CN102200461A - Liquid level transmitter - Google Patents

Liquid level transmitter Download PDF

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Publication number
CN102200461A
CN102200461A CN2011100532419A CN201110053241A CN102200461A CN 102200461 A CN102200461 A CN 102200461A CN 2011100532419 A CN2011100532419 A CN 2011100532419A CN 201110053241 A CN201110053241 A CN 201110053241A CN 102200461 A CN102200461 A CN 102200461A
Authority
CN
China
Prior art keywords
level transmitter
sealing
fluid level
diffuse
housing
Prior art date
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.)
Pending
Application number
CN2011100532419A
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Chinese (zh)
Inventor
伍正辉
龙霞
陈明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI SD-SENSOR TECHNOLOGY CO LTD
Original Assignee
SHANGHAI SD-SENSOR TECHNOLOGY CO LTD
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHANGHAI SD-SENSOR TECHNOLOGY CO LTD filed Critical SHANGHAI SD-SENSOR TECHNOLOGY CO LTD
Priority to CN2011100532419A priority Critical patent/CN102200461A/en
Publication of CN102200461A publication Critical patent/CN102200461A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a liquid level transmitter comprising a sealing body, an amplifying circuit, a circuit compensation board and a diffused silicon sensitive element; the amplifying circuit is connected to a lead extending out of a shell; the diffused silicon sensitive element is fixedly arranged in the shell; the sealing body comprises the shell, a tapered upper cover, a card sleeve sealing part, a pipe connecting nozzle and a detachable end cover; the tapered upper cover is fixedly connected with one side of the shell and comprises a tapered end; the card sleeve sealing part is connected with the tapered end in a sealing manner; one end of the lead is penetrated in the card sleeve sealing part and extends out of the sealing body; the diffused silicon sensitive element is embedded in the pipe connecting nozzle; and the detachable end cover is connected with the pipe connecting nozzle. Due to the adoption of the liquid level transmitter disclosed by the invention, card sleeve sealing is adopted at a lead outlet, therefore, safety and reliability in sealing, strong use and operation performance and convenience in installation are achieved. In addition, the detachable end cover is connected with the pipe connecting nozzle and is convenient to dismount, and a lot of time can be saved during maintenance and operation.

Description

Fluid level transmitter
Technical field
The present invention relates to a kind of liquid level proving installation, particularly a kind of fluid level transmitter.
Background technology
Fluid level transmitter is liquid level gauge again, is a kind of pressure transducer of measuring liquid level.It is based on the proportional principle of height of the fluid pressure of surveying and this liquid, promptly adopt diffuse si sensitive element or ceramic condenser presser sensor sensor, static pressure is converted to electric signal, through temperature compensation and linear the correction, change into the standard electric signal again.Fluid level transmitter is widely used in the level gauging of the various media of systems such as petrochemical complex, metallurgy, electric power, pharmacy, water supply and sewage, environmental protection and industry.
Yet existing fluid level transmitter complex structure usually, is the sealing of being made up of a line ball nut and an O-ring seal by two groups in the sealing of lead outlet part, through twice press seal realization.Therefore, during assembling, existing fluid level transmitter is very high to the accuracy requirement of right alignment, operates very time-consuming.And, in case same eccentric shaft the time takes place in assembling, then very easily produce dislocation.Then can little leakage occur during use, reduce the qualification rate of product at diffuse si sensitive element place.
In addition, the diffuse si sensitive element in the existing fluid level transmitter is installed in the seal body of fluid level transmitter by a pressure inlet.Because diffuse si sensitive element and pressure inlet be for fixedlying connected, when product breaks down when needing test, can't take away pressure inlet the diffuse si sensitive element is observed, so this overhaul when just making existing fluid level transmitter debugging very inconvenient.
Summary of the invention
Technical matters to be solved by this invention is that the defective of sealing difference provides a kind of fluid level transmitter that convenient and good sealing effect are installed for the fluid level transmitter that overcomes prior art exists assembling loaded down with trivial details.
The present invention solves above-mentioned technical matters by following technical proposals: a kind of fluid level transmitter, it comprises: a seal body, and place an amplifying circuit, a circuit compensation plate and a diffuse si sensitive element in the described seal body, wherein, described amplifying circuit connects a lead, and described lead stretches out outside the described housing, and described diffuse si sensitive element is fixedly arranged in the described housing, its characteristics are that described seal body comprises:
One housing;
One with the affixed taper loam cake of described housing one side, described taper loam cake comprises an awl end;
The one cutting ferrule sealing that is tightly connected with the awl end of described taper loam cake, an end of described lead is arranged in described cutting ferrule sealing and stretches out outside the described seal body;
One with the affixed pressure inlet of described housing opposite side, described diffuse si sensitive element is embedded in the described pressure inlet;
The one detachable end cap that is connected with described pressure inlet.
Preferably, described diffuse si sensitive element is a diffuse si core body.
Preferably, described cutting ferrule sealing comprises:
One is embedded at the O-ring seal in the described awl end;
Be embedded in the described awl end and coat the cutting ferrule of described O-ring seal; And
One is located at the outer gland nut of described cutting ferrule, and described gland nut coats described awl end.
Preferably, described pressure inlet comprises one first groove and one second groove, and described diffuse si core body is embedded in described first groove, and described detachable end cap is embedded in described second groove.
Preferably, the inwall of described second groove is provided with internal thread.
Preferably, described detachable end cap is provided with and the corresponding male connection of described internal thread.
Preferably, also be provided with a dividing busing in the described housing.
Among the present invention, but above-mentioned optimum condition combination in any on the basis that meets this area general knowledge promptly gets the preferred embodiments of the invention.
Positive progressive effect of the present invention is:
1, the cutting ferrule sealing is adopted in outlet of the present invention, and sealingly secure, reliable uses strong operability, and is easy for installation.
2, the present invention adopts detachable end cap to be connected with pressure inlet, not only when inspection operation, can save the plenty of time, and also good airproof performance, the dependability height.
3, the present invention also is equipped with a dividing busing, the high temperature in the time of can avoiding welding like this in housing.
Description of drawings
Fig. 1 is the structure semisectional view of the fluid level transmitter of preferred embodiment of the present invention.
Fig. 2 is the three-dimensional exploded view of the fluid level transmitter of preferred embodiment of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As depicted in figs. 1 and 2, the seal body of fluid level transmitter of the present invention by a housing 6, one and the taper loam cake that is tightly connected of an end of housing 65, one and affixed cutting ferrule sealing, a pressure inlet 10, the detachable end cap 11 of taper loam cake 5 form.
Wherein, taper loam cake 5 comprises an awl end, and the awl end of cutting ferrule sealing and taper loam cake 5 is tightly connected, and lead 1 passes outside the housing 6 that the cutting ferrule sealing stretches out seal body.
The seal body of fluid level transmitter of the present invention is built-in with a circuit compensation plate 9, and a circuit compensation plate 9 and a diffuse si sensitive element 12 are electrically connected such as a diffuse si core body.Circuit compensation plate 9 is electrically connected with a magnification circuit plate 8 simultaneously.Magnification circuit plate 8 connects lead 1.
Lead 1 has the outlet part of stretching out outside the housing 6.By this outlet part, can carry out the liquid level test of container.
Amplifying circuit of the present invention, circuit compensation plate portion, and diffuse si sensitive element and circuit compensation plate electrical connection section are divided into prior art, promptly, can adopt known amplifying circuit of the prior art, circuit compensation plate to be electrically connected with the diffuse si sensitive element, this part is not inventive point of the present invention place, does not give unnecessary details at this.
In order to improve safety, the reliability of fluid level transmitter sealing, the cutting ferrule sealing of outlet of the present invention adopts the nonmetal cutting ferrule sealing of combined type.Preferably, cutting ferrule sealing of the present invention comprises: a cutting ferrule 3, an O-ring seal 4 and a gland nut 2.Wherein, cutting ferrule 3 coats O-ring seal 4, and O-ring seal 4 is embedded in the awl end of taper loam cake 5, and gland nut 2 is located at outside the cutting ferrule 3 and from outside cutting ferrule 3 is coated of awl end and is compressed, thus the compacting sealing of realization outlet.
Preferably, the cutting ferrule 3 in the present embodiment can be selected the cutting ferrule of polytetrafluoroethylmaterial material for use, and O-ring seal 4 can adopt the nitrile rubber circle.And, owing to adopt the cutting ferrule sealing, only need once sealing, can reach leakproof seal effect of the prior art, therefore easy for installation, make the sealingly secure of fluid level transmitter, reliability improve greatly.
Pressure inlet 10 docks with housing 6, is provided with one first groove and one second groove in the pressure inlet 10.The diffuse si core body is embedded in first groove of pressure inlet 10, and detachable end cap 11 then is embedded in second groove of pressure inlet 10.
Preferably, for the diffuse si core body is sealed in the housing 6, the safety when guaranteeing to use is provided with internal thread in second groove.Detachable end cap 11 of the present invention can be a thread ending cover that has a male connection.The internal thread of the external thread of thread ending cover joint and second groove is suitable.
Further, being connected to of outlet part of the present invention is welded to connect.Preferably, can adopt laser bonding, therefore shorten the structure length of product greatly.This method for laser welding is not given unnecessary details at this originally as prior art.
In addition, the present invention also is equipped with a dividing busing 7, the high temperature in the time of can avoiding welding like this in housing 6.
In addition, because detachable end cap 11 is detachable being threaded with pressure inlet 10, like this, when assembling fluid level transmitter, when carrying out the maintenance debugging before the product export, in case go wrong, can back out the detachable end cap at any time, the diffuse si core body in the housing is observed, in time investigate fault.Therefore, fluid level transmitter of the present invention also is very easy to the debugging and the maintenance of fluid level transmitter.
Though more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art can make numerous variations or modification to these embodiments under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.

Claims (7)

1. fluid level transmitter, it comprises: a seal body, and place an amplifying circuit, a circuit compensation plate and a diffuse si sensitive element in the described seal body, wherein, described amplifying circuit connects a lead, and described lead stretches out outside the described housing, and described diffuse si sensitive element is fixedly arranged in the described housing, it is characterized in that described seal body comprises:
One housing;
One with the affixed taper loam cake of described housing one side, described taper loam cake comprises an awl end;
The one cutting ferrule sealing that is tightly connected with the awl end of described taper loam cake, an end of described lead is arranged in described cutting ferrule sealing and stretches out outside the described seal body;
One with the affixed pressure inlet of described housing opposite side, described diffuse si sensitive element is embedded in the described pressure inlet;
The one detachable end cap that is connected with described pressure inlet.
2. fluid level transmitter as claimed in claim 1 is characterized in that, described diffuse si sensitive element is a diffuse si core body.
3. fluid level transmitter as claimed in claim 2 is characterized in that, described cutting ferrule sealing comprises:
One is embedded at the O-ring seal in the described awl end;
One is embedded in the described awl end and coats the cutting ferrule of described O-ring seal; And
One is located at the outer gland nut of described cutting ferrule, and described gland nut coats described awl end.
4. fluid level transmitter as claimed in claim 3 is characterized in that, described pressure inlet comprises one first groove and one second groove, and described diffuse si core body is embedded in described first groove, and described detachable end cap is embedded in described second groove.
5. fluid level transmitter as claimed in claim 4 is characterized in that the inwall of described second groove is provided with internal thread.
6. fluid level transmitter as claimed in claim 5 is characterized in that, described detachable end cap be provided with one with the corresponding male connection of described internal thread.
7. as any described fluid level transmitter in the claim 1 to 6, it is characterized in that, also be provided with a dividing busing in the described housing.
CN2011100532419A 2011-03-04 2011-03-04 Liquid level transmitter Pending CN102200461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100532419A CN102200461A (en) 2011-03-04 2011-03-04 Liquid level transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100532419A CN102200461A (en) 2011-03-04 2011-03-04 Liquid level transmitter

Publications (1)

Publication Number Publication Date
CN102200461A true CN102200461A (en) 2011-09-28

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Family Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102980628A (en) * 2012-12-31 2013-03-20 西安工业大学 Anti-freezing type bottom installed liquid level measuring device
CN103335690A (en) * 2013-01-15 2013-10-02 汇润机电有限公司 Pressure-sensitive oil level sensor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2211601Y (en) * 1994-05-20 1995-11-01 上海天水电器厂 Pressure transducer
US6484585B1 (en) * 1995-02-28 2002-11-26 Rosemount Inc. Pressure sensor for a pressure transmitter
CN1702364A (en) * 2005-04-19 2005-11-30 阮浩丰 Pipe joint
CN2867307Y (en) * 2006-01-24 2007-02-07 宝山钢铁股份有限公司 Multifunction liquid level detector
CN200947052Y (en) * 2006-09-12 2007-09-12 李炳蔚 Insertion column type capacitor sensor level measuring apparatus
CN202255540U (en) * 2011-03-04 2012-05-30 上海盛迪传感技术有限公司 Liquid level transmitter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2211601Y (en) * 1994-05-20 1995-11-01 上海天水电器厂 Pressure transducer
US6484585B1 (en) * 1995-02-28 2002-11-26 Rosemount Inc. Pressure sensor for a pressure transmitter
CN1702364A (en) * 2005-04-19 2005-11-30 阮浩丰 Pipe joint
CN2867307Y (en) * 2006-01-24 2007-02-07 宝山钢铁股份有限公司 Multifunction liquid level detector
CN200947052Y (en) * 2006-09-12 2007-09-12 李炳蔚 Insertion column type capacitor sensor level measuring apparatus
CN202255540U (en) * 2011-03-04 2012-05-30 上海盛迪传感技术有限公司 Liquid level transmitter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102980628A (en) * 2012-12-31 2013-03-20 西安工业大学 Anti-freezing type bottom installed liquid level measuring device
CN103335690A (en) * 2013-01-15 2013-10-02 汇润机电有限公司 Pressure-sensitive oil level sensor

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Application publication date: 20110928

C02 Deemed withdrawal of patent application after publication (patent law 2001)