TWI617794B - Pressure gauge - Google Patents

Abstract

A pressure gauge for allowing a fluid to enter and measuring a pressure value of the fluid, comprising a cylinder block having a cylinder chamber, and a detecting unit mounted on the cylinder block, a display unit having a phase a first diaphragm, a second diaphragm, and a connecting rod positioned between the first diaphragm and the second diaphragm, the first diaphragm and the second diaphragm and The cylinder chamber is partitioned into a first space into which the fluid can flow, and a second space and a third space respectively located on opposite sides of the second diaphragm, and the display unit is coupled to the second diaphragm. By the barrier of the first diaphragm and the second diaphragm and the connection of the connecting rod, fluid corrosion of the second diaphragm can be avoided, and the accuracy of the pressure gauge measurement can be improved.

Description

pressure gauge

The present invention relates to a pressure gauge, and more particularly to a pressure gauge for measuring the pressure value of a fluid.

Referring to Fig. 1, there is a new patent of the number No. M368063, which discloses a pressure gauge 1 for detecting the pressure of a fluid in a test object 10, the pressure gauge 1 comprising a cylinder block 11, and being mounted in the cylinder A detecting unit 12 and a display unit 13 on the seat 11. The cylinder block 11 has a lower cylinder block 111 communicating with the object to be tested 10, and an upper cylinder block 112 coupled to the lower cylinder block 111, and defined between the lower cylinder block 111 and the upper cylinder block 112. A cylinder chamber 113 is provided.

The detecting unit 12 has a diaphragm 121 which is disposed above and below and is sandwiched between the lower cylinder 111 and the upper cylinder 112, and a rupture disk 122. The diaphragm 121 partitions the cylinder chamber 113 into a A first space 114 located below and communicating with the object to be tested 10, and a second space 115 above the diaphragm 121, the rupture disk 122 is used to prevent the diaphragm 121 from being excessively deformed. The display unit 13 has a connecting base 131, a screw 132 for coupling the connecting seat 131 and the diaphragm 121, and a display assembly 133 connected to the connecting base 131 and capable of displaying a pressure change, since the connecting base is The change of the 131 lifting amplitude into the pressure value through the display component 133 is not the improvement focus of the present invention. The new patent No. M368063 is also described, and therefore will not be described again.

Although the aforementioned novel patent can achieve the purpose of measuring pressure by the cooperation of components, in the case where the pressure of the fluid is generally required to be detected, the fluid is often a corrosive chemical, and the aforementioned new patent enters the cylinder when used. The first space 114 of the chamber 113, and the diaphragm 121 and the screw 132 are both facing the first space 114. Therefore, during the measurement of the pressure, the diaphragm 121 and the screw 132 are corrosive. In fluid contact, not only the components are easily damaged, but also the service life is short, and the pressure gauge 1 is also prone to problems of measurement inaccuracy.

It is an object of the present invention to provide a pressure gauge that overcomes at least one of the disadvantages of the prior art.

The pressure gauge of the present invention is capable of entering a fluid and measuring the pressure value of the fluid, comprising: a cylinder block, a detecting unit, and a display unit having a first cylinder and a second cylinder The first cylinder and the second cylinder together define a cylinder chamber, and the detecting unit has a first diaphragm, a second diaphragm spaced apart from the first diaphragm, and a linkage position a connecting rod between the first diaphragm and the second diaphragm, the cylinder chamber having a first space between the first diaphragm and the first cylinder and allowing fluid to enter, and an a second space between the first diaphragm and the second diaphragm, and a third space between the second diaphragm and the second cylinder, the connecting rod is located in the second space, The display unit is mounted in the second cylinder and the third space, and is connected to the second diaphragm.

The beneficial effects of the present invention are that the cooperation of the foregoing structure can prevent the second diaphragm from coming into contact with the fluid, and at the same time, the pressure of the fluid is amplified by the connection of the connecting rod to improve the measurement accuracy.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 2 and 3, a first embodiment of the pressure gauge of the present invention is for detecting the fluid pressure of a test object 10, which may be a gas or a liquid, the pressure gauge comprising: a cylinder block 2, and mounted on A detection unit 3 and a display unit 4 on the cylinder block 2. The cylinder block 2 has a first cylinder block 21 and a second cylinder block 22 which together define a hollow cylinder chamber 23. The first cylinder block 21 has an annular first clamping wall 211, a first base wall 212 spaced apart from the first clamping wall 211, and a first clamping wall 211 and the first base wall. A first surrounding wall 213 between the 212 has a first passage 214 for fluid to flow into the cylinder chamber 23.

The second cylinder 22 has a second clamping wall 221 that is clamped to the first clamping wall 211, a second base wall 222 spaced apart from the first base wall 212, and a second connection to the second base wall 222. a second surrounding wall 223 between the clamping wall 221 and the second base wall 222.

The detecting unit 3 is interposed between the first clamping wall 211 of the first cylinder 21 and the second clamping wall 221 of the second cylinder 22, and has a first diaphragm 31 and a rupture disk 32. a second diaphragm 33, a connecting rod 34 passing through the rupture disk 32 and interposed between the first diaphragm 31 and the second diaphragm 33, and a second diaphragm 33 interposed therebetween And the adapter ring 30 between the rupture disk 32. The cylinder chamber 23 has a first space 231 between the first diaphragm 31 and the first base wall 212, and a second space between the first diaphragm 31 and the second diaphragm 33. 232, and a third space 233 between the second diaphragm 33 and the second base wall 222 of the second cylinder 22.

The first diaphragm 31 has a main film layer 311 facing the first space 231, and a reinforcing layer 312 facing the second space 232. The main film layer 311 is made of a flexible material such as rubber or silicone. And having a first lip wall 313 resting on the first clamping wall 211 of the first cylinder 21, and a first main membrane wall 314 facing the first space 231, and the reinforcing layer 312 is For example, made of metal or hard plastic, which is bonded to the first main film wall 314 of the main film layer 311, and has an intermediate portion 315 and a plurality of reinforcing ribs extending from the intermediate portion 315 toward the radially outer end. 316. The rupture disk 32 is made of a hard material and has an explosion-proof clamping wall 321 between the first clamping wall 211 and the second clamping wall 221, and a reinforcing layer 312 with the first diaphragm 31. An explosion-proof main wall 322 spaced apart from above and below, the explosion-proof main wall 322 has a perforation 323 corresponding to the intermediate portion 315 of the reinforcing layer 312.

The second diaphragm 33 is made of a metal and plastic material which is flexibly deformable and has a resilient force, and has a second lip wall 331 corresponding to the second clamping wall 221 of the cylinder block 2, and a The second lip wall 331 has a second main film wall 332 extending in the middle and having a wave shape. The connecting rod 34 passes through the through hole 323 of the rupture disk 32 and is interlocked between the first diaphragm 31 and the second diaphragm 33. In order to increase the stability of the erection, the connecting rod 34 may be combined with one of the first diaphragm 31 and the second diaphragm 33. In the present embodiment, the top end of the connecting rod 34 protrudes from the second diaphragm 33, and the second diaphragm 33 is clamped together with the display unit 4.

The display unit 4 includes a connector 41 that is coupled to the second diaphragm 33 through the connecting rod 34, and a display assembly 42 that converts the height of the connector 41 into a pressure value. Since the height change of the connector 41 is expressed by a pressure value is a conventional technique, and is also disclosed in the new patent No. M368063, which will not be described in detail.

In the embodiment, when the pressure gauge is in use, the fluid of the object to be tested 10 enters the first space 231 of the cylinder chamber 23 via the first passage 214 of the cylinder block 2, and when the fluid enters the first space 231 When the first diaphragm 31 is deformed, the bottom of the connecting rod 34 is located at the intermediate portion 315 of the reinforcing layer 312 of the first diaphragm 31, and the reinforcing portion 316 is surrounded by the intermediate portion 315. Therefore, the first diaphragm 31 is easily connected to the first diaphragm 31 by the connection of the connecting rod 34 by the fluid pressure, and the second diaphragm 33 is accurately pushed. And the connecting seat 41 is moved up, and the lifting range is converted to the display assembly 42 to display the pressure value, so the pressure gauge of the embodiment can be used as a general pressure gauge.

It is further noted that the detecting unit 3 of the first embodiment of the present invention is a double diaphragm design, wherein the second diaphragm 33 that drives the display unit 4 to generate a pressure signal does not completely pass the fluid. Contacting, so that the second diaphragm 33 is not corroded by chemicals, and the first diaphragm 31 of the first space 231 facing the cylinder chamber 23 is not only preferred because of its two-layer structure. Structural strength and stability can also improve the anti-corrosion effect. Therefore, in addition to the novel structure, the first embodiment of the present invention can prevent the copper second diaphragm 33 from contacting the fluid, and is supported by the connecting rod 34 and connected to the first diaphragm 31 and the The design of the second diaphragm 33, and the connecting seat 41 of the display unit 4, which is also erected correspondingly to the connecting rod 34, can amplify the pressure of the fluid and thus improve the measurement accuracy of the pressure gauge.

Referring to FIG. 4, the configuration of a second embodiment of the pressure gauge of the present invention is similar to that of the first embodiment, except that the reinforcing layer 312 of the first diaphragm 31 has a disk shape, the reinforcing ribs. 316 is disposed at the same center, and by changing the structure of the reinforcing layer 312, the same object of the invention can be achieved.

Referring to Figures 5, 6, and 7, the configurations of the third embodiment, the fourth embodiment, and the fifth embodiment of the pressure gauge of the present invention are similar to those of the first embodiment, except that the first embodiment is The second diaphragm 33 has a disc shape, and the second diaphragm 33 of the third embodiment has a cross shape. The second diaphragm 33 of the fourth embodiment has an elongated shape. The fifth embodiment The second diaphragm 33 has a Y shape. That is, the second diaphragm 33 of the present invention does not need to have the function of sealing and sealing, and its shape can be selected from the group consisting of a disc shape, a cross shape, an elongated shape and a Y shape.

Referring to Figure 8, a sixth embodiment of the pressure gauge of the present invention can be used as a differential pressure gauge. To achieve the above object, the pressure gauge also includes the cylinder block 2, the detecting unit 3, and the display unit 4, the display The configuration of the unit 4 is the same as that of the first embodiment, and the configuration of the cylinder block 2 and the detecting unit 3 is similar to that of the first embodiment, except that the detecting unit 3 has the first diaphragm 31, the first The diaphragm 33, the adapter ring 30, and the connecting rod 34 further have a partition 35 between the first diaphragm 31 and the second diaphragm 33, and a clip is disposed on the connection. A leakage preventing ring 36 between the rod 34 and the separator 35. The partition piece 35 has a circumferential wall 351 interposed between the first clamping wall 211 and the second clamping wall 221, and a partition wall 352 connected between the circumferential wall 351. The circumferential wall 351 has a The second passage 353 is transverse, and the second space 232 of the cylinder chamber 23 has a pressure difference region 234 between the partition wall 352 and the first diaphragm 31. In addition to the separation of the pressure difference region 234, the partition wall 352 also has an explosion-proof effect.

When the pressure gauge is in use, a fluid A of the test object 10 enters the first space 231 via the first passage 214, and another fluid B with a lower pressure enters the second passage 353. In the differential pressure region 234 of the second space 232, the different pressure values generated by the fluid A and the fluid B will change the lifting amplitude of the connecting rod 34 and the second diaphragm 33, thereby measuring the fluid A and the fluid. The purpose of the pressure difference of B. Since the fluid A and the fluid B which measure the differential pressure flow into the differential pressure region 234 of the first space 231 and the second space 232 respectively, the fluid A and the fluid B do not act on the actual The display unit 4 is connected to the second diaphragm 33. Therefore, the sixth embodiment also has the advantages of accurate measurement and measurement member not coming into contact with chemicals.

Referring to Fig. 9, the configuration of a seventh embodiment of the pressure gauge of the present invention is similar to that of the first embodiment except that the first passage 214 is provided on the first surrounding wall 213. By changing the position of the first passage 214, the direction of fluid entry can be changed to facilitate the installation of the test object 10 of different structures.

It is further noted that, in addition to the functions described in the first embodiment, the embodiment of the present invention has a structure in which the detecting unit 3 is interposed between the first cylinder 21 and the second cylinder 22, It has the convenience of modularization. That is, as shown in FIG. 2 and FIG. 8, when the pressure gauge of the present invention is used as a general pressure gauge, the detection unit 3 may be interposed between the first cylinder 21 and the second cylinder 22. If it is to be used as a differential pressure gauge, the rupture disk 32 can be changed into the separator 35 and the leakage preventing ring 36. Therefore, the first cylinder 21 and the second cylinder 22 can be modularly produced. Different functions can be produced according to different functional requirements.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the simple equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still Within the scope of the invention patent.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 10········ The object to be tested 2········ ··Cylinder seat 21········ First cylinder 211······· First wall 212······ First base wall 213······ First circumference Wall 214······ First passage 22········ Second cylinder 221······ Second wall 222······ Second base wall 223··· ··· Second wall 23········ Cylinder room 231······ First space 232······ Second space 233······ Third space 234· ····· Pressure difference area 3···························································································· Wall 315······ Intermediate part 316······ Reinforced ribs 32········ Explosion-proof piece 321······ Explosion-proof wall 322······ Explosion-proof main wall 323······ Perforation 33········ The second diaphragm 331······ The second lip wall 332······ The second main membrane wall 34····· ··· Connecting rod 35········ Separator 351······ Circumference wall 352······ Wall 353······ Second channel 36········ Leakproof ring 4·········· Display unit 41········· ></tr></TBODY></TABLE>

31‧‧‧First diaphragm

311‧‧‧Main film

312‧‧‧ reinforcement layer

313‧‧‧First lip wall

42‧‧‧Display components

A‧‧‧ fluid

B‧‧‧ fluid

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a cross-sectional view of a new type of the patent number No. M368063; Figure 2 is a first embodiment of the pressure gauge of the present invention. Figure 3 is a plan view of the first embodiment, a first diaphragm of the pressure gauge is separately illustrated; Figure 4 is a plan view of a second embodiment of the pressure gauge of the present invention, which is described separately Figure 5 is a plan view of a third embodiment of the pressure gauge of the present invention, the second diaphragm is separately illustrated; Figure 6 is a plan view of a fourth embodiment of the pressure gauge of the present invention, separately illustrating the second film Figure 7 is a plan view of a fifth embodiment of the pressure gauge of the present invention, the second diaphragm is separately illustrated; Figure 8 is a combined sectional view of a sixth embodiment of the pressure gauge of the present invention; and Figure 9 is the pressure of the present invention A combined cross-sectional view of a seventh embodiment.

Claims (4)

A pressure gauge for allowing a fluid to enter and measuring a pressure value of the fluid, comprising: a cylinder block having a first cylinder block, and a second cylinder block, the first cylinder block and the second cylinder block Cooperating to define a cylinder chamber; a detecting unit mounted on the cylinder block and having a first diaphragm, a second diaphragm spaced from the first diaphragm, and a linkage position on the first diaphragm And a connecting rod between the second diaphragm, the cylinder chamber having a first space between the first diaphragm and the first cylinder for fluid to enter, and a first diaphragm And a second space between the second diaphragm and a third space between the second diaphragm and the second cylinder, the connecting rod is located in the second space; and a display unit is mounted In the second cylinder and the third space, and connected to the second diaphragm; the detecting unit further has a gap between the first diaphragm and the second diaphragm for the connecting rod to pass through Separator and a leakproof ring mounted between the separator and the connecting rod The second space has a pressure difference region between the first diaphragm and the partition, and the first cylinder has a first passage communicating with the first space, the partition having a a second passage that communicates with the differential pressure zone. The pressure gauge of claim 1, wherein the first cylinder has a first wall, a first base wall spaced from the first wall, and a first wall and the first wall a first surrounding wall between the base walls, the first passage being disposed on one of the first base wall and the first surrounding wall. The pressure gauge of claim 1, wherein the second diaphragm has a second lip wall held by the cylinder block, and a second main film for separating the second space and the third space The wall, the second main membrane wall is wavy. The pressure gauge of claim 1, wherein the shape of the second diaphragm is selected from the group consisting of: a cross, a strip, and a Y shape.