Safety relief valve

Abstract

The embodiment of the invention relates to a safety relief valve. A valve body is arranged below the safety relief valve; a valve cover is fixedly connected above the valve body; a valve rod is arranged on the safety relief valve; a valve clack structure is arranged on the valve body; sealing structures are arranged on the upper valve clack and the lower valve clack, the sealing structures seal the upper valve clack, the valve body and the valve deck and the lower valve clack and the valve body, the safety pressure relief device has the advantages of being high in precision, convenient to adjust and high in response speed, and the problems that in the prior art, a safety pressure relief device is simple in form and has many defects are solved. The volume is large, the adjustment is inconvenient, and the response speed is slow.

Description

Technical Field

[0001] Embodiments of the present invention relate to a pressure relief valve, and more particularly to a safety pressure relief valve. Background Technology

[0002] In many sectors of industrial production, such as petrochemicals, power generation, pharmaceuticals, and heating and water supply systems, fluid transport and control are crucial. During operation, these systems often experience pressure fluctuations due to various internal and external factors. Abnormal increases in system pressure can pose serious safety hazards. Excessive pressure may cause pipelines, containers, and other equipment to be subjected to stresses exceeding their design capacity, leading to equipment rupture, leaks, or even catastrophic accidents such as explosions. This not only results in enormous economic losses but may also endanger human lives.

[0003] In the existing technology, the safety pressure relief device is relatively simple in form but has many defects, such as being bulky, inconvenient to adjust, and slow in response. Summary of the Invention

[0004] The purpose of this invention is to provide a safety relief valve that is highly accurate, easy to adjust, and has a fast response speed.

[0005] To achieve the above objectives, embodiments of the present invention provide a safety pressure relief valve, comprising:

[0006] The valve body is disposed below the safety relief valve;

[0007] A valve cover is fixedly connected to the valve body above the valve body;

[0008] A valve stem is provided on the safety relief valve;

[0009] Valve disc structure, wherein the valve disc structure is provided on the valve body;

[0010] A sealing structure is provided on the upper valve disc and the lower valve disc, and the sealing structure seals the space between the upper valve disc, the valve body and the valve cover, and the space between the lower valve disc and the valve body.

[0011] Furthermore, in the safety relief valve of the present invention, the sealing structure includes:

[0012] A plurality of sealing rings are provided between the lower valve disc and the valve body;

[0013] A diaphragm is disposed above the upper valve disc;

[0014] A diaphragm pressure plate is disposed above the diaphragm.

[0015] Furthermore, in the safety relief valve of the present invention, the valve disc structure includes:

[0016] Lower valve disc, wherein the lower valve disc is provided on the valve body;

[0017] An upper valve disc is disposed above the lower valve disc.

[0018] Furthermore, in the safety relief valve of the present invention, a spring is provided around the valve stem, the spring being above the diaphragm pressure plate.

[0019] Furthermore, in the safety relief valve of the present invention, both the upper valve disc and the lower valve disc are T-shaped, and the upper valve disc and the lower valve disc are combined to form an I-shape.

[0020] Furthermore, in the safety relief valve of the present invention, the channel is provided on the valve body; an inlet is provided in the channel; and an outlet is provided in the channel.

[0021] Furthermore, in the safety pressure relief valve of the present invention, the inlet is connected to the needle valve through a pipe, the needle valve is connected to the small ball valve through a through hole, the small ball valve is connected to the pilot valve through a pipe, the pilot valve is connected to the small ball valve through a pipe, and the small ball valve is connected to the outlet through a pipe.

[0022] Furthermore, in the safety relief valve of the present invention, a first nut is provided below the lower valve disc and a second nut is provided above the diaphragm pressure plate, the first nut and the second nut respectively fixing the lower valve disc and the upper valve disc.

[0023] Furthermore, in the safety relief valve of the present invention, a third nut is provided above the valve stem, and the third nut is fixedly connected to the valve stem and the valve cover.

[0024] Furthermore, in the safety relief valve of the present invention, the lower part of the valve stem is gap-connected to the valve body.

[0025] Compared with the prior art, the embodiments of the present invention employ a valve body positioned below the safety relief valve; a valve cover fixedly connected above the valve body; a valve stem positioned on the safety relief valve; a valve disc structure positioned on the valve body; and sealing structures positioned on the upper and lower valve discs, with the sealing structures sealing the upper valve disc, the valve body and the valve cover, and the lower valve disc and the valve body. The advantages of this invention are high precision, convenient adjustment, and fast response speed. It solves the technical problems of existing safety relief devices, which are relatively simple in form, have many defects, are bulky, inconvenient to adjust, and have slow response speed. Attached Figure Description

[0026] Figure 1 This is the front view of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the various embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this invention to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0028] Embodiments of the present invention relate to a safety pressure relief valve, such as... Figure 1 As shown, it includes:

[0029] In this embodiment, a valve body 1 is provided below the safety relief valve, and the valve body 1 serves as the main body of this embodiment.

[0030] A valve cover 9 is fixedly connected above the valve body 1, and the valve cover 9 is a component of this embodiment;

[0031] A valve stem 2 is installed on the safety relief valve. When the safety relief valve needs to be opened to relieve pressure, the external force is transmitted to the valve disc structure 18 through the valve stem 2, so that the valve disc structure 18 accurately and quickly leaves the valve body 1, opens the pressure relief channel, and allows the high-pressure fluid in the system to be discharged. When the system pressure returns to the safe range, the valve stem 2 can transmit the force of the spring 8 to the valve disc structure 18, so that it is pressed tightly against the valve body 1, closes the pressure relief channel, and ensures the normal sealed operation of the system.

[0032] A valve disc structure 18 is installed on the valve body 1. The valve disc structure 18 prevents leakage under normal operating conditions, achieving effective sealing. When the system is operating normally and the pressure is within a safe range, the valve disc structure 18 presses tightly against the valve body 1, forming a seal that prevents fluid from leaking out through the safety relief valve, ensuring normal fluid transport and pressure maintenance. When the system pressure exceeds a set value, the fluid pressure acting on the valve disc structure 18 overcomes the preload of the spring 8, causing the valve disc structure 18 to move upwards and away from the valve body 1, thereby opening the pressure relief channel and discharging the high-pressure fluid from the system, gradually reducing the pressure. When the pressure drops to a safe range, the preload of the spring 8 pushes the valve disc structure 18 downwards, pressing it tightly against the valve body 1 again, closing the pressure relief channel, stopping the pressure relief, and restoring the system to a normal sealing state. The opening of the valve disc structure 18 allows the high-pressure fluid in the system to be quickly discharged, reducing the system pressure and preventing damage to the system from excessive pressure.

[0033] A sealing structure 22 is provided on the upper valve disc 5 and the lower valve disc 4. The sealing structure 22 seals the space between the upper valve disc 5, valve body 1, and valve cover 9, and between the lower valve disc 4 and valve body 1, ensuring a tight seal between the upper valve disc 5 and valve body 1 and valve cover 9. When the safety relief valve is closed, the fluid pressure in the system acts on the valve disc structure 18, and the sealing structure 22 prevents fluid leakage and avoids pressure leakage. The seal between the lower valve disc 4 and valve body 1 prevents fluid leakage at the contact surface between the lower valve disc 4 and valve body 1, ensuring the valve's sealing performance during normal operation.

[0034] In this embodiment, a sealing structure 22 is provided on the upper valve disc 5 and the lower valve disc 4. The sealing structure 22 seals the space between the upper valve disc 5, the valve body 1, and the valve cover 9, and between the lower valve disc 4 and the valve body 1. The sealing structure 22 ensures a tight seal between the upper valve disc 5 and the valve body 1 and the valve cover 9. When the safety relief valve is in the closed state, the fluid pressure in the system acts on the valve disc structure 18, and the sealing structure 22 can prevent fluid leakage and avoid pressure leakage. The seal between the lower valve disc 4 and the valve body 1 can prevent fluid leakage at the contact surface between the lower valve disc 4 and the valve body 1, ensuring the sealing performance of the valve during normal operation. Its advantages are high precision, convenient adjustment, and fast response speed. It solves the technical problems of existing safety relief devices, which are relatively simple in form, have many defects, are bulky, inconvenient to adjust, and have slow response speed.

[0035] To achieve the above-mentioned technical effects, such as Figure 1 As shown, the sealing structure 22 includes:

[0036] Several sealing rings 3 are provided between the lower valve disc 4 and the valve body 1. The sealing rings 3 can effectively prevent the fluid in the system from leaking from the gap between the lower valve disc 4 and the valve body 1, ensuring the sealing performance of the valve and maintaining the stability of the system pressure.

[0037] A diaphragm 7 is installed above the upper valve disc 5. The diaphragm 7 can convert the pressure change in the system into its own deformation. When the system pressure changes, the diaphragm 7 will expand or contract accordingly. This deformation can be transmitted to the spring 8 through the diaphragm pressure plate 6, so that the spring 8 can react in a timely and accurate manner according to the deformation of the diaphragm 7, thereby realizing the opening or closing of the safety relief valve.

[0038] A diaphragm pressure plate 6 is installed above the diaphragm 7. The diaphragm pressure plate 6 can prevent the diaphragm 7 from shifting during operation. When the diaphragm 7 deforms due to pressure changes, the diaphragm pressure plate 6 can evenly transmit the deformation force of the diaphragm to the spring 8, so that the spring 8 can react in a timely and accurate manner according to the deformation of the diaphragm 7, thereby realizing the opening or closing of the safety relief valve.

[0039] To achieve the above-mentioned technical effects, such as Figure 1 As shown, the valve disc structure 18 includes:

[0040] A lower valve disc 4 is installed on the valve body 1. The lower valve disc 4 fits tightly with the valve body 1 to form a seal when the system pressure is normal, preventing the medium in the system from leaking through the safety relief valve and maintaining the normal operating pressure of the system. When the system pressure begins to rise, the lower valve disc 4 will be subjected to the pressure of the medium. When the pressure reaches a certain level, the lower valve disc 4 will be displaced.

[0041] An upper valve disc 5 is installed above the lower valve disc 4. The cooperation between the lower valve disc 4 and the upper valve disc 5 enables staged pressure relief. When the system pressure just begins to rise, the lower valve disc 4 will respond first, playing an initial buffering role; as the pressure continues to rise, the upper valve disc 5 opens to relieve pressure at a larger flow rate. The combined action of the lower valve disc 4 and the upper valve disc 5 enhances the sealing reliability of the safety relief valve and reduces the possibility of media leakage.

[0042] To achieve the above-mentioned technical effects, such as Figure 1 As shown, a spring 8 is installed around the valve stem 2, above the diaphragm plate 6. When the spring 8 is compressed, it applies a downward elastic force to the diaphragm plate 6. This elastic force is transmitted to the upper valve disc 5 through the diaphragm plate 6 and the diaphragm 7, causing the upper valve disc 5 and the lower valve disc 4 to press tightly against the valve body 1, forming a seal. When the system pressure reaches the set pressure of the safety relief valve, the force exerted by the medium pressure on the upper valve disc 5 exceeds the elastic force of the spring 8. The upper valve disc 5 will move upward under the action of the medium pressure, opening the pressure relief channel, allowing the medium in the system to be discharged, and reducing the system pressure.

[0043] To achieve the above-mentioned technical effects, such as Figure 1 As shown, both the upper valve disc 5 and the lower valve disc 4 are T-shaped. The upper valve disc 5 and the lower valve disc 4 are combined to form an I-shape. The T-shaped structure gives the upper valve disc 5 and the lower valve disc 4 good compressive strength in the vertical direction, while the combined I-shaped structure can provide more stable support in both the horizontal and vertical directions, reducing the deformation and displacement of the upper valve disc 5 and the lower valve disc 4 during operation. This allows the upper valve disc 5 and the lower valve disc 4 to work together better, enhances the stability of the structure, and improves the service life of the upper valve disc 5 and the lower valve disc 4.

[0044] To achieve the above-mentioned technical effects, such as Figure 1 As shown, a channel 12 is provided on the valve body 1; an inlet 10 is provided in the channel 12; and an outlet 11 is provided in the channel 12.

[0045] To achieve the above-mentioned technical effects, such as Figure 1As shown, the inlet 10 is connected to the needle valve 13 through the pipe 17. The needle valve 13 is connected to the first small ball valve 14 through the through hole 16. The first small ball valve 14 is connected to the pilot valve 15 through the pipe 17. The pilot valve 15 is connected to the second small ball valve 23 through the pipe 17. The second small ball valve 23 is connected to the outlet 10 through the pipe 17.

[0046] To achieve the above-mentioned technical effects, such as Figure 1 As shown, a first nut 19 is provided below the lower valve disc 4, and a second nut 20 is provided above the diaphragm pressure plate 6. The first nut 19 and the second nut 20 fix the lower valve disc 4 and the upper valve disc 5, respectively.

[0047] To achieve the above-mentioned technical effects, such as Figure 1 As shown, a third nut 21 is provided above the valve stem 2, and the third nut 21 is fixedly connected to the valve stem 2 and the valve cover 9.

[0048] To achieve the above-mentioned technical effects, such as Figure 1 As shown, the lower part of the valve stem 2 is connected to the valve body 1 with a gap. The valve stem 2 drives the upper valve disc 5 and the lower valve disc 4 to move up and down. The gap connection provides a relatively precise movement track for the valve stem 2, enabling it to move up and down and ensuring that the upper valve disc 5 and the lower valve disc 4 can seal and separate from the valve body 1, thereby controlling the flow and cut-off of the medium.

[0049] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the present invention.

Claims

1. A safety pressure relief valve, characterized in that, include: The valve body is disposed below the safety relief valve; A valve cover is fixedly connected to the valve body above the valve body; A valve stem is provided on the safety relief valve; Valve disc structure, wherein the valve disc structure is provided on the valve body; A sealing structure is provided on the upper valve disc and the lower valve disc, and the sealing structure seals the space between the upper valve disc, the valve body and the valve cover, and the space between the lower valve disc and the valve body.

2. The safety relief valve according to claim 1, characterized in that, The sealing structure includes: A plurality of sealing rings are provided between the lower valve disc and the valve body; A diaphragm is disposed above the upper valve disc; A diaphragm pressure plate is disposed above the diaphragm.

3. The safety relief valve according to claim 1, characterized in that, The valve disc structure includes: Lower valve disc, wherein the lower valve disc is provided on the valve body; An upper valve disc is disposed above the lower valve disc.

4. The safety relief valve according to claim 1, characterized in that, A spring is provided around the valve stem, the spring being above the diaphragm pressure plate.

5. The safety relief valve according to claim 3, characterized in that, Both the upper valve flap and the lower valve flap are T-shaped, and the upper valve flap and the lower valve flap are combined to form an I-shape.

6. The safety relief valve according to claim 1, characterized in that, The valve body is provided with the channel; the channel is provided with an inlet; and the channel is provided with an outlet.

7. The safety relief valve according to claim 6, characterized in that, The inlet is connected to a needle valve via a pipe. The needle valve passes through a through hole and is connected to a first small ball valve. The first small ball valve is connected to a pilot valve via a pipe. The pilot valve is connected to a second small ball valve via a pipe. The second small ball valve is connected to the outlet via a pipe.

8. The safety relief valve according to claim 3, characterized in that, A first nut is provided below the lower valve disc, and a second nut is provided above the diaphragm pressure plate. The first nut and the second nut respectively fix the lower valve disc and the upper valve disc.

9. The safety relief valve according to claim 1, characterized in that, A third nut is provided above the valve stem, and the third nut is used to fix the valve stem and the valve cover together.

10. The safety relief valve according to claim 1, characterized in that, The lower part of the valve stem is connected to the valve body with a gap.

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