CN108305814B - Pressure signal device capable of bearing ultrahigh overload for long time - Google Patents
Pressure signal device capable of bearing ultrahigh overload for long time Download PDFInfo
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- CN108305814B CN108305814B CN201810162247.1A CN201810162247A CN108305814B CN 108305814 B CN108305814 B CN 108305814B CN 201810162247 A CN201810162247 A CN 201810162247A CN 108305814 B CN108305814 B CN 108305814B
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- diaphragm
- movable contact
- pressure signal
- top plate
- pressure
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- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 claims description 5
- 230000007774 longterm Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 description 24
- 230000008859 change Effects 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a novel pressure signal device capable of bearing ultrahigh overload for a long time, which comprises a shell, wherein a diaphragm, a movable contact point assembly connected with the diaphragm and a stationary contact point assembly matched with the movable contact point assembly are arranged in the shell, an alarm loop connected with an external alarm device is arranged on the movable contact point assembly, a top plate opposite to the diaphragm is arranged in the shell, and a matched full-ripple structure is processed on the top plate and the diaphragm. Since the pressure value of the pressure signal device during normal operation is far higher than the rated pressure value set by the pressure signal device. In order to ensure the normal operation of the pressure signal device, a limit top plate in the pressure signal device, which is contacted with the diaphragm, is designed to be full-corrugated, and when the displacement of the diaphragm of the product reaches a specified value, the diaphragm is contacted with the top plate, so that the limit protection effect on the diaphragm is realized. The problem that the accuracy of a novel pressure signal device which bears ultra-high overload for a long time is reduced or even the novel pressure signal device cannot be used after being used for a long time is solved.
Description
Technical Field
The invention relates to a pressure signal device, in particular to a novel pressure signal device capable of bearing ultrahigh overload for a long time.
Background
The pressure annunciators are mainly two types, mechanical type and electronic type.
Mechanical pressure annunciator working principle: when the system pressure increases or decreases, the displacement of the elastic element changes correspondingly according to the change of the pressure value. When the pressure in the system is higher than or lower than the rated safety pressure, the deformation of the elastic element pushes the switch joint to be connected or disconnected through the guide rod, when the pressure in the system is reduced or increased to the rated recovery value, the elastic element is reset instantaneously, and the switch is reset automatically, or simply, when the measured pressure exceeds the rated value, the free end of the elastic element generates displacement, and the switch element is pushed directly or after comparison, so that the on-off state of the switch element is changed, and the purpose of controlling the measured pressure is achieved.
The pressure annunciator is simple in structure and high in accuracy, but weak in high overload resistance, the switching element is connected and disconnected with a stroke difference, when overload pressure is more than 15 times of a rated pressure value, the elastic element is easy to plastically deform, a rated product alarm signal drifts, and the operating requirement under the condition of long-term high overload pressure cannot be met.
Electronic pressure annunciator working principle: the pressure signal device is internally provided with a pressure chip, when the pressure value changes, the resistance value or the capacitance value of the pressure chip changes, the pressure signal is amplified by a high-precision instrument amplifier, and after data is acquired and processed by a high-speed MCU, the signal output or disconnection of the relay is controlled.
The upper limit control point and the lower limit control point of the pressure annunciator can be freely set, and the pressure annunciator has small hysteresis, quick response and high precision, but has relatively high price, needs power supply and has weak high overload resistance. When the overload pressure is more than 20 times of the rated pressure value, the pressure chip is easy to generate plastic deformation, and the rated alarm signal of the product drifts, so that the use requirement under the condition of long-term high overload pressure can not be met.
In recent years, with the high-speed development of the aviation industry and the gas turbine, the pressure signal device for monitoring the pressure change condition of the lubricating oil, the fuel oil and the air power system and bearing the overload pressure by more than 20 times for a long time is more and more strongly demanded, so that the novel pressure signal device which has the advantages of simple structure, reliable performance and low price and can bear the ultrahigh overload for a long time can be developed to meet the high-speed development requirement of the aviation industry and the gas turbine.
Disclosure of Invention
The invention aims to solve the technical problem that the accuracy of a novel pressure signal device which bears ultra-high overload for a long time is reduced or even the novel pressure signal device cannot be used after the novel pressure signal device is used for a long time, and aims to provide the novel pressure signal device which bears ultra-high overload for a long time and solve the problem of the novel pressure signal device which bears ultra-high overload for a long time.
The invention is realized by the following technical scheme:
the utility model provides a novel pressure signal ware with bear super high overload for a long time, includes casing and the sensing component of setting in the casing, its characterized in that be provided with the diaphragm of being connected with the pressure chamber in the casing still include be provided with in the casing with the annular roof that the diaphragm is just right, the roof sets up in the direction that the diaphragm moved when being pressed, the center of roof coincides with the geometric center of diaphragm, handles assorted full ripple structure on roof and the diaphragm. Since the pressure value of the pressure signal device during normal operation is far higher than the rated pressure value set by the pressure signal device. In order to ensure the normal operation of the pressure signal device, a limit top plate in the pressure signal device, which is contacted with the diaphragm, is designed to be full-corrugated, and when the displacement of the diaphragm of the product reaches a specified value, the diaphragm is contacted with the top plate, so that the limit protection effect on the diaphragm is realized.
The sensing assembly comprises a movable contact assembly connected with the diaphragm and a static contact assembly matched with the movable contact assembly, and the connecting line of the movable contact assembly and the static contact of the static contact assembly is parallel to the moving direction of the diaphragm when the diaphragm is pressed. The movable contact of the movable contact assembly is connected with one end of a straight part of a U-shaped ejector rod, the other end of the straight part of the U-shaped ejector rod is in spot welding connection with the geometric center of the diaphragm, and the U-shaped ejector rod is also provided with a wiring disc connected with the movable contact. The stationary contact assembly comprises a stationary contact seat plate and a stationary contact connected to the stationary contact seat plate through a spring piece. The pressure signal device adopts a static contact assembly structure, and the static contact assembly mainly comprises parts such as a static contact, a spring piece, a static contact seat plate and the like. Wherein the spring piece is made of high-elasticity alloy, good elastic performance and difficult occurrence of plastic deformation. When the rated pressure value is reached, the fixed contact and the movable contact are contacted to output an alarm signal, and meanwhile, the spring piece is elastically deformed. When the pressure is reduced, the spring piece resumes deformation, thereby effectively ensuring the stability of the product.
The pressure signal device movable contact point component mainly comprises a wiring lug, a U-shaped ejector rod, a movable contact point and other parts. The movable contact point assembly of the pressure signal device is in spot welding connection with the diaphragm to form a whole, when the pressure value sensed by the diaphragm is increased, the axial displacement of the center of the diaphragm is increased, the movable contact point assembly also responds to the displacement of the diaphragm at all times, when the displacement reaches a specified value, a movable contact point in the movable contact point assembly is in contact with a fixed contact point in the fixed contact point assembly, a loop is conducted, and an alarm signal is output; when the pressure sensed by the diaphragm is reduced, the axial displacement of the center of the diaphragm is reduced, the movable contact in the movable contact assembly is immediately separated from the fixed contact in the fixed contact assembly, and the alarm signal is released.
The top plate is connected to the shell through the matching of the screw and the insulating bush. And a pressing gasket and an insulating gasket are further arranged between the screw and the insulating bush. By adopting the structure, the distance between the top plate and the diaphragm can be adjusted through the adjusting screw so as to adapt to different working environments.
And the contacts of the movable contact assembly and the static contact assembly are made of silver-copper alloy. As the movable contact and the static contact are both made of silver-copper alloy, the stability of an electric output signal is ensured, and false alarm is avoided.
The distance between the top plate and the membrane is not more than 0.4mm. In order to ensure that the pressure signal device bears high overload capacity for a long time, the protective diaphragm moves in an elastic range, so that the diaphragm is prevented from being damaged due to large movement displacement, and the displacement of the diaphragm is required to be accurately controlled. When the displacement of the diaphragm is less than or equal to 0.4mm, the diaphragm is contacted with the corrugated top plate, so that the diaphragm can be effectively protected and can be prevented from plastic deformation.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the novel pressure signal device with the function of bearing the ultrahigh overload for a long time controls the displacement of the diaphragm, adopts the full-ripple structure by adopting the contact of the top plate and the diaphragm, ensures that the pressure signal device normally works under the condition of the ultrahigh overload pressure for a long time, avoids the plastic deformation of the diaphragm, alarms the pressure value drift, and improves the safety and the reliability of the pressure signal device;
2. the invention relates to a novel pressure signal device capable of bearing ultrahigh overload for a long time, which adopts a static contact assembly structure, when the pressure reaches a rated pressure value, a static contact and a movable contact are contacted to output an alarm signal, and a spring piece is elastically deformed. When the pressure is reduced, the spring piece recovers deformation, so that the stability of the product is effectively ensured;
3. the novel pressure annunciator with the function of bearing ultrahigh overload for a long time adopts a movable contact point assembly structure, when a movable contact point in the movable contact point assembly is contacted with a static contact point in the static contact point assembly, a loop is conducted, an alarm signal is output, and when the movable contact point in the movable contact point assembly is immediately separated from the static contact point in the static contact point assembly, the alarm signal is released, the electric output stability is ensured, and false alarm can be effectively avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of the pressure annunciator of the present invention;
FIG. 2 is a schematic diagram of a diaphragm and a fully corrugated top plate.
In the drawings, the reference numerals and corresponding part names:
1-socket, 2-cover plate, 3-shell, 4-screw, 5-compression gasket, 6-insulation gasket, 7-insulation bushing, 8-nut, 9-saddle washer, 10-diaphragm, 11-sealing ring, 12-top plate, 13-movable contact assembly, 14-static contact assembly, 15-compression nut.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Example 1
As shown in fig. 1 and 2, the novel pressure annunciator with ultrahigh overload bearing capacity for a long time comprises a shell 3, wherein a diaphragm 10, a movable contact assembly 13 connected with the diaphragm 10 and a fixed contact assembly 14 matched with the movable contact assembly 13 are arranged in the shell 3, the connecting line of the movable contact assembly 13 and the fixed contact of the fixed contact assembly 14 is parallel to the axis of the diaphragm 10, an alarm loop connected with an external alarm device is arranged on the movable contact assembly 13, a top plate 12 opposite to the diaphragm 10 is arranged in the shell, the top plate 12 is arranged in the direction of movement of the diaphragm 10 when the diaphragm 10 is pressed, and a matched full-wave structure is processed on the top plate 12 and the diaphragm 10. Since the pressure value of the pressure signal device during normal operation is far higher than the rated pressure value set by the pressure signal device. In order to ensure the normal operation of the pressure signal device, the limiting top plate 12 contacted with the diaphragm 10 in the pressure signal device is designed to be full corrugated, when the displacement of the diaphragm 10 of the product reaches a specified value, the diaphragm 10 is contacted with the top plate 12, so that the limiting protection effect on the diaphragm 12 is achieved.
The spacing between the top plate 12 and the membrane 10 is 0.35mm. In order to ensure that the pressure annunciator bears high overload capacity for a long time, the protective diaphragm 10 moves in an elastic range, so that the diaphragm 10 is prevented from being damaged due to large movement displacement, and the displacement of the diaphragm 10 needs to be accurately controlled. When the displacement of the diaphragm 10 is less than or equal to 0.4mm, the diaphragm 10 is contacted with the corrugated top plate 12, so that the diaphragm 10 can be effectively protected from plastic deformation.
The stationary contact assembly 14 includes a stationary contact base plate and a stationary contact connected to the stationary contact base plate by a spring plate. The pressure signal device adopts a structure of a static contact assembly 14, and the static contact assembly 14 mainly comprises parts such as a static contact, a spring piece, a static contact seat plate and the like. Wherein the spring piece is made of high-elasticity alloy, has good elastic performance and is not easy to generate plastic deformation. When the rated pressure value is reached, the fixed contact and the movable contact are contacted to output an alarm signal, and meanwhile, the spring piece is elastically deformed. When the pressure is reduced, the spring piece resumes deformation, thereby effectively ensuring the stability of the product.
The movable contact assembly 13 comprises a U-shaped ejector rod, one end of the U-shaped ejector rod is in spot welding connection with the membrane 10, a movable contact is arranged at the other end of the U-shaped ejector rod, and a wiring disc connected with the movable contact is further arranged on the U-shaped ejector rod. The pressure annunciator movable contact point component 13 mainly comprises a wiring lug, a U-shaped ejector rod, a movable contact point and other parts. The pressure annunciator movable contact point component 13 is in spot welding connection with the diaphragm 10 to form a whole, when the diaphragm 10 senses that the pressure value is increased, the central axial displacement of the diaphragm 10 is increased, the movable contact point component 13 also responds to the displacement of the diaphragm 10 constantly, when the displacement reaches a specified value, a movable contact point in the movable contact point component 13 is in contact with a fixed contact point in the fixed contact point component 14, a loop is conducted, and an alarm signal is output; when the pressure sensed by the diaphragm 10 is reduced, the axial displacement of the center of the diaphragm 10 is reduced, and the movable contact in the movable contact assembly 13 is immediately disconnected from the stationary contact in the stationary contact assembly 14, so that an alarm signal is released.
The top plate 12 is connected to the housing 3 by means of a screw 4 and insulating bush 7 fit. A pressing gasket 5 and an insulating gasket 6 are further arranged between the screw 4 and the insulating bush 7. With the adoption of the structure, the distance between the top plate 12 and the diaphragm 10 can be adjusted through the adjusting screw 4 so as to adapt to different working environments.
The contacts of the movable contact assembly 13 and the static contact assembly 14 are made of silver-copper alloy. As the movable contact and the static contact are both made of silver-copper alloy, the stability of an electric output signal is ensured, and false alarm is avoided.
Example 2
In this embodiment, in the working process of the device, the device is connected to a pressure source through a nut 8 and a saddle washer 9, and is connected to an alarm device through a socket 1 and a cover plate 2, the pressure source enters a closed pressure sensing cavity of the pressure annunciator through an oil inlet at the front end of a shell 3 of the pressure annunciator, and a diaphragm 10 generates displacement deformation in the central axial direction of the diaphragm 10 after sensing the change of a pressure value, so that a movable contact assembly 13 is pushed to move. When the pressure value reaches a specified value, the movable contact in the movable contact assembly 13 is contacted with the fixed contact in the fixed contact assembly 14, so that a loop is conducted, an alarm signal is output outwards, when the pressure value continues to rise, the diaphragm 10 is completely contacted with the full corrugated top plate 12 when the central axial displacement of the diaphragm 10 reaches a limit displacement, the pressure is raised again, the diaphragm 10 is protected by the corrugated top plate 12, the plastic deformation of the diaphragm 10 is avoided, and the elastic reed in the fixed contact assembly 14 is elastically deformed; when the pressure value is reduced, the central axial displacement of the diaphragm 10 is reduced, the spring reed in the static contact assembly 14 gradually recovers deformation, and when the pressure is lower than the rated pressure value, the movable contact in the movable contact assembly 13 is immediately separated from the static contact in the static contact assembly 14, so that an alarm signal is relieved.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (4)
1. The pressure annunciator with the function of bearing ultrahigh overload for a long time comprises a shell (3) and a sensing assembly arranged in the shell (3), and is characterized in that a diaphragm (10) connected with a pressure chamber is arranged in the shell (3), an annular top plate (12) opposite to the diaphragm (10) is arranged in the shell, the top plate (12) is arranged in the direction of movement of the diaphragm (10) when being pressed, the center of the top plate (12) coincides with the geometric center of the diaphragm (10), and a matched full-ripple structure is processed on the top plate (12) and the diaphragm (10);
the sensing assembly comprises a movable contact assembly (13) connected with the diaphragm (10) and a fixed contact assembly (14) matched with the movable contact assembly (13), and the connecting line of the movable contact assembly (13) and the fixed contact of the fixed contact assembly (14) is parallel to the moving direction of the diaphragm (10) when being pressed;
one end of a straight part of a U-shaped ejector rod is connected to the movable contact of the movable contact assembly (13), the other end of the straight part of the U-shaped ejector rod is in spot welding connection with the geometric center of the diaphragm (10), and a wiring disc connected with the movable contact is further arranged on the U-shaped ejector rod;
the top plate (12) is connected to the shell (3) through the matching of the screw (4) and the insulating bush (7);
the distance between the top plate (12) and the membrane (10) is not more than 0.4mm.
2. A pressure signal with long term overload, according to claim 1, characterized in that the stationary contact assembly (14) further comprises a stationary contact seat plate connected to the stationary contact by a spring plate.
3. A pressure signal with long term overload bearing according to claim 1, characterized in that the contacts of the moving contact assembly (13) and the stationary contact assembly (14) are both of silver copper alloy.
4. A pressure signal with long-term overload bearing according to claim 1, characterised in that between the screw (4) and the insulating bush (7) there are also provided a compression washer (5) and an insulating washer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162247.1A CN108305814B (en) | 2018-02-27 | 2018-02-27 | Pressure signal device capable of bearing ultrahigh overload for long time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162247.1A CN108305814B (en) | 2018-02-27 | 2018-02-27 | Pressure signal device capable of bearing ultrahigh overload for long time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108305814A CN108305814A (en) | 2018-07-20 |
| CN108305814B true CN108305814B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810162247.1A Active CN108305814B (en) | 2018-02-27 | 2018-02-27 | Pressure signal device capable of bearing ultrahigh overload for long time |
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| Country | Link |
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| CN (1) | CN108305814B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115655558B (en) * | 2022-12-28 | 2023-04-11 | 四川新川航空仪器有限责任公司 | Diaphragm piece for diaphragm type pressure signal device, pressure signal device and diaphragm damage detection method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1518727A (en) * | 1966-01-03 | 1968-03-29 | Texas Instruments Inc | Adjustment device for electric switches |
| EP0517674A1 (en) * | 1991-06-04 | 1992-12-09 | BITRON S.p.A. | A fluid-tight electrical pressure switch for hydraulic or pneumatic circuits |
| JPH0864091A (en) * | 1994-08-18 | 1996-03-08 | Saginomiya Seisakusho Inc | High pressure pressure switch |
| JP2000036235A (en) * | 1998-05-11 | 2000-02-02 | Fuji Koki Corp | Pressure switch |
| JP2002260505A (en) * | 2001-02-27 | 2002-09-13 | Saginomiya Seisakusho Inc | Pressure switch |
| KR20040055949A (en) * | 2002-12-23 | 2004-06-30 | 주식회사 퍼시픽콘트롤즈 | pressure switch |
| CN1755858A (en) * | 2004-09-29 | 2006-04-05 | Trw车辆电气与零件有限两合公司 | Pressure switch with protective membrane not overstretchable |
| JP2017054780A (en) * | 2015-09-11 | 2017-03-16 | 株式会社鷺宮製作所 | pressure switch |
| CN207765371U (en) * | 2018-02-27 | 2018-08-24 | 四川新川航空仪器有限责任公司 | It is a kind of that there is the novel pressure signalling means for bearing superelevation overload for a long time |
-
2018
- 2018-02-27 CN CN201810162247.1A patent/CN108305814B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1518727A (en) * | 1966-01-03 | 1968-03-29 | Texas Instruments Inc | Adjustment device for electric switches |
| EP0517674A1 (en) * | 1991-06-04 | 1992-12-09 | BITRON S.p.A. | A fluid-tight electrical pressure switch for hydraulic or pneumatic circuits |
| JPH0864091A (en) * | 1994-08-18 | 1996-03-08 | Saginomiya Seisakusho Inc | High pressure pressure switch |
| JP2000036235A (en) * | 1998-05-11 | 2000-02-02 | Fuji Koki Corp | Pressure switch |
| JP2002260505A (en) * | 2001-02-27 | 2002-09-13 | Saginomiya Seisakusho Inc | Pressure switch |
| KR20040055949A (en) * | 2002-12-23 | 2004-06-30 | 주식회사 퍼시픽콘트롤즈 | pressure switch |
| CN1755858A (en) * | 2004-09-29 | 2006-04-05 | Trw车辆电气与零件有限两合公司 | Pressure switch with protective membrane not overstretchable |
| JP2017054780A (en) * | 2015-09-11 | 2017-03-16 | 株式会社鷺宮製作所 | pressure switch |
| CN207765371U (en) * | 2018-02-27 | 2018-08-24 | 四川新川航空仪器有限责任公司 | It is a kind of that there is the novel pressure signalling means for bearing superelevation overload for a long time |
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| CN108305814A (en) | 2018-07-20 |
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