JPH0530120Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pressure gauge, and more specifically, the invention relates to a pressure gauge. In a pressure gauge that displays a pressure value, such as a Bourdon tube pressure gauge, the pointer that acts as a pressure element is bent and attached, while being visible through transparent parts provided on the top and front of the pressure gauge. The present invention relates to a pressure gauge that is provided with two scale display sections and configured such that fluid pressure can be confirmed from either above or from the front using the single pointer.

[Background of the invention] In a pressure fluid system in which a pressure fluid, such as compressed air, is supplied to drive an actuator, it is common practice to install a pressure gauge at a predetermined location in the fluid supply system. There is. This is to constantly monitor the pressure of the supplied pressure fluid, supply pressure fluid at an appropriate pressure to the actuator, etc., and ensure normal operation of the entire system at all times. Therefore, various pressure gauges have been developed and used in fluid supply systems.

Such a pressure gauge uses an elastic member such as a Bourdon tube or a diaphragm, and measures the pressure value of the pressure fluid by utilizing the deformation of these members under the pressure of the pressure fluid. Many things are used. This type has a simple structure, low price, small size, and easy handling, so it has become the most widely used.

Therefore, a commonly used Bourdon tube pressure gauge is illustrated in FIGS. 1 and 2. In addition, in FIG. 1 and FIG. 2, the same reference numerals indicate the same components.

First, in FIG. 1, reference numeral A indicates a Bourdon tube type pressure gauge. That is, the cylindrical casing 2 is equipped with a display section 4 on which numerical values are drawn for displaying fluid pressure in an analog manner, and a pointer 6 is provided in the center of the display section 4 along the axis of the casing 2. It is rotatably provided. On the other hand, a joint member 8 defining a passage for supplying pressure fluid to a curved Bourdon tube (not shown) housed inside the casing 2 is coaxially connected to the casing 2. A male screw for screwing the pressure gauge A into a conduit (not shown) is formed on the outer periphery of the member 8.

On the other hand, as shown in FIG. 2, another type of Bourdon tube pressure system B is known. In this case, the joint member 8a is connected in a direction perpendicular to the axis of the casing 2 via a support portion 10 fixed to the side surface of the casing 2. A male screw is formed on the outer periphery of the joint member 8a.

Bourdon tube type pressure gauges A and B having the above configuration are fixed by screwing the coupling members 8 and 8a into the predetermined installation locations of the pipelines with sealing tape wrapped around them to prevent fluid leakage. . In this case, the Bourdon tube type pressure gauges A and B are selectively installed depending on the piping condition of the pipeline in the pressure fluid system or the situation of the place where the pressure gauge is installed. In other words, when installing a pressure gauge in a pipe line (not shown),
A display section 4 is provided in a pressure gauge using joint members 8, 8a connected coaxially to the casing 2 or orthogonally to the axis, at a convenient position for visually checking the fluid pressure. One of the Bourdon tube pressure gauges A and B is selected after taking into consideration whether the

However, in the above method, the type of pressure gauge to be installed must be determined after taking into consideration various conditions such as the piping condition of the pipeline and the ease of visual recognition of pressure values, which is complicated. In addition, in a complex pressure fluid system, when pressure must be attached to a part where fluid pressure equipment and various piping are complicated,
It has been pointed out that simply selecting and installing the above-mentioned models is not enough, and as a result, a situation arises in which pressure confirmation work cannot be done easily.

[Purpose of the invention] The present invention has been made to overcome the above-mentioned disadvantages, and is applicable to pressure gauges such as Bourdon tube pressure gauges that detect fluid pressure by utilizing deformation of an elastic member caused by pressure fluid. , a pointer that rotates in accordance with the amount of deformation of the elastic member is bent, and scale display portions are provided on the front and side surfaces of the cover of the pressure gauge, and the bent portion of the pointer is formed on the scale on the front and side surfaces of the cover. The pressure gauge is configured to perform a pressure display function on either of the display sections, thereby making the pressure gauge visible from two directions, for example, directions orthogonal to each other. The purpose is to provide a pressure gauge with rich functionality.

[Means for Achieving the Object] In order to achieve the above-mentioned object, the present invention deforms a Bourdon tube disposed within the instrument body by sensing a pressure fluid, and as a result of the deformation of the Bourdon tube. A pressure gauge that displays pressure with a rotating pointer, the pointer having a first indicator part and a second indicator part that indicate pressure values corresponding to each bent part formed in the same pointer. A scale display section is provided on a side surface and a front surface of the meter body, and the scale display section is arranged on the side surface of the meter body, and the scale display section is arranged on the side surface of the meter body, and a first indicator is provided to read the pressure value using the first indicator. The instrument consists of a scale 1 and a second scale arranged on the front part of the instrument body and reads the pressure value by the second indicator, and the first scale and the second scale are based on the same scale value. It is characterized by being graduated.

[Embodiments] Next, preferred embodiments of the pressure gauge according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 3, reference numeral 20 indicates a pressure gauge according to the present invention. This pressure gauge 20 includes a body 22 and a cover 2 attached to the body 22 and having a scale drawn thereon for displaying fluid pressure in an analog manner.
It basically consists of 4. The body 22 includes a joint portion 26 for attaching the pressure gauge 20 to a fluid pipeline or the like.

First, the joint portion 26 is composed of a cylindrical member 30 having a male screw portion 28 formed on its outer periphery and a hexagonal nut portion 32. In this case, the passage 34 for introducing pressure fluid is connected to the cylindrical member 30 and the hexagonal nut part 32.
It is defined by penetrating through it. Next, a casing 36 is connected to the hexagonal nut portion 32.
The casing 36 is coaxially connected to the joint portion 26 and has a cylindrical shape with a wider diameter. A groove 40 around which a cover 24, the details of which will be described later, engages, is formed on the outer peripheral surface of the cylindrical portion 38 constituting the casing 36.

Therefore, the open end of the Bourdon tube 42 is welded to the passage 34 airtightly by brazing or the like (see FIG. 4). In this case, the Bourdon tube 42 is made of a soft and highly elastic metal material such as phosphor bronze or brass. It is a so-called spiral Bourdon tube,
A tube with one end closed is rolled to obtain a closed tube having an elliptical or oblong cross section, which is further formed into a spiral shape.

On the other hand, a pointer 46 is fixed at a predetermined position near the closed end 44 by brazing or the like. As can be understood from the figure, the pointer 46 has a predetermined shape with the tip bent at a right angle. On the other hand, a second indicator 50 is provided which is bent at 90° in the axial direction, and both are configured to be able to indicate pressure values.

Next, the cover 24 will be explained. This cover 24 is integrally molded from synthetic resin or the like. In FIG. 3, the cylindrical side portion 60 of the cover 24 has a cylindrical portion 3 of the casing 36.
A peripheral wall portion 62 is formed to fit with the groove 40, and a plurality of inwardly protruding protrusions 64 for engaging with the groove 40 are formed at predetermined positions near the tip of the peripheral wall portion 62. Note that a plurality of the protrusions 64 may be arranged unevenly below the cover 24 in the figure, for example. This is suitable as a mark for identifying the upper and lower sides when drawing a scale (described later) for displaying pressure on the cover 24.

On the other hand, the side portions 60 and front portion 66 of the cover 24 are provided with transparent display windows 68 and 70, an example of which is shown in FIG. in this case,
A first scale 71 for pressure display is drawn on the display window 68, and a second scale 73, which is the same as the first scale 71, is provided on the front surface 66. Therefore, the first pointer constituting the pointer 46
The instruction section 48 instructs the first scale 71 displayed on the display window section 68, and the second instruction section 50 instructs the first scale 71 displayed on the display window section 7.
It will be appreciated that the second scale 73 may be displayed as zero. In this case, 0 to 10Kg/cm ²
The Bourdon tube 42 is selected to have elasticity that allows pressure measurement in the range of .

The pressure gauge according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, a sealing tape for preventing fluid leakage is wrapped around the male screw part 28 formed in the joint part 26 constituting the pressure gauge 20, and the tape is screwed onto a fluid conduit (not shown). As a result, the pressure gauge 20 will be installed.

When pressure fluid flows through the fluid conduit in this state, a portion of this pressure fluid is introduced into the Bourdon tube 42 via the passage 34. This Bourdon tube 42
The pressure fluid filling the inside of the Bourdon tube 42 deforms the spiral tube so that its radius expands against the elasticity of the Bourdon tube 42 itself. In this case, one end of the Bourdon tube 42 is a fixed end inserted into the passage 34, and the other end 44 is a free end.
As a result of the entire tube body of the Bourdon tube 42 being bent to increase its radius, this end portion 44 is displaced in the direction of arrow B in FIG. Therefore, the pointer 46 fixed to the end portion 44 also substantially rotates with the displacement, and the pressure value of the pressure fluid corresponding to the amount of displacement is indicated on the display windows 68, 70. Become.
In this way, the pressure value can be visually checked from two directions perpendicular to each other, so it can be installed at any position regardless of the installation location.

In addition, during daily maintenance and inspection work, the situation where the indicated pressure value is difficult to read depending on the situation of the place where the pressure gauge is installed is completely eliminated, which has the advantage of making maintenance and inspection work even easier. .

[Effects of the invention] As described above, according to the invention, a pointer attached to an elastic member such as a Bourdon tube that is displaced by introduction of pressure fluid is bent, and two points are formed corresponding to the pointer. Since the scale is provided on the front and side of the cover so that the pressure value can be read from any direction, it is not affected by the location where the pressure gauge is installed. Therefore, for example, when installing a large number of pressure gauges in a factory, etc., there is no need to prepare multiple types of pressure gauges, making it possible to reduce installation costs and streamline material management. Effects can be obtained. Moreover, since pressure values can be visually checked from multiple directions during daily maintenance and inspection, there is an advantage that the work becomes easier.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to this embodiment. Of course, various improvements and changes in design are possible without departing from the gist of the present invention, such as by adopting a configuration in which the pointer exhibits a bent shape is rotated in proportion to the displacement of the pointer.

[Brief explanation of the drawing]

FIG. 1 is an explanatory perspective view of the external appearance of a Bourdon tube pressure gauge according to the prior art, FIG. 2 is an explanatory perspective view of the external appearance showing another example of the Bourdon tube pressure gauge according to the prior art, and FIG. FIG. 4 is an exploded perspective view of the pressure gauge according to the present invention. 20...Pressure gauge, 22...Body, 24...Cover, 26...Joint part, 34...Passage, 42...
Bourdon tube, 46...pointer, 48, 50...instruction section, 68,70...display window section.

Claims (1)

[Claims for Utility Model Registration] A pressure gauge that deforms a Bourdon tube disposed within the meter body by sensing pressure fluid, and displays pressure with a pointer that rotates as the Bourdon tube deforms. The pointer has a first indicator portion and a second indicator portion that indicate pressure values corresponding to each bent portion formed in the same pointer, and a side portion and a front portion of the instrument body. is provided with a scale display section, the scale display section is arranged on the side surface of the instrument body, and the first scale for reading the pressure value by the first indicator, and the first scale arranged on the front section of the instrument body, A pressure gauge comprising: a second scale for reading a pressure value by the second indicator, wherein the first scale and the second scale are graduated with the same scale value.