ESD emergency cut-off device

Abstract

The utility model relates to the technical field of protection devices, and provides an ESD emergency cut-off device which is used in cooperation with a pipeline and comprises a cut-off valve fixedly installed on the pipeline. The actuator comprises a shell, a partition plate and a spring, the shell is fixedly installed at the top of the block valve, the partition plate is in sliding contact with the inner wall of the shell, the partition plate is fixedly connected with a valve rod of the block valve, the partition plate and the inner wall of the shell are kept sealed, and the interior of the shell is divided into an upper sealing cavity and a lower containing cavity by the partition plate; the lower containing cavity is located below the upper sealing cavity and communicates with the outside, and the spring enables the partition plate to have the trend of moving downwards. An inlet of the quick discharge valve is communicated with the upper sealing cavity, and an outlet of the quick discharge valve is communicated with the outside; and the mechanical detector is used for detecting dangerous cases encountered by the pipeline, and when the mechanical detector works, the inlet of the quick discharge valve and the outlet of the quick discharge valve are in a communicating state.

Description

Technical Field

[0001] This utility model relates to the field of protection device technology, specifically to an ESD emergency cutoff device. Background Technology

[0002] In the chemical industry, pipelines are often used to transport media (usually gases or liquids). Some of these media are flammable and explosive. When a pipeline encounters a hazard (such as a fire or abnormal pressure of the medium inside the pipeline), if the medium continues to be transported, it can easily lead to an escalation of the hazard. Therefore, protective devices are generally installed on pipelines to cut off the continued transport of the medium when a pipeline encounters a hazard.

[0003] However, traditional protection devices rely on electricity and electronic components to maintain operation. When the pipeline encounters a danger, the entire device may fail due to a power outage, resulting in poor reliability. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an ESD emergency shut-off device that can automatically cut off the continued transport of media in pipelines in dangerous situations, thus offering higher reliability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ESD emergency shut-off device, used in conjunction with a pipeline, comprising:

[0006] A shut-off valve, which is fixedly installed on the pipeline;

[0007] An actuator, comprising a housing, a partition, and a spring, wherein the housing is fixedly mounted on the top of the shut-off valve, the partition slides in contact with the inner wall of the housing, the partition is fixedly connected to the valve stem of the shut-off valve and maintains a seal with the inner wall of the housing, the partition divides the interior of the housing into an upper sealing cavity and a lower receiving cavity, the lower receiving cavity being located below the upper sealing cavity and communicating with the outside, and the spring causing the partition to have a downward tendency to move;

[0008] A quick-release valve, wherein the inlet of the quick-release valve is connected to the upper sealing cavity, and the outlet of the quick-release valve is connected to the outside;

[0009] A mechanical detector is used to detect potential hazards encountered by the pipeline. When the mechanical detector is in operation, the inlet and outlet of the quick-release valve are in a connected state.

[0010] Furthermore, the quick-release valve includes a first valve body and a first piston. The first piston slides in contact with the inner wall of the first valve body and remains sealed. The first piston simultaneously blocks the inlet and outlet of the quick-release valve. The first piston divides the interior of the first valve body into a first sealing cavity and a first receiving cavity. The first receiving cavity is located above the first sealing cavity and communicates with the outside.

[0011] The mechanical detector is used to control the opening and closing of the first sealed cavity.

[0012] Furthermore, the number of mechanical detectors is at least two.

[0013] Furthermore, it also includes a relay valve, the inlet of which is connected to the first sealing cavity, and the outlet of which is connected to the outside. The relay valve includes a second valve body and a second piston. The second piston slides in contact with the inner wall of the second valve body and remains sealed. The second piston simultaneously blocks the inlet and outlet of the relay valve. The second piston divides the interior of the second valve body into a second sealing cavity and a second receiving cavity. The second receiving cavity is located above the second sealing cavity and is connected to the outside.

[0014] Each of the mechanical detectors can individually control the opening and closing of the second sealed cavity.

[0015] Furthermore, the mechanical detector includes a high-low pressure pilot valve, which is fixedly installed on the pipeline for detecting the pressure inside the pipeline. The inlet of the high-low pressure pilot valve is connected to the second sealing cavity, and the outlet of the high-low pressure pilot valve is connected to the outside.

[0016] Furthermore, the mechanical detector includes a detection tube and a fusible plug, with the first end of the detection tube communicating with the second sealing cavity, and the fusible plug used to seal the second end of the detection tube.

[0017] Furthermore, the sealing medium in the upper sealing cavity, the first sealing cavity, and the second sealing cavity is a gas or a liquid.

[0018] The beneficial effects of this utility model are as follows: This utility model provides an ESD emergency shut-off device. When a mechanical detector detects a hazard in the pipeline, it controls the connection between the inlet and outlet of the quick-release valve. At this time, the sealing medium in the upper sealing chamber flows outward. Under the action of a spring, the baffle moves the valve stem of the shut-off valve downward, automatically cutting off the continued transport of the medium in the pipeline. This device is a fully mechanical structure, independent of electronic components and external power, thus offering higher reliability. Attached Figure Description

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

[0020] Figure 2 This is a schematic diagram of the internal cross-sectional structure of a quick-release valve;

[0021] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the relay valve.

[0022] Reference numerals: 10-pipeline, 20-shut-off valve, 30-actuator, 31-housing, 32-diaphragm, 33-spring, 34-upper sealing cavity, 35-lower receiving cavity, 40-quick-exhaust valve, 41-first valve body, 42-first piston, 43-first sealing cavity, 44-first receiving cavity, 45-first pipeline, 51-high and low pressure pilot valve, 52-detection tube, 53-fusible plug, 54-third pipeline, 60-relay valve, 61-second valve body, 62-second piston, 63-second sealing cavity, 64-second receiving cavity, 65-second pipeline. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] In this application, unless otherwise expressly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In the description of this application, it should be understood that the terms "longitudinal", "horizontal", "level", "top", "bottom", "upper", "lower", "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0027] like Figures 1-3As shown, this utility model provides an ESD emergency shut-off device, which is used in conjunction with pipeline 10, including shut-off valve 11, actuator 30, quick-release valve 40 and mechanical detector.

[0028] The shut-off valve 11 is fixedly installed on the pipeline 10.

[0029] The actuator 30 includes a housing 31, a partition 32, and a spring 33. The housing 31 is fixedly mounted on top of the shut-off valve 11. The partition 32 is disposed inside the housing 31, slidingly contacting the inner wall of the housing 31. The partition 32 is fixedly connected to the valve stem of the shut-off valve 11 and maintains a seal with the inner wall of the housing 31. The partition 32 divides the interior of the housing 31 into an upper sealing cavity 34 and a lower receiving cavity 35. The lower receiving cavity 35 is located below the upper sealing cavity 34 and communicates with the outside. The spring 33 is disposed in the lower receiving cavity 35. The first end of the spring 33 is fixedly connected to the inner wall of the housing 31, and the second end of the spring 33 is fixedly connected to the partition 32. The spring 33 causes the partition 32 to have a downward tendency to move.

[0030] The inlet of the quick-release valve 40 is connected to the upper sealing cavity 34 through the first pipe 45, and the outlet of the quick-release valve 40 is connected to the outside.

[0031] The mechanical detector is used to detect hazards encountered by line 10 of pipe 52. When the mechanical detector is working, the inlet and outlet of the quick-release valve 40 are in a connected state.

[0032] When pipeline 10 is not in danger, the upper sealing cavity 34 is in a sealed state. Under pressure, the baffle 32 drives the valve stem of the shut-off valve 11 to be in an open state. At this time, the spring 33 is in an extended state, and pipeline 10 normally transports the medium.

[0033] When the mechanical detector detects a hazard in pipeline 10, it controls the inlet and outlet of the quick-release valve 40 to be connected. At this time, the sealing medium in the upper sealing chamber 34 enters the quick-release valve 40 through the first pipe 45 and flows out through its outlet. Simultaneously, under the action of the spring 33, the baffle 32 moves the valve stem of the shut-off valve 11 downwards, automatically cutting off the continued transport of the medium in pipeline 10, thus providing protection and preventing the escalation of the hazard.

[0034] This device is a fully mechanical structure and does not rely on electronic components or external power, thus it is more reliable.

[0035] In one embodiment, the quick-release valve 40 includes a first valve body 41 and a first piston 42. The first piston 42 is disposed inside the first valve body 41, and slides in contact with the inner wall of the first valve body 41 while maintaining a seal. The first piston 42 simultaneously blocks both the inlet and outlet of the quick-release valve 40. The first piston 42 divides the interior of the first valve body 41 into a first sealing cavity 43 and a first receiving cavity 44. The first receiving cavity 44 is located above the first sealing cavity 43 and communicates with the outside.

[0036] The mechanical detector is used to control the opening and closing of the first sealed cavity 43.

[0037] When pipeline 10 is not in danger, the first sealing chamber 43 is in a sealed state. Under pressure, the first piston 42 simultaneously blocks the inlet and outlet of the quick exhaust valve 40.

[0038] When pipeline 10 encounters an emergency, the mechanical detector controls the opening of the first sealing chamber 43, depressurizing the sealing medium inside the first sealing chamber 43. Under the action of gravity, the first piston 42 will move downward until the inlet and outlet of the quick exhaust valve 40 are connected. The sealing medium in the upper sealing chamber 34 will then enter the quick exhaust valve 40 through the first pipe 45 and flow out through the outlet of the quick exhaust valve 40.

[0039] This quick-release valve 40 has a simple structure, is easy to produce and manufacture, and is a purely mechanical structure without the participation of electronic components or reliance on external power, thus making it more reliable.

[0040] In one embodiment, the number of mechanical detectors is at least two.

[0041] In one embodiment, a relay valve 60 is further included. The inlet of the relay valve 60 is connected to the first sealing cavity 43 via a second pipe 65, and the outlet of the relay valve 60 is connected to the outside. The relay valve 60 includes a second valve body 61 and a second piston 62. The second piston 62 slides in contact with the inner wall of the second valve body 61 and maintains a seal. The second piston 62 simultaneously blocks both the inlet and outlet of the relay valve 60. The second piston 62 divides the interior of the second valve body 61 into a second sealing cavity 63 and a second receiving cavity 64. The second receiving cavity 64 is located above the second sealing cavity 63 and is connected to the outside.

[0042] Each mechanical detector can individually control the opening and closing of the second sealed cavity 63.

[0043] When pipeline 10 is not in danger, the second sealing chamber 63 is in a sealed state. Under pressure, the second piston 62 simultaneously blocks the inlet and outlet of the relay valve 60.

[0044] When pipeline 10 encounters an emergency, the mechanical detector controls the second sealing chamber 63 to open, and the sealing medium in the second sealing chamber 63 is depressurized. Under the action of gravity, the second piston 62 will move downward until the inlet and outlet of the relay valve 60 are connected. The sealing medium in the first sealing chamber 43 will enter the relay valve 60 through the second pipe 65 and flow out through the outlet of the relay valve 60.

[0045] This relay valve 60 has a simple structure, is easy to produce and manufacture, and is a purely mechanical structure without the participation of electronic components or reliance on external power, thus making it more reliable.

[0046] The relay valve 60 is designed to accommodate the use of multiple mechanical detectors. When one of the mechanical detectors detects a hazard, it can trigger the device to start, thereby controlling the shut-off valve 11 to automatically cut off the continued transport of the medium in the pipeline 10. This allows the device to cope with a variety of different hazards and has better applicability.

[0047] In one embodiment, the mechanical detector includes a high-low pressure pilot valve 51. The high-low pressure pilot valve 51 is fixedly installed on the pipeline 10 and is used to detect the pressure inside the pipeline 10. The inlet of the high-low pressure pilot valve 51 is connected to the second sealing cavity 63 through a third pipe 54, and the outlet of the high-low pressure pilot valve 51 is connected to the outside.

[0048] The high and low pressure pilot valve 51 is a mechanical valve. When the pressure of the medium transported in the pipeline 10 is detected to be higher or lower than the safety threshold, the inlet and outlet of the high and low pressure pilot valve 51 will be connected, thereby depressurizing the sealing medium in the second sealing chamber 63 and flowing out from the outlet of the high and low pressure pilot valve 51, thus triggering the start of this device. Therefore, this device can deal with the danger of abnormal medium pressure in the pipeline 10.

[0049] In one embodiment, the mechanical detector includes a detection tube 52 and a fusible plug 53, with the first end of the detection tube 52 communicating with the second sealing cavity 63, and the fusible plug 53 used to seal the second end of the detection tube 52.

[0050] When a fire occurs, the fusible plug 53 will melt due to heat, thereby depressurizing the sealing medium in the second sealing cavity 63 and allowing it to flow out from the detection tube 52, thus triggering the device to start. Therefore, this device can cope with fire hazards.

[0051] In one embodiment, the sealing medium in the first sealing cavity 43 and the second sealing cavity 63 is gas or liquid, utilizing the principles of air pressure and hydraulic pressure.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An ESD emergency shut-off device for use in conjunction with a pipeline, comprising: include: A shut-off valve, which is fixedly installed on the pipeline; An actuator, comprising a housing, a partition, and a spring, wherein the housing is fixedly mounted on the top of the shut-off valve, the partition slides in contact with the inner wall of the housing, the partition is fixedly connected to the valve stem of the shut-off valve and maintains a seal with the inner wall of the housing, the partition divides the interior of the housing into an upper sealing cavity and a lower receiving cavity, the lower receiving cavity being located below the upper sealing cavity and communicating with the outside, and the spring causing the partition to have a downward tendency to move; A quick-release valve, wherein the inlet of the quick-release valve is connected to the upper sealing cavity, and the outlet of the quick-release valve is connected to the outside; A mechanical detector is used to detect potential hazards encountered by the pipeline. When the mechanical detector is in operation, the inlet and outlet of the quick-release valve are in a connected state.

2. An ESD emergency cut-off device according to claim 1, characterized in that: The quick-release valve includes a first valve body and a first piston. The first piston slides in contact with the inner wall of the first valve body and remains sealed. The first piston simultaneously blocks the inlet and outlet of the quick-release valve. The first piston divides the interior of the first valve body into a first sealing cavity and a first receiving cavity. The first receiving cavity is located above the first sealing cavity and communicates with the outside. The mechanical detector is used to control the opening and closing of the first sealed cavity.

3. An ESD emergency cut-off device according to claim 1, characterized in that: The number of mechanical detectors is at least two.

4. An ESD emergency cut-off device according to claim 2, characterized in that: It also includes a relay valve, the inlet of which is connected to the first sealing cavity, and the outlet of which is connected to the outside. The relay valve includes a second valve body and a second piston. The second piston slides in contact with the inner wall of the second valve body and remains sealed. The second piston simultaneously blocks the inlet and outlet of the relay valve. The second piston divides the interior of the second valve body into a second sealing cavity and a second receiving cavity. The second receiving cavity is located above the second sealing cavity and is connected to the outside. Each of the mechanical detectors can individually control the opening and closing of the second sealed cavity.

5. An ESD emergency cut-off device according to claim 4, characterized in that: The mechanical detector includes a high-low pressure pilot valve, which is fixedly installed on the pipeline and used to detect the pressure inside the pipeline. The inlet of the high-low pressure pilot valve is connected to the second sealing cavity, and the outlet of the high-low pressure pilot valve is connected to the outside.

6. An ESD emergency cut-off device according to claim 4, characterized in that: The mechanical detector includes a detection tube and a fusible plug. The first end of the detection tube is connected to the second sealing cavity, and the fusible plug is used to seal the second end of the detection tube.

7. An ESD emergency cut-off device according to claim 5, characterized in that: The sealing medium in the upper sealing cavity, the first sealing cavity, and the second sealing cavity is a gas or a liquid.

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