KR20070121904A - Control check valve - Google Patents

Abstract

A control check valve is provided to arbitrarily control the position of a disk since the disk is switched by rotating a warm gear coupled to a valve. A control check valve(100) includes a body part(110), a driving part(120), a counter weight part(130), a damping part(140), and a detecting part(150). The body part is formed to allow a valve shaft(111) to penetrate through a center thereof and has a disk(114) to open and close a fluid way. The driving part has a segment to be connected to the valve shaft and is coupled with a worm wheel. And the driving part includes a handle(125) and a motor(126). The counter weight part is formed so as to be closed by gravity. The damping part has a position control groove and intercepts the valve by closing the disk. The damping part controls closing speed. The detecting part detects opening and closing states when the valve shaft rotates at a long distance.

Description

Control Check Valve {CONTROL CHECK VALVE}

1 is a perspective view showing a control check valve according to the present invention.

Figure 2 is a front view showing a control check valve according to the present invention.

Figure 3 is a side view of the main part showing a control check valve according to the present invention.

Figure 4 is a partial cutaway cross-sectional view showing the main part of the control check valve according to the present invention.

Figure 5 is a cross-sectional view showing the side of the main part of the control check valve according to the present invention.

6 is a partially enlarged cross-sectional view showing a main part of the control check valve according to the present invention.

7a to 7d is an operating state diagram showing the normal operation of the control check valve according to the present invention.

8a to 8c is an operational state diagram showing the emergency operation of the control check valve according to the present invention.

※ Explanation of code about main part of drawing ※

100: valve 110: body

111: valve shaft 112: shaft boss

112a: sleeve bearing 113: body seat

114: disk 115: shaft boss

116: reinforcing rib 117: disc seat

120: drive unit 121: segment

122: drive shaft 123: worm gear

124: worm wheel 124-1: worm wheel fixing portion

125: handle 126: motor

130: counterweight 131: counterweight

132: wait lever 133: fixing bolt

134: set bolt 140: damping part

141: hydraulic cylinder 142: cylinder arm

143: fixing part 144: hydro converter

145: hydraulic line 146: gauge

147: air filter 150: detection unit

151: detector 152: open position switch

153: damping position switch 154: closed position switch

155: position adjusting groove

The present invention relates to a control check valve, and in more detail, configured to rotate by driving the segment 121 and the handle 125 and the motor 126 formed on one side of the valve shaft 111 formed on the disk 114. The worm wheel 124 is configured to interlock and a weight lever 132 is formed on the other side of the valve shaft 111 to fasten the counterweight 131 with a set bolt 134 on one side of the weight lever 132 and the weight The worm gear 123 is formed so that the lever 132 and the hydraulic cylinder 141 are connected to each other, and when the valve 100 is normally operated, the worm gear 123 is configured to interlock with the segment 121 by driving the handle 125 and the motor 126. Due to the rotation of the worm wheel 124 and opening and closing the valve 100 according to the angle of the constant worm wheel, the flow rate can be adjusted, and the counterweight is stopped when the pump is stopped due to the pump trip and power failure and the emergency stop of the valve 100 occurs. Valve by its own weight of 130 By blocked it relates to the control check valve for preventing the back flow of fluid and the number of shock.

In general, the valves installed at the outlet of the pump and the pipeline are used to install butterfly valves, gate valves, and check valves according to their purpose, such as flow control, fluid blocking, and backflow prevention. Valves, gate valves and check valves were connected and used.

However, when installing by connecting a plurality of valves there was a problem that requires a lot of installation space and costly to maintain and install.

In addition, the check valve is installed to prevent the flow of water backflow due to a sudden change in the flow rate in the pump pipeline when power transmission to the motor is interrupted due to problems such as momentary power failure and tripping of the pump during operation of the pump. Used.

However, this check valve affects the change in the flow velocity in the conduit according to the closing time of the disk. Therefore, when the disk of the check valve closes rapidly, the pressure in the conduit rises and falls largely, causing water hammer to act due to fluid transients. There was a problem.

If the disc of the check valve is rapidly closed when the flow of back flow increases due to the rapid flow rate change in the pipeline, the flap hammer is generated in the valve while the flow of back flow collides with the disk of the valve. Due to the slam generated in the pipeline due to the large impact noise and the pressure in the pipeline suddenly rises, pumps, valves, pipelines and other facilities were also damaged.

In addition, when the pressure wave generated in the pipeline reciprocates between the upstream and downstream ends along the shape of the pipeline, and the pressure in the pipeline drops, the water pressure in the pipeline drops below the saturated steam pressure to form a vapor cavity in the pipeline. There was a problem that buckling occurred in the pipeline due to the separation of the water column in the pipeline because eventually the water pressure is lower than the atmospheric pressure.

In addition, as the pressure rises and falls periodically, the pipeline collapses or water separation occurs, causing the pipeline to rupture, and the periodic pressure fluctuations in the pipeline suddenly make accurate pressure control impossible in the automatic control system. As a result, a failure of the measuring instrument occurred and a problem in that the structure adjacent to the pipeline was damaged.

In addition, when the power of the pump is suddenly cut off due to a power failure, the closing time of the check valve is delayed. Therefore, when the water flow rate is reversed, the pump motor is reversed and the nut of the pump shaft sleeve is loosened. There was also a problem, and the reverse rotation was accelerated by the flow of water backed by the pump motor, and there was a problem. Also, because the closing time could not be properly adjusted, the water hammer could not be prevented. Is installed on the pump discharge side.

In addition, in the case of a swing check valve which is generally used, a disk for opening and closing a fluid is opened and closed by rotation of a valve shaft, and a counterweight is formed on one side of the valve shaft to move up and down by the weight of its own weight to open and close the valve.

However, since the swing check valve has a valve shaft located at the top of the body, a loss head is generated during the closing motion caused by the disk weight and the power ratio increases, and the closing angle of the valve increases, causing a slam phenomenon in the pipeline. As the water shock increases, the performance of the valve is reduced and the life is shortened. When the valve is closed, the disk seat formed on the disk comes into close contact with the valve seat as the disk rotates, causing interference and friction to increase seating torque. In addition, since the material of the disk seat is made of synthetic rubber, jamming occurs as the valve seat and the disk come into close contact with each other, so that the disk does not open or the disk seat is worn or damaged, thereby preventing the fluid flow from being smoothly controlled.

In addition, since the disk seat and valve seat surface for controlling the flow of fluid have a one-sided planar structure, the watertightness decreases and deformation occurs in the seat part when used for a long period of time, requiring frequent replacement of the seat, thereby increasing maintenance costs. There was this.

In addition, the swing check valves used in the related art are not streamlined in which the shape of the disk minimizes the resistance of the fluid to reduce the head loss. The upper shape of the disk boss protrudes in parallel with the upper part of the disk. Cavitation and flow separation occur in the pipeline, which leads to an increase in the development of the wake and obstructs the flow of the fluid, which naturally leads to a loss of head and noise.

In order to solve the above problems, the present invention is to form a segment pinched on one side of the valve shaft formed in the disk for controlling the fluid to interlock with the worm wheel rotated by the drive of the handle and the motor, the valve by the weight on the other side of the valve shaft It is configured to open and close the valve according to the angle of the fixed tooth by rotating the worm wheel interlocked with the segment by driving the handle and the motor formed on one side and connecting the counterweight to the hydraulic cylinder. In the case of interruption, emergency interruption and power failure, the valve weight is blocked by the counterweight formed on the other side so that the operation method is different between normal operation and emergency. Properly prevent shocks to improve system stability Is there is provided a control valve.

 In addition, the present invention is to make a streamlined shape of the disk opening and closing the flow path by the rotation of the valve shaft in order to efficiently control the flow of the fluid to form a reinforcing rib up and down of the shaft boss coupled to the valve shaft in the upper portion of the disk The protrusion is formed in a streamlined form to minimize the resistance of the fluid and reduce the head of the loss.The shaft shaft of the body formed on the valve shaft is brought into close contact with the shaft of the disk to form a minimum gap between the disk and the shaft boss. By minimizing damage due to excessive torsion and bending moment caused by slam and water shock, the valve shaft can be protected to extend the service life, reduce the head loss, reduce the power cost, and suppress the flow peeling phenomenon. The control check valve that reduces fluid flow and reduces noise To have its purpose.

In addition, the control check valve according to the present invention forms a limit switch capable of displaying the open position, the damping position, and the closed position at the end of the valve side, so that the state of the valve can be checked even at a long distance, so that the action of the valve can be immediately taken. The purpose is to provide a control check valve that can increase the stability of the equipment.

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

1 is a perspective view of a control check valve according to the present invention, FIG. 2 is a front view of a control valve according to the present invention, FIG. 3 is a side view of a control check valve according to the present invention, and FIG. Sectional cross-sectional view showing a part of the control check valve according to Figure 5 is a side cross-sectional view of the control check valve according to the present invention, Figure 6 is an enlarged cross-sectional view showing a main part of the control check valve according to the present invention, 7a to 7d is an operating state diagram showing a normal operating state of the control check valve according to the present invention, Figures 8a to 8c is an operating state diagram showing an operating state during the emergency operation of the control check valve according to the present invention.

The control check valve according to the present invention as shown in Figure 1 to 8c is formed in the center of the disk 114 valve opening and closing in conjunction with the valve shaft 111 in the body 110 and one side to the body 110 A driving part including a worm gear 124 and a worm wheel 124 formed in the segment 121 so as to interlock with the valve shaft 11, and rotated by the driving of the handle 125 and the motor 126 in the segment 121. The weight is formed to contact with the counterweight and the counterweight 131 and the counterweight so as to interlock with the valve shaft 111 on the other side of the body 110 to close the disk 114 by its own weight The counter weight portion 130 is formed by the lever 132 and the cylinder arm fixing portion 143 formed on the hydraulic cylinder 141 and one side of the weight lever 132 of the counter weight portion 130 is fastened to the valve. The sensor 151 is formed at the end of the shaft, but is formed in the body of the valve. Is formed to be in contact with the sensing unit consisting of the open position switch 154, the damping position switch 153 and the closed position switch is configured to check the opening and closing state of the disc at a remote location when the valve shaft 114 is rotated. It was.

Hereinafter, the control check valve control check valve according to the present invention will be described in more detail. However, the present invention is not limited to the following examples.

 EXAMPLE

Shaft boss 115 is formed on the back of the valve shaft is formed in the center of the body so that the valve shaft 11 penetrates to form the eccentric so that the valve shaft 111 can rotate from the center of the valve shaft to the upper side. The disk 114 to open and close the flow path in conjunction with the disk 114, the disk 114 is formed at the inner periphery of the inner periphery of the body 110 coupled to the disk 114 when rotating the disk (114) While contacting the disk sheet 117 formed on the outer periphery of the 114, the disk 114 is configured to connect with the conduit so as to prevent the outflow of the fluid during opening and closing.

 At this time, the shaft boss 112 is extended to the inside of the body 110 to the portion where the valve shaft 111 is installed in the body 110 to be in close contact with the shaft boss 115 portion of the disk 114 to the shaft boss ( Since the interference between the disc 114 and the disc 114 is narrowed as much as possible, the opening of the disc 114 is freed, and the valve shaft due to excessive twisting and bending moment due to slam and water shock is freed. It was configured to prevent breakage of the (111) and formed a sleeve bearing (112a) in the extended shaft portion to smooth the operation of the portion of the shaft boss 112 extending to the inside of the body (110).

In addition, the lower portion of the valve body 110 is formed in a horizontal structure in parallel and the upper portion of the body 110, the valve shaft 111 is installed is the valve shaft 111 and the shaft boss 112 and the disk 114 of the body In order to prevent the flow resistance generated in the axial boss 115 of the streamlined circular arc shape or airfoil shape formed in the upper extended structure to greatly expand the cross-sectional area of the flow path inside the body 110 to minimize the loss head.

In addition, the disk 114 has a streamlined shape in order to minimize the resistance of the fluid and reduce the head of the fluid. The disk 114 is formed by forming the reinforcing ribs 116 on the upper and lower portions of the shaft boss 115 of the disk 114. And the shaft shaft 115 to which the valve shaft 111 is interlocked to improve structural stability and fluidity of the fluid, and the upper shape of the shaft boss 114 is also streamlined, thereby suppressing flow peeling and developing downstream. It was possible to reduce the flow of fluid to reduce the loss head and noise was reduced, and the body seat 113 and the disk 114 that rotates while making a surface contact with the disk 114 formed on the body 110 By forming a plurality of sheets in the form of rounding to the left and right sides of the contact surface of the disk sheet 117 of the metal material formed at the periphery to minimize the rotation interference of the disk sheet when the disk 114 rotates in the surface contact state Also, the disk 114 was configured to rotate.

In addition, a segment 121 coupled to interlock with the valve shaft 111 is formed, and the segment 121 is coupled to a semi-circular worm wheel 124 capable of rotating the valve shaft 111, but the worm wheel 124 is formed. One side of the worm gear 123 is formed to be tooth-coupled and the drive shaft 122 is formed to rotate the worm gear in the center of the worm gear 123 and to rotate the drive shaft 122 on top of the drive shaft 122 The drive unit 120 formed with the handle 125 and the motor 126 is formed on one side of the body 110 and the drive shaft 122 and the valve shaft 111 interlock so that the valve shaft can be operated by the rotation of the drive shaft. It was.

On the other side of the body 110, the counterweight 130 is formed so that the disk 114 can be closed by its own weight, so that the closing speed of the disk 114 can be adjusted according to the fluid supply pressure and the backflow time. Upper and lower gauges 146 for connecting the hydraulic line through which hydraulic oil is supplied and discharged to the hydraulic cylinder 142 with the hydroconverter 144 formed on the upper portion and checking the hydraulic oil level of the hydraulic cylinder. The damping part 140 is connected to each other, and the fixing part 143 of the hydraulic cylinder 142 is fastened to the wait lever 132, so that the closing speed of the disc 114 by the weight of the counterweight 134 is closed. To adjust.

In addition, the open position switch 152, the damping position switch 153 and the closing position switch 154 is formed on the other side of the body 110, so as to be in contact with the detector 151 formed at the end of the valve shaft 111 It was configured to remotely detect the state of the valve 100 according to the position of the disk 1143 at the time of driving the valve 100.

The control check valve according to the present invention opens and closes the disk 114 by rotating the worm gear 12 coupled to the valve by driving the motor 126 and the handle 125 during normal operation. There is an effect that can be arbitrarily adjusted and in the case of emergency, the disk 114 is closed by the weight of the counterweight 130 combined with the counterweight 131 and the hydraulic cylinder 141, so that the butterfly valve, gate valve, check The function of the valve can be replaced by a single valve, thereby reducing the purchase cost, minimizing the installation space, and combining the hydraulic cylinder 141 to one side of the counterweight 131 that operates in an emergency. It is possible to reduce the cost of maintenance by preventing the slam and water shock by configuring the closing time of the pump to prevent slam and water shock. It is formed on the outer periphery of the disk to block the fluid while rotating the disk sheet 117 made of a metal sheet material and can minimize the rotational interference of the body sheet 113 formed on the body to which the disk 114 is coupled It is formed in the shape to increase the sealing force and in normal operation combined with the worm gear moves at the correct angle and speed, and in the emergency operation the hydraulic weight 141 formed on the weight of the counterweight 131 and the lower portion of the counterweight 131 Since the closing speed is controlled by the damping action of), the shock is reduced when the disc 114 is opened and closed, thereby preventing damage to the valve 100 and additional facilities.

In addition, the shape of the disk 114 for opening and closing the flow path by the rotation of the valve shaft 111 to control the flow of the fluid in a streamlined shape, the shaft boss on the upper body 110 to which the valve shaft 111 is coupled. (115) Since the compensation ribs 116 are formed up and down to form the protrusions in a streamlined form, the resistance of the fluid is minimized, and the shaft boss 112 of the body 110 having the valve shaft 111 is formed on the disk 114. Extends to the shaft boss 115 to minimize the gap between the shaft boss 112 of the body 110 and the shaft boss 115 of the disk 114 to excessively twist and bend the valve shaft 111 by slam and water hammer. By minimizing the breakage caused by the action of the moment, it is possible to extend the life of the valve and reduce the head of the loss so that the fluid flows smoothly. .

In addition, the control check valve according to the present invention is formed on the other side of the valve shaft 111 to form a prefabricated form to adjust the weight and position of the counterweight 131 to open and close the valve by its own weight to install the valve 100 It is formed to adjust the weight and position of the counterweight 131 in consideration of the flow rate and the fluid velocity at the time, so that the closing time of the disk 114 can be changed and adjusted according to the situation. Limit switch that can display the pressure, damping position, and closed position, so that the status of the valve can be checked even at a long distance, so that the action can be taken immediately when the valve is out of order, thereby increasing the stability of the equipment. There is an effect.

Claims (8)

In the control check valve which is installed at the outlet side of the pump to prevent the reverse flow of the water flow rate,  The shaft is formed in the rear of the valve shaft is formed so that the valve shaft 11 penetrates to the center of the body 110, the valve shaft 111 is rotated from the center of the valve shaft 100 to the upper side. Since it is interlocked with the boss 115 to form a disk 114 that can open and close the flow path, the disk sheet 114 is formed by protruding the body sheet 113 on the inner circumference of the body 110 to which the disk 114 is coupled. A body 110 configured to prevent fluid leakage when the disk 114 is closed while being in surface contact with the disk sheet 117 formed at the outer circumference of the disk 114 during rotation; The segment 121 is formed to be interlocked with the valve shaft 111 and the segment 121 is coupled to a semi-circular worm wheel 124 for rotating the valve shaft 111, but one side of the worm wheel 124 is a worm gear ( 123 and the handle 125 so as to form a gear coupling and to form a drive shaft 122 for rotating the worm gear in the center of the worm gear 123 and to rotate the drive shaft 122 on the drive shaft 122 A driving unit 12 having a motor 126 formed on one side of the body 110 and interlocking the driving shaft 122 with the valve shaft 111; The counterweight 130 is formed on the other side of the body 110 so that the disk 114 can be closed by its own weight, and the counterweight 134 is configured to adjust the weight of the counterweight 134. A position adjusting groove 155 is formed in the weight lever 132 to adjust the position, and the wait lever 132 and the valve shaft 111 are formed to rotate in conjunction with each other so that the valve can be closed by closing the disc when closing. A counterweight portion 130 formed to be provided; The gauge 146 which connects the hydraulic line through which hydraulic oil is supplied to and discharged from the hydraulic cylinder 142 to the hydroconverter 144 formed on the upper portion and checks the level of the hydraulic oil inside the hydraulic cylinder is mounted on the top of the hydroconverter 144. A damping part 140 connected to the lower part and fastening the fixing part 143 of the hydraulic cylinder 142 with the wait lever 132 so as to control the closing speed when closing; A sensor 151 is formed at the end of the valve shaft, and the valve shaft 114 is rotated by contacting with the open position switch 154, the damping position switch 153, and the closed position switch formed in the valve body. Control check valve 100, characterized in that comprises a detection unit 150 configured to check the opening and closing state of the disk at a distance. The method of claim 1, Since the reinforcing ribs 116 are formed on the upper and lower portions of the shaft boss 115 for fixing the disk 114 of the body 110 with the valve shaft, the shaft boss 115 is reinforced to enhance structural stability and fluid flow. And, the control check valve 100, characterized in that to form a streamlined upper shape of the shaft boss 115 so as to suppress the flow separation phenomenon to reduce the wake development and the resulting noise. The method of claim 1, A disk boss 112 is installed on the body 110 to free the opening of the disk 114 and to prevent damage of the valve shaft 111 due to excessive twist and bending moment due to slam and water impact. The shaft is formed to be in close contact with the shaft boss 115 of 114 to form the narrowest gap between the shaft boss 112 and the disk 114 as much as possible and to facilitate the operation of the valve shaft 111. The boss 112 has a stepped end and a sleeve bearing 112a is installed, so that the valve shaft 111 is smoothly operated. The method of claim 1 The lower portion of the valve body 110 is formed in a horizontal structure parallel to the valve shaft 111 is installed in the body 110 is the valve shaft in a structure in which the upper portion is expanded in a circular arc shape or airfoil extended toward the upper portion Due to the 111 and the shaft boss 112 and the disk 114 of the body to minimize the flow resistance and loss generated in the shaft boss 115 and to expand the cross section inside the valve 100 by expanding the flow path of the body loss Control check valve 100, characterized in that to minimize the head. The method of claim 1, In order to minimize the rotational interference of the disk during the rotation of the disk 114, the body sheet is formed on the surface in contact with the disk sheet 117 of the metal material formed on the outer periphery of the disk 114, but the plurality of sheets have elasticity The control check valve 100, characterized in that the left and right sides of the contact portion is formed of a metal material of a rounded form. The method of claim 1, The sensing unit 150 is an open position in which the detector 151 formed at the end of the valve shaft 111 is formed in the body 110 of the valve according to the position of the disk when the valve shaft 111 rotates. Since the contact with the switch 152, the damping position switch 153 and the closed position switch 154, it is possible to remotely detect the state of the valve 100 in accordance with the position of the disk 114 when the valve 100 is driven. Control check valve (100) characterized in. The method of claim 1, The gauge 146 which connects the hydraulic line through which the hydraulic oil is supplied and discharged to the hydraulic cylinder 142 with the hydroconverter 144 formed on the upper portion and checks the hydraulic oil level inside the hydraulic cylinder is mounted on the top of the hydroconverter 144. Connected to the lower and fastened the fixing portion 143 of the hydraulic cylinder 142 and the wait lever 132, so that the closing speed is controlled when closing and the valve shaft 111 is formed to move the top to open the disk Control check valve 100 characterized in that it comprises a damping unit (140). The method of claim 1 Worm wheel fixing part formed of steel material in the driving unit 120 to prevent noise generated when the worm wheel 124 and the worm gear 123 are operated and to operate the worm wheel 124 and the worm gear 123 smoothly. The worm wheel 124 formed of aluminum or copper alloy material or non-metallic material is fixed to the 124-1 with a pin so as to engage with the worm gear 123 of steel material formed to operate in conjunction with the worm wheel 124 and the drive shaft 122. Control check valve 100, characterized in that to form.

Images