A pipeline connecting structure of a thermal power boiler

Abstract

The application discloses a pipeline connecting structure of a thermal power boiler, which comprises a connecting sleeve used for connecting two pipeline bodies, limit wrapping rings are fixed at two ends of the connecting sleeve, the inner walls of the two limit wrapping rings are fixed with expansion sealing rings, the surfaces of the two pipeline bodies are embedded with outer sealing rings used in cooperation with the expansion sealing rings, and the expansion sealing rings are designed as hollow. The application relates to the technical field of pipeline connection. In the connecting process, the driving push rod is in contact with the floating plate and extrudes the floating plate when the pipeline body enters into the connecting sleeve, the floating plate is pressed and then rotates, the air in the air supply cylinder is discharged, the air is filled into the two expansion sealing rings, the expansion sealing rings are inflated and expanded, the outer sealing rings are tightly attached to the expansion sealing rings, and the sealing is strengthened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline connection, in particular to a power boiler pipeline connection structure. BACKGROUND

[0002] The power boiler is a boiler used in a thermal power station, and the boiler is an energy conversion device, and the energy input into the boiler includes chemical energy in fuel and electric energy, and the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy. When connecting the pipeline of a small power boiler, a flange plate is generally used for assembly connection. In the connection process, the traditional method generally adopts the assembly mode of bolts and nuts. In actual use, the assembly efficiency is low, and the traditional assembly connection generally only forms a simple extrusion contact type seal. When the flow rate of the gas or liquid in the pipeline is accelerated, the traditional sealing structure is simple, and a simple sealing ring is generally used for contact sealing. In the actual use process, leakage may occur. Therefore, the present application provides a power boiler pipeline connection structure to solve the above-mentioned problems. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a power boiler pipeline connection structure to solve the above-mentioned problems in the background art.

[0004] To achieve the above object, the present application is implemented by the following technical scheme: a power boiler pipeline connection structure, comprising a connecting sleeve for connecting two pipeline bodies, the two ends of the connecting sleeve are fixed with limiting wrapping rings, the inner walls of the two limiting wrapping rings are fixed with expansion sealing rings, the surfaces of the two pipeline bodies are embedded with outer sealing rings used in cooperation with the expansion sealing rings, the expansion sealing ring is designed as a hollow structure, and the inner wall of the expansion sealing ring is provided with a magnetic powder layer, the surface of the outer sealing ring is provided with an iron powder layer used in cooperation with the magnetic powder layer, a tight air supply unit is arranged on the connecting sleeve, the tight air supply unit is used to automatically control the inflow of air into the two expansion sealing rings when the pipeline body is connected with the connecting sleeve, and a locking sealing unit is further arranged between the connecting sleeve and the two pipeline bodies, the locking sealing unit is used to quickly connect the pipeline body and the connecting sleeve and form a preliminary seal.

[0005] Preferably, the abutting gas supply unit comprises a floating plate rotatably installed on the inner wall of the connecting sleeve, a reset tension spring fixed between the floating plate and the connecting sleeve, a stop lever fixed on the inner wall of the connecting sleeve for limiting the floating plate, a gas supply folding cylinder fixed on the connecting sleeve, a push gas plug slidably installed on the inner wall of the gas supply folding cylinder, a connecting block fixed on one side of the push gas plug, a connecting rod rotatably installed on the surface of the connecting block, the connecting rod being rotatably connected with the floating plate, a conduit fixed between two limiting wrapping rings, the conduit being in communication with the outer periphery of the two expansion sealing rings respectively, a connecting pipe in communication with one end of the gas supply folding cylinder, the connecting pipe being in communication with the surface of the conduit, and a driving push rod fixed on the inner wall of one of the pipe bodies and matched with the floating plate.

[0006] Preferably, the locking sealing unit comprises a folding lever fixed on the surface of the two pipe bodies, an insertion ring fixed on the surface of the connecting sleeve on both sides through a support rod and matched with the folding lever for use, a supporting flap fixed on the surface of the connecting sleeve, movable rods slidingly penetrating through the supporting flap, locking triangular blocks fixed on the bottom ends of the two movable rods, annular locking grooves provided on the surface of the folding lever and matched with the locking triangular blocks for use, spring washers fixed on the surface of the movable rods, locking springs sleeved on the surface of the movable rods, a first abutting sealing ring fixed on the end of the pipe body, and a second abutting sealing ring fixed on the inner wall of the connecting sleeve and matched with the first abutting sealing ring for use.

[0007] Preferably, the side surface of the first abutting sealing ring is provided with a sealing convex ring, and the side surface of the second abutting sealing ring is provided with a sealing concave ring groove matched with the sealing convex ring for use.

[0008] Preferably, the sealing convex ring is integrally formed with the first abutting sealing ring, the cross section of the sealing convex ring is in the shape of a circular truncated cone, and the sealing concave ring groove is a gradually changing annular groove, the size of the inner part of the groove being smaller than that of the outer part.

[0009] Preferably, the locking triangular block is in the shape of a right-angled triangle, and the outer side of the locking triangular block is in the shape of an inclined surface.

[0010] Preferably, the openings of the mutually close parts of the two pipe bodies are smaller than the size of the pipe body itself, so that the pipe body can be limited when connected with the connecting sleeve.

[0011] Preferably, one end of the locking spring is fixed above the supporting flap, and the other end of the locking spring is fixed with the spring washer.

[0012] Beneficial effects

[0013] The application provides a pipeline connecting structure of a thermal power boiler.

[0014] The pipeline connecting structure of the thermal power boiler, in the connecting process, the driving push rod will contact and extrude the floating plate when entering into the connecting sleeve with the pipeline body, the floating plate will rotate after being pressed, and then the air in the air supply fold cylinder can be discharged, the air can be filled into the two expansion sealing rings, and then the expansion sealing ring is inflated and expanded, and the outer sealing ring is adhered to be more tightly, so that the sealing is strengthened, the good sealing effect can be achieved, the leakage phenomenon can be avoided, and the setting of the locking sealing unit facilitates the quick assembly and disassembly of the pipeline body, the pipeline body assembly efficiency is higher, and at the same time, the preliminary sealing work of the pipeline body and the connecting sleeve can be realized, the sealing is further strengthened, and when one group of sealing structures fails, the normal use is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a split diagram of the overall structure of the application;

[0016] Figure 2 is a schematic diagram of the external structure of the connecting sleeve of the application;

[0017] Figure 3 is a schematic diagram of the external structure of the pipeline body of the application;

[0018] Figure 4 is a schematic diagram of the internal structure of the connecting sleeve of the application;

[0019] Figure 5 is a schematic diagram of the internal structure of the connecting sleeve of the application; Figure 4 is a local enlarged view of A in the application;

[0020] Figure 6 is a local enlarged view of B in the application; Figure 4

[0021] Figure 7 is a schematic diagram of the air supply fold cylinder structure of the application;

[0022] Figure 8 is a schematic diagram of the local structure of the locking sealing unit of the application;

[0023] Figure 9 is a sectional view of the first adhering sealing ring of the application;

[0024] Figure 10 is a sectional view of the second adhering sealing ring of the application.

[0025] ​In the figure: 1-pipeline body, 2-connection sleeve, 3-limiting wrapping ring, 4-expansion sealing ring, 5-outer sealing ring, 6-magnetic powder layer, 7-iron powder layer, 8-tightness air supply unit, 81-floating plate, 82-resetting tension spring, 83-stop lever, 84-air supply cylinder, 85-air pushing plug, 86-connection block, 87-connecting rod, 88-conduit, 89-connecting pipe, 810-driving push rod, 9-locking sealing unit, 91-folding lever, 92-inserting ring, 93-supporting folding plate, 94-movable lever, 95-locking triangular block, 96-annular locking groove, 97-spring washer, 98-locking spring, 99-first close-contact sealing ring, 910-second close-contact sealing ring, 911-sealing convex ring, 912-sealing concave ring groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0027] Please refer to Figures 1-10 The present application provides the following technical solutions: Embodiment 1

[0028] The pipeline connecting structure of the thermal power boiler comprises a connection sleeve 2 for connecting two pipeline bodies 1, the opening of the part close to each other of the two pipeline bodies 1 is smaller than the size of the pipeline body 1 itself, thereby facilitating the limiting of the pipeline body 1 when connected with the connection sleeve 2, the two ends of the connection sleeve 2 are fixed with limiting wrapping rings 3, the inner walls of the two limiting wrapping rings 3 are fixed with expansion sealing rings 4, the surfaces of the two pipeline bodies 1 are embedded and fixed with outer sealing rings 5 used in cooperation with the expansion sealing rings 4, the expansion sealing rings 4 are designed as hollow, and the inner walls thereof are provided with magnetic powder layers 6, the surfaces of the outer sealing rings 5 are provided with iron powder layers 7 used in cooperation with the magnetic powder layers 6, the connection sleeve 2 is provided with a tightness air supply unit 8, which is used for automatically controlling the filling of air into the interiors of the two expansion sealing rings 4 when the pipeline body 1 is connected with the connection sleeve 2.

[0029] In the embodiment, the inflation sealing ring 4 is a hollow annular sealing ring which can be inflated after being inflated and can restore the original shape after the gas is discharged. The cross section of the limiting wrapping ring 3 is L-shaped. The design of this shape can avoid the inflation sealing ring 4 expanding horizontally when it is deformed. The limiting of the limiting wrapping ring 3 makes the inflation sealing ring 4 only expand in the vertical direction, so as to realize the close fit with the outer sealing ring 5, thereby realizing the effect of strengthening the sealing. The setting of the magnetic powder layer 6 and the iron powder layer 7 makes the inflation sealing ring 4 and the outer sealing ring 5 contact and fit in the initial state.

[0030] The abutting gas supply unit 8 comprises a floating plate 81 rotatably installed on the inner wall of the connecting sleeve 2. The reset tension spring 82 is fixed between the floating plate 81 and the connecting sleeve 2. The inner wall of the connecting sleeve 2 is fixed with a stop rod 83 for limiting the floating plate 81. The gas supply cylinder 84 is fixedly penetrated on the connecting sleeve 2. The inner wall of the gas supply cylinder 84 is slidably installed with a push plug 85. The connecting block 86 is fixed on one side of the push plug 85. The connecting block 86 is rotatably installed with a connecting rod 87. The connecting rod 87 is rotatably connected with the floating plate 81. The conduit 88 is fixedly penetrated between the two limiting wrapping rings 3. The two ends of the conduit 88 are respectively communicated with the outer circumferences of the two inflation sealing rings 4. One end of the gas supply cylinder 84 is communicated with the connecting pipe 89. The end of the connecting pipe 89 is communicated with the surface of the conduit 88. The inner wall of one of the pipeline bodies 1 is fixed with the driving push rod 810 which is used in cooperation with the floating plate 81.

[0031] In the embodiment, the driving push rod 810 will contact and press the floating plate 81 when the pipeline body 1 enters the connecting sleeve 2. The floating plate 81 will rotate after being pressed, thereby pushing the push plug 85 to displace, so that the air in the gas supply cylinder 84 can be discharged, and the air can be filled into the two inflation sealing rings 4, thereby realizing the inflation of the inflation sealing ring 4 after being inflated, and the close fit with the outer sealing ring 5 will be more tight, thereby realizing the effect of strengthening the sealing. The push plug 85 and the gas supply cylinder 84 have good sealing property. The reset tension spring 82 can conveniently reverse the floating plate 81. The gas supply cylinder 84 stores air, and each pipeline stores air. The setting of the whole abutting gas supply unit 8 can effectively prevent the external air and moisture from entering the connecting sleeve 2. Embodiment 2

[0032] The utility model provides a kind of fire power boiler pipeline connecting structure, including the connecting sleeve 2 for connecting two pipeline bodies 1, the opening of the part of two pipeline bodies 1 close to each other is less than the size of pipeline body 1 itself, in turn facilitate when being connected with connecting sleeve 2, the limiting wrapping ring 3 of two ends of connecting sleeve 2 is fixed, the inner wall of two limiting wrapping rings 3 is fixed with expansion seal ring 4, the surface of two pipeline bodies 1 is embedded and fixed with outer sealing ring 5 used in cooperation with expansion seal ring 4, expansion seal ring 4 is hollow design, its inner wall is provided with magnetic powder layer 6, the surface of outer sealing ring 5 is provided with iron powder layer 7 used in cooperation with magnetic powder layer 6, and air supply unit 8 is provided on connecting sleeve 2, air supply unit 8 is used to automatically control to fill air inside two expansion seal rings 4 when pipeline body 1 is connected with connecting sleeve 2, locking sealing unit 9 is further provided between connecting sleeve 2 and two pipeline bodies 1, and locking sealing unit 9 is used to quickly connect pipeline body 1 and connecting sleeve 2, and preliminary sealing is formed simultaneously.

[0033] In the embodiment, expansion seal ring 4 is annular seal ring of hollow design, can expand after inflation, and can restore original shape after gas discharge, the section of limiting wrapping ring 3 is L type, and the design of this shape can avoid that expansion seal ring 4 expands to horizontal direction when deforming, limiting by limiting wrapping ring 3, so that expansion seal ring 4 can only expand in vertical direction, to realize the close fit with outer sealing ring 5, to realize the effect of strengthening sealing, by the setting of magnetic powder layer 6 and iron powder layer 7, so that expansion seal ring 4 and outer sealing ring 5 are facilitated to contact and fit in initial state.

[0034] Air supply unit 8 includes floating plate 81 rotatably installed on the inner wall of connecting sleeve 2, reset tension spring 82 is fixed between floating plate 81 and connecting sleeve 2, the inner wall of connecting sleeve 2 is fixed with stop rod 83 limiting floating plate 81, air supply cylinder 84 is fixedly penetrated on connecting sleeve 2, push gas plug 85 is slidably installed on the inner wall of air supply cylinder 84, connecting block 86 is fixed on one side of push gas plug 85, connecting block 86 is rotatably installed on the surface of connecting block 86, connecting rod 87 is rotatably connected with floating plate 81, conduit 88 is fixedly penetrated between two limiting wrapping rings 3, the two ends of conduit 88 are communicated with the outer circumferences of two expansion seal rings 4 respectively, and the end of air supply cylinder 84 is communicated with connecting pipe 89, and the end of connecting pipe 89 is communicated with the surface of conduit 88, the inner wall of one of pipeline body 1 is fixed with driving push rod 810 used in cooperation with floating plate 81.

[0035] In this embodiment, the driving push rod 810 will contact and press the floating plate 81 when the pipe body 1 enters into the connecting sleeve 2. The floating plate 81 will rotate after being pressed, and then push the air pushing plug 85 to displace, so that the air in the air supply cylinder 84 can be discharged, and the air can be filled into the two inflation sealing rings 4, and then the inflation sealing rings 4 can be inflated to expand and tightly adhere to the outer sealing ring 5, so as to achieve the effect of strengthening the sealing. The sealing between the air pushing plug 85 and the air supply cylinder 84 is good, and the reset tension spring 82 is arranged to facilitate the reverse rotation of the floating plate 81. The air supply cylinder 84 stores air, and each pipe also stores air. The arrangement of the whole abutting air supply unit 8 effectively prevents external air and moisture from entering the connecting sleeve 2.

[0036] The locking sealing unit 9 comprises a folding rod 91 fixed on the surface of the two pipe bodies 1, and a plug ring 92 cooperating with the folding rod 91 is fixed on the surface of the connecting sleeve 2 on both sides through a supporting rod. The surface of the connecting sleeve 2 is fixed with a supporting flap 93, and the supporting flap 93 is penetrated by a movable rod 94. The bottom end of the two movable rods 94 is fixed with a locking triangular block 95. The surface of the folding rod 91 is provided with an annular locking groove 96 cooperating with the locking triangular block 95. The surface of the movable rod 94 is fixed with a spring washer 97, and the surface of the movable rod 94 is sleeved with a locking spring 98. One end of the locking spring 98 is fixed above the supporting flap 93, and the other end is fixed with the spring washer 97. The end of the pipe body 1 is fixed with a first adhering sealing ring 99, and the inner wall of the connecting sleeve 2 is fixed with a second adhering sealing ring 910 cooperating with the first adhering sealing ring 99. The side surface of the first adhering sealing ring 99 is provided with a sealing convex ring 911, and the side surface of the second adhering sealing ring 910 is provided with a sealing concave ring groove 912 cooperating with the sealing convex ring 911. The sealing convex ring 911 is integrally formed with the first adhering sealing ring 99, and the locking triangular block 95 is a right-angled triangle, and the outer side is designed as an inclined surface.

[0037] In this embodiment, the plug ring 92 is arranged to facilitate the insertion of the folding rod 91. By pressing the locking triangular block 95, the annular locking groove 96 on the folding rod 91 is moved to below the locking triangular block 95. At this time, under the elastic force of the locking spring 98, the locking triangular block 95 can be smoothly clamped into the annular locking groove 96. At this time, the pipe body 1 is blocked by the limiting wrapping ring 3, and the locking of the whole pipe body 1 is realized. At the same time, the first adhering sealing ring 99 can adhere to the second adhering sealing ring 910, the sealing convex ring 911 can be embedded into the sealing concave ring groove 912, the cross section of the sealing convex ring 911 is in the shape of a truncated cone, and the sealing concave ring groove 912 is a gradually changing annular groove, and the size near the inside is smaller than the size of the outside. By adopting this design, on the one hand, the contact area between the first adhering sealing ring 99 and the second adhering sealing ring 910 can be increased to improve the sealing effect, and at the same time, the sealing convex ring 911 can be more smoothly inserted into the sealing concave ring groove 912

[0038] All the sealing structure in the present application has high temperature resistance and corrosion resistance.

[0039] Meanwhile, the contents not described in detail in the present specification are all the prior art known to the person skilled in the art.

[0040] In use, the pipe body 1 end is aligned with the connecting sleeve 2, and the folding rod 91 is aligned with the insertion ring 92 and passes through the insertion ring 92. The folding rod 9 is pressed to make the locking triangular block 95 move upwards until the annular locking groove 96 on the folding rod 91 moves below the locking triangular block 95. At this time, under the elastic force of the locking spring 98, the locking triangular block 95 can be smoothly clamped into the annular locking groove 96. At this time, the pipe body 1 is blocked by the limiting wrapping ring 3, realizing the locking of the entire pipe body 1. The installation mode of the two pipe bodies 1 is the same, and during the locking process, the first abutting sealing ring 99 can abut with the second abutting sealing ring 910, and the sealing convex ring 911 can be embedded into the sealing concave ring groove 912, realizing the preliminary sealing between the pipe body 1 and the connecting sleeve 2. When the pipe body 1 needs to be disassembled, the movable rod 94 is only pulled to move upwards, so that the locking triangular block 95 can be separated from the annular locking groove 96, and the pipe body 1 can be taken out. During the connection process, the driving push rod 810 will contact and press the floating plate 81 when the pipe body 1 enters the connecting sleeve 2. The floating plate 81 is pressed and then rotates, thereby pushing the air plug 85 to displace, so that the air in the air supply folding cylinder 84 can be discharged, and the air can be filled into the two expansion sealing rings 4, thereby realizing that the expansion sealing ring 4 expands after being inflated, and the outer sealing ring 5 is abutted to be more tightly, thereby realizing the reinforced sealing.

[0041] It should be noted that, in the present document, the terms such as first and second, etc. are merely used 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. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0042] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A structure for connecting pipes of a thermal power boiler, comprising a connecting sleeve (2) for connecting two pipe bodies (1), characterized in that: Both ends of the connecting sleeve (2) are fixedly provided with limiting wrapping rings (3), the inner walls of the two limiting wrapping rings (3) are fixedly provided with expansion sealing rings (4), the surfaces of the two pipeline bodies (1) are embeddedly and fixedly provided with outer sealing rings (5) which are used in cooperation with the expansion sealing rings (4), the expansion sealing rings (4) are designed as hollow, the inner walls of the expansion sealing rings (4) are provided with magnetic powder layers (6), the surfaces of the outer sealing rings (5) are provided with iron powder layers (7) which are used in cooperation with the magnetic powder layers (6), the connecting sleeve (2) is provided with abutting air supply units (8), the abutting air supply units (8) are used for automatically controlling air to be filled into the two expansion sealing rings (4) when the pipeline body (1) is connected with the connecting sleeve (2), the connecting sleeve (2) and the two pipeline bodies (1) are further provided with locking sealing units (9), the locking sealing units (9) are used for quickly connecting the pipeline body (1) and the connecting sleeve (2) and simultaneously forming preliminary sealing; The abutting air supply units (8) comprise floating plates (81) which are rotatably installed on the inner walls of the connecting sleeves (2), the floating plates (81) and the connecting sleeves (2) are fixedly provided with return tension springs (82), the inner walls of the connecting sleeves (2) are fixedly provided with stop rods (83) which limit the floating plates (81), the connecting sleeves (2) are fixedly provided with air supply folding barrels (84), the inner walls of the air supply folding barrels (84) are slidably installed with air pushing plugs (85), one side of the air pushing plugs (85) is fixedly provided with connecting blocks (86), the surfaces of the connecting blocks (86) are rotatably installed with connecting rods (87), the connecting rods (87) are rotatably connected with the floating plates (81), the two limiting wrapping rings (3) are fixedly provided with conduits (88), the two ends of the conduits (88) are respectively communicated with the outer circumferences of the two expansion sealing rings (4), one end of the air supply folding barrel (84) is communicated with a connecting pipe (89), the end of the connecting pipe (89) is communicated with the surface of the conduit (88), and the inner walls of one of the pipeline bodies (1) are fixedly provided with driving pushing rods (810) which are used in cooperation with the floating plates (81); The locking sealing units (9) comprise folding rods (91) which are fixedly installed on the surfaces of the two pipeline bodies (1), the surfaces of the connecting sleeves (2) are fixedly provided with inserting rings (92) which are used in cooperation with the folding rods (91) through supporting rods, the surfaces of the connecting sleeves (2) are fixedly provided with supporting folding plates (93), the supporting folding plates (93) are slidably penetrated with movable rods (94), the bottom ends of the two movable rods (94) are fixedly provided with locking triangular blocks (95), the surfaces of the folding rods (91) are provided with annular locking grooves (96) which are used in cooperation with the locking triangular blocks (95), the surfaces of the movable rods (94) are fixedly provided with spring washers (97), the surfaces of the movable rods (94) are sleeved with locking springs (98), the end portions of the pipeline bodies (1) are fixedly provided with first close sealing rings (99), the inner walls of the connecting sleeves (2) are fixedly provided with second close sealing rings (910) which are used in cooperation with the first close sealing rings (99). The side of the first sealing ring (99) is provided with a sealing convex ring (911), and the side of the second sealing ring (910) is provided with a sealing concave ring groove (912) matched with the sealing convex ring (911); The locking triangular block (95) is a right-angled triangle, and the outer side is designed as an inclined surface; The openings of the mutually close parts of the two pipeline bodies (1) are all smaller than the size of the pipeline body (1) itself, thereby facilitating the limiting of the pipeline body (1) when connected with the connecting sleeve (2).

2. A pipe connecting structure for a thermal power boiler according to claim 1, characterized in that: The sealing convex ring (911) is integrally formed with the first sealing ring (99), the cross section shape of the sealing convex ring (911) is a truncated cone shape, and the sealing concave ring groove (912) is a gradually changing annular groove, and the size close to the inside is smaller than the size of the outside.

3. A pipe connecting structure for a thermal power boiler according to claim 1, characterized in that: One end of the locking spring (98) is fixed above the supporting folded plate (93), and the other end is fixed with the spring washer (97).

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