Disposable pressure sensor convenient for integrated installation

Abstract

The utility model discloses a disposable pressure sensor convenient for integrated installation, the bottom of a pressure sensor body is fixedly connected with a pipeline body (1), the pressure sensor body is arranged in a shell (9), the shell (9) is arranged at the top of the pipeline body (1), the outer side wall of the pipeline body (1) is provided with a plate body (5), and the plate body (5) is fixedly connected with the shell (9) through the plate body (5). A diaphragm (3) is arranged on the inner side wall of the pipeline body (1), and filling liquid is arranged between the diaphragm and a pressure chip (61) arranged in the pressure sensor body. The pipeline body and the diaphragm are integrally formed through injection molding, so that integrated installation of the pressure sensor is facilitated, and the manufacturing cost is effectively reduced; when the pressure sensor is used, pressure in a pipeline to be measured acts on the diaphragm to deform the diaphragm so as to apply pressure to the silicone oil, and the pressure is conducted to the pressure chip through the silicone oil medium, so that the pressure value in the pipeline can be rapidly and accurately measured.

Description

Technical Field

[0001] The utility model relates to an instrument for measuring the pressure inside a pipeline, in particular to a disposable pressure sensor convenient for integrated installation, belonging to the technical field of sensors. Background Technique

[0002] Pressure sensors, especially pipeline pressure sensors, are widely used in various industrial automatic control environments, including but not limited to multiple industries such as biopharmaceuticals, oil pipelines, water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools, and hydraulic machinery. The pressure sensor can convert the sensed physical pressure parameters into standard electrical signals (such as 4-20mA), which is convenient for monitoring and management.

[0003] Generally, it is necessary to use a pressure sensor to collect the air pressure inside the pipeline in real time, so that after the product is connected to the pipeline, the pipeline pressure can be read by an electronic system connected by an external signal. However, the existing pressure sensor structure has a complex design, usually including components such as a circuit board and a pressure chip, which not only has a high cost and is not convenient for integrated installation, but also occupies a large amount of space of the pressure sensor, bringing inconvenience to the installation of the pressure sensor on various devices. Therefore, the utility model has developed a disposable pressure sensor convenient for integrated installation to solve the problems existing in the prior art and improve the installation and applicability performance of the pressure sensor. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems and provide a disposable pressure sensor convenient for integrated installation.

[0005] The technical solution of the utility model is: a disposable pressure sensor convenient for integrated installation, including a pressure sensor body, the bottom of the pressure sensor body is fixedly connected with a pipeline body, and the pressure sensor body is located inside a housing, the housing is arranged on the top of the pipeline body, and its characteristics are: a plate body is arranged on the outer side wall of the pipeline body, and the plate body is fixedly connected with the housing through the plate body, an embedding groove is arranged on the inner side of the plate body, and the pressure sensor body is fixed on the embedding groove; a diaphragm is arranged on the inner side wall of the pipeline body below the embedding groove, and the diaphragm and the pipeline body are integrally formed by injection molding; the diaphragm is connected to the pressure sensor body in communication, and a filling liquid is arranged between the diaphragm and a pressure chip arranged inside the pressure sensor body.

[0006] Further, in the above-mentioned disposable pressure sensor convenient for integrated installation, wherein: bellows joints are arranged at both ends of the pipeline body along its length direction.

[0007] Furthermore, for the above-mentioned disposable pressure sensor facilitating integrated installation, specifically: the pressure sensor body includes a pressure chip, a circuit board, a filling liquid channel and a protective shell. The pressure chip and the circuit board are both encapsulated by the protective shell, and one end of the pressure chip is connected to the circuit board through wire bonding; the other end of the pressure chip is placed inside the filling liquid channel for filling the filling liquid, and the bottom end of the filling liquid channel is communicated with the diaphragm.

[0008] Even further, for the above-mentioned disposable pressure sensor facilitating integrated installation, specifically: the pressure chip is a MEMS pressure sensor chip, and the filling liquid is silicone oil.

[0009] Even further, for the above-mentioned disposable pressure sensor facilitating integrated installation, specifically: a sealing ring is provided between the filling liquid channel and the diaphragm, and the sealing ring is tightly connected to the diaphragm through a compression ring.

[0010] Still further, for the above-mentioned disposable pressure sensor facilitating integrated installation, specifically: several equally spaced support ribs are provided between the pipe body and the housing. The top end of the support rib is fixedly connected to the bottom end of the housing, and the bottom end of the support rib is fixedly connected to the outer side wall of the pipe body.

[0011] Still further, for the above-mentioned disposable pressure sensor facilitating integrated installation, specifically: screws are provided on the housing, and threaded holes for positioning and mating with the screws are provided on the plate body.

[0012] Adopting the technical solution of the present utility model, the pipe body is connected to the pipeline to be measured for pressure. The pressure in the pipeline to be measured acts on the diaphragm, causing it to deform and then applying pressure to the silicone oil. The pressure is transmitted to the pressure chip through the silicone oil medium, so that the pressure value in the pipeline can be quickly and accurately measured. Finally, by scanning and measuring the pressure with the equipped electronic system, the pressure of the pipeline to be measured can be read.

[0013] Compared with the prior art, after adopting the technical solution of the present utility model, the pipe body and the diaphragm are integrally formed by injection molding, which is convenient for integrated installation of components and effectively reduces the manufacturing cost. When the pressure in the pipeline acts on the diaphragm and causes it to deform, the pressure generated in the pipeline compresses the silicone oil, and the pressure is transmitted to the pressure chip through the silicone oil medium, so that the pressure value in the pipeline can be quickly and accurately measured; moreover, the ends of the pipe body all adopt flare fittings suitable for quick connection of pipelines, which is also convenient for the installation of hoses. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front view of the present utility model;

[0015] Figure 2 is the top view of the present utility model;

[0016] Figure 3 is the side view of the present utility model;

[0017] Figure 4 is Figure 3 the schematic cross-sectional view taken along the line A-A of

[0018] Figure 5 is Figure 3 the partial cross-sectional view taken along the line A-A of

[0019] Figure 6 is the cross-sectional view of the pressure sensor body of the present utility model.

[0020] The meanings of the reference numerals in the figure are as follows: 1 - pipeline pipe body, 2 - bell reducer, 3 - diaphragm, 4 - groove, 5 - plate body, 6 - pressure sensor body, 61 - pressure chip, 62 - circuit board, 63 - filling liquid channel, 64 - protective shell, 7 - sealing ring, 8 - pressing ring, 9 - housing, 10 - support rib. Specific embodiments

[0021] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings to make it easier to understand and master. The components such as the sealing ring 7, the pressing ring 8, the housing 9 and the support rib 10 involved are all commonly used ones that are generally recognized by those of ordinary skill in the art, and there are no special requirements for them in this case.

[0022] As Figures 1 to 5 shown, the present utility model provides a disposable pressure sensor that is convenient for integrated installation, including a pressure sensor body 6. The bottom of the pressure sensor body 6 is fixedly connected to a pipeline pipe body 1, and the pressure sensor body 6 is located in a housing 9, and the housing 9 is arranged on the top of the pipeline pipe body 1.

[0023] According to the technical solution of the present utility model, a plate body 5 is arranged on the outer side wall of the pipeline pipe body 1, and the plate body 5 is fixedly connected to the housing 9. A groove 4 is arranged on the inner side of the plate body 5, and the pressure sensor body 6 is fixed on the groove 4; a diaphragm 3 is arranged on the inner side wall of the pipeline pipe body 1 below the groove 4, and the diaphragm 3 and the pipeline pipe body 1 are integrally formed by injection molding of PP and EPDM; the diaphragm 3 is connected to the pressure sensor body 6 in a communicating manner, and a filling liquid is arranged between the diaphragm 3 and the pressure chip arranged inside the pressure sensor body 6; the filling liquid can suppress pressure peaks, impacts and vibrations, and protect the mechanical components of the pressure gauge, thereby effectively reducing component fatigue and failures.

[0024] Specifically, the filling liquid is a silicone oil. The main function of the silicone oil is to serve as a pressure transmission medium to transmit the external pressure signal to the sensing element of the pressure sensor. When an external pressure acts on the pressure sensor, the silicone oil will deform accordingly and transmit this deformation to the sensing element. After receiving the pressure signal transmitted by the silicone oil, the sensing element will convert it into an electrical signal for output, thereby achieving the measurement of pressure.

[0025] Preferably, in the above structure: both ends of the pipe body 1 of the pipeline are provided with bevel connectors 2 along its length direction. The male bevel plug or female bevel plug of the bevel connector 2 can be selected for assembly according to the use requirements, which has higher load-bearing and relaxation capabilities and can avoid loosening and deformation.

[0026] Preferably, as Figure 6 shown, in the above structure: the pressure sensor body 6 includes a pressure chip 61, a circuit board 62, a filling liquid channel 63 and a protective shell 64. The pressure chip 61 and the circuit board 62 are both encapsulated by the protective shell 64. The pressure chip 61 is a MEMS pressure sensor chip. One end of the MEMS pressure sensor chip is connected to the circuit board 62 through wire bonding. Using a thin metal wire, through heat, pressure, and ultrasonic energy, the metal lead is tightly soldered to the substrate pad of the circuit board 62 to achieve electrical interconnection between the MEMS pressure sensor chip and the substrate and information intercommunication between the MEMS pressure sensor chips. Under ideal control conditions, electron sharing or atomic mutual diffusion will occur between the lead and the substrate, thereby achieving atomic-level bonding between the two metals, facilitating integrated installation and reducing the required occupied space volume. The other end of the MEMS pressure sensor chip is placed inside the filling liquid channel 63 for filling the filling liquid (i.e., the filling liquid is silicone oil). The bottom end of the filling liquid channel 63 is connected to the diaphragm 3. The pressure inside the pipeline acts on the diaphragm 3 to cause it to deform, compressing the silicone oil, and the silicone oil conducts the pressure to the MEMS pressure sensor chip through the filling liquid channel 63, thereby measuring the pressure value inside the pipeline.

[0027] Specifically, in the structure of the above-mentioned pressure sensor body 6, a sealing ring 7 is provided between the filling liquid channel 63 and the diaphragm 3, and the sealing ring 7 is tightly connected to the diaphragm 3 through a compression ring 8, which helps to improve the assembly sealing performance between the filling liquid channel 63 and the diaphragm 3 and avoid leakage problems.

[0028] Further, in the above structure: Several equally spaced support ribs 10 are provided between the pipe body 1 of the pipeline and the housing 9. The top end of the support rib 10 is fixedly connected to the bottom end of the housing 9, and the bottom end of the support rib 10 is fixedly connected to the outer side wall of the pipe body 1 of the pipeline. The support ribs 10 can improve the compressive, bending and torsional resistance and other properties between the pipe body 1 of the pipeline and the housing 9, and are fixedly connected by means of welding or extrusion. The shape and size of the support ribs 10 are customized according to specific requirements to meet the reinforcement and installation performance requirements of the pipe body 1 of the pipeline and the housing 9 in different application scenarios.

[0029] Further, in the above structure: Screws are provided on the housing 9, and threaded holes for positioning and cooperating with the screws are provided on the plate body 5. So as to enable detachable installation and replacement between the housing 9 and the plate body 5.

[0030] In the technical solution of the present utility model, the diaphragm 3 and the pipe body 1 are integrally injection-molded. The pressure between the diaphragm and the pressure sensor body 6 is conducted through a medium filling liquid (silicone oil) to accurately measure the pressure inside the pipeline. The combination of these two aspects is the technical key of this case. Figure 4 What is mainly shown is the related components involved in the sealed installation of the pressure sensor body 6 and the diaphragm 3. Figure 4 What is shown is the specific structure of the pressure sensor body 6. The pressure generated inside the pipeline compresses the silicone oil, and the pressure is conducted to the pressure chip 61 arranged inside the pressure sensor body 6 to measure the pressure value inside the pipeline. For components such as the sealing ring 7, the pressure ring 8, the housing 9 and the support ribs 10, those of ordinary skill in the art can make conventional settings according to the existing technology, and there are no special requirements for the model selection and combined use of them in this case.

[0031] In this way, adopting the technical solution of the present utility model, when using this disposable pressure sensor which is convenient for integrated installation in a one-time alkaline lysis system, a one-time chromatography system or a one-time ultrafiltration system, it has high precision, is easy to install and use, has a simple structure, and a low material cost; when the pipe body 1 of the pipeline is connected to the pipeline of the system to be measured for pressure, when the pressure inside the pipeline acts on the diaphragm 3 to cause it to deform, the pressure generated inside the pipeline compresses the silicone oil, and the pressure is conducted to the pressure chip 61 (i.e., the MEMS pressure sensor chip) through the silicone oil medium, so that the pressure value inside the pipeline can be quickly and accurately measured. Finally, by scanning and measuring the pressure with the equipped electronic system (the electronic system is the first-generation electronic scanning pressure measurement system, DSY-128; the second-generation electronic scanning pressure measurement system, DSY-JB), the pressure of this pipeline can be read.

[0032] As can be seen from the above description, compared with the prior art, after adopting the technical solution of the present utility model, the pipe body and the diaphragm are integrally formed by injection molding, effectively reducing the manufacturing cost. When the pressure in the pipe acts on the diaphragm to cause deformation, the pressure generated in the pipe compresses the silicone oil, and the pressure is transmitted to the pressure chip through the silicone oil medium, so that the pressure value in the pipe can be quickly and accurately measured. Moreover, the ends of the pipe body are all provided with taper connectors suitable for quick connection of the pipe, which is also convenient for the installation of the hose.

[0033] The technical solution, working process and implementation effect of the present utility model have been described in detail above. It should be noted that the described are only typical examples of the present utility model. In addition, the present utility model can also have many other specific implementation manners. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present utility model.

Claims

1. A disposable pressure sensor convenient for integrated installation, comprising a pressure sensor body (6) located inside a housing (9) and having a pressure chip (61) therein. The bottom of the pressure sensor body is fixedly connected to a pipeline body (1), and the housing (9) is arranged at the top of the pipeline body (1). It is characterized in that: A plate body (5) is provided on the outer side wall of the pipeline pipe body (1), and is fixedly connected to the housing (9) through the plate body (5). An embedding groove (4) is provided on the inner side of the plate body (5), and the pressure sensor body (6) is fixed on the embedding groove (4); a diaphragm (3) is provided on the inner side wall of the pipeline pipe body (1) below the embedding groove (4), and the diaphragm (3) and the pipeline pipe body (1) are integrally formed by injection molding; the diaphragm (3) is connected to the pressure sensor body (6) in communication, and a filling liquid is provided between the diaphragm (3) and a pressure chip (61) arranged inside the pressure sensor body (6).

2. The disposable pressure sensor facilitating integrated installation according to claim 1, wherein: Both ends of the pipeline pipe body (1) along its length direction are provided with bellows joints (2).

3. The disposable pressure sensor facilitating integrated installation according to claim 1, wherein: A plurality of support ribs (10) with equal spacing are provided between the pipeline pipe body (1) and the housing (9). The top end of the support rib (10) is fixedly connected to the bottom end of the housing (9), and the bottom end of the support rib (10) is fixedly connected to the outer side wall of the pipeline pipe body (1).

4. The disposable pressure sensor facilitating integrated installation according to claim 1, wherein: The pressure sensor body (6) includes a pressure chip (61), a circuit board (62), a filling liquid channel (63) and a protective shell (64). The pressure chip (61) and the circuit board (62) are both encapsulated through the protective shell (64). The bottom end of the filling liquid channel (63) is communicated with the diaphragm (3); one end of the pressure chip (61) is connected to the circuit board (62) through wire bonding, and the other end is placed inside the filling liquid channel (63) for filling the filling liquid.

5. The disposable pressure sensor facilitating integrated installation according to claim 4, wherein: A sealing ring (7) is provided between the filling liquid channel (63) and the diaphragm (3), and the sealing ring (7) is in close contact with the diaphragm (3) through a pressure ring (8).

6. The disposable pressure sensor facilitating integrated installation according to claim 1, wherein: The pressure chip (61) is a MEMS pressure sensor chip.

7. The disposable pressure sensor facilitating integrated installation according to claim 1, wherein: The filling liquid is silicone oil.

8. The disposable pressure sensor facilitating integrated installation according to claim 1, characterized in that: Screws are provided on the housing (9), and threaded holes for positioning and matching with the screws are provided on the plate body (5).

Images