Exhaust gas regulating mechanism for a multi-boiler steam header in a stacked arrangement

Abstract

The application discloses a kind of exhaust regulating mechanism for multiple boiler steam main pipe of laminated arrangement in the technical field of boiler, including: the pipe fitting of steam main pipe outlet end is installed, installation groove is opened in the pipe fitting, the stopper is slidably installed in the installation groove inner cavity, the driving member for driving stopper movement is connected on the stopper, when steam main pipe exhaust, the driving member drives stopper to slide out from installation groove inner cavity, for reducing the cross-sectional area inside pipe fitting, steam main pipe and the pressure increase inside pipe fitting, when part of boiler is closed and stops working in device, stopper is moved to the inside pipe fitting, for reducing the cross-sectional area inside pipe fitting, pipe fitting and the pressure rise inside steam main pipe, to reduce the amplitude of steam temperature loss, ensure that the amount of steam into steam turbine will not substantially decrease, increase the utilization of steam, to save energy effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler, in particular to a kind of exhaust regulating mechanism for multiple boiler steam main pipe of layer arrangement. BACKGROUND

[0002] Boiler is important equipment in coal-fired power generation, steam generated by using boiler combustion drives steam turbine to work and then drives generator to work to start power generation.

[0003] Now multiple boiler layer arrangement combination is used to replace single large boiler, to solve the problem of large boiler power regulation difficulty and energy waste, the disclosure document with publication number CN106568072A discloses this way, when the system works, steam generated by each boiler works is all converged into steam main pipe, and then the converged steam is input into steam turbine from steam main pipe to drive steam turbine to work;

[0004] However, when part of the boilers stop working, the amount of steam that enters the steam main pipe at one time will decrease, because the inner diameter of the steam main pipe is fixed, the steam will escape when entering the steam main pipe, which will reduce the pressure of the steam in the steam main pipe, and the temperature loss of the steam will increase due to the decrease in pressure, which will cause the volume of the steam to decrease when entering the steam turbine (temperature reduction will reduce the expansion amplitude of the gas), which will reduce the efficiency of the steam driving the steam turbine and lead to a decrease in the utilization rate of the steam, thereby increasing energy consumption. Therefore, we propose a kind of exhaust regulating mechanism for multiple boiler steam main pipe of layer arrangement. SUMMARY

[0005] The present application aims to provide a kind of exhaust regulating mechanism for multiple boiler steam main pipe of layer arrangement, to solve the problem that the amount of steam that enters the steam main pipe at one time will decrease, which will reduce the pressure of the steam in the steam main pipe, and the temperature loss of the steam will increase due to the decrease in pressure, which will cause the volume of the steam to decrease when entering the steam turbine, which will reduce the efficiency of the steam driving the steam turbine and lead to a decrease in the utilization rate of the steam.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a kind of exhaust regulating mechanism for multiple boiler steam main pipe of layer arrangement, comprising: a pipe fitting installed on the steam main pipe gas outlet end;

[0007] A mounting groove is formed in the pipe fitting, a stopper is slidingly installed in the mounting groove inner cavity, the stopper is connected with a driving member for driving the stopper to move, when the steam main pipe exhausts, the driving member drives the stopper to slide out of the mounting groove inner cavity, so that the stopper moves to the center of the pipe fitting, to reduce the cross-sectional area of the pipe fitting interior, thereby reducing the size of the pipe fitting gas outlet, to increase the air pressure inside the steam main pipe and the pipe fitting.

[0008] As preferred, the driving member comprises a connecting member connected with the block, an installing member connected with the pipe member is sleeved on the outer wall of the connecting member, and a bolt for fixing the connecting member is screwed on the installing member to fix the block.

[0009] As preferred, an installing hole extending along the length direction of the connecting member is arranged on the end face of one end of the connecting member close to the block, and a moving rod connected with the block is slidingly inserted into the inner cavity of the installing hole.

[0010] The side wall of the block facing the center of the inner cavity of the pipe member is provided with a placing groove, a shielding block is slidingly inserted into the inner cavity of the placing groove, an elastic member for limiting the movement of the shielding block is connected to the shielding block, a heat conducting member extending into the inner cavity of the placing groove is installed on the side wall of the block, and a gas for pushing the shielding block to move is filled in the inner cavity of the placing groove.

[0011] As preferred, the block and the shielding block are both heat insulation members.

[0012] As preferred, two groups of baffle plates for plugging the pipe member are slidingly installed on the gas inlet end of the pipe member to make the steam gather in the steam main pipe and increase the pressure inside the pipe member and the steam main pipe.

[0013] As preferred, a slot is arranged on the side wall of one side of the baffle plate facing the steam main pipe, a pull block moving with the gas pressure in the steam main pipe is slidingly inserted into the inner cavity of the slot, and a gas for limiting the movement of the pull block is filled in the inner cavity of the slot.

[0014] The baffle plate and the pull block are both heat insulation members.

[0015] As preferred, a connecting block on the same plane as the pull block is hinged on one side of the baffle plate, a connecting groove is arranged on the side wall of the other side of the baffle plate facing the steam main pipe, one end of the connecting block is connected with the pull block, and the other end of the connecting block is inserted into the inner cavity of the connecting groove.

[0016] The baffle plate is connected with an elastic telescopic rod for opening the pipe member by moving the baffle plate.

[0017] As preferred, a connecting channel communicating with the inner cavity of the slot is arranged on the baffle plate on the side of the pull block, a connecting box covering the outlet of the connecting channel is installed on the baffle plate, a folding groove is arranged at the connecting part of the baffle plate and the connecting box, the connecting box is slidingly inserted into the inner cavity of the folding groove, and an elastic element for limiting the movement of the connecting box is connected to the connecting box.

[0018] As preferred, a connecting screw is screwed on the connecting box, and a screw hole opposite to the connecting screw is arranged on the baffle plate.

[0019] Compared with the prior art, the beneficial effect of the present application is that when part of the boiler stops working, the stop block is moved to the inside of the pipe, which reduces the cross-sectional area inside the pipe, reduces the gas outlet of the pipe, and increases the pressure inside the steam main pipe, thereby reducing the temperature loss of the steam during transportation, ensuring that the volume of steam entering the steam turbine does not decrease significantly, increasing the utilization efficiency of the steam, thereby achieving the effect of saving energy. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the present application;

[0021] Figure 2 is a schematic diagram of the pipe and the baffle connection structure of the present application;

[0022] Figure 3 is a schematic diagram of the stop block structure of the present application;

[0023] Figure 4 is an enlarged schematic diagram of the structure at A of the present application;

[0024] Figure 5 is an enlarged schematic diagram of the structure at B of the present application.

[0025] In the figure: 1, steam main pipe; 2, pipe; 3, mounting groove; 4, stop block; 5, baffle; 6, driving piece; 61, mounting piece; 62, connecting piece; 7, heat conducting piece; 8, moving rod; 9, placing groove; 10, shielding block; 11, connecting channel; 12, elastic expansion rod; 13, connecting box; 14, connecting screw; 15, slot; 16, pull block; 17, connecting block; 18, connecting groove; 19, retracting groove. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely 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, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] Embodiment 1:

[0028] Please refer to Figure 1 and Figure 2 A steam exhaust regulating mechanism for a multi-boiler steam main pipe in a laminated arrangement, comprising: a pipe 2 mounted on the gas outlet end of the steam main pipe 1;

[0029] The inner side wall of the pipe fitting 2 is provided with a plurality of groups of installation grooves 3, a stop block 4 is slidably installed in the inner cavity of the installation groove 3, the stop block 4 is connected with a driving member 6, the driving member 6 comprises an installation member 61, a connecting member 62 and a bolt, the installation member 61 is installed on the outer wall of the pipe fitting 2, one end of the connecting member 62 is connected with the stop block 4, the other end of the connecting member 62 penetrates through the installation member 61, the outer wall of the installation member 61 is screwed with the bolt, the fastening end of the bolt extends to the inside of the installation member 61 and is in close contact with the outer wall of the connecting member 62, so as to fix the connecting member 62 and the stop block 4;

[0030] Please refer to Figure 3 An installation hole is formed in the end face of the connecting member 62 close to the stop block 4, a moving rod 8 is slidably inserted in the inner cavity of the installation hole, one end of the moving rod 8 away from the connecting member 62 is connected with the stop block 4, a placing groove 9 is formed in the side wall of the stop block 4 facing the center of the inner cavity of the pipe fitting 2, a shielding block 10 is slidably inserted in the inner cavity of the placing groove 9, an elastic member is installed between the outer wall of the shielding block 10 and the inner wall of the placing groove 9, a heat conducting member 7 (a metal heat conducting member, which refers to copper, iron and other metals capable of conducting heat) is installed on the side wall of the stop block 4, the heat conducting member 7 is located in the inner cavity of the installation groove 3, one end of the heat conducting member 7 close to the stop block 4 extends to the inner cavity of the placing groove 9, the inner cavity of the placing groove 9 is filled with gas, the gas is located in the inner side of the shielding block 10, and the outer wall of the shielding block 10 and the inner wall of the placing groove 9 are sealed;

[0031] Further, the stop block 4 and the shielding block 10 are both heat insulation members, which means that the outer wall of the stop block 4 and the shielding block 10 is coated with heat insulation paint, so that the stop block 4 and the shielding block 10 do not conduct heat, achieving a heat insulation effect, and the inner wall of the pipe fitting 2 is also coated with heat insulation paint;

[0032] The adjustment mode of exhaust: when part of the boilers are closed, the bolt is loosened, the connecting member 62 is moved, the stop block 4 is moved to the inner cavity of the pipe fitting 2 (according to the number of closed boilers, a certain number of stop blocks 4 are adjusted, the more boilers are closed, the more stop blocks 4 are adjusted, and the greater the amplitude of the stop block 4 moving to the inside of the pipe fitting 2), then the bolt is tightened to fix the adjusted stop block 4, for reducing the size of the gas outlet of the pipe fitting 2;

[0033] The steam generated by the remaining boilers works enters the steam main pipe 1, and then enters the inner cavity of the pipe fitting 2, which is limited by the stop block 4, so that the size of the gas outlet of the pipe fitting 2 is reduced, the amount of steam passing through the inside of the pipe fitting 2 at one time is reduced, the air pressure inside the pipe fitting 2 and the steam main pipe 1 is increased, for reducing the temperature loss of steam in the conveying process (by reducing the size of the outlet of the pipe fitting 2, the size of the gas outlet of the pipe fitting 2 is smaller than the size of the gas inlet of the remaining boilers, so that the steam accumulates in the steam main pipe 1 and the pipe fitting 2 to increase the pressure);

[0034] The block 4 moves to the inside of the pipe 2, and the heat conducting piece 7 is moved to the inside of the pipe 2. When the steam enters the inside of the pipe 2, if the pressure of the steam in the pipe 2 is large, the block 4 will move to the inner cavity of the installation groove 3, and the heat conducting piece 7 will be moved to the inner cavity of the installation groove 3. If the pressure of the steam in the pipe 2 is small, the block 4 will not move, and the heat of the steam will be transmitted to the gas in the installation groove 9 through the heat conducting piece 7, so that the gas in the installation groove 9 is heated and expanded, the shielding block 10 moves to the inside of the pipe 2, the space occupied by the block 4 in the pipe 2 is increased, the size of the gas outlet of the pipe 2 is further reduced, the pressure in the steam main pipe 1 and the pipe 2 is increased, the temperature loss of the steam is reduced, and when the steam enters the steam turbine, the volume of the steam will not be greatly reduced due to the reduction of the temperature, the utilization efficiency of the steam is increased, and the energy consumption is reduced.

[0035] Embodiment 2:

[0036] As a preferred scheme, please refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , two groups of baffle plates 5 are slidably installed on the gas inlet end of the pipe 2, and the two groups of baffle plates 5 block the pipe 2. A slot 15 is formed in one side of the baffle plate 5 facing one side wall of the steam main pipe 1. A pull block 16 is slidably inserted into the inner cavity of the slot 15. The pull block 16 divides the inner cavity of the slot 15 into two mutually isolated spaces. The inner cavity of the slot 15 is filled with gas, and the gas is on the inner side of the pull block 16.

[0037] Further, the baffle plate 5 and the pull block 16 are heat insulation pieces, which means that heat insulation paint is applied to the outer wall of the baffle plate 5 and the pull block 16.

[0038] A connecting block 17 is hingedly connected to one side of the baffle plate 5. The connecting block 17 and the pull block 16 are on the same baffle plate 5. A connecting groove 18 is formed in the baffle plate 5 facing one side wall of the steam main pipe 1. One end of the connecting block 17 is connected to the pull block 16, and the other end of the connecting block 17 is inserted into the inner cavity of the connecting groove 18. An insertion block is installed in the area of the connecting block 17 in the connecting groove 18. An insertion slot is formed in the inner cavity of the connecting groove 18. The insertion block is inserted into the inner cavity of the insertion slot, so that the connecting block 17 is connected to the connecting groove 18, and the two groups of baffle plates 5 are connected.

[0039] Further, sealing pads are installed on the sides of the two groups of baffle plates 5 close to each other.

[0040] An elastic telescopic rod 12 is installed on the steam main pipe 1 (the elastic telescopic rod 12 can also be installed on the pipe 2). The elastic telescopic rod 12 includes a telescopic sub-rod, a telescopic main rod, and a spring. The telescopic sub-rod is slidably inserted into the inner cavity of the telescopic main rod. The spring is installed between the telescopic sub-rod and the inner cavity of the telescopic main rod. The moving end of the telescopic sub-rod is connected to the baffle plate 5.

[0041] The role of the baffle 5: the baffle 5 blocks the gas inlet end of the pipe 2, so that the steam generated by the boiler stays in the inner cavity of the steam main pipe 1.

[0042] The working mode of the baffle 5: when the steam gradually increases in the steam main pipe 1, the steam pressure in the steam main pipe 1 gradually increases, so that the pressure on the baffle 5 increases, the pull block 16 is pushed into the inner cavity of the slot 15, the connecting block 17 is driven to swing and move out of the inner cavity of the connecting slot 18, the connection between the two groups of baffles 5 is disconnected, the elastic extension rod 12 works to extend, the baffle 5 is pulled outward, the pipe 2 is opened, the steam gathered in the steam main pipe 1 flows into the pipe 2, so that the steam main pipe 1 has a certain pressure when the steam is discharged, which reduces the temperature loss of the steam.

[0043] Please refer to Figure 2 and Figure 4 , the baffle 5 is provided with a connecting channel 11, the connecting channel 11 is communicated with the inner cavity of the slot 15, the baffle 5 is provided with a connecting box 13 covering the outlet of the connecting channel 11, the connecting box 13 is on the same side of the baffle 5 as the pull block 16, the connecting part of the baffle 5 and the connecting box 13 is provided with a storage slot 19, the connecting box 13 is slidingly inserted into the inner cavity of the storage slot 19, and an elastic element is arranged between the connecting box 13 and the inner cavity of the storage slot 19. When the pull block 16 is extruded and moves, the gas in the slot is extruded into the inner cavity of the connecting box 13, the gas pressure in the connecting box 13 increases, the connecting box 13 moves outward from the storage slot 19, and the amplitude of the outward movement of the connecting box 13 can indicate the steam pressure in the steam main pipe 1.

[0044] Please refer to Figure 4 , the connecting box 13 is screwed with a connecting screw 14, the baffle 5 is provided with a screw hole opposite to the connecting screw 14, the connecting screw 14 is inserted into the inner cavity of the screw hole, the connecting box 13 can be fixed, the difficulty of the movement of the pull block 16 into the inner cavity of the slot 15 gradually increases (when the pull block 16 moves into the inner cavity of the slot 15, the connecting box 13 cannot move, the gas pressure in the connecting box 13 and the slot 15 increases, which increases the difficulty of the movement of the pull block 16), the difficulty of the opening of the baffle 5 is greater, and more steam can be gathered in the steam main pipe 1.

[0045] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the 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. An exhaust gas regulating mechanism for a multi-boiler steam header of a layered arrangement, characterized by: Include: The pipe fitting (2) is installed on the steam main pipe (1) outlet end; The installation groove (3) is arranged in the pipe fitting (2), the stop block (4) is slidably arranged in the inner cavity of the installation groove (3), the driving element (6) is connected to the stop block (4) for driving the stop block (4) to move, when the steam main pipe (1) exhausts, the driving element (6) drives the stop block (4) to slide out of the inner cavity of the installation groove (3), so that the stop block (4) moves to the center of the pipe fitting (2), for reducing the cross-sectional area of the pipe fitting (2), thereby reducing the size of the outlet of the pipe fitting (2), so that the steam main pipe (1) and the internal pressure of the pipe fitting (2) increase; Two groups of baffle plates (5) are slidably arranged on the inlet end of the pipe fitting (2) for plugging the pipe fitting (2); The side of the baffle plate (5) faces the side wall of the steam main pipe (1) and is provided with a slot (15), the inner cavity of the slot (15) is slidably inserted with a pull block (16) which moves with the internal pressure of the steam main pipe (1), the inner cavity of the slot (15) is filled with a gas for limiting the movement of the pull block (16); Wherein, the baffle plate (5) and the pull block (16) are heat insulation elements; The baffle plate (5) is hinged with a connecting block (17) on one side, the connecting block (17) is on the same side as the pull block (16), the other side of the baffle plate (5) is provided with a connecting groove (18) facing the side wall of the steam main pipe (1), one end of the connecting block (17) is connected with the pull block (16), the other end of the connecting block (17) is inserted in the inner cavity of the connecting groove (18); Wherein, the baffle plate (5) is connected with an elastic telescopic rod (12) for moving the baffle plate (5) to open the pipe fitting (2).

2. An exhaust regulating mechanism for a multiple boiler steam header of a stacked arrangement according to claim 1, characterized by: The connecting element (62) is connected with the stop block (4), the mounting element (61) is arranged on the outer wall of the connecting element (62), the mounting element (61) is screwed with a bolt for fixing the connecting element (62).

3. A vent regulating mechanism for a stacked arrangement of multi-boiler steam mains according to claim 1, characterized in that: The baffle plate (5) on one side of the pull block (16) is provided with a connecting channel (11) communicating with the inner cavity of the slot (15), the baffle plate (5) is provided with a connecting box (13) covering the outlet of the connecting channel (11), the connecting part of the baffle plate (5) and the connecting box (13) is provided with a storage slot (19), the connecting box (13) is slidably inserted in the inner cavity of the storage slot (19), the connecting box (13) is connected with an elastic element for limiting the movement of the connecting box (13).

4. A vent regulating mechanism for a multiple boiler steam header of a stacked arrangement according to claim 3, characterized in that: The connecting box (13) is screwed with a connecting screw (14), the baffle plate (5) is provided with a screw hole opposite to the connecting screw (14).

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