Combined sealing device of soot blower

Abstract

The invention belongs to the technical field of soot blower sealing connection, and discloses a soot blower combined type sealing device which comprises a blowing pipe, and a welding disc is welded and installed in the middle of the blowing pipe. The spring structure can push the first auxiliary movable block and the second auxiliary movable block to extend outwards, the first auxiliary sealing pipe and the second auxiliary sealing pipe are extruded to be combined in the extending process, the combination can effectively maintain the sealing effect, the first multi-ring sealing ring and the second multi-ring sealing ring which are arranged inside are connected through a plurality of sets of sealing rings and high-temperature-resistant soft pieces, and the sealing effect is improved. And the sealing performance between the movable block and the sealing frame is further improved, the sealing performance can be effectively improved in an extrusion mode, and the automatic extrusion effect can be achieved by using an auxiliary spring structure.

Description

Technical Field

[0001] This invention belongs to the field of sootblower sealing connection technology, specifically a combined sealing device for sootblowers. Background Technology

[0002] Soot blowers are devices used to remove ash from equipment such as boilers and heat exchangers. Their technological development has evolved from mechanical to intelligent, initially using steam or compressed air pulse blowing, and later developing into physical soot removal technologies such as sound waves and shock waves. The core of the background technology lies in solving the problems of low efficiency, high energy consumption, and easy damage to the heating surface of traditional methods. Currently, the mainstream technologies include rotary, telescopic, and intelligent online soot blowing systems, which are widely used in power, chemical and other fields. However, the sealing structure of the connection area between the soot blower and the furnace wall usually has a short service life, which easily leads to the problem of decreased sealing performance.

[0003] For example, utility model publication CN220623116U discloses a sootblower sealing device, including a main body and a connecting sealing mechanism. The connecting sealing mechanism is located in front of the main body. The main body includes a boiler wall, a connecting through hole, and a connecting pipe seat. The connecting through hole is fixedly disposed at the front end of the boiler wall, and the connecting pipe seat is movably installed in front of the boiler wall. The main body also includes a connecting sleeve and a connecting installation assembly. The connecting sleeve is movably installed in front of the connecting pipe seat, and the connecting installation assembly is located at the left end of the connecting sleeve. This sootblower sealing device, through the installation and improvement of the main body, enhances the installation and disassembly capabilities. In actual use, the sootblower pipe can be easily installed and connected to the boiler wall according to usage needs, and disassembly is convenient, facilitating maintenance and improving the market competitiveness of this sootblower sealing device.

[0004] Existing sealing devices in the prior art have a single sealing structure inside. Since the sealing structure is located inside the pipe, it is closer to the heat inside the pipe, which greatly reduces the service life of the sealing structure. In addition, the sealing performance of the single sealing structure is poor and cannot effectively guarantee the sealing effect.

[0005] Therefore, a combined sealing device for soot blowers is proposed to solve the problems mentioned in the background art. Summary of the Invention

[0006] To address the problems mentioned in the background section, the present invention provides a combined sealing device for a soot blower.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a combined sealing device for a soot blower, comprising a blowpipe, a welding disc welded to the middle of the blowpipe, a sealing ring mounted on the left side of the welding disc, a welding sleeve disposed on the outer side of the sealing ring, and a first secondary sealing frame welded to the outer side of the welding sleeve, a first secondary spring disposed inside the first secondary sealing frame, a powerful spring movably disposed on the right side of the welding disc, and a combined sleeve movably disposed on the outer side of the powerful spring, the combined sleeve being movably disposed outside the blowpipe, a second secondary sealing frame welded to the outer side of the combined sleeve, and a second secondary spring disposed inside the second secondary sealing frame, a first secondary movable block fixedly mounted on the side of the first secondary spring near the combined sleeve, and a first secondary sealing tube fixedly mounted on the side of the first secondary movable block near the combined sleeve, a second secondary movable block fixedly mounted on the side of the second secondary spring near the welding sleeve, and a second secondary sealing tube fixedly mounted on the side of the second secondary movable block near the first secondary sealing tube, the second secondary sealing tube and the first secondary sealing tube being in close contact.

[0008] Preferably, a stabilizing ring is fixedly installed on the side of the welding disc away from the sealing ring, and the stabilizing ring is movably disposed inside the combined sleeve. Eight sets of positioning rods are fixedly installed on the side of the welding disc away from the stabilizing ring.

[0009] Preferably, the welding sleeve has a sealing groove on the side near the welding pad, the sealing ring is movably disposed inside the sealing groove, and the welding sleeve has eight sets of positioning slots on the side near the welding pad, the positioning rod is movably disposed inside the positioning slots.

[0010] Preferably, a welding ring is welded to the outer side of the first auxiliary sealing frame near the combined sleeve. The surface of the welding ring has eight through grooves, and the side of the welding ring away from the combined sleeve has sixteen positioning grooves. The two positioning grooves are located on both sides of the through grooves. Two sets of first multi-ring sealing rings are fixedly installed on the side of the first auxiliary movable block away from the first auxiliary sealing tube, and the first multi-ring sealing rings are movably disposed on the inner wall of the first auxiliary sealing frame.

[0011] Preferably, two sets of second multi-ring seals are fixedly installed on the side of the second auxiliary movable block away from the second auxiliary sealing tube, and the second multi-ring seals are movably disposed on the inner wall of the second auxiliary sealing frame. A limit ring is welded and installed on the outer side of the second auxiliary sealing frame near the welding sleeve, and eight sets of combined bearings are movably embedded in the inner side of the limit ring. An adjustment ring is movably disposed on the outer side of the limit ring.

[0012] Preferably, the combined bearing has two gears fixedly installed at both ends, and a fixing sleeve is fixedly installed on the side of the two gears away from the welding ring. A fixing screw is provided on the inner side of the fixing sleeve near the welding ring. A movable rod is movably installed on the inner side of the fixing screw away from the fixing sleeve. A through block is installed on the end of the movable rod away from the fixing sleeve. Two sets of positioning blocks are fixedly installed on the side of the through block near the movable rod. The positioning blocks are movably spliced ​​on the inner side of the positioning groove. A fixing ring is welded and installed on the outer side of the fixing screw away from the fixing sleeve.

[0013] Preferably, the inner side of the adjusting ring is provided with two sets of combined grooves, and several sets of balls are provided between the combined grooves and the limiting ring. Several sets of fixed teeth are fixedly installed on the inner ring of the limiting ring, and the fixed teeth mesh with the double gears.

[0014] Preferably, eight welding handles are welded to the outer side of the adjusting ring, and a fixed bearing is fixedly installed on the inner side of the welding handle away from the adjusting ring. An adjusting screw is fixedly installed on the inner side of the fixed bearing, and an adjusting knob is fixedly installed on the end of the adjusting screw away from the adjusting ring. A square push block is provided on the outer side of the adjusting screw, and the square push block is movably disposed on the inner side of the welding handle. An anti-slip plate is welded to the end of the square push block away from the adjusting knob, and the anti-slip plate is in close contact with the outer ring of the limiting ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] This invention utilizes a combination of a first sealing frame, a first secondary spring, and a first secondary sealing tube to separate the sealing structure internally and externally. The sealing performance is enhanced by adding more sealing structures. The first and second secondary sealing frames provide installation positions for the internal structures, while the first and second secondary springs provide support. During assembly, the spring structure pushes the first and second movable blocks outwards, compressing the first and second secondary sealing tubes together. This combination effectively maintains the sealing effect. Furthermore, the internally designed first and second multi-ring sealing rings, connected by high-temperature resistant flexible sheets, further increase the sealing performance between the movable blocks and the sealing frame. The compression method effectively improves the sealing performance, and the secondary spring structure enables automatic compression.

[0017] This invention facilitates rapid installation and locking by incorporating an adjusting ring, double gears, and a through block. Eight sets of rotatable double gears on the limiting ring rotate to drive the fixing sleeve. The threaded structure of the fixing sleeve controls the lateral movement of the fixing screw, pulling the through block at the end to retract. During retraction, the positioning block, positioned inside the positioning groove, tightens the gap between the adjusting limiting ring and the welding ring. The rotating fixed gear on the adjusting ring outside the limiting ring meshes with the double gears, achieving rapid adjustment. The adjusting screw can be controlled by an adjusting knob at the end, and the square push block and anti-slip plate are extended using a bolt structure, maintaining close contact with the limiting ring to achieve locking. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the blow-jet nozzle of the present invention;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the welding sleeve of the present invention;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the combined sleeve of the present invention;

[0023] Figure 6 This invention is for Figure 4 Enlarged view of point A in the middle;

[0024] Figure 7 This invention is for Figure 5 Enlarged view of point B in the middle;

[0025] Figure 8 This is a schematic diagram of the cross-sectional structure of the double gear of the present invention;

[0026] Figure 9 This is a schematic diagram of the cross-sectional structure of the adjusting ring of the present invention;

[0027] Figure 10 This is a schematic cross-sectional view of the welding handle of the present invention;

[0028] Figure 11 This invention is for Figure 9 Enlarged diagram of point C in the middle.

[0029] In the diagram: 1. Blow-off pipe; 101. Welding disc; 102. Stabilizing ring; 103. Sealing ring; 104. Positioning rod; 2. Welding sleeve; 201. First sealing frame; 202. Sealing groove; 203. Positioning slot; 204. Welding ring; 205. Through groove; 206. Positioning groove; 207. First spring; 208. First movable block; 209. First sealing tube; 210. First multi-ring sealing ring; 3. Combination sleeve; 301. Second sealing frame; 302. Strong spring; 303. Limiting ring; 304. Second 305. Secondary spring; 306. Secondary sealing tube; 307. Secondary multi-ring sealing ring; 4. Fixing screw sleeve; 401. Combined bearing; 402. Double gear; 403. Fixing screw; 404. Fixing ring; 405. Movable rod; 406. Through block; 407. Positioning block; 5. Adjusting ring; 501. Combined groove; 502. Ball bearing; 503. Fixing tooth block; 6. Welded handle; 601. Fixing bearing; 602. Adjusting knob; 603. Adjusting screw; 604. Square push block; 605. Anti-slip plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 11 As shown, the present invention provides a combined sealing device for a soot blower, including a blowpipe 1, a welding plate 101 welded to the middle of the blowpipe 1, a sealing ring 103 installed on the left side of the welding plate 101, a welding sleeve 2 provided on the outer side of the sealing ring 103, and a first secondary sealing frame 201 welded to the outer side of the welding sleeve 2. A first secondary spring 207 is provided inside the first secondary sealing frame 201. A strong spring 302 is movably arranged on the right side of the welding plate 101, and a combined sleeve 3 is movably installed on the outer side of the strong spring 302. The combined sleeve 3 is movably arranged on the outer side of the blowpipe 1, and the outer side of the combined sleeve 3 is welded... A second sealing frame 301 is installed, and a second spring 304 is provided inside the second sealing frame 301. A first movable block 208 is fixedly installed on the side of the first spring 207 near the combined sleeve 3, and a first sealing tube 209 is fixedly installed on the side of the first movable block 208 near the combined sleeve 3. A second movable block 305 is fixedly installed on the side of the second spring 304 near the welding sleeve 2, and a second sealing tube 306 is fixedly installed on the side of the second movable block 305 near the first sealing tube 209, and the second sealing tube 306 and the first sealing tube 209 are in close contact.

[0032] The above solution utilizes the first and second sealing frames 201 and 301 to provide installation positions for the internal structure. The first and second springs 207 and 304 inside provide support. During assembly, the spring structure pushes the first and second movable blocks 208 and 305 outward, compressing the first and second sealing tubes 209 and 306 together. This combination effectively maintains the sealing effect. Furthermore, the first multi-ring sealing ring 210 and the second multi-ring sealing ring 307 inside are connected by multiple sets of sealing rings using high-temperature resistant soft sheets, further increasing the sealing performance between the movable block and the sealing frame. The sealing performance can be effectively improved through compression, and the automatic compression effect can be achieved by using the secondary spring structure.

[0033] like Figures 1-3 As shown, a stabilizing ring 102 is fixedly installed on the side of the welding disc 101 away from the sealing ring 103, and the stabilizing ring 102 is movably arranged inside the combined sleeve 3. Eight sets of positioning rods 104 are fixedly installed on the side of the welding disc 101 away from the stabilizing ring 102.

[0034] Using the above solution: the stabilizing ring 102 can be movably spliced ​​with the inner wall of the combination sleeve 3. During assembly, the stabilizing ring 102 can increase the stability of the combination sleeve 3 during installation. The positioning rod 104 can be inserted into the inner side of the positioning slot 203 to further improve stability.

[0035] like Figures 3-6 As shown, a sealing groove 202 is provided on the side of the welding sleeve 2 near the welding plate 101, and a sealing ring 103 is movably disposed inside the sealing groove 202. Eight sets of positioning slots 203 are provided on the side of the welding sleeve 2 near the welding plate 101, and positioning rods 104 are movably disposed inside the positioning slots 203.

[0036] A welding ring 204 is welded to the outer side of the first sealing frame 201 near the combined sleeve 3. Eight sets of through grooves 205 are opened through the surface of the welding ring 204, and sixteen sets of positioning grooves 206 are opened on the side of the welding ring 204 away from the combined sleeve 3. Two sets of positioning grooves 206 are located on both sides of the through grooves 205. Two sets of first multi-ring sealing rings 210 are fixedly installed on the side of the first movable block 208 away from the first sealing tube 209, and the first multi-ring sealing rings 210 are movably set on the inner wall of the first sealing frame 201.

[0037] Two sets of second multi-ring seals 307 are fixedly installed on the side of the second auxiliary movable block 305 away from the second auxiliary sealing tube 306. The second multi-ring seals 307 are movably disposed on the inner wall of the second auxiliary sealing frame 301. A limit ring 303 is welded and installed on the outer side of the second auxiliary sealing frame 301 near the welding sleeve 2. Eight sets of combined bearings 401 are movably embedded in the inner side of the limit ring 303. An adjusting ring 5 is movably disposed on the outer side of the limit ring 303.

[0038] Using the above scheme: the sealing groove 202 and the sealing ring 103 can cooperate to increase the sealing performance by compression. At the same time, the positioning slot 203 can provide a splicing position for the positioning rod 104. The welding ring 204 can provide a restriction for splicing installation. The through groove 205 can provide the through block 406 with the ability to be inserted and spliced. The through groove 205 and the through block 406 are two sets of cylindrical and rectangular shapes. After the through block 406 passes through the through groove 205, it can be rotated to assist in locking. The positioning groove 206 can be spliced ​​with the positioning block 407 to increase the restriction and prevent the through block 406 from rotating. The first multi-ring sealing ring 210 and the second multi-ring sealing ring 307 are three sets of sealing rings connected to the high-temperature resistant soft sheet. During the adjustment process, they will be tightly attached to the inner wall of the first secondary sealing frame 201 and the second secondary sealing frame 301, and can maintain a sealed state when moving.

[0039] like Figures 8-10 As shown, double gears 402 are fixedly installed at both ends of the combined bearing 401, and a fixing sleeve 4 is fixedly installed on the side of the double gears 402 away from the welding ring 204. A fixing screw 403 is provided on the inner side of the fixing sleeve 4 near the welding ring 204. A movable rod 405 is movably provided on the inner side of the fixing screw 403 away from the fixing sleeve 4. A through block 406 is installed on the end of the movable rod 405 away from the fixing sleeve 4. Two sets of positioning blocks 407 are fixedly installed on the side of the through block 406 near the movable rod 405. The positioning blocks 407 are movably spliced ​​on the inner side of the positioning groove 206. A fixing ring 404 is welded and installed on the outer side of the fixing screw 403 away from the fixing sleeve 4.

[0040] The inner side of the adjusting ring 5 is provided with two sets of combination grooves 501, and several sets of balls 502 are provided between the combination grooves 501 and the limiting ring 303. Several sets of fixed teeth 503 are fixedly installed on the inner ring of the limiting ring 303, and the fixed teeth 503 mesh with the double gear 402.

[0041] Eight sets of welding handles 6 are welded to the outer side of the adjusting ring 5. A fixed bearing 601 is fixedly installed on the inner side of the welding handle 6 away from the adjusting ring 5. An adjusting screw 603 is fixedly installed on the inner side of the fixed bearing 601. An adjusting knob 602 is fixedly installed on the end of the adjusting screw 603 away from the adjusting ring 5. A square push block 604 is provided on the outer side of the adjusting screw 603. The square push block 604 is movably disposed on the inner side of the welding handle 6. An anti-slip plate 605 is welded to the end of the square push block 604 away from the adjusting knob 602. The anti-slip plate 605 is tightly attached to the outer ring of the limiting ring 303.

[0042] Using the above scheme: the double gear 402 can mesh with the outer fixed tooth block 503. When the limiting ring 303 rotates, the fixed tooth block 503 will rotate synchronously. Since the double gear 402 is restricted by the combined bearing 401, the fixed tooth block 503 will mesh and drive the double gear 402 to rotate along the combined bearing 401. At the same time, the fixed screw sleeve 4 will rotate synchronously due to the welding fixation. The internal thread structure will drive the fixed screw 403 to move laterally, thereby achieving the effect of adjustment and tightening. The movable rod 405 can be extended and retracted inside the fixed screw 403. In this way, the through block 40 can be adjusted. Positioning block 407 at 6 facilitates installation by staff. The fixing ring 404 connects eight sets of fixing screws 403 to prevent the fixing screws 403 from rotating, ensuring that the fixing screws 403 can be adjusted laterally normally. The welding handle 6 can be fixed with the limit ring 303. The internal fixing bearing 601 can assist the adjustment screw 603 in rotating. By grasping the adjustment knob 602 to control the adjustment screw 603, the square push block 604 can be driven to extend outward along the inner square groove using the thread. The anti-slip plate 605 can be used to press against the outer side of the limit ring 303 to achieve the locking effect. This method can prevent the adjustment ring 5 from rotating.

[0043] The working principle and usage process of this invention are as follows: First, insert the blowpipe 1 into the middle of the welding sleeve 2. During insertion, ensure that the sealing ring 103 is embedded inside the sealing groove 202, and simultaneously ensure that the positioning rod 104 is aligned with the inside of the positioning slot 203. After splicing, control the movable rod 405 to extend and retract along the fixing screw 403. After the through block 406 passes through the inside of the through groove 205, rotate it 90 degrees. Align the positioning block 407 with the positioning slot 206 and maintain the spliced ​​state. Then, grasp the welding handle 6 to drive the adjusting ring 5 to rotate. During the rotation, the fixing tooth block 503 will mesh and drive each set of double gears 402 to rotate. During the rotation, the fixing screw sleeve 4 will drive the fixing screw 403 through the thread. The sleeve retracts into the fixed sleeve 4, and at the same time, the positioning block 407 at the end will tighten and install. During the tightening process, the strong spring 302 will push the blow pipe 1 to move laterally, keeping the sealing ring 103 compressed to maintain the seal. At the same time, during the tightening process, the first sealing tube 209 and the second sealing tube 306 will remain in a combined state and continue to compress the first spring 207 and the second spring 304, thereby further improving the seal. Finally, grasp the adjustment knob 602 to drive the adjustment screw 603 to rotate. During the rotation, the adjustment screw 603 will drive the square push block 604 and the anti-slip plate 605 to extend outward. The extension uses the anti-slip plate 605 to press against the limiting ring 303 and achieve the locking effect.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combined sealing device for a soot blower, comprising a blowpipe (1), characterized in that: A welding disc (101) is welded to the middle of the blowpipe (1), and a sealing ring (103) is installed on the left side of the welding disc (101). A welding sleeve (2) is provided on the outside of the sealing ring (103), and a first secondary sealing frame (201) is welded to the outside of the welding sleeve (2). A first secondary spring (207) is provided inside the first secondary sealing frame (201). A strong spring (302) is movably provided on the right side of the welding disc (101), and a combined sleeve (3) is movably installed on the outside of the strong spring (302). The combined sleeve (3) is movably provided on the outside of the blowpipe (1), and a second secondary sealing frame (207) is welded to the outside of the combined sleeve (3). 301), and the second auxiliary sealing frame (301) is provided with a second auxiliary spring (304). The first auxiliary spring (207) is fixedly installed with a first auxiliary movable block (208) on the side near the combined sleeve (3), and the first auxiliary movable block (208) is fixedly installed with a first auxiliary sealing tube (209) on the side near the combined sleeve (3). The second auxiliary spring (304) is fixedly installed with a second auxiliary movable block (305) on the side near the welding sleeve (2), and the second auxiliary movable block (305) is fixedly installed with a second auxiliary sealing tube (306) on the side near the first auxiliary sealing tube (209), and the second auxiliary sealing tube (306) and the first auxiliary sealing tube (209) are in close contact.

2. The combined sealing device for a soot blower according to claim 1, characterized in that: A stabilizing ring (102) is fixedly installed on the side of the welding disc (101) away from the sealing ring (103), and the stabilizing ring (102) is movably arranged inside the combined sleeve (3). Eight sets of positioning rods (104) are fixedly installed on the side of the welding disc (101) away from the stabilizing ring (102).

3. The combined sealing device for a soot blower according to claim 2, characterized in that: The welding sleeve (2) has a sealing groove (202) on the side near the welding plate (101), and the sealing ring (103) is movably disposed inside the sealing groove (202). The welding sleeve (2) has eight sets of positioning slots (203) on the side near the welding plate (101), and the positioning rod (104) is movably disposed inside the positioning slots (203).

4. The combined sealing device for a soot blower according to claim 1, characterized in that: A welding ring (204) is welded to the outer side of the first secondary sealing frame (201) near the combined sleeve (3). Eight sets of through grooves (205) are opened through the surface of the welding ring (204), and sixteen sets of positioning grooves (206) are opened on the side of the welding ring (204) away from the combined sleeve (3). Two sets of positioning grooves (206) are located on both sides of the through grooves (205). Two sets of first multi-ring sealing rings (210) are fixedly installed on the side of the first secondary movable block (208) away from the first secondary sealing tube (209), and the first multi-ring sealing rings (210) are movably arranged on the inner wall of the first secondary sealing frame (201).

5. A combined sealing device for a soot blower according to claim 1, characterized in that: Two sets of second multi-ring seals (307) are fixedly installed on the side of the second auxiliary movable block (305) away from the second auxiliary sealing tube (306), and the second multi-ring seals (307) are movably disposed on the inner wall of the second auxiliary sealing frame (301). A limit ring (303) is welded and installed on the outer side of the second auxiliary sealing frame (301) near the welding sleeve (2), and eight sets of combined bearings (401) are movably embedded in the inner side of the limit ring (303). An adjusting ring (5) is movably disposed on the outer side of the limit ring (303).

6. A combined sealing device for a soot blower according to claim 5, characterized in that: The combined bearing (401) is fixedly mounted with double gears (402) at both ends, and a fixing sleeve (4) is fixedly mounted on the side of the double gears (402) away from the welding ring (204), and a fixing screw (403) is provided on the inner side of the fixing sleeve (4) near the welding ring (204).

7. A combined sealing device for a soot blower according to claim 6, characterized in that: A movable rod (405) is movably provided on the inner side of the fixed screw (4) away from the fixed screw sleeve (4), and a through block (406) is installed on the end of the movable rod (405) away from the fixed screw sleeve (4). Two sets of positioning blocks (407) are fixedly installed on the side of the through block (406) close to the movable rod (405), and the positioning blocks (407) are movably spliced ​​on the inner side of the positioning groove (206). A fixing ring (404) is welded and installed on the outer side of the fixed screw (403) away from the fixed screw sleeve (4).

8. A combined sealing device for a soot blower according to claim 5, characterized in that: The inner side of the adjusting ring (5) is provided with two sets of combination grooves (501), and a number of sets of balls (502) are provided between the combination grooves (501) and the limiting ring (303). A number of sets of fixed teeth (503) are fixedly installed on the inner ring of the limiting ring (303), and the fixed teeth (503) mesh with the double gear (402).

9. A combined sealing device for a soot blower according to claim 5, characterized in that: Eight sets of welding handles (6) are welded to the outside of the adjusting ring (5), and a fixed bearing (601) is fixedly installed on the inner side of the welding handle (6) away from the adjusting ring (5). An adjusting screw (603) is fixedly installed on the inner side of the fixed bearing (601), and an adjusting knob (602) is fixedly installed on the end of the adjusting screw (603) away from the adjusting ring (5).

10. A combined sealing device for a soot blower according to claim 9, characterized in that: A square push block (604) is provided on the outer side of the adjusting screw (603), and the square push block (604) is movably disposed on the inner side of the welding handle (6). An anti-slip plate (605) is welded to the end of the square push block (604) away from the adjusting knob (602), and the anti-slip plate (605) is in close contact with the outer ring of the limiting ring (303).

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