CN107082227B

CN107082227B - Temperature-resistant and pressure-resistant tubular buried scraper conveyor

Info

Publication number: CN107082227B
Application number: CN201710380721.3A
Authority: CN
Inventors: 王传平; 刘倍; 周绍春
Original assignee: Hubei Yidu Yunji Electromechanical Co ltd
Current assignee: Hubei Yidu Yunji Electromechanical Co ltd
Priority date: 2017-05-25
Filing date: 2017-05-25
Publication date: 2022-07-29
Anticipated expiration: 2037-05-25
Also published as: CN107082227A

Abstract

The invention relates to a temperature-resistant and pressure-resistant tubular buried scraper conveyor, which comprises a head part, a tail part and a middle section, wherein a motor and a speed reducer are arranged at the head part, a riding wheel device, a scraper chain and a sliding frame are arranged in the middle section, two ends of the scraper chain are respectively connected with the head part and the tail part, the middle section of the scraper chain is overlapped on the riding wheel device and the sliding frame, and the middle section is composed of a plurality of circular tubes which are sequentially connected.

Description

Temperature-resistant and pressure-resistant tubular buried scraper conveyor

Technical Field

The invention relates to a temperature-resistant and pressure-resistant tubular buried scraper conveyor.

Background

The prior blast furnace dry ash conveying process comprises the following steps: the ash powder enters the buried scraper conveyor to be in a normal pressure state through the middle two-stage buffer bin and the two-stage valve in an exchange opening mode. The process links are complex, the valve is worn quickly, the pipeline is blocked frequently, and the maintenance and the replacement are frequent. In order to simplify the process route, reduce the maintenance cost and reduce the labor intensity of workers, a middle buffer bin and a valve are required to be cancelled in the new process, so that materials can rapidly enter the buried scraper conveyor under the pressure state of 0.2 Mpa. However, the middle shell of the existing airtight type embedded scraper conveyor is of a rectangular structure spliced by steel plates, so that the shell can deform to cause ash leakage, serious potential safety hazards exist, and the use requirement of a new process route cannot be met.

Disclosure of Invention

The invention aims to provide a temperature-resistant and pressure-resistant tubular buried scraper conveyor, so that the buried scraper conveyor can safely and stably operate for a long time under the environment of 0.2Mpa and 350 ℃, and the problem of ash powder leakage is solved.

In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a temperature resistant withstand voltage tubular buries scraper conveyor, includes head, afterbody and interlude, installs motor and speed reducer at the head, is equipped with riding wheel device, scraper chain and balladeur train in the interlude, scraper chain both ends respectively with head and caudal joint, scraper chain middle section overlap joint is on riding wheel device and balladeur train, the interlude comprises many pipes that connect gradually.

The scraper chain comprises a die forging chain and a plurality of arc-shaped scrapers mounted on the die forging chain.

The head comprises two closed shells which are fixedly connected with two sides of the middle section respectively, a support piece is arranged in each shell, a driving rotating shaft is arranged in each middle section, two ends of each driving rotating shaft penetrate through the outer wall of each middle section and are connected with two groups of support pieces respectively, a driving chain wheel is arranged on each driving rotating shaft, the scraper chain is arranged on each driving chain wheel, the motor drives each driving rotating shaft to rotate through a speed reducer, a partition plate is arranged in each shell and divides each shell into two closed cavities, and the support pieces are arranged on the partition plates;

the supporting piece comprises a bearing seat arranged on the partition plate, a closed cavity is arranged in the bearing seat, a taper sleeve bearing is arranged in the closed cavity, the end part of the driving rotating shaft penetrates through the partition plate and is connected into the taper sleeve bearing, and the bearing seat and the driving rotating shaft are sealed through a sealing piece; the sealing member includes the sealed packing that sets up between initiative pivot and bearing frame and installs on the bearing frame, the cover seal box outside initiative pivot, is equipped with temperature resistant lip type sealing washer and labyrinth sealing washer in seal box, and the intercommunication has a nitrogen gas pipe on the cover seal box.

The tail part comprises a housing communicated with one end of the middle section, a driven rotating shaft is arranged in the housing, two ends of the driven rotating shaft are connected with two groups of supporting pieces, two ends of the housing are respectively provided with a group of screw rod tensioning mechanisms, and one ends of screw rods of the two groups of tensioning mechanisms are respectively connected with the two groups of supporting pieces; one end of the driven rotating shaft is connected with a velocity measurement grating, and a photoelectric sensor matched with the velocity measurement grating for use is installed on the housing.

Install on the housing and sweep device and manhole access door, be equipped with the glass sight glass on the access door, sweep the dust that the device is used for sweeping on the glass sight glass, sweep the device and include the trachea, install check valve and nozzle on the trachea.

The sliding frame comprises a support frame and two support bars which are fixedly arranged on two sides of the inner wall of the middle section respectively; the support frame both ends are detachable to be connected at two spinal branch daggers, and fixed mounting has last guide rail set spare on the support frame.

The riding wheel device comprises two air chambers which are respectively connected to two sides of the middle section, each air chamber is isolated from the middle section by a supporting plate, and the riding wheel device further comprises a riding wheel arranged in the middle section, the riding wheel is installed on a riding shaft, two rocking rods are respectively hinged to two ends of the riding shaft, one ends of the two rocking rods respectively penetrate through the supporting plates on two sides of the middle section to enter the air chambers, the rocking rods are hinged to the supporting plates, an oil cylinder is arranged in each air chamber, the upper end of the oil cylinder is hinged to the inner wall of the air chamber, the lower end of the oil cylinder is hinged to one end of the rocking rod, the two oil cylinders are connected with a hydraulic synchronous loop, and a pressure sensor used for detecting the pressure of the upper cavities of the two oil cylinders is installed on the hydraulic synchronous loop.

The gap between the rocker and the supporting plate is sealed by a filler, and nitrogen is filled in the air chamber.

The invention has the beneficial effects that:

1. the invention uses circular tubes to replace the prior embedded scraper conveyor and adopts a rectangular shell structure spliced by steel plates, and adopts an arc scraper and a special sealing method, so that the embedded scraper conveyor can safely and stably operate for a long time under the environment of 0.2Mpa pressure and 350 ℃, and the ash powder leakage is effectively prevented.

2. The scraper chain adopts a die forging chain and an arc scraper structure, and has the characteristics of low gravity center, stable operation and low failure rate.

3. The head bearing is sealed by adopting the sealing modes of packing seal, labyrinth seal and temperature-resistant lip type, so that the bearing is effectively protected from the influence of gas dust, and the service life of the bearing is prolonged. The driving part adopts a direct-connected speed reducer, so that the defect that a shell is not airtight due to shaft deformation caused by the action of bending moment in a chain transmission mode is overcome.

4. The sealing structure at the tail part can reliably and effectively prevent dust from entering the bearing, and the use reliability is improved; the photoelectric sensor converts the detected light wave signal into a pulse type, and then feeds back the pulse type to the signal processor, and the signal processor feeds back a switching value signal to the central control system. When the speed of the scraper chain is reduced by below 60%, the central control system gives an alarm to prevent other hazards caused by chain breakage and improve the safety; the blowing device can blow the glass sight glass, so that dust is prevented from blocking the sight glass to influence the observation effect.

5. The upper guide rail assembly and the support frame are combined into a whole, and the whole is only required to slide onto the support bars in the shell during assembly. Then fix support frame both ends, only need during the change with both ends unblock, can accomplish the change of upper and lower guide rail, the later maintenance of equipment is very convenient.

6. The supporting wheel in the supporting wheel device is lifted by two rocking bars, so that the chain is tensioned, the extension of the scraper chain caused by high temperature can be compensated, and the scraper chain is always maintained in a proper tensioning state; in addition, the oil pressure change of an oil cavity of the oil cylinder is monitored in real time by using the pressure sensor, and the running condition of the scraper chain is monitored by using the change, so that the running safety of the device is further improved.

7. The air chamber is sealed by nitrogen, can avoid the dust to reveal the external world by the air chamber.

Drawings

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic front view of the present invention,

FIG. 2 is a front view of the scraper chain of the present invention,

FIG. 3 is a front view of the structure of the arc-shaped scraping plate,

figure 4 is a schematic cross-sectional view of the head structure according to the present invention,

figure 5 is a schematic cross-sectional view of the tail structure of the present invention,

FIG. 6 is a schematic cross-sectional view of the riding wheel device of the present invention,

figure 7 is a schematic cross-sectional view of a middle section according to the present invention,

fig. 8 is a schematic diagram of the connection of the hydraulic synchronization circuit of the present invention.

In the figure: the device comprises a head part 1, a motor 2, a speed reducer 3, a riding wheel device 4, a scraper chain 5, a middle section 6, a tail part 7, a bearing seat 9, a taper sleeve bearing 10, a nitrogen pipe 11, an oil cylinder 12, a driving rotating shaft 13, a sealing packing 14, a manhole access door 15, a driven rotating shaft 17, a gland sealing box 18, a labyrinth sealing ring 19, a temperature-resistant lip type sealing ring 20, a speed measurement grating 21, a photoelectric sensor 22, a glass viewing mirror 23, a tensioning screw rod 24, an air pipe 25, a screw rod housing 26, a die forging chain 27, a rocker 28, a riding wheel 29, a supporting plate 31, a packing 32, an air chamber 33, a pressure sensor 34, a hydraulic control one-way valve 35, a flow distribution and collection valve 36, a three-position four-way valve 37, an adjustable sequence valve 38, an upper guide rail assembly 39, a supporting frame 40, a supporting bar 41, a riding shaft 42, a shell 101, a partition plate 102, a driving chain wheel 103, an arc-shaped scraper 271 and a housing 701.

Detailed Description

As shown in fig. 1 and 7, a temperature-resistant and pressure-resistant tubular buried scraper conveyor comprises a head part 1, a tail part 7 and a middle section 6, wherein a motor 2 and a speed reducer 3 are installed on the head part 1, a riding wheel device 4, a scraper chain 5 and a carriage are arranged in the middle section 6, two ends of the scraper chain 5 are respectively connected with the head part 1 and the tail part 7, the middle section of the scraper chain 5 is lapped on the riding wheel device 4 and the carriage, the middle section 6 is composed of a plurality of sequentially connected circular tubes, each circular tube is connected by a convex flange, and the flange connection surface adopts an airtight and pressure-resistant design; the pressure resistance of the round pipe is good, and material leakage is avoided; the sectional area of the shell is small, and the installation space is saved.

As shown in fig. 2 and 3, the blade chain 5 includes a die forging chain 27 and a plurality of arc-shaped blades 271 mounted on the die forging chain 27. The die forging chain 27 that arc scraper 271 middle part is connected, the both ends that arc scraper 271 perk is located die forging chain 27 top, and this kind of structure arc scraper 271 compares square scraper, and its focus falls on die forging chain 27, can not shake because of the focus deviates die forging chain 27 at the operation, and it is more steady to operate.

As shown in fig. 1 and 4, the head 1 includes two closed housings 101 fixedly connected to two sides of the middle section 6, respectively, a support member is disposed in the housing 101, a driving rotating shaft 13 is disposed in the middle section 6, two ends of the driving rotating shaft 13 penetrate through the outer wall of the middle section 6 and are connected to two sets of support members, respectively, a driving sprocket 103 is disposed on the driving rotating shaft 13, the scraper chain 5 is mounted on the driving sprocket 103, the motor 2 drives the driving rotating shaft 13 to rotate through the speed reducer 3, a partition plate 102 is disposed in the housing 101, the partition plate 102 divides the housing 101 into two closed cavities, and the support members are mounted on the partition plate 102;

the supporting piece comprises a bearing seat 9 arranged on a partition plate 102, a closed cavity is arranged in the bearing seat 9, a taper sleeve bearing 10 is arranged in the closed cavity, the end part of a driving rotating shaft 13 penetrates through the partition plate 102 and is connected into the taper sleeve bearing 10, and the bearing seat 9 and the driving rotating shaft 13 are sealed through a sealing piece; the sealing element comprises a sealing packing 14 arranged between the driving rotating shaft 13 and the bearing seat 9 and a gland sealing box 18 which is arranged on the bearing seat 9 and sleeved outside the driving rotating shaft 13, a temperature-resistant lip type sealing ring 20 and a labyrinth type sealing ring 19 are arranged in the gland sealing box 18, and the gland sealing box 18 is communicated with a nitrogen pipe 11.

The bearing seal of the head part 1 adopts packing 14 seal, labyrinth seal and temperature-resistant lip seal, so that the bearing is effectively protected from the influence of gas dust, and the service life of the bearing is prolonged. The driving part adopts a direct connection speed reducer 3, so that the defect that the shell 101 is not airtight due to shaft deformation caused by the action of bending moment in a chain transmission mode is avoided; on the other hand, the supporting member is disposed in the closed casing 101, and is sealed by the casing 101, and the casing 101 is used to isolate the supporting member from the outside, thereby further improving the sealing effect.

As shown in fig. 1 and 5, the tail portion 7 includes a housing 701 communicated with one end of the middle section 6, a driven rotating shaft 17 is arranged in the housing 701, two ends of the driven rotating shaft 17 are connected with two sets of supporting members, two ends of the housing 701 are respectively provided with a set of screw tensioning mechanisms, and one ends of screws of the two sets of tensioning mechanisms are respectively connected with the two sets of supporting members; one end of the driven rotating shaft 17 is connected with a velocity measurement grating 21, a photoelectric sensor 22 matched with the velocity measurement grating 21 is installed on the housing 701, and the monitored signal is transmitted to the signal processor by the photoelectric sensor 22.

The speed measuring grating 21 rotates along with the movement of the scraper chain 5, the photoelectric sensor 22 converts the detected light wave signal into a pulse type, and then the pulse type is fed back to the signal processor, and the signal processor feeds back a switching value signal to the central control system. When the speed of the scraper chain 5 is reduced by below 60%, the central control system gives an alarm to prevent chain breakage from causing other hazards, and the safety is improved.

Install on housing 701 and sweep device and manhole access door 15, be equipped with glass sight glass 23 on access door 15, sweep the dust that the device is used for sweeping glass sight glass 23, sweep the device and include trachea 25, install check valve and nozzle on trachea 25. The check valve can prevent that equipment internal pressure from leaking through trachea 25, and compressed air accessible outside pipeline reaches the nozzle and sweeps glass sight glass 23, prevents that the dust from sheltering from the sight glass, influences the observation effect.

As shown in fig. 7, the carriage includes a support frame 40 and two support bars 41 respectively fixedly installed on two sides of the inner wall of the middle section 6; two ends of the support frame 40 are detachably connected to two support bars 41, and an upper guide rail assembly 39 is fixedly mounted on the support frame 40.

The support frame 40 and the upper rail assembly 39 are simply slid together onto the support bars 41 within the housing 101 during assembly. Then fix support frame 40 both ends, only need during the change with both ends unblock, can accomplish the change of upper and lower guide rail, the later maintenance of equipment is very convenient.

As shown in fig. 6 and 8, the riding wheel device 4 includes two air chambers 33 respectively connected to two sides of the middle section 6, each air chamber 33 is isolated from the middle section 6 by a support plate 31, and also includes a riding wheel 29 arranged in the middle section 6, the riding wheel 29 is mounted on a riding shaft 42, two ends of the riding shaft 42 are respectively hinged with a rocker 28, one end of each rocker 28 respectively penetrates through the support plates 31 at two sides of the middle section 6 and enters the air chamber 33, the rocker 28 is hinged with the support plate 31, an oil cylinder 12 is arranged in each air chamber 33, the upper end of the oil cylinder 12 is hinged on the inner wall of the air chamber 33, the lower end of the oil cylinder 12 is hinged with one end of the rocker 28, the two oil cylinders 12 are connected with a hydraulic synchronization circuit, a pressure sensor 34 for detecting the pressure in the upper chambers of the two oil cylinders 12 is mounted on the hydraulic synchronization circuit, and the pressure sensor 34 transmits the pressure to a signal processor in real time. The hydraulic synchronization circuit comprises a three-position four-way valve 37, a flow dividing and combining valve 36, a hydraulic control one-way valve 35 and an adjustable sequence valve 38.

As shown in fig. 8, after the chambers in the two oil cylinders 12 are pressurized synchronously, the piston rods of the oil cylinders 12 lift the supporting wheels 29 synchronously through the two rocking bars 28, the scraper chain 5 loaded on the supporting wheels 29 is tensioned, meanwhile, the pressure sensor 34 detects the oil pressure in the chambers in the oil cylinders 12, when the oil pressure in the chambers reaches a preset value PA, the oil cylinders 12 stop loading, that is, the three-position four-way valve 37 in the hydraulic synchronous circuit returns to the middle position; along with the rise of the temperature, the scraper chain 5 extends, the tension of the chain is slowly weakened, the oil pressure of the upper cavity is reduced, when the oil pressure of the upper cavity is reduced to PB, the three-position four-way valve 37 is reversed, the upper cavity of the oil cylinder 12 is pressurized, the oil pressure of the oil cylinder is restored to PA, and the secondary tensioning of the chain is realized; when the scraper conveyor stops, the temperature slowly drops, the scraper chain 5 is shortened, the chain tension is increased, the oil pressure of the upper cavity rises, when the temperature rises to PC, the three-position four-way valve 37 is reversed, the piston of the oil cylinder 12 retracts, the tension of the scraper chain 5 is released, and the damage of the scraper chain 5 due to excessive tensioning of the upper time is avoided; in addition, in the normal operation process of the scraper chain 5, if the scraper chain 5 is broken, the pressure applied to the supporting wheel 29 by the scraper chain 5 is also suddenly reduced, at this time, the oil pressure of the upper cavity of the oil cylinder 12 is also suddenly reduced, when the pressure sensor 34 monitors that the oil pressure of the upper cavity is detected within T seconds, the pressure is changed from PA to PD, and the signal processor controls the scraper conveyor to stop, so that the conveyor is prevented from being damaged by broken chain, and the safety in use is further improved.

The gap between the rocker arm 28 and the support plate 31 is sealed by packing, and the gas chamber 33 is filled with nitrogen gas. The gas chamber 33 is sealed by nitrogen gas, so that dust can be prevented from leaking from the gas chamber 33 to the outside.

Claims

1. The utility model provides a temperature resistant withstand voltage tubular buries scraper conveyor, includes head (1), afterbody (7) and interlude (6), installs motor (2) and speed reducer (3) in head (1), is equipped with riding wheel device (4) in interlude (6), scraper chain (5) and balladeur train, scraper chain (5) both ends are connected with head (1) and afterbody (7) respectively, and scraper chain (5) middle section overlap joint is on riding wheel device (4) and balladeur train, its characterized in that: the middle section (6) is composed of a plurality of circular tubes which are connected in sequence;

the scraper chain (5) comprises a die forging chain (27) and a plurality of arc-shaped scrapers (271) arranged on the die forging chain (27);

the riding wheel device (4) comprises two air chambers (33) respectively connected with two sides of the middle section (6), each air chamber (33) is isolated from the middle section (6) by a supporting plate (31), and also comprises a riding wheel (29) arranged in the middle section (6), the riding wheel (29) is arranged on a riding shaft (42), two ends of the support shaft (42) are respectively hinged with a rocker (28), one end of each rocker (28) respectively penetrates through the support plates (31) at two sides of the middle section (6) to enter the air chamber (33), the rockers (28) are hinged with the support plates (31), an oil cylinder (12) is arranged in each air chamber (33), the upper end of the oil cylinder (12) is hinged on the inner wall of the air chamber (33), the lower end of the oil cylinder (12) is hinged at one end of a rocker (28), the two oil cylinders (12) are connected with a hydraulic synchronous loop, and a pressure sensor (34) for detecting the pressure of the upper cavities of the two oil cylinders (12) is arranged on the hydraulic synchronous circuit.

2. The temperature-resistant and pressure-resistant tubular embedded scraper conveyor as claimed in claim 1, wherein: the head (1) comprises two closed shells (101) which are fixedly connected to two sides of a middle section (6) respectively, supporting pieces are arranged in the shells (101), a driving rotating shaft (13) is arranged in the middle section (6), two ends of the driving rotating shaft (13) penetrate out of the outer wall of the middle section (6) and are connected with two groups of supporting pieces respectively, a driving chain wheel (103) is arranged on the driving rotating shaft (13), a scraper chain (5) is installed on the driving chain wheel (103), a motor (2) drives the driving rotating shaft (13) to rotate through a speed reducer (3), a partition plate (102) is arranged in the shells (101), the shells (101) are divided into two closed cavities by the partition plate (102), and the supporting pieces are installed on the partition plate (102);

the support piece comprises a bearing seat (9) arranged on a partition plate (102), a closed cavity is arranged in the bearing seat (9), a taper sleeve bearing (10) is arranged in the closed cavity, the end part of the driving rotating shaft (13) penetrates through the partition plate (102) to be connected into the taper sleeve bearing (10), and the bearing seat (9) and the driving rotating shaft (13) are sealed through a sealing piece; the sealing element comprises a sealing packing (14) arranged between the driving rotating shaft (13) and the bearing seat (9) and a gland sealing box (18) arranged on the bearing seat (9) and sleeved outside the driving rotating shaft (13), a temperature-resistant lip type sealing ring (20) and a labyrinth type sealing ring (19) are arranged in the gland sealing box (18), and the gland sealing box (18) is communicated with a nitrogen pipe (11).

3. The temperature-resistant and pressure-resistant tubular embedded scraper conveyor as claimed in claim 2, wherein: the tail part (7) comprises a housing (701) communicated with one end of the middle section (6), a driven rotating shaft (17) is arranged in the housing (701), two ends of the driven rotating shaft (17) are connected with two groups of supporting pieces, two ends of the housing (701) are respectively provided with a group of lead screw tensioning mechanisms, and one ends of lead screws of the two groups of tensioning mechanisms are respectively connected with the two groups of supporting pieces; one end of the driven rotating shaft (17) is connected with a speed measuring grating (21), and a photoelectric sensor (22) matched with the speed measuring grating (21) for use is installed on the housing (701).

4. The temperature-resistant and pressure-resistant tubular embedded scraper conveyor as claimed in claim 3, wherein: install on housing (701) and sweep device and manhole access door (15), be equipped with glass sight glass (23) on manhole access door (15), sweep the dust that the device is used for sweeping glass sight glass (23), sweep the device and include trachea (25), install check valve and nozzle on trachea (25).

5. The temperature-resistant and pressure-resistant tubular embedded scraper conveyor as claimed in claim 1, wherein: the sliding frame comprises a support frame (40) and two support bars (41) which are respectively and fixedly arranged on two sides of the inner wall of the middle section (6); two ends of the support frame (40) are detachably connected with the two support bars (41), and an upper guide rail assembly (39) is fixedly arranged on the support frame (40).

6. The temperature-resistant and pressure-resistant tubular embedded scraper conveyor as claimed in claim 1, wherein: the gap between the rocker (28) and the support plate (31) is sealed by a packing, and the gas chamber (33) is filled with nitrogen gas.