CN114136400A - Quick plug-in type throw-in liquid level meter - Google Patents

Quick plug-in type throw-in liquid level meter Download PDF

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Publication number
CN114136400A
CN114136400A CN202111585054.5A CN202111585054A CN114136400A CN 114136400 A CN114136400 A CN 114136400A CN 202111585054 A CN202111585054 A CN 202111585054A CN 114136400 A CN114136400 A CN 114136400A
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CN
China
Prior art keywords
shell
sensor
air guide
pcb
host
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
CN202111585054.5A
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Chinese (zh)
Inventor
王学斌
胡永强
李国权
周瑞雪
燕子旺
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.)
Tangshan Pingsheng Electronics Technology Development Co ltd
Original Assignee
Tangshan Pingsheng Electronics Technology Development 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 Tangshan Pingsheng Electronics Technology Development Co ltd filed Critical Tangshan Pingsheng Electronics Technology Development Co ltd
Priority to CN202111585054.5A priority Critical patent/CN114136400A/en
Publication of CN114136400A publication Critical patent/CN114136400A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5216—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases characterised by the sealing material, e.g. gels or resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

The invention discloses a quick plug-in type drop-in liquid level meter. The sensor is arranged in the host, the host comprises a sensor shell and a host shell, the sensor is arranged in a stepped hole of the sensor shell through a compression nut, and a protective cover is arranged at one end of the sensor shell far away from the compression nut; a control main PCB electrically connected with the sensor is installed on the outer side of the compression nut, the outer end of the control main PCB is electrically connected with a first switching PCB through a pin header, the control main PCB and the first switching PCB are externally sleeved with a host shell hermetically connected with the sensor shell, the outer end of an air guide extension pipe communicated with an air guide pipe orifice of the sensor penetrates through the first switching PCB and is close to an outer port of the host shell, a female plug is installed on the outer side of the first switching PCB, and jelly glue is filled in a host shell on the inner side of the female plug; the air guide cable is provided with a cable joint, and a male plug connected with the female plug in a plugging manner is arranged in the cable joint. The liquid level meter is a plug-in type connecting structure, is convenient to assemble and is simple to maintain.

Description

Quick plug-in type throw-in liquid level meter
Technical Field
The invention relates to a liquid level meter, in particular to a quick plug-in type drop-in liquid level meter.
Background
The principle of the drop-in type liquid level meter is that based on the proportion of the static pressure of the measured liquid and the height of the liquid, the drop-in type liquid level meter is manufactured by adopting an isolated diffused silicon sensitive element or a ceramic capacitance pressure sensitive sensor, thereby converting the static pressure into an electric signal, and converting the electric signal into a standard electric signal through temperature compensation and linear correction.
The input type liquid level meter has the characteristics of good stability, high precision, convenience in installation and use and the like, and is widely applied to the water level monitoring fields of urban water supply and drainage, sewage treatment, underground water, reservoirs, riverways, oceans and the like. At present, most of the drop-in type liquid level meters connect a sensor, a control PCB and a cable together and are wrapped into a whole by a stainless steel shell. Once a problem occurs in the seal at a certain position of the shell or the cable is broken, the measured liquid enters the stainless steel shell, and the whole liquid level meter is damaged. The invention discloses a throwing-in type liquid level meter with an authorization publication number of CN211602087U, wherein an inner circle thread connecting part is arranged inside the upper side of an outer cylinder, and an outer circle thread connecting part is arranged on the outer circle of the lower end of the outer cylinder, so that the sealing property is poor.
Disclosure of Invention
The invention aims to solve the technical problems and provides a quick plug-in type drop-in liquid level meter which is simple in assembly and maintenance and has a plug-in connection structure.
The invention solves the technical problem, and adopts the technical scheme that:
a quick plug-in type drop-in liquid level meter comprises a sensor and an air guide cable, wherein the sensor is arranged in a host, the host comprises a sensor shell and a host shell, the sensor is arranged in a stepped hole of the sensor shell through a compression nut, and a protective cover is arranged at one end, far away from the compression nut, of the sensor shell;
a control main PCB electrically connected with the sensor is installed on the outer side of the compression nut, the outer end of the control main PCB is electrically connected with a first switching PCB through a pin header, the control main PCB and the first switching PCB are externally sleeved with a host shell hermetically connected with the sensor shell, the outer end of an air guide extension pipe communicated with an air guide pipe orifice of the sensor penetrates through the first switching PCB and is close to an outer port of the host shell, a female plug is installed on the outer side of the first switching PCB, and jelly glue is filled in a host shell on the inner side of the female plug;
the air guide cable is provided with a cable joint, a male plug connected with the female plug in a plugging manner is arranged in the cable joint, and the cable joint is sleeved with a locking nut which is detachably and hermetically connected with the main machine shell.
Compared with the prior art, the invention adopting the technical scheme has the beneficial effects that:
the liquid level meter is of a plug-in type connecting structure, so that the liquid level meter is convenient to assemble and simple to maintain; the main machine shell is filled with glue for sealing, so that the leakage problem of the liquid level meter is solved; the damage of the cable can not cause the liquid to enter the main machine to cause the damage of the liquid level meter sensor.
Further, the optimization scheme of the invention is as follows:
the male plug is arranged at one end in a connector shell of the cable connector, a second adapter PCB is arranged on the connector shell on the inner side of the male plug, and the male plug is electrically connected with the second adapter PCB; the air guide cable penetrates into the connector shell from one end, far away from the male plug, of the connector shell, the air guide cable is electrically connected with the second adapter PCB, the air guide tube of the air guide cable penetrates through the second adapter PCB, the waterproof breathable film is installed at the outer end of the air guide tube, the air guide cable and the connector shell are sleeved with the locking nut, and the male plug and the female plug are tightly pressed through the connector shell after the locking nut is connected with the host shell; the port of the air duct is close to the port of the air guide extension duct.
The root of the screw thread at the joint of the sensor shell and the protective cover is provided with a first O-shaped ring.
The root of the thread at the joint of the sensor shell and the host shell is provided with an annular groove structure, a second O-shaped ring is arranged in the annular groove structure, and the second O-shaped ring is connected with the inner wall of the host shell in a sealing mode.
And one end of the male plug of the host shell is provided with an external thread, and the root part of the external thread is sleeved with a third O-shaped ring.
One end of the connector shell, which is far away from the male plug, is provided with a taper hole structure, a sealing ring of a frustum structure is arranged in the taper hole structure, and the air guide cable penetrates through the sealing ring.
Epoxy resin glue is filled and sealed in the joint shell on the inner side of the second switching PCB.
The outer peripheral face of the male plug end of the connector shell is provided with a groove structure, and a fourth O-shaped ring is arranged in the groove structure.
And the outer end of the air guide extension pipe is provided with a waterproof breathable film.
The outer end of the protective cover is conical, and the conical wall of the protective cover is provided with a through hole structure.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the main housing according to the embodiment of the present invention;
fig. 3 is a schematic view of the internal structure of the cable connector according to the embodiment of the present invention.
In the figure: a host 1; a sensor housing 101; a sensor 102; a compression nut 103; a first screw 104; a control main PCB board 105; a first transfer PCB board 106; a pin header 107; an air guide extension tube 108; a first waterproof breathable film 109; a first O-ring 110; a second O-ring 111; a protective cover 112; a host housing 113; a third O-ring 114; a sealant 115; a cable joint 2; a connector housing 201; a second transfer PCB board 202; a second screw 203; a second waterproof, breathable membrane 204; a fourth O-ring 205; an epoxy glue 206; a tapered bore structure 207; a boss structure 208; a lock nut 3; a female plug 4; a male plug 5; a seal ring 6; an air guide cable 7; a core wire 701; an airway tube 702.
Detailed Description
The invention is further described in detail below with reference to the figures and examples.
Referring to fig. 1 to 3, the present embodiment is a quick plug-in type drop-in level gauge, which is composed of a host 1, a cable connector 2, a lock nut 3, a female plug 4, a male plug 5, and the like. The main unit 1 is composed of a sensor case 101, a sensor 102, a compression nut 103, a control main PCB board 105, a first relay PCB board 106, a main unit case 113, and the like. The sensor shell 101 is provided with a stepped hole penetrating through the sensor shell body, the outer circumference of the sensor shell 101 is of a stepped shaft structure, the middle of the outer circumference of the sensor 102 is provided with an annular groove, a sealing ring is arranged in the annular groove, the sensor 102 is arranged in the stepped hole of the sensor shell 101, the outer side of the sensor 102 is provided with a compression nut 103, the compression nut 103 is provided with external threads, the external threads are meshed with internal threads of the inner wall of the sensor shell 101, and the compression nut 103 compresses and fixes the sensor 102.
The outer side of the gland nut 103 is provided with a control main PCB 105, the control main PCB 105 is electrically connected with the sensor 102, the control main PCB 105 is connected with the gland nut 103 through a first screw 104, the outer end of the control main PCB 105 is electrically connected with a first switching PCB 106 through a pin header 107, and a cylindrical host shell 113 is sleeved outside the control main PCB 105 and the first switching PCB 106. The host machine shell 113 is installed on the sensor shell 101, the internal thread of the host machine shell 113 is connected with the external thread of the sensor shell 101, the root of the external thread of the sensor shell 101 is provided with two annular groove structures, a first O-shaped ring 110 is installed in each groove structure, and the first O-shaped ring 110 is sealed with the smooth wall section of the cylinder wall of the host machine shell 113. An air guide pipe port of the sensor 102 is communicated with the inner end of an air guide extension pipe 108, the outer end of the air guide extension pipe 108 penetrates through the first adapter PCB 106 and is close to the outer port of the main machine shell 113, and a first waterproof air-permeable film 109 is arranged at the outer end of the air guide extension pipe 108.
The female plug 4 is installed on the outer side of the first adapter PCB 106, the female plug 4 is electrically connected with the first adapter PCB 106, and jelly glue is filled in the host machine shell 113 between the female plug 4 and the gland nut 103. The shaft head part of the sensor shell 101 is provided with an external thread, the shaft head part is far away from the compression nut 103, a tool withdrawal groove of the external thread of the shaft head part is internally provided with a second O-shaped ring 111, a protective cover 112 is arranged at the shaft head part, the protective cover 112 is conical, the cover wall of the protective cover is provided with a through hole structure, and the inner end face of the protective cover 112 abuts against a shaft shoulder of the shaft head part of the sensor shell 101. The outer end of the air guide extension tube 108 is located inside the outer end face of the female plug 4. The outer peripheral surface of the main body case 113 at one end of the female plug 4 is of a stepped shaft structure, an external thread is processed at the outer end of the shaft head part of the main body case 113, and a third O-ring 114 is installed in a tool withdrawal groove of the external thread.
The end of the air guide cable 7 is mounted with the cable connector 2, and the cable connector 2 is composed of a connector housing 201, a second relay PCB 202, a second screw 203, and the like. The connector shell 201 is provided with a stepped hole penetrating through the body of the connector shell, the stepped surface of the stepped hole is close to the plugging end of the connector shell 201, the middle of the outer peripheral surface of the connector shell 201 is provided with an annular boss structure, the outer peripheral surface of the plugging end of the connector shell 201 is processed with two annular groove structures, a fourth O-shaped ring 205 is respectively installed in the two annular groove structures, and the tail end of the connector shell 201 is provided with a taper hole structure 207. The second adaptor PCB 202 is mounted on a step surface of the stepped hole of the connector housing 201 through a second screw 203, the male plug 5 is mounted on an outer side surface of the second adaptor PCB 202, the male plug 5 is electrically connected with the second adaptor PCB 202, and the male plug 5 is used for being connected with the female plug 4 in a plugging manner. The terminal of the air guide cable 7 is inserted into the stepped hole of the connector shell 201 from the tail end of the connector shell, the core wire 702 of the air guide cable 7 is electrically connected with the second adapter PCB 202, the air guide tube 702 of the air guide cable 7 penetrates through the second adapter PCB 202, and the outer end of the air guide tube 702 is provided with the second waterproof air-permeable membrane 204. A sealing ring 6 of a frustum structure is arranged in the taper hole structure 207 of the joint shell 201, and an air guide cable 7 passes through the sealing ring 6. Epoxy resin glue is filled and sealed in the joint shell 201 between the second adapter PCB 202 and the sealing ring 6.
The locking nut 3 is sleeved outside the cable joint 2 and the air guide cable 7, the locking nut 3 is of a sleeve structure, the tail end of the locking nut 3 is conical, an internal thread is arranged at the connecting end of the locking nut 3, after the male plug 5 is inserted into the female plug 4, the internal thread of the locking nut 3 is connected with an external thread at the shaft head part of the host shell 113, a conical part is arranged on the inner wall of a port of the locking nut 3, and the conical part compresses and seals the third O-shaped ring 114; the tail end of the locking nut 3 compresses the sealing ring 6 to deform, and after the sealing ring 6 deforms, the locking nut 3 and the air guide cable 7 are sealed. After the host 1 is connected with the cable connector 2, a plug cavity is formed between the male plug 5 and the female plug 4, the outer end of the air guide extension pipe 108 and the outer end of the air guide pipe 702 are both located in the plug cavity, and the port of the air guide extension pipe 108 is opposite to and close to the port of the air pipe 702.
The liquid level meter is of a plug-in structure, and is simple to assemble and maintain; the host and the cable joint are respectively sealed by glue filling, and the cable is also sealed by epoxy resin glue, so that the possibility of leakage of the liquid level meter is greatly reduced; the damage of the cable can not cause the liquid to enter the main machine to cause the damage of the liquid level meter sensor; the host computer has 2 layers of sealings with cable joint, even the sealing washer is too excessive and reveals, liquid can only get into the plug intracavity of host computer and cable joint, can not cause the damage of level gauge in short-term, nevertheless can make the level gauge inaccurate to discover to reveal and carry out timely maintenance. The whole liquid level meter is of a plug-in type, each part is sealed by sealing glue independently, the leakage point is reduced, and the leakage of a single part cannot cause the damage of the liquid level meter.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.

Claims (10)

1. The utility model provides a quick plug-in type input level gauge, includes sensor, air guide cable, its characterized in that:
the sensor is arranged in the host, the host comprises a sensor shell and a host shell, the sensor is arranged in a stepped hole of the sensor shell through a compression nut, and a protective cover is arranged at one end of the sensor shell far away from the compression nut;
a control main PCB electrically connected with the sensor is installed on the outer side of the compression nut, the outer end of the control main PCB is electrically connected with a first switching PCB through a pin header, the control main PCB and the first switching PCB are externally sleeved with a host shell hermetically connected with the sensor shell, the outer end of an air guide extension pipe communicated with an air guide pipe orifice of the sensor penetrates through the first switching PCB and is close to an outer port of the host shell, a female plug is installed on the outer side of the first switching PCB, and jelly glue is filled in a host shell on the inner side of the female plug;
the air guide cable is provided with a cable joint, a male plug connected with the female plug in a plugging manner is arranged in the cable joint, and the cable joint is sleeved with a locking nut which is detachably and hermetically connected with the main machine shell.
2. The quick-connect drop-in level gauge of claim 1, wherein: the male plug is arranged at one end in a connector shell of the cable connector, a second adapter PCB is arranged on the connector shell on the inner side of the male plug, and the male plug is electrically connected with the second adapter PCB; the air guide cable penetrates into the connector shell from one end, far away from the male plug, of the connector shell, the air guide cable is electrically connected with the second adapter PCB, the air guide tube of the air guide cable penetrates through the second adapter PCB, the waterproof breathable film is installed at the outer end of the air guide tube, the air guide cable and the connector shell are sleeved with the locking nut, and the male plug and the female plug are tightly pressed through the connector shell after the locking nut is connected with the host shell; the port of the air duct is close to the port of the air guide extension duct.
3. The quick-connect drop-in level gauge of claim 1, wherein: the root of the thread at the joint of the sensor shell and the protective cover is provided with a first O-shaped ring.
4. The quick-connect drop-in level gauge of claim 1, wherein: the root of the thread at the joint of the sensor shell and the host shell is provided with an annular groove structure, a second O-shaped ring is arranged in the annular groove structure, and the second O-shaped ring is connected with the inner wall of the host shell in a sealing mode.
5. The quick-connect drop-in level gauge of claim 1, wherein: and one end of the male plug of the host shell is provided with an external thread, and the root part of the external thread is sleeved with a third O-shaped ring.
6. The quick-connect drop-in level gauge of claim 2, wherein: one end of the connector shell, which is far away from the male plug, is provided with a taper hole structure, a sealing ring of a frustum structure is arranged in the taper hole structure, and the air guide cable penetrates through the sealing ring.
7. The quick-connect drop-in level gauge of claim 2, wherein: epoxy resin glue is filled and sealed in the joint shell on the inner side of the second switching PCB.
8. The quick-connect drop-in level gauge of claim 2, wherein: the outer peripheral face of the male plug end of the connector shell is provided with a groove structure, and a fourth O-shaped ring is arranged in the groove structure.
9. The quick-connect drop-in level gauge of claim 1, wherein: and the outer end of the air guide extension pipe is provided with a waterproof breathable film.
10. The quick-connect drop-in level gauge of claim 1, wherein: the outer end of the protective cover is conical, and the conical wall of the protective cover is provided with a through hole structure.
CN202111585054.5A 2021-12-23 2021-12-23 Quick plug-in type throw-in liquid level meter Pending CN114136400A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111585054.5A CN114136400A (en) 2021-12-23 2021-12-23 Quick plug-in type throw-in liquid level meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111585054.5A CN114136400A (en) 2021-12-23 2021-12-23 Quick plug-in type throw-in liquid level meter

Publications (1)

Publication Number Publication Date
CN114136400A true CN114136400A (en) 2022-03-04

Family

ID=80383126

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111585054.5A Pending CN114136400A (en) 2021-12-23 2021-12-23 Quick plug-in type throw-in liquid level meter

Country Status (1)

Country Link
CN (1) CN114136400A (en)

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