Supercritical heat supply condensing steam turbine

Abstract

The utility model relates to the technical field of steam turbines, and particularly discloses a supercritical heat supply condensing steam turbine which comprises a steam turbine body, an air inlet is formed in one end of the upper portion of the steam turbine body, a heat supply port and a condensing port are formed in the two sides of the bottom of the end, away from the air inlet, of the steam turbine body respectively, and a heat supply flow valve flange is connected with the heat supply port and a heat supply pipe. The heat supply flow valve is connected with the condensing port through a flange, the condensing flow valve is connected with the condensing port and a condensing system pipe through a flange, a transmission gear is meshed between the heat supply flow valve and the condensing flow valve, and the bottom of the transmission gear is connected with a motor. By means of meshing transmission of the transmission gear and the valve rotating ring gear, the effect that heat supply and condensed steam flow distribution are rapidly and accurately adjusted according to load changes during peak shaving of a power grid is achieved, it is effectively guaranteed that the heat supply requirement is stably met, and the heat supply amount of a steam turbine under different working conditions is rapidly adjusted.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine technology, specifically a supercritical heating condensing steam turbine. Background Technology

[0002] Supercritical condensing steam turbines are advanced thermomechanical devices that play a crucial role in the power and heating sectors. Their working principle is based on the expansion and work done by steam inside the turbine. Steam enters the turbine through the inlet and flows sequentially through cylinders of different pressure levels, driving the blades on the turbine rotor to rotate and converting the steam's thermal energy into mechanical energy, which in turn drives a generator to produce electricity. Part of the steam that has completed its work enters the condensing system for recycling, while the other part is supplied to heat users through heating pipelines. However, during peak grid periods, the turbine needs to adjust its output power according to changes in grid load. When operating at low load, the amount of steam entering the turbine decreases, leading to a corresponding reduction in the amount of steam extracted for heating, which cannot meet the stable heating needs of heat users and adversely affects production and daily life. Therefore, we propose a supercritical condensing steam turbine for heating. Utility Model Content

[0003] The purpose of this invention is to provide a supercritical heating condensing steam turbine to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a supercritical heating condensing steam turbine, comprising a steam turbine body, an air inlet at one end of the upper part of the steam turbine body, a heating port and a condensing port on both sides of the bottom of the end of the steam turbine body away from the air inlet, and a combined regulating valve between the heating port and the condensing port;

[0005] The combined regulating valve includes a heating flow valve and a condensate flow valve. The heating flow valve is flanged and connected to the heating port and the heating pipe. The condensate flow valve is flanged and connected to the condensate port and the condensate system pipe. A transmission gear meshes between the heating flow valve and the condensate flow valve. A motor is connected to the bottom of the transmission gear.

[0006] The heating flow valve includes a valve body, a rotating ring rotatably connected to the outside of the valve body, a gear fixedly connected to the outside of the rotating ring, and several valve shafts rotatably connected to the middle of the valve body, with valve discs fixedly connected to the valve shafts.

[0007] The valve shaft passes through the outer wall of the valve body and is fixedly connected to a square block. A sector gear is fixedly connected to the top of the square block, and the sector gear is at a right angle.

[0008] The valve body has a fixed groove fixedly connected to the square block on its outer wall. A spring is fixedly connected inside the fixed groove. A limit sleeve is fixedly connected to the other end of the spring. The limit sleeve is slidably connected to the fixed groove.

[0009] The rotating ring has a rack fixedly connected to its inner side, which can mesh with a sector gear. A fixing block is fixedly connected to the back of the rack, and the fixing block has beveled edges at both ends above it.

[0010] One side of the limiting sleeve is square and engages with a square block, while the other side of the limiting sleeve is an annular square block that can rotate within it.

[0011] The condensate flow valve has the same structure as the heating flow valve, but its opening and closing states are opposite to those of the heating flow valve.

[0012] This utility model has at least the following beneficial effects:

[0013] In use, this utility model uses a motor to simultaneously drive the rotating rings of the heating flow valve and the condensing steam flow valve. By utilizing the meshing transmission gear and the valve rotating ring gear, it achieves the effect of quickly and accurately adjusting the distribution of heating and condensing steam flow according to load changes during grid peak shaving, effectively ensuring the stable satisfaction of heating demand and rapidly adjusting the heat supply of the steam turbine under different operating conditions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the combined regulating valve structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the heating flow valve structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of the rotating ring of the heating flow valve of this utility model;

[0018] Figure 5 This is an enlarged structural diagram of section A of the present invention;

[0019] In the diagram: 1. Steam turbine body; 2. Air inlet; 3. Heating inlet; 4. Condensate inlet; 5. Combined regulating valve; 6. Heating flow valve; 61. Valve body; 611. Fixing groove; 612. Spring; 613. Limiting sleeve; 62. Rotating ring; 621. Rack; 622. Fixing block; 623. Inclined edge; 63. Gear; 64. Valve shaft; 641. Square block; 642. Sector gear; 65. Valve disc; 7. Condensate flow valve; 8. Transmission gear; 9. Motor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] Please see Figures 1 to 5 This utility model provides a technical solution: a supercritical heating condensing steam turbine, including a turbine body 1, an air inlet 2 at one end of the turbine body 1, a heating inlet 3 and a condensing inlet 4 on both sides of the bottom of the end of the turbine body 1 away from the air inlet 2, a combined regulating valve 5 between the heating inlet 3 and the condensing inlet 4, the combined regulating valve 5 including a heating flow valve 6 and a condensing flow valve 7, the condensing flow valve 7 having the same structure as the heating flow valve 6, but the opening and closing state of the condensing flow valve 7 is opposite to that of the heating flow valve 6, the heating flow valve 6 is flanged to connect the heating inlet 3 and the heating pipe, the condensing flow valve 7 has the same structure as the heating flow valve 6, but the opening and closing state of the condensing flow valve 7 is opposite to that of the heating flow valve 6, the condensing flow valve 7 is flanged to connect the condensing inlet 4 and the condensing system pipe, a transmission gear 8 meshes between the heating flow valve 6 and the condensing flow valve 7, and a motor 9 is connected to the bottom of the transmission gear 8.

[0023] A square block 641 is fixedly connected to the valve shaft 64 through the outer wall of the valve body 61. A sector gear 642 is fixedly connected to the top of the square block 641. The sector gear 642 is at a right angle. A fixing groove 611 is fixedly connected to the outer wall of the valve body 61 at the square block 641. A spring 612 is fixedly connected inside the fixing groove 611. A limit sleeve 613 is fixedly connected to the other end of the spring 612. The limit sleeve 613 is slidably connected to the fixing groove 611. One side of the limit sleeve 613 is square and engages with the square block 641. The other side of the limit sleeve 613... A circular square block 641 can rotate within it. The heating flow valve 6 includes a valve body 61. A rotating ring 62 is rotatably connected to the outside of the valve body 61. A gear 63 is fixedly connected to the outside of the rotating ring 62. Several valve shafts 64 are rotatably connected to the middle of the valve body 61. Valve discs 65 are fixedly connected to the valve shafts 64. A rack 621 is fixedly connected to the inside of the rotating ring 62. The rack 621 can mesh with the sector gear 642. A fixing block 622 is fixedly connected to the back of the rack 621. The fixing block 622 has beveled edges 623 at both ends above it.

[0024] In use, when the heating flow needs to be adjusted, the motor 9 drives the transmission wheel and the gear 63 outside the rotating ring 62 to rotate, causing the rotating ring 62 to start rotating. At this time, the rotating ring 62, its rack 621, and the fixed block 622 rotate accordingly. When the rotating ring 62 rotates to a certain extent, the fixed block 622 moves with the rotating ring 62 to the square block 641. The inclined edges 623 at both ends of the upper part of the fixed block 622 will hit the limiting sleeve 613. Due to the presence of the inclined edges 623, as the rotating ring 62 continues to rotate... The fixing block 622 uses its inclined side 623 to push the limiting sleeve 613 into the fixing groove 611, compressing the spring 612. This causes the square part of the limiting sleeve 613 to gradually disengage from the square block 641, allowing the square block 641 to enter the annular part of the limiting sleeve 613. At this point, the square block 641 can rotate freely. Once the limiting sleeve 613 no longer restricts the rotation of the square block 641, the rotating ring 62 continues to rotate. At this time, the rack 621 on the inner side of the rotating ring 62 engages with the sector gear 642 on the top of the square block 641. Upon initial engagement, as the rack 621 continues to move, it drives the sector gear 642 to rotate. Because the sector gear 642 is at a right angle, its rotation will cause the valve shaft 64 to rotate by a corresponding angle, thereby causing the valve disc 65 to rotate and changing the opening and closing state of the valve disc 65. When the rotating ring 62 continues to rotate, after the fixed block 622 leaves the position of the square block 641, the spring 612 uses its own elastic force to push the limiting sleeve 613 back to its original position, so that the square part of the limiting sleeve 613 is engaged with the square block 641 again, preventing the square block 641 from engaging. Further rotation of the rotating ring 62 maintains the state of the valve disc 65. In this way, the state of the valve discs 65 on multiple valve shafts 64 can be adjusted sequentially by rotating the rotating ring 62, thereby achieving precise control of the heat supply flow. The adjustment of the opening and closing state of the valve discs 65 on each valve shaft 64 follows the above process. Based on the rotation angle of the rotating ring 62 and the meshing of the rack 621 with the sector gears 642 on different valve shafts 64, the steam flow area can be precisely adjusted, thereby controlling the amount of heat supply flow.

[0025] The working principle of this utility model is as follows: Since the structure of the condensing flow valve 7 is the same as that of the heating flow valve 6, but the opening and closing states are opposite, when its rotating ring 62 rotates, the valve disc 65 will move towards the closing direction, reducing the amount of steam entering the condensing system. Due to the opposite valve disc 65 adjustment mechanism of the two valves, during synchronous rotation, the steam can be effectively redistributed from the condensing side to the heating side. When operating at low load during peak shaving, the opening degree of the valve disc 65 of the heating flow valve 6 is increased by the motor 9, while the opening degree of the valve disc 65 of the condensing flow valve 7 is decreased, so that more steam flows to the heating pipe, thereby ensuring that the amount of heating steam does not decrease under the peak shaving condition of reduced turbine load, and meeting the heating demand.

[0026] Example 2

[0027] Please see Figure 5 In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that the inside of the fixing groove 611 is square. Under the extension and retraction of the spring 612, the limiting sleeve 613 can always move accurately along the square trajectory of the fixing groove 611, ensuring that it can accurately lock or release the square block 641 when needed, thereby stably controlling the movement state of the valve shaft 64 and the valve disc 65, and ensuring the normal operation and precise adjustment of the heating flow valve.

[0028] 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.

[0029] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A supercritical condensing steam turbine for heating, comprising a turbine body (1), characterized in that: The turbine body (1) is provided with an air inlet (2) at one end above the turbine body (1). The turbine body (1) is provided with a heating port (3) and a condensing port (4) on both sides of the bottom of the end away from the air inlet (2). A combined regulating valve (5) is provided between the heating port (3) and the condensing port (4). The combined regulating valve (5) includes a heating flow valve (6) and a condensate flow valve (7). The heating flow valve (6) is flanged to connect the heating port (3) and the heating pipe. The condensate flow valve (7) is flanged to connect the condensate port (4) and the condensate system pipe. A transmission gear (8) meshes between the heating flow valve (6) and the condensate flow valve (7). A motor (9) is connected to the bottom of the transmission gear (8).

2. A supercritical condensing steam turbine for heating according to claim 1, characterized in that: The heating flow valve (6) includes a valve body (61), a rotating ring (62) is rotatably connected to the outside of the valve body (61), a gear (63) is fixedly connected to the outside of the rotating ring (62), and a plurality of valve shafts (64) are rotatably connected to the middle of the valve body (61), and valve discs (65) are fixedly connected to the valve shafts (64).

3. A supercritical condensing steam turbine for heating according to claim 2, characterized in that: The valve shaft (64) passes through the outer wall of the valve body (61) and is fixedly connected to a square block (641). A sector gear (642) is fixedly connected to the top of the square block (641). The sector gear (642) is a right angle.

4. A supercritical condensing steam turbine for heating according to claim 2, characterized in that: The outer wall of the valve body (61) is fixedly connected to a fixing groove (611) at a square block (641). A spring (612) is fixedly connected inside the fixing groove (611). A limit sleeve (613) is fixedly connected to the other end of the spring (612). The limit sleeve (613) is slidably connected to the fixing groove (611).

5. A supercritical condensing steam turbine for heating according to claim 2, characterized in that: A rack (621) is fixedly connected to the inner side of the rotating ring (62). The rack (621) can mesh with the sector gear (642). A fixing block (622) is fixedly connected to the back of the rack (621). The fixing block (622) has inclined edges (623) at both ends above.

6. A supercritical condensing steam turbine for heating according to claim 4, characterized in that: The limiting sleeve (613) has a square shape on one side that engages with a square block (641), and the limiting sleeve (613) has a circular square block (641) on the other side that can rotate within it.

7. A supercritical condensing steam turbine for heating according to claim 1, characterized in that: The structure of the condensate flow valve (7) is the same as that of the heating flow valve (6), and the opening and closing states of the condensate flow valve (7) are opposite to those of the heating flow valve (6).

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