A long telescopic sootblower inner tube connector

Abstract

The utility model relates to a long telescopic soot blower inner tube connecting piece, relate to soot blower structure design field, including with the first connecting piece of speed reducer connection and with the second connecting piece of lifting valve inner tube connection, the first connecting piece with the second connecting piece intercommunication and can detachable connection, through detachable connection of first connecting piece and second connecting piece, when the breakdown of speed reducer needs to disassemble and overhaul in operation, only need to detach from the second connecting piece first connecting piece, can directly take down speed reducer from the walking track and disassemble and overhaul, convenient and fast, save time and effort, greatly improve work efficiency, ensure that boiler safe and stable operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of sootblower structure design, and specifically relates to a long telescopic sootblower inner tube connector. Background Technology

[0002] The boiler telescopic soot blower is an auxiliary device in thermal power plants to ensure the stable operation of boilers. Its function is to clean the heating surfaces of boilers after long-term operation, as ash and coke will accumulate on the heating surfaces, which will deteriorate the heat transfer. For the boiler tail flue, the long-term accumulation of combustibles may also cause serious accidents of re-combustion. Therefore, after the boiler has been running for a period of time, the heating surfaces need to be cleaned by soot blowing.

[0003] Boiler steam sootblowers are divided into two types: short steam sootblowers and long telescopic sootblowers. The long telescopic sootblower has a 6-meter-long sootblowing gun tube and is mainly used for soot blowing on the heating surfaces of superheaters and reheaters. Due to prolonged operation, the reducer is prone to malfunction. In case of malfunction, the reducer must be disassembled from the travel rail for repair. Normally, the reducer can be directly pulled out of the steam inner pipe. However, because the diameter of the reducer's packing gland (42mm) is smaller than the diameter of the connection between the inner steam pipe and the lifting valve (60mm), the approximately 6-meter-long sootblowing gun tube must be removed before the reducer can be removed from the travel rail for repair. The limited distance between the tail of the sootblower and the furnace wall (only one meter) restricts the removal of the approximately 6-meter-long sootblowing gun tube. Furthermore, during boiler operation, if the long telescopic sootblower is extended into the high-temperature furnace for an extended period of time without steam being introduced for maintenance, its barrel will deform and be damaged, thus failing to meet the on-site maintenance requirements and causing certain difficulties for maintenance work.

[0004] Therefore, in response to the above-mentioned technical problems, the design of the inner tube connector of the long telescopic sootblower is carried out to ensure convenient disassembly and maintenance of the reducer. At the same time, it can also solve the problem that the inability to repair the sootblower in time when it malfunctions, resulting in the sootblower being unable to blow soot for a long time, is a serious hidden danger to the stable operation of the boiler. This is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a long telescopic sootblower inner tube connector, ensuring convenient disassembly and maintenance of the reducer. It also solves the problem of the sootblower being unable to perform soot blowing for extended periods due to malfunctions, which poses a serious threat to the stable operation of the boiler.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] A long telescopic sootblower inner tube connector includes a first connector connected to a speed reducer and a second connector connected to the inner tube of a lifting valve. The first connector and the second connector are connected in communication and are detachably connected.

[0008] Preferably, the first connecting member and the second connecting member are respectively provided with a first connecting structure and a second connecting structure. The first connecting structure is a first flange provided on the first connecting member, and the second connecting structure is a second flange provided on the second connecting member. The first flange and the second flange are connected by bolts.

[0009] Preferably, the first flange has four first through holes evenly distributed in the circumferential direction, and the second flange has a second through hole that mates with the first through holes in the circumferential direction. The first through holes and the second through holes are connected by the bolts.

[0010] Preferably, the first flange is threadedly connected to the first connector, and the second flange is integrally formed with the second connector.

[0011] Preferably, the inner wall of the first flange is provided with an internal thread, and the outer wall of the first connector is provided with an external thread that mates with the internal thread.

[0012] Preferably, the inner wall of the second connector has a first connecting hole and a second connecting hole, the first connecting hole is located close to the inner tube of the lifting valve, the inner diameter of the second connecting hole is larger than the inner diameter of the first connecting hole, and the inner wall of the first connector has a third connecting hole, the inner diameter of the third connecting hole is equal to the inner diameter of the first connecting hole.

[0013] Preferably, the first connector extends out of the first flange, and the outer diameter of the extended end of the first connector is smaller than the inner diameter of the second connecting hole, and the extended end is inserted into the second connecting hole.

[0014] Preferably, the difference between the inner diameter of the second connecting hole and the outer diameter of the protruding end is 0.1 mm to 1.5 mm.

[0015] Preferably, a washer is provided in the second connecting hole, the outer diameter of the washer being smaller than the inner diameter of the second connecting hole and larger than the inner diameter of the first connecting hole, and the inner diameter of the washer being equal to the inner diameter of the first connecting hole.

[0016] Preferably, the diameter of the first connecting hole near the end of the inner tube of the lifting valve gradually increases in the direction towards the inner tube of the lifting valve.

[0017] The present invention achieves the following technical advantages over the prior art:

[0018] By detachably connecting the first and second connecting parts, when the reducer malfunctions during operation and needs to be disassembled for maintenance, simply remove the first connecting part from the second connecting part to directly remove the reducer from the travel rail for disassembly and maintenance. This is convenient, quick, time-saving, labor-saving, and greatly improves work efficiency, ensuring the safe and stable operation of the boiler. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Appendix Figure 1 This is a schematic diagram of the overall structure of the inner tube connector of the long telescopic soot blower disclosed in the embodiment of this utility model.

[0021] Appendix Figure 2 This is a schematic diagram of the first flange and bolt structure of the inner tube connector of the long telescopic sootblower disclosed in the embodiment of this utility model.

[0022] Appendix Figure 3 This is a schematic diagram of the overall structure of the long telescopic sootblower inner tube connector after assembly, as disclosed in the embodiment of this utility model.

[0023] Among them, 1. second connecting piece; 2. second flange; 3. first flange; 4. first connecting piece; 5. third connecting hole; 6. protruding end; 7. second connecting hole; 8. first connecting hole; 9. bolt; 10. first through hole; 11. external thread. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The purpose of this utility model is to provide a long telescopic sootblower inner tube connector, which ensures convenient disassembly and maintenance of the reducer, and can also solve the problem that the sootblower cannot blow soot for a long time due to failure to repair it in time, which poses a serious hidden danger to the stable operation of the boiler.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] refer to Figure 1 The telescopic sootblower inner tube connector disclosed in this embodiment of the present invention includes at least a first connector 4 connected to the reducer and a second connector 1 connected to the inner tube of the lifting valve. The inner tube of the sootblower is connected to the reducer through the lifting valve. The first connector 4 and the second connector 1 are connected and detachably connected. By detachably connecting the first connector 4 and the second connector 1, when the reducer malfunctions during operation and needs to be disassembled for maintenance, the first connector 4 can be removed from the second connector 1, and the reducer can be directly removed from the travel rail for disassembly and maintenance. This is convenient, quick, time-saving, labor-saving, and greatly improves work efficiency, ensuring the safe and stable operation of the boiler.

[0028] It should be noted that the first connecting piece 4 is welded to the reducer, and the second connecting piece 1 is welded to the inner pipe of the lifting valve.

[0029] refer to Figure 1 and Figure 2 In one embodiment, the first connecting member 4 and the second connecting member 1 are respectively provided with a first connecting structure and a second connecting structure. The first connecting structure is a first flange 3 provided on the first connecting member 4, and the second connecting structure is a second flange 2 provided on the second connecting member 1. The first flange 3 and the second flange 2 are connected by bolts 9. The first flange 3 and the second flange 2 are connected by bolts 9 and nuts, which generate a preload to press the first flange 3 and the second flange 2 together to form a rigid interface that can transmit loads and resist shear forces. When connected, the axial force applied by the bolts 9 makes the flange surfaces fit tightly together, reducing the risk of medium leakage.

[0030] refer to Figure 1 and Figure 2 In one embodiment, the first flange 3 is provided with four first through holes 10 evenly distributed in the circumferential direction, and the second flange 2 is provided with a second through hole that mates with the first through holes 10 in the circumferential direction. The first through holes 10 and the second through holes are connected by bolts 9. The four-hole evenly distributed structure makes the load of the bolts 9 axially symmetrically distributed, which can effectively reduce the risk of deflection of the first flange 3 and the second flange 2 and avoid sealing failure caused by stress concentration on one side.

[0031] refer to Figure 1 and Figure 3 In one implementation, the first flange 3 is threadedly connected to the first connector 4, and the second flange 2 and the second connector 1 are integrally formed. Since the first connector 4 is connected to the reducer, the first flange 3 is threadedly connected to the first connector 4. After the reducer is removed, the first flange 3 can also be removed, avoiding the reduction of maintenance efficiency due to the obstruction of the first flange 3 when the reducer is being repaired.

[0032] refer to Figure 1and Figure 3 In one embodiment, the inner wall of the first flange 3 is provided with an internal thread, and the outer wall of the first connector 4 is provided with an external thread 11 that mates with the internal thread.

[0033] refer to Figure 1 In one embodiment, the inner wall of the second connector 1 is provided with a first connecting hole 8 and a second connecting hole 7. The first connecting hole 8 is located close to the inner tube of the lift valve, and the inner diameter of the second connecting hole 7 is larger than the inner diameter of the first connecting hole 8. The inner wall of the first connector 4 is provided with a third connecting hole 5, and the inner diameter of the third connecting hole 5 is equal to the inner diameter of the first connecting hole 8. The variable cross-section structure between the second connecting hole 7 and the third connecting hole 5 can guide the steam flow direction and reduce the formation of turbulent zones.

[0034] refer to Figure 1 In one embodiment, the first connector 4 extends out of the first flange 3. The outer diameter of the protruding end 6 of the first connector 4 is smaller than the inner diameter of the second connecting hole 7. The protruding end 6 is inserted into the second connecting hole 7. The smaller outer diameter of the protruding end 6 of the first connector 4 than the inner diameter of the second connecting hole 7 forms an assembly gap, which can compensate for manufacturing tolerances and installation alignment errors, avoid component deformation caused by forced assembly, and guide the assembly process by inserting the protruding end 6 into the second connecting hole 7, thereby improving assembly efficiency.

[0035] refer to Figure 1 In one embodiment, the difference between the inner diameter of the second connecting hole 7 and the outer diameter of the protruding end 6 is 0.1 mm to 1.5 mm.

[0036] refer to Figure 1 In one embodiment, a gasket is provided inside the second connecting hole 7. The outer diameter of the gasket is smaller than the inner diameter of the second connecting hole 7 and larger than the inner diameter of the first connecting hole 8. The inner diameter of the gasket is equal to the inner diameter of the first connecting hole 8. The outer diameter of the gasket is larger than the inner diameter of the first connecting hole 8, preventing it from falling into the first connecting hole 8 and forming an axial limiting sealing surface. The outer diameter of the gasket is smaller than the inner diameter of the second connecting hole 7, so it generates elastic deformation during radial compression to fill the fitting gap. The inner diameter of the gasket is equal to the inner diameter of the first connecting hole 8, ensuring that there are no abrupt changes in the cross-section of the steam flow channel and avoiding eddy current loss and local erosion caused by the difference in hole diameter.

[0037] refer to Figure 1 In one embodiment, the diameter of the first connecting hole 8 near the end of the inner tube of the lifting valve gradually increases in the direction towards the inner tube of the lifting valve, which can prevent the steam from being blocked from entering.

[0038] In one embodiment, the first connecting member 4 is made of low-carbon steel (yield strength of No. 20 steel at 400℃), and its length is 50mm. The connection end between the first connecting member 4 and the reducer has a stepped structure with an outer diameter of 36mm, an inner diameter of 30mm, and a length of 20mm. The mating end of the first connecting member 4 with the flange has an inner diameter of 30mm, an outer diameter of 40mm, and a length of 30mm. The first flange 3 has an outer diameter of 82mm, an inner diameter of 40mm, and a thickness of 12mm. The second connecting member... The connecting part 1 is made of low carbon steel. The thickness of the integrally formed second flange 2 is 20mm, the outer diameter is 82mm, the inner diameter (i.e., the diameter of the second connecting hole 7) is 41mm, the hole depth of the second connecting hole 7 is 8mm, the total length of the second connecting part 1 and the second flange 2 is 40mm, the hole diameter of the first connecting hole 8 is 30mm, the hole depth is 30mm, the outer diameter of the first connecting part 4 is 36mm, the size of the gasket is an outer diameter of 40mm, an inner diameter of 30mm, a thickness of 2mm, and the diameters of the first through hole 10 and the second through hole are 12mm.

[0039] Cut the inner tube of the long telescopic sootblower at a point 80mm from the connection between the inner tube and the lifting valve. Insert the first connector 4 into the inner tube end of the reducer side and weld it. Insert the second connector 1 into the inner tube end of the lifting valve and weld it.

[0040] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0041] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered as exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A long telescopic sootblower inner tube connector, characterized in that, It includes a first connector connected to a speed reducer and a second connector connected to the inner pipe of a lift valve, the first connector and the second connector being connected in communication and detachably.

2. The long telescopic sootblower inner tube connector according to claim 1, characterized in that, The first connector and the second connector are respectively provided with a first connecting structure and a second connecting structure. The first connecting structure is a first flange provided on the first connector, and the second connecting structure is a second flange provided on the second connector. The first flange and the second flange are connected by bolts.

3. The long telescopic sootblower inner tube connector according to claim 2, characterized in that, The first flange has four first through holes evenly distributed around its circumference, and the second flange has a second through hole that mates with the first through holes around its circumference. The first through holes and the second through holes are connected by the bolts.

4. The long telescopic sootblower inner tube connector according to claim 2, characterized in that, The first flange is threadedly connected to the first connector, and the second flange is integrally formed with the second connector.

5. The long telescopic sootblower inner tube connector according to claim 4, characterized in that, The inner wall of the first flange is provided with an internal thread, and the outer wall of the first connector is provided with an external thread that mates with the internal thread.

6. The long telescopic sootblower inner tube connector according to claim 4, characterized in that, The inner wall of the second connector has a first connecting hole and a second connecting hole. The first connecting hole is located close to the inner tube of the lifting valve. The inner diameter of the second connecting hole is larger than the inner diameter of the first connecting hole. The inner wall of the first connector has a third connecting hole, and the inner diameter of the third connecting hole is equal to the inner diameter of the first connecting hole.

7. The long telescopic sootblower inner tube connector according to claim 6, characterized in that, The first connector extends out of the first flange, and the outer diameter of the extended end of the first connector is smaller than the inner diameter of the second connecting hole. The extended end is inserted into the second connecting hole.

8. The long telescopic sootblower inner tube connector according to claim 7, characterized in that, The difference between the inner diameter of the second connecting hole and the outer diameter of the protruding end is 0.1 mm to 1.5 mm.

9. The long telescopic sootblower inner tube connector according to claim 7, characterized in that, A washer is provided inside the second connecting hole. The outer diameter of the washer is smaller than the inner diameter of the second connecting hole and larger than the inner diameter of the first connecting hole. The inner diameter of the washer is equal to the inner diameter of the first connecting hole.

10. The long telescopic sootblower inner tube connector according to claim 9, characterized in that, The diameter of the first connecting hole near the end of the inner tube of the lifting valve gradually increases in the direction towards the inner tube of the lifting valve.

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