KR102597004B1 - Expansion cylinder valve - Google Patents

Abstract

The present invention relates to an expansion cylinder valve, which can open or close a flow path while operating at a small torque by minimizing frictional resistance, and can maintain a held state by a strong pressing force after being set to open or close the flow path. The purpose is to
The expansion cylinder valve according to the present invention includes a main body portion in which several channels are formed; an opening/closing unit disposed at a branch point of the flow path and opening or closing the flow path through a rotational operation; and a control unit selectively in close contact with the opening and closing unit to allow or limit the rotational operation of the opening and closing unit.

Description

Expansion cylinder valve{EXPANSION CYLINDER VALVE}

The present invention relates to an expansion cylinder valve, and more specifically, it can open or close a flow path while operating at a small torque by minimizing frictional resistance, and after being set to open or close the flow path, it is held by a strong pressing force. It relates to an expansion cylinder valve that can maintain .

Generally, expansion cylinder valves are installed on pipes that transport fluids and gases in various industrial fields.

This expansion cylinder valve is largely composed of a main body with a passage through which fluid and gas can flow in one direction, and an open/close valve section that opens or closes the fluid passage in the main body, and one end of the open/close valve section automatically opens and closes. An actuator that can open or close the valve by rotating it is installed.

This expansion cylinder valve controls the flow rate or hydraulic pressure of fluid, gas, or powder by opening and closing the pipe by rotating the opening and closing valve part provided in the main body with a driver.

At this time, the expansion cylinder valve opens and closes simply as the opening and closing valve part rotates about the center line, so the operation is fast and it is widely applied to low or high pressure water, steam, air, and gas.

However, typically, the expansion cylinder valve closes the passage by rotating while the opening/closing valve part is in contact with the main body part, and at this time, the greatest torque is generated.

In addition, a large torque is generated in the opening/closing valve section due to the strong pressure present in the main body section.

In addition, when the fluid has a powdery nature containing particles, a certain amount of powdery fluid is stuck to the inner surface of the main body, so when the opening and closing valve part rotates to open and close, a large frictional resistance is generated by the stuck fluid A large torque is required for opening and closing operations.

Therefore, there is an urgent need to develop an expansion cylinder valve that can reduce the capacity of the actuator by minimizing all resistance generated during the opening and closing operation of the opening and closing valve unit, and that can be opened and closed with minimal friction resistance.

Registered Patent Publication No. 10-2128375 (2020.06.24.)

The present invention was developed to solve the problems of the prior art described above. It is possible to open or close the flow path while operating at a small torque by minimizing friction resistance, and after being set to open or close the flow path, it is held by contact. The purpose is to provide an expansion cylinder valve that can be maintained in a held state by pressure or strong pressure.

Additionally, the purpose is to provide an expansion cylinder valve that can expand the number of passages up to five.

An expansion cylinder valve according to an embodiment of the present invention includes a main body in which several channels are formed; an opening/closing unit disposed at a branch point of the flow path and opening or closing the flow path through a rotational operation; and a control unit selectively in close contact with the opening and closing unit to allow or limit the rotational operation of the opening and closing unit.

In addition, the control unit includes: an operation limiter disposed on the main body at a predetermined distance from each other and moved in a direction in close contact with or away from the outer surface of the opening and closing unit; and a variable part that is applied to the operation limiting part, respectively, and separates the operation limiting part from the opening and closing part by expansion and contraction, or causes the operation limiting part to come into close contact with the opening and closing part.

In addition, it further includes an elastic support part that elastically supports the operation limiting part and brings the operation limiting part into close contact with the outer surface of the opening and closing part when the variable part contracts.

And, it further includes a supply and discharge part that supplies air to the variable part or discharges the supplied air, and the supply and discharge part includes a main supply pipe disposed on one side of the main body part; Branch pipes connected to the main supply pipe at regular intervals and each embedded in the main body portion; A connector coupled to the main body and connected to the branch pipe, a transfer pipe for transporting air injected through the connector, and connected to an inlet pipe formed on one side of the variable portion to inject or discharge air into the variable portion. It includes a coupler including a supply discharge pipe.

The expansion cylinder valve according to the present invention can open or close the flow path while operating at a small torque by minimizing friction resistance, and after being set to open or close the flow path, it can be held in a holding state by contact or by a strong pressing force. There is an effect of improving the reliability of the product by maintaining the state and preventing the transfer direction of the conveyed object to be transferred through the flow path from being unintentionally changed.

Additionally, it has the effect of expanding the number of euros up to 5.

1 and 2 are perspective views showing an expansion cylinder valve according to an embodiment of the present invention.
Figures 3 and 4 are perspective views showing the coupling relationship between the supply/discharge part and the variable part applied to the expansion cylinder valve according to an embodiment of the present invention.
Figure 5 is a cross-sectional view showing a state before expansion of the variable part applied to the expansion cylinder valve according to an embodiment of the present invention.
Figure 6 is a cross-sectional view showing a state in which the variable part applied to the expansion cylinder valve according to an embodiment of the present invention is expanded and the operation limiting part is spaced apart from the opening and closing part.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to be understood by those skilled in the art. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Throughout the specification, similar parts are given the same reference numerals.

Figures 1 and 2 are perspective views showing an expansion cylinder valve according to an embodiment of the present invention, and Figures 3 and 4 are a coupling relationship between the supply discharge part and the variable part applied to the expansion cylinder valve according to an embodiment of the present invention. It is a perspective view to show, Figure 5 is a cross-sectional view showing the pre-expansion state of the variable part applied to the expansion cylinder valve according to an embodiment of the present invention, and Figure 6 is a cross-sectional view showing the state before expansion of the variable part applied to the expansion cylinder valve according to an embodiment of the present invention. This is a cross-sectional view showing a state in which the variable part is expanded and the operation limiter part is spaced apart from the opening and closing part.

The expansion cylinder valve (1) according to an embodiment of the present invention may include at least one of a main body portion (10), an opening and closing portion (20), a control portion (30), and a supply/discharge portion (50). , 3WAY, 4WAY valve, etc.

The main body 10 may be installed between conduits of fluid lines.

Inside the main body 10, passages 11a and 12a are formed to allow liquid or fluid conveyed material to pass through.

Although the drawing shows an example in which the main body 10 is formed in a square box shape, the present invention is not limited thereto. It is revealed that in the expansion cylinder valve according to an embodiment of the present invention, the main body portion 10 can be changed to a rectangular shape or other various shapes.

A plurality of branch pipes 52 (11, 12) can be applied, and an example of four branches is shown in the drawing.

In addition, the branch pipes 52 (11, 12) are arranged to be spaced apart from each other at regular intervals in order to transfer the conveyed material to other pipes. In addition, the branch pipes 52 (11, 12) have a shape extending in the same direction or in different directions on the main body 10.

The drawing shows an example where the branch pipes 52 and 11 are installed through the left side of the main body, and the branch pipes 52 and 12 are respectively installed through the top, bottom and front of the main body 10. .

A certain area of the branch pipes 52 (11, 12) is accommodated inside the main body, and the remaining area protrudes to the outside of the main body.

The branch pipes 52 (11, 12) are each connected to different pipes. For this purpose, flanges 11a and 12a, respectively bolted to the pipes, are formed at the ends of the protruding areas of the branch pipes 52 (11 and 12).

And, flow paths 11a and 12a connected to the inner space of the main body 10 are formed inside the branch pipes 52 (11 and 12), respectively.

At this time, the number and position of the branch pipes 52 (11, 12) in the expansion cylinder valve 1 according to an embodiment of the present invention are not limited, and may be selectively changed in various ways depending on the purpose.

In addition, one branch pipe (52) (11) is used to transfer the conveyed material to the inner space of the opening and closing unit (20), which will be described later, and the remaining three branch pipes (52) (12) are used to transfer the conveyed material to other pipes. It can be used for delivery purposes.

That is, the branch pipes 52 (11, 12) are divided into a branch pipe 52 (11) for transfer and a branch pipe 12 for delivery, and the branch pipe 52 (11) for transfer includes a control unit (described later) 30) is not applied, and the control unit 30 is applied only to the three delivery branch pipes 12.

Meanwhile, the opening and closing unit 20 is disposed in the internal space of the main body 10 to selectively open or close the passages 10a of the branch pipes 12 for transmission.

The opening and closing portion 20 may be formed in a substantially spherical shape or a sphere-like shape, as shown in FIG. 1 .

The opening and closing portion 20 is formed in a cylindrical shape with a first open hole 20a formed on one side facing the branch pipe 52 (11) for transfer and an empty space formed inside.

In addition, a second opening hole 20b is formed in the opening/closing part 20 to open the passage 10a.

At this time, the blocking surface 22 in which the first open hole 20a and the second open hole 20b are not formed among the opening and closing portions 20 protrudes in the outer direction of the opening and closing portion 20 and functions to close the passage 10a. Perform.

And, packing (P) is installed on the circumferential surface of the first open hole (20a) to maintain airtightness. In addition, packing (P) for maintaining airtightness is also installed on the circumferential surface of the blocking surface (22).

The packing (P) prevents the outflow of air for operating the conveyed material and the variable part 32, which will be described later.

Based on the figure, the first open hole 20a is formed on the left side of the opening and closing part 20 and faces the flow path 1 of the branch pipe 52 (11) for transfer.

And, the second open hole 20b is formed on the upper surface of the opening and closing part 20 and faces the flow path 12b of the branch pipe for transmission 12 located on the upper side.

A rotating shaft 21 is formed on the other side of the opening and closing part 20 and protrudes outward through the main body 10. The rotation shaft 21 is connected to a driving source such as a motor.

The opening and closing part 20 opens or closes the flow path 10a of the branch pipe 12 for transmission while rotating in the forward or reverse direction at an angle of 180 to 360 degrees in place with the power of the driving source.

The opening/closing unit 20 opens or closes the flow path 12b of the branch pipe 12 for transmission while being rotated at a predetermined angle in the forward or reverse direction in place by the operation of the driving source.

At this time, the second open hole (20b) is a flow path (12b) of any one of the transmission branch pipes (12) installed through the upper, lower, and front surfaces of the main body (10), respectively, depending on the rotation angle of the opening and closing portion (20). ), and the first open hole (20a) always faces the flow path (11b) of the transfer branch pipe (52) (11) no matter which direction the opening and closing part (20) is rotated.

And, the blocking surface 22 is configured to close only the two delivery branch pipes 12.

As the opening/closing unit 20 rotates, when the second open hole 20b faces any one branch pipe 12 for delivery, the passage 12b is opened and the conveyed material is transferred to another pipe through the corresponding passage 12b. do.

And, as the opening and closing part 20 rotates, the second open hole 20b does not face the branch pipe 12 for transmission, and the blocked surface 22 on which the open hole 20a is not formed is connected to the flow path 12b. When facing each other, the flow path (12b) is closed and the transported material is not transferred to another pipe through the corresponding flow path (12b).

Specifically, in the state shown in FIG. 5, the blocking surface 22 of the opening and closing portion 20 is connected to the transmission branch pipe 12 located on the front of the main body 10 and the transmission branch pipe 12 located on the bottom of the main body 10. The flow path 12b of the branch pipe 12 is closed, and the second open hole 20b faces the flow path 12b of the branch pipe 12 for transmission located on the upper side.

Therefore, when the conveyed material is input into the branch pipe 52 (11) for transfer, the conveyed material passes through the empty space of the opening and closing part 20 and passes through the flow path 12b of the branch pipe 12 for transfer located on the upper side. transported to the pipeline.

In addition, when the opening and closing part 20 is rotated at an angle of 90 degrees toward the front of the main body 10 in the state shown in Figure 5, the second open hole 20b is a transmission branch pipe located on the front of the main body 10 ( It faces the flow path (12b) of 12).

Accordingly, the transferred material is transferred to another pipe through the flow path 12b of the branch pipe 12 for delivery located at the front.

In addition, when the opening and closing part 20 is rotated at an angle of 180 degrees in the direction of the bottom of the main body 10 in the state shown in FIG. 5, the second open hole 20b is a transmission branch pipe located on the bottom of the main body 10 ( It faces the flow path (12b) of 12).

Accordingly, the transferred material is transferred to another pipe through the flow path 12b of the branch pipe 12 for delivery located at the front.

Meanwhile, the control unit 30 is configured to selectively restrain the opening and closing unit 20 to allow or limit the rotational operation of the opening and closing unit 20.

After rotating the opening and closing unit 20 by a predetermined angle in one direction and setting the second opening hole 20b to open the passage 12b of the second transmission branch pipe 12 located on the upper side, the opening and closing unit 20 When rotated, the direction of flow of the transported material changes, which causes the problem of the transported material leaking through the second pipe (P1) or the second pipe (P2) as intended.

To prevent this, the control unit 30 selectively holds the opening/closing unit 20 so that the transported material is transferred only to the set pipe.

To this end, the control unit 30 may include at least one of an operation limiting unit 31 and a variable unit 32.

The operation limiting unit 31 is configured to restrain or release the opening/closing unit 20.

The operation limiting parts 31 are each accommodated in the internal space of the main body 10 where the branch pipe 12 for transmission is installed. Accordingly, the operation limiting portion 31 is disposed on the upper, lower, and front sides of the main body portion 10, respectively.

The operation limiter 31 is formed in a substantially cylindrical shape and is arranged to surround the periphery of the branch pipe 12 for transmission.

At this time, the inner surface of the operation limiting part 31 may be spaced apart from the outer surface of the delivery branch pipe 12 at a predetermined distance.

The operation limiter 31 applied to the transmission branch pipe 12 located on the upper and lower sides of the main body 10 is operated to lift and lower with respect to the opening and closing part 20 and is in close contact with or spaced apart from the opening and closing part 20. The operation limiter applied to the branch pipe for transmission (12) located on the front side of (10) moves forward or backward with respect to the opening and closing unit and is in close contact with or spaced apart from the opening and closing unit (20).

Hereinafter, with reference to FIGS. 5 and 6 , an example in which the operation limiter 31 is in close contact with or spaced apart from the opening and closing unit 20 that is operated to be raised and lowered with respect to the opening and closing unit 20 will be described.

The operation limiting part 31 is lowered or raised by the contraction and expansion of the variable part 32 in the internal space of the main body 10.

Based on FIG. 5, the operation limiter 31 located on the upper side of the main body 10 holds the opening and closing unit 20 by pressing the packing (P) mounted on the opening and closing unit 20 when lowered, and when raised, is spaced apart from the packing (P) and does not hold the opening/closing part (20).

In addition, the operation limiter 31 located on the lower side of the main body 10 holds the opening and closing unit 20 by pressing the packing (P) mounted on the opening and closing unit 20 when raised, and when lowered, the packing (P) is held on the opening and closing unit 20. It is separated from P) and does not hold the opening/closing part (20).

In addition, the operation limiter 31 located on the front of the main body 10 holds the opening and closing unit 20 by pressing the packing (P) mounted on the opening and closing unit 20 when advanced, and when moving backward, the packing (P) is held. It is separated from P) and does not hold the opening/closing part (20).

At this time, in the expansion cylinder valve according to an embodiment of the present invention, the operation limiting part 31 may be configured to contact or be spaced apart from the outer surface of the opening and closing part 20 instead of the packing P.

The operation limiting part 31 is formed with a pressure surface part 311 having an inclined shape at one end to expand the contact area with the packing P and enable stable pressure.

At this time, when the opening and closing part 20 is rotated, the packing P may be designed to naturally push the pressure surface part 311 apart.

Specifically, when the opening/closing part 20 is rotated and the packing P pushes the pressure surface part 311, the operation limiting part 31 located on the upper side of the main body part 10 rises and moves to the lower side of the main body part 10. The operation limiter 31 located at is lowered.

A contact portion 312 that contacts the variable portion 32, which will be described later, is formed on the outer periphery of the operation limiting portion 31.

The contact portion 312 may be formed along the circumference of the operation limiting portion 31.

5 and 6, the contact portion 312 of the operation limiting portion 31 located on the upper side of the main body portion 10 is seated on the upper surface of the variable portion 32 and is located on the lower side of the main body portion 10. The contact portion 312 of the positioned operation limiting portion 31 forms a structure that supports the bottom surface of the variable portion 32.

With this structure, when the variable portion 32 is contracted and expanded, the operation limiting portion 31 located on the upper and lower sides of the main body 10 is raised or lowered, respectively.

The operation limiting part 31 faces or is offset from the second open hole 20b depending on the rotation direction or rotation angle of the opening and closing part 20.

Meanwhile, the variable part 32 is accommodated in the pocket part 13 installed in the internal space of the main body part 10.

The pocket portion 13 may be formed in a ring shape to surround the outer periphery of the operation limiting portion 31.

The variable portion 32 may be formed in a ring shape to be accommodated in the pocket portion 13.

The variable portion 32 may be formed of the same material as known packing to maintain airtightness.

The variable portion 32 has an empty space inside which air is accommodated.

On one side of the variable portion 32, an inlet pipe 321 through which air enters and exits is formed.

As shown in FIG. 4, the entrance pipe 321 penetrates the main body 10 and is exposed to the outside.

At this time, the entrance pipe 321 may be simply exposed or a certain area may protrude to the outside of the main body 10.

A supply and discharge unit 50 is connected to the entrance pipe 321 to supply air to the inside of the variable part 32 or to discharge the air supplied to the inside of the variable part 32.

The supply discharge unit 50 may include at least one of the main supply pipe 51, the branch pipe 52, and the coupler 53.

The main supply pipe 51 is disposed on one side of the main body.

The main supply pipe 51 may be formed in a substantially rectangular frame shape.

The main supply pipe 51 can simultaneously supply air to the branch pipes 52.

The branch pipes 52 are connected to the main supply pipe 51 at regular intervals from each other, and are respectively embedded within the main body.

The upper side of the branch pipe 52 is bent at a right angle to form an approximately 'L' cross-sectional shape, and due to this shape, it can be connected to the coupler 53.

At this time, the drawing illustrates an example in which three branch pipes 52 for transmission are applied, and three operation limiters and variable parts are applied to each side of the branch pipe 52 for transmission. It is applied in 3 degrees.

In addition, the air supplied to the main supply pipe 51 is branched through each branch pipe 52, and the branch pipe 52 delivers air to the coupler 53, and the coupler 53 is connected to the entrance pipe 321. Air is injected into the interior of the variable part 32 through .

The coupler 53 is configured to supply air located inside the branch pipes 52 to the variable unit.

The couplers 53 are applied in the same number as the variable portion. In the above description, an example in which three variable parts are applied is described, and three couplers 53 are also applied.

Couplers 53 are each coupled to the outer surface of the main body 10.

The coupler 53 may be detachably coupled to the main body 10 through a bolt or piece.

As shown in FIG. 3, the coupler 53 includes a connector 53a connected to the bent portion of the branch pipe 52, a transfer pipe 531 for transferring air injected through the connector 53a, and It may include at least one of the supply and discharge pipes 532 connected to the inlet pipe 321 of the variable portion 32.

Therefore, when air is injected by connecting an air pump or air compressor to the supply line 511 of the main supply pipe 51, the air is branched to the branch pipes 52 through the main supply pipe 51, and the branch pipes 52 ) is injected into the inside of the variable portion 32 by sequentially passing through the connector 53a, the transfer pipe 531, the supply discharge pipe 532, and the entrance pipe. As a result, the variable portion 32 expands to a certain volume.

And, when air is sucked through an air pump or air compressor, the air in the variable part 32 is discharged through the inlet pipe, the supply and discharge pipe 532, the transfer pipe 531, the connector 53a, and the branch pipe 52. ), the main supply pipe 51, and the supply line 511 sequentially and are discharged. As a result, the variable portion 32 is restored to its original size.

With this configuration, when air is injected into the variable portion 32 while the operation limiting portion 31 is pressing the packing P, the variable portion 32 is expanded.

Accordingly, the operation limiting part 31 located on the upper side of the main body 10 is raised and spaced apart from the opening and closing part 20, and the operation limiting part 31 located on the lower side of the main body 10 is lowered and the opening and closing part ( 20), and the operation limiting part 31 located on the front side of the main body 10 is advanced and spaced apart from the packing P.

Then, when air is discharged from the variable part 32, the variable part 32 is restored to its original size by contraction.

Accordingly, the operation limiting part 31 located on the upper side of the main body 10 is returned by being lowered by the elastic support part 40 to press the upper surface of the packing P, and is located on the lower side of the main body 10. The operation limiter 31 returns by rising and presses the bottom of the packing (P), and the operation limiter 31 located on the front side of the main body 10 returns by reversing to press the packing (P). Pressurize.

This return operation of the operation limiter 31 may be performed on the elastic support portion 40.

The elastic support portion 40 elastically supports the contact portion 312 while being accommodated in the inner space of the contact portion 312. In addition, the elastic support portion 40 is supported on the blocking plate 121 mounted on the peripheral surface of the branch pipe 12 for transmission.

The blocking plate 121 may be formed integrally with the branch pipe 12 for transmission.

An installation hole for installing the branch pipe 12 for transmission is formed in the main body 10. When the branch pipe 12 for transmission is placed in the main body 10, the blocking plate 121 is formed in the main body 10. ) supports the elastic support portion 40 while being supported on the step 10a.

Accordingly, the elastic support part 40 is supported between the blocking plate 121 and the contact part 312, and is compressed and expanded in response to the compression and expansion of the variable part 32.

The elastic support portion 40 may be formed of a wave spring.

When the variable part 32 is expanded by air injection, the elastic support part 40 is pressed against the contact part 312 and contracts to a certain level. And, when the variable part 32 is contracted by air discharge, the elastic support part 40 is restored to its original state by its own elastic force and pushes the operation limiting part 31 to its original position.

Next, the operation of the expansion cylinder valve 1 according to an embodiment of the present invention described above and the unique effects that appear during the process will be described.

When the opening and closing unit 20 maintains the state shown in FIG. 5, the transfer material transferred to the empty space (S) of the opening and closing unit 20 through the branch pipes 52 and 11 for transfer is transferred to the delivery branch located on the upper side. It is transferred to the first pipe (P1) through the organ (12).

At this time, since the elastic support parts 40 push the operation limiting parts 31 while the variable parts 32 are each contracted, the operation limiting parts 31 are packed (packed) by the pushing force of the elastic supporting parts 40. P) is pressed with strong force to hold the opening and closing portion (20). As a result, the opening and closing part 20 is not rotated by the pressing force of the operation limiting part 31 and remains stably held.

Accordingly, the conveyed material is transported only to the first pipe (P1) through the branch pipes (52) (12).

In addition, when it is desired to change the direction of transport of the transported object, the opening and closing part 20 must be rotated at a predetermined angle using a driving source so that the second open hole 20b faces another pipe.

At this time, since the operation limiting unit 31 is pressing the opening/closing unit 20 with a strong pressing force, the pressing force of the operation limiting unit 31 on the opening/closing unit 20 must be temporarily extinguished.

To this end, when air is injected into each variable part 32 through the supply and discharge part 50, the operation limiting part 31 pressing the packing P on the upper side of the main body 10 is raised, The other operation limiting part 31 pressing the other packing P on the lower side of the main body 10 is lowered and spaced apart from the opening/closing part 20 by a predetermined distance.

In addition, the other operation limiting part 31 pressing the other packing P on the front side of the main body 10 is advanced and spaced apart from the opening and closing part 20 by a predetermined distance.

In addition, the operation limiters 31 respectively rise, fall, and advance to pressurize the elastic supports 40 and compress them to a certain level.

As the operation limiting parts 31 are spaced apart from the opening/closing unit 20, the pressing force is released, and the opening/closing unit 20 is temporarily in a state in which it can rotate smoothly.

Therefore, the transport direction of the transported object can be selectively changed by rotating the opening/closing unit 20 in the desired direction and angle through the driving source.

Depending on the rotation direction or angle of the opening and closing unit 20, the second open hole 20b faces one of the branch pipes 12 for transmission, and the rotation direction or angle of the opening and closing unit 20 is controlled through the drive source. You can change the direction of transport of the transported object by selectively changing it.

Meanwhile, after changing the transport direction of the transported object in this way, the opening and closing unit 20 must be held again to prevent the phenomenon in which the transport direction of the transferred object is arbitrarily changed.

To this end, when air is discharged from the inside of each variable part 32, the variable part 32 is contracted and restored to its original state, and the elastic support part 40 is automatically restored to its original state by its own elastic force, and the main body part 10 The operation limiters 31 located on the upper, lower, and front sides of the pressurize the packing (P) while descending, rising, and reversing, respectively.

In the end, by pressurizing and stably holding the opening/closing unit 20 in a state in which the operation limiting parts 31 are evenly distributed, it is possible to prevent the opening/closing unit 20 from arbitrarily rotating when the transport direction of the conveyed object is changed.

As described above, the expansion cylinder valve 1 according to an embodiment of the present invention operates the opening and closing part 20 to change the transport direction of the conveyed object, and the packing (P) is operated through the variable part 32. By temporarily releasing the pressing force of the operation limiter 31 on the opening/closing unit 20 by separating the operation limiting unit 31 from the opening/closing unit 20, the frictional resistance received when the opening/closing unit 20 operates can be minimized. As a result, it is possible to operate the opening/closing unit 20 at a small torque, thereby preventing wear and tear on the opening/closing unit 20.

In addition, after the opening/closing unit 20 is set to open one of the flow paths 12b, it is maintained in a held state by the strong pressing force of the operation limiting part 31, so that the transfer direction of the conveyed object to be transported through the flow path is maintained. By preventing unwanted changes, product reliability can be improved.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the scope of the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. must be interpreted.

1: Expansion cylinder valve 10: Main body part
10a: Step 11: Branch pipe for transfer
11a, 12a: Flange 11b, 12b: Euro
12: Branch pipe for transmission 13: Pocket part
131: step portion 20: opening and closing portion
20a: first open hole 20b: second open hole
20c: Mounting groove 21: Rotation axis
22: blockage surface 30: control unit
31: operation limiting part 311: pressurizing surface part
312: contact part 313: blocking plate
32: variable part 40: elastic support part
50: supply discharge unit 51: main supply pipe
511: supply line 52: branch pipe
53: Coupler 53a: Connector
531: transfer pipe 532: supply discharge pipe
P1, P2: Pipeline

Claims (4)

A main body in which several channels are formed;
an opening/closing unit disposed at a branch point of the flow path and opening or closing the flow path through a rotational operation; and
It includes a control unit selectively in close contact with the opening and closing unit to allow or limit the rotational operation of the opening and closing unit,
The control unit,
An operation limiter disposed on the main body to be spaced apart from each other at a predetermined distance and moved in a direction in contact with or away from an outer surface of the opening and closing unit; and
Each of the operation limiters is applied to the operation limiter, and includes a variable part that separates the operation limiter from the opening and closing part by expansion and contraction, or causes the operation limiter to come into close contact with the opening and closing part,
It further includes a supply/discharge unit that supplies air to the variable unit or discharges the supplied air,
The supply discharge unit,
a main supply pipe disposed on one side of the main body;
Branch pipes connected to the main supply pipe at regular intervals and each embedded in the main body portion;
A connector coupled to the main body and connected to the branch pipe, a transfer pipe for transporting air injected through the connector, and connected to an inlet pipe formed on one side of the variable portion to inject or discharge air into the variable portion. An expansion cylinder valve including a coupler including a supply discharge pipe.
delete According to paragraph 1,
An expansion cylinder valve further comprising an elastic support part that elastically supports the operation limiting part and brings the operation limiting part into close contact with the outer surface of the opening and closing part when the variable part contracts.
delete

Images