Breaking pin type emergency shut-off valve

Abstract

The utility model discloses a breaking pin type emergency shut-off valve, which belongs to the technical field of valves and comprises a main valve, a shell is fixedly connected onto the main valve, a connecting plate is mounted in the shell, a pin shaft penetrates through the connecting plate, a valve plate is hinged to the connecting plate through the pin shaft, a breaking pin is mounted on the valve plate, and the breaking pin is connected with the main valve. The shell is provided with a cover plate, the cover plate is provided with a cylinder body, a through hole is formed in the cover plate and located in the cylinder body, the weak groove is used for weakening the fracture pin, in the overpressure state, the fracture pin is fractured through the weak groove, the valve plate seals the main valve through free falling, and therefore the fracture pin can be prevented from being fractured, and the service life of the main valve is prolonged. Therefore, the main valve can be timely and effectively closed, the problem that a traditional valve is slow in response is effectively solved, the structure is simple, a large amount of time does not need to be spent on checking all parts during maintenance, and the problem that the traditional valve is complex to maintain is solved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a fracture pin type emergency shut-off valve. Background Technology

[0002] Shut-off valves are safety devices used to cut off fluid flow in emergencies. They open and close by receiving instrument signals and are a type of fluid control valve. Their main functions include pipeline opening and closing, flow direction control, and medium parameter adjustment. Their core function is to quickly cut off dangerous sources under abnormal operating conditions to ensure the safety of personnel and equipment.

[0003] However, existing shut-off valves still have certain drawbacks. Current shut-off valves are slow to respond, and after receiving a shut-off signal, there is often a significant delay in the process from activation to complete closure, missing the optimal shut-off time. In addition, their complex mechanical structure and numerous parts increase the probability of failure, resulting in poor reliability. At the same time, due to their complex structure, maintenance requires professional technicians to spend a lot of time inspecting, cleaning, and replacing various parts, resulting in complicated maintenance. Therefore, a fracture pin type emergency shut-off valve is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a broken pin type emergency shut-off valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fracture pin type emergency shut-off valve, including a main valve, a housing fixedly connected to the main valve, a connecting plate installed inside the housing, a pin penetrating inside the connecting plate, a valve plate hinged to the connecting plate via the pin, a fracture pin installed on the valve plate, a cover plate installed on the housing, a cylinder installed on the cover plate, and a through hole opened on the cover plate and inside the cylinder.

[0006] As a further preferred embodiment of this technical solution: the cover plate and the inlet pipe are supported by the shell, while the broken pin is supported by the valve plate, and the piston plate is supported by the cylinder.

[0007] Among them, the through holes are used to support broken pins.

[0008] As a further preferred embodiment of this technical solution: the fracture pin passes through the through hole, a weak groove is provided in the middle of the fracture pin, and a piston plate is installed on the fracture pin and above the weak groove. The piston plate is located inside the cylinder. The above arrangement ensures the stable operation of the entire device when overpressure occurs, and at the same time, the weak groove is used to weaken the fracture pin.

[0009] As a further preferred embodiment of this technical solution: the valve plate is L-shaped, and the vertical section of the valve plate is in contact with the cover plate.

[0010] As a further preferred embodiment of this technical solution: a tank body and a ferrule are respectively installed on both sides of the main valve. The ferrule is located inside the housing, and the sealing ring installed therein is assembled onto the main valve through the ferrule.

[0011] The sleeve contains a sealing ring, which works in conjunction with the valve plate to ensure a sealing effect under overpressure conditions.

[0012] As a further preferred embodiment of this technical solution: one side of the main valve is inclined, and the ferrule is installed on the inclined side of the main valve. The above arrangement sets one side of the main valve in an inclined state, so that the valve plate fits the main valve better.

[0013] The valve plate area is larger than the ferrule area, and the above arrangement ensures the sealing effect under overpressure conditions.

[0014] As a further preferred embodiment of this technical solution: two support rods are symmetrically installed on the cover plate and inside the cylinder. Both support rods are located below the piston plate, and the piston plate is supported and its position inside the cylinder is defined by the support rods.

[0015] As a further preferred embodiment of this technical solution: an inlet pipe is fixedly connected to one side of the shell, and a pipe body is connected to the inlet pipe. The end of the pipe body away from the inlet pipe is connected to the cylinder body. The medium is introduced through the inlet pipe and then introduced into the cylinder body through the pipe body.

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

[0017] 1. In this utility model, the weak groove is used to weaken the broken pin. When the pressure is over, the broken pin breaks through the weak groove (i.e. the weak point). The valve plate seals the main valve through free fall, so as to close the main valve in a timely and effective manner. This effectively solves the problem of slow response, obvious delay and missed best closing time of traditional valves.

[0018] 2. The structure of this utility model is simple. It only requires a broken pin installed on the raft plate to achieve the effect of quick valve closing. Therefore, when performing maintenance, there is no need to spend a lot of time inspecting, cleaning, and replacing various parts. This solves the problem of complicated maintenance of traditional valves. At the same time, the simple structure effectively reduces the failure rate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a fracture pin type emergency shut-off valve under normal pressure conditions according to this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of a fracture pin type emergency shut-off valve under overpressure shut-off state according to the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the fracture pin in the fracture pin type emergency shut-off valve of this utility model.

[0022] In the diagram: 1. Tank body; 2. Main valve; 3. Shell; 4. Inlet pipe; 5. Cover plate; 51. Support rod; 52. Through hole; 6. Cylinder; 7. Pipe body; 8. Connecting plate; 81. Pin; 82. Valve plate; 83. Broken pin; 84. Piston plate; 9. Flanged sleeve; 91. Sealing ring. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Example 1

[0025] Please see Figures 1-3 This utility model provides a technical solution: a fracture pin type emergency shut-off valve, including a main valve 2, a housing 3 welded to the main valve 2, a connecting plate 8 installed inside the housing 3, a pin 81 passing through the connecting plate 8, a valve plate 82 hinged to the connecting plate 8 via the pin 81, a fracture pin 83 installed on the valve plate 82, a cover plate 5 installed on the housing 3, a cylinder 6 installed on the cover plate 5, and a through hole 52 opened on the cover plate 5 and inside the cylinder 6.

[0026] In this embodiment, specifically: the housing 3 is used to support the cover plate 5 and the inlet pipe 4, while the valve plate 82 is used to support the broken pin 83, and the cylinder 6 is used to support the piston plate 84.

[0027] Among them, the broken pin 83 is received through the through hole 52.

[0028] In this embodiment, specifically: the fracture pin 83 passes through the through hole 52, a weak groove is provided in the middle of the fracture pin 83, and a piston plate 84 is installed on the fracture pin 83 and above the weak groove. The piston plate 84 is located inside the cylinder 6. The above arrangement ensures the stable operation of the device as a whole when overpressure occurs. At the same time, the weak groove is used to weaken the fracture pin 83. So when overpressure occurs, the fracture pin 83 breaks through the weak groove (i.e., the weak point), and the valve plate 82 seals the main valve 2 by free fall.

[0029] It should be further explained that the size of the specific weak groove (i.e., weak point) can be set according to the opening pressure.

[0030] In this embodiment, specifically: the valve plate 82 is L-shaped, and the vertical section of the valve plate 82 is attached to the cover plate 5.

[0031] In this embodiment, specifically: two support rods 51 are symmetrically installed on the cover plate 5 and inside the cylinder 6. Both support rods 51 are located below the piston plate 84. The support rods 51 are used to support and receive the piston plate 84 on the one hand, and to limit the position of the piston plate 84 inside the cylinder 6 on the other hand, to prevent the piston plate 84 from blocking the pipe 7, thereby preventing the medium from entering the cylinder 6.

[0032] Example 2

[0033] A fracture pin type emergency shut-off valve has a tank body 1 and a ferrule 9 installed on both sides of the main valve 2. The ferrule 9 is located inside the housing 3. The ferrule 9 facilitates the assembly of the sealing ring 91 installed therein to the main valve 2.

[0034] The sleeve 9 is equipped with a sealing ring 91. The sealing ring 91 works in conjunction with the valve plate 82 to ensure a sealing effect under overpressure conditions.

[0035] In this embodiment, specifically: one side of the main valve 2 is inclined, and the ferrule 9 is installed on the inclined side of the main valve 2. By setting one side of the main valve 2 in an inclined state, the valve plate 82 fits the main valve 2 better.

[0036] Among them, the area of ​​valve plate 82 is larger than that of ferrule 9, and the above-mentioned setting ensures the sealing effect under overpressure conditions.

[0037] In this embodiment, specifically: an inlet pipe 4 is welded to one side of the shell 3, and a pipe body 7 is connected to the inlet pipe 4. The end of the pipe body 7 away from the inlet pipe 4 is connected to the cylinder 6. The inlet pipe 4 facilitates the introduction of the medium, while the pipe body 7 is used to introduce the medium into the cylinder 6.

[0038] Working principle: Under normal working conditions, the main valve 2 is in the open state, and the medium smoothly enters the tank 1 and the cylinder 6 through the inlet pipe 4 and the pipe body 7 respectively. At this time, the strength of the fracture pin 83 is sufficient to resist the forces under normal working conditions, so the valve plate 82 is in a horizontal state under the restriction of the fracture pin 83.

[0039] Under overpressure conditions, i.e. when the pressure increases, the force on the fracture pin 83 exceeds its preset fracture load. In this case, the fracture pin 83 breaks rapidly, and the valve plate 82, which is not restrained by the fracture pin 83, fits tightly against the main valve 2 under the action of the medium and its own gravity. At this time, the main valve 2 is in the closed state, cutting off the flow of the medium.

[0040] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A break-pin type emergency shut-off valve, comprising a main valve (2), characterized in that: A housing (3) is fixedly connected to the main valve (2). A connecting plate (8) is installed inside the housing (3). A pin (81) passes through the connecting plate (8). A valve plate (82) is hinged to the connecting plate (8) through the pin (81). A break pin (83) is installed on the valve plate (82). A cover plate (5) is installed on the housing (3). A cylinder (6) is installed on the cover plate (5). A through hole (52) is opened on the cover plate (5) and inside the cylinder (6).

2. The emergency shut-off valve of the fracture pin type according to claim 1, characterized in that: The fracture pin (83) passes through the through hole (52), and a weak groove is provided in the middle of the fracture pin (83). A piston plate (84) is installed on the fracture pin (83) and above the weak groove. The piston plate (84) is located inside the cylinder (6).

3. The emergency shut-off valve of the fracture pin type according to claim 1, characterized in that: The valve plate (82) is L-shaped, and the vertical section of the valve plate (82) is attached to the cover plate (5).

4. The emergency shut-off valve of the fracture pin type according to claim 1, characterized in that: The main valve (2) is equipped with a tank (1) and a ferrule (9) on both sides, and the ferrule (9) is located inside the housing (3); The sleeve (9) is equipped with a sealing ring (91).

5. The emergency shut-off valve of the fracture pin type according to claim 4, characterized in that: The main valve (2) is inclined on one side, and the ferrule (9) is installed on the inclined side of the main valve (2); The area of ​​the valve plate (82) is larger than the area of ​​the sleeve (9).

6. The emergency shut-off valve of the fracture pin type according to claim 1, characterized in that: Two support rods (51) are symmetrically installed on the cover plate (5) and inside the cylinder (6), and both support rods (51) are located below the piston plate (84).

7. The emergency shut-off valve of the fracture pin type according to claim 1, characterized in that: An inlet pipe (4) is fixedly connected to one side of the shell (3), and a pipe body (7) is connected to the inlet pipe (4). The end of the pipe body (7) away from the inlet pipe (4) is connected to the cylinder (6).

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