A modular reed switch inductive limit switch

Abstract

The utility model relates to the technical field of limit switches, and in particular to a modular reed switch inductive limit switch. It comprises a base, a shaft sleeve is arranged in the base, a sensing disc assembly is movably arranged in the shaft sleeve, a modular assembly is also arranged in the base, an upper cover is fixedly arranged on the base, a sealing ring is also arranged between the base and the upper cover, a field indicator is arranged at the bottom of the sensing disc assembly through a lower retaining spring, and a transparent cover is arranged on the field indicator. This allows both on-site viewing and remote observation of the opening and closing states of various valve pipelines.

Description

Technical Field

[0001] The utility model relates to the technical field of limit switches, in particular to a modular reed switch inductive limit switch. Background Art

[0002] With the development of industrial automation technology, automation instruments play a vital role in the entire industrial automation system. There are a lot of pipelines and valves in the industrial equipment system, but it is necessary to know the opening and closing status of each valve or pipeline. If you observe them one by one on site, it will not only be time-consuming and laborious, but also very inefficient. At this time, an instrument that can adapt to industrial automation is needed, which can be used for on-site viewing and remote observation of the opening and closing status of each valve and pipeline. Utility Model Content

[0003] The utility model aims to provide a modular dry reed switch inductive limit switch, so as to achieve on-site inspection and remote observation of the opening and closing status of each valve pipeline.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution, which includes a base, a shaft sleeve is arranged in the base, a sensing disk assembly is movably arranged in the shaft sleeve, a modular assembly is also arranged in the base, an upper cover is fixedly arranged on the base, a sealing ring is also arranged between the base and the upper cover, a field indicator is arranged at the bottom of the sensing disk assembly through a lower retaining spring, and a transparent cover is provided on the field indicator.

[0005] As a preferred embodiment of the utility model, the induction disc assembly includes a transmission shaft movably arranged in a sleeve, and several sealing rings 2 are also arranged between the transmission shaft and the sleeve. The transmission shaft is arranged on the base through an upper retaining spring and a middle retaining spring. An induction sector disc is also arranged on the transmission shaft through a locating pin, and a target sensing object is movably arranged on the induction sector disc.

[0006] As a preferred embodiment of the present invention, the modular components are divided into a single-pole reed switch module group and a double-pole reed switch module group, and the single-pole reed switch module group and the double-pole reed switch module group are replaceably installed.

[0007] As a preferred embodiment of the utility model, the single-pole reed switch module group includes a base plate one which is detachably arranged inside the base, a module housing one is arranged on the base plate one, connection terminals one are symmetrically arranged on both sides of the module housing one, and a plurality of single-pole reed switches are arranged on the module housing one.

[0008] As a preferred embodiment of the utility model, the single-pole reed switch includes a first metal shell arranged on a module shell one, a first inner shell is arranged in the first metal shell, a glass tube is arranged in the first inner shell, a pin one is arranged at the bottom of the glass tube, an NC reed is arranged at one end of the pin one arranged in the glass tube, a pin two is also arranged at the bottom of the glass tube, a COM reed is arranged at one end of the pin two arranged in the glass tube, a curved pin is arranged at the top of the glass tube, and an NO reed is arranged at one end of the curved pin arranged in the glass tube.

[0009] As a preferred embodiment of the utility model, the double-pole reed switch module group includes a bottom plate 2 that is detachably arranged in the base, a module housing 2 is arranged on the bottom plate 2, several connection terminals 2 are symmetrically arranged on both sides of the module housing 2, and several double-pole reed switches are arranged on the module housing 2.

[0010] As a preferred embodiment of the utility model, the double-pole reed switch includes a second metal shell arranged on the second module housing, a second inner shell is arranged in the second metal shell, and a plurality of reed switches are arranged in the second inner shell.

[0011] As a preferred embodiment of the present invention, the module housing 1, the first metal housing module housing 2 and the second metal housing are all filled with epoxy resin.

[0012] As a preferred embodiment of the present invention, the glass tube is filled with an inert gas.

[0013] Compared with the prior art, the above technical solution of the utility model has the following beneficial technical effects:

[0014] The utility model fully protects the modular components by arranging the modular components in the base and the upper cover and sealing them with a sealing ring, thereby improving the application range and life of the product, and can be used in various severe working conditions such as dangerous gas, dust environment, humid, polluted medium environment, corrosive environment, etc.

[0015] The utility model ensures that the switch has extremely superior performance in harsh working conditions such as the seabed, humid, corrosive and explosive environments by arranging the single-pole reed switch and the double-pole reed switch in the first metal housing and the second metal housing respectively.

[0016] The utility model improves the sealing performance of the product by arranging one or more sealing rings 2 between the transmission shaft and the shaft sleeve.

[0017] The utility model is convenient for installation, maintenance and replacement by arranging modular components.

[0018] The utility model can protect the switch contacts and increase the service life of the product by filling the inert gas inside the glass tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the induction disc assembly of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of a single-pole reed switch module group of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of a double-pole reed switch module group of the utility model;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of a single-pole reed switch of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the single-pole reed switch of the utility model after the first metal shell is removed;

[0025] Figure 7 This is a schematic diagram of the internal structure of the reed switch of the utility model;

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of the double-pole reed switch of the utility model.

[0027] Reference numerals: upper cover 1, induction disc assembly 2, transmission shaft 20, induction sector disc 21, positioning pin 22, sealing ring 2 23, upper retaining spring 24, target sensing object 25, modular assembly 3, single-pole reed switch module group 30, single-pole reed switch 300, first metal shell 3000, first inner shell 3001, reed switch 3002, glass tube 30020, pin 1 30021, NC reed 30022, pin 2 30023, COM reed 30024, NO reed 30025, curved pin 30026, terminal 1 301, bottom plate 1 302, module housing 1 303, double-pole reed switch module group 31, double-pole reed switch 310, second metal shell 3100, second inner shell 3101, terminal 2 311, bottom plate 2 312, module housing 2 313, bushing 4, sealing ring 1 5, base 6, transparent cover 7, field indicator 8, lower retaining spring 9, middle retaining spring 10. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0029] like Figure 1 As shown, the utility model proposes a modular reed switch inductive limit switch, which includes a base 6, a shaft sleeve 4 is arranged in the base 6, a sensing disk assembly 2 is movably arranged in the shaft sleeve 4, a modular assembly 3 is also arranged in the base 6, an upper cover 1 is fixedly arranged on the base 6, a sealing ring 5 is also arranged between the base 6 and the upper cover 1, a field indicator 8 is arranged at the bottom of the sensing disk assembly 2 through a lower retaining spring 9, and a transparent cover 7 is provided on the field indicator 8.

[0030] like Figure 2 As shown, the induction disc assembly 2 includes a transmission shaft 20 movably arranged in a shaft sleeve 4, and a plurality of sealing rings 23 are arranged between the transmission shaft 20 and the shaft sleeve 4. The transmission shaft 20 is arranged on the base 6 through an upper retaining spring 24 and a middle retaining spring 10. An induction sector disc 21 is also arranged on the transmission shaft 20 through a positioning pin 22, and a target sensing object 25 is movably arranged on the induction sector disc 21.

[0031] like Figure 3-Figure 8As shown, the modular assembly 3 is divided into a single-pole reed switch module group 30 and a double-pole reed switch module group 31, and the single-pole reed switch module group 30 and the double-pole reed switch module group 31 are interchangeably installed; the single-pole reed switch module group 30 includes a bottom plate 302 detachably arranged inside the base 6, a module housing 303 is arranged on the bottom plate 302, and wiring terminals 301 are symmetrically arranged on both sides of the module housing 303, and a plurality of single-pole reed switches 300 are arranged on the module housing 303. The single-pole reed switch 300 includes a first metal shell 3000 disposed on a module housing 1 303, a first inner shell 3001 disposed in the first metal shell 3000, a glass tube 30020 disposed in the first inner shell 3001, a pin 1 30021 disposed at the bottom of the glass tube 30020, an NC reed 30022 disposed at one end of the pin 1 30021 disposed in the glass tube 30020, and a pin 2 30023 disposed at the bottom of the glass tube 30020, and the pin 2 30023 A COM reed 30024 is arranged at one end of the glass tube 30020, a curved pin 30026 is arranged at the top of the glass tube 30020, and a NO reed 30025 is arranged at one end of the curved pin 30026 arranged in the glass tube 30020; the double-pole reed switch module group 31 includes a bottom plate 2 312 detachably arranged in the base 6, a module housing 2 313 is arranged on the bottom plate 2 312, and a plurality of connection terminals 2 311 are symmetrically arranged on both sides of the module housing 2 313, Several double-pole reed switches 310 are arranged on the module housing 2 313; the double-pole reed switch 310 includes a second metal shell 3100 arranged on the module housing 2 313, a second inner shell 3101 is arranged in the second metal shell 3100, and several reed switches 3002 are arranged in the second inner shell 3101; the module housing 1 303, the first metal shell 3000, the module housing 2 313 and the second metal shell 3100 are all filled with epoxy resin; the glass tube 30020 is filled with inert gas.

[0032] When in use, firstly, the external rotary motion device is directly connected to the transmission shaft 20, and the rotary motion of the external device is converted into the rotary motion of the sensing sector disk 21 inside the limit switch through the transmission shaft 20. The single-pole reed switch 300 or the double-pole reed switch 310 is triggered by the rotation of the sensing sector disk 21, thereby realizing the conversion of electrical signals; the single-pole reed switch 300 is connected to the user monitoring cable through the wiring terminal, and the position signal is output as an electrical signal, thereby realizing the remote observation of the valve pipeline opening and closing state; the double-pole reed switch 310, similarly, is connected to the user monitoring cable through the wiring terminal, and the position signal is output as an electrical signal, thereby realizing the remote observation of the valve pipeline opening and closing state; the double-pole reed switch limit switch design enables more groups of electrical signals to be transmitted in equipment with limited space; the field indicator 8 rotates synchronously with the transmission shaft 20, and the indicator plate (such as OPEN / COLOSED) of the field indicator 8 can display the current switch position state, which is convenient for on-site observation.

[0033] Principle of reed switch 3002: When there is an external magnetic field approaching, NO reed 30025 and COM reed 30024 are magnetized and attract each other, COM reed 30024 and NO reed 30025 are connected, disconnected from NC reed 30022, and output electrical signals through pins; when there is no external magnetic field, COM reed 30024 and NC reed 30022 are connected, disconnected from NO reed 30025, and output electrical signals through pins; according to the principle that the same poles of magnets repel each other and the opposite poles attract each other, and the size of the magnetic force, the switch action is triggered when the target sensing object 25 reaches the sensing point, and an electrical signal is output. There is no mechanical contact between the sensing object and the switch, and the principle that the same poles of magnets repel each other and the opposite poles attract each other is used to realize the inductive switch action without power supply and extra energy loss.

[0034] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A modular reed switch inductive limit switch, comprising a base (6), wherein a sleeve (4) is arranged in the base (6), and characterized in that: An induction disc assembly (2) is movably arranged in the shaft sleeve (4), a modular assembly (3) is also arranged in the base (6), an upper cover (1) is fixedly arranged on the base (6), a sealing ring (5) is also arranged between the base (6) and the upper cover (1), a field indicator (8) is arranged at the bottom of the induction disc assembly (2) via a lower retaining spring (9), and a transparent cover (7) is arranged on the upper cover of the field indicator (8).

2. A modular reed switch inductive limit switch according to claim 1, characterized in that: The induction disc assembly (2) comprises a transmission shaft (20) movably arranged in a shaft sleeve (4), a plurality of sealing rings (23) being arranged between the transmission shaft (20) and the shaft sleeve (4), the transmission shaft (20) being arranged on a base (6) via an upper retaining spring (24) and a middle retaining spring (10), an induction sector disc (21) being arranged on the transmission shaft (20) via a positioning pin (22), and a target sensing object (25) being movably arranged on the induction sector disc (21).

3. A modular reed switch inductive limit switch according to claim 2, characterized in that: The modular assembly (3) is divided into a single-pole reed switch module group (30) and a double-pole reed switch module group (31), and the single-pole reed switch module group (30) and the double-pole reed switch module group (31) are interchangeably installed.

4. A modular reed switch inductive limit switch according to claim 3, characterized in that: The single-pole reed switch module group (30) comprises a base plate (302) detachably arranged inside a base (6), a module housing (303) being arranged on the base plate (302), wiring terminals (301) being symmetrically arranged on both sides of the module housing (303), and a plurality of single-pole reed switches (300) being arranged on the module housing (303).

5. A modular reed switch inductive limit switch according to claim 4, characterized in that: The single-pole reed switch (300) comprises a first metal shell (3000) arranged on a module housing (303), a first inner shell (3001) being arranged in the first metal shell (3000), a glass tube (30020) being arranged in the first inner shell (3001), a pin (30021) being arranged at the bottom of the glass tube (30020), and an NC A reed (30022), a second pin (30023) is further provided at the bottom of the glass tube (30020), a COM reed (30024) is provided at one end of the second pin (30023) arranged in the glass tube (30020), a curved pin (30026) is provided at the top of the glass tube (30020), and a NO reed (30025) is provided at one end of the curved pin (30026) arranged in the glass tube (30020).

6. A modular reed switch inductive limit switch according to claim 5, characterized in that: The double-pole reed switch module group (31) comprises a second bottom plate (312) detachably arranged in a base (6), a second module housing (313) being arranged on the second bottom plate (312), a plurality of second wiring terminals (311) being symmetrically arranged on both sides of the second module housing (313), and a plurality of double-pole reed switches (310) being arranged on the second module housing (313).

7. A modular reed switch inductive limit switch according to claim 6, characterized in that: The double-pole reed switch (3002) comprises a second metal shell (3100) arranged on the second module shell (313), a second inner shell (3101) is arranged in the second metal shell (3100), and a plurality of reed switches (3002) are arranged in the second inner shell (3101).

8. A modular reed switch inductive limit switch according to claim 7, characterized in that: The module housing 1 (303), the first metal housing (3000), the module housing 2 (313) and the second metal housing (3100) are all filled with epoxy resin.

9. A modular reed switch inductive limit switch according to claim 8, characterized in that: The glass tube (30020) is filled with an inert gas.

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