Fluidization pneumatic ash conveying pipe connecting device of low-pressure energy-saving unit

Abstract

The invention discloses a fluidization pneumatic ash conveying pipe connecting device of a low-pressure energy-saving unit, and relates to the technical field of ash conveying of furnace economizers, the fluidization pneumatic ash conveying pipe connecting device of the low-pressure energy-saving unit comprises a main body unit, an ash conveying pipe, a rectangular opening formed in the ash conveying pipe and an inclined pipe arranged above the ash conveying pipe; the connecting unit comprises a fixing assembly which is arranged on the ash conveying pipe and matched with the rectangular opening, a positioning assembly which is arranged on the fixing assembly and matched with the inclined pipe, a plugging assembly which is arranged on the positioning assembly and matched with the inclined pipe, and an inserting assembly which is arranged on the plugging assembly and matched with the positioning assembly. According to the fluidization pneumatic ash conveying pipe connecting device of the low-pressure energy-saving unit, the connecting unit is arranged, fixed connection between the inclined pipe and the ash conveying pipe is achieved through the fixing assembly, the positioning assembly, the plugging assembly and the inserting assembly on the connecting unit, an inclined hole does not need to be formed in the ash conveying pipe, the installation difficulty is reduced, meanwhile, the cost is reduced, and practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of furnace economizer ash conveying system, and in particular to a low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connecting device. Background Art

[0002] In recent years, the actual coal ash content is higher than the designed coal ash content, which is reflected in the large amount of coarse ash in the economizer flue section, resulting in a large amount of ash accumulation at the corner of the flue at the bottom of the economizer. The economizer flue section is seriously ash-accumulated, which reduces the flue flow area. The flue gas flow is blocked and the flow velocity is reduced, resulting in a series of problems such as blockage of the denitrification catalyst at the rear end of the flue and blockage of the air preheater. It will also cause serious problems such as temperature increase and pressure increase in the boiler, which will lead to safety hazards. Therefore, it is necessary to add a low-pressure energy-saving unit fluidized pneumatic ash conveying system;

[0003] The low-pressure energy-saving unit fluidized pneumatic conveying technology is mainly used to transport powdered materials (such as fly ash from coal-fired power plants) from one place to another. The first is to solve the problem of ash accumulation at the corner of the flue at the bottom of the economizer. The second is to improve the ash conveying efficiency of the economizer ash conveying system and reduce the gas consumption for ash conveying, overcome the problems of difficult transportation and severe pipe wear caused by coarse particles and high specific gravity of economizer fly ash, ensure stable system operation, and avoid pipe blockage; reduce the ash conveying flow rate, reduce pipe and valve wear, and effectively save operating costs; reduce ash conveying pressure, ensure the operating reliability of the ash conveying system and economizer, denitrification, and air preheater systems, ensure stable boiler operation, and reduce the hidden dangers of non-stop units;

[0004] At present, pneumatic conveyors are generally installed on the ash conveying pipeline at an angle of 35° through the connecting pipeline. The inclined installation has the advantages of reducing wear, preventing blockage, improving flow characteristics, reducing energy consumption of pneumatic conveyors, preventing material backflow, and improving conveying efficiency. Since the inclined installation requires the opening of corresponding inclined holes on the ash conveying pipeline in advance for connection, the processing of inclined holes is more complicated than that of straight holes, and special tools and processes may be required, which increases the manufacturing cost and needs to be improved. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the fact that the above-mentioned existing low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device has an inclined installation and needs to open corresponding inclined holes in the ash conveying pipeline in advance for connection, but the processing of inclined holes is more complicated than straight holes and may require special tools and processes, which increases the manufacturing cost, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide a low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device, which aims to solve the problem that the inclined installation requires the opening of corresponding inclined holes on the ash conveying pipeline in advance for connection, but the processing of inclined holes is more complicated than straight holes, and special tools and processes may be required, thereby increasing the manufacturing cost.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a main unit, including an ash conveying pipe, a rectangular opening arranged on the ash conveying pipe, and an inclined pipe arranged above the ash conveying pipe;

[0009] The connecting unit includes a fixing component arranged on the ash conveying pipe and matched with the rectangular opening, a positioning component arranged on the fixing component and matched with the inclined pipe, a plugging component arranged on the positioning component and matched with the inclined pipe, and a plugging component arranged on the plugging component and matched with the positioning component.

[0010] As a preferred solution of the low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device described in the present invention, the fixing assembly includes an upper half ring and a lower half ring arranged on the ash conveying pipe and located on both sides of the rectangular opening, and fixing bolts arranged on the upper half ring and connected to the lower half ring.

[0011] As a preferred solution of the low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device of the present invention, wherein: a connecting rod is arranged on the lower half ring, and a counterweight ball is arranged on the connecting rod.

[0012] As a preferred solution of the low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device described in the present invention, the positioning assembly includes a connecting plate arranged between the two upper semi-rings, a positioning plate arranged on the connecting plate, and a rectangular positioning groove arranged on the connecting plate.

[0013] As a preferred solution of the low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device described in the present invention, the positioning assembly also includes a placement groove 1 arranged on the positioning plate and cooperating with the inclined pipe, an internal thread 1 arranged on the inner wall of the placement groove 1, and a sealing semi-ring 1 arranged on the inner wall of the placement groove 1 and located on one side of the internal thread 1.

[0014] As a preferred solution of the low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device described in the present invention, the sealing assembly includes a sealing plate arranged above the connecting plate, a merging plate arranged on the sealing plate and matched with the positioning plate, and a rectangular connecting groove arranged on the sealing plate and matched with the rectangular positioning groove.

[0015] As a preferred solution of the low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device described in the present invention, the sealing component also includes a placement groove 2 arranged on the merging plate and matching with the inclined tube, an internal thread 2 arranged on the inner wall of the placement groove 2 and matching with the internal thread 1, and a sealing semi-ring 2 arranged on the inner wall of the placement groove 2 and located on one side of the internal thread 2, and the inclined tube is provided with an external thread matching with the internal thread 1 and the internal thread 2.

[0016] As a preferred solution of the low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device of the present invention, the plug-in assembly includes an oblique insertion hole arranged on the positioning block and a vertical insertion hole arranged on the connecting plate.

[0017] As a preferred solution of the low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device described in the present invention, the plug-in assembly also includes an oblique insertion rod arranged on the merging plate and adapted to the oblique insertion hole, a cavity arranged on the sealing plate, and a vertical insertion rod arranged inside the cavity and adapted to the vertical insertion hole.

[0018] As a preferred solution of the low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device of the present invention, the plug-in assembly also includes a spring arranged on the vertical insertion rod and connected to the inner wall of the cavity, and a horizontal plate arranged on the vertical insertion rod.

[0019] The beneficial effects of the present invention are as follows: by setting a connecting unit, a fixing component, a positioning component, a sealing component and a plug-in component on the connecting unit are used to realize a fixed connection between the inclined pipe and the ash conveying pipe, and there is no need to open an inclined hole on the ash conveying pipe, thereby reducing the difficulty of installation, reducing the cost, and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the main unit of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the fixing assembly of the present invention.

[0024] Figure 4It is a schematic structural diagram of the positioning component and the blocking component of the present invention.

[0025] Figure 5 It is a schematic structural diagram of the external thread of the present invention.

[0026] Figure 6 It is a structural schematic diagram of the positioning component of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the plugging assembly of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the plug-in assembly of the present invention.

[0029] Fig. 9 For the present invention Figure 8 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0034] Example 1, reference Figures 1 to 9, which is the first embodiment of the present invention, provides a low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device, which includes a main unit 100, including an ash conveying pipe 101, a rectangular opening 102 arranged on the ash conveying pipe 101, and an inclined pipe 103 arranged above the ash conveying pipe 101; a connection unit 200, including a fixing component 201 arranged on the ash conveying pipe 101 and matched with the rectangular opening 102, a positioning component 202 arranged on the fixing component 201 and matched with the inclined pipe 103, a sealing component 203 arranged on the positioning component 202 and matched with the inclined pipe 103, and a plug-in component 204 arranged on the sealing component 203 and matched with the positioning component 202.

[0035] The rectangular opening 102 is opened at the top of the outer surface of the ash conveying pipe 101 , and there are at least four rectangular openings 102 . The inclined pipe 103 is connected to the ash conveying pipe 101 through the connecting unit 200 .

[0036] When in use, the positioning component 202 can be placed centrally on the ash conveying pipe 101 through the fixing component 201, so that the position of the positioning component 202 corresponds to the position of the rectangular opening 102, and the sealing component 203 is connected to the positioning component 202 to achieve sealing at the rectangular opening 102, and then the plug-in component 204 is used to fix the positioning component 202 and the sealing component 203, so that the inclined tube 103 is fixedly installed on the ash conveying pipe 101.

[0037] Example 2, reference Figures 1 to 7 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the fixing assembly 201 includes an upper half ring 201a and a lower half ring 201b which are arranged on the ash conveying pipe 101 and located on both sides of the rectangular opening 102, and a fixing bolt 201c which is arranged on the upper half ring 201a and connected to the lower half ring 201b; wherein the inner surfaces of the upper half ring 201a and the lower half ring 201b are both in contact with the outer surface of the ash conveying pipe 101, and the upper half ring 201a and the lower half ring 201b are fixedly connected by the fixing bolt 201c.

[0038] Furthermore, a connecting rod 201d is provided on the lower half ring 201b, and a counterweight ball 201e is provided on the connecting rod 201d; wherein, the connecting rod 201d is fixedly connected to the middle position of the bottom of the outer surface of the lower half ring 201b, and the bottom end of the connecting rod 201d is fixedly connected to the counterweight ball 201e. When the fixing bolt 201c is not fully tightened, through the setting of the counterweight ball 201e, after the fixing component 201 is mounted on the ash conveying pipe 101, the fixing component 201 will be automatically affected by gravity, so that the counterweight ball 201e is located directly below the ash conveying pipe 101.

[0039] Furthermore, the positioning assembly 202 includes a connecting plate 202a arranged between the two upper half rings 201a, a positioning plate 202b arranged on the connecting plate 202a, and a rectangular positioning groove 202c arranged on the connecting plate 202a; wherein, the connecting plate 202a is opposite to the position of the counterweight ball 201e, and when the counterweight ball 201e is located directly below the ash conveying pipe 101, the connecting plate 202a is located directly above the ash conveying pipe 101, and the bottom of the connecting plate 202a is set to an arc that is compatible with the outer surface of the ash conveying pipe 101, so as to better fit and connect to the outer surface of the ash conveying pipe 101; the rectangular positioning groove 202c is opened on the connecting plate 202a, and when the fixing assembly 201 is fixed, the rectangular positioning groove 202c can be used to assist the staff to open the rectangular opening 102 on the ash conveying pipe 101, which is more convenient to use. A rubber pad may be provided at the bottom of the connecting plate 202 a to enhance the sealing between the connecting plate 202 a and the ash conveying pipe 101 .

[0040] Furthermore, the positioning assembly 202 also includes a placement groove 202d arranged on the positioning plate 202b and cooperating with the inclined tube 103, an internal thread 202e arranged on the inner wall of the placement groove 202d, and a sealing half ring 202f arranged on the inner wall of the placement groove 202d and located on one side of the internal thread 202e; wherein one side of the positioning plate 202b is inclined at 35°, and the placement groove 202d is also inclined at 35° on the positioning plate 202b.

[0041] Furthermore, the blocking assembly 203 includes a blocking plate 203a disposed above the connecting plate 202a, a merging plate 203b disposed on the blocking plate 203a and matched with the positioning plate 202b, and a rectangular connecting groove 203c disposed on the blocking plate 203a and matched with the rectangular positioning groove 202c; wherein the blocking plate 203a and the connecting plate 202a are tightly fitted, and a rubber pad can be disposed on one side where the blocking plate 203a and the connecting plate 202a are connected to enhance the sealing of the connection. The merging plate 203b fits tightly with the positioning plate 202b, and a rubber pad can be set on the side where the sealing plate 203a and the connecting plate 202a are connected to enhance the sealing of the connection, and a rubber pad can be set on the side where the merging plate 203b and the positioning plate 202b are connected to enhance the sealing of the connection; the side where the merging plate 203b and the positioning plate 202b fit together are both inclined at 35°, and when the sealing component 203 and the positioning component 202 are fully fitted, the position of the connecting groove corresponds to the rectangular positioning groove 202c.

[0042] Furthermore, the plugging component 203 also includes a second placement groove 203d arranged on the merging plate 203b and matched with the inclined tube 103, an internal thread 203e arranged on the inner wall of the second placement groove 203d and matched with the internal thread 1 202e, and a sealing semi-ring 203f arranged on the inner wall of the second placement groove 203d and located on one side of the internal thread 203e. The inclined tube 103 is provided with an external thread 203g matched with the internal thread 1 202e and the internal thread 203e; wherein, when the plugging component 203 is completely fitted with the positioning component 202, the placement groove 1 202d and the placement groove 203d just form a circular hole adapted to the inclined tube 103, and the internal thread 1 202e and the internal thread 2 203e will just connect together, and can be threadedly connected with the external thread 203g on the inclined tube 103, so as to install the inclined tube 103;

[0043] After the plugging component 203 is completely fitted with the positioning component 202, the sealing half ring 1 202f and the sealing half ring 2 203f will form a complete ring, thereby ensuring the sealing of the connection of the inclined tube 103 when the inclined tube 103 is subsequently installed.

[0044] When in use, firstly, the upper half ring 201a and the lower half ring 201b are fixedly connected to the outer surface of the ash conveying pipe 101 by means of the fixing bolts 201c. When the fixing bolts 201c are not completely tightened, the upper half ring 201a and the lower half ring 201b will be automatically affected by the weight ball 201e and automatically adjust their positions so that the weight ball 201e is located directly below the ash conveying pipe 101, that is, the connecting plate 202a is located directly above the ash conveying pipe 101. Then, the fixing bolts 201c are completely tightened, and the rectangular positioning grooves 202c are used to assist the staff to fix the ash conveying pipe 101. A rectangular opening 102 is opened on the ash conveying pipe 101. After the rectangular opening 102 is opened, the connecting plate 202a, the sealing plate 203a, the positioning plate 202b and the merging plate 203b are tightly connected together through the plug-in assembly 204. Finally, the inclined tube 103 is connected to the ash conveying pipe 101 through the placement groove 1 202d, the placement groove 203d, the connecting groove, the rectangular positioning groove 202c and the rectangular opening 102, and is threadedly connected using the external thread 203g, the internal thread 1 202e and the internal thread 2 203e to prevent the inclined tube 103 from falling off.

[0045] The remaining structures are the same as those of Example 1.

[0046] Example 3, reference Figures 6 to 9, which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the plug-in component 204 includes an oblique insertion hole 204a arranged on the positioning block, and a vertical insertion hole 204b arranged on the connecting plate 202a; wherein, the oblique insertion hole 204a is opened on the inclined surface of the positioning plate 202b, the number of the oblique insertion holes 204a is at least six, and three are grouped together and respectively positioned on both sides of the groove 1 202d; the vertical insertion holes 204b are opened on the top of the connecting plate 202a, the number of the vertical insertion holes 204b is at least six, and three are grouped together and respectively positioned on both sides of the rectangular positioning groove 202c.

[0047] Furthermore, the plug-in assembly 204 also includes an oblique insertion rod 204c arranged on the merging plate 203b and adapted to the oblique insertion hole 204a, a cavity 204d arranged on the sealing plate, and a vertical insertion rod 204e arranged inside the cavity 204d and adapted to the vertical insertion hole 204b; wherein the oblique insertion rod 204c is fixedly connected to the inclined surface of the merging plate 203b, and the number of the oblique insertion rods 204c is consistent with the number of the oblique insertion holes 204a, and the positions of the oblique insertion rods 204c also correspond to the positions of the oblique insertion holes 204a; the number of cavities 204d is at least six, and three are arranged in a group and are respectively located on both sides of the connecting groove, the number of vertical insertion rods 204e is consistent with the number of vertical insertion holes 204b, and the positions of the vertical insertion rods 204e also correspond to the positions of the vertical insertion holes 204b.

[0048] Furthermore, the plug-in assembly 204 also includes a spring 204f arranged on the vertical insertion rod 204e and connected to the inner wall of the cavity 204d, and a horizontal plate 204g arranged on the vertical insertion rod 204e; wherein, the bottom end of the vertical insertion rod 204e is set as a round head, which cooperates with the spring 204f for connection; a horizontal plate 204g is fixedly connected between the top ends of each group of three vertical connecting rods 201d.

[0049] When in use, after the upper half ring 201a and the lower half ring 201b are fixed in position, the sealing plate 203a is fitted on the top of the connecting plate 202a and moved, so that the vertical insertion rod 204e squeezes the spring 204f and completely enters the vertical insertion hole 204b, and the oblique insertion rod 204c also completely enters the oblique insertion hole 204a, and the inclined pipe 103 can be installed and connected to make it communicate with the ash conveying pipe 101. A flange is provided at the top of the inclined pipe 103. After the flange is connected to the connecting pipe on the pneumatic conveyor, the ash conveying work can be carried out.

[0050] The remaining structure is the same as that of Example 2.

[0051] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0052] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device, characterized in that: include, The main unit (100) comprises an ash conveying pipe (101), a rectangular opening (102) arranged on the ash conveying pipe (101), and an inclined pipe (103) arranged above the ash conveying pipe (101); The connection unit (200) comprises a fixing component (201) arranged on the ash conveying pipe (101) and cooperating with the rectangular opening (102), a positioning component (202) arranged on the fixing component (201) and cooperating with the inclined pipe (103), a plugging component (203) arranged on the positioning component (202) and cooperating with the inclined pipe (103), and a plugging component (204) arranged on the plugging component (203) and cooperating with the positioning component (202).

2. The low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device according to claim 1 is characterized in that: The fixing assembly (201) comprises an upper half ring (201a) and a lower half ring (201b) which are arranged on the ash conveying pipe (101) and located on both sides of the rectangular opening (102), and a fixing bolt (201c) which is arranged on the upper half ring (201a) and connected to the lower half ring (201b).

3. The low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device according to claim 2 is characterized in that: The lower half ring (201b) is provided with a connecting rod (201d), and the connecting rod (201d) is provided with a counterweight ball (201e).

4. The low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device according to claim 3 is characterized in that: The positioning assembly (202) comprises a connecting plate (202a) arranged between the two upper half rings (201a), a positioning plate (202b) arranged on the connecting plate (202a), and a rectangular positioning groove (202c) arranged on the connecting plate (202a).

5. The low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device according to claim 4 is characterized in that: The positioning assembly (202) also includes a placement groove (202d) arranged on the positioning plate (202b) and cooperating with the inclined tube (103), an internal thread (202e) arranged on the inner wall of the placement groove (202d), and a sealing half ring (202f) arranged on the inner wall of the placement groove (202d) and located on one side of the internal thread (202e).

6. The low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device according to claim 5, characterized in that: The blocking assembly (203) comprises a blocking plate (203a) arranged above the connecting plate (202a), a merging plate (203b) arranged on the blocking plate (203a) and matched with the positioning plate (202b), and a rectangular connecting groove (203c) arranged on the blocking plate (203a) and matched with the rectangular positioning groove (202c).

7. The low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device according to claim 6, characterized in that: The blocking assembly (203) further includes a second placement groove (203d) arranged on the merging plate (203b) and cooperating with the inclined tube (103), a second internal thread (203e) arranged on the inner wall of the second placement groove (203d) and cooperating with the first internal thread (202e), and a second sealing half ring (203f) arranged on the inner wall of the second placement groove (203d) and located on one side of the second internal thread (203e). The inclined tube (103) is provided with an external thread (203g) cooperating with the first internal thread (202e) and the second internal thread (203e).

8. The low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device according to claim 7, characterized in that: The plug-in assembly (204) comprises an oblique insertion hole (204a) arranged on the positioning block, and a vertical insertion hole (204b) arranged on the connecting plate (202a).

9. The low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device according to claim 8, characterized in that: The plug-in assembly (204) further comprises an oblique insertion rod (204c) arranged on the merging plate (203b) and adapted to the oblique insertion hole (204a), a cavity (204d) arranged on the sealing plate, and a vertical insertion rod (204e) arranged inside the cavity (204d) and adapted to the vertical insertion hole (204b).

10. The low-pressure energy-saving unit fluidized pneumatic ash conveying pipe connection device according to claim 9, characterized in that: The plug-in assembly (204) further comprises a spring (204f) arranged on the vertical insertion rod (204e) and connected to the inner wall of the cavity (204d), and a transverse plate (204g) arranged on the vertical insertion rod (204e).

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