CN214668260U

CN214668260U - Pressure measuring device

Info

Publication number: CN214668260U
Application number: CN202120811719.9U
Authority: CN
Inventors: 钱运东; 何佳林; 李胜男; 陈晓阳; 郭利升
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-11-09
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses a pressure measurement device relates to engine spare part technical field. The pressure measuring device comprises a mounting seat and two measuring components. The measuring component comprises a pressure sensor and a joint, the pressure sensor comprises a body and a pressure taking end, the body is fixedly arranged at the top of the mounting seat, the pressure taking end stretches into the mounting seat, the joint is tubular and comprises a mounting end and a connecting end, the mounting end vertically stretches into the bottom of the mounting seat and is communicated with the pressure taking end, and the pipe orifice of the mounting end faces the pressure taking end. The pressure measuring device can simultaneously detect the pressure in the air inlet pipe and the air outlet pipe, and no dead zone exists in the air flow channel.

Description

Pressure measuring device

Technical Field

The utility model relates to an engine parts technical field especially relates to a pressure measurement device.

Background

With the increasing awareness of environmental protection, the emission requirements of engines are becoming more and more stringent. To the engine that adopts closed crankcase ventilation system, in order to satisfy the emission requirement, need monitor whether the ventilation pipeline of engine closed crankcase ventilation system pine takes off, ftractures.

The existing detection device can only be provided with one sensor, so that the pressure measurement can be carried out on only one pipeline in the air inlet pipe and the air outlet pipe, and for the whole crankcase ventilation system, the air inlet pipeline and the air outlet pipeline of the oil-gas separator need two similar devices, so that the complexity of the whole arrangement is increased. And the joint of the detection device and the pipeline is horizontally arranged and is vertically arranged with the pressure taking end of the sensor, and an airflow channel has dead zones, so that engine oil and water are easily accumulated to block the channel, and the measurement result is influenced.

In view of the above problems, it is desirable to develop a pressure measurement device to solve the problem that the existing detection device cannot simultaneously detect the pressures in the inlet and outlet air pipes and the dead zone of the air flow channel.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressure measurement device can detect pressure and airflow channel in the inlet duct, the outlet duct simultaneously and do not have the blind spot.

To achieve the purpose, the utility model adopts the following technical proposal:

a pressure measurement device, comprising:

a mounting seat;

two measuring component, measuring component includes pressure sensor and joint, pressure sensor includes the body and gets the pressure end, the body is fixed set up in the top of mount pad, get the pressure end and stretch into the mount pad, the joint is the tubulose, connect including installation end and link, the installation end is vertical to be stretched into the bottom of mount pad and with get the pressure end intercommunication, the mouth of pipe orientation of installation end get the pressure end.

Preferably, an inwardly inclined conical surface is provided at the nozzle of the mounting end of the joint.

Preferably, the pressure measuring device further comprises a sealing ring, and the sealing ring is arranged between the pressure measuring end and the mounting seat.

Preferably, one side of the body, which is close to the mounting seat, is provided with a pressure balance hole, and the mounting seat is located at the pressure balance hole and is provided with an avoiding pit.

Preferably, each said measuring assembly further comprises a fastening screw, said body including a mounting portion through which said body is secured to said mounting seat by said fastening screw.

Preferably, the mounting seat comprises two mounting surfaces with different heights, and the two pressure sensors are respectively fixed on one of the mounting surfaces.

Preferably, the included angle between the mounting surface and the axial direction of the joint is 75-90 degrees.

Preferably, the mounting seat is provided with two mounting holes, and the mounting holes are used for fixing the mounting seat.

Preferably, the mounting end is provided with threads, and the mounting end is in threaded connection with the mounting seat.

Preferably, the mounting structure further comprises a sealing gasket, wherein the mounting end is provided with a resisting part, and the sealing gasket is arranged between the resisting part and the mounting seat and is pressed by the resisting part and the mounting seat.

The utility model has the advantages that:

the utility model provides a pressure measuring device. In the pressure measuring device, two connectors are respectively connected with the air inlet pipe and the air outlet pipe of the crankcase ventilation system, so that gas in the connectors acts on the pressure taking end of the pressure sensor, and the gas pressure in the air inlet pipe and the air outlet pipe is read. The device middle joint and pressure sensor set up respectively in the top and the bottom of mount pad, make airflow channel smooth and easy, do not have the blind spot, and the machine oil and the water that store up in the airflow channel can discharge through the joint of vertical setting moreover, can not block up the passageway, have guaranteed measuring result's accuracy.

Drawings

Fig. 1 is a schematic structural diagram of a pressure measurement device provided by the present invention;

fig. 2 is an exploded view of the pressure measuring device provided by the present invention;

fig. 3 is a cross-sectional view of a pressure measurement device provided by the present invention;

fig. 4 is a schematic structural diagram of the pressure sensor provided by the present invention.

In the figure:

1. a mounting seat; 2. a measurement assembly; 3. fastening screws;

21. a pressure sensor; 22. a joint;

11. avoiding the pits; 12. mounting holes; 211. a body; 212. a pressure measuring end; 213. an installation part; 214. a seal ring; 215. a pressure balance hole; 216. a plug end; 221. an installation end; 222. a connecting end;

2211. a conical surface.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The present embodiment provides a pressure measurement device. As shown in fig. 1 and 2, the pressure measuring device includes a mounting base 1 and two measuring units 2. Measuring component 2 includes pressure sensor 21 and connects 22, and pressure sensor 21 includes body 211 and pressure taking end 212, and body 211 is fixed to be set up in the top of mount pad 1, and pressure taking end 212 stretches into mount pad 1, and it is the tubulose to connect 22, and joint 22 includes installation end 221 and link 222, and installation end 221 is vertical to stretch into the bottom of mount pad 1 and with pressure taking end 212 intercommunication, and the mouth of pipe of installation end 221 is towards pressure taking end 212.

The position that mount pad 1 can two fixed measuring component 2 is fixed and is fixed in the suitable position of automobile body, and the integrated level is high, practices thrift the space and does benefit to the totality and arranges, has reduced the convenient assembly of part quantity. As shown in fig. 3, since the pressure sensor 21 is disposed on the top of the mounting base 1, the joint 22 is disposed on the bottom of the mounting base 1 and is communicated with the pressure measuring end 212, an air flow channel is formed between the pressure measuring end 212 of the pressure sensor 21 and the mounting end 221 of the joint 22, and the air flow channel of the pressure measuring device is through, the air flow channel is smooth, no dead zone exists, and the air entering the joint 22 directly acts on the pressure measuring end 212, so that the measurement is more accurate. Meanwhile, the vertically arranged joint 22 can timely discharge accumulated engine oil and water out of the air flow channel, so that the channel is prevented from being blocked, and the accuracy of a measuring result is further ensured.

As shown in fig. 4, the pressure sensor 21 further includes a plug terminal 216, and the plug terminal 216 is used for connecting with the control circuit.

Preferably, the fitting 22 is provided with an inwardly inclined tapered surface 2211 at the nozzle of the mounting end 221. The tapered surface 2211 allows oil and water between the mounting portion 213 of the joint 22 and the pressure measuring end 212 of the pressure sensor 21 to flow down along the inner wall and flow into the joint 22, thereby preventing accumulation at the connection between the mounting portion 213 and the mounting seat 1.

When the pressure sensor 21 is mounted on the mounting base 1, if there is a gap between the pressure sensor 21 and the mounting base 1 to cause air leakage, the pressure of the air entering the air flow passage through the joint 22 is reduced due to the air leakage, and the reading of the pressure sensor 21 is abnormal. At this time, it is impossible to judge whether the reading abnormality of the pressure sensor 21 is caused by loosening or cracking of the ventilation pipe of the closed crankcase ventilation system of the engine. To solve this problem, the pressure measuring device further includes a sealing ring 214, and the sealing ring 214 is disposed between the pressure measuring end 212 and the mounting seat 1. The sealing ring 214 can prevent air leakage between the pressure sensor 21 and the mounting seat 1, eliminate the problem of abnormal reading of the pressure sensor 21 caused by air leakage of the components of the pressure measuring device, and improve the accuracy of the measuring result of the pressure measuring device.

Preferably, a pressure balance hole 215 is formed at one side of the body 211 close to the mounting seat 1, and an escape pit 11 is formed in the mounting seat 1 at the pressure balance hole 215.

The pressure balance hole 215 is used for detecting the external atmospheric pressure, and the detection result is compared with the value of the pressure measuring end 212 for judgment. If the ventilation pipeline of the closed crankcase ventilation system of the engine is loosened or cracked, which indicates that the ventilation pipeline is in a communication state with the outside, the numerical value of the pressure measuring end 212 is equal to the outside atmospheric pressure. In order to avoid the influence of the air flow on the detection value of the pressure balance hole 215, the pressure balance hole 215 is provided on the side close to the mount 1 for wind shielding. In order to solve the problem, the installation seat 1 is provided with the avoidance pit 11 at the position of the pressure balance hole 215, so that the surface of the installation seat 1 is not too close to the pressure balance hole 215 to block the pressure balance hole 215, the pressure balance hole 215 can be communicated with the atmosphere and is not influenced by air flow, and the measurement accuracy is improved.

The mounting base 1 includes two mounting surfaces with different heights, and the two pressure sensors 21 are respectively fixed on one of the two mounting surfaces. The two pressure sensors 21 are mounted on mounting surfaces with different heights, so that the two pressure sensors 21 do not interfere with each other, the positions of the two pressure sensors 21 can be freely designed according to the vehicle body structure when the pressure measuring device is designed, the design freedom is high, and the structure is flexible.

Preferably, the mounting face is angled 75 ° to 90 ° from the axial direction of the adapter 22. This pressure measurement device is when using, and joint 22 is vertical state, and the installation face and joint 22 have the contained angle this moment, and the installation face is the tilt state, dodges pit 11 department if there is ponding can flow smoothly, and then avoids blockking up pressure balance hole 215 on the pressure sensor 21, guarantees to measure accurately. The inclined angle of the mounting surface is not too large, otherwise, the gas in the gas flow channel cannot directly act on the pressure taking end 212, and the measurement is easy to be inaccurate.

Preferably, each measuring assembly 2 further comprises a fastening screw 3, the body 211 comprises a mounting portion 213, and the body 211 is fixed to the mounting base 1 by the fastening screw 3 through the mounting portion 213. The mounting part 213 is fixed by the fastening screw 3, so that the pressure sensor 21 is fixed on the mounting base 1, and the pressure sensor 21 is convenient for an operator to detach and maintain.

Preferably, two mounting holes 12 are provided on the mounting base 1, and the mounting holes 12 are used for fixing the mounting base 1. The mounting hole 12 may be a through hole, and is fixed to the vehicle body by a bolt. The mounting hole 12 may be a screw hole and fixed to the vehicle body by a fastening screw 3.

Preferably, the mounting end 221 is provided with threads, and the mounting end 221 is threadedly coupled with the mounting socket 1. The mounting end 221 is threaded and threadably engages the mounting base 1 to facilitate removal of the fitting 22 by an operator for cleaning the air flow passage.

The pressure measuring device further comprises a sealing gasket, the mounting end 221 is provided with a resisting portion, and the sealing gasket is arranged between the resisting portion and the mounting seat 1 and is pressed by the resisting portion and the mounting seat 1. After the installation end 221 is screwed into the installation seat 1, the blocking portion presses the sealing gasket to the installation seat 1 and gradually compresses the sealing gasket, so that the pressure measuring end 212 of the pressure sensor 21 can be prevented from being inaccurate in measurement due to air leakage between the joint 22 and the installation seat 1.

Preferably, the gasket is made of polyurethane. The polyurethane has certain elasticity, and when the blocking part and the mounting seat 1 extrude the polyurethane, the polyurethane contracts and simultaneously blocks the mounting seat 1 and the blocking part tightly, so that the sealing performance is improved. Meanwhile, the acting force of the polyurethane on the resisting part can make the joint 22 not easy to loosen from the mounting seat 1, and a certain locking effect can be achieved.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A pressure measurement device, comprising:

a mounting seat (1);

two measuring component (2), measuring component (2) include pressure sensor (21) and joint (22), pressure sensor (21) include body (211) and get and press end (212), body (211) fixed set up in the top of mount pad (1), it stretches into to get to press end (212) mount pad (1), it is the tubulose to connect (22), connect (22) including installation end (221) and link (222), installation end (221) vertically stretch into the bottom of mount pad (1) and with it communicates to get to press end (212), the mouth of pipe orientation of installation end (221) get to press end (212).

2. A pressure measuring device according to claim 1, characterized in that an inwardly inclined conical surface (2211) is provided at the mouth of the mounting end (221) of the joint (22).

3. The pressure measurement device of claim 1, further comprising a sealing ring (214), the sealing ring (214) being disposed between the pressure tapping end (212) and the mounting seat (1).

4. The pressure measuring device of claim 1, characterized in that a side of the body (211) close to the mounting seat (1) is provided with a pressure balance hole (215), and the mounting seat (1) is provided with an avoiding pit (11) at the pressure balance hole (215).

5. A pressure measuring device according to claim 1, characterized in that each measuring assembly (2) further comprises a fastening screw (3), the body (211) comprising a mounting portion (213), the body (211) being fixed to the mounting seat (1) by the fastening screw (3) through the mounting portion (213).

6. Pressure measuring device according to claim 1, characterized in that the mounting base (1) comprises two mounting surfaces with different heights, and the two pressure sensors (21) are respectively fixed on one of the mounting surfaces.

7. A pressure measuring device according to claim 6, wherein the angle between the mounting surface and the axial direction of the adapter (22) is 75 ° to 90 °.

8. Pressure measuring device according to claim 1, characterized in that two mounting holes (12) are provided on the mounting seat (1), said mounting holes (12) being used for fixing the mounting seat (1).

9. Pressure measuring device according to any of claims 1-8, characterized in that the mounting end (221) is provided with a thread, the mounting end (221) being in threaded connection with the mounting seat (1).

10. The pressure measuring device of claim 9, further comprising a sealing gasket, wherein the mounting end (221) is provided with a stop, and the sealing gasket is arranged between the stop and the mounting seat (1) and is pressed by the stop and the mounting seat (1).