CN210768956U - Low-pressure inner cylinder of inner steam collection chamber - Google Patents
Low-pressure inner cylinder of inner steam collection chamber Download PDFInfo
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- CN210768956U CN210768956U CN201921302219.1U CN201921302219U CN210768956U CN 210768956 U CN210768956 U CN 210768956U CN 201921302219 U CN201921302219 U CN 201921302219U CN 210768956 U CN210768956 U CN 210768956U
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Abstract
The utility model provides an inner steam-collecting cavity low-pressure inner cylinder, which comprises an inner cylinder and an outer cylinder which is matched with the inner cylinder, and also comprises an inner gas-collecting cavity, wherein the inner gas-collecting cavity is arranged in the wall thickness of the inner cylinder wall, an inner pipe hole is radially arranged on the inner gas-collecting cavity, a steam-extracting pipe is fixedly arranged in the inner pipe hole, and the steam-extracting pipe is connected with the inner pipe hole and the outer pipe hole; the utility model discloses set up the gas collecting chamber in the wall thickness of inner cylinder for the outer diameter of inner cylinder and the inner diameter of outer cylinder can match the installation completely, but the installation of high accuracy can be accomplished to the machining precision of outer cylinder contact arc surface in the direct control, and, interior gas collecting chamber does not need higher accuracy in the inner cylinder wall, the ordinary processing method of current processing technique both can reach the effect, the interference problem that the conventional low pressure inner cylinder appears in outer gas collecting chamber can effectually be avoided to the form of the independent existence in interior gas collecting chamber.
Description
Technical Field
The utility model relates to a steam turbine technical field especially relates to an interior collection vapour cavity low pressure inner casing.
Background
Criss-cross supporting pipes and rib plates are arranged inside the low-pressure outer cylinder so as to ensure that the cylinder has good strength and vibration characteristics; the low-pressure inner cylinder of the steam turbine is assembled in the low-pressure outer cylinder, and the lower part of the conventional low-pressure inner cylinder is provided with a regenerative steam extraction pipeline and a steam collection chamber in front of the regenerative steam extraction pipeline; for the low-pressure outer cylinder with an unknown structure or a complex structure in the reconstruction engineering, a steam collecting cavity outside the low-pressure inner cylinder is easy to interfere with the outer cylinder, the structure of an outer gas collecting cavity is shown in figure 7, and a groove with the same size and shape is required to be arranged on the outer wall of the outer cylinder for matching, the matching precision can reduce the interference problem as far as possible only by reaching the surface precision of the outer wall of the inner cylinder and the inner wall of the outer cylinder, and in the actual operation process, the processing difficulty of the protrusion and the groove is high, and whether complete matching is realized is also an important factor for matching the inner cylinder and the outer cylinder of the steam turbine.
The utility model provides a novel low pressure inner casing of interior collection vapour cavity has avoided in the transformation engineering the outside collection vapour cavity of conventional low pressure inner casing easily to take place the problem of interfering with the outer cylinder.
SUMMERY OF THE UTILITY MODEL
The present invention aims to provide an internal steam collecting chamber low pressure internal cylinder which overcomes or at least partially solves the above problems, in order to solve the following technical problems:
1) the outer gas collecting cavity increases the matching difficulty of the inner cylinder and the outer cylinder, and increases the processing difficulty and cost;
2) and the low-pressure inner cylinder and the outer cylinder generate interference due to the arrangement of the outer gas collection cavity.
In order to achieve the above object, the technical solution of the present invention is specifically realized as follows:
the utility model provides an interior collection vapour cavity low pressure inner cylinder, including the inner cylinder and with the outer jar of inner cylinder cooperation installation still includes interior gas collecting cavity, in the wall thickness of cylinder wall including interior gas collecting cavity is established, interior gas collecting cavity radially is equipped with interior pipe orifice, and interior pipe orifice fixed mounting has the steam extraction pipe, and interior pipe orifice and outer pipe orifice are connected to the steam extraction pipe.
As a further proposal of the utility model, the radial cross section of the inner cylinder of the inner gas collection cavity is rectangular or circular, and the axial cross section area of the inner gas collection cavity in the inner cylinder is larger than the axial cross section area of the inner pipe hole in the inner cylinder.
As a further proposal of the utility model, the inner pipe hole is welded or screwed with the steam extraction pipe.
As a further aspect of the present invention, the inner pipe hole includes a first inner pipe hole and a second inner pipe hole, the first inner pipe hole communicates with the inner surface of the inner cylinder and the inner gas collecting chamber, and the second inner pipe hole communicates with the inner surface of the inner cylinder and the inner surface of the inner cylinder.
As a further aspect of the present invention, the center lines of the first inner pipe hole and the second inner pipe hole are overlapped or staggered.
As a further aspect of the present invention, the center line of the second inner pipe hole coincides with the center line of the outer pipe hole.
As a further aspect of the present invention, the outer tube hole is a through hole in the outer cylinder, and the inner diameter of the outer cylinder is the same as the outer diameter of the inner cylinder.
The utility model provides an interior collection vapour cavity low pressure inner cylinder, beneficial effect lies in: the utility model discloses set up the gas collecting chamber in the wall thickness of inner cylinder, make the outer diameter of inner cylinder and the inner diameter of outer cylinder can match the installation completely, need not set up the cavity that provides the required matching of outer gas collecting chamber on the outer wall of outer cylinder, the installation of high accuracy can be accomplished to the machining precision of the interior outer cylinder contact arc surface of direct control, the overall dimension that needs processing gas collecting chamber when having reduced outer gas collecting chamber and exist, still need consider in the outer cylinder with outer gas collecting chamber assorted size problem, reduce manufacturing procedure and reduce the process time cost, and, interior gas collecting chamber does not need higher accuracy in the inner cylinder wall, the ordinary processing method of current processing technique both can reach the effect, the interference problem that conventional low pressure inner cylinder appears in outer gas collecting chamber can effectually be avoided to the form of the independent existence in interior gas collecting chamber.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic front partial sectional structure view provided by an embodiment of the present invention.
Fig. 2 is a schematic side view of a partial cross-sectional structure according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional structural diagram of the direction a in fig. 1 according to an embodiment of the present invention.
Fig. 4 is a schematic view of a separation structure of the inner cylinder and the outer cylinder provided by the embodiment of the present invention.
Fig. 5 is a partial enlarged view of a position B in fig. 4, which is a schematic structural diagram according to an embodiment of the present invention.
Fig. 6 is a schematic view of a structure of a steam extraction pipeline according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an external gas collecting cavity in the prior art.
In the figure: 10. an inner cylinder; 11. an inner cylinder wall; 12. an inner tube bore; 121. a first inner tube bore; 122. a second inner tube bore; 20. an inner gas collection cavity; 30. a steam extraction pipe; 40. an outer cylinder; 41. the outer tube hole.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1 to 6, an inner steam collecting chamber low-pressure inner cylinder provided in an embodiment of the present invention includes an inner cylinder 10 and an outer cylinder 40 installed in cooperation with the inner cylinder 10, an outer wall of the inner cylinder 10 is installed in cooperation with an inner wall of the outer cylinder 40, and further includes an inner steam collecting chamber 20, the inner steam collecting chamber 20 is disposed in a wall thickness of an inner cylinder wall 11, an inner pipe hole 12 is radially disposed in the inner steam collecting chamber 20, the inner pipe hole 12 is radially divided into two sections by the inner steam collecting chamber 20, a steam extraction pipe 30 is fixedly installed in the inner pipe hole 12, an installation position of the steam extraction pipe 30 does not exceed a depth of the inner steam collecting chamber 20, the steam extraction pipe 30 is connected to the inner pipe hole 12 and an outer pipe hole 41, the steam extraction pipe 30 connects a second inner pipe hole 122 to the outer pipe hole 41, so that an outer diameter of the inner cylinder 10 and an inner diameter of the outer cylinder 40 can be completely matched, a chamber required to be matched with an outer wall of the outer steam collecting chamber is not required to be disposed on the outer cylinder, the overall dimension of the gas collection cavity which needs to be processed when the outer gas collection cavity exists is reduced, the size problem of the outer cylinder which is matched with the outer gas collection cavity needs to be considered, the processing procedures are reduced, and the processing time cost is reduced.
As shown in fig. 3-5, the radial cross section of the inner gas collecting chamber 20 in the inner cylinder 10 is rectangular or circular, the axial cross section area of the inner gas collecting chamber 20 in the inner cylinder 10 is larger than the axial cross section area of the inner tube hole 12 in the inner cylinder 10, the hot evaporation gas passes through the first inner tube hole 121 from the inside of the low-pressure inner cylinder 10 to reach the inner gas collecting chamber 20, the pressure changes, then the hot evaporation gas flows to the second inner tube hole 122, and finally flows out from the outer tube hole 41, the inner gas collecting chamber 20 does not need high precision in the inner cylinder wall 11, the common processing method of the existing processing technology can achieve the effect, and the form of the independent inner gas collecting chamber 20 can effectively avoid the interference problem in the outer gas collecting chamber of the conventional low-pressure inner cylinder 10.
As shown in fig. 6, the inner plenum 20 and the inner tube apertures 12 are a plurality of regular or irregular.
As shown in fig. 4 and 5, the inner pipe hole 12 is welded or screwed to the steam extraction pipe 30, and the connection position of the inner pipe hole 12 and the steam extraction pipe 30 is sealed by a sealing ring; the inner pipe hole 12 comprises a first inner pipe hole 121 and a second inner pipe hole 122, the first inner pipe hole 121 communicates the inner surface of the inner cylinder 10 with the inner gas collection cavity 20, and the second inner pipe hole 122 communicates the inner gas collection cavity 20 with the outer surface of the inner cylinder 10; the centerlines of the first inner pipe hole 121 and the second inner pipe hole 122 are coincident or staggered; the centerline of the second inner tube bore 122 coincides with the centerline of the outer tube bore 41.
As shown in fig. 4, the outer pipe hole 41 is a through hole formed in the outer casing 40, the inner diameter of the outer casing 40 is the same as the outer diameter of the inner casing 10, and the outer pipe hole 41 extends the steam extraction pipe 30 to the outside of the steam turbine.
The principle of the utility model is as follows: the inner gas collection cavity 20 introduces high-temperature and high-pressure steam generated in the inner cylinder 10 into the inner gas collection cavity 20 through the first inner pipe hole 121, the space change of the inner gas collection cavity 20 and the first inner pipe hole 121 enables the steam pressure and the temperature to be primarily released, the steam extraction pipe 31 communicates the holes of the inner cylinder 10 and the outer cylinder 40, evaporated gas is directly discharged to the outside of the outer cylinder 40 through the steam extraction pipe 31, the generation of steam at the joint position of the inner cylinder 10 and the outer cylinder 40 is avoided, the difficulty of processing is reduced by the inner gas collection cavity 20, the difficulty of matching of the inner cylinder and the outer cylinder is reduced, the forming of the inner cylinder and the outer cylinder is regular while the material cost is reduced, the production efficiency can be effectively improved, the production rhythm is accelerated, and the inner gas collection cavity has high application.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (7)
1. The low-pressure inner cylinder with the inner steam collecting cavity comprises an inner cylinder (10) and an outer cylinder (40) which is installed in a matched mode with the inner cylinder (10), and is characterized by further comprising an inner gas collecting cavity (20), wherein the inner gas collecting cavity (20) is arranged in the wall thickness of an inner cylinder wall (11), an inner pipe hole (12) is formed in the radial direction of the inner gas collecting cavity (20), a steam extraction pipe (30) is fixedly installed in the inner pipe hole (12), and the steam extraction pipe (30) is connected with the inner pipe hole (12) and an outer pipe hole (41).
2. The inner steam collecting chamber low-pressure inner cylinder as claimed in claim 1, characterized in that the inner steam collecting cavity (20) is rectangular or circular in radial cross section of the inner cylinder (10), and the cross-sectional area of the inner steam collecting cavity (20) in the axial direction of the inner cylinder (10) is larger than that of the inner pipe hole (12) in the axial direction of the inner cylinder (10).
3. The inner vapour-collecting chamber low-pressure inner cylinder according to claim 1, characterised in that the inner tube bore (12) is welded or screwed to the vapour extraction tube (30).
4. The inner cylinder with the low pressure and the steam collecting cavity as claimed in claim 1, wherein the inner pipe hole (12) comprises a first inner pipe hole (121) and a second inner pipe hole (122), the first inner pipe hole (121) is communicated with the inner surface of the inner cylinder (10) and the inner steam collecting cavity (20), and the second inner pipe hole (122) is communicated with the inner steam collecting cavity (20) and the outer surface of the inner cylinder (10).
5. The inner steam collecting chamber low pressure inner cylinder according to claim 4, characterized in that the centerlines of the first inner pipe hole (121) and the second inner pipe hole (122) coincide or are staggered.
6. The inner steam collecting chamber low pressure inner cylinder according to claim 5, characterized in that the centerline of the second inner pipe bore (122) coincides with the centerline of the outer pipe bore (41).
7. The inner steam collecting chamber low pressure inner cylinder according to claim 1, characterized in that the outer pipe hole (41) is a through hole in the outer cylinder (40), and the inner diameter of the outer cylinder (40) is the same as the outer diameter of the inner cylinder (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921302219.1U CN210768956U (en) | 2019-08-13 | 2019-08-13 | Low-pressure inner cylinder of inner steam collection chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921302219.1U CN210768956U (en) | 2019-08-13 | 2019-08-13 | Low-pressure inner cylinder of inner steam collection chamber |
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| Publication Number | Publication Date |
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| CN210768956U true CN210768956U (en) | 2020-06-16 |
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| CN201921302219.1U Active CN210768956U (en) | 2019-08-13 | 2019-08-13 | Low-pressure inner cylinder of inner steam collection chamber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332024A (en) * | 2019-08-13 | 2019-10-15 | 国电浙江北仑第一发电有限公司 | A kind of interior steam collecting cavity room low-pressure internal cylinder |
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2019
- 2019-08-13 CN CN201921302219.1U patent/CN210768956U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332024A (en) * | 2019-08-13 | 2019-10-15 | 国电浙江北仑第一发电有限公司 | A kind of interior steam collecting cavity room low-pressure internal cylinder |
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