阅读说明：本技术 一种三相单控大功率浮球开关 (Three-phase single-control high-power float switch ) 是由 冯魁廷 于 2019-10-05 设计创作，主要内容包括：本发明公开了一种三相单控大功率浮球开关,包括套管、浮球、三个电极对、第一磁铁、第二磁铁、配重；浮球套在套管外部；套管内中心嵌有第一磁铁,第一磁铁中心对称布置三个电极对；每个电极对均包括固定电极、活动电极；固定电极固定在套管内；套管内均布三个活动空腔,三个活动电极分别设置在三个活动空腔内,活动电极设置在固定电极与第一磁铁之间；在第一磁铁作用下,活动电极与固定电极处于分离状态；浮球一端内嵌有环形的第二磁铁；第二磁铁磁力大于第一磁铁磁力；套管上端外部固定有阻挡部；浮球与阻挡部之间还设有第三磁铁,以对浮球和阻挡部之间提供磁力；所述浮球下端连接有配重。本发明可实现较大液面差的大功率三相电控制。(The invention discloses a three-phase single-control high-power floating ball switch which comprises a sleeve, a floating ball, three electrode pairs, a first magnet, a second magnet and a counterweight, wherein the sleeve is sleeved on the floating ball; the floating ball is sleeved outside the sleeve; a first magnet is embedded in the center of the sleeve, and three electrode pairs are arranged in the first magnet in a centrosymmetric manner; each electrode pair comprises a fixed electrode and a movable electrode; the fixed electrode is fixed in the sleeve; three movable cavities are uniformly distributed in the sleeve, three movable electrodes are respectively arranged in the three movable cavities, and the movable electrodes are arranged between the fixed electrodes and the first magnet; under the action of the first magnet, the movable electrode and the fixed electrode are in a separated state; one end of the floating ball is embedded with an annular second magnet; the magnetic force of the second magnet is greater than that of the first magnet; a blocking part is fixed outside the upper end of the sleeve; a third magnet is arranged between the floating ball and the blocking part to provide magnetic force between the floating ball and the blocking part; the lower end of the floating ball is connected with a balance weight. The invention can realize high-power three-phase electric control with larger liquid level difference.)

1. A three-phase single-control high-power float switch is characterized by comprising a sleeve (1), a float ball (2), three electrode pairs, a first magnet (5), three second magnets (6), a counterweight (7) and a reset spring (18);

the floating ball (2) is sleeved outside the sleeve (1); a first magnet (5) is embedded in the center of the sleeve (1), and three electrode pairs are symmetrically arranged around the first magnet (5); each electrode pair comprises a fixed electrode (41) and a movable electrode (31); the fixed electrode (41) is fixed on the inner wall of the sleeve (1); three cavities are uniformly distributed in the sleeve (1), three movable electrodes (31) are respectively arranged in the three movable cavities, the movable electrodes (31) are arranged between the fixed electrode (41) and the first magnet (5), a return spring (18) is arranged between the movable electrodes (31) and the sleeve (1), the movable electrodes (31) and the fixed electrode (41) are in a separated state under the action of the first magnet (5) and the return spring (18), and the end part of the return spring (18) is fixed by an insulating ring (13); a plurality of arc-shaped second magnets (6) are embedded in one end of the floating ball (2), and the second magnets (6) can slide up and down along the sleeve (1) along with the floating ball (2); the magnetic force of the second magnet (6) is greater than the sum of the magnetic force of the first magnet (5) and the elastic force of the return spring (18); a blocking part (10) is fixed outside the upper end of the sleeve (1) to limit the rising position of the floating ball (2); a third magnet (21) is arranged between the floating ball (2) and the blocking part (10) to provide magnetic force between the floating ball (2) and the blocking part (10); the lower end of the floating ball (2) is connected with a balance weight (7) through a hook (12).

2. The three-phase single-control high-power floating ball switch according to claim 1, wherein the weight of the counterweight (7) is greater than the buoyancy of liquid; the sum of the magnetic force between the third magnet (21) and the floating ball (2) and the magnetic force between the second magnet 6 and the movable electrode 31 is larger than the weight of the floating ball (2) and smaller than the weight of the floating ball (2) and the counterweight (7).

3. The three-phase single-control high-power float switch according to claim 1, wherein the sleeve (1) is a cambered triangle body formed by splicing three cambered convex surfaces, and the central angle of each cambered convex surface is 120 degrees; the fixed electrode (41) and the movable electrode (31) are both arc-shaped, and the arc-shaped angle is the same as the central angle of the corresponding arc-shaped convex surface.

4. The floating ball switch with three-phase single-control high power of claim 1, wherein the blocking portion (10) is provided with a plurality of grooves for accommodating the third magnet (21); and flat iron rings (11) are embedded in the two ends of the floating ball (2).

5. The three-phase single-control high-power floating ball switch according to claim 1, wherein a plurality of third magnets (21) are arranged at two ends of the floating ball (2); the blocking part (10) is made of magnetic conductive materials or embedded with a flat iron ring (11).

6. The three-phase single-control high-power floating ball switch according to claim 1, wherein a clamping groove for fixing a clamping ring (16) is further formed at the lower end of the sleeve (1).

7. The three-phase single-control high-power floating ball switch as claimed in claim 1, wherein two ends of the floating ball (2) are connected with three traction and suspension lines (14) and a suspension rack (15) through a hook (12); the upper end of the counterweight (7) is connected with the middle of the hanging frame (15) through a traction and hanging wire (14).

8. The three-phase single-control high-power float switch according to claim 1, characterized in that the sleeve (1) is made of insulating PP material or ceramic material.

9. The three-phase single-control high-power floating ball switch as claimed in claim 1, wherein the housing of the floating ball (2) is made of stainless steel material and filled with foamed polyurethane.

10. The three-phase single-control high-power float switch as claimed in claim 1, wherein said movable electrode (31) is a combination of galvanized soft iron and red copper, the contact surface is red copper, and the back surface is galvanized soft iron.

Technical Field

The invention belongs to the field of liquid level sensing automatic control, and particularly relates to a three-phase single-control high-power float switch.

Background

At present, mainstream float switches in the electric control market are mainly divided into a reed switch, a mercury switch and a KEY float switch. The reed switch is switched on and off under the action of a magnet through the reed switch, and is divided into a normally closed type and a normally open type, so that the reed switch has the defects of small switching current and about 10W of power, and a single switch can only control the water level of a point; the mercury switch is designed by utilizing the conductivity and the fluidity of mercury, the switch ball is controlled by overturning and moving the mercury ball, although the current is slightly larger than that of a reed switch and a certain interlayer water level can be controlled, the environmental pollution is large after later maintenance and damage. The two switches are single switches, and the control of the high-power equipment is completed through a relay, so that the complexity of a circuit is increased, the cost is increased, the maintenance difficulty is increased, the later stage of the float switch has no expansibility, and the product limitation is very large. And the three-phase large power is controlled by a relay.

Disclosure of Invention

The invention aims to provide a three-phase single-control high-power float switch to realize high-power three-phase electric control with larger liquid level difference.

The technical solution for realizing the purpose of the invention is as follows:

a three-phase single-control high-power floating ball switch comprises a sleeve, a floating ball, three electrode pairs, a first magnet, three second magnets, a counterweight and a reset spring;

the floating ball is sleeved outside the sleeve; a first magnet is embedded in the center of the sleeve, and three electrode pairs are symmetrically arranged around the first magnet; each electrode pair comprises a fixed electrode and a movable electrode; the fixed electrode is fixed on the inner wall of the sleeve; three cavities are uniformly distributed in the sleeve, three movable electrodes are respectively arranged in the three movable cavities, the movable electrodes are arranged between the fixed electrode and the first magnet, a return spring is arranged between the movable electrodes and the sleeve, the movable electrodes and the fixed electrode are in a separated state under the action of the first magnet and the return spring, and the end part of the return spring is fixed by an insulating ring; a plurality of arc-shaped second magnets are embedded in one end of the floating ball, and the second magnets can slide up and down along the sleeve along with the floating ball; the magnetic force of the second magnet is greater than the sum of the magnetic force of the first magnet and the elastic force of the return spring; a blocking part is fixed outside the upper end of the sleeve to limit the rising position of the floating ball; a third magnet is arranged between the floating ball and the blocking part to provide magnetic force between the floating ball and the blocking part; the lower end of the floating ball is connected with a balance weight through a hook.

Compared with the prior art, the invention has the following remarkable advantages:

(1) the float switch of the invention can be directly connected with high-power equipment through a wire to control the working state of the high-power equipment, and does not need to be connected with other electrical equipment, thereby realizing the automatic control of the three-phase high-power electrical equipment.

(2) The invention realizes the control of the liquid level difference by adjusting the distance between the floating ball and the balance weight, can realize the control of larger liquid level difference by only adjusting the length of the suspension wire, and has low cost.

(3) The float switch can realize two working modes through the adjustment of the direction of the float, and can be used for a single-control drainage mode and a single-control water injection mode.

Drawings

FIG. 1 is a schematic diagram of the conducting state of the switch of the present invention as a three-phase single-control drainage mode.

FIG. 2 is a schematic diagram of the structure of the switch of the present invention in a three-phase single-control water injection module off state.

Fig. 3 is a schematic top view of the barrier.

Fig. 4(a-b) are a cross-sectional view and a top view, respectively, of the casing.

Fig. 5(a-e) are schematic cross-sectional views 1-1 to 5-5, respectively, of fig. 4 a.

Fig. 6(a-c) are schematic cross-sectional views of the sleeve in the conducting state and the disconnecting state of the electrode pair, and a longitudinal cross-sectional view in the conducting state, respectively.

Fig. 7 is a schematic view of a hanger structure.

Fig. 8 is a schematic diagram of the switch in a water filling working state.

FIG. 9 is a schematic view of the switch in a water-filling stop state.

Fig. 10 is a schematic view of the switch in a drainage stop state.

Fig. 11 is a schematic view of the switch in a drainage operation state.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

With reference to fig. 1-4, the three-phase single-control high-power float switch of the present invention comprises a sleeve 1, a float 2, three electrode pairs, a first magnet 5, a second magnet 6, a counterweight 7, and a return spring (18);

the floating ball 2 is sleeved outside the sleeve 1; a first magnet 5 is embedded in the center of the sleeve 1, and three electrode pairs are symmetrically arranged around the first magnet 5; each electrode pair includes a fixed electrode 41, a movable electrode 31; the fixed electrode 41 is fixed in the sleeve 1; three cavities are uniformly distributed in the sleeve 1, three movable electrodes 31 are respectively arranged in the three movable cavities, and the movable electrodes 31 are arranged between the fixed electrode 41 and the first magnet 5; a return spring 18 is arranged between the movable electrode 31 and the sleeve 1, the end part of the return spring 18 is fixed with the sleeve 1 by an insulating ring 13, and the movable electrode 31 and the fixed electrode 41 are in a separated state under the action of the first magnet 5 and the return spring 18; a plurality of annular second magnets 6 are embedded in one end of the floating ball 2, and the second magnets 6 can slide up and down along the sleeve 1 along with the floating ball 2; the magnetic force of the second magnet 6 is greater than the sum of the magnetic force of the first magnet 5 and the elastic force of the return spring 18; a blocking part 10 is fixed outside the upper end of the sleeve 1 to limit the rising position of the floating ball 2; a third magnet 21 is arranged between the floating ball 2 and the blocking part 10 to provide magnetic force between the floating ball 2 and the blocking part 10; the lower end of the floating ball 2 is connected with a counterweight 7.

Further, the weight of the counterweight 7 is larger than the liquid buoyancy; the sum (adjustable) of the magnetic forces between the third magnet 21 and the floating ball 2 and between the second magnet 6 and the movable electrode 31 is greater than the weight of the floating ball 2 and less than the weight of the floating ball 2 and the counterweight 7. Therefore, when the liquid level drops to the height position of the counterweight 7, the weight of the counterweight 7 and the floating ball 2 is larger than the suction force of the third magnet 21, and the floating ball 2 falls down to change the on-off state of the switch.

Further, referring to fig. 4(a-b), fig. 5(a-e) and fig. 6(a-c), the sleeve 1 is a triangular arc-shaped body and forms arc-shaped contact with the floating ball 2. The triangular body is formed by splicing three arc-shaped convex surfaces, and the central angle of each arc-shaped convex surface is 120 degrees; the fixed electrode 41 and the movable electrode 31 are both arc-shaped, and the arc-shaped angle is the same as the central angle of the corresponding arc-shaped convex surface. The arc-shaped movable electrode is a combination of the galvanized soft iron and the copper, the inner side of the arc-shaped movable electrode is the galvanized soft iron, and the outer side of the arc-shaped movable electrode is the copper (contact surface). The same arc of contact surface ensures a larger area of electrical contact, while the arc provides a relatively large space for the inner first magnet 5.

As an embodiment, referring to fig. 7, the lower end of the floating ball 2 is connected with a hanging frame 15 (a tripod) through a hook 12 and three traction lines 14; the upper end of the counterweight 7 is connected with the middle of the hanging frame 15 through a traction hanging wire 14, the distance between the counterweight 7 and the floating ball 2 can be adjusted through the hanging wire 14, the liquid level difference can be adjusted through the length of the counterweight 7 hanging wire, and a switch can control a large liquid level difference.

As an embodiment, referring to fig. 3, a plurality of third magnets 21 (the number of which is adjustable) are provided on the blocking portion 10; and flat iron rings 11 are embedded in the two ends of the floating ball 2. In another embodiment, a plurality of third magnets 21 are arranged at two ends of the floating ball 2; the blocking part 10 is made of magnetic conductive material or embedded with a flat iron ring 11. Both of the above manners may provide a magnetic force between the stopper 10 and the third magnet 21.

Furthermore, the lower end of the sleeve 1 is also provided with a snap ring 16, the snap ring 16 can ensure that the floating ball 2 is always sleeved on the sleeve 1, and the descending position of the floating ball 2 can be limited; meanwhile, the open ring 16 is detached, the floating ball 2 can turn around up and down and then is installed on the sleeve 1, the upper end and the lower end of the floating ball 2 are provided with the hooks 12 of the traction lines 14, so that the balance weight 7 can be hung in two directions, and the switching of two working modes of water injection control and water drainage control can be realized by adjusting the direction of the floating ball 2.

Further, the sleeve 1 is made of insulating materials such as insulating PP materials or ceramics; the shell of the floating ball 2 is made of 304 stainless steel and is filled with foamed polyurethane; the balance weight 7 can be a hollow ball, liquid is injected into the hollow ball, and the weight of the hollow ball can be adjusted by adjusting the amount of the liquid in the hollow ball. The movable electrode (31) is a combination of galvanized soft iron and red copper, the contact surface is the red copper, and the back surface is the galvanized soft iron (conductive magnetic material).

The fixed electrode 41 and the movable electrode 31 of the float switch are respectively led out through the lead 9 and the lead 8, so that two operation modes of a single switch can be realized: (1) when the second magnet 6 is positioned at the lower end in the floating ball 2, the floating ball 2 is attracted with the blocking part 10 under the action of the third magnet 21, the second magnet 6 is just opposite to the electrode pair, the magnetic force of the second magnet 6 is greater than that of the first magnet 5, the movable electrode 31 is in contact with the fixed electrode 41 under the action of the attraction force of the second magnet 6, the three electrode pairs are in a conduction state, and the motor is in a drainage mode. When the liquid level drops to a certain position of the counterweight 7, the original stress balance is destroyed, the floating ball 2 begins to drop and is separated from the blocking part 10, so that the second magnet 6 is staggered with the electrode pair, at the moment, under the action of the first magnet 5 and the reset spring 18, the movable electrode 31 is separated from the fixed electrode 41, the three electrode pairs are in a disconnected state, and the three-phase single-control drainage mode is realized. (2) The floating ball is turned around and installed, when the second magnet 6 is positioned at the upper end in the floating ball 2, the floating ball is attracted with the blocking part 10 under the action of the third magnet 21, at the moment, the second magnet 6 is staggered with the electrode pair, and a motor connected with the switch is in a non-working state. When the liquid level drops to a certain position of the counterweight 7, the original stress balance is damaged, the floating ball 2 begins to drop and is separated from the blocking part 10, so that the second magnet 6 is opposite to the electrode pair, the three electrode pairs are in a conducting state, and the motor is in a working state to realize a three-phase single-control water injection mode.

The mechanical principle and the operation condition of the invention are stressed as shown in figures 8-11:

1. when F3> F1+ G1+ G2-F4. When the liquid level rises to reach a certain height of the floating ball, the power supply is cut off, the operation of the high-power pump is stopped, the closing function of the switch is realized, and the water injection working state is changed into a water injection stopping state. The filling control is carried out, wherein the filling control is started when the filling control is lower than a certain liquid level line and is closed when the filling control is higher than the certain liquid level line.

Wherein F3 is the maximum buoyancy of the floating ball 2; f1 is the attraction force between the second magnet 6 and the electrode pair; g1 is the weight of the whole floating ball 2, G2 is the weight of the counterweight 7, the bracket 15 and the connecting line 14; f4 is the maximum buoyancy of counterweight 7.

2. G1< F2< G1+ G2. Is a condition for shifting the water-filling stop state to the water-filling operation state.

3. F1+ F2< G1+ G2. When the liquid level is lowered to a certain height, the power supply is cut off, the operation of the high-power pump is stopped, the closing function of the switch is realized, and the drainage stop state is changed into the drainage working state. The pumping control is started when the liquid level is higher than a certain liquid level line and is closed when the liquid level is lower than the certain liquid level line.

4. F3> G1+ G2-F4. Is a condition for transition from the drainage operation state to the drainage stop state.