CN218845213U - Novel check valve - Google Patents

Abstract

The utility model discloses a novel check valve, which comprises a valve body, a transverse flow channel is opened in the valve body, a cantilever is fixed in the valve body, a bracket is fixed on the cantilever through fasteners, and a rocker is rotatably connected with the rocker on the bracket. A sealing and damping device is installed on the rocker; a second jack is opened on the rocker, and a second inserting rod inserted into the second jack is fixed on the support plate, and a second inserting rod is fixed on the second inserting rod to prevent the second inserting rod from The limit plate protruded from the second jack, there is a moving gap between the limit plate and the support plate; the first inclined pressure surface vertically along the counterclockwise angle is arranged on the horizontal flow channel, and the first inclined pressure surface is fixed with A hard-sealed metal sealing layer matched with the sealing ring, and a stop blocking block for counterclockwise stop of the rocker is fixed in the valve body. The utility model can overcome the "water hammer" phenomenon generated when the check valve checks, improves the use effect and service life of the check valve, reduces noise and vibration, and is worthy of popularization and application.

Description

New check valve

technical field

The utility model relates to a high-end device, in particular to a valve, especially a new check valve.

Background technique

Check valve refers to a valve whose opening and closing part is a circular disc and acts to block the reverse flow of the medium by its own weight and medium pressure; it belongs to the automatic valve category, also known as check valve, one-way valve, return valve or Isolation valve; the disc movement mode is divided into lifting type and swing type; the problem encountered by the current swing check valve is that when the pressure on the flow side of the medium suddenly disappears, the reverse side of the medium will suddenly flow back, which will affect the valve. The valve disc will be violently hit, and then the valve disc will violently hit the sealing layer, which will cause water hammer to occur, not only the vibration is large, but also the valve disc is easy to break, requiring frequent maintenance and overhaul.

Chinese utility model patent CN 206682368 U discloses a swing check valve, the swing check valve includes a swing check valve body, a valve cover is arranged above the swing check valve body, and The two sides of the swing check valve body are provided with flange interfaces, and the inside of the swing check valve body is provided with a medium channel. A rocker is installed on the shaft, a disc is installed on one side of the rocker, and a middle head gasket is installed on one side of the disc; when the pressure of the medium flow side suddenly disappears, the reverse side of the medium will suddenly flow back. , so that the valve clack turns over under the gravity, and then the valve clack is pushed by the medium with high pressure, so that the valve clack hits the sealing surface heavily, so that the swing check valve has a water hammer phenomenon, and the vibration is large. Swing check valves are easily damaged, require frequent maintenance, and greatly increase costs.

Utility model content

The utility model aims to solve the above-mentioned shortcomings of the prior art, and provides a new type of check valve with cushioning when the valve flap hits the sealing surface when the medium flows backwards, and no water hammer phenomenon occurs, which satisfies the user's requirements for the swing check valve. Low vibration, low noise, and low maintenance costs are required during use.

The utility model adopts the technical solution to solve the technical problems: this new check valve includes a valve body, a transverse flow channel is opened in the valve body, a cantilever is fixed in the valve body, a bracket is fixed on the cantilever through a fastener, and the bracket rotates A rocker is connected to the rocker, and a sealing and damping device is installed on the rocker; the sealing and damping device includes a valve braid, a sealing ring is installed on the valve braid, a support plate is provided outside the valve braid, and a set of The shock absorber is evenly distributed along the center of the valve braid. The shock absorber includes a horizontal block fixed on the support plate. The first insert rod is fixed on the horizontal block. Jack, the first inserting rod is plugged into the first jack, the end of the first inserting rod is fixed with a limit block whose cross-section is larger than the first inserting rod, and there is a socket between the horizontal block and the inserting block. The compression spring on the plunger; the rocker is provided with a second jack, the support plate is fixed with a second plunger inserted into the second jack, and the second plunger is fixed to prevent the second plunger from moving from the second plunger. The limit plate protruded from the second socket, there is a moving gap between the limit plate and the support plate; the first inclined pressure surface vertically along the counterclockwise angle is arranged on the horizontal flow channel, and the first inclined pressure surface is fixed with the The hard-sealed metal sealing layer matched with the sealing ring, and the stop blocking block for the counterclockwise stop of the rocker is fixed in the valve body. The role of the valve body, transverse flow channel, cantilever, bracket, rocker, and sealing and damping device here is to perform check operation on the pipeline, and in the process of check, there will be no water hammer phenomenon, which protects the sealing ring. The effect is good, and it has good anti-vibration, anti-loosening and anti-damage effects on the check valve as a whole; Large and acts on the support plate, at this time, the pressure of the support plate will be transmitted to the valve disc through the damping effect of the compression spring, thus avoiding the occurrence of "water hammer" phenomenon, and also avoiding the occurrence of severe vibration and sound; Hammer refers to the phenomenon of large pressure fluctuations and vibrations caused by rapid changes in fluid flow in a closed pipeline system (including pumps); it is also called "water hammer"; its instantaneous pressure can greatly exceed normal pressure, and often produce destructive effects; here, the hard-sealed metal sealing layer cooperates with the sealing ring to make the non-return effect better, and there is no leakage gap; here, the hard-sealed metal sealing layer is made of cobalt-based alloy material or other similar performance materials. High or low temperature, and wear-resistant, can greatly increase the service life of the check valve.

For further improvement, the valve body is provided with a longitudinal channel communicating with the transverse flow channel, and the top of the longitudinal channel is sealed with a valve cover fastened by fasteners. Here, the function of the longitudinal channel and the bonnet is to facilitate the disassembly of the bonnet to install and maintain the disc, support plate and other components of the check valve.

Further improvement, the first socket is provided with a first self-lubricating layer made of tin bronze material; the second socket is provided with a second self-lubricating layer made of tin bronze material. The role of the first self-lubricating layer and the second self-lubricating layer here is to greatly reduce the frictional force, so that the resistance of the first insertion rod is small when it moves at the first insertion hole, so that the second insertion rod moves in the second insertion hole. The resistance is small when moving at the socket, and the operation is more reliable and stable.

Further improvement, the outer side of the support plate is a second inclined pressure surface at a vertical counterclockwise angle, and the angle of the second inclined pressure surface is greater than the angle of the first inclined pressure surface. Here, the function of the second inclined pressure surface is to enable the fluid medium to press against the support plate and provide the pressure force component, so that the valve disc is pressed more tightly on the hard-sealed metal sealing layer, and the non-return effect is better to avoid leakage; Here, the angle of the second inclined pressure surface is greater than the angle of the first inclined pressure surface, which can provide a larger component force to make the support plate press against the compression spring, thereby using the compression spring force of the compression spring to press the valve disc, thereby Provide greater component force to press the valve disc against the hard-sealed metal sealing layer.

Further improvement, the inner side of the valve braid is provided with a groove opening. The function of the notch here is to increase the impact force of the fluid medium on the disc, thereby making the check valve more sensitive.

Further improvement, the sealing ring is fastened to the disc by hexagon socket head screws. The function of the hexagon socket head screw here is to make the sealing ring more firmly fixed on the valve disc, and avoid being washed out from the valve disc by the fluid medium.

The beneficial effects of the utility model are: the utility model is ingeniously and reasonably designed, and the valve body, the transverse flow channel, the cantilever, the support, the rocker, and the sealing vibration damping device can be used to perform check operation on the pipeline, and in the process of check , there will be no water hammer phenomenon, good protection effect on the sealing ring, good anti-vibration, anti-loosening and anti-damage effects on the whole check valve, and the use of the sealing vibration-damping device makes the pressure on the inflow side of the fluid medium suddenly become zero. , The pressure on the opposite side of the fluid medium increases sharply and acts on the support plate. At this time, the pressure of the support plate will be transmitted to the valve disc through the damping effect of the compression spring, thus avoiding the occurrence of "water hammer" phenomenon, and also Vigorous vibration and sound can be avoided, and the utility model can overcome the "water hammer" phenomenon generated when the check valve checks, improves the use effect and service life of the check valve, reduces noise and vibration, and is worthy of popularization and application.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of disc area in the utility model;

Fig. 3 is a partially enlarged view of area A of Fig. 1;

Fig. 4 is the structural representation when the disc is washed away by the medium in the utility model;

Fig. 5 is a force diagram of the reverse medium on the valve disc and the supporting plate when the valve disc of the utility model is closed;

Fig. 6 is a flow chart of vibration reduction of the valve clack and the support plate in the utility model.

Explanation of reference numerals: valve body 1, transverse channel 1-1, first inclined pressure surface 1-1a, cantilever 1-2, longitudinal channel 1-3, bracket 2, rocker 3, second socket 3-1 , the second self-lubricating layer 3-1a, the sealing and damping device 4, the valve braid 4-1, the groove opening 4-1a, the sealing ring 4-2, the support plate 4-3, the second inclined pressure surface 4-3a, Damper 4-4, horizontal block 4-4a, first insert rod 4-4b, limit block 4a-4b, insert block 4-4c, first socket 4a-4c, first self-lubricating layer 4ab-4c , Compression spring 4-4d, second plunger 5, limit plate 5-1, moving gap 6, hard-sealed metal seal layer 7, stop blocking block 8, valve cover 9, hexagon socket head cap screw 10.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", Orientation indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operation, and therefore cannot be construed as a limitation of the utility model.

Referring to the accompanying drawings: This new type of check valve includes a valve body 1, a transverse flow channel 1-1 is opened in the valve body 1, a cantilever 1-2 is fixed in the valve body 1, and the cantilever 1-2 is fixed by a fastener There is a bracket 2, a rocker 3 is connected to the bracket 2 for rotation, and a sealing and damping device 4 is installed on the rocker 3; the sealing and damping device 4 includes a valve braid 4-1, and a sealing ring 4-1 is installed on the valve braid 4-1. 2. There is a support plate 4-3 on the outside of the valve braid 4-1, and a set of shock absorbers 4-4 evenly distributed along the center of the valve braid 4-1 is arranged between the valve braid 4-1 and the support plate 4-3 , the shock absorber 4-4 includes a horizontal block 4-4a fixed on the support plate 4-3, the first inserting rod 4-4b is fixed on the horizontal block 4-4a, and the inserting block 4 is fixed on the valve braid 4-1 -4c, there are first jacks 4a-4c on the insert block 4-4c, the first inserting rod 4-4b is plugged into the first jacking hole 4a-4c, and the end of the first inserting rod 4-4b is fixed with The limit block 4a-4b whose cross-section is larger than the first insertion rod 4-4b is provided with a compression spring 4-4d sleeved on the first insertion rod 4-4b between the horizontal block 4-4a and the insertion block 4-4c; The rocking bar 3 is provided with a second jack 3-1, and the support plate 4-3 is fixed with a second inserting rod 5 inserted in the second jack 3-1, and the second inserting rod 5 is fixed with a second inserting rod 5 to prevent the second The limit plate 5-1 that the two inserting rods 5 deviate from the second jack 3-1, there is a moving gap 6 between the limit plate 5-1 and the support plate 4-3; There is a first inclined pressure surface 1-1a vertically at an anticlockwise angle, on the first inclined pressure surface 1-1a is fixed a hard-sealed metal sealing layer 7 that cooperates with the sealing ring 4-2, and inside the valve body 1 is fixed a The stop blocking block 8 that rocking bar 3 stops counterclockwise.

The valve body 1 is provided with a longitudinal channel 1-3 communicating with the transverse flow channel 1-1, and the top end of the longitudinal channel 1-3 is sealed with a valve cover 9 fastened by fasteners.

A first self-lubricating layer 4ab-4c made of a tin bronze material is provided on the first socket 4a-4c; a second self-lubricating layer made of a tin bronze material is provided on the second socket 3-1 3-1a.

The outer side of the support plate 4-3 is a second inclined pressing surface 4-3a vertically at a counterclockwise angle, and the angle of the second inclined pressing surface 4-3a is larger than the angle of the first inclined pressing surface 1-1a.

The inner surface of the valve braid 4-1 has a groove mouth 4-1a.

The sealing ring 4-2 is fastened at the valve disc 4-1 by the hexagon socket head cap screw 10.

The working principle of the utility model: when the pressure on the flow side of the medium suddenly disappears, the reverse side of the medium will flow back suddenly according to the pressure. The sealing metal sealing layer 7 rotates counterclockwise. When the valve disc 4-1 has not reached the hard sealing metal sealing layer 7, at this time, the reverse side of the medium will press the support plate 4-3 with high pressure, so that the valve disc 4-1 Between the support plate 4-3, through the damping effect of each compression spring 4-4d (as shown in Figure 6), the current water hammer of large vibration can be avoided, and through each vibration damping effect of the compression spring 4-4d, also It can avoid that when the sealing ring 4-2 acts on the hard-sealed metal sealing layer 7, the sealing ring 4-2 will not hit the hard-sealed metal sealing layer 7, so that the service life of the sealing ring 4-2 will be longer and the maintenance cost will be reduced. It will be lower; the utility model can overcome the "water hammer" phenomenon generated when the check valve checks, improves the service life and use effect of the check valve, reduces vibration and noise, and is worthy of popularization and application.

Although the present invention has been illustrated and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made within the scope of the claims.

Claims (6)

1. The utility model provides a new-type check valve, includes valve body (1), it has horizontal runner (1-1), characterized by to open in valve body (1): a cantilever (1-2) is fixed in the valve body (1), a bracket (2) is fixed on the cantilever (1-2) through a fastener, a rocker (3) is rotatably connected on the bracket (2), and a sealing vibration damping device (4) is installed on the rocker (3);

the sealing and damping device (4) comprises a valve braid (4-1), a sealing ring (4-2) is installed on the valve braid (4-1), a supporting plate (4-3) is arranged on the outer side of the valve braid (4-1), a group of damping pieces (4-4) uniformly distributed along the center of the valve braid (4-1) are arranged between the valve braid (4-1) and the supporting plate (4-3), each damping piece (4-4) comprises a transverse block (4-4 a) fixed on the supporting plate (4-3), a first inserting rod (4-4 b) is fixed on each transverse block (4-4 a), an inserting block (4-4 c) is fixed on the valve braid (4-1), a first inserting hole (4 a-4 c) is formed in each inserting block (4-4 c), the first inserting rod (4-4 b) is inserted into the first inserting hole (4 a-4 c), a limiting block (4-4 d) is fixed at the end of each inserting rod (4-4 b) and is larger than a compression limiting block (4-4 d) which is arranged on the corresponding inserting block (4-4 a);

a second jack (3-1) is formed in the rocker (3), a second inserting rod (5) inserted in the second jack (3-1) is fixed on the supporting plate (4-3), a limiting plate (5-1) for preventing the second inserting rod (5) from being separated from the second jack (3-1) is fixed on the second inserting rod (5), and a moving gap (6) is reserved between the limiting plate (5-1) and the supporting plate (4-3);

the horizontal flow channel (1-1) is provided with a vertical first inclined pressure surface (1-1 a) with an anticlockwise angle, a hard sealing metal sealing layer (7) matched with the sealing ring (4-2) is fixed on the first inclined pressure surface (1-1 a), and a stop block (8) for stopping the rocker (3) anticlockwise is fixed in the valve body (1).

2. The new check valve as set forth in claim 1, wherein: the valve body (1) is provided with a longitudinal channel (1-3) communicated with the transverse flow channel (1-1), and the top end of the longitudinal channel (1-3) is sealed with a valve cover (9) fastened through a fastening piece.

3. A door closer according to claim 1, wherein: a first self-lubricating layer (4 ab-4 c) made of tin bronze is arranged on the first insertion holes (4 a-4 c); and a second self-lubricating layer (3-1 a) made of tin bronze material is arranged on the second insertion hole (3-1).

4. The new check valve as set forth in claim 1, wherein: the outer side of the supporting plate (4-3) is a second inclined pressing surface (4-3 a) which is vertical and has an anticlockwise angle, and the angle of the second inclined pressing surface (4-3 a) is larger than that of the first inclined pressing surface (1-1 a).

5. The new check valve as set forth in claim 1, wherein: the inner side surface of the valve braid (4-1) is provided with a notch (4-1 a).

6. The new check valve as set forth in claim 1, wherein: the sealing ring (4-2) is fastened at the valve clack (4-1) through an inner hexagon screw (10).

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