CN209296680U - Gas density detecting device - Google Patents

Abstract

The utility model provides a kind of gas density detecting device, comprising: test section, including adapter and temperature/pressure sensor；Watchcase has axial upper first end and second end, which is that the second end is provided with the tubular structure of opening, and the detection position is outside the watchcase；Mounting bracket is arranged in the watchcase and connect with the end plates, the first threaded hole is provided in the mounting bracket；Transmitter mainboard, the mounting bracket is sequentially connected with the transmitter mainboard along first direction, the transmitter mainboard has with the first threaded hole equal diameter and with first threaded hole along second threaded hole axially aligned, so that the transmitter mainboard is connected through a screw thread with the mounting bracket；The cover is detachably connected with the second end of the watchcase, to close the opening；The outside of the watchcase is arranged in cable, is electrically connected with the transmitter mainboard.Gas density detecting device provided by the utility model is convenient to realize Function Extension, meets the diversity requirement of client.

Description

Gas density detecting device

Technical field

The utility model relates to gas monitoring techniques field more particularly to a kind of gas density detecting devices.

Background technique

With the development of industrial production and science and technology, gas is applied more and more widely in industry, medicine, the most advanced branches of science In technology and daily life.Such as application, high-purity gas application as industrial media of the inert gas as protective gas It is to measure an important indicator of gas working performance Deng, gas density.

By taking SF6 (sulfur hexafluoride) gas as an example, under uniform electric field, the insulating properties of SF6 is three times of air, big at four Under air pressure, the suitable transformer oil of insulating properties.Therefore, using sulfur hexafluoride gas as the electrical of arc-extinguishing medium and dielectric Product has been widely used in power department and industrial and mining enterprises, for example, SF6 breaker, GIS, SF6 insulated power pipeline, SF6 transformer etc..In use, cannot guarantee the reliable and secure operation of SF6 electric product, therefore, having must if gas leakage occurs for SF6 The density of SF6 is monitored in real time.

But gas density detecting device function setting in the prior art is fixed, interchangeability is poor, is not able to satisfy client Diversity requirement.

Utility model content

Utility model aims to solve the above problems in the prior art.

The utility model provides a kind of gas density detecting device, comprising: test section, including adapter and setting exist Temperature/pressure sensor inside the adapter, the adapter can be with gas connections to be detected；Watchcase has axial upper first end And second end, the watchcase are that the second end is provided with the tubular structure of opening, the test section passes through the first end End plates be mounted on outside the watchcase；Mounting bracket is arranged in the watchcase and connect with the end plates, the peace The first threaded hole is provided on dress bracket；Transmitter mainboard is electrically connected with the temperature/pressure sensor, the mounting bracket with it is described Transmitter mainboard is sequentially connected along first direction, the first direction for it is parallel with the axial direction and from the first end be directed toward institute State the direction of second end；The transmitter mainboard has with the first threaded hole equal diameter and with first threaded hole along institute The second threaded hole axially aligned is stated, so that the transmitter mainboard is connected through a screw thread with the mounting bracket；The cover, with The second end of the watchcase is detachably connected, to close the opening；The outside of the watchcase is arranged in cable, with The transmitter mainboard electrical connection.

Optionally, the mounting bracket includes leading to stud and installation along sequentially connected first single head of the first direction Plate, the threaded shank that first single head leads to stud are screwed with the watchcase；The head that first single head leads to stud is connected to institute It states on mounting plate, counterbore is provided on the mounting plate, the mounting plate passes through the bolt and first list in the counterbore The head of logical stud screws.

It optionally, further include the relay mainboard being electrically connected with the transmitter mainboard, the relay mainboard is located at institute Transmitter mainboard is stated along the downstream of the first direction, the relay mainboard have with the second threaded hole equal diameter and with The third threaded hole that second threaded hole is axially aligned described in, so that the relay mainboard and the transmitter mainboard It is mechanically connected by screw thread.

Optionally, the relay mainboard and the transmitter mainboard lead to Stud connection by the second single head, and described second The threaded shank that single head leads to stud screws simultaneously with first threaded hole, second threaded hole；Second single head leads to stud Head be connected to the relay mainboard towards on the side of the transmitter mainboard, the relay mainboard passes through described the The head that bolt in three threaded holes leads to stud with second single head screws.

Optionally, it is connected through a screw thread between the watchcase and the cover, wherein there is the first outer spiral shell on the watchcase Line has the first internal screw thread in the cover；The first sealing ring is provided between the watchcase and the cover, described first It, can be close by described first by the described first externally threaded screw thread end face during the screwing of external screw thread and first internal screw thread Seal is pressed on the bottom wall of the cover.

Optionally, the outer peripheral surface of first sealing ring is step shaft-like, the small diameter portion of the outer peripheral surface and the watchcase Inner surface fitting, the large-diameter portion of the outer peripheral surface is bonded with the inner surface of the cover.

Optionally, the end face of the cover has peephole, and the monitoring device further includes display, and the display is used In the density value for externally showing gas to be detected by the peephole；The maximum outside diameter of the display is interior with the cover Diameter is equal, in first external screw thread and during screwing of first internal screw thread, can pass through the described first externally threaded spiral shell The display is pressed together on the bottom wall of the cover by line end face.

Optionally, it is additionally provided with the first sealing ring between the display and the first externally threaded screw thread end face, It, can be simultaneously by first sealing ring and the display during the screwing of first external screw thread and first internal screw thread It is pressed together on the bottom wall of the cover.

Optionally, the display include along the sequentially connected display main board of first direction, panel and panel pad pasting, Pass through while penetrating through the threaded fastener connection of three between three；Wherein, display main board is electrically connected with the transmitter mainboard It connects；The display is pressed together in the cover by the first externally threaded screw thread end face by pressing the panel.

Optionally, the watchcase is connected by the cover of transferring with the cover, and the axial ends of the switching the cover is all provided with It is equipped with opening；It is connected through a screw thread between the watchcase and the switching the cover, between the switching the cover and the cover； The monitoring device includes the relay mainboard being electrically connected with the transmitter mainboard, and is electrically connected with the relay mainboard Display main board.

Optionally, the switching the cover has the second internal screw thread, the interior of the cover of transferring close to one end of the watchcase Annular ridge is provided on wall, the annular ridge is located at second internal screw thread along the downstream of the first direction；The table It is provided with the second sealing ring between shell and the switching the cover, in screwing for first external screw thread and second internal screw thread Second sealing ring can be pressed on the annular ridge by Cheng Zhong by the described first externally threaded screw thread end face.

Optionally, the adapter is internally provided with along the axially extending inner cavity, the size of the inner cavity with it is described The shape of temperature/pressure sensor matches, so that the temperature/pressure sensor is embedded in the inner cavity, and the temperature/pressure sensor Axial one end abutted with the end plates；The adapter has the binding face to fit with the end plates of the watchcase, institute It states and offers tapped blind hole on binding face, by screwing in the tapped blind hole between the adapter and the end plates of the watchcase Assembly be bolted；The signal wire of the temperature/pressure sensor is penetrated into described by the cable-through hole being provided on the end plates Inside watchcase.

Optionally, connected between the axial other end of the temperature/pressure sensor and the bottom wall of the inner cavity by third sealing ring It connects, the extending direction of the assembly bolt is parallel with the axial direction, when screwing the assembly bolt, can be passed by the temperature and pressure Sensor compresses the third sealing ring.

Optionally, the axial middle part of the temperature/pressure sensor side has annular groove, is provided in the annular groove Seal the 4th sealing ring of the temperature/pressure sensor side Yu the intracavity sidewall；The inner cavity has towards one end of the watchcase Have an opening, the opening offers chamfering, the chamfering, the temperature/pressure sensor, the first end end plates three enclose At toroidal cavity in be provided with the 5th sealing ring.

Optionally, the 6th sealing ring is provided between the binding face and the end plates, the 6th sealing ring is located at The radial outside of the tapped blind hole.

Optionally, the watchcase includes the pressing ring being arranged on the end plates inner surface, and the assembly bolt is successively worn The pressing ring, the end plates are crossed to screw with the tapped blind hole；Pass through screw thread between the mounting bracket and the pressing ring Connection.

Optionally, the transmitter mainboard has 485 remote-transmission modules.

Optionally, the gas to be detected is SF6 gas.

Monitoring device provided in this embodiment is provided with threaded hole on transmitter mainboard, which can be used as The connecting interface of transmitter mainboard and mounting bracket also can be used as the connecting interface of the electronic component of subsequent expansion；Namely It says, when needing to carry out Function Extension to monitoring device, it is convenient to by other electronic components (for example, other function mainboard) It is conveniently connected to transmitter mainboard by the threaded hole, fast implements Function Extension.In addition, being removable between watchcase and the cover Connection is unloaded, when monitoring device needs Function Extension, the cover can be opened, electronic component to be extended is connected to transmitter Mainboard, then the cover is covered, it is convenient to it realizes Function Extension, meets the diversity requirement of client.

Detailed description of the invention

Fig. 1 a is a kind of explosive view of monitoring device provided by the embodiment of the utility model；

Fig. 1 b is a kind of cross-sectional view of monitoring device provided by the embodiment of the utility model；

Fig. 1 c is a kind of connection structure diagram of monitoring device watchcase and the cover provided by the embodiment of the utility model；

Fig. 2 a is the explosive view of another monitoring device provided by the embodiment of the utility model；

Fig. 2 b is the cross-sectional view of another monitoring device provided by the embodiment of the utility model；

Fig. 3 a is the explosive view of another monitoring device provided by the embodiment of the utility model；

Fig. 3 b is the cross-sectional view of another monitoring device provided by the embodiment of the utility model；

Fig. 4 a is the explosive view of another monitoring device provided by the embodiment of the utility model；

Fig. 4 b is the cross-sectional view of another monitoring device provided by the embodiment of the utility model.

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.

In the utility model, electrical connection refers to the connection that can transmit signal (including control signal and data signal), and machinery is even Connect the connection referred in structure, the fixation for each components position.

With reference to Fig. 1 a and Fig. 1 b, a kind of gas density detecting device 1, including test section 11, watchcase are present embodiments provided 12, mounting bracket 13, transmitter mainboard 16 and the cover 15.

Test section 11 includes adapter 112 and temperature/pressure sensor 111, and adapter 112 is arranged in temperature/pressure sensor 111 It is internal.Adapter 112 can with gas connection to be detected, for example, be connected to SF6 insulated power pipe, thus, gas (example to be detected Such as, SF6 gas) it can enter inside adapter 112, it is arranged on the temperature/pressure sensor 111 inside adapter 112 and senses. After temperature/pressure sensor 111 senses the temperature and pressure of gas to be detected, corresponding electric signal output is converted it to.This Known in field, according to the temperature and pressure of gas to be detected, the density of gas to be detected can be calculated, therefore, temperature and pressure sensing The effect of device 111 is to provide parameter necessary to calculating gas density to be detected.It should be noted that gas to be detected is unlimited In SF6 gas, any gas, such as CF4, SF6 and the mixed gas of nitrogen etc. can be.

Watchcase 12 has the first end 12a and second end 12b in axial direction, wherein and first end 12a has end plates 121, the Two end 12b have opening, that is to say, that watchcase 12 is the tubular structure for having opening in second end 12b, and test section 11 is used as one A independent component is mounted on the end plates 121 of 12 first end 12a of watchcase, for accommodating monitoring device 1 inside watchcase 12 Each mainboard.

Mounting bracket 13 is arranged inside watchcase 12, for installing transmitter mainboard 16.Specifically, mounting bracket 13 and end face Plate 121 is connected, for example, being connect by screw thread with end plates 121.Further, the first threaded hole is provided in mounting bracket 13 13a。

Transmitter mainboard 16 is electrically connected with temperature/pressure sensor 111, can receive the temperature letter that temperature/pressure sensor 111 detects Number and pressure signal, the temperature signal and pressure signal can be also further scaled to the density of gas to be detected.Mounting bracket 13 with transmitter mainboard 16 along first direction (diagram A to, i.e., it is parallel with above-mentioned axial direction and by first end 12a direction second end 12b Direction) be sequentially connected, that is to say, that transmitter mainboard 16 is mounted on mounting bracket 13 towards the side of second end 12b.Pick-up Device mainboard 16 has and isodiametric second threaded hole 161 of the first threaded hole 13a, the first threaded hole 13a and the second threaded hole 161 It is axially aligned, by passing through the first threaded hole 13a, second threaded hole 161 between transmitter mainboard 16 and mounting bracket 13 Threaded fastener connection.In the present embodiment, the first threaded hole 13a, the second threaded hole 161 are respectively 2, in other embodiments In, the first threaded hole, the second threaded hole may be other quantity.

The cover 15 is detachably connected with the second end 12b of watchcase 12, to close opening.I.e. the cover 15 can be by watchcase 12 Second end 12b closing, so that an enclosure space is surrounded jointly with watchcase 12, it is anti-to be formed to each element inside watchcase 12 Shield.

The outside of watchcase 12 is arranged in cable 17, is electrically connected with transmitter mainboard 16, between transmitter mainboard 16 Signal exchange is carried out, can also can transmit outward the signal in transmitter mainboard 16 to 16 input signal of transmitter mainboard.

Monitoring device 1 provided in this embodiment is provided with the second threaded hole 161, the second screw thread on transmitter mainboard 16 Hole 161 can be used as the connecting interface of transmitter mainboard 16 Yu mounting bracket 13, also can be used as the electronics member device of subsequent expansion The connecting interface of part；That is, when needing to carry out Function Extension to monitoring device 1, it is convenient to by other electronics member devices Part (for example, other function mainboards) is conveniently connected to transmitter mainboard 16 by the second threaded hole 161, fast implements function Extension.In addition, to be detachably connected between watchcase 12 and the cover 15, it, can be by the cover 15 when monitoring device 1 needs Function Extension It opens, electronic component to be extended is connected to transmitter mainboard 16, then the cover 15 is covered, it is convenient to realize function It can extension.

In the present embodiment, mounting bracket 13 includes leading to stud 131 and installation along sequentially connected first single head of first direction Plate 132.It is the prior art, including head and threaded shank that single head, which leads to stud, and threaded shank has external screw thread, and head has internal screw thread, Preferably, external screw thread and internal screw thread screw thread model having the same (including thread form, nominal diameter, screw pitch).First single head leads to spiral shell The threaded shank of column 131 is screwed with watchcase 12, be can be and is directly screwed, for example, screwing with end plates 121；It is also possible to revolve indirectly It closes, for example, being screwed with the transition plates being connected on end plates 121.

The head end that first single head leads to stud 131 is connected on mounting plate 132, is specifically connected to 132 court of mounting plate To on the side of first end 12a, mounting plate 132 is provided with counterbore 132a on position corresponding with the logical stud 131 of the first single head, Bolt is provided in counterbore 132a, bolt passes through counterbore 132a and leads to the internal screw thread rotation on 131 head of stud in the first single head It closes, mounting plate 132 is fixed on the first single head and is led on stud 131, so that mounting plate 132 is fixed on watchcase 12 indirectly On.In the present embodiment, bolt is trapped in counterbore 132a in counterbore 132a, i.e. the bolt head of the bolt does not protrude from mounting plate 132 surfaces.In the present embodiment, the quantity that the first single head leads to stud 131 is 2, and in other embodiments, the first single head leads to stud It can be other quantity.

It in the present embodiment, is connected through a screw thread between watchcase 12 and the cover 15, wherein there is the first external screw thread on watchcase 12 122, there is in the cover 15 first internal screw thread 151.Further, the first sealing ring 21 is provided between watchcase 12 and the cover 15, During the first external screw thread 122 and the first internal screw thread 151 screw, the screw thread end face 122a of the first external screw thread 122 can be passed through First sealing ring 21 is pressed on the bottom wall of the cover 15.

Specifically, with reference to Fig. 1 c, the outer peripheral surface of the first sealing ring 21 is step shaft-like, the small diameter portion and watchcase 12 of outer peripheral surface Inner surface fitting, the large-diameter portion of outer peripheral surface is bonded with the inner surface of the cover 15, and the screw thread end face 122a of the first external screw thread 122 can The step surface of outer peripheral surface is squeezed, to the first sealing ring 21 is pressed on the bottom wall of the cover 15, to realize watchcase 12 and cover Sealing between lid 15.

A and Fig. 1 b is continued to refer to figure 1, adapter 112 is internally provided with the inner cavity axially extended, the size and temperature of inner cavity The shape of pressure sensor 111 matches (i.e. the size of inner cavity and the outer dimension of sensor is of substantially equal), temperature/pressure sensor 111 It is embedded in the lumen, axial one end and the end plates 121 of temperature/pressure sensor 111 abut against.

Adapter 112 has the binding face 112a to fit with the end plates 121 of watchcase 12, offers on binding face 112a Tapped blind hole 112b, end plates 121 offer through-hole, adapter 112 and watchcase at position corresponding with tapped blind hole 112b Between 12 end plates 121 by across the through-hole and screw in the assembly bolt 31 in the tapped blind hole 112b connection.

Cable-through hole 121a is also provided on end plates 121, the signal wire 111a of temperature/pressure sensor 111 passes through cable-through hole 121a It penetrates into inside watchcase 12, to be electrically connected with transmitter mainboard 16.

It is connected between the axial other end of temperature/pressure sensor 111 and the bottom wall of inner cavity by third sealing ring 23, to prevent Gas to be detected leaks into inside outside air or watchcase 12.The extending direction for assembling bolt 31 is parallel with axial direction, is screwing dress When with bolt 31, end plates 121 press temperature/pressure sensor 111, and temperature/pressure sensor 111 presses third sealing ring 23, so as to logical Overwinding is attached together with bolt 31, is played the role of compressing third sealing ring 23, is improved the sealing effect of third sealing ring 23.

The axial middle part of 111 side of temperature/pressure sensor has annular groove, and sealing temperature and pressure sensing is provided in annular groove 4th sealing ring 24 of 111 side of device and intracavity sidewall；Inner cavity has opening towards one end of watchcase 12, and opening offers down Angle, chamfering, temperature/pressure sensor 111, first end 12a the toroidal cavity that surrounds of 121 three of end plates in be provided with the 5th sealing Circle 25.Chamfering space at the ingenious annular groove being utilized on temperature/pressure sensor 111 of the present embodiment and lumen openings, setting It is multiple-sealed, it can effectively ensure that sealing effect.

In addition, the 6th sealing ring 26 is provided between binding face 112a and the end plates 121 of first end 12a, the 6th sealing Circle 26 is located at the radial outside of tapped blind hole 112b, so that the 6th sealing ring 26 has larger specification, further increases Sealing effect.In addition, the 6th sealing ring 26 may also function as due to having flexibility to the manufacture corrected effect of rigging error.

In the present embodiment, watchcase 12 includes the pressing ring 32 being arranged on 121 inner surface of end plates, and assembly bolt 31 is successively worn Pressing ring 32, end plates 121 are crossed to screw with tapped blind hole 112b；Further, mounting bracket 13 can pressed by threaded engagement On circle 32, to realize being indirectly connected between 13 and end plates 121 between installation.In the present embodiment, pass through 32 conduct of pressing ring Relay structure realizes the connection between multiple components, advantage are as follows: one, pressing ring 32 has regular texture, and it is easy to process, hold It is easy to get to higher manufacture and assembly precision；Two, pressing ring 32 can connect multiple components simultaneously, advantageously allow entirely to monitor dress It is compact to set 1.

With reference to Fig. 2 a and Fig. 2 b, monitoring device 1 provided in this embodiment can also integrated relay mainboard 18, relay mainboard 18 are electrically connected with transmitter mainboard 16, and signal transmitting can be carried out between transmitter mainboard 16.Relay mainboard 18 can according to The density value of detection gas issues on-off model, for example, relay issues when the density value of SF6 gas is less than setting value One on-off model detects whether SF6 occurs gas leakage situation in time to warn to staff.Relay mainboard 18 Positioned at transmitter mainboard 16 towards the side of second end 12b, i.e., transmitter mainboard 16, relay mainboard 18 along first direction successively Setting.Third threaded hole 181 is provided on relay mainboard 18, third threaded hole 181 has equal with the second threaded hole 161 Diameter, and it is axially aligned with the second threaded hole 161, so that passing through screw thread between relay mainboard 18 and transmitter mainboard 16 Connection.

In the present embodiment, relay mainboard 18 leads to stud 182 by the second single head with transmitter mainboard 16 and connect.Second is single Logical stud 182 screws simultaneously with the first threaded hole 13a, the second threaded hole 161, and transmitter mainboard 16 is fixed on mounting plate On 132.The head that second single head leads to stud 182 is connected on relay mainboard 18, and specifically, the second single head leads to stud 182 Head is connected to relay mainboard 18 towards on the side of transmitter mainboard 16, and relay mainboard 18 passes through third threaded hole 181 In bolt and the second single head lead to stud 182 head internal screw thread screw, thus be connected to the second single head lead to stud 182, and It is indirectly connected to transmitter mainboard 16.Monitoring device 1 provided in this embodiment, between relay mainboard 18 and transmitter mainboard 16 Distance at least equal to the second single head lead to stud 182 head length, be conducive to the surface radiating of each mainboard.

With reference to Fig. 3 a and Fig. 3 b, monitoring device 1 provided in this embodiment can also integrated display 19, at this point, the cover 15 End face has peephole 15a, and display 19 can externally show the density value of gas to be detected by peephole, so as to staff Real-time density value of the convenient reading to gas to be detected.

The maximum outside diameter of display 19 is equal with the internal diameter of the cover 15, so that the first external screw thread 122 and the first internal screw thread During 151 screw, the screw thread end face 122a of the first external screw thread 122 can push a certain end face of display 19, thus will display Device 19 is pressed together on the bottom wall of the cover 15 (similar to the principle of the first sealing ring of pressing 21 described above), to realize watchcase 12, the fixation between the cover 15, display 19.

In the present embodiment, the first sealing ring is provided between the screw thread end face 122a of display 19 and the first external screw thread 122 21, it, can be simultaneously by the first sealing ring 21 and display 19 in the first external screw thread 122 and during screwing of the first internal screw thread 151 It is pressed together on the bottom wall of the cover 15, to simplify structure setting and assembling process.

Specifically, display 19 includes along the sequentially connected display main board 191 of first direction, panel 192 and panel Pad pasting 193, display main board 191, panel 192 and panel pad pasting 193, which pass through while penetrating through the threaded fastener of three, to be connected, with Form an entirety.Display main board 191 is electrically connected with transmitter mainboard 16, is the core component of display 19, including is used for Show the liquid crystal display of gas density value to be detected.Specifically, being electrically connected between display main board 191 and transmitter mainboard 16 Connecing, which can be, is directly connected to, and is also possible to be indirectly connected with (for example, connecting by relay mainboard 18), can be according to the convenience of winding displacement Property is selected.Panel 192 is support and the installing component of display 19, has the outer diameter equal with 15 internal diameter of the cover, the Display 19 is pressed together in the cover 15 by the screw thread end face 122a of one external screw thread 122 by pressing panel 192.Panel pad pasting 193 It is set to the outermost of display 19, protective action can be played to liquid crystal display.

With reference to Fig. 4 a and Fig. 4 b, in the present embodiment, monitoring device 1 is integrated with transmitter mainboard 16, relay mainboard simultaneously 18 and display 19, wherein transmitter mainboard 16 is electrically connected with relay mainboard 18, relay mainboard 18 and display main board 191 electrical connections.The mounting means of transmitter mainboard 16 can refer to structure shown in Fig. 2 a and Fig. 2 b, the mounting means of display 19 It can refer to mode shown in Fig. 3 a and Fig. 3 b.

In the case where monitoring device 1 is integrated with compared with multifunction module, need to installation space shown in Fig. 1 a and Fig. 1 b Carry out dilatation.The mode that the present embodiment is taken is to increase switching the cover 33, i.e. watchcase 12 is connected by switching the cover 33 and the cover 15 It connects.That is, watchcase 12 is connected through a screw thread with switching the cover 33, switching the cover 33 is connected through a screw thread with the cover 15, is specifically connected The mode of connecing continues the connection type of watchcase 12 and the cover 15 in Fig. 1 a and Fig. 1 b.The left side for the cover 33 of transferring has external screw thread, with It is screwed convenient for the first internal screw thread 151 of the cover 15；Transfer the cover 33 right side have internal screw thread (the second internal screw thread 331), with First external screw thread 122 of watchcase 12 is screwed.

In the present embodiment, the second sealing ring 22, the peace of the second internal screw thread 331 are provided between watchcase 12 and switching the cover 33 Dress mode is similar with the first internal screw thread 151, specifically: annular ridge, annular ridge position are provided on the inner wall of switching the cover 33 In the second internal screw thread 331 along the downstream of first direction, during the first external screw thread 122 and the second internal screw thread 331 screw, the Second sealing ring 22 is pressed on annular ridge by the screw thread end face 122a of one external screw thread 122, to realize watchcase 12 and adapter jacket Sealing between lid 33.

May also set up sealing ring between switching the cover 33 and the cover 15, specific set-up mode can refer in Fig. 1 a and Fig. 1 b, Connection type between the second end 12b and the cover 15 of watchcase 12, repeats no more.

In addition, 485 remote-transmission modules are provided on transmitter mainboard 16, to realize the telecommunication of monitoring device 1.

In conclusion the present embodiment each section all uses standardized Detachable connection structure, it is convenient to realize function Extension between module with delete, to meet the diversity requirement of client.For example, when client wish all data all remotely into When row processing, structure shown in Fig. 1 a and Fig. 1 b may be selected；When client wishes to obtain warning signal in time, may be selected in Fig. 1 a With expansion relay mainboard 18, the i.e. structure of Fig. 2 a and Fig. 2 b on the basis of Fig. 1 b；When client wish monitoring device 1 is local can When conveniently knowing the real-time density value of gas to be detected, it may be selected to expand display 19 on the basis of Fig. 1 a and Fig. 1 b, that is, scheme The structure of 3a and Fig. 3 b；When client wish monitoring modular function it is more comprehensive when, monitoring device 1 can be extended to can Fig. 4 a and Structure shown in Fig. 4 b.

Preferably, in the present embodiment each threaded fastener (including bolt, single head lead to stud etc.) all may be configured as it is identical Screw thread model further increases the interchangeability between each components and the convenience of assembly.

In conclusion the principles of the present invention and its function is only illustrated in above-described embodiment provided by the utility model Effect, rather than limits the present invention.Any person skilled in the art all can without prejudice to the utility model spirit and Under the scope of, it carries out modifications and changes to above-described embodiment.Therefore, those of ordinary skill in the art is not taking off such as All equivalent modifications or change completed under spirit revealed from the utility model and technical idea, should be practical new by this The claim of type is covered.

Claims (19)

1. a kind of gas density detecting device characterized by comprising

Test section, including adapter and the temperature/pressure sensor being arranged in inside the adapter, the adapter can with it is to be checked Survey gas connection；

Watchcase has axial upper first end and second end, and the watchcase is that the second end is provided with the tubular structure of opening, The test section is mounted on outside the watchcase by the end plates of the first end；

Mounting bracket is arranged in the watchcase and connect with the end plates, the first screw thread is provided in the mounting bracket Hole；

Transmitter mainboard is electrically connected with the temperature/pressure sensor, and the mounting bracket and the transmitter mainboard are along first direction It is sequentially connected, the first direction is direction parallel and that the second end is directed toward from the first end with the axial direction；It is described Transmitter mainboard has and the first threaded hole equal diameter and the second spiral shell for axially aligning described in first threaded hole Pit, so that the transmitter mainboard is connected through a screw thread with the mounting bracket；

The cover is detachably connected with the second end of the watchcase, to close the opening；

The outside of the watchcase is arranged in cable, is electrically connected with the transmitter mainboard.

2. gas density detecting device according to claim 1, which is characterized in that the mounting bracket includes along described Sequentially connected first single head in one direction leads to stud and mounting plate, and first single head leads to the threaded shank of stud and the watchcase revolves It closes；

The head that first single head leads to stud is connected on the mounting plate, and counterbore, the peace are provided on the mounting plate Loading board is screwed by the head that the bolt in the counterbore leads to stud with first single head.

3. gas density detecting device according to claim 1, which is characterized in that further include and the transmitter mainboard electricity The relay mainboard of connection, the relay mainboard are located at the transmitter mainboard along the downstream of the first direction, it is described after Mainboard has and the second threaded hole equal diameter and the third screw thread axially aligned described in second threaded hole Hole, so that the relay mainboard is mechanically connected with the transmitter mainboard by screw thread.

4. gas density detecting device according to claim 3, which is characterized in that the relay mainboard and the pick-up Device mainboard leads to Stud connection by the second single head, and second single head leads to threaded shank and first threaded hole, described of stud Second threaded hole screws simultaneously；

The head that second single head leads to stud is connected to the relay mainboard towards on the side of the transmitter mainboard, institute Relay mainboard is stated to screw by the head that the bolt in the third threaded hole leads to stud with second single head.

5. gas density detecting device according to claim 1, which is characterized in that lead between the watchcase and the cover Cross threaded connection, wherein there is the first external screw thread on the watchcase, there is the first internal screw thread in the cover；

The first sealing ring is provided between the watchcase and the cover, in first external screw thread and first internal screw thread During screwing, first sealing ring can be pressed on to the bottom wall of the cover by the described first externally threaded screw thread end face On.

6. gas density detecting device according to claim 5, which is characterized in that the outer peripheral surface of first sealing ring is Step shaft-like, the small diameter portion of the outer peripheral surface are bonded with the inner surface of the watchcase, the large-diameter portion of the outer peripheral surface and the cover The inner surface of lid is bonded.

7. gas density detecting device according to claim 5, which is characterized in that the end face of the cover has observation Hole, the monitoring device further include display, and the display is used to externally show gas to be detected by the peephole Density value；

The maximum outside diameter of the display is equal with the internal diameter of the cover, in first external screw thread and first internal screw thread Screw during, the display can be pressed together on to the bottom wall of the cover by the described first externally threaded screw thread end face On.

8. gas density detecting device according to claim 7, which is characterized in that the display and the described first outer spiral shell It is additionally provided with the first sealing ring between the screw thread end face of line, screws process in first external screw thread and first internal screw thread In, first sealing ring and the display can be pressed together on the bottom wall of the cover simultaneously.

9. gas density detecting device according to claim 7, which is characterized in that the display includes along first direction Sequentially connected display main board, panel and panel pad pasting, by penetrating through the threaded fastener company of three simultaneously between three It connects；Wherein, display main board is electrically connected with the transmitter mainboard；

The display is pressed together in the cover by the first externally threaded screw thread end face by pressing the panel.

10. gas density detecting device according to claim 5, which is characterized in that the watchcase by switching the cover with The cover is connected, and the axial ends of the switching the cover is provided with opening；

It is connected through a screw thread between the watchcase and the switching the cover, between the switching the cover and the cover；

The monitoring device includes the relay mainboard being electrically connected with the transmitter mainboard, and electric with the relay mainboard The display main board of connection.

11. gas density detecting device according to claim 10, which is characterized in that the switching the cover is close to the table One end of shell has the second internal screw thread, is provided with annular ridge on the inner wall of the switching the cover, the annular ridge is located at institute The second internal screw thread is stated along the downstream of the first direction；

It is provided with the second sealing ring between the watchcase and the switching the cover, the spiral shell in first external screw thread and described second During the screwing of line, second sealing ring can be pressed on the convex annular by the described first externally threaded screw thread end face On rib.

12. gas density detecting device according to claim 1, which is characterized in that the adapter is internally provided with edge The axially extending inner cavity, the size of the inner cavity and the shape of the temperature/pressure sensor match, so that the temperature and pressure Sensor is embedded in the inner cavity, and axial one end of the temperature/pressure sensor is abutted with the end plates；

The adapter has the binding face to fit with the end plates of the watchcase, and it is blind to offer screw thread on the binding face Hole is bolted between the adapter and the end plates of the watchcase by screwing in the assembly of the tapped blind hole；

The signal wire of the temperature/pressure sensor is penetrated into inside the watchcase by the cable-through hole being provided on the end plates.

13. gas density detecting device according to claim 12, which is characterized in that the axial direction of the temperature/pressure sensor is another It is connected between one end and the bottom wall of the inner cavity by third sealing ring, the extending direction of the assembly bolt and the axial direction are flat Row can compress the third sealing ring by the temperature/pressure sensor when screwing the assembly bolt.

14. gas density detecting device according to claim 13, which is characterized in that

The axial middle part of the temperature/pressure sensor side has annular groove, and the sealing temperature and pressure are provided in the annular groove 4th sealing ring of sensors sides and the intracavity sidewall；

The inner cavity has opening towards one end of the watchcase, and the opening offers chamfering, the chamfering, the temperature and pressure Sensor, the first end the toroidal cavity that surrounds of end plates three in be provided with the 5th sealing ring.

15. gas density detecting device according to claim 13, which is characterized in that the binding face and the end plates Between be provided with the 6th sealing ring, the 6th sealing ring is located at the radial outside of the tapped blind hole.

16. gas density detecting device according to claim 12, which is characterized in that the watchcase includes being arranged described Pressing ring on end plates inner surface, pressing ring, the end plates described in the assembly screw bolt passes with the tapped blind hole It screws；It is connected through a screw thread between the mounting bracket and the pressing ring.

17. gas density detecting device according to claim 1, which is characterized in that the transmitter mainboard is remote with 485 Transmission module.

18. gas density detecting device according to claim 1, which is characterized in that the gas to be detected is SF6 gas Body.

19. gas density detecting device according to claim 1, which is characterized in that the watchcase by switching the cover with The cover is connected, and the axial ends of the switching the cover is provided with opening；

It is connected through a screw thread between the watchcase and the switching the cover, between the switching the cover and the cover；

The monitoring device includes the relay mainboard being electrically connected with the transmitter mainboard, and electric with the relay mainboard The display main board of connection.