A connection structure of a double-tube dense phase conveying system

Abstract

The present invention discloses a connection structure of a double-tube dense phase conveying system, which relates to the technical field of ash conveying systems for economizers of furnaces, and comprises a main unit, including a conveying pipe, an inner liner pipe arranged on the inner wall of the conveying pipe, an oblique opening arranged on the inner liner pipe, a circular hole sheet arranged on the inner wall of the inner liner pipe, and two flanges arranged on the conveying pipe; a connection unit, including a connection assembly arranged on the inner liner pipe, and a fixing assembly arranged on the flange and matched with the connection assembly. The connection structure of the double-tube dense phase conveying system, by setting a connection unit and utilizing structures such as a screw rod, a clamping plate, and a circular plate on the connection unit, connects and fixes the two ends of the inner liner pipe on the flange on the basis of the original welding method of the inner liner pipe and the conveying pipe, thereby enhancing the firmness of the connection of the inner liner pipe and avoiding the situation in which the inner liner pipe falls off due to fatigue of the device when the connection method between the inner liner pipe and the conveying pipe is only through welding.

Description

Technical Field

[0001] The invention relates to the technical field of ash conveying systems for economizers of furnaces, and in particular to a connection structure of a double-tube dense phase conveying system. Background Art

[0002] A furnace economizer usually refers to an energy-saving device used in a boiler or furnace. Its main function is to recycle and utilize the waste heat generated during the combustion of fuel, thereby improving energy efficiency and reducing fuel consumption. Since the actual coal ash content in recent years is higher than the designed coal ash content, the amount of coarse ash in the economizer flue section is large, 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, reducing the flue flow area, and the flue gas flow is blocked and the flow rate 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 rise and pressure increase in the boiler, which will lead to safety hazards. Therefore, it is necessary to clean the economizer regularly. At present, the ash conveying method can be carried out through various methods such as the double-tube dense phase conveying system.

[0003] The double-pipe dense phase conveying system is a pneumatic conveying system for conveying fly ash. It is usually composed of two layers of inner and outer pipes. The inner pipe is used to convey fly ash, and the outer pipe is used to protect and support the inner pipe. The advantage of the double-pipe conveying system is stable long-distance transportation. However, since the inner and outer pipes of the double-pipe are connected together by welding, long-term operation and cyclic loads may cause fatigue of the double-pipe material, and the strength of the pipeline material may decrease due to corrosion and wear during long-term use. The above reasons will cause the inner pipe to fall off and cause pipe blockage, which needs to be improved. Summary of the invention

[0004] 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.

[0005] The present invention is proposed in view of the fact that the connection structure of the above-mentioned existing double-tube dense phase conveying system may cause fatigue of the double-tube material due to long-term operation and cyclic load, and the pipeline material may reduce its strength due to corrosion and wear during long-term use, causing the inner tube to fall off and causing pipe blockage.

[0006] Therefore, the purpose of the present invention is to provide a connection structure of a double-tube dense phase conveying system, which aims to solve the problem that the inner tube may fall off and cause tube blockage.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a main unit, including a delivery pipe, an inner liner pipe arranged on the inner wall of the delivery pipe, an oblique opening arranged on the inner liner pipe, a circular hole sheet arranged on the inner wall of the inner liner pipe, and two flanges arranged on the delivery pipe;

[0008] The connecting unit includes a connecting component arranged on the inner liner pipe, a fixing component arranged on the flange and matched with the connecting component, a clamping component arranged inside the fixing component, and a pushing component arranged inside the fixing component and matched with the clamping component.

[0009] As a preferred solution of the connection structure of the double-tube dense phase conveying system of the present invention, the connection assembly includes an opening arranged on the inner liner pipe, a slot arranged on the flange, and a sealing ring arranged on the inner wall of the inner liner pipe.

[0010] As a preferred solution of the connection structure of the double-tube dense phase conveying system described in the present invention, the connection assembly also includes a connecting plate arranged on the sealing ring and adapted to the opening, a circular plate arranged on the connecting plate and adapted to the slot, and an arc-shaped sealing gasket arranged on the connecting plate.

[0011] As a preferred solution of the connection structure of the double-tube dense phase conveying system described in the present invention, the fixing assembly includes three fixing columns arranged on the flange, a through hole arranged on the flange and connected to the slot, and a convex column arranged on the fixing column and adapted to the through hole.

[0012] As a preferred solution of the connection structure of the double-tube dense phase conveying system described in the present invention, a rectangular cavity is opened inside the fixed column and the convex column, the positions of the three fixed columns correspond to the positions of the three slots respectively, and a connecting hole adapted to the convex column is opened on the circular plate.

[0013] As a preferred solution of the connection structure of the double-tube dense phase conveying system described in the present invention, the snap-in assembly includes two sliding openings arranged on the convex column and connected to the rectangular cavity, a snap-in plate arranged inside the sliding opening, and a socket arranged on the circular plate and adapted to the snap-in plate.

[0014] As a preferred solution of the connection structure of the double-tube dense phase conveying system described in the present invention, the clamping assembly also includes two fixed rods arranged inside the rectangular cavity, a sliding plate arranged on the clamping plate and connected to the fixed rods, and a pressure spring arranged on the sliding plate and connected to the inner wall of the rectangular cavity.

[0015] As a preferred solution of the connection structure of the double-tube dense phase conveying system of the present invention, one side of the clamping plate is inclined, and the two clamping plates are oppositely arranged.

[0016] As a preferred solution of the connection structure of the double-tube dense phase conveying system described in the present invention, the pushing assembly includes a screw rod arranged inside the rectangular cavity, a threaded sleeve arranged on the screw rod, and a pushing plate arranged on the threaded sleeve and cooperating with the connecting plate.

[0017] As a preferred solution of the connection structure of the double-tube dense phase conveying system of the present invention, the pushing assembly further includes two slide grooves arranged on the inner wall of the rectangular cavity, and a sliding block arranged on the pushing plate and cooperating with the slide grooves.

[0018] The beneficial effects of the present invention are as follows: by setting a connecting unit, utilizing structures such as the screw rod, the clamping plate, the socket, the circular plate, etc. on the connecting unit, and by connecting and fixing the two ends of the inner liner pipe to the flange on the basis of the original welding method of the inner liner pipe and the conveying pipe, the firmness of the connection of the inner liner pipe is enhanced, and the situation in which the inner liner pipe falls off due to fatigue of the device due to the connection method between the inner liner pipe and the conveying pipe only through welding is avoided, and the practicality is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the connection assembly of the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of the connecting component and the fixing component of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the fixing assembly of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the fixing component and the pushing component of the present invention.

[0026] Figure 7It is a schematic diagram of the structure of the pushing assembly and the clamping assembly of the present invention. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example 1, reference Figures 1 to 7 , which is the first embodiment of the present invention, provides a connection structure of a double-tube dense phase conveying system, the device includes a main unit 100, including a conveying pipe 101, an inner liner pipe 102 arranged on the inner wall of the conveying pipe 101, an oblique mouth 103 arranged on the inner liner pipe 102, a circular hole plate 104 arranged on the inner wall of the inner liner pipe 102, and two flanges 105 arranged on the conveying pipe 101; a connecting unit 200, including a connecting component 201 arranged on the inner liner pipe 102, a fixing component 202 arranged on the flange 105 and matched with the connecting component 201, a clamping component 203 arranged inside the fixing component 202, and a pushing component 204 arranged inside the fixing component 202 and matched with the clamping component 203.

[0032] As the name implies, the double-tube is to install an inner liner 102 in the dense phase conveying pipe 101, and the inner liner 102 is fixed in the conveying pipe 101 by welding. There are specially designed bevels 103 at intervals in the inner liner 102, and a circular hole sheet 104 is vertically arranged in the center of each bevel 103. The conveying air flowing into the inner liner 102 generates turbulence in the conveying pipe 101 as much as possible under the action of the circular hole sheet 104, so that the material and air are continuously and fully fluidized and mixed, which is convenient for conveying.

[0033] If a material pile is formed in a certain section of the conveying pipe 101 during material transportation, the local pressure resistance increases, and local high air pressure is generated. The high air pressure causes more air to bypass and flow into the inner liner pipe 102, forming a stronger turbulence at the inner pipe opening 201a before and after the material pile, thereby loosening the accumulated material pile and eliminating the blockage. This unique technology enables the conveying gas to generate self-regulating and orderly turbulence in the pipeline. If the conveying material forms a pipe blockage in the pipeline, the air flow velocity increases, forcing most of the compressed air carrying a small amount of conveying material to enter the inner liner pipe 102 through the upper small tube opening. At the next opening, the circular hole sheet 104 blocks most of the air from entering the conveying pipe 101, forming turbulence and dispersing the accumulated materials. In this way, the pipe blockage is dispersed as soon as it is formed, resulting in automatic clearing, and then the pipeline transportation can be restarted.

[0034] The advantage of the double-tube conveying system is that it is stable in long-distance transportation, and the system can give full play to its own advantages. However, after long-term use, the disadvantages of the double-tube itself will become obvious. The double-tube manufacturing process is more, the cost is high, the installation process requirements are high, and the inner liner 102 is relatively easy to fall off, causing pipe blockage, which is not easy to remove. In addition, the double-tube solution is currently seriously worn out during operation, and the double-tube falling off causes pipe blockage, and the maintenance workload is large, so it needs to be improved.

[0035] The two flanges 105 are respectively mounted and fixedly connected to the two ends of the outer surface of the conveying pipe 101 . The liner pipe 102 is located at the top of the inner surface of the conveying pipe 101 , and the outer surface of the liner pipe 102 is fixedly connected to the inner surface of the liner pipe 102 .

[0036] When in use, the connection component 201 is used to make the liner pipe 102 and the flange 105 on the conveying pipe 101 correspond in position. By using the fixing component 202, the clamping component 203 and the pushing component 204 in coordination, the liner pipe 102 can be fixedly connected to the two flanges 105 on the conveying pipe 101. Then, in combination with the original welding method, the firmness of the connection of the liner pipe 102 can be enhanced to prevent the liner pipe 102 from falling off and causing pipe blockage.

[0037] Example 2, reference Figures 1 to 5, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the connecting component 201 includes an opening 201a arranged on the inner liner tube 102, a slot 201b arranged on the flange 105, and a sealing ring 201c arranged on the inner wall of the inner liner tube 102; wherein, the opening 201a is opened at both ends of the inner liner tube 102, and three openings 201a are opened at both ends of the inner liner tube 102, the number and position of the slots 201b and the openings 201a correspond, and the sealing ring 201c is fixedly connected to the inner surface of the inner liner tube 102. Through the setting of the sealing ring 201c, air leakage at the opening 201a of the inner liner tube 102 can be avoided, thereby ensuring the sealing of the ash conveying of the inner liner tube 102.

[0038] Furthermore, the connection assembly 201 also includes a connection plate 201d arranged on the sealing ring 201c and adapted to the opening 201a, a circular plate 201e arranged on the connection plate 201d and adapted to the slot 201b, and an arc-shaped sealing gasket 201f arranged on the connection plate 201d; wherein, the number of the connection plates 201d is three, which is the same as the number of the slots 201b and the openings 201a, and the connection plate 201d is fixedly connected to the sealing ring 201c, and the three connection plates 201d and the openings 201a are located at three positions on the top and both sides of the liner tube 102, because the liner tube 102 is fixedly welded At the top of the inner surface of the conveying pipe 101, it is fixedly connected by connecting plates 201d in three directions, which can further enhance the firmness between the liner pipe 102 and the conveying pipe 101; the connecting plate 201d and the circular plate 201e are fixedly connected, the arc-shaped sealing gasket 201f is fixedly connected to the connecting plate 201d, and the arc-shaped sealing gasket 201f is tightly fixed on the outer wall of the inner liner pipe 102, and the width of the arc-shaped sealing gasket 201f and the sealing ring 201c are both greater than the width of the opening 201a, thereby avoiding air leakage at the opening 201a of the inner liner pipe 102, thereby ensuring the sealing of the ash conveying of the inner liner pipe 102.

[0039] Furthermore, the fixing assembly 202 includes three fixing columns 202a arranged on the flange 105, a through hole 202b arranged on the flange 105 and connected to the slot 201b, and a convex column 202c arranged on the fixing column 202a and adapted to the through hole 202b; wherein the fixing column 202a is fixedly connected to the flange 105, the convex column 202c is fixedly connected to the fixing column 202a, and one end of the convex column 202c passes through the through hole 202b and extends into the slot 201b.

[0040] Furthermore, a rectangular cavity 202d is provided inside the fixed column 202a and the convex column 202c, and the positions of the three fixed columns 202a correspond to the positions of the three slots 201b respectively. A connecting hole 202e adapted to the convex column 202c is provided on the circular plate 201e; wherein the connecting hole 202e and the convex column 202c are slidably connected.

[0041] When in use, after the liner pipe 102 is fixedly connected to the flange 105 by means of the fixing assembly 202, the clamping assembly 203 and the pushing assembly 204, the flanges 105 on the two sections of the conveying pipe 101 can be connected.

[0042] The remaining structures are the same as those of Example 1.

[0043] Example 3, reference Figures 1 to 7 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the snap-in assembly 203 includes two sliding openings 203a arranged on the boss 202c and connected to the rectangular cavity 202d, a snap-in plate 203b arranged inside the sliding opening 203a, and a socket 203c arranged on the circular plate 201e and adapted to the snap-in plate 203b; wherein, the two sliding openings 203a are respectively opened on the front and rear sides of the outer surface of the boss 202c, the snap-in plate 203b and the sliding opening 203a are slidably connected, the socket 203c is opened on the inner surface of the connecting hole 202e, and the socket 203c and the snap-in plate 203b are slidably connected; the fixed connection of the circular plate 201e and the inner liner pipe 102 can be achieved by entering the socket 203c through the snap-in plate 203b.

[0044] Furthermore, the clamping assembly 203 also includes two fixed rods 203d arranged inside the rectangular cavity 202d, a sliding plate 203e arranged on the clamping plate 203b and connected to the fixed rods 203d, and a pressure spring 203f arranged on the sliding plate 203e and connected to the inner wall of the rectangular cavity 202d; wherein the two ends of the fixed rod 203d are respectively fixedly connected to the two walls of the rectangular cavity 202d, and the clamping plate 203b is provided with a movable groove. Since the screw rod 204a in the pushing assembly 204 is located in the rectangular cavity 202d The clamping plate 203b is in the middle position inside the socket 203c, and before entering the socket 203c, it is inside the rectangular cavity 202d, and then through the setting of the movable groove, the connecting plate 201d can avoid the movement of the screw rod 204a, so as to prevent the screw rod 204a from blocking the normal operation of the connecting plate 201d; through the setting of the pressure spring 203f, the clamping plate 203b can automatically detach from the socket 203c and enter the rectangular cavity 202d under the elastic force of the pressure spring 203f when it is not restricted by the extrusion of the pushing plate 204c.

[0045] Furthermore, one side of the snap-in plate 203b is inclined, and the two snap-in plates 203b are relatively arranged; wherein, the two connecting plates 201d, the socket 203c, and the slide 203a are arranged in a high and low staggered manner. Due to the limited space of the rectangular frame, the two snap-in plates 203b can be completely retracted into the rectangular cavity 202d through the height staggered arrangement.

[0046] Furthermore, the pushing assembly 204 includes a screw rod 204a disposed inside the rectangular cavity 202d, a threaded sleeve 204b disposed on the screw rod 204a, and a pushing plate 204c disposed on the threaded sleeve 204b and matched with the connecting plate 201d; wherein one end of the screw rod 204a is rotatably connected to the inner wall of the rectangular cavity 202d through a bearing, and the other end of the screw rod 204a passes through the fixed column 202a and is fixedly connected with a screw handle, which facilitates the connection operation of the staff, and the threaded sleeve 204b and the screw rod 204a are connected. There is a threaded connection between them, and two pushing plates 204c are arranged on the threaded sleeve 204b, and the two pushing plates 204c are also arranged in a staggered height, so as to facilitate the use with two clamping plates 203b of different heights. The bottom of the pushing plate 204c is arranged to be an inclined surface with the same inclination angle as the clamping plate 203b. The threaded sleeve 204b and the pushing plate 204c are driven to approach the clamping plate 203b by the rotation of the screw rod 204a, so as to push them into the socket 203c to realize the fixed connection of the inner liner pipe 102.

[0047] Furthermore, the pushing assembly 204 also includes two slide grooves 204d arranged on the inner wall of the rectangular cavity 202d, and a sliding block 204e arranged on the pushing plate 204c and cooperating with the slide grooves 204d; wherein, through the setting of the slide grooves 204d and the sliding block 204e, the moving direction of the threaded sleeve 204b and the pushing plate 204c can be limited when the screw rod 204a rotates, so that they can only slide along the slide grooves 204d.

[0048] When in use, the threaded sleeve 204b and the pushing plate 204c are driven to move toward the clamping plate 203b by rotating the screw rod 204a. As the pushing plate 204c moves to a certain position, the pushing plate 204c will gradually squeeze and push the two clamping plates 203b to move in the opposite direction, thereby entering the two sockets 203c respectively, thereby realizing a fixed connection between the liner pipe 102 and the flange 105.

[0049] The remaining structure is the same as that of Example 2.

[0050] 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.

[0051] 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.

[0052] 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 connection structure of a double-tube dense phase conveying system, characterized in that: include, The main unit (100) comprises a conveying pipe (101), an inner lining pipe (102) arranged on the inner wall of the conveying pipe (101), an oblique opening (103) arranged on the inner lining pipe (102), a circular hole sheet (104) arranged on the inner wall of the inner lining pipe (102), and two flanges (105) arranged on the conveying pipe (101); The connecting unit (200) comprises a connecting component (201) arranged on the inner liner tube (102), a fixing component (202) arranged on the flange (105) and matched with the connecting component (201), a snap-fit ​​component (203) arranged inside the fixing component (202), and a pushing component (204) arranged inside the fixing component (202) and matched with the snap-fit ​​component (203).

2. The connection structure of the double-tube dense phase conveying system according to claim 1 is characterized in that: The connection assembly (201) comprises an opening (201a) arranged on the inner liner tube (102), a slot (201b) arranged on the flange (105), and a sealing ring (201c) arranged on the inner wall of the inner liner tube (102).

3. The connection structure of the double-tube dense phase conveying system according to claim 2 is characterized in that: The connection assembly (201) further comprises a connection plate (201d) arranged on the sealing ring (201c) and adapted to the opening (201a), a circular plate (201e) arranged on the connection plate (201d) and adapted to the slot (201b), and an arc-shaped sealing gasket (201f) arranged on the connection plate (201d).

4. The connection structure of the double-tube dense phase conveying system according to claim 3 is characterized in that: The fixing assembly (202) comprises three fixing columns (202a) arranged on the flange (105), a through hole (202b) arranged on the flange (105) and connected to the slot (201b), and a convex column (202c) arranged on the fixing column (202a) and adapted to the through hole (202b).

5. The connection structure of the double-tube dense phase conveying system according to claim 4 is characterized in that: A rectangular cavity (202d) is provided inside the fixing column (202a) and the convex column (202c); the positions of the three fixing columns (202a) respectively correspond to the positions of the three slots (201b); and a connecting hole (202e) adapted to the convex column (202c) is provided on the circular plate (201e).

6. The connection structure of the double-tube dense phase conveying system according to claim 5, characterized in that: The snap-on assembly (203) comprises two sliding openings (203a) arranged on the convex column (202c) and connected to the rectangular cavity (202d), a snap-on plate (203b) arranged inside the sliding opening (203a), and a socket (203c) arranged on the circular plate (201e) and adapted to the snap-on plate (203b).

7. The connection structure of the double-tube dense phase conveying system according to claim 6, characterized in that: The clamping assembly (203) further comprises two fixing rods (203d) arranged inside the rectangular cavity (202d), a sliding plate (203e) arranged on the clamping plate (203b) and connected to the fixing rods (203d), and a pressure spring (203f) arranged on the sliding plate (203e) and connected to the inner wall of the rectangular cavity (202d).

8. The connection structure of the double-tube dense phase conveying system according to claim 7, characterized in that: One side of the clamping plate (203b) is arranged obliquely, and the two clamping plates (203b) are arranged opposite to each other.

9. The connection structure of the double-tube dense phase conveying system according to claim 8, characterized in that: The pushing assembly (204) comprises a screw rod (204a) arranged inside the rectangular cavity (202d), a threaded sleeve (204b) arranged on the screw rod (204a), and a pushing plate (204c) arranged on the threaded sleeve (204b) and matched with the connecting plate (201d).

10. The connection structure of the double-tube dense phase conveying system according to claim 9, characterized in that: The pushing component (204) further comprises two slide grooves (204d) arranged on the inner wall of the rectangular cavity (202d), and a sliding block (204e) arranged on the pushing plate (204c) and cooperating with the slide grooves (204d).

Images