CN202886309U - Gas sensor - Google Patents
Gas sensor Download PDFInfo
- Publication number
- CN202886309U CN202886309U CN 201220520099 CN201220520099U CN202886309U CN 202886309 U CN202886309 U CN 202886309U CN 201220520099 CN201220520099 CN 201220520099 CN 201220520099 U CN201220520099 U CN 201220520099U CN 202886309 U CN202886309 U CN 202886309U
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- CN
- China
- Prior art keywords
- sleeve
- cock body
- ceramic head
- shrink ring
- fixing shrink
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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 - Fee Related
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- Measuring Oxygen Concentration In Cells (AREA)
Abstract
The utility model discloses a gas sensor. A body is assembled with a screwing piece and a main plug body located inside the screwing piece; the main plug extends out forwards to be provided with a sensing ceramic head and extends out backwards to be provided with a rear plug body; the front end of the screwing piece is assembled with a front sleeve which is wound around the periphery of the sensing ceramic head, and the rear end of the screwing piece is assembled with a rear sleeve which is wound around the periphery of the rear plug body; a fixing ring sleeve is arranged between a first rear end wall of the inner side face of the rear sleeve and the rear plug body; a ventilated film sleeve is tightly arranged between the inner side face of the rear sleeve and the outer side face of the fixing ring sleeve; and a plurality of third and fourth air vents which correspond to one another from inside to outside are respectively arranged along the radial direction of the side faces of the rear sleeve and the fixing ring sleeve. Therefore, the ventilated film sleeve prevents external water from invading and avoids interfering telecommunication, so that air sequentially enters from the rear sleeve, the ventilated film sleeve and the fixing ring sleeve and is contacted with the sensing ceramic head by passing through the inner parts of the rear plug body and the main plug body; and waste gas is contacted with the front section of the sensing ceramic head through the air vents of the front sleeve so as to rapidly detect the oxygen content of the waste gas.
Description
Technical field
The utility model relates to a kind of gas perceptron, relates in particular to a kind of gas perceptron for detecting vehicle waste gas oxygen level or air-fuel ratio perceptron.
Background technology
The used Lambda sensor of general vehicle is to be located in the gas outlet, is used for the oxygen level of detecting discharging waste gas, and the voltage signal after institute detected transfers to vehicle control device, in order to air and the fuel ratio of controlling vehicle, makes the combustion rate raising.
At present, the body group of Lambda sensor commonly used is provided with spiro connecting piece and is located at the main cock body of its inside, be provided with the sensing ceramic head and the inside and outside electrode that stretch out forward in main cock body, and main cock body is extended with rear cock body backwards; Spiro connecting piece front end winding one is surrounded on the anterior cannula of sensing ceramic head, and its rear end is socketed with rear sleeve, ventilated membrane and air inlet sleeve in rear cock body periphery, therefore, stop extraneous water liquid to be invaded by ventilated membrane, atmosphere is entered in the rear sleeve via air inlet sleeve, ventilated membrane, come the contact sensing ceramic head via rear cock body and main cock body inside again, the air hole that waste gas then enters anterior cannula comes touch monitoring ceramic head leading portion, for the oxygen level of detecting perception waste gas.
But when above-mentioned Lambda sensor commonly used was arranged at the back segment outer peripheral face of rear sleeve with ventilated membrane and air inlet sleeve, it is outside each other can to form socket ora terminalis position, thereby has influence on waterproof effect.In addition, the rear sleeve of above-mentioned Lambda sensor commonly used must be made as five-part form class body, and utilizes the metal system of taking out or extruding metal moulding, so that the cost of rear sleeve increases considerably.
Summary of the invention
In order to overcome defects, the utility model provides a kind of gas perceptron, this gas perceptron directly makes up ventilated membrane and Fixing shrink ring between rear sleeve inside and rear cock body, can reach good waterproof and ventilative effect, more firm and durable, and the cost of reduction rear sleeve and associated components.
The utility model for the technical scheme that solves its technical matters and adopt is: a kind of gas perceptron, comprise the body group, this body group arranges a spiro connecting piece and is positioned at the main cock body of this spiro connecting piece inside, this main cock body stretches out forward and is provided with the sensing ceramic head, and this main cock body stretches out backwards and is provided with rear cock body; The anterior cannula with described sensing ceramic head periphery is surrounded in described spiro connecting piece front end winding one, and its rear end winding one is placed on the rear sleeve of described rear cock body periphery; It is characterized in that: between the first aft bulkhead of the medial surface of described rear sleeve and rear cock body opposite end, be provided with Fixing shrink ring, and driving fit arranges a ventilative Membrane cover between this rear sleeve medial surface and Fixing shrink ring lateral surface; Described rear sleeve radially is respectively equipped with a plurality of each other inside and outside corresponding the 3rd air hole and four-way pores with Fixing shrink ring along its side.
As further improvement of the utility model, be provided with first passage in the described main cock body, be provided with second channel and the first through hole in the described rear cock body, be provided with the second through hole in the described Fixing shrink ring, this first passage, second channel, the first through hole and the second through hole are respectively equipped with each other and axially are communicated with.
As further improvement of the utility model, described rear sleeve radially be provided with respectively in its plural number the 3rd air hole both sides one in it side-prominent fixedly circular groove.
As further improvement of the utility model, described Fixing shrink ring is provided with a lordosis acies against the opposite end of described rear cock body, and this Fixing shrink ring also is provided with the first rear wall end that one second rear wall end is resisted against described rear sleeve.
As further improvement of the utility model, described ventilative Membrane cover front end is resisted against the lordosis acies of described Fixing shrink ring, and this ventilative Membrane cover rear end is resisted against the second rear wall end of described rear sleeve.
As further improvement of the utility model, described sensing ceramic head is the hollow cone body.
As further improvement of the utility model, described sensing ceramic head is platysome.
The beneficial effects of the utility model are: this gas perceptron is by arranging a Fixing shrink ring between the rear sleeve medial surface of gas perceptron and its first aft bulkhead and rear cock body opposite end, and driving fit arranges a ventilative Membrane cover between rear sleeve medial surface and Fixing shrink ring lateral surface, this rear sleeve and Fixing shrink ring radially are provided with a plurality of each other the inside and outside the corresponding the 3rd along the side simultaneously, the four-way pore, thereby stop the invasion of extraneous water liquid by ventilative Membrane cover, and avoid interference telecommunication, make atmosphere sequentially via the air hole of rear sleeve, the wall thickness of ventilative Membrane cover, the air hole of Fixing shrink ring enters, again via rear cock body and main cock body inside with the touch monitoring ceramic head, waste gas then passes through the air hole contact sensing ceramic head leading portion of anterior cannula, with the oxygen level of rapid detecting perception waste gas.
Description of drawings
Fig. 1 is the described gas perceptron of the utility model the first preferred embodiment perspective view;
Fig. 2 is Fig. 1 cross-sectional view;
Fig. 3 is the three-dimensional exploded view of Fig. 1 back segment associated components;
Fig. 4 is another visual angle three-dimensional exploded view of Fig. 1 back segment associated components;
Fig. 5 is the cut-open view before the gas perceptron back segment associated components integrated positioning among Fig. 2;
Fig. 6 is the cut-open view during gas perceptron back segment associated components integrated positioning among Fig. 2;
Fig. 7 is gas perceptron cross section enlarged drawing among Fig. 6;
Fig. 8 is the described gas perceptron of the utility model the second preferred embodiment perspective view.
By reference to the accompanying drawings, make the following instructions:
1---body group 2---sensing ceramic head
3---anterior cannula 4---rear sleeve
5---Fixing shrink rings 6---Membrane cover of breathing freely
7---heating rod 8---waterproof plug
11---spiro connecting pieces 23---the first wire
The rear cock body of 12---main cock bodys 13---
14---front plug 15---first passage
16---second channels 17---the first through hole
31---inner sleeves 32---the first air hole
33---second air holes 42---the first aft bulkhead
43---the 3rd air hole 53---four-way pore
54---third channels 41---the second through hole
71---second wires 52---the second aft bulkhead
51---lordosis acies 44---are circular groove fixedly
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
At first, see also accompanying drawing 1-5, the first preferred embodiment for gas perceptron described in the utility model, as shown in FIG., the gas perceptron is by body group 1, sensing ceramic head 2, anterior cannula 3, rear sleeve 4, Fixing shrink ring 5, the members such as ventilative Membrane cover 6 and heating rod 7 form, wherein: the body group 1 of gas perceptron is provided with spiro connecting piece 11 and is positioned at the porcelain master cock body 12 of this spiro connecting piece inside, plug 14 is provided with the sensing ceramic head 2 that stretches out forward before main cock body 12 front ends cooperate, and electrode 21 and external electrode 22 in connecting, cock body 13 after main cock body 12 rear ends are extended with backwards, and main cock body 12 is provided with the first passage 15 that is interconnected with rear cock body 13 inside, second channel 16 and the first through hole 17.Be connected to the anterior cannula 3 that is surrounded on outside the sensing ceramic head 2 in spiro connecting piece 11 front group, and be interval with a plurality of the first air holes 32 on the anterior cannula 3, be interval with a plurality of the second air holes 33 on the inner sleeve 31 of this anterior cannula, this first air hole and the second air hole interval arrange, and there is the rear sleeve 4 that is placed on rear cock body 13 peripheries spiro connecting piece 11 rear ends then winding.As shown in FIG., sensing ceramic head 2 is made as the hollow cone body, calandria 7 is inserted in the first passage 15 and second channel 16 and sensing ceramic head 2 of main cock body 12 and rear cock body 13.
Consult accompanying drawing 1-7, the main innovate point of the gas perceptron of the present embodiment is, be provided with Fixing shrink ring 5 between the opposite end of the interior rear cock body 13 of rear sleeve 4, and driving fit arranges the ventilative Membrane cover 6 of water proof type between the first aft bulkhead 42 of rear sleeve 4 medial surfaces and Fixing shrink ring 5 lateral surfaces, and rear sleeve 4 radially is provided with respectively a plurality of each other inside and outside the 3rd corresponding air hole 43 and four-way pores 53 with Fixing shrink ring 5 along its side, can stop extraneous water liquid to be invaded by ventilative Membrane cover 6, and make atmosphere can be sequentially via the 3rd air hole 43 of rear sleeve 4, the wall thickness of ventilative Membrane cover 6 own, four-way pore 53 and the third channel 54(of Fixing shrink ring 5 consult accompanying drawing 6), to enter in rear cock body 13 and main cock body 12 inner the first through holes 17 and first passage 15 and second channel 16 that link to each other.
The main cock body 12 of above-mentioned gas perceptron, rear cock body 13 and Fixing shrink ring 5 axially communicate with first passage 15, second channel 16 and third channel 54 each other, and the rear wall end 42 of rear sleeve 4 is provided with the second through hole 41 that axially communicates with first passage 15, second channel 16 and third channel 54, and the inner riveted of this rear sleeve has waterproof plug 8, the first wire 23 of interior electrode 22, external electrode 22 and the second wire 71 of heating rod are stretched out, to connect external power source outwardly via reaching waterproof plugs 8 in the Fixing shrink ring 5.In the present embodiment, Fixing shrink ring 5 is provided with a lordosis acies 51 with the opposite end against rear cock body 13, and Fixing shrink ring 5 also is provided with one second aft bulkhead 52 with relative the first aft bulkhead 42 against rear sleeve 4, with it simultaneously, ventilative Membrane cover 6 front ends are resisted against the lordosis acies 51 of retaining collar 5, ventilative Membrane cover 6 rear ends then are resisted against the first rear wall end 42 location of rear sleeve 4, then each radially is provided with fixedly circular groove 44 side-prominent in it in plural number the 3rd air hole 43 both sides of rear sleeve 4, with better fixed ventilation Membrane cover 6, can reach good waterproof and airing function, more firm and durable, and the cost of reduction rear sleeve 4 and associated components.
This gas perceptron is when work, such as accompanying drawing 2,6, shown in 7, heating rod 7 begins heating, make sensing ceramic head 2 reach working temperature, and the 3rd air hole 43 of the rear sleeve 4 of body group 1 and Fixing shrink ring 5 and four-way pore 53 are by waterproof and the permeation functions of ventilative Membrane cover 6, can stop extraneous water liquid to be invaded and cause electric short circuit, and avoid interference telecommunication, ambient atmosphere is then sequentially via the 3rd bleeder vent of rear sleeve 4, the wall thickness of ventilative Membrane cover 6 own, the 4th bleeder vent 53 of Fixing shrink ring 5 enters, again via first through hole 17 and first passage 15 of rear cock body 13 and main cock body 12 inside, second channel 16 flows, relative inner position with contact sensing ceramic head 2, on the other hand, waste gas to be measured is then via the first air hole 32 of anterior cannula 3 and inner sleeve 31, the second air hole 33 enters, and sensing ceramic head 2 utilizes the catalysis of interior electrode 21 and external electrode 22, make inboard atmosphere and outside waste gas form partial pressure of oxygen poor, oxonium ion produces electromotive force when flowing from the inside to the outside, by the oxygen level of the rapid perception waste gas of this voltage swing.
In sum, gas perceptron described in the utility model can solve the familiar lacunas of prior art, reaches good waterproof and ventilative effect, firm and durable more, and reduce the cost of rear sleeve 4 and associated components.
Above-mentioned specific embodiment only is two preferred embodiments of the present utility model, and protection domain of the present utility model is not limited to this, and simple modification or the replacement done according to essentiality content of the present utility model on the contrary all will fall within the protection domain of the present utility model.
Claims (7)
1. a gas perceptron comprises the body group, and this body group arranges a spiro connecting piece and is positioned at the main cock body of this spiro connecting piece inside, and this main cock body stretches out forward and is provided with the sensing ceramic head, and this main cock body stretches out backwards and is provided with rear cock body; The anterior cannula with described sensing ceramic head periphery is surrounded in described spiro connecting piece front end winding one, and its rear end winding one is placed on the rear sleeve of described rear cock body periphery; It is characterized in that: between the first aft bulkhead of the medial surface of described rear sleeve and rear cock body opposite end, be provided with Fixing shrink ring, and driving fit arranges a ventilative Membrane cover between this rear sleeve medial surface and Fixing shrink ring lateral surface; Described rear sleeve radially is respectively equipped with a plurality of each other inside and outside corresponding the 3rd air hole and four-way pores with Fixing shrink ring along its side.
2. gas perceptron according to claim 1, it is characterized in that: be provided with first passage in the described main cock body, be provided with second channel and the first through hole in the described rear cock body, be provided with the second through hole in the described Fixing shrink ring, this first passage, second channel, the first through hole and the second through hole are respectively equipped with each other and axially are communicated with.
3. gas perceptron according to claim 1 is characterized in that: described rear sleeve radially be provided with respectively in its plural number the 3rd air hole both sides one in it side-prominent fixedly circular groove.
4. gas perceptron according to claim 1 and 2, it is characterized in that: described Fixing shrink ring is provided with a lordosis acies against the opposite end of described rear cock body, and this Fixing shrink ring also is provided with the first rear wall end that one second rear wall end is resisted against described rear sleeve.
5. gas perceptron according to claim 4, it is characterized in that: described ventilative Membrane cover front end is resisted against the lordosis acies of described Fixing shrink ring, and this ventilative Membrane cover rear end is resisted against the second rear wall end of described rear sleeve.
6. gas perceptron according to claim 1, it is characterized in that: described sensing ceramic head is the hollow cone body.
7. gas perceptron according to claim 1, it is characterized in that: described sensing ceramic head is platysome.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220520099 CN202886309U (en) | 2012-10-12 | 2012-10-12 | Gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220520099 CN202886309U (en) | 2012-10-12 | 2012-10-12 | Gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886309U true CN202886309U (en) | 2013-04-17 |
Family
ID=48077723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220520099 Expired - Fee Related CN202886309U (en) | 2012-10-12 | 2012-10-12 | Gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202886309U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108614070A (en) * | 2016-12-12 | 2018-10-02 | 毅泰成科技股份有限公司 | Gas concentration analysis system |
-
2012
- 2012-10-12 CN CN 201220520099 patent/CN202886309U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108614070A (en) * | 2016-12-12 | 2018-10-02 | 毅泰成科技股份有限公司 | Gas concentration analysis system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20171012 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |