Rocker arm type quick closing check valve

Abstract

The utility model discloses a rocker arm type quick closing check valve in the technical field of check valves, which comprises a valve body of the check valve, a valve seat is embedded on one side in the valve body, a cavity is arranged on the inner side of the valve body, a valve cover is mounted at the top of the valve body through a plurality of bolt columns, nuts are mounted at the tops of the bolt columns in a threaded manner, and the valve cover is provided with a rocker arm. A check piece used for preventing backflow is installed on the inner side of the valve body, the valve seat is annularly embedded in a cavity of the valve body, the upper surface of the valve deck is in an arc shape, a plurality of bolt columns penetrate through the valve deck, and then nuts are in threaded connection with the bolt columns to install and fix the valve deck. And the non-return piece in the valve body can enable the fluid penetrating through the valve seat to perform anti-backflow non-return operation, so that the anti-backflow efficiency and accuracy are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the check valve field, concretely is a rocker arm formula quick closing check valve. BACKGROUND

[0002] As the core component of the reverse flow protection of the pipeline system, the check valve is widely used in water supply and drainage engineering (high-rise building water supply, municipal pipe network), heating and ventilation system, chemical industry and food and pharmaceutical industry, and its core function is to allow fluid to flow in one direction only and to quickly close the valve port when the fluid flows in reverse to prevent backflow. Fluid backflow not only causes pressure fluctuation of the pipeline system (such as water hammer) and equipment damage (such as water pump impeller reverse rotation), but also may cause medium cross contamination or flow loss. The current mainstream check valve (such as swing type, lifting type and butterfly type check valve) has significant defects in the check valve structure design, resulting in slow opening and closing speed, which cannot meet the needs of the pipeline system for fast response and precise backflow prevention.

[0003] The valve disc of the swing type check valve is hinged in the valve body by a single shaft, and needs to be pushed to rotate around the shaft to open when the fluid flows in the forward direction. Since there is no friction reduction design at the hinge of the valve disc and the valve body, and the valve disc itself is heavy, a large fluid thrust is required to open it, resulting in slow opening speed. When the fluid flows in reverse, the valve disc relies on gravity and reverse flow thrust to reset and close, but the friction resistance at the hinge will delay the closing process, the valve disc will be stuck, and the opening and closing will not be smooth.

[0004] The existing check valve is prone to structural failure due to the core reasons of slow opening and closing (such as large friction, spring attenuation and impurity jamming), and the hinge shaft of the swing type check valve, the spring of the lifting type check valve and the sealing surface of the butterfly type check valve are worn out, corroded and worn out, respectively. Not only does it increase the workload of operation and maintenance, but also it affects the continuous operation of the pipeline system due to frequent shutdown. Therefore, a rocker arm type quick closing check valve is needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a rocker arm type quick closing check valve to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a rocker arm type quick closing check valve, comprising a valve body of a check valve, a valve seat is embedded on one side of the inside of the valve body, a cavity is formed in the inside of the valve body, a valve cover is installed on the top of the valve body through a plurality of bolt columns, a nut is screwed and installed on the top of the bolt column, and a check piece for preventing backflow is installed on the inside of the valve body.

[0007] Preferably, the check element comprises a mounting portion integrally formed on one side of the cavity interior and close to the top, a positioning fork is mounted on the mounting portion by bolts, fixed portions are integrally formed on both sides of the cavity interior, a pin shaft is mounted on the inner side of the fixed portion, and a rocker is hingedly mounted on the outer side of the pin shaft.

[0008] Preferably, the check element further comprises a fixed column penetratingly mounted on one end of the rocker, a valve disc is fixedly connected to one end of the fixed column, the fixed column is screwingly mounted by a nut, and a flat gasket is laid on the outer side of the fixed column and on the side of the nut.

[0009] Preferably, a counterweight is fixedly connected to one end of the rocker, and a blocking portion is integrally formed on the other side of the cavity interior.

[0010] Preferably, a gasket is attached to one side wall of the valve disc.

[0011] Preferably, a sealing portion extends downward from the bottom of the valve cover, and a sealing gasket is attached to the bottom of the sealing portion.

[0012] Preferably, a lifting ring screw is screwingly mounted on the top of the valve cover.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The valve seat is annularly embedded in the cavity of the valve body, the upper surface of the valve cover is arc-shaped, a plurality of bolt columns penetrate the valve cover, the valve cover is then installed and fixed by screwing the nut with the bolt columns, and the check element in the valve body can prevent backflow of the fluid passing through the valve seat, thereby improving the efficiency and accuracy of backflow prevention.

[0015] 2. The top of the mounting portion is used to install and fix the positioning fork by bolts, the cross section of the positioning fork is U-shaped, the pin shaft penetrates the positioning fork and the rocker, and the rocker can rotate around the pin shaft so as to facilitate the fluid to impact the valve disc and the valve seat to be separated to be opened, when the fluid stops flowing, the fluid flows reversely to push the valve disc to tightly adhere to the valve seat, thereby improving the accuracy and practicality of backflow prevention. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic view of the overall structure of the utility model;

[0017] Figure 2 It is a left view of the overall structure of the utility model;

[0018] Figure 3 It is a right view of the overall structure of the utility model; Figure 2 It is an enlarged view of A in the utility model;

[0019] Figure 4 It is an enlarged view of B in the utility model; Figure 2 It is an enlarged view of B in the utility model;

[0020] Figure 5 The structure diagram of the positioning fork, the pin shaft, the rocker, the valve flap, the flat pad, the counterweight block and the gasket in the overall structure of the utility model.

[0021] In the figure: 1, valve body; 2, valve seat; 3, cavity; 4, valve cover; 5, mounting portion; 6, positioning fork; 7, fixed portion; 8, pin shaft; 9, rocker; 10, fixed column; 11, valve flap; 12, flat pad; 13, counterweight block; 14, blocking portion; 15, gasket; 16, sealing portion; 17, sealing gasket; 18, lifting eye bolt. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] Embodiment: please refer to Figures 1-5 The utility model provides a kind of rocker formula quick closing check valve, including the valve body 1 of check valve, valve seat 2 is embedded in one side inside valve body 1, cavity 3 is set up in the inside of valve body 1, valve cover 4 is installed on the top of valve body 1 by multiple bolt columns, nut is screw connected and installed on the top of bolt column, check piece for preventing backflow is installed in the inside of valve body 1, lifting eye bolt 18 is screw connected and installed on the top of valve cover 4.

[0024] It needs to be supplemented that the screwing position of lifting eye bolt 18 on the top of valve body 1 avoids the motion trajectory of internal rocker assembly, to avoid affecting the rotation of rocker and the closing speed of valve flap 11, lifting eye bolt 18 ensures that the tensile force of 1.5 times weight of valve body 11 can be borne, to avoid fracture when lifting, valve seat 2 is annularly embedded in the inside of cavity 3 of valve body 1, the upper surface of valve cover 4 is arc-shaped, multiple bolt columns pass through valve cover 4, then valve cover 4 is installed and fixed by screwing nut and bolt column, check piece in the inside of valve body 1 can prevent backflow check operation to fluid passing through the inside of valve seat 2, to improve the efficiency and accuracy of backflow prevention.

[0025] Specifically, the check element includes an installation portion 5 integrally formed on one side of the cavity 3 inside and close to the top, the installation portion 5 is provided with a positioning fork 6 installed by bolts, both sides of the cavity 3 inside are integrally provided with a fixed portion 7, the inside of the fixed portion 7 is provided with a pin shaft 8, the outside of the pin shaft 8 is hingedly provided with a rocker 9, the check element further includes a fixed column 10 provided at one end of the rocker 9, a valve disc 11 fixedly connected to one end of the fixed column 10, the fixed column 10 is installed by nut screwing, a flat pad 12 is laid on the outside of the fixed column 10 and on the side of the nut, a counterweight 13 is fixedly connected to one end of the rocker 9, and a blocking portion 14 is integrally formed on the other side of the cavity 3 inside.

[0026] Wherein, the installation portion 5 is provided with the positioning fork 6 installed and fixed by bolts on the top, the cross section of the positioning fork 6 is U-shaped, the pin shaft 8 penetrates the positioning fork 6 and the rocker 9, the rocker 9 can rotate around the pin shaft 8, so as to open the valve disc 11 from the valve seat 2 under the impact of the fluid, when the fluid stops flowing, the fluid flows reversely to push the valve disc 11 to tightly adhere to the valve seat 2, thereby improving the accuracy and practicability of the anti-backflow operation.

[0027] In addition, the flat pad 12 on the outside of the fixed column 10 can prevent the nut from rotating reversely and loosening, the counterweight 13 at the end of the rocker 9 can increase the weight of the valve disc 11, so as to avoid that the valve disc 11 is too light to affect the efficiency of the valve disc 11 falling to stop the fluid, the blocking portion 14 on the other side of the cavity 3 inside can block the valve disc 11 through the counterweight 13, so as to prevent the valve disc 11 from moving upward excessively.

[0028] More specifically, a gasket 15 is attached to one side wall of the valve disc 11, the cross section of the gasket 15 is "convex" shape, the gasket 15 on one side of the valve disc 11 tightly adheres to the valve seat 2, thereby increasing the sealing property of the valve seat 2 and the valve disc 11.

[0029] Further, the valve cover 4 is downwardly extended with a sealing portion 16, the sealing portion 16 is attached with a sealing gasket 17 on the bottom, the sealing portion 16 of the valve cover 4 is downwardly embedded into the top of the valve body 1, and the sealing gasket 17 can increase the sealing property between the sealing portion 16 and the valve body 1.

[0030] Working principle: when the fluid flows through the cavity 3, the valve disc 11 is impacted, then the valve disc 11 rotates around the pin shaft 8 in the positioning fork 6 through the rocker 9, the blocking portion 14 blocks and limits the counterweight 13, when the fluid flow rate decreases, the counterweight 13 and the valve disc 11 fall due to gravity, and then the valve disc 11 is impacted by the backflow of the fluid, then the valve disc 11 rotates around the pin shaft 8 through the rocker 9, and then the gasket 15 on one side of the valve disc 11 tightly adheres to one side of the valve seat 2, so as to prevent the fluid from backflowing.

[0031] The contents not described in detail in the present description belong to the prior art known to those skilled in the art.

[0032] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rocker and snap quick closing check valve comprising a valve body (1) of a check valve, characterized in that: The valve body (1) is embedded with a valve seat (2) on one side, a cavity (3) is opened in the valve body (1), a valve cover (4) is installed on the top of the valve body (1) through a plurality of bolt columns, nuts are screwed on the top of the bolt columns, and a check element is installed on the inner side of the valve body (1) to prevent backflow.

2. A rocker and snap quick-acting check valve according to claim 1, characterized in that: The check element comprises an installation part (5) integrally formed on one side of the inner side of the cavity (3) and close to the top, a positioning fork (6) is installed on the installation part (5) through a bolt, fixed parts (7) are integrally formed on both sides of the inner side of the cavity (3), a pin shaft (8) is installed on the inner side of the fixed part (7), and a rocker (9) is hingedly installed on the outer side of the pin shaft (8).

3. A rocker and snap type check valve according to claim 2, characterized in that: The check element further comprises a fixed column (10) penetratingly installed on one end of the rocker (9), a valve clack (11) is fixedly connected to one end of the fixed column (10), the fixed column (10) is screwingly installed on one end through a nut, and a flat gasket (12) is laid on the outer side of the fixed column (10) and on one side of the nut.

4. A rocker and snap type check valve according to claim 3, characterized in that: One end of the rocker (9) is fixedly connected with a counterweight (13), and a blocking part (14) is integrally formed on the other side of the inner side of the cavity (3).

5. A rocker and snap type check valve according to claim 4, characterized in that: A gasket (15) is attached to one side wall of the valve clack (11).

6. A rocker beam quick closing check valve according to claim 3 wherein: A sealing part (16) downwardly extends from the bottom of the valve cover (4), and a sealing gasket (17) is attached to the bottom of the sealing part (16).

7. A rocker-armed quick-closing check valve as defined in claim 2 wherein: A lifting ring screw (18) is screwingly installed on the top of the valve cover (4).

Images