Hydraulic slag pushing device for slag well of coal-fired boiler

Abstract

A hydraulic slag pushing device for a slag well of a coal-fired boiler comprises a slag pushing pipe which is horizontally or obliquely installed on the slag well and provided with a pipe body flange plate and a bottom hole, a high-temperature-resistant slag pushing head which corresponds to the horizontal or downward oblique installation of the slag pushing pipe and is installed in the slag pushing pipe, and a rotating riding wheel installed at the bottom of the slag pushing pipe. The flange cover is connected to the pipe body flange plate through a fastening bolt, the hydraulic cylinder body is used for connecting the cylinder body flange plate to the flange cover through a fastening bolt, and the hydraulic piston rod is hinged to the high-temperature-resistant slag pushing head. The device is large in thrust, reliable in connection, stable in operation, high in production efficiency, time-saving and labor-saving, low in labor intensity of operators, good in slag dredging effect, safe and reliable in operation and convenient to mount and dismount, and effectively solves the problems of slag accumulation, slag fluffing and slag blockage in a slag well. The deslagging device can be widely applied to the deslagging process of the coal-fired boiler slag well.

Description

Technical Field

[0001] The invention relates to a hydraulic slag pushing device for a slag pit of a coal-fired boiler, which can be widely used in the slag discharge process of the slag pit of a coal-fired boiler. Background Art

[0002] The existing coal-fired boiler slag well discharge system, on the one hand, sometimes the slag well outlet shut-off door needs to be closed to store slag, but often when the slag storage is completed and the shut-off door needs to be opened, the slag well cannot discharge slag normally. Second, during the operation of the coal-fired boiler slag well discharge system, the slag in the slag well accumulates due to slag coking and cannot be discharged normally, resulting in slag accumulation, slag bloating and slag blockage in the slag well. If the slag well cannot be discharged in time, it may cause the boiler to shut down in serious cases, and the boiler operation safety is poor.

[0003] In addition, when the slag pit is blocked by slag, manual slag removal is often adopted, which has low production efficiency, is time-consuming and labor-intensive, and the high-temperature slag will endanger the personal safety of the operators. Summary of the invention

[0004] The purpose of the present invention is to provide a hydraulic slag pushing device for a slag pit of a coal-fired boiler, which has large thrust, reliable connection, stable operation, high production efficiency, time and labor saving, low labor intensity for operators, good slag clearing effect, safe and reliable operation, convenient installation and disassembly, and can effectively solve the problems of slag accumulation, slag overflow and slag blockage in the slag pit.

[0005] In order to achieve the above-mentioned purpose, the hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention comprises a slag pushing pipe which is installed horizontally or tilted downward on the slag pit, has a pipe body flange and is provided with a bottom hole, a high-temperature resistant slag pushing head which is installed inside the slag pushing pipe and is matched with the clearance of the slag pushing pipe and can move back and forth, and is located below the bottom hole of the slag pushing pipe and is installed on the bottom of the slag pushing pipe. The rotating support wheel which supports the sliding of the high-temperature resistant slag pushing head through the bottom hole of the slag pushing pipe, a flange cover which is connected to the pipe body flange by fastening bolts, and has a cylinder flange. A hydraulic cylinder body having a plate and a cylinder flange plate connected to the flange cover by fastening bolts, a hydraulic piston rod installed inside the hydraulic cylinder body and hingedly connected to the high-temperature resistant slag pushing head, a hydraulic pump station providing power, a control cabinet, a first hydraulic oil pipe and a second hydraulic oil pipeline connected to the hydraulic pump station at one end, an electromagnetic reversing valve connected to the other ends of the first hydraulic oil pipeline and the second hydraulic oil pipeline and used for switching the hydraulic oil pipelines, a third hydraulic oil pipeline and a fourth hydraulic oil pipeline connected to the electromagnetic reversing valve at one end and connected to the hydraulic cylinder body at the other end.

[0006] The invention discloses a hydraulic slag pushing device for a slag pit of a coal-fired boiler. The slag pushing pipe and the high-temperature resistant slag pushing head are clearance-matched. When the slag pushing pipe is a circular pipe, the high-temperature resistant slag pushing head is cylindrical.

[0007] The invention discloses a hydraulic slag pushing device for a slag pit of a coal-fired boiler. The slag pushing pipe and the high temperature resistant slag pushing head are clearance matched. When the slag pushing pipe is a rectangular pipe, the high temperature resistant slag pushing head is a rectangular column.

[0008] The invention relates to a hydraulic slag pushing device for a slag pit of a coal-fired boiler, wherein the high temperature resistant slag pushing head has an inclination angle of 0 to 15 degrees with the horizontal plane.

[0009] The invention relates to a hydraulic slag pushing device for a slag pit of a coal-fired boiler, wherein the high-temperature resistant slag pushing head has a head which is parallel to an inner wall of one side of the slag pit.

[0010] The invention discloses a hydraulic slag pushing device for a slag pit of a coal-fired boiler. The hydraulic piston rod is hingedly connected to the high-temperature resistant slag pushing head, which is a convex-concave connection and is fastened together by a fastener.

[0011] The invention discloses a hydraulic slag pushing device for a slag pit of a coal-fired boiler. The hydraulic piston rod is connected to a high temperature resistant slag pushing head by means of a convex-concave connection. The hydraulic piston rod has a convex connection end and the high temperature resistant slag pushing head has a concave connection part.

[0012] The invention discloses a hydraulic slag pushing device for a slag pit of a coal-fired boiler, wherein the electromagnetic reversing valve is provided with a hydraulic locking function to prevent the hydraulic cylinder from malfunctioning due to external force.

[0013] The hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention, the rotating supporting wheel is a rolling wheel.

[0014] The hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention has the following working principles: (1) The hydraulic pump station starts and provides hydraulic oil with sufficient pressure as power. At this time, the electromagnetic reversing valve is in the initial state. The hydraulic oil enters the left side of the hydraulic cylinder through the first hydraulic oil pipeline and the third hydraulic oil pipeline, driving the hydraulic piston rod forward to the right, thereby driving the high-temperature resistant slag pushing head forward. At this time, the hydraulic oil flows back to the hydraulic pump station through the fourth hydraulic oil pipeline and the second hydraulic oil pipeline. In this way, the hydraulic piston rod performs the extension action, pushing the high-temperature resistant slag pushing head forward, entering the slag pit to push the slag, and completing the slag pushing work.

[0015] (2) When the control cabinet receives the signal that the high-temperature resistant slag pushing head has reached the end of its stroke, the slag pushing stroke ends and a return signal is issued to automatically control the electromagnetic reversing valve to operate. The hydraulic oil enters the right side of the hydraulic cylinder through the first hydraulic oil pipeline and the fourth hydraulic oil pipeline, driving the hydraulic piston rod to return to the left, thereby driving the high-temperature resistant slag pushing head to return. At this time, the hydraulic oil flows back to the hydraulic pump station through the third hydraulic oil pipeline and the second hydraulic oil pipeline. In this way, the hydraulic piston rod performs a return action, and the hydraulic piston rod drives the high-temperature resistant slag pushing head back to the initial position, completing a working cycle.

[0016] The invention discloses a hydraulic slag pushing device for a slag pit of a coal-fired boiler. The hydraulic piston rod and the high-temperature resistant slag pushing head adopt an articulated flexible connection structure, and further adopt a convex-concave connection structure to eliminate rigid impact, ensure reliable connection, and operate smoothly.

[0017] The invention discloses a hydraulic slag pushing device for a slag pit of a coal-fired boiler. The rotating supporting wheel is installed at the lower part of a slag pushing pipe. A bottom hole is provided on the slag pushing pipe. The rotating supporting wheel passes through the bottom hole of the slag pushing pipe to support a high-temperature resistant slag pushing head to slide, thereby preventing the high-temperature resistant slag pushing head from getting stuck and reducing component wear.

[0018] The hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention adopts a flange plate and an articulated connection mode, and is convenient to install and disassemble.

[0019] Compared with the traditional manual dredging of slag wells, the hydraulic slag pushing device for coal-fired boilers of the present invention has the following beneficial effects: the present invention adopts a hydraulically driven high-temperature resistant slag pushing head to dredge the slag, which has a large thrust, is convenient to dredge, dredges the slag quickly, has high production efficiency, saves time and effort, and has low labor intensity for operators. In particular, when the high-temperature resistant slag pushing head is installed at an angle, a downward thrust component is generated, which has a better effect of dredging the slag, thereby effectively solving the problems of slag accumulation, slag bulging, and slag blockage in the slag well. In addition, since the hydraulically driven high-temperature resistant slag pushing head dredges the slag in a timely and rapid manner, it will not cause the boiler to shut down, and therefore, the operation is safe and reliable.

[0020] In summary, the hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention has large thrust, reliable connection, stable operation, high production efficiency, time and labor saving, low labor intensity for operators, good slag clearing effect, safe and reliable operation, easy installation and disassembly, and effectively solves the problems of slag accumulation, slag overflow and slag blockage in the slag pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments thereof.

[0022] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0023] exist Figure 1The invention discloses a hydraulic slag pushing device for a slag well of a coal-fired boiler, comprising a hydraulic slag pushing device for a slag well of a coal-fired boiler, comprising a slag pushing pipe 1 which is installed horizontally or tilted downward on a slag well 14, has a pipe body flange 1-1 and is provided with a bottom hole p, a high-temperature resistant slag pushing head 2 which is installed inside the slag pushing pipe and is in clearance fit with the slag pushing pipe and can reciprocate, corresponding to the horizontal or tilted installation of the slag pushing pipe, is installed inside the slag pushing pipe and is in clearance fit with the slag pushing pipe, a rotating support wheel 3 which is located below the bottom hole of the slag pushing pipe and is installed on the bottom of the slag pushing pipe and supports the sliding of the high-temperature resistant slag pushing head through the bottom hole p of the slag pushing pipe, a flange cover 4 which is connected to the pipe body flange by fastening bolts, and has a cylinder A hydraulic cylinder body 5 having a body flange 5-1, and the cylinder body flange is connected to the flange cover by fastening bolts, a hydraulic piston rod 6 installed inside the hydraulic cylinder body and hingedly connected to the high-temperature resistant slag pushing head, a hydraulic pump station 7 providing power, a control cabinet 8, a first hydraulic oil pipe 9 and a second hydraulic oil pipeline 10 connected to the hydraulic pump station at one end, an electromagnetic reversing valve 11 connected to the other ends of the first hydraulic oil pipeline and the second hydraulic oil pipeline and used for switching the hydraulic oil pipelines, a third hydraulic oil pipeline 12 and a fourth hydraulic oil pipeline 13 connected to the electromagnetic reversing valve at one end and the hydraulic cylinder body at the other end.

[0024] The hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention has a clearance fit between the slag pushing pipe 1 and the high temperature resistant slag pushing head 2. When the slag pushing pipe is a circular pipe, the high temperature resistant slag pushing head is cylindrical.

[0025] The hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention has a clearance fit between the slag pushing pipe 1 and the high temperature resistant slag pushing head 2. When the slag pushing pipe is a rectangular pipe, the high temperature resistant slag pushing head is a rectangular column.

[0026] The hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention has a high temperature resistant slag pushing head 2, and an inclination angle α with the horizontal plane is 0-15°.

[0027] The hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention comprises a high temperature resistant slag pushing head 2, the head of which is parallel to the inner wall of one side of the slag pit.

[0028] The invention discloses a hydraulic slag pushing device for a slag pit of a coal-fired boiler. The hydraulic piston rod is hingedly connected to the high-temperature resistant slag pushing head, which is a convex-concave connection and is fastened together by a fastener.

[0029] The hydraulic slag pushing device for a slag pit of a coal-fired boiler of the present invention has a convex-concave connection between the hydraulic piston rod and the high-temperature resistant slag pushing head. The hydraulic piston rod 6 has a convex head m at its connecting end, and the high-temperature resistant slag pushing head 2 has a concave connecting part n.

[0030] In the hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention, the electromagnetic reversing valve 11 is provided with a hydraulic locking function to prevent the hydraulic cylinder from malfunctioning due to external force.

[0031] In the hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention, the rotating supporting wheel 3 is a rolling wheel.

[0032] also, Figure 1 In the process, the initial position u of the high temperature resistant slag pushing head is flush with the inner wall of one side of the slag pit; the end position v of the stroke is close to the inner wall of the other side of the slag pit.

[0033] The hydraulic slag pushing device for the slag pit of a coal-fired boiler of the present invention has the following working process: (1) The hydraulic pump station starts and provides hydraulic oil with sufficient pressure as power. At this time, the electromagnetic reversing valve is in the initial state. Under the electromagnetic action, the oil port c is connected to the oil port e, and the oil port d is connected to the oil port f. The hydraulic oil enters through the oil port a→c→e→g, and the hydraulic oil enters the left side of the hydraulic cylinder through the first hydraulic oil pipeline and the third hydraulic oil pipeline, driving the hydraulic piston rod forward to the right, thereby driving the high-temperature resistant slag pushing head forward. At this time, the hydraulic oil returns through the oil port h→f→d→b, and the hydraulic oil flows back to the hydraulic pump station through the fourth hydraulic oil pipeline and the second hydraulic oil pipeline. In this way, the hydraulic piston rod performs the extension action, pushing the high-temperature resistant slag pushing head forward, entering the slag well to push the slag, and completing the slag pushing work.

[0034] (2) When the control cabinet receives the signal that the high-temperature resistant slag pushing head has reached the end of its stroke, the slag pushing stroke ends and a return signal is issued to automatically control the electromagnetic reversing valve to operate. At this time, under the electromagnetic action, the oil ports c and f of the electromagnetic reversing valve are connected, and the oil ports d and e are connected. The hydraulic oil enters through the oil ports a→c→f→h, and the hydraulic oil enters the right side of the hydraulic cylinder through the first hydraulic oil pipeline and the fourth hydraulic oil pipeline, driving the hydraulic piston rod to return to the left, thereby driving the high-temperature resistant slag pushing head to return. At this time, the hydraulic oil returns through the oil ports g→e→d→b, and the hydraulic oil flows back to the hydraulic pump station through the third hydraulic oil pipeline and the second hydraulic oil pipeline. In this way, the hydraulic piston rod performs a return action, and the hydraulic piston rod drives the high-temperature resistant slag pushing head back to the initial position, completing a working cycle.

[0035] The hydraulic slag pushing device for the slag well of a coal-fired boiler of the present invention is only described above as a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement of the above embodiments made according to the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A hydraulic slag pushing device for a coal-fired boiler slag pit, characterized in that: The invention comprises a slag pushing pipe which is installed on the slag pit horizontally or downwardly inclined, has a pipe body flange and is provided with a bottom hole, a high-temperature resistant slag pushing head which is installed inside the slag pushing pipe and is matched with the clearance of the slag pushing pipe and can move back and forth, corresponding to the horizontal or downward inclined installation of the slag pushing pipe, a rotating supporting wheel which is located below the bottom hole of the slag pushing pipe and is installed on the bottom of the slag pushing pipe and supports the sliding of the high-temperature resistant slag pushing head through the bottom hole of the slag pushing pipe, a flange cover which is connected to the pipe body flange by fastening bolts, a hydraulic cylinder body which has a cylinder body flange and connects the cylinder body flange to the flange cover by fastening bolts, a hydraulic piston rod which is installed inside the hydraulic cylinder body and is hingedly connected to the high-temperature resistant slag pushing head, a hydraulic pump station which provides power, a control cabinet, a first hydraulic oil pipe and a second hydraulic oil pipeline which are connected to the hydraulic pump station at one end, an electromagnetic reversing valve which is connected to the other end of the first hydraulic oil pipeline and the second hydraulic oil pipeline and is used to switch the hydraulic oil pipelines, a third hydraulic oil pipeline and a fourth hydraulic oil pipeline which are connected to the electromagnetic reversing valve at one end and to the hydraulic cylinder body at the other end.

2. The hydraulic slag pushing device for coal-fired boiler slag pit according to claim 1 is characterized in that: The clearance between the slag pushing pipe and the high temperature resistant slag pushing head is matched. When the slag pushing pipe is a circular pipe, the high temperature resistant slag pushing head is cylindrical.

3. The hydraulic slag pushing device for coal-fired boiler slag pit according to claim 1 is characterized in that: The clearance between the slag pushing pipe and the high temperature resistant slag pushing head is matched. When the slag pushing pipe is a rectangular pipe, the high temperature resistant slag pushing head is a rectangular column.

4. The hydraulic slag pushing device for coal-fired boiler slag pit according to claim 1 is characterized in that: The high temperature resistant slag pushing head has an inclination angle of 0 to 15° with the horizontal plane.

5. The hydraulic slag pushing device for coal-fired boiler slag pit according to claim 1 is characterized in that: The head of the high temperature resistant slag pushing head is parallel to the inner wall of one side of the slag pit.

6. The hydraulic slag pushing device for coal-fired boiler slag pit according to claim 1, characterized in that: The hinged connection between the hydraulic piston rod and the high temperature resistant slag pushing head is a convex-concave connection and is fastened together by a fastener.

7. The hydraulic slag pushing device for coal-fired boiler slag pit according to claim 6, characterized in that: The hydraulic piston rod is connected to the high temperature resistant slag pushing head in a convex-concave manner. The connection end of the hydraulic piston rod is a convex head, and the connection part of the high temperature resistant slag pushing head is a concave one.

8. The hydraulic slag pushing device for coal-fired boiler slag pit according to claim 1, characterized in that: The electromagnetic reversing valve is equipped with a hydraulic lock function to prevent the hydraulic cylinder from malfunctioning due to external forces.

9. The hydraulic slag pushing device for coal-fired boiler slag pit according to claim 1, characterized in that: The rotating supporting wheel is a rolling wheel.

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