulling out multiple screws 522, that is, moving the second ring 523 and the push plate 524 outward away from the telescopic airbag 512. Then, the screw 532 is used to fix one end of the fusible rod 527. When a collision occurs during transportation, due to the loosening of the bolt connection between the first flange 3 and the second flange 4, the connection end of the first tube 1 and the second tube 2 is broken, causing the fusible rod 527 to break. After breaking, the multiple screws 522 move inward under the rebound of the second spring 529, thereby moving the second ring 523 and the push plate 524 inward. The push plate 524 squeezes the telescopic airbag 512. After the telescopic airbag 512 is compressed, its periphery will expand outward, and after expansion, it will block the first tube 1, thereby cutting off the flow. Example 2

[0032] Please see Figure 5 This utility model provides a technical solution:

[0033] Unlike Embodiment 1, the blocking component 51 includes a support frame 511 fixedly connected inside the first tube 1. A telescopic airbag 512 is fixedly connected to one side of the support frame 511. Three damping rods 513 are disposed inside the telescopic airbag 512, and a first spring 514 is sleeved on the outside of each of the three damping rods 513. The pushing component 52 includes a first ring 521 fixedly connected inside the first tube 1. A screw 522 is inserted inside the first ring 521, and a second ring 523 is fixedly connected to one end of the screw 522. Multiple push plates 524 are fixedly connected inside the second ring body 523. A third ring body 525 is fixedly connected to the other end of the screw 522. Multiple support plates 526 are fixedly connected inside the third ring body 525. A fusible rod 527 is fixedly connected to one side of the support plate 526. A nut 528 is threaded onto the external thread of the screw 522. A second spring 529 is sleeved on the outer sleeve of the screw 522. The hardness of the fusible rod 527 can adapt to the rebound force of the second spring 529, so as to prevent the fusible rod 527 from breaking when it is not impacted.

[0034] Furthermore, the nut 528 can be rotated to shorten the return stroke of the second spring 529, thereby adjusting the return force of the entire pusher 52 and the outward expansion of the telescopic airbag 512 to adjust the blocking force.

[0035] The fastener 53 includes a box 531 on the top of the second flange 4, a screw 532 inside the second pipe 2, the screw 532 being threaded through the box 531 and the second flange 4 and threadedly connected to a fusible rod 527, a connecting block 533 being fixedly connected to the inside of the second flange 4, and the bottom end of the screw 532 being threadedly connected to the connecting block 533. The box 531 needs to be welded closed to prevent leakage.

[0036] Similarly, in the event of a fire, the high temperature will melt the fusible rod 527, thereby breaking the connection between the fixing member 53 and the pushing member 52. Multiple screws 522 will move inward under the rebound of the second spring 529, which will in turn drive the second ring body 523 and the push plate 524 to move inward. The push plate 524 will squeeze the telescopic airbag 512. After the telescopic airbag 512 is compressed, its periphery will expand outward, which will block the first tube 1, thereby cutting off the flow.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An emergency shut-off device for tank trucks, comprising a first pipe body (1), characterized in that: It also includes: The second pipe body (2) is disposed at one end of the first pipe body (1). The first pipe body (1) and the second pipe body (2) are respectively provided with a first flange (3) and a second flange (4). The first pipe body (1) and the second pipe body (2) are fixedly connected by the first flange (3) and the second flange (4). The cutting unit (5) is disposed in the first tube (1) and the second tube (2). The cutting unit (5) includes a telescopic airbag (512) and a fusible rod (527). The fusible rod (527) disconnects and drives the telescopic airbag (512) to compress, thereby blocking the first tube (1) and cutting off the flow.

2. The tank truck emergency shut-off device according to claim 1, characterized in that: The cutting unit (5) includes a blocking member (51) disposed in the first tube (1) for driving the telescopic airbag (512) to compress, thereby blocking the first tube (1) to cut off the flow. A pushing member (52) is disposed in the first tube (1) for driving the screw (522) and the second spring (529) to extend and retract. A fixing member (53) is disposed in the second tube (2) for driving the lead screw (532) to fix the fusible rod (527).

3. The tank truck emergency shut-off device according to claim 2, characterized in that: The blocking component (51) includes a support frame (511) fixedly connected inside the first tube (1). A telescopic airbag (512) is fixedly connected to one side of the support frame (511). Three damping rods (513) are provided inside the telescopic airbag (512), and a first spring (514) is sleeved on the outside of each of the three damping rods (513).

4. The tank truck emergency shut-off device according to claim 2, characterized in that: The pusher (52) includes a first ring (521) fixedly connected inside the first tube (1), a screw (522) inserted inside the first ring (521), a second ring (523) fixedly connected to one end of the screw (522), a plurality of push plates (524) fixedly connected inside the second ring (523), a third ring (525) fixedly connected to the other end of the screw (522), a plurality of support plates (526) fixedly connected inside the third ring (525), and a fusible rod (527) fixedly connected to one side of the support plate (526).

5. The tank truck emergency shut-off device according to claim 4, characterized in that: The screw (522) is threaded with a nut (528), and the screw (522) is fitted with a second spring (529). The screw (522), nut (528) and second spring (529) are arranged in multiple groups, and all of them are arranged around the central axis of the first ring body (521).

6. The tank truck emergency shut-off device according to claim 4, characterized in that: The multiple push plates (524) are positioned opposite to the telescopic airbag (512), and the central axis of the multiple push plates (524) and the telescopic airbag (512) are coaxial.

7. The tank truck emergency shut-off device according to claim 2, characterized in that: The fastener (53) includes a box (531) with the top of the second flange (4), a screw (532) is provided inside the second tube (2), the screw (532) is threaded through the box (531) and the second flange (4) and threadedly connected to a fusible rod (527), a connecting block (533) is fixedly connected to the inside of the second flange (4), and the bottom end of the screw (532) is threadedly connected to the connecting block (533).

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