CN206904320U - For the safety valve of ash to be put under the serious dust stratification state of dust collector ash hopper automatically - Google Patents

Abstract

The utility model provides a kind of safety valve for being used under the serious dust stratification state of dust collector ash hopper put ash automatically, is installed on a dust leg road, and the dust leg road, which has, stretches into an a pipeful of ash inlet tube in portion in vivo and the ash releasing tube stretched out outside bucket body；There is the bucket body design to carry material position and high charge level early warning material position；The ash inlet tube is carried between material position and high charge level early warning material position positioned at the design；The safety valve includes：It is fixedly arranged on a detection mouth flange of the mouth of pipe of ash releasing tube；An elastic pressure assembly affixed with the detection mouth flange；One door rod, its one end are connected to close a bonnet of the mouth of pipe, and the other end is connected with the elastic pressure assembly.Dust leg road can be coordinated easily to judge that dust collector ash hopper is to be in normal condition or abnormality.And can be after grey bearing capacity be stored up beyond deduster design, dust is higher by after normal storage ash quantity in ash bucket, dust stratification is achieved in the defencive function to deduster with automatic removing dust.

Description

For the safety valve of ash to be put under the serious dust stratification state of dust collector ash hopper automatically

Technical field

It the utility model is related to environmental technology field, more particularly to cleaner, and in particular to one kind is used for deduster ash Automatically the safety valve of ash is put under the serious dust stratification state that struggles against.

Background technology

Showing for the of short duration dust stratification of ash bucket occurs often because of ash discharge failure in the dust collector ash hopper that thermal power plant is equipped with often As, this belongs to normal phenomenon, as long as the storage ash capacity that general dust stratification allows in dust collector ash hopper, and dust stratification duration is corresponding extensive In the time range of multiple normal ash disposal, deduster would not be damaged.Therefore dust collector ash hopper dust stratification causes to endanger to deduster Harmful case, it is entirely because failture evacuation not in time, makes dust stratification inside dust collector ash hopper exceed deduster design permission Storage capacity.

It is domestic that the security incident caused by the serious dust stratification of dust collector ash hopper repeatedly occurs.Such as：Hubei Pu in 2005 No. 2 electric cleaner " 1.1 " total collapse accidents of boundary Power Plant No.1 unit (300,000 kilowatts)；The second thermoelectricity of the packet header of the Inner Mongol in 2005 Electric field " 3.20 " the ash bucket total collapse accident of factory No. 2 units (200,000 kilowatts) electric cleaner one；Inner Mongol Huo Mei groups in 2005 No. 3 unit " 4.9 " ash bucket case accidents of one phase of power plant for self-supply of Hong Junlv electricity companies；The 2006 time international grey hair of Anhui Chizhou City nine of electricity Electric No. 2 unit electric cleaner " 3.14 " cave-in accidents of Co., Ltd；The safe and sound Iron And Steel Co., Ltd in Tangshan " 9.23 " electricity removes within 2014 Dirt device ash bucket cave-in accident etc..Above-mentioned its inducement of startling accident can all be attributed to the accident dust stratification of deduster and not and When deashing.

Domestic thermal power plant deduster judges whether the technological means of dust stratification mainly has three aspects for inside at present：Deduster ash The high charge level switch that struggles against judges；Deduster ash disposal system operational factor indirect discrimination；Measure checking is disassembled in maintenance.

The factor that ash disposal system operational factor indirect discrimination influences is a lot, and needs the comparison of longtime running parameter, has There is very big hysteresis quality, it is impossible to find dust stratification hidden danger in time.The feelings that measure checking often has occurred and that in accident are disassembled in maintenance Under condition, that takes has the interim measure of certain risk and damaging, is not the technical measures of equipment normal operation.So Mainly choose in the industry at present ash bucket high charge level switch judge measure judge inside deduster whether dust stratification.

Generally switched at this stage using high charge level and judge to coordinate artificial accident cinerary device serious inside deduster to handle Dust stratification failure, the premise of such a mode is will be using ash bucket high charge level switching signal as operation foundation, if high charge level switch letter Number go wrong, then this mode just can not normal work.In addition, when high charge level switching signal fails, not only can not and When process accident hidden danger, accident potential can not be judged whether in time by also resulting in staff, and this is also to cause domestic hair The key technology factor of the serious dust stratification accident of raw deduster.

As shown in figure 1, existing dust collector ash hopper when on ash bucket high charge level switch 01 alarm when, it is necessary to which ash bucket is opened manually The urgent cinerary device 02 of bottom accident, carries out urgent ash discharge, if carry out accident promptly puts ash and fully relies on high charge level switch 01 Single source signal.

In ash bucket high charge level switch type selecting, because radio frequency admittance material level indicator is relatively economical, reliable, therefore, general Time design selection using radio frequency admittance material level indicator.Theoretically, radio frequency admittance material level indicator uses in design Advanced anti-adhesive circuit, using the measurement of many reference amounts, wherein by using exchange phase demodulation sampler, solved from mathematical theory Bridging problem on switch.But in dust collector ash hopper in adverse circumstances, radio frequency admittance material level indicator still goes out unavoidably Existing false alarm and damage, exactly because also false alarm takes place frequently radio frequency admittance material level indicator in actual applications, it is easy to operation Administrative staff produce the misleading in understanding.Needed in addition, radio frequency admittance level-sensing device is using preceding needing to debug, during debugging by having Grey and ashless two states, ability accurate calibration level-sensing device, so, in deduster ash disposal system existing defects, such as ash disposal When design conveying capacity deficiency, deduster air flow method are uneven, it will make very big wind in ash disposal system running be present Dangerous hidden danger.If deduster is run in the case where hidden danger be present for a long time, maintainer can not in time have found and exclude to ask again Topic, the long-term accumulation of problem, finally will result in serious harm.The country has many dedusters serious product occur going into operation in 1 year Grey failure, mainly caused by exactly above-mentioned reason.

With the constantly improve of passive nucleon material-level measure technological means, passive nuclear level sensing device has obtained more and more wider General use.But for passive nuclear level sensing device, equally there is also the possibility for breaking down and failing, in addition, passive nucleon Level-sensing device also without by the test and checking under the state of emergency, so, even if being led using passive nuclear level sensing device instead of radio frequency Stuff level switch of receiving can not avoid deduster that serious dust stratification harm occurs completely.

Thus, ash bucket dust stratification can be judged accurately, conveniently, reliably, in time by how realizing, and safe and simple, effective The serious dust stratification accident potential of processing deduster is the important topic of urgent need to resolve in the industry.

Utility model content

For above-mentioned the shortcomings of the prior art, the purpose of this utility model is to provide a kind of tight for dust collector ash hopper Automatically the safety valve of ash is put under weight dust stratification state, can be with detection mouth of the device in the lower end in a special dust leg road, Combined with Radiotherapy Grey pipeline easily judges that dust collector ash hopper is to be in normal condition or abnormality.And it can be designed beyond deduster After storing up grey bearing capacity, dust is higher by after normal storage ash quantity in ash bucket, dust stratification is achieved in automatic removing dust to dedusting The defencive function of device.

For the above-mentioned purpose, the utility model adopts the technical scheme that：

For putting the safety valve of ash under the serious dust stratification state of dust collector ash hopper automatically, a dust leg road is installed on, this puts ash Pipeline, which has, stretches into an a pipeful of ash inlet tube in portion in vivo and the ash releasing tube stretched out outside bucket body；There is the bucket body design to hold Material containing position and high charge level early warning material position；The ash inlet tube is carried between material position and high charge level early warning material position positioned at the design；

The safety valve includes：

It is fixedly arranged on a detection mouth flange of the mouth of pipe of ash releasing tube；

An elastic pressure assembly affixed with the detection mouth flange；

One door rod, to close a bonnet of the mouth of pipe, the other end connects with the elastic pressure assembly for its one end connection Connect.

Further, the elastic pressure assembly includes a spring support and a spring；

The spring support includes a bonnet and connects some installation vertical rods of bonnet and detection mouth flange；The bonnet with A fixed guiding and limiting plate between detection mouth flange；It is oriented to and limiting plate is formed with a pilot hole, the door rod has one the One retainer, the door rod pass through the pilot hole, and first retainer is between guiding and limiting plate and bonnet；Cap-shaped afterwards The retainers of Cheng Youyi second；The spring housing is located at door rod, and both ends are stopped at foregoing first retainer and the second stop respectively Portion.

Further, the bonnet, detection mouth flange, guiding and limiting plate are parallel between each other.

Further, second retainer is that an adjustment is enclosed, and the adjustment snare is located at the door rod, and outside passes through spiral shell Line structure is connected with the mounting hole that bonnet is formed, and has been internally formed spring locking groove.

Further, the spring is stage clip.

Further, first retainer is an annular protrusion.

Further, the door rod, pilot hole and mounting hole are coaxial.

By taking above-mentioned technical proposal, ash inlet tube is highly less than ash bucket design carrying material position, i.e., grey position limiting altitude, height In high charge level early warning material position, i.e. high charge level switch height.It is under normal circumstances, high after dust stratification first reaches high charge level switch height Stuff level switch is alarmed, at this point it is possible to pass through conventional meanses ash discharge.Once high charge level switch fault, failing to alarm, grey position continues to rise Height, the nozzle position of ash inlet tube is reached, in the presence of dust stratification tension force, you can discharge dust stratification by dust leg road.

In this way, safety valve of the present utility model is with a unification pipeline structure, but can play very reliable fault exclude and Forewarning function, greatly improve the safety and stability of ash bucket, and low cost, can't additionally increase excessive load, avoid because Excessive overweight failture evacuation element is added, increases existing equipment loading effect equipment normal operation.It is in addition, of the present utility model The ash discharge pre-alarming system that ash bucket is formed has high stability in itself, is not in failure substantially, and because its working condition It is capable of the inspection of simplicity, therefore the possibility of failure by periodic inspection, can be eliminated.

Brief description of the drawings

Fig. 1 is the structural representation of existing dust collector ash hopper in background technology.

Fig. 2 is the structural representation of ash bucket in the embodiment of the utility model one.

Fig. 3 is the installation direction schematic diagram of the ash inlet tube of ash bucket in the embodiment of the utility model one.

Fig. 4 is the structural representation of ash releasing tube and safety valve in the embodiment of the utility model one.

Fig. 5 is the main structure figure of bonnet in safety valve in the embodiment of the utility model one.

Fig. 6 is the side block diagram of bonnet in safety valve in the embodiment of the utility model one.

Fig. 7 is the structural representation for installing vertical rod in the embodiment of the utility model one in safety valve.

Fig. 8 is the structural representation of door rod in safety valve in the embodiment of the utility model one.

Fig. 9 is the sectional structure chart for adjusting circle in the embodiment of the utility model one in safety valve.

Figure 10 is the main structure figure for adjusting circle in the embodiment of the utility model one in safety valve.

Figure 11 is the side block diagram of bonnet in safety valve in the embodiment of the utility model one.

Figure 12 is the main structure figure of bonnet in safety valve in the embodiment of the utility model one.

Figure 13 is the side block diagram of guiding and limiting plate in safety valve in the embodiment of the utility model one.

Figure 14 is guiding in safety valve in the embodiment of the utility model one and the main structure figure of limiting plate.

Embodiment

Illustrate operation principle of the present utility model first：

Dust collector ash hopper has characteristic as follows by its structure and working environment：Be first deduster in operation, such as ash bucket Can be in negative pressure state when belonging to ashless empty bucket-shaped state, inside ash bucket, this also imply that now if open ash bucket with outside The hole that portion's air is connected, extraneous air can be entered inside ash bucket under suction function by hole.Next to that dust collector ash hopper During in dust stratification state, because the mobility of ash is larger, there are certain fluid properties, grey tension force promotes grey from ash bucket and outer What the hole that portion's air is connected outwards sprayed, and ash accumulation more than hole is higher, and grey injection power is also bigger.

Using the characteristic of above-mentioned dust collector ash hopper, highly exceed normal storage in the mouth of pipe of one ash inlet tube of ash bucket indoor design The dust leg road of grey height, when dust accretions highly exceed the mouth of pipe height of dust leg road ash inlet tube, dust can pass through import The mouth of pipe of pipe automatically flows into dust leg road, with piling height increase grey in dust leg road, by the accumulation pressure of ash, bonnet Promote door rod to open bonnet, start automatic removing dust.After dust stratification is disposed in ash bucket, by the thrust and ash bucket of spring The suction of interior negative pressure can be such that bonnet closes automatically.Thus it can be achieved to alleviate dust stratification situation and extend the function of processing time, have Removed a hidden danger beneficial to urgent artificial ash discharge is taken.

As described above, normal ash bucket storage ash is that deduster runs necessary function, but the deduster of improper storage ash is serious Dust stratification is the accident for needing to take precautions against, therefore, when ash bucket storage ash reaches the grey condition of improper storage, grey storing highly in ash bucket (ash position height), typically designer carry out load, the design input condition of structure design, utilize the side of this design input Boundary's condition, high grey position ash exhauster is set on ash bucket.The utility model is improved on basis herein.Below in conjunction with this Accompanying drawing in utility model embodiment, clear, complete description is carried out to the technical scheme in the embodiment of the utility model.

As shown in Fig. 2 ash bucket in one embodiment, including：

Bucket body 1, has ash bucket design carrying material position and high charge level early warning material position, and the two material positions are all known design ginsengs Number, each ash bucket can determine the two material positions during redesigning, then arrange corresponding device；

Dust leg road 2, there is the ash releasing tube 22 for stretching into the ash inlet tube 21 inside bucket body and stretching out outside bucket body；Dust leg leads to 2 can be fixedly arranged on bucket body 1 by flange arrangement, can also be fixedly arranged on bucket body for example, by the mode of welding.

Wherein, ash inlet tube 21 is located between ash bucket design carrying material position and high charge level early warning material position；The mouth of pipe of ash releasing tube 22 Closed by safety valve 3.The mouth of pipe height ash bucket design carrying material position of ash inlet tube, dust stratification first reaches high charge level switch height, high Material position is alarmed, if high charge level switch fault, grey position continues to raise, and reaches ash inlet tube position, has foregoing operation principle to understand, Dust stratification can be discharged by dust leg road, and in discharge process, the mouth of pipe of the ash releasing tube by safe valve closure is opened on top.In addition, ash releasing tube Airborne dust is lowered in major requirement as far as possible, while away from the appropriate height in ground, is easy to observe, overhaul and ship ash.

Ash releasing tube can use horizontally disposed mode as shown in the figure, in a further embodiment, can also use and level Direction forms 0 ° of downward mode to 30 ° of angles and arranged, dust stratification is discharged simultaneously by deadweight.

As shown in figure 4, this application claims safety valve specifically include：

It is fixedly arranged on the detection mouth flange 31 of the mouth of pipe of ash releasing tube 22；

The affixed elastic pressure assembly with detection mouth flange 31；

Door rod 34, its one end are connected to close the bonnet 31 of the mouth of pipe, and the other end is connected with elastic pressure assembly.

Specifically, elastic pressure assembly includes spring support and spring 33；

Spring support includes bonnet 35 and connects some installation vertical rods 37 of bonnet 35 and detection mouth flange 31；Bonnet 35 with Fixed guiding and limiting plate 36 between detection mouth flange 31；It is oriented to and limiting plate 36 has one formed with a pilot hole, door rod 34 First retainer, door rod 34 pass through the pilot hole, and the first retainer is between guiding and limiting plate 36 and bonnet 35；Bonnet 35 Formed with one second retainer；Spring 33 is sheathed on door rod 34, and both ends are stopped at foregoing first retainer and second stopped respectively Dynamic portion.

As figure, bonnet 35, detection mouth flange 31, guiding and limiting plate 36 are parallel between each other.

Second retainer is preferably to adjust circle 39, and adjustment circle 39 is sheathed on door rod 34, and outside passes through helicitic texture and bonnet 35 mounting holes formed screw connection, have been internally formed spring locking groove.Adjustment circle 39 can adjust the pressure of spring 33 by rotating Contracting degree, thus adjust force of the door rod 34 to bonnet 31.

Wherein, spring is stage clip.First retainer is an annular protrusion.Door rod, pilot hole and mounting hole are coaxial.

In order that those skilled in the art become apparent from understanding the concrete structure of safety valve in the present embodiment, pass through Fig. 5 to figure 14 pairs of each parts are illustrated.

In addition, with reference to figure 3, the mouth of pipe direction of ash inlet tube is backwards to the direction that ash bucket inside smoke flows；The mouth of pipe of ash inlet tube For downward inclined tube mouth.It can thus prevent the mouth of pipe of ash inlet tube from causing coal ash directly because air-flow enters ash in face of flue gas Pipe, angle be downwards in order to prevent deduster fall ash fall directly into ash inlet tube, can be to greatest extent by this structure design Ground allows ash accumulation to flow into ash inlet tube after getting up, and avoiding dust stratification height from not yet reaching high charge level switch alarm height has grey entrance Ash inlet tube.

It is very big one due in deduster steel construction load with reference to the structure described by above-described embodiment and relevant drawings Divide is to design the storage ash load under the conditions of grey position limiting altitude.The mouth of pipe of ash inlet tube is highly less than grey position limiting altitude, and it is located at Between high charge level switch height and grey position limiting altitude.Process is first to reach high charge level switch height, high charge level alarm, if high Stuff level switch failure, grey position continue to raise, and reach ash inlet, and device ash discharge is simultaneously alarmed, if still exclude not in time, then ash Position will reach and exceed the given grey position limiting altitude of design, will now overload, accident just occurs.

When high charge level switch is not reaching in normal condition ash bucket ash position, by pulling door rod to drive bonnet to make inside ash bucket It is in communication with the outside by dust leg road, can substantially observes that extraneous air to the air draught of ash bucket inside, now may determine that ash bucket It is internal normal.When dust stratification exceedes the limiting altitude for normally storing up grey height, ash meeting nature is flowed into dust leg road, with dust Accumulation, promote bonnet open, put grey function automatically under the serious dust stratification state of deduster so as to realize.

In the state of bonnet does not automatically turn on, Daily Round Check can check ash bucket inner product ash shape taking human as door rod is pulled State, such as extraneous air because suction function is the air-breathing into ash bucket, then it may determine that the grey state of storage is normal inside ash bucket.

Obviously, described embodiment is only the utility model part of the embodiment, rather than whole embodiments.It is based on Embodiment in the utility model, those of ordinary skill in the art are obtained all under the premise of creative work is not made Other embodiment, belong to the scope of the utility model protection.

Claims (7)

1. the safety valve for putting ash under the serious dust stratification state of dust collector ash hopper automatically, is installed on a dust leg road, the dust leg Road, which has, stretches into an a pipeful of ash inlet tube in portion in vivo and the ash releasing tube stretched out outside bucket body；There is the bucket body design to carry Material position and high charge level early warning material position；The ash inlet tube is carried between material position and high charge level early warning material position positioned at the design；

It is characterised in that it includes：

It is fixedly arranged on a detection mouth flange of the mouth of pipe of ash releasing tube；

An elastic pressure assembly affixed with the detection mouth flange；

One door rod, its one end are connected to close a bonnet of the mouth of pipe, and the other end is connected with the elastic pressure assembly.

2. being used under the serious dust stratification state of dust collector ash hopper the safety valve for putting ash automatically as claimed in claim 1, its feature exists In the elastic pressure assembly includes a spring support and a spring；

The spring support includes a bonnet and connects some installation vertical rods of bonnet and detection mouth flange；The bonnet and detection A fixed guiding and limiting plate between mouth flange；It is oriented to and limiting plate is formed with a pilot hole, the door rod has one first to stop Dynamic portion, the door rod pass through the pilot hole, and first retainer is between guiding and limiting plate and bonnet；Bonnet formed with One second retainer；The spring housing is located at door rod, and both ends are stopped at foregoing first retainer and the second retainer respectively.

3. being used under the serious dust stratification state of dust collector ash hopper the safety valve for putting ash automatically as claimed in claim 2, its feature exists In the bonnet, detection mouth flange, guiding and limiting plate are parallel between each other.

4. being used under the serious dust stratification state of dust collector ash hopper the safety valve for putting ash automatically as claimed in claim 2, its feature exists In second retainer is that an adjustment is enclosed, and the adjustment snare is located at the door rod, and outside passes through helicitic texture and rear cap-shaped Into a mounting hole connection, be internally formed spring locking groove.

5. being used under the serious dust stratification state of dust collector ash hopper the safety valve for putting ash automatically as claimed in claim 2, its feature exists In the spring is stage clip.

6. being used under the serious dust stratification state of dust collector ash hopper the safety valve for putting ash automatically as claimed in claim 2, its feature exists In first retainer is an annular protrusion.

7. being used under the serious dust stratification state of dust collector ash hopper the safety valve for putting ash automatically as claimed in claim 2, its feature exists In the door rod, pilot hole and mounting hole are coaxial.