Elastic tongue type flow switch for shield pump

Abstract

The utility model discloses a flow switch for an elastic tongue type shield pump, which comprises a top cover (1), a reed switch main body seat (2) and a switch main body (3) which are sequentially connected, a cavity chamber (4) is arranged in the switch main body (3), two sides of the cavity chamber (4) are respectively communicated with an inlet (5) and an outlet (6), and the lower edge of the inlet (5) is provided with a water retaining edge (7); the cavity chamber (4) is rotationally provided with an elastic valve leaf (8), and the inlet (5) and the outlet (6) are separated by the elastic valve leaf (8); the bottom edge of the elastic valve leaf (8) abuts against the water retaining edge (7). And a magnet (9) for realizing magnetic induction with the reed switch in the reed switch main body seat (2) is arranged at the upper end of the elastic valve leaf (8). According to the utility model, the position of the magnet is sensed and changed relative to the reed pipe under the action of water flow, so that the on-off of signals output by the reed pipe is realized, and the accuracy of start-stop judgment of the low-voltage shield pump is improved.

Description

Technical Field

[0001] The utility model relates to the field of flow switch equipment, in particular to a tongue-type flow switch for a shielded pump. Background Art

[0002] A low-pressure canned motor pump is a special type of booster pump. A specially designed diaphragm and shielding structure isolates the pump's rotor from the stationary stator, reducing vibration and noise. It utilizes magnetic force to transmit power, allowing the rotor to rotate within the conveyed medium, achieving leak-free boosting. The need for small-scale boosting in households is driving increasing demand for this pump. Conventional canned motor pumps on the market currently use current and power detection to determine when to start and stop the pump. Under low-voltage and low-power conditions, current and power detection maintains the voltage constant. At low power levels, the load changes minimally, making power changes less noticeable. This can lead to misjudgments, resulting in the pump starting and stopping incorrectly, causing significant distress to users. Utility Model Content

[0003] The purpose of this utility model is to provide a spring-loaded flow switch for a canned motor pump. This switch uses the action of water flow to induce a position change of a magnet relative to a reed switch, thereby switching the reed switch's output signal on and off, and improving the accuracy of starting and stopping low-pressure canned motor pumps.

[0004] The technical solution of the utility model is as follows: a spring-loaded flow switch for a shielded pump, comprising a top cover, a reed switch main body seat and a switch main body connected in sequence, wherein the switch main body has a cavity chamber, the two sides of the cavity chamber are respectively connected with an inlet and an outlet, and the lower edge of the inlet is provided with a water retaining edge; the cavity chamber is rotatably provided with an elastic valve leaf, which separates the inlet and the outlet; the bottom edge of the elastic valve leaf conflicts with the water retaining edge; the upper end of the elastic valve leaf is provided with a magnet for realizing magnetic induction with the reed switch in the reed switch main body seat.

[0005] In the above-mentioned tongue-type shielded pump flow switch, the elastic valve page includes a page plate, the upper end of the page plate has a fixed shaft rotatably connected to the inner wall of the cavity, a torsion spring is sleeved on the fixed shaft, one end of the torsion spring is in conflict with the inner wall of the cavity, and the other end of the torsion spring is in conflict with the page plate; the upper end of the fixed shaft is provided with a magnet slot for placing a magnet; the edge of the page plate is in conflict with the water retaining edge.

[0006] In the aforementioned tongue-type flow switch for a shielded pump, one side of the page plate has a slot, and one end of the torsion spring is embedded in the slot.

[0007] In the aforementioned tongue-type flow switch for a shielded pump, the reed switch main body seat includes a seat body, the seat body has a top seat, the top seat has a square groove for installing the reed switch, and the top seat has symmetrically arranged connecting holes.

[0008] In the aforementioned tongue-type shielded pump flow switch, a groove is provided in the top cover, the top seat is embedded in the groove, and the top cover has symmetrically arranged through holes, and screws are provided in the through holes and the connecting holes.

[0009] In the aforementioned tongue-type flow switch for a shielded pump, the reed switch body seat has a circular groove, the circular groove is provided with symmetrical arc grooves, and one side of the arc groove has a locking protrusion; the upper end of the switch body has arc strips that are symmetrical to each other and fit with the arc grooves, and one side of the arc strip is provided with a locking groove that fits with the locking protrusion.

[0010] In the aforementioned tongue-type flow switch for a shielded pump, the bottom of the flow channel of the outlet has an inclined portion.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. In the present invention, the elastic valve leaf is arranged in a cavity, and a magnet is arranged on the upper end of the elastic valve leaf. The magnet and the reed switch in the reed switch main body seat have mutual magnetic induction. When there is no water, the elastic valve leaf is in a tightly closed state, and the bottom edge of the elastic valve leaf will be tightly attached to the water retaining edge. At this moment, the position of the magnet relative to the reed switch provides a disconnection signal. When water flows into the impact valve leaf from the inlet of the switch body, the elastic valve leaf is opened to a certain angle after overcoming the resistance of the elastic part in the elastic valve leaf. At this moment, the position of the magnet and the reed switch provides a conduction signal; when the controller of the low-pressure shielded pump receives the disconnection signal, it determines that the low-pressure shielded pump is in the shutdown state; when the controller of the low-pressure shielded pump receives the conduction signal, it determines that the low-pressure shielded pump is in the startup state; the present invention causes the position of the magnet relative to the reed switch to undergo position induction change through the action of water flow, thereby realizing the on-off signal output by the reed switch, thereby improving the accuracy of the start-stop judgment of the low-pressure shielded pump.

[0013] 2. The top cover is connected to the main body of the reed switch with screws to prevent the reed switch from being pulled out due to external tension acting on the reed switch lead.

[0014] 3. The bottom of the flow channel of the outlet has an inclined portion, and the leaf plate is parallel to the inclined portion when it is at the maximum opening angle, so that the water flow through the switch body maintains the maximum flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 is a schematic diagram of an elastic valve page;

[0017] Figure 3 is a schematic diagram of a torsion spring;

[0018] Figure 4 is a schematic diagram of the top seat;

[0019] Figure 5 is a schematic diagram of the top cover;

[0020] Figure 6 is a schematic diagram of an arc groove;

[0021] Figure 7 Schematic diagram of the engaging protrusion.

[0022] Explanation of the marks in the accompanying drawings: 1. Top cover; 2. Reed switch main body seat; 3. Switch body; 4. Cavity; 5. Inlet; 6. Outlet; 7. Water retaining edge; 8. Elastic valve leaf; 9. Magnet; 10. Leaf plate; 11. Fixed shaft; 12. Torsion spring; 13. Magnet slot; 14. Slot; 21. Seat body; 22. Top seat; 23. Square slot; 24. Connecting hole; 25. Circular slot; 26. Arc-shaped slot; 27. Engaging protrusion; 28. Arc-shaped strip; 29. ​​Engaging slot; 101. Groove; 102. Through hole; 103. Screw; 61. Inclined portion. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0024] Embodiment: A tongue-type flow switch for a shielded pump comprises a top cover 1, a reed switch main body seat 2 and a switch main body 3 connected in sequence, as shown in the attached Figure 1 As shown; the switch body 3 has a cavity 4 inside. The switch body is composed of two parts spliced ​​together to facilitate disassembly and cleaning of the switch body. The two sides of the cavity 4 are connected to an inlet 5 and an outlet 6 respectively. Water flows in from the inlet and out from the opening. The lower edge of the inlet 5 has a water retaining edge 7. The cavity 4 is installed with an elastic valve leaf 8, which separates the inlet 5 and the outlet 6. Figure 2 As shown, a magnet 9 is installed on the upper end of the elastic valve leaf 8, and the magnet 9 realizes magnetic induction with the reed switch in the main body seat 2 of the reed switch; the bottom edge of the elastic valve leaf 8 conflicts with the water retaining edge 7; the elastic valve leaf 8 includes a page plate 10, and the upper end of the page plate 10 has a fixed shaft 11 rotatably connected to the inner wall of the cavity 4. The inner wall of the cavity has a circular hole, and the fixed shaft is stuck in the circular hole. When the water flow hits the page plate, it rotates around the fixed shaft. A torsion spring 12 is sleeved on the fixed shaft 11, as shown in the attached figure. Figure 3As shown, one end of the torsion spring 12 contacts the inner wall of the cavity 4, and the other end of the torsion spring 12 contacts the leaf plate 10. The leaf plate 10 has a slot 14 on one side, and one end of the torsion spring 12 is embedded in the slot 14, which can effectively fix the spring and increase the stability of the structure. The upper end of the fixed shaft 11 is provided with a magnet slot 13 for accommodating the magnet 9. The edge of the leaf plate 10 contacts the water retaining edge 7, which can effectively achieve the valve leaf closed in the absence of water or water backflow. When there is no water, the leaf plate is in a closed state under the action of the torsion spring elastic force. The bottom of the flow channel of the outlet 6 has an inclined portion 61. When the leaf plate is at the maximum opening angle, it is parallel to the inclined portion, so that the water flow through the switch body maintains the maximum flow rate.

[0025] The reed switch main body 2 includes a seat body 21, and a top seat 22 is provided on the seat body 21. Figure 4 As shown, the top base 22 has a square slot 23 for mounting a reed switch. A reed switch is an electrical switch operated by an applied magnetic field. It consists of two magnetic reeds (usually made of iron and nickel) sealed in a glass tube. The two reeds overlap with a small gap between them. A suitable external magnetic field will cause the two reeds to contact. The top base 22 has symmetrically arranged connection holes 24.

[0026] The top cover 1 is provided with a groove 101, as shown in the attached Figure 5 As shown, the top seat 22 is embedded in the groove 101, and the structure connected by the two is stable through this fitting structure. The top cover 1 has symmetrically arranged through holes 102, and screws 103 are provided in the through holes 102 and the connecting holes 24; the top cover and the reed switch main body seat are connected by screws to prevent the reed switch from being pulled out due to external tension acting on the reed switch lead.

[0027] The reed switch main body 2 has a circular groove 25, and a symmetrical arc groove 26 is provided in the circular groove 25. Figure 6 As shown, one side of the arc groove 26 has a locking protrusion 27; the upper end of the switch body 3 has a mutually symmetrical arc strip 28 that fits with the arc groove 26, and one side of the arc strip 28 has a locking groove 29 that fits with the locking protrusion 27, as shown in the attached Figure 7 As shown, the arc strip and the arc groove cooperate with each other, the engaging protrusion is embedded in the engaging groove, the switch body and the reed switch body seat are tightly connected, and the structure is stable.

[0028] The working principle of the present invention is as follows: the elastic valve leaf is arranged in a cavity, and a magnet is arranged on the upper end of the elastic valve leaf. The magnet and the reed switch in the reed switch main body seat have mutual magnetic induction. When there is no water, the elastic valve leaf is in a tightly closed state, and the bottom edge of the elastic valve leaf will be in close contact with the water retaining edge. At this moment, the position of the magnet relative to the reed switch provides a disconnection signal. When water flows into the impact valve leaf from the inlet of the switch body, the elastic valve leaf is opened to a certain angle after overcoming the resistance of the elastic part in the elastic valve leaf. At this moment, the position of the magnet and the reed switch provides a conduction signal; when the controller of the low-pressure shielded pump receives the disconnection signal, it is determined that the low-pressure shielded pump is in a shutdown state. When the controller of the low-pressure shielded pump receives the conduction signal, it is determined that the low-pressure shielded pump is in a startup state. The present invention causes the magnet to undergo position induction changes relative to the reed switch through the action of water flow, thereby realizing the on-off signal output by the reed switch and improving the accuracy of the start-stop judgment of the low-pressure shielded pump.

Claims

1. A tongue-type flow switch for a shielded pump, comprising a top cover (1), a reed switch main body seat (2) and a switch main body (3) connected in sequence, characterized in that: The switch body (3) has a cavity (4) therein, and the two sides of the cavity (4) are respectively connected with an inlet (5) and an outlet (6), and the lower edge of the inlet (5) is provided with a water retaining edge (7); the cavity (4) is rotatably provided with an elastic valve leaf (8), and the elastic valve leaf (8) separates the inlet (5) and the outlet (6); the bottom edge of the elastic valve leaf (8) is in conflict with the water retaining edge (7); the upper end of the elastic valve leaf (8) is provided with a magnet (9) for achieving magnetic induction with a reed switch in the reed switch body seat (2).

2. The tongue-type flow switch for a shielded pump according to claim 1, characterized in that: The elastic valve leaf (8) includes a leaf plate (10), the upper end of the leaf plate (10) is provided with a fixed shaft (11) rotatably connected to the inner wall of the cavity (4), a torsion spring (12) is sleeved on the fixed shaft (11), one end of the torsion spring (12) is in contact with the inner wall of the cavity (4), and the other end of the torsion spring (12) is in contact with the leaf plate (10); the upper end of the fixed shaft (11) is provided with a magnet slot (13) for accommodating a magnet (9); the edge of the leaf plate (10) is in contact with the water retaining edge (7).

3. The tongue-type flow switch for a shielded pump according to claim 2, characterized in that: One side of the page plate (10) is provided with a slot (14), and one end of the torsion spring (12) is embedded in the slot (14).

4. The tongue-type flow switch for a shielded pump according to claim 1, characterized in that: The reed switch main body seat (2) comprises a seat body (21), the seat body (21) is provided with a top seat (22), the top seat (22) is provided with a square groove (23) for installing the reed switch, and the top seat (22) is provided with symmetrically arranged connecting holes (24).

5. The tongue-type flow switch for a shielded pump according to claim 4, characterized in that: A groove (101) is provided in the top cover (1), and the top seat (22) is embedded in the groove (101). The top cover (1) has symmetrically arranged through holes (102), and screws (103) are provided in the through holes (102) and the connecting holes (24).

6. The tongue-type flow switch for a shielded pump according to claim 1, characterized in that: The reed switch main body seat (2) has a circular groove (25) in it, a symmetrical arc groove (26) is provided in the circular groove (25), and a locking protrusion (27) is provided on one side of the arc groove (26); the upper end of the switch main body (3) has arc strips (28) that are symmetrical to each other and fit with the arc groove (26), and a locking groove (29) that fits with the locking protrusion (27) is provided on one side of the arc strip (28).

7. The tongue-type flow switch for a shielded pump according to claim 1, characterized in that: The flow channel bottom of the outlet (6) has an inclined portion (61).

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