KR200352379Y1 - A check valve - Google Patents

Abstract

The present invention reduces the impact between the valve body and the valve seat, prevents the valve body and the auxiliary valve body from colliding, and prevents the sealing member and the valve body from being damaged by the impact, thereby improving durability and improving the durability. It relates to a prevention valve.

According to the present invention, a predetermined flow path 112 is formed therein, and a valve body 110 provided with a valve seat 114 at a circumference of the flow path 112 and the valve body 110 horizontally. Rotating shaft 120 is installed to extend through and protrude to the outside, and the slide shaft is coupled to the rotary shaft 120 to be rotated up and down to open and close the flow path 112, the valve body 130 is formed through the port 132 in the center portion And a weight weight 170 connected to one end of the rotary shaft 120 and a damper 180 connected to the rotary shaft 120, wherein the port of the valve body 130 is provided. (132) a pair of guide members 140 provided on both sides side by side, the auxiliary valve body 150 slidably coupled to the guide member 140 to open and close the port 132, and the rotating shaft An arm 190 protruding radially in the center of the 120, the tip of the arm 19, Back flow characterized in that it comprises a connecting link 160 for connecting the coarse valve body 150 to each other so that the auxiliary valve body 150 slides along the guide member 140 as the arm 190 rotates. Preventive valves are provided.

Description

Back check valve {A check valve}

The present invention relates to a non-return valve, and more particularly, to prevent the valve body from closing rapidly to reduce the impact with the valve seat, while preventing the collision between the valve body and the auxiliary valve body, the sealing member and the valve body by the impact The present invention relates to a non-return valve having a new structure to prevent damage to the back and to improve durability.

In general, in a pipeline that transfers fluid, especially a pipeline having a large head difference in front and rear of the pipeline due to a high level difference in the installation path, such as a water supply, when the pump stops due to a power failure, the conveyed fluid may flow backward and the pump may be damaged. In order to prevent this, a non-return valve may be installed at a predetermined position of the pipeline.

1 and 2 illustrate an example of a dashpot type non-return valve configured to prevent the valve from being rapidly closed among the non-return valves. Referring to this, the non-return valve has a predetermined flow path 12 therein. Is formed and the periphery of the flow passage 12 is provided with a valve body 10 provided with a valve seat 14, and is horizontally installed at one side of the valve seat 12, and one end thereof is disposed outward of the valve body 10. When the pumping pressure is applied to the conduit rotatably coupled to the extended rotating shaft 20 and the rotating shaft 20, the flow is automatically separated from the valve seat 14 by the flowing fluid to open the flow path 12, and the pumping pressure is increased. When the fluid is released and does not flow, the valve body 14 is automatically closed due to its own weight to close the flow path 12. The valve body 30 is formed through the port 32 through the center portion thereof, and is fixed to the rotary shaft 20. Open the port 32 according to the installed and Which consists of the auxiliary valve body 50.

At this time, the weight 70 is connected to the rotary shaft 20 extending outwardly of the valve body 10 to be integrally rotated with the auxiliary valve body 50, by the weight 70 to the rotary shaft 20 It is configured to maintain the watertightness of the port 32 by forcibly rotating the auxiliary valve body 50 to be rotated integrally with the bottom) to close the port 32 as well as pressurized closely to the valve body 30. In addition, a damper 80 made of a cylinder or the like is connected to the rotary shaft 20 so that the auxiliary valve body 50 is gradually closed by the damper 80.

Accordingly, the non-return valve may rotate the valve body 30 and the auxiliary valve body 50 by the fluid flowing in the normal state to open the valve, and in case of an emergency such as a power failure, the valve body 30 first rotates downward by its own weight. The flow path 12 is closed, and the auxiliary valve body 50 is then closed by the damper 80 gradually.

However, such a non-return valve has a sealing member provided in the valve seat 14 or the valve body 30 because the heavy valve body 30 is rapidly rotated downward and collides with the valve seat 14 in an emergency such as a power failure. There is a problem that is easily damaged by the impact. In addition, the valve body 30 is collided with the valve seat 14 as it is rapidly rotated downward by its own weight, and is then rotated upward by the repulsive force to collide with the auxiliary valve body 50 which is subsequently closed. There are problems such as damage to the valve bodies 30 and 50 due to the impact.

The present invention is to solve the above problems, an object of the present invention is to connect the valve body to the auxiliary valve body to prevent the valve body from closing rapidly, while sliding the auxiliary valve body on one side of the valve body valve body It is to provide a non-return valve of a new structure to close the port formed in the to prevent collision between the valve body and the auxiliary valve body to prevent damage to the valve or the sealing member by the collision.

1 is a front view showing an example of a conventional non-return valve

2 is a side cross-sectional view of FIG. 1

Figure 3 is a front view showing a non-return valve in accordance with the present invention

4 is a side cross-sectional view of the embodiment

5 is an operating state diagram of the embodiment

<Description of the symbols for the main parts of the drawings>

110. Valve body 120. Rotating shaft

130. Valve body 140. Guide member

150. Auxiliary valve body 160. Link

170.Weight 180.Damper

190. Arm

According to the present invention, a predetermined flow path 112 is formed therein, and a valve body 110 provided with a valve seat 114 at a circumference of the flow path 112 and the valve body 110 horizontally. Rotating shaft 120 is installed to extend through and protrude to the outside, and the slide shaft is coupled to the rotary shaft 120 to be rotated up and down to open and close the flow path 112, the valve body 130 is formed through the port 132 in the center portion And a weight weight 170 connected to one end of the rotary shaft 120 and a damper 180 connected to the rotary shaft 120, wherein the port of the valve body 130 is provided. (132) a pair of guide members 140 provided on both sides side by side, the auxiliary valve body 150 slidably coupled to the guide member 140 to open and close the port 132, and the rotating shaft An arm 190 protruding radially in the center of the 120, a tip of the arm 190, Back flow characterized in that it comprises a connecting link 160 for connecting the coarse valve body 150 to each other so that the auxiliary valve body 150 slides along the guide member 140 as the arm 190 rotates. Preventive valves are provided.

According to another feature of the present invention, the guide member 140 has a pair of guide holes 142 formed side by side in the longitudinal direction so that the auxiliary valve body 150 is slidable to the guide hole 142 It is coupled to the lower end of the guide hole 142, the inclined portion 144 is inclined downward toward the valve body 130 is formed, the auxiliary valve body 150 along the inclined portion 144 valve body ( 130, there is provided a non-return valve characterized in that the pressure tight contact.

Hereinafter, described with reference to the accompanying drawings, preferred embodiments of the present invention is as follows. 3 to 5 illustrate an example of the dashpot type non-return valve according to the present invention. Referring to this, the non-return valve is provided with a flow path 112 and a downwardly inclined valve seat 114 therein. A valve body 110, a rotating shaft 120 extending horizontally through the valve body 110, and rotatably coupled to the rotating shaft 120, and a valve body having a port 132 penetrated therein. 130 and the weight 170 and the damper 180 connected to the rotary shaft 120 are similar to those of the related art.

The valve body 130 is eccentrically positioned on the rotary shaft 120 and slide-coupled upward and downward. A pair of guide members 140 are vertically installed side by side on both sides of the port 132. The guide member 140 guides the auxiliary valve body 150 to be vertically elevated along the valve body 130, and a pair of guide holes 142 are formed to be parallel to each other along the longitudinal direction. As the auxiliary valve body 130 is elevated along the long hole 142, the port 132 of the valve body 130 is opened and closed.

At this time, the lower end of each guide long hole 142 is formed with an inclined portion 144 inclined downward toward the valve body 130, the auxiliary valve body 150 along the inclined portion (144) valve body ( It is configured to maintain the watertightness of the port 132 by being in close contact with 130.

The auxiliary valve body 150 is slidably coupled to the guide long hole 142 of the guide member 140 to open and close the port 132, so that both sides thereof can be easily slid from the guide long hole 142. Roller is provided. The auxiliary valve body 150 is connected to the tip of the arm 190 in the center of the rotating shaft 120 through a connecting link 160 to be described later is configured to slide.

The link link 160 may include a first link member 162 hinged up and down to the front end of the arm 190 protruding in a radial direction in the center of the rotation shaft 120, the first link member 162 One end of the hinge is coupled to the front end of the hinge coupling portion 163 and the other end is composed of a second link member 164 hinged to the auxiliary valve body 150 to be rotatable.

4 and 5, the operation of the non-return valve according to the present invention will be described. When the pumping pressure is applied to the pipeline, the valve body 130 is the pressure of the fluid. By sliding by sliding about the rotary shaft 120 is rotated upward, the flow path 112 is automatically opened. At this time, the auxiliary valve body 150 is connected to the rotary shaft 120 which is not to be rotated by the weight 170 through the connecting link 160 to push up along the guide hole 142 valve body 130 Will open port (132).

That is, as the valve body 130 is rotated upward and opened, the distance between the tip of the arm 190 and the auxiliary valve body 150 is gradually shortened, so that the distance between the first link member 162 and the second link member 164 is reduced. The angle is reduced, in this case, the first link member 162 is connected to the rotating shaft 120 is provided with a weight (170) is to maintain the pivoted state, while the second link member 164 Since the second link member 164 is connected to the auxiliary valve body 150 which is installed on one surface of the valve body 130 and is pushed upward by the valve body 130, the front end of the first link member 162 is provided. While trying to be folded around the auxiliary valve body 150 to be elevated along the guide hole 142 to open the port 132.

When the pumping pressure of the pipe is released, the valve body 130 is automatically rotated downward by its own weight to close the flow path 112, and the auxiliary valve body 150 also guides one surface of the valve body 130. The port 132 of the valve body 130 is closed while descending along the long hole 142.

That is, as the valve body 130 is rotated downward by its own weight, the folded angles of the first link member 162 and the second link member 164 are opened to each other, wherein the first link member 162 Is connected to the rotation shaft 120 is supported by the damper 180 is not to be rotated, so that the valve body 130 is buffered so as not to close rapidly by its own weight. In addition, when the auxiliary valve 150 is gradually lowered along the guide slot 142 to close the port 132, the auxiliary valve body 150 is pressurized to the valve body 130 by the inclined portion 144 of the lower end of the guide slot 142 Since it is in close contact, the water tightness of the port 132 is maintained.

As described above, according to the present invention, the backflow shutoff valve can prevent the valve body 130 from being rapidly closed by its own weight, so that the valve body 130 or the valve seat 114 and the like are not damaged by an impact. Of course, since the auxiliary valve body 150 is opened and closed along the guide member 140 on one surface of the valve body 130 to open and close the port 132, the valve body 130 and the auxiliary valve body ( 150 can be prevented from colliding with each other in the process of closing can greatly improve the durability of the product.

Claims (2)

A predetermined flow path 112 is formed therein, and the valve body 110 having the valve seat 114 is provided at the periphery of the flow path 112 and the valve body 110 horizontally penetrates to protrude outward. An extended rotation shaft 120, the valve body 130 is slidably coupled to the rotation shaft 120 to be rotated up and down to open and close the flow path 112, the port 132 is formed through the central portion thereof, and the rotation shaft 120 In the non-return valve configured to include a weight (170) installed at one end and a damper (180) connected to the rotary shaft (120), parallel to both sides of the port (132) of the valve body (130) A pair of guide members 140 and a subsidiary valve body 150 slidably coupled to the guide member 140 to open and close the port 132, and at the center of the rotating shaft 120. The arm 190 protruding in the radial direction, the tip of the arm 19 and the auxiliary valve body 150 And a connecting link 160 connected to the auxiliary valve body 150 to slide along the guide member 140 in accordance with the rotation of the arm 190. According to claim 1, The guide member 140 has a pair of guide long holes 142 are formed side by side in the longitudinal direction so that the auxiliary valve body 150 is slidably coupled to the guide long holes 142 The lower end of the guide hole 142 is formed with an inclined portion 144 inclined downward toward the valve body 130, and the auxiliary valve body 150 is provided with the valve body 130 along the inclined portion 144. Non-return valve, characterized in that to be in close contact with the pressure.