CN208458838U - Level electrode protective device - Google Patents

Abstract

The utility model discloses a kind of level electrode protective devices in boiler protection device field; including terminal box, the adapter tube being connect with terminal box, level electrode bar and tube socket; level electrode bar upper end is fixed in adapter tube and there are connector lugs in terminal box; adapter tube lower end is equipped with outer silk head and is fastened in flange blind cover by sealing taper pipe thread; it is equipped with SW with outside ring between flange blind cover and tube socket and is fixedly connected by fastener; tube socket lower end is welded and fixed with boiler upper surface, and level electrode bar lower end passes through tube socket and protrudes into boiler internal.The level electrode protective device of the utility model is detected for boiler water level, can be guaranteed that each junction sealing is tight, be prevented the leakage of high temperature and high pressure steam from causing safety accident.

Description

Level electrode protective device

Technical field

The utility model relates to a kind of boiler protection device, in particular to the level electrode protective device of a kind of boiler.

Background technique

Level electrode is the main tool for detecting height of water level in the containers such as boiler.On the level electrode of the prior art End is connect by terminal box with boiler electrical control system, and the inside of container is protruded into level electrode lower end, for perceiving in container The height situation of water level, and electric signal is passed into boiler electrical control system.Between level electrode and container by sleeve into Row is threadedly coupled.The level electrode of the structure has the drawback that: usually used level electrode due in pressure, temperature and Humidity is relatively high and the environment of long-term hot and cold alternation in, it may appear that serious steam leakage situation.Between sleeve and container After screw thread is by corrosion, oxidation, steam under the effect of the pressure can the screw thread of sleeve and container leak out, the steam of leakage is overflow everywhere It overflows, great security risk is caused to the operation of the containers such as boiler.

Utility model content

The purpose of the utility model is to provide a kind of level electrodes that can be avoided steam leakage, improve boiler safety performance Protective device.

Purpose of the utility model is realized as follows: a kind of level electrode protective device, including terminal box and terminal box Adapter tube, level electrode bar and the tube socket of connection, level electrode bar upper end are fixed in adapter tube and in terminal box there are connector lug, Adapter tube lower end is equipped with outer silk head and is fastened in flange blind cover by sealing taper pipe thread, is equipped between flange blind cover and tube socket SW with outside ring is simultaneously fixedly connected by fastener, and tube socket lower end is welded and fixed with boiler upper surface, level electrode bar lower end Boiler internal is protruded into across tube socket.

The level electrode protective device of the utility model is detected for boiler water level, can guarantee that each junction sealing is tight It is close, prevent the leakage of high temperature and high pressure steam from causing safety accident.

To further increase sealing effect, prevents steam from revealing from the sealing taper pipe thread of adapter tube, set on outer silk head There is thin hex nut, the thin hex nut is located above the flange blind cover, and the thin hex nut and the method tritonope Gasket is equipped between lid.

To prevent pot water corrosion water level electrode stem not up to standard or being unable to accurate response waterlevel data after generating scale, water level electricity Pole bar outer wall set is covered with polytetrafluoroethylene (PTFE) protective case, and polytetrafluoroethylene (PTFE) protective case energy high temperature resistant has the corrosion-resistant, longevity to 250 DEG C Life grow, do not adhere to, nonhazardous the advantages that, can ensure that level electrode bar use quality.

In order to which every water level to boiler carries out accurate perception to control, so that boiler operatiopn is safer efficiently, water Position electrode stem includes lower limit level electrode bar, upper limit level electrode bar and control level electrode bar.

To make coordination electrode bar that there is induction level, having both and open the function such as pump, termination of pumping, low-water alarm, high water-level alarm Can, control level electrode bar uses condenser type level electrode bar.Electricity caused by condenser type level electrode bar is changed by liquid Hold variation, the increase of liquid level will be such that output increase accordingly.Capacitor is measured by preamplifier and is converted to direct current signal and is sent to Controller or transmitter, items control and switch value are set in the controller.

For prevent level electrode bar in longer situation due to deformation by taking, fixation hole is equipped in the middle part of level electrode bar Plate, corresponding lower limit level electrode, upper limit level electrode and control level electrode bar pass through position and are equipped with aperture in fixed orifice plate The circular hole matched positions level electrode bar in fixed orifice plate.

Detailed description of the invention

Fig. 1 is the schematic diagram of the level electrode protective device structure of the utility model.

Wherein, 1 terminal box, 2 take over, 3 thin hex nuts, 4 flange blind covers, 5 tube sockets, 6 thin hex nuts, restrict water supply under 601 Position electrode stem, 602 upper limit level electrode bars, 603 control level electrode bars, 7 SW with outside ring, 8 bolts, 9 boilers, 10 is fixed Orifice plate.

Specific embodiment

Level electrode protective device as shown in Figure 1, including terminal box 1, the adapter tube being connect with terminal box 12, level electrode Bar and tube socket 5.Three level electrode bar upper ends are fixed in adapter tube 2 and in terminal box 1 there are connector lug, handle after wiring is powered Liquid level warning and control and liquid level output signal are sent to the boiler electrical control system of client.2 lower end band of adapter tube is by R1 (1/4) Outer silk head seals screw threads for fastening in flange blind cover 4 by R1 (1/4), by thin hex nut 3 and gasket R1 (1/4) silk Head junction is again sealed off, and is then mounted as a whole on tube socket 5, passes through SW with outside ring 7 between flange blind cover 4 and tube socket 5 It is fastenedly connected with 4 M16 bolts 8, guarantees that each junction sealing is tight, prevent the leakage of high temperature and high pressure steam from causing safe thing Therefore.5 lower end of tube socket is welded and fixed with 9 upper surface of boiler, and level electrode bar lower end passes through tube socket 5 and protrudes into inside boiler 9.To prevent It is unable to accurate response waterlevel data after pot water corrosion water level electrode stem not up to standard or generation scale, level electrode bar outer wall set is covered with Polytetrafluoroethylene (PTFE) protective case.For prevent level electrode bar in longer situation due to deformation by taking, set in the middle part of level electrode bar There is fixed orifice plate 10, corresponding three level electrode bars pass through position and are equipped with the matched circular hole in aperture in fixed orifice plate 10, make water level Electrode stem is positioned in fixed orifice plate 10.

In the present embodiment, three level electrode bars are respectively lower limit level electrode bar 601, upper limit level electrode bar 602 With control level electrode bar 603.Lower limit level electrode bar 601 and upper limit level electrode bar 602 are respectively used to induction minimum safe Water level and highest safety level.

When water level in the boiler reaches lowest safe waterline, electric signal can be passed to boiler by lower limit level electrode bar 601 Electrical control system, boiler electrical control system can feed back to again electric signal burner and boiler feed pump, realize that interlocking stops Furnace and open pump；When water level in the boiler reaches highest safety level, electric signal can be passed to boiler by upper limit level electrode bar 602 Electrical control system, boiler electrical control system can feed back to again electric signal boiler feed pump, realize interlocking termination of pumping.Control water Position electrode stem 603 is for perceiving multiple liquid levels, and feedback signal carries out opening pump, termination of pumping, low water level to boiler electrical control system Alarm, high water level report, minimum safe low water level and interlocking blowing out, highest safety level blowing out etc..Control level electrode bar 603 is adopted With condenser type level electrode bar.The increase of capacitance variations caused by condenser type level electrode bar is changed by liquid, liquid level will It increase accordingly output.Capacitor, which is measured by preamplifier and is converted to direct current signal, is sent to controller or transmitter, every Control and switch value are set in the controller.When water level in the boiler reaches every water level value, condenser type water level induced electricity pole bar Electric signal is passed into boiler electrical control system, boiler electrical control system can feed back to again electric signal its corresponding pot Furnace feed pump or burner realize start and stop pump, the functions such as high-low water alarm.

After the boiler erection level electrode protective device, every water level of boiler is precisely controlled, and realizes liquid level The double control of display, alarm and interlocking blowing out, and can guarantee that each junction sealing is tight, prevent letting out for high temperature and high pressure steam Dew causes safety accident, so that boiler operatiopn is safer efficiently.

The utility model is not limited to above-described embodiment, on the basis of technical solution disclosed by the utility model, this For the technical staff in field according to disclosed technology contents, not needing creative labor can be special to some of which technology Sign makes some replacements and deformation, these replacements and deformation are within the protection scope of the present utility model.

Claims (6)

1. a kind of level electrode protective device, including terminal box, the adapter tube being connect with terminal box, level electrode bar and tube socket, Be characterized in that: level electrode bar upper end is fixed in the adapter tube and there are connector lugs in the terminal box, described to connect Pipe lower end is equipped with outer silk head and is fastened in flange blind cover by sealing taper pipe thread, the flange blind cover and the tube socket it Between be equipped with and SW with outside ring and be fixedly connected by fastener, the tube socket lower end is welded and fixed with boiler upper surface, described Level electrode bar lower end passes through the tube socket and protrudes into the boiler internal.

2. level electrode protective device according to claim 1, it is characterised in that: the outer silk head is equipped with thin hexagonal spiral shell Mother, the thin hex nut is located above the flange blind cover, and is equipped between the thin hex nut and the flange blind cover Gasket.

3. level electrode protective device according to claim 1, it is characterised in that: the level electrode bar outer wall set is covered with Polytetrafluoroethylene (PTFE) protective case.

4. level electrode protective device according to claim 1, it is characterised in that: the level electrode bar is restricted water supply under including Position electrode, upper limit level electrode and control level electrode bar.

5. level electrode protective device according to claim 4, it is characterised in that: the control level electrode bar is using electricity Appearance formula level electrode bar.

6. level electrode protective device according to claim 4, it is characterised in that: be equipped in the middle part of the level electrode bar solid Determine orifice plate, the lower limit level electrode bar, upper limit level electrode bar and control level electrode bar are corresponded in the fixed orifice plate and is worn Position is crossed equipped with the matched circular hole in aperture.