CN203348657U - Positive and negative pressure limit pressure protection device for vacuum manometer - Google Patents
Positive and negative pressure limit pressure protection device for vacuum manometer Download PDFInfo
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- CN203348657U CN203348657U CN 201320392633 CN201320392633U CN203348657U CN 203348657 U CN203348657 U CN 203348657U CN 201320392633 CN201320392633 CN 201320392633 CN 201320392633 U CN201320392633 U CN 201320392633U CN 203348657 U CN203348657 U CN 203348657U
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- pressure
- way valve
- positive
- valve port
- upper cover
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Abstract
The utility model discloses a positive and negative pressure limit pressure protection device for a vacuum manometer. The positive and negative pressure limit pressure protection device for the vacuum manometer comprises an outer shell and an upper cover which is arranged on the outer shell, and the side face of the outer shell and the top of the upper cover are provided with a first filler neck and a second filler neck which are used for being connected with the vacuum manometer and a pressure source respectively. An adjusting seat is arranged at one end, far away from the upper cover, inside a shell body, the adjusting seat is connected with an adjusting plate, and the adjusting plate is fixedly connected with a corrugated pipe. The connecting portion of the upper cover and the shell body is provided with a two-way valve port, the periphery of the two-way valve port is in abutting connection with the shell body, the upper side and the lower side of the two-way valve port are provided with an upper valve plate and a lower valve plate respectively, and a valve core shaft is arranged on the center portion of the two-way valve port. The other end of the corrugated pipe is connected with the lower valve plate. The positive and negative pressure limit pressure protection device is an independent protection device, is provided with an independent pressure sensing and executing element, can be in tandem connection into positive or negative pressure measuring pipelines of any modes, and is used for protecting an instrument from being damaged by overpressure. The positive and negative pressure limit pressure protection device for the vacuum manometer can be used for positive pressure overload protection, and meanwhile can be used for negative pressure overload protection.
Description
Technical field
The utility model relates to a kind of instrument protective arrangement for limiting output voltage, specifically a kind of protective arrangement for limiting output voltage of the positive/negative-pressure for pressure vacuum gauge.
Background technique
Pressure vacuum gauge is that a kind of malleation of can measuring can be measured the pressure instrument of negative pressure again, it measures sensing element is generally bellows or bourdon tube, in actual use, when institute's measuring pressure surpasses certain limit, sensing element can damage because of overload, particularly, in the situation that instrument range is less, more easily this thing happens.
In the bellows table of measuring malleation, a kind of protective gear is arranged at present, can when pressure surpasses certain limit, utilize the displacement of sensing element itself to close the gas circuit of leading to sensing element, thereby avoid overload to destroy.But, aspect pressure vacuum gauge, due to the restriction that is subject to configuration aspects, also there is no to limit the device of positive/negative-pressure overload simultaneously.
The model utility content
The purpose of this utility model is to provide a kind of protective arrangement for limiting output voltage, can experience malleation and negative pressure, and turn-offs and lead to the gas circuit of measuring sensing element when malleation or negative pressure pressure reach certain limit, makes measuring cell avoid overload destruction; When malleation or negative pressure pressure are got back to normal range (NR), can automatically open the measurement gas circuit again, thereby realize the automatic protection to the vacuum pressure instrument.
The technological scheme that the utility model provides is: a kind of protective arrangement for limiting output voltage of the positive/negative-pressure for pressure vacuum gauge, it is characterized in that: comprise shell and be arranged on the upper cover on described shell, the shell side is respectively equipped with connecting-tube nozzle one and the connecting-tube nozzle two for being connected pressure vacuum gauge and pressure source with upper tops; Enclosure interior is provided with adjustment seat away from an end of upper cover, is connected with regulator plate on adjustment seat, is fixedly connected with bellows on regulator plate; Upper cover and housing joint are provided with two-way valve port, surrounding and the housing of two-way valve port connect, the both sides up and down of two-way valve port arrange respectively valve plate and lower valve, and center is provided with poppet shaft, and two-way valve port, upper valve plate, lower valve and poppet shaft form the length that can two-wayly close and open valve; The other end of bellows is connected with lower valve.
In the utility model, the bellows outside, housing inboard and two-way valve port downside form an atmospheric pressure cavity, measure pipeline with pressure vacuum gauge and communicate, for experiencing the pressure of measurement; Inboard another atmospheric pressure cavity that forms of two-way valve port upside and upper cover, communicate with tested pressure source pipeline; The inside of bellows communicates with ambient atmosphere, forms reference pressure.
In the utility model, between adjustment seat and housing, adjustment seat and regulator plate, two-way valve port and housing, two-way valve port and upper valve plate and two-way valve port and poppet shaft, all adopt the O RunddichtringO to be sealed.
Above-mentioned O RunddichtringO selection standard part, can be the materials such as nitrile butadiene rubber, silicone rubber or fluorine rubber.
Further, the sealing surface of upper valve plate and lower valve in the utility model, its surface roughness should be not more than Ra1.6.
While using the utility model to measure negative pressure, bellows is subject to the effect of inside and outside differential pressure, produces the action of elongation; And, when measuring malleation, bellows is subject to the effect of inside and outside differential pressure, produce the action of shortening.In addition, in the utility model, inboard another atmospheric pressure cavity that forms of two-way valve port upside and upper cover, with tested pressure source pipeline, communicate, and an end of bellows is connected with lower valve; When certain elongation displacement occurs or shortens displacement in bellows, can make valve plate or lower valve compress two-way valve port, thereby turn-off the gas circuit of measuring, the overload of sensing element is measured in restriction, thereby realizes the function of overload protection.Simultaneously, by adjusting the gap of two-way valve port both sides and upper valve plate and lower valve, just can set the pressure range of overload protection.
In prior art; the protective gear of bellows table is to utilize the displacement of measuring bellows itself to turn-off gas circuit; can only limit the overload of malleation; and protective gear of the present utility model be utilize one independently bellows as being felt and control unit; and be connected on the measurement pipeline; not only can limit the overload of malleation, also can limit the overload of negative pressure.
Different from the bellows table with overvoltage protection in prior art, with the bellows table of overvoltage protection, utilize the displacement of bellows itself to turn-off gas circuit, i.e. the measuring cell of utilization itself produces the action of protecting, can only be for the overpressure protection of malleation; And the utility model is an independently protective gear; it has the independently pressure-sensitive executive component of holding concurrently; measurement sensing element in its protection process and instrument is irrelevant, and malleation or the positive/negative-pressure that can be serially connected in arbitrary form are measured in pipeline, avoid superpressure for the protection of instrument and destroy.The utility model not only can be for the overload protection of malleation, and the while also can be for the overload protection of negative pressure.Such as at range being ± and the minute-pressure pressure vacuum gauge of 1KPa measures in pipeline, the positive/negative-pressure protective arrangement for limiting output voltage of can seal in ± 1.25KPa, and the overload in the time of can avoiding measuring is destroyed.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Connection diagram when Fig. 2 is the utility model use.
In figure: 1, connecting-tube nozzle two, 2, upper cover, 3, upper valve plate, 4, poppet shaft, 5, two-way valve port, 6, lower valve, 7, bellows, 8, shell, 9, connecting-tube nozzle one, 10, regulator plate, 11, adjustment seat, 12, the O RunddichtringO.
Embodiment
Below in conjunction with accompanying drawing, with concrete enforcement, the utility model is described in further detail, and the utility model not only is confined to this.
As shown in Figure 1, the utility model comprises shell 8 and is arranged on the upper cover 2 on described shell, and the shell side is respectively equipped with connecting-tube nozzle 1 and the connecting-tube nozzle 21 for being connected pressure vacuum gauge and pressure source with upper tops; Enclosure interior is provided with adjustment seat 11 away from an end of upper cover, is connected with regulator plate 10 on adjustment seat, is fixedly connected with bellows 7 on regulator plate; Upper cover and housing joint are provided with two-way valve port 5, and surrounding and the housing of two-way valve port connect, and the both sides up and down of two-way valve port arrange respectively valve plate 3 and lower valve 6, the sealing surface of valve plate and lower valve on this, and its surface roughness should be not more than Ra1.6; Center is provided with poppet shaft 4, and two-way valve port, upper valve plate, lower valve and poppet shaft form the length that can two-wayly close and open valve; The other end of bellows is connected with lower valve.
Wherein, the bellows outside, housing inboard and two-way valve port downside form an atmospheric pressure cavity, measure pipeline with pressure vacuum gauge and communicate; Inboard another atmospheric pressure cavity that forms of two-way valve port upside and upper cover, communicate with tested pressure source pipeline; The inside of bellows communicates with ambient atmosphere, forms reference pressure.
Between adjustment seat and housing, adjustment seat and regulator plate, two-way valve port and housing, two-way valve port and upper valve plate and two-way valve port and poppet shaft, all adopt O RunddichtringO 12 to be sealed, this O RunddichtringO selection standard part, can be the materials such as nitrile butadiene rubber, silicone rubber or fluorine rubber.
Constitutional detail of the present utility model can be made with metallic material, and as Cuprum alloy, aluminum alloy, structural steel, stainless steel etc., if adopt Cuprum alloy or structural steel, electroplating processes should be made in its surface; Between bellows and lower valve and regulator plate, available cementing or mode welding is connected; Between connecting-tube nozzle two and upper cover, shell and connecting-tube nozzle one, available screw thread adds sealing material and is connected; O RunddichtringO between two-way valve port and poppet shaft is bonded in the both sides of two-way valve port, guarantees with one heart; Use screw-thread fit between upper valve plate and two-way valve port, regulator plate and adjustment seat, the O RunddichtringO is sealed.
As shown in Figure 2, the utility model connects pressure vacuum gauge and sourceof negative pressure, turn regulator plate by diagram, regulate the gap of lower valve and two-way valve port, protective gear is ended on predetermined negative pressure value, at this moment continue to increase the value of negative pressure, the indication numerical value of pressure vacuum gauge remains unchanged; Then change pressure source into malleation, valve plate in turn, the distance of valve plate and two-way valve port in adjusting is ended protective gear on the malleation value of setting, and at this moment pressure continues to increase, and the indication numerical value of pressure vacuum gauge is constant.After protection pressure is adjusted, outer casing end is closed up fixing, pressure limiting device has assembled.
The utility model can be for the protection of the various pressure vacuum gauges of relative pressure-0.1MPa ~ 1.6MPa; also can be in order to vacuum gauge or the pressure gauge of protecting corresponding range; by changing bellows namely net sectional area and the elasticity coefficient of bellows, can change the protection pressure range of protective gear.During actual the use, pressure source or sourceof negative pressure are connected with connecting-tube nozzle two, and pressure vacuum gauge is connected with connecting-tube nozzle one, so not only can protect pressure vacuum gauge or pressure gauge to avoid destroying, and also can prevent that the overload of bellows in protective gear from destroying.
The foregoing is only preferred embodiment of the present utility model, not protection domain of the present utility model is limited.All any modifications of making, be equal to replacement, improvement etc. in spirit of the present utility model and principle, all should be included in protection domain of the present utility model.
Claims (1)
1. the protective arrangement for limiting output voltage of the positive/negative-pressure for pressure vacuum gauge, it is characterized in that: comprise shell and be arranged on the upper cover on described shell, the shell side is respectively equipped with connecting-tube nozzle one and the connecting-tube nozzle two for being connected pressure vacuum gauge and pressure source with upper tops; Enclosure interior is provided with adjustment seat away from an end of upper cover, is connected with regulator plate on adjustment seat, is fixedly connected with bellows on regulator plate; Upper cover and housing joint are provided with two-way valve port, surrounding and the housing of two-way valve port connect, the both sides up and down of two-way valve port arrange respectively valve plate and lower valve, and center is provided with poppet shaft, and two-way valve port, upper valve plate, lower valve and poppet shaft form the length that can two-wayly close and open valve; The other end of bellows is connected with lower valve.
2. a kind of protective arrangement for limiting output voltage of the positive/negative-pressure for pressure vacuum gauge according to claim 1 is characterized in that: the described bellows outside, housing is inboard and two-way valve port downside forms an atmospheric pressure cavity, measures pipeline with pressure vacuum gauge and communicates; Inboard another atmospheric pressure cavity that forms of two-way valve port upside and upper cover, communicate with tested pressure source pipeline; The inside of bellows communicates with ambient atmosphere, forms reference pressure.
3. a kind of protective arrangement for limiting output voltage of the positive/negative-pressure for pressure vacuum gauge according to claim 1, is characterized in that: between described adjustment seat and housing, adjustment seat and regulator plate, two-way valve port and housing, two-way valve port and upper valve plate and two-way valve port and poppet shaft, all adopt the O RunddichtringO to be sealed.
4. a kind of protective arrangement for limiting output voltage of the positive/negative-pressure for pressure vacuum gauge according to claim 3, it is characterized in that: described O RunddichtringO selection standard part can be nitrile butadiene rubber, silicone rubber or fluorine rubber material.
5. a kind of protective arrangement for limiting output voltage of the positive/negative-pressure for pressure vacuum gauge according to claim 1, it is characterized in that: the sealing surface of described upper valve plate and lower valve, its surface roughness should be not more than Ra1.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320392633 CN203348657U (en) | 2013-07-03 | 2013-07-03 | Positive and negative pressure limit pressure protection device for vacuum manometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320392633 CN203348657U (en) | 2013-07-03 | 2013-07-03 | Positive and negative pressure limit pressure protection device for vacuum manometer |
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| CN203348657U true CN203348657U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320392633 Expired - Fee Related CN203348657U (en) | 2013-07-03 | 2013-07-03 | Positive and negative pressure limit pressure protection device for vacuum manometer |
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| CN (1) | CN203348657U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD4338C1 (en) * | 2013-05-21 | 2015-10-31 | Юрий ЩИГОРЕВ | Screw electric pump with autonomous cooling |
| CN112595476A (en) * | 2020-11-27 | 2021-04-02 | 中国航发四川燃气涡轮研究院 | Method and device for measuring rigidity of vacuum diaphragm capsule assembly of aero-engine |
| CN113787509A (en) * | 2021-09-13 | 2021-12-14 | 江南大学 | Multi-pneumatic muscle cooperatively driven crustacean-imitated arthropod finger |
-
2013
- 2013-07-03 CN CN 201320392633 patent/CN203348657U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD4338C1 (en) * | 2013-05-21 | 2015-10-31 | Юрий ЩИГОРЕВ | Screw electric pump with autonomous cooling |
| CN112595476A (en) * | 2020-11-27 | 2021-04-02 | 中国航发四川燃气涡轮研究院 | Method and device for measuring rigidity of vacuum diaphragm capsule assembly of aero-engine |
| CN112595476B (en) * | 2020-11-27 | 2022-06-28 | 中国航发四川燃气涡轮研究院 | Method and device for measuring rigidity of vacuum diaphragm capsule assembly of aero-engine |
| CN113787509A (en) * | 2021-09-13 | 2021-12-14 | 江南大学 | Multi-pneumatic muscle cooperatively driven crustacean-imitated arthropod finger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Taiyuan Taihang Dirksen Fuild Control Technology Co., Ltd. Assignor: Taiyuan Aero-Instruments Co., Ltd. Contract record no.: 2015140000007 Denomination of utility model: Positive and negative pressure limit pressure protection device for vacuum manometer Granted publication date: 20131218 License type: Exclusive License Record date: 20150709 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20190703 |