CN111153174A - Bulk material two-equal-division one-pass four-way device and control method - Google Patents
Bulk material two-equal-division one-pass four-way device and control method Download PDFInfo
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- CN111153174A CN111153174A CN202010065192.XA CN202010065192A CN111153174A CN 111153174 A CN111153174 A CN 111153174A CN 202010065192 A CN202010065192 A CN 202010065192A CN 111153174 A CN111153174 A CN 111153174A
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- 239000013590 bulk material Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 92
- 238000009826 distribution Methods 0.000 claims abstract description 35
- 244000126211 Hericium coralloides Species 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/34—Devices for discharging articles or materials from conveyor
- B65G47/44—Arrangements or applications of hoppers or chutes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/34—Devices for discharging articles or materials from conveyor
- B65G47/42—Devices for discharging articles or materials from conveyor operated by article or material being conveyed and discharged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
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Abstract
The invention relates to a bulk material distributing device, in particular to a bulk material two-uniform-distribution one-straight-through four-way device and a control method. The device comprises an electro-hydraulic chute adjusting device, a four-way forked chute and an electro-hydraulic comb-shaped device; the electro-hydraulic chute adjusting device is arranged in a chute at the head of the belt conveyor and is positioned at the front part of the material flow advancing direction, the four-way branched chute is connected with the bottom of the chute at the head of the belt conveyor, and the electro-hydraulic comb-shaped device is arranged in the four-way branched chute and is positioned at the branch part of the four-way branched chute. The belt conveyor is not influenced by deviation and unstable material flow thickness of the belt conveyor, the material flow width is ensured to be unchanged from the original conveying width, the space distance in the vertical direction is shortened, and the two-equal-distribution straight-through four-way distribution of bulk materials can be remotely controlled when similar materials are conveyed in a conversion mode.
Description
Technical Field
The invention relates to a bulk material distributing device, in particular to a bulk material two-uniform-distribution one-straight-through four-way device and a control method.
Background
The existing belt conveyor conveys bulk materials, and the following three methods are adopted for uniformly and directly conveying the bulk materials through the head part of the belt conveyor:
1. as shown in figure 1, a branched bypass chute is arranged below the head part of the belt conveyor, one of the branched bypass chutes is directly conveyed to downstream equipment without being evenly divided, the other branched bypass chute is conveyed to a lower evenly divided buffer bin, the upper part of the evenly divided buffer bin is a communicating bin, the lower part of the evenly divided buffer bin is two discharge ports, and a quantitative feeding device is respectively arranged on the upper part and the lower part of the evenly divided buffer bin. Materials conveyed by the belt conveyor are stored in the buffer bin in a certain amount and then are conveyed to downstream equipment in proportion through the quantitative feeding devices below the two discharge ports of the buffer bin.
2. A vertical plate is arranged below the head of the belt conveyor along the center line of the belt conveyor, and the material flow is evenly divided into two parts along the width of the material flow. A common four-way distributor is arranged below the vertical plate to realize uniform distribution or direct feeding to downstream equipment.
3. A vertical plate is arranged in the middle of the belt conveyor in the material flow thickness direction, and the vertical plate is arranged under the head of the belt conveyor and is opposite to the material flow thickness direction of the belt conveyor. The stream is divided proportionally into two portions along the thickness of the stream. A common four-way distributor is arranged below the vertical plate to realize uniform distribution or direct feeding to downstream equipment.
The main problems of the existing two-equal straight-through four-way device for bulk materials are as follows: 1) in the first method for arranging the buffer bin, the upper branched bypass chute and the equal-dividing buffer bin occupy larger space, more required equipment is needed, and the buffer bin is easy to block materials; 2) the second method for equally dividing the material flow width is greatly influenced by the deviation of the belt conveyor, reduces the width of the material flow by half, and is unfavorable for the arrangement of downstream equipment and the utilization rate of the equipment. In addition, the occupied space in the vertical direction is large; 3) the third method for uniformly distributing the material flow thickness is greatly influenced by the non-uniform thickness of the bulk materials transported on the belt conveyor, has higher requirement on the upstream feeding proportionality, and has larger impact on the vertical plate by the materials and poorer stability and adjustability of the vertical plate. In addition, the occupied space in the vertical direction is large.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the two-equal one-straight-through four-way device for bulk materials and the control method thereof, which are not affected by deviation of a belt conveyor and unstable material flow thickness, ensure that the material flow width is unchanged from the original conveying width, shorten the space distance in the vertical direction, and realize remote control of two-equal one-straight-through four-way material distribution of the bulk materials when similar materials are conveyed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bulk material two-equal-distribution straight-through four-way device comprises an electro-hydraulic chute adjusting device, a four-way forked chute and an electro-hydraulic comb-shaped device; the electro-hydraulic chute adjusting device is arranged in a chute at the head of the belt conveyor and is positioned at the front part of the material flow advancing direction, the four-way branched chute is connected with the bottom of the chute at the head of the belt conveyor, and the electro-hydraulic comb-shaped device is arranged in the four-way branched chute and is positioned at the branch part of the four-way branched chute.
The electro-hydraulic comb-shaped device comprises a first comb-shaped plate, a second comb-shaped plate and an adjusting device, wherein one end of the first comb-shaped plate is provided with comb teeth corresponding to the second comb-shaped plate, and the other end of the first comb-shaped plate is hinged to a four-way forked chute; one end of the second comb plate is provided with comb teeth corresponding to the first comb plate, and the other end of the second comb plate is hinged on the four-way forked chute; the adjusting device is connected with the first comb-shaped plate and the second comb-shaped plate to adjust the included angle between the first comb-shaped plate and the second comb-shaped plate.
The adjusting device comprises L-shaped frames and a first electro-hydraulic push rod, the L-shaped frames are fixedly connected to two ends of the first electro-hydraulic push rod, the 2L-shaped frames are respectively and fixedly connected to a first comb-shaped plate and a second comb-shaped plate, and the included angle between the first comb-shaped plate and the second comb-shaped plate is adjusted through the extension and retraction of the first electro-hydraulic push rod.
The first comb plate and the second comb plate respectively comprise comb tooth parts and flat plate parts, comb teeth of the comb tooth parts of the first comb plate and the second comb plate are distributed in a staggered mode, when the material is divided into two parts, the comb teeth of the comb tooth parts of the first comb plate and the second comb plate are inserted together, and the first comb plate and the second comb plate form an X shape.
The flat plate part of the first comb-shaped plate and the flat plate part of the second comb-shaped plate are fixedly connected to the first supporting rotating shaft and the second supporting rotating shaft respectively, and the first supporting rotating shaft and the second supporting rotating shaft are installed on the bearing seat.
The electro-hydraulic chute adjusting device comprises a second electro-hydraulic push rod, a hinge bracket and a chute adjusting plate; the articulated frame is fixedly connected with two ends of the top of a chute at the head of the belt conveyor, a chute adjusting plate is articulated on the articulated frame through an articulated shaft, a base of a second electro-hydraulic push rod is fixedly connected on the chute at the head of the belt conveyor, and a push rod of the second electro-hydraulic push rod is fixedly connected on the chute adjusting plate.
The four-way forked chute is provided with two forked channels, the top of each forked channel is provided with an inlet channel, the bottom of each forked channel is provided with an outlet channel, the top of the four-way forked chute is fixedly connected to the bottom of the head chute of the belt conveyor, and the forked part is located in the middle of the head chute of the belt conveyor.
And the bifurcate part of the four-way bifurcate chute is provided with a cleaning door.
A bulk material two-average-distribution straight-through four-way distribution control method specifically comprises the following steps:
1) when the materials are directly passed through:
the first electro-hydraulic push rod is controlled to realize remote control of material distribution; the first electro-hydraulic push rod extends to enable the first comb plate and the second comb plate to be respectively and vertically attached to two side walls of a chute at the head of the belt conveyor, and flat plate parts of the first comb plate and the second comb plate respectively cover two chute outlets of two branched channels of the four-way branched chute, so that materials can directly pass through the chute;
2) the material is divided equally into two parts:
a. the first electro-hydraulic push rod is controlled to realize remote control of material distribution; the first electro-hydraulic push rod is shortened, so that comb teeth of the comb tooth parts of the first comb plate and the second comb plate are inserted together, and the first comb plate and the second comb plate form an X shape;
b. selecting the width, length and tooth spacing of comb teeth of the first comb plate and the second comb plate according to the property of conveyed materials;
c. the included angle between the first comb plate and the second comb plate is adjusted through the extension and retraction of the first electro-hydraulic push rod, so that the opening width of the included angle is larger than the thickness of the material, the angle value ensures that the material falls smoothly, and the remote control of material distribution is realized;
d. according to the speed and the conveying amount of the materials, the inclination angle of a chute adjusting plate of the electro-hydraulic flow adjusting assembly is adjusted through a second electro-hydraulic push rod, after the materials are fed, the thickness center of the material flow falls to be aligned to the cross part of the first comb-shaped plate and the second comb-shaped plate, and the remote control of material distribution is realized;
e. and c, respectively weighing each downstream material distribution amount through three scales, comparing the downstream material distribution amounts, and repeating the step c and the step d if the deviation amount is large until the material distribution amount is uniform.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention is not affected by the deviation of the belt conveyor and the unstable material flow thickness;
2) the material flow width and the original conveying width are equal;
3) the height space of the material distribution section is shortened;
4) the first electro-hydraulic push rod is controlled to realize remote control of material distribution; through the control to first electro-hydraulic push rod and second electro-hydraulic push rod stroke, realize the remote control to material evenly distributed.
Drawings
FIG. 1 is a schematic view of a bifurcated chute connected with a surge bin.
Fig. 2 is a schematic perspective view of the present invention.
Fig. 3 is a schematic perspective view of the present invention in two-equal working states.
Fig. 4 is a schematic perspective view of the working state of the present invention.
Fig. 5 is a schematic perspective structure view of the electro-hydraulic chute adjusting device.
FIG. 6 is a perspective view of the four-way diverging chute of the present invention.
Fig. 7 is a schematic perspective view of the electro-hydraulic comb device of the present invention.
Fig. 8 is a flow chart of the bulk material two-part process of the present invention.
In the figure: 1-electro-hydraulic chute adjusting device 2-four-way forked chute 3-electro-hydraulic comb device 4-belt conveyor head chute 5-scale 11-second electro-hydraulic push rod 12-hinged frame 13-chute adjusting plate 21-two forked channels 22-inlet channel 23-outlet channel 24-cleaning door 31-first comb plate 32-first comb plate 33-adjusting device 34-L-shaped frame 35-first electro-hydraulic push rod 36-comb part 37-flat plate part 38-first supporting rotating shaft 39-second supporting rotating shaft 40-bearing seat
Detailed Description
The following further illustrates embodiments of the invention, but is not intended to limit the scope thereof:
as shown in fig. 2-4, the two-equal-distribution straight-through four-way device for bulk materials comprises an electro-hydraulic chute adjusting device 1, a four-way forked chute 2 and an electro-hydraulic comb-shaped device 3.
The electro-hydraulic chute adjusting device 1 is installed in a belt conveyor head chute 4 and located in the front of the material flow advancing direction, the four-way forked chute 2 is connected with the bottom of the belt conveyor head chute 4, and the electro-hydraulic comb-shaped device 3 is installed in the four-way forked chute 2 and located at the forked position of the four-way forked chute 2.
As shown in fig. 5, the electro-hydraulic chute adjusting device 3 comprises a second electro-hydraulic push rod 11, a hinge bracket 12 and a chute adjusting plate 13; the articulated frame 12 is fixedly connected with two ends of the top of the chute 4 at the head of the belt conveyor, the chute adjusting plate 13 is articulated on the articulated frame 12 through an articulated shaft, the base of the second electro-hydraulic push rod 11 is fixedly connected with the chute 4 at the head of the belt conveyor, and the push rod of the second electro-hydraulic push rod 11 is fixedly connected with the chute adjusting plate 4. The second electro-hydraulic push rod 11 stretches and retracts to drive the chute adjusting plate 4 to rotate around the hinged shaft, and the inclination angle of the chute adjusting plate 4 is driven to change accordingly.
As shown in fig. 6, the four-way diverging chute 2 is provided with two diverging passages 21, the top of the two diverging passages 21 is provided with an inlet passage 22, the bottom is provided with an outlet passage 23, the top of the four-way diverging chute is fixedly connected to the bottom of the head chute of the belt conveyor, and the diverging position is located in the middle of the head chute of the belt conveyor. The branch part of the four-way branch chute 2 is provided with a cleaning door 24, and when foreign matters carried by materials are difficult to fall, the foreign matters can be removed by opening the cleaning door 24.
As shown in fig. 7, the electro-hydraulic comb 3 device includes a first comb plate 31, a second comb plate 32, and an adjusting device 33. The first comb plate 31 and the second comb plate 32 each include a comb tooth portion 36 and a flat plate portion 37, and comb teeth of the comb tooth portions 36 of the first comb plate 31 and the second comb plate 32 are distributed in a staggered manner. The flat plate portion 37 of the first comb plate 31 and the flat plate portion 37 of the second comb plate 32 are respectively fixed on the first support rotating shaft 38 and the second support rotating shaft 39, and two ends of the first support rotating shaft 38 and the second support rotating shaft 39 are mounted on the bearing seat 40.
The adjusting device 33 comprises an L-shaped frame 34 and a first electro-hydraulic push rod 35, the L-shaped frame 34 is fixedly connected to two ends of the first electro-hydraulic push rod 35, 2L-shaped frames 34 are respectively fixedly connected to bottoms of flat plate portions 37 of the first comb plate 31 and the second comb plate 32, and the included angle between the first comb plate 31 and the second comb plate 32 is adjusted through extension and retraction of the first electro-hydraulic push rod 35.
A bulk material two-average-distribution straight-through four-way distribution control method specifically comprises the following steps:
1. when the materials are directly passed through:
as shown in fig. 4, when the material passes through directly, the first comb plate 31 and the second comb plate 32 respectively vertically cling to two side walls of the head chute 4 of the belt conveyor, and the flat plate portions 37 of the first comb plate 31 and the second comb plate 32 respectively cover two chute outlets of the two bifurcated channels 21 of the four-way bifurcated chute 2. The invention realizes the remote control of material distribution by controlling the first electro-hydraulic push rod 35.
2. As shown in fig. 3, 7 and 8, a method for controlling the two-average distribution of bulk materials specifically includes the following steps:
1) the width, length and tooth spacing of the teeth 36 of the first and second comb plates 31 and 32 are selected according to the nature of the conveyed material.
2) As shown in fig. 3, when the material is divided into two parts, the comb teeth of the comb teeth 36 of the first comb plate 31 and the second comb plate 32 are inserted together, and the first comb plate 31 and the second comb plate 32 form an X shape. The included angle between the first comb plate 31 and the second comb plate 32 is adjusted by the extension and contraction of the first electro-hydraulic push rod 35. When the material is divided into two parts, the opening width of the included angle is larger than the thickness of the material, and the angle value ensures that the material falls smoothly. Through the control of first electro-hydraulic push rod 35 stroke, realize the remote control to material evenly distributed.
3) According to the speed and the conveying amount of the materials, the inclination angle of a chute adjusting plate 13 of the electro-hydraulic chute adjusting device 1 is adjusted through a second electro-hydraulic push rod 11, and after the materials are fed, the thickness center of the material flow falls to be aligned with the intersection part of the first comb plate 31 and the second comb plate 32. And the remote control of uniform distribution of materials is realized by controlling the stroke of the second electro-hydraulic push rod 11.
4) And (3) respectively weighing the downstream material distribution amount by using three scales 5, comparing the downstream material distribution amount, and repeating the step 2) and the step 3) if the deviation amount is large until the material distribution amount is uniform.
The invention is not affected by the deviation of the belt conveyor and the unstable material flow thickness; the material flow width and the original conveying width are equal; the height space of the material distribution section is shortened; the first electro-hydraulic push rod is controlled to realize remote control of material distribution; through the control to first electro-hydraulic push rod and second electro-hydraulic push rod stroke, realize the remote control to material evenly distributed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A bulk material two-equal-distribution straight-through four-way device is characterized by comprising an electro-hydraulic chute adjusting device, a four-way forked chute and an electro-hydraulic comb-shaped device; the electro-hydraulic chute adjusting device is arranged in a chute at the head of the belt conveyor and is positioned at the front part of the material flow advancing direction, the four-way branched chute is connected with the bottom of the chute at the head of the belt conveyor, and the electro-hydraulic comb-shaped device is arranged in the four-way branched chute and is positioned at the branch part of the four-way branched chute;
the electro-hydraulic comb-shaped device comprises a first comb-shaped plate, a second comb-shaped plate and an adjusting device, wherein one end of the first comb-shaped plate is provided with comb teeth corresponding to the second comb-shaped plate, and the other end of the first comb-shaped plate is hinged to a four-way forked chute; one end of the second comb plate is provided with comb teeth corresponding to the first comb plate, and the other end of the second comb plate is hinged on the four-way forked chute; the adjusting device is connected with the first comb-shaped plate and the second comb-shaped plate to adjust the included angle between the first comb-shaped plate and the second comb-shaped plate.
2. The bulk material two-equal-distribution straight-through four-way device according to claim 1, wherein the adjusting device comprises L-shaped frames and a first electro-hydraulic push rod, the L-shaped frames are fixedly connected to two ends of the first electro-hydraulic push rod, 2L-shaped frames are respectively fixedly connected to the first comb-shaped plate and the second comb-shaped plate, and the included angle between the first comb-shaped plate and the second comb-shaped plate is adjusted through the extension and retraction of the first electro-hydraulic push rod.
3. The bulk material two-equal-part straight-through four-way device according to claim 1, wherein the first comb plate and the second comb plate respectively comprise comb teeth parts and flat plate parts, comb teeth of the comb teeth parts of the first comb plate and the second comb plate are distributed in a staggered mode, when the materials are divided into two parts, the comb teeth of the comb teeth parts of the first comb plate and the second comb plate are inserted together, and the first comb plate and the second comb plate form an X shape.
4. A bulk material two-part straight-through four-way device according to claim 3, wherein the flat plate portions of the first and second comb-shaped plates are respectively and fixedly connected to a first supporting rotating shaft and a second supporting rotating shaft, and the first supporting rotating shaft and the second supporting rotating shaft are mounted on the bearing seat.
5. The bulk material two-part straight-through four-way device according to claim 1, wherein the electro-hydraulic chute adjusting device comprises a second electro-hydraulic push rod, a hinged bracket and a chute adjusting plate; the articulated frame is fixedly connected with two ends of the top of a chute at the head of the belt conveyor, a chute adjusting plate is articulated on the articulated frame through an articulated shaft, a base of a second electro-hydraulic push rod is fixedly connected on the chute at the head of the belt conveyor, and a push rod of the second electro-hydraulic push rod is fixedly connected on the chute adjusting plate.
6. A bulk material two-split straight-through four-way device according to claim 1, wherein the four-way diverging chute is provided with two diverging channels, the top of the two diverging channels is provided with an inlet channel, the bottom is provided with an outlet channel, the top of the four-way diverging chute is fixedly connected to the bottom of the head chute of the belt conveyor, and the diverging position is positioned in the middle of the head chute of the belt conveyor.
7. A bulk material two-part straight-through four-way device according to claim 6, wherein the bifurcate portion of the four-way bifurcate chute is provided with a cleaning door.
8. A material distribution control method based on the device of claim 1, 2, 3, 4, 5, 6 or 7, which is characterized by comprising the following steps:
1) when the materials are directly passed through:
the first electro-hydraulic push rod is controlled to realize remote control of material distribution; the first electro-hydraulic push rod extends to enable the first comb plate and the second comb plate to be respectively and vertically attached to two side walls of a chute at the head of the belt conveyor, and flat plate parts of the first comb plate and the second comb plate respectively cover two chute outlets of two branched channels of the four-way branched chute, so that materials can directly pass through the chute;
2) the material is divided equally into two parts:
a. the first electro-hydraulic push rod is controlled to realize remote control of material distribution; the first electro-hydraulic push rod is shortened, so that comb teeth of the comb tooth parts of the first comb plate and the second comb plate are inserted together, and the first comb plate and the second comb plate form an X shape;
b. selecting the width, length and tooth spacing of comb teeth of the first comb plate and the second comb plate according to the property of conveyed materials;
c. the included angle between the first comb plate and the second comb plate is adjusted through the extension and retraction of the first electro-hydraulic push rod, so that the opening width of the included angle is larger than the thickness of the material, the angle value ensures that the material falls smoothly, and the remote control of material distribution is realized;
d. according to the speed and the conveying amount of the materials, the inclination angle of a chute adjusting plate of the electro-hydraulic flow adjusting assembly is adjusted through a second electro-hydraulic push rod, after the materials are fed, the thickness center of the material flow falls to be aligned to the cross part of the first comb-shaped plate and the second comb-shaped plate, and the remote control of material distribution is realized;
e. and c, respectively weighing each downstream material distribution amount through three scales, comparing the downstream material distribution amounts, and repeating the step c and the step d if the deviation amount is large until the material distribution amount is uniform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010065192.XA CN111153174A (en) | 2020-01-20 | 2020-01-20 | Bulk material two-equal-division one-pass four-way device and control method |
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| CN202010065192.XA CN111153174A (en) | 2020-01-20 | 2020-01-20 | Bulk material two-equal-division one-pass four-way device and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115043180A (en) * | 2022-05-25 | 2022-09-13 | 华能伊敏煤电有限责任公司 | Flow-dividing type hydraulic spile door protection device |
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| CN206318429U (en) * | 2016-12-09 | 2017-07-11 | 煤炭工业郑州设计研究院股份有限公司 | A kind of sub-material anti-crushing bifurcated chute |
| CN206336736U (en) * | 2016-12-29 | 2017-07-18 | 铜陵天奇蓝天机械设备有限公司 | A kind of turnover plate type four-way switches funnel |
| CN211768649U (en) * | 2020-01-20 | 2020-10-27 | 中冶焦耐(大连)工程技术有限公司 | Two-equal-division straight-through four-way device for bulk materials |
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| CN115043180A (en) * | 2022-05-25 | 2022-09-13 | 华能伊敏煤电有限责任公司 | Flow-dividing type hydraulic spile door protection device |
| CN115043180B (en) * | 2022-05-25 | 2023-11-03 | 华能伊敏煤电有限责任公司 | But split-flow type hydraulic plugboard door protector |
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