CN213694200U

CN213694200U - Piece formula heating rod of sensor

Info

Publication number: CN213694200U
Application number: CN202022831310.1U
Authority: CN
Inventors: 朱长松; 陈明松
Original assignee: Shenzhen Jutuo Technology Co ltd
Current assignee: Shenzhen Jutuo Technology Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-07-13
Anticipated expiration: 2030-11-30

Abstract

The utility model provides a sheet type heating rod of a sensor with novel structural design; including the casing, the casing is cylindric structure, and the welding has the nut on the lateral wall of casing, and the axle center department welding of casing bottom outer wall has the screw column section of thick bamboo, and the outside of screw column section of thick bamboo has cup jointed the sealing ring, and the other end welding that the casing was kept away from to the screw column section of thick bamboo has the heating rod, and the heating rod is hollow structure, sets up the through-hole that the equidistance is the annular structure and distributes on the lateral wall of heating rod. The utility model discloses set up the through-hole that the equidistance is the annular structure and distributes on the lateral wall of heating rod, the effectual contact surface that increases sensor and gas has promoted the accuracy and the sensitivity of sensor detection data, eliminated the technological complexity that heating electrode welding arouses above sensor element in the prior art, simplified sensor element chip structure, preparation and production process have obtained corresponding simplification, have promoted sensor chip's life for the yield obtains improving.

Description

Piece formula heating rod of sensor

Technical Field

The utility model belongs to the technical field of the car sensor technique and specifically relates to a piece formula heating rod of sensor.

Background

In an engine using a three-way catalytic converter to reduce exhaust pollution, an oxygen sensor is an essential element, and since the purification capacity of a three-way catalyst for CO, HC and NOx is rapidly reduced when the air-fuel ratio of a mixture deviates from the theoretical air-fuel ratio, the oxygen sensor is mounted in an exhaust pipe to detect the concentration of oxygen in exhaust gas and send a feedback signal to an ECU, and the ECU controls the increase and decrease of the fuel injection amount of an injector to control the air-fuel ratio of the mixture to be near the theoretical value.

In the prior art, the number of holes of the heating rod is small, so that the contact area between the sensor element and gas is directly reduced, and the accuracy of detected data is poor. Therefore, a sensor plate heating rod is needed to solve the above problems.

Disclosure of Invention

An object of the utility model is to overcome prior art's is not enough, adapts to reality needs, provides the piece formula heating rod of a novel structural design's sensor.

In order to realize the utility model discloses a purpose, the utility model discloses the technical scheme who adopts does:

the utility model provides a chip type heating rod of sensor, includes the casing, the casing is cylindric structure, and the welding has the nut on the lateral wall of casing, the axle center department welding of casing bottom outer wall has a screw cylinder, and the outside of screw cylinder has cup jointed the sealing ring, the other end welding that the casing was kept away from to the screw cylinder has the heating rod, and the heating rod is hollow structure, set up the through-hole that the equidistance is the annular structure and distributes on the lateral wall of heating rod, and the top welding of casing has the cast PTFE pipe, the other end threaded connection that the casing was kept away from to the cast PTFE pipe has the rubber post, and the inside of rubber post is pegged graft and is had the wiring that extends to the cast.

The sealing cover is inserted in the center of the shell, the insulating covers are inserted in the two ends of the shell, and the sealing cover and the insulating covers are attached to each other.

The sensor element is welded at one end of the wiring, which is positioned in the PTFE casting pipe, and the sensor element is of a sheet-plate structure.

The axes of the insulating sleeve and the sealing bag are provided with positioning holes which are communicated with each other, and the sensor element penetrates through the positioning holes and extends to the inside of the heating rod.

Ceramic columns are pressed on the inner side wall of the shell, an annular cavity is formed in the ceramic columns, and electric heating tubes distributed in a spiral disc tubular structure are laid in the annular cavity.

The welding has the heat conduction fin that is equidistant structure and distributes on the lateral wall of electrothermal tube, and heat conduction fin and the laminating of side wall in the annular chamber mutually, heat conduction fin is ring form structure.

The beneficial effects of the utility model reside in that:

(1) this design utilizes the heating rod, has seted up the equidistance on the lateral wall of heating rod and is the through-hole that the annular structure distributes, the effectual contact surface that has increased sensor and gas, has promoted the accuracy and the sensitivity of sensor detection data.

(2) The design utilizes the electric heating tube, eliminates the process complexity caused by welding the heating electrode on the sensor element in the prior art, simplifies the structure of the sensor element chip, correspondingly simplifies the manufacturing and production processes, prolongs the service life of the sensor chip and improves the yield.

(3) This design utilizes insulating cover and sealed package, and the cooperation of insulating cover and sealed package is used for sensor element is more stable firm in the inside of casing, and the condition of electric leakage and short circuit that the insulating cover can effectively avoid sensor element and casing direct contact to lead to.

Drawings

FIG. 1 is a schematic diagram of the structure of the present design;

FIG. 2 is a schematic bottom view of the present design;

FIG. 3 is a schematic diagram of the explosive structure in the present design;

FIG. 4 is a schematic view of the housing of the present design;

fig. 5 is a schematic view of the structure of the electrical heating tube in the present design.

In the figure: the device comprises a shell 1, a nut 2, a PTFE cast tube 3, a rubber column 4, a wiring 5, a stud barrel 6, a heating rod 7, a through hole 8, a sealing ring 9, a sensor element 10, an insulating sleeve 11, a sealing bag 12, a positioning hole 13, a ceramic column 14, an annular cavity 15, an electric heating tube 16 and a heat conduction fin 17.

Detailed Description

The invention will be further described with reference to the following figures and examples:

a plate type heating rod of a sensor, referring to figures 1 to 5, comprises a shell 1, wherein the shell 1 is in a cylindrical structure, the outer side wall of the shell 1 is welded with a nut 2, the axis of the outer wall of the bottom of the shell 1 is welded with a stud barrel 6, and the outer part of the stud cylinder 6 is sleeved with a sealing ring 9, the other end of the stud cylinder 6 far away from the shell 1 is welded with a heating rod 7, the heating rod 7 is of a hollow structure, through holes 8 which are distributed in an annular structure at equal intervals are arranged on the outer side wall of the heating rod 7, the top end of the shell 1 is welded with a PTFE casting pipe 3, the other end of the PTFE casting pipe 3 far away from the shell 1 is connected with a rubber column 4 by screw thread, and the inside grafting of rubber column 4 has the wiring 5 that extends to 3 inside PTFE cast tubes, offers the equidistance on the lateral wall of heating rod 7 to be the through-hole 8 that the annular structure distributes, the effectual contact surface that has increased sensor and gas, has promoted the accuracy and the sensitivity of sensor detection data.

Furthermore, the inside of casing 1 pegs graft respectively in this design has sealed package 12 and insulating cover 11, and sealed package 12 pegs graft in the inside center department of casing 1, and insulating cover 11 pegs graft in the inside at casing 1 both ends, and laminates between sealed package 12 and the insulating cover 11 mutually, and insulating cover 11 can effectively avoid the condition of electric leakage and short circuit that sensor element 10 and casing 1 direct contact lead to.

Further, in the design, one end of the connecting wire 5, which is positioned inside the PTFE cast pipe 3, is welded with the sensor element 10, and the sensor element 10 is of a sheet-shaped structure.

Furthermore, in the design, the axes of the insulating sleeve 11 and the sealing bag 12 are provided with positioning holes 13 which are communicated with each other, and the sensor element 10 penetrates through the positioning holes 13 and extends to the inside of the heating rod 7, so that the insulating sleeve 11 and the sealing bag 12 are used in cooperation, and the sensor element 10 is more stable and firm in the inside of the shell 1.

Furthermore, ceramic columns 14 are pressed on the inner side wall of the shell 1 in the design, an annular cavity 15 is formed in the ceramic columns 14, electric heating tubes 16 distributed in a spiral disc tubular structure are laid in the annular cavity 15, the ceramic columns 14 can well protect the electric heating tubes 16, and meanwhile the heat conduction and heat dissipation efficiency of the ceramic columns 14 is excellent.

Further, the welding has the heat conduction fin 17 that is equidistant structure distribution on the lateral wall of electrothermal tube 16 in this design, and heat conduction fin 17 laminates mutually with the 15 inboard walls of annular chamber, and heat conduction fin 17 is the ring form structure, and heat conduction fin 17 is the equidistance and distributes on the lateral wall of electrothermal tube 16, and then has promoted electrothermal tube 16's heat conduction efficiency, makes electrothermal tube 16's cloth thermal efficiency more even simultaneously.

To sum up the utility model discloses a theory of operation does: when in use, the ceramic posts 14 are pressed on the inner wall of the shell 1, the overall structural strength of the shell 1 is improved, the insulating sleeve 11 and the sealing bag 12 are used together, so that the sensor element 10 is more stable and firm in the shell 1, the insulating sleeve 11 can effectively avoid the conditions of electric leakage and short circuit caused by the direct contact between the sensor element 10 and the shell 1, the electric heating tube 16 is laid in the annular cavity 15, which eliminates the process complexity caused by welding the heating electrode on the sensor element 10 in the prior art, simplifies the chip structure of the sensor element 10, correspondingly simplifies the manufacturing and production processes, prolongs the service life of the sensor chip, improves the yield, simultaneously, set up on the lateral wall of heating rod 7 the equidistance and be the through-hole 8 that the annular structure distributes, the effectual contact surface that increases sensor and gas has promoted the accuracy and the sensitivity of sensor detection data.

The embodiment of the present invention discloses a preferred embodiment, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention according to the above embodiment, and make different extensions and changes, but do not depart from the spirit of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A sheet type heating rod of a sensor comprises a shell (1) and is characterized in that the shell (1) is of a cylindrical structure, the outer side wall of the shell (1) is welded with a nut (2), the axis of the outer wall of the bottom of the shell (1) is welded with a stud barrel (6), a sealing ring (9) is sleeved outside the stud cylinder (6), the other end of the stud cylinder (6) far away from the shell (1) is welded with a heating rod (7), the heating rod (7) is of a hollow structure, through holes (8) which are distributed in an annular structure at equal intervals are arranged on the outer side wall of the heating rod (7), the top end of the shell (1) is welded with a PTFE casting pipe (3), the other end of the PTFE casting pipe (3) far away from the shell (1) is connected with a rubber column (4) in a threaded manner, and a connecting wire (5) extending to the interior of the PTFE casting pipe (3) is inserted into the rubber column (4).

2. The plate heater bar of a sensor as set forth in claim 1, wherein: the sealing structure is characterized in that a sealing bag (12) and an insulating sleeve (11) are respectively inserted into the shell (1), the sealing bag (12) is inserted into the center of the interior of the shell (1), the insulating sleeve (11) is inserted into the interior of two ends of the shell (1), and the sealing bag (12) is attached to the insulating sleeve (11).

3. The plate heater bar of a sensor as set forth in claim 1, wherein: the sensor element (10) is welded at one end of the wiring (5) located inside the PTFE casting pipe (3), and the sensor element (10) is of a sheet plate-shaped structure.

4. The plate heater bar of a sensor as set forth in claim 2, wherein: the axes of the insulating sleeve (11) and the sealing bag (12) are provided with positioning holes (13) which are communicated with each other, and the sensor element (10) penetrates through the positioning holes (13) and extends into the heating rod (7).

5. The plate heater bar of a sensor as set forth in claim 1, wherein: ceramic columns (14) are pressed on the inner side wall of the shell (1), an annular cavity (15) is formed in the ceramic columns (14), and electric heating tubes (16) distributed in a spiral disc tubular structure are laid in the annular cavity (15).

6. The plate heater bar of a sensor as set forth in claim 5, wherein: the outer side wall of the electric heating pipe (16) is welded with heat conducting fins (17) distributed in an equidistant structure, the heat conducting fins (17) are attached to the inner side wall of the annular cavity (15), and the heat conducting fins (17) are of an annular structure.