阅读说明：本技术 一种双重绝缘流量计 (Double-insulation flowmeter ) 是由 毛恒毅 竺建军 于 2019-10-08 设计创作，主要内容包括：本发明提出了一种双重绝缘流量计,包括流量计外壳、设置于流量计外壳内部的叶轮组件、用以采集转动叶轮信号的传感器、与传感器电性连接的PCB板,所述流量计外壳的下方依次设有PCB绝缘套、底座,所述底座与流量计外壳卡装配合连接,所述PCB绝缘套安装于流量计外壳与底座之间的容腔内,所述流量计外壳的内部具有与PCB绝缘套相适配的卡装腔,所述PCB绝缘套的上部插装于卡装腔内,PCB绝缘套的上壁与卡装腔之间形成封闭区域,所述PCB绝缘套内具有用以安装传感器的内腔,所述PCB板安装于PCB绝缘套的底部。流量计外壳实现一次绝缘密封、PCB绝缘套实现二次绝缘密封,能够达到双重绝缘的效果,有效的提高了流量计的寿命。(The invention provides a double-insulation flowmeter which comprises a flowmeter shell, an impeller assembly, a sensor and a PCB, wherein the impeller assembly is arranged in the flowmeter shell, the sensor is used for collecting signals of a rotating impeller, and the PCB is electrically connected with the sensor. The flowmeter shell realizes primary insulation sealing and secondary insulation sealing of the PCB insulation sleeve, can achieve double insulation effect, and effectively prolongs the service life of the flowmeter.)

1. The utility model provides a dual insulation flowmeter, includes flowmeter shell (1), sets up in inside impeller subassembly (10) of flowmeter shell, is used for gathering sensor (100) of rotating impeller signal, with sensor (100) electric connection's PCB board (30), its characterized in that: the utility model discloses a flowmeter, including flowmeter shell (1), flowmeter core, base, PCB insulating cover (3), base (2) and flowmeter shell (1) clamp the cooperation and are connected, PCB insulating cover (3) are installed in the appearance intracavity between flowmeter shell (1) and base (2), the inside of flowmeter shell (1) has the dress chamber (14) of the dress chamber (14) with PCB insulating cover (3) looks adaptation, the upper portion cartridge of PCB insulating cover (3) is in dress chamber (14), forms closed region between the upper wall of PCB insulating cover (3) and dress chamber (14), the inner chamber that is used for installing sensor (100) has in PCB insulating cover (3), PCB board (30) are installed in the bottom of PCB insulating cover (3).

2. A double insulated flow meter as set forth in claim 1, wherein: be equipped with in flowmeter shell (1) with the communicating impeller wheel room (11) of flowmeter water inlet, play water passage, install impeller wheel subassembly (10) in impeller wheel room (11), the bilateral symmetry of impeller wheel room (11) is equipped with first installation room (12), first installation room (12) inside has chucking chamber (14), be equipped with two bellied sensor installation room (32) that upwards extend on PCB insulation cover (3), sensor installation room (32) cartridge is in chucking chamber (14), is formed with the cavity with impeller wheel room (11) looks adaptation between two sensor installation room (32), have the appearance chamber that is used for installing PCB board (30) between the bottom of PCB insulation cover (3) and base (2).

3. A double insulated flow meter as set forth in claim 1, wherein: the bilateral symmetry of base (2) is equipped with cardboard (22) of cooperation installation with flowmeter shell (1), the inner wall of cardboard (22) is equipped with inside bellied card foot (221), the bilateral symmetry of flowmeter shell (1) is equipped with spacing ladder portion (13), cardboard (22) and spacing ladder portion (13) looks snap fit, the lower terminal surface of card foot (221) offsets with the up end of spacing ladder portion (13) and leans on the cooperation.

4. A double insulated flow meter as set forth in claim 1, wherein: the PCB insulation sleeve (3) comprises an insulation sleeve shell (31) and a sensor installation chamber (32), wherein the insulation sleeve shell (31) is internally provided with two sensor installation chambers (32) which extend upwards and protrude, an installation cavity (301) with a downward opening and used for installing a sensor (100) is arranged in each sensor installation chamber (32), a plurality of supporting units (21) used for supporting the insulation sleeve shell (31) are arranged in an inner cavity of the base (2), the lower end face of the insulation sleeve shell (31) is propped against and matched with the upper end face of each supporting unit (21), the two sides of the flowmeter shell (1) are symmetrically provided with limit step parts (13), the lower end face of each limit step part (13) is propped against and matched with the upper end face of the insulation sleeve shell (31), and an insertion cavity (300) for inserting the lower end of the flowmeter shell (1) is arranged between the inner wall of the insulation sleeve shell (31) and the periphery of the sensor installation chamber (32), the plug-in cavity (300) has an opening facing the flowmeter housing (1).

5. A double insulated flow meter as set forth in claim 4, wherein: the supporting units (21) are arranged at intervals along the length direction of the PCB (30), each group of supporting units (21) is composed of two supporting bodies symmetrically arranged on two sides of the PCB (30), and a gap matched with the PCB (30) is formed between the two supporting bodies.

6. A double insulated flow meter as set forth in any of claims 1-5, wherein: the PCB is characterized in that inclined leading-in portions (311) are symmetrically arranged on two sides of the PCB insulating sleeve (3), and installation clamping grooves (312) matched with the PCB (30) are formed in the bottom of the PCB insulating sleeve (3).

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of flowmeters, in particular to a double-insulation flowmeter.

[ background of the invention ]

The flowmeter mainly comprises a cylindrical flowmeter shell, wherein an impeller assembly, an inductor and an induction element which is arranged on the impeller assembly and matched with the inductor are arranged in the shell. The metering process of the flowmeter is as follows: after fluid enters a flowmeter shell, impeller blades of an impeller assembly arranged in the shell are rotated under the action of the flowing force of the fluid, the impeller blades trigger a sensing element at the same time, the sensing element outputs an impeller rotation frequency signal to a signal processing device arranged outside the flowmeter shell, and the signal is processed and displayed on a display device so as to achieve the purpose of metering. The national standard GB4706.1-2008, section 22.33, states that for class ii structures, conductive liquids that are or may become accessible in normal use should not be in direct contact with the primary insulation or the reinforcing insulation. Because water is an easily accessible conductive liquid, the impeller of the existing flowmeter is basically insulated only by adopting an impeller shell, and an isolated power supply is adopted by an inductor circuit; when the flowmeter power supply uses a low cost non-isolated power supply, the flowmeter must conform to double isolation. A double insulated flow meter is now proposed.

[ summary of the invention ]

The invention aims to solve the problems in the prior art and provides a double-insulation flowmeter which has the effect of double sealing insulation.

In order to achieve the purpose, the invention provides a double-insulation flowmeter which comprises a flowmeter shell, an impeller assembly, a sensor and a PCB, wherein the impeller assembly is arranged in the flowmeter shell, the sensor is used for collecting signals of a rotating impeller, the PCB is electrically connected with the sensor, a PCB insulation sleeve and a base are sequentially arranged below the flowmeter shell, the base is connected with the flowmeter shell in a clamping fit mode, the PCB insulation sleeve is arranged in a containing cavity between the flowmeter shell and the base, a clamping cavity matched with the PCB insulation sleeve is formed in the flowmeter shell, the upper portion of the PCB insulation sleeve is inserted into the clamping cavity, a closed area is formed between the upper wall of the PCB insulation sleeve and the clamping cavity, an inner cavity used for mounting the sensor is formed in the PCB insulation sleeve, and the PCB is arranged at the bottom of the PCB insulation sleeve.

Preferably, an impeller chamber communicated with a water inlet channel and a water outlet channel of the flowmeter is arranged in the flowmeter shell, an impeller assembly is installed in the impeller chamber, first installation chambers are symmetrically arranged on two sides of the impeller chamber, a clamping cavity is formed in each first installation chamber, two sensor installation chambers protruding upwards are arranged on the PCB insulating sleeve, the sensor installation chambers are inserted into the clamping cavities, a concave cavity matched with the impeller chamber is formed between the two sensor installation chambers, and a containing cavity used for installing a PCB is formed between the bottom of the PCB insulating sleeve and the base.

Preferably, clamping plates which are matched and installed with the flowmeter shell are symmetrically arranged on two sides of the base, clamping pins which protrude inwards are arranged on the inner wall of each clamping plate, limiting step parts are symmetrically arranged on two sides of the flowmeter shell, the clamping plates are matched with the limiting step parts in a clamping mode, and the lower end faces of the clamping pins abut against and are matched with the upper end faces of the limiting step parts.

Preferably, the PCB insulating sleeve comprises an insulating sleeve shell and a sensor installation chamber, two sensor installation chambers extending upwards are arranged in the insulating sleeve shell, an installation cavity with a downward opening is formed in each sensor installation chamber and used for installing a sensor, a plurality of supporting units used for supporting the insulating sleeve shell are arranged in an inner cavity of the base, the lower end face of the insulating sleeve shell is abutted against and matched with the upper end face of each supporting unit, limiting step parts are symmetrically arranged on two sides of the flowmeter shell, the lower end face of each limiting step part is abutted against and matched with the upper end face of the insulating sleeve shell, an insertion cavity for inserting the lower end of the flowmeter shell is formed between the inner wall of the insulating sleeve shell and the periphery of the sensor installation chamber, and the insertion cavity is provided with an opening facing the flowmeter shell.

Preferably, the supporting units are arranged at intervals along the length direction of the PCB, each group of supporting units consists of two supporting bodies symmetrically arranged on two sides of the PCB, and a gap matched with the PCB is formed between the two supporting bodies.

Preferably, inclined leading-in portions are symmetrically arranged on two sides of the PCB insulating sleeve, and mounting clamping grooves matched with the PCB are formed in the bottom of the PCB insulating sleeve.

The invention has the beneficial effects that: according to the invention, the PCB insulation sleeve and the base are sequentially arranged below the flowmeter shell, the primary insulation sealing of the impeller chamber is realized, the secondary insulation sealing of the PCB insulation sleeve below the impeller chamber is realized, and the double insulation effect can be achieved, so that when a low-cost non-isolated power supply is adopted as a flowmeter power supply, the national standard requirement is met, and the electric shock protection of a user is effectively improved.

The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.

[ description of the drawings ]

FIG. 1 is an exploded view of a double insulated flow meter according to the present invention;

FIG. 2 is a schematic perspective view of a double insulated flow meter according to the present invention;

FIG. 3 is a schematic front view of a double insulated flow meter of the present invention;

FIG. 4 is a schematic cross-sectional view of a double insulated flow meter of the present invention taken along line C-C;

FIG. 5 is a schematic diagram of the PCB insulating sleeve of a double insulated flow meter of the present invention;

FIG. 6 is a schematic cross-sectional view of the pedestal of a double insulated flow meter of the present invention taken along line C-C.

[ detailed description ] embodiments

Referring to fig. 1 to 4, the dual insulation flowmeter of the present invention includes a flowmeter housing 1, an impeller assembly 10 disposed inside the flowmeter housing, a sensor 100 for collecting signals of a rotating impeller, and a PCB 30 electrically connected to the sensor 100, wherein a PCB insulation sleeve 3 and a base 2 are sequentially disposed below the flowmeter housing 1, the base 2 is connected to the flowmeter housing 1 in a clamping manner, the PCB insulation sleeve 3 is mounted in a cavity between the flowmeter housing 1 and the base 2, a clamping cavity 14 adapted to the PCB insulation sleeve 3 is disposed inside the flowmeter housing 1, an upper portion of the PCB insulation sleeve 3 is inserted into the clamping cavity 14, a closed region is formed between an upper wall of the PCB insulation sleeve 3 and the clamping cavity 14, an inner cavity for mounting the sensor 100 is disposed inside the PCB insulation sleeve 3, and the PCB 30 is mounted at a bottom of the PCB insulation sleeve 3.

Further, referring to fig. 3 and 4, an impeller chamber 11 communicated with a water inlet channel and a water outlet channel of the flowmeter is arranged in the flowmeter housing 1, an impeller assembly 10 is installed in the impeller chamber 11, first installation chambers 12 are symmetrically arranged on two sides of the impeller chamber 11, a clamping cavity 14 is arranged in each first installation chamber 12, two sensor installation chambers 32 protruding upwards are arranged on the PCB insulation sleeve 3, the sensor installation chambers 32 are inserted into the clamping cavities 14, a concave cavity matched with the impeller chamber 11 is formed between the two sensor installation chambers 32, and a containing cavity for installing a PCB 30 is arranged between the bottom of the PCB insulation sleeve 3 and the base 2. A sealed chamber can be formed between the PCB insulation sleeve and the impeller chamber to prevent leaking fluid from entering the inner cavity of the sensor mounting chamber.

Further, referring to fig. 4 and 6, clamping plates 22 installed in cooperation with the flowmeter housing 1 are symmetrically arranged on two sides of the base 2, clamping pins 221 protruding inwards are arranged on the inner wall of the clamping plates 22, limiting step parts 13 are symmetrically arranged on two sides of the flowmeter housing 1, the clamping plates 22 are in clamping fit with the limiting step parts 13, and the lower end faces of the clamping pins 221 are abutted against and matched with the upper end faces of the limiting step parts 13, so that the base and the flowmeter housing are convenient to install and detach.

Further, referring to fig. 4 to 6, the PCB insulation case 3 includes an insulation case housing 31, a sensor mounting chamber 32, the inside of the insulating sheath housing 31 has two upwardly extending convex sensor mounting chambers 32, the sensor mounting chamber 32 has a mounting cavity 301 opened downward for mounting the sensor 100 therein, a plurality of supporting units 21 for supporting the insulating sleeve shell 31 are arranged in the inner cavity of the base 2, the lower end surface of the insulating sleeve shell 31 is abutted and matched with the upper end surface of the supporting unit 21, the two sides of the flowmeter shell 1 are symmetrically provided with limiting step parts 13, the lower end surface of the limit step part 13 is abutted and matched with the upper end surface of the insulating sleeve shell 31, between the inner wall of the insulating sheath housing 31 and the outer periphery of the sensor mounting chamber 32, there is a plug-in cavity 300 into which the lower end of the flowmeter housing 1 is inserted, the plug-in cavity 300 having an opening facing the flowmeter housing 1. The supporting units 21 are arranged at intervals along the length direction of the PCB 30, each group of supporting units 21 is composed of two supporting bodies symmetrically arranged on two sides of the PCB 30, and a gap matched with the PCB 30 is formed between the two supporting bodies. Carry out the bearing to insulating cover casing through the support element, the spacing ladder portion of flowmeter shell presses insulating cover casing, guarantees that insulating cover casing installation is firm, support stably. The PCB insulating sleeve 3 is symmetrically provided with inclined leading-in parts 311 at two sides, and the bottom of the PCB insulating sleeve 3 is provided with an installation clamping groove 312 matched with the PCB 30. The leading-in part is convenient to install quickly, and the installation clamping groove is convenient to install and position the PCB.

The working process of the invention is as follows:

according to the double-insulation flowmeter, the impeller chamber can realize primary insulation sealing, a closed area is formed between the upper wall of the PCB insulation sleeve and the flowmeter shell, secondary insulation sealing is realized, and a double-insulation effect can be achieved, so that when a flowmeter power supply adopts a low-cost non-isolated power supply, the national standard requirement is met, and the electric shock protection of a user is effectively improved.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.