CN214502549U - Water flow sensor - Google Patents

Abstract

The utility model relates to a water flow sensor, include: the magnetic rotor assembly comprises a shell, a magnetic rotor assembly, a Hall element and a bolt. A flow passage for liquid to flow is arranged in the shell. The outer side of the shell is convexly provided with a clamping seat. The clamping seat is provided with a slot, a first pin hole and a second pin hole. The slot is parallel to the flow passage. The magnetic rotor assembly includes: an impeller rotor accommodated in the flow passage and a magnet attached to the impeller rotor. The Hall element is inserted in the slot and provided with a third pin hole and a fourth pin hole. The third pin hole and the first pin hole are on the same straight line. The fourth pin hole and the second pin hole are in the same straight line. The bolt is an inverted U-shaped elastic pin. One end of the bolt penetrates through the first pin hole and the third pin hole. The other end of the bolt penetrates through the second pin hole and the fourth pin hole. Above-mentioned water flow sensor utilizes elastic bolt to lock hall element on the cassette of casing, satisfies the demand such as the strong reliability, the dismouting is simple and cost of maintenance is low.

Description

Water flow sensor

Technical Field

The utility model relates to a sensor technical field especially relates to a water flow sensor.

Background

The water flow sensor is a sensor for measuring liquid flow, and is commonly used for wall-hanging furnaces, water heaters, washing machines and other equipment. Generally, a water flow sensor includes: the magnetic rotor assembly comprises a shell, a magnetic rotor assembly and a Hall element. The shell is provided with a flow passage, the magnetic rotor component is provided with an impeller rotor which is contained in the liquid flow passage and provided with a magnet, and when liquid flows through the flow passage, the impeller rotor is pushed to rotate, so that the magnet rotates along with the impeller rotor, and a changing magnetic field is generated. The change of the magnetic field is detected by the Hall element, so that the change is converted into the calculation of the liquid flux.

In the conventional water flow sensor, in order to mount the hall element on the housing, there are generally two ways:

1. fix hall element on the casing through the mode of beating the screw, its drawback lies in: firstly, in the process of screwing, the screw or the thread on the shell is easily damaged due to overlarge screw screwing torque, so that connection failure is caused, and the reliability is low. Secondly, when the hall element needs to be replaced, a screwdriver needs to be arranged, and once the situation of tooth slipping occurs, the dismounting is difficult. The above drawbacks occur more easily when the housing is of a plastic shell structure.

2. Add the plastic buckle in hall element's both sides to set up the bayonet socket that corresponds on the casing, be in the same place through plastic buckle and bayonet socket lock, realize that hall element is fixed with the casing joint, its drawback lies in: the plastic buckle is easy to deform and damage, and once the plastic buckle is damaged, the Hall element is scrapped and treated, so that the maintenance cost is very high.

Therefore, a novel water flow sensor needs to be developed, and the requirements of strong reliability, simple disassembly and assembly, low maintenance cost and the like are met.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a water flow sensor utilizes elastic bolt to lock hall element on the cassette of casing, satisfies the demand such as the good reliability, the dismouting is simple and cost of maintenance is low.

A water flow sensor comprising:

a housing; a flow passage for liquid to flow is arranged in the shell; the outer side of the shell is convexly provided with a clamping seat; the clamping seat is provided with a slot, a first pin hole and a second pin hole; the slot is parallel to the flow channel; the first pin hole and the second pin hole vertically penetrate through the slot from the outer side of the clamping seat and extend to the bottom of the clamping seat; the first pin hole is positioned at one side of the slot, and the second pin hole is positioned at the other opposite side of the slot;

a magnetic rotor assembly coupled to the housing; the magnetic rotor assembly includes: an impeller rotor accommodated in the flow passage and a magnet mounted on the impeller rotor;

a Hall element connected with the shell; the Hall element is inserted in the slot and provided with a third pin hole and a fourth pin hole; the third pin hole and the first pin hole are on the same straight line; the fourth pin hole and the second pin hole are in the same straight line; and

the bolt is connected between the shell and the Hall element; the bolt is an inverted U-shaped elastic pin; one end of the bolt penetrates through the first pin hole and the third pin hole; the other end of the bolt penetrates through the second pin hole and the fourth pin hole.

Above-mentioned water flow sensor, during the equipment, insert the slot of cassette with hall element in, insert the bolt in first pinhole and second pinhole after that, be in the same place hall element and cassette joint through the bolt for hall element's installation becomes very simple. Simultaneously, the bolt is the elastic pin of the type of falling U, and after the bolt installation finishes, the both ends of bolt can kick-back the inside wall of the first pinhole of extrusion and second pinhole for the bolt is difficult to drop, and consequently, hall element's installation steadiness is good, and the good reliability, and also can not lead to hall element to scrap the processing when the bolt damages, reduce cost of maintenance. When the dismounting device is used, the bolt is drawn out through external force, and then the Hall element is taken out from the slot, so that the dismounting of the Hall element is very simple. Through the design, the Hall element is locked on the clamping seat of the shell by utilizing the elastic bolt, and the requirements of strong reliability, simple disassembly and assembly, low maintenance cost and the like are met.

In one embodiment, the clamping seat is provided with a stopping part; the stopping part is positioned at the inner side of the slot and is arranged away from the inlet of the slot. The stopping part can limit the insertion depth of the Hall element in the bolt, so that the third pin hole is accurately aligned with the first pin hole, the fourth pin hole is accurately aligned with the second pin hole, the Hall element can be easily installed in place, the installation difficulty is reduced, and the installation precision is improved.

In one embodiment, the card holder is further provided with a notch communicated with the slot; the notch is positioned at the inner side of the slot and is arranged away from the inlet of the slot; the Hall element extends out of the card seat through the gap. When the Hall element needs to be disassembled, after the bolt is pulled away, a user can push the exposed part of the Hall element at the notch in the reverse direction, so that the Hall element can be easily ejected out of the slot, and the disassembling difficulty is reduced.

In one embodiment, the surfaces of the two ends of the pin are provided with relief. The burr can increase the both ends of bolt and the frictional force between first pinhole, the second pinhole, promotes the installation stability of bolt.

In one embodiment, the cross section of the Hall element along the connecting line direction of the third pin hole and the fourth pin hole is T-shaped. The Hall element with the T-shaped section is more convenient for a user to quickly distinguish the installation posture of the Hall element, plays a role in fool proofing, and improves the assembly efficiency and precision.

In one embodiment, the magnetic rotor assembly further comprises: a first bracket and a second bracket accommodated in the flow passage; the first bracket and the second bracket are detachably connected; the impeller rotor is pivoted between the first bracket and the second bracket. The first support and the second support are utilized to form a frame for installing the impeller rotor, so that the magnetic rotor assembly forms a modular component and penetrates into the flow channel along the inlet of the flow channel, and the installation difficulty is reduced.

In one embodiment, a limiting part is arranged in the shell; the limiting part is positioned on the inner wall of the flow channel to play a role in stopping and limiting the magnetic rotor assembly. The limiting part can enable the magnetic rotor assembly to accurately reach the specified installation position, and installation accuracy is improved.

In one embodiment, the outer side of the housing is provided with an arrow-like logo. The arrow-shaped mark facilitates the user to quickly identify the correct mounting direction of the housing, and reduces the risk that the inlet and the outlet of the flow channel are reversely connected.

Drawings

Fig. 1 is a perspective view of a water flow sensor according to an embodiment of the present invention;

FIG. 2 is a perspective view of the water flow sensor of FIG. 1 from another perspective;

FIG. 3 is a top view of the water flow sensor shown in FIG. 1;

FIG. 4 is a cross-sectional view taken along line A-A of the water flow sensor shown in FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of the water flow sensor shown in FIG. 3;

fig. 6 is an exploded view of the water flow sensor shown in fig. 3.

The meaning of the reference symbols in the drawings is:

100-water flow sensor;

10-shell, 11-runner, 12-mark, 13-clamping seat, 131-slot, 132-first pin hole, 133-second pin hole, 134-stopping part, 135-notch and 14-limiting part;

20-a magnetic rotor assembly, 21-an impeller rotor, 22-a first support, 23-a second support;

30-Hall element, 31-third pin hole, 32-fourth pin hole;

40-bolt.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1 to 6, it is a water flow sensor 100 according to an embodiment of the present invention.

As shown in fig. 1 to 4, the water flow sensor 100 includes: a housing 10, a magnetic rotor assembly 20 coupled to the housing 10, a hall element 30 coupled to the housing 10, and a latch 40 coupled between the housing 10 and the hall element 30. Wherein the housing 10 is for fluid communication and for carrying the magnetic rotor assembly 20, the hall element 30, and the latch 40. The magnetic rotor assembly 20 rotates with the circulation of the liquid within the housing 10 and generates a changing magnetic field. The hall element 30 is used to detect the changing magnetic field and convert it into a calculation of the liquid flow. The latch 40 is used to lock the hall element 30 to the housing 10.

Hereinafter, the water flow sensor 100 will be further described with reference to fig. 1 to 6.

As shown in fig. 1 to 3, in the present embodiment, the housing 10 is provided in a cylindrical structure. As shown in fig. 4, a flow passage 11 through which liquid flows is provided in the housing 10. Accordingly, in the present embodiment, the flow passage 11 is provided in the axial direction of the housing 10. In addition, as shown in fig. 1, in the present embodiment, an arrow-shaped mark 12 is provided on the outer side of the housing 10. The arrow-shaped marks 12 facilitate the user to quickly recognize the correct mounting direction of the housing 10, reducing the risk of the inlet and outlet of the flow channel 11 being reversed.

As shown in fig. 1 and 2, a clamping seat 13 is protruded from the outer side of the housing 10. As shown in fig. 6, the socket 13 has a slot 131, a first pin hole 132 and a second pin hole 133. As shown in fig. 4 and 5, the insertion groove 131 is parallel to the flow path 11. The first and second pin holes 132 and 133 vertically penetrate the socket 131 from the outside of the cartridge 13 and extend to the bottom of the cartridge 13. The first pin hole 132 is located at one side of the slot 131, and the second pin hole 133 is located at the opposite side of the slot 131. As shown in fig. 4, in the present embodiment, the first pin hole 132 and the second pin hole 133 penetrate from the outside of the card holder 13 to the bottom of the card holder 13, and the depth of the first pin hole 132 and the second pin hole 133 is larger than the thickness of the slot 131 (and accordingly, larger than the thickness of the hall element 30).

As shown in fig. 4, the magnetic rotor assembly 20 includes: an impeller rotor 21 accommodated in the flow path 11, and a magnet (not shown) attached to the impeller rotor 21.

As shown in fig. 4 and 6, in the present embodiment, the magnetic rotor assembly 20 further includes: a first bracket 22 and a second bracket 23 received in the flow path 11. The first bracket 22 and the second bracket 23 are detachably connected. The impeller rotor 21 is pivoted between the first bracket 22 and the second bracket 23. As shown in fig. 6, in the present embodiment, the first bracket 22 and the second bracket 23 accommodate the impeller rotor 21 in an accommodation space formed therebetween. The first bracket 22 and the second bracket 23 are used for forming a frame for mounting the impeller rotor 21, so that the magnetic rotor assembly 20 forms a modular component and penetrates into the runner 11 along the inlet of the runner 11, and the mounting difficulty is reduced.

In order to allow a user to precisely mount the magnetic rotor assembly 20 to a designated position of the flow passage 11, as shown in fig. 4, in the present embodiment, a stopper 14 is provided in the housing 10. The stopper 14 is located on the inner wall of the flow channel 11 to stop and limit the magnetic rotor assembly 20. The stopper 14 allows the magnetic rotor assembly 20 to accurately reach a predetermined mounting position, thereby improving the mounting accuracy. As shown in fig. 4, in the present embodiment, the limiting portion 14 is a convex ring structure disposed on the inner wall of the flow channel 11, and one end of the second support 23 away from the first support 22 abuts on the limiting portion 14.

As shown in fig. 1 to 5, the hall element 30 is inserted into the slot 131, and the hall element 30 is opened with a third pin hole 31 and a fourth pin hole 32. The third pin hole 31 is aligned with the first pin hole 132 (in the present embodiment, it is also understood that the third pin hole 31 is located at the middle section of the first pin hole 132). The fourth pin hole 32 is aligned with the second pin hole 133 (in the present embodiment, it can be understood that the fourth pin hole 32 is located at the middle section of the second pin hole 133).

As shown in fig. 4 and 6, in the present embodiment, the cross section of the hall element 30 in the direction of the line connecting the third pin hole 31 and the fourth pin hole 32 (in the present embodiment, it can also be understood as being along the radial direction of the housing 10) is T-shaped. The hall element 30 with the T-shaped cross section is more convenient for a user to quickly distinguish the installation posture of the hall element 30, plays a role of fool-proofing, and improves the assembly efficiency and precision. As shown in fig. 6, the third pin hole 31 and the fourth pin hole 32 are provided on the flanks of the hall element 30, respectively.

In order to facilitate the user to quickly mount the hall element 30 in place, as shown in fig. 2, in the present embodiment, the card socket 13 is provided with a stopper 134. The stopping portion 134 is located inside the slot 131 and is disposed away from the entrance of the slot 131. The stopping portion 134 can limit the insertion depth of the hall element 30 in the plug pin 40, so that the third pin hole 31 is accurately aligned with the first pin hole 132, and the fourth pin hole 32 is accurately aligned with the second pin hole 133, so that the hall element 30 can be easily installed in place, the installation difficulty is reduced, and the installation precision is improved.

In addition, in order to facilitate the user to quickly take out the hall element 30 from the slot 131 when detaching the hall element 30, as shown in fig. 2, in the embodiment, the socket 13 is further provided with a notch 135 communicating with the slot 131. Notch 135 is located on the inside of socket 131 and is positioned away from the entrance of socket 131. The hall element 30 extends out of the socket 13 through the notch 135. When the hall element 30 needs to be disassembled, after the bolt 40 is pulled out, a user can easily eject the hall element 30 out of the slot 131 by pushing the exposed part of the hall element 30 at the notch 135 reversely, so that the disassembling difficulty is reduced. For example, a user may hold a finger against the exposed portion of the hall element 30 at the notch 135 to push the hall element 30 out of the slot 131 in a reverse direction, so as to avoid tearing the hall element 30 out of the slot 131 by pulling the data line of the hall element 30.

As shown in fig. 1 to 6, the latch 40 is an inverted U-shaped elastic pin. One end of the plug pin 40 is inserted into the first pin hole 132 and the third pin hole 31. The other end of the plug pin 40 is inserted into the second pin hole 133 and the fourth pin hole 32.

Further, in some embodiments, the surfaces of both ends of the pin 40 may be provided with a relief. The ribs may increase friction between the two ends of the pin 40 and the first and second pin holes 132 and 133, thereby improving the installation stability of the pin 40.

The working principle is briefly described as follows: in assembly, the hall element 30 is inserted into the slot 131 of the socket 13, and the plug 40 is inserted into the first pin hole 132 and the second pin hole 133, in which one end of the plug 40 is inserted into the first pin hole 132 and the third pin hole 31, and the opposite end of the plug 40 is inserted into the second pin hole 133 and the fourth pin hole 32. The Hall element 30 is clamped with the clamping seat 13 through the bolt 40, so that the installation of the Hall element 30 becomes very simple. Meanwhile, the bolt 40 is an inverted U-shaped elastic pin, after the bolt 40 is installed, the two ends of the bolt 40 can rebound to extrude the inner side walls of the first pin hole 132 and the second pin hole 133, so that the bolt 40 is not easy to fall off, therefore, the installation stability of the hall element 30 is good, the reliability is high, and the hall element 30 cannot be scrapped when the bolt 40 is damaged, so that the maintenance cost is reduced. When the hall element 30 is disassembled, the plug 40 is drawn out by external force, and then the hall element 30 is taken out from the slot 131, so that the hall element 30 is very simple to disassemble.

According to the water flow sensor 100, the Hall element 30 is locked on the clamping seat 13 of the shell 10 by the elastic bolt 40, so that the requirements of strong reliability, simplicity in disassembly and assembly, low maintenance cost and the like are met.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (8)

1. A water flow sensor, comprising:

a housing; a flow passage for liquid to flow is arranged in the shell; the outer side of the shell is convexly provided with a clamping seat; the clamping seat is provided with a slot, a first pin hole and a second pin hole; the inserting groove is parallel to the flow passage; the first pin hole and the second pin hole vertically penetrate through the slot from the outer side of the clamping seat and extend to the bottom of the clamping seat; the first pin hole is positioned on one side of the slot, and the second pin hole is positioned on the other opposite side of the slot;

a magnetic rotor assembly coupled to the housing; the magnetic rotor assembly includes: an impeller rotor accommodated in the flow passage and a magnet mounted on the impeller rotor;

a Hall element connected with the shell; the Hall element is inserted into the slot and provided with a third pin hole and a fourth pin hole; the third pin hole and the first pin hole are on the same straight line; the fourth pin hole and the second pin hole are on the same straight line; and

a plug connected between the housing and the Hall element; the bolt is an inverted U-shaped elastic pin; one end of the bolt penetrates through the first pin hole and the third pin hole; the other end of the bolt penetrates through the second pin hole and the fourth pin hole.

2. The water flow sensor according to claim 1, wherein the cartridge is provided with a stop; the stopping part is positioned at the inner side of the slot and is arranged away from the inlet of the slot.

3. The water flow sensor according to claim 1, wherein the cartridge is further provided with a notch communicating with the slot; the notch is positioned at the inner side of the slot and is arranged away from the inlet of the slot; the Hall element extends out of the card seat through the notch.

4. The water flow sensor according to claim 1, wherein the surfaces of the two ends of the pin are provided with raised lines.

5. The water flow sensor according to claim 1, wherein the hall element has a T-shaped cross section along a direction of a line connecting the third pin hole and the fourth pin hole.

6. The water flow sensor according to claim 1, wherein the magnetic rotor assembly further comprises: a first bracket and a second bracket received in the flow passage; the first bracket and the second bracket are detachably connected; the impeller rotor is pivoted between the first support and the second support.

7. The water flow sensor according to claim 6, wherein a stop is provided in the housing; the limiting part is positioned on the inner wall of the flow channel to limit the magnetic rotor assembly in a stopping way.

8. Water flow sensor according to any of claims 1 to 7, characterised in that the outside of the housing is provided with an arrow-like indication.

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