Gas flow switch

Abstract

The gas flow switch provided by the utility model comprises a shell, a containing cavity is arranged in the shell, the gas flow switch further comprises a floating magnetic module vertically and movably arranged in the containing cavity and a magnetic reed switch arranged on the side portion of the shell, and the floating magnetic module is in separable magnetic connection with the magnetic reed switch. An air inlet hole communicated with the bottom of the containing cavity is formed in the shell in a penetrating mode, an exhaust hole communicated with the top of the containing cavity is formed in the top of the shell in a penetrating mode, and the floating magnetic module is installed in the containing cavity through the exhaust hole. According to the gas flow switch provided by the utility model, the floating magnetic module is arranged in the accommodating cavity through the exhaust hole, and the floating magnetic module is arranged in the accommodating cavity through the clamping ring which is separably propped against the clamping groove, so that the floating magnetic module is relatively convenient to install, and when the gas flow switch needs to be checked and maintained, the floating magnetic module can be arranged in the accommodating cavity. The floating magnetic module can be taken out to maintain the interior of the gas flow switch by disassembling the clamping ring, and the gas flow switch is convenient and fast to install, check and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid monitoring, in particular to a gas flow switch. Background Technique

[0002] A flow switch is a device used to monitor the flow of media such as water, oil, and gas in a pipeline. The working principle of the flow switch is based on when the media flows through the switch, when the flow rate of the media reaches the set value, the flow switch will send out an on signal; when the flow rate of the media exceeds or is less than the set flow rate, the switch will send out an off signal. These two signals are respectively input into the control system of the device to achieve the function of flow control. When detecting gas media, a special gas flow switch is often used. By real-time monitoring the flow state of the gas, the flow switch can avoid or reduce the damage of the device caused by abnormal flow, thereby protecting the safe operation of the device and the system. The gas flow switch needs to be inspected and maintained regularly to ensure its normal operation.

[0003] The existing gas flow switch needs to be removed for inspection and maintenance. However, due to the relatively complex structure of the gas flow switch, it is not convenient to install and disassemble, which leads to inconvenient inspection and maintenance of the gas flow switch. This solution aims to solve this technical problem. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a gas flow switch. The floating magnetic module is installed into the accommodation cavity through the exhaust hole, and the floating magnetic module is installed into the accommodation cavity by a snap ring that can be detachably abutted in the card slot. The installation of the floating magnetic module is relatively convenient. When it is necessary to inspect and maintain the gas flow switch, the snap ring can be disassembled to take out the floating magnetic module for maintaining the inside of the gas flow switch. The installation inspection and maintenance of the gas flow switch are convenient and fast.

[0005] To achieve the above object, the technical solution adopted by the utility model is: a gas flow switch, including a housing, an accommodation cavity is arranged inside the housing, and further includes a floating magnetic module vertically movably arranged in the accommodation cavity and a reed switch arranged at the side position of the housing. The floating magnetic module is magnetically connected to the reed switch in a separable manner. The housing is provided with an air inlet hole communicating with the bottom of the accommodation cavity in a penetrating manner, and the top of the housing is provided with an exhaust hole communicating with the top of the accommodation cavity in a penetrating manner. The floating magnetic module is installed into the accommodation cavity through the exhaust hole.

[0006] A card slot is arranged between the exhaust hole and the accommodation cavity, and a snap ring for preventing the floating magnetic module from falling out of the accommodation cavity is detachably arranged in the card slot.

[0007] The housing is made of acrylic material. A receiving groove for receiving the reed switch is provided on the side of the housing, and the reed switch is installed in the receiving groove from the open end of the receiving groove.

[0008] The snap ring is integrally processed from a metal wire. The snap ring includes an arc support portion that can be detachably abutted against the card slot, a bending portion connected between the two arc support portions, and the other ends of the two arc support portions are bent inward to form ends.

[0009] An annular retaining platform is provided between the receiving cavity and the air inlet hole. One side of the annular retaining platform is detachably abutted against the bottom end of the floating magnetic module, and the other side of the annular retaining platform is communicated with the air inlet hole, and the inner diameter of one end of the annular retaining platform is smaller than the diameter of the air inlet hole.

[0010] The floating magnetic module includes a float and a magnet coaxially arranged in the float. The magnet is detachably magnetically connected to the reed switch.

[0011] The reed switch is installed in the receiving groove through a heat shrinkable tube.

[0012] The reed switch is connected with a terminal through a wire, and a sheath is arranged on the outer side of the wire.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] (1) The floating magnetic module is installed into the receiving cavity from the exhaust hole, and the floating magnetic module is installed into the receiving cavity through a snap ring detachably abutted in the card slot. The installation of the floating magnetic module is relatively convenient. When it is necessary to check and maintain the gas flow switch, the snap ring can be disassembled to take out the floating magnetic module for maintaining the inside of the gas flow switch. The installation, inspection and maintenance of the gas flow switch are convenient and fast;

[0015] (2) The housing is made of acrylic material, and the state of the float in the receiving cavity, the state of the reed switch and the cleanliness of the receiving cavity can be observed in real time. The working condition of the flow switch can be checked in real time without disassembly. The inspection and maintenance of the gas flow switch are convenient and fast;

[0016] (3) By pressing the end of the snap ring, the bending portion is deformed, so that the arc support portion is separated from the card slot, and the snap ring is taken out. The design of the snap ring is delicate, and the installation and disassembly are convenient and fast, improving the maintenance efficiency of the gas flow switch;

[0017] (4) One side of the annular retaining platform is detachably abutted against the bottom end of the float. The other side of the annular retaining platform communicates with the air inlet hole, and one end of the inner diameter of the annular retaining platform is smaller than the diameter of the air inlet hole. Through the setting of the annular retaining platform, on the one hand, the support effect on the float is better, avoiding the jamming of the float in the accommodation cavity. On the other hand, through the limiting effect of the annular retaining platform, the connection between the external pipeline and the air inlet hole is more firm and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 is a schematic installation structure diagram of the snap ring of the present utility model;

[0020] Figure 3 is a schematic structure diagram of the snap ring of the present utility model.

[0021] Among them, in the figure: 1. Housing; 11. Accommodation cavity; 12. Air inlet hole; 13. Exhaust hole; 14. Card slot; 15. Accommodation groove; 16. Annular retaining platform; 2. Floating magnetic module; 21. Float; 22. Magnet; 3. Magnetic reed switch; 4. Snap ring; 41. Arc support part; 42. Bending part; 43. End part; 5. Heat shrinkable tube; 6. Wire; 7. Terminal; 8. Sheath. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to more clearly illustrate the technical features of the present solution, the present solution will be described below through specific embodiments.

[0023] Refer to Figures 1 - 3 , the gas flow switch includes a housing 1. An accommodation cavity 11 is provided inside the housing 1. It further includes a floating magnetic module 2 vertically movably arranged in the accommodation cavity 11 and a magnetic reed switch 3 arranged at the side part of the housing 1. The floating magnetic module 2 is magnetically connected to the magnetic reed switch 3 in a separable manner. The housing 1 is provided with an air inlet hole 12 communicating with the bottom of the accommodation cavity 11 through it, and the top of the housing 1 is provided with an exhaust hole 13 communicating with the top of the accommodation cavity 11 through it. The floating magnetic module 2 is loaded into the accommodation cavity 11 from the exhaust hole 13.

[0024] A card slot 14 is provided between the exhaust hole 13 and the accommodation cavity 11, and a snap ring 4 for preventing the floating magnetic module 2 from coming out of the accommodation cavity 11 is detachably clamped in the card slot 14.

[0025] The housing 1 is made of acrylic material. An accommodation groove 15 for accommodating the magnetic reed switch 3 is provided at the side part of the housing 1, and the magnetic reed switch 3 is installed in the accommodation groove 15 from the open end of the accommodation groove 15.

[0026] The snap ring 4 is integrally processed from a wire. The snap ring 4 includes an arc support portion 41 that can be detachably abutted against the card slot 14, a bent portion 42 connected between the two arc support portions 41, and the other ends of the two arc support portions 41 are bent inward to form end portions 43.

[0027] An annular retaining platform 16 is provided between the accommodating cavity 11 and the air inlet hole 12. One side of the annular retaining platform 16 is detachably abutted against the bottom end of the floating magnetic module 2, and the other side of the annular retaining platform 16 is communicated with the air inlet hole 12, and the inner diameter of one end of the annular retaining platform 16 is smaller than the diameter of the air inlet hole 12.

[0028] The floating magnetic module 2 includes a float 21 and a magnet 22 coaxially arranged inside the float 21. The magnet 22 is detachably magnetically connected to the magnetic reed switch 3, and the float 21 is a columnar structure.

[0029] The magnetic reed switch 3 is installed in the accommodating groove 15 through a heat shrinkable tube 5, and the heat shrinkable tube 5 is made of a transparent material.

[0030] The magnetic reed switch 3 is connected with a wiring terminal 7 through a wire 6, and a sheath 8 is arranged outside the wire 6.

[0031] The specific working process and principle of the present utility model:

[0032] First, install the air inlet hole 12 and the exhaust hole 13 of the gas flow switch vertically in the gas pipeline in the installation direction of bottom-in and top-out, and insert the wiring terminal 7 into the controller to complete the installation of the gas flow switch.

[0033] When gas passes through the accommodating cavity 11 from the air inlet hole 12, the air flow lifts the float 21 to a certain height, then passes through the gap between the float 21 and the accommodating cavity 11 and is discharged through the exhaust hole 13. When the gas flow is stable, the gravity of the entire floating magnetic module 2 is balanced with the pressure generated by the air flow. At this time, the positions of the magnet 22 and the magnetic reed switch 3 correspond, and the magnetic reed switch 3 is turned on. When the air flow becomes smaller or larger, the pressure generated by the air flow becomes larger or smaller, which causes the magnet 22 in the float 21 to move away from the magnetic reed switch 3, so that the magnetic reed switch 3 is turned off, and the controller executes corresponding instructions to avoid damage to the equipment.

[0034] The floating magnetic module 2 is installed into the accommodating cavity 11 from the exhaust hole 13, and the floating magnetic module 2 is installed in the accommodating cavity 11 through the snap ring 4 that is detachably abutted in the card slot 14. The installation of the floating magnetic module 2 is relatively convenient. When it is necessary to check and maintain the gas flow switch, the snap ring 4 can be disassembled to take out the floating magnetic module 2 for maintenance of the inside of the gas flow switch. The installation, inspection and maintenance of the gas flow switch are convenient and fast;

[0035] The housing 1 is made of acrylic material, which can observe the state of the float 21, the state of the reed switch 3 and the cleanliness in the accommodation chamber 11 in real time. The working conditions of the flow switch can be checked in real time without disassembly, and the inspection and maintenance of the gas flow switch are convenient and fast;

[0036] By pressing the end 43 of the snap ring 4, the bent portion 42 is deformed, so that the arc support portion 41 is disengaged from the card slot 14, and the removal of the snap ring 4 is completed. The design of the snap ring 4 is delicate, and the installation and removal are convenient and fast, improving the maintenance efficiency of the gas flow switch;

[0037] One side of the annular retaining platform 16 is detachably abutted against the bottom end of the float 21, the other side of the annular retaining platform 16 is communicated with the air inlet hole 12, and the inner diameter of one end of the annular retaining platform 16 is smaller than the diameter of the air inlet hole 12. Through the setting of the annular retaining platform 16, on the one hand, the support effect on the float 21 is better, avoiding the jamming of the float 21 in the accommodation chamber 11, and on the other hand, through the limiting effect of the annular retaining platform 16, the connection between the external pipeline and the air inlet hole 12 is more firm and reliable.

[0038] The technical features not described in the present utility model can be realized by or adopted the prior art, and will not be elaborated here. Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A gas flow switch, comprising a housing (1), wherein a receiving chamber (11) is provided in the housing (1), characterized in that: It also comprises a floating magnetic module (2) vertically movably arranged in the accommodating cavity (11), and a reed switch (3) arranged at a side position of the shell (1); the floating magnetic module (2) and the reed switch (3) are separably connected magnetically; the shell (1) is provided with an air inlet (12) communicating with the bottom of the accommodating cavity (11); the top of the shell (1) is provided with an air outlet (13) communicating with the top of the accommodating cavity (11); the floating magnetic module (2) is loaded into the accommodating cavity (11) through the air outlet (13).

2. The gas flow switch according to claim 1, characterized in that: A clamping groove (14) is provided between the exhaust hole (13) and the accommodating cavity (11), and a detachable clamp in the clamping groove (14) is provided with a clamping ring (4) for preventing the floating magnetic module (2) from falling out of the accommodating cavity (11).

3. The gas flow switch according to claim 2, characterized in that: The housing (1) is made of acrylic material, and a receiving groove (15) for receiving the reed switch (3) is provided on the side of the housing (1); the reed switch (3) is installed in the receiving groove (15) through an open end of the receiving groove (15).

4. The gas flow switch according to claim 2, characterized in that: The clamping ring (4) is integrally formed from a metal wire, and comprises an arc support portion (41) that is detachably abutted against the clamping groove (14), a bent portion (42) connected between two of the arc support portions (41), and the other ends of the two arc support portions (41) are bent inwardly to form an end portion (43).

5. The gas flow switch according to claim 3, characterized in that: An annular stopper (16) is provided between the accommodating cavity (11) and the air inlet hole (12); one side of the annular stopper (16) is detachably abutted against the bottom end of the floating magnetic module (2); the other side of the annular stopper (16) is connected to the air inlet hole (12); and one end of the inner diameter of the annular stopper (16) is smaller than the diameter of the air inlet hole (12).

6. The gas flow switch according to claim 3, characterized in that: The floating magnetic module (2) comprises a float (21) and a magnet (22) coaxially arranged inside the float (21); the magnet (22) is separably magnetically connected to the reed switch (3).

7. The gas flow switch according to claim 3, characterized in that: The reed switch (3) is installed in the containing groove (15) via a heat shrink tube (5).

8. The gas flow switch according to claim 7, characterized in that: The reed switch (3) is connected to a wiring terminal (7) via a wire (6), and a sheath (8) is provided on the outside of the wire (6).

Images