CN112664686A - Safety device and method for presetting gate valve during boiler effect generation - Google Patents
Safety device and method for presetting gate valve during boiler effect generation Download PDFInfo
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- CN112664686A CN112664686A CN202011625132.5A CN202011625132A CN112664686A CN 112664686 A CN112664686 A CN 112664686A CN 202011625132 A CN202011625132 A CN 202011625132A CN 112664686 A CN112664686 A CN 112664686A
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- boiler
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Abstract
The invention belongs to the technical field of valve manufacturing, and particularly relates to a safety device and a method for presetting a gate valve when a boiler has effect, wherein the device comprises a discharge pipe, a body, a spring, a locking nut, a sealing gasket and an end cover nut; the discharge pipe is connected with the locking nut, the spring is arranged between the locking nut and the body, the spring is compressed to enable the discharge pipe to be attached and sealed with the body, the sealing gasket is arranged on the end face of the body, and the body is connected with and fastened with the end cover nut. The invention eliminates boiler effect which often occurs in a steam pipeline gate valve, eliminates boiler effect under the condition of ensuring that the system does not stop running, and ensures normal running of the system.
Description
Technical Field
The invention belongs to the technical field of valve manufacturing, and particularly relates to a safety device and a method for presetting a gate valve when boiler effect occurs.
Background
The defect that the valve cannot be opened or the valve rod is broken due to the effect of the boiler effect frequently occurs in the operation process of the gate valve of the steam system of the power plant, and the function of the gate valve is seriously influenced by the boiler effect. To eliminate this drawback, the system is shut down, and the gate valve is opened slightly in advance to eliminate the upper chamber pressure, or a hole is made in the side gate plate to eliminate the upper chamber pressure. These measures all can cause very big economic benefits loss, and the flashboard is punched and also can reduce the intensity of flashboard, influences the life-span of gate valve.
Therefore, it is desirable to provide a safety device and method for presetting a gate valve for boiler effect, so as to eliminate boiler effect in time when boiler effect occurs in the gate valve, and ensure smooth opening of the gate valve
Disclosure of Invention
The invention aims to provide a safety device and a method for presetting a gate valve when a boiler effect occurs, which can eliminate the boiler effect frequently occurring in a steam pipeline gate valve, eliminate the boiler effect under the condition of ensuring that a system is not stopped and ensure the normal operation of the system.
The technical scheme for realizing the purpose of the invention is as follows:
a safety device for a gate valve during boiler effect generation is preset, and the device comprises a discharge pipe, a body, a spring, a locking nut, a sealing gasket and an end cover nut;
the discharge pipe is connected with the locking nut, the spring is arranged between the locking nut and the body, the spring is compressed to enable the discharge pipe to be attached and sealed with the body, the sealing gasket is arranged on the end face of the body, and the body is connected with and fastened with the end cover nut.
The discharge pipe is provided with a discharge hole.
The discharge pipe is connected with the locking nut through threads.
The body and the forced opening nut are connected through threads.
The lower part of the forced opening nut is attached to the locking nut.
The sealing gasket is placed on the upper end face of the body.
The body is connected and fastened with the end cover nut, and the sealing gasket is compressed to realize sealing.
The discharge pipe is attached to the body in a sealing manner to form a sealing surface.
The method for presetting the safety device for the boiler effect of the gate valve comprises the following steps:
step 1, when the boiler effect occurs to the gate valve, taking down an end cover nut and a sealing gasket, using an inner hexagonal wrench to rotate a forced opening nut downwards to separate a discharge pipe from a body, discharging high-pressure steam on an upper cavity of the gate valve upwards through a discharge hole, and discharging the high-pressure steam out of the valve body through the discharge hole on the forced opening nut to eliminate high pressure of the cavity of the gate valve so as to open the gate valve;
and 2, after the effect of the gate valve boiler is eliminated and when the effect needs to be recovered, the internal hexagonal wrench is used for upwards rotating the forced opening nut, the sealing surface of the discharge pipe is in contact and compression with the sealing surface of the body under the action of the spring, sealing is realized, a sealing gasket is installed, and the end cover nut is fastened, so that double sealing is realized.
The invention has the beneficial technical effects that:
(1) according to the principle and the position of boiler effect generation, a special connecting pipe is designed on the upper cavity shell of the gate valve, and can provide a discharge function;
(2) the boiler effect can be recovered again after being eliminated, and the safe and reliable operation of the valve is ensured;
(3) the device simple structure, convenient operation can solve the problem of handling that the boiler effect takes place for the gate valve in service, does not need the boiler effect that the shut down system can handle the gate valve.
Drawings
FIG. 1 is a schematic structural view of a safety device for a gate valve for boiler effect initialization according to the present invention;
in the figure: 1-a discharge pipe; 2-sealing surface; 3-body; 4-a spring; 5-locking the nut; 6-a forced open nut; 7-a sealing gasket; 8-end cap nut; 9-bleed hole.
Detailed Description
In order to make those skilled in the art better understand the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention. It should be apparent that the embodiments described below are only some, but not all, of the embodiments of the present invention. All other embodiments that can be derived by a person skilled in the art from the embodiments described herein without inventive step are within the scope of the present invention.
As shown in figure 1, the safety device for presetting the effect of the gate valve on the boiler comprises a discharge pipe 1, a sealing surface 2, a body 3, a spring 4, a locking nut 5, a strong opening nut 6, a sealing gasket 7, an end cover nut 8 and a discharge hole 9.
The discharge pipe 1 is connected with the locking nut 5 through threads;
the compression spring 4 makes the discharge pipe 1 and the body 3 fit to realize sealing through the elasticity of the spring 4.
The discharge pipe 1 is jointed with the body 3 in a sealing way to form a sealing surface 2.
The forced opening nut 6 is connected with the body 3 through threads;
the lower part of the forced opening nut 6 is attached to the locking nut 5.
The sealing gasket 7 is arranged on the end surface of the body 3;
the end cover nut 8 is connected and fastened with the body 3 by the thread;
the end cap nut 8 compresses the sealing gasket 7 to realize sealing.
The safety device for the effect generation of the boiler on the gate valve and the use method thereof, provided by the invention, replace the original upper cavity hydrostatic test connecting pipe when the gate valve is processed, and the body 3 is welded and connected with the upper cavity of the valve to complete the installation of the device.
The invention also provides a use method of the safety device preset for the gate valve during boiler effect, which comprises the following steps:
step 1, when the boiler effect occurs to the gate valve, an end cover nut 8 and a sealing gasket 7 are taken down, a hexagon socket wrench is used for downwards rotating a strong opening nut 6, a sealing surface of a discharge pipe 1 is separated from a sealing surface 2 of a body 3, high-pressure steam on an upper cavity of the gate valve is upwards discharged through a discharge hole 9, the high-pressure steam is discharged out of the valve body through the discharge hole on the strong opening nut 6, and the high pressure of the cavity of the gate valve is eliminated, so that the gate valve can be opened;
and 2, after the effect of the gate valve boiler is eliminated and when the effect needs to be recovered, the internal hexagonal wrench is used for upwards rotating the forced opening nut 6, the sealing surface of the discharge pipe 1 is in contact and pressing with the sealing surface of the body 3 under the action of the spring 4, sealing is realized, the sealing gasket 7 is installed, and the end cover nut 8 is fastened, so that double sealing is realized.
The invention eliminates boiler effect which often occurs in a steam pipeline gate valve, eliminates boiler effect under the condition of ensuring that the system does not stop running, and ensures normal running of the system.
According to the principle and the position of boiler effect generation, a special connecting pipe is designed on the upper cavity shell of the gate valve, so that the discharging function can be provided;
the invention can be recovered again after the boiler effect is eliminated, and the safe and reliable operation of the valve is ensured;
the device has simple structure and convenient operation, can solve the problem of boiler effect treatment of the gate valve in operation, and can treat the boiler effect of the gate valve without stopping the operation system.
The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (9)
1. The utility model provides a preset safety device that is used for when gate valve emergence boiler effect which characterized in that: the device comprises a discharge pipe (1), a body (3), a spring (4), a locking nut (5), a sealing gasket (7) and an end cover nut (8);
wherein, let out pipe (1) and lock nut (5) and be connected, spring (4) are put between lock nut (5) and body (3), and compression spring (4) make and let out pipe (1) and body (3) laminating sealed, and seal gasket (7) are placed in the terminal surface of body (3), and body (3) are connected and are fastened with end cover nut (8).
2. The safety device for the pre-set of a gate valve for boiler applications of claim 1, wherein: the discharge pipe (1) is provided with a discharge hole (9).
3. The safety device for the pre-set of a gate valve for boiler applications of claim 2, wherein: the discharge pipe (1) is connected with the locking nut (5) through threads.
4. A safety device for pre-setting a gate valve for boiler applications according to claim 3, wherein: the body (3) is connected with the forced opening nut (6) through threads.
5. The safety device of claim 4, wherein the safety device is adapted to be used in the event of a boiler effect on a gate valve, and further comprises: the lower part of the forced opening nut (6) is attached to the locking nut (5).
6. The safety device of claim 5, wherein the safety device is adapted to be used in the event of a boiler effect on a gate valve, and further comprises: the sealing gasket (7) is placed on the upper end face of the body (3).
7. The safety device of claim 6, wherein the safety device is adapted to be used in the event of a boiler effect on a gate valve, and further comprises: the body (3) is connected and fastened with an end cover nut (8), and a sealing gasket (7) is compressed to realize sealing.
8. The safety device of claim 7, wherein the safety device is adapted to be used in the event of a boiler effect on a gate valve, and further comprises: the discharge pipe (1) is attached to the body (3) in a sealing manner to form a sealing surface (2).
9. The method of claim 8, wherein the safety device is preset for the boiler in response to the gate valve, and the method further comprises: the method comprises the following steps:
step 1, when the boiler effect occurs to the gate valve, taking down an end cover nut (8) and a sealing gasket (7), using an inner hexagonal wrench to downwards rotate a forcible opening nut (6), separating a discharge pipe (1) from a body (3), upwards discharging high-pressure steam on an upper cavity of the gate valve through a discharge hole (9), and discharging the high-pressure steam out of the valve body through the discharge hole on the forcible opening nut (6) to eliminate high pressure of the cavity of the gate valve so as to open the gate valve;
and 2, after the effect of the gate valve boiler is eliminated and when the effect needs to be recovered, the internal hexagonal wrench is used for upwards rotating the forced opening nut (6), the sealing surface of the discharge pipe (1) is in contact with the sealing surface of the body (3) and is compressed tightly under the action of the spring (4), sealing is realized, and a sealing gasket (7) and a fastening end cap nut (8) are installed to realize double sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011625132.5A CN112664686A (en) | 2020-12-31 | 2020-12-31 | Safety device and method for presetting gate valve during boiler effect generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011625132.5A CN112664686A (en) | 2020-12-31 | 2020-12-31 | Safety device and method for presetting gate valve during boiler effect generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112664686A true CN112664686A (en) | 2021-04-16 |
Family
ID=75412573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011625132.5A Pending CN112664686A (en) | 2020-12-31 | 2020-12-31 | Safety device and method for presetting gate valve during boiler effect generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112664686A (en) |
-
2020
- 2020-12-31 CN CN202011625132.5A patent/CN112664686A/en active Pending
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