Automatic gas conveying pipeline of power plant and pressure control method of automatic gas conveying pipeline

Abstract

The invention discloses a power plant automatic gas pipeline and a pressure control method thereof, the power plant automatic gas pipeline comprises a main pipeline, one end of the main pipeline is provided with a conveying pipeline and a pressure relief pipe, and the inside of the main pipeline can be conveyed to the inside of the conveying pipeline or the pressure relief pipe; a pressure relief valve shell is arranged at the top of the main pipeline, a pressure relief pipe is arranged on the pressure relief valve shell, and the pressure relief valve shell and the pressure relief pipe are at least used for dividing pressure of high-pressure steam in the main pipeline and conveying the high-pressure steam into the conveying pipeline or the pressure relief pipe; a stop valve is arranged on the main pipeline and is at least used for changing the flow of steam in the main pipeline; a valve element is arranged in the pressure relief valve shell in a sliding mode and at least used for controlling opening and closing of the pressure relief pipe. According to the pressure relief valve shell, when the steam pressure in the main pipeline rises, steam can enter the pressure relief pipe through the valve element and is discharged from the connecting pipe and the branch pipe, and the good protection effect on the main pipeline is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of power plant automated gas transmission pipelines, and in particular to a power plant automated gas transmission pipeline and a pressure control method thereof. Background Art

[0002] A thermal power plant, also known as a thermal power plant, is a factory that uses combustibles as fuel to produce electricity. Its basic production process is: when the fuel burns, it heats water to generate steam, converting the chemical energy of the fuel into thermal energy. The steam pressure drives the turbine to rotate, converting the thermal energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy.

[0003] During the process of thermal power generation, thermal power plants need to transport the generated steam through gas pipelines so that the steam can enter the next link.

[0004] Although the current pipeline can transport steam, the steam generates pressure inside the pipeline. When the pressure is too high, it will damage the pipeline. The commonly used pressure reduction method is to use a pressure relief valve to release the pressure of the pipeline when the pressure is too high, and the discharged steam will be wasted. Therefore, it is urgent to design an automatic gas transmission pipeline and its pressure control method for power plants to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a power plant automated gas transmission pipeline and a pressure control method thereof to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An automated gas transmission pipeline for a power plant comprises a main pipeline, one end of which is provided with a delivery pipeline and a pressure relief pipe, and the gas inside the main pipeline can be transported to the inside of the delivery pipeline or the pressure relief pipe;

[0008] A pressure relief valve shell is arranged on the top of the main pipeline, and a pressure relief pipe is arranged on the pressure relief valve shell, and the pressure relief valve shell and the pressure relief pipe are at least used to decompress the high-pressure steam inside the main pipeline and transport it to the inside of the transport pipeline or the pressure relief pipe;

[0009] The main pipeline is provided with a barrier valve, and the barrier valve is at least used to change the flow rate of steam inside the main pipeline;

[0010] A valve core is slidably disposed inside the pressure relief valve housing, and the valve core is at least used to control the opening and closing of the pressure relief pipe;

[0011] The top end of the pressure relief valve housing is provided with an adjusting component, and the adjusting component is at least used for resetting the valve core inside the pressure relief valve housing;

[0012] A limiting module is arranged on one side of the top end of the pressure relief valve housing, and the limiting module is at least used for limiting the adjustment component, so as to control the moving distance of the valve core in the pressure relief valve housing.

[0013] Preferably, a flange is provided at the end of the main pipeline, and the flange is used for fixed connection between the main pipeline and the delivery pipeline.

[0014] Preferably, adjustable positioning components are provided on both side outer walls of the pressure relief valve housing, and the positioning components are at least used to block the valve core from moving downward inside the pressure relief valve housing;

[0015] The positioning assembly comprises a connector threadedly inserted into the interior of the pressure relief valve housing, and a rotating handle located outside the pressure relief valve housing is disposed at the distal end of the connector;

[0016] The connector is a bevel structure.

[0017] Preferably, a branch pipe is provided on an outer wall of one side of the delivery pipeline, a connecting pipe is installed at the end of the branch pipe, one end of the connecting pipe is connected to the pressure relief pipe, and the connecting pipe is located inside the delivery pipeline.

[0018] Preferably, the blocking valve includes a sleeve fixed to the top of the main pipeline, a rotating rod is rotatably inserted inside the sleeve, connecting seats are fixedly provided on the outer walls on both sides of the bottom of the rotating rod, a baffle is provided between the two connecting seats, the baffle is provided inside the main pipeline, a rotating disk is provided at the top of the rotating rod, and a locking piece is provided on one side of the rotating disk.

[0019] Preferably, the locking member comprises a fixing sleeve fixed to one side of the turntable, a screw is inserted into the internal thread of the fixing sleeve, a contact head is fixedly provided at the bottom end of the screw, and the contact head abuts against the upper surface of the sleeve, and a handle is installed at the top end of the screw.

[0020] Preferably, the adjusting assembly includes a guide rod installed on the top of the valve core, the outside of the guide rod is slidably sleeved with a threaded cover, and the threaded cover is threadedly inserted into the top of the pressure relief valve housing, and the inside of the threaded cover is provided with a return spring sleeved on the outside of the guide rod, the bottom end of the return spring abuts against the top of the valve core, and a gear plate is fixedly installed on the top of the threaded cover.

[0021] Preferably, the limiting module includes a guide seat fixed on the outer wall on one side of the top of the gear plate, a plug rod is slidably inserted inside the top of the guide seat, sliding grooves are provided on the guide seat and the plug rod, locking bolts are inserted inside the sliding grooves of the guide seat and the plug rod, and a limiting plate located at the top of the guide rod is fixedly provided on the outer wall at the top of the plug rod.

[0022] Preferably, the valve core is a cylindrical structure, and a cone head is fixedly provided at the bottom end of the valve core.

[0023] A pressure control method for an automated gas transmission pipeline in a power plant comprises the following steps:

[0024] S1. Steam is generated from the upstream process and enters the main pipeline. Then the steam enters the transmission pipeline from the main pipeline to transport the steam to the downstream process.

[0025] S2. When the steam in the upstream process increases suddenly, the air pressure inside the main pipeline continues to rise. At this time, the barrier valves can be fully opened to achieve pressure relief. If the barrier valves cannot relieve pressure after they are fully opened, the steam inside the main pipeline enters the inside of the pressure relief valve shell. The uniform pressure pushes the valve core upward inside the pressure relief valve shell. When the valve core passes over the opening of the pressure relief pipe, the steam inside the pressure relief valve shell enters the pressure relief pipe, and enters the connecting pipe and the branch pipe through the pressure relief pipe, allowing the excess high-pressure steam to be drained to the next process.

[0026] In the above technical scheme, the present invention provides a power plant automated gas transmission pipeline and a pressure control method thereof, which adopts a pressure relief valve shell, so that when the steam pressure inside the main pipeline increases, the steam can enter the pressure relief pipe through the valve core and be discharged from the connecting pipe and the branch pipe, thereby playing a good protective role on the main pipeline;

[0027] Through the setting adjustment component, the movement position of the valve core can be floated and adjusted to make it in a normally closed state. When the steam pressure inside the main pipeline increases, the valve core will automatically open. At the same time, the positioning component used can limit the lower position of the valve core, and the upper position of the valve core can be limited by the limit module, thereby controlling the size of the valve core opening and realizing the control of the steam flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0029] Figure 1 An angled structural stereogram is provided for an embodiment of an automated gas transmission pipeline in a power plant and a pressure control method thereof according to the present invention.

[0030] Figure 2 Another perspective structural stereogram of an embodiment of an automated gas transmission pipeline in a power plant and a pressure control method thereof provided by the present invention.

[0031] Figure 3 A structural cross-sectional view of an embodiment of an automated gas transmission pipeline in a power plant and a pressure control method thereof provided by the present invention.

[0032] Figure 4 A schematic diagram of the barrier valve structure provided in an embodiment of an automated gas transmission pipeline in a power plant and a pressure control method thereof according to the present invention.

[0033] Figure 5 A schematic diagram of the locking member structure provided in an embodiment of a power plant automation gas transmission pipeline and a pressure control method thereof according to the present invention.

[0034] Figure 6 A schematic diagram of the structure of an adjustment component and a limit module provided in an embodiment of an automated gas transmission pipeline in a power plant and a pressure control method thereof according to the present invention.

[0035] Figure 7 An exploded diagram of the structure of a regulating component provided in an embodiment of an automated gas transmission pipeline in a power plant and a pressure control method thereof according to the present invention.

[0036] Description of reference numerals:

[0037] 1. Main pipeline; 2. Delivery pipeline; 21. Branch pipe; 22. Connecting pipe; 3. Flange; 4. Pressure relief pipe; 5. Blocking valve; 51. Blocking plate; 52. Connecting seat; 53. Bushing; 54. Rotating rod; 55. Turntable; 56. Locking piece; 561. Screw; 562. Contact head; 563. Handle; 564. Fixing sleeve; 6. Positioning assembly; 61. Connecting head; 62. Turning handle; 7. Adjusting assembly; 71. Guide rod; 72. Reset spring; 73. Threaded cover; 74. Gear plate; 8. Limiting module; 81. Guide seat; 82. Insert rod; 83. Locking bolt; 84. Slide; 85. Limiting plate; 9. Valve core; 91. Cone head. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] like Figure 1-7As shown, an embodiment of the present invention provides an automated gas transmission pipeline for a power plant, comprising a main pipeline 1, one end of which is provided with a delivery pipeline 2 and a pressure relief pipe 4, and the gas inside the main pipeline 1 can be transported to the inside of the delivery pipeline 2 or the pressure relief pipe 4; a pressure relief valve shell is provided on the top of the main pipeline 1, and a pressure relief pipe 4 is provided on the pressure relief valve shell, and the pressure relief valve shell and the pressure relief pipe 4 are at least used to decompress the high-pressure steam inside the main pipeline 1 and transport it to the inside of the delivery pipeline 2 or the pressure relief pipe 4; a blocking valve 5 is provided on the main pipeline 1, and the blocking valve 5 is at least used to change the flow rate of the steam inside the main pipeline 1; a valve core 9 is slidably provided inside the pressure relief valve shell, and the valve core 9 is at least used to control the opening and closing of the pressure relief pipe 4; an adjusting component 7 is provided on the top of the pressure relief valve shell, and the adjusting component 7 is at least used to reset the valve core 9 inside the pressure relief valve shell; a limiting module 8 is provided on one side of the top of the pressure relief valve shell, and the limiting module 8 is at least used to limit the adjusting component 7, thereby controlling the moving distance of the valve core 9 in the pressure relief valve shell.

[0040] In this embodiment, a main pipeline 1 is included, and a delivery pipeline 2 and a pressure relief pipe 4 are provided at one end of the main pipeline 1. The cleanliness inside the main pipeline 1 can be transported to the inside of the delivery pipeline 2 or the pressure relief pipe 4;

[0041] Specifically, a branch pipe 21 is provided on the outer wall of one side of the delivery pipe 2, and a connecting pipe 22 is installed at the end of the branch pipe 21. One end of the connecting pipe 22 is connected to the pressure relief pipe 4, and the connecting pipe 22 is located inside the delivery pipe 2;

[0042] When the steam pressure inside the main pipeline 1 increases, the steam can push open the valve core 9 under the action of the pressure, so that it can enter the connecting pipe 22 and the branch pipe 21 through the pressure relief pipe 4;

[0043] When the steam pressure inside the main pipeline 1 is normal, the steam inside the main pipeline 1 enters the delivery pipeline 2 through the opening of the barrier valve 5, thereby realizing the delivery of steam from the upstream production process to the downstream production process.

[0044] In this embodiment, a pressure relief valve shell is provided at the top of the main pipeline 1, and a pressure relief pipe 4 is provided on the pressure relief valve shell. The pressure relief valve shell and the pressure relief pipe 4 are at least used to decompress the high-pressure steam inside the main pipeline 1 and transport it to the inside of the delivery pipeline 2 or the pressure relief pipe 4;

[0045] In this embodiment, a barrier valve 5 is provided on the main pipeline 1, and the barrier valve 5 is at least used to change the flow rate of steam inside the main pipeline 1;

[0046] Specifically, the blocking valve 5 includes a shaft sleeve 53 fixed on the top of the main pipeline 1, a rotating rod 54 is rotatably inserted inside the shaft sleeve 53, connecting seats 52 are fixedly arranged on the outer walls on both sides of the bottom of the rotating rod 54, a baffle 51 is arranged between the two connecting seats 52, the baffle 51 is arranged inside the main pipeline 1, a rotating disk 55 is arranged on the top of the rotating rod 54, and a locking member 56 is arranged on one side of the rotating disk 55. When the steam inside the main pipeline 1 flows into the inside of the delivery pipeline 2, the operator can release the locking member 56 and hold the rotating disk 55, so that the rotating rod 54 drives the baffle 51 to rotate inside the main pipeline 1, so as to realize the opening and closing of the main pipeline 1 and the adjustment of the opening size, and realize the control of the flow rate of the steam;

[0047] Specifically, the locking member 56 includes a fixed sleeve 564 fixed to one side of the turntable 55, the internal thread of the fixing sleeve 564 is inserted with a screw rod 561, the bottom end of the screw rod 561 is fixedly provided with a contact head 562, and the contact head 562 abuts against the upper surface of the shaft sleeve 53, and the top end of the screw rod 561 is installed with a handle 563. When the locking member 56 is released, the handle 563 is held by hand to make the screw rod 561 rotate inside the fixing sleeve 564, so that the screw rod 561 drives the contact head 562 to rise, so that the contact head 562 is separated from the upper surface of the shaft sleeve 53.

[0048] In this embodiment, a valve core 9 is slidably disposed inside the pressure relief valve housing, and the valve core 9 is at least used to control the opening and closing of the pressure relief pipe 4;

[0049] Specifically, the valve core 9 is a cylindrical structure, and a cone head 91 is fixedly provided at the bottom end of the valve core 9 , and the taper of the cone head 91 matches the inclined surface of the connecting head 61 .

[0050] In this embodiment, an adjusting component 7 is provided at the top of the pressure relief valve housing, and the adjusting component 7 is at least used for resetting the valve core 9 inside the pressure relief valve housing;

[0051] Specifically, the regulating assembly 7 includes a guide rod 71 installed on the top of the valve core 9, the outside of the guide rod 71 is slidably sleeved with a threaded cover 73, and the threaded cover 73 is threadedly inserted into the top of the pressure relief valve housing, and the inside of the threaded cover 73 is provided with a return spring 72 sleeved on the outside of the guide rod 71, the bottom end of the return spring 72 abuts against the top of the valve core 9, and a gear plate 74 is fixedly installed on the top of the threaded cover 73. The operator holds the gear plate 74 to drive the threaded cover 73 to rotate, and changes the insertion depth of the threaded cover 73 in the top of the pressure relief valve housing to change the installation position of the return spring 72, and adjusts the tightness of the valve core 9 when it moves, so as to match the steam pressure inside the main pipeline 1. When the threaded cover 73 is in the lower position, the corresponding steam pressure inside the main pipeline 1 is larger, and when the threaded cover 73 is in the upper position, the corresponding steam pressure inside the main pipeline 1 is smaller.

[0052] In this embodiment, a limit module 8 is provided on one side of the top end of the pressure relief valve housing, and the limit module 8 is at least used to limit the adjustment component 7, thereby controlling the moving distance of the valve core 9 in the pressure relief valve housing;

[0053] Specifically, the limit module 8 includes a guide seat 81 fixed on the outer wall of one side of the top of the gear plate 74, and a plug rod 82 is slidably inserted inside the top of the guide seat 81. A slide groove 84 is provided on the guide seat 81 and the plug rod 82. Locking bolts 83 are inserted inside the slide grooves 84 of the guide seat 81 and the plug rod 82. A limit plate 85 located at the top of the guide rod 71 is fixedly provided on the outer wall of the top of the plug rod 82. When the steam pressure inside the main pipeline 1 increases, the valve core 9 is pushed to move upward inside the pressure relief valve shell. The position of the second limit plate 85 can block the top of the guide rod 71, so that the moving position of the valve core 9 is limited and adjusted by the limit module 8, and the size of the opening of the pressure relief pipe 4 is controlled.

[0054] In this embodiment, a flange 3 is provided at the end of the main pipeline 1 , and the flange 3 is used for fixed connection between the main pipeline 1 and the delivery pipeline 2 .

[0055] In this embodiment, adjustable positioning components 6 are provided on both sides of the outer wall of the pressure relief valve housing, and the positioning components 6 are at least used to block the valve core 9 from moving downward inside the pressure relief valve housing;

[0056] Specifically, the positioning assembly 6 includes a connector 61 threadedly inserted into the pressure relief valve housing, and a handle 62 located outside the pressure relief valve housing is provided at the far end of the connector 61. The operator holds the handle 62 to adjust the position of the connector 61 inside the pressure relief valve housing, and the valve core 9 is limited from below the valve core 9, which can effectively improve the rapid response capability of the valve core 9 when the steam pressure inside the main pipeline 1 is too high;

[0057] Specifically, the connector 61 is a sloped structure.

[0058] A pressure control method for an automated gas transmission pipeline in a power plant comprises the following steps:

[0059] S1, steam is generated from the upstream process and enters the interior of the main pipeline 1, and then the steam enters the interior of the delivery pipeline 2 from the main pipeline 1 to transport the steam to the downstream process;

[0060] S2. When the steam in the upstream process increases suddenly, the air pressure inside the main pipeline 1 continues to increase. At this time, the barrier valve 5 can be fully opened to achieve pressure relief. If the pressure cannot be relieved after the barrier valve 5 is fully opened, the steam inside the main pipeline 1 enters the inside of the pressure relief valve shell. The uniform pressure pushes the valve core 9 to move upward inside the pressure relief valve shell. When the valve core 9 passes over the opening of the pressure relief pipe 4, the steam inside the pressure relief valve shell enters the pressure relief pipe 4, and enters the connecting pipe 22 and the branch pipe 21 through the pressure relief pipe 4, so that the excess high-pressure steam is drained to the next process.

[0061] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A power plant automation gas transmission pipeline, comprising a main pipeline (1), characterized in that: One end of the main pipeline (1) is provided with a delivery pipeline (2) and a pressure relief pipe (4), and the cleanliness inside the main pipeline (1) can be transported to the inside of the delivery pipeline (2) or the pressure relief pipe (4); A pressure relief valve shell is arranged at the top of the main pipeline (1), and a pressure relief pipe (4) is arranged on the pressure relief valve shell. The pressure relief valve shell and the pressure relief pipe (4) are at least used to decompress the high-pressure steam inside the main pipeline (1) and transport it to the inside of the transport pipeline (2) or the pressure relief pipe (4); The main pipeline (1) is provided with a barrier valve (5), and the barrier valve (5) is at least used to change the flow rate of steam inside the main pipeline (1); A valve core (9) is slidably disposed inside the pressure relief valve housing, and the valve core (9) is at least used to control the opening and closing of the pressure relief pipe (4); An adjusting component (7) is arranged at the top end of the pressure relief valve housing, and the adjusting component (7) is at least used for resetting the valve core (9) inside the pressure relief valve housing; A limiting module (8) is provided on one side of the top end of the pressure relief valve housing, and the limiting module (8) is at least used to limit the adjustment component (7), thereby controlling the moving distance of the valve core (9) in the pressure relief valve housing.

2. The power plant automation gas transmission pipeline according to claim 1, characterized in that: A flange (3) is provided at the end of the main pipeline (1), and the flange (3) is used for fixed connection between the main pipeline (1) and the delivery pipeline (2).

3. The power plant automation gas transmission pipeline according to claim 1, characterized in that: Adjustable positioning components (6) are provided on both side outer walls of the pressure relief valve housing, and the positioning components (6) are at least used to block the valve core (9) from moving downward inside the pressure relief valve housing; The positioning assembly (6) comprises a connector (61) threadedly inserted into the interior of the pressure relief valve housing, and a rotating handle (62) located outside the pressure relief valve housing is arranged at the distal end of the connector (61); The connecting head (61) is a sloped structure.

4. The power plant automation gas transmission pipeline according to claim 1, characterized in that: A branch pipe (21) is provided on one side outer wall of the delivery pipe (2), a connecting pipe (22) is installed at the end of the branch pipe (21), one end of the connecting pipe (22) is connected to the pressure relief pipe (4), and the connecting pipe (22) is located inside the delivery pipe (2).

5. The power plant automation gas transmission pipeline according to claim 1, characterized in that: The blocking valve (5) comprises a shaft sleeve (53) fixed on the top of the main pipeline (1), a rotating rod (54) is rotatably inserted inside the shaft sleeve (53), connecting seats (52) are fixedly arranged on the outer walls on both sides of the bottom of the rotating rod (54), a blocking plate (51) is arranged between the two connecting seats (52), and the blocking plate (51) is arranged inside the main pipeline (1), a rotating disk (55) is arranged at the top of the rotating rod (54), and a locking member (56) is arranged on one side of the rotating disk (55).

6. The power plant automation gas transmission pipeline according to claim 5, characterized in that: The locking member (56) comprises a fixing sleeve (564) fixed to one side of the rotating disk (55); a screw rod (561) is inserted into the internal thread of the fixing sleeve (564); a contact head (562) is fixedly provided at the bottom end of the screw rod (561), and the contact head (562) abuts against the upper surface of the shaft sleeve (53); and a handle (563) is installed at the top end of the screw rod (561).

7. The power plant automation gas transmission pipeline according to claim 1, characterized in that: The regulating assembly (7) comprises a guide rod (71) mounted on the top end of the valve core (9); a threaded cover (73) is slidably sleeved on the outside of the guide rod (71); the threaded cover (73) is threadedly inserted into the top end of the pressure relief valve housing; a return spring (72) sleeved on the outside of the guide rod (71) is arranged inside the threaded cover (73); the bottom end of the return spring (72) contacts the top end of the valve core (9); and a gear plate (74) is fixedly mounted on the top end of the threaded cover (73).

8. The power plant automation gas transmission pipeline according to claim 7, characterized in that: The limiting module (8) comprises a guide seat (81) fixed on the outer wall of one side of the top of the gear plate (74); a plug rod (82) is slidably inserted inside the top of the guide seat (81); a slide groove (84) is provided on both the guide seat (81) and the plug rod (82); a locking bolt (83) is inserted inside the slide groove (84) of the guide seat (81) and the plug rod (82); and a limiting plate (85) located at the top of the guide rod (71) is fixedly provided on the outer wall of the top of the plug rod (82).

9. The power plant automation gas transmission pipeline according to claim 1, characterized in that: The valve core (9) is a cylindrical structure, and a cone head (91) is fixedly provided at the bottom end of the valve core (9).

10. A pressure control method for an automated gas transmission pipeline in a power plant, comprising an automated gas transmission pipeline in a power plant as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, steam is generated from an upstream process and enters the interior of the main pipeline (1), and then the steam enters the interior of the delivery pipeline (2) from the main pipeline (1) to deliver the steam to the downstream process; S2. When the steam in the upstream process increases suddenly, the air pressure inside the main pipeline (1) continues to increase. At this time, the barrier valves (5) can be fully opened to achieve pressure relief. If the barrier valves (5) cannot be fully opened and pressure relief is still not possible, the steam inside the main pipeline (1) enters the interior of the pressure relief valve shell. The uniform pressure inside the pressure relief valve shell pushes the valve core (9) to move upward. When the valve core (9) passes over the opening of the pressure relief pipe (4), the steam inside the pressure relief valve shell enters the pressure relief pipe (4), and enters the connecting pipe (22) and the branch pipe (21) through the pressure relief pipe (4), allowing the excess high-pressure steam to be drained to the next process.

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