Contact type simple differential pressure sensing device

Abstract

The utility model relates to a kind of contact type simple differential pressure sensing device, including installation base, installation base includes bearing plate, and the inner end surface of bearing plate extends and has deformation contact plate;Deformation contact plate and bearing plate between distribution have main deformation release groove;The outer end surface of bearing plate extends and has installation contact ring;Installation contact ring and deformation contact plate between distribution have secondary deformation release groove;The upper of bearing plate is equipped with pressure sensing component;Deformation contact plate is connected with pressure sensing plate by link component, and the lower surface of pressure sensing plate and the upper surface between pressure sensing component distribution have reserved gap;Adjustable contact terminal is installed on deformation contact plate, and the upper surface of pressure sensing component is corresponded below adjustable contact terminal. Thus, by the arc structure design of C-shaped deformation contact plate, cooperate the gap optimization of main and secondary deformation release groove, make stress deformation along arc even distribution, avoid local stress concentration.

Description

Technical Field

[0001] This utility model relates to a sensing device that can release excess stress, and more particularly to a simple contact-type differential pressure sensing device. Background Technology

[0002] Differential pressure sensors, used to detect the difference between two pressures, are widely used in HVAC systems, hydraulic circuits, pneumatic equipment, and environmental monitoring. Currently, commonly used differential pressure sensors utilize a separator that drives PCB board deformation under differential pressure, with a piezoelectric sensor sensing the deformation for detection. However, these sensors rely on the PCB directly bearing the force of the separator, lacking dedicated deformation release and stress dispersion structures. Long-term use can easily lead to structural fatigue damage due to stress concentration. Furthermore, existing pressure sensor mounting structures, while improving assembly accuracy through threaded and welded connections, lack stress isolation structures designed for differential pressure sensing requirements. Their simplistic assembly methods also fail to meet the demands of flat surface bonding, rapid disassembly and assembly, and robust fastening under harsh conditions. Moreover, commonly used differential pressure sensors often lack integrated sensitivity adjustment functions or require complex mechanical structures, resulting in low calibration efficiency and susceptibility to errors.

[0003] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a simple contact-type differential pressure sensing device, which would have greater industrial application value. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a simple contact-type differential pressure sensing device.

[0005] This utility model discloses a simple contact-type differential pressure sensing device, comprising a mounting base, wherein: the mounting base includes a support plate, and a deformation contact plate extends from the inner end face of the support plate; a main deformation release groove is distributed between the deformation contact plate and the support plate; a mounting contact ring extends from the outer end face of the support plate; a secondary deformation release groove is distributed between the mounting contact ring and the deformation contact plate; a pressure sensing component is mounted above the support plate; the deformation contact plate is connected to the pressure sensing plate via a connecting component, and a reserved gap is distributed between the lower surface of the pressure sensing plate and the upper surface of the pressure sensing component; an adjustable contact terminal is mounted on the deformation contact plate, and the lower part of the adjustable contact terminal corresponds to the upper surface of the pressure sensing component.

[0006] Furthermore, in the aforementioned simple contact-type differential pressure sensing device, the deformation contact plate is distributed in a C-shape, and the inner bend of the C-shape is connected to the inner end face of the bearing plate.

[0007] Furthermore, in the aforementioned simple contact-type differential pressure sensing device, the outer edge of the deformation contact plate is provided with rounded chamfers.

[0008] Furthermore, in the aforementioned simple contact-type differential pressure sensing device, the width gap of the main deformation release groove is 1 to 4 mm; and the width gap of the secondary deformation release groove is 2 to 5 mm.

[0009] Furthermore, in the aforementioned simple contact-type differential pressure sensing device, the width gap of the main deformation release groove is 1.5 mm; and the width gap of the secondary deformation release groove is 2.5 mm.

[0010] Furthermore, in the aforementioned simple contact-type differential pressure sensing device, the pressure sensing component is arched, and both ends of the pressure sensing component form contact fins. A main connection hole is provided on the contact fins. A secondary connection hole is provided at the corresponding position of the deformable contact plate. The connecting component passes through the main connection hole and the secondary connection hole. The main connection hole and the secondary connection hole are threaded holes. The connecting component is a bolt, and a nut is connected to the bottom of the bolt.

[0011] Furthermore, in the aforementioned simple contact-type differential pressure sensing device, the adjustable contact terminal includes a flat-headed adjusting screw threaded into the deformable contact plate, and the flat-headed adjusting screw is located above the pressure sensing component and has a planar structure.

[0012] Furthermore, in the aforementioned simple contact differential pressure sensing device, a rubber contact pad is fitted onto the planar structure.

[0013] Furthermore, in the aforementioned simple contact-type differential pressure sensing device, the pressure sensing component is a pressure sensing chip or a hydraulic sensing chip, the sensing wire of the pressure sensing component extends out of the carrier plate, and the sensing wire is covered with a tensile protective sleeve.

[0014] Furthermore, in the aforementioned simple contact-type differential pressure sensing device, the back of the mounting contact ring is provided with several anti-slip adhesive grooves; or, the back of the mounting contact ring is attached with self-adhesive strips; or, the back of the mounting contact ring is distributed with several plug-in posts; or, the mounting contact ring is distributed with several limiting holes.

[0015] By means of the above solution, this utility model has at least the following advantages: 1. The arc-shaped structure design of the C-shaped deformation contact plate, combined with the optimized gap between the main and auxiliary deformation release grooves, ensures that the stress deformation is evenly distributed along the arc, avoiding local stress concentration. Simultaneously, the rounded chamfer on the outer edge of the deformation contact plate further reduces stress points, significantly improving the structural fatigue life and ensuring the stability of long-term differential pressure monitoring.

[0016] 2. It integrates four installation solutions: anti-slip adhesive, self-adhesive strips, connectors, and mechanical fastening. It can be flexibly selected according to the characteristics of the installation surface and disassembly and assembly requirements, covering installation needs in multiple scenarios from precision equipment to harsh working conditions.

[0017] 3. Equipped with independent adjustable contact terminals, the differential pressure sensing sensitivity can be precisely adjusted. The pressure sensing component can flexibly select either a pressure sensing chip or a hydraulic sensing chip depending on the measured medium (gas or liquid), offering high adaptability.

[0018] 4. The overall structure is simple, easy to manufacture and use, and has low maintenance costs.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a simple contact-type differential pressure sensing device.

[0021] Figure 2 This is a schematic diagram of the back structure of a simple contact-type differential pressure sensor.

[0022] Figure 3 This is a schematic diagram of the forward structure of a simple contact-type differential pressure sensing device.

[0023] The meanings of the labels in the figures are as follows.

[0024] Detailed Implementation The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0025] like Figures 1 to 3This simple contact-type differential pressure sensing device includes a mounting base, which is unique in that the mounting base serves as the support and deformation foundation of the device. It is composed of a support plate 1, a deformation contact plate 2, and a mounting contact ring 4. The support plate 1 can be made of 6061 aluminum alloy sheet with a thickness of 2 to 5 mm, combining lightweight and structural strength. Meanwhile, the deformation contact plate 2 is C-shaped, with the inner curve of the C-shape integrally formed with the inner end face of the support plate 1. During processing, CNC milling can be used to ensure the symmetry and dimensional accuracy of the C-shape. Thus, the C-shaped structure design allows the deformation contact plate 2 to deform uniformly along the arc direction under stress, avoiding localized stress concentration. Furthermore, the outer edge of the deformation contact plate 2 has rounded chamfers with a radius of 0.5 to 1.5 mm. This prevents scratches to operators during installation and use, and further reduces stress concentration points during deformation, improving the structural fatigue life.

[0026] Meanwhile, this utility model also includes a main deformation release groove 3, located between the deformation contact plate 2 and the support plate 1, with a width gap of 1 to 4 mm, preferably 1.5 mm. This ensures that the deformation contact plate 2 has sufficient deformation space while preventing the support plate 1 from losing its supporting rigidity due to excessive groove width. Furthermore, this utility model also includes a mounting contact ring 4, integrally formed from the outer end face of the support plate 1, with a secondary deformation release groove 5 distributed between it and the deformation contact plate 2. The width gap of the secondary deformation release groove 5 is 2 to 5 mm, preferably 2.5 mm. The function of the secondary deformation release groove 5 is to isolate the installation stress of the mounting contact ring 4 from the sensing deformation of the deformation contact plate 2, preventing the preload during installation from interfering with the pressure differential sensing accuracy. Simultaneously, during periods of increased pressure differential fluctuation, it can appropriately release the pressure deformation, preventing abnormal stress points from causing breakage.

[0027] Furthermore, considering that as a weighing or pressure sensing component, it needs to be installed in different ways depending on the actual measuring equipment, this utility model is compatible with the following installation methods: Option 1 features several anti-slip adhesive grooves on the back, each 0.8-1.2 mm deep and 2-3 mm wide, arranged in a ring of 3-5 grooves. This allows for reliable adhesion between the device and the mounting surface of the equipment by applying epoxy resin or other adhesives, making it suitable for smooth, flat installation environments.

[0028] Option 2 features a self-adhesive strip 14 on the back, 0.3-0.6 mm thick. An acrylic pressure-sensitive adhesive layer can be used, offering long-lasting adhesion and temperature resistance from -20℃ to 80℃. During use, the release paper can be directly removed for secure adhesion, suitable for the rapid layout of pressure-sensitive contacts in multi-contact measuring equipment.

[0029] Option 3 features several connector pins on the back, 1-2 mm in diameter and 2-4 mm in length. These pins can be interference-fitted with the mounting holes. This physical connection enables positioning and fixation, suitable for scenarios requiring rapid assembly and disassembly. It is primarily used for rapid deployment of sensors within commonly used pressure-bearing boxes.

[0030] Option 4 features several limiting holes, 3-4 mm in diameter, which engage with external fasteners such as screws and pins. This allows for mechanical fastening and is suitable for harsh conditions such as vibration and impact. It is primarily applicable to the pressure testing requirements of certain mobile devices.

[0031] In a preferred embodiment of this invention, a pressure sensing component 6, shaped like an arch, is mounted above the support plate 1. The arch is typically 2 to 4 millimeters high, with both ends extending to form contact fins 9. A main connecting hole is provided on the contact fins 9, with a diameter adapted to the connecting component, such as an M3 threaded hole. Simultaneously, the arch-shaped structure can produce uniform bending deformation under pressure, resulting in more uniform force distribution on the sensing chip and improved detection linearity. During implementation, depending on different measurement requirements, the pressure sensing component 6 can be equipped with a pressure sensing chip. For example, a piezoresistive pressure chip is suitable for gas differential pressure detection. Alternatively, a hydraulic sensing chip, such as a capacitive hydraulic chip, can be used, suitable for liquid differential pressure detection. This allows for flexible selection based on the type of medium being measured.

[0032] In practical implementation, the sensor wire 13 can be a shielded wire, which has strong anti-interference capabilities. After installation, it is led out of the carrier plate 1 for easy connection with the corresponding equipment. The lead-out position can be a wire opening on the side of the carrier plate 1 or a direct extension. At the same time, a nylon tensile protective sleeve with a wall thickness of 0.5-1 mm is provided on the sensor wire 13, which has excellent wear resistance and tensile strength. This effectively prevents the wire from being damaged by pulling and friction.

[0033] Furthermore, this invention utilizes a deformation contact plate 2 connected to a pressure sensing plate 7 via a connecting assembly to transmit differential pressure. The pressure sensing plate 7 can be constructed from a 7075 aluminum alloy plate, with a pre-reserved gap of 0.5-1.5 mm between its lower surface and the upper surface of the pressure sensing assembly 6. This gap provides space for the deformation of the pressure sensing assembly 6 or the displacement of the pressure sensing plate 7, preventing direct rigid contact that could lead to sensing failure. The connecting assembly consists of bolts 10 and nuts 11. During assembly, M3 stainless steel bolts 10 and matching M3 stainless steel nuts 11 can be used. The selected main and secondary connecting holes are threaded holes (matching the threads of bolts 10). During installation, bolts 10 are passed through the main and secondary connecting holes sequentially, and then nuts 11 are tightened. The relative position of the pressure sensing assembly 6 and the deformation contact plate 2 can be finely adjusted by adjusting the tightening torque of the bolts 10, thereby calibrating the sensing zero point.

[0034] This invention features an adjustable contact terminal 8 mounted on a deformation contact plate 2 for adjusting the sensing sensitivity. Specifically, the adjustable contact terminal 8 includes a flat-headed adjusting screw threaded into a threaded hole in the deformation contact plate 2. The end face of the flat-headed adjusting screw above the pressure-sensitive component 6 is planar, ensuring uniform contact with the component. A nitrile rubber contact pad 12, 1 to 2 millimeters thick, is fitted onto this planar structure. To prevent accidental detachment, it can be independently bonded using epoxy structural adhesive. During commissioning, the contact pressure between the flat-headed adjusting screw and the pressure-sensitive component 6 can be changed by screwing it in or out, thereby adjusting the differential pressure sensing sensitivity of the device.

[0035] The working principle of this utility model is as follows: When a perceptible pressure difference exists above the device, the pressure difference force pushes the pressure-sensing plate 7 to displace. This displacement then causes the deformation contact plate 2 to elastically deform along its C-shaped structure. The main deformation release groove 3 and the secondary deformation release groove 5 provide sufficient space for the inner and outer deformations of the deformation contact plate 2, respectively, avoiding any restriction on deformation by the support plate 1 or the mounting contact ring 4. Furthermore, the deformation of the deformation contact plate 2 is transmitted to the pressure-sensing component 6 via the adjustable contact terminal 8, causing the pressure-sensing component 6 to deform accordingly. Simultaneously, the pressure-sensing component 6 can also directly sense the pressure difference force. Finally, the force is transmitted to an external detection device via the sensing wire 13, ultimately achieving quantitative detection of the pressure difference.

[0036] Furthermore, the directions or positional relationships described in this utility model are based on the directions or positional relationships shown in the accompanying drawings. They are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or structure referred to must have a specific orientation, or to operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A simple contact-type differential pressure sensing device, comprising a mounting base, characterized in that: The mounting base includes a support plate, with a deformation contact plate extending from the inner end face of the support plate; a main deformation release groove is distributed between the deformation contact plate and the support plate; a mounting contact ring extends from the outer end face of the support plate; a secondary deformation release groove is distributed between the mounting contact ring and the deformation contact plate; a pressure sensing component is mounted above the support plate; the deformation contact plate is connected to the pressure sensing plate via a connecting component, and a reserved gap is distributed between the lower surface of the pressure sensing plate and the upper surface of the pressure sensing component; an adjustable contact terminal is mounted on the deformation contact plate, with the lower part of the adjustable contact terminal corresponding to the upper surface of the pressure sensing component.

2. The contact-type simple differential pressure sensing device according to claim 1, characterized in that: The deformable contact plates are distributed in a C-shape, and the inner bend of the C-shape is connected to the inner end face of the bearing plate.

3. The contact-type simple differential pressure sensing device according to claim 1, characterized in that: The outer edge of the deformable contact plate has rounded chamfers.

4. The simple contact-type differential pressure sensing device according to claim 1, characterized in that: The width gap of the main deformation release groove is 1 to 4 mm; the width gap of the secondary deformation release groove is 2 to 5 mm.

5. The simple contact-type differential pressure sensing device according to claim 4, characterized in that: The width gap of the main deformation release groove is 1.5 mm; The width gap of the secondary deformation release groove is 2.5 mm.

6. The contact-type simple differential pressure sensing device according to claim 1, characterized in that: The pressure sensing component is arched, with its two ends forming contact fins. The contact fins have main connecting holes. The deformation contact plate has secondary connecting holes at corresponding positions. The connecting component passes through the main connecting holes and secondary connecting holes. The main connecting holes and secondary connecting holes are threaded holes. The connecting component is a bolt, and a nut is connected to the bottom of the bolt.

7. The contact-type simple differential pressure sensing device according to claim 1, characterized in that: The adjustable contact terminal includes a flat-headed adjusting screw threaded into the deformable contact plate, and the flat-headed adjusting screw is located above the pressure sensing component and has a planar structure.

8. The simple contact-type differential pressure sensing device according to claim 7, characterized in that: A rubber contact pad is fitted onto the planar structure.

9. The simple contact-type differential pressure sensing device according to claim 1, characterized in that: The pressure sensing component is a pressure sensing chip or a hydraulic sensing chip. The sensing wire of the pressure sensing component extends out of the carrier plate, and the sensing wire is covered with a tensile protective sleeve.

10. The simple contact-type differential pressure sensing device according to claim 1, characterized in that: The mounting contact ring has several anti-slip adhesive grooves on its back; or, the mounting contact ring has self-adhesive strips attached to its back; or, the mounting contact ring has several plug-in posts distributed on its back; or, the mounting contact ring has several limiting holes distributed on its back.

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