Flow meter with cavity structure

Abstract

The utility model provides a flow meter with a cavity structure, which comprises a body and a top cover, the body and the top cover are locked and fixed through screws, and the flow meter further comprises a flow meter body and a flow meter body, the cavity is arranged in the shell and is used for assembling the circuit board and the interior of the shell; the infrared geminate transistor assembly is arranged on the circuit board and is located in the cavity together with the circuit board; the shaft body is arranged at the top of the shell and is movably connected with the shell; the impeller is arranged below the top cover and is coaxially fixed with the shaft body; wherein the impeller is provided with a plurality of wheel bodies which are distributed at equal intervals, a counting space is jointly formed between the plurality of adjacent wheel bodies, and when the impeller rotates on the shaft body, the counting space is intermittently corresponding to the infrared paired tube assembly. Through the arrangement of the sealing rubber ring and the sealing groove, the joint of the spliced shell and the top cover can be sealed and blocked, so that the situation of leakage cannot occur when flowing water flows back in the water inlet pipe and the water outlet pipe.

Description

Technical Field

[0001] The utility model relates to the field of flow meters, in particular to a flow meter with a cavity structure. Background Art

[0002] Flowmeter is defined as an instrument that indicates the measured flow rate and / or the total amount of fluid in a selected time interval. In simple terms, it is an instrument used to measure the flow rate of fluid in a pipeline or open channel. Flowmeters are divided into differential pressure flowmeters, rotor flowmeters, throttling flowmeters, slit flowmeters, volumetric flowmeters, electromagnetic flowmeters, ultrasonic flowmeters, etc. Classified by medium: liquid flowmeters and gas flowmeters.

[0003] Most of the existing flow meters are assembled from split shells, so water seepage is easy to occur at the assembly point during actual use. When water seepage occurs, due to the high pressure inside the flow meter, it will appear in a jet-like shape, causing the surrounding objects to be immersed in water and easily damaged. Therefore, it is necessary to propose a flow meter that can effectively prevent water seepage. To this end, we have made improvements and proposed a flow meter with a cavity structure. Utility Model Content

[0004] The utility model aims to provide a flow meter with a cavity structure, which solves the problem that the existing flow meter with a cavity structure is easy to seep water during use and affects the use of surrounding electrical equipment.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] A flow meter with a cavity structure, comprising a body shell and a top cover, wherein the body shell and the top cover are locked and fixed by screws, and further comprising:

[0007] The cavity is arranged inside the housing and used for assembling the circuit board and the inside thereof;

[0008] Infrared pair tube assembly, which is arranged on the circuit board and is located inside the cavity;

[0009] A shaft body, which is arranged on the top of the shell and movably connected thereto;

[0010] An impeller is disposed below the top cover and fixed coaxially with the shaft body;

[0011] The impeller has a plurality of equally spaced wheel bodies, a counting space is formed between the adjacent wheel bodies, and when the impeller rotates on the shaft, the counting space corresponds to the infrared tube assembly intermittently.

[0012] As a preferred technical solution of the present application, the infrared pair tube assembly includes an infrared receiving tube and an infrared transmitting tube, and the infrared receiving tube and the infrared transmitting tube are respectively arranged on both sides of the impeller and electrically connected to the circuit board.

[0013] As a preferred technical solution of the present application, a sealing groove is provided in an annular manner at a position of the casing close to the impeller, and a sealing rubber ring is embedded in the sealing groove.

[0014] As a preferred technical solution of the present application, the surface of the top cover is respectively provided with a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe are both connected to the activity space corresponding to the impeller.

[0015] As a preferred technical solution of the present application, an overflow groove is also provided at the top of the shell on the outside of the sealing groove, and a pressure relief pipe is fixed to one side of the shell.

[0016] As a preferred technical solution of the present application, the pressure relief pipe has a pressure relief channel therein and is connected to the overflow groove.

[0017] As a preferred technical solution of the present application, a sealant is also provided at the bottom of the housing for sealing and fixing the circuit board in the cavity.

[0018] As a preferred technical solution of the present application, a chamfered arc surface is formed at the edge of the overflow groove toward the overflow groove.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] In the scheme of this application:

[0021] By providing a sealing rubber ring and a sealing groove, the joint between the assembled body and the top cover can be sealed and blocked, so that no leakage will occur when the water flows back through the water inlet pipe and the water outlet pipe. At the same time, if water leaks out of the sealing rubber ring and the sealing groove due to unexpected circumstances, the overflow groove can be used to drain the leaked water so that it is gathered in the pressure relief pipe and transported to a designated position. This not only collects the leaked water to prevent overflow, but also achieves a better drainage and pressure relief effect through the chamfered arc surface, which is beneficial to the protection of the surrounding structure of the flow meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a flow meter with a cavity structure provided in this application;

[0023] Figure 2 A schematic diagram of the disassembled structure of the flow meter with a cavity structure provided in this application;

[0024] Figure 3 A schematic diagram of the housing structure of the flow meter with a cavity structure provided in this application;

[0025] Figure 4 The flow meter of the cavity structure provided in this application Figure 3 The enlarged structural diagram at A in the middle;

[0026] Figure 5 A schematic cross-sectional view of a flow meter with a cavity structure provided in the present application;

[0027] Figure 6 This is a schematic structural diagram of Example 2 of a flow meter with a cavity structure provided in the present application.

[0028] Indicated in the figure:

[0029] 1. Shell; 2. Top cover; 3. Screws;

[0030] 11. Cavity; 12. Infrared tube assembly; 13. Sealing groove; 14. Sealing rubber ring; 15. Overflow groove; 16. Pressure relief pipe; 17. Sealant; 18. Circuit board; 19. Chamfered arc surface;

[0031] 120, infrared receiving tube; 121, infrared transmitting tube;

[0032] 21. Shaft; 22. Impeller; 23. Wheel body; 24. Counting space; 25. Water inlet pipe; 26. Water outlet pipe; 27. Activity space. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0034] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply 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 utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] Example 1

[0039] like Figure 1-Figure 5 As shown, this embodiment proposes a flow meter with a cavity structure, including a body 1 and a top cover 2, the body 1 and the top cover 2 are locked and fixed by screws 3, and also includes: a cavity 11, which is arranged inside the body 1 for assembling the circuit board 18 and the inside; an infrared tube assembly 12, which is arranged on the circuit board 18 and is located inside the cavity 11; a shaft 21, which is arranged on the top of the body 1 and is movably connected to it; an impeller 22, which is arranged below the top cover 2 and is coaxially fixed with the shaft 21; wherein the impeller 22 has a plurality of equally spaced wheel bodies 23, a counting space 24 is formed between the plurality of adjacent wheel bodies 23, and when the impeller 22 rotates on the shaft 21, the counting space 24 is intermittently corresponding to the infrared tube assembly 12;

[0040] The infrared pair tube assembly 12 includes an infrared receiving tube 120 and an infrared emitting tube 121. The infrared receiving tube 120 and the infrared emitting tube 121 are respectively arranged on both sides of the impeller 22 and are electrically connected to the circuit board 18. The bottom of the housing 1 is also provided with a sealant 17 for sealing and fixing the circuit board 18 in the cavity 11.

[0041] A sealing groove 13 is provided in an annular manner at a position of the casing 1 near the impeller 22, and a sealing rubber ring 14 is embedded in the sealing groove 13. After the top cover 2 and the casing 1 are assembled, the sealing rubber ring 14 can be provided to seal the gap at the assembly point, thereby effectively achieving the water barrier in the impeller 22;

[0042] The surface of the top cover 2 is provided with a water inlet pipe 25 and a water outlet pipe 26, and both the water inlet pipe 25 and the water outlet pipe 26 are connected to the activity space 27 of the corresponding impeller 22;

[0043] In actual use, water enters the top cover 2 through the water inlet pipe 25 and is input into the activity space 27 on the body 1, and is discharged through the water outlet pipe 26. At this time, the impeller 22 in the activity space 27 rotates driven by the water flow. When it rotates to the wheel body 23 of the impeller 22, it will block the infrared tube assembly 12. When it rotates to the counting space 24 between the two blades, it will not block the infrared tube assembly 12. In this process, the infrared tube assembly 12 is continuously connected and disconnected, and finally outputs different frequencies. Different frequencies correspond to different flow rates, and the current flow value is obtained according to the corresponding relationship.

[0044] Example 2

[0045] like Figure 1-Figure 6 As shown, based on the embodiment 1, the structure of the housing 1 is further optimized in this embodiment. An overflow groove 15 is further provided on the top of the housing 1 outside the sealing groove 13. A pressure relief pipe 16 is fixed on one side of the housing 1. The pressure relief pipe 16 has a pressure relief channel therein and is connected to the overflow groove 15.

[0046] The pressure relief pipe 16 is connected to the external drainage pipeline to transport the leaked water back to the storage;

[0047] As described in Example 1, when the sealing groove 13 and the sealing rubber ring 14 lose the sealing effect on the connection between the body 1 and the top cover 2 due to an accident, water will penetrate the sealing rubber ring 14 and flow outward. The water in the flow process may cause spraying and affect the use of surrounding structures, and cause waste of water resources. In this embodiment, by providing an overflow groove 15, the outflowing water can be drained and collected, and the water is uniformly transported to the pressure relief pipe 16 and then transported to the outside, thereby reducing the situation where leaked water seeps into the outside of the flow meter, which can not only realize the recycling of water resources, but also realize the protection of the structure in the surrounding environment.

[0048] A chamfered arc surface 19 is formed at the edge of the overflow groove 15 toward the overflow groove 15 . Through the arrangement of the chamfered arc surface 19 , water that penetrates the outside through the sealing groove 13 can better enter the overflow groove 15 to wait for drainage and collection.

[0049] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A flow meter with a cavity structure, characterized in that: It comprises a body (1) and a top cover (2), wherein the body (1) and the top cover (2) are locked and fixed by screws (3), and further comprises: A cavity (11) is arranged inside the housing (1) and is used for assembling a circuit board (18) therein; An infrared tube assembly (12) is arranged on a circuit board (18) and is located inside the cavity (11); A shaft (21) is disposed on the top of the housing (1) and is movably connected thereto; An impeller (22) is disposed below the top cover (2) and is coaxially fixed with the shaft (21); The impeller (22) has a plurality of equally spaced wheel bodies (23), a counting space (24) is formed between the plurality of adjacent wheel bodies (23), and when the impeller (22) rotates on the shaft (21), the counting space (24) and the infrared tube assembly (12) are intermittently corresponding.

2. A flow meter with a cavity structure according to claim 1, characterized in that: The infrared pair tube assembly (12) comprises an infrared receiving tube (120) and an infrared emitting tube (121), wherein the infrared receiving tube (120) and the infrared emitting tube (121) are respectively arranged on both sides of the impeller (22) and are electrically connected to the circuit board (18).

3. The flow meter with a cavity structure according to claim 1, characterized in that: A sealing groove (13) is provided in an annular shape on the housing (1) at a position close to the impeller (22), and a sealing rubber ring (14) is embedded in the sealing groove (13).

4. The flow meter with a cavity structure according to claim 1, characterized in that: The surface of the top cover (2) is provided with a water inlet pipe (25) and a water outlet pipe (26), respectively, and the water inlet pipe (25) and the water outlet pipe (26) are both connected to the activity space (27) corresponding to the impeller (22).

5. The flow meter with a cavity structure according to claim 1, characterized in that: An overflow groove (15) is also provided on the top of the housing (1) outside the sealing groove (13), and a pressure relief pipe (16) is fixed on one side of the housing (1).

6. The flow meter with a cavity structure according to claim 5, characterized in that: The pressure relief pipe (16) has a pressure relief channel therein and is in communication with the overflow groove (15).

7. The flow meter with a cavity structure according to claim 1, characterized in that: The bottom of the housing (1) is also provided with a sealant (17) for sealing and fixing the circuit board (18) in the cavity (11).

8. A flow meter with a cavity structure according to claim 5 or 6, characterized in that: A chamfered arc surface (19) is formed at the edge of the overflow groove (15) towards the overflow groove (15).

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