CN217738535U

CN217738535U - Pressure sensor

Info

Publication number: CN217738535U
Application number: CN202221531548.5U
Authority: CN
Inventors: 黄爱勇
Original assignee: Wuxi Borristone Technology Co ltd
Current assignee: Wuxi Borristone Technology Co ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-11-04
Anticipated expiration: 2032-06-17

Abstract

The utility model discloses a pressure sensor, including the pipeline, the pipeline middle part is provided with the seal box, and the side of seal box is provided with the wiring mouth, is provided with circuit board and sensor main part in the seal box, along radially seting up the jack with the inside intercommunication of seal box on the pipeline, inside the probe of main part runs through the jack and extends to the pipeline, main part and jack sealing connection, the probe lies in the inside partial length of pipeline and is 1/3-1/4 of the pipeline internal diameter of probe department, and circuit board and main part can dismantle through the mounting and connect inside the seal box. The utility model discloses the inside length of probe insertion pipeline is 1/3-1/4 of this department's pipeline internal diameter, has reduced the pipeline inner space that the probe occupy, directly link up around the pipeline is inside simultaneously, has reduced the interior fluidic resistance of pipeline and the volume of remaining, and then reduces the probability that the pipeline takes place to block up, has promoted pressure sensor's stability and fault-tolerant rate.

Description

Pressure sensor

Technical Field

The utility model belongs to the technical field of the main part, especially, relate to a pressure sensor.

Background

The urea pump is an important component of a urea solution injection metering system, and has the main functions of pumping the urea solution in the urea tank, maintaining a certain pressure and then conveying the urea solution to the injection unit to meet the requirements of the injection metering system on flow and pressure, and the hydraulic pressure of the urea solution is usually detected by using a pressure sensor.

Current pressure sensor's probe has taken most runner space in stretching into the liquid way runner to still be provided with barriers such as check valve in the runner, this kind of design makes liquid remain easily and forms the segment liquid column in barrier and probe department, and the liquid column loses water and forms white firm crystallization thing after and piles up in the runner, thereby causes the runner to block up and make the main part block up the inefficacy, consequently, needs a pressure sensor in order to solve above problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pressure sensor to it is big to solve current pressure sensor runner internal resistance, leads to its technical problem who takes place to block up easily.

In order to achieve the above object, the present invention provides a pressure sensor, which comprises:

the utility model provides a pressure sensor, includes the pipeline, the pipeline middle part is provided with the seal box, the side of seal box is provided with the wiring mouth, be provided with circuit board and sensor main part in the seal box, radially set up on the pipeline with the jack of the inside intercommunication of seal box, the probe of main part runs through the jack extends to inside the pipeline, the main part with jack sealing connection, the probe is located the inside partial length of pipeline does 1/3-1/4 of the pipeline internal diameter of probe department, the circuit board with the main part passes through the mounting and can dismantle the connection and be in inside the seal box.

Preferably, in order to improve the sealing performance at the position of the jack and prevent liquid leakage at the position, a protruding portion is arranged on the inner bottom wall of the sealing box and located at the opening of the jack, the jack penetrates through the protruding portion, an inner concave portion is arranged on the bottom surface of the main body and located inside the inner concave portion, and a sealing ring is arranged between the outer peripheral surface of the protruding portion and the inner peripheral surface of the inner concave portion.

Preferably, in order to reinforce the probe and improve the installation stability of the probe, a reinforcing groove is axially formed in the side wall of the jack, two ends of the reinforcing groove are communicated with the outside to form a through groove, and the side edge of the probe is inserted into the reinforcing groove.

Preferably, in order to improve the strength of the pressure sensor and reduce the possibility of damage to the main body, a plurality of reinforcing strips are circumferentially arranged on the outer surface of the pipeline around the axis of the pipeline, and each reinforcing strip is arranged along the axial direction of the pipeline.

Preferably, in order to promote the firmness of installation of main part and circuit board, the mounting includes the gusset plate, the bottom surface of gusset plate with the main part butt, the circuit board passes through the screw fixation and is in the top surface of gusset plate, the both sides limit of gusset plate all is provided with the piece of buckling, be provided with the locating piece on the piece of buckling, seted up on the inside wall of seal box with the constant head tank that the locating piece matches, the locating piece sets up inside the constant head tank.

Preferably, in order to improve the installation stability of the reinforcing plate, a positioning column is fixed on the bottom surface of the reinforcing plate, a positioning blind hole matched with the positioning column is formed in the inner bottom wall of the sealing box, and the positioning column is inserted into the positioning blind hole.

Preferably, in order to promote the convenient degree that pressure sensor overhauld, the seal box deviates from one side of pipeline is provided with the opening, the opening part is provided with sealed lid, sealed lid sets up open-ended inboard.

Preferably, in order to improve the sealing performance of the sealing box and improve the convenience of dismounting the sealing cover, the edge of the opening of the sealing box is circumferentially provided with an insertion groove, the edge of the sealing cover is bent towards one side to form an annular insertion strip, and the insertion strip is inserted into the insertion groove.

Preferably, in order to improve the firmness of the sealing cover, a plurality of abutting parts are arranged on the sealing cover, and each abutting part abuts against the inner side wall of the sealing box.

Preferably, in order to improve the detection accuracy of the pressure sensor, the inner diameter of the middle part of the pipeline is smaller than the inner diameters of the two ends of the pipeline.

The utility model discloses a pressure sensor has following advantage: the length of the probe inserted into the pipeline is 1/3-1/4 of the inner diameter of the pipeline, the internal space of the pipeline occupied by the probe is reduced, meanwhile, the front part and the rear part of the inside of the pipeline are directly communicated, the resistance and the residual quantity of fluid in the pipeline are reduced, the probability of blockage of the pipeline is further reduced, and the stability and the fault tolerance rate of the pressure sensor are improved.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a view from the C-C direction of FIG. 2;

FIG. 4 is an enlarged view of the portion A of FIG. 3;

fig. 5 is a cross-sectional view of the present invention;

FIG. 6 is an enlarged view of the portion B of FIG. 5;

the symbols in the figure illustrate: 1. a pipeline; 2. a sealing box; 3. a wiring port; 4. a sealing cover; 5. a reinforcing strip; 6. an abutting portion; 7. a circuit board; 8. a reinforcing plate; 9. a probe; 10. a main body; 11. a jack; 12. inserting strips; 13. inserting grooves; 14. positioning a groove; 15. positioning blocks; 16. bending the sheet; 17. a positioning column; 18. positioning the blind hole; 19. a boss portion; 20. an inner concave portion; 21. a reinforcing groove; 22. and (4) sealing the plug.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, the following description is made in detail with reference to the accompanying drawings.

As shown in fig. 1, 2 and 6, a pressure sensor comprises a pipeline 1, a sealing box 2 is integrally formed in the middle of the pipeline 1, a plurality of reinforcing strips 5 are arranged on the outer surface of the pipeline 1 around the axis circumference of the pipeline 1, the reinforcing strips 5 are arranged along the axial direction of the pipeline 1, the strength of the pipeline 1 is improved through the reinforcing strips 5, the anti-collision performance of the pipeline 1 is improved, a wiring port 3 is arranged on the side surface of the sealing box 2, a circuit board 7 and a sensor main body 10 are arranged in the sealing box 2, the wiring port 3 is used for connecting the circuit board 7 with an external cable to realize signal transmission, a probe 9 is arranged on the main body 10, a jack 11 communicated with the inside of the sealing box 2 is radially arranged on the pipeline 1, the probe 9 extends into the pipeline 1 through the jack 11, a reinforcing groove 21 is axially arranged on the side wall of the jack 11, both ends of the reinforcing groove 21 are communicated with the outside to form a through groove, the side of the probe 9 is inserted into a reinforcing groove 21, the reinforcing groove 21 reinforces the probe 9, the stability of the probe 9 is improved, a convex part 19 is arranged on the inner bottom wall of the sealing box 2, the convex part 19 is positioned at an opening of the jack 11, the jack 11 penetrates through the convex part 19, an inner concave part 20 is arranged on the bottom surface of the main body 10, the convex part 19 is positioned inside the inner concave part 20, a sealing ring is arranged between the outer peripheral surface of the convex part 19 and the inner peripheral surface of the inner concave part 20, not only can the mutual limiting effect be realized between the convex part 19 and the inner concave part 20, the stability of the fixing of the main body 10 is improved, but also the sealing effect can be realized by the sealing ring arranged between the convex part and the inner concave part, the length of the part of the probe 9 positioned inside the pipeline 1 is 1/4 of the inner diameter of the pipeline 1 at the probe 9, the circuit board 7 and the main body 10 are detachably connected inside the sealing box 2 through a fixing part, and the inner diameter of the middle part of the pipeline 1 is smaller than the inner diameters of the two ends, the probe 9 is positioned in the middle of the pipeline 1, and the liquid flow velocity at the probe 9 can be accelerated by the mode, so that the detection precision of the probe 9 is improved.

During the use, urea liquid passes through inside the pipeline 1, through the pressure of probe 9 detection liquid, pressure signal handles the back output through circuit board 7, and then realize the detection to urea hydraulic pressure, through reducing the length that probe 9 inserted the inside part of pipeline 1, can reduce the resistance of probe 9 to liquid, link up around the pipeline 1 is inside simultaneously, the resistance that liquid flow received has further been reduced, and reduce the remaining probability of liquid in the pipeline inside, reduce the probability that pipeline 1 takes place to block up, promote the stability that pressure sensor used.

When the circuit board 7 or the sensor main body 10 breaks down, the sensor main body 10 needs to be overhauled, and in order to improve the convenience of overhauling, as shown in fig. 2, the fixing part comprises a reinforcing plate 8, the bottom surface of the reinforcing plate 8 is abutted to the main body 10, the circuit board 7 is fixed on the top surface of the reinforcing plate 8 through screws, two side edges of the reinforcing plate 8 are provided with bending pieces 16 in an integrated manner, positioning blocks 15 are arranged on the bending pieces 16, positioning grooves 14 matched with the positioning blocks 15 are formed in the inner side wall of the sealing box 2, the positioning blocks 15 are arranged inside the positioning grooves 14, positioning columns 17 are fixed on the bottom surface of the reinforcing plate 8, positioning blind holes 18 matched with the positioning columns 17 are formed in the inner bottom wall of the sealing box 2, the positioning columns 17 are inserted into the positioning blind holes 18, and connected with the positioning blind holes 18 in an inserted manner, so that the positioning of the main body 10 can be realized, and the firmness of the installation of the sensor main body 10 is improved.

When overhauing pressure sensor, can realize the dismouting of circuit board 7 through the elasticity screw, when dismantling gusset plate 8, inwards overturn and bend piece 16, make locating piece 15 break away from constant head tank 14 is inside, can take off gusset plate 8 this moment, later can take out main part 10, during the installation, main part 10 is at first put into seal box 2, later put into gusset plate 8, make locating piece 15 card go into in the constant head tank 14, the realization is fixed gusset plate 8, fix main part 10 through gusset plate 8, main part 10 has been realized, gusset plate 8 and circuit board 7's installation is fixed, the convenient degree of pressure sensor maintenance has been promoted greatly through above mode.

Seal box 2 plays the guard action, its sealing performance is crucial, therefore as shown in fig. 3, 4, one side that seal box 2 deviates from pipeline 1 is provided with the opening, the opening part is provided with sealed lid 4, sealed lid 4 sets up in the open-ended inboard, can promote the stability of sealed lid 4 installation, inserting groove 13 has been seted up to 2 open-ended border departments of seal box circumference, the border of sealed lid 4 forms annular grafting strip 12 to one side bending, grafting strip 12 pegs graft in inserting groove 13, be provided with a plurality of butt portions 6 on the sealed lid 4, each butt portion 6 all with seal box 2's inside wall butt.

The grafting strip 12 is connected the shape with inserting groove 13 and is formed sealedly, has promoted the sealed effect between sealed lid 4 and the seal box 2, informs butt portion 6 butt on 2 inner walls of seal box, can realize the support to sealed lid 4, promotes the stability of sealed lid 4, through the setting of sealed lid 4, has promoted the convenient degree that seal box 2 opened, has promoted the convenient degree that pressure sensor maintained.

It is to be understood that the present invention has been described with reference to certain embodiments and that various changes or equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention as defined by the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims

1. The utility model provides a pressure sensor, includes pipeline (1), pipeline (1) middle part is provided with seal box (2), the side of seal box (2) is provided with wiring mouth (3), the port department of wiring mouth (3) is provided with sealing plug (22), be provided with circuit board (7) and sensor main part (10) in seal box (2), on pipeline (1) along radially seted up with jack (11) of seal box (2) inside intercommunication, probe (9) of main part (10) run through jack (11) extend to inside pipeline (1), its characterized in that:

the main body (10) is connected with the jack (11) in a sealing mode, the part of the length, located inside the pipeline (1), of the probe (9) is 1/3-1/4 of the inner diameter of the pipeline at the position of the probe (9), and the circuit board (7) and the main body (10) are detachably connected inside the sealing box (2) through fixing pieces.

2. The pressure sensor according to claim 1, wherein a protrusion (19) is provided on an inner bottom wall of the seal box (2), the protrusion (19) is located at an opening of the insertion hole (11), the insertion hole (11) penetrates through the protrusion (19), an inner recess (20) is provided on a bottom surface of the main body (10), the protrusion (19) is located inside the inner recess (20), and a seal ring is provided between an outer circumferential surface of the protrusion (19) and an inner circumferential surface of the inner recess (20).

3. The pressure sensor according to claim 1, wherein a reinforcing groove (21) is axially formed in the side wall of the insertion hole (11), both ends of the reinforcing groove (21) are communicated with the outside to form a through groove, and the side edge of the probe (9) is inserted into the reinforcing groove (21).

4. A pressure sensor according to claim 1, wherein the outer surface of the pipe (1) is provided with a plurality of reinforcing strips (5) circumferentially around its axis, each reinforcing strip (5) being arranged axially along the pipe (1).

5. The pressure sensor according to claim 1, wherein the fixing member comprises a reinforcing plate (8), a bottom surface of the reinforcing plate (8) abuts against the main body (10), the circuit board (7) is fixed on a top surface of the reinforcing plate (8) through screws, two side edges of the reinforcing plate (8) are provided with bending pieces (16), positioning blocks (15) are arranged on the bending pieces (16), positioning grooves (14) matched with the positioning blocks (15) are formed in an inner side wall of the sealing box (2), and the positioning blocks (15) are arranged inside the positioning grooves (14).

6. The pressure sensor according to claim 5, wherein a positioning column (17) is fixed on the bottom surface of the reinforcing plate (8), a positioning blind hole (18) matched with the positioning column (17) is formed in the inner bottom wall of the sealing box (2), and the positioning column (17) is inserted into the positioning blind hole (18).

7. Pressure sensor according to claim 1, characterized in that the side of the sealing box (2) facing away from the pipe (1) is provided with an opening, which opening is provided with a sealing cover (4), which sealing cover (4) is arranged inside the opening.

8. The pressure sensor according to claim 7, wherein an insertion groove (13) is formed in the opening edge of the sealing box (2) in the circumferential direction, the edge of the sealing cover (4) is bent towards one side to form an annular insertion strip (12), and the insertion strip (12) is inserted into the insertion groove (13).

9. The pressure sensor according to claim 8, characterized in that the sealing cover (4) is provided with a plurality of abutment portions (6), each abutment portion (6) abutting against an inner side wall of the sealing cartridge (2).

10. A pressure sensor according to claim 1, characterized in that the inner diameter of the pipe (1) is smaller in the middle than at both ends.