CN201233539Y

CN201233539Y - Water level switch sensor

Info

Publication number: CN201233539Y
Application number: CNU2008200952813U
Authority: CN
Inventors: 陈如亮
Original assignee: SHENZHEN POWERWORLD MACHINERY EQUIPMENT CO Ltd
Current assignee: Shenzhen Power World New Energy Technology Co., Ltd.
Priority date: 2008-07-02
Filing date: 2008-07-02
Publication date: 2009-05-06
Anticipated expiration: 2018-07-02

Abstract

The utility model relates to a water-level switch sensor, which comprises probes arranged at different heights of a water tank. The water tank comprises an inner conductive wall; the probes comprise insulating nuts with axial openings; the insulating nuts are closely matched with tank holes at the different heights of the water tank; the probes further comprise corrosion-resistant metal bolts and screw caps, wherein the metal bolts are closely matched with axial openings of the insulating bolts; and the inner section of the metal bolts are positioned in the water tank, while the outer section of the bolts and the screw caps are arranged outside the water tank. The water-level switch sensor has the following advantages: the water-level sensing is accurate and reliable, the electrochemical corrosion between the probes and connection points on conductive wires can be completely eliminated, the scaling failure period is greatly deferred, the service life of the sensor and the probes is greatly prolonged, the cost is low, and the installation is simple and convenient.

Description

The water level switch sensor

Technical field

The utility model relates to a kind of device for controlling water level, and more particularly, the utility model relates to the device for controlling water level of a kind of heat pump and hot-water heating system.

Background technology

At present, the traditional water bit switch that uses on the market generally adopts electronic liquid level controller, it comprises that three leads probe irony or stainless steel that directly plays puts in water tank the inside: wherein one is the low-water level probe, and other one is the high water stage probe, and the 3rd is the common port probe.During installation, the common port probe hangs the most beneath of water tank, and the low-water level probe is placed on the lower limit liquid level, and the high water stage probe is placed on upper limit liquid level place; Probe by different liquid levels touches conducting electric signal behind the water, transmits the water level signal of sensing to water level switch.

Tradition probe is gone up the normally common electric wire of lead that connects, and also has in order to prevent that thunder and lightning from disturbing, electromagnetic interference (EMI), and adopts shielded conductor.

But there is following defective in conventional art: owing to be that lead and probe and contact position thereof all are hung in inside the water tank wet environment, if adopt the lead of common material, its non-refractory, steep in water for a long time, also be easy to occur corrosion at lead and the tight contact position of probe, not only influence water quality, and be easy to generate corrosion and breaking releasing, catastrophic failures such as water level is out of control occur.Take special lead if consider anti-interference, though price is very expensive, but because the galvanic corrosion at different metal materials linkage interface place exists all the time between lead and the probe, add under the environment of high temperature, high humidity and use, still can tie the full water dirt between time one probe of a specified duration and lead and the contact thereof, still common fault can occur, thereby also can only delay inaction interval limitedly and can not stop fault substantially.

Summary of the invention

Above-mentioned shortcoming at prior art, the purpose of this utility model is that a kind of water level switch sensor will be provided, this water level switch sensor has following advantage: level sensor accurately and reliably, and can eliminate the galvanic corrosion between probe and the wire joining fully, delay the fouling exhaustion run greatly, greatly improve the serviceable life of sensor and probe thereof, and with low cost, installation simple and convenient.

For this reason, technical solution of the present utility model is a kind of water level switch sensor, and it comprises the probe that is located at the water tank differing heights, and described water tank comprises the inwall of conduction; Described probe comprises the insulation nut of tape spool to perforate, this insulation nut fits snugly in the case hole of described water tank differing heights, described probe also comprises corrosion resistant metal bolt and nut, this metal bolts fits snugly in the axial aperture of described insulation nut, and the inner segment of described metal bolts is among the described water tank and its bolt outer end and nut are located at outside the water tank.

Water level switch sensor of the present utility model, the corrosion resistant metal bolt that adopts uniform material is as the probe electric conductor, adopt the insulation nut as the waterproof transition structure inside and outside the metal bolts perforation water tank of uniform material simultaneously, the sealing property that can keep water tank, can make the electrically conductive signal of metal bolts inner segment in water tank conducted inside water again, outer end and nut are transferred to water level switch in the water tank outside with the water level electrically conductive signal, whole probe metal is same metal material, thoroughly eliminated in the water tank wet environment different serious galvanic corrosion that produce of metal material between probe and the wire joining down.And owing to adopt metal bolts that surface area/diameter all heightens as sensor probe, so can pop one's head in than tradition/lead has bigger conductive area and contact area, the induction of signal accuracy of water level conduction increases, reliability strengthens, and delay fouling exhaustion run, the serviceable life of greatly improving sensor and probe thereof greatly; Simultaneously, the helicitic texture of insulation nut and metal bolts makes that also installation can be simpler and easy, convenient, and cost, installation cost are all very cheap.

The utility model also comprises following concrete improvement:

In order to make full use of water tank metal wall as the conduction common return, described sensor comprises and is located at described water tank low level, high-order probe respectively and directly is connected public conductive contact on the water tank conductive inner wall that described corrosion resistant metal mainly comprises copper.

Be to realize the complete circuit and the robotization control of water level switch, each probe on the described water tank is realized being electrically connected with the circuit of described water level switch by its corrosion resistant metal bolt and nut.Described water level switch comprises the moisturizing solenoid valve that is subjected to its control.

Produce the short-circuit signal interference in order to prevent that the globule of condensation flows down with the metal bolts conducting on the tank inner wall; be the further unlikely influence that is subjected to the too fast erosion of high-temperature-hot-water, fouling of protection probe metal bolts simultaneously; thereby increase the mission life of probe metal bolts more; described probe also comprises insulating sleeve, and this insulating sleeve is closely overlayed on allows the end portion of metal bolts exposed outside it on the most surfaces of described metal bolts inner segment.Described insulating sleeve is thermal shrinkage type plastic casing or silicone rubber sleeve or glass fibre sleeve.Plastic casing can adopt inexpensive reliable PVC material.Also can adopt the PTFE heat-shrinkable tube to be coated on the brass bolt to increase grease proofing, acid and alkali-resistance, Corrosion Protection.

For further improving tank seal degree and reliability, described insulation nut is that plastic cement material is made.Be filled with fluid sealant between described insulation nut and the described case hole.Be filled with fluid sealant between the axial aperture of described metal bolts and described insulation nut.

For the further unlikely influence that is subjected to the too fast erosion of high-temperature-hot-water, fouling of the public conductive contact of protection; thereby increase the mission life of public conductive contact more, the tie point of the conductive inner wall of described public conductive contact and water tank is on the export-oriented surface of this conductive inner wall.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Description of drawings

Fig. 1 is the structural representation of traditional water bit switch sensor.

Fig. 2 is the structural representation of the utility model sensor embodiment.

Such as Fig. 1, be depicted as the structural representation of traditional water level switch sensor. The tradition water level switch comprises Article three, the lead C probe 10 irony or stainless steel that directly plays puts in water tank 20 the insides: wherein , the lead C low water level probe 10L that plays, the other high water level probe 10H that plays, the 3rd is played Common port probe 10S. During installation, common port probe 10S hangs the most beneath of water tank 20, and low water level is visited 10L is placed on the lower limit liquid level, and high water level probe 10H is placed on upper limit liquid level place; Spy by different liquid levels Head touches electric conduction signal behind the water, transmits the water level signal of sensing, water level switch to water level switch K K comprises the moisturizing magnetic valve F that is subjected to its control.

But there is following defective in conventional art: owing to be directly lead C and probe 10 and contact position thereof All be hung in water tank 20 the insides, because its non-refractory steeps for a long time in water, corrosion also can occur, not only shadow The catastrophe failures such as water level is out of control appear in Xiangshui County's matter, and produce easily corrosion and breaking releasing.

Embodiment

As Fig. 2,3, be depicted as the structural representation of the utility model water level switch sensor and probe embodiments thereof.Sensor comprises the probe 10L that is located at water tank 20 low levels, high-order probe 10H and directly is connected public conductive contact 30 on water tank 20 conductive inner wall.Described probe 10 comprises the insulation nut 11 of tape spool to perforate, and the insulation nut 11 that this PVC plastic cement material is made fits snugly in the case hole of described water tank 20 differing heights, is filled with the fluid sealant (not shown) between described insulation nut 11 and the described case hole.Described probe 10 also comprises copper bolt 12 and nut 13, and this copper bolt 12 fits snugly in the axial aperture of described insulation nut 11, is filled with the fluid sealant (not shown) between the axial aperture of described copper bolt 12 and described insulation nut 11.The inner segment of described copper bolt 12 is among the described water tank 20 and its bolt 12 outer ends and nut 13 are located at outside the water tank 20.Described public conductive contact 30 is surperficial in the extroversion of this conductive inner wall with the tie point of the conductive inner wall of water tank 20.Described probe 10 also comprises the thermal shrinkage type plastic insulation sleeve pipe 14 of PVC material, and this insulating sleeve 14 is closely overlayed on allows the end portion of copper bolt 12 exposed outside it on the most surfaces of described copper bolt 12 inner segments.

Each

probe

10L, 10H on the described water tank 20 realize being electrically connected with the circuit of the water level switch K (referring to Fig. 1) that comprises moisturizing solenoid valve F by its copper bolt 12 and nut 13.

Claims

1, a kind of water level switch sensor, it comprises the probe that is located at the water tank differing heights, it is characterized in that: described water tank comprises the inwall of conduction; Described probe comprises the insulation nut of tape spool to perforate, this insulation nut fits snugly in the case hole of described water tank differing heights, described probe also comprises corrosion resistant metal bolt and nut, this metal bolts fits snugly in the axial aperture of described insulation nut, and the inner segment of described metal bolts is among the described water tank and its bolt outer end and nut are located at outside the water tank.

2, water level switch sensor as claimed in claim 1, it is characterized in that: described sensor comprises and is located at described water tank low level, high-order probe respectively and directly is connected public conductive contact on the water tank conductive inner wall that described corrosion resistant metal mainly comprises copper.

3, water level switch sensor as claimed in claim 1 or 2 is characterized in that: each probe on the described water tank is realized being electrically connected with the circuit of described water level switch by its corrosion resistant metal bolt and nut.

4, water level switch sensor as claimed in claim 1 or 2, it is characterized in that: described probe also comprises insulating sleeve, this insulating sleeve is closely overlayed on allows the end portion of metal bolts exposed outside it on the most surfaces of described metal bolts inner segment.

5, water level switch sensor as claimed in claim 4 is characterized in that: described insulating sleeve is thermal shrinkage type plastic casing or silicone rubber sleeve or glass fibre sleeve.

6, as claim 1 or the 2 water level switch sensors of stating, it is characterized in that: described insulation nut is that plastic cement material is made.

7, water level switch sensor as claimed in claim 1 or 2 is characterized in that: be filled with fluid sealant between described insulation nut and the described case hole.

8, water level switch sensor as claimed in claim 1 or 2 is characterized in that: be filled with fluid sealant between the axial aperture of described metal bolts and described insulation nut.

9, water level switch sensor as claimed in claim 2 is characterized in that: the tie point of the conductive inner wall of described public conductive contact and water tank is on the export-oriented surface of this conductive inner wall.

10, water level switch sensor as claimed in claim 1 or 2 is characterized in that: described water level switch comprises the moisturizing solenoid valve that is subjected to its control.