阅读说明：本技术 一种新式止回阀及其开启止回方法 (Novel check valve and opening check method thereof ) 是由 范利明 刘奇 范震宇 王继圣 于 2019-11-18 设计创作，主要内容包括：一种新式止回阀及其开启止回方法,包括阀体、阀杆和叶片,所述阀杆和叶片都安装在阀体内,所述叶片与阀杆连接固定,所述阀杆的两端与阀体转动连接,所述叶片设计为悬挂式上轻下重的不对称结构,所述叶片的这种上轻下重不对称结构使叶片在阀体内自然状态时成一定角度倾斜。在液体流量压强很小的情况下仍能开启阀门,液体流畅通过,而在液体流量逆流时能迅速关闭阀门；同时避免了因液体流量压强不稳而导致阀板不间断撞击阀体,发出异响噪声污染,损坏阀板和阀体。本发明结构简单、体积较小,开闭流畅,提高和改善了止回阀的技术性能。(The novel check valve comprises a valve body, a valve rod and a blade, wherein the valve rod and the blade are arranged in the valve body, the blade is fixedly connected with the valve rod, two ends of the valve rod are rotatably connected with the valve body, the blade is designed into a suspension type asymmetric structure with a top light and a bottom heavy, and the blade is inclined at a certain angle in a natural state in the valve body due to the top light and bottom heavy asymmetric structure of the blade. The valve can be opened under the condition of small liquid flow pressure intensity, liquid can smoothly pass through the valve, and the valve can be quickly closed when the liquid flow is in reverse flow; meanwhile, the valve plate is prevented from continuously impacting the valve body due to unstable liquid flow pressure, abnormal noise pollution is caused, and the valve plate and the valve body are damaged. The invention has simple structure, small volume and smooth opening and closing, and improves the technical performance of the check valve.)

1. A novel check valve characterized by: the valve rod and the blades are arranged in the valve body, the blades are fixedly connected with the valve rod, two ends of the valve rod are rotatably connected with the valve body, the blades are designed into a suspension type top-light-bottom-heavy asymmetric structure, and the blades are inclined at a certain angle in a natural state in the valve body due to the top-light-bottom-heavy asymmetric structure of the blades.

2. The new check valve as claimed in claim 1, wherein: the asymmetric structure of the blade with the light upper part and the heavy lower part comprises a small semicircular arc sector at the upper part of the blade and a large semicircular arc sector at the lower part of the blade, and the small semicircular arc sector and the large semicircular arc sector are integrally formed; the small half arc sector at the upper part of the blade and the large half arc sector at the lower part of the blade are respectively positioned above and below the valve rod.

3. The new check valve as claimed in claim 2, wherein: the majority of the arc sector at the lower part of the blade upwards passes through the central line of the valve rod by 10-20 mm.

4. The new check valve as claimed in claim 2, wherein: and the upper part of the inner wall of the valve body and the lower part of the inner wall of the valve body are respectively provided with a small arc strip-shaped upper stop block and a large arc strip-shaped lower stop block which are correspondingly matched with the small semi-arc sector edge of the upper part of the blade and the large semi-arc sector edge of the lower part of the blade to block the sealing.

5. The new check valve as claimed in claim 1, wherein: the valve rod is horizontally arranged in the valve body through the center of the valve body, and two ends of the valve rod are respectively connected with the valve body in a rotating mode.

6. The new check valve as claimed in claim 1, wherein: the valve body is provided with a valve body center through hole connected with one end of the valve rod and a valve body center bottom hole connected with the other end of the valve rod.

7. The new check valve as claimed in claim 7, wherein: the valve comprises a valve body, a valve rod, a plug, a steel ball, a valve rod and a valve body, wherein the valve rod is arranged in a central bottom hole of the valve body, penetrates through the central through hole of the valve body, one end of the valve rod is sleeved in the central bottom hole of the valve body and is connected with the steel ball, and the other end of the valve rod is axially positioned in the central through hole.

8. The new check valve as claimed in claim 1, wherein: the blade forms an included angle of 60 degrees +/-5 degrees with the horizontal plane in an original state.

9. A method of opening a check valve using the new check valve as claimed in any one of claims 1 to 10, wherein: the blades are designed into an asymmetric structure with a light upper part and a heavy lower part, the blades are connected and fixed on the valve rod, the valve rod is horizontally installed through the central line of the valve rod, two ends of the valve body are rotatably connected with the valve body, the blades form an included angle of 60 degrees +/-5 degrees with the horizontal plane in an original state, the blades can still be opened smoothly when the liquid flow pressure is small, the blades rapidly return to be sealed and closed with an upper stop block and a lower stop block arranged on the inner wall of the valve body when the fluid flow pressure is reversed, and the check valve is closed.

The technical field is as follows:

the invention relates to an automatic valve, in particular to a novel check valve especially applied to a transformer and an opening check method thereof.

Background art:

the check valve is a valve with a circular valve clack and acts by self weight and medium pressure to block the medium from flowing backwards. The check valve is also called as a check valve, a one-way valve or a check valve and is used for preventing media in a pipeline from flowing backwards. The opening and closing piece automatically opens and closes the valve by the force of medium flowing to prevent the medium from flowing backwards, is mainly used on a pipeline with unidirectional medium flowing, is suitable for cleaning the medium, and is not suitable for the medium containing solid particles and with larger viscosity.

The check valve for the existing transformer is in a closed state when no liquid flows and is opened by liquid pressure, and the volume and weight of the valve plate are increased along with the increase of the caliber of the check valve for the existing transformer, so that the valve plate cannot be opened when the liquid flow is small, and the condition that the valve plate continuously impacts the valve body to generate abnormal sound due to unstable liquid flow pressure also exists.

The invention content is as follows:

the technical problem to be solved by the invention is as follows: the novel check valve and the opening non-return method thereof have the advantages that the problems in the prior art are solved, the novel check valve is simple in structure, small in size and smooth in opening and closing, the effects of normally opening the valve when the liquid flow is small, enabling the liquid to flow smoothly and preventing the valve plate from continuously colliding with the valve body when the liquid flow pressure is unstable are guaranteed.

The technical scheme adopted by the invention is as follows:

the novel check valve comprises a valve body, a valve rod and blades, wherein the valve rod and the blades are installed in the valve body, the blades are fixedly connected with the valve rod, two ends of the valve rod are rotatably connected with the valve body, the blades are designed into a suspension type top-light-bottom-heavy asymmetric structure, and the top-light-bottom-heavy asymmetric structure of the blades enables the blades to incline at a certain angle in a natural state in the valve body. The valve can be opened under the condition of small liquid flow pressure, liquid smoothly passes through the check valve, and the valve can be closed quickly when the liquid flow is in reverse flow; meanwhile, abnormal sound and damage to the valve plate and the valve body caused by the fact that the valve plate continuously impacts the valve body due to unstable liquid flow pressure are avoided.

In the above technical scheme, the asymmetric structure of the blade with the light upper part and the heavy lower part comprises a small half arc sector at the upper part of the blade and a large half arc sector at the lower part of the blade, and the blade are integrally formed.

In the above technical scheme, the small half arc sector at the upper part of the blade and the large half arc sector at the lower part of the blade are respectively positioned above and below the valve rod.

In the technical scheme, the majority of the arc sector at the lower part of the blade upwards crosses the central line of the valve rod by 10-20 mm.

In the technical scheme, the upper part of the inner wall of the valve body and the lower part of the inner wall of the valve body are respectively provided with a small arc strip-shaped upper stop block and a large arc strip-shaped lower stop block which are correspondingly matched with the small arc sector edge at the upper part of the blade and the large arc sector edge at the lower part of the blade to block the sealing.

In the technical scheme, the valve rod is horizontally arranged in the valve body through the center of the valve body, and two ends of the valve rod are respectively connected with the valve body in a rotating mode.

In the technical scheme, the valve body is provided with a valve body center through hole connected with one end of the valve rod and a valve body center bottom hole connected with the other end of the valve rod.

According to the technical scheme, the steel balls are placed in the central bottom hole of the valve body, the valve rod penetrates through the central through hole of the valve body, one end of the valve rod is sleeved into the central bottom hole of the valve body and is connected with the steel balls, and the other end of the valve rod is axially positioned in the central through hole of the valve body through a plug and a thread.

In the above technical scheme, the blade is a valve plate with a sheet structure, and the blade and the valve rod are connected and fixed through a countersunk head screw.

In the technical scheme, the blade and the horizontal plane form an included angle of 60 +/-5 degrees in an original state.

The novel opening check method of the check valve comprises the steps that the blades are designed into an asymmetric structure with a light upper part and a heavy lower part, the blades are connected and fixed on the valve rod, the valve rod is horizontally arranged through the center line of the valve body, two ends of the valve rod are rotatably connected with the valve body, the blades form an included angle of 60 degrees +/-5 degrees with the horizontal plane in an original state, the blades can still be opened smoothly when the pressure of liquid flow is small, the blades return rapidly when the pressure of fluid flow is reversed, the blades are sealed and closed with the upper baffle and the lower baffle arranged on the inner wall of the valve body, and the.

The invention has the characteristics and effects that:

the invention has the remarkable characteristics that: firstly, the valve rod horizontally passes through the center in the valve body and can be rotatably arranged; secondly, the valve plate, namely the blade, is designed into an asymmetric structure with a light upper part and a heavy lower part and a small upper part and a big lower part; thirdly, fixing the blade on the valve rod, and inclining the blade to about 60 +/-5 degrees from the horizontal in a natural state; and fourthly, a small arc strip-shaped stop block and a large arc-shaped lower stop block which are sealed correspondingly to the upper small semicircular arc sector edge and the lower large semicircular arc sector edge of the blade are respectively arranged on the inner wall of the valve body. Therefore, the invention thoroughly solves the problems that the liquid flow pressure of the existing automatic check valve is small and cannot be opened, and the valve plate continuously impacts the valve body when the flow pressure is unstable. In addition, the check valve has the advantages of simple structure, easiness in processing and manufacturing, convenience in installation, high universality and high applicability, and the technical performance of the check valve is greatly improved.

Description of the drawings:

FIG. 1 is a front view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a front view of the valve body of the present invention;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a top view of the valve body of the present invention;

FIG. 7 is a front view of the valve stem of the present invention;

FIG. 8 is a side view of the valve stem of the present invention;

FIG. 9 is a top view of the valve stem of the present invention;

FIG. 10 is a front view of a blade of the present invention;

FIG. 11 is a side view of a blade of the present invention;

FIG. 12 is a top view of a blade of the present invention;

FIG. 13 is a front view of the bulkhead of the present invention;

FIG. 14 is a right side view of the bulkhead of the invention;

FIG. 15 is a schematic view of the upper baffle of the present invention;

FIG. 16 is a schematic view of the lower stop block structure of the present invention;

FIG. 17 is DN200 new check valve leaf test data (one) of the present invention;

FIG. 18 shows DN200 new check valve vane test data (two) according to the present invention;

FIG. 19 is DN300 new check valve leaf test data (one) of the present invention;

fig. 20 shows DN300 new check valve vane test data (two) of the present invention.

Reference numerals:

the valve comprises a valve body, a valve rod, a blade, a valve body, a valve rod, a valve leaf, a valve body, a valve rod.

The specific implementation mode is as follows:

referring to the attached drawings, the novel check valve comprises a valve body 1, a valve rod 2 and a blade 3, wherein the valve rod 2 and the blade 3 are installed in the valve body 1, the blade 3 is fixedly connected with the valve rod 2, two ends of the valve rod 3 are rotatably connected with the valve body 1, and the blade 3 is designed into a suspension type top-light-bottom-heavy asymmetric structure. The upper-light-lower-heavy asymmetric structure of the blade enables the blade to incline at a certain angle in a natural state in the valve body, the valve can still be opened under the condition of small liquid flow pressure intensity, liquid can smoothly pass through the check valve, and the valve can be quickly closed when the liquid flow flows reversely; meanwhile, the valve plate is prevented from continuously impacting the valve body due to unstable liquid flow pressure, and abnormal sound and damage to the valve body of the valve plate are avoided.

The asymmetric structure of the blade with the light upper part and the heavy lower part is an integral molding structure of a small half arc sector at the upper part of the blade and a large half arc sector at the lower part of the blade. Meanwhile, the small half arc sector at the upper part of the blade and the large plate arc sector at the lower part of the blade are respectively positioned above and below the valve rod. As shown in figure 10, the majority of the arc sector of the lower part of the blade goes upwards 10-20mm beyond the central line of the valve rod.

As shown in fig. 2, 15 and 16, the upper part and the lower part of the inner wall of the valve body are respectively provided with a small arc strip-shaped upper stop and a large arc strip-shaped lower stop which are correspondingly matched with the small arc sector edge at the upper part of the blade and the large arc sector edge at the lower part of the blade to stop the sealing.

As shown in fig. 7, 8 and 9, the valve rod is horizontally arranged in the valve body through the center of the valve body, and two ends of the valve rod are respectively connected with the valve body in a rotating manner.

As shown in fig. 1, 2, 3, 4, 5 and 6, the valve body of the present invention is provided with a valve body center through hole connected to one end of the valve rod and a valve body center bottom hole connected to the other end of the valve rod. The valve comprises a valve body, a valve rod, a plug, a steel ball, a valve rod and a valve body, wherein the valve rod is arranged in a central bottom hole of the valve body, penetrates through the central through hole of the valve body, one end of the valve rod is sleeved in the central bottom hole of the valve body and is connected with the steel ball, and the other end of the valve rod is axially positioned in the central through hole.

The valve plate of the lamellar structure of blade, blade with the valve rod passes through countersunk screw and connects fixedly. The blade forms an included angle of 60 degrees +/-5 degrees with the horizontal plane in an original state.

The invention also provides an opening check method adopting the novel check valve, the blades are designed into an asymmetric structure with a light upper part and a heavy lower part, the blades are connected and fixed on the valve rod, the valve rod is horizontally arranged through the center line of the valve body, two ends of the valve body are rotationally connected with the valve body, the blades form an included angle of 60 degrees +/-5 degrees with the horizontal plane in the original state, the blades can still flow through the valve body when the pressure of liquid flow is small, the blades rapidly return to be sealed and closed with the upper and lower stop blocks arranged on the inner wall of the valve body when the pressure of the liquid flow is reverse, and the check valve is closed.

Referring to fig. 1, 4 and 5, the invention puts a steel ball 10 with proper size into a central bottom hole 9 of a valve body, penetrates a valve rod 2 through a central through hole 8 of the valve body, is inserted into the bottom of the central bottom hole 9 of the valve body and contacts with the steel ball 10, simultaneously screws a plug 11 into the central through hole of the valve body through threaded connection, props the valve rod 2 by a conical end of the plug 11, and finally adjusts the tightness through a straight-line groove of the plug, thereby ensuring the flexibility of the rotation of the valve rod 2.

The blade 3 is in the shape of a big semicircle and a small semicircle, the small circle faces upwards, the big circle faces downwards, and the blade is connected and matched with the valve rod through a countersunk head screw 12. The size of the upper arc and the lower arc of the blade 3 is calculated to obtain a proper size, so that the blade is in an inclined state of about 60 degrees in a natural state. When the blade 3 is close to perpendicularly, correspond upside and the downside of blade 3 and paste tight position, go up dog 6 and lower dog 7 at the inboard welding of valve body, when blade 3 closed, go up, lower dog and blade circular arc part contact play a spacing effect, and the fan-shaped central line of crossing of most circular arcs of blade lower part simultaneously, the circular arc bulge can contact with lower dog when blade 3 opens, also plays a spacing effect. Because the lower half part of the vane has a higher specific gravity than the upper half part of the vane, when oil flows forward, the vane 3 is pushed to rotate around the shaft anticlockwise as shown in the side view of fig. 2, oil flows are allowed to pass, and when oil flows back, the vane 3 is pushed to rotate around the shaft clockwise as shown in the side view of fig. 2, and is contacted and closed with the upper stop block and the lower stop block, so that the check effect is achieved.

The small semi-circular arc sector at the upper part of the blade and the large semi-circular arc sector at the lower part of the blade calculate the weight according to the material density and the volume of the blade to realize the suspended static inclination of the blade. To this end, the present invention has conducted a number of experiments, including experiments as shown in FIGS. 17-20.