Adjustable flow switch

Abstract

The utility model provides an adjustable flow switch which comprises a shell, a medium inlet and a medium outlet are respectively arranged at two ends of the shell, a check ring allowing a medium to pass through is arranged in the shell, and the adjustable flow switch further comprises a flow sensing assembly arranged in the shell. The flow sensing assembly comprises a hollow valve element movably arranged in the check ring in the axial direction in a penetrating mode, a reed pipe arranged in the hollow valve element and a ferromagnetic unit arranged on the outer side of the hollow valve element in a sliding and sleeving mode, the ferromagnetic unit is magnetically connected with the reed pipe, the hollow valve element is sleeved with a spring, one end of the spring abuts against one side of the ferromagnetic unit, and the other end of the spring abuts against the other side of the ferromagnetic unit. And the other side of the ferromagnetic unit is separably propped against the retainer ring. According to the adjustable flow switch provided by the utility model, the flow sensing assembly is arranged, and the position of the reed switch is changed by adjusting the position of the hollow valve core of the flow sensing assembly, so that the flow switch meets the requirements of different flows, and the applicability of the flow switch is relatively high.

Description

Technical Field

[0001] The utility model relates to the technical field of flow switches, in particular to an adjustable flow switch. Background Art

[0002] Flow switches are primarily installed in-line or plug-in form in pipelines containing media such as water, gas, and oil to monitor the flow rate in the system. When the flow rate exceeds or falls below a set value, an alarm signal is triggered and transmitted to the unit. The system then receives the signal and responds accordingly. To prevent or reduce dry-burning of the unit, a reed flow switch uses magnetic field fluctuations to control the on / off of an electrical circuit. It combines the basic principle of a reed switch (also known as a reed switch) with the function of flow monitoring. The operating principle of a reed flow switch is that when a medium with a constant flow rate passes through the flow switch, a magnet approaches the reed switch, closing the circuit. When the flow rate decreases or increases, the magnet moves away from the reed switch, separating the two reeds, disconnecting the circuit and executing the corresponding command. Reed flow switches have a wide range of applications, including home appliances, automotive, communications, industrial, and medical. They are used in fluid control equipment and are particularly important in applications that require monitoring the flow rate of media such as water, gas, and oil.

[0003] However, the existing reed flow switch can only adapt to media with a specific flow rate and cannot be adjusted according to the flow rate of the medium. The applicability of the flow switch is not strong. This solution solves this technical problem. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present invention provides an adjustable flow switch, which is equipped with a flow sensing component. By adjusting the position of the hollow valve core of the flow sensing component, the position of the reed switch is changed, so that the flow switch can meet the requirements of different flow rates. The flow switch has strong applicability.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an adjustable flow switch, comprising a shell, a medium inlet and a medium outlet are respectively provided at both ends of the shell, a retaining ring is provided in the shell for allowing the medium to pass through, and also includes a flow sensing component arranged in the shell, the flow sensing component includes a hollow valve core axially movably arranged in the retaining ring, a reed switch arranged in the hollow valve core, and a ferromagnetic unit slidably sleeved on the outside of the hollow valve core, the ferromagnetic unit is magnetically connected to the reed switch, a spring is sleeved on the outside of the hollow valve core, one end of the spring abuts against one side of the ferromagnetic unit, and the other side of the ferromagnetic unit is detachably abutted against the retaining ring, and an installation component for installing the flow sensing component is provided on the side of the shell, and the other end of the spring abuts against the installation component.

[0006] The mounting assembly includes an upper cover connected to the housing, the upper cover is provided with an internal thread, the outer side of the hollow valve core is provided with an external thread, and the hollow valve core is threadedly connected to the upper cover.

[0007] The ferromagnetic unit includes a piston block slidably mounted on the outside of one end of the hollow valve core, a magnet ring coaxially connected to the piston block, the magnet ring is detachably magnetically connected to the reed switch, one end of the piston block abuts against the retaining ring, and one end of the spring is connected to the other end of the piston block.

[0008] One end of the piston block in contact with the retaining ring is in a truncated cone shape.

[0009] A circuit board is provided in the hollow valve core, the reed switch is electrically connected to the circuit board, and the circuit board is connected to an external power supply.

[0010] The installation assembly further includes a sealing unit sleeved on the outside of the hollow valve core, and an installation groove for accommodating the sealing unit is provided on the inner side of one end of the upper cover.

[0011] An external thread is provided on the outer side of one end of the upper cover, and a locking nut for fixing the sealing unit is sleeved on the outer side of one end of the upper cover.

[0012] The sealing unit includes a stainless steel washer, a Teflon sealing ring and a stainless steel sleeve which are sequentially sleeved on the outside of the hollow valve core, and the stainless steel sleeve is arranged close to the locking nut.

[0013] The upper cover is threadedly connected to the shell, and a sealing ring is provided between the upper cover and the shell.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) A flow sensing component is provided. By adjusting the position of the hollow valve core of the flow sensing component, the position of the reed switch is changed, so that the flow switch can meet the needs of different flow rates. The flow switch has strong applicability, and the hollow valve core is threadedly connected to the upper cover. The position of the reed switch can be adjusted by screwing the hollow valve core, making the adjustment of the flow switch convenient and quick;

[0016] (2) A spring is provided on the outer side of the hollow valve core. One end of the spring abuts against one side of the piston block in the ferromagnetic unit, and the other end of the spring abuts against the upper shell of the mounting assembly. The elastic force of the spring balances the pressure of the medium flow. The flow switch can be installed at any angle, avoiding the special requirements of gravity on the installation angle of the flow switch. The installation of the flow switch is convenient and quick, saving time and effort.

[0017] (3) The sealing unit consists of a stainless steel gasket, a Teflon sealing ring, and a stainless steel sleeve, and is locked by a locking nut. The movement of the hollow valve core is firm and reliable, and the sealing effect of the flow switch is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional structural diagram of the present utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the housing of the utility model;

[0020] Figure 3 This is a schematic diagram of the external structure of the flow sensing component of the utility model;

[0021] Figure 4 It is a schematic diagram of the external structure of the utility model.

[0022] Among them, in the figure: 1. Shell; 11. Medium inlet; 12. Medium outlet; 13. Retaining ring; 2. Flow sensing component; 21. Hollow valve core; 22. Circuit board; 221. Reed switch; 23. Ferromagnetic unit; 231. Piston block; 232. Magnet ring; 24. Spring; 3. Mounting assembly; 31. Upper cover; 311. Sealing ring; 32. Sealing unit; 321. Stainless steel gasket; 322. Teflon sealing ring; 323. Stainless steel sleeve; 34. Mounting groove; 35. Locking nut. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0024] See also Figure 1-Figure 4, an adjustable flow switch, including a shell 1, with a medium inlet 11 and a medium outlet 12 respectively provided at both ends of the shell 1, a retaining ring 13 for allowing the medium to pass through is provided in the shell 1, and also includes a flow sensing component 2 arranged in the shell 1, the flow sensing component 2 includes a hollow valve core 21 movably arranged in the retaining ring 13 along the axial direction, a reed switch 221 provided in the hollow valve core 21, and a ferromagnetic unit 23 slidably sleeved on the outside of the hollow valve core 21, the ferromagnetic unit 23 is magnetically connected to the reed switch 221, and a spring 24 is sleeved on the outside of the hollow valve core 21, one end of the spring 24 abuts against one side of the ferromagnetic unit 23, and the other side of the ferromagnetic unit 23 detachably abuts against the retaining ring 13, and a mounting component 3 for mounting the flow sensing component 2 is provided on the side of the shell 1, and the other end of the spring 24 abuts against the mounting component 3.

[0025] The mounting assembly 3 includes an upper cover 31 connected to the housing 1 . The upper cover 31 is provided with an internal thread. The outer side of the hollow valve core 21 is provided with an external thread. The hollow valve core 21 is threadedly connected to the upper cover 31 .

[0026] The ferromagnetic unit 23 includes a piston block 231 that is slidably mounted on the outside of one end of the hollow valve core 21, a magnet ring 232 that is coaxially connected to the piston block 231, and a detachable magnetic connection between the magnet ring 232 and the reed switch 221. One end of the piston block 231 abuts against the retaining ring 13, and one end of the spring 24 is connected to the other end of the piston block 231.

[0027] The end of the piston block 231 that contacts the retaining ring 13 is in a truncated cone shape.

[0028] A circuit board 22 is disposed in the hollow valve core 21 . The reed switch 221 is electrically connected to the circuit board 22 , and the circuit board 22 is connected to an external power source.

[0029] The mounting assembly 3 further includes a sealing unit 32 sleeved on the outside of the hollow valve core 21 , and an installation groove 34 for accommodating the sealing unit 32 is provided on the inner side of one end of the upper cover 31 .

[0030] An external thread is provided on the outer side of one end of the upper cover 31 , and a locking nut 35 for fixing the sealing unit 32 is sleeved on the outer side of one end of the upper cover 31 .

[0031] The sealing unit 32 includes a stainless steel washer 321 , a Teflon sealing ring 322 and a stainless steel sleeve 323 which are sequentially sleeved on the outside of the hollow valve core 21 . The stainless steel sleeve 323 is arranged close to the locking nut 35 .

[0032] The upper cover 31 is threadedly connected to the housing 1 , and a sealing ring 311 is provided between the upper cover 31 and the housing 1 .

[0033] One end of the hollow valve core 21 close to the locking nut 35 is provided with a flat head for screwing operation.

[0034] The specific working process and principle of this utility model:

[0035] When in use, the flow switch is installed in place according to the medium flow direction indicated by the arrow. When the medium flows from the medium inlet 11 through the retaining ring 13, the piston block 231 is pushed away from the retaining ring 13 by a certain distance, forming a flow channel, and finally flows out from the medium outlet 12. When the flow rate of the medium is constant, the piston block 231 overcomes the elastic force of the spring 24 and slides along the hollow valve core 21 for a certain distance and then stops. At this time, the pressure generated by the medium flow on the piston block 231 is balanced with the elastic force of the spring 24, and the magnet ring 232 is at the position of the reed switch 221 on the circuit board 22. At this time, the reed switch 221 is opened by the magnetic effect of the magnet, and the circuit board 22 transmits a signal to execute the corresponding instruction. At this time, the flow rate of the medium is normal; if the flow rate of the medium decreases or increases, the piston block 231 is affected by the pressure of the medium, the piston block 231 slides along the hollow valve core 21, the magnet ring 232 moves away from the reed switch 221, the reed switch 221 is disconnected, and the disconnect signal is transmitted through the circuit board 22 to execute the corresponding instruction;

[0036] If the medium flow requirement changes, the flow sensing component 2 can be adjusted to adapt to the requirements of different flow media, specifically as follows: if the medium flow requirement becomes smaller, by screwing the flat head of the hollow valve core 21, due to the threaded connection between the hollow valve core 21 and the upper cover 31, the hollow valve core 21 moves downward, and the hollow valve core 21 drives the circuit board 22 to slide a set distance toward the end close to the magnet ring 232. At this time, a smaller medium flow can enable the piston block 231 to drive the magnet ring 232 to reach the corresponding position of the reed switch 221, and the reed switch 221 is connected at this time; on the contrary, if the medium flow requirement becomes larger, the hollow valve core 21 is screwed in the opposite direction, so that the medium with a larger flow can overcome the elastic force of the spring 24 and make the magnet ring 232 reach the position of the reed switch 221, so that the reed switch 221 is connected.

[0037] A flow sensing component 2 is provided. By adjusting the position of the hollow valve core 21 of the flow sensing component 2, the position of the reed tube 221 is changed, so that the flow switch can meet the needs of different flow rates. The flow switch has strong applicability, and the hollow valve core 21 is threadedly connected to the upper cover 31. The position of the reed tube 221 can be adjusted by screwing the hollow valve core 21, so that the adjustment of the flow switch is convenient and quick.

[0038] A spring 24 is provided on the outer side of the hollow valve core 21. One end of the spring 24 abuts against one side of the piston block 231 in the ferromagnetic unit 23, and the other end of the spring 24 abuts against the upper shell of the mounting assembly 3. The elastic force of the spring 24 balances the pressure of the medium flow. The flow switch can be installed at any angle, avoiding the special requirements of gravity on the installation angle of the flow switch. The installation of the flow switch is convenient and quick, saving time and effort.

[0039] The sealing unit 32 is composed of a stainless steel gasket 321, a Teflon sealing ring 322, and a stainless steel sleeve 323, and is locked by a locking nut 35. The movement of the hollow valve core 21 is firm and reliable, and the sealing effect of the flow switch is better.

[0040] The technical features not described in the present invention can be realized by or by adopting the existing technology, and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. An adjustable flow switch, comprising a housing (1), wherein both ends of the housing (1) are provided with a medium inlet (11) and a medium outlet (12), characterized in that: The housing (1) is provided with a retaining ring (13) for allowing a medium to pass through, and also includes a flow sensing component (2) provided in the housing (1), the flow sensing component (2) including a hollow valve core (21) movably provided in the retaining ring (13) along the axial direction, a reed switch (221) provided in the hollow valve core (21), and a ferromagnetic unit (23) slidably sleeved on the outside of the hollow valve core (21), the ferromagnetic unit (23) and the reed switch (221) being magnetically connected, a spring (24) is sleeved on the outside of the hollow valve core (21), one end of the spring (24) abuts against one side of the ferromagnetic unit (23), and the other side of the ferromagnetic unit (23) abuts against the retaining ring (13) in a detachable manner, and a mounting component (3) for mounting the flow sensing component (2) is provided on the side of the housing (1), and the other end of the spring (24) abuts against the mounting component (3).

2. The adjustable flow switch according to claim 1, characterized in that: The mounting assembly (3) comprises an upper cover (31) connected to the housing (1), wherein the upper cover (31) is provided with an internal thread, and the outer side of the hollow valve core (21) is provided with an external thread, and the hollow valve core (21) is threadedly connected to the upper cover (31).

3. The adjustable flow switch according to claim 2, characterized in that: The ferromagnetic unit (23) includes a piston block (231) slidably mounted on the outside of one end of the hollow valve core (21), a magnet ring (232) coaxially connected to the piston block (231), the magnet ring (232) and the reed switch (221) being separably magnetically connected, one end of the piston block (231) abutting against the retaining ring (13), and one end of the spring (24) being connected to the other end of the piston block (231).

4. The adjustable flow switch according to claim 1, characterized in that: A circuit board (22) is provided in the hollow valve core (21), the reed switch (221) is electrically connected to the circuit board (22), and the circuit board (22) is connected to an external power supply.

5. The adjustable flow switch according to claim 2, characterized in that: The installation assembly (3) further comprises a sealing unit (32) sleeved on the outside of the hollow valve core (21), and an installation groove (34) for accommodating the sealing unit (32) is provided on the inner side of one end of the upper cover (31).

6. The adjustable flow switch according to claim 5, characterized in that: An external thread is provided on the outer side of one end of the upper cover (31), and a locking nut (35) for fixing the sealing unit (32) is sleeved on the outer side of one end of the upper cover (31).

7. The adjustable flow switch according to claim 6, characterized in that: The sealing unit (32) comprises a stainless steel washer (321), a Teflon sealing ring (322) and a stainless steel sleeve (323) which are sequentially sleeved on the outside of the hollow valve core (21), and the stainless steel sleeve (323) is arranged close to the locking nut (35).

8. The adjustable flow switch according to claim 2, characterized in that: The upper cover (31) is threadedly connected to the housing (1), and a sealing ring (311) is provided between the upper cover (31) and the housing (1).

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