Small-flow vortex street water flow sensor and water flow sensor valve body thereof

Abstract

The utility model discloses a small flow vortex street water flow sensor and a water flow sensor valve body thereof, comprising a valve body housing, the outer side of the valve body housing is provided with a circuit board installation part with a circuit board installation groove, and the circuit board installation groove is internally provided with a probe installation hole communicated with an internal channel of the valve body housing; the bluff body is located in the internal channel of the valve body shell and located under the circuit board mounting groove; and a designed distance is formed between the bluff body and the central axis of the probe mounting hole. By means of the structural arrangement, it is guaranteed that the flow blocking effect of the flow blocking body is not affected, meanwhile, the problem that components at the flow blocking installation holes are prone to corrosion or damage due to long-time soaking, water seeps into the circuit board assembly, and the whole equipment is affected is solved, and the sealing performance of the whole device is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of flow detection equipment, and in particular to a small-flow vortex water flow sensor and a water flow sensor valve body thereof. Background Art

[0002] A water flow sensor is a water flow sensor that outputs pulse signals or current, voltage and other signals by sensing the water flow. The output of this signal is in a certain linear proportion to the water flow, and has corresponding conversion formulas and comparison curves. Therefore, it can be used for water control management and flow calculation. In terms of heat, it can be used in conjunction with a transducer to measure the loss of medium energy over a period of time, such as a heat meter.

[0003] At present, the most common water flow sensors on the market are vortex or turbine water flow sensors, which use water flow to push the impeller or magnetic rotor inside the sensor, and output a square wave pulse signal through the Hall sensor element. The pulse is proportional to the water flow. However, this type of water flow sensor has some disadvantages: water from different regions contains different impurities, which are adsorbed on the magnetic rotor or impeller, making the sensor ineffective; there is a rotor inside the water flow sensor, and too fast a speed will accelerate wear, resulting in a short life and high noise.

[0004] In the prior art, Chinese utility model patent CN219301695U discloses a water flow sensor, which includes a valve body, a probe hole and a flow blocking hole are provided on the wall of the valve body, the probe assembly and the flow blocking device are respectively extended into the corresponding holes, and a detection signal is output according to the water pressure difference to detect the amount of water passing through the water flow sensor. The components at the flow blocking hole connected to the flow blocking device are easily corroded or damaged under long-term immersion, resulting in water seepage into the circuit board assembly, affecting the device, and the sealing effect needs to be strengthened. Utility Model Content

[0005] The embodiment of the present application provides a small-flow vortex water flow sensor to solve the problem in the related art that the connection between the flow blocking device and the circuit board assembly is easily corroded or damaged after long-term immersion, and then water seepage affects the equipment, and the sealing performance needs to be strengthened.

[0006] In a first aspect, a small-flow vortex water flow sensor and a water flow sensor valve body thereof are provided, which include a valve body shell, a circuit board mounting portion having a circuit board mounting groove is provided on the outer side of the valve body shell, a probe mounting hole connected to an internal channel of the valve body shell is provided in the circuit board mounting groove; a bluff body is located in the internal channel of the valve body shell and directly below the circuit board mounting groove; a designed distance is provided between the bluff body and the central axis of the probe mounting hole.

[0007] In some embodiments, the bluff body is a regular triangular prism, one side of the regular triangular prism is perpendicular to the direction of water flow, and the width of this side is L3, L3 < 10 mm; or, the bluff body is a columnar structure, one side of which is perpendicular to the direction of water flow, and the width of this side is L3, L3 < 10 mm; the cross-sectional width of the column decreases along the direction of water flow.

[0008] In some embodiments, the internal channel of the valve body shell is provided with a flow blocking portion, and the bluff body is connected to the flow blocking portion; or, the valve body shell includes the bluff body, and the bluff body is provided in the internal channel of the valve body shell.

[0009] In some embodiments, the axial direction of the bluff body and the direction in which the probe mounting hole extends are parallel to each other.

[0010] In some embodiments, the distance from the bluff body to the water inlet of the valve body shell is L1, and L1>30mm.

[0011] In some embodiments, the distance from the bluff body to the center of the position of the probe extending into the probe mounting hole is L2, and L2 is less than 30 mm.

[0012] In some embodiments, screw fixing portions are provided on both sides of the circuit board mounting portion; a plurality of raised positioning protrusions are provided on the circuit board mounting groove; and threaded portions connected to water pipes are provided on both side ports of the valve body housing.

[0013] In a second aspect, a small-flow vortex water flow sensor is provided, which includes the above-mentioned water flow sensor valve body; a circuit board assembly, which is arranged on the circuit board mounting portion; ear plates are provided on both sides of the circuit board assembly, and screw holes passing through the ear plates are provided on the ear plates; and screws are also included, and the screws pass through the screw holes and are inserted into the screw fixing portion to fix the circuit board assembly to the valve body housing.

[0014] In some embodiments, a plurality of positioning grooves are correspondingly provided on an end surface of the circuit board assembly close to the circuit board mounting portion; the positioning grooves are correspondingly engaged with the positioning protrusions.

[0015] In some embodiments, a data connection socket is provided on an end surface of the circuit board assembly away from the circuit board mounting portion.

[0016] The beneficial effects of the technical solution provided by this application include:

[0017] The embodiment of the present application provides a small flow vortex water flow sensor. On the one hand, the valve body housing is provided with a circuit board mounting portion so as to be matched and installed with the circuit board assembly; and the circuit board mounting portion is provided with a circuit board mounting groove, and only a probe mounting hole is provided in the circuit board mounting groove, and the flow blocking mounting hole in the original structure is removed, thereby eliminating the influence that the parts at the position of the flow blocking mounting hole are easily corroded or damaged due to being immersed in the fluid for a long time, resulting in water seeping into the circuit board assembly from this part;

[0018] On the other hand, the choke body is integrated with the valve body shell. This structural setting ensures that while it does not affect the choke effect, it will not cause water seepage problems when connected to the choke installation hole, thereby enhancing the sealing of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A cross-sectional view of a vortex water flow sensor valve body provided in an embodiment of the present application;

[0021] Figure 2 A side view of a vortex water flow sensor valve body provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the split structure of a small flow vortex water flow sensor provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of a circuit board assembly provided in an embodiment of the present application.

[0024] In the figure: 1. valve body shell; 101. water inlet; 2. circuit board mounting part; 3. bluff body; 4. screw fixing part; 5. threaded part; 6. probe mounting hole; 7. circuit board mounting groove; 8. positioning protrusion; 9. circuit board assembly; 901. ear plate; 902. data connection socket; 903. screw hole; 904. positioning groove; 10. screw. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] The embodiment of the present application provides a small-flow vortex water flow sensor, which can solve the problem in the related art that the connection between the flow blocking device and the circuit board assembly is easily corroded or damaged under long-term immersion, and then water seepage affects the equipment, and the sealing needs to be strengthened.

[0027] Please refer to Figure 1-4 A small flow vortex water flow sensor comprises a valve body shell 1, on the outer side of which is provided a circuit board mounting portion 2 having a circuit board mounting groove 7, in which the circuit board mounting groove 7 is provided a probe mounting hole 6 which is connected to the internal channel of the valve body shell 1; a bluff body 3, which is located in the internal channel of the valve body shell 1 and directly below the circuit board mounting groove 7; there is a designed distance between the bluff body 3 and the central axis of the probe mounting hole 6.

[0028] This design takes into account the problems that may arise during long-term use. By removing the flow-blocking installation hole and integrating the bluff body 3 with the valve body housing 1, the sealing and stability of the device are effectively improved. Such a design can not only avoid the problem of damage caused by the components being immersed in the fluid for a long time, but also ensure that the water flow sensor can accurately measure the fluid flow and maintain good performance when working. It ensures that while not affecting the flow-blocking effect of the bluff body 3, the components at the flow-blocking installation hole will not be easily corroded or damaged due to long-term immersion, causing water to seep into the circuit board assembly 9, affecting the entire device, and strengthening the sealing of the entire device.

[0029] It should be noted that the principle of the device for measuring water flow rate is as follows: a probe assembly is arranged in the probe mounting hole 6, and the bluff body 3 is arranged at a position L1 away from the water inlet 101 of the valve body housing 1 (L1>30mm). The highlight of the device is that the bluff body 3 is arranged at a position L2 away from the probe extending into the probe mounting hole 6 (L2<30mm); the fluid flows in at a distance L1 from the bluff body 3, and regular vortices are alternately generated on both sides of the bluff body 3 when flowing through the bluff body 3, and the vortices are asymmetrically arranged downstream of the bluff body 3. The component arranged in the probe mounting hole outputs a signal to the circuit board component 9 according to the frequency, flow velocity and bluff body width L3 of the vortex formation, and the fluid flow rate is obtained according to the obtained curve and formula.

[0030] In some preferred embodiments, the bluff body 3 is a regular triangular prism, one side of the regular triangular prism is perpendicular to the flow direction of the water flow, and the width of this side is L3, L3 < 10mm. This design can more effectively guide the water flow, making the water flow more concentrated and producing a stronger vortex effect, thereby improving the response speed and measurement accuracy of the sensor. By optimizing the design of the bluff body 3, it is possible to better adapt to the fluid characteristics in different application scenarios, ensuring that the water flow sensor can stably and accurately monitor the flow under various conditions.

[0031] In some preferred embodiments, the bluff body 3 is a columnar structure, one side of which is perpendicular to the water flow direction, and the width of this side is L3, L3 < 10mm; the cross-sectional width of the column decreases along the water flow direction. It should be noted that the bluff body 3 can be set to a variety of reasonable structures. The bluff body 3 adopts a columnar structure, and the cross-sectional width gradually decreases along the water flow direction, which can help reduce the resistance of the water flow and increase the flow velocity of the fluid around the bluff body 3, thereby facilitating the accurate measurement of the fluid flow.

[0032] In some preferred embodiments, the axial direction of the bluff body 3 is parallel to the direction in which the probe mounting hole 6 extends. This design allows the bluff body 3 to better guide the fluid to pass through, while maintaining a tight connection between the bluff body 3 and the probe assembly. Through this parallel design, the resistance of the fluid after flowing through the bluff body 3 can be reduced, vibration and disturbance can be reduced, and the stability and accuracy of the sensor can be ensured.

[0033] In some preferred embodiments, the distance between the bluff body 3 and the water inlet 101 of the valve body housing 1 is L1, and L1>30mm. When the fluid flows into the bluff body 3 at a distance L1, regular vortices are generated alternately on both sides of the bluff body 3 when flowing through the bluff body 3. The vortices are arranged asymmetrically downstream of the bluff body 3, so that the probe assembly can measure the fluid flow rate.

[0034] In some preferred embodiments, the center distance between the bluff body 3 and the probe extending into the probe mounting hole 6 is L2, and L2 is less than 30 mm. This design can ensure that the distance between the bluff body 3 and the probe is kept within a suitable range, which helps to reduce the resistance and disturbance when the fluid flows through the bluff body 3, thereby improving the stability and accuracy of the sensor during flow measurement. By controlling the value of L2, the bluff body 3 is kept tightly connected with the probe assembly, and it is suitable for working environments under different flow rate conditions.

[0035] In some preferred embodiments, screw fixing parts 4 are provided on both sides of the circuit board mounting part 2; a plurality of raised positioning protrusions 8 are provided on the circuit board mounting groove 7; and threaded parts 5 connected to the water pipe are provided on both side ports of the valve body shell 1. By providing the screw fixing parts 4, it is convenient to firmly install the circuit board assembly 9 on the valve body shell 1, thereby increasing the stability of the overall mechanism. At the same time, the raised positioning protrusions 8 provided on the circuit board mounting groove 7 play a positioning role, ensuring the accuracy and stability of the installation of the circuit board assembly 9, and also help to simplify the installation process and improve production efficiency; in addition, threaded parts 5 connected to the water pipe are provided on both side ports of the valve body shell 1. This design can facilitate the connection of the valve body with the water pipe, ensure the tightness and sealing of the connection, and efficiently and seamlessly connect with existing products.

[0036] In some preferred embodiments, the circuit board assembly 9 is arranged on the circuit board mounting portion 2; ear plates 901 are arranged on both sides of the circuit board assembly 9, and screw holes 903 penetrating the ear plates 901 are arranged on the ear plates 901; and screws 10 are also included, and the screws 10 penetrate the screw holes 903 and are inserted into the screw fixing portion 4 to fix the circuit board assembly 9 with the valve body housing 1. Such a design can ensure that the connection between the circuit board assembly 9 and the valve body housing 1 is firm and reliable, avoid loosening or falling off, and ensure the normal operation of the equipment. At the same time, the fixed connection through the screws 10 is also convenient for subsequent maintenance and replacement work, thereby improving the maintainability and reliability of the equipment.

[0037] In some preferred embodiments, a plurality of positioning grooves 904 are correspondingly provided on the end surface of the circuit board assembly 9 close to the circuit board mounting portion 2; the positioning grooves 904 are correspondingly engaged with the positioning protrusions 8. When the positioning grooves 904 of the circuit board assembly 9 are engaged with the positioning protrusions 8, the position of the circuit board assembly 9 relative to the circuit board mounting portion 2 can be ensured to be accurate, thereby avoiding problems caused by installation errors, thereby improving the overall installation efficiency and accuracy.

[0038] In some preferred embodiments, a data connection socket 902 is provided on the end surface of the circuit board assembly 9 away from the circuit board mounting portion 2. Such a design can facilitate data connection between the circuit board assembly 9 and other devices or components to achieve information transmission or data exchange. The provision of the data connection socket 902 can make the circuit board assembly 9 more flexible and diverse to adapt to different systems or devices, thereby improving its applicability and versatility.

[0039] Beneficial effects of the utility model:

[0040] On the one hand, the valve body shell 1 is provided with a circuit board mounting portion 2 so as to be matched and installed with the circuit board assembly 9; and the circuit board mounting portion 2 is provided with a circuit board mounting groove 7, in which only a probe mounting hole 6 is provided, and the flow-blocking mounting hole in the original structure is removed, thereby eliminating the influence that the components at the position of the flow-blocking mounting hole are easily corroded or damaged due to being immersed in the fluid for a long time, causing water to seep into the circuit board assembly 9 from this part; on the other hand, the choke body 3 is arranged as a whole with the valve body shell 1. This structural arrangement ensures that while it does not affect its flow-blocking effect, it will not cause the problem of water seepage caused by the connection with the flow-blocking mounting hole, thereby enhancing the sealing of the entire device.

[0041] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0042] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0043] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A water flow sensor valve body, characterized in that: It includes: A valve body shell (1) having a circuit board mounting portion (2) with a circuit board mounting groove (7) disposed on its outer side, wherein a probe mounting hole (6) communicating with an internal channel of the valve body shell (1) is disposed in the circuit board mounting groove (7); A bluff body (3) is located in the internal channel of the valve body shell (1) and is located directly below the circuit board mounting groove (7); a designed distance is provided between the bluff body (3) and the central axis of the probe mounting hole (6).

2. The water flow sensor valve body according to claim 1, characterized in that: The bluff body (3) is a regular triangular prism, one side of which is perpendicular to the flow direction of the water flow, and the width of the side is L3, L3 < 10 mm; or, The bluff body (3) is a columnar structure, one side of which is perpendicular to the flow direction of the water flow, and the width of this side is L3, L3 < 10 mm; the cross-sectional width of the column decreases along the direction of the water flow.

3. The water flow sensor valve body according to claim 1, characterized in that: The internal passage of the valve body shell (1) is provided with a flow blocking portion, and the flow blocking body (3) is connected to the flow blocking portion; or, The valve body shell (1) comprises the bluff body (3), and the bluff body is arranged in the internal channel of the valve body shell (1).

4. The water flow sensor valve body according to claim 1, characterized in that: The axial direction of the bluff body (3) and the direction in which the probe mounting hole (6) extends are parallel to each other.

5. The water flow sensor valve body according to claim 1, characterized in that: The distance between the bluff body (3) and the water inlet (101) of the valve body shell (1) is L1, and L1>30 mm.

6. The water flow sensor valve body according to claim 1, characterized in that: The center distance between the bluff body (3) and the probe extending into the probe mounting hole (6) is L2, and L2 is less than 30 mm.

7. The water flow sensor valve body according to claim 1, characterized in that: The two side ports of the valve body shell (1) are provided with threaded portions (5) connected to the water pipe; Screw fixing parts (4) are provided on both sides of the circuit board mounting part (2); The circuit board installation groove (7) is provided with a plurality of raised positioning protrusions (8).

8. A small flow vortex flow sensor, characterized in that: It comprises: a water flow sensor valve body as described in any one of claims 1 to 7; A circuit board assembly (9), which is arranged on the circuit board mounting portion (2); Screw fixing parts (4) are provided on both sides of the circuit board mounting part (2); The circuit board installation groove (7) is provided with a plurality of raised positioning protrusions (8); Ear plates (901) are provided on both sides of the circuit board assembly (9), and screw holes (903) penetrating the ear plates (901) are provided on the ear plates (901); It also includes a screw (10), wherein the screw (10) passes through the screw hole (903) and is inserted into the screw fixing portion (4) to fix the circuit board assembly (9) to the valve body housing (1).

9. The small flow vortex water flow sensor according to claim 8, characterized in that: A plurality of positioning grooves (904) are correspondingly provided on an end surface of the circuit board assembly (9) close to the circuit board mounting portion (2); The positioning groove (904) is correspondingly engaged and connected with the positioning protrusion (8).

10. The small flow vortex water flow sensor according to claim 8, characterized in that: A data connection socket (902) is provided on the end surface of the circuit board assembly (9) at one end away from the circuit board mounting portion (2).

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