A float type water flow switch device

Abstract

The utility model relates to water shortage protection technical field provides a kind of float ball type water flow switch device, comprising: shell, its bottom has water inlet, its top has connecting port, the lateral surface of its middle part has water outlet;Measuring seat, its lower end is connected with connecting port, and measuring seat upper end is equipped with the mounting hole of bottom closure;Inductive proximity switch, it is installed in the inside of mounting hole;And the float ball that can be detected by inductive proximity switch, the bottom of measuring seat is fixedly connected with the limit structure for limiting the transverse movement of float ball.The water in the shell interior of the utility model does not contact with inductive proximity switch, realizes non-contact measurement, compared with baffle type flow switch, overcome the inaction or malfunction caused by water quality working condition poor and other reasons;Compared with thermal type flow switch, avoid the detection failure caused by water pollution sensor.

Description

Technical Field

[0001] This utility model relates to the field of water shortage protection technology, and more specifically, to a float-type water flow switch device. Background Technology

[0002] Wet grinding is one of the main processes in the preparation of cemented carbide mixtures, and the main equipment used is a ball mill. Hexane is added to the ball mill barrel, and water (jacketed) is used for cooling. To conserve water resources, the ball mill's cooling water is supplied by a circulating water system. The inlet water is connected to the circulating water system's supply pipe, and the outlet water flows by gravity into the return water pipe and back to the circulating water pool. Large-scale production lines have a large number of ball mills (e.g., a large-scale production line with 76 ball mills), which is classified as a Class IIB flammable and explosive environment. If the equipment's cooling water leaks or is interrupted, the ball mill's operating temperature will become too high, posing a risk of hexane ignition, combustion, or even explosion. Therefore, water flow monitoring is crucial and must be performed on the return water pipe. The circulating water system is an open cooling water system, with both the cooling tower and the recovery water tank being open. Currently, baffle-type flow switches and thermal flow switches are commonly used. However, due to impurities such as mud, silt, rust, and dirt in the water, baffle-type flow switches are prone to failure to reset or malfunction due to impurities entangled or stuck on the baffle. Thermal flow switches are prone to sensor failure due to impurities contaminating the sensor. Utility Model Content

[0003] The purpose of this invention is to provide a float-type water flow switch device to solve the above-mentioned defects of existing flow switch devices.

[0004] This utility model is achieved through the following technical solution:

[0005] A float-type water flow switch device, comprising:

[0006] The shell has a water inlet at the bottom, a connection port at the top, and a water outlet on the middle side.

[0007] The measuring base has a lower end that connects to the connector, and a bottom-closed mounting hole at the upper end.

[0008] An inductive proximity switch is installed inside a mounting hole;

[0009] And a float that can be detected by an inductive proximity switch, with a limiting structure fixedly connected to the bottom of the measuring base to restrict the lateral movement of the float.

[0010] Optionally, the limiting structure includes a support plate and at least three stop bars. The upper ends of the stop bars are fixedly connected to the measuring seat, and the stop bars are evenly spaced along the circumference of the measuring seat. The float is restricted between the stop bars, and the support plate is fixedly connected to the bottom of the stop bars to support the float.

[0011] Optionally, the lower end of the measuring base is connected to the connection port by a thread.

[0012] Optionally, the inductive proximity switch is connected to the mounting hole via a thread.

[0013] Optionally, the housing includes a reducing tee and a reducing elbow, with the reducing elbow connected to the bottom interface of the reducing tee.

[0014] Optionally, the housing further includes an extension tube connected between the reducing tee and the reducing elbow.

[0015] Optionally, the distance between the upper edge of the water outlet and the bottom of the measuring seat is 4.5mm-5.5mm.

[0016] Optionally, the measuring seat is made of polytetrafluoroethylene.

[0017] Optionally, the float is made of stainless steel.

[0018] Optionally, the stop bar is made of polyvinyl chloride.

[0019] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, an inductive proximity switch is used to detect the float. In practical applications, the outlet of the return water pipe of the ball mill cooling water circulation system is connected to the inlet on the shell. When there is no water in the return water pipe or the water volume is low, the float does not float or floats only a small distance, and the float is outside the detection range of the inductive proximity switch. At this time, the ball mill control system disconnects the power circuit, and the ball mill stops. When the water volume increases, the float floats into the detection range of the inductive proximity switch and is detected. The ball mill control system then connects the power circuit, and the ball mill operates normally. Because the bottom of the mounting hole for the inductive proximity switch on the measuring base is closed, the water inside the shell does not contact the inductive proximity switch, achieving non-contact measurement. Compared with the baffle-type flow switch, this overcomes the inability to operate or malfunction caused by poor water quality conditions. Compared with the thermal flow switch, this avoids detection failure caused by water contamination of the sensor. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of a float-type water flow switch device provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the installation structure of the flow meter, limiting structure, and float.

[0022] Figure 3 This is a schematic diagram of the shell structure;

[0023] Attached reference numerals: 1-Inductive proximity switch, 2-Measuring base, 3-Housing, 301-Reducing tee, 3011-Outlet, 3012-Connection port, 302-Reducing elbow, 3021-Inlet, 4-Float, 5-Stop bar, 6-Support plate. Detailed Implementation

[0024] refer to Figure 1 and Figure 2 A float-type water flow switch device includes a housing 3, a measuring base 2, an inductive proximity switch 1, and a float 4.

[0025] The bottom of the housing 3 has a water inlet 3021, the top of the housing 3 has a connection port 3012, and the middle side of the housing 3 has a water outlet 3011. The lower end of the measuring base 2 is connected to the connection port 3012, and the upper end of the measuring base 2 is provided with a bottom-closed mounting hole. The inductive proximity switch 1 is installed inside the mounting hole (it is easy to understand that in order to avoid affecting the normal operation of the inductive proximity switch 1, the thickness from the bottom of the mounting hole to the bottom of the measuring base 2 cannot be too large. In actual applications, for example, this thickness is 2mm). The bottom of the measuring base 2 is fixedly connected to a limiting structure for restricting the lateral movement of the float 4, that is, the float 4 can only move up and down under the limiting structure.

[0026] In practical applications, the inlet 3021 on the shell 3 is connected to the outlet of the return water pipe of the ball mill cooling water circulation system. That is, the return water of the ball mill cooling water circulation system returns to the circulation pool through the outlet 3011 on the shell 3 after passing through the shell 3. Depending on the actual distance on site, a drain pipe can also be connected to the outlet 3011 on the shell 3. It should be understood that the outlet 3011 on the shell 3 should not be lower than the outlet end of the drain pipe to ensure that the water in the outlet 3011 flows out freely after the water is stopped and drops to the lower edge of the outlet 3011.

[0027] When there is no water in the return water pipe or the water volume is low, the float 4 does not rise or rises only a small distance, and the float 4 is outside the detection range of the inductive proximity switch 1. At this time, the ball mill's control system disconnects the power circuit, and the ball mill stops. When the water volume increases, the float 4 rises into the detection range of the inductive proximity switch 1 and is detected. The ball mill's control system then connects the power circuit, and the ball mill operates normally. Because the bottom of the mounting hole for the inductive proximity switch 1 on the measuring base 2 is closed, the water inside the housing 3 does not come into contact with the inductive proximity switch 1, achieving non-contact measurement. Compared with baffle-type flow switches, this overcomes the inability to operate or malfunctions caused by poor water quality conditions. Compared with thermal flow switches, it avoids detection failure caused by water contamination of the sensor.

[0028] As an alternative, the limiting structure in this embodiment includes a support plate 6 and four stop rods 5 (in other embodiments, there may be three or more than four). The upper end of the stop rods 5 is fixedly connected to the measuring seat 2, and the stop rods 5 are evenly spaced along the circumference of the measuring seat 2. The float 4 is confined between the stop rods 5. The support plate 6 is fixedly connected to the bottom of the stop rods 5 to support the float 4. In practical applications, the bottom of the measuring seat 2 is provided with holes that mate with the stop rods 5. The stop rods 5 and the holes on the measuring seat 2 are fixedly connected by an interference fit. The support plate 6 is connected to the bottom of the stop rods by screws or adhesive. It is worth noting that the stop rods 5 can prevent the float 4 from drifting laterally (i.e., in the radial direction of the measuring seat 2), and also avoid the siphon phenomenon that causes the float 4 to block the outlet 3011 and prevent it from rising and falling normally. In other embodiments, the limiting structure can of course take other forms, such as using a filter screen or a rod through the middle of the float 4. In this embodiment, the filter screen or rod through the middle of the float 4 is not used in order to prevent blockage or the gap between the float 4 rod and the ball from being blocked by foreign objects.

[0029] It should be understood that the working principle of the inductive proximity switch 1 is to induce eddy currents in a metal object through a high-frequency alternating magnetic field, causing the energy of the original magnetic field to decay, thereby triggering the internal circuit to convert it into a switching signal, achieving non-contact metal detection. It is easy to understand that in practical applications, the inductive proximity switch 1 should be explosion-proof, and its specific brand and model are not specifically limited. For example, the brand could be Pepperl+Fuchs and the model NJ2-V3-N; or the brand could be Omron and the model E2E-X10MC1. Because the float 4 needs to be detected by the inductive sensor, the float 4 should be made of conductive metal. At the same time, the measuring base 2 and the stop lever in the limiting structure should not affect the normal operation of the inductive sensor, and their materials should be non-metallic. As an option, in this embodiment, the measuring base 2 is made of polytetrafluoroethylene (PTFE); the float 4 is made of stainless steel; and the stop lever 5 is made of polyvinyl chloride (PVC). Since the support piece 6 in the limiting structure is outside the detection range of the inductive proximity switch 1, its specific material is not limited. Preferably, in this embodiment, the same material as the stop bar 5 is still selected.

[0030] As an alternative, in this embodiment, the lower end of the measuring seat 2 is connected to the connection port 3012 by a thread, which facilitates adjustment of the distance between the bottom of the measuring seat 2 and the upper edge of the outlet 3011. It is easy to understand that in practical applications, a sealing measure (not shown in the figure) is taken between the measuring seat 2 and the connection port 3012 to ensure a sealing effect. Furthermore, the distance between the upper edge of the outlet 3011 and the bottom of the measuring seat 2 is preferably 4.5mm-5.5mm. If this distance is too small (i.e., the measuring seat 2 is installed too deep), it will affect the maximum water flow discharge, resulting in a throttling situation; if this distance is too large (i.e., the measuring seat 2 is installed too high), the float 4 will have too much upward space, and the float 4 will easily jump with fluctuations in water pressure, leading to unstable detection. In practical applications, the distance between the upper edge of the outlet 3011 and the bottom of the measuring seat 2 can be selected from values ​​such as 4.5mm, 5mm, and 5.5mm. Preferably, the distance between the upper edge of the outlet 3011 and the bottom of the measuring seat 2 is 5mm.

[0031] Alternatively, in this embodiment, the inductive proximity switch 1 is connected to the mounting hole via a thread. After adjusting the installation depth of the inductive proximity switch 1, it is tightened using the loosening nut provided with the inductive proximity switch 1. In practical applications, by adjusting the installation depth of the inductive proximity switch 1, the detection height of the initial water flow can be changed. It is easy to understand that when the inductive proximity switch 1 is lowered, the float 4 can be detected at a lower position; conversely, when the inductive proximity switch 1 is raised, the float 4 needs to float a greater distance to be detected. This facilitates increasing or decreasing the starting flow rate, thus making it easy to adjust the initial flow rate that enables the ball mill to start and stop.

[0032] refer to Figure 3 Alternatively, housing 3 includes a reducing tee 301 and a reducing elbow 302. The reducing elbow 302 is connected to the bottom interface of the reducing tee 301. That is, housing 3 is directly composed of the reducing tee 301 and the reducing elbow 302, which can be purchased directly from the market. The connection method between the reducing elbow 302 and the reducing tee 301 is not limited, for example, welding. Furthermore, depending on the actual installation requirements on site, housing 3 may also include an extension pipe (not shown), which is connected between the reducing tee 301 and the reducing elbow 302. Alternatively, the extension pipe can be connected as follows: both ends of the extension pipe have external threads, and the upper end of the reducing elbow 302 and the lower end of the reducing tee 301 have corresponding internal threads. The extension pipe is fixed to the reducing tee 301 and the reducing elbow 302 by threaded connection. It is easy to understand that sealing measures should be taken at the connection (not shown).

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A float-type water flow switch device, characterized in that, include: The shell has a water inlet at the bottom, a connection port at the top, and a water outlet on the middle side. The measuring base has a lower end that connects to the connector, and a bottom-closed mounting hole at the upper end. An inductive proximity switch is installed inside a mounting hole; And a float that can be detected by an inductive proximity switch, with a limiting structure fixedly connected to the bottom of the measuring base to restrict the lateral movement of the float.

2. The float-type water flow switch device according to claim 1, characterized in that, The limiting structure includes a support plate and at least three stop bars. The upper end of the stop bars is fixedly connected to the measuring seat, and the stop bars are evenly spaced along the circumference of the measuring seat. The float is restricted between the stop bars, and the support plate is fixedly connected to the bottom of the stop bars to support the float.

3. The float-type water flow switch device according to claim 1, characterized in that, The lower end of the measuring base is connected to the connection port by a thread.

4. The float-type water flow switch device according to claim 1, characterized in that, The inductive proximity switch is connected to the mounting hole via a thread.

5. The float-type water flow switch device according to claim 1, characterized in that, The housing includes a reducing tee and a reducing elbow, with the reducing elbow connected to the bottom interface of the reducing tee.

6. The float-type water flow switch device according to claim 5, characterized in that, The housing also includes an extension tube, which is connected between the reducing tee and the reducing elbow.

7. The float-type water flow switch device according to claim 1, characterized in that, The distance between the upper edge of the water outlet and the bottom of the measuring seat is 4.5mm-5.5mm.

8. The float-type water flow switch device according to claim 1, characterized in that, The measuring seat is made of polytetrafluoroethylene.

9. The float-type water flow switch device according to claim 1, characterized in that, The float is made of stainless steel.

10. The float-type water flow switch device according to claim 2, characterized in that, The stop bar is made of polyvinyl chloride.

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