Thermal power boiler pipeline connecting structure

Abstract

The thermal power boiler pipeline connecting structure comprises a connecting sleeve used for connecting two pipeline bodies, limiting wrapping rings are fixed to the two ends of the connecting sleeve correspondingly, and expansion sealing rings are fixed to the inner walls of the two limiting wrapping rings correspondingly; and outer sealing rings matched with the expansion sealing rings for use are fixedly arranged on the surfaces of the two pipeline bodies in an embedded mode, and the expansion sealing rings are designed to be hollow. According to the thermal power boiler pipeline connecting structure, in the connecting process, a driving push rod enters a connecting sleeve along with a pipeline body to make contact with a floating plate and extrude the floating plate, the floating plate rotates after being pressed, and then an air pushing plug is pushed to move, so that air in an air supply folding barrel can be exhausted, two expansion sealing rings can be inflated with air, and the sealing effect is improved. And therefore, the expansion sealing ring expands after being inflated, the expansion sealing ring can be attached to the outer sealing ring more tightly, and sealing is enhanced.

Description

Technical Field

[0001] This invention relates to the field of pipeline connection technology, specifically to a pipeline connection structure for thermal power boilers. Background Technology

[0002] A thermal power boiler is a boiler used in a thermal power plant. A boiler is an energy conversion device; the energy input to the boiler includes the chemical energy of fuel and electrical energy, and the boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. When connecting pipes in small thermal power boilers, flanges are generally used for assembly. Traditionally, bolts and nuts are used for assembly, which is inefficient in practical use. Furthermore, traditional assembly connections typically rely on simple compression contact seals. When the gas or liquid flow rate inside the pipe increases and it is under high pressure for extended periods, the simple structure of traditional seals (usually simple sealing rings) can lead to leakage during actual use. Therefore, this invention proposes a new connection structure for thermal power boiler pipes to solve the aforementioned problems. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a pipe connection structure for thermal power boilers, solving the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a pipe connection structure for a thermal power boiler, comprising a connecting sleeve for connecting two pipe bodies, both ends of the connecting sleeve being fixed with limiting rings, the inner walls of the two limiting rings being fixed with expansion sealing rings, and the surfaces of the two pipe bodies being embedded with and fixed with outer sealing rings that cooperate with the expansion sealing rings. The expansion sealing rings are hollow, with a magnetic powder layer on their inner walls, and the surfaces of the outer sealing rings are provided with an iron powder layer that cooperates with the magnetic powder layer. The connecting sleeve is provided with a pressing air supply unit, which automatically controls the injection of air into the two expansion sealing rings when the pipe bodies are connected to the connecting sleeve. A locking sealing unit is also provided between the connecting sleeve and the two pipe bodies, which is used to quickly connect the pipe bodies and the connecting sleeve, and simultaneously form a preliminary seal.

[0005] Preferably, the air supply unit includes a float plate rotatably mounted on the inner wall of the connecting sleeve, a return spring fixed between the float plate and the connecting sleeve, a stop bar for limiting the float plate fixed on the inner wall of the connecting sleeve, an air supply baffle cylinder fixed through the connecting sleeve, an air pusher plug slidably mounted on the inner wall of the air supply baffle cylinder, a connecting block fixed on one side of the air pusher plug, a connecting rod rotatably mounted on the surface of the connecting block, the connecting rod being rotatably connected to the float plate, a conduit fixed through the two limiting rings, the two ends of the conduit communicating with the outer periphery of the two expansion sealing rings respectively, a connecting pipe communicating with one end of the air supply baffle cylinder, the end of the connecting pipe communicating with the surface of the conduit, and a drive push rod for cooperating with the float plate fixed on the inner wall of one of the pipe bodies.

[0006] Preferably, the locking sealing unit includes a folding rod fixed to the surfaces of two pipe bodies. Both sides of the connecting sleeve surface are fixed with insert rings that cooperate with the folding rods via support rods. A supporting folding plate is fixed to the surface of the connecting sleeve, and a movable rod slides through the supporting folding plate. A locking triangular block is fixed to the bottom end of each of the two movable rods. An annular locking groove that cooperates with the locking triangular block is formed on the surface of the folding rod. A spring washer is fixed to the surface of the movable rod, and a locking spring is sleeved on the surface of the movable rod. A first fitting sealing ring is fixed to the end of the pipe body, and a second fitting sealing ring that cooperates with the first fitting sealing ring is fixed to the inner wall of the connecting sleeve.

[0007] Preferably, the first fitting sealing ring has a sealing protrusion on its side, and the second fitting sealing ring has a sealing groove on its side that cooperates with the sealing protrusion.

[0008] Preferably, the sealing convex ring and the first fitting sealing ring are integrally formed, the cross-sectional shape of the sealing convex ring is frustum-shaped, and the sealing concave ring groove is a gradient annular groove, the size of which is smaller near the inside than the size of the outside.

[0009] Preferably, the locking triangle is a right triangle with a beveled outer side.

[0010] Preferably, the openings of the two pipe bodies that are close to each other are smaller than the size of the pipe bodies themselves, which facilitates the limiting of the pipe bodies when connected to the connecting sleeve.

[0011] Preferably, one end of the locking spring is fixed to the top of the supporting folding plate, and the other end is fixed to the spring washer.

[0012] Beneficial effects This invention provides a pipe connection structure for a thermal power boiler. Compared with the prior art, it has the following advantages: In this thermal power boiler pipeline connection structure, during the connection process, the drive push rod enters the connecting sleeve along with the pipeline body and contacts and squeezes the float plate. After being compressed, the float plate rotates, which in turn pushes the air plug to move, allowing air in the air supply plenum to be discharged and air to be filled into the two expansion sealing rings. This causes the expansion sealing rings to expand after being filled with air, making them fit more tightly with the outer sealing ring, thus achieving a stronger seal and providing a good sealing effect. This can prevent leakage. The locking sealing unit setting facilitates the rapid assembly and disassembly of the pipeline body, making the pipeline assembly more efficient. At the same time, it can achieve the initial sealing work between the pipeline body and the connecting sleeve, and further strengthen the seal. Through the double sealing design, even if one set of sealing structure fails, it will not affect normal use. Attached Figure Description

[0013] Figure 1 This is an exploded view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the external structure of the connecting sleeve of the present invention; Figure 3 This is a schematic diagram of the external structure of the pipe body of the present invention; Figure 4 This is a schematic diagram of the internal structure of the connecting sleeve of the present invention; Figure 5 For the present invention Figure 4 A magnified view of a section at point A in the middle; Figure 6 For the present invention Figure 4 A magnified view of a section at point B in the middle; Figure 7 This is a schematic diagram of the air supply folding cylinder structure of the present invention; Figure 8 This is a partial structural diagram of the locking and sealing unit of the present invention; Figure 9 This is a cross-sectional schematic diagram of the first fitting sealing ring of the present invention; Figure 10 This is a cross-sectional schematic diagram of the second fitting sealing ring of the present invention.

[0014] In the diagram: 1-pipe body, 2-connecting sleeve, 3-limiting wrapping ring, 4-expansion sealing ring, 5-outer sealing ring, 6-magnetic powder layer, 7-iron powder layer, 8-pressing air supply unit, 81-float plate, 82-reset tension spring, 83-stop bar, 84-air supply folding cylinder, 85-push plug, 86-connecting block, 87-connecting rod, 88-conduit, 89-connecting pipe, 810-drive push rod, 9-locking sealing unit, 91-folding rod, 92-insertion ring, 93-supporting folding plate, 94-moving rod, 95-locking triangular block, 96-annular locking groove, 97-spring washer, 98-locking spring, 99-first fitting sealing ring, 910-second fitting sealing ring, 911-sealing convex ring, 912-sealing concave ring groove. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1-10 The present invention provides the following technical solutions: Example 1

[0017] A pipe connection structure for a thermal power boiler includes a connecting sleeve 2 for connecting two pipe bodies 1. The openings of the two pipe bodies 1 that are close to each other are smaller than the size of the pipe bodies 1 themselves, so as to facilitate the limiting of the pipe bodies 1 when connected to the connecting sleeve 2. Both ends of the connecting sleeve 2 are fixed with limiting rings 3. The inner walls of the two limiting rings 3 are fixed with expansion sealing rings 4. The surfaces of the two pipe bodies 1 are embedded with outer sealing rings 5 ​​that cooperate with the expansion sealing rings 4. The expansion sealing rings 4 are hollow and have a magnetic powder layer 6 on their inner walls. The surface of the outer sealing rings 5 ​​is provided with an iron powder layer 7 that cooperates with the magnetic powder layer 6. The connecting sleeve 2 is provided with a pressing air supply unit 8, which is used to automatically control the filling of air into the two expansion sealing rings 4 when the pipe bodies 1 are connected to the connecting sleeve 2.

[0018] In this embodiment, the expansion sealing ring 4 is a hollow annular sealing ring that expands after being inflated and returns to its original shape after the gas is released. The cross-section of the limiting wrapping ring 3 is L-shaped. This design prevents the expansion sealing ring 4 from expanding horizontally when it deforms. The limiting wrapping ring 3 ensures that the expansion sealing ring 4 can only expand vertically, thus achieving a tight fit with the outer sealing ring 5 and enhancing the sealing effect. The magnetic powder layer 6 and the iron powder layer 7 facilitate contact and fit between the expansion sealing ring 4 and the outer sealing ring 5 in the initial state.

[0019] The air supply unit 8 includes a float 81 rotatably mounted on the inner wall of the connecting sleeve 2. A return spring 82 is fixed between the float 81 and the connecting sleeve 2. A stop bar 83 is fixed on the inner wall of the connecting sleeve 2 to limit the float 81. An air supply folding cylinder 84 is fixed through the connecting sleeve 2. An air pusher plug 85 is slidably mounted on the inner wall of the air supply folding cylinder 84. A connecting block 86 is fixed on one side of the air pusher plug 85. A connecting rod 87 is rotatably mounted on the surface of the connecting block 86. The connecting rod 87 is rotatably connected to the float 81. A conduit 88 is fixed through the two limiting rings 3. The two ends of the conduit 88 are respectively connected to the outer periphery of the two expansion sealing rings 4. One end of the air supply folding cylinder 84 is connected to a connecting pipe 89. The end of the connecting pipe 89 is connected to the surface of the conduit 88. A drive push rod 810 that works with the float 81 is fixed on the inner wall of one of the pipe bodies 1.

[0020] In this embodiment, the drive push rod 810, along with the pipe body 1, enters the connecting sleeve 2 and contacts and presses the float plate 81. The float plate 81 rotates under pressure, pushing the air plug 85 to move. This allows air to escape from the air supply baffle 84, enabling air to enter the two expansion sealing rings 4. The expansion sealing rings 4 expand after inflation, resulting in a tighter seal with the outer sealing ring 5, thus enhancing the sealing effect. The air plug 85 and the air supply baffle 84 have a good seal. The reset spring 82 facilitates the reverse reset of the float plate 81. Air is present in the air supply baffle 84 and in each pipe. The entire air supply unit 8 is designed to effectively prevent external air and moisture from entering the connecting sleeve 2. Example 2

[0021] A pipe connection structure for a thermal power boiler includes a connecting sleeve 2 for connecting two pipe bodies 1. The openings of the two pipe bodies 1 that are close to each other are smaller than the size of the pipe bodies 1 themselves, so as to facilitate the limiting of the pipe bodies 1 when connected with the connecting sleeve 2. Both ends of the connecting sleeve 2 are fixed with limiting rings 3. The inner walls of the two limiting rings 3 are fixed with expansion sealing rings 4. The surfaces of the two pipe bodies 1 are embedded with outer sealing rings 5 ​​that cooperate with the expansion sealing rings 4. The expansion sealing rings 4 are hollow and have a magnetic powder layer 6 on their inner walls. The surface of the outer sealing rings 5 ​​is provided with an iron powder layer 7 that cooperates with the magnetic powder layer 6. The connecting sleeve 2 is provided with a pressing air supply unit 8, which is used to automatically control the filling of air into the two expansion sealing rings 4 when the pipe bodies 1 are connected to the connecting sleeve 2. A locking sealing unit 9 is also provided between the connecting sleeve 2 and the two pipe bodies 1. The locking sealing unit 9 is used to quickly connect the pipe bodies 1 and the connecting sleeve 2 and form a preliminary seal at the same time.

[0022] In this embodiment, the expansion sealing ring 4 is a hollow annular sealing ring that expands after being inflated and returns to its original shape after the gas is released. The cross-section of the limiting wrapping ring 3 is L-shaped. This design prevents the expansion sealing ring 4 from expanding horizontally when it deforms. The limiting wrapping ring 3 ensures that the expansion sealing ring 4 can only expand vertically, thus achieving a tight fit with the outer sealing ring 5 and enhancing the sealing effect. The magnetic powder layer 6 and the iron powder layer 7 facilitate contact and fit between the expansion sealing ring 4 and the outer sealing ring 5 in the initial state.

[0023] The air supply unit 8 includes a float 81 rotatably mounted on the inner wall of the connecting sleeve 2. A return spring 82 is fixed between the float 81 and the connecting sleeve 2. A stop bar 83 is fixed on the inner wall of the connecting sleeve 2 to limit the float 81. An air supply folding cylinder 84 is fixed through the connecting sleeve 2. An air pusher plug 85 is slidably mounted on the inner wall of the air supply folding cylinder 84. A connecting block 86 is fixed on one side of the air pusher plug 85. A connecting rod 87 is rotatably mounted on the surface of the connecting block 86. The connecting rod 87 is rotatably connected to the float 81. A conduit 88 is fixed through the two limiting rings 3. The two ends of the conduit 88 are respectively connected to the outer periphery of the two expansion sealing rings 4. One end of the air supply folding cylinder 84 is connected to a connecting pipe 89. The end of the connecting pipe 89 is connected to the surface of the conduit 88. A drive push rod 810 that works with the float 81 is fixed on the inner wall of one of the pipe bodies 1.

[0024] In this embodiment, the drive push rod 810, along with the pipe body 1, enters the connecting sleeve 2 and contacts and presses the float plate 81. The float plate 81 rotates under pressure, pushing the air plug 85 to move. This allows air to escape from the air supply baffle 84, enabling air to enter the two expansion sealing rings 4. The expansion sealing rings 4 expand after inflation, resulting in a tighter seal with the outer sealing ring 5, thus enhancing the sealing effect. The air plug 85 and the air supply baffle 84 have a good seal. The reset spring 82 facilitates the reverse reset of the float plate 81. Air is present in the air supply baffle 84 and in each pipe. The entire air supply unit 8 is designed to effectively prevent external air and moisture from entering the connecting sleeve 2.

[0025] The locking sealing unit 9 includes a folding rod 91 fixed to the surface of two pipe bodies 1. Both sides of the connecting sleeve 2 are fixed with insert rings 92 that cooperate with the folding rod 91 via support rods. A supporting folding plate 93 is fixed to the surface of the connecting sleeve 2. A movable rod 94 slides through the supporting folding plate 93. Locking triangular blocks 95 are fixed to the bottom ends of both movable rods 94. An annular locking groove 96 that cooperates with the locking triangular block 95 is opened on the surface of the folding rod 91. A spring washer 97 is fixed to the surface of the movable rod 94. A locking spring 98 is sleeved on the surface of the movable rod 94. One end of the locking spring 98 is fixed to the top of the supporting folding plate 93, and the other end is fixed to the spring washer 97. A first fitting sealing ring 99 is fixed to the end of the pipe body 1. A second fitting sealing ring 910 that cooperates with the first fitting sealing ring 99 is fixed to the inner wall of the connecting sleeve 2. The first fitting sealing ring 99 has a sealing protrusion 911 on its side, and the second fitting sealing ring 910 has a sealing groove 912 on its side that mates with the sealing protrusion 911. The sealing protrusion 911 and the first fitting sealing ring 99 are integrally formed, and the locking triangular block 95 is a right triangle with a beveled outer surface.

[0026] In this embodiment, the insert ring 92 is provided to facilitate the insertion of the folding rod 91. By squeezing the locking triangular block 95, the annular locking groove 96 on the folding rod 91 moves 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 smoothly engage into the annular locking groove 96. At this time, the pipe body 1 is blocked by the limiting ring 3, realizing the locking of the entire pipe body 1. At the same time, the first fitting sealing ring 99 can fit with the second fitting sealing ring 910, and the sealing convex ring 911 can be embedded into the sealing concave ring groove 912. The cross-sectional shape of the sealing convex ring 911 is frustum-shaped, and the sealing concave ring groove 912 is a gradually changing annular groove, with its inner dimension being smaller than its outer dimension. This design increases the contact area between the first fitting sealing ring 99 and the second fitting sealing ring 910, thereby improving the sealing effect. At the same time, the sealing convex ring 911 can be inserted into the sealing concave ring groove 912 more smoothly. All sealing components in this invention have high temperature and corrosion resistance.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] In use, align the end of the pipe body 1 with the connecting sleeve 2, and simultaneously align the bending rod 91 with the insert ring 92 and pass it through the insert ring 92. The bending rod 91 presses against the locking triangular block 95, causing the locking triangular block 95 to move upwards until the annular locking groove 96 on the bending rod 91 moves below the locking triangular block 95. At this point, under the elastic force of the locking spring 98, the locking triangular block 95 can smoothly engage in the annular locking groove 96. The pipe body 1 is then blocked by the limiting ring 3, achieving locking of the entire pipe body 1. The installation method for both pipe bodies 1 is the same. During the locking process, the first fitting sealing ring 99 can fit against the second fitting sealing ring 910, and the sealing convex ring 911 can be embedded into the sealing concave ring groove. In section 912, to achieve a preliminary seal between the pipe body 1 and the connecting sleeve 2, when the pipe body 1 needs to be disassembled, simply pull the movable rod 94 upwards so that the locking triangular block 95 can disengage from the annular locking groove 96, and the pipe body 1 can be removed. During the connection process, the drive push rod 810 enters the connecting sleeve 2 along with the pipe body 1 and contacts and squeezes the float plate 81. After being pressed, the float plate 81 rotates, which in turn pushes the air plug 85 to move, thereby allowing the air in the air supply plenum 84 to be discharged, allowing air to be filled into the two expansion sealing rings 4. As a result, the expansion sealing rings 4 expand after being filled with air, and when they fit more tightly with the outer sealing ring 5, a stronger seal is achieved.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipe connection structure for 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 fixed with limiting rings (3), and the inner walls of the two limiting rings (3) are fixed with expansion sealing rings (4). The surfaces of the two pipe bodies (1) are embedded with outer sealing rings (5) that cooperate with the expansion sealing rings (4). The expansion sealing rings (4) are hollow and have a magnetic powder layer (6) on their inner walls. The surfaces of the outer sealing rings (5) have an iron powder layer (7) that cooperates with the magnetic powder layer (6). The connecting sleeve (2) is provided with a pressing air supply unit (8). The pressing air supply unit (8) is used to automatically control the filling of air into the two expansion sealing rings (4) when the pipe body (1) is connected to the connecting sleeve (2). A locking sealing unit (9) is also provided between the connecting sleeve (2) and the two pipe bodies (1). The locking sealing unit (9) is used to quickly connect the pipe body (1) and the connecting sleeve (2) and form a preliminary seal at the same time.

2. The pipe connection structure for a thermal power boiler according to claim 1, characterized in that: The air supply unit (8) includes a float (81) rotatably mounted on the inner wall of the connecting sleeve (2). A return spring (82) is fixed between the float (81) and the connecting sleeve (2). A stop bar (83) for limiting the float (81) is fixed on the inner wall of the connecting sleeve (2). An air supply plenum (84) is fixed through the connecting sleeve (2). An air pusher (85) is slidably mounted on the inner wall of the air supply plenum (84). A connecting block (86) is fixed on one side of the air pusher (85). A connecting rod (87) is rotatably mounted on the surface of the float (81). The connecting rod (87) is rotatably connected to the float (81). A conduit (88) is fixed through the two limiting rings (3). The two ends of the conduit (88) are respectively connected to the outer periphery of the two expansion sealing rings (4). One end of the air supply plenum (84) is connected to a connecting pipe (89). The end of the connecting pipe (89) is connected to the surface of the conduit (88). A drive push rod (810) that works with the float (81) is fixed on the inner wall of one of the pipe bodies (1).

3. The pipe connection structure for a thermal power boiler according to claim 1, characterized in that: The locking sealing unit (9) includes a folding rod (91) fixed to the surface of two pipe bodies (1). Both sides of the surface of the connecting sleeve (2) are fixed with insert rings (92) that cooperate with the folding rod (91) by support rods. The surface of the connecting sleeve (2) is fixed with a supporting folding plate (93). A movable rod (94) slides through the supporting folding plate (93). The bottom ends of the two movable rods (94) are fixed with locking triangular blocks (95). The surface of the folding rod (91) is provided with an annular locking groove (96) that cooperates with the locking triangular block (95). The surface of the movable rod (94) is fixed with a spring washer (97). The surface of the movable rod (94) is fitted with a locking spring (98). The end of the pipe body (1) is fixed with a first fitting sealing ring (99). The inner wall of the connecting sleeve (2) is fixed with a second fitting sealing ring (910) that cooperates with the first fitting sealing ring (99).

4. The pipe connection structure for a thermal power boiler according to claim 3, characterized in that: The first fitting sealing ring (99) has a sealing protrusion (911) on its side, and the second fitting sealing ring (910) has a sealing concave groove (912) on its side that cooperates with the sealing protrusion (911).

5. The pipe connection structure for a thermal power boiler according to claim 4, characterized in that: The sealing convex ring (911) and the first fitting sealing ring (99) are integrally formed. The cross-sectional shape of the sealing convex ring (911) is a frustum shape. The sealing concave ring groove (912) is a gradient annular groove, and its inner dimension is smaller than its outer dimension.

6. The pipe connection structure for a thermal power boiler according to claim 3, characterized in that: The locking triangle (95) is a right triangle with a beveled design on the outside.

7. The pipe connection structure for a thermal power boiler according to claim 1, characterized in that: The openings of the two pipe bodies (1) that are close to each other are smaller than the size of the pipe body (1) itself, which makes it easier to limit the pipe body (1) when connected to the connecting sleeve (2).

8. The pipe connection structure for a thermal power boiler according to claim 3, characterized in that: One end of the locking spring (98) is fixed above the support plate (93), and the other end is fixed to the spring washer (97).

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