阅读说明：本技术 一种止回阀的阀瓣辅助启闭机构 (Valve clack auxiliary opening and closing mechanism of check valve ) 是由 陈安迪 于 2021-08-12 设计创作，主要内容包括：本发明涉及管道阀门技术领域,且公开了一种止回阀的阀瓣辅助启闭机构,包括阀体,所述阀体的中部活动安装有阀瓣,所述阀瓣的右端和阀体内腔中部的右侧通过弹簧活动连接,所述阀瓣中部的左侧设置有辅助腔。本发明通过设置辅助开启机构,使得在止回阀正常使用时,在阀体内腔左侧流通不断增多后,在压力增大的作用下,使得辅助腔内压力同步增大,从而使辅助块在压力的作用下向外伸出,并在辅助块的上端和阀体内腔中部的上方呈斜面的作用下,使得阀瓣受到向右的推力增大,进而使阀瓣逐渐打开,避免了由于止回阀使用时间过长或长时间不开启,导致其阀瓣发生锈蚀,无法打开的情况发生,且提高了止回阀的打开效率。(The invention relates to the technical field of pipeline valves and discloses a valve clack auxiliary opening and closing mechanism of a check valve. According to the invention, by arranging the auxiliary opening mechanism, when the check valve is normally used, after the circulation on the left side of the inner cavity of the valve body is increased continuously, the pressure in the auxiliary cavity is synchronously increased under the action of pressure increase, so that the auxiliary block extends outwards under the action of pressure, and the valve clack is subjected to rightward thrust increase under the action of the inclined plane formed by the upper end of the auxiliary block and the upper part of the middle part of the inner cavity of the valve body, so that the valve clack is gradually opened, the situation that the valve clack is corroded and cannot be opened due to overlong service time or long-time non-opening of the check valve is avoided, and the opening efficiency of the check valve is improved.)

1. The utility model provides a valve clack auxiliary opening and closing mechanism of check valve, includes valve body (1), its characterized in that: the middle part movable mounting of valve body (1) has valve clack (2), spring (3) swing joint is passed through on the right-hand member of valve clack (2) and the right side at valve body (1) inner chamber middle part, the left side at valve clack (2) middle part is provided with supplementary chamber (4), the one end opening in supplementary chamber (4) is located the left middle part of valve clack (2), and the other end opening in supplementary chamber (4) is located the top of valve clack (2), supplementary piece (5) have been cup jointed in the middle part activity in supplementary chamber (4), and the upper end of supplementary piece (5) and the top at valve body (1) inner chamber middle part all are the inclined plane form.

2. The valve flap auxiliary opening and closing mechanism of the check valve as claimed in claim 1, wherein: the right side at valve clack (2) middle part is provided with movable chamber (7), piston piece (8) have been cup jointed in the middle part activity in activity chamber (7), intercommunication groove (9) with supplementary chamber (4) and activity chamber (7) intercommunication are seted up to the inner chamber of valve clack (2), bellows (10) that are located supplementary piece (5) under are installed to the lower extreme fixed mounting in supplementary chamber (4) inner chamber, and the lower extreme of bellows (10) and the one end intercommunication in intercommunication groove (9), and all fill in the inner chamber of intercommunication groove (9) and the left activity chamber (7) of piston piece (8) and have fluid.

3. The valve flap auxiliary opening and closing mechanism of a check valve according to claim 2, characterized in that: the middle part fixed mounting of valve clack (2) has regulating plate (11) that is located between supplementary chamber (4) and activity chamber (7), regulating plate (11) and piston block (8) are magnetic material and make, and regulating plate (11) and communicating groove (9) adjacent end magnetic pole be different, the upper end of communicating groove (9) and the lower extreme fixed connection of supplementary piece (5).

4. The valve flap auxiliary opening and closing mechanism of a check valve according to claim 3, wherein: a fixture block (6) is movably sleeved in the middle of the valve clack (2), the fixture block (6) is made of a magnetic material, and magnetic poles of adjacent ends of the fixture block (6) and the adjusting plate (11) are the same.

5. The valve flap auxiliary opening and closing mechanism of the check valve as claimed in claim 1, wherein: the auxiliary cavity (4) and the left side of the inner cavity of the valve body (1) are connected through a small hole diameter.

Technical Field

The invention relates to the technical field of pipeline valves, in particular to a valve clack auxiliary opening and closing mechanism of a check valve.

Background

The check valve is a valve with a circular valve clack as an opening and closing part and acts by self weight and medium pressure to block medium backflow, belongs to the automatic valve class, and is also called a check valve, a one-way valve, a backflow valve or an isolation valve and the like, and is divided into a lifting type check valve, a swing type check valve and a butterfly type check valve, wherein the lifting type check valve achieves the opening and closing effect through the left and right movement of the valve clack.

Traditional over-and-under type check valve is at normal during operation, because valve clack live time overlength or do not open for a long time, can lead to phenomenons such as corrosion can appear between valve clack and the valve body, make the required thrust increase that the valve clack was opened, make when normal use, influence the start-up efficiency of check valve, and when the check valve seals, because the phenomenon of refluence in the twinkling of an eye can appear in the fluid, under the effect of water hammer effect, can make valve clack and pipeline receive great impact, thereby influence the life of check valve and pipeline.

Disclosure of Invention

Aiming at the defects of the prior check valve in the use process, the invention provides the valve clack auxiliary opening and closing mechanism of the check valve, which has the advantages of auxiliary opening and closing buffering and solves the technical problem that the valve clack is damaged by the water hammer effect when the valve clack needs larger pressure to open and close due to corrosion and the like during normal use of the check valve.

The invention provides the following technical scheme: the utility model provides an opening and closing mechanism is assisted to valve clack of check valve, includes the valve body, the middle part movable mounting of valve body has the valve clack, spring swing joint is passed through on the right-hand member of valve clack and the right side at valve body inner chamber middle part, the left side at valve clack middle part is provided with supplementary chamber, the one end opening in supplementary chamber is located the left middle part of valve clack, and the other end opening in supplementary chamber is located the top of valve clack, supplementary piece has been cup jointed in the middle part activity in supplementary chamber, and the upper end of supplementary piece and the top at valve body inner chamber middle part all are the inclined plane form.

Preferably, the right side at valve clack middle part is provided with movable chamber, the piston piece has been cup jointed in the middle part activity in movable chamber, the intercommunication groove with supplementary chamber and activity chamber intercommunication is seted up to the inner chamber of valve clack, the lower extreme fixed mounting of supplementary chamber inner chamber has the bellows that is located under the supplementary block, and the lower extreme of bellows and the one end intercommunication in intercommunication groove, and the inner chamber in intercommunication groove and the left movable intracavity of piston piece all fill fluid.

Preferably, an adjusting plate located between the auxiliary cavity and the movable cavity is fixedly installed in the middle of the valve flap, the adjusting plate and the piston block are made of magnetic materials, magnetic poles of adjacent ends of the adjusting plate and the communicating groove are different, and the upper end of the communicating groove is fixedly connected with the lower end of the auxiliary block.

Preferably, a clamping block is movably sleeved in the middle of the valve clack, the clamping block is made of a magnetic material, and magnetic poles of adjacent ends of the clamping block and the adjusting plate are the same.

Preferably, the aperture of the auxiliary cavity connected with the left side of the inner cavity of the valve body is smaller.

The invention has the following beneficial effects:

1. according to the invention, by arranging the auxiliary opening mechanism, when the check valve is normally used, after the circulation on the left side of the inner cavity of the valve body is increased continuously, the pressure in the auxiliary cavity is synchronously increased under the action of pressure increase, so that the auxiliary block extends outwards under the action of pressure, and the valve clack is subjected to rightward thrust increase under the action of the inclined plane formed by the upper end of the auxiliary block and the upper part of the middle part of the inner cavity of the valve body, so that the valve clack is gradually opened, the situation that the valve clack is corroded and cannot be opened due to overlong service time or long-time non-opening of the check valve is avoided, and the opening efficiency of the check valve is improved.

2. According to the invention, by arranging the closing buffer mechanism, when the check valve is closed, under the action of quickly reducing the liquid pressure at the left side of the inner cavity of the valve body, the fluid at the right end of the pipeline and the right end of the valve body quickly flows back, and impacts the piston block in the movable cavity, so that the piston block moves leftwards, and generates pressure on the oil in the movable cavity, so that the oil moves into the corrugated pipe, the corrugated pipe is extended, the auxiliary block is jacked upwards, the upper end of the auxiliary block is contacted with the upper part of the middle part of the inner cavity of the valve body, the friction force borne by the valve clack during resetting is increased, the resetting speed of the valve clack is slowed down, and the condition that when the check valve is closed, the fluid can quickly flow backwards, so that the water hammer efficiency is generated, and the loss is generated on the check valve and the pipeline is avoided.

3. According to the invention, through the matching of the closing buffer mechanism and the auxiliary opening mechanism, when the auxiliary opening mechanism works normally, the valve flap is opened, and when fluid in a pipeline circulates normally, the flow rate of the fluid on the right side of the valve flap is larger, so that under the action of the Bernoulli principle, negative pressure is formed on the right side of the piston block, the piston block moves rightwards, the pressure on the left side of the piston block is reduced, the pressure in the corrugated pipe is synchronously reduced, the corrugated pipe drives the auxiliary block to contract inwards, the friction force between the valve flap and the inner cavity of the valve body when the check valve is in an opening state is reduced, the valve flap can be opened to the maximum extent, and the situation that the friction force between the valve flap and the inner cavity of the valve body is larger and the flow efficiency of the fluid in the check valve is influenced because the auxiliary opening mechanism is continuously in the opening state is avoided.

Drawings

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

FIG. 2 is a schematic structural diagram of the working state of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention.

In the figure: 1. a valve body; 2. a valve flap; 3. a spring; 4. an auxiliary chamber; 5. an auxiliary block; 6. a clamping block; 7. a movable cavity; 8. a piston block; 9. a communicating groove; 10. a bellows; 11. an adjusting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, an auxiliary opening/closing mechanism for a valve flap of a check valve comprises a valve body 1, a valve flap 2 is movably mounted in the middle of the valve body 1, the right end of the valve flap 2 is movably connected with the right side of the middle of an inner cavity of the valve body 1 through a spring 3, an auxiliary cavity 4 is arranged on the left side of the middle of the valve flap 2, one end opening of the auxiliary cavity 4 is located in the middle of the left side of the valve flap 2, the other end opening of the auxiliary cavity 4 is located above the valve flap 2, an auxiliary block 5 is movably sleeved in the middle of the auxiliary cavity 4, the auxiliary block 5 is located in a vertical hole in the middle of the auxiliary cavity 4, so that when the check valve is in a closed state and needs to be opened, fluid can flow into the auxiliary cavity 4 through a transverse hole of the auxiliary cavity 4 under the action of increasing the fluid pressure on the left side of the inner cavity of the valve body 1, the pressure in the auxiliary cavity 4 is synchronously increased, the auxiliary block 5 is pushed outwards under the action of pressure, and the upper end of the inclined plane block 5 and the upper end of the middle of the upper part of the inner cavity of the valve body 1 are both in a shape, after the auxiliary block 5 is ejected outwards, the valve clack 2 can generate a reaction force moving rightwards under the action of continuously increasing pressure between the auxiliary block 5 and the upper part of the middle part of the inner cavity of the valve body 1, so that the starting efficiency of the check valve under the same fluid pressure state is increased.

Referring to fig. 1-2, a movable chamber 7 is disposed on the right side of the middle portion of the valve flap 2, a piston block 8 is movably sleeved on the middle portion of the movable chamber 7, the piston block 8 is located in the middle of the inner chamber of the movable chamber 7 in a normal state, a communicating groove 9 communicating the auxiliary chamber 4 with the movable chamber 7 is disposed in the inner chamber of the valve flap 2, the left side of the movable chamber 7 is communicated with the lower portion of the auxiliary chamber 4 through the communicating groove 9, a bellows 10 located right below the auxiliary block 5 is fixedly mounted at the lower end of the inner chamber of the auxiliary chamber 4, the lower end of the bellows 10 is communicated with one end of the communicating groove 9, and oil is filled in the inner chamber of the communicating groove 9 and the movable chamber 7 on the left side of the piston block 8, so that the bellows 10 can extend and contract under the pressure change of the piston block 8, and when the check valve is in a closed state, the fluid pressure on the left side of the check valve can be rapidly reduced, when the pressure generated by the backflow of the fluid on the right side of the check valve is enabled, the piston block 8 is pressurized leftwards, so that the oil in the movable cavity 7 moves towards the communicating groove 9 rapidly, the communicating groove 9 stretches rapidly, the auxiliary block 5 is ejected outwards, and under the action of the fluid on the piston block 8, the friction force between the auxiliary block 5 and the upper portion of the middle portion of the inner cavity of the valve body 1 is large, and the closing rate of the valve clack 2 is reduced.

Referring to fig. 3, an adjusting plate 11 located between the auxiliary chamber 4 and the movable chamber 7 is fixedly installed in the middle of the valve flap 2, the adjusting plate 11 and the piston block 8 are made of magnetic materials, and the adjacent ends of the adjusting plate 11 and the communicating groove 9 have different magnetic poles, so that in a normal state, the piston block 8 always generates a certain pressure on oil in the inner chamber of the movable chamber 7 and the communicating groove 9 under the action of magnetic attraction, thereby avoiding the situation that the piston block 8 cannot be kept in the middle of the movable chamber 7 due to accumulation under the inner chamber of the movable chamber 7 under the action of gravity in the movable chamber 7, the upper end of the communicating groove 9 is fixedly connected with the lower end of the auxiliary block 5, so that the piston block 8 located in the middle of the inner chamber of the movable chamber 7 can move rightwards under the action of bernoulli principle under the action of rapid flow of the check valve when the auxiliary opening mechanism works normally, thereby make the intercommunication groove 9 drive supplementary piece 5 shrink under the effect of negative pressure for when the check valve is in under the state of normal work, supplementary piece 5 can not lead to the fact the stopping to opening of valve clack 2, has ensured the fluidic circulation rate in the check valve.

Referring to fig. 3, a fixture block 6 is movably sleeved at the middle of the valve flap 2, the fixture block 6 limits the position of the auxiliary block 5 in a normal state, and when the auxiliary opening mechanism normally works, the fixture block 6 can be pressed back inwards under the action of fluid pressure, so that the auxiliary block 5 normally extends outwards, the fixture block 6 is made of a magnetic material, and the magnetic poles of the adjacent ends of the fixture block 6 and the adjusting plate 11 are the same, so that after the pressure applied to the fixture block 6 disappears, the fixture block 6 can move outwards under the action of magnetic repulsion between the fixture block 6 and the adjusting plate 11, and the fixture block 6 is further in a state of limiting the auxiliary block 5 all the time.

Referring to fig. 1-2, the aperture of the left side of the auxiliary chamber 4 connected to the left side of the inner chamber of the valve body 1 is small, so that when the check valve is in a gradually closed state, the outflow rate of the fluid in the inner chamber of the auxiliary chamber 4 is slow, and it is ensured that the fixture block 6 is subjected to inward pressure when the closed buffer mechanism normally works, thereby avoiding the situation that the fixture block 6 is reset at a fast rate and the auxiliary block 5 is influenced to normally extend outward.

The using method of the invention is as follows:

auxiliary opening: when the check valve is normally used, after the circulation on the left side of the inner cavity of the valve body 1 is increased continuously, under the action of pressure increase, the pressure in the auxiliary cavity 4 is increased synchronously, so that the auxiliary block 5 extends outwards under the action of pressure, and under the action of an inclined plane above the upper end of the auxiliary block 5 and the middle part of the inner cavity of the valve body 1, the valve clack 2 is pushed to be increased rightwards, and the valve clack 2 is opened gradually;

closing and buffering: when the check valve is closed, under the action of rapid reduction of the liquid pressure at the left side of the inner cavity of the valve body 1, fluid at the right end of the pipeline and the valve body 1 rapidly flows back, and impacts a piston block 8 in a movable cavity 7, so that the piston block 8 moves leftwards, and pressure is generated on oil in the movable cavity 7, so that the oil moves into a corrugated pipe 10, the corrugated pipe 10 is further extended, an auxiliary block 5 is jacked upwards, the upper end of the auxiliary block 5 is in contact with the upper part of the middle part of the inner cavity of the valve body 1, the friction force borne by the valve clack 2 during resetting is increased, and the resetting rate of the valve clack 2 is further slowed down;

through the cooperation of closed buffer gear and supplementary opening mechanism, make when supplementary opening mechanism normally works, open at valve clack 2, when the fluid normally circulates in the pipeline, valve clack 2 right side fluid flow rate is great, make under the effect of bernoulli's principle, 8 right sides of piston block form the negative pressure, thereby make piston block 8 move to the right, make 8 left side pressure of piston block reduce, and make bellows 10 internal pressure reduce in step, make bellows 10 drive auxiliary block 5 and inwards contract, thereby reduced the frictional force between valve clack 2 and the 1 inner chamber of valve body when the check valve is in the open mode, make valve clack 2 can the maximum open.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.