KR102090481B1 - Pneumatic pulse generator and fixed quantity suppply device using therof - Google Patents

Abstract

The present invention is a piston rod according to the pneumatic pulse branched by a branch pipe connected to each of the first discharge port and the second discharge port for the pneumatic pulse having two alternating cycles generated from the pneumatic pulse generator. It provides a quantitative supply device including a second pneumatic cylinder for reciprocating and a first transfer unit for transferring the chemical according to the reciprocating motion of the piston rod of the second pneumatic cylinder.
According to the present invention, by not using a solenoid when generating a pneumatic pulse to drive a pneumatic cylinder, there is no need to construct an explosion-proof facility by fundamentally preventing the generation of an excessive voltage, thereby reducing installation cost.

Description

Pneumatic pulse generator and quantitative supply device using the same {PNEUMATIC PULSE GENERATOR AND FIXED QUANTITY SUPPPLY DEVICE USING THEROF}

The present invention relates to a pneumatic pulse generator and a quantitative supply device using the same, to generate a periodic pneumatic pulse to operate the pneumatic cylinder to provide a pneumatic pulse generator capable of quantitatively introducing drugs and raw materials and a quantitative supply device using the same It is about.

A pneumatic device is a device that uses air pressure to perform desired control in an industrial automation site, and uses compressed air discharged from a compressor as a power transmission medium. The pneumatic cylinder is capable of reciprocating the piston rod by supplying compressed air through two ports respectively, advancing the piston when compressed air flows into one port, and retracting the piston when compressed air flows into the other port. A pneumatic cylinder having two ports can be used to transmit power to a device by reciprocating of a piston rod or to transport a liquid substance using a check valve to inject quantitatively at a desired place. Meanwhile, in order to apply compressed air (pneumatic pulse) to two ports of the pneumatic cylinder, a servo valve that controls the flow of air is used.

As a prior art related to the generation of pneumatic pulses of the pneumatic cylinder, the pneumatic servo valve of Korean Patent Registration No. 10-0430052 uses a torque motor that controls a spool that interrupts the fluid flow through an electrical signal. That is, in controlling the position of the spool, the prior art uses a solenoid method using a magnetic force, so when the current of the solenoid coil is cut off, a transient voltage of several hundred times the normal voltage may occur.

Meanwhile, in a petrochemical plant in an environment where oil vapor is distributed according to air vapor, a solenoid-type metering pump is used to quantitatively inject additives, corrosion inhibitors, cleaners, etc. into piping and tanks. The solenoid method based on the electric signal has a risk of explosion due to the occurrence of a transient voltage, and thus, there is a problem in that the cost of equipment is high because an explosion-proof motor must be used in a petrochemical plant. In addition, a metering pump used in a system for dispensing chemicals with high pressure in semiconductor equipment must use an explosion-proof motor, and these explosion-proof motors must be equipped with explosion-proof equipment, which is difficult to be used in a small space due to their large size. In addition, paper mills that perform a lot of water treatment processes require frequent water cleaning in order to clean the environment caused by paper and powder dust, and thus, when using a motor, there is a problem that a motor malfunction due to water occurs.

Therefore, in controlling the pneumatic cylinder by the solenoid method, a pneumatic pulse generator having a new structure that can solve explosion-proof problems in petrochemical plants, installation space problems in semiconductor plants, and water malfunctions in paper mills, and It will be said that it is necessary to develop a quantitative supply device.

Republic of Korea Registered Patent Publication No. 10-0430052 (2004.05.04)

The present invention has been devised to solve the above-mentioned problems, and the object of the present invention is to generate a pneumatic pulse only with compressed air discharged from a compressor without using an electric solenoid structure, and to control a pneumatic cylinder by the generated pneumatic pulse. It is intended to provide a pneumatic pulse generator capable of quantitatively injecting chemicals into a pipe or tank, and a quantitative supply device using the same.

In order to solve the above problem, the pneumatic pulse generator according to an embodiment of the present invention is a first discharge port or a second discharge port according to the reciprocating motion of the piston rod of the first pneumatic cylinder to the compressed air introduced through the inlet port A pneumatic actuating valve that discharges periodically through pneumatic pulses and a pneumatic pulse periodically discharged through the first discharge port or the second discharge port are supplied to the first supply port or the second supply port to reciprocate the piston rod. 1 It may include a pneumatic cylinder.

The pneumatic pulse generator according to an embodiment of the present invention is characterized in that it is turned on and off by blocking air flowing into the pneumatic operation valve by a stop valve.

The quantitative supply device according to an embodiment of the present invention is a branch pipe connected to each of the first discharge port and the second discharge port for the pneumatic pulse having two alternating cycles generated from the pneumatic pulse generator to branch the pneumatic pulse It may include a second pneumatic cylinder for reciprocating the piston rod according to the pneumatic pulse branched by and a first transfer unit for transferring the chemical according to the reciprocating motion of the piston rod of the second pneumatic cylinder.

In the quantitative supply device according to an embodiment of the present invention, a pneumatic pulse is branched by another branch pipe, and the third pneumatic cylinder for reciprocating the piston rod according to the branched pneumatic pulse and the piston rod of the third pneumatic cylinder It may further include a second transfer unit for transferring the drug according to the reciprocating motion.

One side of the first and second transfer parts according to an embodiment of the present invention includes a first check valve connected to a chemical storage part and a second check valve connected to a chemical injection part, and a second pneumatic cylinder and The piston rod of the third pneumatic cylinder is characterized by reciprocating motion alternately.

According to the present invention as described above, by not using a solenoid when generating a pneumatic pulse for driving a pneumatic cylinder, it is possible to reduce the installation cost by preventing the need to build an explosion-proof facility by preventing excessive voltage generation.

In addition, the pneumatic pulse is periodically generated by one pneumatic actuating valve and one pneumatic cylinder to control other pneumatic cylinders used for quantitative injection, so there is no need to provide explosion-proof equipment. Because it is small, it can be installed in a narrow space.

In addition, since it has only a mechanical structure such as a pneumatic actuating valve and a pneumatic cylinder, it is possible to fundamentally prevent a malfunction caused by water.

In addition, by branching the pneumatic pulse generated from the pneumatic actuating valve by the branch pipe, it is possible to increase the efficiency of chemical supply in a predetermined time range by simply adding an additional pneumatic cylinder during quantitative injection.

1 is a view showing a quantitative supply device using a pneumatic pulse generator according to an embodiment of the present invention.
2 is a view for explaining the operation of the pneumatic pulse generator according to an embodiment of the present invention.
3A and 3B are views for explaining the operation of the pneumatically operated valve according to an embodiment of the present invention.
4 is a view for explaining the operation of transferring the drug by alternately reciprocating two piston rods according to an embodiment of the present invention.
5 is a view showing a real picture of a pneumatic pulse generator according to an embodiment of the present invention.

The present invention can be applied to various transformations and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention and methods for achieving them will be clarified with reference to embodiments described below in detail with reference to the drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms. In the following examples, terms such as first and second are not used in a limiting sense, but for the purpose of distinguishing one component from other components. In addition, a singular expression includes a plural expression unless the context clearly indicates otherwise. In addition, terms such as include or have means that a feature or component described in the specification exists, and does not preclude the possibility of adding one or more other features or components in advance. In addition, in the drawings, the size of components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to those illustrated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals when describing with reference to the drawings, and redundant description thereof will be omitted. .

1 is a view showing a quantitative supply device using a pneumatic pulse generator according to an embodiment of the present invention.

As shown in FIG. 1, the quantitative supply device 1000 receives compressed air discharged from a compressor (not shown) and periodically generates two pneumatic pulses alternately to quantitatively generate liquid, such as piping or tank chemical injection part. It may include a pneumatic pulse generator 100 for supplying to the transfer unit 200 to transfer to.

The metering supply device 1000 may include an air regulator 3 capable of adjusting compressed air discharged from the compressor to a preset air pressure required by the pneumatic pulse generator 100. The quantitative supply device 1000 includes a plurality of branch pipes 5 capable of branching pneumatic pulses having two alternating cycles discharged from the pneumatic pulse generator 100, and branching by the branch pipe 5 The pneumatic pulse may be fed back to the first pneumatic cylinder 120 of the pneumatic pulse generator 100, and may also be supplied to the transfer unit 200 capable of quantitatively transferring the medicine to the medicine injection unit. The pneumatic pulse discharged through the first discharge port 11 and the second discharge port 12 of the pneumatic operation valve 110 may be branched to the first cylinder 120 and the transfer part 200 through the branch pipe 5. have. In addition, the pneumatic pulse branched to the transfer unit 200 is supplied to the second cylinder 210 and the third cylinder 220 through the branch pipes 5a, 5b to reciprocate each piston rod to quantitatively supply the drug to the medicine injection unit. You can.

The transfer unit 200 may inhale the medicine in the medicine storage unit and discharge it to the medicine injection unit by the second pneumatic cylinder 210 that reciprocates the piston rod by the supplied pneumatic pulse. The transfer unit 200 may further include a third pneumatic cylinder 220 by branching the pneumatic pulses discharged from the pneumatic pulse generator 100 by branch pipes 5a and 5b. The transfer unit 200 may increase the efficiency of supplying chemicals according to the operation of a plurality of pneumatic cylinders for a predetermined time when quantitatively supplying the chemicals by the third pneumatic cylinder 220 that is additionally installed. Quantitative supply device 1000 is made of only a mechanical element to generate a number of pneumatic pulses for reciprocating the pneumatic cylinder to prevent the risk of explosion even under an environment such as oil vapor, thereby incurring the cost of explosion-proof equipment If not, installation cost can be reduced.

Hereinafter, the pneumatic pulse generator 100 for generating pneumatic pulses having two alternating cycles will be described with reference to FIGS. 2 to 3B, and the transfer unit 200 will be described in detail with reference to FIGS. 2 and 4.

2 is a view for explaining the operation of the pneumatic pulse generator according to an embodiment of the present invention, Figures 3a and 3b is a view for explaining the operation of the pneumatic valve according to an embodiment of the present invention .

2 to 3B, the pneumatic pulse generator 100 is a first discharge port (in accordance with the reciprocating motion of the piston rod of the first pneumatic cylinder 120, the compressed air introduced through the inlet port 10) 11) or a pneumatic actuating valve (110) for discharging with a periodic pneumatic pulse through the second discharge port (12) and a pneumatic pulse discharged periodically through the first discharge port (11) or the second discharge port (12) A may include a first pneumatic cylinder 120 that is supplied to the first supply port 21 or the second supply port 22 to reciprocate the piston rod.

Referring to Figure 3a, the pneumatic pulse generator 100 is compressed air supplied into the pneumatic operation valve 110 through the inlet port 10 is discharged to the first discharge port 11 and the first pneumatic cylinder (120) ) Flows into the first supply port 21 to extend the piston rod 121 so that the pneumatic actuation valve 110 can move to the position of FIG. 3B. At this time, according to the extension of the piston rod 121, the compressed air inside the first pneumatic cylinder 120 is discharged through the second supply port 22 and flows into the second discharge port 12 of the pneumatic operation valve 110 It can be discharged through the exhaust port (13). The pneumatic operation valve 110 in the position of FIG. 3b continuously discharges compressed air supplied into the pneumatic operation valve 110 through the inlet port 10 to the second discharge port 12 and the first pneumatic cylinder ( 120) is introduced into the second supply port 22 and compresses the piston rod 121, so that the pneumatic operation valve 110 can be moved back to the position of FIG. 3A. At this time, the compressed air in the first pneumatic cylinder 120 according to the compression of the piston rod 121 is discharged through the first supply port 21 and flows into the first discharge port 11 of the pneumatic operation valve 110 It can be discharged through the exhaust port (14). The pneumatic pulse generator 100 may be turned on and off by blocking air flowing into the pneumatic actuating valve by the stop valve 1. That is, the pneumatic pulse generator 100 discharges the compressed air having two alternating cycles, and the piston of the first pneumatic cylinder 120 for changing the position (position) of the pneumatic operation valve 110 By using the rod as the power to reciprocate, the position of the pneumatic actuating valve can be reciprocated to FIGS. 3A and 3B (see the actual picture of the pneumatic pulse generator of FIG. 5). Meanwhile, the pneumatic pulse generator 100 provides an air regulator 6 and a speed controller 7 to maintain a predetermined air pressure when supplying compressed air discharged from the pneumatic operation valve 110 to the first pneumatic cylinder 120. It can contain.

4 is a view for explaining the operation of transferring the drug by alternately reciprocating two piston rods according to an embodiment of the present invention.

Referring to FIG. 4, the transfer unit may include a second pneumatic cylinder 210 operated by a pneumatic pulse, and a first transfer unit 240 transferring chemicals by the operation of the pneumatic cylinder. The transfer unit may further include a third pneumatic cylinder 220 and a second transfer unit 250 additionally by a pneumatic pulse branched by the branch pipes 5a and 5b. Pneumatic pulses having two alternating cycles discharged from the pneumatic operation valve 110 through the branch pipes 5a and 5b are respectively provided with a first supply port 31 of the second pneumatic cylinder 210 and the third pneumatic cylinder 220 , 41) and the second supply ports (32, 42). The second pneumatic cylinder 210 and the third pneumatic cylinder 220 in order to extend the piston rod 211 of the second pneumatic cylinder 210 in order to reverse the reciprocating motion of the piston rod (forward), the pneumatic pulse is the first In order to compress the piston rod 221 of the third pneumatic cylinder 220 (reverse direction) into the supply port 31, the pneumatic pulse may be introduced into the first supply port 41. That is, it can be made by applying a pneumatic pulse to the opposite direction of the pneumatic cylinder is set in advance to reverse the piston rod reciprocating motion of the two pneumatic cylinders.

The first transfer unit 240 and the second transfer unit 250 of the storage unit (245,255) in order to quantitatively transfer the chemicals in the storage unit (245,255) toward the drug injection unit according to the reciprocating motion of each piston rod (211,221) Check valves can be connected to both sides. That is, one side of the first and second transfer parts 240 and 250 may include a first check valve 241a and 251a connected to the medicine storage part and a second check valve 241b and 251b connected to the other side of the medicine injection part. have. The first check valve (241a, 251a) and the second check valve (241b, 251b) each piston rod (211,221) is extended to increase the pressure in the storage unit (245,255), the drug in the storage unit to the drug injection unit Discharge, when each piston rod (211,221) is compressed and the pressure in the storage unit (245,255) is lowered to have both sides of the storage unit (245) with proper orientation so that the drug can flow from the drug storage unit to the storage unit (245) Can be connected. That is, the first check valve (241a, 251a) and the second check valve (241b, 251b) is the pressure of the storage portion (a space inside the pneumatic cylinder or a space where the piston rod can reciprocate) to transport the chemical. Accordingly, the storage unit may be connected to the storage unit so that only one can be opened and closed, and the check valve may have a structure such as a swing type, a plate type, or a ball type.

The conveying part increases supply efficiency in supplying quantitative chemicals for a predetermined time by reciprocating movement of the piston rods in which the two pneumatic pistons move in opposite directions by pneumatic pulses having two alternating cycles generated from the pneumatic actuating valve. You can. For example, the piston rod 221 of the third pneumatic cylinder is extended to the storage unit 255 while the piston rod 211 of the second pneumatic cylinder is compressed and injecting the medicine from the medicine storage unit to the storage unit 245 The drug can be supplied to the drug injection section. In addition, by supplying chemicals using two pneumatic cylinders, it is possible to supply chemicals in accordance with the standard even when the range of the supply of chemicals through one cylinder is exceeded. In addition, the transfer unit can control the amount of chemical injection by adjusting the length at which the piston rod of each pneumatic cylinder is extended or compressed. The extension or compression of the piston rod can be achieved through a distance adjusting member (not shown) that is screwed into the inside of the pneumatic cylinder on the horizontal line with the piston rod of the pneumatic cylinder and the scale is displayed on the surface. That is, by adjusting the length of the piston rod extending by the rotation of the distance adjusting member, it is possible to control the amount of chemicals flowing into and out of the storage chamber accordingly.

In the above, the present invention has been described in detail through exemplary embodiments, but those skilled in the art to which the present invention pertains can make various modifications within the limits of the embodiments described above without departing from the scope of the present invention. Will understand.

Therefore, the scope of rights of the present invention should not be limited to the described embodiments, and should be determined not only by the claims to be described later, but also by the claims and equivalents.

1: Stop valve 3: Air regulator
5: branch pipe 6: air regulator
7: Speed controller 10: Inlet port
11: First discharge port 12: Second discharge port
13, 14: Exhaust port 21, 31, 41: 1st supply port
22,32,42: Second supply port 100: Pneumatic pulse generator
110: pneumatic operation valve 120: first pneumatic cylinder
121,211,221: Piston rod 200: Chemical transfer part
210: second pneumatic cylinder 220: third pneumatic cylinder
240: first transfer section 250: second transfer section
245,255: storage 241a, 251a: first check valve
241b, 251b: second check valve 1000: fixed quantity supply

Claims (5)

delete delete It is located structurally independent of the first pneumatic cylinder, the end of the piston rod 121 of the first pneumatic cylinder is directly connected, and compressed air supplied into the pneumatic actuating valve 110 through the inlet port 10 is removed. 1 It is discharged to the discharge port (11) and flows into the first supply port (21) of the first pneumatic cylinder (120) to extend the piston rod (121) and at the same time the compressed air inside the first pneumatic cylinder (120). It is discharged through the second supply port 22 and flows into the second discharge port 12 of the pneumatically operated valve 110 and is discharged through the exhaust port 13,
Compressed air supplied into the pneumatic actuating valve 110 through the inlet port 10 is discharged to the second outlet port 12 and introduced into the second supply port 22 of the first pneumatic cylinder 120, thereby causing the piston rod to At the same time as compressing (121), the compressed air inside the first pneumatic cylinder (120) is discharged through the first supply port (21) and introduced into the first discharge port (11) of the pneumatic actuating valve (110) to exhaust. Pneumatic actuating valve that discharges compressed air introduced through the inlet port through the port 14 through the first outlet port or the second outlet port according to the reciprocating motion of the piston rod of the first pneumatic cylinder ( 110),
When supplying compressed air discharged from the pneumatic operation valve 110 to the first pneumatic cylinder 120, an air regulator 6 and a speed controller 7 for maintaining a predetermined pneumatic pressure,
It is connected to each of the first discharge port and the second discharge port, a first branch pipe 5 for branching a pneumatic pulse to a first pneumatic cylinder and a transfer part, and a second pneumatic cylinder connected to the first branch pipe and a pneumatic pulse. The second pneumatic cylinder 210 and the third pneumatic cylinder 220 for reciprocating the piston rod according to the pneumatic pulse branched by the second branch pipes 5a, 5b which branch to the third pneumatic cylinder, and
When the piston rods 211 and 221 are extended according to the reciprocating motions of the respective piston rods 211 and 221 of the second pneumatic cylinder and the third pneumatic cylinder, the pressure in the storage portions 245 and 255 is increased, and the medicine in the storage portion is discharged to the medicine injection portion. And, when each piston rod (211,221) is compressed and the pressure in the storage unit (245,255) decreases, the drug is transferred from the drug storage unit to the storage unit (245, 255) to transfer the drug from the drug storage unit to the drug injection unit It includes a transfer unit (240,250) for quantitatively supplying the drug through the first check valve (241a, 251a) and the second check valve (241b, 251b),
The transfer unit (240,250) is the piston rod 211 of the second pneumatic cylinder is compressed by reversing the reciprocating motion of the piston rod of the second pneumatic cylinder and the third pneumatic cylinder to inject chemicals from the medicine storage unit to the storage unit (245). While, the piston rod 221 of the third pneumatic cylinder is extended to supply the drug in the storage unit 255 toward the drug injection unit,
Quantitative supply device, characterized in that to control the supply amount of the drug by adjusting the length of the extension of the piston rod through the distance adjusting portion of the second pneumatic cylinder and the third pneumatic cylinder. delete delete

Images