Differential pressure tail gas detection pressure sensor

Abstract

The utility model relates to the technical field of tail gas detection, and discloses a differential pressure tail gas detection pressure sensor which comprises a shell, an external connection shell is arranged on the left side of the shell in a penetrating mode, two sets of pressure pipelines are vertically arranged at the top end of the shell in a penetrating mode, and a powerful diamagnetic anti-interference assembly is arranged in the external connection shell. The anti-interference assembly comprises an anti-interference magnetic ring, and a partition plate is vertically and fixedly connected to the interior of the external shell. According to the differential pressure tail gas detection pressure sensor, the positioning rod, the fixing plate, the sealing outer plate, the anti-interference magnetic rings and the partition plate are arranged, the powerful anti-interference effect is achieved, the fixity of the multiple sets of anti-interference magnetic rings is ensured, the anti-interference magnetic rings are prevented from sliding downwards, and the anti-interference effect is reduced; the problems that a differential pressure sensor is prone to being interfered by a strong electromagnetic field of an external environment, detection data are affected, the sensor needs repeated detection to obtain a detection result, and the detection efficiency is greatly reduced are solved.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas detection technology, specifically a differential pressure exhaust gas detection pressure sensor. Background Technology

[0002] The core purpose of exhaust emission testing is to measure the pollutants emitted by vehicles, determine whether they meet environmental protection standards, thereby assessing the degree of pollution caused by vehicles, ensuring road safety and air quality, and preventing environmental pollution.

[0003] A differential pressure sensor is a sensor that can measure pressure differences. It is used to measure the pressure difference of exhaust gas in the front and rear channels of an engine exhaust particulate filter. Currently used differential pressure sensors are easily affected by strong electromagnetic fields in the external environment, which affects the detection data and requires repeated detection to obtain the detection result, greatly reducing the detection efficiency.

[0004] Therefore, a novel differential pressure exhaust gas detection pressure sensor is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a differential pressure exhaust gas detection pressure sensor to solve the problem mentioned in the background art that differential pressure sensors are easily affected by strong electromagnetic fields in the external environment, which affects the detection data and requires repeated detection to obtain the detection result, greatly reducing the detection efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a differential pressure exhaust gas detection pressure sensor, including a housing, an outer shell through which an outer shell is disposed on the left side of the housing, two sets of pressure pipes through which an outer shell is disposed vertically on the top of the housing, and a strong anti-magnetic anti-interference component is disposed inside the outer shell.

[0007] The anti-interference component includes an anti-interference magnetic ring. A partition is vertically fixedly connected inside the outer shell. A sealing outer plate is fixedly connected to the outside of the partition. Two sets of fixing plates are horizontally fixedly connected between the side wall of the sealing outer plate and the left side wall inside the outer shell. The two sets of fixing plates are located at the top and bottom of the outer shell, respectively. Two sets of positioning rods are vertically arranged inside the outer shell. The top and bottom of the two sets of positioning rods are respectively sleeved and fixed outside the two sets of fixing plates. Multiple sets of anti-interference magnetic rings are provided and are sleeved and fixed outside the two sets of positioning rods at equal intervals.

[0008] As a further technical solution of this utility model, the two ends of the sealing outer plate are fixedly connected to the top and bottom ends of the outer shell respectively. The interior of the shell is divided into two sets of interconnected chambers, and the bottom of one set of pressure pipes is connected to one chamber.

[0009] As a further technical solution of this utility model, a sealing door is fixedly connected to the front end of the housing, two sets of side connecting plates are fixedly connected to the right side of the sealing door, and two sets of main connecting plates are fixedly connected to the bottom end of the sealing door. Guide holes are provided through the interior of the main connecting plates and the side connecting plates, and fastening bolts are provided through the interior of the guide holes. The rear ends of the fastening bolts all penetrate the interior of the housing.

[0010] As a further technical solution of this utility model, a knob is fixedly connected to the front end of the fastening bolt, and the inner wall of the guide hole is spirally threaded, with the external thread of the fastening bolt matching the thread of the inner wall of the guide hole.

[0011] As a further technical solution of this utility model, a metal plate is vertically arranged on the right side inside the outer shell, and a sensor body is fixedly connected to the top and bottom of the right side of the partition. A limiting sleeve is fixedly connected to the top and bottom of the outer shell, and positioning rings are symmetrically arranged on both sides of the limiting sleeve. The outer end of the positioning ring is fixedly connected to the inner wall of the outer shell.

[0012] As a further technical solution of this utility model, a detection head is fixedly connected to the top and bottom of the outer side of the metal plate. A connecting line is provided between the detection head and the sensor body. The connecting line passes through the interior of the positioning ring and the limiting sleeve in sequence. Multiple sets of sliders are fixedly connected to the outer end of the connecting line. Multiple sets of inner sliding grooves are opened on the inner wall of the limiting sleeve.

[0013] As a further technical solution of this utility model, the slider corresponds one-to-one with the inner groove, and the slider is slidably connected inside the inner groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the differential pressure exhaust gas detection pressure sensor not only realizes the anti-interference function and the easy installation function, but also realizes the limit protection function;

[0015] (1) By setting up positioning rods, fixing plates, sealing outer plates, anti-interference magnetic rings and partitions, multiple sets of anti-interference magnetic rings are equally spaced and fixed on the outside of two sets of positioning rods, which plays a strong anti-interference role and ensures the fixation of multiple sets of anti-interference magnetic rings themselves, preventing the anti-interference magnetic rings from sliding down and reducing the anti-interference effect. The sealing outer plate and partitions cooperate with each other to separate a sealed space inside the outer shell, which can prevent foreign objects from entering while not affecting the test data, and provide a safe operating test environment.

[0016] (2) By setting a sealing door, side connecting plate, main connecting plate, guide hole and fastening bolt, two sets of main connecting plates and two sets of side connecting plates are fixed to the side wall and bottom of the sealing door respectively. By utilizing the thread direction of the inner wall of the guide hole, it is ensured that the fastening bolt quickly penetrates the interior of the main connecting plate and the side connecting plate and moves into the interior of the housing, which facilitates the installation of the housing, realizes the fixation in different positions, strengthens the firmness of the housing during use, and prevents loosening due to vibration and other reasons during operation;

[0017] (3) By setting a limiting sleeve, a positioning ring, a connecting line, a slider and an inner groove, the connecting line is slidably installed in the corresponding inner groove by multiple sets of sliders fixed at the outer end. The limiting sleeve and two sets of positioning rings can limit and protect the outer end of the connecting line, prevent the connecting line from falling and causing damage, extend the service life of the connecting line, reduce the friction of the connecting line surface, and prevent the connecting line surface from being severely worn. Attached Figure Description

[0018] Figure 1 This is a front view cross-sectional structural diagram of the present invention;

[0019] Figure 2 This is a bottom view of the fixing plate structure of this utility model;

[0020] Figure 3 This is a top view of the pressure pipeline structure of this utility model;

[0021] Figure 4 This is a side view of the limiting sleeve structure of this utility model.

[0022] In the diagram: 1. Outer shell; 2. Anti-interference magnetic ring; 3. Positioning rod; 4. Sealing outer plate; 5. Partition plate; 6. Sensor body; 7. Limiting sleeve; 8. Positioning ring; 9. Pressure pipeline; 10. Housing; 11. Sealing door; 12. Side connecting plate; 13. Knob; 14. Main connecting plate; 15. Guide hole; 16. Metal plate; 17. Detection head; 18. Fixing plate; 19. Fastening bolt; 20. Inner groove; 21. Connecting wire; 22. Slider. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4A differential pressure exhaust gas detection pressure sensor includes a housing 10, an outer shell 1 extending through the left side of the housing 10, two sets of pressure pipes 9 extending vertically through the top of the housing 10, and a strong anti-magnetic anti-interference component installed inside the outer shell 1.

[0025] The anti-interference component includes an anti-interference magnetic ring 2. A partition 5 is vertically fixedly connected inside the outer shell 1. A sealing outer plate 4 is fixedly connected to the outside of the partition 5. Two sets of fixing plates 18 are horizontally fixedly connected between the side wall of the sealing outer plate 4 and the left side wall inside the outer shell 1. The two sets of fixing plates 18 are located at the top and bottom of the outer shell 1, respectively. Two sets of positioning rods 3 are vertically arranged inside the outer shell 1. The top and bottom of the two sets of positioning rods 3 are respectively sleeved and fixed to the outside of the two sets of fixing plates 18. Multiple sets of anti-interference magnetic rings 2 are provided and are sleeved and fixed to the outside of the two sets of positioning rods 3 at equal intervals.

[0026] The two ends of the sealing outer plate 4 are fixedly connected to the top and bottom of the inner shell 1, respectively. The interior of the shell 10 is divided into two sets of interconnected chambers, and the bottom of one set of pressure pipes 9 is connected to one chamber.

[0027] Specifically, such as Figure 1 and Figure 2 As shown, during use, several sets of anti-interference magnetic rings 2 are equally spaced and fixed to the outside of two sets of positioning rods 3, which plays a strong anti-interference role and ensures the fixation of the multiple sets of anti-interference magnetic rings 2 themselves, preventing the anti-interference magnetic rings 2 from sliding down and reducing the anti-interference effect. The sealing outer plate 4 and the partition plate 5 cooperate with each other to separate a sealed space inside the outer shell 1, which can prevent foreign objects from entering without affecting the detection data, and provide a safe operating detection environment.

[0028] A sealing door 11 is fixedly connected to the front end of the housing 10. Two sets of side connecting plates 12 are fixedly connected to the right side of the sealing door 11. Two sets of main connecting plates 14 are fixedly connected to the bottom end of the sealing door 11. Guide holes 15 are provided through the interior of both the main connecting plates 14 and the side connecting plates 12. Fastening bolts 19 are provided through the interior of the guide holes 15. The rear ends of the fastening bolts 19 are all through the interior of the housing 10.

[0029] A knob 13 is fixedly connected to the front end of the fastening bolt 19, and the inner wall of the guide hole 15 is spirally threaded. The external thread of the fastening bolt 19 matches the thread on the inner wall of the guide hole 15.

[0030] Specifically, such as Figure 1 and Figure 3 As shown, when in use, rotating the knob 13 in sequence will cause the fastening bolt 19 to move backward, and according to the thread direction of the inner wall of the guide hole 15, it will move through the interior of the main connecting plate 12, the side connecting plate 14 and the housing 10, and fix the housing 10 in a suitable position for use.

[0031] A metal plate 16 is vertically arranged on the right side inside the outer shell 1. The top and bottom of the right side of the partition 5 are fixedly connected to the sensor body 6. The top and bottom of the outer shell 1 are fixedly connected to the limiting sleeve 7. The two sides of the limiting sleeve 7 are symmetrically arranged with positioning rings 8. The outer end of the positioning ring 8 is fixedly connected to the inner wall of the outer shell 1.

[0032] The top and bottom of the outer side of the metal plate 16 are fixedly connected to the detection head 17. A connecting line 21 is provided between the detection head 17 and the sensor body 6. The connecting line 21 passes through the interior of the positioning ring 8 and the limiting sleeve 7 in sequence. Multiple sets of sliders 22 are fixedly connected to the outer end of the connecting line 21. Multiple sets of inner grooves 20 are opened on the inner wall of the limiting sleeve 7.

[0033] The slider 22 corresponds one-to-one with the inner slide groove 20, and the slider 22 is slidably connected inside the inner slide groove 20;

[0034] Specifically, such as Figure 1 and Figure 4 As shown, during use, the connecting wire 21 is slidably installed in the corresponding inner groove 20 by multiple sets of sliders 22 fixed at the outer end. The limiting sleeve 7 and two sets of positioning rings 8 can limit and protect the outer end of the connecting wire 21, prevent the connecting wire 21 from falling and being damaged, extend the service life of the connecting wire 21, and reduce the friction on the surface of the connecting wire 21 to prevent severe wear on the surface of the connecting wire 21.

[0035] Working principle: In use, the exhaust gas enters the two chambers inside the housing 10 through two sets of pressure pipes 9 and is pressurized. When subjected to pressure, the metal plate 16 will produce a small displacement, the size of which is proportional to the pressure. After detection by the detection head 17, these displacements are converted into electrical signals through the connecting line 21, and then amplified and processed to finally output a signal corresponding to the pressure difference. Several sets of anti-interference magnetic rings 2 are equally spaced and fixed to the outside of the two sets of positioning rods 3, which plays a strong anti-interference role and ensures the fixation of the multiple sets of anti-interference magnetic rings 2 themselves, preventing the anti-interference magnetic rings 2 from sliding down and reducing the anti-interference effect. The sealing outer plate 4 and the partition plate 5 cooperate with each other to separate the interior of the outer housing 1 into a sealed space, which does not affect the detection data and prevents foreign objects from entering, providing a safe operating and detection environment.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A differential pressure exhaust gas detection pressure sensor, comprising a housing (10), characterized in that: An outer shell (1) is provided through the left side of the housing (10), and two sets of pressure pipes (9) are provided through the top of the housing (10). A strong anti-magnetic anti-interference component is provided inside the outer shell (1). The anti-interference component includes an anti-interference magnetic ring (2). A partition (5) is vertically fixed inside the outer shell (1). A sealing outer plate (4) is fixedly connected to the outside of the partition (5). Two sets of fixing plates (18) are horizontally fixed between the side wall of the sealing outer plate (4) and the left side wall inside the outer shell (1). The two sets of fixing plates (18) are located at the top and bottom of the outer shell (1), respectively. Two sets of positioning rods (3) are vertically arranged inside the outer shell (1). The top and bottom of the two sets of positioning rods (3) are respectively sleeved and fixed outside the two sets of fixing plates (18). Multiple sets of anti-interference magnetic rings (2) are provided and are sleeved and fixed outside the two sets of positioning rods (3) at equal intervals.

2. The differential pressure exhaust gas detection pressure sensor according to claim 1, characterized in that: The two ends of the sealing outer plate (4) are fixedly connected to the top and bottom of the outer shell (1) respectively. The interior of the shell (10) is divided into two sets of interconnected chambers, and the bottom of a set of pressure pipes (9) is connected to one chamber.

3. The differential pressure exhaust gas detection pressure sensor according to claim 1, characterized in that: A sealing door (11) is fixedly connected to the front end of the housing (10). Two sets of side connecting plates (12) are fixedly connected to the right side of the sealing door (11). Two sets of main connecting plates (14) are fixedly connected to the bottom end of the sealing door (11). Guide holes (15) are provided through the interior of both the main connecting plate (14) and the side connecting plate (12). Fastening bolts (19) are provided through the interior of the guide holes (15). The rear ends of the fastening bolts (19) are all through the interior of the housing (10).

4. A differential pressure exhaust gas detection pressure sensor according to claim 3, characterized in that: The front end of the fastening bolt (19) is fixedly connected to a knob (13), and the inner wall of the guide hole (15) is spirally threaded. The thread on the outside of the fastening bolt (19) matches the thread on the inner wall of the guide hole (15).

5. A differential pressure exhaust gas detection pressure sensor according to claim 1, characterized in that: A metal plate (16) is vertically arranged on the right side inside the outer shell (1). A sensor body (6) is fixedly connected to the top and bottom of the right side of the partition (5). A limiting sleeve (7) is fixedly connected to the top and bottom of the outer shell (1). A positioning ring (8) is symmetrically arranged on both sides of the limiting sleeve (7). The outer end of the positioning ring (8) is fixedly connected to the inner wall of the outer shell (1).

6. A differential pressure exhaust gas detection pressure sensor according to claim 5, characterized in that: The top and bottom of the outer side of the metal plate (16) are fixedly connected to a detection head (17). A connecting line (21) is provided between the detection head (17) and the sensor body (6). The connecting line (21) passes through the interior of the positioning ring (8) and the limiting sleeve (7) in sequence. Multiple sets of sliders (22) are fixedly connected to the outer end of the connecting line (21). Multiple sets of inner grooves (20) are opened on the inner wall of the limiting sleeve (7).

7. A differential pressure exhaust gas detection pressure sensor according to claim 6, characterized in that: The slider (22) corresponds one-to-one with the inner groove (20), and the slider (22) is slidably connected inside the inner groove (20).

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