KR102681186B1 - Pressure measuring device having enhanced remained vapor removal rate - Google Patents

Abstract

The pressure measuring device with improved residual gas removal rate includes a pressure gauge, discharge unit, and discharge valve. The pressure gauge includes a main body part that measures pressure, a coupling part that extends from the main body and is coupled to a piping part through which fluid flows or a container in which fluid is stored, and a diaphragm part located inside the coupling part. The discharge unit is connected to the pressure gauge to extend inside the coupling portion, and includes a discharge pipe that discharges residual gas inside the coupling portion. The discharge valve is connected to the discharge pipe from the outside of the pipe portion and controls the operation of the discharge pipe.

Description

Pressure measuring device with improved residual gas removal rate {PRESSURE MEASURING DEVICE HAVING ENHANCED REMAINED VAPOR REMOVAL RATE}

The present invention relates to a pressure measuring device, and more specifically, when measuring the pressure of an incompressible fluid, it solves the problem of inaccurate measurement of pressure unintentionally introduced into the measuring device by effectively removing the introduced gas, quickly and This relates to a pressure measuring device with improved residual gas removal rate that enables precise pressure measurement.

Conventionally, in measuring the pressure of a liquid as an incompressible fluid, a pressure gauge 30 using a diaphragm 33 as shown in FIG. 1B is widely used.

That is, as shown in FIG. 1A, the pressure measurement system 10 is connected directly to the piping system 1 or on the piping part 20 of the sub-piping 2 extending from the piping system 1, and has the structure shown in FIG. 1B. ) has been mainly used.

In this conventional pressure measurement system 10, the pressure inside the piping unit 20 is transmitted to the surface of the diaphragm 33 located inside the pressure gauge, causing deformation, and at this time, the strain rate of the diaphragm 33 is Pressure is measured by converting it into an electrical signal.

However, as shown in Figure 1b, when measuring the pressure of the liquid 50 using the conventional pressure measurement system 10, the piping part 20, especially the expansion part 22 to which the pressure gauge 30 is connected, is Gas unintended by the user may remain in the area adjacent to the diaphragm 33, and this residual gas 60 causes the problem of inaccurate pressure sensing results.

In particular, this problem is that when a sudden pressure change occurs, the force due to pressure can be used to compress the residual gas 60 before it is transmitted to the diaphragm 33, and thus the difference between the actual pressure and the measured pressure is There was a growing problem.

Therefore, in order to improve the accuracy of pressure measurement results and measure pressure changes more precisely, it is necessary to more effectively discharge the residual gas 60 remaining inside the piping unit 20 to the outside, and research and development on this is necessary. The need for is also increasing.

Japanese Patent No. 3189341 Japanese Patent No. 4631844

Accordingly, the technical problem of the present invention was conceived from this point, and the purpose of the present invention is to solve the problem of inaccurate pressure measurement due to residual gas unintentionally introduced into the measuring device when measuring the pressure of an incompressible fluid. The aim is to provide a pressure measuring device with improved residual gas removal rate that enables fast and precise pressure measurement by effectively removing the introduced gas.

A pressure measuring device according to an embodiment for realizing the object of the present invention described above includes a pressure gauge, a discharge unit, and a discharge valve. The pressure gauge includes a main body portion that measures pressure, a coupling portion extending from the main body portion and coupled to a container in which a fluid is located or a piping portion through which a fluid flows, and a diaphragm portion located inside the coupling portion. The discharge unit is connected to the pressure gauge to extend inside the coupling portion, and includes a discharge pipe that discharges residual gas inside the coupling portion. The discharge valve is connected to the discharge pipe from the outside of the pipe portion and controls the operation of the discharge pipe.

In one embodiment, the discharge unit may be detachably connected to the pressure gauge.

In one embodiment, the discharge unit may further include a fixing plate that fixes the discharge pipe to be located inside the coupling portion.

In one embodiment, the fixing plate includes an external frame fixed to the inner surface of the coupling part or the inner surface of the piping part, an inner frame formed inside the external frame to fix the discharge pipe, and the external frame and the It may include a connection frame connecting internal frames.

In one embodiment, the pressure gauge may further include a fixing unit that is spaced apart from the diaphragm by a predetermined distance and is fixed to the inside of the coupling portion.

In one embodiment, the fixing plate contacts the fixing unit and its position is fixed, and the discharge pipe may extend through the fixing plate.

In one embodiment, the fixing plate contacts the end surface of the coupling part and its position is fixed, and the discharge pipe may pass through the fixing plate and be positioned adjacent to the diaphragm.

In one embodiment, the coupling part may include a first coupling part extending from the main body part, and a second coupling part extending from the first coupling part and having an inner diameter larger than the inner diameter of the first coupling part.

In one embodiment, the discharge unit may further include a fixing plate located on a step between the first coupling part and the second coupling part.

In one embodiment, the diaphragm portion may be located inside the first coupling portion, and the discharge pipe may extend through the fixing plate.

In one embodiment, the discharge pipe may extend through the pipe portion and into the coupling portion along the pipe portion.

In one embodiment, a through hole is formed in the coupling portion, and the discharge pipe may extend inside the coupling portion through the through hole.

In one embodiment, the discharge pipe may be directly connected to the coupling portion from the outside of the pipe portion.

According to embodiments of the present invention, since the discharge pipe extends inside the coupling portion and is positioned adjacent to the diaphragm, residual gas remaining adjacent to the diaphragm can be effectively removed, thereby improving the accuracy of pressure measurement. You can do it. In particular, when a sudden pressure change occurs, the force due to the pressure is not used to compress the residual gas but is directly transmitted to the diaphragm, thereby improving the accuracy of pressure measurement and allowing minute pressure changes to be measured more precisely. .

In addition, the discharge unit including the discharge pipe is detachably connected to the pressure gauge, and can be combined with a conventionally manufactured pressure gauge, thereby increasing its usability. Furthermore, in manufacturing the pressure gauge, by manufacturing it so that it can be combined with an exhaust unit, usability can be improved by removing residual gas through combination with an exhaust unit only in environments where a large amount of residual gas is generated.

In this case, the position of the discharge pipe within the coupling portion is fixed through a separate fixing plate, and thus a stable coupling state can be maintained to effectively discharge residual gas.

Meanwhile, the fixing structure of the discharge pipe can be designed in various ways. The fixing plate can be positioned by sliding it inside the connection using a separate fixing unit, or the fixing plate can be formed to have a step to slide the fixing plate inside the connection. You can place it by placing it on the side, or you can place a fixing plate on the end face of the joint. Through this, it is possible to secure diversity in design by considering various installation environments, such as the structure of the piping section where the pressure gauge is installed.

Furthermore, the discharge pipe may be designed to be connected directly to the joint from the outside without penetrating the pipe section, and this can also ensure diversity in design by considering various installation environments.

FIG. 1A is an exemplary diagram showing a state in which a pressure measuring device according to the prior art is connected to a pipe, and FIG. 1B is a cross-sectional view showing the internal structure of the pressure measuring device of FIG. 1A.
Figure 2 is a cross-sectional view showing a pressure measuring device according to an embodiment of the present invention.
Figure 3 is a plan view showing the fixing plate of Figure 2.
Figure 4 is a cross-sectional view showing a pressure measuring device according to another embodiment of the present invention.
Figure 5 is a cross-sectional view showing a pressure measuring device according to another embodiment of the present invention.
Figure 6 is a cross-sectional view showing a pressure measuring device according to another embodiment of the present invention.

Since the present invention can be subject to various changes and can have various forms, embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components. Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The above terms are used only for the purpose of distinguishing one component from another. The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “consist of” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted in an ideal or excessively formal sense unless explicitly defined in the present application. No.

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

Figure 2 is a cross-sectional view showing a pressure measuring device according to an embodiment of the present invention. Figure 3 is a plan view showing the fixing plate of Figure 2.

First, referring to FIG. 2, the pressure measuring device 100 according to this embodiment is coupled to the sub-piping 2 of the piping system 1 as illustrated in FIG. 1A, and Measures the pressure or pressure change of the fluid 50, such as an incompressible fluid located inside.

In this case, although not shown, the pressure measuring device 100 may be coupled to a container in which the fluid 50 is stored.

For this purpose, the pressure measuring device 100 is connected to the piping unit 20 installed at the end of the sub-pipe 2, and the pressure measuring device 100 is connected to the piping system 1 of various structures already installed in the related art. is coupled to the piping unit 20 to measure pressure.

In general, this piping part 20 includes an extension part 21 extending in one direction and containing the fluid 50 therein, and an extension part 22 formed at the end of the extension part 21. do.

Meanwhile, the extension portion 22 may have an outer diameter larger than the outer diameter of the extension portion 21, and the inner diameter of the extension portion 22 may also be larger than the inner diameter D1 of the extension portion 21. . Accordingly, a predetermined coupling step 23 may be formed between the extension portion 22 and the extension portion 21, and the pressure gauge 200, which will be described later, is coupled and positioned on the coupling step 23. do.

Of course, the outer diameter of the extension part 22 may be formed to be the same as the outer diameter of the extension part 21, and in this case, there is a predetermined coupling step between the extension part 22 and the extension part 21. (23) can be formed.

It is obvious that the structure or shape of the piping unit 20 described above can be varied in various ways, and the structure or shape of the pressure measuring device 100, which will be described later, to match the structure or shape of the piping unit, is also within a self-evident range. It can be changed within. However, for convenience of explanation, the piping unit 20 having the structure shown in FIG. 2 will be described below as an example.

Specifically, the pressure measuring device 100 according to this embodiment includes a pressure gauge 200, a discharge unit 300, and a discharge valve 400.

The pressure gauge 200 is coupled to the piping part 20 to measure the pressure or pressure change of the fluid 50 inside the piping part 20, and includes a main body 210, a coupling part 220, It includes a diaphragm portion 230 and a fixing unit 240.

Although not shown in detail, the main body 210 is provided with a sensor (not shown) inside to sense the pressure caused by deformation of the diaphragm 230. Since the sensing mechanism of this sensor corresponds to the prior art, detailed information is provided. The explanation is omitted.

In this case, the main body portion 210 is located outside the upper part of the piping portion 20, and although it is illustrated in the drawing as having a block shape such as a circle or a square, its shape and size may be variable. there is.

The coupling portion 220 extends from the lower part of the main body 210 and is coupled to the expansion portion 22 of the piping portion 20.

In this case, the coupling portion 220 may extend to have a second inner diameter (D2), and the second inner diameter (D2) may be the first inner diameter ( It may be smaller than D1). Accordingly, the residual gas 60 can be located inside the coupling portion 220, which forms a relatively narrow space, and thus the residual gas 60 can be removed more effectively.

The coupling portion 220 is located on the coupling step 23 between the expansion portion 22 and the extension portion 21 along the inner peripheral surface of the expansion portion 22 and is coupled to the piping portion 20. You can.

In this case, although not shown in detail, the coupling portion 220 may be coupled to the piping portion 20 through a screw coupling, may be coupled by simply sliding, or may be coupled in an inserted form. may be possible, and the method of combination is not limited.

In other words, the coupling method or structure of the coupling part 220 can be designed considering the shape or structure of the existing piping part 20, and through this, the pressure gauge 200 is installed on the piping part 20. It becomes detachable.

The diaphragm portion 230 is located in the internal space formed by the coupling portion 220 and is positioned to be spaced a predetermined distance from the main body portion 210 on which the sensor (not shown) is provided.

The diaphragm 230 is, for example, a diaphragm, and comes into direct contact with the fluid 50 or the residual gas 60 flowing through the inside of the pipe 20. Therefore, as described above, it may be deformed depending on the pressure of the fluid 50, and this deformed state is sensed through the sensor.

The fixing unit 240 is located below the diaphragm 230 and is fixed on the coupling portion 220. In this case, the fixing unit 240 may have a plate shape with an open center, and accordingly, as shown, a predetermined step or blocking structure is formed between the fixing unit 240 and the coupling portion 220.

Furthermore, the length at which the fixing unit 240 is formed to protrude from the inner surface of the coupling portion 220 can be varied, and it is sufficient to allow the fixing plate 320, which will be described later, to be fixed in position. Thus, the fixing plate 320 is positioned on the fixing unit 240 formed in this way.

Meanwhile, inside the pressure measuring device 100 in this embodiment, residual gas that exists inside the fluid 50 and rises due to buoyancy, or residual gas introduced during the installation of the pressure measuring device 100, etc. gathered together and located.

That is, the residual gas 60 remains in the upper part of the internal space formed by the coupling portion 220. Considering the residual height of the residual gas 60, etc., the fixing unit 240 and the residual gas 60 remain in the upper part of the internal space formed by the coupling portion 220. The location of the discharge pipe 310 that discharges the gas 60 can be determined.

The fixing unit 240 fixes the fixing plate 320, which will be described later, and the discharge pipe 310 is located through the inside of the fixing plate 320.

In this case, in order to more effectively discharge the residual gas 60 through the discharge pipe 310, the fixing unit 240 is positioned at a point where the end of the discharge pipe 310 is adjacent to the diaphragm 230. It is desirable to position it so that it can be stably fixed.

The discharge unit 300 fixes the discharge pipe 310, which is a conduit (conduit) for discharging the residual gas 60 remaining inside the pipe portion 20 to the outside, and the position of the discharge pipe 310. It includes a fixing plate 320.

The structure of the discharge pipe 310 can be modified in various ways, and it is sufficient if it is designed to be introduced into the interior of the pipe 20 in any shape. However, since the discharge pipe 310 introduced into the piping unit 20 must remove the residual gas 60 to the outside of the piping unit 20, it is also connected to the outside of the piping unit 20. It has to be.

Accordingly, the discharge pipe 310 may extend to have an 'L' shape as shown, and may include a horizontal pipe 311 extending in the horizontal direction, and a horizontal pipe 311 extending from the horizontal pipe 311 and having a direction. It may include a vertical pipe 312 that is switched and extends in the vertical direction. Below, for convenience of explanation, the discharge pipe 310 will be described based on this example structure.

The horizontal pipe 311 may be introduced into the interior of the piping section 20 through the piping section 20 from the outside of the piping section 20, and the vertical pipe 312 may be connected to the piping section ( 20) It may extend internally in the direction in which the pipe part 20 extends, for example, in the vertical direction.

Meanwhile, the discharge pipe 310 may also be detachable from the piping unit 20. For this purpose, the piping unit 20 has a preset connection through which the piping unit 20 can be inserted inside. It can be.

In this way, the vertical pipe 312 extending in the vertical direction along the extension direction of the pipe section 20 inside the pipe section 20 is positioned so that its end is adjacent to the diaphragm section 230.

In this case, the fixing plate 320 is fixed to the end of the vertical pipe 312. As described above, the fixing plate 320 is positioned to contact the fixing unit 240 so that its position is It is fixed.

That is, the fixing plate 320 fixed to the end of the vertical pipe 312 moves upward along the inner space of the coupling portion 220 together with the vertical pipe 312, and the fixing unit 240 ) The position of the fixing plate 320 is fixed. Accordingly, the vertical pipe 312 is no longer close to the diaphragm 230, and its position is fixed at a predetermined distance away from the diaphragm 230.

As described above, the position where the fixing plate 320 is fixed and the position where the end of the vertical pipe 312 is fixed must ultimately correspond to the position where the residual gas 60 remains, and accordingly, the residual gas 60 remains. Discharging the gas 60 to the outside can be effectively performed.

In general, the residual gas 60 is a gas introduced into the measuring device and is formed in the uppermost layer of the fluid 50, so that the vertical pipe 312 is close to the diaphragm 230. When placed, the vertical pipe 312 is located at a location where the residual gas 60 remains.

Meanwhile, as shown in FIG. 3, the fixing plate 320 may have a structure for fixing the vertical pipe 312.

That is, the fixing plate 320 includes an external frame 321, an internal frame 322, and a connecting frame 323.

The outer frame 321 may be a circular frame shape having an outer diameter equal to the inner diameter formed by the coupling portion 220, and thus the outer frame 321 may be located on the inner diameter of the coupling portion 220. there is.

In addition, the inner frame 322 is a circular frame forming a predetermined fixing space 324 therein, and the inner diameter of the inner frame 322 may be substantially the same as the outer diameter of the vertical pipe 312, Accordingly, the vertical pipe 312 passes through the fixing space 324 of the internal frame 322 and is fixed to the internal frame 322.

Furthermore, the connecting frame 323 connects the external frame 321 and the internal frame 322 to each other, thereby improving the structural stability and fixing force of the internal frame 322.

The discharge valve 400 controls the opening and closing of the discharge pipe 310 and includes a valve unit 410 and a control unit 420.

That is, the valve unit 410 is provided on the horizontal pipe 311 and operates to open or close the horizontal pipe 311, and the control unit 420 operates the valve unit 410. You can control it.

Accordingly, the horizontal pipe 311 is opened when the residual gas 60 is removed to the outside, and is closed when the external removal is completed and the pressure is measured.

Furthermore, although not shown, a suction force is provided on the horizontal pipe 311 to the horizontal pipe 311 and the vertical pipe 312, that is, a force to suck in and discharge the residual gas 60 to the outside. A unit may be provided.

Figure 4 is a cross-sectional view showing a pressure measuring device according to another embodiment of the present invention.

The pressure measuring device 101 according to this embodiment is similar to the pressure measuring device 100 described with reference to FIG. 2, except that the fixing unit 240 is omitted and the structures of the coupling portions 251 and 252 are different. ) is substantially the same as Accordingly, the same reference numbers are used for the same components, and overlapping descriptions are omitted.

Referring to FIG. 4, in the pressure measuring device 101 according to this embodiment, the coupling portions 251 and 252 are comprised of a first coupling portion 251 and a second coupling portion 252.

The first coupling portion 251 extends from the lower part of the main body 210 and may have a second diameter D2. In this case, as described above, the second inner diameter D2 is smaller than the first inner diameter D1, which is the inner diameter of the extension portion 21.

Additionally, the second coupling portion 252 further extends from the end of the first coupling portion 251, and the second coupling portion 252 may have a third diameter D3. In this case, the third diameter D3 may be larger than the second diameter D2, but smaller than the first diameter D1.

Thus, the first coupling portion 251 and the second coupling portion 252 form a step portion 254.

In this case, the length of the first coupling portion 251 and the length of the second coupling portion 252 may be designed in various ways. However, as will be described later, the fixing plate 321 is located on the step portion 254, and the end of the vertical pipe 312 is located through the fixing plate 321, so the step portion 254 and The length of the first and second coupling parts 251 and 252 may be designed so that the residual gas 60 can be located in the space between the diaphragms 230.

Meanwhile, in this embodiment, the second coupling portion 252 is coupled to the expansion portion 22, and the coupling structure and coupling relationship are the same as those described with reference to FIG. 2.

As described above, in this embodiment, the second coupling portion 252 forms a third inner diameter D3 and forms a step portion 254 with the first coupling portion 251.

Accordingly, the fixing plate 321 included in the discharge unit 301 in this embodiment contacts the step portion 254 and its position is fixed. That is, the fixing plate 321 inserted from the outside slides or moves along the inner surface 253 of the second coupling portion 252 and is finally fixed on the step portion 254.

Accordingly, the vertical pipe 312 fixed to the fixing plate 321 is also positioned close to the step portion 254, like the fixing position of the fixing plate 321. For example, the end of the vertical pipe 312 may penetrate the fixing plate 321 and be located in the space between the fixing plate 321 and the diaphragm 230.

Accordingly, the residual gas 60 located between the fixing plate 321 and the diaphragm 230 is discharged to the outside through the vertical pipe 312.

In this case, the structure of the fixing plate 321 and the fixed state of the vertical pipe 312 may be substantially the same as those described with reference to FIG. 3.

Figure 5 is a cross-sectional view showing a pressure measuring device according to another embodiment of the present invention.

The pressure measuring device 102 according to this embodiment is similar to the pressure measuring device 100 described with reference to FIG. 2, except that the fixing unit 240 is omitted and the structure and arrangement of the fixing plate 322 are different. ) is substantially the same as Accordingly, the same reference numbers are used for the same components, and overlapping descriptions are omitted.

Referring to FIG. 5, in the pressure measuring device 102 according to this embodiment, the pressure gauge 202 does not include a separate fixing unit, and accordingly, the fixing plate 322 of the discharge unit 302 is also connected to the above-described combination. It is fixed to the outside of the unit 220.

Specifically, the coupling portion 220 has a second inner diameter D2 that is the same inner diameter from the lower portion of the main body 210 as shown in FIG. 2 and extends downward. Additionally, the diaphragm portion 230 is located in the inner space of the coupling portion 220.

Furthermore, a predetermined coupling space 231 is formed inside the coupling part 220 below the diaphragm 230, and residual gas 60 remains inside the coupling space 231. .

Meanwhile, the second inner diameter D2, which is the inner diameter of the coupling part 220, is smaller than the first inner diameter D1, which is the inner diameter of the extension part 21 of the piping part 20, as shown in FIG. 5. As shown, the end surface 232 of the coupling portion 220 protrudes toward the inside of the expanded portion 22 and forms a predetermined step between the inner peripheral surface of the expanded portion 22.

Accordingly, if the fixing plate 322 is formed to have an outer diameter that is substantially the same as the first inner diameter D1, the fixing plate 322 has an inner diameter of the extension part 21 and the extension part 22. It may be moved along and its position fixed on the end surface 232.

Therefore, in this embodiment, a unit for fixing the fixing plate 320 (see Fig. 2), such as a separate fixing unit 240 (see Fig. 2), is not provided inside the coupling portion 220, and the The end surface 232 of the coupling portion 220 performs a fixing role.

Meanwhile, the fixing plate 322 is fixed on the relatively lower end surface 232 of the coupling portion 220, and the vertical pipe 312 passes through the fixing plate 322 and passes through the relatively high end surface 232 of the coupling portion 220. It must be brought into position.

That is, the vertical pipe 312 passing through the fixing plate 322 must be located inside the coupling space 231 to the space where the residual gas 60 remains. However, since the residual gas 60 is located in a space relatively adjacent to the diaphragm 230, that is, at the uppermost part of the coupling space 231, the vertical pipe 312 is connected to the diaphragm 230. It must be located at a height close to .

Therefore, in this embodiment, based on the length (L) information between the diaphragm 230 and the end surface 232, the vertical pipe 312 must rise through the fixing plate 322. The length is determined.

In particular, the pressure measuring device 102 in this embodiment is detachable from the already manufactured piping section 20, and further, the pressure gauge 202 is attached to the piping section 20. , the discharge unit 302 may be additionally attached to the pressure gauge 202.

Accordingly, if information on the length (L) between the diaphragm 230 and the end surface 232 is provided as information about the pressure gauge 202, the discharge unit additionally coupled to the pressure gauge 202 ( The design value of 302) can be secured, and a discharge unit matching the length (L) can be selected and coupled to the pressure gauge 202.

As described above, it is coupled to the pressure gauge 202 having an existing structure, and the fixing plate 322 is fixed on the end surface 232, and the vertical pipe 312 passes through the fixing plate 322. By being positioned to extend by a predetermined length, the residual gas 60 remaining in the space adjacent to the diaphragm 230 can be effectively discharged.

Therefore, the pressure measuring device 102 in this embodiment can be applied without changing the previously manufactured pressure gauge 202.

Figure 6 is a cross-sectional view showing a pressure measuring device according to another embodiment of the present invention.

The pressure measuring device 103 according to this embodiment is similar to the pressure described with reference to FIG. 2, except that the fixing unit 240 and the fixing plate 320 are omitted and the structure of the discharge pipe 330 is different. It is substantially the same as the measuring device 100. Accordingly, the same reference numbers are used for the same components, and overlapping descriptions are omitted.

Referring to FIG. 6, in the pressure measuring device 103 according to this embodiment, the discharge pipe 330 of the discharge unit 303 penetrates the side of the coupling portion 220 of the pressure gauge 203 and directly It extends into the inner space of the coupling portion 220.

That is, the pressure gauge 203 includes a separate through hole 260 formed on the side of the coupling portion 220, and the discharge pipe 330 is introduced through the through hole 260.

At this time, the through hole 260 may be formed at a lower position than the diaphragm 230, considering the position of the diaphragm 230. This is because, as described above, the residual gas 60 is located in a space adjacent to the diaphragm 230, so the residual gas 60 can be effectively discharged.

In addition, although not shown, the through hole 260 is not always open and can be formed to be open and closed. Accordingly, when the pressure gauge 203 is coupled to the pipe portion 20, the through hole 260 is not always open. In a situation where discharge of the residual gas 60 is required, the discharge pipe 330 can be extended to the inside of the coupling portion 220 while opening the through hole 260.

Furthermore, the discharge pipe 330 may extend in the horizontal direction as shown, but the direction of extension is not limited, and the discharge pipe 330 is connected to the coupling portion 220 in consideration of ease of attachment and detachment. It extends so as to penetrate the bay, and may be positioned so as not to penetrate the extension portion 21 or the extension portion 22 of the pipe portion 20.

As described above, in the case of this embodiment, the discharge unit 303 can be easily attached and detached from the pressure gauge 203 through a configuration in which the discharge pipe is directly introduced through the side of the coupling portion, and through this, the residual gas can be easily removed. Discharge can be performed.

According to the embodiments of the present invention as described above, the discharge pipe extends inside the coupling portion and is located adjacent to the diaphragm, so that residual gas remaining adjacent to the diaphragm can be effectively removed, thereby enabling the measurement of pressure. Accuracy can be improved. In particular, when a sudden pressure change occurs, the force due to the pressure is not used to compress the residual gas but is directly transmitted to the diaphragm, thereby improving the accuracy of pressure measurement and allowing minute pressure changes to be measured more precisely. .

In addition, the discharge unit including the discharge pipe is detachably connected to the pressure gauge, and can be combined with a conventionally manufactured pressure gauge, thereby increasing its usability. Furthermore, in manufacturing the pressure gauge, by manufacturing it so that it can be combined with an exhaust unit, usability can be improved by removing residual gas through combination with an exhaust unit only in environments where a large amount of residual gas is generated.

In this case, the position of the discharge pipe within the coupling portion is fixed through a separate fixing plate, and thus a stable coupling state can be maintained to effectively discharge residual gas.

Meanwhile, the fixing structure of the discharge pipe can be designed in various ways. The fixing plate can be positioned by sliding it inside the connection using a separate fixing unit, or the fixing plate can be formed to have a step to slide the fixing plate inside the connection. You can place it by placing it on the side, or you can place a fixing plate on the end face of the joint. Through this, it is possible to secure diversity in design by considering various installation environments, such as the structure of the piping section where the pressure gauge is installed.

Furthermore, the discharge pipe may be designed to be connected directly to the joint from the outside without penetrating the pipe section, and this can also ensure diversity in design by considering various installation environments.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the following patent claims. You will understand that it is possible.

50: fluid 60: residual gas
100, 101, 102, 103: Pressure measuring device
200, 201: pressure gauge 220, 250: coupling part
230: Diaphragm 240: Fixing unit
300, 301, 302, 303: Discharge unit
320, 321, 322: Fixed plate
310, 330: Discharge pipe 400: Discharge valve
410: valve unit 420: control unit

Claims (13)

A pressure gauge including a main body portion that measures pressure, a coupling portion extending from the main body portion and coupled to a piping portion through which fluid flows, and a diaphragm portion located inside the coupling portion;
a discharge unit connected to the pressure gauge to extend inside the coupling portion and including a discharge pipe for discharging residual gas inside the coupling portion; and
A discharge valve connected to the discharge pipe on the outside of the piping unit and controlling the operation of the discharge pipe,
The discharge unit is a pressure measuring device, characterized in that it further includes a fixing plate for fixing the discharge pipe to be located inside the coupling portion. The method of claim 1, wherein the discharge unit,
A pressure measuring device characterized in that it is detachably connected to the pressure gauge. delete The method of claim 1, wherein the fixing plate is:
an external frame fixed on the inner surface of the coupling part or the inner surface of the piping part;
an inner frame formed inside the outer frame to secure the discharge pipe; and
A pressure measuring device comprising a connection frame connecting the external frame and the internal frame. The method of claim 1, wherein the pressure gauge is:
A pressure measuring device further comprising a fixing unit spaced apart from the diaphragm by a predetermined distance and fixed to the inside of the coupling portion. According to clause 5,
The fixing plate contacts the fixing unit and its position is fixed,
A pressure measuring device, wherein the discharge pipe extends through the fixing plate. According to paragraph 1,
The fixing plate contacts the end surface of the coupling portion and its position is fixed,
A pressure measuring device, wherein the discharge pipe penetrates the fixing plate and is located adjacent to the diaphragm. A pressure gauge including a main body portion that measures pressure, a coupling portion extending from the main body portion and coupled to a piping portion through which fluid flows, and a diaphragm portion located inside the coupling portion;
a discharge unit connected to the pressure gauge to extend inside the coupling portion and including a discharge pipe for discharging residual gas inside the coupling portion; and
A discharge valve connected to the discharge pipe on the outside of the piping unit and controlling the operation of the discharge pipe,
The coupling part,
a first coupling portion extending from the main body portion; and
It extends from the first coupling part and includes a second coupling part having an inner diameter larger than the inner diameter of the first coupling part,
The discharge unit is a pressure measuring device, characterized in that it further includes a fixing plate located on a step between the first coupling part and the second coupling part. delete According to clause 8,
The diaphragm portion is located inside the first coupling portion,
A pressure measuring device, wherein the discharge pipe extends through the fixing plate. According to any one of claims 1, 2, 4 to 8, and 10, the discharge pipe is,
A pressure measuring device, characterized in that it penetrates the piping part and extends inside the coupling part along the piping part. delete delete

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