KR101438429B1 - Metering pump of hydraulic bypass type - Google Patents

Abstract

An invention relating to a metering pump of a hydraulic bypass method is disclosed. The disclosed metering pump of the hydraulic bypass method includes a drive unit for generating a pumping force by an applied power source; A bypass unit for reciprocating the hydraulic fluid by a pumping force of the drive unit; A fluid supply unit for pumping fluid by operating fluid; And a fluid delivery unit through which the fluid is delivered by the application unit; Wherein the bypass unit includes: a driving rod portion reciprocally coupled to the driving unit by a pumping force; A piston unit coupled to the driving rod unit and reciprocating the operating oil; An opening / closing block for supporting the driving rod portion or the piston portion so as to reciprocate; And an opening / closing control unit provided in at least one of the driving rod unit and the piston unit to bypass the operating oil according to the reciprocating motion of the driving rod unit or the piston unit. And a control unit.

Description

METERING PUMP OF HYDRAULIC BYPASS TYPE [0002]

The present invention relates to a metering pump of a hydraulic bypass type, and more particularly, to a metering pump of a hydraulic bypass type, capable of preventing overflow of hydraulic oil through a bypass unit during an intake stroke, preventing loss of stroke due to clearance of the piston To a metering pump of a hydraulic bypass type in which a stable pumping action can be performed.

Generally, a hydraulic metering pump can regulate the discharge amount of fluid by regulating the stroke length (or reciprocating length) of the piston (or plunger) and the stroke length (or reciprocating length) of the piston by reciprocating the piston.

In addition, the metering pump of the hydraulic bypass method can adjust the discharge amount of the fluid by bypassing the operating fluid instead of adjusting the stroke length of the piston.

In this case, when the operating oil is bypassed, the amount by which the operating oil is bypassed is changed according to the discharge pressure, so that a difference in discharge amount depending on the discharge pressure may occur. However, the structure is simplified as compared with the reciprocating motion of the piston, Elimination of parts can increase durability.

A related prior art is the Korean Utility Model Registration No. 20-0236763 (registered on June 22, 2001, designation: Hydraulic metering pump).

It is an object of the present invention to provide a hydraulic bypass system capable of preventing overflow of hydraulic fluid through a bypass unit during an intake stroke and preventing loss of stroke due to clearance of the piston, And to provide a metering pump.

The metering pump of the hydraulic bypass method according to the present invention comprises a driving unit for generating a pumping force by an applied power source; A bypass unit for reciprocating the hydraulic fluid by a pumping force of the drive unit; A fluid supply unit for pumping fluid by the operating fluid; And a fluid delivering unit to which the fluid is delivered by the adsorption unit; Wherein the bypass unit includes: a driving rod portion reciprocally coupled to the driving unit by the pumping force; A piston portion coupled to the driving rod portion and reciprocating the working oil; An opening / closing block for reciprocally supporting the driving rod portion or the piston portion; And an opening / closing control unit provided at at least one of the driving rod unit and the piston unit to bypass the operating oil according to the reciprocating movement of the driving rod unit or the piston unit. And a control unit.

Here, the piston portion may include a communication passage portion communicating with the opening / closing control portion to form a moving path of the operating oil; Is provided.

Here, the opening / closing control portion may include a bypass flow path portion provided in the driving rod portion or the piston portion to communicate with the communication flow path portion; And a bypass portion provided between the communication passage portion and the bypass passage portion to change a moving direction of the hydraulic oil according to the reciprocating movement of the piston portion; And a control unit.

Here, the opening / closing control part may include: a fixed hole part having the bypass part connected to the communication flow path part and the bypass flow path part; And further comprising:

Here, the bypass portion may include: a hollow communicating body portion connecting the communication passage portion and the bypass passage portion such that the operating oil is moved; A communication cap portion coupled to the communication body portion and having a communication hole portion through which the operating oil moves; A guide pin portion inserted into the communicating body portion such that the operating fluid is movably supported and supported by the communication cap portion; A slider part moving along the guide pin part according to the movement of the operating oil to control the movement of the operating oil; And an elastic support portion for elastically supporting the slider portion corresponding to the movement of the operating oil. And further comprising:

Here, the communicating body portion may be provided with a blocking protrusion for restricting the movement of the hydraulic fluid in accordance with the movement of the slider portion; Is provided.

Here, the bypass unit may include: a cylinder part forming a reciprocating path of the piston part; And further comprising:

Here, the bypass unit may include a step regulating unit for regulating the amount of the hydraulic fluid bypassed by the opening / closing control unit; And further comprising:

Here, the step regulating unit may include an adjusting dial unit for distinguishing the amount of the operating oil to be regulated; An adjustment rod portion moved by the adjustment dial portion; And an inclined guide part provided on the opening / closing block so that the opening / closing block moves according to the movement of the regulating rod part. And a control unit.

Here, the step regulating unit may include: an elastic regulating unit elastically supporting the opening / closing block corresponding to the movement of the regulating rod unit; And further comprising:

The metering pump of the hydraulic bypass method according to the present invention can prevent overflow of the operating oil through the bypass unit during the suction stroke and prevent the loss of the stroke length due to the clearance of the piston, .

In more detail, since the present invention is transmitted to the diaphragm 100% by the stroke length of the piston, it is possible to prevent the loss of the stroke length due to the reciprocating motion.

Further, according to the present invention, the performance of the metering pump can be improved in response to the margin of the driving force of the driving portion in accordance with the set value of the rated pressure of the relief valve.

Further, the present invention facilitates replacement of parts and can be made convenient.

Further, the present invention can simplify the behavior of the hydraulic oil in the operating oil chamber, and improve the accuracy of the suction stroke and the discharge stroke.

1 is a partially exploded perspective view showing a combined state of a drive unit and a bypass unit in a metering pump of a hydraulic bypass system according to an embodiment of the present invention,
FIG. 2 is a partially exploded perspective view showing a state of engagement between a liquid-receiving unit and a fluid delivery unit in a metering pump of a hydraulic bypass system according to an embodiment of the present invention,
3 is an exploded perspective view showing a main part of a bypass unit in a metering pump of a hydraulic bypass system according to an embodiment of the present invention,
4 is a cross-sectional view illustrating a bypass unit in an embodiment of the present invention,
FIG. 5 is a view showing a combined state of the bypass unit according to an embodiment of the present invention, FIG.
FIG. 6 is a view showing a discharge preparation state of a fluid according to an embodiment of the present invention,
7 is a view showing a discharge progression stroke of a fluid according to an embodiment of the present invention,
FIG. 8 is a view showing a discharge completion state of a fluid according to an embodiment of the present invention; FIG.
9 is a view showing a suction progression stroke of a fluid according to an embodiment of the present invention,
FIG. 10 is a view showing a suction completion state of a fluid according to an embodiment of the present invention. FIG.

Hereinafter, an embodiment of a metering pump of a hydraulic bypass system according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a partially exploded perspective view showing a combined state of a drive unit and a bypass unit in a metering pump of a hydraulic bypass type according to an embodiment of the present invention. FIG. 2 is a cross- FIG. 3 is a partially exploded perspective view showing a connection state of a liquid-receiving unit and a fluid delivery unit in a metering pump according to an embodiment of the present invention. FIG. 3 is a cross- FIG. 4 is a cross-sectional view illustrating a bypass unit in an embodiment of the present invention, and FIG. 5 is a view illustrating a combined state of a bypass unit in an embodiment of the present invention.

1 to 5, a hydraulic bypass type metering pump according to an embodiment of the present invention adjusts a discharge amount of a fluid by an operation in which operating fluid is bypassed, A pass unit 300, a liquid immersion unit 400, and a fluid transmission unit 500. [

Here, the hydraulic oil may be circulated by an operation bypassed in a hydraulic bypass type metering pump according to an embodiment of the present invention, or may be lubricated in a hydraulic bypass type metering pump according to an embodiment of the present invention have.

Further, the fluid is moved according to the operation of the metering pump of the hydraulic bypass type according to the embodiment of the present invention.

The driving unit 100 generates a pumping force by an applied power source.

The drive unit 100 may include a drive unit 100, an eccentric shaft portion 130, and an eccentric cam portion 140.

The driving unit 100 generates a pumping force by an applied power source. For example, the drive unit 100 may be constituted by a motor that generates a rotational force by an applied power source.

The eccentric shaft portion (130) supports the eccentric cam portion (140).

The drive shaft of the drive unit 100 and the eccentric shaft portion 130 may be perpendicular or mutually parallel.

The eccentric cam portion 140 is eccentrically mounted on the eccentric shaft portion 130 and eccentrically rotated by the above-described pumping force.

Then, the bypass unit 300 can be reciprocated by the eccentric rotation of the eccentric cam unit 140. [

For example, the eccentric cam portion 140 may be rotatably coupled to the eccentric shaft portion 130 and eccentrically rotated by a pumping force. As another example, the eccentric cam portion 140 can be eccentrically rotated through the eccentric shaft portion 130 fixed to the eccentric shaft portion 130 and rotated by the eccentric force.

The driving unit 100 may further include at least one of the deceleration unit 120, the connecting rod unit 150, and the supporting bearing unit 160. [

The deceleration section 120 is coupled to the drive unit 100 to regulate the pumping force. For example, the deceleration unit 120 may be a worm wheel gear that is coupled to the drive unit 100 to rotate the eccentric shaft 130 by adjusting the pumping force.

Here, the deceleration portion 120 is not limited, and it is possible to control the pumping force by being coupled to the drive unit 100 through known various types of gear engagement, engagement of a chain and a sprocket, engagement of a belt and a pulley,

The connection rod portion 150 is coupled to the eccentric cam portion 140 and is reciprocated according to the rotation of the eccentric cam portion 140.

According to a further configuration of the connection rod unit 150, the metering pump of the hydraulic bypass system according to an embodiment of the present invention may further include a transfer unit 200.

The transfer unit 200 connects the connection rod unit 150 and the bypass unit 300 and reciprocates the bypass unit 300 according to reciprocating movement of the connection rod unit 150.

The transmission unit 200 may include a fork portion 210 and a rod pin portion 220.

The fork portion 210 is fixed to the bypass unit 300 and the rod pin portion 220 rotatably couples the connecting rod portion 150 and the fork portion 210.

When the fork portion 210 is fixed to the connecting rod portion 150, the rod pin portion 220 can rotatably couple the fork portion 210 and the bypass unit 300.

Then, the transfer unit 200 can reciprocate the bypass unit 300 in a stable manner according to the reciprocating movement of the connection rod unit 150, absorbs the oscillation generated when the connection rod unit 150 reciprocates, Can be suppressed or prevented from being transmitted to the bypass unit (300).

The support bearing portion 160 rotatably supports the eccentric shaft portion 130 as the eccentric shaft portion 130 rotates. The support bearing portion 160 suppresses or prevents the eccentric shaft portion 130 from rocking and allows the eccentric shaft portion 130 to be stably rotated by the pumping force of the drive unit 100.

The components of the drive unit 100 described above are installed in the drive body unit 170. [

Here, the driving body portion 170 may be provided with a space in which the operating fluid can be received. At this time, a working oil charging unit 101 for opening and closing the space of the driving body unit 170 may be provided. In accordance with the opening / closing operation of the operating oil charging unit 101, the operating oil can be replenished into the space of the driving body unit 170 or the operating oil can be discharged from the space of the driving body unit 170.

For example, the space of the drive body portion 170 may be filled with operating fluid that is communicated with the bypass unit 300 and bypassed.

As another example, the hydraulic oil accommodated in the space of the drive body portion 170 can lubricate the elements of the drive unit 100 and the components of the bypass unit 300 smoothly.

The bypass unit (300) reciprocates the hydraulic oil by the pumping force of the drive unit (100).

The bypass unit 300 may include a driving rod portion 310, a piston portion 320, an opening / closing block portion 340, and an opening / closing control portion 350.

The driving rod unit 310 is reciprocally coupled to the driving unit 100 by a pumping force of the driving unit 100. The driving rod portion 310 may be coupled to the driving unit 100 through the above-described transmission unit 200. [

The piston portion 320 is coupled to the driving rod portion 310 to reciprocate the working oil.

Here, the piston 320 may be provided with a communication passage portion 321 communicating with the opening / closing control portion 350 to form a movement path of the hydraulic oil. For example, the communication passage portion 321 may be formed to pass through in a direction in which the piston portion 320 reciprocates.

The opening / closing block 340 supports the driving rod portion 310 or the piston portion 320 in a reciprocating manner.

The opening and closing control part 350 is provided in at least one of the driving rod part 310 and the piston part 320 to bypass the operating fluid according to the reciprocating movement of the driving rod part 310 and the piston part 320.

Then, the bypass passage is opened / closed by the opening / closing block 340 according to the reciprocating movement of the driving rod portion 310 and the piston portion 320, so that the amount of hydraulic oil can be controlled to be bypassed.

The opening / closing control part 350 may include a bypass flow path part 351 and a bypass part 353.

The bypass passage portion 351 is provided in the driving rod portion 310 or the piston portion 320 to communicate with the communication passage portion 321. The bypass flow path portion 351 forms a path through which the operating fluid is moved.

The bypass portion 353 is provided between the communication passage portion 321 and the bypass passage portion 351 to allow the communication passage portion 321 and the bypass passage portion 351 to communicate with each other. The bypass portion 353 changes the moving direction of the hydraulic oil in accordance with the reciprocating movement of the piston portion 320. [

The bypass portion 353 may include a communicating body portion 3531, a communication cap portion 3532, a guide pin portion 3534, a slider portion 3535, and an elastic supporting portion 3536.

The communicating body portion 3531 connects the communication flow path portion 321 and the bypass flow path portion 351 so that the operating fluid is moved in a hollow shape.

Here, the communicating body portion 3531 may be provided with a blocking protrusion 3537 for restricting the movement of the hydraulic fluid as the slider portion 3535 moves.

The communication cap portion 3532 is coupled to the communication body portion 3531. The pair of communication caps 3532 can be separated from each other and connected to the communication body 3531. Here, the communication cap portion 3532 may be formed with a communication hole portion 3533 through which the operating oil moves.

The guide pin portion 3534 is inserted into the communication body portion 3531 so that the operating oil can move. The guide pin portion 3534 is supported by the communication cap portion 3532 to prevent shaking, and does not interfere with the movement of the operating oil.

The slider 3535 moves along the guide pin portion 3534 in accordance with the movement of the operating oil to control the movement of the operating oil.

For example, when the slider 3535 is located on the blocking protrusion 3537, the movement of the hydraulic fluid is stopped, and when the slider 3535 is separated from the blocking protrusion 3537, the hydraulic fluid can be moved.

The elastic support portion 3536 elastically supports the slider portion 3535 corresponding to the movement of the operating oil. The resilient supporting portion 3536 can be elastically deformed by the force to which the operating oil is moved and can be contracted or expanded. When the operating oil is stopped, the elastic supporting portion 3536 can be returned to the home position.

The opening / closing part 350 may further include a fixing hole part 352.

The fixed hole portion 352 is provided with a bypass portion 353 by connecting the communication flow path portion 321 and the bypass flow path portion 351. The fixed hole portion 352 may be formed in at least one of the driving rod portion 310 and the piston portion 320 so as to communicate with the communication passage portion 321 and the bypass passage portion 351, respectively.

The bypass portion 353 is detachably fitted into the fixed hole portion 352, so that the bypass portion 353 can be easily replaced.

The bypass unit 300 may further include at least one of a cylinder unit 330 and a step adjustment unit 360.

The cylinder part (330) forms a reciprocating path of the piston part (320). As the cylinder part 330 is attached, the replacement of at least one of the cylinder part 330 and the piston part 320 can be facilitated. For example, at least one of the cylinder portion 330 and the piston portion 320 may be worn or damaged due to the reciprocating movement of the piston portion 320, and when the sealing ability is lowered, 330 and the piston 320 can be easily exchanged.

The step regulating unit 360 regulates the amount of operating fluid bypassed by the opening / closing regulator 350.

The step adjustment portion 360 may include an adjustment dial portion 361, an adjustment rod portion 362, and an adjustment guide portion 363.

The adjustment dial portion 361 identifies the amount of operating oil to be regulated. The adjustment rod portion 362 is moved by the adjustment dial portion 361. The adjustment guide portion 363 is provided in the opening and closing block 340 so that the opening and closing block 340 is moved in accordance with the movement of the adjustment rod portion 362.

Then, when the adjustment dial portion 361 is operated in accordance with the amount of the operating fluid to be bypassed, the adjustment rod portion 362 is moved to determine the position of the opening / closing block 340.

For example, when the adjustment dial portion 361 is rotated in the forward and reverse directions, the adjustment rod portion 362 is moved along the adjustment guide portion 363 while being extended or contracted by the adjustment dial portion 361, The opening / closing block 340 can be slidably moved along at least one of the driving rod portion 310 and the piston portion 320 by the spring 362.

Accordingly, the degree of opening of the bypass passage portion 351 can be adjusted in the entire stroke length due to the reciprocating movement of the piston portion 320, and the amount of the operating oil reciprocated in the bypass unit 300 can be adjusted. The amount of fluid transferred by the metering pump of the hydraulic bypass system according to an embodiment of the present invention can be adjusted according to the amount of the operating oil to be regulated.

The adjustment rod portion 362 is not limited to the coupling structure of the adjustment guide portion 363, but may be easily moved along the movement of the adjustment rod portion 362 through various known configurations. .

The step regulating unit 360 may further include an elastic regulating unit 364.

The elastic regulating portion 364 elastically supports the opening / closing block 340 in response to the movement of the regulating rod portion 362. The elastic regulating portion 364 can be elastically deformed and expanded or contracted by the force to which the regulating rod portion 362 is moved so that when the regulating rod portion 362 is stopped, And can support the opening / closing block 340.

The components of the bypass unit 300 described above are installed in the bypass body unit 370. The bypass body portion 370 may be provided with an operation flow path portion 371 in which the operating fluid moving to the adhesion unit 400 is received. The operating oil accommodated in the operating fluid passage 371 is moved to the side of the liquid-contacting unit 400 and also receives the working fluid on the side of the liquid-contact unit 400 in accordance with the reciprocating movement of the piston 320. [

Here, the bypass body portion 370 may be provided with a space separated from the operation flow path portion 371 to receive the operating fluid. The space of the driving body part 170 may be provided in the bypass body part 370. At this time, a separate charging unit (not shown) for opening and closing the space of the bypass body unit 370 may be provided. In accordance with the opening / closing operation of the separate charging unit (not shown), the operating fluid can be replenished into the space of the bypass body unit 370 or the operating fluid can be discharged from the space of the bypass body unit 370.

For example, the space of the bypass body unit 370 may be filled with operating fluid that is communicated with the bypass passage unit 371 to bypass the bypass passage unit 371.

As another example, the hydraulic fluid accommodated in the space of the bypass body unit 370 can be separated from the drive unit 100, thereby lubricating the operation of the components of the bypass unit 300.

Here, the relief portion 250 may be provided on the operation channel portion 371.

The relief portion 250 may return the operating fluid in response to the pressure generated by the movement of the operating fluid. The relief unit 250 can prevent or prevent breakage of the bypass unit 300 and protect the bypass unit 300 when overpressure is generated due to the movement of the operating oil.

The relief portion 250 is configured to apply the hydraulic oil accommodated in the operating passage portion 371 to the driving body portion (not shown) when the pressure acting on the operating passage portion 371 is equal to or higher than a predetermined pressure, 170 and the space of the bypass body unit 370. [0064] FIG.

The relief portion 250 may include a relief body portion 258, a relief valve portion 253, and a relief pressure portion 256.

The relief body portion 258 is coupled to the bypass body portion 370. The relief body 258 communicates with at least one of the space of the drive body 170 and the space of the bypass body 370 in a hollow form and communicates with the operation flow path 371.

Here, the relief portion 250 may further include a relief passage portion 251 and a return passage portion 252.

The relief channel portion 251 can communicate the relief body portion 258 and the operation channel portion 371.

The return flow path portion 252 can communicate at least one of the space of the drive body portion 170 and the space of the bypass body portion 370 with the relief body portion 258.

The relief valve portion 253 is provided in the relief body portion 258. The relief valve portion 253 restricts the movement of the hydraulic fluid between the relief passage portion 251 and the return passage portion 252. The relief valve portion 253 can restrict the movement of the operating oil by opening and closing the relief passage portion 251 and the return passage portion 252.

The relief pressure portion 256 presses the relief valve portion 253 at a preset pressure. The relief pressure portion 256 may be composed of an elastic spring having an elastic force corresponding to a predetermined pressure.

Then, the preset pressure in the relief part 250 can be set to 1.2 to 1.3 times the rated pressure.

The relief part 250 may further include at least one of a comb valve part 254 and a relief part 255. [

The comb valve portion 254 is coupled to the relief valve portion 253. Since the area ratio of the hydraulic valve unit 253 to the relief valve unit 253 is smaller than that of the relief valve unit 253 due to the pressing force of the hydraulic oil, It is possible to facilitate the opening and closing of the opening 252.

Then, the predetermined pressure in the relief portion 250 can be set to 1.05 to 1.1 times the rated pressure in accordance with the addition of the valve valve portion 254, thereby ensuring the power margin of the drive unit 100. [

The relief adjusting unit 255 can adjust the pressing force of the relief valve unit 253 at the relief pressure unit 256. [ For example, the relief adjuster 255 may be screwed to the relief body 258 to adjust the elastic force of the elastic spring.

The relief portion 250 may be formed of various known relief valves.

The liquid-contact unit (400) pumps the fluid by the operating fluid.

The fluid supply unit 400 may include a fluid chamber portion 410, a fluid chamber portion 430, and a diaphragm portion 420.

The operating oil chamber portion 410 communicates with the operating oil passage portion 371 of the bypass unit 300 to receive the operating oil.

The fluid chamber portion 430 receives the fluid to be transferred in accordance with the movement of the operating fluid.

The diaphragm unit 420 separates and separates the hydraulic oil chamber part 410 and the fluid chamber part 430 and is moved or elastically deformed according to the movement of the hydraulic oil.

The operating oil chamber unit 410 includes a first space 412 communicating with the operating oil passage 371 of the bypass unit 300 to receive operating oil and a second space 412 limiting the movement or elastic deformation of the diaphragm unit 420 And a first blocking portion 411 for blocking the first blocking portion 411.

The fluid chamber portion 430 includes a second space portion 432 communicating with the fluid transmission unit 500 to receive the fluid and a second blocking portion 431 for restricting movement or elastic deformation of the diaphragm portion 420 ).

The first and second blocking portions 411 and 431 can prevent or prevent the diaphragm portion 420 from being damaged due to the movement of the operating oil and protect the diaphragm portion 420.

The fluid is transferred to the fluid transfer unit 500 by the adhesion unit 400.

The fluid transfer unit 500 includes a suction channel part 520 for forming a path for fluid to be sucked into the fluid chamber part 430 of the liquid application unit 400, And a discharge channel portion 530 that forms a movement path of the discharged fluid.

The suction passage 521 of the suction passage portion 520 and the discharge passage 531 of the discharge passage portion 530 communicate with the second space portion 432 of the fluid chamber portion 430.

The suction passage portion 520 and the discharge passage portion 530 may include a check ball portion 542, a ball guide portion 543, a ball seat portion 544, and an elastic check portion 545.

The check ball 542 is movably coupled with the movement of the fluid.

The ball guide portion 543 forms a movement path of the check ball portion 542 so that the fluid can move.

The ball seat portion 544 restricts the movement path of the check ball portion 542 and opens and closes the ball guide portion 543.

The elastic check portion 545 elastically supports the check ball portion 542.

When the pressure of the second space portion 432 of the fluid chamber portion 430 becomes relatively high in accordance with the operation of the liquid-contact unit 400, the check ball portion 542 in the discharge path portion 530 is in contact with the ball seat portion 544 And is moved along the ball guide portion 543 in the state of being elastically supported by the elastic check portion 545 to open the ball guide portion 543.

When the pressure of the second space portion 432 of the fluid chamber portion 430 becomes relatively high in accordance with the operation of the liquid-contacting unit 400, the check ball portion 542 in the suction path portion 520 contacts the elastic check portion 545 The check ball portion 542 comes into contact with or comes into close contact with the ball seat portion 544 to close the ball guide portion 543.

Accordingly, the fluid is discharged from the second space portion 432 of the fluid chamber portion 430 through the discharge passage portion 530.

When the pressure of the second space portion 432 of the fluid chamber portion 430 is relatively lowered in accordance with the operation of the liquid-contacting unit 400, the check ball portion 542 in the suction passage portion 520 contacts the ball seat portion 544 And is moved along the ball guide portion 543 in the state of being elastically supported by the elastic check portion 545 to open the ball guide portion 543.

When the pressure of the second space portion 432 of the fluid chamber portion 430 is relatively lowered according to the operation of the liquid-contacting unit 400, the check ball portion 542 of the discharge path portion 530 is pressed against the elastic check portion 545 The check ball portion 542 comes into contact with or comes into close contact with the ball seat portion 544 to close the ball guide portion 543.

Accordingly, the fluid is received in the second space portion 432 of the fluid chamber portion 430 via the intake flow passage portion 520.

The suction passage portion 520 and the discharge passage portion 530 are connected to a fluid pipe (not shown) which forms a moving path of the fluid sucked into the fluid chamber portion 430 or discharged from the fluid chamber portion 430, And a joint portion 541 to which the joint portion 541 is coupled.

Hereinafter, the operation of the metering pump of the hydraulic bypass system according to the embodiment of the present invention will be described.

FIG. 6 is a view showing a discharge preparation state of a fluid according to an embodiment of the present invention, FIG. 7 is a view showing a discharge progression process of a fluid according to an embodiment of the present invention, and FIG. FIG. 9 is a view showing a suction progressing stroke of a fluid according to an embodiment of the present invention, and FIG. 10 is a view showing a state in which a fluid Fig.

6 to 10, in the hydraulic bypass type metering pump according to the embodiment of the present invention, when the bypass unit 300 is reciprocated in accordance with the operation of the drive unit 100, It is possible to move the fluid in the adhesion unit 400 and adjust the discharge amount of the fluid corresponding to the stroke length of the piston part 320. [

The control dial portion 361 is operated in accordance with the discharge amount of the fluid through the step regulating portion 360. [ In the embodiment of the present invention, the discharge of the fluid corresponding to 50% of the stroke length of the piston part 320 will be described.

6, the driving rod portion 310 and the piston portion 320 are moved to the side of the eccentric shaft portion 130 in the maximally moved state, and the driving unit 100 To the side of the liquid-adhesion unit 400. [

Here, when the driving rod portion 310 and the piston portion 320 move to the side of the liquid-contact unit 400, the distance between the driving rod portion 310 and the piston portion 320 becomes 50% or less of the stroke length of the piston portion 320 The operating oil accommodated in the operating oil passage portion 371 is moved by the slider portion 3535 of the bypass portion 353 because the bypass oil passage portion 351 is in the open state, And is discharged through the bypass passage portion 351 through the bypass passage portion 353.

The hydraulic fluid discharged from the bypass passage portion 351 is accommodated in at least one of the space of the driving body portion 170 and the space of the bypass body portion 370.

7, when the driving rod portion 310 and the piston portion 320 move to the side of the liquid-contacting unit 400, the driving rod portion 310 and the piston portion 320 exceed the 50% of the stroke length of the piston portion 320 or the stroke length of the piston portion 320 The operating fluid accommodated in the operating fluid passage portion 371 is supplied to the hydraulic oil chamber portion 410 of the adhering fluid unit 400 as the bypass flow passage portion 351 is closed by the opening / closing block portion 340 And is accommodated in the first space portion 412 of the working oil chamber portion 410.

The operating fluid is received in the first space portion 412 and the diaphragm portion 420 is moved toward the second space portion 432 or expanded toward the second space portion 432 side.

As a result, the second space portion 432 is relatively higher in pressure and the fluid contained in the second space portion 432 is discharged through the discharge passage portion 530 of the fluid transfer unit 500.

As shown in FIG. 8, when the driving rod portion 310 and the piston portion 320 move to the side of the liquid immersion unit 400 as much as possible, the discharge of the fluid stops.

The driving rod portion 310 and the piston portion 320 are moved to the side of the liquid-contacting unit 400 as much as possible, Is moved toward the eccentric shaft portion 130 in accordance with the operation of the drive unit 100. [

9, when the driving rod portion 310 and the piston portion 320 are moved toward the eccentric shaft portion 130 and less than 50% of the stroke length of the piston portion 320 or the stroke length of the piston portion 320 The operating fluid accommodated in the first space portion 412 of the operating chamber portion 410 is supplied to the working fluid passage portion 351 through the opening and closing block portion 340, 371).

The operating oil accommodated in the first space 412 is moved to the operating passage 371 so that the diaphragm 420 is moved toward the first space 412 or expanded toward the first space 412.

Accordingly, the pressure of the second space portion 432 is relatively low, and the fluid is sucked through the suction passage portion 520 of the fluid delivery unit 500 and is received in the second space portion 432.

10, when the driving rod portion 310 and the piston portion 320 are moved toward the eccentric shaft portion 130, the moving distance of the piston portion 320 exceeds 50% of the stroke length of the piston portion 320 or the stroke length of the piston portion 320 The bypass passage portion 351 is opened by the opening and closing block portion 340 so that the slider portion 3535 of the bypass portion 353 is moved so that the space of the drive body portion 170 The operating oil accommodated in at least one of the bypass passage 351 and the bypass body portion 370 is accommodated in the operation passage portion 371 via the bypass passage portion 351, the bypass portion 353 and the communication passage portion 321 .

The driving rod portion 310 and the piston portion 320 are moved to the side of the eccentric shaft portion 130 to the side of the adhering liquid unit 400 according to the operation of the driving unit 100.

When the bypass passage portion 351 is opened in the above-described discharge stroke of the fluid and the suction stroke of the fluid, the diaphragm portion 420 of the adhesion unit 400 is not moved or deformed, so that the fluid can be stopped .

According to the above-described metering pump of the hydraulic bypass method, it is possible to prevent overflow of the working oil through the bypass unit during the suction stroke, to prevent the loss of the stroke length due to the clearance of the piston, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

100: drive unit 101:
110: driving part 120:
130: eccentric shaft portion 140: eccentric cam portion
150: connecting rod portion 160: supporting bearing portion
170: driving body part 200: transmitting unit
210: fork portion 220: rod pin portion
250: relief portion 251: relief flow portion
252: return flow path portion 253: relief valve portion
254: a joint valve part 255: a relief adjusting part
256: relief pressure portion 258: relief body portion
300: Bypass unit 310: Drive rod unit
320: piston part 321:
330: cylinder part 340: opening / closing block part
350: opening / closing control section 351: bypass passage section
352: fixed hole portion 353: bypass portion
3531: communicating body part 3532: communicating cap part
3533: communication hole portion 3534: guide pin portion
3535: Slider part 3536:
3537: blocking protrusion 360: step adjustment section
361: Adjusting dial section 362: Adjusting rod section
363: adjusting guide portion 364: elasticity adjusting portion
370: bypass body part 371:
400: adhering unit 410: hydraulic oil chamber part
411: first blocking portion 412: first space portion
420: diaphragm part 430: fluid chamber part
431: second blocking portion 432: second space portion
500: fluid delivery unit 520:
521: Suction flow path 530:
531: exhaust passage 541: joint part
542: check ball portion 543: ball guide portion
544: ball seat portion 545: elastic check portion

Claims (10)

A driving unit for generating a pumping force by an applied power source;
A bypass unit for reciprocating the hydraulic fluid by a pumping force of the drive unit;
A fluid supply unit for pumping fluid by the operating fluid; And
A fluid delivery unit through which the fluid is delivered by the liquid-contact unit; / RTI >
The bypass unit includes:
A driving rod unit reciprocally coupled to the driving unit by the pumping force;
A piston portion coupled to the driving rod portion and reciprocating the working oil;
An opening / closing block for reciprocally supporting the driving rod portion or the piston portion; And
An opening / closing control unit provided in at least one of the driving rod unit and the piston unit to bypass the operating oil according to the reciprocating motion of the driving rod unit or the piston unit; Lt; / RTI >
In the piston portion,
A communication passage portion communicating with the opening / closing control portion to form a moving path of the operating oil; Wherein the pump is a hydraulic pump.
delete The method according to claim 1,
The opening /
A bypass passage portion provided in the driving rod portion or the piston portion to communicate with the communication passage portion; And
A bypass portion provided between the communication passage portion and the bypass passage portion for changing a moving direction of the hydraulic oil according to the reciprocating movement of the piston portion; Wherein the pump is a hydraulic pump.
The method of claim 3,
The opening /
A fixing hole portion connecting the communication passage portion and the bypass passage portion to the bypass portion; Further comprising: a pump for supplying the hydraulic fluid to the metering pump.
The method of claim 3,
The bypass unit includes:
A hollow communicating body portion connecting the communication passage portion and the bypass passage portion to move the operating oil;
A communication cap portion coupled to the communication body portion and having a communication hole portion through which the operating oil moves;
A guide pin portion inserted into the communicating body portion such that the operating fluid is movably supported and supported by the communication cap portion;
A slider part moving along the guide pin part according to the movement of the operating oil to control the movement of the operating oil; And
An elastic support portion for elastically supporting the slider portion corresponding to the movement of the operating oil; Further comprising: a pump for supplying the hydraulic fluid to the metering pump.
6. The method of claim 5,
In the communicating body portion,
A blocking protrusion for restricting movement of the hydraulic fluid in accordance with the movement of the slider; Wherein the pump is a hydraulic pump.
7. The method according to any one of claims 1 to 6,
The bypass unit includes:
A cylinder portion forming a reciprocating path of the piston portion; Further comprising: a pump for supplying the hydraulic fluid to the metering pump.
7. The method according to any one of claims 1 to 6,
The bypass unit includes:
A step regulating unit for regulating the amount of the hydraulic fluid bypassed by the opening / closing control unit; Further comprising: a pump for supplying the hydraulic fluid to the metering pump.
9. The method of claim 8,
The step-
An adjusting dial portion for distinguishing the amount of the operating oil to be adjusted;
An adjustment rod portion moved by the adjustment dial portion; And
An inclined guide portion provided on the opening / closing block to move the opening / closing block according to movement of the adjusting rod; Wherein the pump is a hydraulic pump.
10. The method of claim 9,
The step-
An elastic regulating unit elastically supporting the opening / closing block in response to movement of the regulating rod; Further comprising: a pump for supplying the hydraulic fluid to the metering pump.

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