Liquid level switch and liquid level control device

Abstract

The utility model discloses a liquid level switch, which comprises a first electrode stem, a second electrode stem, a third electrode stem, an insulating plate and insulating sleeves, the insulating plate is provided with three insulating plate through holes, the three insulating sleeves are respectively connected in the three insulating plate through holes, and the inner wall of each insulating sleeve is longitudinally provided with a plurality of positioning pits; the first electrode stem, the second electrode stem and the third electrode stem are different in length and are sleeved with the three insulating sleeves respectively, electrode stem blind holes are formed in the outer walls of the first electrode stem, the second electrode stem and the third electrode stem respectively, springs and balls are installed in the electrode stem blind holes, the balls are located at the front ends of the springs, and the balls are located in the positioning pits. The utility model further discloses a liquid level control device. According to the utility model, starting and stopping points of the motor under different liquid levels can be adjusted according to field requirements, and liquid level control of flexibly changing parameters is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of liquid level control device, concretely relates to a liquid level switch and liquid level control device. BACKGROUND

[0002] At present, the interlocking control of commonly used liquid level switch and motor generally has two kinds, the first kind is that the liquid level switch is connected into the automatic control system, and the motor start-stop control is carried out through program setting, the second kind is that the position signal is received through the liquid level relay, and the motor start-stop is controlled through the on-off of the liquid level relay.

[0003] The three-leg liquid level switch made through the liquid level relay is fixed liquid level stroke, and is once formed according to specific use place, so that it cannot be adjusted according to actual conditions, cannot be replaced in use occasions, and utilization efficiency is low. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a liquid level switch and liquid level control device, which can adjust the start-stop points of the motor under different liquid levels according to the field requirements, and realize the liquid level control of flexible parameter change.

[0005] Technical scheme as follows:

[0006] The liquid level switch comprises a first electrode rod, a second electrode rod, a third electrode rod, an insulating plate and an insulating sleeve, the insulating plate is provided with three insulating plate through holes, three insulating sleeves are connected in the three insulating plate through holes respectively, and the inner wall of the insulating sleeve is longitudinally provided with a plurality of positioning recesses;The lengths of the first electrode rod, the second electrode rod and the third electrode rod are different, and the first electrode rod, the second electrode rod and the third electrode rod are respectively sleeved in the three insulating sleeves, the outer walls of the first electrode rod, the second electrode rod and the third electrode rod are respectively provided with electrode rod blind holes, springs and balls are installed in the electrode rod blind holes, the ball is located at the front end of the spring, and the ball is located in the positioning recess.

[0007] Further, the top ends of the first electrode rod, the second electrode rod and the third electrode rod are respectively provided with terminal blocks.

[0008] Further, the terminal block selects a terminal ring.

[0009] Further, the outer diameter of the terminal ring is greater than the outer diameter of the insulating sleeve.

[0010] Further, the first electrode rod, the second electrode rod and the third electrode rod adopt white steel rods, and the insulating sleeve adopts a PVC sleeve.

[0011] The liquid level control device comprises a liquid level switch and a liquid level relay, and the top ends of the first electrode rod, the second electrode rod and the third electrode rod are respectively connected to the liquid level relay through wires.

[0012] Preferably, the first electrode rod, the second electrode rod and the third electrode rod are connected to three corresponding circuits of the liquid level relay through wires respectively.

[0013] Preferably, the first electrode rod, the second electrode rod and the third electrode rod are connected to three corresponding circuits of the liquid level relay through wires respectively.

[0014] Preferably, the first electrode rod, the second electrode rod and the third electrode rod are connected to three corresponding circuits of the liquid level relay through wires respectively.

[0015] Preferably, the first electrode rod, the second electrode rod and the third electrode rod are connected to three corresponding circuits of the liquid level relay through wires respectively.

[0016] The utility model has the following advantages compared with prior art:

[0017] 1. The utility model discloses a liquid level switch, which can adjust the start-stop point of the motor under different liquid levels according to the on-site demand, realize flexible parameter change of the liquid level control, and be suitable for different application occasions.

[0018] The utility model discloses a liquid level switch, which can adjust the start-stop point of the motor under different liquid levels according to the on-site demand, realize flexible parameter change of the liquid level control, and be suitable for different application occasions.

[0019] 2. The utility model discloses a liquid level switch, which can directly enter the motor control circuit without connecting the control system such as PLC or DCS, does not need the automatic control system, can flexibly control the start-stop of the motor according to the liquid level, and can adjust the liquid level control range and the liquid level action interval according to the demand.

[0020] 3. The utility model discloses a liquid level switch, which is simple in material use, convenient in manufacturing, and can realize the automatic start-stop control of the motor under the unattended state, thereby improving the production efficiency. DRAWINGS

[0021] Figure 1 is the structure schematic view of the liquid level switch in the utility model.

[0022] Figure 2 is Figure 1 the enlarged view of A in the utility model. DETAILED DESCRIPTION

[0023] The following description fully illustrates the specific implementation of the utility model, so that those skilled in the art can practice and reproduce it.

[0024] As Figure 1 shown, it is the structure schematic view of the liquid level switch in the utility model. Figure 2 As Figure 1 shown, it is the enlarged view of A in the utility model.

[0025] The liquid level switch comprises a first electrode rod 1, a second electrode rod 2, a third electrode rod 3, an insulating plate 4, and an insulating sleeve 5. The insulating plate 4 is provided with three insulating plate through holes, and the three insulating sleeves 5 are connected in the three insulating plate through holes respectively. The inner wall of the insulating sleeve 5 is longitudinally provided with a plurality of positioning recesses. The lengths of the first electrode rod 1, the second electrode rod 2, and the third electrode rod 3 are different, and the first electrode rod 1, the second electrode rod 2, and the third electrode rod 3 are sleeved in the three insulating sleeves 5 respectively. The outer wall of the first electrode rod 1, the second electrode rod 2, and the third electrode rod 3 is provided with an electrode rod blind hole respectively, and a spring 6 and a ball 7 are installed in the electrode rod blind hole. The ball 7 is located at the front end of the spring 6, and the ball 7 is located in the positioning recess.

[0026] The top end of the first electrode rod 1, the second electrode rod 2, and the third electrode rod 3 is provided with a wiring ring 8, which is used as a wiring terminal.

[0027] The first electrode rod 1, the second electrode rod 2, and the third electrode rod 3 adopt white steel rods, and the length is less than 100 mm. The insulating sleeve 5 adopts a PVC sleeve, and the tube length is 100 mm. The outer diameter of the wiring ring 8 is greater than the outer diameter of the insulating sleeve 5.

[0028] The liquid level control device comprises a liquid level switch and a liquid level relay. The wiring ring 8 of the first electrode rod 1, the second electrode rod 2, and the third electrode rod 3 of the liquid level switch is connected to the three corresponding loops of the liquid level relay through wires respectively. Alternatively, the wiring ring 8 is connected to three liquid level relays through wires respectively.

[0029] The use method is as follows:

[0030] The three first electrode rods 1, the second electrode rod 2, and the third electrode rod 3 are respectively a common electrode, a high liquid level electrode, and a low liquid level electrode. The wiring ring 8 of the first electrode rod 1, the second electrode rod 2, and the third electrode rod 3 is connected to the corresponding loop of the three liquid level relays through wires respectively, and the liquid level relay is connected to the control system of the motor. The start and stop liquid level of the pump motor is determined by the different heights of the bottom ends of the first electrode rod 1, the second electrode rod 2, and the third electrode rod 3 from the liquid surface. The second electrode rod 2 and the third electrode rod 3 of the high liquid level electrode and the low liquid level electrode are lifted to the corresponding liquid level and locked, the electrode working length under the PVC plate is fixed, the electrodes are parallel and do not cross, and the liquid level switch can be put into use. The first electrode rod 1, the second electrode rod 2, and the third electrode rod 3 can be moved and adjusted in length, and can be adjusted according to the changes of working conditions and requirements. The liquid level switch can be used without connecting to the automatic control system, and does not need an automatic control environment.

[0031] Embodiment 1

[0032] The utility model is installed in environmental protection workshop water pump house, and the waste liquid pit of water pump house is the lowest point of the whole factory, and the accumulated water and accident leakage of pipe gallery finally converge to the place. The operator needs to start and stop the collection pump according to the liquid level of the scene, and the liquid level changes very fast in the rainy season, so a special person is needed to be responsible, and the pump needs to be started and stopped once every 30 to 40 minutes on average, which is easy to cause the hidden danger that the equipment cannot normally run due to waterlogging of the pit. In 2021 and 2022, the pit waterlogging and pump flooding occurred, all pumps were restored after 6 hours in 2021, 6 tons of oxide were produced per hour, the rare earth oxide output was affected by 36 tons, and the output value loss was 2,829,600 yuan; all pumps were restored after 8 hours in 2022, the rare earth oxide output was affected by 48 tons, and the output value loss was 3,772,800 yuan;

[0033] After setting the start and stop liquid level points, the wastewater collection pump can be automatically started and stopped according to the liquid level, and the phenomenon of waterlogging of the pit due to the failure of the collection pump to start does not occur. After installing the utility model, the on-site personnel do not need to control the motor start and stop by going down the pit through the stairs according to the monitoring, and the start and stop liquid level can be flexibly adjusted, so that the waste liquid collection pump can be automatically started and stopped in the unattended condition.

[0034] The terms used in the utility model are illustrative and non-limiting terms. Since the utility model can be embodied in various forms without departing from the spirit or essence of the technical scheme, it should be understood that the above examples are not limited to any of the above details, but should be widely interpreted within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A liquid level switch, characterized in that: include: The first electrode rod, the second electrode rod, the third electrode rod, the insulating plate, and the insulating sleeve are provided with three insulating plate through-holes. The three insulating sleeves are respectively connected to the three insulating plate through-holes. The inner wall of the insulating sleeve is longitudinally provided with multiple positioning pits. The first electrode rod, the second electrode rod, and the third electrode rod have different lengths and are respectively sleeved in the three insulating sleeves. The outer walls of the first electrode rod, the second electrode rod, and the third electrode rod are respectively provided with electrode rod blind holes. Springs and balls are installed in the electrode rod blind holes. The balls are located at the front end of the springs and in the positioning pits.

2. The liquid level switch according to claim 1, characterized in that: The top ends of the first electrode rod, the second electrode rod and the third electrode rod are respectively provided with connection terminals.

3. The liquid level switch according to claim 2, characterized in that: The terminal blocks are wire rings.

4. The liquid level switch according to claim 3, characterized in that: The outer diameter of the wiring ring is larger than the outer diameter of the insulating sleeve.

5. The liquid level switch according to claim 1, characterized in that: The first electrode rod, the second electrode rod and the third electrode rod are made of white steel rods, and the insulating sleeve is made of PVC sleeve.

6. A liquid level control device using the liquid level switch according to any one of claims 1 to 4, characterized in that: The invention comprises a liquid level relay, wherein the top ends of the first electrode rod, the second electrode rod and the third electrode rod are respectively connected to the liquid level relay through wires.

7. The liquid level control device according to claim 6, characterized in that: The first electrode rod, the second electrode rod and the third electrode rod are respectively connected to three corresponding circuits of the liquid level relay through wires.

8. The liquid level control device according to claim 6, characterized in that: The first electrode rod, the second electrode rod and the third electrode rod are respectively connected to three liquid level relays through wires.

9. The liquid level control device according to claim 6, characterized in that: The connection terminals at the top ends of the first electrode rod, the second electrode rod and the third electrode rod are respectively connected to the liquid level relays through wires.

10. The liquid level control device according to claim 6, characterized in that: The connection rings at the top ends of the first electrode rod, the second electrode rod and the third electrode rod are respectively connected to the liquid level relays through wires.

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