CN214036929U - Water hammer-proof exhaust valve structure - Google Patents

Abstract

The utility model discloses a water hammer-proof exhaust valve structure, which comprises a protective cover, a throttle valve body and an exhaust valve, wherein the bottom end of the protective cover is connected with a valve body, the bottom end of the valve body is connected with the exhaust valve, the top end of the throttle valve body is embedded and installed with a throttle valve cover at the bottom position of the protective cover, a throttle valve core is embedded and installed at the middle part of the throttle valve body below the throttle valve cover, a ball basket is embedded and placed at the middle part of the exhaust valve, a floating ball is embedded and installed in the ball basket, the utility model has scientific and reasonable structure and safe and convenient use, the anti-closure water hammer exhaust valve adopts an integrated structure and is formed by connecting an upper composite air inlet and exhaust valve and a lower throttle valve, the exhaust valve has simple structural design, reliable operation and durability, no lever, connecting rod, rotating shaft and other mechanical moving parts, and no dislocation caused by mechanical abrasion, air valve failure caused by faults such as jamming, breakage, deformation, welding and the like.

Description

Water hammer-proof exhaust valve structure

Technical Field

The utility model relates to a plumbing technical field specifically is a waterproof hammer discharge valve structure.

Background

The water hammer is also called as a water hammer, and is a phenomenon that a pipeline or a container which bears the flowing of steam or water is subjected to sound and vibration due to impact force generated by the sudden generation of the steam or the water, the water hammer is generated under the condition that the flowing of a working medium is not smooth, most of the water hammers in a power plant form air plugs and water plug obstacles due to water accumulation or drainage difficulty of a steam pipeline, so that high-speed steam cannot smoothly pass through, and then the steam impacts the water plugs to generate great sound and strong vibration, even serious damage to equipment is caused, because compressibility is considered in a high-pressure container even if liquid is used, a water hammer accident is a large enemy of the power plant, strong vibration of the pipeline is caused by light, a support and hanger of the pipeline is damaged by heavy, a welded joint of an elbow of the pipeline is torn, and if the water hammer accident occurs in a steam turbine, the damage caused by the water hammer accident is larger: the blades of the steam turbine are damaged, and the cold water impacts the hot steam turbine to generate huge thermal stress on a cylinder and a large shaft, so that the cylinder and a rotor are directly deformed and bent, cracks are generated or expanded, the steam turbine is seriously damaged, and even the whole unit is scrapped;

the basic structure and the calculation method of the exhaust valve can be obtained according to GB/T36523-2018, but the following defects exist in the exhaust valve in the standard:

(1) the water delivery efficiency is low: the valve core is positioned in the exhaust channel, when high-pressure airflow is exhausted, the valve is easy to blow and block, the exhaust is incomplete, an air bag plug is formed, and the water delivery efficiency is reduced;

(2) the exhaust passage is susceptible to clogging: the floating ball and the sealing pair are directly contacted with a fluid medium, so that dirt is easy to enter, and an exhaust channel is blocked;

(3) freezing is easy to occur: the main sealing pair is directly contacted with water, so that the freezing is easy to occur under the low-temperature condition, and the exhaust valve cannot work normally;

(4) no anti-bridging water hammer function: it can only meet the requirements of high-speed air intake and exhaust and trace exhaust, and when the water-filling speed is too high, it can not limit exhaust so as to prevent the generation of closing water hammer.

SUMMERY OF THE UTILITY MODEL

The utility model provides a waterproof hammer discharge valve structure can effectively solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a vent valve structure for a waterproof hammer comprises a protective cover, a throttle valve body and a vent valve, wherein the throttle valve body is connected to the bottom end of the protective cover, and the vent valve is connected to the bottom end of the throttle valve body;

the top end of the throttle valve body is embedded with a throttle valve cover at the bottom end of the protective cover, and a throttle valve core is embedded in the middle of the throttle valve body below the throttle valve cover;

the ball basket is placed in the middle of the exhaust valve in an embedded mode, the floating ball is installed in the ball basket in an embedded mode, the movable valve core is placed at the top end of the floating ball, the valve seat sealing ring is embedded into the position, located at the lower portion of the inlet of the throttle valve body, of the top of the inner side of the ball basket through the groove, and the exhaust valve cover is installed at the top of the exhaust valve in an embedded mode.

Preferably, the movable valve core is in an inverted concave shape, two ends of the movable valve core can be in fit contact with the floating ball under the condition of no water, and a micro-row valve seat is embedded in the center of the top end of the movable valve core.

Preferably, the top end of the protective cover is connected with a ring nut, an air inlet is formed in the position below the side face of the exhaust valve, and the air inlet is blocked through a bolt.

Preferably, the inner diameter of the ball basket is 2mm larger than the outer diameter of the floating ball.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages of being scientific and reasonable in structure, convenience safe in utilization:

1. the anti-bridging water hammer exhaust valve is of an integrated structure and is formed by connecting a composite intake and exhaust valve and a throttle valve, the exhaust valve is simple in structural design, reliable in work and durable in use, no lever, connecting rod, rotating shaft and other mechanical moving parts are arranged in the valve, and air valve failure caused by mechanical abrasion, dislocation, clamping, fracture, deformation, open welding and other faults can be avoided;

2. the exhaust valve cover has the function of assisting the rubber sealing surface to support, can bear the pipeline internal pressure transmitted by a floating ball or other components after the rubber sealing surface is compressed to a certain degree, and the rubber sealing surface is not continuously pressed so as to prevent the faults of accelerated aging of rubber and the like caused by crushing, adhesion and long-term continuous pressure bearing of sealing rubber;

3. the floating ball of the exhaust valve is a spherical free floating ball which is not connected with other parts in the valve, and has enough free moving space, and the ball basket has a guiding function, so that the phenomena of leakage and impurity blockage caused by dislocation and blockage of the floating ball can be avoided;

4. the micro-exhaust part consists of a floating ball, a movable valve core and a micro-exhaust valve seat, the floating ball is a spherical free hollow ball, is not connected with other parts in the valve and has enough free moving space, so that the phenomena of leakage and impurity blockage caused by dislocation and blockage of the floating ball can be avoided, the floating ball is contacted with the micro-exhaust valve seat when rising and is automatically centered through the inner wall of the ball basket, the micro-exhaust low-pressure sealing is ensured, and the influence of water spraying on the operation of other equipment is avoided; when the pipeline normally runs, gas in water is separated out, the buoyancy force is reduced along with the increase of the volume of the gas, and the floating ball is separated from the micro exhaust valve seat, so that high-pressure exhaust is realized;

5. the internal channel of the exhaust valve meets the hydromechanics requirement, the ball basket can play a role in flow guiding and isolating, blockage caused by blowing and impurity pollution due to airflow impact can be avoided, and the air inlet and exhaust channel is smooth and free of obstruction;

6. the impact of the airflow on the floating ball and the movable valve core under the drainage action of the ball basket is very small, so that the floating ball can be effectively prevented from being disturbed by high-speed airflow and colliding with the valve body to deform or break;

7. the water hammer prevention exhaust valve part adopts a structure form of quick absorption and slow discharge, a quick absorption channel is not smaller than a nominal drift diameter, the exhaust function is normal exhaust when the gas pressure difference is less than or equal to 1.5KPa, when the pressure difference is higher than 1.5KPa, the throttle valve core rises under the action of the pressure difference, the exhaust channel is reduced, the exhaust speed is reduced, so that part of gas is intercepted to form a buffer air bag, and the function of preventing closing water hammer is achieved;

8. when the movable valve core and the exhaust valve sealing ring are in contact sealing, a section of high-pressure air cavity is formed between the valve body and the ball basket, and the sealing part cannot be frozen at low temperature.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

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

FIG. 2 is a schematic view of the structure of the exhaust-limiting state of the present invention;

FIG. 3 is a schematic view of the structure of the mass exhaust state of the present invention;

FIG. 4 is a schematic view of the micro-exhaust state structure of the present invention;

fig. 5 is a schematic structural view of the rapid air suction state of the present invention;

reference numbers in the figures: 1. a protective cover;

2. a throttle body; 201. a throttle valve cover; 202. a throttle valve cartridge;

3. an exhaust valve; 301. a ball basket; 302. a floating ball; 303. a micro-row valve seat; 304. a movable valve core; 305. a valve seat sealing ring; 306. an exhaust valve cover.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in fig. 1-5, the utility model provides a technical scheme, a water hammer vent valve structure, including protection casing 1, throttle valve body 2 and discharge valve 3, protection casing 1 bottom is connected with throttle valve body 2, and throttle valve body 2 bottom is connected with discharge valve 3, and protection casing 1 top is connected with ring nut, can be convenient for better installation, and discharge valve 3 side below the position department set up the air inlet, and the air inlet is blocked up through the bolt, has made things convenient for the high pressure test of row a little;

a throttle valve cover 201 is embedded and installed at the bottom end of the protective cover 1 at the top end of the throttle valve body 2, and a throttle valve core 202 is embedded and installed in the middle of the throttle valve body 2 below the throttle valve cover 201;

basket 301 has been placed in the embedding of 3 middle parts of discharge valve, floater 302 is installed in the inside embedding of basket 301, activity case 304 has been placed to floater 302 top position department, for the convenience of better laminating, activity case 304 is the spill, and both ends and floater 302 can laminate the contact under anhydrous condition, the top central point department of putting of activity case 304 imbeds has little row of valve seat 303, there is valve seat sealing washer 305 at the below position department that is located the import of throttle body 2 at the inboard top of basket 301 through the recess embedding, discharge valve lid 306 is installed in the embedding of 3 tops of discharge valve.

The utility model discloses a theory of operation and use flow: when the pipeline works normally, the movable valve core 304 and the floating ball 302 are positioned in the ball basket 301 at the moment, the pipeline is not influenced by air flow when exhausting or sucking air, when exhausting is to be exhausted, the water level in the exhaust valve 3 rises to enter the ball basket 301, the movable valve core 304 and the floating ball 302 reach a sealing position before the water level under the action of buoyancy, sealing specific pressure is established to finish sealing, and low-pressure sealing is ensured;

and because the gas mixed and separated from the water is accumulated on the upper part of the exhaust valve 3, the buoyancy of the floating ball 302 is reduced along with the reduction of the water level in the valve along with the increase of the volume of the gas, the floating ball 302 is separated from the micro exhaust valve seat 303, the high-pressure exhaust is realized, the floating ball 302 is separated from the micro exhaust valve seat 303 under the action of the pressure difference and the gravity, the micro exhaust hole channel is opened, when the pressure is reduced after the gas is discharged, the water level in the valve is raised, the floating ball 302 floats upwards under the action of the buoyancy force to be contacted and centered with the micro-discharge valve seat 303, the sealing specific pressure is established to ensure the micro-discharge sealing, in the process, the movable valve core 304 is always in contact with the valve seat sealing ring 305 under the action of medium pressure, the floating ball 302 is in contact with the micro-exhaust valve seat 303 before being compared with a waterline after rising, and the trapped gas plays a role in protecting the micro-exhaust valve seat 303, so that the micro-exhaust part cannot be in contact with water, and therefore the micro-exhaust function failure caused by impurities is avoided.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. The utility model provides a waterproof hammer discharge valve structure which characterized in that: the air conditioner comprises a protective cover (1), a throttle valve body (2) and an exhaust valve (3), wherein the throttle valve body (2) is connected to the bottom end of the protective cover (1), and the exhaust valve (3) is connected to the bottom end of the throttle valve body (2);

the top end of the throttle valve body (2) is embedded with a throttle valve cover (201) at the bottom end of the protective cover (1), and a throttle valve core (202) is embedded in the middle of the throttle valve body (2) below the throttle valve cover (201);

the ball basket (301) has been placed in exhaust valve (3) middle part embedding, floater (302) are installed in the inside embedding of ball basket (301), movable valve core (304) have been placed to floater (302) top position department, there is valve seat sealing washer (305) at the below position department that is located throttle valve body (2) import at the inboard top of ball basket (301) through the recess embedding, exhaust valve lid (306) are installed in exhaust valve (3) top embedding.

2. The vent valve structure of a waterproof hammer according to claim 1, wherein the movable valve core (304) is in an inverted concave shape, two ends of the movable valve core can be in contact with the floating ball (302) in a fitting manner under the condition of no water, and a micro-vent valve seat (303) is embedded in the center of the top end of the movable valve core (304).

3. The vent valve structure of the waterproof hammer according to claim 1, wherein a ring nut is connected to the top end of the protective cover (1), an air inlet is formed in the lower position of the side face of the vent valve (3), and the air inlet is blocked through a bolt.

4. A water hammer prevention vent valve structure according to claim 1, wherein the inner diameter of the ball basket (301) is 2mm larger than the outer diameter of the floating ball (302).

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