Safety valve capable of quickly releasing pressure

Abstract

The utility model relates to the technical field of safety valves, in particular to a safety valve capable of quickly relieving pressure, which comprises an upper valve body and a lower valve body which are connected to form a cavity, a quick pressure relief device is arranged on the inner surface of the cavity, the quick pressure relief device comprises a mounting plate and a sealing plate, and four annularly and uniformly distributed sliding rods are fixedly mounted on the lower surface of the mounting plate. The inner surface of the sealing plate is provided with four pressure relief channels which are annularly and uniformly distributed and are coaxial with the sliding rod, the inner surface of each pressure relief channel is provided with four plugging blocks, the inner surface of each plugging block is provided with a through hole, and the outer surface of the sliding rod at the joint of each plugging block and the mounting plate is sleeved with a second pressed spring; the safety valve has the beneficial effects that the pressure relief speed in the valve body can be increased by utilizing the pressure relief channels at multiple positions, and the total pressure relief area is obviously increased by simultaneously opening the multiple pressure relief channels, so that the safety valve can discharge more media in a short time, the pressure of a pipeline is quickly reduced, and the condition that the pipeline is exploded is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of safety valve, concretely is a safety valve of quick pressure relief. BACKGROUND

[0002] Safety valve is also called pressure relief valve, is with spring, weight or other ways to keep closed state, and when pressure exceeds the given value, automatic opening valve, belongs to automatic valve class, safety valve plays the safe effect of protecting equipment, control pressure does not exceed the stipulated value, and plays an important protective role to personal safety and equipment operation, and it is mainly widely used in steam boiler, oil production well, pressure pipeline and pressure vessel etc.

[0003] The existing safety valve usually compresses the spring through the impact of high-pressure fluid on the valve clack inside to open a little gap for pressure relief.

[0004] However, when starting pressure relief, the gap starts to increase with the increase of pressure, if the pressure in the pipeline rises rapidly, the safety valve cannot perform quick pressure relief due to the limited size of the pressure relief port, which may cause the pipeline to burst. TECHNICAL CONTENT

[0005] The utility model aims at providing a safety valve that can quickly relieve pressure to solve the problem that when starting pressure relief, the gap starts to increase with the increase of pressure, if the pressure in the pipeline rises rapidly, the safety valve cannot perform quick pressure relief due to the limited size of the pressure relief port, which may cause the pipeline to burst.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a safety valve that can quickly relieve pressure, comprising: an upper valve body and a lower valve body, the upper valve body and the lower valve body are connected to form a chamber, the inner surface of the chamber is provided with a quick pressure relief device, the quick pressure relief device comprises: a mounting plate and a sealing plate, the lower surface of the mounting plate is fixedly provided with four sliding rods evenly distributed in a ring;

[0007] The inner surface of the sealing plate is provided with four pressure relief channels evenly distributed in a ring and coaxially arranged with the sliding rods, the inner surface of each pressure relief channel is provided with four blocking blocks, the inner surface of each blocking block is provided with a through hole, and the outer surface of the sliding rod at the connection between the blocking block and the mounting plate is respectively sleeved with a second pressure spring.

[0008] Preferably, the blocking block is elastically connected to the sliding rod through the through hole and the second pressure spring to slide back and forth, and the blocking block is slidingly connected with the pressure relief channel.

[0009] Preferably, the outer surface of the bottom end of the sealing plate is sleeved with a rubber sealing ring, and the sealing plate is sealingly connected with the lower valve body through the rubber sealing ring.

[0010] Preferably, the upper surface of the upper valve body is fixedly provided with a protective sleeve, an inner thread is arranged on the inner surface of the protective sleeve, and the protective sleeve is threadedly connected with an adjusting screw rod through the inner thread.

[0011] Preferably, the bottom end of the adjusting screw rod is fixedly connected with a valve rod, the bottom end of the valve rod is fixedly connected with the sealing plate through the mounting plate, a first compression spring is arranged on the outer surface of the valve rod, and the bottom end of the first compression spring is elastically connected with the mounting plate away from the adjusting screw rod.

[0012] Preferably, the bottom end of the sliding rod is fixedly provided with four ring-shaped limiting plates which are uniformly distributed and coaxial with the pressure relief channels, and the side wall of the upper valve body is fixedly provided with a connecting valve.

[0013] Compared with the prior art, the safety valve can quickly release pressure.

[0014] The safety valve can quickly release pressure.

[0015] When the sealing plate is impacted by high-pressure fluid to release pressure, not only can the sealing plate release pressure through the opened gap, but also the blocking block in the pressure relief channel of the sealing plate slides on the sliding rod through the through hole when the blocking block is impacted by the high-pressure fluid, and then the second compression spring arranged on the sliding rod is compressed upward, so that the pressure relief channel is connected, and the pressure relief speed in the valve body can be accelerated by using multiple pressure relief channels, and the total pressure relief area is significantly increased, so that the safety valve can discharge more medium in a short time, rapidly reduce the pipeline pressure, and avoid the explosion of the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model;

[0017] Figure 2 It is a whole structure sectional view of the utility model;

[0018] Figure 3 It is a chamber internal structure schematic view of the utility model;

[0019] Figure 4 It is a quick pressure relief device structure schematic view of the utility model;

[0020] Figure 5 It is a sealing plate structure schematic view of the utility model.

[0021] In the drawing: 1, upper valve body; 2, lower valve body; 3, chamber; 4, connecting valve; 5, protective sleeve; 6, adjusting screw rod; 7, valve rod; 8, first compression spring; 9, mounting plate; 10, sealing plate; 11, pressure relief channel; 12, rubber sealing ring; 13, blocking block; 14, through hole; 15, sliding rod; 16, second compression spring; 17, limiting plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] Please refer to Figures 1 to 5 The utility model provides a kind of technical solutions: a safety valve that can quickly relieve pressure;

[0024] Embodiment one:

[0025] In order to realize the relief speed of sealing plate 10 when being impacted by high-pressure fluid to relieve pressure, the upper valve body 1 is connected with the lower valve body 2 to form a chamber 3, the inner surface of the chamber 3 is provided with a quick pressure relief device, the quick pressure relief device includes: mounting plate 9 and sealing plate 10, the lower surface of the mounting plate 9 is fixedly installed with four sliding rods 15 evenly distributed in a ring, the inner surface of the sealing plate 10 is provided with four pressure relief channels 11 evenly distributed in a ring and coaxially arranged with the sliding rods 15, the inner surface of the pressure relief channel 11 is respectively provided with four blocking blocks 13, the inner surface of the blocking block 13 is provided with a through hole 14, the outer surface of the sliding rod 15 at the connection between the blocking block 13 and the mounting plate 9 is respectively sleeved with a second pressure spring 16, not only can relieve pressure through a point gap, but also the blocking block 13 in the pressure relief channel 11 inside the sealing plate 10 slides on the sliding rod 15 through the through hole 14 when being impacted by high-pressure fluid, and then compresses the second pressure spring 16 sleeved on the sliding rod 15 upwards, so as to make the pressure relief channel 11 communicate, so as to accelerate the relief speed inside the valve body by using multiple positions of the pressure relief channel 11, and the multiple pressure relief channels 11 are opened at the same time, which significantly increases the total area of pressure relief, so that the safety valve can discharge more medium in a short time, rapidly reduce the pipeline pressure, and avoid the situation that the pipeline explodes.

[0026] Embodiment two:

[0027] On the basis of embodiment one, in order to avoid the sealing effect of the rapid pressure relief device inside the chamber 3 when the pressure relief standard is not reached, the sealing ring 12 is sleeved on the outer surface of the bottom end of the sealing plate 10, the sealing plate 10 is sealingly connected with the lower valve body 2 through the sealing ring 12, the sealing block 13 is slidingly connected with the pressure relief channel 11, and the sealing block 13 is elastically connected with the sliding rod 15 through the through hole 14 and the second pressure spring 16. When the pressure of the second pressure spring 16 from the fluid does not reach the pressure relief standard, the sealing block 13 is stationary inside the pressure relief channel 11, thereby ensuring the sealing property, and when the pressure inside the chamber 3 reaches the standard value, the sealing block 13 is retracted into the pressure relief channel 11 for sealing through the rebound of the second pressure spring 16.

[0028] Working principle: in actual use, in order to achieve the pressure relief speed of the sealing plate 10 when it is impacted by high-pressure fluid for pressure relief, not only can the pressure relief be performed through the opening of a point gap, but also the sealing block 13 inside the pressure relief channel 11 in the sealing plate 10 slides on the sliding rod 15 through the through hole 14 when it is impacted by high-pressure fluid, thereby compressing the second pressure spring 16 sleeved on the sliding rod 15 upwards, promoting the communication of the pressure relief channel 11, so that the pressure relief speed inside the valve body can be accelerated by using multiple positions of the pressure relief channel 11, and the total pressure relief area is significantly increased, so that the safety valve can discharge more medium in a short time, rapidly reduce the pipeline pressure, and avoid the explosion of the pipeline. In order to avoid the sealing effect of the rapid pressure relief device inside the chamber 3 when the pressure relief standard is not reached, when the pressure of the second pressure spring 16 from the fluid does not reach the pressure relief standard, the sealing block 13 is stationary inside the pressure relief channel 11, thereby ensuring the sealing property, and when the pressure inside the chamber 3 reaches the standard value, the sealing block 13 is retracted into the pressure relief channel 11 for sealing through the rebound of the second pressure spring 16.

[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A quick pressure relief safety valve characterized by: Include: Upper valve body (1) and lower valve body (2), upper valve body (1) and lower valve body (2) are connected to form a chamber (3), the inner surface of the chamber (3) is provided with a quick pressure relief device, the quick pressure relief device includes: mounting plate (9) and sealing plate (10), the lower surface of the mounting plate (9) is fixedly installed with four evenly distributed slide rods (15); The inner surface of the sealing plate (10) is provided with four evenly distributed pressure relief channels (11) coaxially arranged with the slide rods (15), the inner surface of the pressure relief channel (11) is provided with four sealing blocks (13), the inner surface of the sealing block (13) is provided with a through hole (14), the outer surface of the slide rod (15) at the connection between the sealing block (13) and the mounting plate (9) is respectively sleeved with a second compression spring (16).

2. A relief valve according to claim 1, wherein: The sealing block (13) is elastically connected with the second compression spring (16) through the through hole (14) and slides back and forth on the slide rod (15), the sealing block (13) is slidably connected with the pressure relief channel (11).

3. A relief valve according to claim 1, wherein: The bottom outer surface of the sealing plate (10) is sleeved with a rubber sealing ring (12), and the sealing plate (10) is sealingly connected with the lower valve body (2) through the rubber sealing ring (12).

4. A relief valve according to claim 1, wherein: The upper surface of the upper valve body (1) is fixedly installed with a protective sleeve (5), the inner surface of the protective sleeve (5) is provided with an internal thread, and the protective sleeve (5) is threadedly connected with an adjusting screw (6) through the internal thread.

5. A relief valve according to claim 4, wherein: The bottom end of the adjusting screw (6) is fixedly connected with a valve rod (7), the bottom end of the valve rod (7) penetrates the mounting plate (9) and is fixedly connected with the sealing plate (10), the outer surface of the valve rod (7) is sleeved with a first compression spring (8), and the bottom end of the first compression spring (8) away from the adjusting screw (6) is elastically connected with the mounting plate (9).

6. A relief valve according to claim 1, wherein: The bottom end of the slide rod (15) is fixedly installed with four evenly distributed limiting plates (17) coaxially arranged with the pressure relief channel (11), and the sidewall of the upper valve body (1) is fixedly installed with a connecting valve (4).

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