Multi-channel pressure sensor

Abstract

The utility model belongs to the technical field of sensors, and discloses a multi-channel pressure sensor, which comprises a shell; the cover body is detachably connected with the shell, and an internal space is formed between the cover body and the shell; the cooling oil duct device comprises a first cooling joint and a second cooling joint which are arranged on the side wall of the shell, and a cooling oil duct pipeline which is arranged in the shell, clings to the shell and is communicated with the first cooling joint and the second cooling joint; and the pressure measuring channel is connected with the bottom of the shell and is arranged in the internal space between the cover body and the shell. According to the multi-channel pressure sensor, the oil channel cooling device is arranged for cooling, so that the high-temperature resistance of the multi-channel pressure sensor is improved, the pressure measuring channel can measure the pressure of a plurality of channels, and the integration degree and the reliability of a system are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors and relates to a multi-channel pressure sensor. Background Art

[0002] Multi-channel aviation airborne sensors are sensors used to measure multiple pipeline parameters simultaneously, such as fuel system pressure, lubricating oil system pressure, hydraulic system pressure, etc. With the improvement of system performance requirements, higher requirements are placed on the high temperature resistance of sensors; with the increasing degree of system integration, there is an increasing demand for using a single sensor to measure multiple pipelines simultaneously; at the same time, the system also places higher requirements on the volume and weight of sensors.

[0003] In order to achieve simultaneous measurement of three channels at high temperatures, traditional sensors can use multiple sensors for separate measurements and external cooling systems. The total volume and weight of the sensors are large, the system cross-linking interface is complex, and the disassembly and assembly workload is large. Therefore, for high-temperature resistant applications, they cannot fully meet the system's usage requirements.

[0004] Based on this, the art urgently needs a multi-channel pressure sensor to solve the above technical problems. Utility Model Content

[0005] In view of this, the utility model provides a multi-channel pressure sensor to solve the problem of high temperature resistance of the sensor.

[0006] In order to solve the above technical problems, the utility model provides a multi-channel pressure sensor, comprising:

[0007] case;

[0008] A cover body, wherein the cover body is detachably connected to the shell body, and an internal space is formed between the cover body and the shell body;

[0009] A cooling oil channel device, the cooling oil channel device comprising a first cooling joint and a second cooling joint arranged on the side wall of the shell, and a cooling oil channel pipeline arranged inside the shell and close to the shell and communicating with the first cooling joint and the second cooling joint; and

[0010] A pressure measuring channel is connected to the bottom of the shell and is arranged inside the internal space between the cover and the shell.

[0011] As a further improvement of the present utility model, the pressure measuring channel includes a first pressure measuring channel, a second pressure measuring channel and a third pressure measuring channel, the first pressure channel is connected to a first pressure joint, the second pressure measuring channel is connected to a second pressure joint, the third pressure measuring channel is connected to a third pressure joint, and the first pressure joint, the second pressure joint and the third pressure joint are all connected to the outer wall of the shell.

[0012] As a further improvement of the present invention, the first pressure measuring channel includes a first core mounting hole and a second core mounting hole, and the first core mounting hole is connected to the second core mounting hole; the second pressure measuring channel includes a third core mounting hole and a fourth core mounting hole, and the third core mounting hole is connected to the fourth core mounting hole; the third pressure measuring channel includes a fifth core mounting hole and a sixth core mounting hole, and the fifth core mounting hole is connected to the sixth core mounting hole.

[0013] As a further improvement of the present invention, the size of the first core mounting hole and the second core mounting hole is equal to the size of the third core mounting hole and the fourth core mounting hole and is larger than the size of the fifth core mounting hole and the sixth core mounting hole.

[0014] As a further improvement of the utility model, the cooling oil channel pipeline includes a bottom cooling oil channel pipeline close to the bottom of the shell and a side wall cooling oil channel pipeline close to the side wall of the shell, and the bottom cooling oil channel pipeline and the side wall cooling oil channel pipeline are connected.

[0015] As a further improvement of the utility model, the bottom cooling oil channel pipeline includes a first bottom cooling oil channel pipe, a second bottom cooling oil channel pipe, a third bottom cooling oil channel pipe and a fourth bottom cooling oil channel pipe, the first bottom cooling oil channel pipe, the second bottom cooling oil channel pipe, the third bottom cooling oil channel pipe and the fourth bottom cooling oil channel pipe are connected end to end in sequence, and the first bottom cooling oil channel pipe, the second bottom cooling oil channel pipe, the third bottom cooling oil channel pipe and the fourth bottom cooling oil channel pipe are distributed in parallel.

[0016] As a further improvement of the present invention, the cooling oil channel device also includes a cooling oil channel inlet connecting the first cooling joint and the side wall cooling oil channel pipeline and a cooling oil channel outlet connecting the second cooling joint and the side wall cooling oil channel pipeline.

[0017] As a further improvement of the present invention, the first core mounting hole, the second core mounting hole, the third core mounting hole, the fourth core mounting hole, the fifth core mounting hole and the sixth core mounting hole are all provided with threaded fasteners and core pressure plates to connect the cores.

[0018] As a further improvement of the utility model, the side wall of the core body is provided with an annular groove, and a sealing ring is arranged in the annular groove.

[0019] As a further improvement of the utility model, the cover body includes a cover plate layer, an insulating cushion layer and an insulating bottom plate layer connected in sequence, the cover plate layer and the insulating bottom plate layer are connected by a connecting piece, and a seal is provided between the cover body and the shell.

[0020] The technical effect of the present application is: compared with the prior art, the multi-channel pressure sensor provided by the utility model is cooled by setting an oil channel cooling device, so that the multi-channel pressure sensor can reduce the temperature of electronic components inside the multi-channel pressure sensor at a high temperature ambient temperature with a higher cooling efficiency, thereby improving the high temperature resistance of the multi-channel pressure sensor, and the pressure measurement channel can measure the pressure of multiple channels, thereby improving the integration and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the utility model, rather than all the embodiments. For ordinary technicians in this field, without paying creative work, other drawings obtained based on these drawings all fall within the scope of protection of this application.

[0022] Figure 1 It is a stereogram of a multi-channel pressure sensor provided by an embodiment of the utility model;

[0023] Figure 2 It is an internal stereogram of a multi-channel pressure sensor provided by an embodiment of the utility model;

[0024] Figure 3 It is a three-dimensional diagram from another angle of a multi-channel pressure sensor provided by an embodiment of the utility model;

[0025] Figure 4 It is a three-dimensional diagram of the cooling oil channel device provided by the embodiment of the utility model;

[0026] Figure 5 is a cross-sectional view of a multi-channel pressure sensor provided by an embodiment of the utility model;

[0027] Figure 6 It is a three-dimensional diagram of a cover body provided by an embodiment of the utility model.

[0028] Among them, 10 is a shell, 20 is a cover, 21 is a cover layer, 22 is an insulating pad layer, 23 is an insulating board layer, 24 is a connector, 25 is a seal, 30 is a cooling oil channel device, 31 is a first cooling joint, 32 is a second cooling joint, 33 is a cooling oil channel pipeline, 331 is a bottom cooling oil channel pipeline, 3311 is a first bottom cooling oil channel pipe, 3312 is a second bottom cooling oil channel pipe, 3313 is a third bottom cooling oil channel pipe, 3314 is a fourth bottom cooling oil channel pipe, 332 is a side wall cooling oil channel pipe, 34 is a cooling oil channel inlet, 35 is a cooling The outlet of the cooling oil channel, 40 is the pressure measuring channel, 41 is the first pressure measuring channel, 411 is the first core mounting hole, 412 is the second core mounting hole, 42 is the second pressure measuring channel, 421 is the third core mounting hole, 422 is the fourth core mounting hole, 43 is the third pressure measuring channel, 431 is the fifth core mounting hole, 432 is the sixth core mounting hole, 44 is the first pressure joint, 45 is the second pressure joint, 46 is the third pressure joint, 47 is the threaded fastener, 48 is the core pressure plate, 49 is the core, 491 is the sealing ring, and 50 is the circuit component. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] In order to make the description of the disclosed content more detailed and complete, the following is an illustrative description of the implementation method and specific examples of the utility model; however, this is not the only form of implementing or using the specific examples of the utility model. The implementation method covers the features of multiple specific examples and the method steps and their sequence for constructing and operating these specific examples. However, other specific examples can also be used to achieve the same or equal functions and step sequences. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0033] In the description of the present invention, the terms "front", "rear", "top", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0034] Please refer to Figure 1-Figure 6 The utility model provides a multi-channel pressure sensor to solve the problem of high temperature resistance of the sensor.

[0035] For details, please refer to Figure 1 A three-dimensional diagram of a multi-channel pressure sensor provided by an embodiment of the utility model, Figure 2 The utility model provides an internal stereogram of a multi-channel pressure sensor provided by an embodiment of the utility model, which includes: a housing 10, a cover 20 detachably connected to the housing 10, a cooling oil channel device 30, and a pressure measurement channel 40. The utility model improves the high temperature resistance of the multi-channel pressure sensor by providing an oil channel cooling device for cooling. The pressure measurement channel 40 can measure the pressure of multiple channels, thereby improving the integration and reliability of the system.

[0036] Specifically, an internal space is formed between the cover 20 and the shell 10; the cooling oil channel device 30 includes a first cooling joint 31 and a second cooling joint 32 arranged on the side wall of the shell 10, and a cooling oil channel pipe 33 arranged in the shell 10 and connected with the first cooling joint 31 and the second cooling joint 32 and arranged in close contact with the shell 10; the pressure measuring channel 40 is connected to the bottom of the shell 10 and arranged in the internal space between the cover 20 and the shell 10. By arranging the cooling oil channel pipe 33 arranged in the shell 10 and connected with the first cooling joint 31 and the second cooling joint 32 and arranged in close contact with the shell 10, the cooling oil flows in from the first cooling joint 31, flows through the cooling oil channel pipe 33 arranged in close contact with the shell 10, and then flows out from the second cooling joint 32. The cooling oil channel pipe 33 arranged in close contact with the shell 10 cools the inside of the shell 10, ensuring that the cooling oil flows through the entire inside of the shell 10, and the cooling effect is guaranteed to the greatest extent.

[0037] As a further improvement of the present invention, the pressure measurement channel 40 includes a first pressure measurement channel 41, a second pressure measurement channel 42 and a third pressure measurement channel 43, the first pressure channel is connected to a first pressure joint 44, the second pressure measurement channel 42 is connected to a second pressure joint 45, the third pressure measurement channel 43 is connected to a third pressure joint 46, and the first pressure joint 44, the second pressure joint 45 and the third pressure joint 46 are all connected to the outer wall of the shell 10. Preferably, the first pressure joint 44, the second pressure joint 45 and the third pressure joint 46 are connected to the outer wall of the shell 10 by laser welding, and by setting the pressure channel to include the first pressure measurement channel 41, the second pressure measurement channel 42 and the third pressure measurement channel 43, multi-channel pressure measurement of the pressure sensor is realized, a single pressure sensor can detect multi-channel pressures simultaneously, the sensor structure of multi-channel pressure measurement is simplified, the cost of multi-channel pressure measurement is reduced, the working efficiency of the multi-channel pressure sensor is improved, and the application range of the multi-channel pressure sensor is broadened.

[0038] As a further improvement of the present invention, the first pressure measurement channel 41 includes a first core mounting hole 411 and a second core mounting hole 412, and the first core mounting hole 411 and the second core mounting hole 412 are connected; the second pressure measurement channel 42 includes a third core mounting hole 421 and a fourth core mounting hole 422, and the third core mounting hole 421 and the fourth core mounting hole 422 are connected; the third pressure measurement channel 43 includes a fifth core mounting hole 431 and a sixth core mounting hole 432, and the fifth core mounting hole 431 and the sixth core mounting hole 432 are connected. By setting the first pressure measurement channel 41 to include the first core mounting hole 411 and the second core mounting hole 412, and the first core mounting hole 411 and the second core mounting hole 412 are connected; the second pressure measurement channel 42 includes the third core mounting hole 421 and the fourth core mounting hole 422, the multi-channel measurement of the pressure sensor is realized, and the dual-redundancy design of the multi-channel pressure sensor is realized, which has high reliability and high integration.

[0039] As a further improvement of the present invention, the sizes of the first core mounting hole 411 and the second core mounting hole 412 are equal to the sizes of the third core mounting hole 421 and the fourth core mounting hole 422 and are larger than the sizes of the fifth core mounting hole 431 and the sixth core mounting hole 432. The larger the test pressure, the smaller the pressure core. By setting the sizes of the fifth core mounting hole 431 and the sixth core mounting hole 432 to be smaller than the sizes of the first core mounting hole 411 and the second core mounting hole 412 and the sizes of the third core mounting hole 421 and the fourth core mounting hole 422, the third pressure measurement channel 43 can be used to install a core with a high pressure range, realize high-range pressure measurement, and further broaden the application range of the multi-channel pressure sensor.

[0040] As a further improvement of the present invention, see Figure 3-4 The cooling oil channel pipeline 33 includes a bottom cooling oil channel pipeline 331 near the bottom of the shell 10 and a side wall cooling oil channel pipeline 332 near the side wall of the shell 10, and the bottom cooling oil channel pipeline 331 is connected with the side wall cooling oil channel pipeline 332. Specifically, the bottom cooling oil channel pipeline 331 includes a first bottom cooling oil channel pipe 3311, a second bottom cooling oil channel pipe 3312, a third bottom cooling oil channel pipe 3313 and a fourth bottom cooling oil channel pipe 3314. The first bottom cooling oil channel pipe 3311, the second bottom cooling oil channel pipe 3312, the third bottom cooling oil channel pipe 3313 and the fourth bottom cooling oil channel pipe 3314 are connected end to end in sequence, and the first bottom cooling oil channel pipe 3311, the second bottom cooling oil channel pipe 3312, the third bottom cooling oil channel pipe 3313 and the fourth bottom cooling oil channel pipe 3314 are distributed in parallel. The side wall cooling oil channel pipe 332 is provided with blocking gaps at intervals. By providing the bottom cooling oil channel pipe 331 close to the bottom of the housing 10 and the side wall cooling oil channel pipe 332 close to the side wall of the housing 10, the cooling oil channel of the sensor box can basically cover the inner wall of the housing 10 of the sensor, and the side wall cooling oil channel pipe 332 is provided with blocking gaps at intervals to ensure that the cooling fuel flows evenly through the entire box body, further improving the cooling effect of the cooling oil channel on the multi-channel pressure sensor.

[0041] As a further improvement of the present invention, the cooling oil channel device 30 also includes a cooling oil channel inlet 34 connecting the first cooling joint 31 and the side wall cooling oil channel pipeline 332, and a cooling oil channel outlet 35 connecting the second cooling joint 32 and the side wall cooling oil channel pipeline 332. By setting the cooling oil channel device 30 also including the cooling oil channel inlet 34 connecting the first cooling joint 31 and the side wall cooling oil channel pipeline 332, and the cooling oil channel outlet 35 connecting the second cooling joint 32 and the side wall cooling oil channel pipeline 332, it is achieved that the cooling oil in the cooling oil channel can be easily introduced and discharged without disassembling the multi-channel pressure sensor housing 10, the convenience of adding cooling oil to the cooling oil channel is optimized, and the cooling efficiency of the multi-channel pressure sensor is improved.

[0042] As a further improvement of the present invention, see Figure 5 The first core mounting hole 411, the second core mounting hole 412, the third core mounting hole 421, the fourth core mounting hole 422, the fifth core mounting hole 431 and the sixth core mounting hole 432 are all provided with threaded fasteners 47 and core pressing plates 48 to connect the cores. The core bodies 49 in the first core body mounting hole 411, the second core body mounting hole 412, the third core body mounting hole 421, the fourth core body mounting hole 422, the fifth core body mounting hole 431 and the sixth core body mounting hole 432 are respectively electrically connected to external devices through the circuit components 50. The core bodies 49 are fixed by connecting with threaded fasteners 47 and core pressure plates 48 provided inside the first core body mounting hole 411, the second core body mounting hole 412, the third core body mounting hole 421, the fourth core body mounting hole 422, the fifth core body mounting hole 431 and the sixth core body mounting hole 432, thereby avoiding the movement of the core body 49 and improving the overall stability of the multi-channel pressure sensor and the accuracy of pressure measurement.

[0043] As a further improvement of the present invention, the core side wall is provided with an annular groove, and a sealing ring 491 is placed in the annular groove. By providing an annular groove in the core side wall and placing the sealing ring 491 in the annular groove, the sealing of the first core mounting hole 411, the second core mounting hole 412, the third core mounting hole 421, the fourth core mounting hole 422, the fifth core mounting hole 431 and the sixth core mounting hole 432 is achieved, and the overall reliability of the multi-channel pressure sensor is further improved.

[0044] As a further improvement of the present invention, see Figure 6, the cover body 20 includes a cover layer 21, an insulating cushion layer 22 and an insulating bottom layer connected in sequence, the cover layer 21 and the insulating bottom layer are connected by a connector 24, and a seal 25 is provided between the cover body 20 and the shell 10. By setting the cover body 20 to include a cover layer 21, an insulating cushion layer 22 and an insulating bottom layer connected in sequence, and connecting the cover layer 21 and the insulating bottom layer by a connector 24, the insulating cushion layer 22 is sealed into the cover, thereby improving the thermal insulation effect of the cover body 20, further ensuring that the cooling oil channel forming the internal space between the cover body 20 and the shell 10 is not easy to dissipate when the temperature is cooled, and further ensuring the temperature cooling effect of the multi-channel pressure sensor. Combined with the multi-channel pressure sensor upper cover 20, the multi-channel pressure sensor can comprehensively ensure that the temperature of the environment in which the internal components are located is below 125°C.

[0045] To verify the cooling effect, a platinum resistor was used to test the cooling effect of the sensor box. When the pressure of the cooling oil channel inlet 34 is 0.5MPa, the pressure of the cooling oil channel outlet 35 is 0MPa, the cooling fuel inlet temperature is 110℃, and the external air temperature is 215℃, the maximum internal ambient temperature of the multi-channel pressure sensor housing 10 is 121.75℃, which is lower than the maximum tolerance temperature of the components 125℃. It can be seen from the actual test results that the internal components of the multi-channel pressure sensor can work normally under this condition.

[0046] The multi-channel pressure sensor has a volume no greater than 150 mm×150 mm×50 mm and a weight no greater than 1.3 kg, making the multi-channel pressure sensor more lightweight and compact.

[0047] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A multi-channel pressure sensor, characterized in that: include: case; A cover body, wherein the cover body is detachably connected to the shell body, and an internal space is formed between the cover body and the shell body; A cooling oil channel device, the cooling oil channel device comprising a first cooling joint and a second cooling joint arranged on the side wall of the shell, and a cooling oil channel pipeline arranged inside the shell and close to the shell and communicating with the first cooling joint and the second cooling joint; and A pressure measuring channel is connected to the bottom of the shell and is arranged inside the internal space between the cover and the shell.

2. A multi-channel pressure sensor according to claim 1, characterized in that: The pressure measuring channel includes a first pressure measuring channel, a second pressure measuring channel and a third pressure measuring channel, the first pressure measuring channel is connected to a first pressure joint, the second pressure measuring channel is connected to a second pressure joint, the third pressure measuring channel is connected to a third pressure joint, and the first pressure joint, the second pressure joint and the third pressure joint are all connected to the outer wall of the shell.

3. A multi-channel pressure sensor according to claim 2, characterized in that: The first pressure measurement channel includes a first core mounting hole and a second core mounting hole, and the first core mounting hole is connected to the second core mounting hole; the second pressure measurement channel includes a third core mounting hole and a fourth core mounting hole, and the third core mounting hole is connected to the fourth core mounting hole; the third pressure measurement channel includes a fifth core mounting hole and a sixth core mounting hole, and the fifth core mounting hole is connected to the sixth core mounting hole.

4. A multi-channel pressure sensor according to claim 3, characterized in that: The sizes of the first core mounting hole and the second core mounting hole are equal to the sizes of the third core mounting hole and the fourth core mounting hole and are larger than the sizes of the fifth core mounting hole and the sixth core mounting hole.

5. The multi-channel pressure sensor according to claim 1, characterized in that: The cooling oil channel pipeline comprises a bottom cooling oil channel pipeline close to the bottom of the shell and a side wall cooling oil channel pipeline close to the side wall of the shell, and the bottom cooling oil channel pipeline is connected with the side wall cooling oil channel pipeline.

6. A multi-channel pressure sensor according to claim 5, characterized in that: The bottom cooling oil channel pipeline includes a first bottom cooling oil channel pipe, a second bottom cooling oil channel pipe, a third bottom cooling oil channel pipe and a fourth bottom cooling oil channel pipe, the first bottom cooling oil channel pipe, the second bottom cooling oil channel pipe, the third bottom cooling oil channel pipe and the fourth bottom cooling oil channel pipe are connected end to end in sequence, and the first bottom cooling oil channel pipe, the second bottom cooling oil channel pipe, the third bottom cooling oil channel pipe and the fourth bottom cooling oil channel pipe are distributed in parallel.

7. A multi-channel pressure sensor according to claim 6, characterized in that: The cooling oil channel device further includes a cooling oil channel inlet communicating with the first cooling joint and the side wall cooling oil channel pipeline, and a cooling oil channel outlet communicating with the second cooling joint and the side wall cooling oil channel pipeline.

8. The multi-channel pressure sensor according to claim 4, characterized in that: The first core mounting hole, the second core mounting hole, the third core mounting hole, the fourth core mounting hole, the fifth core mounting hole and the sixth core mounting hole are all provided with threaded fasteners and core pressing plates to connect the cores.

9. A multi-channel pressure sensor according to claim 8, characterized in that: The side wall of the core body is provided with an annular groove, and a sealing ring is arranged in the annular groove.

10. The multi-channel pressure sensor according to claim 1, characterized in that: The cover body comprises a cover plate layer, a heat insulating cushion layer and a heat insulating bottom plate layer which are connected in sequence, the cover plate layer and the heat insulating bottom plate layer are connected via a connecting piece, and a sealing piece is provided between the cover body and the shell.

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