Steam turbine extraction steam heat supply adjusting device and method

Abstract

The application belongs to the technical field of steam turbines, and specifically discloses a steam turbine steam extraction heat supply adjusting device and method, which comprises a mounting bottom plate, a steam turbine fixedly connected to the top of the mounting bottom plate, a steam cylinder steam extraction vertical pipe fixedly connected to the top of the steam turbine, an adjusting valve outlet transition connecting pipe fixedly connected to the inside of both sides of the mounting bottom plate, a pneumatic adjusting valve arranged between the steam cylinder steam extraction vertical pipe and the adjusting valve outlet transition connecting pipe, and a mounting mechanism arranged outside the pneumatic adjusting valve and facilitating the mounting of the pneumatic adjusting valve between the steam cylinder steam extraction vertical pipe and the adjusting valve outlet transition connecting pipe. Through the linkage cooperation of the mounting mechanism and the sealing mechanism, the pneumatic adjusting valve in the steam extraction heat supply adjusting device can be mounted and sealed without bolts, the structure is simple and convenient to install, the device can be conveniently mounted and dismounted in a narrow environment, time and labor are saved, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of steam turbine technology, and specifically discloses a steam turbine extraction and heating regulation device and method. Background Technology

[0002] The steam turbine extraction heating regulating device mainly consists of a steam turbine, extraction riser, flange bolt-type regulating valve, collecting pipeline, and heating main pipe. The regulating valve is fixed between the extraction riser and the transition pipe by multiple sets of bolt flanges. The steam extraction volume is adjusted by the valve opening. The extracted steam is collected into the collecting branch pipe and then sent to the heating main pipe for external supply.

[0003] In existing steam turbine extraction heating regulating devices, flange bolt type regulating valves are generally connected by flanges and fastened with bolts. However, bolt installation and removal in confined spaces is time-consuming and laborious, resulting in reduced maintenance efficiency and increased workload for staff. In addition, the bolts are prone to loosening due to the vibration of the steam turbine during operation, which can lead to safety hazards. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a steam turbine extraction heating regulation device and method to solve the problem that the flange bolt type regulating valve of the existing steam turbine extraction heating regulation device is generally connected by flanges and fastened with bolts, which leads to reduced maintenance efficiency and increased workload of the staff.

[0005] To achieve the above objectives, the present invention provides a steam turbine extraction heating regulation device and method, comprising a mounting base plate, a steam turbine fixedly connected to the top of the mounting base plate, a steam turbine extraction riser fixedly connected to the top of the steam turbine, and regulating valve outlet transition pipes fixedly connected to the interior of both sides of the mounting base plate. A pneumatic regulating valve is provided between the steam turbine extraction riser and the regulating valve outlet transition pipe. An installation mechanism is provided outside the pneumatic regulating valve to facilitate the installation of the pneumatic regulating valve between the steam turbine extraction riser and the regulating valve outlet transition pipe. A sealing mechanism is provided inside the pneumatic regulating valve to improve the sealing performance of the pneumatic regulating valve installed between the steam turbine extraction riser and the regulating valve outlet transition pipe. A disassembly and sealing mechanism is provided inside the steam turbine extraction riser to temporarily block the steam turbine extraction riser after the pneumatic regulating valve is disassembled, preventing steam from spraying out and injuring personnel.

[0006] In the above technical solution, preferably, the installation mechanism includes two fixing rings, the middle parts of the two fixing rings are respectively fixedly connected to both ends of the pneumatic regulating valve, both ends of the pneumatic regulating valve are slidably connected to the outside of the sliding sleeves, the top of the sliding sleeves is fixedly connected to the engaging mounting sleeves, both ends of the pneumatic regulating valve are fixedly connected to the sealing rings, both ends of the pneumatic regulating valve are fitted with a retaining spring, the end of the engaging mounting sleeve away from the pneumatic regulating valve is provided with multiple engaging positioning grooves, both ends of the bottom of the cylinder extraction riser are fixedly connected to the plug discs, and multiple engaging positioning blocks are fixedly connected to the outside of the plug discs.

[0007] In the above technical solution, preferably, the sealing mechanism includes two sealing rings, which are slidably connected inside the locking sleeve. A slide cylinder is fixedly connected to one end of the sealing ring near the pneumatic regulating valve. A sealing ring is fixedly connected to the bottom outer end of the slide cylinder. Sliding grooves are provided inside both ends of the pneumatic regulating valve. A sealing spring is sleeved on the outside of the slide cylinder.

[0008] In the above technical solution, preferably, the disassembly and sealing mechanism includes two sliding frames, the two sliding frames are slidably connected to the inside of both ends of the cylinder extraction riser, a plug is fixedly connected to the inside of the sliding frame, a push rod is fixedly connected to the bottom of the plug, a fixing ring is fixedly connected to the inside of both ends of the cylinder extraction riser, a tension spring is provided inside the inside of both ends of the cylinder extraction riser, and a fixing frame is fixedly connected to the inside of the sliding cylinder.

[0009] In the above technical solution, preferably, an intermediate collecting branch pipe is fixedly connected to the top side of the mounting base plate. The intermediate collecting branch pipe is used to collect and send adjustable steam into the mounting base plate. A main heating header is fixedly connected to one side of the mounting base plate. A connecting pipe is fixedly connected between the bottoms of the two mounting mechanisms. One end of the intermediate collecting branch pipe is fixedly connected to one end of the main heating header. The other end of the intermediate collecting branch pipe is fixedly connected to a connecting pipe. The other end of the connecting pipe is fixedly connected to the outside of the connecting pipe. Two start-stop guide pipes are fixedly connected between the intermediate collecting branch pipe and the cylinder extraction steam riser.

[0010] In the above technical solution, preferably, one end of the clamping spring is fixedly connected to the end of the fixed ring away from the pneumatic regulating valve, and the other end of the clamping spring is fixedly connected to the end of the engaging mounting sleeve near the pneumatic regulating valve.

[0011] In the above technical solution, preferably, the sealing ring is slidably connected inside the sliding sleeve, and the plurality of engaging positioning grooves engage with the plurality of engaging positioning blocks respectively.

[0012] In the above technical solution, preferably, one end of the sealing spring is fixedly connected to the inside of the locking sleeve, the other end of the sealing spring is fixedly connected to the end of the sealing ring near the pneumatic regulating valve, the two slide cylinders are respectively slidably connected to the two ends of the pneumatic regulating valve, and the sealing ring is slidably connected to the inside of the sliding groove.

[0013] In the above technical solution, preferably, one end of the tension spring is fixedly connected to one end of the fixed ring, and the other end of the tension spring is fixedly connected to the end of the sliding frame near the fixed ring.

[0014] In the above technical solution, a preferred method for regulating steam extraction heating from a steam turbine includes the following steps: Step 1: Using an installation mechanism, a pneumatic regulating valve is installed between the cylinder extraction riser and the regulating valve outlet transition pipe. This diverts the steam from the cylinder extraction riser after the turbine has performed its work. A portion of the steam is sent to the intermediate collecting branch pipe via the regulating valve outlet transition pipe, and then merges into the main heating header to form a fixed basic heat source, ensuring the minimum steam demand of the heating network. The remaining steam continues to expand and perform work in the low-pressure cylinder of the turbine, thereby locking in the basic ratio of unit power generation to basic heating. The start / stop guide pipe simultaneously discharges condensate from the pipeline into the intermediate collecting branch pipe. Step 2: The excess high-temperature steam from the turbine is transported downwards along the extraction steam riser of the cylinder and flows through the pneumatic regulating valve. The valve core opening is changed by pneumatic regulation. When the valve is opened wide, the steam flows out through the transition pipe at the outlet of the regulating valve. When the valve is closed narrowly, the extraction steam volume decreases and the steam remains in the cylinder to continue generating electricity. The supply flow of incremental extraction steam is flexibly controlled by the valve opening. Step 3: Adjustable extraction steam drawn from the outlet of the regulating valve is sent to the intermediate collection branch pipe, where it mixes and stabilizes with the condensate from the start / stop guide pipe. The mixed steam is then fed into the main heating header, which is connected to the external pipeline at the end of the main heating header. Finally, all the steam is delivered to various heat-using equipment in the plant area, completing the entire heating regulation process.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention enables the installation of pneumatic regulating valves in steam extraction heating regulating devices without bolts through the coordinated operation of the installation mechanism and the sealing mechanism, while maintaining a seal. The structure is simple and easy to install, allowing for convenient loading and unloading in confined spaces, saving time and effort, improving maintenance efficiency, and preventing bolts from loosening due to turbine vibration, thus reducing safety hazards.

[0016] 2. This invention, through the linkage between the disassembly and sealing mechanism and the sealing mechanism, can automatically seal the cylinder extraction riser when the pneumatic regulating valve is disassembled, preventing steam leakage and thus avoiding scalding of workers by steam, protecting the workers. Attached Figure Description

[0017] Figure 1 The three-dimensional representation of the present invention Figure 1 ; Figure 2 The three-dimensional representation of the present invention Figure 2 ; Figure 3 This is a schematic diagram of the structure of the stopper disc of the present invention; Figure 4 This is a schematic diagram of the installation mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the sliding sleeve of the present invention; Figure 6 This is a schematic diagram of the internal structure of the slide tube of the present invention; Figure 7 This is a schematic diagram of the disassembly and sealing mechanism of the present invention; Figure 8 This is a schematic diagram of the plug head of the present invention.

[0018] In the diagram: 1. Mounting base plate; 2. Steam turbine; 3. Steam extraction riser of the cylinder; 4. Regulating valve outlet transition pipe; 5. Pneumatic regulating valve; 6. Mounting mechanism; 601. Fixing ring; 602. Sliding sleeve; 603. Engaging mounting sleeve; 604. Sealing ring; 605. Pressing spring; 606. Engaging positioning groove; 607. Plug disc; 608. Engaging positioning block; 7. Sealing mechanism; 701. Sealing pressing ring; 702. Sliding cylinder; 703. Sealing ring; 704. Sliding groove; 705. Sealing spring; 8. Disassembly and sealing mechanism; 801. Sliding frame; 802. Plug head; 803. Push rod; 804. Fixing ring; 805. Tension spring; 806. Fixing frame; 9. Intermediate collecting branch pipe; 10. Main heating header; 11. Start-stop guide pipe; 12. Connecting pipe; 13. Connecting pipe. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0021] like Figures 1-8The illustrated steam turbine extraction heating regulating device and method includes a mounting base plate 1. A steam turbine 2 is fixedly connected to the top of the mounting base plate 1, providing an installation position. A steam extraction riser 3 is fixedly connected to the top of the steam turbine 2, facilitating steam discharge. Regulating valve outlet transition pipes 4 are fixedly connected to the interior of both sides of the mounting base plate 1, serving as a connection. A pneumatic regulating valve 5 is installed between the steam extraction riser 3 and the regulating valve outlet transition pipes 4. An installation mechanism 6 is provided externally for the pneumatic regulating valve 5, facilitating its installation between the steam extraction riser 3 and the regulating valve outlet transition pipes 4. A sealing mechanism 7 is provided internally for the pneumatic regulating valve 5 to improve the sealing performance between the steam extraction riser 3 and the regulating valve outlet transition pipes 4. A disassembly and sealing mechanism 8 is provided internally for the steam extraction riser 3. The disassembly and sealing mechanism 8 is used to temporarily block the cylinder extraction steam riser 3 after the pneumatic regulating valve 5 is disassembled, to prevent steam from spraying out and injuring the staff. The top side of the mounting base plate 1 is fixedly connected to the intermediate collection branch pipe 9, which is used to collect and send adjustable steam into the mounting base plate 1. The side of the mounting base plate 1 is fixedly connected to the main heating header 10, and the other end of the main heating header 10 can be connected to the external pipeline, so that steam can be transmitted to the equipment that needs steam. The bottom of the two mounting mechanisms 6 is fixedly connected to the connecting pipe 13. One end of the intermediate collection branch pipe 9 is fixedly connected to one end of the main heating header 10, and the other end of the intermediate collection branch pipe 9 is fixedly connected to the connecting pipe 12. The connecting pipe 12 has the function of connection, and the other end of the connecting pipe 12 is fixedly connected to the outside of the connecting pipe 13. Two start-stop guide pipes 11 are fixedly connected between the intermediate collection branch pipe 9 and the cylinder extraction steam riser 3. The start-stop guide pipes 11 have the function of connection.

[0022] The mounting mechanism 6 includes two fixing rings 601, which provide the mounting position. The middle portions of the two fixing rings 601 are respectively fixedly connected to both ends of the pneumatic regulating valve 5. Sliding sleeves 602 are slidably connected to the outer sides of both ends of the pneumatic regulating valve 5. The sliding sleeves 602 can only slide on the ends of the pneumatic regulating valve 5, but cannot rotate at the ends. A snap-fit ​​mounting sleeve 603 is fixedly connected to the top of the sliding sleeve 602. Sealing rings 604 are fixedly connected to both ends of the pneumatic regulating valve 5. The sealing rings 604 slide inside the sliding sleeves 602, maintaining a seal without affecting the sliding of the sliding sleeves 602 at the ends of the pneumatic regulating valve 5. Both ends of the pneumatic regulating valve 5 are fitted with retaining springs 605. Multiple engaging and positioning grooves 606 are provided at the end of the engaging mounting sleeve 603 furthest from the pneumatic regulating valve 5. Plugs 607 are fixedly connected to both ends of the bottom of the cylinder extraction steam riser 3. The retaining springs 605 can use their own reaction force to tightly press the engaging mounting sleeve 603 against the plugs 607, thus enabling the installation of the pneumatic regulating valve 5. Therefore, the traditional flange connection is eliminated, and bolt installation is unnecessary, thereby improving the installation efficiency of the pneumatic regulating valve 5. This, in turn, improves the maintenance efficiency of the extraction steam heating regulating device and prevents bolt loosening caused by vibrations during turbine 2 operation. Plugs 607... The external fixed connection of 07 has multiple engaging positioning blocks 608. One end of the clamping spring 605 is fixedly connected to the end of the fixed ring 601 away from the pneumatic regulating valve 5, and the other end of the clamping spring 605 is fixedly connected to the end of the engaging mounting sleeve 603 near the pneumatic regulating valve 5. The sealing ring 604 is slidably connected inside the sliding sleeve 602. Multiple engaging positioning grooves 606 engage with multiple engaging positioning blocks 608 respectively. After the engaging positioning grooves 606 and engaging positioning blocks 608 are engaged, the pneumatic regulating valve 5 can be prevented from rotating. When installing the pneumatic regulating valve 5, the engaging mounting sleeve 603 is pressed towards the pneumatic regulating valve 5, thereby driving the sliding sleeve 602. The movement of the pneumatic regulating valve 5 towards the cylinder extraction riser 3 allows the clamping spring 605 to be compressed using the engaging mounting sleeve 603. At this point, the pneumatic regulating valve 5 can be placed between the cylinder extraction riser 3 and the regulating valve outlet transition pipe 4. When the engaging mounting sleeve 603 is released, the elastic force of the clamping spring 605 pushes the engaging mounting sleeve 603 away from the pneumatic regulating valve 5. This allows the engaging mounting sleeve 603 to move to the outside of the plug disc 607, and the engaging positioning groove 606 to engage with the engaging positioning block 608. This allows the pneumatic regulating valve 5 to be installed between the cylinder extraction riser 3 and the regulating valve outlet transition pipe 4.

[0023] The sealing mechanism 7 includes two sealing rings 701. A sealing gasket is installed at the end of each sealing ring 701 away from the pneumatic regulating valve 5, thereby improving the sealing performance when the sealing ring 701 abuts against the stopper disc 607 or the regulating valve outlet transition pipe 4. The two sealing rings 701 are slidably connected inside the engaging mounting sleeve 603. A slide cylinder 702 is fixedly connected to the end of each sealing ring 701 near the pneumatic regulating valve 5. The slide cylinder 702 serves as a guide for air. A sealing ring 703 is fixedly connected to the bottom outer end of the slide cylinder 702. Sliding grooves 704 are provided inside both ends of the pneumatic regulating valve 5, and the sealing ring 703 slides within the sliding grooves 704. The interior of 4 can improve the sealing performance, thereby preventing air leakage. A sealing spring 705 is sleeved on the outside of the slide cylinder 702. The sealing spring 705 can give an upward force to the sealing ring 701, so that the sealing ring 701 can be tightly attached to the end of the plug disc 607 or the transition pipe 4 of the regulating valve outlet. One end of the sealing spring 705 is fixedly connected to the inside of the snap-fit ​​mounting sleeve 603, and the other end of the sealing spring 705 is fixedly connected to the end of the sealing ring 701 near the pneumatic regulating valve 5. The two slide cylinders 702 are slidably connected to the two ends of the pneumatic regulating valve 5 respectively, and the sealing ring 703 is slidably connected to the inside of the sliding groove 704. When the pneumatic regulating valve 5 is installed between the cylinder extraction riser 3 and the regulating valve outlet transition pipe 4, the sealing ring 701 and the slide cylinder 702 can be squeezed towards the pneumatic regulating valve 5 under the blocking action of the plug disc 607, which in turn compresses the sealing spring 705. This allows the sealing ring 703 to slide inside the sliding groove 704. Under the action of the reaction force of the sealing spring 705, the sealing ring 701 can be tightly attached to the bottom of the plug disc 607 and the top of the regulating valve outlet transition pipe 4, thus improving the sealing performance. Under the action of the sealing ring 703, the sealing performance of the slide cylinder 702 and the end of the pneumatic regulating valve 5 can be maintained.

[0024] The disassembly and sealing mechanism 8 includes two sliding brackets 801. The sliding brackets 801 serve a limiting function and provide an installation position. The two sliding brackets 801 are slidably connected to the inside of both ends of the cylinder extraction riser 3. A plug 802 is fixedly connected to the inside of each sliding bracket 801. A push rod 803 is fixedly connected to the bottom of each plug 802. The push rod 803 can push the plug 802 away from the pneumatic regulating valve 5 after it is installed. A retaining ring 804 is fixedly connected to the inside of both ends of the cylinder extraction riser 3. After the plug 802 is blocked inside the retaining ring 804, it can... 5. To prevent steam from spraying out of the cylinder extraction riser 3 after disassembly and accidentally injuring personnel, tension springs 805 are installed inside both ends of the cylinder extraction riser 3. After the pneumatic regulating valve 5 is disassembled, the tension springs 805 can use their own tension to pull the sliding frame 801 downward. The sliding cylinder 702 is fixedly connected to the fixing frame 806. After the pneumatic regulating valve 5 is installed, the fixing frame 806 can use the push rod 803 to push the plug 802 upward. One end of the tension spring 805 is fixedly connected to one end of the fixing ring 804, and the other end of the tension spring 805 is fixedly connected to the end of the sliding frame 801 near the fixing ring 804. When the sealing ring 701 is subjected to a reaction force, it can exert a force on the fixing bracket 806 away from the pneumatic regulating valve 5, thereby enabling the fixing bracket 806 to exert an upward force on the push rod 803, which in turn can transmit the force to the plug 802. This allows the plug 802 to be pushed out of the fixing ring 804, thereby stretching the tension spring 805. At this time, the steam generated by the mounting base plate 1 in the cylinder extraction riser 3 can be conducted to the interior of the pneumatic regulating valve 5. When the pneumatic regulating valve 5 is removed, the push rod 803, lacking the thrust of the fixing bracket 806, can drive the sliding bracket 801 to move downward under the tension of the tension spring 805. This can drive the sliding bracket 801 and the plug 802 to move downward, thus blocking the plug 802 inside the fixing ring 804. This prevents the steam in the cylinder extraction riser 3 from escaping, thus preventing steam from escaping and injuring personnel after the pneumatic regulating valve 5 is removed.

[0025] A method for regulating steam extraction for heating from a steam turbine includes the following steps: Step 1: Using the installation mechanism 6, the pneumatic regulating valve 5 is installed between the cylinder extraction steam riser 3 and the regulating valve outlet transition pipe 4. After the turbine 2 performs work, the steam from the cylinder extraction steam riser 3 is diverted. A portion of the steam is sent to the intermediate collecting branch pipe 9 via the regulating valve outlet transition pipe 4, and then merges into the main heating header 10 to form a fixed basic heat source, ensuring the minimum steam demand of the heating network. The remaining steam continues to expand and perform work in the low-pressure cylinder of the turbine 2, thereby locking in the basic ratio of unit power generation and basic heating. The start / stop guide pipe 11 simultaneously discharges the condensate from the pipeline into the intermediate collecting branch pipe 9. Step 2: The excess high-temperature steam from turbine 2 is transported downwards along the cylinder extraction riser 3 and flows through the pneumatic regulating valve 5. The valve core opening is changed by pneumatic regulation. When the valve is opened wide, the steam flows out through the regulating valve outlet transition pipe 4. When the valve is closed narrowly, the extraction steam volume decreases and the steam remains in the cylinder to continue generating electricity. The supply flow of incremental extraction steam is flexibly controlled by the valve opening. Step 3: Adjustable extraction steam is drawn from the outlet of the regulating valve through the transition pipe 4 and sent to the intermediate collection branch pipe 9. It mixes and stabilizes the pressure with the condensate from the start-stop guide pipe 11 in the intermediate collection branch pipe 9. The mixed steam is then uniformly fed into the main heating header 10, and the end of the main heating header 10 is connected to the external pipeline. Finally, all the steam is delivered to various heat-using equipment in the plant area, completing the entire heating regulation.

[0026] Working principle: When installing the pneumatic regulating valve 5, press the engaging mounting sleeve 603 towards the pneumatic regulating valve 5, thereby driving the sliding sleeve 602 to move towards the pneumatic regulating valve 5. Then, the engaging mounting sleeve 603 can compress the clamping spring 605. At this time, the pneumatic regulating valve 5 can be placed between the cylinder extraction riser 3 and the regulating valve outlet transition pipe 4. Then, release the engaging mounting sleeve 603. Under the elastic action of the clamping spring 605, the engaging mounting sleeve 603 can be pushed away from the pneumatic regulating valve 5. Then, the engaging mounting sleeve 603 can move to the outside of the plug disc 607, and the engaging positioning groove 606 can engage with the engaging positioning block 608, thereby installing the pneumatic regulating valve 5 between the cylinder extraction riser 3 and the regulating valve outlet transition pipe 4. When the pneumatic regulating valve 5 is installed between the cylinder extraction riser 3 and the regulating valve outlet transition pipe 4, the sealing ring 701 and the slide cylinder 702 can be squeezed towards the pneumatic regulating valve 5 under the blocking action of the plug disc 607, which in turn can compress the sealing spring 705, thereby allowing the sealing ring 703 to slide inside the sliding groove 704. Under the action of the reaction force of the sealing spring 705, the sealing ring 701 can be tightly attached to the bottom of the plug disc 607 and the top of the regulating valve outlet transition pipe 4, thus improving the sealing performance. Under the action of the sealing ring 703, the sealing performance of the slide cylinder 702 and the end of the pneumatic regulating valve 5 can be maintained. When the sealing ring 701 is subjected to a reaction force, it can exert a force on the fixing bracket 806 away from the pneumatic regulating valve 5, thereby enabling the fixing bracket 806 to exert an upward force on the push rod 803, which in turn can transmit the force to the plug 802. This allows the plug 802 to be pushed out of the fixing ring 804, thereby stretching the tension spring 805. At this time, the steam generated by the mounting base plate 1 in the cylinder extraction riser 3 can be conducted to the interior of the pneumatic regulating valve 5. When the pneumatic regulating valve 5 is removed, the push rod 803, lacking the thrust of the fixing bracket 806, can drive the sliding bracket 801 to move downward under the tension of the tension spring 805. This can drive the sliding bracket 801 and the plug 802 to move downward, thus blocking the plug 802 inside the fixing ring 804. This prevents the steam in the cylinder extraction riser 3 from escaping, thus preventing steam from escaping and injuring personnel after the pneumatic regulating valve 5 is removed.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A steam turbine extraction heating regulating device, comprising a mounting base plate (1), characterized in that, A steam turbine (2) is fixedly connected to the top of the mounting base plate (1), and a cylinder extraction steam riser (3) is fixedly connected to the top of the steam turbine (2). A regulating valve outlet transition pipe (4) is fixedly connected to the inside of both sides of the mounting base plate (1). A pneumatic regulating valve (5) is provided between the cylinder extraction steam riser (3) and the regulating valve outlet transition pipe (4). An installation mechanism (6) is provided on the outside of the pneumatic regulating valve (5). The installation mechanism (6) facilitates the installation of the pneumatic regulating valve (5) on the cylinder extraction steam riser. Between (3) and the regulating valve outlet transition pipe (4), the pneumatic regulating valve (5) is provided with a sealing mechanism (7). The sealing mechanism (7) is used to improve the sealing performance of the pneumatic regulating valve (5) installed between the cylinder extraction steam riser (3) and the regulating valve outlet transition pipe (4). The cylinder extraction steam riser (3) is provided with a disassembly and sealing mechanism (8). The disassembly and sealing mechanism (8) is used to temporarily block the cylinder extraction steam riser (3) after the pneumatic regulating valve (5) is disassembled to prevent steam from spraying out and accidentally injuring the staff.

2. The steam turbine extraction heating regulating device according to claim 1, characterized in that, The installation mechanism (6) includes two fixing rings (601), the middle parts of the two fixing rings (601) are respectively fixedly connected to both ends of the pneumatic regulating valve (5), both ends of the pneumatic regulating valve (5) are slidably connected to the outside of the sliding sleeves (602), the top of the sliding sleeves (602) is fixedly connected to the snap-fit ​​mounting sleeve (603), both ends of the pneumatic regulating valve (5) are fixedly connected to the sealing rings (604), both ends of the pneumatic regulating valve (5) are fitted with a retaining spring (605), the snap-fit ​​mounting sleeve (603) is provided with multiple snap-fit ​​positioning grooves (606) at the end away from the pneumatic regulating valve (5), both ends of the bottom of the cylinder extraction riser (3) are fixedly connected to the plug discs (607), and multiple snap-fit ​​positioning blocks (608) are fixedly connected to the outside of the plug discs (607).

3. The steam turbine extraction heating regulating device according to claim 2, characterized in that, The sealing mechanism (7) includes two sealing rings (701), which are slidably connected inside the locking sleeve (603). A slide cylinder (702) is fixedly connected to one end of the sealing ring (701) near the pneumatic regulating valve (5). A sealing ring (703) is fixedly connected to the bottom outer end of the slide cylinder (702). Sliding grooves (704) are provided inside both ends of the pneumatic regulating valve (5). A sealing spring (705) is sleeved on the outside of the slide cylinder (702).

4. The steam turbine extraction heating regulating device according to claim 3, characterized in that, The disassembly and sealing mechanism (8) includes two sliding frames (801). The two sliding frames (801) are slidably connected to the inside of both ends of the cylinder extraction riser (3). A plug (802) is fixedly connected to the inside of the sliding frame (801). A push rod (803) is fixedly connected to the bottom of the plug (802). A fixing ring (804) is fixedly connected to the inside of both ends of the cylinder extraction riser (3). A tension spring (805) is provided inside both ends of the cylinder extraction riser (3). A fixing frame (806) is fixedly connected to the inside of the slide cylinder (702).

5. The steam turbine extraction heating regulating device according to claim 1, characterized in that, A middle collecting branch pipe (9) is fixedly connected to the top side of the mounting base plate (1). The middle collecting branch pipe (9) is used to collect and send adjustable steam into the mounting base plate (1). A main heating header pipe (10) is fixedly connected to one side of the mounting base plate (1). A connecting pipe (13) is fixedly connected between the bottoms of the two mounting mechanisms (6). One end of the middle collecting branch pipe (9) is fixedly connected to one end of the main heating header pipe (10). The other end of the middle collecting branch pipe (9) is fixedly connected to a connecting pipe (12). The other end of the connecting pipe (12) is fixedly connected to the outside of the connecting pipe (13). Two start-stop guide pipes (11) are fixedly connected between the middle collecting branch pipe (9) and the cylinder extraction steam riser pipe (3).

6. The steam turbine extraction heating regulating device according to claim 2, characterized in that, One end of the clamping spring (605) is fixedly connected to the end of the fixed ring (601) away from the pneumatic regulating valve (5), and the other end of the clamping spring (605) is fixedly connected to the end of the locking sleeve (603) near the pneumatic regulating valve (5).

7. The steam turbine extraction heating regulating device according to claim 2, characterized in that, The sealing ring (604) is slidably connected inside the sliding sleeve (602), and the plurality of engagement positioning grooves (606) are engaged with the plurality of engagement positioning blocks (608) respectively.

8. A steam turbine extraction heating regulating device according to claim 3, characterized in that, One end of the sealing spring (705) is fixedly connected to the inside of the snap-fit ​​mounting sleeve (603), and the other end of the sealing spring (705) is fixedly connected to the end of the sealing abutment ring (701) near the pneumatic regulating valve (5). The two slide cylinders (702) are respectively slidably connected to the two ends of the pneumatic regulating valve (5), and the sealing ring (703) is slidably connected to the inside of the sliding groove (704).

9. A steam turbine extraction heating regulating device according to claim 4, characterized in that, One end of the tension spring (805) is fixedly connected to one end of the fixed ring (804), and the other end of the tension spring (805) is fixedly connected to one end of the sliding frame (801) near the fixed ring (804).

10. A method for regulating steam extraction heating from a steam turbine, comprising a steam extraction heating regulating device according to claim 1, characterized in that, Includes the following steps: Step 1: Using the installation mechanism (6), the pneumatic regulating valve (5) is installed between the cylinder extraction steam riser (3) and the regulating valve outlet transition pipe (4). After the turbine (2) has done work, the cylinder extraction steam riser (3) is diverted. A portion of the steam is sent to the intermediate collection branch pipe (9) through the regulating valve outlet transition pipe (4), and then merged into the main heating header (10) to form a fixed basic heat source, ensuring the minimum steam demand of the heating network. The remaining steam continues to expand and do work in the low-pressure cylinder of the turbine (2), thereby locking the basic ratio of unit power generation and basic heating. The start-stop guide pipe (11) synchronously discharges the condensate from the pipeline into the intermediate collection branch pipe (9). Step 2: The excess high-temperature steam from the turbine (2) is transported downwards along the cylinder extraction riser (3) and flows through the pneumatic regulating valve (5). The valve core opening is changed by pneumatic regulation. When the valve is opened wide, the steam flows out through the regulating valve outlet transition pipe (4). When the valve is closed, the extraction steam volume decreases and the steam remains in the cylinder to continue generating electricity. The supply flow of incremental extraction steam is flexibly controlled by the valve opening. Step 3: Adjustable extraction steam drawn from the outlet transition pipe (4) of the regulating valve is sent into the intermediate collection branch pipe (9) and mixed with the condensate from the start-stop guide pipe (11) in the intermediate collection branch pipe (9) to stabilize the pressure; the mixed steam is uniformly fed into the main heating header (10), and the end of the main heating header (10) is connected to the external pipeline, and finally all the steam is delivered to various heat-using equipment in the plant area to complete the whole set of heating regulation.

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