Air pressure detection device

Abstract

The utility model discloses an air pressure detection device, which comprises a shell, a pressure chip and a transmission wire harness, one side of the shell is provided with a cavity, the pressure chip is arranged in the cavity, one end of the transmission wire harness is connected with the pressure chip, the other end of the transmission wire harness extends towards the outside of the cavity, and the pressure chip is arranged in the cavity. The other side of the shell is provided with an installation part used for being connected with a brake system air pipeline. According to the air pressure detection device of the utility model, the pressure chip is arranged in the housing, external transmission is realized through the transmission wire harness, the housing forms the installation part which can be rapidly installed with the air pipeline, the communication between the pressure chip and the air pipeline is realized through the air channel to detect the air pressure, and the detection device has reliable installation adaptability through the general connection interface form of the installation part. And the outer part of the shell forms effective sand and stone impact resistance, so that stable connection between the detection device and the air pipeline is ensured, and the precision of air pressure detection is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors and relates to an air pressure detection device. Background Art

[0002] A trailer is a vehicle towed by a car but without its own power drive device. It is a combination of a car (truck or tractor, forklift) and one or more trailers. It has no power, carries loads independently, and relies on other vehicles to tow it for travel.

[0003] The trailer brake system is very important to the safety performance of the trailer. In order to quickly obtain operational fault information of the brake system, monitoring the air pressure in the brake system's air pipeline is one of the more effective means. Sensors are commonly used tools to detect air pressure. The trailer brake system circuit is complex and is easily affected by strong impacts from sand and stones during driving. Existing sensors are not well adapted to the trailer brake system and are prone to failure. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an air pressure detection device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pneumatic pressure detection device comprises a shell, a pressure chip and a transmission harness. A cavity is provided on one side of the shell, the pressure chip is arranged in the cavity, one end of the transmission harness is connected to the pressure chip, and the other end extends outside the cavity. A mounting portion for connecting to the brake system air pipeline is provided on the other side of the shell, and an air channel connecting the air pipeline and the cavity is formed in the mounting portion.

[0007] Furthermore, it also includes a connecting flange, one end of which is provided with a connecting portion for connecting to the brake system air tank, a through hole is provided in the connecting flange, and a mounting hole for connecting the mounting portion is provided on the connecting flange, and the through hole connects the air tank and the mounting hole.

[0008] Furthermore, a water level of a set height is set in the gas storage tank, the connecting flange is set at the bottom of the gas storage tank, and one end of the through hole is connected to the bottom of the connecting flange and is provided with a drain valve joint.

[0009] Furthermore, the airway is inclined upward relative to a horizontal plane to form a set angle.

[0010] Furthermore, the connecting portion is threadedly connected to the gas tank, and the outer periphery of the connecting flange is configured as a polygonal structure.

[0011] Further, the cavity forms an opening on one side of the housing, and potting glue is filled in the cavity to seal the opening.

[0012] Further, the housing is made of metal.

[0013] In summary, the advantages of the present utility model are as follows:

[0014] For the air pressure detection device of the present utility model, a pressure chip is arranged inside the housing, external transmission is realized through a transmission wire harness, the housing forms an installation part for quick installation with an air pipeline, the air pressure is detected by connecting the pressure chip and the air pipeline through an air passage, and the universal connection interface form of the installation part enables the detection device to have reliable installation adaptability, can be quickly set up for convenient later maintenance, an effective anti-sand and stone impact is formed outside the housing to ensure the stable connection between the detection device and the air pipeline, and the accuracy of air pressure detection is guaranteed. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the air pressure detection device.

[0016] Figure 2 is Figure 1 the sectional structural diagram in

[0017] Figure 3 It is a schematic structural diagram of the connection flange of the air pressure detection device.

[0018] Figure 4 is Figure 3 the schematic structural diagram of the air pressure detection device connecting to the gas storage tank in

[0019] Reference numerals in the figures: 1. Housing; 11. Cavity; 12. Installation part; 13. Air passage; 2. Pressure chip; 3. Transmission wire harness; 4. Connection flange; 41. Connection part; 42. Through hole; 43. Drain valve joint; 44. Installation hole; 5. Gas storage tank; 51. Water level. Detailed Embodiments

[0020] The following specific examples illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0021] It should be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0022] In all the directional indications (such as up, down, left, right, front, back, horizontal, vertical...) in the embodiments of the present invention, they are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, then the directional indications will also change accordingly.

[0023] Due to reasons such as installation errors, the parallel relationship referred to in the embodiments of the present invention may actually be an approximate parallel relationship, and the vertical relationship may actually be an approximate vertical relationship.

[0024] The present invention provides a pneumatic pressure detection device, which is mainly used for detecting the air pressure in the air pipeline of the trailer braking system. Referring to Figure 1 and Figure 2 , the pneumatic pressure detection device includes a housing 1, a pressure chip 2, and a transmission wire harness 3. The housing 1 has a cylindrical structure, and a cavity 11 is communicatively provided at one end in the axial direction of the housing 1. The pressure chip 2 is disposed in the cavity 11. One end of the transmission wire harness 3 is connected to the pressure chip 2, and the other end is led out and connected to a terminal.

[0025] The housing 1 is preferably made of a metal material, which effectively resists the impact of sand and stones and protects the internal pressure chip 2.

[0026] After the pressure chip 2 and the transmission wire harness 3 are provided, the cavity 11 is further filled with potting glue for sealing.

[0027] An installation portion 12 is provided at the other end in the axial direction of the housing 1. The installation portion 12 can be set as a threaded structure for effectively connecting with a valve core or the like provided on the air pipeline. An air passage 13 is provided in the installation portion 12. One end of the air passage 13 communicates with the inside of the air pipeline, and the other end communicates with the cavity 11 and is directly opposite to the detection port of the pressure chip 2, so that the pressure chip 2 can quickly and sensitively detect the air pressure in the air path.

[0028] In some embodiments, due to the installation position requirements of the air pipeline of the braking system, the pneumatic pressure detection device needs to be connected to an air storage tank 5 in the air pipeline. Specifically, referring to Figure 3 and Figure 4, the air pressure detection device further includes a connecting flange 4. One end of the connecting flange 4 forms a connecting portion 41. Threads can be provided on the outer periphery of the connecting portion 41 for connecting with a threaded hole provided at the bottom of the gas storage tank 5. The outer periphery of the connecting flange 4 can be set as a polygonal structure to facilitate the installation on the gas storage tank 5. A through hole 42 is provided inside the connecting flange 4. One end of the through hole 42 forms an opening at the end of the connecting portion 41. After the connecting portion 41 is installed with the gas storage tank 5, the through hole 42 is communicated with the inside of the gas storage tank 5.

[0029] An installation hole 44 is provided on one side of the outer periphery of the connecting flange 4 for the installation portion 12 to be installed on the connecting flange 4. The installation portion 12 is inserted and fixed in the installation hole 44 so that the air passage 13 is communicated with the through hole 42. The air pressure in the gas storage tank 5 is synchronously reflected on the pressure chip 2 through the through hole 42 and the air passage 13 to realize the detection of the air pressure.

[0030] In some embodiments, in order to balance the pressure for detection, a water level 51 with a set height is provided at the bottom of the gas storage tank 5. The other end of the through hole 42 is communicated with the other end of the connecting flange 4 to form a drain valve joint 43, so that the water in the gas storage tank 5 can fill into the through hole 42. Further, when the outer shell 1 is in the installation hole 44, the axis of the outer shell 1 is inclined upward relative to the horizontal plane to form a set angle, and the set angle is in the range greater than 0 and less than 90, so that the air passage 13 is in an inclined posture. The water in the through hole 42 enters along the bottom opening of the air passage 13 to form a water stop line in the air passage 13, so that a certain air column remains in the air passage 13. While preventing water from invading the pressure chip 2, the accuracy of the air pressure detection value is ensured.

[0031] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A barometric pressure detection device, characterized in that, It includes a housing (1), a pressure chip (2) and a transmission wire harness (3). One side of the housing (1) is provided with a cavity (11). The pressure chip (2) is arranged in the cavity (11). One end of the transmission wire harness (3) is connected to the pressure chip (2), and the other end extends out of the cavity (11). The other side of the housing (1) is provided with a mounting part (12) for connecting to the brake system air pipeline. An air passage (13) communicating with the air pipeline and the cavity (11) is formed in the mounting part (12).

2. The air pressure detection device according to claim 1, wherein It further includes a connecting flange (4). One end of the connecting flange (4) is provided with a connecting part (41) for connecting to the brake system air storage tank (5). A through hole (42) is arranged in the connecting flange (4). Mounting holes (44) for connecting to the mounting part (12) are arranged on the connecting flange (4). The through hole (42) communicates the air storage tank (5) and the mounting holes (44).

3. An air pressure detection device according to claim 2, characterized in that, A water level (51) with a set height is arranged in the air storage tank (5). The connecting flange (4) is arranged at the bottom of the air storage tank (5). A drain valve joint (43) is arranged at one end of the through hole (42) communicating with the bottom of the connecting flange (4).

4. The air pressure detection device according to claim 3, wherein The air passage (13) is inclined upward relative to the horizontal plane to form a set angle.

5. The air pressure detection device according to claim 2, characterized in that, The connecting part (41) is threadedly connected to the air storage tank (5). The outer periphery of the connecting flange (4) is set as a polygonal structure.

6. The air pressure detection device according to claim 1, characterized in that, The cavity (11) forms an opening on one side of the housing (1). The opening is closed by filling potting glue in the cavity (11).

7. The air pressure detection device according to claim 1, characterized in that, The housing (1) is made of metal material.

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