Device for preventing pressure building leakage

Abstract

The utility model relates to the technical field of valves, in particular to a device for preventing pressure building leakage. The device comprises a pressure relief channel (2) arranged on one side of a ball valve body (1); the pressure relief channel (2) is arranged on one side of the ball body (1) and is communicated with a channel in the ball body (1); and when the ball valve is closed, the pressure relief channel (2) is communicated with the flow channel (11) of the ball valve. The device has the advantages that the structure is simple; safety and effectiveness; and pressure building is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a device of preventing pressure leakage. BACKGROUND

[0002] Ball valve usually is with the ball body with circular channel as the opening and closing element, and the ball body realizes opening and closing action along with the rotation of valve rod, and the opening and closing element of ball valve is a ball body with through hole, rotates around the axis perpendicular to the channel, thereby achieves the purpose of opening and closing channel. Ball valve only needs to use the operation of 90 degrees rotation and small rotation torque to close tightly, achieves simple operation and can effectively cut off the material in the pipeline.

[0003] In practical application, the volatile material is involved, and a certain material will be stored in the valve cavity when the ball valve is closed, because the pipeline is closed tightly after the ball valve is closed, so when the temperature changes, the material in the valve cavity of the ball valve will vaporize, thereby causing the pressure in the valve cavity to rise, and further causing the ball valve flange to be prone to leakage, which has safety risk. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a kind of devices of preventing pressure leakage, which are to overcome the defects of the above prior art, with simple structure, safe and effective, effectively prevent the device of preventing pressure leakage.

[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0006] A kind of device of preventing pressure leakage, the device includes: pressure relief passage 2 being arranged in the one side of ball valve ball body 1;

[0007] The pressure relief passage 2 is arranged in the one side of ball body 1 and communicated with the channel in ball body 1;

[0008] Pressure relief passage 2 is communicated with the flow channel 11 of ball valve when ball valve is closed.

[0009] Further, the pressure relief passage 2 is arc-shaped port 10 at the spherical surface of ball body 1.

[0010] Further, the pressure relief passage 2 further includes outer pressure relief passage 3, pressure relief valve 4, spring 5, inner pressure relief passage 6, partition 7 and pressure relief hole 8;

[0011] Inner pressure relief passage 6 is arranged in the inner side of ball body 1 and communicated with the channel in ball body 1;

[0012] Outer pressure relief passage 3 is arranged in the outer side of ball body 1, and inner pressure relief passage 6 and outer pressure relief passage 3 are cut off by partition 7, and pressure relief hole 8 is arranged on partition 7;

[0013] The pressure relief hole 8 is provided with a pressure relief valve 4 matched with the pressure relief hole 8; the other end of the pressure relief valve 4 is connected to the inner wall of the inner pressure relief channel 6 through a spring 5.

[0014] Further, the spring 5 is arranged in a spring seat 9.

[0015] The spring seat 9 is arranged on the inner wall of the inner pressure relief channel 6.

[0016] Further, the radial section of the inner pressure relief channel 6 and the outer pressure relief channel 3 are both in the shape of "L"; and are separated by a "L"-shaped partition plate 7.

[0017] Further, a sealing ring is arranged in the pressure relief hole 8.

[0018] Further, the cross section of the pressure relief valve 4 is in the shape of a trapezoid or "T".

[0019] Further, the device is arranged at any side of the ball valve ball 1.

[0020] Further, the elastic force of the spring 5 is smaller than the pressure when the flange material leaks in the ball valve.

[0021] Further, the outer pressure relief channel 3 is provided with an arc-shaped opening 10 at the spherical surface of the ball 1.

[0022] The device for preventing pressure leakage provided by the utility model increases a pressure relief device in the ball valve ball, and the working principle of the pressure relief device is that when the pressure in the valve cavity increases in the closed state of the ball, the pressure relief valve is lifted after the pressure relief hole lifts the pressure relief valve, the pressure in the valve cavity is discharged through the pressure relief hole, and when the pressure in the valve cavity decreases, the spring resets, and the pressure relief valve falls to the original position to form a sealed ball structure with the ball.

[0023] The device for preventing pressure leakage provided by the utility model is provided with an arc-shaped opening at the opening of the pressure relief channel and the spherical surface of the ball valve ball, so that the wear of the valve seat and the sealing device caused by the pressure relief channel opening can be effectively prevented.

[0024] Compared with the prior art, the device for preventing pressure leakage provided by the utility model has the following advantages:

[0025] (1) Simple structure.

[0026] (2) Safe and effective.

[0027] (3) Effectively preventing pressure. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic view of the device for preventing pressure leakage provided by the utility model in the open state of the ball valve.

[0029] Figure 2 is a structure schematic view of the ball valve closing state of the device for preventing pressure leakage provided by the utility model.

[0030] Figure 3 is Figure 2 is a structure enlarged schematic view of the A place in the pressure relief valve closing state.

[0031] Figure 4 is a structure schematic view of the ball valve opening state of the device for preventing pressure leakage provided by the utility model embodiment 2.

[0032] Figure 5 is Figure 4 is a structure enlarged schematic view of the A place in the pressure relief valve opening state.

[0033] Figure 6 is Figure 4 is a structure enlarged schematic view of the A place in the pressure relief valve opening state.

[0034] In the figure: 1 is a ball, 2 is a pressure relief channel, 3 is an outer pressure relief channel, 4 is a pressure relief valve, 5 is a spring, 6 is an inner pressure relief channel, 7 is a partition, 8 is a pressure relief hole, 9 is a spring seat, 10 is an arc-shaped port, 11 is a flow channel. DETAILED DESCRIPTION

[0035] In order to make the technical personnel in the field better understand the technical scheme of the utility model, the following embodiments are further described in detail, and the following embodiments are only used for illustrating the utility model, but not used for limiting the scope of the utility model.

[0036] A device for preventing pressure leakage, the device comprises: a pressure relief channel 2 arranged on one side of a ball valve ball 1;

[0037] The pressure relief channel 2 is arranged on one side of the ball 1 and communicated with the channel in the ball 1;

[0038] When the ball valve is closed, the pressure relief channel 2 is communicated with the flow channel 11 of the ball valve.

[0039] Further, the pressure relief channel 2 is an arc-shaped port 10 at the spherical surface of the ball 1.

[0040] Further, the pressure relief channel 2 further comprises an outer pressure relief channel 3, a pressure relief valve 4, a spring 5, an inner pressure relief channel 6, a partition 7 and a pressure relief hole 8;

[0041] The inner pressure relief channel 6 is arranged on the inner side of the ball 1 and communicated with the channel in the ball 1;

[0042] The outer pressure relief channel 3 is arranged on the outer side of the ball 1, the inner pressure relief channel 6 and the outer pressure relief channel 3 are cut off by the partition 7, and the pressure relief hole 8 is arranged on the partition 7;

[0043] The pressure relief hole 8 is opposite to the pressure relief valve 4; the other end of the pressure relief valve 4 is connected to the inner wall of the inner pressure relief channel 6 by the spring 5.

[0044] Further, the spring 5 is arranged in the spring seat 9.

[0045] The spring seat 9 is arranged on the inner wall of the inner pressure relief channel 6.

[0046] Further, the radial section of the inner pressure relief channel 6 and the outer pressure relief channel 3 are both "L" shaped; and are separated by the "L" shaped partition 7.

[0047] Further, the pressure relief hole 8 is provided with a sealing ring.

[0048] Further, the cross section of the pressure relief valve 4 is trapezoidal or "T" shaped.

[0049] Further, the device is arranged at any side of the ball valve ball 1.

[0050] Further, the elastic force of the spring 5 is smaller than the pressure when the flange material leaks in the ball valve.

[0051] Further, the outer pressure relief channel 3 is arc-shaped at the spherical surface of the ball 1.

[0052] Embodiment 1

[0053] A device for preventing pressure leakage, the device comprising: a pressure relief channel 2 arranged at one side of a ball valve ball 1; the pressure relief channel 2 is arranged at one side of the ball 1 and communicates with the channel in the ball 1; the pressure relief channel 2 communicates with the flow channel 11 of the ball valve when the ball valve is closed.

[0054] The pressure relief channel 2 is arc-shaped at the spherical surface of the ball 1.

[0055] Embodiment 2

[0056] A device for preventing pressure leakage, the device comprising: a pressure relief channel 2 arranged at one side of a ball valve ball 1; the pressure relief channel 2 further comprising an outer pressure relief channel 3, a pressure relief valve 4, a spring 5, an inner pressure relief channel 6, a partition 7 and a pressure relief hole 8; the inner pressure relief channel 6 is arranged inside the ball 1 and communicates with the channel in the ball 1; the outer pressure relief channel 3 is arranged outside the ball 1, the inner pressure relief channel 6 and the outer pressure relief channel 3 are separated by the partition 7, the partition 7 is provided with the pressure relief hole 8; the pressure relief hole 8 is opposite to the pressure relief valve 4; the other end of the pressure relief valve 4 is connected to the inner wall of the inner pressure relief channel 6 by the spring 5.

[0057] The spring 5 is arranged in the spring seat 9, and the spring seat 9 is arranged on the inner wall of the inner pressure relief channel 6. The radial section of the inner pressure relief channel 6 and the outer pressure relief channel 3 is in the shape of L, and the two are separated by the L-shaped partition plate 7. The pressure relief hole 8 is provided with a sealing ring. The cross section of the pressure relief valve 4 is in the shape of T. The device is arranged on the side of the discharge end of the ball valve. The elastic force of the spring 5 is smaller than the pressure when the flange material leaks in the ball valve. The outer pressure relief channel 3 is provided with an arc-shaped opening 10 at the spherical surface of the ball 1.

[0058] Embodiment 3

[0059] A device for preventing pressure leakage, which comprises a pressure relief channel 2 arranged on one side of a ball 1 of a ball valve, wherein the pressure relief channel 2 further comprises an outer pressure relief channel 3, a pressure relief valve 4, a spring 5, an inner pressure relief channel 6, a partition plate 7 and a pressure relief hole 8; the inner pressure relief channel 6 is arranged on the inner side of the ball 1 and communicates with the channel in the ball 1; the outer pressure relief channel 3 is arranged on the outer side of the ball 1, the inner pressure relief channel 6 and the outer pressure relief channel 3 are separated by the partition plate 7, the partition plate 7 is provided with the pressure relief hole 8; the pressure relief hole 8 is provided with the pressure relief valve 4 matched therewith in a relative position; the other end of the pressure relief valve 4 is connected to the inner wall of the inner pressure relief channel 6 through the spring 5.

[0060] The spring 5 is arranged in the spring seat 9, and the spring seat 9 is arranged on the inner wall of the inner pressure relief channel 6. The radial section of the inner pressure relief channel 6 and the outer pressure relief channel 3 is in the shape of L, and the two are separated by the L-shaped partition plate 7. The pressure relief hole 8 is provided with a sealing ring. The cross section of the pressure relief valve 4 is in the shape of T. The device is arranged on the side of the discharge end of the ball valve. The elastic force of the spring 5 is smaller than the pressure when the flange material leaks in the ball valve. The outer pressure relief channel 3 is provided with an arc-shaped opening 10 at the spherical surface of the ball 1.

[0061] The above describes the preferred embodiments of the present application, but the present application is not limited to the specific details of the above embodiments, and various modifications can be made to the technical scheme of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application.

[0062] In addition, it should be noted that the various specific technical features and steps described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combinations.

[0063] In addition, the various different embodiments of the present application can also be combined in any appropriate manner, as long as they do not deviate from the technical concept of the present application, and they should also be considered as disclosed by the present application.

Claims

1. A device for preventing trapped pressure leaks, comprising: The device comprises a pressure relief channel (2) arranged on one side of the ball valve ball (1); The pressure relief channel (2) is arranged on one side of the ball (1) and communicates with the channel in the ball (1); The pressure relief channel (2) communicates with the flow channel (11) of the ball valve when the ball valve is closed.

2. A device for preventing pressure build-up leakage according to claim 1, wherein: The pressure relief channel (2) is arc-shaped at the spherical surface of the ball (1).

3. A device for preventing leakage of trapped pressure according to any one of claims 1 or 2, characterised in that: The pressure relief channel further comprises an outer pressure relief channel (3), a pressure relief valve (4), a spring (5), an inner pressure relief channel (6), a partition plate (7) and a pressure relief hole (8); The inner pressure relief channel (6) is arranged on the inner side of the ball (1) and communicates with the channel in the ball (1); The outer pressure relief channel (3) is arranged on the outer side of the ball (1), the inner pressure relief channel (6) and the outer pressure relief channel (3) are separated by the partition plate (7), and the partition plate (7) is provided with a pressure relief hole (8); The pressure relief hole (8) is arranged in a position matched with the pressure relief valve (4); the other end of the pressure relief valve (4) is connected to the inner wall of the inner pressure relief channel (6) through the spring (5).

4. A device for preventing pressure build-up leakage according to claim 3, wherein: The spring (5) is arranged in the spring seat (9); The spring seat (9) is arranged on the inner wall of the inner pressure relief channel (6).

5. A device for preventing pressure build-up leakage as claimed in claim 3 wherein: The radial cross section of the inner pressure relief channel (6) and the outer pressure relief channel (3) is "L" shaped; and the "L" shaped partition plate (7) separates them.

6. A device for preventing pressure build-up leakage as claimed in claim 3 wherein: The pressure relief hole (8) is provided with a sealing ring.

7. A device for preventing pressure build-up leakage as claimed in claim 3 wherein: The cross section of the pressure relief valve (4) is trapezoidal or "T" shaped.

8. A device for preventing pressure build-up leakage as claimed in claim 3 wherein: The device is arranged on any side of the ball valve ball (1).

9. A device for preventing pressure build-up leakage according to claim 3, wherein: The spring force of the spring (5) is smaller than the pressure when the flange material leaks in the ball valve.

10. A device for preventing pressure build-up leakage as claimed in claim 3 wherein: The outer pressure relief channel (3) is arc-shaped at the spherical surface of the ball (1).

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