Differential pressure sensor of equidirectional pressure interface

Abstract

The invention belongs to the technical field of aviation pressure sensor design, and discloses a differential pressure sensor with a same-direction pressure interface, which comprises a high-pressure joint, a pressure sensing core body, a connecting pipe fitting, an adapter and a low-pressure joint, and is characterized in that the pressure sensing core body is fixedly connected in the high-pressure joint, the connecting pipe fitting is fixedly connected to the high-pressure interface, and the low-pressure joint is designed into a right-angle structure; one end of the pressure sensing core body is vertically connected to the connecting pipe fitting, the other end of the pressure sensing core body is in the same direction with the high-pressure connector, and a bent gauge pressure pipe is arranged on the pressure sensing core body and communicated with the low-pressure connector through an adapter. The high-pressure interface and the low-pressure interface of the differential pressure sensor are designed to be in the same direction through structural member size design, gauge pressure pipe bending, cooperation of various welding technologies and the like, good manufacturability is achieved, the requirement for the installation environment of the differential pressure sensor is lowered, and the application range of the differential pressure sensor is widened.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation pressure sensor design, and in particular relates to a design scheme of a differential pressure sensor with a same-direction pressure interface. Background Art

[0002] The differential pressure sensor is a sensor used to measure the difference between two pressures. It is an important component of the fuel and hydraulic environmental control systems. As the environment faced by aircraft becomes more and more complex and changeable, stricter requirements are placed on the size and function of the sensor. The high-pressure interface and low-pressure interface of the traditional differential pressure sensor are on both sides of the product, which is large in size. There are many space restrictions during installation and use, and the operation is inconvenient, so it needs to be miniaturized.

[0003] The present application proposes a differential pressure sensor with a unidirectional pressure interface, in which the high-pressure interface and the low-pressure interface of the differential pressure sensor are designed to be in the same direction, and has good manufacturability. Compared with the traditional bidirectional interface, the structural size of the differential pressure sensor is reduced, the requirements for the installation environment of the differential pressure sensor are lowered, and the scope of use of the differential pressure sensor is increased. Summary of the invention

[0004] The present invention provides a differential pressure sensor with a same-direction pressure interface. The structure adopts component structural size design and multiple welding processes to achieve the same direction of the high-pressure interface and the low-pressure interface, thereby achieving the purpose of miniaturization of the differential pressure sensor.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A differential pressure sensor with a same-direction pressure interface comprises: a high-pressure joint, a pressure-sensitive core, a connecting pipe, an adapter and a low-pressure joint, wherein the pressure-sensitive core is fixedly connected in the high-pressure joint, the connecting pipe is fixedly connected to the high-pressure interface, the low-pressure joint is designed as a right-angle structure, one end of which is vertically connected to the connecting pipe, and the other end is in the same direction as the high-pressure joint, and a bent gauge pressure tube is provided on the pressure-sensitive core, and the gauge pressure tube is connected to the low-pressure joint through an adapter.

[0007] As a further technical solution of the present invention, a high-pressure channel and a low-pressure channel are respectively provided at both ends of the pressure-sensitive core, the high-pressure channel adopts a straight-line structure design, and the low-pressure channel is arranged in a gauge pressure tube, and the gauge pressure tube is a right-angle structure.

[0008] As a further technical solution of the present invention, the high-pressure joint adopts a stepped structure design, and a straight through hole is provided inside the high-pressure joint, which is connected to the high-pressure channel.

[0009] As a further technical solution of the present invention, one end of the connecting pipe is open and a cavity is provided therein, and a mounting hole is provided on the side of the connecting pipe, and the adapter is placed in the mounting hole.

[0010] As a further technical solution of the present invention, a positioning platform is provided on the inner wall of the mounting hole and cooperates with the flange of the adapter.

[0011] As a further technical solution of the present invention, the adapter includes a first mounting portion and a second mounting portion arranged on both sides of the flange, and the size of the first mounting portion is larger than that of the second mounting portion.

[0012] As a further technical solution of the present invention, the through hole inside the adapter adopts a Venturi tube structure design.

[0013] As a further technical solution of the present invention, a right-angle through hole is provided inside the low-pressure joint.

[0014] As a further technical solution of the present invention, the high-pressure interface and the pressure-sensitive core, the pressure-sensitive core and the adapter, the high-pressure interface and the connecting pipe, the connecting pipe and the adapter, and the connecting pipe and the low-pressure interface are fixedly connected in pairs by welding.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The pressure sensing core is used to measure the differential pressure signal, and the high-pressure interface and low-pressure interface of the differential pressure sensor are designed to be in the same direction through the design of structural dimensions, the bending shape of the gauge pressure tube, and the coordination of multiple welding processes. It has good manufacturability. Compared with the traditional two-way interface, it reduces the structural size of the differential pressure sensor, reduces the requirements for the installation environment of the differential pressure sensor, and increases the scope of use of the differential pressure sensor.

[0017] 2. It can realize the miniaturization and lightweight of the differential pressure sensor and improve the operability of the differential pressure sensor installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a differential pressure sensor with a same-direction pressure interface according to the present invention;

[0019] Figure 2 The figure is a schematic diagram of the assembly of a differential pressure sensor with a same-direction pressure interface according to the present invention.

[0020] In the figure: high-pressure joint 1, pressure-sensitive core 2, connecting pipe 3, adapter 4, low-pressure joint 5, gauge pressure tube 6, high-pressure channel 7, low-pressure channel 8, cavity 9, mounting hole 10, positioning platform 11, flange 12, first mounting part 13, second mounting part 14. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-2 The present invention provides a differential pressure sensor with a same-direction pressure interface, which includes: a high-pressure joint 1, a pressure-sensitive core 2, a connecting pipe 3, an adapter 4 and a low-pressure joint 5. The pressure-sensitive core 2 is fixedly connected in the high-pressure joint 1, the connecting pipe 3 is fixedly connected to the high-pressure interface, and the low-pressure joint 5 is designed as a right-angle structure. A right-angle through hole is provided inside the low-pressure joint 5, one end of which is vertically connected to the connecting pipe 3, and the other end is in the same direction as the high-pressure joint 1. A curved gauge pressure tube 6 is provided on the pressure-sensitive core 2, and the gauge pressure tube 6 is connected to the low-pressure joint 5 through an adapter 4. The high-pressure joint 1 and the low-pressure joint 5 of the sensor are in the same direction, and the pressure-sensitive core 2 is used to realize the measurement of differential pressure, and the gauge pressure tube 6 is used to meet the pressure sensing of the low-pressure end, and the pressure difference signal between the high-pressure interface head and the low-pressure joint 5 is converted into an electrical signal output.

[0023] A high-pressure channel 7 and a low-pressure channel 8 are respectively provided at both ends of the pressure-sensing core 2. The high-pressure channel 7 adopts a straight-line structure design, and the low-pressure channel 8 is arranged in a gauge pressure tube 6. The gauge pressure tube 6 is a right-angle structure.

[0024] The high-pressure connector 1 adopts a stepped structure design, and a straight through hole is provided inside the connector, which is connected to the high-pressure channel 7 .

[0025] One end of the connecting pipe 3 is open, and a cavity 9 is provided therein. A mounting hole 10 is provided on the side of the connecting pipe 3, and the adapter 4 is placed in the mounting hole 10. A positioning platform 11 is provided on the inner wall of the mounting hole 10, which cooperates with the flange 12 of the adapter 4.

[0026] The adapter 4 includes a first mounting portion 13 and a second mounting portion 14 disposed on both sides of the flange 12, and the first mounting portion 13 is larger than the second mounting portion 14. The through hole inside the adapter 4 adopts a venturi tube structure design to facilitate changing the flow of the medium.

[0027] The high-pressure interface and the pressure-sensing core 2, the pressure-sensing core 2 and the adapter 4, the high-pressure interface and the connecting pipe 3, the connecting pipe 3 and the adapter 4, and the connecting pipe 3 and the low-pressure interface are fixedly connected in pairs by welding. The airtightness of the differential pressure sensor is ensured by the coordinated use of multiple welding processes.

[0028] The assembly process and sequence are:

[0029] 1. The high-voltage connector 1 and the pressure-sensitive core 2 are fixed by laser welding to ensure air tightness;

[0030] 2. The pressure-sensing core 2 and the adapter 4 are fixed by resistance brazing to ensure air tightness, and a customized tooling is used to limit the distance between the two parts;

[0031] 3. Use customized tooling to bend the gauge pressure tube 6 of the pressure sensing core 2 to meet assembly requirements;

[0032] 4. Assemble the high-voltage connector 1, the pressure-sensitive core 2, the connecting pipe 3, and the adapter 4 according to the positions shown in the figure. The high-voltage connector 1 and the connecting pipe 3 are fixed by laser welding;

[0033] 5. The connecting pipe 3 and the adapter 4 are laser welded and air tightness is ensured;

[0034] 6. Manual argon arc welding is used to connect the pipe fitting 3 and the low-pressure interface, and airtightness is ensured.

[0035] Customized tooling is used to define the distance between the pressure-sensitive core 2 and the adapter 4 to meet assembly requirements.

[0036] The manufacturability of the differential pressure sensor is ensured by designing the structural dimensions of each component.

[0037] So far, the purpose of the present invention has been achieved.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A differential pressure sensor with a same-direction pressure interface, characterized in that , including a high-pressure joint, a pressure-sensitive core, a connecting pipe, an adapter and a low-pressure joint. The pressure-sensitive core is fixedly connected to the high-pressure joint, the connecting pipe is fixedly connected to the high-pressure interface, and the low-pressure joint is designed as a right-angle structure, one end of which is vertically connected to the connecting pipe, and the other end is in the same direction as the high-pressure joint. A curved gauge pressure tube is provided on the pressure-sensitive core, and the gauge pressure tube is connected to the low-pressure joint through an adapter.

2. A differential pressure sensor with a same-direction pressure interface according to claim 1, characterized in that: A high-pressure channel and a low-pressure channel are respectively provided at both ends of the pressure-sensitive core. The high-pressure channel adopts a straight-line structure design, and the low-pressure channel is arranged in a gauge pressure tube. The gauge pressure tube is a right-angle structure.

3. A differential pressure sensor with a same-direction pressure interface according to claim 2, characterized in that: The high-pressure joint adopts a stepped structure design, and a straight through hole is provided inside the high-pressure joint, which is connected with the high-pressure channel.

4. A differential pressure sensor with a same-direction pressure interface according to claim 3, characterized in that: One end of the connecting pipe is open and a cavity is arranged therein. A mounting hole is arranged on the side of the connecting pipe, and the adapter is placed in the mounting hole.

5. A differential pressure sensor with a same-direction pressure interface according to claim 4, characterized in that: A positioning platform is provided on the inner wall of the mounting hole and matches with the flange of the adapter.

6. A differential pressure sensor with a same-direction pressure interface according to claim 5, characterized in that: The adapter comprises a first mounting portion and a second mounting portion arranged on both sides of the flange, and the size of the first mounting portion is larger than that of the second mounting portion.

7. A differential pressure sensor with a same-direction pressure interface according to claim 6, characterized in that: The through hole inside the adapter adopts a Venturi tube structure design.

8. A differential pressure sensor with a same-direction pressure interface according to claim 7, characterized in that: A right-angle through hole is arranged inside the low-pressure joint.

9. A differential pressure sensor with a same-direction pressure interface according to claim 8, characterized in that: The high-pressure interface and the pressure-sensitive core, the pressure-sensitive core and the adapter, the high-pressure interface and the connecting pipe, the connecting pipe and the adapter, and the connecting pipe and the low-pressure interface are fixedly connected in pairs by welding.

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