Shear pin type emergency release valve

Abstract

The utility model discloses a shear pin type emergency release valve, which belongs to the technical field of valves and comprises a valve body and a valve cover component, the valve body is connected with the valve cover component through a shear pin, weak grooves are arranged at two ends of the shear pin, the valve cover component comprises a rotating arm and a sealing cover, the sealing cover is used for sealing the top end of the valve body, and the rotating arm is connected with the sealing cover. The L-shaped limiting plate is arranged on the valve body, the holes are formed in the limiting plate and the rotating arm, the shear pin is arranged on the limiting plate and the rotating arm in a penetrating mode, the two ends of the shear pin are installed through the plugs, the weak point is arranged on the shear pin, and when overpressure occurs in a tank, the weak point of the shear pin is broken through jacking so that the sealing cover can be opened to achieve pressure relief. Therefore, the problem that the traditional assembly process is tedious can be effectively solved, the pressure generated in the tank body can be effectively utilized, the shear pin is jacked open through the pressure, the pressure relief effect is achieved, the use of a balancing weight in the traditional assembly process can be avoided, the use cost can be greatly reduced, and the installation efficiency can be greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a shear pin type emergency relief valve. Background Technology

[0002] Emergency relief valves are a commonly used type of safety valve and are an indispensable safety facility for storage tanks. Emergency relief valves not only maintain the pressure balance of the storage tank and ensure that the storage tank is not damaged when overpressure occurs, but also reduce the evaporation and loss of the medium inside the tank and meet the ventilation requirements of the storage tank during large-scale exhalation. Currently, general emergency relief valves require the addition of a counterweight to the rotating arm and the counterweight is fixed by double-ended studs and gaskets to achieve the opening pressure of the valve cover. However, the existing assembly process is cumbersome and the counterweight needs to be processed additionally. Therefore, a shear pin type emergency relief valve is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a shear pin type emergency relief valve to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a shear pin type emergency relief valve, comprising a valve body and a valve cover assembly, wherein the valve body and the valve cover assembly are connected by a shear pin;

[0005] The shear pin has weak grooves at both ends.

[0006] As a further preferred embodiment of this technical solution: by creating a weak groove in the shear pin, the shear pin is weakened, so that when overpressure occurs inside the tank, the weak groove on the shear pin is broken, causing the sealing cover to open and thus releasing pressure.

[0007] As a further preferred embodiment of this technical solution: the valve cover assembly includes a rotating arm and a sealing cover. The sealing cover is used to seal the top of the valve body. The rotating arm is connected to the top of the sealing cover. The rotating arm is set to drive the sealing cover and the limiting plate through the shearing pin to complete the installation and fixing of the valve cover assembly on the valve body, while the sealing cover is used to block the valve body opening.

[0008] A limiting plate is provided on the outer periphery of the valve body, and a through hole is provided on the limiting plate. A threaded hole is provided on the rotating arm. The shearing pin can pass through the through hole and the threaded hole respectively to connect the valve body and the valve cover assembly. The installation of the shearing pin is completed through the above operation.

[0009] As a further preferred embodiment of this technical solution: on the side opposite to the limiting plate, a mounting plate is fixedly connected to the valve body, and the end of the rotating arm away from the limiting plate is hinged to the mounting plate, with the mounting plate supporting the rotating arm.

[0010] As a further preferred embodiment of this technical solution: the limiting plate is L-shaped, with the first end of the L-shaped limiting plate fixedly connected to the valve body and the second end extending upward. The through hole is opened at the second end of the L-shaped limiting plate. By setting the limiting plate to L-shape, it can be installed on the valve body and used to receive the valve cover assembly.

[0011] As a further preferred embodiment of this technical solution: the rotating arm includes a horizontal arm and a vertical arm, the horizontal arm and the vertical arm are fixedly connected, the vertical arm is hinged to the mounting plate, the horizontal arm is U-shaped with the opening facing downwards, the vertical arm installs the valve cover assembly and the valve body, and the horizontal arm supports the limiting plate.

[0012] As a further preferred embodiment of this technical solution: the weak groove is trapezoidal and the long side of the trapezoid coincides with the long side of the shear pin. The above arrangement facilitates the installation of the shear pin into the limiting plate and the rotating arm.

[0013] As a further preferred embodiment of this technical solution, it also includes a plug, which is threadedly connected to the rotating arm. The plug is used to seal both ends of the shear pin on the rotating arm. After the shear pin is installed in the limiting plate and the rotating arm, it is connected to the threaded hole by the plug to achieve a sealing effect.

[0014] As a further preferred embodiment of this technical solution: the plug is provided with a blind hole, and the end of the shear pin can be inserted into the blind hole so that the blind hole can receive the shear pin.

[0015] As a further preferred embodiment of this technical solution: the through hole is a light hole, and the above-mentioned setting facilitates the insertion of the shear pin.

[0016] As a further preferred embodiment of this technical solution: the diameter of the sealing cap is larger than the outer diameter of the valve body orifice, and the above arrangement is used to completely seal the valve body orifice.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this utility model, an L-shaped limiting plate is set on the valve body, and holes are opened on the limiting plate and the rotating arm (threaded holes are opened on the rotating arm, and open holes are opened on the limiting plate). The shearing pin is passed through the limiting plate and the rotating arm, and plugs are installed at both ends. A weak point is set on the shearing pin. When overpressure occurs in the tank, the weak point of the shearing pin is broken, which causes the sealing cover to open and realize pressure relief. This can effectively solve the problem of cumbersome traditional assembly process, and can respond quickly to pressure relief.

[0019] 2. This utility model effectively utilizes the pressure generated inside the tank to push open the shear pin, thereby achieving the effect of pressure relief. This can avoid the use of counterweights in the traditional assembly process, thus greatly saving on usage costs and installation efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the opening structure of the valve cover of the shear pin type emergency relief valve of this utility model;

[0021] Figure 2 This is a schematic diagram of the valve cover closure structure of the shear pin type emergency relief valve of this utility model;

[0022] Figure 3 This is a top view of the shear pin type emergency relief valve of this utility model.

[0023] Figure 4 This utility model relates to a shear pin type emergency relief valve. Figure 3 Enlarged structural diagram of section A in the middle;

[0024] Figure 5 This is a schematic diagram of the shear pin structure in the shear pin type emergency relief valve of this utility model;

[0025] Figure 6 This is a schematic diagram of the broken shear pin in the shear pin type emergency relief valve of this utility model.

[0026] In the diagram: 1. Valve body; 2. Limiting plate; 21. Through hole; 3. Mounting plate; 4. Rotating arm; 41. Threaded hole; 5. Sealing cover; 6. Shear pin; 61. Weak groove; 7. Seal. Detailed Implementation

[0027] 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.

[0028] Example 1

[0029] Please see Figures 1-6 This utility model provides a technical solution: a shear pin type emergency relief valve, including a valve body 1 and a valve cover assembly, wherein the valve body 1 and the valve cover assembly are connected by a shear pin 6;

[0030] The shear pin 6 has weak grooves 61 at both ends.

[0031] In this embodiment, specifically: by creating a weak groove 61 on the shear pin 6, the shear pin 6 is weakened, so that when overpressure occurs in the tank, the weak groove 61 (i.e. the weak point) on the shear pin 6 is broken, causing the sealing cover 5 to open and release pressure.

[0032] It should be further explained that the size of the specific weak groove 61 (i.e., weak point) can be set according to the opening pressure.

[0033] In this embodiment, specifically: the valve cover assembly includes a rotating arm 4 and a sealing cover 5. The sealing cover 5 is used to seal the top end of the valve body 1. The rotating arm 4 is connected to the top end of the sealing cover 5. The rotating arm 4 is used to drive the sealing cover 5 on one hand, and on the other hand, the valve cover assembly is installed and fixed on the valve body 1 by the shear pin 6 and the limiting plate 2. The sealing cover 5 is used to block the opening of the valve body 1.

[0034] A limiting plate 2 is provided on the outer periphery of the valve body 1. A through hole 21 is provided on the limiting plate 2. A threaded hole 41 is provided on the rotating arm 4. The shearing pin 6 can pass through the through hole 21 and the threaded hole 41 respectively to connect the valve body 1 and the valve cover assembly. The installation of the shearing pin 6 is completed through the above operation.

[0035] In this embodiment, specifically: on the side opposite to the limiting plate 2, the valve body 1 is fixedly connected to the mounting plate 3, and the end of the rotating arm 4 away from the limiting plate 2 is hinged to the mounting plate 3, and the rotating arm 4 is supported by the mounting plate 3.

[0036] In this embodiment, specifically: the limiting plate 2 is L-shaped, the first end of the L-shaped limiting plate 2 is fixedly connected to the valve body 1, the second end extends upward, and the through hole 21 is opened at the second end of the L-shaped limiting plate 2. By setting the limiting plate 2 to L-shape, it is installed on the valve body 1 on the one hand, and used to support the valve cover assembly on the other hand.

[0037] In this embodiment, specifically: the rotating arm 4 includes a horizontal arm and a vertical arm, which are fixedly connected. The vertical arm is hinged to the mounting plate 3. The horizontal arm is U-shaped with the opening facing downwards. The valve cover assembly is installed to the valve body 1 through the vertical arm, while the limiting plate 2 is supported by the horizontal arm.

[0038] Example 2

[0039] The shear pin type emergency relief valve has a trapezoidal weak groove 61 with the long side of the trapezoid coinciding with the long side of the shear pin 6. This design facilitates the installation of the shear pin 6 into the limit plate 2 and the rotating arm 4.

[0040] In this embodiment, specifically: it also includes a plug 7, which is threadedly connected to the rotating arm 4. The plug 7 is used to seal both ends of the shear pin 6 on the rotating arm 4. After the shear pin 6 is installed in the limiting plate 2 and the rotating arm 4, it is threadedly connected to the threaded hole 41 by the plug 7 to achieve a sealing effect.

[0041] In this embodiment, specifically: the plug 7 is provided with a blind hole, and the end of the shear pin 6 can be inserted into the blind hole, so that the blind hole can receive the shear pin 6.

[0042] In this embodiment, specifically: the through hole 21 is a light hole, which facilitates the insertion of the shearing pin 6.

[0043] In this embodiment, specifically: the diameter of the sealing cap 5 is larger than the outer diameter of the valve port of the valve body 1, and the above-mentioned arrangement is used to completely seal the valve port of the valve body 1.

[0044] Working principle: During installation, the valve cover assembly is first installed onto the valve body 1 port. Then, the shear pin 6 is inserted through the through hole 21 and threaded hole 41 respectively opened on the limit plate 2 and the rotating arm 4. After that, the two sealing plugs 7 are threaded into the threaded hole 41 of the rotating arm 4. When overpressure occurs in the tank, the weak groove 61 opened on the shear pin 6 (i.e., for weakening the shear pin 6) is pressure-broken through the weak groove 61 (i.e., weak point) on the shear pin 6, so that the sealing cover 5 opens and the pressure is released.

[0045] 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 shear pin type emergency relief valve, characterized in that: It includes a valve body (1) and a valve cover assembly, which are connected by a shear pin (6); The shear pin (6) has weak grooves (61) at both ends.

2. The shear pin type emergency relief valve according to claim 1, characterized in that: The valve cover assembly includes a rotating arm (4) and a sealing cover (5), the sealing cover (5) being used to seal the top end of the valve body (1), and the rotating arm (4) being connected to the top end of the sealing cover (5). The valve body (1) is provided with a limiting plate (2) on its outer periphery. The limiting plate (2) has a through hole (21) and the rotating arm (4) has a corresponding threaded hole (41). The shearing pin (6) can pass through the through hole (21) and the threaded hole (41) to connect the valve body (1) and the valve cover assembly.

3. The shear pin type emergency relief valve according to claim 2, characterized in that: On the side opposite to the limiting plate (2), a mounting plate (3) is fixedly connected to the valve body (1), and the end of the rotating arm (4) away from the limiting plate (2) is hinged to the mounting plate (3).

4. The shear pin type emergency relief valve according to claim 2, characterized in that: The limiting plate (2) is L-shaped. The first end of the L-shaped limiting plate (2) is fixedly connected to the valve body (1), and the second end extends upward. The through hole (21) is opened at the second end of the L-shaped limiting plate (2).

5. The shear pin type emergency relief valve according to claim 3, characterized in that: The rotating arm (4) includes a horizontal arm and a vertical arm, which are fixedly connected. The vertical arm is hinged to the mounting plate (3), and the horizontal arm is U-shaped with its opening facing downwards.

6. The shear pin type emergency relief valve according to claim 1, characterized in that: The weak groove (61) is trapezoidal and the long side of the trapezoid coincides with the long side of the shear pin (6).

7. The shear pin type emergency relief valve according to claim 2, characterized in that: It also includes a plug (7), which is threadedly connected to the rotating arm (4) and is used to seal both ends of the shear pin (6) on the rotating arm (4).

8. The shear pin type emergency relief valve according to claim 7, characterized in that: The plug (7) is provided with a blind hole, and the end of the shear pin (6) can be inserted into the blind hole.

9. The shear pin type emergency relief valve according to claim 4, characterized in that: The through hole (21) is a light hole.

10. The shear pin type emergency relief valve according to claim 2, characterized in that: The diameter of the sealing cap (5) is greater than the outer diameter of the valve port of the valve body (1).

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