CN223622302U

CN223622302U - A check valve structure suitable for high flow velocities in pipelines

Info

Publication number: CN223622302U
Application number: CN202520049356.8U
Authority: CN
Inventors: 吴鹏; 盛春英; 吴黄俊; 吴云
Original assignee: TONGLING XINTE VALVE CO Ltd
Current assignee: TONGLING XINTE VALVE CO Ltd
Priority date: 2025-01-09
Filing date: 2025-01-09
Publication date: 2025-12-02
Anticipated expiration: 2035-01-09

Abstract

This utility model discloses a check valve structure suitable for high-flow-rate pipelines, including a valve body, valve disc, swing rod, rotary plate, slide rod, and float. The valve body is connected to the pipeline via a connecting flange, and a sealing end face is provided inside the valve body. The swing rod is installed inside the valve body via a rotating shaft, and the end of the swing rod is connected to the valve disc for controlling the unidirectional flow of fluid. The valve disc is tightly fitted with the sealing end face through a second sealing ring to improve sealing performance. An extension shaft is connected to one side of the swing rod, and a rotary plate is installed at the end of the extension shaft. The surface of the rotary plate has a notch. The slide rod can slide vertically in a groove on the extension plate. A locking head is provided at the top of the slide rod, and a float is connected to the bottom of the slide rod. The float moves the slide rod up and down according to the buoyancy generated by the change in the liquid flow rate in the pipeline, thereby controlling the fit between the locking head and the notch of the rotary plate. This device is suitable for high-flow-rate pipeline systems and has the advantages of excellent sealing performance, strong adaptability, convenient operation, and long service life.

Description

Check valve structure suitable for pipeline high flow velocity

Technical Field

The utility model belongs to the technical field of check valves, and particularly relates to a check valve structure suitable for high flow rate of a pipeline.

Background

A check valve is a key component widely used in fluid pipelines and mainly serves to prevent backflow of media so as to protect the equipment and the pipeline from normal operation. Currently, check valves are widely used in petrochemical, water supply and drainage and heating systems, and the stability and adaptability of the operation of the check valves directly affect the efficiency and safety of the whole system.

Prior art check valves typically achieve one-way flow through the opening and closing of the valve flap. However, in high flow rate conduits, the performance of conventional check valves tends to be limited. On the one hand, the high flow rate can cause frequent vibration of the valve clack, increase noise and shorten the service life of the valve, and on the other hand, the structure of part of the check valve cannot adapt to the fluid condition with the ultrahigh flow rate, and the condition of incomplete opening or delayed closing of the valve clack can occur, so that the running efficiency of a pipeline is reduced or the risk of fluid backflow is increased, and meanwhile, the weight of the valve plate can cause resistance to internal fluid.

To solve the above problems, the prior art attempts to improve the adaptability of the check valve by improving the structure of the valve flap or adjusting the design of the sealing means. For example, some designs reduce the impact of vibration on the valve body by providing a damping device on the valve flap, but such improvements fail to address the smooth opening of the valve flap under high flow conditions. In addition, when the flow rate of the pipe is high, the check valve is insufficient to be opened due to excessive fluid resistance, and the flow efficiency of the system is further affected.

Disclosure of utility model

Aiming at the problems existing in the prior art, the utility model aims to provide a check valve structure suitable for a pipeline with high flow rate, which can be realized, can stably operate under the condition of high flow rate, can keep a valve clack in a completely opened state under the condition of high flow rate of the pipeline through reasonable structural design, and can be quickly closed when the flow rate is reduced so as to adapt to the requirements of various working conditions, and improve the performance and reliability of the check valve.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides a check valve structure suitable for pipeline high flow rate, includes the valve body, the valve body both ends are opened, flange is all installed at the valve body both ends, valve body inside water inlet end one side is provided with sealing surface, the inside side top fixed mounting that is close to sealing surface of valve body has the U-shaped support body, the U-shaped support body is open downwards, the inside swivelling mounting of U-shaped support body has the swinging arms, the swinging arms tip is provided with the installation section of thick bamboo, the valve clack is installed through the bolt to the installation section of thick bamboo inboard, the valve clack corresponds each other with sealing surface, swinging arms rotation axis one side is provided with the extension axle, extension axle tip is provided with the carousel, the carousel is arranged in U-shaped support body outside, U-shaped support body one side below is provided with the extension board, the carousel below is arranged in to the extension board.

Further, the gap groove is formed in the surface of the rotary table, the sliding rod is vertically arranged on the surface of the extension plate in a sliding mode, the clamping head is arranged at the top of the sliding rod, the sectional area of the clamping head is larger than that of the sliding rod, and the clamping head is matched with the inner size of the gap groove.

Further, a pontoon is arranged at the bottom of the sliding rod.

Further, an installation vertical cylinder is arranged above the center of the valve body, the installation vertical cylinder is communicated with the inside of the valve body and the top of the installation vertical cylinder is open, a sealing cover is arranged at the top of the installation vertical cylinder through a bolt, and the sealing cover is used for sealing the opening at the top of the installation vertical cylinder.

Further, a second sealing ring is glued on one side surface of the valve clack close to the sealing end surface.

Further, a hanging ring is arranged in the center of the top of the sealing cover, and a first sealing ring is further arranged between the sealing cover and the top opening of the mounting vertical cylinder.

Compared with the prior art, the utility model has the beneficial effects that:

The check valve structure suitable for the high flow rate of the pipeline can adapt to the working condition of the high flow rate of the pipeline by optimizing the structural design in the valve body. The check valve utilizes the cooperation of flotation pontoon and carousel under high velocity of flow condition, ensures that the valve clack can open completely when high velocity of flow, can not move down because of self gravity and produce the resistance to the fluid, avoids traditional check valve to open the problem of not enough because of the flow is too big. Meanwhile, through the precise matching of the valve clack and the sealing end face, the valve clack can quickly return to a closed state when the flow is reduced, fluid backflow is prevented, and the efficient and reliable one-way circulation function is realized.

The device adopts a linkage structure of the pontoon, the sliding rod and the turntable, and the opening state of the valve clack is dynamically adjusted through the buoyancy change of the pontoon. Under the condition of high flow rate, the pontoon floats upwards to drive the slide bar to move upwards, so that the notch groove of the turntable is matched with the clamping head to keep the valve clack completely open, the problem that the valve clack vibrates or is not fully opened under the condition of high flow rate of the traditional check valve is solved, and when the flow rate is reduced, the pontoon loses buoyancy, the slide bar moves downwards to release the limitation of the turntable, so that the valve clack can be quickly closed by virtue of dead weight, and the adaptability and the sealing performance of the check valve are effectively improved.

The valve clack is closely attached to the sealing end face through the addition of the second sealing ring, so that good sealing effect is guaranteed to be achieved in a closed state. The second sealing ring is made of fluororubber material, has good high temperature resistance and wear resistance, improves the sealing capacity of the check valve, prolongs the service life of the valve, and solves the technical problem that the sealing performance of the traditional check valve is reduced under high-frequency use or high-flow-rate impact.

The device adopts the combination of the mounting vertical cylinder and the sealing cover in the valve body design, thereby being convenient for the mounting and maintenance of internal components. The sealing cover simplifies the operation flow through the design of the hanging ring, and meanwhile, the high-efficiency sealing of the top of the vertical cylinder is realized through the first sealing ring, so that the influence of the external environment on the internal structure of the device is avoided. The design improves the maintenance convenience and the use reliability of the check valve, and solves the problem that the traditional check valve is difficult to maintain due to the complex internal structure in high-flow-rate application.

In summary, the device through the innovative structural design not only improves the adaptability and the tightness of the check valve under the condition of high flow velocity, but also obviously improves the operation convenience and the service life, effectively overcomes the defects in the prior art, and provides a solution with reliable performance for a high flow velocity pipeline system.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic view of a valve clack mounting perspective structure of the present utility model;

FIG. 4 is a schematic view of the mounting structure of the turntable and slide bar of the present utility model;

fig. 5 is an enlarged view of the area a of fig. 2 according to the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. Valve body 11, connecting flange 12, mounting vertical cylinder 13, sealing end face 2, sealing cover 21, hanging ring 22, first sealing ring 3, U-shaped frame 31, extension plate 4, swinging rod 41, mounting cylinder 42, extension shaft 43, rotary disk 431, notch groove 5, valve clack 51, second sealing ring 6, sliding rod 61, float bowl 62 and clamping head.

Detailed Description

The present utility model will be specifically described with reference to examples below in order to make the objects and advantages of the present utility model more apparent. It should be understood that the following text is intended to describe only one or more specific embodiments of the utility model and does not limit the scope of the utility model strictly as claimed.

Referring to fig. 1-5, the check valve structure suitable for high flow rate of a pipeline comprises a valve body 1, wherein the valve body 1 is made of stainless steel materials to ensure corrosion resistance, openings at two ends of the valve body 1 are fixedly connected with the pipeline through connecting flanges 11, the connecting flanges 11 are standard type DN100 flanges and are in sealing connection through bolts and sealing gaskets, a sealing end face 13 is arranged on one side, close to a water inlet end, of the interior of the valve body 1, of the sealing end face 13 is subjected to finish machining to ensure seamless fit when the valve body is in sealing contact with a valve clack 5, sealing performance is improved, a U-shaped frame body 3 is fixedly arranged on one side, close to the sealing end face 13, of the upper side of the valve body 1, the U-shaped frame body 3 is made of carbon steel, the interior of the U-shaped frame body 3 is in a structure which is opened downwards, and two sides of the U-shaped frame body 3 are fixed on the inner wall surface of the valve body 1 in a welding mode to ensure mounting stability.

Referring to fig. 1 and 2, a mounting vertical cylinder 12 is arranged above the center of a valve body 1, the mounting vertical cylinder 12 is communicated with the inside of the valve body 1, the top of the mounting vertical cylinder 12 is fixedly connected with a sealing cover 2 through bolts, the sealing cover 2 is made of an aluminum alloy material, a lifting ring 21 is arranged at the top of the sealing cover, the lifting ring 21 is made of carbon steel and is connected with the sealing cover 2 through welding and is used for lifting operation, a first sealing ring 22 is arranged between the sealing cover 2 and the opening at the top of the mounting vertical cylinder 12, the first sealing ring 22 is made of a high-temperature-resistant rubber material, the top of the mounting vertical cylinder 12 can be reliably sealed, the sealing cover 2 compresses between the top of the mounting vertical cylinder 12 and the sealing cover 2 through the compression effect of bolts, and external impurities or fluid are prevented from entering the inside of the mounting vertical cylinder 12.

Referring to fig. 3-5, a swinging rod 4 is installed in the U-shaped frame body 3, two ends of the swinging rod 4 are fixedly connected with two sides of the U-shaped frame body 3 through rotating shafts, the swinging rod 4 is formed by processing high-temperature-resistant stainless steel materials so as to ensure that the swinging rod 4 is not easy to deform when being used in a high-flow-rate medium, an installation cylinder 41 is installed at the end part of the swinging rod 4, a valve clack 5 is fixedly installed in the installation cylinder 41 through bolts, the valve clack 5 is made of corrosion-resistant coated stainless steel, a second sealing ring 51 is glued on one side of the valve clack 5, which is close to a sealing end face 13, the second sealing ring 51 is made of fluororubber, good sealing effect can be provided under the high-flow-rate condition, meanwhile, the high-wear-resistant performance is achieved, an extension shaft 42 extends from one side of the swinging rod 4, the end part of the extension shaft 42 is connected with a rotary disc 43, the surface of the rotary disc 43 is provided with a notch groove 431 through numerical control processing, the width and depth of the notch groove 431 are designed to be matched with a chuck 62 at the top of a slide rod 6, the cross section area of the chuck 62 is larger than 6, and reliable clamping and fixing is achieved through precise size matching between the chuck 62 and the notch groove 431.

Referring to fig. 4 and 5, a pontoon 61 is installed at the bottom of a slide bar 6, the pontoon 61 is made of corrosion-resistant polypropylene material, the outer wall of the pontoon 61 is polished to reduce the resistance of liquid, the pontoon 61 has a diameter of 120 mm and can float upwards flexibly under the buoyancy of the liquid in a pipeline, the slide bar 6 vertically slides through a chute on an extension plate 31, the extension plate 31 is fixed below one side of a U-shaped frame body 3, the extension plate 31 is processed by adopting a steel plate stamping process, the surface of the extension plate 31 is galvanized to prevent corrosion, a clamping head 62 arranged at the top of the slide bar 6 can be precisely matched with a notch groove 431 of a turntable 43 under the buoyancy of the pontoon 61, when the fluid flow rate is reduced, the buoyancy of the pontoon 61 is weakened, the slide bar 6 can slide downwards under the self-weight, and the clamping head 62 is separated from the notch groove 431, so that the turntable 43 can rotate freely.

Through above-mentioned structural design, this device can effectively adapt to the fluidic operating condition of super high velocity of flow in high velocity of flow pipeline, ensures that valve clack 5 possesses good leakproofness and stability when opening and closing, realizes the dynamic adjustment of valve clack 5 through the cooperation of flotation pontoon 61 and carousel 43 simultaneously, avoids vibrations and sealing performance reduction problem because of high velocity of flow causes, is showing the application scope and the life that improve the device.

The utility model has the working principle that the check valve is arranged in a pipeline through the connecting flanges 11 at two ends, the structure in the valve body 1 can be arranged through the opening at the top of the vertical installation cylinder 12, after the installation is finished, the opening of the vertical installation cylinder 12 is sealed through the sealing cover 2 and the first sealing ring 22, the valve body 1 is in a closed state because the dead weight valve clack 5 is vertically downward and seals the sealing end face 13 in a pressing mode, the notch groove 431 is misplaced with the clamping head 62, when a large amount of fluid passes through the pipeline, the valve clack 5 can be punched up, the swinging rod 4 can rotate at an angle, when the internal flow of the pipeline is higher, the valve clack 5 can be driven to rotate at a larger angle through the ultrahigh flow, the valve clack tends to be in a horizontal state, the notch groove 431 can rotate to be downward, the high flow can enable the inside of the vertical installation cylinder 12 to enter liquid, the liquid can drive the pontoon 61 to float upwards, then the clamping head 62 is matched with the corresponding notch groove 431, the valve clack 5 is kept in a maximum open state through the buoyancy of the pontoon 61, the dead weight of the valve clack 5 can not block the high flow rate liquid, so that the high flow rate of the pipeline can be adapted to the high flow rate of the pipeline, when the internal flow of the pipeline is reduced, the floating pontoon is completely, the floating pontoon 61 can be completely lost, and the floating 1 can be completely reduced, and the floating 1 can be completely turned down along with the rotation of the pontoon 43 when the internal flow is completely, and the floating drum is reduced.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims

1. A check valve structure suitable for high flow rates in pipelines, comprising a valve body (1), characterized in that: the valve body (1) is open at both ends, and connecting flanges (11) are installed at both ends of the valve body (1); a sealing end face (13) is provided on the inlet side of the valve body (1); a U-shaped frame (3) is fixedly installed above the side of the valve body (1) near the sealing end face (13); the U-shaped frame (3) is open downwards; and a swing rod (4) is rotatably installed inside the U-shaped frame (3). The rod (4) is provided with an installation cylinder (41) at its end. A valve disc (5) is installed inside the installation cylinder (41) by bolts. The valve disc (5) corresponds to the sealing end face (13). An extension shaft (42) is provided on one side of the rotating shaft of the swing rod (4). A turntable (43) is provided at the end of the extension shaft (42). The turntable (43) is placed outside the U-shaped frame (3). An extension plate (31) is provided below one side of the U-shaped frame (3). The extension plate (31) is placed below the turntable (43).

2. The check valve structure suitable for high flow velocity in pipelines according to claim 1, characterized in that: a notch (431) is provided on the surface of the turntable (43), a slide rod (6) is vertically slidably installed on the surface of the extension plate (31), a clamp (62) is provided on the top of the slide rod (6), the cross-sectional area of the clamp (62) is larger than that of the slide rod (6), and the internal dimensions of the clamp (62) are adapted to the notch (431).

3. The check valve structure suitable for high flow velocity in pipelines according to claim 2, characterized in that: a float (61) is provided at the bottom of the slide rod (6).

4. A check valve structure suitable for high flow rates in pipelines according to claim 1, characterized in that: an installation cylinder (12) is provided above the center of the valve body (1), the installation cylinder (12) is connected to the interior of the valve body (1) and the top is open, and a sealing cover (2) is installed on the top of the installation cylinder (12) by bolts, the sealing cover (2) is used to seal the open top of the installation cylinder (12).

5. A check valve structure suitable for high flow rates in pipelines according to claim 1, characterized in that: a second sealing ring (51) is glued to one side of the valve disc (5) near the sealing end face (13).

6. A check valve structure suitable for high flow rates in pipelines according to claim 4, characterized in that: a lifting ring (21) is installed at the top center of the sealing cover (2), and a first sealing ring (22) is placed between the sealing cover (2) and the top opening of the mounting cylinder (12).