CN201171013Y - Pointer type SF6 gas density relay with standard watch dial - Google Patents
Pointer type SF6 gas density relay with standard watch dial Download PDFInfo
- Publication number
- CN201171013Y CN201171013Y CNU2008200553974U CN200820055397U CN201171013Y CN 201171013 Y CN201171013 Y CN 201171013Y CN U2008200553974 U CNU2008200553974 U CN U2008200553974U CN 200820055397 U CN200820055397 U CN 200820055397U CN 201171013 Y CN201171013 Y CN 201171013Y
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- China
- Prior art keywords
- density relay
- gas density
- pointer
- dial plate
- temperature
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides an indicating hand type SF6 gas density relay with a standard dial. The indicating hand type SF6 gas density relay with the standard dial comprises a casing and a pedestal, an indicating hand, a dial, a core, a bourdon tube, a temperature compensating plate, a crossbeam, a connecting rod, a plurality of pairs of respectively corresponding regulating rods, a microswitch, an end base and a locating piece. The indicating hand type SF6 gas density relay with the standard dial is characterized in that the pressure difference delta P between a minimum action contact point pressure value at the dial and the pressure value of an initiation point is more than or equal to 0.09Mpa. After the proposal is used in the indicating hand type SF6 gas density relay with the standard dial, the indicating hand type SF6 gas density relay with the standard dial can not cease to be in effect, can also ensure that the compensating plate and the indicating hand are not deformed in the environment with high temperature and greatly improves the performance of the density relay.
Description
Technical field
The utility model relates to a kind of relay, relates in particular to a kind of pointer SF6 gas density relay with the standard dial plate.
Background technology
The SF6 electric product has been widely used in power department, and industrial and mining enterprises have promoted the fast development of power industry.The reliable and secure operation that guarantees the SF6 electric product has become one of vital task of power department.The arc-extinguishing medium of SF6 electric product and dielectric are SF6 gas, can not leak gas, if leak gas, just can not guarantee the reliable and secure operation of SF6 electric product.So the SF6 density value of monitoring SF6 electric product is very necessary.
Be used for now monitoring that SF6 density adopts is the no oil type SF6 gas density relay that a kind of contact adopts sensitive switch, the structure of this relay such as Fig. 1, Fig. 2 and shown in Figure 3, it comprises SF6 gas connection 1, movement 2, housing 3, dial plate 4, pointer 5, Bourdon tube 6, temperature-compensating sheet 7, terminal box 8, sensitive switch 91,92,93, printed circuit board 10, keeper 11, fixed head 12, electric wire 13, adjusting rod 141,142,143, connecting rod 15, crossbeam 16, watch crystal 17, cover circle 18, pedestal 19 and SF6 air shooter 20.Wherein, SF6 gas connection 1, terminal box 8, watch crystal 17, cover circle 18 and pedestal 19 are separately fixed on the housing 3.Movement 2 is fixed on the pedestal 19, and pointer 5 and dial plate 4 are separately fixed on the movement 2.One end of Bourdon tube 6 is welded on the pedestal 19 and is communicated with it, and the other end is connected with an end of temperature-compensating sheet 7, and the other end of temperature-compensating sheet 7 is connected with crossbeam 16, and crossbeam 16 is connected with connecting rod 15 again, and connecting rod 15 is connected with movement 2.Be fixed with adjusting rod 141,142,143 on the crossbeam 16.Sensitive switch 91,92,93 is welded on respectively on the printed circuit board 10, and printed circuit board 10 is installed on the fixed head 12, and fixed head 12 is installed in again on the pedestal 19.Sensitive switch 91 is fixed on the below of adjusting rod 141, and sensitive switch 92 is fixed on the below of adjusting rod 142, and sensitive switch 93 is fixed on the below of adjusting rod 143.Be respectively equipped with motion arm 911,921,931 on each sensitive switch.Keeper 11 is fixed on the movement 2; its front end extends to the below of the end that Bourdon tube 6 links to each other with temperature-compensating sheet 7; its function is: when the SF6 gas density drops to certain value; spacing Bourdon tube 6 moves down; the protection sensitive switch; and then protection crossbeam 16 do not damaged by pressure and is out of shape, and makes whole system keep reliably working.The contact of sensitive switch by electric wire 13, is connected on the terminal box 8 from printed circuit board 10, and terminal box 8 is fixed on the watchcase 3.Watch crystal 17, cover circle 18 are separately fixed on the watchcase 3, can protect its internal mechanism to avoid mechanical damage and dirt, rainwater are invaded.One end of SF6 air shooter 20 is connected with pedestal 19, and positiver sealing, and the other end of SF6 air shooter 20 is connected with joint 1, and positiver sealing.
Though the sensitive switch that above-mentioned SF6 gas density relay is adopted has certain advantage, because keeper 11 fixed positions are incorrect in this SF6 gas density relay.Normal pressure operating value when for example the locking contact of the specified requirement of present a kind of density monitor is 20 ℃ is a 0.33Mpa (relative pressure, absolute pressure is 0.43Mpa), but when this density monitor actual pressure drops to the (relative pressure smaller or equal to 0.25Mpa, absolute pressure is 0.35Mpa) time, keeper just begins spacing Bourdon tube and moves down.In the time of so just may causing this density monitor to be lower than-35 ℃ in temperature, the blocking function of this density monitor just lost efficacy, even the whole light leaks of SF6 gas promptly on the SF6 electric equipment, can not send block signal yet.Because SF6 gas is along with the reduction of temperature, its force value also reduces accordingly, when being lower than-35 ℃ in temperature, normal pressure operating value---0.33Mpa (relative pressure when the locking contact of its specified requirement is 20 ℃, absolute pressure is 0.43Mpa) the corresponding actual pressure of corresponding density value is lower than 0.25Mpa (relative pressure, absolute pressure are 0.35Mpa).So reflection force value that Bourdon tube just can not be correct just makes the blocking function of this density monitor just lose efficacy, and can not guarantee system's reliably working.
The dial plate of this density monitor in addition, its starting point force value is a 0.25Mpa (relative pressure, absolute pressure is 0.35Mpa), (the i.e. desired action connection point force value of the actual minimum of the applied SF6 electric equipment of this density monitor of minimum movements contact pressure value on its dial plate of this density monitor so, refer generally to block action value or actuation of an alarm value, and the normal pressure value when referring to 20 ℃) and the starting point force value between pressure differential Δ P≤0.08Mpa.Use under 30 ℃ and above environment like this, the compensating plate of relay and pointer can be out of shape, and can not stably work, and can not guarantee system's reliably working.
Summary of the invention
The purpose of this utility model is to solve the problems referred to above that prior art exists, and a kind of pointer SF6 gas density relay with the standard dial plate is provided.
The purpose of this utility model is achieved in that a kind of pointer SF6 gas density relay with the standard dial plate, it comprises housing and is arranged on housing interior pedestal, pointer, dial plate, movement, Bourdon tube, temperature-compensating sheet, crossbeam, connecting rod, some to each self-corresponding adjusting rod and sensitive switch, end seat and keeper, end seat wherein is fixed on the end of Bourdon tube and links to each other with an end of temperature-compensating sheet, and keeper is fixed in the housing, its front end extends to the below of the end seat that Bourdon tube links to each other with the temperature-compensating sheet, it is characterized in that:
Pressure differential Δ P 〉=0.09Mpa on the described dial plate between minimum movements contact pressure value and the starting point force value;
Again, its scope of the rated operating pressure of described this density monitor is 0.31～0.45Mpa, and promptly absolute pressure is 0.41～0.55Mpa.
Describedly somely can be 1 pair, 2 pairs, 3 pairs or 4 pairs to each self-corresponding adjusting rod and sensitive switch.
The pointer SF6 gas density relay of the utility model band standard dial plate makes it have following advantage and characteristics owing to adopted above technical scheme:
1, (minimum operating temperature is-40 ℃) density monitor can not lose efficacy under low temperature environment, and the system of assurance reliably working;
2, use under 30 ℃ and above environment, the compensating plate of density monitor and pointer can not be out of shape, and can stably work, improved greatly should pointer-type SF6 gas density relay performance.
Description of drawings
Fig. 1 is the structural representation of prior art pointer-type SF6 gas density relay;
Fig. 2 is the structural representation of the local side-looking of prior art pointer-type SF6 gas density relay;
Fig. 3 is the structural representation of the dial plate of prior art pointer-type SF6 gas density relay;
Fig. 4 is the structural representation of the pointer SF6 gas density relay of the utility model band standard dial plate;
Fig. 5 is the structural representation of the local side-looking of pointer SF6 gas density relay of the utility model band standard dial plate;
Fig. 6 is the structural representation of dial plate of the pointer SF6 gas density relay of the utility model band standard dial plate.
Embodiment
Referring to Fig. 5 and Fig. 6, the sensitive switch in this implementation example and the quantity of corresponding adjusting rod are 3 pairs referring to Fig. 4, cooperation, in addition its locking normal pressure value P
20 ℃Be 0.33Mpa (relative pressure), or 0.43Mpa (absolute pressure).The pointer SF6 gas density relay of the utility model band standard dial plate is mainly by joint, movement 32, watchcase, dial plate, pointer 35, Bourdon tube 36, temperature-compensating sheet 37, terminal box, 3 pairs of corresponding separately sensitive switch and adjusting rods that are provided with (are respectively sensitive switch 391,392 and 393 and adjusting rod 441,442 and 443), printed circuit board 40, keeper 41, fixed head 42, electric wire 43, connecting rod 45, crossbeam 46, watch crystal 47, cover circle 48, end seat 49, pedestal 50, backing plate 51 and deferent are formed.Wherein, joint is fixed on the watchcase, and movement 32 is fixed on the pedestal 50, and pedestal 50, backing plate 51 fuse and be fixed on the watchcase.One end of Bourdon tube 36 is welded on the pedestal 50, and the other end is connected with an end of temperature-compensating sheet 37 by end seat 49, and the other end of temperature-compensating sheet 37 is connected with crossbeam 46.Be fixed with adjusting rod 441,442,443 on the crossbeam 46.Crossbeam 46 is connected with connecting rod 45 again, and connecting rod 45 is connected with movement 32 again.Sensitive switch 391,392,393 is welded on respectively on the printed circuit board 40, and printed circuit board 40 is fixed on the fixed head 42, and fixed head 42 is installed in again on the pedestal 50.Sensitive switch 391,392,393 correspondences in the present embodiment are arranged on the below of each adjusting rod, wherein, sensitive switch 391 is fixed on the below of adjusting rod 441, and sensitive switch 392 is fixed on the below of adjusting rod 442, and sensitive switch 393 is fixed on the below of adjusting rod 443.Present embodiment keeper 41 is fixed on the movement 32, and pointer 35 and dial plate are separately fixed on the movement 32.Be respectively equipped with motion arm 3911,3921,3931 on each sensitive switch.The contact of sensitive switch is connected on the terminal box from printed circuit board 40 by electric wire 43, and terminal box is fixed on the watchcase.Watch crystal, cover circle are separately fixed on the watchcase, can protect its internal mechanism to avoid mechanical damage and dirt, rainwater are invaded.One end of deferent is connected with pedestal 50, and positiver sealing; The other end of deferent is connected with joint, and positiver sealing.
Among Fig. 5, the normal pressure operating value P when 20 ℃ of the locking of its specified requirement of pointer SF6 gas density relay of described band standard dial plate and/or warning contacts
20 ℃Be 0.33Mpa (relative pressure), or during 0.43Mpa (absolute pressure), and its fixing position of described keeper can guarantee: when this density monitor actual pressure drops to smaller or equal to 0.24Mpa (relative pressure), or during 0.34Mpa (absolute pressure), keeper just begins spacing Bourdon tube and moves down, promptly work as this density monitor actual pressure greater than 0.24Mpa (relative pressure), or during 0.34Mpa (absolute pressure), described keeper is not play spacing Bourdon tube to move down effect, Bourdon tube is can be free-moving, if this moment, the indicated indicating value of its pointer was correct when loading onto the dial plate of OK range.Though because SF6 gas is along with the reduction of temperature, its force value also reduces accordingly, when being lower than near-40 ℃ (minimum operating temperature) in temperature, the normal pressure operating value P during 20 ℃ of the locking contacts of its specified requirement
20 ℃The corresponding actual pressure of pairing density value is 0.24Mpa (relative pressure, absolute pressure are 0.34Mpa) during for 0.33Mpa (relative pressure, absolute pressure are 0.43Mpa).This is worth 0.24Mpa (relative pressure), or 0.34Mpa (absolute pressure) is greater than or equal to the spacing value 0.24Mpa (relative pressure) of keeper to Bourdon tube, or 0.34Mpa (absolute pressure), so Bourdon tube can also correctly reflect force value when low temperature, the blocking function of this density monitor just can not lose efficacy, and can guarantee system's reliably working.And as shown in Figure 6, the dial plate of this density monitor, its starting point force value is a 0.20Mpa (relative pressure, absolute pressure is 0.30Mpa), the pressure differential Δ P=0.13Mpa 〉=0.09Mpa between minimum movements locking contact pressure value and the starting point force value on this its dial plate of novel density monitor so.Make under hot environment that so the compensating plate of relay and pointer can not be out of shape, can guarantee that this relay stably works, also can guarantee system's reliably working.
The action principle of the pointer SF6 gas density relay of the utility model band standard dial plate is based on flexible member Bourdon tube 36, utilizes the pressure and temperature of 37 pairs of variations of temperature-compensating sheet to revise, the variation of the SF6 gas density in the reaction airtight container.Promptly under the pressure effect of measured medium SF6 gas, because the effect of temperature-compensating sheet 37 has been arranged, the variation of its density value, force value also changes accordingly, force the end of Bourdon tube 36 to produce corresponding strain-displacement,, pass to movement 32 by means of temperature-compensating sheet 37 and connecting rod 45, movement 32 passes to pointer 35 again, then tested SF6 gas density value is indicated on dial plate.If leaked gas, its density value drops to a certain degree (reach and report to the police or the locking value), Bourdon tube 36 produces accordingly to bottom offset, by temperature-compensating sheet 37, make crossbeam 46 to bottom offset, the adjusting rod 441,442,443 on the crossbeam 46 just promotes the contact of corresponding sensitive switch 391,392,393 and connects, and sends corresponding signal (reporting to the police or locking), reach the SF6 gas density in the equipment such as supervision and control electric switch, make the electric equipment trouble free service.If its density value has raise, force value also raises accordingly, be elevated to a certain degree, Bourdon tube 36 also produces accordingly to top offset, by temperature-compensating sheet 37, makes crossbeam 46 to top offset, adjusting rod 441,442,443 on the crossbeam 46 is just to top offset, adjusting rod 441,442,443 is just away from sensitive switch 391,392,393, and its contact just disconnects, and signal (reporting to the police or locking) is just removed.So just finish the function of density monitor.
The rated operating pressure scope of the utility model density monitor is that (relative pressure, promptly absolute pressure is 0.41～0.55Mpa) to 0.31～0.45Mpa.
The utility model is owing to the pressure differential Δ P 〉=0.09Mpa between minimum movements contact pressure value on the dial plate and the starting point force value, also done correct processing simultaneously at the keeper fixed position, make and can not lose efficacy at low temperature environment lower density relay, and the system of assurance reliably working; Can also make under hot environment that the compensating plate of relay and pointer can not be out of shape, can stably work, improved greatly should pointer-type SF6 gas density relay performance.Simultaneously also because the length that this SF6 gas density relay is arranged on the motion arm on each sensitive switch can be designed as 21～50mm, the impulse stroke of the motion arm of sensitive switch is big, element such as adjusting rod or compensating plate changes slightly, just not too can influence the precision of density monitor, simultaneously when debugging, also be easy to precision transfer very accurate, be easy to make high-precision density monitor.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, and all will drop in claims scope of the present invention variation, the modification of the above embodiment.Also can be fixed on the top (being other direction) of adjusting rod as sensitive switch.
Claims (2)
1, a kind of pointer SF6 gas density relay with the standard dial plate, it comprises housing and is arranged on housing interior pedestal, pointer, dial plate, movement, Bourdon tube, temperature-compensating sheet, crossbeam, connecting rod, some to each self-corresponding adjusting rod and sensitive switch, end seat and keeper, end seat wherein is fixed on the end of Bourdon tube and links to each other with an end of temperature-compensating sheet, and keeper is fixed in the housing, its front end extends to the below of the end seat that Bourdon tube links to each other with the temperature-compensating sheet, it is characterized in that:
Pressure differential Δ P 〉=0.09Mpa on the described dial plate between minimum movements contact pressure value and the starting point force value;
Again, its scope of the rated operating pressure of described this density monitor is 0.31～0.45Mpa, and promptly absolute pressure is 0.41～0.55Mpa.
2, the pointer SF6 gas density relay of band standard dial plate as claimed in claim 1 is characterized in that: describedly somely can be 1 pair, 2 pairs, 3 pairs or 4 pairs to each self-corresponding adjusting rod and sensitive switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200553974U CN201171013Y (en) | 2008-02-03 | 2008-02-03 | Pointer type SF6 gas density relay with standard watch dial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200553974U CN201171013Y (en) | 2008-02-03 | 2008-02-03 | Pointer type SF6 gas density relay with standard watch dial |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201171013Y true CN201171013Y (en) | 2008-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200553974U Expired - Lifetime CN201171013Y (en) | 2008-02-03 | 2008-02-03 | Pointer type SF6 gas density relay with standard watch dial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201171013Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568352A (en) * | 2019-09-04 | 2019-12-13 | 上海卓电电气有限公司 | Intelligent detection device, method and monitoring system for density relay without maintenance |
-
2008
- 2008-02-03 CN CNU2008200553974U patent/CN201171013Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568352A (en) * | 2019-09-04 | 2019-12-13 | 上海卓电电气有限公司 | Intelligent detection device, method and monitoring system for density relay without maintenance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161221 Address after: 200237 Minhang District Lotus Road, Lane 155, room 32, No. 1102, room Patentee after: Shanghai joy Electric Co., Ltd. Address before: 200237 Shanghai Lotus Road, Lane 155, room 32, No. 1102 Patentee before: Shanghai Roye Electronic Science & Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081224 |
|
| CX01 | Expiry of patent term |