CN206168553U - Combined type choked flow device - Google Patents

Abstract

The utility model discloses a combined type choked flow device belongs to the sealed field of medium speed pulverizer frame. The utility model discloses a combined type choked flow device, including choked flow mechanism, choked flow mechanism installs on last connecting piece, and choked flow mechanism is located under the drive plate dynamic and static combination department of tang and last connecting piece, choked flow mechanism includes that the cross section is the block ring of "L shape ", and the medial surface cover of this block ring is on the lateral surface of last connecting piece, and the upward side of this block ring is just to tang under the drive plate of top. The utility model discloses fit clearance to between tang under the drive plate and the last connecting piece has carried out effective protection.

Description

A kind of combined type choke apparatus

Technical field

The utility model is related to medium-speed pulverizer support field of sealing technology, more specifically to a kind of combined type choked flow dress Put.

Background technology

In current China Thermal Power Generation Industry, medium-speed pulverizer is widely applied, and wherein ZGM types, MPS type medium-speed pulverizers are occupied Larger share.Medium-speed pulverizer is thermal power plant's heavy duty boiler unit pulverized coal preparation system common equipment, is the main of boiler controller system One of energy consumption equipment, its operation conditions is closely related with the economic benefit of power plant.The sealing gland that stone coal discharge causes in coal pulverizer Component wear and gas sealing system leakage are FAQs in medium-speed pulverizer running, and thus bring parts replacement with And the increase of maintenance of equipment expense, the operating cost of boiler controller system is substantially increased, have a strong impact on the economic benefit of power plant.

Meanwhile, the generally metal labyrinth seal of the support sealing use of existing medium-speed pulverizer.Metal labyrinth seal is Misunderstand each other sealing means, in operation due to the change of coal pulverizer operating mode and sealing blast, mill is inevitably produced between sound Wipe, coal pulverizer rotating shaft is damaged to a certain extent, sealing effectiveness reduction, the increase leaked out causes the further drop of sealing air blast It is low, form the leakage of coal dust.On the one hand leakage of pulverized coal causes reductor to be run under rugged environment, and substantial amounts of dust is filled into subtracting In fast machine, making oil quality deterioration, reduce the service life of coal pulverizer, and there is high-temperature hot-air causes the fire to cause device damage It is dangerous；On the other hand also environment in severe contamination factory.

For the weak point that above-mentioned metal labyrinth seal is present, propose in the prior art close in the support of medium-speed pulverizer Seal up and use carbon pressurizing, for example patent publication No.：The U of CN 203548914, publication date：On April 16th, 2014, innovation and creation It is entitled：A kind of inner seal structure of HP medium-speed pulverizers, this application case discloses a kind of interior sealing knot of HP medium-speed pulverizers Structure, the lower ring of ring, sealing middle ring and sealing, gapless radial floating sealing device tool in the sealing being respectively provided with upper, middle and lower There is the alignment pin that can be back and forth moved back and forth along the radial direction of coal pulverizer rotating shaft, alignment pin is connected with carbon dam by spring. The advantage of this application case is：It is high temperature resistant, wear-resisting and with self-lubricating property, coal pulverizer rotating shaft will not be made in the process of running Into abrasion, coal pulverizer overhaul frequency is greatly reduced, while convenient disassembly, shortens the overhaul duration.

Although there is above advantage using carbon pressurizing in the support sealing of medium-speed pulverizer, in actual applications not There is problems with can avoiding：Shaking when having deviation, operation due to the concentricity that drive plate in installation process is sealed with support The problems such as dynamic, cleaning pebble coal screeding device is damaged, sealing air blast is too low, seam is sealed with support under causing drive plate Fit clearance between the upper connector of housing is easily worn and torn, and change is big, and hot blast largely leaks, and substantial amounts of coal grain can be carried when serious. The thing followed is that the position that carbon dam is damaged, drive plate bottom and carbon dam coordinate groove, sealing blast occurs Maintain situations such as not living.If treatment will cause following influence not in time：(1) at carbon dam and under drive plate stop portion leakage Wind, leakage powder can cause that production scene is seriously polluted, and influence is carried out production strictly in line with rules and regulations；(2) sealing air forces down substantial amounts of heat when primary air pressure Wind leaks can directly jeopardize the safety of reductor and surrounding devices；(3) performance driving economy of coal pulverizer declines, unit power consumption of coal pulverizing index Substantially rise.

In sum, how to overcome in existing medium-speed pulverizer because between the cooperation under drive plate between seam and upper connector Gap is easily worn and torn and becomes variety of problems that is big and causing, is the technical problem of urgent need to resolve in the prior art.

Utility model content

1. the utility model technical problem to be solved

The purpose of this utility model is to overcome in existing medium-speed pulverizer because under drive plate between seam and upper connector Fit clearance easily wear and tear and become variety of problems that is big and causing, there is provided a kind of combined type choke apparatus, under drive plate only Fit clearance between mouth and upper connector has carried out effective protection.

2. technical scheme

To reach above-mentioned purpose, the technical scheme that the utility model is provided is：

Combined type choke apparatus of the present utility model, including choked flow mechanism, the choked flow mechanism are installed on upper connector, And the choked flow mechanism is located at the place of being association of activity and inertia of seam and upper connector under drive plate；

The choked flow mechanism includes that cross section is the block ring of " ┓ shapes ", and the medial surface of the block ring is enclosed within upper connector On lateral surface, the upper side of the block ring is just to seam under the drive plate of top.

Further improved as the utility model, the block ring is divided into multi-section circular arc, every section the two of circular arc End is extended with connecting rod, and corresponding two connecting rods are fastened on one by a connecting bolt on adjacent two sections of circular arcs Rise.

Further improved as the utility model, horizontal branch has been evenly distributed on the lateral surface of the upper connector Frame, is threaded with upward regulating bolt on each horizontal support, the block ring is against at the top of the regulating bolt Downside.

Further improved as the utility model, filler is machined with the medial surface and upper side of the block ring Airtight and watertight padding is filled with letter, described filler letter.

Further improved as the utility model, the airtight and watertight padding is graphite packing.

Further improved as the utility model, upper side and the seam under drive plate of the block ring keep 0.5 The gap of~2.5mm.

3. beneficial effect

The technical scheme provided using the utility model, compared with prior art, is had the advantages that：

(1) in the utility model, choked flow mechanism is installed on upper connector, and choked flow mechanism be located at drive plate under seam with The place of being association of activity and inertia of upper connector, therefore, can be by choked flow mechanism between the cooperation under drive plate between seam and upper connector Gap is protected, and prevents above-mentioned fit clearance from becoming the variety of problems for causing greatly because of abrasion；Specifically：Choked flow mechanism includes transversal Face is the block ring of " ┓ shapes ", and the medial surface of block ring is enclosed within the lateral surface of upper connector, is enclosed within by block ring medial surface On upper connector lateral surface, be prevented from seam and upper connector under drive plate place's leaking out vertically of being association of activity and inertia, Leakage powder, the upper side of block ring just to seam under the drive plate of top, by seam under block ring upper side and drive plate keep compared with Small gap, on the one hand ensure that freely rotating for drive plate, on the other hand can suppress above-mentioned place of being association of activity and inertia along level side To leak out, leak powder.

(2) in the utility model, block ring is divided into multi-section circular arc, and the two ends of every section of circular arc are extended with connecting rod, Corresponding two connecting rods are connected and fixed by a connecting bolt on adjacent two sections of circular arcs, block ring are divided into many Individual module recombinant is installed, and greatly improves the convenient degree of block ring installation, and facilitates the local tune after block ring is installed It has suffered journey.

(3) in the utility model, horizontal support, the welding of horizontal support have been evenly distributed on the lateral surface of upper connector Position determines according to the position of seam under drive plate and the height of block ring, is threaded with each horizontal support upwards Regulating bolt, the downside of block ring is against at the top of regulating bolt, the support of block ring, positioning are made by regulating bolt With can easily change the location of block ring, so as to reach under adjustment block ring upper side and drive plate between seam The effect in gap.

(4) in the utility model, the stuffing-box of filling airtight and watertight padding is machined with the medial surface and upper side of block ring, So that the sealing of fit clearance more preferably, further avoid place of being association of activity and inertia between seam and upper connector under drive plate Leak out, leak powder phenomenon so that the fit clearance under drive plate between seam and upper connector is difficult the expansion that is worn；This In utility model, graphite packing is selected in airtight and watertight padding, and the heat-resisting quantity of graphite packing is excellent, is suitable for medium-speed pulverizer support close Seal up.

Brief description of the drawings

Fig. 1 (is not drawn into choked flow machine for the structural representation of the medium-speed pulverizer support sealing device of embodiment 1~7 in figure Structure)；

Fig. 2 is the assembling schematic diagram of choked flow mechanism in embodiment 1~7；

Fig. 3 is the enlarged drawing at A in Fig. 2；

Fig. 4 is the structural representation of block ring in embodiment 2~7.

Label declaration in schematic diagram：

101st, block ring；102nd, horizontal support；103rd, regulating bolt；104th, connecting rod；105th, connecting bolt；106th, seal Filler；201st, upper connector；202nd, lower connector；3rd, drive plate；301st, seam under drive plate；401st, the first fastening bolt； 402nd, sealing cord；501st, upper sealing ring；502nd, lower sealing ring；503rd, spring；504th, carbon dam；505th, the second fastening spiral shell Bolt.

Specific embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, is clearly and completely described, it is clear that retouched to the technical scheme in the utility model embodiment The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Therefore, below to providing in the accompanying drawings The detailed description of embodiment of the present utility model be not intended to limit claimed scope of the present utility model, but only Represent selected embodiment of the present utility model.Based on the embodiment in the utility model, those of ordinary skill in the art are not having The every other embodiment obtained under the premise of creative work is made, the scope of the utility model protection is belonged to.

To further appreciate that content of the present utility model, the utility model is described in detail with reference to accompanying drawing.

Embodiment 1

Medium-speed pulverizer is thermal power plant's heavy duty boiler unit pulverized coal preparation system common equipment, is the main power consumption of boiler controller system One of equipment, its operation conditions is closely related with the economic benefit of power plant.The sealing gland part that stone coal discharge causes in coal pulverizer Abrasion and gas sealing system leakage are the FAQs in medium-speed pulverizer running, and thus bring parts replacement and set The increase of standby maintenance cost, substantially increases the operating cost of boiler controller system, has had a strong impact on the economic benefit of power plant.But, The support sealing of existing medium-speed pulverizer is inevitably present problems with actual applications：Due to being passed in installation process Vibration, the screeding device of cleaning pebble coal when Moving plate has deviation, operation with the concentricity of support sealing are damaged, sealing air blast Too low the problems such as, cause the fit clearance under drive plate between the upper connector of seam and support seal casinghousing and easily wear and tear change Greatly, hot blast is largely leaked, and substantial amounts of coal grain can be carried when serious.The thing followed is carbon dam damage, drive plate bottom There is groove, sealing blast and maintains situations such as not living in the position coordinated with carbon dam, if treatment will be caused very not in time Ill effect, therefore, how to overcome in existing medium-speed pulverizer because between the cooperation under drive plate between seam and upper connector Gap is easily worn and torn and becomes variety of problems that is big and causing, is the technical problem of urgent need to resolve in the prior art.In of the present utility model Speed coal mill support sealing device just solves above mentioned problem, specific as follows：

With reference to Fig. 1~3, the medium-speed pulverizer support sealing device of the present embodiment, including support seal casinghousing and drive plate 3, support seal casinghousing includes upper and lower connected upper connector 201 and lower connector 202, and the top of drive plate 3 is provided with drive plate Lower seam 301；Also include choked flow mechanism, choked flow mechanism is installed on upper connector 201, and choked flow mechanism stops under drive plate The place of being association of activity and inertia of mouth 301 and upper connector 201；Choked flow mechanism includes that cross section is the block ring 101 of " ┓ shapes ", the block ring 101 medial surface is enclosed within the lateral surface of upper connector 201, and the upper side of the block ring 101 under the drive plate of top just to stopping Mouth 301.

In the present embodiment, choked flow mechanism is installed on upper connector 201, and choked flow mechanism is located at seam 301 under drive plate With the place of being association of activity and inertia of upper connector 201, therefore, can by choked flow mechanism to seam under drive plate 301 and upper connector 201 it Between fit clearance protected, prevent above-mentioned fit clearance because abrasion become it is big the variety of problems that causes；Specifically：Choked flow machine Structure includes that cross section is the block ring 101 of " ┓ shapes ", and the medial surface of block ring 101 is enclosed within the lateral surface of upper connector 201, leads to Cross the medial surface of block ring 101 to be enclosed within the lateral surface of upper connector 201, be prevented from seam 301 and upper connector 201 under drive plate Place's leaking out, leaking powder vertically of being association of activity and inertia, the upper side of block ring 101 just to seam 301 under the drive plate of top, Seam 301 under the upper side of block ring 101 and drive plate is kept into less gap, freely turning for drive plate 3 is on the one hand ensure that It is dynamic, on the other hand can suppress above-mentioned place's leaking out, leaking powder in the horizontal direction of being association of activity and inertia.

Embodiment 2

With reference to Fig. 1~4, the medium-speed pulverizer support sealing device of the present embodiment, its structure is substantially the same manner as Example 1, Further：Block ring 101 is divided into multi-section circular arc (being four arcses in specific the present embodiment), every section of two ends of circular arc Connecting rod 104 is extended with, corresponding two connecting rods 104 connect solid by a connecting bolt 105 on adjacent two sections of circular arcs It is scheduled on together.

In the present embodiment, block ring 101 is divided into multi-section circular arc, and every section of two ends of circular arc are extended with connecting rod 104, Corresponding two connecting rods 104 are connected and fixed by a connecting bolt 105 on adjacent two sections of circular arcs, by block ring 101 are divided into multiple module recombinants installs, and greatly improves the convenient degree of the installation of block ring 101, and facilitate block ring Local directed complete set process after 101 installations.

Embodiment 3

With reference to Fig. 1~4, the medium-speed pulverizer support sealing device of the present embodiment, its structure is substantially the same manner as Example 2, Further：Horizontal support 102 is evenly distributed on the lateral surface of upper connector 201, screw thread on each horizontal support 102 Upward regulating bolt 103 is connected with, the top of regulating bolt 103 is against the downside of block ring 101.

In the present embodiment, horizontal support 102 is evenly distributed on the lateral surface of upper connector 201, horizontal support 102 Welding position determines according to the position of seam under drive plate 301 and the height of block ring 101, on each horizontal support 102 Upward regulating bolt 103 is threaded with, the top of regulating bolt 103 is against the downside of block ring 101, by adjusting spiral shell Support, positioning action of the bolt 103 to block ring 101, can easily change the location of block ring 101, so as to reach tune Under the upper side of whole block ring 101 and drive plate between seam 301 gap effect；Particularly choked flow mechanism long-play it Afterwards, when gap changes between seam 301 under the upper side of block ring 101 and drive plate, regulating bolt 103 can be adjusted by choked flow Ring 101 is moved up and down, so as to keep under the upper side of block ring 101 and drive plate between seam 301 gap in prescribed limit It is interior, it is ensured that the pressure in sealed chamber, while having reached reduction maintenance duration, having reduced maintenance cost, adjust and simply and easily imitate Really.

Embodiment 4

With reference to Fig. 1~4, the medium-speed pulverizer support sealing device of the present embodiment, its structure is substantially the same manner as Example 3, Further：It is machined with the medial surface and upper side of block ring 101 and airtight and watertight padding is filled with stuffing-box, stuffing-box 106；Airtight and watertight padding 106 is graphite packing.

In the present embodiment, the filler of filling airtight and watertight padding 106 is machined with the medial surface and upper side of block ring 101 Letter, so that the sealing of fit clearance more preferably, further avoid between seam 301 and upper connector 201 under drive plate Place of being association of activity and inertia leaks out, leaks powder phenomenon, so that the fit clearance under drive plate between seam 301 and upper connector 201 It is difficult the expansion that is worn；In the present embodiment, graphite packing is selected in airtight and watertight padding 106, and the heat-resisting quantity of graphite packing is excellent, is adapted to In in the sealing of medium-speed pulverizer support.

Embodiment 5

With reference to Fig. 1~4, the medium-speed pulverizer support sealing device of the present embodiment, its structure is substantially the same manner as Example 4, Further：The upper side of block ring 101 keeps the gap of 0.5~2.5mm with seam 301 under drive plate.

In this implementation, the upper side of block ring 101 keeps the gap of 0.5~2.5mm with seam 301 under drive plate, both full The requirement that foot drive plate 3 is freely rotated, in turn ensures that certain between seam 301 under the upper side of block ring 101 and drive plate Sealing property.

Embodiment 6

With reference to Fig. 1~4, the medium-speed pulverizer support sealing device of the present embodiment, its structure is substantially the same manner as Example 5, Further：Upper connector 201 and lower connector 202 are fixed together by the first fastening bolt 401, the first fastening bolt 401 inner sides are provided with the circular sealing cord 402 of S-shaped, and upper connector 201 and lower company are able to ensure that by the circular sealing cord 402 of S-shaped The air-tightness of contact surface between fitting 202.

Also include upper sealing ring 501 and lower sealing ring 502, upper sealing ring 501 and lower sealing ring 502 are by the second fastening spiral shell Bolt 505 is fixed on lower connector 202 from top to bottom；Upper sealing ring 501, lower sealing ring 502 medial surface relative with drive plate 3 On be respectively equipped with annular groove, carbon dam 504 is installed in annular groove, carbon dam 504 is sleeved on the cylindrical of the bottom of drive plate 3 Radial seal structure is constituted on all sides.By the setting of upper sealing ring 501 and lower sealing ring 502, in the outer of the bottom of drive plate 3 The sealing structure of upper and lower twice carbon dam 504 is formed on circumference side, the sealing property of the bottom of drive plate 3 is improve.

Single ear anti-motion washer is combined with first fastening bolt 401, in the second fastening bolt 505, by monaural stop Packing ring enables to keep stable fastening force during the first fastening bolt 401, the use of the second fastening bolt 505, and lifting makes Use effect.

Embodiment 7

With reference to Fig. 1~4, the medium-speed pulverizer support sealing device of the present embodiment, its structure is substantially the same manner as Example 6, Further：The spring 503 being connected with carbon dam 504 is provided with annular groove, the spring 503 is used for carbon dam On the 504 excircle sides for pressing to the bottom of drive plate 3.

The spring 503 being connected with carbon dam 504 is provided with the present embodiment, in annular groove, can be by carbon by spring 503 Accurate seal ring 504 is pressed on the excircle side of the bottom of drive plate 3, it is ensured that sealing effectiveness；And carbon dam 504 can be in ring Float in groove, the gauge wear for occurring herein can automatically be compensated by the effect of spring 503, it is ensured that sealing effectiveness, extend The service life of carbon dam 504.

The medium-speed pulverizer support sealing device of the present embodiment, overcome in existing medium-speed pulverizer because under drive plate seam with Fit clearance between upper connector is easily worn and torn and becomes variety of problems that is big and causing, is extended the service life of equipment, is saved Maintenance cost, the security, the economy that improve coal pulverizer operation, reduce maintenance workload, reduce labour intensity, together When improve scene and carry out production strictly in line with rules and regulations level.

Schematically the utility model and embodiments thereof are described above, the description does not have restricted, accompanying drawing Shown in be also one of implementation method of the present utility model, actual structure is not limited thereto.So, if this area Those of ordinary skill enlightened by it, do not departing from the case that the utility model creates objective, designed without creative The frame mode similar to the technical scheme and embodiment, all should belong to protection domain of the present utility model.

Claims (6)

1. a kind of combined type choke apparatus, it is characterised in that：Including choked flow mechanism, the choked flow mechanism is installed on upper connector (201) on, and the choked flow mechanism is located at the place of being association of activity and inertia of seam (301) and upper connector (201) under drive plate；

The choked flow mechanism includes that cross section is the block ring (101) of " ┓ shapes ", and the medial surface of the block ring (101) is enclosed within company On the lateral surface of fitting (201), the upper side of the block ring (101) is just to seam (301) under the drive plate of top.

2. combined type choke apparatus according to claim 1, it is characterised in that：The block ring (101) is divided into many Section circular arc, every section of two ends of circular arc are extended with connecting rod (104), corresponding two connecting rods (104) on adjacent two sections of circular arcs It is connected and fixed by a connecting bolt (105).

3. combined type choke apparatus according to claim 2, it is characterised in that：The lateral surface of the upper connector (201) On be evenly distributed horizontal support (102), upward regulating bolt (103) is threaded with each horizontal support (102), The downside of the block ring (101) is against at the top of the regulating bolt (103).

4. combined type choke apparatus according to claim 3, it is characterised in that：The medial surface of the block ring (101) and It is machined with upper side and airtight and watertight padding (106) is filled with stuffing-box, described filler letter.

5. combined type choke apparatus according to claim 4, it is characterised in that：The airtight and watertight padding (106) is graphite plate Root.

6. combined type choke apparatus according to Claims 1 to 5 any one, it is characterised in that：The block ring (101) Upper side and drive plate under seam (301) keep the gap of 0.5~2.5mm.