CN212360273U - Anti-surge control valve - Google Patents

Abstract

The utility model relates to an anti-surge control valve, which comprises a valve, a bracket fixed at the upper end of the valve, a supporting component arranged in the bracket and a transmission mechanism arranged on the supporting component and connected with the valve; the utility model can prevent the valve core of the valve from moving up and down when the medium flow pressure fluctuates frequently and violently, thereby preventing the valve core from impacting the inside of the valve frequently, and simultaneously effectively avoiding the impact force from being transmitted to the actuating mechanism, thereby greatly prolonging the service life of the valve and the actuating mechanism, further greatly reducing the maintenance and replacement frequency, thereby improving the working efficiency and reducing the use cost; in addition, the output force arm of the actuating mechanism is transmitted to the screw rod after being amplified by the gear, the first bevel gear and the second bevel gear, so that the operation is more labor-saving; moreover, the utility model is suitable for all straight stroke valves, application scope is wider.

Description

Anti-surge control valve

Technical Field

The utility model relates to an anti-surge control valve.

Background

When the output pressure is constant and the flow is reduced to be below the surge point in the running process of the compressor, the compressor can not compress gas continuously in physics, and surging occurs; at the moment, the gas discharge amount can generate violent oscillation, the compressor can also vibrate violently, and a roaring sound similar to asthma is emitted, the machine emits periodic intermittent huge noise, so that bearings and sealing rings of all parts of the compressor are damaged, the vibration and the shaking of blades are caused, and in serious cases, an impeller is broken, a bearing bush is burnt out, and the compressor is seriously damaged.

At the moment of surging, measures are needed to increase the flow of the unit or reduce the outlet pressure, so that the unit is prevented from entering a surging area, and the compressor is prevented from being damaged; one of the commonly used methods for preventing compressor from surging is to install an anti-surging control valve on a bypass of the compressor to return a part of outlet gas to an inlet to keep the gas amount in the compressor always larger than a surging point flow value; another is to install an anti-surge control valve at the outlet of the compressor to quickly vent the gas at the outlet, thereby reducing the outlet pressure.

However, no matter which method is adopted, the valve core of the existing anti-surge control valve always moves abnormally and frequently due to frequent and severe fluctuation of medium flow pressure, and in addition, the movement of the valve core can be transmitted into the actuating mechanism to force the actuating mechanism to move abnormally and frequently, so that the damage of the valve core and the actuating mechanism is accelerated, the service life is short, the maintenance and replacement frequency is high, the working efficiency is low, and the use cost is high; and are subject to further improvement.

SUMMERY OF THE UTILITY MODEL

To the current situation of above-mentioned prior art, the utility model aims to solve the technical problem that a life who prolongs valve and actuating mechanism by a wide margin is in order to reduce the maintenance and change the frequency by a wide margin to improve work efficiency, reduced use cost's anti-surge control valve is provided.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: an anti-surge control valve comprises a valve body, a support fixed at the upper end of the valve body, a support assembly arranged in the support and a transmission mechanism arranged on the support assembly and connected with the valve body, and is characterized in that the transmission mechanism comprises a rack, a gear, a rotating shaft, a first bevel gear, a second bevel gear, a lead screw and a rotation stopping pin; the rotating shaft is transversely and rotatably arranged in the supporting assembly, the gear and the first bevel gear are respectively sleeved and fixed at the left end and the right end of the rotating shaft, the rack is vertically arranged and meshed at the rear side of the gear, the screw rod is vertically arranged in the supporting assembly, can slide up and down and is arranged at the right side of the rotating shaft, and the second bevel gear is sleeved and screwed on the screw rod and meshed at the lower side of the first bevel gear; the rotation stopping pin is transversely fixed in the screw rod in an inserting manner and is arranged below the second bevel gear; the supporting assembly comprises a supporting plate, a side plate, a supporting plate, a first L-shaped plate, a second L-shaped plate, a third L-shaped plate, a first supporting pipe and a second supporting pipe; the supporting plate is transversely fixed in the support, the side plate is vertically fixed on the left side of the upper plane of the supporting plate, the supporting plate is transversely fixed between the upper end of the side plate and the left side of the support, the first L-shaped plate is arranged above the supporting plate and on the right side of the side plate, the right end of the first L-shaped plate is fixed on the right side of the support, the first supporting pipes comprise a plurality of pipes, and the plurality of first supporting pipes are transversely fixed between the side plate and the upper end of the first L-shaped plate; the second supporting pipes comprise a plurality of second supporting pipes which are vertically fixed between the first L-shaped plate and the supporting plate; the third L-shaped plates comprise two third L-shaped plates which are fixed on the lower plane of the supporting plate and symmetrically arranged on the left side and the right side of the screw rod.

Preferably, two of the third L-shaped plates are provided with a vertically running slot, and two ends of the rotation stopping pin are respectively inserted into the two slots.

Preferably, the rotating shaft is transversely and rotatably inserted between the side plate and the first L-shaped plate, and the lead screw is vertically inserted between the first L-shaped plate and the supporting plate and can slide up and down.

Compared with the prior art, the utility model has the advantages of: the utility model can prevent the valve core of the valve from moving up and down when the medium flow pressure fluctuates frequently and violently, thereby preventing the valve core from impacting the inside of the valve frequently, and simultaneously effectively avoiding the impact force from being transmitted to the actuating mechanism, thereby greatly prolonging the service life of the valve and the actuating mechanism, further greatly reducing the maintenance and replacement frequency, thereby improving the working efficiency and reducing the use cost; in addition, the output force arm of the actuating mechanism is transmitted to the screw rod after being amplified by the gear, the first bevel gear and the second bevel gear, so that the operation is more labor-saving; moreover, the utility model is suitable for all straight stroke valves, application scope is wider.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

fig. 2 is a sectional view in the direction a of the present invention.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

As shown in fig. 1-2, an anti-surge control valve comprises a valve 1, a bracket 2 fixed at the upper end of the valve 1, a support component arranged in the bracket 2 and a transmission mechanism arranged on the support component and connected with the valve 1; the transmission mechanism comprises a rack 14, a gear 4, a rotating shaft 18, a first bevel gear 9, a second bevel gear 10, a lead screw 13 and a rotation stopping pin 17; the rotating shaft 18 is transversely and rotatably arranged in the supporting assembly, the gear 4 and the first bevel gear 9 are respectively sleeved and fixed at the left end and the right end of the rotating shaft 18, the rack 14 is vertically arranged and meshed at the rear side of the gear 4, the screw 13 is vertically arranged in the supporting assembly and can slide up and down and is arranged at the right side of the rotating shaft 18, and the second bevel gear 10 is sleeved and screwed on the screw 13 and meshed at the lower side of the first bevel gear 9; the rotation stop pin 17 is transversely inserted and fixed in the screw 13 and is arranged below the second bevel gear 10.

The supporting component comprises a supporting plate 3, a side plate 5, a supporting plate 6, a first L-shaped plate 12, a second L-shaped plate 15, a third L-shaped plate 16, a first supporting pipe 8 and a second supporting pipe 11; the supporting plate 3 is transversely fixed in the support 2, the side plate 5 is vertically fixed on the left side of the upper plane of the supporting plate 3, the supporting plate 6 is transversely fixed between the upper end of the side plate 5 and the left side of the support 2, the first L-shaped plate 12 is arranged above the supporting plate 3 and on the right side of the side plate 5, the right end of the first L-shaped plate 12 is fixed on the right side of the support 2, the first supporting pipes 8 comprise a plurality of pipes, and the plurality of first supporting pipes 8 are transversely fixed between the side plate 5 and the upper end of the first L-shaped plate 12; the second supporting pipes 11 comprise a plurality of second supporting pipes 11 which are vertically fixed between the first L-shaped plate 12 and the supporting plate 3; the third L-shaped plates 16 comprise two, and the two third L-shaped plates 16 are fixed on the lower plane of the supporting plate 3 and symmetrically arranged on the left side and the right side of the screw rod 13.

Two vertical slotted holes 161 are formed in each of the third L-shaped plates 16, and two ends of the rotation stopping pin 17 are respectively inserted into the two slotted holes 161.

The rotating shaft 18 is transversely and rotatably arranged between the side plate 5 and the first L-shaped plate 12 in an inserting mode, and the screw rod 13 is vertically arranged between the first L-shaped plate 12 and the supporting plate 3 in an inserting mode.

Before use, the actuator 7 is fixed at the upper end of the bracket 2, the push rod 71 on the actuator 7 vertically extends downwards into the bracket 2, the rack 14 is fixed on the push rod 71, and the lower end of the lead screw 13 is fixed with the valve rod 101 of the valve 1.

Working principle; when the push rod of the actuating mechanism 7 moves up and down, the rack 14 is driven to move up and down, and the gear 4 meshed with the rack 14 is driven to rotate; the first bevel gear 9 is driven to rotate by the rotating shaft 18, and the second bevel gear 10 is driven to rotate, so that the screw 13 is driven to move up and down according to the principle of threaded connection, the rotation stop pin 17 is arranged to prevent the screw 13 from rotating, and the limit position of the up and down movement of the screw 13 is limited by the two slotted holes 161; finally, the up and down movement of the screw 13 drives the valve rod 101 in the valve 1 to move up and down, thereby driving the valve core 102 in the valve 1 to move up and down.

Principle of preventing abnormal movement of valve internals: when the medium pressure in the pipeline is unstable, the valve core 102 is pushed by the medium pressure to move up and down, and then is transmitted to the screw 13 along the valve rod 101 and then is transmitted to the second bevel gear 10, because the thread lead angle of the screw 13 is smaller than the equivalent friction angle, the reverse self-locking during the movement of the valve rod 101 can be realized, namely, the screw 13 can only be driven by the second bevel gear 10 to move, and the screw 13 cannot drive the second bevel gear 10 to rotate; the reverse self-locking performance can avoid the valve core 102 from moving up and down due to medium pressure fluctuation, most of the impact force acts on the second bevel gear 10, the impact force is also prevented from being transmitted to the actuating mechanism 7, and the safety protection effect on the valve core 102, the actuating mechanism 7 and accessories is achieved.

The utility model can prevent the valve core of the valve from moving up and down when the medium flow pressure fluctuates frequently and violently, further prevent the valve core from impacting the inside of the valve frequently, and simultaneously effectively avoid the impact force from being transmitted to the actuating mechanism 7, thereby greatly prolonging the service life of the valve 1 and the actuating mechanism 7, further greatly reducing the maintenance and replacement frequency, further improving the working efficiency and reducing the use cost; in addition, the output force arm of the actuating mechanism 7 is amplified by the gear 4, the first bevel gear 9 and the second bevel gear 10 and then transmitted to the screw 13, so that the operation is more labor-saving; moreover, the utility model is suitable for all straight stroke valves, application scope is wider.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (3)

1. An anti-surge control valve comprises a valve body, a support fixed at the upper end of the valve body, a support assembly arranged in the support and a transmission mechanism arranged on the support assembly and connected with the valve body, and is characterized in that the transmission mechanism comprises a rack, a gear, a rotating shaft, a first bevel gear, a second bevel gear, a lead screw and a rotation stopping pin; the rotating shaft is transversely and rotatably arranged in the supporting assembly, the gear and the first bevel gear are respectively sleeved and fixed at the left end and the right end of the rotating shaft, the rack is vertically arranged and meshed at the rear side of the gear, the screw rod is vertically arranged in the supporting assembly, can slide up and down and is arranged at the right side of the rotating shaft, and the second bevel gear is sleeved and screwed on the screw rod and meshed at the lower side of the first bevel gear; the rotation stopping pin is transversely fixed in the screw rod in an inserting manner and is arranged below the second bevel gear; the supporting assembly comprises a supporting plate, a side plate, a supporting plate, a first L-shaped plate, a second L-shaped plate, a third L-shaped plate, a first supporting pipe and a second supporting pipe; the supporting plate is transversely fixed in the support, the side plate is vertically fixed on the left side of the upper plane of the supporting plate, the supporting plate is transversely fixed between the upper end of the side plate and the left side of the support, the first L-shaped plate is arranged above the supporting plate and on the right side of the side plate, the right end of the first L-shaped plate is fixed on the right side of the support, the first supporting pipes comprise a plurality of pipes, and the plurality of first supporting pipes are transversely fixed between the side plate and the upper end of the first L-shaped plate; the second supporting pipes comprise a plurality of second supporting pipes which are vertically fixed between the first L-shaped plate and the supporting plate; the third L-shaped plates comprise two third L-shaped plates which are fixed on the lower plane of the supporting plate and symmetrically arranged on the left side and the right side of the screw rod.

2. The anti-surge control valve according to claim 1, wherein a vertically-oriented slot is formed in each of the two third L-shaped plates, and both ends of the rotation stop pin are respectively inserted into the two slots.

3. The anti-surge control valve according to claim 1, wherein the rotating shaft is horizontally and rotatably inserted between the side plate and the first L-shaped plate, and the lead screw is vertically inserted between the first L-shaped plate and the supporting plate and can slide up and down.

Images