CN216045522U

CN216045522U - Stroke compensation type soot blower regulating valve

Info

Publication number: CN216045522U
Application number: CN202122630819.4U
Authority: CN
Inventors: 李新全; 吴凯伟; 刘波; 刘松松
Original assignee: Zhejiang Environmental Control Automation Instrument Co ltd
Current assignee: Zhejiang Environmental Control Automation Instrument Co ltd
Priority date: 2021-10-30
Filing date: 2021-10-30
Publication date: 2022-03-15
Anticipated expiration: 2031-10-30

Abstract

The utility model discloses a stroke compensation type soot blower regulating valve which comprises a valve body, wherein the interior of the valve body moves downwards through a valve clack arranged on the valve body so as to cut off the medium flow in the valve body; the valve clack is connected with a valve rod, and an elastic piece is arranged at the connection part of the valve rod and the valve clack; the elastic piece is used for providing power compensation for the movement of the valve clack; the valve body is characterized in that a valve seat is further arranged inside the valve body, and the valve seat is matched with the valve clack to improve the sealing performance of the valve body. Based on this, the valve is closing the in-process, and the valve clack moves in place, promptly, the sealed face of valve clack and the sealed face of disk seat contact completely, and rethread elastic component carries out the stroke compensation, reaches effectual sealed, has avoided executor stroke to target in place the valve clack not to position and has caused the leakage, and the sealed face that further causes damages, has consequently not only improved valve life through above-mentioned mode, makes the valve have thrust little when the operation moreover, adjusts in a flexible way, closes the good characteristics of back leakproofness.

Description

Stroke compensation type soot blower regulating valve

Technical Field

The utility model relates to the technical field of valves, in particular to a stroke compensation type soot blower regulating valve.

Background

The valve is suitable for a boiler soot blowing system, and the delivered primary high-temperature high-pressure steam is quickly pressure-regulated and then is delivered into a soot blower, so that the parameters of the valve and the outlet of the soot blower meet the requirements of a production process.

Because the valve belongs to an adjusting type valve, the valve is limited by the signal position of an actuating mechanism, the adjusting valve is not generally used for cutting off, a certain amount of leakage is allowed, and valve internals mostly adopt a valve rod and valve clack mechanical fixed structure so as to reduce the existence of dead zones and return differences in the valve adjusting process and enable the valve to be adjusted flexibly and timely in the operation process. However, due to the limitation of the valve structure and the limit signal, the valve is difficult to be completely sealed in a fully closed state and has a certain leakage amount, so in a system with low requirements on general occasions and process parameters, a switch valve for cutting off is required to be arranged in front of the valve so as to be used when the valve is required to be completely cut off, but the valve becomes a great problem in a soot blowing system with high requirements.

The realization of the process parameters: in practical application, a valve is usually required to be opened instantly to work, the required pressure value is achieved instantly after the valve is opened, and the valve is required to be closed instantly after soot blowing circulation is completed. However, when the valve is used as a regulating valve, the action command is controlled by a signal of 4-20mA, and when the valve is actuated to 4mA (off position), if the action command and the valve position are not highly consistent, leakage can be generated, and the sealing surface of the valve can be damaged by high-pressure difference medium flow, so that the valve is scrapped and fails.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a stroke compensation type soot blower regulating valve to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a stroke compensation type soot blower regulating valve comprises a valve body, a valve body and a control valve, wherein the valve body moves downwards through a valve clack arranged on the valve body so as to cut off media passing through the interior of the valve body; the valve clack is connected with a valve rod, and an elastic piece is arranged at the connection part of the valve rod and the valve clack; providing power compensation for the movement of the valve flap by using the elastic piece; and a valve seat is arranged in the valve body, and the sealing surface of the valve seat is matched with the sealing surface of the valve clack to improve the sealing performance of the valve clack.

As a preferred technical scheme of the utility model: the valve clack is connected with the valve rod through a pressing sleeve.

As a preferred technical scheme of the utility model: and a gasket is arranged between the valve seat and the valve body.

As a preferred technical scheme of the utility model: the valve body is integrally forged.

As a preferred technical scheme of the utility model: the elastic piece is a disc spring.

By adopting the technical scheme, the utility model has the beneficial effects that: 1. when the valve is fully closed, the valve can achieve the function of completely cutting off the medium at a high sealing level, and the precision is not influenced in adjustment.

2. This valve is closing the in-process, and the valve clack moves in place, promptly, and the sealed face of valve clack contacts with the sealed face of disk seat completely, and the inside elastic component that is equipped with of rethread carries out the stroke compensation, reaches effectual sealed, has avoided executor stroke to target in place the valve clack not to position and has caused the leakage, and the sealed face that further causes damages, has improved valve life, and it is little to have thrust during the valve operation, adjusts in a flexible way, closes the good characteristics of back leakproofness.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

In the figure: 1. a valve body; 2. a valve stem; 3. a valve seat; 4. a gasket; 5. an elastic member; 6. a valve flap; 7. a valve seat.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "upper surface", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-2, an embodiment of the present invention is shown: a stroke compensation type soot blower regulating valve comprises a valve body 1, wherein the valve body 1 moves downwards through a valve clack 6 arranged on the valve body to cut off media passing through the interior of the valve body 1; the valve clack 6 is connected with the arranged valve rod 2, and an elastic piece 5 is arranged at the connection part of the valve rod 2 and the valve clack 6; the elastic piece 5 is used for providing power compensation for the movement of the valve clack 6; the valve body 1 is also internally provided with a valve seat 7, and the sealing surface of the valve seat 3 is matched with the sealing surface of the valve clack 6 to improve the sealing performance of the valve clack 6.

In conclusion, in the closing process of the valve, the valve clack 6 moves to the closing position, namely, the sealing surface of the valve clack 6 is in contact with the sealing surface of the valve seat 3, and then the sliding position compensation of the valve clack is carried out through the elastic piece 5 arranged inside the valve clack, so that the effective pressure sealing contact is achieved.

Furthermore, the valve clack 6 is connected with the valve rod 2 through a pressing sleeve 3. The valve clack 6, the valve rod 2, the elastic part 5 and the pressing sleeve 3 form a tight pressure type combination, so that the valve clack 6 has no vibration and hysteresis in working, the direction of the valve clack 6 can be flexibly and automatically adjusted, and the valve clack has a good automatic centering function when being closed.

Because the valve seat 7 with be equipped with gasket 4 between the valve body 1, consequently make valve seat 7 and valve body 1 be swing joint, have based on this, can conveniently take out in the maintenance, grind the restoration or whole renewal spare to the piece of treating.

Since the valve body 1 is integrally forged, the conventional disadvantages such as thermal stress due to welding are eliminated.

Furthermore, the elastic part 5 is a disc spring, so that the work is reliable, the working time of the elastic part 5 is long, and the problems of insensitive work, vibration and action lag of the valve caused by elastic failure of the elastic part 5 are solved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.

Claims

1. The utility model provides a stroke compensation formula soot blower governing valve which characterized in that: the valve comprises a valve body (1), wherein the valve body (1) moves downwards through a valve clack (6) arranged on the valve body to cut off media passing through the interior of the valve body (1);

the valve clack (6) is connected with a valve rod (2), and an elastic piece (5) is arranged at the connection part of the valve rod (2) and the valve clack (6); the elastic piece (5) is used for providing power compensation for the movement of the valve clack (6);

the valve is characterized in that a valve seat (7) is further arranged inside the valve body (1), and the sealing surface of the valve seat (7) is matched with the sealing surface of the valve clack (6) to improve the sealing performance of the valve clack (6).

2. A stroke compensating sootblower modulating valve as recited in claim 1, wherein: the valve clack (6) is connected with the valve rod (2) through a pressing sleeve (3) arranged on the valve clack.

3. A stroke compensating sootblower modulating valve as claimed in claim 2, wherein: and a gasket (4) is arranged between the valve seat (7) and the valve body (1).

4. A stroke compensating sootblower modulating valve as claimed in claim 1, 2 or 3, wherein: the valve body (1) is formed by integral forging.

5. The stroke compensating sootblower modulating valve of claim 4, wherein: the elastic piece (5) is a disc spring.