Pipeline fusing protection device

Abstract

The utility model relates to the technical field of pipeline fusing protection, and discloses a pipeline fusing protection device which comprises an actuator, a fixing support of a valve body and a limit switch bearing, a limit switch support is fixedly connected outside the limit switch bearing, and a limit switch dial plate is rotatably connected to the top of the limit switch support. A limiting switch dial plate is fixedly connected to the top of the limiting switch, and an elastic assembly used for providing elastic force is fixedly connected to the top of a fixing support of the actuator and the valve body. According to the utility model, the limit switch and the actuator are fixed through the limit switch bracket, the limit switch dial plate and the actuator are connected through the bearing, and the limit switch dial plate capable of sending out a signal after being triggered is arranged, so that the valve can be automatically and quickly closed or opened according to quantified environment temperature before a dangerous case occurs or when the dangerous case occurs; meanwhile, a feedback signal can be sent out, and the valve can be manually controlled to be opened or closed again.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline fuse protection, in particular to a pipeline fuse protection device. Background Art

[0002] A pipeline fuse protection device is a mechanical safety device used in industrial systems. It is designed to melt the fuse link on the fuse valve when the valve is at a set ambient high temperature, thereby triggering the fuse valve to close and closing the pipeline where the fuse valve is located to prevent the leakage of dangerous gases or liquids circulating in the pipeline.

[0003] In the prior art, manual shut-off valves, electric or pneumatic shut-off valves are still commonly used in some devices. However, due to the special environment, the control method of these valves makes it impossible for operators to quickly close the shut-off valves in an emergency during accidents such as fires and explosions. Or, due to the harsh conditions at the accident site, operators cannot get close to the shut-off valves, or the electric or pneumatic shut-off valve system functions are damaged. Or, when the shut-off valve coil is accidentally charged, the automatic shut-off valve will automatically open, making it impossible to achieve the purpose of emergency pipeline shut-off. This may cause the leakage of flammable gases or liquids, solvents, alcohol, toxic liquids or any other potentially dangerous media, which may cause certain personal injuries to the personnel who implement the shut-off operation, or lead to the failure to close the pipeline in time, further expanding the accident disaster. For this reason, a pipeline fuse protection device is proposed to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a pipeline fuse protection device, which aims to improve the problem that the pipeline fuse protection in the prior art cannot be well limited.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The pipeline fuse protection device includes a fixing bracket for the actuator and the valve body, and a limit switch bearing. The outside of the limit switch bearing is fixedly connected to the limit switch bracket. The top of the limit switch bracket is rotatably connected to the limit switch dial. The top of the limit switch dial is fixedly connected to the limit switch dial. The top of the fixing bracket for the actuator and the valve body is fixedly connected to an elastic component for providing elastic force.

[0007] As a further description of the above technical solution:

[0008] The elastic component includes a scroll spring and a protective cover. The bottom of the scroll spring and the protective cover is fixedly connected to the top of the fixing bracket of the actuator and the valve body. The bottom of the scroll spring and the protective cover is slidably connected to the valve body bearing.

[0009] As a further description of the above technical solution:

[0010] The tops of the spiral spring and the protective cover are fixedly connected with a mounting plate, and the interior of the mounting plate is fixedly connected with a handle lever.

[0011] As a further description of the above technical solution:

[0012] The interior of the handle lever is fixedly connected to an actuator bearing, and the top of the actuator bearing is fixedly connected to a limit switch dial bearing.

[0013] As a further description of the above technical solution:

[0014] The top of the mounting plate is fixedly connected with an actuator protection cover, and both sides of the volute spring and the protection cover are fixedly connected with bolts.

[0015] As a further description of the above technical solution:

[0016] The bottom of the fixing bracket of the actuator and the valve body is fixedly connected to the valve body, the interior of the fixing bracket of the actuator and the valve body is fixedly connected to a bearing baffle, and the right side of the bearing baffle is fixedly connected to a valve handle.

[0017] As a further description of the above technical solution:

[0018] The top of the mounting plate is fixedly connected to a fuse fixing rod at one end, the top of the handle lever is fixedly connected to a fuse fixing rod at the other end, and the top of the mounting plate is fixedly connected to two fuses.

[0019] As a further description of the above technical solution:

[0020] One side of the handle lever is fixedly connected to a handle lever baffle, and the other side of the two fuse piece fixing rods is fixedly connected to the left side of the handle lever baffle.

[0021] The utility model has the following beneficial effects:

[0022] In the present invention, the valve body and actuator are fixed by a fixing bracket, and the valve body and actuator are connected by a bearing. The limit switch dial and actuator are fixed by a limit switch bracket, and the limit switch dial and actuator are connected by a bearing. The limit switch dial is equipped with a limit switch that can send a signal when triggered. It can automatically and quickly close or open the valve according to the quantified ambient temperature before or when a dangerous situation occurs. At the same time, it can send a feedback signal and can be manually controlled to open or close the valve again. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional schematic diagram of the pipeline fuse protection device proposed by the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the actuator and the fixing bracket of the valve body of the pipeline fuse protection device proposed by the utility model;

[0025] Figure 3 This is a structural diagram of the fuse fixing rod of the pipeline fuse protection device proposed by the present invention;

[0026] Figure 4 This is a structural schematic diagram of the fuse element of the pipeline fuse protection device proposed by the utility model.

[0027] Legend:

[0028] 1. Fixing bracket for actuator and valve body; 2. Valve body bearing; 3. Bearing baffle; 4. Volute spring and protective cover; 5. Valve handle; 6. Mounting plate; 7. Handle lever; 8. Fuse link; 9. Handle lever baffle; 10. Fuse link fixing rod; 11. Valve body; 12. Actuator bearing; 13. Limit switch bearing; 14. Limit switch; 15. Actuator protective cover; 16. Limit switch bracket; 17. Limit switch dial; 18. Bolts. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figures 1 to 3The present invention provides an embodiment of a pipeline fuse protection device, comprising a bracket 1 for fixing the actuator and valve body, and a limit switch bearing 13 for securing and supporting other components. This ensures valve stability and accuracy during operation. The outer portion of the limit switch bearing 13 is fixedly connected to a limit switch bracket 16. When the pointer reaches a specified position, a switching signal is provided to the receiving device, facilitating real-time remote monitoring of the open or closed status of the fuse valve. The fuse link 8 is used to secure and release the handle lever 7. The handle lever stopper 9 limits the maximum rotational travel of the handle lever 7. The fuse link securing rod 10 is used to secure the fuse link or safety lock. The limit switch 14 rotates within a certain range, triggering or deactivating the alarm signal. The top of the limit switch bracket 16 is rotatably connected to the limit switch 14. The limit switch bearing 13 drives a limit switch dial 17. The rotation of the pointer on the limit switch dial 17 indicates the bearing rotation angle. The direction indicated by the pointer can be used to infer whether the fuse valve is activated and whether it is closed or activated. When the contacts inside it are triggered, an electrical signal can be sent, usually used to indicate the position or status of a valve;

[0031] The top of the limit switch 14 is fixedly connected to a limit switch dial 17, a visual indicator for displaying the status or position of the limit switch 14. An elastic component for providing elastic force is fixedly connected to the top of the fixed bracket 1 between the actuator and the valve body. The elastic component includes a volute spring and a protective cover 4. The bottom of the volute spring and protective cover 4 is fixedly connected to the top of the fixed bracket 1 between the actuator and the valve body. A spring under stress is provided inside the volute spring and protective cover 4, and the outer ring of the spring is clamped on the lower shell of the protective cover. The torque applied to the spring by the rotation of the bearing is just enough to open or close the predetermined valve body 11. The volute spring is installed in a metal protective cover, which is divided into two upper and lower shells. A groove is provided between the two shells, and a sealing ring is provided in the groove to seal the protective cover. The upper and lower shells are fixedly connected by bolts 18. The bottom of the volute spring and protective cover 4 is slidably connected to the valve body bearing 2.

[0032] Reference Figure 1 、 Figure 2 、 Figure 4The top of the spiral spring and the protective cover 4 is fixedly connected with a mounting plate 6, and the inside of the mounting plate 6 is fixedly connected with a handle lever 7. The mounting plate 6 is fixed to the outer ring of the spring and clamped on the upper shell of the protective cover. The gasket runs through the upper bearing and is installed between the mounting plate 6 and the handle lever 7. One end of the fuse fixing rod 10 is fixed on the mounting plate 6, and the other end is fixed on the handle lever 7. The fixing rod on the handle lever 7 and the fixing rod on the mounting plate 6 are usually connected by a safety lock plate. The safety lock plate usually plays a role in protecting the actuator action during the transportation and maintenance of the handle. The inside of the handle lever 7 is fixedly connected with an actuator bearing 12, and the top of the actuator bearing 12 is fixedly connected with a limit switch bearing 13. The top of the mounting plate 6 is fixedly connected with an actuator protective cover 15, and bolts 18 are threaded on both sides of the spiral spring and the protective cover 4. The concentric circle of the lower shell is provided in the middle of the lower shell of the scroll spring protective cover. The concentric circle can accommodate the bearing. The bearing is divided into two independent upper and lower bearings. The upper end bearing passes through the center of the scroll spring. A groove is provided in the bearing. The groove is used to clamp the scroll spring in the scroll spring protective cover. Above the upper end bearing is a square column. The square column passes through the mounting plate 6 and the handle lever 7. The top of the column is provided with an internal thread. The handle lever 7 and the upper bearing are firmly fixed by screws. The bottom of the upper bearing is a concave square column. A shaft sleeve is provided between the upper and lower shells of the scroll spring protective cover and the upper bearing to protect the lower shell.

[0033] The bottom of the fixed bracket 1 of the actuator and the valve body is fixedly connected to the valve body 11, and high-temperature resistant lubricating oil is applied between the spiral spring and the upper bearing in the spiral spring protective cover to play a lubricating and protective role. The outer shape of the lower bearing is a cylinder or a regular hexagon, the upper end of the lower bearing is a square cylinder, and the lower end is a concave circle. The square cylinder at the upper end can just be inserted into the bottom of the upper bearing; the concave circle at the lower end of the lower bearing is located on the handle nut of the valve body 11. The handle nut fixes the valve handle 5 through the valve stem thread. The bearing baffle 3 is fixed to the surface of the lower bearing. The bearing baffle 3 is parallel or perpendicular to the direction of the gas or liquid in and out of the valve body 11, and is tightly attached to the valve handle 5. The spiral spring and protective cover 4 are fixed to the valve body 11 through the actuator and the fixed bracket 1 of the valve body;

[0034] The actuator and the valve body are fixedly connected to the inside of the fixed bracket 1 with a bearing baffle 3, and the right side of the bearing baffle 3 is fixedly connected to the valve handle 5. The vortex spring drives the bearing to rotate, and the bearing baffle 3 fixed on the bearing pushes the valve handle 5 to rotate, causing the valve stem to rotate and close or open the valve 90 degrees. The top of the mounting plate 6 is fixedly connected to one end of the fuse fixing rod 10. The fuse is fixed on the fuse fixing rod 10 when the pipeline fuse protection device is put into operation, and the safety lock plate should be removed at the same time. When the ambient temperature reaches the set temperature of the selected fuse 8, the fuse will naturally melt, and the originally fixed handle lever 7 will be released, causing the vortex spring under pressure to release the pressure, and the stroke of the handle lever 7 converted by the released force is just limited by the handle lever baffle 9. The top of handle lever 7 is fixedly connected to the other end of the fuse-link fixing rod 10. The top of mounting plate 6 is fixedly connected to two fuse links 8. Fuses are generally classified into 57°C, 72°C, 74°C, 93°C, 100°C, 138°C, 141°C, 182°C, 227°C, etc. according to the requirements of different usage environments. A handle lever baffle 9 is fixedly connected to one side of handle lever 7. The other side of the two fuse-link fixing rods 10 is fixedly connected to the left side of the handle lever baffle 9.

[0035] Working Principle: The mounting bracket 1 between the actuator and the valve body provides stable support, ensuring accurate and reliable valve operation. As gas or liquid flows, the handle lever 7 connects to the fusible link 8 via the fuse-link fixing rod 10, forming a complete control circuit. Under normal operating conditions, the handle lever 7 remains connected to the safety lock plate to prevent accidental operation. When the ambient temperature reaches the safety threshold set by the fusible link 8, the fusible link 8 naturally melts, releasing the handle lever 7. At this point, the spiral spring and the spring within the protective cover 4, free from restraint, rapidly release pressure, pushing the handle lever 7 into motion. The movement of the handle lever 7, through the bearing stop 3 fixed to it, drives the valve handle 5 to rotate, achieving a 90-degree closing or opening of the valve. During the movement of the handle lever 7, the limit switch bearing 13 and the limit switch 14 work together to monitor the valve position in real time. When the handle lever 7 reaches the preset maximum rotational travel, the limit switch 14 is triggered, sending an electrical signal indicating the valve status. This signal can be received by remote monitoring equipment, ensuring that the operator can monitor the valve's opening or closing status in real time. Furthermore, the design of the fuse-link fixing rod 10 ensures that after the fuse 8 melts, the movement of the handle lever 7 is limited by the handle lever baffle 9, ensuring the safe closure of the valve. Throughout this process, the spiral spring is kept in good working condition by lubricating oil, reducing friction and extending its service life.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipeline fuse protection device, comprising a fixing bracket (1) for an actuator and a valve body, and a limit switch bearing (13), characterized in that: The outside of the limit switch bearing (13) is fixedly connected to the limit switch bracket (16), the top of the limit switch bracket (16) is rotatably connected to the limit switch (14), the top of the limit switch (14) is fixedly connected to the limit switch dial (17), and the top of the fixed bracket (1) of the actuator and the valve body is fixedly connected to an elastic component for providing elastic force.

2. The pipeline fuse protection device according to claim 1, characterized in that: The elastic component comprises a scroll spring and a protective cover (4), the bottom of the scroll spring and the protective cover (4) being fixedly connected to the top of the fixing bracket (1) of the actuator and the valve body, and the bottom of the scroll spring and the protective cover (4) being slidably connected to the valve body bearing (2).

3. The pipeline fuse protection device according to claim 2, characterized in that: The top of the scroll spring and the protective cover (4) is fixedly connected to a mounting plate (6), and the interior of the mounting plate (6) is fixedly connected to a handle lever (7).

4. The pipeline fuse protection device according to claim 3, characterized in that: An actuator bearing (12) is fixedly connected to the interior of the handle lever (7), and a limit switch bearing (13) is fixedly connected to the top of the actuator bearing (12).

5. The pipeline fuse protection device according to claim 3, characterized in that: The top of the mounting plate (6) is fixedly connected to an actuator protection cover (15), and both sides of the volute spring and the protection cover (4) are fixedly connected to bolts (18).

6. The pipeline fuse protection device according to claim 1, characterized in that: The bottom of the fixing bracket (1) of the actuator and the valve body is fixedly connected to the valve body (11), the interior of the fixing bracket (1) of the actuator and the valve body is fixedly connected to a bearing baffle (3), and the right side of the bearing baffle (3) is fixedly connected to a valve handle (5).

7. The pipeline fuse protection device according to claim 3, characterized in that: The top of the mounting plate (6) is fixedly connected to a fuse link fixing rod (10) at one end, the top of the handle lever (7) is fixedly connected to a fuse link fixing rod (10) at the other end, and the top of the mounting plate (6) is fixedly connected to two fuse links (8).

8. The pipeline fuse protection device according to claim 7, characterized in that: One side of the handle lever (7) is fixedly connected to a handle lever baffle (9), and the other side of the two fuse piece fixing rods (10) is fixedly connected to the left side of the handle lever baffle (9).

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