CN209312668U

CN209312668U - Gas density relay

Info

Publication number: CN209312668U
Application number: CN201920408967.1U
Authority: CN
Inventors: 张开胜; 李一鹏; 杨云飞
Original assignee: LANSO KONLY (SHANGHAI) INSTRUMENTS CO Ltd
Current assignee: LANSO KONLY (SHANGHAI) INSTRUMENTS CO Ltd
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2019-08-27
Anticipated expiration: 2029-03-28

Abstract

The utility model discloses a kind of gas density relays, comprising: casing, pedestal, machine core, temperature compensating element, dial plate and pointer, wherein, machine core is set on pedestal, and it is fixedly connected with pedestal, temperature compensating element and dial plate are all set in casing, dial plate has shading region and indicators turn area, indicators turn area is arranged to engraved structure, shading region is located at position corresponding with temperature compensating element on dial plate, and shading region is arranged to light-shielding structure, exposes to temperature compensating element through dial plate to limit the light of the side on dial plate far from machine core；One end of pointer can rotate in indicators turn area.The gas density relay of this structure can avoid the temperature that gas density relay extraneous light generates and impact to the detection performance of temperature compensating element.

Description

Gas density relay

Technical field

The utility model relates to gas densities to control and monitor technical field more particularly to a kind of gas density relay.

Background technique

Now, various gas density relays are widely used in the every field such as power department, industrial and mining enterprises.Especially Sulfur hexafluoride gas density relay has good insulating properties and an arc-suppression function, the density direct relation of sulfur hexafluoride gas its Insulation and arc extinction performance, usually monitor the change of sulfur hexafluoride gas density in such equipment with sulfur hexafluoride gas density relay Change situation.Change since gas pressure varies with temperature, sulfur hexafluoride gas density relay is equipped with temperature-compensating member Part compensates this pressure change due to caused by temperature change, to guarantee the accuracy of density indicated value.

But in the prior art, the outdoor pointer gas density relay used due to arc aperture on dial plate presence, When the dial side of sunlight face gas density relay, sunlight can pass through transparent apparatus glass and arc aperture, direct projection On temperature compensating element.Since sensibility of the temperature compensating element to light and heat is high, temperature compensating element can be acted rapidly；And Sulfur hexafluoride gas in equipment is since equipment volume is larger, in addition the protection of device housings, pressure can't change rapidly, because This temperature compensating element is asynchronous with the variation of gas pressure in equipment, cause the pointer of gas density relay indicate it is abnormal or Abnormal alarm.As illustrated in figs, gas density relay in the prior art includes dial plate A, temperature compensating element B, arc Shape slot C and pointer D, wherein arc groove C is set on dial plate A, and pointer D is rotated in arc groove C, and temperature compensating element B is in table Projection on disk A is located in arc groove C, and light can be radiated on temperature compensating element B directly through arc groove C.

Therefore, gas density relay in the prior art has the disadvantage in that throwing of the temperature compensating element on dial plate Shadow is located in arc groove, and the arc groove direct irradiation of the light-transmissive dial plate outside gas density relay is in temperature-compensating member On part, to influence the detection performance of temperature compensating element.

Utility model content

Utility model aims to solve gas density relay in the prior art, there are gas density relays Exterior temperature change influences the problem of temperature compensating element detection performance.Therefore, the utility model provides a kind of gas density Relay, by the way that shading region is arranged on the dial plate of gas density relay, to limit the light outside gas density relay It shines directly on temperature compensating element, efficiently avoids inspection of the gas density relay extraneous light to temperature compensating element The influence for surveying performance, so that gas density relay provided by the utility model has the advantages that stable working performance.

In order to solve the above technical problems, the embodiments of the present invention discloses a kind of gas density relay, comprising: Casing, pedestal, machine core and temperature compensating element；Machine core is set on pedestal, and is fixedly connected with pedestal；Temperature compensating element is set It is placed in casing；

The gas density relay further include: dial plate, dial plate are set in casing, and are oppositely arranged with machine core；Dial plate tool There are shading region and indicators turn area, indicators turn area is arranged to engraved structure, and shading region is located on dial plate and temperature compensating element Corresponding position, and shading region is arranged to light-shielding structure, to block the light for being located at the side on dial plate far from machine core through dial plate Expose to temperature compensating element；

Pointer, one end of pointer passes through indicators turn area, and can move in indicators turn area, the other end of pointer with Machine core connection.

By adopting the above technical scheme, due to being provided with shading on the dial plate of gas density relay provided by the utility model Area, and shading region is located at position corresponding with temperature compensating element, shading region on dial plate and can limit positioned at dial plate far from machine core The light of side exposes on temperature compensating element through dial plate, avoids the temperature that the light outside gas density relay generates The detection performance of temperature compensating element is impacted, so that gas density relay provided by the utility model has workability The stable advantage of energy.

Further, the embodiments of the present invention discloses a kind of gas density relay, the setting of indicators turn area Camber slot, arc groove are set to the periphery of dial plate, and along the circumferentially extending of dial plate.

By adopting the above technical scheme, indicators turn area is set as arc groove, and arc groove is set to the periphery of dial plate, can make The structure for obtaining gas density relay provided by the utility model is simpler, and convenient for the processing of dial plate.

Further, the embodiments of the present invention discloses a kind of gas density relay, and pointer includes fixed frame And syringe needle.Syringe needle is located at the side on dial plate far from machine core, and one end of fixed frame is connect with machine core, and the other end passes through indicators turn The fixing end of area and syringe needle connection, so that the other end of the fixed frame can move in indicators turn area.

Further, the embodiments of the present invention discloses a kind of gas density relay, fixed frame and syringe needle The other end of fixing end connection is provided with bending section, and bending section passes through indicators turn area.

By adopting the above technical scheme, due to the setting of bending section on fixed frame, the fixing end and pointer that can avoid syringe needle turn The interior wall friction in dynamic area, and syringe needle is caused to damage.And the setting of bending section can guarantee pointer normal rotation in indicators turn area, So that the working performance of gas density relay provided by the utility model is more stable.

Further, the embodiments of the present invention discloses a kind of gas density relay, separate machine core on dial plate Side be additionally provided with identification information, circumferential direction setting of the identification information along indicators turn area.

By adopting the above technical scheme, the setting of identification information may make the indicated value of pointer more accurate on dial plate, favorably In the precision for the detected value for improving gas density relay.

Further, the embodiments of the present invention discloses a kind of gas density relay, gas density relay It further include watch glasses, watch glasses is set to side of the dial plate far from machine core, and watch glasses at least covers indicators turn area.

Since in practical work process, pointer and identification information on gas density relay are exposed to outer for a long time Portion will lead to its damage under the influence of external environment, influence the normal use of gas density relay.Therefore, use is above-mentioned Pointer and identification information can be isolated with external environment for the setting of technical solution, watch glasses, be conducive to extend the utility model offer Gas density relay service life, and improve gas density relay work stability.

Further, the embodiments of the present invention discloses a kind of gas density relay, temperature compensating element edge Projection of the thickness direction of dial plate on dial plate is located in shading region.

By adopting the above technical scheme, temperature compensating element is located at shading region along projection of the thickness direction on dial plate of dial plate Interior, such structure can avoid completely the light outside gas density relay from being irradiated on temperature compensating element, it is ensured that this reality With the normal use of the gas density relay of novel offer.

Further, the embodiments of the present invention discloses a kind of after gas density relay, and shading region, which has, to be hidden Light coating, shading coating are coated on the shading region of dial plate close to the side of temperature compensating element；Or,

Shading region has shading piece, and the side of shading piece is provided with first connecting portion, close temperature compensating element on dial plate Side be provided with second connecting portion, shading piece is detachably connected with dial plate by first connecting portion and second connecting portion, and hide Light part is located at dial plate close to the side of temperature compensating element.

By adopting the above technical scheme, shading region is set as shading coating, and shading coating is coated on shading region close to temperature The surface of the side of compensating element, since shading coating has the advantages that easy to process, at low cost, shading region is set as hiding Light coating may make gas density relay provided by the utility model to have the advantages that manufacturing cost is low.

Shading region is set as shading piece, and shading piece is detachably connected with dial plate by first connecting portion and second connecting portion It connects, since the design of this structure can facilitate shading piece and dial plate to dismantle, gas density relay may make to can be used for different rings Under border so that gas density relay provided by the utility model have the advantages that it is easy to use and adaptable.

Further, the embodiments of the present invention discloses one kind after gas density relay, and shading region is arranged to Nontransparent solid light-shielding structure.

Other features of the utility model and corresponding beneficial effect are described in the aft section of specification, and are answered Work as understanding, at least partly beneficial effect is apparent from from the record in the utility model specification.

Detailed description of the invention

Figure 1A is the schematic view of the front view of gas density relay in the prior art；

Figure 1B is the side structure schematic view of gas density relay shown in figure 1A；

Fig. 2 is the schematic cross-sectional view of gas density relay provided by the embodiment of the utility model；

Fig. 3 A is the front view structure signal of an embodiment of gas density relay provided by the embodiment of the utility model Figure；

Fig. 3 B is the side structure schematic view of gas density relay shown in Fig. 3 A；

Fig. 4 is the front view structure signal of another embodiment of gas density relay provided by the embodiment of the utility model Figure；

Fig. 5 is the front view structure signal of the another embodiment of gas density relay provided by the embodiment of the utility model Figure.

Description of symbols:

The prior art:

A: dial plate；B: temperature compensating element；C: arc groove；D: pointer.

The utility model:

1: pedestal；2: machine core；3: temperature compensating element；4: dial plate；5: indicators turn area；51: arc groove；6: pointer；61: Fixed frame；62: syringe needle；63: bending section；7: shading region；8: identification information；9: watch glasses；10 casings；11: bourdon tube；12: table glass Glass；13: lining ring.

Specific embodiment

The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by this theory The bright revealed content of book understands other advantages and effect of the utility model easily.Although the description of the utility model will tie It closes preferred embodiment to introduce together, but this feature for not representing this utility model is only limitted to the embodiment.On the contrary, knot Closing the purpose that embodiment makees utility model introduction is to be possible to extend to cover the claim based on the utility model Other selections or transformation out.In order to provide to the understanding of the depth of the utility model, be described below in will be comprising many specific Details.The utility model can also be implemented without using these details.In addition, in order to avoid the weight of chaotic or fuzzy the utility model Point, some details will be omitted in the de-scription.It should be noted that in the absence of conflict, in the utility model Feature in embodiment and embodiment can be combined with each other.

It should be noted that in the present specification, similar label and letter indicate similar terms in following attached drawing, because This does not need then to carry out further defining reconciliation to it in subsequent attached drawing once being defined in a certain Xiang Yi attached drawing It releases.

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer The embodiment of type is described in further detail.

The embodiments of the present invention provide a kind of gas density relay, as shown in Fig. 2, this gas density relay Device includes: pedestal 1, machine core 2, temperature compensating element 3 and casing 10；Machine core 2 is set on pedestal 1, and is fixed and connected with pedestal 1 It connects；Pedestal 1 and temperature compensating element 3 are all set in casing 10.

Further, as shown in Fig. 3 A- Fig. 5, gas density relay provided in this embodiment further includes dial plate 4 and refers to Needle 6, wherein dial plate 4 is set in casing, and is oppositely arranged with machine core 2；Dial plate 4 has shading region 7 and indicators turn area 5, refers to Needle rotational area 5 is arranged to engraved structure, and shading region 7 is located at position corresponding with temperature compensating element 3 on dial plate 4, and shading region 7 It is arranged to light-shielding structure, exposes to temperature-compensating member through dial plate 4 to limit the light of the side on dial plate 4 far from machine core 2 Part 3.One end of pointer 6 passes through indicators turn area 5, and moves in indicators turn area 5, and the other end and machine core 2 of pointer 6 connect It connects.

More specifically, the shading region 7 on dial plate 4 is set to position corresponding with temperature compensating element 3, and shading region 7 can Limitation is irradiated on temperature compensating element 3 perpendicular to the light on 4 direction of dial plate, is avoided perpendicular to the light on 4 direction of dial plate The temperature that line generates impacts temperature compensating element 3.

More specifically, machine core 2 is rotatably connected with pointer 6, and pointer 6 is located at far from the part of machine core 2 has hollow out knot It in the indicators turn area 5 of structure, and is rotated in indicators turn area 5, another part of pointer 6 stretches out in the outer of indicators turn area 5 Portion is used to indicate the show value of gas density relay.

Further, gas density relay provided in this embodiment, due to being provided with shading region 7, and shading on dial plate 4 Area 7 is located at position corresponding with temperature compensating element 3 on dial plate 4, and shading region 7 can limit one far from machine core 2 on dial plate 4 The light of side exposes on temperature compensating element 3 through dial plate 4, avoids the temperature that the light outside gas density relay generates The detection performance of temperature compensating element 3 is impacted, may make gas density relay provided in this embodiment that there is work The stable advantage of performance.

Further, as shown in Fig. 2, the gas density relay in the present embodiment further includes bourdon tube 11, watch crystal 12 With lining ring 13.Specifically, machine core 2, temperature compensating element 3, pointer 6, bourdon tube 11, watch crystal 12 and lining ring 13 are all set to machine In shell 10.Dial plate 4 is connected on lining ring 13, and dial plate 4 is oppositely arranged with machine core 2.Watch crystal 12 is set to dial plate 4 far from machine core 2 side, and it is fixed by lining ring 13 and casing 10.

1 part of pedestal is set in casing 10.Machine core 2 includes core print seat and transmission mechanism, core print seat and pedestal 1 in machine core 2 Part in casing 10 is fixedly connected.The output end of transmission mechanism in machine core 2 is connect with pointer 6, temperature compensating element 3 Both ends connect respectively with the input terminal of the transmission mechanism in bourdon tube 11 and machine core 2.In the course of work, when temperature change causes When air pressure change, telescopic variation can occur for temperature compensating element 3, link pointer 6 in dial plate 4 by the transmission mechanism in machine core 2 Upper movement, so that pointer 6 deflects, so as to compensate to this pressure change due to caused by temperature change, to guarantee The accuracy of density indicated value.In the present embodiment, machine core, the structure of temperature compensating element and spring tube portion and machine core with The mating part structure of pointer can use structure well known in the prior art, no longer excessively repeat herein.

Further, the present embodiment provides a kind of gas density relays, as shown in Fig. 3 A- Fig. 3 B, wherein indicators turn Area 5 includes arc groove 51, and arc groove 51 is set to the periphery of dial plate 4, and along the circumferentially extending of dial plate 4.

Specifically, arc groove 51 is arranged along the peripheral direction of dial plate 4, and the center of circle of arc groove 51 is located at machine core 2.And Arc groove 51 is engraved structure, and 6 part of pointer extend out to side of the dial plate 4 far from pedestal 1 through arc groove 51.

Further, in the present embodiment, the arc length of arc groove 51 can specifically be greater than the 1/4 of the outer arc length of dial plate 4, be less than The outer arc length of dial plate 4 can also be specifically arranged according to actual needs, to the specific length of the arc length of arc groove 51 in the present embodiment Degree is without limitation.

It is to be appreciated that the outer arc length of dial plate 4 is the maximum arc length of diameter on dial plate 4, the arc length of arc groove 51 is arc Arc length of the shape slot 51 close to 4 periphery of dial plate.

Further, indicators turn area 5 is set as arc groove 51, can make gas density relay provided by the utility model Structure it is simpler.

Further, as shown in Fig. 3 A- Fig. 3 B, pointer 6 includes fixed frame 61 and syringe needle 62, and syringe needle 62 is located on dial plate 4 Side far from machine core 2；One end of fixed frame 61 is connect with machine core 2, and the other end passes through the fixation in indicators turn area 5 and syringe needle 62 End connection, so that the other end of fixed frame 61 can move in indicators turn area 5.

Specifically, machine core 2 and one end of the fixed frame 61 in pointer 6 are rotatably connected, and fixed frame 61 is having around machine core 2 There are rotation, the other end of fixed frame 61 in the indicators turn area 5 of engraved structure to be fixedly connected with syringe needle 62, fixed frame 61 is around machine Syringe needle 62 is driven to rotate while core 2 rotates, the part of syringe needle 62 is located in the indicators turn area 5 with engraved structure, another Part stretches out in the outside of 6 behaviour area of pointer, and the free end of syringe needle 62 is used to indicate the show value of gas density relay.

Further, gas density relay provided in this embodiment, as shown in Fig. 3 A- Fig. 3 B, fixed frame 61 and syringe needle One end of 62 fixing end connection is provided with bending section 63, and bending section 63 passes through indicators turn area 5.

Specifically, bending section 63 is set to one end that fixed frame 61 is connect with syringe needle 62, the curved shape in bending section 63 with The shape in indicators turn area 5 matches so that pointer 6 can in indicators turn area 5 normal rotation.Therefore, this structure is set Meter is so that gas density relay provided in this embodiment avoids the inner wall of syringe needle 62 and indicators turn area 5 during the work time Friction, that is, avoid the contact of pointer 6 with dial plate 4, so that syringe needle 62 will not damage.

Further, gas density relay provided in this embodiment, as shown in fig. 4-5, far from machine core 2 on dial plate 4 Side be additionally provided with identification information 8, circumferential direction setting of the identification information 8 along indicators turn area 5.

Specifically, during the work time, 6 point identification information 8 of pointer can make staff clearly observe gas The show value of volume density relay.More specifically, identification information 8 can be graduation mark and bar (not shown) and Any one in various identification informations, the present embodiment is not specifically limited in this embodiment.

Further, when identification information 8 is graduation mark, graduation mark can be carved along indicators turn area 5 in the table of dial plate 4 On face, and specific scale value can be set according to actual design and use demand, and the present embodiment is not specifically limited in this embodiment.

Specifically, when identification information 8 is set as graduation mark, since graduation mark direct engraving is on the surface of dial plate 4, in reality Wear-resistant ability is stronger in the work of border.Therefore, identification information 8, which is set as graduation mark, may make gas provided in this embodiment close Degree relay has the advantages that long service life.

Further, when identification information 8 is bar, bar can be pasted on the table of dial plate 4 along indicators turn area 5 On face, and specific indicated value can be set according to actual design and use demand, and the present embodiment is not specifically limited in this embodiment.

Specifically, being directly adhered to due to bar on the surface of dial plate 4, when identification information 8 is set to indicate that in reality Bar simply can be pasted and be replaced in the work of border.Therefore, identification information 8 be set to indicate that item may make the present embodiment provides Gas density relay have the advantages that it is easy to process.

Further, gas density relay provided in this embodiment, as shown in figure 5, gas density relay further includes Watch glasses 9, watch glasses 9 is set to side of the dial plate 4 far from machine core 2, and watch glasses 9 at least covers indicators turn area 5.

Specifically, pointer 6 and identification information 8 on gas density relay are for a long time due in practical work process It is externally exposed, will lead to its damage under the influence of external environment, influence the normal use of gas density relay.Therefore, Pointer 6 and identification information 8 can be isolated with external environment for the setting of watch glasses 9.It is close to be conducive to extend gas provided in this embodiment The service life of relay is spent, and improves the stability of gas density relay work.

More specifically, watch glasses 9 is set to side of the dial plate 4 far from machine core 2, and is detachably connected with dial plate 4.

Further, watch glasses 9 provided in this embodiment can all block identification information 8 and indicators turn area 5, can also Only to block indicators turn area 5.When watch glasses 9 all blocks identification information 8 and indicators turn area 5, in order to enable work people Member clearly recognizes the detected value that pointer 6 indicates.Watch glasses 9 need to be made of transparent material.Specifically, the present embodiment provides Watch glasses can be by any in transparent glass common to those skilled in the art and transparent plastic and various transparent materials A kind of composition, the present embodiment do not limit this.

Specifically, watch glasses 9 can be transparent material when watch glasses 9 only blocks indicators turn area 5, specific material can basis Actual design and use demand setting, watch glasses provided in this embodiment do not limit this.

More specifically, watch glasses 9 is transparent glass cover, since transparent glass cover has the advantages that transparency is high, table Cover 9 is set as transparent glass cover and is conducive to reading of the staff to 6 indicated value of pointer in gas density relay.

More specifically, when watch glasses 9 is transparent plastic sheet, since transparent plastic sheet has durability high and long service life The advantages of, therefore, watch glasses 9 is set as the use longevity that transparent plastic sheet is conducive to improve the gas density relay that embodiment provides Life.

Further, in the present embodiment, when being provided with watch glasses 9, it can be not provided with watch crystal 12 shown in Fig. 2, It is also possible to watch glasses 9 and watch crystal 12 while is arranged, the present embodiment is not specifically limited in this embodiment, can be according to actual design and use Demand setting.

Further, gas density relay provided in this embodiment, as shown in Fig. 3 A- Fig. 5,3 edge of temperature compensating element The thickness direction of dial plate 4 is located in shading region 7 in the projection on dial plate 4.Specifically, thickness of the temperature compensating element 3 along dial plate 4 Direction is located in shading region 7 in the projection on dial plate 4, and the light that can block 4 external vertical of dial plate in 4 place plane of dial plate irradiates Onto temperature compensating element 3.So that the working performance of gas density relay provided in this embodiment is more stable.

Further, gas density relay provided in this embodiment, shading region 7 therein have shading coating (in figure It is not shown), shading coating is coated on shading region 7 close to the side of temperature compensating element 3.Specifically, shading region 7 is set as shading Coating, and shading coating is coated on dial plate 4 on the surface of 3 side of temperature compensating element, is convenient for since shading coating has Processing, advantage at low cost.Therefore, shading region 7, which is set as shading coating, may make gas density relay provided in this embodiment Device has the advantages that manufacturing cost is low.

Further, shading coating can be silver powder and iron powder common to those skilled in the art and each in the present embodiment Kind has any one in shading performance material, and the shading coating in the present embodiment does not limit this.

Further, gas density relay provided in this embodiment, as shown in Fig. 3 A- Fig. 5, shading region 7 therein has There is shading piece (not shown), the side of shading piece is provided with first connecting portion (not shown), close temperature on dial plate 4 The side of compensating element, 3 is provided with second connecting portion (not shown), and shading piece and dial plate 4 pass through first connecting portion and second Interconnecting piece is detachably connected, and shading piece is located at dial plate 4 close to the side of temperature compensating element 3.Specifically, first connecting portion is solid Surely it is set on the side of shading piece, second connecting portion is fixedly installed on position corresponding with compensating element, on dial plate 4.More have Body, since the design of this structure can facilitate shading piece and dial plate 4 to dismantle, gas density relay can be used for varying environment Under.Therefore, so that be originally embodiment provide gas density relay have the advantages that it is easy to use and adaptable.

Further, shading piece can be the plate that light screening material common to those skilled in the art forms in the present embodiment Or any one in sheet.It is common that being detachably connected of first connecting portion and second connecting portion can be skilled person Snap connection, sliding slot connection and it is various be detachably connected in any one.

Further, gas density relay provided in this embodiment, as shown in Fig. 3 A- Fig. 5, shading region 7 therein Position is arranged to nontransparent solid light-shielding structure, specifically, shading region 7 can be plastics common to those skilled in the art, rubber The solid construction of a variety of materials such as glue, the present embodiment are not specifically limited.

Further, nontransparent solid light-shielding structure is specifically as follows nontransparent solid barn door, can limit positioned at dial plate The light of side far from machine core exposes on temperature compensating element through dial plate, avoids the light outside gas density relay The temperature of generation impacts the detection performance of temperature compensating element, so that gas density relay provided in this embodiment has There is the advantages of stable working performance.More specifically, in the present embodiment, dial plate 4 can be made of nontransparent solid barn door.

Further, the other component for the gas density relay that the embodiments of the present invention provide can be existing The usually used component of gas density relay in technology, concrete model can be set according to actual design and use demand, The present embodiment does not limit this.

Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims

1. a kind of gas density relay, comprising: casing, pedestal, machine core and temperature compensating element, wherein the machine core setting In on the pedestal, and it is fixedly connected with the pedestal；The temperature compensating element is set in the casing；Its feature exists In the gas density relay further include:

Dial plate, the dial plate are set in the casing, and are oppositely arranged with the machine core；The dial plate has shading region and refers to Needle rotational area, the indicators turn area are arranged to engraved structure, and the shading region is located on the dial plate and the temperature-compensating The corresponding position of element, and the shading region is arranged to light-shielding structure, to block be located at the dial plate far from the machine core one The light of side is directed to the temperature compensating element through the dial plate；

One end of pointer, the pointer passes through the indicators turn area, and can move in the indicators turn area, the finger The other end of needle is connect with the machine core.

2. gas density relay as described in claim 1, which is characterized in that the indicators turn area is arranged to arc groove, The arc groove is set to the periphery of the dial plate, and along the circumferentially extending of the dial plate.

3. gas density relay as described in claim 1, which is characterized in that the pointer includes fixed frame and syringe needle, institute State the side that syringe needle is located at the separate machine core on the dial plate；One end of the fixed frame is connect with the machine core, the other end It is connect across the indicators turn area with the fixing end of the syringe needle, so that the other end of the fixed frame can be described Indicators turn moves in area.

4. gas density relay as claimed in claim 3, which is characterized in that the fixed frame is described solid with the syringe needle The other end of fixed end connection is provided with bending section, and the bending section passes through the indicators turn area.

5. gas density relay as described in claim 1, which is characterized in that far from the side of the machine core on the dial plate It is additionally provided with identification information, circumferential direction setting of the identification information along the indicators turn area.

6. gas density relay as described in claim 1, which is characterized in that the gas density relay further includes table Cover, the watch glasses is set to side of the dial plate far from the machine core, and the watch glasses at least covers the indicators turn area.

7. gas density relay as described in claim 1, which is characterized in that the temperature compensating element is along the dial plate Thickness direction is located in the shading region in the projection on the dial plate.

8. gas density relay as described in claim 1, which is characterized in that the shading region has shading coating, described Shading coating is coated on the shading region of the dial plate close to the side of the temperature compensating element；Or,

The shading region has shading piece, and the side of the shading piece is provided with first connecting portion, close to described on the dial plate The side of temperature compensating element is provided with second connecting portion, and the shading piece and the dial plate pass through the first connecting portion and institute It states second connecting portion to be detachably connected, and the shading piece is located at the dial plate close to the side of the temperature compensating element.

9. such as the described in any item gas density relays of claim 1-8, which is characterized in that the shading region is arranged to non- Bright solid light-shielding structure.