KR100469044B1 - Hydraulic check valve - Google Patents

Abstract

The present invention relates to a hydraulic check valve, the disk is coupled to the shaft portion of the valve body rotatably open and close to the shaft, the weight is fixed to the arm at a predetermined position of the shaft, the inner side of the bracket coupled to one side of the shaft portion At one end of the shaft, the operation arm is coupled via a clutch provided with a transmission part, a hydraulic operation part and a spring operation part to connect and disconnect the power transmission of the operation arm and one axis, and to be pivotable via a hinge part of the bracket. The plunger of the coupled disk opening and closing cylinder is rotatably connected to the lower end of the operating arm by a connecting pin, so that the disk is opened and closed even when the hydraulic pressure is released. Since the hydraulic check valve according to the present invention is hydraulic and yet without hydraulic pressure, the function of the check is achieved, the hydraulic check valve can be opened in any case even when the hydraulic check valve is interlocked with the two pumps so that the pump always opens when the pump is started. There is an advantage in that the equipment can be safely managed at all times and reliability is improved. In addition, since the weight is set to be maintained at a position inclined clockwise in the range of 3 ° to 7 ° with respect to the vertical line in the open position of the disc, head loss is prevented when the valve is closed, and the disc closing operation is smooth. There is an advantage.

Description

Hydraulic Check Valve {HYDRAULIC CHECK VALVE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic check valve, and in particular, a check valve for a drainage pumping station and a discharge valve of a drainage pump, and a check valve having a hydraulic drive device is mechanically driven by a clutch even when the hydraulic pressure is released, that is, without the hydraulic pressure. It is related with the hydraulic check valve which enabled the check valve function.

In general, a check valve for a drain pumping station and a check valve installed on the discharge side of a drain pump and having a hydraulic drive device are coupled to the shaft of the valve body so that the disk can be opened and closed rotationally by the shaft. A disk opening / closing cylinder into which oil is introduced is provided, and the plunger of the cylinder is connected to the other end of the working arm connected to one end of the disk shaft so that the disk of the check valve is opened and closed by the cylinder.

Such check valves and reverse valves are installed on the discharge pump discharge side of the drainage pumping station so that the disc is forcibly opened and closed by the hydraulic action of the cylinder. There was a problem that the disk does not close even if the hydraulic pressure is applied.

The present invention has been made in order to solve the above problems and defects as described above, the check valve for the drain pump station, the check valve provided on the discharge side of the drain pump and having a hydraulic drive device in the state that the hydraulic pressure is released, that is, It is an object of the present invention to provide a hydraulic check valve that is mechanically driven by a clutch to perform a check valve function even when there is no state.

1 to 4 is a view showing a hydraulically actuated check valve according to an embodiment of the present invention,

1 is a longitudinal sectional view of a hydraulically actuated check valve.

2 is a side view of a hydraulically actuated check valve.

3 is a partially enlarged view of FIG. 2;

4 is a partially enlarged view of FIG. 1;

5 is an exploded perspective view of the clutch unit.

6 and 7 are a longitudinal sectional view and a side view of a hydraulically actuated check valve according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: valve body 110, 120: shaft portion

130: Bracket 200: Disc

210: axis 212: intermediate step portion

300: working arm 400: disc opening and closing cylinder

410: Plunger 411: connecting pin

420: hinge portion 500: clutch

510: electric drive 511: slider

512: intermediate detachable portion 513: slip ring

514: support plate 515: key

520: hydraulic actuator 521: cylinder

522: plunger 530: spring operating portion

In order to achieve the above object, the hydraulic check valve according to the present invention has a disk coupled to the shaft portion of the valve body so as to be rotatably opened and closed, and the weight is fixed to the predetermined position of the shaft by one arm portion, At one end of the shaft inside the combined bracket, the operating arm is coupled via a clutch provided with a transmission unit, a hydraulic operation unit and a spring operation unit for connecting and disconnecting the operation arm and power transmission of the one shaft, and hinged to the bracket. The plunger of the disk opening and closing cylinder which is rotatably coupled via the part is rotatably connected to the lower end of the operating arm by a connecting pin, so that the disk is opened and closed even when the hydraulic pressure is released.

The operating arm is configured such that its inner annular fastening portion is fixed to the outer diameter portion of the slip ring of the slider via a key.

Further, when the disc is opened, the position of the weight is configured to be maintained at a position inclined clockwise in a range of 3 ° to 7 ° with respect to the vertical line.

In addition, the disk opening and closing cylinder and the clutch cylinder are configured to be connected to the same hydraulic drive source.

In addition, the inner detachable portion provided in the slider and the power detachable portion of the intermediate step portion provided at the shaft end are preferably formed in a rectangular plane so that the inner and outer diameters are engaged with each other when the power is connected and separated from each other when the power is cut off. In addition, it may be formed in the form of a spline type, a polygon, a shape, and the like.

In addition, the clutch is provided on one end of the shaft and the weight is installed on the other end of the shaft, but the clutch and the weight is installed on one end of the shaft may also be used.

The hydraulic drive source of the hydraulic actuating part provided in the clutch may be separate from the hydraulic drive source of the main cylinder, but it is preferable to operate simultaneously with the hydraulic drive source of the main cylinder to ensure ease of control and operation reliability.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail as follows.

1 to 4 is a view showing a hydraulic drive check valve according to an embodiment of the present invention, Figure 1 is a longitudinal cross-sectional view of the hydraulic drive check valve, Figure 2 is a side view of the hydraulic drive check valve 3 is a partial enlarged view of FIG. 2, a partially enlarged view of FIG. 1, respectively, and FIG. 5 is an exploded perspective view of the clutch unit.

As shown in the drawing, the hydraulically actuated check valve according to the present invention is coupled to the shaft parts 110 and 120 of the valve body 100 so as to be rotatably opened and closed by the shaft 210, The weight 220 is fixed to the arm 221 at a predetermined position of the shaft 210, and rotatably coupled to the bracket 130 coupled to the one side bearing portion 110 via the hinge portion 420. The plunger 410 of the disk opening and closing cylinder 400 is rotatably connected to the lower end of the operating arm 300 coupled to the end of the shaft 210 by a connecting pin 411, the bracket 130 At one end of the inner shaft 210, the operating arm 300 is coupled via a clutch 500 for connecting and disconnecting the power transmission of the operating arm 300 and the one shaft 210 to the disk 200. ) Is configured to open and close even when the hydraulic pressure is released.

The clutch 500 includes a transmission part 510, a hydraulic operation part 520, and a spring operation part 530, and the transmission part 510 of the clutch 500 has one end of the shaft 210 at an intermediate step. A slider 511 is formed to be stepped into three stages to have a portion 212 and a protruding end 211, and a support plate 514 is fixed to an end of the slip ring 513 at an end of the shaft 210. It is coupled so as to be slidably movable by an interval, and the inner detachable portion 512 of the slider 511 and the intermediate step portion 212 of the shaft 210 are formed in a quadrangular surface that meshes with each other.

The working arm 300 has its inner annular fastening portion 310 fixed to an outer diameter portion of the slip ring 513 of the slider 511 via a key 515.

The hydraulic actuator 520 of the clutch 500 has the cylinder 521 fixed to the bracket 130 and pushes the support plate 514 with the plunger 522 of the cylinder 521 to push the slider 511. ) Moves inward so that the intermediate detachable portion 512 of the slider 511 and the intermediate step portion 212 of the shaft 210 are connected.

The spring actuator 530 of the clutch 500 compresses the slider 511 to the outside between the stopper 213 fixed to the outer diameter portion of the shaft 210 and the slip ring 513 of the slider 511. The coil spring 531 is inserted.

The disk opening and closing cylinder 400 and the clutch cylinder 521 preferably open and close at the same time to use the same hydraulic drive source to ensure controllability and reliability.

When the disc 200 is opened, the position of the weight 220 is maintained at a position inclined clockwise in a range of 3 ° to 7 ° with respect to the vertical line to prevent head loss and smooth closing when the valve is closed. desirable.

In addition, in the above-described embodiment, the weight 220 is applied in a configuration installed at one end of the shaft 210 like the clutch 500.

Referring to the operation of the hydraulic check valve according to the present invention as described above are as follows.

As described above, the hydraulically actuated check valve according to the present invention is constructed and used, for example, on the discharge side of the drain pipe of the drainage pumping station. When the hydraulic pressure of the hydraulic drive source flows into the cylinder 521 of the clutch 500, the cylinder ( The plunger 522 of the 521 pushes the support plate 514 of the slider 511 so that the slider 511 is moved inward, and accordingly, the intermediate detachment portion 512 of the slider 511 and the intermediate step portion of the shaft 210 are moved. (212) is engaged.

Then, when the hydraulic pressure is applied to the disk opening and closing cylinder 400 in a state in which the clutch 500 is engaged in this way, the operating arm 300 rotates while the plunger 410 of the disk opening and closing cylinder 400 is rotated and the operating arm ( The disc 200 is closed while the shaft 210 connected to the clutch 300 is rotated.

On the other hand, when the hydraulic pressure of the hydraulic drive source is released due to a failure or a power failure of the hydraulic line, the plunger 522 of the cylinder 521 does not push the support plate 514 of the slider 511. In this case, the slider 511 is The intermediate detachable portion 512 of the slider 511 and the intermediate step portion 212 of the shaft 210 are separated from each other by being moved outward by the elasticity of the compression coil spring 531.

In addition, in the state where the clutch 500 is separated as described above, when the reverse water pressure is applied to the drainage pipe, the disc 200 is closed by the reverse water pressure and the weight of the weight 220 even without the hydraulic pressure.

6 and 7 illustrate a longitudinal sectional view and a side view of a hydraulically actuated check valve according to another embodiment of the present invention. In one embodiment, the weight 220 and the clutch 500 have one end of the shaft 210. It is configured to be installed together, but in another embodiment shown in this example, the clutch 500 is installed at one end of the shaft 210 and the weight 220 is installed at the other end of the shaft 210. Other configurations and operations are the same as in one embodiment.

As described above, the hydraulic check valve is coupled to the shaft end of the hydraulic check valve via a clutch provided with a transmission part, a hydraulic operation part, and a spring operation part to connect and disconnect the operation arm and power transmission of the shaft. When the hydraulic fluid flows into the disk opening and closing cylinder and the clutch cylinder, the disk is closed by the hydraulic pressure.When the hydraulic pressure is released due to a breakdown of the hydraulic line or a power failure, the back pressure and the weight of the weight may be used without the hydraulic pressure. It is to be closed by, ie the hydraulic and non-hydraulic function of the check is achieved, so that the hydraulic check valve can be opened in any case in conjunction with the two pumps, so that the pump is always open when the pump is started Benefits that can always be safely managed and increase reliability There is this. In addition, since the weight is set to be maintained at a position inclined clockwise in the range of 3 ° to 7 ° with respect to the vertical line in the open position of the disc, head loss is prevented when the valve is closed, and the disc closing operation is smooth. There is an advantage.

Claims (9)

The disk 200 is rotatably coupled to both shafts 110 and 120 of the valve body 100 in a rotatable manner with the shaft 210, and the weight 220 is armed at a predetermined position of the shaft 210. The plunger 410 of the disk opening and closing cylinder 400, which is fixed to 221 and is rotatably coupled via the hinge portion 420 to the bracket 130 coupled to the one side bearing portion 110, is Is connected to the lower end of the operation arm 300 is coupled to the end of the shaft 210 by a connecting pin 411 rotatably, one end of the shaft 210 inside the bracket 130, the operation arm 300 It is coupled via the clutch 500 for connecting and blocking the power transmission of the operating arm 300 and the one side shaft 210, characterized in that the disk 200 is configured to open and close the operation even when the hydraulic release. Hydraulic check valve. The method of claim 1, wherein the clutch 500 is installed at one end of the shaft 210 of the disk 200, and the weight 220 is installed at the other end of the shaft 210, characterized in that configured Hydraulic check valve. The hydraulic check valve according to claim 1, wherein the clutch (500) and the weight (220) are installed at one end of the shaft (210) of the disc (200). According to claim 1, The transmission part 510 of the clutch 500 is formed to be stepped in three steps so that one end of the shaft 210 has an intermediate step portion 212 and the protruding end 211, the shaft At the end of the slider 210, the slider 511 formed by fixing the support plate 514 at the end of the slip ring 513 is slidably coupled by a predetermined interval, and the intermediate detachable portion 512 of the slider 511 is slidably moved. Inner and outer surfaces of the intermediate step portion 212 of the shaft 210 is a hydraulic check valve, characterized in that formed in the form of a rectangular surface engaged with each other. The hydraulic actuator 520 of the clutch 500 has a cylinder 521 fixed to the bracket 130 so that the plunger 522 of the cylinder 521 has the support plate 514. The hydraulic check valve, characterized in that configured to move the slider (511) to the inside by pushing. The slider of claim 4, wherein the spring operating portion 530 of the clutch 500 is disposed between the stopper 213 fixed to the outer diameter portion of the shaft 210 and the slip ring 513 of the slider 511. Hydraulic check valve, characterized in that the compression coil spring 531 is inserted into the 511 to the outside. The method of claim 4, wherein the operating arm 300 is characterized in that the inner annular fastening portion 310 of the slider 511 is fixed to the outer diameter portion of the slip ring 513 via the key 515 fixed. Hydraulic check valve. 5. The hydraulic check valve of claim 4, wherein the disk opening and closing cylinder (400) and the clutch cylinder (521) are connected to the same hydraulic drive source. 9. The apparatus of claim 1, wherein the position of the weight 220 when the disc 200 is opened is maintained at a position inclined clockwise in a range of 3 ° to 7 ° with respect to the vertical line. Hydraulic check valve characterized in that the configuration is set to.