TWI808578B - Pressure gauge - Google Patents

Abstract

A pressure gauge is provided, including a case, a base, a housing member, a, pressure sensing unit, a movement unit and a push rod. The case defines a radial and an axial. The case has an inside space, an opening and a through hole. The base is disposed in the inside space. The base has a first passage and a second passage. The first passage extends along the axial. The second passage extends along the radial. The housing member is disposed on the base. The housing member and the base form a room. The pressure sensing unit has a diaphragm and a connected base. The connected base is positioned on the diaphragm. The diaphragm is disposed in the room. The movement unit is connected with the pressure sensing unit. The push rod is movably disposed in the first passage.

Description

pressure gauge

The present invention is related to pressure gauges.

A pressure gauge is a device installed on storage equipment such as pipelines, valve bodies, and tanks to display internal pressure. According to different use requirements and measurement targets, it can be roughly divided into Bourdon tube pressure gauges, diaphragm pressure gauges, explosion-proof pressure gauges, explosion-proof electric contact pressure gauges, vacuum pressure gauges, etc. Among them, the diaphragm pressure gauge is suitable for measuring acid-base, high-viscosity, and easy-to-solidify media. It can be used in a wide range, so it is more common in daily life and processing plants. For example, the pressure gauge disclosed in Taiwan Patent No. M482064 belongs to this category.

However, the overall thickness of the pressure gauge disclosed in Patent No. M482064 is relatively thick, which requires more assembly space for assembly and use. Although the combination of the case and the base is supplemented by screws, it will still cause assembly gaps or structural deformations between the case and the base when a collision occurs, resulting in inaccurate doubts during measurement and use.

Therefore, it is necessary to provide a novel and progressive pressure gauge to solve the above problems.

The main purpose of the present invention is to provide a pressure gauge, which can effectively reduce the thickness of the entire gauge body, making the overall structure lighter and thinner.

To achieve the above object, the present invention provides a pressure gauge, which includes: a housing, a base, a bow, a pressure sensing unit, a core unit and a push rod. The casing defines an axial direction and a radial direction, and includes an inner space, an opening and a through hole, the opening communicates with the inner space along the axial direction, and the through hole communicates with the inner space along the radial direction; the base is accommodated in the inner space, and the base includes a first passage and a second passage, the first passage extends along the axial direction and faces the opening, the second passage extends along the radial direction and faces the through hole, the second passage laterally communicates with the first passage, and the second passage is connected to a connecting pipe passing through the through hole; The base is covered to define a chamber together; the pressure sensing unit includes a diaphragm and a connecting seat, the connecting seat is positioned on the diaphragm, the diaphragm is accommodated in the chamber and is sandwiched between the bow frame and the base; the watch movement unit includes a rotating shaft, a torsion spring, a screw seat, a pointer and a dial, the dial is arranged on the side of the bow frame facing away from the base, one end of the rotating shaft is plugged into the connecting seat, and the other end of the rotating shaft passes through the dial. The pointer is set on the other end of the rotating shaft in the same rotation relationship, the torsion spring is sleeved on the rotating shaft, the screw seat is positioned at the connecting seat and abuts against the torsion spring; the push rod is movably accommodated in the first channel, and the push rod is driven by the fluid from the set of connecting pipes to push against the pressure sensing unit; wherein, the pressure sensing unit also includes a force equalizing plate, which is interposed between the diaphragm and the push rod, and when the push rod approaches the pressure sensing unit, the push rod drives the equal force plate When the diaphragm is pushed to deform, the equalizer is concavely provided with a cavity facing the side of the diaphragm. When the equalizer pushes the diaphragm, the connection seat is inserted into the hole.

1: Shell

11: Axial

12: Radial

13: Internal space

14: opening

15: Through hole

2: Base

21: The first channel

22:Second channel

3: bow frame

4: Containment room

5: Pressure sensing unit

51: Diaphragm

52: Connecting seat

53: Equilibrium

531: Hole

6: Movement unit

61: Shaft

62: torsion spring

63: Spiral seat

64: Pointer

65: Dial

71: putter

72,72A: oil seal

73,73A:Back ring

74,74A: sealing ring

75,75A: plug seat

76: Assembly space

77: group connection hole

8: Group Takeover

Fig. 1 is a perspective view of the first embodiment of an embodiment of the present invention.

Fig. 2 is an exploded view of Fig. 1 .

FIG. 3 is a cross-sectional view of FIG. 1 .

FIG. 4 and FIG. 5 are schematic diagrams of partial zoom-in operations of the first embodiment of the present invention.

Fig. 6 is an exploded view of the second embodiment of the present invention.

Fig. 7 is a sectional view of the second embodiment of the present invention.

The following examples illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention. The "one" or "at least one" before the nouns mentioned in the text does not limit the number, and it can also be "plural" according to requirements. The change in this number is also within the scope of protection, which is described first.

Please refer to Fig. 1 to Fig. 5, which shows an embodiment of the present invention, the pressure gauge of the present invention comprises: a housing 1, a base 2, a bow 3, a pressure sensing unit 5, a movement unit 6 and a push rod 71.

The casing 1 defines an axial direction 11 and a radial direction 12, and includes an inner space 13, an opening 14 and a through hole 15, the opening 14 communicates with the inner space 13 along the axial direction 11, and the through hole 15 communicates with the inner space 13 along the radial direction 12. The base 2 is accommodated in the inner space 13 and does not protrude from the housing 1 . The housing 1 can effectively block the interference of external objects and provide a stable environment for the base 2 without any direct collision.

Specifically, the base 2 includes a first passage 21 and a second passage 22. The first passage 21 extends along the axial direction 11 and faces the opening 14. The second passage 22 extends along the radial direction 12 and faces the through hole 15. The second passage 22 communicates laterally with the first passage 21. The second passage 22 is connected to a set of connecting pipes 8 passing through the through hole 15. The internal fluid (medium) of the object to be measured can flow into the second through the connecting pipe 8. Channel 22; wherein, the base 2 is made of metal material, which has the advantages of better structural strength, less deformation, easier processing, acid and alkali resistance, etc.

More specifically, the bow frame 3 covers the base 2 along the axial direction 11, thereby jointly defining a chamber 4. The pressure sensing unit 5 includes a diaphragm 51 and a connection seat 52. The connection seat 52 is positioned on the diaphragm 51. In the first embodiment, the diaphragm 51 is wave-shaped. In order to avoid the measurement medium from causing damage to the movement unit 6 .

The watch core unit 6 includes a rotating shaft 61, a torsion spring 62, a screw base 63, a pointer 64 and a dial 65. The dial 65 is arranged on the side of the bow frame 3 facing away from the base 2. One end of the rotating shaft 61 is plugged into the connecting seat 52. The other end of the rotating shaft 61 passes through the dial 65. The pointer 64 is arranged on the other end of the rotating shaft 61 in the same rotational relationship. The torsion spring 62 is sleeved on the rotating shaft 61. The screw seat 63 is positioned on the connecting seat 52 and abuts against the torsion spring 62 .

The push rod 71 is movably accommodated in the first channel 21. The push rod 71 is driven by the fluid from the set of connecting pipes 8 to push against the pressure-sensitive unit 5. If the push rod 71 pushes against the diaphragm 51 to deform upward, and then the connecting seat 52 pushes the screw seat 63, the screw seat 63 tends to drive the torsion spring 62 to drive the rotating shaft 61 and the pointer 64 to rotate correspondingly. Through the pointer 64 and the dial 65, the user can easily know by visual means pressure value. It is worth mentioning that the pushing rod 71 pushes against the diaphragm 51 through the medium can effectively control the position where the push rod 71 pushes against the diaphragm 51 , and can avoid direct pressure of the medium pressure on the diaphragm 51 .

Preferably, the pressure gauge further includes an oil seal 72, a backing ring 73, a sealing ring 74 and a plug seat 75, the plug seat 75 is screwed to the first channel 21, the plug seat 75 and the inner wall of the first channel 21 jointly define an assembly space 76, the seal ring 74 is located in the assembly space 76 and sandwiched between the plug seat 75 and the first channel 21 Between the inner walls of a channel 21 , the backing ring 73 and the oil seal 72 are located in the assembly space 76 and abut against each other in the axial direction 11 , and the push rod 71 is movably passed through the backing ring 73 , the oil seal 72 , the sealing ring 74 and the plug seat 75 .

In the first embodiment, the sealing ring 74 abuts against the end surface of the plug seat 75 facing away from the diaphragm 51. In the axial direction 11, the sealing ring 74 stops and limits the backing ring 73 and the oil seal 72. The components are stacked and abutted against each other in sequence along the axial direction 11. This structural configuration is quite convenient for assembly.

Of course, it is not limited to the above, please further refer to the second embodiment shown in Figure 6 and Figure 7, the sealing ring 74A is sleeved on the plug seat 75A, the backing ring 73A and the oil seal 72A are accommodated in the plug seat 75A, this structural configuration can assemble the sealing ring 74A, the backing ring 73A, the oil seal 72A and the plug seat 75A into a component and then plug it into the package. .

Please further refer to the first embodiment of FIGS. 1 to 5 , the end of the first channel 21 away from the diaphragm 51 does not pass through the base 2 and is tapered, so it can be used to support the push rod 71 when not in use, and can also allow fluid to flow back to push the push rod 71 when in use.

Preferably, one side of the plug seat 75 facing the diaphragm 51 is concavely provided with at least one set of connecting holes 77 , and the at least one set of connecting holes 77 is inserted into the plug seat 75 to drive the plug seat 75 to rotate.

Another preference is that the plug seat 75 is embedded in the first channel 21 and does not protrude from the base 2, so as to reduce the occupied volume and avoid unnecessary interference.

It is worth mentioning that the pressure sensing unit 5 further includes an equalizer 53, the equalizer 53 is interposed between the diaphragm 51 and the push rod 71, and when the push rod 71 approaches the pressure sensing unit 5, the push rod 71 drives the equalizer 53 to push the diaphragm 51 to deform. In the first embodiment, the equalizer 53, the push rod 71, the connecting seat 52 and the rotating shaft 61 are arranged coaxially, so as to control the position and design related structural configurations; and Moreover, the radial dimension 12 of the equalizing plate 53 is larger than the radial dimension 12 of the plug seat 75, so as to have more contact area with the diaphragm 51, and can also cover the at least one set of connecting holes 77 to prevent unintended objects from falling into it; in addition, the equalizing plate 53 is made of metal material, such as copper.

In more detail, the equalizer 53 is concavely provided with a cavity 531 on the side facing the diaphragm 51. When the equalizer 53 pushes the diaphragm 51, the connection seat 52 extends into the cavity 531 to shorten the operating length, thereby effectively shortening the thickness of the pressure gauge; wherein, the connection seat 52 does not abut the equalizer 53 in the axial direction 11. In more detail, when the push rod 71 is not pushed against the equalizer 53, at least part of the equalizer 53 is accommodated in the first passage 21. In addition to further reducing the thickness of the pressure gauge, the first passage 21 can also stop the equalizer 53 in the radial direction 12, so that it is firmly positioned.

1: shell 13: Internal space 14: opening 15: Through hole 2: base 21: The first channel 22:Second channel 3: bow frame 5: Pressure sensing unit 51: Diaphragm 52: Connecting seat 53: Equilibrium 64: Pointer 71: putter 72: oil seal 73: back support ring 74: sealing ring 75: plug seat 77: group connection hole 8: Group Takeover

Claims (8)

A pressure gauge, comprising: a shell defining an axial direction and a radial direction, including an internal space, an opening and a through hole, the opening communicates with the internal space along the axial direction, and the through hole communicates with the internal space along the radial direction; a base, accommodated in the internal space, includes a first channel and a second channel, the first channel extends along the axial direction and faces the opening, the second channel extends along the radial direction and faces the through hole, the second channel laterally communicates with the first channel, and the second channel is connected to a group of connecting pipes passing through the through hole; A bow-shaped frame covers the base along the axial direction, and then jointly defines a chamber; a pressure-sensitive unit includes a diaphragm and a connecting seat, the connecting seat is positioned on the diaphragm, the diaphragm is accommodated in the chamber and is clamped between the bow-shaped frame and the base; The other end passes through the dial, the pointer is set at the other end of the rotating shaft to be in the same rotation relationship, the torsion spring is sleeved on the rotating shaft, the screw seat is positioned at the connecting seat and abuts against the torsion spring; and a push rod is movably accommodated in the first channel for being driven by the fluid from the set of connecting pipes to push against the pressure sensing unit; wherein, the pressure sensing unit further includes a force equalizing plate, which is interposed between the diaphragm and the push rod, when the push rod approaches the pressure sensing unit, The push rod drives the equalizer to push the diaphragm to deform, and the equalizer is concavely provided with a cavity facing the diaphragm, and when the equalizer pushes the diaphragm, the connecting seat is extended into the cavity. The pressure gauge as described in claim 1, further comprising an oil seal, a backing ring, a sealing ring and a plug seat, the plug seat is screwed to the first channel, and the plug seat is jointly defined by the inner wall of the first channel An assembly space is formed, the sealing ring is located in the assembly space and sandwiched between the plug seat and the inner wall of the first channel, the backing ring and the oil seal are located in the assembly space and abut against each other in the axial direction, and the push rod is movably passed through the backing ring, the oil seal, the sealing ring and the plug seat. The pressure gauge according to claim 2, wherein the sealing ring is against the end surface of the plug seat facing away from the diaphragm, and the sealing ring stops and limits the back ring and the oil seal in the axial direction. The pressure gauge according to claim 2, wherein the sealing ring is sleeved on the plug seat, and the backing ring and the oil seal are accommodated on the plug seat. The pressure gauge as claimed in claim 2, wherein the plug seat is embedded in the first channel and does not protrude from the base. The pressure gauge according to claim 2, wherein the plug seat is concavely provided with at least one set of connecting holes facing one side of the diaphragm, and the at least one set of connecting holes is inserted by a tool to drive the plug seat to rotate. The pressure gauge according to claim 1, wherein when the push rod is not pushed against the equalizer, at least part of the equalizer is accommodated in the first channel. The pressure gauge as described in claim 4, wherein the plug seat is buried in the first channel and does not protrude from the base; the plug seat is provided with at least one set of connection holes facing one side of the diaphragm, and the at least one set of connection holes is inserted by a tool to drive the plug seat to rotate; when the push rod is not pushed against the equal force plate, at least part of the equal force plate is accommodated in the first channel; the equal force plate, the push rod, the connecting seat and the rotating shaft are arranged coaxially; Force plate; the diaphragm is wavy; the end of the first channel away from the diaphragm does not pass through the base and is tapered; the radial dimension of the equalizer is larger than the radial dimension of the plug seat; the base is made of metal; the equalizer is made of metal.

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