A variable speed turbine governing valve distribution element

Abstract

The present application relates to the technical field of regulating valve, and discloses a variable speed steam turbine regulating valve steam distribution element, which comprises a steam chamber and two fixed rings arranged on the steam chamber, and further comprises: a regulating part installed on the steam chamber; a mounting part arranged on the regulating part; the regulating part comprises a steam outlet assembly installed on the steam chamber; a sliding assembly arranged on the steam chamber; the steam outlet assembly comprises a fixed plate one fixedly connected to the inner wall of the steam chamber; the inner wall of the steam chamber is fixedly connected with a fixed plate two, and a plurality of steam distribution elements are arranged on the fixed plate two. By arranging the regulating part, the present application solves the problems of the existing steam turbine regulating valve in use, such as small flow coefficient leading to limited flow capacity, large valve stroke increasing operation response time, single steam distribution mode difficult to adapt to complex working conditions, and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of regulating valve, in particular to a variable speed steam turbine regulating valve steam distribution element. BACKGROUND

[0002] For the isolated network operation of the steam turbine or large-scale drag steam turbine, the steam turbine is required to be able to run stably for a long time under variable load, and the minimum operation condition can reach 0.1 times of the rated condition, and sometimes even needs the steam turbine to run stably at 0.05 times of the rated condition. When the steam turbine runs at a low load condition, the steam flow through the regulating valve is much smaller than the rated steam flow, and the relative opening degree of the regulating valve is less than 10%. When the opening degree of the regulating valve changes slightly, the steam flow deviates greatly from the design condition, greatly increasing the control difficulty of the steam turbine speed, and even causing the steam turbine speed to oscillate.

[0003] However, the existing steam turbine regulating valve has the following shortcomings in the use process: although it can stably obtain good regulation linearity in the full stroke range, ensure the flow regulation accuracy, the flow coefficient is small, the through-flow capacity is limited, the valve stroke is large, the operation response time is increased, the steam distribution mode is single, and it is difficult to adapt to complex conditions. SUMMARY

[0004] The purpose of the present application is to provide a variable speed steam turbine regulating valve steam distribution element, which solves the problem that the existing steam turbine regulating valve has the following shortcomings in the use process: although it can stably obtain good regulation linearity in the full stroke range, ensure the flow regulation accuracy, the flow coefficient is small, the through-flow capacity is limited, the valve stroke is large, the operation response time is increased, the steam distribution mode is single, and it is difficult to adapt to complex conditions.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme:

[0006] The present application is a variable speed steam turbine regulating valve steam distribution element, which comprises a steam chamber and two fixed rings arranged on the steam chamber, and further comprises: an adjusting part installed on the steam chamber; an installation part arranged on the adjusting part; the adjusting part comprises a steam outlet assembly installed on the steam chamber; a sliding assembly arranged on the steam chamber; the steam outlet assembly comprises a fixed plate one fixedly connected to the inner wall of the steam chamber; the inner wall of the steam chamber is fixedly connected with a fixed plate two, a plurality of steam distribution elements are arranged on the fixed plate two, a steam outlet is arranged on each of the plurality of steam distribution elements, a sliding rail is arranged on each of the plurality of steam distribution elements, the fixed plate one and the fixed plate two are provided with steam exhaust holes corresponding to each other, the heights of the steam outlets on each steam distribution element are different, and the steam distribution elements are provided with four steam outlets.

[0007] Further, the mounting part comprises an adapting assembly installed on the adjusting part; a pushing assembly arranged on the adapting assembly, and the adapting assembly is installed on the steam outlet assembly.

[0008] Further, the sliding assembly comprises a threaded rod rotationally connected to the middle shaft of the first fixed plate, the front side of the threaded rod penetrates through the second fixed plate, the outer wall of the threaded rod is threadedly connected with a lifting plate, the lifting plate penetrates through a plurality of sliding rails, the outer wall of the lifting plate is fixedly connected with a plurality of sealing plates, the threaded rod is provided with a power element, the sealing plates are four in number and are distributed in a circumferential array, the four sealing plates are respectively slidingly connected in the corresponding steam distribution elements, the power element comprises a motor support fixedly connected to the front side of the second fixed plate, the inner wall of the motor support is fixedly connected with a motor, the output shaft of the motor is fixedly connected with the threaded rod through a shaft coupling, and the motor is fixedly connected with the second fixed plate through the motor support.

[0009] Further, the adapting assembly comprises a fixed sleeve box rotationally connected to the outer wall of the threaded rod, a plurality of limiting grooves are formed in the fixed sleeve box, the front side of each of the plurality of steam distribution elements is fixedly connected with a connecting block, the connecting blocks and the limiting grooves are four in number and are distributed in a circumferential array, and the four connecting blocks are adapted with the four limiting grooves.

[0010] Further, the pushing assembly comprises a pressing plate slidingly connected to the inner wall of the fixed sleeve box, the fixed sleeve box is provided with an elastic element, the pressing plate is in contact with the plurality of connecting blocks, the elastic element comprises a spring arranged in the fixed sleeve box, the front side of the spring is fixedly connected with the fixed sleeve box, the rear side of the spring is fixedly connected with the pressing plate, and the initial state of the spring is a compressed state.

[0011] The present application has the following beneficial effects:

[0012] 1.The steam exhaust capacity adjustment device is characterized in that: the steam exhaust capacity adjustment device comprises a steam chamber, a steam exhaust assembly, an adjusting part, a mounting part and a sealing plate; the steam chamber is provided with a steam outlet; the steam exhaust assembly is provided with a plurality of exhaust holes; the adjusting part is provided on the steam chamber; the mounting part is provided on the steam chamber; the sealing plate is connected with the steam exhaust assembly; the adjusting part is provided with a motor support, a motor, a threaded rod, a lifting plate and a sealing plate; the motor support is provided on the steam chamber; the motor is provided on the motor support; the threaded rod is provided on the motor; the lifting plate is provided on the threaded rod; the sealing plate is provided on the lifting plate; the motor is started to drive the threaded rod to rotate; the threaded rod is in transmission cooperation with the lifting plate; the rotation of the threaded rod is converted into the linear motion of the lifting plate; the lifting plate drives the sealing plate to slide along the sliding rail and the internal passage of the steam distribution element; the exhaust holes on the steam distribution element are gradually exposed; the exposed exhaust holes on the front side of the sealing plate can be used as the air inlet passage; the number of the exposed exhaust holes is continuously increased with the sliding of the sealing plate; the exhaust speed is also increased; the exhaust holes are designed as the size gradient of "small in front and large in back"; the exhaust capacity can be adjusted by changing the number of the exhaust holes; the exhaust capacity can be finely changed by the combination of the exhaust holes with different sizes; the adjusted steam fills in the steam chamber and is delivered to the steam inlet pipeline through the steam outlet; the steam distribution of the steam turbine in the whole working condition range is realized by using a single adjusting valve; the steam distribution mode is simple, stable and reliable.

[0013] 2.The mounting part is characterized in that: the mounting part comprises a steam distribution element, a fixed sleeve box, a fixed ring, a fixed plate one, a fixed plate two, a spring, a pressing plate, a connecting block and a limiting groove; the steam distribution element is selected according to the demand; the steam distribution element is inserted into the steam chamber from the steam outlet; the steam distribution element is sequentially aligned and passes through the exhaust holes on the fixed plate one and the fixed plate two; the position is accurate; the connecting block of the steam distribution element is aligned with the limiting groove of the fixed sleeve box and is inserted; the pressing plate slides in the sleeve box and presses the spring during the insertion; the fixed sleeve box is rotated to make the connecting block slide to the end along the limiting groove; the spring is reset after being loosened; the connecting block is clamped in the limiting groove; the steam distribution element is fixed; the steam chamber is mounted on the corresponding pipeline through the fixed ring; the overall assembly is completed; the steam turbine steam distribution is adaptively improved by the individual design of the steam distribution element without changing the overall structure.

[0014] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a partial sectional structure schematic diagram of the present application;

[0016] Figure 2 It is a whole structure schematic diagram of the present application;

[0017] Figure 3 It is a partial sectional structure schematic diagram of the steam outlet assembly of the present application;

[0018] Figure 4 It is a partial sectional structure schematic diagram of the adaptation assembly of the present application;

[0019] Figure 5 It is a partial structure schematic diagram of the lifting plate of the present application;

[0020] Figure 6 A partial structure diagram of the gas outlet of the present application;

[0021] Figure 7 An enlarged structure diagram of A in the present application Figure 3

[0022] Figure 8 An enlarged structure diagram of B in the present application Figure 3

[0023] In the drawings, the components represented by each reference numeral are listed as follows:

[0024] In the drawings: 111, cabin; 112, fixed ring; 2, adjusting part; 21, steam outlet assembly; 211, fixed plate one; 212, fixed plate two; 213, steam distribution element; 214, gas outlet; 215, sliding rail; 22, sliding assembly; 221, threaded rod; 222, lifting plate; 223, sealing plate; 224, motor support; 225, motor; 3, mounting part; 31, matching assembly; 311, fixed sleeve box; 312, limiting groove; 313, connecting block; 32, pushing assembly; 321, pressing plate; 322, spring. DETAILED DESCRIPTION

[0025] Please refer to Figure 1 - Figure 8 As shown in the drawings, the present application is a steam turbine regulating valve steam distribution element, which comprises a cabin 111 and two fixed rings 112 arranged on the cabin 111, further comprising: an adjusting part 2 installed on the cabin 111; a mounting part 3 arranged on the adjusting part 2;

[0026] ​​The adjusting part 2 comprises a steam outlet assembly 21 installed on the steam chamber 111, and a sliding assembly 22 arranged on the steam chamber 111; the steam outlet assembly 21 comprises a fixed plate one 211 fixedly connected to the inner wall of the steam chamber 111, the inner wall of the steam chamber 111 is fixedly connected with a fixed plate two 212, a plurality of steam distribution elements 213 are arranged on the fixed plate two 212, a plurality of steam outlet elements are arranged on the steam distribution elements 213, a plurality of sliding rails 215 are arranged on the steam distribution elements 213, the fixed plate one 211 and the fixed plate two 212 are provided with steam outlet holes corresponding to each other, the heights of the steam outlets 214 on each steam distribution element 213 are different, the steam distribution elements 213 are four in number, the steam outlet elements comprise the steam outlets 214 arranged on the steam distribution elements 213, the steam outlets 214 are different in size and are distributed from small to large, the sliding assembly 22 comprises a threaded rod 221 rotationally connected to the central shaft of the fixed plate one 211, the front side of the threaded rod 221 penetrates through the fixed plate two 212, a lifting plate 222 is threadedly connected to the outer wall of the threaded rod 221, the lifting plate 222 penetrates through the plurality of sliding rails 215, a plurality of sealing plates 223 are fixedly connected to the outer wall of the lifting plate 222, a power element is arranged on the threaded rod 221, the sealing plates 223 are four in number and are arranged in a circumferential array, the four sealing plates 223 are slidingly connected in the corresponding steam distribution elements 213 respectively, the power element comprises a motor bracket 224 fixedly connected to the front side of the fixed plate two 212, a motor 225 is fixedly connected to the inner wall of the motor bracket 224, the output shaft of the motor 225 is fixedly connected with the threaded rod 221 through a shaft coupling, the motor 225 is fixedly connected with the fixed plate two 212 through the motor bracket 224, by arranging the adjusting part 2, the steam distribution of the steam turbine in the full working condition range can be realized by using a single adjusting valve, and the steam distribution mode is simpler, more stable and reliable.

[0027] The mounting part 3 comprises an adapting assembly 31 mounted on the adjusting part 2, and a pushing assembly 32 arranged on the adapting assembly 31, wherein the adapting assembly 31 is mounted on the steam outlet assembly 21, and the adapting assembly 31 comprises a fixed sleeve box 311 rotationally connected to the outer wall of the threaded rod 221, a plurality of limiting grooves 312 are formed in the fixed sleeve box 311, a plurality of connecting blocks 313 are fixedly connected to the front sides of the plurality of steam distribution elements 213, the connecting blocks 313 and the limiting grooves 312 are respectively provided with four, and are arranged in a circumferential array, the four connecting blocks 313 are respectively matched with the four limiting grooves 312, and the pushing assembly 32 comprises a pressing plate 321 slidingly connected to the inner wall of the fixed sleeve box 311, wherein an elastic member is arranged in the fixed sleeve box 311, the pressing plate 321 is in contact with the plurality of connecting blocks 313, the elastic member comprises a spring 322 arranged in the fixed sleeve box 311, the front side of the spring 322 is fixedly connected to the fixed sleeve box 311, the rear side of the spring 322 is fixedly connected to the pressing plate 321, and the initial state of the spring 322 is a compressed state, through the mounting part 3 and the individualized design of the steam distribution element 213, the adaptability of steam distribution can be improved by simply replacing the steam distribution element 213 without changing the overall structure.

[0028] It should be noted that the control of the motor 225 in the application can be realized by setting a program in the control panel and inputting related parameters according to requirements to realize automatic control. The setting of this control mode can be realized by existing technologies, such as PLC.

[0029] In use, first according to the required size of the corresponding steam element 213 installed in the steam cabin 111, installed in the corresponding steam element 213 from the gas end inserted into the steam cabin 111, inserted in alignment with the fixed plate one 211 exhaust hole, followed by the fixed plate two 212 exhaust hole, followed by the connecting block 313 alignment fixed sleeve box 311 limit slot 312, first connecting block 313 inserted into the limit slot 312, in the insertion of the pressure plate 321 will slide in the fixed sleeve box 311, the spring 322 will be extruded at this time, then rotate the fixed sleeve box 311, the connecting block 313 will slide in the limit slot 312, after sliding to the end of the limit slot 312 loose steam element 213, the spring 322 will be pushed back to the connecting block 313 at this time, with the movement of the connecting block 313 will be stuck in the limit slot 312, thus can achieve the effect of installing the steam element 213, then the steam cabin 111 through the fixed ring 112 installed on the corresponding pipeline, after installation is completed, you can run, in the operation if you want to adjust the start motor bracket 224 on the motor 225, the motor 225 will be with the screw rod 221 with the rotation, in the screw rod 221 rotation will take the plate 222 and the sealing plate 223 in the slide rail 215 and steam element 213 sliding, with the sealing plate 223 in the steam element 213 sliding, the gas outlet 214 will continue to leak, the gas outlet 214 located in front of the sealing plate 223 at this time can be used as the gas inlet, the more gas outlet 214 located in front of the sealing plate 223, the faster the exhaust speed, because the size of the gas outlet 214 is not the same, the gas outlet 214 is smaller, the more back gas outlet 214 will gradually increase, with the sealing plate 223 in the steam element 213 sliding can achieve the effect of adjusting the exhaust volume, the exhaust steam will fill in the steam cabin 111, and through the gas end into the exhaust pipeline, thus can achieve the effect of adjusting the exhaust volume.

Claims

1. A variable speed steam turbine governing valve distribution element comprising a pocket (111) and two stationary rings (112) disposed on the pocket (111), characterized in that, Also include: Adjustment part (2), the adjustment part (2) is installed on the cabin (111); The installation part (3) is arranged on the adjustment part (2); The adjustment part (2) includes steam outlet assembly (21), which is installed on the cabin (111); And Sliding assembly (22), the sliding assembly (22) is arranged on the cabin (111); The steam outlet assembly (21) includes a fixed plate one (211) fixedly connected to the inner wall of the cabin (111), the inner wall of the cabin (111) is fixedly connected with a fixed plate two (212), a plurality of steam distribution elements (213) are arranged on the fixed plate two (212), a plurality of steam distribution elements (213) are arranged on the fixed plate two (212), a plurality of steam distribution elements (213) are arranged on the fixed plate two (212), a plurality of sliding rails (215) are arranged on the fixed plate two (213). Wherein, the fixed plate one (211) and the fixed plate two (212) are provided with exhaust holes, and correspond to each other, the height of the air outlet (214) on each steam distribution element (213) is inconsistent, and the steam distribution element (213) is provided with four; The sliding assembly (22) includes a threaded rod (221) rotatably connected to the central shaft of the fixed plate one (211), the front side of the threaded rod (221) penetrates the fixed plate two (212), the outer wall of the threaded rod (221) is threadedly connected with a lifting plate (222), the lifting plate (222) penetrates a plurality of sliding rails (215), the outer wall of the lifting plate (222) is fixedly connected with a plurality of sealing plates (223), and the threaded rod (221) is provided with a power element; Wherein, the sealing plate (223) is provided with four and is distributed in a circumferential array, and the four sealing plates (223) are respectively slidably connected in the corresponding steam distribution element (213).

2. A variable speed steam turbine governing valve distribution element according to claim 1, wherein The installation part (3) includes an adapter assembly (31), which is installed on the adjustment part (2); And The pushing assembly (32) is arranged on the adapter assembly (31); Wherein, the adapter assembly (31) is installed on the steam outlet assembly (21).

3. A variable speed steam turbine governing valve distribution element according to claim 2, wherein, The adapter assembly (31) includes a fixed sleeve box (311) rotatably connected to the outer wall of the threaded rod (221), a plurality of limiting grooves (312) are formed in the fixed sleeve box (311), and the front side of the plurality of steam distribution elements (213) is fixedly connected with a connecting block (313); Wherein, the connecting block (313) and the limiting groove (312) are respectively provided with four and are distributed in a circumferential array, and the four connecting blocks (313) are respectively matched with the four limiting grooves (312).

4. A variable speed steam turbine governing valve distribution element according to claim 3, wherein, The pushing assembly (32) includes a pressing plate (321) slidably connected to the inner wall of the fixed sleeve box (311), and the fixed sleeve box (311) is provided with an elastic element; Wherein, the pressing plate (321) is in contact with the plurality of connecting blocks (313).

5. A variable speed steam turbine governing valve distribution element according to claim 4, wherein, The steam outlet includes an air outlet (214) formed in the steam distribution element (213); Wherein, the size of the air outlet (214) is different, and is distributed from small to large.

6. A variable speed steam turbine governing valve distribution element according to claim 5, wherein, The power component comprises a motor support (224) fixedly connected to the front side of the second fixing plate (212), an inner wall of the motor support (224) is fixedly connected with a motor (225), and an output shaft of the motor (225) is fixedly connected with the threaded rod (221) through a shaft coupling. The motor (225) is fixedly connected with the second fixing plate (212) through the motor support (224).

7. A variable speed steam turbine governing valve distribution element according to claim 6, wherein, The elastic component comprises a spring (322) arranged in the fixing sleeve box (311), the front side of the spring (322) is fixedly connected with the fixing sleeve box (311), and the rear side of the spring (322) is fixedly connected with the pressing plate (321). The initial state of the spring (322) is a compressed state.

Images