CN213021729U

CN213021729U - Flowmeter cover

Info

Publication number: CN213021729U
Application number: CN202022455055.5U
Authority: CN
Inventors: 刘新发; 肖卫兵
Original assignee: Ningbo Rooma Electric Co ltd
Current assignee: Ningbo Rooma Electric Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-04-20
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a cover of a flowmeter, including covering the body, cover the body and have a recess, there is a hall sensor that receives the magnetic field change of magnet and output the signal of telecommunication in the recess, the bottom of the square needle of three metals of transmission power and signal of telecommunication is connected with hall sensor electricity through the stitch, there is an apron above the recess, there is the plug pin seat that equals with metal contact pin quantity and is equipped with the first through-hole that the plug metal contact pin used on the apron, there is a PCB board in the recess, PCB board and metal contact pin bottom mounting and electricity are connected, hall sensor's stitch and PCB board mounting and electricity are connected; the cover plate is in threaded connection with the cover body; the cover body is provided with two guide posts, and the cover plate is provided with two second through holes in sliding fit with the guide posts. The utility model discloses the lid of flowmeter, its metal contact pin is reliable with hall sensor's electricity is connected, and the assembly is convenient with the dismantlement between the apron of recess and the lid body.

Description

Flowmeter cover

Technical Field

The utility model relates to a flowmeter makes technical field, specifically says a lid of flowmeter.

Background

The flow meters are of various types and have different structures. For example, european patent application publication No. EP2056075a2 discloses a worm-gear flow meter, which includes an injection-molded cover or upper cover and an injection-molded casing, the casing and the cover are detachably connected, for example, by using clamping blocks to clamp each other, the cover is provided with a water outlet pipe, the casing is provided with a water inlet pipe, an impeller which can be impelled by liquid to rotate is arranged in a cavity of the casing, and the impeller is provided with a magnet. The cover comprises a cover body, a groove is formed in the cover body, a Hall sensor which receives the magnetic field change of the magnet and outputs an electric signal is also called as a Hall element, the magnet outputs an electric signal every turn of the Hall sensor, the bottom ends of a plurality of metal contact pins of a transmission power supply and the electric signal are electrically connected with the Hall sensor through pins, an cover plate is arranged above the groove for accommodating the Hall sensor, through holes which are equal to the number of the metal contact pins and used for inserting the metal contact pins are formed in the cover plate, and a plurality of plug boards are arranged on the cover plate.

However, the above prior art flow meter covers suffer from the following disadvantages: 1. the cover plate and the cover body of the Hall sensor are connected by two additionally-arranged plug boards which are mutually inserted and buckled, so that the structure not only increases the difficulty of installation and disassembly and makes the installation and disassembly troublesome, but also increases the material cost. 2. The bottom end of the metal contact pin is electrically connected with the Hall sensor by inserting the metal contact pin into the same jack in a one-to-one correspondence manner and pins of the Hall sensor so as to be in contact with the Hall sensor for conducting electricity, but in actual operation, the metal contact pin and the pins are difficult to align in the inserting process, and particularly, the metal contact pin and the pins are hard extruded into the same jack, so that the pins are easy to damage, or the electric contact between the metal contact pin and the pins is unreliable.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a metal contact pin is connected reliably with hall sensor's electricity, the apron of recess and is covered the lid of the convenient flowmeter of assembly and dismantlement between the body.

The technical solution of the utility model is to provide a cover of a flowmeter, including the lid body, there is a recess on the lid body, there is a hall sensor in the recess, the bottom of many metal contact pins of transmission power and signal of telecommunication is connected with hall sensor electricity, there is an apron above the recess, there is the first through-hole that equals with metal contact pin quantity and is used for pegging graft metal contact pin on the apron, there is a PCB board in the recess, PCB board and metal contact pin bottom are fixed and electrically connected, the stitch of hall sensor is fixed and electrically connected with PCB board; the cover plate is in threaded connection with the cover body.

After the structure above the adoption, the utility model relates to a flowmeter's lid has following advantage: because the metal contact pin is fixed with the PCB and the pin of the Hall sensor, the metal contact pin is electrically connected with the Hall sensor through the PCB and the pin, during installation, a plurality of metal contact pins which are fixed with the PCB and the Hall sensor into a whole are respectively inserted into respective first through holes, the fixed metal contact pin, the PCB and the Hall sensor which are fixed into a whole are placed into the groove, the cover plate is covered at the top of the groove, and then the cover plate of the groove is in threaded connection with the cover body. The structure does not need to be aligned, the connection is very convenient, the assembly and the disassembly are very simple, convenient and fast because the cover plate is in threaded connection with the cover body, and simultaneously, the material cost of the two inserting blocks is saved. And because the metal contact pin is fixed and electrically connected with the PCB and the Hall sensor, the pin can not be damaged, and the connection stability and firmness and the electrical connection reliability are ensured.

Furthermore, the number of the metal contact pins is three, one metal contact pin transmits an electric signal, the other metal contact pin is a power supply anode, the other metal contact pin is a power supply cathode, the cross section of each metal contact pin is rectangular, and the cross section of each first through hole is also rectangular; the stitch of the Hall sensor is three corresponding to the three metal contact pins one by one: one for transmitting electric signals, one for the positive pole of the power supply and one for the negative pole of the power supply. After the structure is adopted, the metal contact pin and the first through hole have better axial guidance performance and better circumferential positioning performance; the pin of the Hall sensor is connected with the PCB and the metal contact pin, so that the pertinence and the reliability are higher.

Furthermore, the PCB is provided with three holes, the bottom ends of the three rectangular metal contact pins are inserted into the respective holes, and the bottom ends of the metal contact pins are welded with the PCB at the edge of the holes; the cross section of each pin is also rectangular, three holes are formed in the PCB, and the free ends of the three pins of the Hall sensor are inserted into the respective holes and are welded with the PCB at the edge of the holes. After the structure more than adopting, the free end and the PCB board welding of three stitches, the other end and hall sensor are originally just fixed, and the metal contact pin is fixed more firm with being connected of PCB board, and the electricity is connected more reliably, and hall sensor's stitch and PCB board are fixed more firm with being connected, and the electricity is connected more reliably.

Furthermore, the cover body is provided with two guide posts, and the cover plate is provided with two second through holes in sliding fit with the two guide posts. After adopting above structure, the guidance quality of apron and lid body is better, and both installations are more convenient, swift.

Furthermore, the cover plate is provided with two third through holes, and two screws penetrate through the respective third through holes and are screwed in the two threaded holes on the cover body. After the concrete structure is adopted by the screw connection, the screw connection is adopted at one time instead of pre-embedding the bolt and screwing the nut, so that the assembly and the disassembly are simpler, more convenient and quicker.

Drawings

Fig. 1 is a schematic perspective view of a cover of the flow meter according to the present invention.

Fig. 2 is a schematic perspective view of the cover of the flow meter according to the present invention.

Fig. 3 is a schematic diagram of an explosion structure of the cover plate, the metal pins and the hall sensor according to the present invention.

Fig. 4 is a schematic diagram of an explosion structure of the cover plate, the metal pins and the hall sensor according to the present invention.

The structure of the LED lamp comprises a pin base 1, a pin base 2, a guide post 3, a cover body 4, a screw 5, a water outlet pipe 6, a cover plate 7, a metal pin 8, an insertion block 9, a clamping block 10, a first through hole 11, a third through hole 12, a PCB 13, a threaded hole 14, a groove 15, a Hall sensor 16, a second through hole 17 and a pin.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, 2, 3, and 4:

the prior art worm-gear flowmeter comprises an injection molded cover or upper cover and an injection molded casing (not shown in the casing figure), wherein the casing and the cover are detachably connected by clamping blocks. The cover is provided with a water outlet pipe 5, the shell is provided with a water inlet pipe, the cavity of the shell is internally provided with an impeller which can be driven by liquid to rotate, and the impeller is provided with a magnet.

The utility model discloses flowmeter's lid, including lid body 3. The cover body 3 is provided with a groove 14, and a Hall sensor 15 which receives the magnetic field change of the magnet and outputs an electric signal is arranged in the groove 14. The bottom ends of a plurality of metal pins 7 for transmitting power and electric signals are electrically connected with the Hall sensor 15. A cover plate 6 is arranged above the groove 14, and first through holes 10 which are equal to the number of the metal pins 7 and are used for inserting the metal pins 7 are arranged on the cover plate 6. The cover plate 6 can also be provided with plug pin seats 1 with the same number as the metal plug pins 7, and the first through holes 10 are positioned in the centers of the plug pin seats 1. The bottom of the cover body 3 is provided with a plurality of clamping blocks 9 which are distributed along the circumference and are used for being mutually clamped with the clamping blocks on the shell.

A PCB 12 is arranged in the groove 14, the PCB 12 is fixed and electrically connected with the bottom end of the metal pin 7, and a pin 17 of the Hall sensor 15 is fixed with the PCB 12 and electrically connected with the PCB 12. It will be understood that the metal pins 7 are electrically connected to the hall sensor 15 via the PCB board and pins 17.

The metal contact pins 7 are preferably three, one is used for transmitting electric signals, one is a power supply anode, the other is a power supply cathode, the cross section of each metal contact pin 7 is rectangular, and the cross section of each first through hole 10 is also rectangular. The pins 17 of the hall sensor 15 correspond to the three metal contact pins 7 one by one: one for transmitting electric signals, one for the positive pole of the power supply and one for the negative pole of the power supply.

The PCB 12 is provided with three holes, the bottom ends of three rectangular metal pins 7 are inserted into the respective holes, and the bottom ends of the metal pins 7 are welded with the PCB 12 at the edge of the holes. The cross section of each pin 17 is also rectangular, three holes are formed in the PCB 12, and the free ends of the three pins 17 of the Hall sensor 15 are inserted into the respective holes and are welded with the PCB 12 at the edge of the holes.

The cover body 3 is preferably provided with two guide posts 2, and the cover plate 6 is provided with two second through holes 16 which are in sliding fit with the two guide posts 2.

The cover plate 6 is screwed with the cover body 3. For example, the cover plate 6 has two third through holes 11, and two screws 4 are screwed into two threaded holes 13 on the cover body 3 through the respective third through holes 11.

The cover plate 6 can be a U-shaped main plate with a closed opening approximately, two symmetrical ear plates are arranged on two sides of the main plate, and the height of each ear plate can be lower than that of the main plate. The three pin seats 1 are arranged on the main board in a straight line, and the three clamping plates 8 are also arranged on the main board in a straight line, are parallel to the three pin seats 1 and are positioned at the outer sides of the three pin seats 1. The second through hole 16 and the third through hole 11 are both provided on the ear plate.

The hall sensor is also called a hall element. The PCB board is also called a printed circuit board. The pins 17 may also be referred to as metal wires. The rectangular metal pins 7 may also be referred to as a quad-pin.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a cover of flowmeter, includes and covers body (3), there is a recess (14) on lid body (3), there is a hall sensor (15) in recess (14), the bottom and the hall sensor (15) electricity of many metal contact pins (7) of transmission power and signal of telecommunication are connected, there is a apron (6) the top of recess (14), there is first through-hole (10) that equal and be used for grafting metal contact pin (7) with metal contact pin (7) quantity on apron (6), its characterized in that: a PCB (12) is arranged in the groove (14), the PCB (12) is fixed and electrically connected with the bottom end of the metal contact pin (7), and a pin (17) of the Hall sensor (15) is fixed and electrically connected with the PCB (12); the cover plate (6) is in threaded connection with the cover body (3).

2. The cover of a flow meter according to claim 1, wherein: the number of the metal contact pins (7) is three, one metal contact pin transmits an electric signal, the other metal contact pin is a power supply anode, the other metal contact pin is a power supply cathode, the cross section of each metal contact pin (7) is rectangular, and the cross section of each first through hole (10) is also rectangular; the pins (17) of the Hall sensor (15) are three pins which correspond to the three metal contact pins (7) one by one: one for transmitting electric signals, one for the positive pole of the power supply and one for the negative pole of the power supply.

3. The flowmeter cover of claim 2, wherein: the PCB (12) is provided with three holes, the bottom ends of three rectangular metal contact pins (7) are inserted into the respective holes, and the bottom ends of the metal contact pins (7) are welded with the PCB (12) at the edge of the holes; the cross section of each pin (17) is also rectangular, three holes are formed in the PCB (12), and the free ends of the three pins (17) of the Hall sensor (15) are inserted into the respective holes and are welded with the PCB (12) at the edge of the holes.

4. The cover of a flow meter according to claim 1, wherein: the cover body (3) is provided with two guide posts (2), and the cover plate (6) is provided with two second through holes (16) which are in sliding fit with the two guide posts (2).

5. The cover of a flow meter according to claim 1, wherein: the cover plate (6) is provided with two third through holes (11), and the two screws (4) penetrate through the respective third through holes (11) and are screwed in the two threaded holes (13) on the cover body (3).