CN211474196U

CN211474196U - Device for positioning between inner cylinder and outer cylinder of steam turbine and draining inner cylinder

Info

Publication number: CN211474196U
Application number: CN202020030218.2U
Authority: CN
Inventors: 吴浩; 王志忠; 冯明飞; 郑晓宗
Original assignee: Jintongling Technology Group Co ltd
Current assignee: Jintongling Technology Group Co ltd
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-09-11
Anticipated expiration: 2030-01-08

Abstract

The utility model discloses a device for positioning between inner and outer cylinders of a steam turbine and draining the water of the inner cylinder, which comprises a draining connecting pipe, a sealing ring, a baffle ring, a center pin and a gasket; the drain connecting pipe comprises a hollow pipe body and a flange base plate with a drain hole; a pin hole for inserting the center pin is arranged in the outer cylinder; the center pin is inserted into the pin hole of the outer cylinder; the top of the inner cylinder extends into the positioning groove of the inner cylinder; the inner cylinder is provided with a drain hole above the positioning groove; the hollow pipe body of the drainage connecting pipe penetrates through the central pin and extends into the drainage port; a sealing ring gasket is arranged at the top of the drain port; a sealing ring is arranged between the outer wall of the hollow pipe body of the drainage connecting pipe and the inner wall of the drainage port of the inner cylinder; the lower end of the sealing ring is also provided with a baffle ring; the flange chassis of the drainage connecting pipe is connected with the outer cylinder through a bolt; a gasket is arranged between the flange base plate and the outer cylinder. The utility model provides a compact cylinder structure arrange the problem of not opening, also provide convenience for the positioning gap adjustment in the installation simultaneously.

Description

Device for positioning between inner cylinder and outer cylinder of steam turbine and draining inner cylinder

Technical Field

The utility model relates to a steam turbine technical field, concretely relates to be used for steam turbine interior outer cylinder to fix a position and hydrophobic device of inner casing within a definite time.

Background

At present, in order to improve the efficiency of a steam turbine, a high-rotating-speed single-row-stage unit is generally adopted, and for a high-temperature high-pressure and ultrahigh-pressure unit, steam parameters after a regulation stage are higher, and a double-layer cylinder structure is structurally adopted. It is necessary to consider the positioning between the inner and outer cylinders, and it is necessary to consider not only the drainage of the condensed water of the outer cylinder but also the drainage of the condensed water of the inner cylinder. In the structural design process of the steam turbine, especially for a small unit with high rotating speed and high efficiency, the arrangement on a cylinder body is very compact. In addition, in the installation process, the existing inner and outer cylinder positioning structures are troublesome in the process of adjusting and repairing gaps, the cylinders need to be hoisted repeatedly, and the device greatly improves the situation.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a device that is used for location and interior jar to be hydrophobic between outer jar in the steam turbine, solved the problem that cylinder compact structure arranged not to open, also provide convenience for the positioning gap adjustment in the installation simultaneously.

In order to solve the technical problem, the utility model discloses take following technical scheme: a device for positioning between inner and outer cylinders and draining the water of the inner cylinder in a steam turbine comprises a draining connecting pipe, a sealing ring, a baffle ring, a center pin and a gasket;

the drain connecting pipe comprises a hollow pipe body and a flange base plate arranged at the bottom of the hollow pipe body; a drain hole communicated with the hollow pipe body is formed in the center of the flange base plate;

a pin hole for inserting the center pin is arranged in the outer cylinder; the center of the center pin is provided with a center channel for the drainage connecting pipe to pass through; the center pin is inserted into the pin hole of the outer cylinder; the top of the inner cylinder extends into the positioning groove of the inner cylinder;

the inner cylinder is provided with a drain hole above the positioning groove;

the hollow pipe body of the drainage connecting pipe penetrates through the central pin and extends into the drainage port; a sealing ring gasket is arranged at the top of the drain port; a sealing ring is arranged between the outer wall of the hollow pipe body of the drainage connecting pipe and the inner wall of a drainage port of the inner cylinder; the lower end of the sealing ring is also provided with a baffle ring; a catch ring groove is also arranged on the side wall of the drain hole of the inner cylinder; the baffle ring is arranged in the baffle ring groove;

the flange chassis of the drainage connecting pipe is connected with the outer cylinder through a bolt; a gasket is arranged between the flange chassis and the outer cylinder; the gasket is arranged on the periphery of the center pin.

Furthermore, the sealing ring comprises a first sealing ring and a second sealing ring; an arc-shaped groove is formed in the inner side of the first sealing ring; and an arc-shaped groove is formed in the outer side of the second sealing ring.

Furthermore, the bottom end of the central pin is provided with a limit stop ring; the outer cylinder is provided with a positioning groove matched with the limiting block.

Further, the section of the gasket is of a sawtooth structure.

The utility model has the advantages that: the utility model discloses make the hydrophobic and the interior, the outer cylinder of interior cylinder center pin of location usefulness as an organic whole, practiced thrift the space of arranging on the cylinder. The inner cylinder and the outer cylinder are positioned by adopting the repairable center pin to replace the original adjusting gasket structure, and the center pin can be directly taken out of the outer cylinder and put in the outer cylinder, so that the size adjustment of the center pin in the assembling process is greatly facilitated. The middle of the center pin is made into a hollow shape, and the drain joint penetrates through the middle and is connected to the inner cylinder for draining water.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 shows the positioning of conventional inner and outer cylinders and the hydrophobic structure of the inner cylinder.

Fig. 2 is a schematic view of fig. 1 in the direction B.

Fig. 3 is a sectional view taken along direction F of fig. 2.

Fig. 4 shows the positioning of the inner and outer cylinders and the inner cylinder drainage structure of the present invention.

Fig. 5 is a sectional view taken along the line a in fig. 4.

Fig. 6 is a partially enlarged view of fig. 4.

Detailed Description

The technical solution of the present invention will be described clearly and completely through the following detailed description.

Referring to fig. 1-3, the conventional positioning of the inner and outer cylinders and the inner cylinder drainage structure, it can be seen that the condensed water of the inner cylinder 110 is led out of the cylinder body through the special bolt 150 and the flange 180, the gasket 140 and the special bolt 150 form the sealing member of the inner cylinder drainage hole to prevent the steam from leaking into the interlayer of the inner and outer cylinders, and the gasket 160, the special nut 170, the flange 180 and the special bolt 150 form the sealing member to prevent the steam from leaking out of the cylinder. In the figure, the center positioning of the bottom of the inner cylinder and the bottom of the outer cylinder is realized by the adjusting block 130, the adjusting block 130 needs to be repeatedly repaired and assembled in order to ensure the installation gap, and the operation is troublesome because the inner cylinder needs to be hung out every time of repair and assembly in the interlayer of the inner cylinder and the outer cylinder. Also, as can be seen from fig. 1, the arrangement of the hydrophobic means alongside the cylinder positioning means requires more space on the cylinder. The apparatus of the present invention of fig. 2 is designed to ameliorate the disadvantages of this conventional arrangement.

As shown in fig. 4-6, the device for positioning between the inner and outer casings and draining water from the inner casing of the steam turbine of the present invention includes a draining connection pipe 260, a sealing ring, a baffle ring 250, a center pin 270 and a gasket 280; the drainage adapter 260 comprises a hollow pipe body and a flange base plate arranged at the bottom of the hollow pipe body; a drain hole communicated with the hollow pipe body is formed in the center of the flange base plate; a pin hole for inserting the center pin 270 is formed in the outer cylinder 220; the center of the center pin 270 is provided with a central channel for the drainage connecting pipe 260 to pass through; the center pin 270 is inserted into the pin hole of the outer cylinder 220; the top of the inner cylinder 210 extends into the positioning groove; the inner cylinder 210 is provided with a drain hole above the positioning groove; the hollow pipe body of the drainage connecting pipe 260 passes through the central pin 270 and extends into the drainage port; a sealing ring gasket is arranged at the top of the drain port; a sealing ring is arranged between the outer wall of the hollow pipe body of the drainage connecting pipe 260 and the inner wall of the drainage port of the inner cylinder 210; the sealing ring comprises a first sealing ring 230 and a second sealing ring 240; an arc-shaped groove is formed in the inner side of the first sealing ring 230; an arc-shaped groove is formed on the outer side of the second sealing ring 240.

The lower end of the sealing ring is also provided with a baffle ring 250; a catch ring groove is also arranged on the side wall of the drain opening of the inner cylinder 210; the baffle ring 250 is arranged in the baffle ring groove; the flange chassis of the drainage connecting pipe 260 is connected with the outer cylinder 220 through bolts; a gasket 280 is arranged between the flange chassis and the outer cylinder 220; the spacer 280 is disposed on the outer circumference of the center pin 270. The gasket 280 has a saw-toothed cross-section.

The bottom end of the central pin 270 of the utility model is provided with a limit stop ring; the outer cylinder 220 is provided with a positioning groove matched with the limit stop.

The utility model discloses in cylinder 210 drainage lead to the cylinder outside through hydrophobic takeover 260, realize the sealed of interior cylinder 210 hydrophobic hole department of opening through inside and outside sealing ring, fender ring 250. The positioning between the inner cylinder and the outer cylinder is realized by the central pin 270, the drawing clearance requirement is ensured by repairing the central pin 270, and the central pin 270 can be directly taken out from the outer cylinder 220 to be adjusted under the condition of not moving the inner cylinder 210 in the assembling process, so that the assembling process is facilitated. As can be seen from the figure of the apparatus, the water-draining connecting pipe 260 of the inner cylinder 210 passes through the center pin 270 for positioning, and the arrangement on the cylinder is more compact compared with the conventional structure. The outer cylinder 220 is sealed by means of a hydrophobic nipple 260 and a gasket 280. In addition, the axial positioning positions of the inner cylinder and the outer cylinder are basically consistent with the center line of the drainage connecting pipe 260, so that the damage of the drainage connecting pipe caused by the expansion difference of the inner cylinder and the outer cylinder is avoided, and the air leakage of the cylinder is avoided.

The above-mentioned embodiments are only described as the preferred embodiments of the present invention, and are not intended to limit the concept and scope of the present invention, and the technical content of the present invention, which is claimed by the present invention, is fully recorded in the technical claims.

Claims

1. A device that is used for location and interior jar drainage between steam turbine inner and outer jar, its characterized in that: comprises a hydrophobic connecting pipe (260), a sealing ring, a baffle ring (250), a center pin (270) and a gasket (280);

the drainage connecting pipe (260) comprises a hollow pipe body and a flange base plate arranged at the bottom of the hollow pipe body; a drain hole communicated with the hollow pipe body is formed in the center of the flange base plate;

a pin hole for inserting the center pin (270) is arranged in the outer cylinder (220); the center of the center pin (270) is provided with a central channel for the drainage connecting pipe (260) to pass through; the center pin (270) is inserted into the pin hole of the outer cylinder (220); the top of the inner cylinder (210) extends into a positioning groove of the inner cylinder;

a water drainage port is arranged above the positioning groove of the inner cylinder (210);

the hollow pipe body of the water drainage connecting pipe (260) penetrates through the central pin (270) and extends into the water drainage port; a sealing ring gasket is arranged at the top of the drain port; a sealing ring is arranged between the outer wall of the hollow pipe body of the drainage connecting pipe (260) and the inner wall of a drainage port of the inner cylinder (210); the lower end of the sealing ring is also provided with a baffle ring (250); a catch ring groove is also arranged on the side wall of the drain opening of the inner cylinder (210); the baffle ring (250) is arranged in the baffle ring groove;

the flange chassis of the drainage connecting pipe (260) is connected with the outer cylinder (220) through a bolt; a gasket (280) is arranged between the flange chassis and the outer cylinder (220); the gasket (280) is arranged on the periphery of the center pin (270).

2. The apparatus of claim 1 for positioning between the inner and outer casings of a steam turbine and draining water from the inner casing, wherein: the sealing ring comprises a first sealing ring (230) and a second sealing ring (240); an arc-shaped groove is formed in the inner side of the first sealing ring (230); and an arc-shaped groove is formed in the outer side of the second sealing ring (240).

3. The apparatus of claim 1 for positioning between the inner and outer casings of a steam turbine and draining water from the inner casing, wherein: the bottom end of the center pin (270) is provided with a limit stop ring; the outer cylinder (220) is provided with a positioning groove matched with the limiting block.

4. The apparatus of claim 1 for positioning between the inner and outer casings of a steam turbine and draining water from the inner casing, wherein: the section of the gasket (280) is of a sawtooth structure.