JP2002188972A - Pressure controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure controller having no restriction on an installation space, capable of monitoring the quantity of a pressure change of a pressure source, detecting that the pressure of the pressure source becomes a fixed value or higher, and reducing a cost. SOLUTION: This pressure controller is equipped with a case body 2, a piston 3 installed slidably inside the case body 2, for dividing the inside of the case body 2 into two chambers 21, 22, a first pressure introduction hole 4 formed on the case body 2 and communicated with one chamber 21 between the two chambers 21, 22, a pressure switch 7 installed on the case body 2 and opened and closed sequentially with the operation of the piston 3, and a manometer module 8 installed on the case body 2, for measuring the pressure in one chamber 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pressure controller such as a pressure gauge and a pressure switch. For example, it can be used for measuring and detecting the pressure inside a pressure device such as a pressure reducing valve.

[0002]

2. Description of the Related Art Conventionally, as a device for measuring pressure, there are known a pressure gauge which constantly measures an amount of change in pressure by an indicator, and a pressure switch which transmits a signal to the outside when the pressure reaches a certain value. The pressure gauge is provided, for example, in daily maintenance and management, that is, a pressure device that needs to constantly monitor a change in pressure, or a place where it is desired to grasp a change tendency and a change transition of pressure in a timely manner. On the other hand, a pressure switch is provided, for example, on a pressure device in a place where daily maintenance cannot be performed or a pressure device that does not require daily maintenance, and is connected to a drive system or a control system. By
When the pressure in the device becomes excessive and exceeds an allowable value, a switch is activated and a signal is transmitted, so that safety management of the pressure device can be performed.

[0003]

Conventional pressure gauges and pressure switches are used for different purposes. However, the conventional pressure gauge and the pressure switch have a function of monitoring a change in pressure inside the apparatus and a function of detecting that the pressure exceeds a certain value. There is a demand for a pressure controller having the function of performing pressure control. For example, when a filter in a pressure reducing valve is clogged and the pressure becomes excessive and exceeds an allowable value, a measure such as opening a safety valve by operating a pressure switch is required. Becomes At the same time, even before the pressure switch is activated, if the change in the pressure in the pressure reducing valve, that is, the degree of clogging of the filter can be monitored, it is possible to take appropriate measures such as replacing the filter. . In response to such demands, a pressure gauge and a pressure switch were provided separately, so much work was required to attach the pressure gauge and the pressure switch to the pressure equipment, resulting in an increase in cost and a wide installation. Space was needed.

[0004] It is an object of the present invention to monitor the amount of change in pressure of a pressure source, detect that the pressure of the pressure source has exceeded a predetermined value, and reduce the cost without being restricted by the installation space. It is to provide a controller.

[0005]

In order to achieve the above object, a pressure controller according to the present invention employs the following configuration. The pressure controller according to claim 1, further comprising: a case main body; a piston slidably provided inside the case main body to partition the case main body into two chambers; A first pressure introduction port that communicates with one of the chambers, a pressure switch that opens and closes in conjunction with the operation of the piston, and a pressure gauge module that is provided in the case body and measures the pressure of the one chamber. It is characterized by having. Here, the pressure gauge module includes a pressure element such as a Bourdon tube that converts a pressure change amount into a physical change amount, an expansion mechanism that expands the physical change amount converted by the pressure element, and an expansion mechanism. It may have a configuration having an instruction mechanism for displaying the amount of change enlarged by the mechanism to the outside, or the amount of displacement of a diaphragm or the like displaced by the fluid pressure to be measured is detected by a strain gauge or a capacitance sensor, and this is detected. It may be configured to display digitally.

According to the present invention, when the first pressure inlet is connected to a pressure source, for example, a pressure device, a fluid such as air inside the pressure device passes through the first pressure inlet to one of the inside of the case body. Since the pressure in the one chamber becomes equal to the pressure in the pressure equipment, the pressure in one chamber is measured and displayed by the pressure gauge module, so that the pressure in the pressure equipment is always displayed. You. At the same time, when the pressure in one chamber reaches a certain value, the pressing force of the fluid on the piston exceeds the resistance of the piston, and the piston slides, and the pressure switch opens and closes in conjunction with the operation of this piston. Then a signal is transmitted. Therefore, the amount of change in the pressure of the pressure source can be monitored, and it can be detected that the pressure of the pressure source has exceeded a certain value. In addition, since the pressure gauge and the pressure switch are integrated, the size can be reduced and the installation space is not restricted, and the pressure gauge can be easily attached to the pressure device, so that the cost can be reduced.

[0007] The pressure controller according to the second aspect is the first aspect.
In the pressure controller described in the above, the case body is provided with a second pressure introduction port that is communicated with the other of the two chambers, and the pressure gauge module is configured to control the pressure of the one chamber. And measuring the pressure difference between the pressure in the other chamber and the pressure in the other chamber.

According to the present invention, the second pressure inlet is
When connected to a pressure source different from the first pressure inlet, for example, to a location different from the first pressure inlet of the pressure device, a fluid such as air inside the pressure device passes through the second pressure inlet and flows into the case body. Flows into the other room, and the pressure in the other room becomes equal to the pressure in the pressure device. Therefore, the differential pressure between the pressure in the other room and the pressure in one room is measured and displayed by the pressure gauge module. As a result, the differential pressure at two different locations inside the pressure device is always displayed. At the same time, when the difference between the pressure in one chamber and the pressure in the other chamber reaches a certain value, the pressure generated by the fluid against the piston exceeds the resistance of the piston, causing the piston to slide. The pressure switch is opened and closed in conjunction with the operation of the piston, and a signal is transmitted. Therefore, the amount of change in the differential pressure between the two different pressure sources can be monitored, and it can be detected that the differential pressure has exceeded a certain value.

According to a third aspect of the present invention, there is provided a pressure controller.
Or the pressure controller according to 2, wherein the main body includes:
A pressure gauge module mounting hole for communicating the one chamber with the pressure gauge module is provided, and the pressure gauge module mounting hole is configured to be sealed by a lid member when the pressure gauge module is removed from the case main body. It is characterized by having been done. According to the present invention, since the pressure gauge module is removed and the pressure gauge module mounting hole communicating with the pressure gauge module is sealed with the lid member, the pressure controller is used only as a pressure switch or a differential pressure switch. In addition, unnecessary functions can be easily omitted.

[0010] The pressure controller according to claim 4 is the pressure controller according to claim 1.
3. The pressure controller according to any one of claims 1 to 3, wherein the first pressure inlets are provided at two positions orthogonal to each other, and one of the two first pressure inlets is provided with a pressure source. Is selectively attached, and the other one can be sealed with a stopper. According to the present invention, the joint is attached to one of the first pressure introduction ports provided at two locations in the orthogonal direction, and the other is sealed with the stopper, so that the mounting posture of the pressure controller with respect to the pressure device. Can be rotated 90 degrees, so that a pressure controller can be attached according to the shape of the pressure device, the space for installing the pressure controller, and the like.

According to a fifth aspect of the present invention, there is provided a pressure controller.
5. The pressure controller according to any one of items 1 to 4, wherein a case body, a piston slidably provided inside the case body and partitioning the inside of the case body into two chambers, and a piston provided in the case body. A pressure inlet which is communicated with one of the chambers, a pressure gauge module mounting hole which is provided in the case body and is communicated with one of the two chambers, and a pressure switch which is opened and closed in conjunction with the operation of the piston. A pressure switch module, a joint module having a pressure inlet and a pressure gauge module mounting hole communicating with the pressure inlet, and the pressure switch module and the pressure gauge selectively mounted in the pressure gauge module mounting hole of the joint module. A pressure gauge module for measuring the pressure in the gauge module mounting hole, and a pressure gauge module of the pressure switch module. A lid member for sealing the Yuru mounting hole, characterized in that selectively combinable to construct these.

According to the present invention, by combining the pressure switch module and the pressure gauge module,
Similarly to the first aspect, the amount of change in the pressure of the pressure source can be monitored, and it can be detected that the pressure of the pressure source has exceeded a certain value. Further, by combining the pressure switch module and the cover member, the function as a pressure gauge can be omitted, and the pressure switch module can be used only as a pressure switch or a differential pressure switch. Further, by combining the pressure gauge module and the joint module, the function as a pressure switch is omitted, and the pressure gauge module can be used only as a pressure gauge or a differential pressure gauge.
Therefore, by appropriately combining the unitized parts of the pressure switch module, the joint module, the pressure gauge module, and the lid member, a pressure controller having a function according to the application can be easily formed, and the size can be reduced. In addition to being limited by space, it can be easily attached to a pressure device, so that costs can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a front view and a plan view of a pressure controller 1 having functions of a pressure switch and a pressure gauge according to the present embodiment. FIGS. 3 and 4 are a sectional view taken along line III-III and a sectional view taken along line IV-IV of FIG. The pressure controller 1 includes a pressure switch module 11 and a pressure gauge module 8 attached to the pressure switch module 11.

The pressure switch module 11 includes a case body 2 and a piston 3 slidably provided inside the case body 2 to partition the case body 2 into two chambers 21 and 22.
A first pressure inlet 4 provided in the case body 2 and connected to one of the two chambers 21 and 22 and a second pressure inlet 5 connected to the other chamber 22; A pressure gauge module mounting hole 10 provided in the main body 2 and communicated with one chamber 21 is provided, and a pressure switch 7 provided in the case main body 2 and opened and closed in conjunction with the operation of the piston 3. Here, the first pressure inlet 4 and the second pressure inlet 5 are connected to a pressure device (not shown) as a pressure source by a pipe (shown by a dotted line in FIGS. , Pressure P2 is introduced.

The case main body 2 is a housing composed of a main body 2A and a cover 2B provided on the upper part of the main body 2A, and has an internal space S formed therein. A piston 3 is provided near one end (lower in FIG. 3) of the internal space S, and a biasing force adjusting mechanism 6 for applying a biasing force to the piston 3 and a biasing force display mechanism 9 near the other end (upper in FIG. 3). Is provided. This internal space S is divided into three chambers 21 and 2 by the piston 3 and the urging force adjusting mechanism 6.
It is divided into 2,23.

The biasing force adjusting mechanism 6 is slidable into a cylindrical spring seat 61 having an internal thread on one end face, and inserted into the cover 2B of the case body 2 and screwed into the internal thread of the spring seat 61. An adjustment screw 62, a needle 63 engaged with the spring seat 61 to regulate the rotation of the spring seat 61, and a spring 64 abutting on the other end surface of the spring seat 61 to bias the piston 3.

The spring seat 61 is slidable in the longitudinal direction of the internal space S, and an annular packing 65 is mounted on the outer periphery of the spring seat 61 near the chamber 22 side. Airtightness is maintained.

The adjusting screw 62 includes a groove 62B formed on the head thereof for locking a driver or the like, and an annular stopper 62A provided between the head and the neck. The portion is exposed from the cover portion 2B, and is prevented from protruding from the cover portion 2B by the annular stopper 62A. When the adjusting screw 62 is rotated by a driver or the like from the outside, the rotation of the spring seat 61 is regulated by the needle 63, the spring seat 61 advances and retreats together with the needle 63, and the spring length of the spring 64 changes and is given to the piston 3. The biasing force can be adjusted.

The urging force display mechanism 9 includes a base line 91 displayed at the tip of the needle 63 of the urging force adjusting mechanism 6, a transparent cover 92 provided on the case main body 2 so that the base line 91 can be viewed, and a vicinity of the transparent cover 92. And a graduation 93 provided at the center. When the adjusting screw 62 is rotated to adjust the urging force, the baseline 91 also advances and retreats with the advance and retreat of the spring seat 61. Therefore, by reading the numerical value of the scale 93 indicated by the baseline 91, the urging force applied to the piston 3 is read. Is available.

The piston 3 has a cylindrical shape and is slidable in the longitudinal direction of the internal space S.
It has a stopper 31 that abuts on the side end, and a recess 32 into which the spring 64 is inserted and abuts. Piston 3
Is the chamber 2 with the urging force applied by the urging force adjusting mechanism 6.
While being pressed to one side, the movement is regulated by the stopper 31.

An annular magnet 33 is fitted to the end of the outer periphery of the piston 3 on the chamber 21 side.
It is fixed by a push nut 34 fitted to the stopper 31. In the vicinity of the outer periphery of the piston 3 near the chamber 22, a recess is formed over the entire circumference, and the recess is formed in the recess.
An annular packing 35 for maintaining airtightness is mounted.

The first pressure inlet 4 is connected to the chamber 2 of the main body 2A.
It is composed of a first pressure inlet 4A provided on the end face on one side and a first pressure inlet 4B provided on the outer peripheral surface of the main body 2A, and they are orthogonal to each other. Each of the first pressure introduction ports 4A, 4B is a circular hole having the same shape with an external thread engraved around the first pressure introduction port 4A, 4B. A joint 41 for connecting to a pressure device (not shown) as a pressure source is screwed into the port 4A, and the first pressure inlet 4B is
A stopper 42 for sealing the pressure introduction port 4B is screwed. The joint 41 is provided with a communication hole that communicates the pressure device with the chamber 21. This communication hole appears to be closed by the stopper 31 of the piston 3 in FIGS. 3 and 4. Actually, it is not closed and communicates with the room 21. Therefore, only the first pressure inlet 4A is connected to a pressure device (not shown) via the joint 41, so that the pressure in the chamber 21 is the pressure P1.

The second pressure inlet 5 is provided on the outer peripheral surface of the main body 2A. The pressure introduction port 5 is a circular hole with a female screw cut therearound, and is connected to a pressure device (not shown) so that the pressure in the chamber 22 becomes the pressure P2.

The pressure gauge module mounting hole 10 is
A is provided on the outer peripheral surface of A and communicates the chamber 21 with the outside.
In the vicinity of the pressure gauge module mounting hole 10, a communication hole 86 that communicates the chamber 22 with the inside of the pressure gauge case 84 is provided.

The pressure switch 7 includes a cylindrical reed switch holder 74, a reed switch 73 housed near the tip of the reed switch holder 74, and an electric wire 72 connected to the reed switch 73. The switch 73 and the electric wire 72 are fixed in a reed switch holder 74 by a molding material. The reed switch holder 74 is housed in an insertion hole 71 provided in the main body 2A of the case main body 2 along the longitudinal direction of the internal space S, and is fixed by a screw (not shown) provided on a side surface of the main body 2A. ing. The reed switch 73
When the piston 3 slides and the magnet 33 approaches, the reed piece inside the reed switch 73 is closed, and a signal is transmitted to a control system or the like provided outside via the electric wire 72.

The pressure gauge module 8 includes a pressure gauge case 84 fixed to the outer peripheral surface of the main body 2A of the pressure switch module 11, and a built-in pressure gauge case 84 that converts a change in pressure into a physical change. Tube 81 as a pressure element for performing the operation, an enlargement mechanism 82 incorporated in the pressure gauge case 84 for enlarging the physical change amount converted by the Bourdon tube 81, and an enlargement mechanism 82 incorporated in the pressure gauge case 84
And an instructing mechanism 83 for displaying the amount of change enlarged by the external device.

The pressure gauge case 84 includes a rising portion 84B that rises in a circular shape from the outer peripheral surface of the main body 2A, and a flange portion 8 that projects inward from the entire upper end of the rising portion 84B.
4A and a glass 85 which is locked to the flange 84A over the entire circumference. The pressure gauge case 84 is fixed with screws to the main body 2A with the packing 88 interposed therebetween, and seals the Bourdon tube 81, the enlargement mechanism 82 and the indicating mechanism 83, and the indicating mechanism 83 is visible from the outside. A pressure gauge mounting plate 87 is rotatably supported on a rising portion 84B of the pressure gauge case 84,
The Bourdon tube 81 and the enlargement mechanism 82
And the indicating mechanism 83 are fixed. Pressure gauge mounting plate 8
By rotating 7, the Bourdon tube 81, the enlargement mechanism 82, and the pointing mechanism 83 rotate. Here, a communication hole 86 is connected to the pressure gauge case 84, and the pressure inside the pressure gauge case 84 is equal to the pressure P2 of the chamber 22.

The indicating mechanism 83 includes a scale plate 83A fixed to the pressure gauge mounting plate 87, and a pointer 83B provided on the scale plate 83A and connected to the enlargement mechanism 82.

The Bourdon tube 81 has a proximal end connected to the pressure gauge module mounting hole 10 with a packing 89 interposed therebetween, and a distal end connected to the enlargement mechanism 82. Fluid such as air in the chamber 21 flows into the Bourdon tube 81 through the pressure gauge module mounting hole 10, and the pressure inside the Bourdon tube 81 becomes:
The pressure P1 is equal to the pressure of the chamber 21. At this time, since the pressure outside the Bourdon tube 81, that is, the pressure inside the pressure gauge case 84, is the pressure P2, the pressure difference between the pressure P1 inside the Bourdon tube 81 and the outside pressure P2 (P1-P2). The Bourdon tube 81 is deformed and its tip is displaced, and this displacement is enlarged by the enlargement mechanism 82 so that the pointer 83B touches.

The pressure controller 1 is assembled by attaching the pressure gauge module 8 to the pressure switch module 11. Specifically, the Bourdon tube 81 of the pressure gauge module 8 is connected to the pressure gauge module mounting hole 10 of the pressure switch module 11 with a packing 89 interposed therebetween, and the pressure gauge case 8 of the pressure gauge module 8 is connected.
4 is fixed with screws with a packing 88 therebetween so as to cover the communication hole 86 of the pressure switch module 11.

Next, a method of using the pressure controller 1 will be described. By rotating the adjusting screw 62 of the pressure switch module 11 with a driver or the like, and reading the scale 93 indicated by the base line 91 of the urging force display mechanism 9, appropriately adjusting the intensity of the urging force applied to the piston 3 of the spring 64, The first pressure inlet 4 and the second pressure inlet 5 are connected to pressure sources P1 and P2 such as pressure devices (not shown) by piping (indicated by dotted lines in FIGS. 1 to 3). Then, a fluid such as air in the pressure device flows into the Bourdon tube 81 through the first pressure inlet 4, the chamber 21 and the pressure gauge module mounting hole 10, and flows into the second pressure inlet 5, the chamber 22. And flows into the outside of the Bourdon tube 81 through the communication hole 86. Therefore, the pressure difference between the pressure P1 inside the Bourdon tube 81 and the pressure P2 outside (P1-
P2) is displayed on the pressure gauge module 8.

When the pressure difference between the pressure P1 in the chamber 21 and the pressure P2 in the chamber 22 exceeds the urging force applied to the piston 3 by the urging force adjusting mechanism 6, the piston 3 slides and the magnet 3 moves. When the 33 approaches the reed switch 73, the reed switch 73 operates.

Here, the pressure controller 1 can be used as a pressure gauge and a pressure switch. In this case, the second
Is not connected to a pressure device as a pressure source having a pressure P2, is opened to the atmosphere, and P2 = 0.

Here, as shown in FIG.
Can be rotated by 90 degrees. In this case, the pressure controller 1 exchanges the joint 41 screwed to the first pressure inlet 4A with the stopper 42 screwed to the first pressure inlet 4B, and the pressure controller 4 Is connected to a pressure device, and a stopper 42 is screwed to the pressure inlet 4A. Further, by rotating the pressure gauge mounting plate 87, the Bourdon tube 81, the enlarging mechanism 82 and the indicating mechanism 83 are moved counterclockwise in FIG.
It has been rotated 0 degrees.

Further, as shown in FIG. 6, the pressure controller 1 can be used only as a differential pressure switch. In this case, the pressure controller 1 includes a pressure switch module 11 and
A cover member 12 attached to the pressure switch module 11 and sealing the pressure gauge module mounting hole 10 is provided. That is, instead of the pressure gauge module 8, the lid member 12
Is attached to the pressure switch module 11 so as to function only as a differential pressure switch. The lid member 12 is a flat plate having the same size as the pressure gauge module 8, and is screwed to the outer peripheral surface of the main body 2A of the pressure switch module 11, similarly to the pressure gauge module 8.

As shown in FIGS. 7 and 8, the pressure controller 1 can be used only as a pressure gauge or a differential pressure gauge. In this case, the pressure controller 1 includes a first joint module 13 and a pressure gauge module 8 attached to one side surface of the first joint module 13.

The first joint module 13 includes a joint body 13A of a housing, a first pressure inlet 4 provided on the lower surface of the joint body 13A and having the same shape as the joint 41, and a joint body 1A.
The pressure gauge module mounting hole 10 provided on one side surface of the pressure gauge module 3A and communicated with the first pressure introduction port 4, and the second pressure introduction hole provided on the side surface of the joint body 13A opposite to the pressure gauge module mounting hole 10. It has a port 5 and a communication hole 86 which is provided near the pressure gauge module mounting hole 10 on one side surface of the joint body 13A and communicates with the second pressure introduction port 5. Therefore, the first pressure inlet 4 is provided on the lower surface side of the pressure gauge module 8.
Is provided, and the second pressure introduction port 5 is provided on the back side, so that the scale plate 83A and the pointer 83B are positioned parallel to the first pressure introduction port 4.

The pressure controller 1 is assembled by using a joint module 13 instead of the pressure switch module 11 and fixing the pressure gauge module 8 to the joint module 13 with screws.

As shown in FIGS. 9 and 10, the pressure controller 1 can be used only as a pressure gauge or a differential pressure gauge. The pressure controller 1 includes a second joint module 1
4 and a pressure gauge module 8 attached to one side surface of the second joint module 14.

The second joint module 14 includes a joint main body 14A of a housing and a first pressure inlet 4 and a second pressure inlet 5 provided on a side opposite to one side of the joint main body 14A. And a pressure gauge module mounting hole 10 provided on one side surface of the joint body 14A and communicated with the first pressure introduction port 4.
And a communication hole 86 provided in the vicinity of the pressure gauge module mounting hole 10 on one side surface of the joint body 14A and communicated with the second pressure introduction port 5. Therefore, the first pressure inlet 4 and the second pressure inlet 5 are provided on the back side of the pressure gauge module 8, and the scale plate 83A and the pointer 83B are perpendicular to the first pressure inlet 4. It is located at.

Such a controller 1 is assembled by using a joint module 14 instead of the pressure switch module 11 and fixing the pressure gauge module 8 to the joint module 14 with screws.

Therefore, according to the present embodiment, the following effects can be obtained. (1) The first pressure inlet 4 and the second pressure inlet 5 are
Since they are connected to pressure devices as pressure sources having different pressures P1 and P2, a fluid such as air inside the pressure devices flows into the chamber 21 inside the case main body 2 through the first pressure inlet 4 and The pressure in this chamber 21 becomes equal to the pressure P1 inside the pressure device. Further, the fluid inside the pressure device flows into the chamber 22 inside the case main body 2 through the second pressure inlet 5, and the pressure in this chamber 22 becomes equal to the pressure P2 inside the pressure device. Therefore, the pressure P2 of the chamber 22 and the pressure P1 of the chamber 21
Is measured and displayed by the pressure gauge module 8, so that the differential pressure (P1-P2) at two different locations inside the pressure device is always displayed. At the same time, when the difference between the pressure P2 of the chamber 22 and the pressure P1 of the chamber 21 reaches a certain value, the pressing force of the fluid generated by the differential pressure (P1-P2) on the piston 3 reduces the resistance of the piston 3. When it exceeds, the piston 3 is slid, and the pressure switch 7 is opened and closed in conjunction with the operation of the piston 3 to transmit a signal. Therefore, the amount of change in the differential pressure (P1-P2) between the two different pressure sources can be monitored, and it can be detected that the differential pressure (P1-P2) has reached a certain value or more. Also, since the pressure gauge and pressure switch are integrated,
Since it can be easily attached to the pressure device and the size can be easily reduced, the cost can be reduced.

(2) Since the chamber 22 in the pressure switch module 11 becomes equal to the atmospheric pressure if the second pressure inlet 5 is opened to the atmosphere, the pressure controller 1 is used as a pressure gauge and a pressure switch. Can also.

(3) After removing the pressure gauge module 8,
Since the pressure gauge module mounting hole 10 communicating with the pressure gauge module 8 is sealed with the lid member 12, the pressure controller 1
When is used only as a differential pressure switch, unnecessary functions can be easily omitted.

(4) Of the first pressure introduction ports 4A and 4B provided at two locations in the orthogonal direction, the first pressure introduction port 4A
And the first pressure inlet 4B is closed with the stopper 4
2, the mounting posture of the pressure controller 1 with respect to the pressure device can be rotated by 90 degrees, so that the pressure controller 1 can be changed according to the shape of the pressure device, the mounting space of the pressure controller, and the like. Can be attached.

(5) By combining the joint modules 13 and 14 with the pressure gauge module 8, the function as a pressure switch or a differential pressure switch is omitted and the module can be used only as a differential pressure gauge. Therefore, by appropriately combining the unitized components of the pressure switch module 11, the joint modules 13, 14, the pressure gauge module 8, and the lid member 12, the pressure controller 1 having a function according to the application can be easily formed. Therefore, the size can be reduced, so that it is not limited by the installation space, and can be easily attached to the pressure device, so that the cost can be reduced.

(6) Since the directions of the scale plate 83A and the pointer 83B are rotated by 90 degrees, the reading posture can be rotated by 90 degrees in accordance with the mounting posture.
Can easily read the numerical value of the scale plate 83A indicated by.

(7) Since the urging force adjusting mechanism 6 and the urging force display mechanism 9 are provided, the urging force on the piston 3 can be easily applied from the outside by a driver or the like, that is, the differential pressure (P1-P2) for operating the pressure switch 7. ) Can be easily set.

The present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved. For example, in the above embodiment, the Bourdon tube 81, the enlargement mechanism 82, and the indicating mechanism 83 are rotatable with respect to the pressure gauge case 84, but may be fixed to the pressure gauge case 84 without being rotatable.

[0050]

According to the pressure controller of the present invention, the following effects can be obtained. When the first pressure inlet is connected to a pressure source, for example, a pressure device, a fluid such as air inside the pressure device flows into the one chamber inside the case body through the first pressure inlet, and the one chamber Is equal to the pressure inside the pressure device, the pressure inside the pressure device is always displayed by measuring and displaying the pressure in one chamber by the pressure gauge module. At the same time, when the pressure in one chamber reaches a certain value, the pressing force of the fluid on the piston exceeds the resistance of the piston, and the piston slides, and the pressure switch opens and closes in conjunction with the operation of this piston. Then a signal is transmitted. Therefore, the amount of change in the pressure of the pressure source can be monitored, and it can be detected that the pressure of the pressure source has exceeded a certain value. In addition, since the pressure gauge and the pressure switch are integrated, the size can be reduced and the installation space is not restricted, and the pressure gauge can be easily attached to the pressure device, so that the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view illustrating a pressure controller having functions of a pressure switch and a pressure gauge according to an embodiment of the present invention.

FIG. 2 is a plan view of the pressure controller according to the embodiment.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

FIG. 5 shows the mounting posture of the pressure controller according to the embodiment as 9;
It is the front view rotated 0 degrees.

FIG. 6 is a front view of a pressure controller used only as a pressure switch according to the embodiment.

FIG. 7 shows a pressure controller according to the embodiment that is used only as a differential pressure gauge in which a first pressure inlet is provided on a lower surface side of a pressure gauge module and a second pressure inlet is provided on a back surface side. It is a front view.

FIG. 8 shows a pressure controller according to the embodiment which is used only as a differential pressure gauge in which a first pressure inlet is provided on a lower surface side of a pressure gauge module and a second pressure inlet is provided on a back surface side. It is a longitudinal cross-sectional view.

FIG. 9 is a front view of the pressure controller used only as a differential pressure gauge having a first pressure inlet and a second pressure inlet on the back side of the pressure gauge module according to the embodiment.

FIG. 10 is a longitudinal sectional view of a pressure controller used only as a differential pressure gauge having a first pressure inlet and a second pressure inlet on the back side of the pressure gauge module according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pressure controller 2 Case main body 3 Piston 4, 4A, 4B 1st pressure introduction port 5 2nd pressure introduction port 7 Pressure switch 8 Pressure gauge module 10 Pressure gauge module mounting hole 11 Pressure switch module 12 Cover member 13, 14 Joint module 21, 22 room 41 Joint 42 Stopper

 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Hidetoshi Hayashi 1-30-4 Higashimagome, Ota-ku, Tokyo Nagano Keiki Co., Ltd. F-term (reference) 2F055 AA40 BB05 CC03 CC06 DD20 EE04 FF31 GG25 GG49 HH03

Claims (5)

[Claims] 1. A case body, a piston slidably provided inside the case body and partitioning the inside of the case body into two chambers, and communicating with one of the two chambers provided on the case body. A first pressure introduction port, a pressure switch provided in the case body and opened and closed in conjunction with the operation of the piston, and a pressure gauge module provided in the case body and measuring a pressure of the one chamber. A pressure controller comprising: 2. The pressure controller according to claim 1, wherein
The case main body is provided with a second pressure introduction port that is communicated with the other of the two chambers, and the pressure gauge module is configured to control the pressure of the one chamber and the pressure of the other chamber. A pressure controller characterized by measuring a differential pressure of a pressure. 3. The pressure controller according to claim 1, wherein the main body is provided with a pressure gauge module mounting hole for connecting the one chamber to the pressure gauge module. The pressure controller is characterized in that the pressure gauge module can be sealed by a lid member when the pressure gauge module is removed from the case main body. 4. The pressure controller according to claim 1, wherein the first pressure introduction ports are provided at two locations in a direction orthogonal to each other, and the first pressure introduction ports are provided in two directions. A pressure controller, wherein one of the joints is selectively attached to a pressure source, and the other is sealable with a stopper. 5. A case main body, a piston slidably provided inside the case main body and partitioning the inside of the case main body into two chambers, and provided in the case main body and communicated with one of the two chambers. A pressure having a pressure inlet, a pressure gauge module mounting hole provided in the case main body and communicating with one of the two chambers, and a pressure switch provided in the case main body and opened and closed in conjunction with the operation of the piston. A switch module, a pressure inlet, and a joint module having a pressure gauge module mounting hole communicating with the pressure inlet, and a pressure switch module and a pressure gauge module mounting hole selectively mounted in the pressure gauge module mounting hole of the joint module. The pressure gauge module for measuring the pressure of the pressure gauge and the pressure gauge module mounting hole of the pressure switch module are sealed. A pressure controller, comprising a lid member for stopping, and a structure in which these can be selectively combined.