KR20110130280A

KR20110130280A - Flow switch

Info

Publication number: KR20110130280A
Application number: KR1020100049847A
Authority: KR
Inventors: 임덕정
Original assignee: 임덕정
Priority date: 2010-05-27
Filing date: 2010-05-27
Publication date: 2011-12-05

Abstract

PURPOSE: A flow switch is provided to safely and exactly driving the operation of a system according to fluid flow in a conduit line. CONSTITUTION: A body part(16) is formed into a pipe shape with a predetermined length and diameter. A screw part(14) is formed on the outer circumference or the inner circumference of the both ends of the body part for being bonded with a conduit line(12). A partition wall(20) is integrally formed in the body part and forms the fluid through hole of a predetermined size in a central part. A valve(22) is inserted into the fluid through hole on the partition wall and controls the fluid flow passing through the fluid through hole. A valve supporting plate(26) is integrally or separately formed in the backend of the valve and forms a circular hooking recess(24) in the base part of the valve.

Description

Flow Switch {FLOW SWITCH}

The present invention relates to a flow switch, and more particularly, it is installed between pipes through which a fluid such as gas or liquid passes, and precisely detects whether fluid flows into the inside of the pipe and at the same time an electrical signal. The present invention relates to a flow switch capable of precisely and safely operating a system according to the flow of fluid in a conduit.

In general, the flow switch is installed between pipes arranged in various industrial facilities such as a cooling system or a boiler device of a semiconductor device to detect whether water, hydraulic pressure, or a fluid such as gas or pneumatic flows along the pipe. It is widely applied as a kind of safety device.

Looking at an example in which such a flow switch is applied, in the case of a refrigeration system in which the coolant must be continuously circulated, it is installed in the coolant circulation pipe, and the contact point of the switch is attached while the coolant continues to flow, and then the coolant circulation pump is driven. When the cooling water is blocked due to the stop, the contact point of the switch drops and an electric signal is output to generate an alarm sound or to automatically cut off the power supplied to the refrigeration system. To do.

On the contrary, when a flow switch is applied to a pipeline of industrial equipment where fluid should not flow into the pipeline in the operating state, the switch contact is attached in the normal state where the fluid does not flow. When fluid flows into the switch, the contact point of the switch drops and an electric signal may be output to generate an alarm sound or to cut off the driving power of the equipment.

As described above, various types of flow switches have been proposed and applied in order to be installed on a pipeline through which a fluid such as water, gas, hydraulic pressure, or pneumatic flows.

However, such a conventional flow switch has a problem in that its structure is relatively complicated and productivity and assembly workability are very poor.

In addition, in the conventional flow switch, when the amount of the fluid passing through the pipe is small, there is a serious problem such that it is not possible to accurately detect whether the flow of the fluid can not prevent the failure of the system in advance.

The present invention is to solve such a conventional problem, the object is to be installed between the passage (pipe) through which the fluid such as gas or liquid passes (pipe) to accurately detect whether the fluid flows into the interior of the pipe and At the same time, it provides a new flow switch that generates an electrical signal so that the operation of the system can be performed accurately and safely according to the flow of fluid in the pipeline.

Another object of the present invention is to provide a new flow switch capable of accurately detecting a small amount of fluid flowing in a conduit.

In order to achieve the above object, the flow switch according to the present invention is formed in the shape of a pipe having a predetermined diameter and length, the outer circumferential surface or the inner circumferential surface of both ends is formed with a threaded portion for coupling with the pipeline; A partition wall formed integrally with the body and having a fluid passage hole having a predetermined size at a central portion thereof; A valve controlling a flow of fluid flowing through the fluid through-hole in a state configured to be fitted into and coupled to the fluid through-hole on the partition wall; A valve support plate formed integrally with the rear end of the valve or fastened separately, and having a circular locking groove formed on a front surface corresponding to the base of the valve; The front end of the valve is wound on the outside of the circumference of the valve is inserted into the locking groove formed along the inner circumferential surface of the body portion corresponding to the rear base of the partition wall, the rear end is installed to fit into the locking groove formed on the front of the valve support plate; A spring which is extended by the pressure during the flow of the fluid and elastically restored and restored to its original state when the fluid is blocked, thereby giving an elastic force to the opening and closing operation of the valve; A magnet piece coupled to the upper center of the valve support plate and moved back and forth with the valve support plate within a range set according to the opening and closing operation of the valve; It is installed on the outer circumferential surface of the body portion corresponding to the movement distance of the valve and the valve support plate, the electrical signal while being "ON" or "OFF" in accordance with the opening and closing operation of the valve according to the flow of fluid in the fluid passage hole on the partition wall Reed switch for generating; The casing is fastened on the body corresponding to the rear end of the magnet piece, and the casing surrounding the reed switch is fixed to the body part. As the valve reaches the fully open position, the valve is responsive to the magnetic force of the magnet piece to "ON" or "OFF". And a magnetic sensitive bolt for controlling the operation.

According to the present invention, a partition wall having a fluid inlet hole is provided inside the body portion having a pipe shape, and the fluid inlet hole is configured to be fitted with a guide tube inserted with a valve and a spring, When the valve is opened and closed, the magnet piece moves simultaneously according to the linear movement of the valve, so that the reed switch can be turned "ON / OFF". Therefore, the flow of fluid in the pipeline can be detected more precisely, and the electrical signal can be output. There is an effect.

In addition, in the present invention, the partition wall is formed in the body portion, and as the fluid through hole of a very small size is formed in the center of the partition wall, even if a small amount of fluid flows into the body portion of the flow switch, the fluid passage hole formed in the partition wall As the pressure increases as it passes through, it can accurately detect the flow of a small amount of fluid, thereby controlling the operation of the system more safely and responding more quickly in the event of an emergency.

1 is an exploded perspective view showing the configuration of a flow switch according to the present invention.
2 is an enlarged cross-sectional view illustrating an installation state of a flow switch according to the present invention.
3 is an enlarged cross-sectional view illustrating an operating state of a flow switch according to the present invention.

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

1 to 3, in the flow switch 10 according to the present invention is made in the shape of a pipe having a predetermined diameter and length, the screw portion for coupling with the conduit 12 on the outer peripheral surface or the inner peripheral surface of both ends ( A body portion 16 formed with 14 is provided.

In the present invention, the partition wall 20 is integrally formed in the body portion 16, and a fluid passage hole 18 having a predetermined size is formed in the center of the partition wall 20, while the partition wall 20 is formed. In the fluid passage hole (18) formed on the) is configured to be coupled to the valve 22 is provided separately.

At the rear end of the valve 22, a valve support plate 26 having a relatively larger diameter than the diameter of the valve 22 is integrally formed or separately made and fastened. The valve 22 on the valve support plate 26 is formed. The front surface of the base portion (基底部) of the circular locking groove 24 has a structure formed.

A spring 28 is provided on the outside of the circumferential surface of the valve 22 to be elastically extended and restored to its original state when the fluid flows, and to give an elastic force to the opening and closing operation of the valve 22 while the fluid is blocked. ) Is installed to be wound.

The front end of the spring 28 is fitted into a locking groove 24 ′ formed along the inner circumferential surface of the body 16 corresponding to the rear base of the partition 20, and the rear end is hooked on the front surface of the valve support plate 26. It is installed in such a manner as to fit in the groove 24.

In the present invention, the upper portion of the valve support plate 26 is configured such that the magnet piece 30 moved back and forth together with the valve support plate 26 within a range set according to the opening and closing operation of the valve 22.

In addition, on the outer circumferential surface of the body portion 16 corresponding to the moving distance of the valve 22 and the valve support plate 26, the valve 22 according to whether the fluid flows in the fluid passage hole 18 on the partition wall 20. In accordance with the opening and closing operation of the) "ON" or "OFF" is configured so that the reed switch 32 for generating an electrical signal.

On the other hand, on the body portion 16 corresponding to the rear moving end of the magnet piece 30, the casing 32a surrounding the reed switch 32 is fixed to the body portion 16, and the valve 22 is fully open. At the same time as the position is reached, the magnetic force-sensing bolt 34 which is sensitive to the magnetic force of the magnet piece 30 and controls the "ON" or "OFF" operation of the reed switch 32 is fastened.

In the flow switch 10 according to the present invention in accordance with the opening and closing operation of the valve 22 by the flow of the fluid in the fluid passage hole 18 on the partition 20, while being "ON" or "OFF" As a switch for generating a signal, a magnetic switch, a limit switch, or the reed switch 32 illustrated in the embodiment of the present invention may be selectively applied.

The magnet switch, the limit switch or the reed switch 32 is configured to be connected to the electric wire 32b for electrical connection with a control unit for controlling the operation of the system to which the flow switch is applied.

In addition, during the opening and closing operation of the valve 22, the magnetic switch 30 is coupled to the valve support plate 26 so as to turn the magnet switch, the limit switch or the reed switch 32 on or off. The fastening position of the magnetic force sensitive bolt 34 is the moving distance of the valve 22 and the valve support plate 26 determined according to the depth of the fluid passage hole 18 formed in the partition wall 20 and the elastic modulus of the spring 28. Is set accordingly.

In the present invention, the contact pieces constituting the reed switch 32 are separated when the magnetic force is applied to the magnetic force sensitive bolt 34 by changing the installation direction according to the design needs of the system to which the flow switch 10 is applied. It is, of course, possible to control the " ON / OFF " state of the reed switch 32 in such a way that the state of the reed switch 32 is attached to or detached from the attached state.

The operation of the present invention made as described above is as follows.

First, the flow switch 10 according to the present invention, as shown in Figures 1 to 3, the magnet piece 30 is coupled to the upper end of the valve support plate 26, the outer side of the circumferential surface of the valve 22 Winding and installing the spring 28, the front end of the spring 28 is inserted into the engaging groove 24 'formed along the inner circumferential surface of the body portion 16 corresponding to the rear base of the partition wall 20, the spring ( The rear end of the valve 28 is fitted into the locking groove 24 formed on the front surface of the valve support plate 26 to complete the installation of the valve 22.

In this state, the valve 22 is inserted into the fluid through hole 18 by the elastic force of the spring 28 acting toward the fluid through hole 18 on the partition wall 20 to block the fluid through hole 18.

In this way, in the state in which the valve 22 is installed, on the outer circumferential surface of the body portion 16 corresponding to the installation position of the valve 22, in the movement path of the valve 22, the valve support plate 26, and the magnet piece 30. Install a magnetic switch, limit switch or reed switch 32 on the

At this time, when the magnetic force sensitive bolt 34 is fastened to the bottom surface of the casing 32a corresponding to the rearward moving end of the magnet piece 30, the assembly of the flow switch 10 according to the present invention is completed. Connects the conduit line 12 through which fluid such as liquid or gas flows to the threaded portion 14 formed on the outer or inner circumferential surface of the front end portion and the rear end of the body portion 6, and the wire 32b drawn out from the lead switch 32 is connected. Installation is complete when connected to the control unit.

In this state, when no fluid flows into the conduit 12, as shown in FIG. 2, the valve 22 blocks the fluid passage hole 18 on the partition wall 20 by the elastic force of the spring 28. , The contact piece of the reed switch 32 is kept in the "OFF" state apart.

On the other hand, when the fluid flows into the conduit 12, as shown in FIG. 3, the pressure of the fluid is applied to the front end surface of the valve 22 fitted in the fluid passage hole 18 on the partition wall 20 and at the same time the valve 22 ) Is pushed backward while extending the spring 28, and the magnet piece 30 coupled to the valve support plate 26 is also moved backwards by the same distance.

In this way, when the valve 22 reaches the rear movement end point while extending the spring 28, the magnet piece 30 passes through the bottom surface of the casing 32a surrounding the reed switch 32. The magnetic force generated from the magnet piece 30 is applied to the magnetic force sensitive bolt 34 while being positioned on the same line as the magnetic force sensitive bolt 34 fastened to the magnetic force sensitive bolt 34, and the contact piece of the reed switch 32 is lowered by the magnetic force. Pulled toward the magnetic force sensitive bolt 34, the contact of the reed switch 32 is made to change to the "ON" state.

In this state, when the fluid does not flow into the conduit 12, the pressure of the fluid applied to the valve 22 is canceled, and accordingly, the spring 28, which has been extended backward, is compressed and restored to its original state. The valve 22 and the valve support plate 26 are moved forward again by the restoring force of the 28 so that the valve 22 blocks the fluid passage hole 18 on the partition wall 20 again.

At the same time, the magnet piece 30 inserted and coupled to the valve support plate 26 is also moved forward to be spaced apart from the magnetic force sensitive bolt 34, and the magnetic force applied to the magnetic force sensitive bolt 34 is also erased. The contact piece of the reed switch 33 is returned to the original state, and the contact is dropped, and the reed switch 32 is in an "OFF" state.

As described above, when the fluid flows in the conduit 14 and the reswitch 32 is kept in the "ON" state as shown in FIG. 3, the fluid is not flowed into the conduit 14. As shown in FIG. 2, when the contact piece of the reed switch 32 falls into the " OFF " state, an electric signal is generated from the reed switch 32, and the electric signal is applied to the controller through the wire 32b to be input in advance. Depending on the programmed program, follow-up measures can be taken to deal with abnormal situations in which no fluid is flowing, such as outputting a warning sound or shutting down the operating power.

Meanwhile, when the valve 22 is opened, the fluid introduced through the fluid passage hole 18 on the partition wall 20 flows through the conduit 12 connected to the rear portion of the body 16.

In describing the operation of the present invention, when the fluid flows along the conduit 12, the valve 22 is opened and at the same time the magnet piece 30 is moved toward the magnetic sensitive bolt 34 and the contact of the reed switch 32 is attached. It illustrated by exemplifying "ON".

However, if the operating state of the contact piece constituting the reed switch 32 is reversed, the fluid is not flowed into the conduit 12 while the " ON " When the fluid flows into the inside of the valve 12, the valve 22 is opened and the magnet piece 30 is moved toward the magnetic force sensitive bolt 34 so that the contact piece of the reed switch 32 is in an "OFF" state. Of course, this also falls within the scope of the technical idea of the present invention.

12: pipeline 14: threaded portion
16 body portion 18 fluid through hole
20: bulkhead 22: valve
24,24 ': Locking groove 26: Valve support plate
28: spring 30: magnet piece
32: Reed switch 34: Magnetically sensitive bolt.

Claims

A body portion 16 formed in the shape of a pipe having a predetermined diameter and length, and having threaded portions 14 for coupling with the conduit 12 on the outer circumferential surface or the inner circumferential surface of both ends;
A partition wall 20 formed integrally with the body part 16 and having a fluid passage hole 18 having a predetermined size at a central portion thereof;
A valve (22) for controlling the flow of fluid passing through the fluid through hole (18) in a state configured to be fitted into and coupled to the fluid through hole (18) on the partition wall (20);
A valve support plate 26 formed integrally with the rear end of the valve 22 or separately made and fastened, and having a circular locking groove 24 formed on a front surface corresponding to the base of the valve 22;
In the state wound around the outer circumferential surface of the valve 22, the front end portion is fitted into the engaging groove 24 'formed along the inner circumferential surface of the body portion 16 corresponding to the rear base of the partition 20, the rear end is caught It is installed so as to be fitted into the engaging groove 24 formed in the front of the support plate 26, it is elongated by the pressure during the flow of the fluid and resilient and restored to its original state when the fluid is blocked, so that the valve 22 A spring 28 for imparting elastic force to the opening and closing operation;
A magnet piece 30 coupled to the upper center of the valve support plate 26 and moved back and forth with the valve support plate 26 within a range set according to the opening and closing operation of the valve 22;
It is installed on the outer circumferential surface of the body portion 16 corresponding to the moving distance of the valve 22 and the valve support plate 26, the valve according to the flow of fluid in the fluid passage hole 18 on the partition wall 20 A reed switch 32 which generates an electric signal while being “ON” or “OFF” in accordance with the opening and closing operation of the 22;
The casing 32a, which is fastened on the body portion 16 corresponding to the rearward moving end of the magnet piece 30 and surrounds the reed switch 32, is fixed to the body portion 16, and the valve 22 is completely A flow switch comprising a magnetic force sensitive bolt 34 that reaches the open position and is sensitive to the magnetic force of the magnet piece 30 to control the "ON" or "OFF" operation of the reed switch 32. .