Microwave switch

Abstract

The utility model discloses a microwave switch, which comprises a shell, a probe, a mounting piece, an antenna and a circuit board, the probe is hermetically mounted at one end of the shell through the mounting piece, the circuit board is arranged in the shell, and the antenna is arranged in the probe and connected with the circuit board. Compared with the prior art, the microwave switch provided by the utility model has the advantages that the probe is hermetically mounted on the shell through the mounting piece so as to ensure the sealing performance. The shell and the mounting piece which are made of metal nickel and the probe made of a PFA material are adopted, and the two materials both have good strong alkali resistance, so that the use requirement in a strong alkali environment can be met. And meanwhile, by utilizing the shrinkage characteristic of the PFA material, the probe is fixed on the shell through the mounting piece, so that the sealing between the probe and the shell is ensured, and external high-pressure liquid is prevented from entering the microwave switch cavity to corrode the circuit board.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, in particular to a microwave switch. Background Art

[0002] Microwave switches, part of the instrumentation and sensor industry, play a crucial role in industrial process monitoring. The operating principle of a microwave switch is that a microwave signal is transmitted through a microwave antenna. Refraction and reflection occur as the signal passes through a medium, and the reflected signal is ultimately attenuated. The degree of microwave attenuation is related to the depth of the material, independent of the color, density, or viscosity of the medium. The depth of the material can be determined by measuring the reflected microwave signal.

[0003] Existing microwave switch casings are typically constructed from multiple interconnected sections, threaded or welded together. This results in poor sealing and inconvenient subsequent assembly and disassembly. Microwave switch casings are typically made of PEEK (polyetheretherketone) and carbon steel, which cannot function properly in strong acidic and alkaline environments, such as 70% sodium hydroxide, and exhibit poor corrosion resistance.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a microwave switch with good corrosion resistance.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by a specific embodiment of the present invention is as follows:

[0007] A microwave switch comprises a housing, a probe, a mounting piece, an antenna and a circuit board. The probe is sealed and mounted on one end of the housing via the mounting piece. The circuit board is arranged inside the housing. The antenna is arranged inside the probe and connected to the circuit board.

[0008] In one or more embodiments of the present invention, one end of the probe extends radially to form an abutting portion, and the abutting portion is fixed between the housing and the mounting member.

[0009] In one or more embodiments of the present invention, the mounting member includes a mounting portion and a fixing portion connected to each other, the abutting portion is fixed between the housing and the fixing portion, and the mounting portion is fixedly mounted to the housing.

[0010] In one or more embodiments of the present invention, an inner wall of the mounting portion is provided with an internal thread, an outer side of the shell is correspondingly provided with an external thread, and the mounting portion is threadedly connected to the shell.

[0011] In one or more embodiments of the present invention, the material of the housing is nickel; and / or the material of the probe is PFA; and / or the material of the mounting piece is nickel.

[0012] In one or more embodiments of the present invention, the housing includes a first shell and a second shell, the first shell is fixedly mounted to one end of the second shell, and the probe is mounted on the other end of the second shell.

[0013] In one or more embodiments of the present invention, the first shell is threadedly connected to one end of the second shell.

[0014] In one or more embodiments of the present invention, a heat dissipation structure is provided on the housing.

[0015] In one or more embodiments of the present invention, the microwave switch further includes a grounding connector, which is disposed inside the housing and connected to the circuit board and the housing.

[0016] In one or more embodiments of the present invention, the microwave switch further includes a copper rod, which is disposed inside the housing, and the antenna is connected to the circuit board via the copper rod.

[0017] Compared to existing technologies, the microwave switch of this invention utilizes mounting hardware to seal the probe against the housing, ensuring a tight seal. The housing is made of nickel and the probe is made of PFA, both materials with excellent alkaline resistance, meeting the requirements of use in highly alkaline environments. Furthermore, the shrinkage properties of PFA are utilized, and the mounting hardware secures the probe to the housing, ensuring a tight seal between the two. This prevents external high-pressure liquids from entering the microwave switch cavity and corroding the circuit boards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a cross-sectional view of a microwave switch in one embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0021] The terms "coupled," "connected," or "connected" in this specification encompass both direct and indirect connections. An indirect connection is a connection made through an intermediate medium, such as an electrically conductive medium, which may have parasitic inductance or capacitance. An indirect connection may also include a connection through other active or passive devices, such as switches, follower circuits, or other circuits or components, to achieve the same or similar functional objectives. Furthermore, in this specification, terms such as "first" and "second" are primarily used to distinguish one technical feature from another and do not necessarily require or imply a specific relationship, quantity, or order between these technical features.

[0022] In the detailed description of the specification, reference is made to the accompanying drawings forming a part thereof, wherein like reference numerals designate like parts throughout, and wherein exemplary embodiments that may be implemented are shown by way of example. It should be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present disclosure. Therefore, the following detailed description should not be construed in a limiting sense.

[0023] The various operations in the specification may be described as multiple discrete actions or operations in a manner that is most helpful in understanding the claimed subject matter. However, the order of description should not be interpreted as implying that these operations must be sequentially related. Specifically, these operations may not be performed in the order presented. The described operations may be performed in an order different from the described embodiments. Various additional operations may be performed and / or the described operations may be omitted in additional embodiments.

[0024] For the purposes of this disclosure, the phrase "A and / or B" means (A), (B), or (A and B). For the purposes of this disclosure, the phrase "A, B and / or C" means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B and C).

[0025] Various components and devices may be referred to or shown in the singular form in this document (for example, "MOS tube", "transistor", "switch", etc.), but this is only for convenience of discussion, and any element referred to in the singular form may include multiple such elements according to the teachings of this document.

[0026] The specification uses the phrases "in one embodiment," "in other embodiments," or "in some embodiments," which can each refer to one or more of the same or different embodiments. In addition, the terms "including," "comprising," "having," etc. used with respect to the embodiments of the present disclosure are synonymous.

[0027] like Figure 1 As shown, a microwave switch in an embodiment of the present invention includes a housing 10 , a mounting member 20 , a probe 30 , an antenna 40 , a circuit board 50 , a grounding connector 60 and a copper rod 70 .

[0028] Among them, the probe 30 is sealed and installed at one end of the shell 10 through the mounting part 20, the circuit board 50 is arranged inside the shell 10, the copper rod 70 is arranged inside the shell 10, and the antenna 40 is arranged inside the probe 30, and the antenna 40 is connected to the circuit board 50 through the copper rod 70.

[0029] The antenna 40 is used to receive and transmit microwave signals, the copper rod 70 is used to extend the antenna 40, and the circuit board 50 is used to perform data processing.

[0030] The grounding connector 60 is disposed inside the housing 10 and is connected to the circuit board 50 and the housing 10. The grounding connector 60 is used to connect the circuit board 50 and the housing 10 so that the circuit is effectively grounded. The material of the grounding connector 60 is preferably brass.

[0031] Preferably, the material of the shell 10 is nickel, specifically nickel 200. Nickel 200 has strong alkali resistance and meets the requirements of the use environment of strong alkali (such as 70% concentration of sodium hydroxide).

[0032] Preferably, the probe material is PFA, which has good resistance to strong alkali and does not affect the propagation of microwave signals.

[0033] like Figure 1 As shown, the housing 10 includes a first shell 11 and a second shell 12. The first shell 11 is fixedly mounted to one end of the second shell 12, and the probe 30 is mounted on the other end of the second shell 12.

[0034] Specifically, the circuit board 50 and the ground connector 60 are both disposed within the first housing 11, and the copper rod 70 is disposed within the second housing 12. The arrangement of the first housing 11 and the second housing 12 facilitates the installation of the circuit board 50 and the copper rod 70. Furthermore, the second housing 12 can be replaced with different lengths of the copper rod 70, facilitating product design and selection of microwave switches.

[0035] In one embodiment, the first shell 1 is threadedly connected to one end of the second shell 12. In other embodiments, the first shell 11 and one end of the second shell 12 can also be installed by snap-fit ​​connection, sealing adhesive bonding, welding, etc., and the housing 10 can also adopt an integrated structure.

[0036] like Figure 1 As shown, a heat dissipation structure 13 is provided on the first housing 11. Since the circuit board 50 will generate high temperature during operation, the heat dissipation structure 13 can cool the circuit board 50 to ensure circuit safety and normal operation.

[0037] Specifically, the heat dissipation structure 13 includes a plurality of heat dissipation fins arranged on the outer surface of the first shell 11 . The heat dissipation fins and the first shell 11 are integrally formed to reduce unnecessary welding and thread sealing, thereby avoiding affecting the sealing and pressure resistance of the microwave switch.

[0038] like Figure 1 As shown, one end of the probe 30 extends radially to form an abutting portion 31 , and the abutting portion 31 is fixed between the second housing 12 and the mounting member 20 .

[0039] Specifically, the mounting member 20 includes a mounting portion 21 and a fixing portion 22 connected to each other. The abutting portion 31 is fixed between the second housing 12 and the fixing portion 22, and the mounting portion 21 is fixedly mounted to the second housing 12.

[0040] The abutting portion 31 is fixed by the second housing 12 and the fixing portion 22 , and the abutting portion 31 can function as a sealing ring to prevent external liquid from penetrating into the interior of the microwave switch.

[0041] In one embodiment, the inner wall of the mounting portion 21 is provided with an internal thread, and the outer side of the second housing 12 is correspondingly provided with an external thread, so that the mounting portion 21 is threadedly connected to the second housing 12. In other embodiments, the mounting portion 21 and the second housing 12 may be connected by other mounting methods such as snap-fit ​​connection, sealing adhesive bonding, welding, etc.

[0042] In one embodiment, the fixing portion 22 is annular, and the mounting portion 21 is connected to the outer periphery of the fixing portion 22. The mounting portion 21 and the fixing portion 22 are integrally formed, and the fixing portion 22 has a central through-hole. This allows the mounting member 20 to be first placed on the probe 30 and then fixed to the second housing 12. In other embodiments, the mounting portion 21 and the fixing portion 22 may also have other shapes.

[0043] Preferably, the material of the mounting member 20 is nickel, specifically nickel 200, which has strong alkali resistance and meets the requirements of strong alkaline use environment.

[0044] In actual use, the split design of the first and second housings 11, 12 facilitates the installation of the circuit board 50 and copper rod 70. When installing the probe 30 and the second housing 12, the mounting member 20 can be placed onto the probe 30 through the central through-hole of the fixing portion 22. The mounting portion 21 can then be tightened, allowing the fixing portion 22 to press the abutment portion 31 of the probe 30 against the end of the second housing 12. Furthermore, due to the material characteristics of the probe 30, it has a certain degree of elasticity. When the abutment portion 31 is fixed to the second housing 12, it can act as a sealing ring to prevent external liquid from seeping in.

[0045] Since the mounting portion 21 and the second shell 12 are installed by threaded installation, it is relatively easy to control the tightening degree of the mounting member 20, thereby ensuring that the fixing portion 22 and the second shell 12 fully squeeze the abutting portion 31 so that the abutting portion 31 reserves a 15% compression amount, ensuring that after tightening and installation, in a high-pressure, strong alkaline liquid environment (such as a 70% sodium hydroxide solution at 0.5 MPa), the liquid will not enter the interior of the microwave switch and corrode the circuit board 50.

[0046] In addition, threaded installation is adopted between the mounting portion 21 and the second shell 12 , and between the second shell 12 and the first shell 11 , which can also play a certain degree of sealing role and prevent external liquid from penetrating into the microwave switch.

[0047] During operation of the microwave switch, the temperature of the circuit board 50 rises, reaching 170°C without heat dissipation. By providing the heat dissipation structure 13 on the first housing 11, the temperature of the circuit board 50 can be controlled below 60°C, ensuring normal operation and safety of the circuit.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A microwave switch, characterized in that: The device comprises a shell, a probe, a mounting piece, an antenna and a circuit board. The probe is sealed and mounted on one end of the shell through the mounting piece. The circuit board is arranged inside the shell. The antenna is arranged inside the probe and is connected to the circuit board.

2. The microwave switch according to claim 1, wherein: One end of the probe extends radially to form an abutting portion, and the abutting portion is fixed between the housing and the mounting member.

3. The microwave switch according to claim 2, characterized in that: The mounting member includes a mounting portion and a fixing portion connected to each other, the abutting portion is fixed between the shell and the fixing portion, and the mounting portion is fixedly mounted to the shell.

4. The microwave switch according to claim 3, characterized in that: The inner wall of the mounting portion is provided with an internal thread, and the outer side of the shell is correspondingly provided with an external thread, and the mounting portion is threadedly connected to the shell.

5. The microwave switch according to claim 1, wherein: The shell is made of nickel; and / or The material of the probe is PFA; and / or The material of the mounting piece is nickel.

6. The microwave switch according to claim 1, wherein: The housing includes a first shell and a second shell. The first shell is fixedly mounted on one end of the second shell, and the probe is mounted on the other end of the second shell.

7. The microwave switch according to claim 6, characterized in that: The first shell is threadedly connected to one end of the second shell.

8. The microwave switch according to claim 1, wherein: The shell is provided with a heat dissipation structure.

9. The microwave switch according to claim 1, wherein: The microwave switch further includes a grounding connector, which is disposed inside the housing and connected to the circuit board and the housing.

10. The microwave switch according to claim 1, wherein: The microwave switch further comprises a copper rod, which is arranged inside the shell, and the antenna is connected to the circuit board via the copper rod.

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