CN214533093U

CN214533093U - Steam turbine exhaust casing

Info

Publication number: CN214533093U
Application number: CN202120922331.6U
Authority: CN
Inventors: 吴晓清
Original assignee: Hangzhou Chuangbo Mechanical Equipment Co ltd
Current assignee: Hangzhou Chuangbo Mechanical Equipment Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-10-29
Anticipated expiration: 2031-04-30

Abstract

The utility model discloses a steam turbine exhaust casing, including the exhaust casing body, set up its inside and outside pressure release hole of intercommunication on the exhaust casing body, the outside extension in pressure release hole has the installation pipe, install pressure release subassembly on the installation pipe, pressure release subassembly is including seting up inlet opening and exhaust opening's pressure release casing, the internal mounting panel that is fixed with of pressure release casing, gliding guide bar is installed to the mounting panel, shelter from is installed to the one end of guide bar pressure release casing inlet opening's clamp plate, install the spring on the guide bar between clamp plate and the mounting panel, the one end of pressure release casing exhaust opening and discharge is connected, the intercommunicating pore has been seted up at the middle part of discharge. When the steam pressure in the exhaust cylinder is overlarge, the steam in the exhaust cylinder is discharged and forms jet flow to suck water, and the steam and the water are mixed to realize cooling and condensation of the steam, so that the safety of the exhaust cylinder and the safety of steam discharge are ensured.

Description

Steam turbine exhaust casing

Technical Field

The utility model relates to a steam turbine technical field specifically is a steam turbine exhaust casing.

Background

The low-pressure section of the single-cylinder turbine and the low-pressure cylinder of the multi-cylinder turbine are generally called as an exhaust cylinder of the turbine, the steam pressure and the temperature born in the exhaust cylinder are low, the steam entering the exhaust cylinder does not meet the parameter condition of acting, the steam is condensed to a condenser and then enters a boiler for heating, or the steam in the exhaust cylinder is discharged into other pipelines for heating and other purposes, when the steam pressure in the exhaust cylinder is too high, the exhaust cylinder can be damaged, and the existing exhaust cylinder can not safely and effectively carry out pressure relief.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a steam turbine exhaust casing, when steam pressure was too big in the exhaust casing, steam discharge, steam formation efflux suction water in the exhaust casing, steam and water mix the cooling that realizes steam and condense, have guaranteed the safety of exhaust casing and steam emission's safety, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a steam turbine exhaust casing, includes the exhaust casing body, set up its inside and outside pressure release hole of intercommunication on the exhaust casing body, the outside extension in pressure release hole has the installation pipe, install the pressure release subassembly on the installation pipe.

The pressure release subassembly is including offering air inlet opening and exhaust opening's pressure release casing, the pressure release casing internal fixation has the mounting panel, gliding guide bar is installed to the mounting panel, the one end of guide bar is installed and is sheltered from pressure release casing air inlet opening's clamp plate, install the spring on the guide bar between clamp plate and the mounting panel.

The pressure relief shell is characterized in that the exhaust opening of the pressure relief shell is connected with one end of a gas collecting pipe, a communicating hole is formed in the middle of the gas collecting pipe, and the outer side of the communicating hole is connected with one end of a water guide pipe.

As a preferred technical scheme of the utility model, the pressure release subassembly still includes screw rod, bearing and elastic component, the screw rod inside and outside run through the pressure release casing and with pressure release casing threaded connection, the screw rod is located the one end of the one end in the pressure release casing and the one end of elastic component and passes through the bearing and be connected, the other end of elastic component and the outside of guide bar are connected.

As an optimized technical proposal of the utility model, one end of the screw rod outside the pressure relief shell is fixed with a handle.

As a preferred technical scheme of the utility model, still including offering first opening and second open-ended condensation casing, the one end that pressure release casing was kept away from to condensation casing first opening and collecting pipe is connected, the second opening of condensation casing and the one end of connecting pipe are connected.

As an optimized technical scheme of the utility model, be equipped with a plurality of spheroid in the condensation casing, the first opening of condensation casing is towards the spheroid.

As an optimal technical scheme of the utility model, the direction slide opening has been seted up on the mounting panel, the outside sliding connection of the inner wall that the direction slide opening got and guide bar.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses the steam turbine exhaust casing of example, when this internal thrust that steam gives the clamp plate of exhaust casing is greater than the thrust that the spring gave the clamp plate, the clearance appears between clamp plate and the pressure release casing inlet opening, steam flow velocity grow in the gas collecting pipe, the gas pressure step-down in the gas collecting pipe, the water that pressure differential, aqueduct extraction water source appear at the aqueduct both ends enter into the gas collecting pipe and with the steam mixing in the gas collecting pipe, realize that the cooling of steam condenses.

2. The utility model discloses the steam turbine exhaust casing of example, through the rotatory screw rod of handle, the screw rod is located the length change of pressure release casing, adjusts the effort of elastic component to the guide bar to adjust the effort of guide bar to the clamp plate, realize the regulation of exhaust casing body pressure release scope.

3. The utility model discloses the steam turbine exhaust casing of example, the mixture of collector spun steam and water enters into in the condensation casing, realizes that the cooling of steam condenses, and the mixture of steam and water spouts on the spheroid, and the spheroid absorbs the heat of steam for condensing of steam, and the spheroid reduces the impact of steam to condensation shells inner wall, reduces the loss rate of condensation casing.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the partial cross-sectional structure of FIG. 1;

fig. 3 is an enlarged view of a structure of fig. 2.

In the figure: the air-conditioning system comprises a cylinder body 1, a screw rod 2, a gas collecting pipe 3, a condensation shell 4, a connecting pipe 5, a pressure relief shell 6, a water guide pipe 7, an installation pipe 8, a guide rod 9, a ball 10, a handle 11, a pressing plate 12, a bearing 13, an elastic part 14, an installation plate 15 and a spring 16.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further described with reference to the accompanying drawings and examples.

The first embodiment is as follows: referring to fig. 1-3, the present embodiment discloses a steam turbine exhaust casing, which includes an exhaust casing body 1, the exhaust casing body 1 is provided with a pressure relief hole communicating the inside and the outside of the exhaust casing body, the pressure relief hole extends outward to form an installation pipe 8, and the installation pipe 8 is provided with a pressure relief assembly.

The pressure relief assembly comprises a pressure relief shell 6 provided with an air inlet and an air outlet, a mounting plate 15 is fixed in the pressure relief shell 6, a sliding guide rod 9 is mounted on the mounting plate 15, a pressure plate 12 for shielding the air inlet of the pressure relief shell 6 is mounted at one end of the guide rod 9, and a spring 16 is mounted on the guide rod 9 between the pressure plate 12 and the mounting plate 15.

Furthermore, a guide sliding hole is formed in the mounting plate 15, and the inner wall of the guide sliding hole is connected with the outer side of the guide rod 9 in a sliding manner; or the mounting plate 15 is provided with a guide groove, and the guide rod 9 is provided with a limit convex strip matched with the guide groove.

An exhaust opening of the pressure relief shell 6 is connected with one end of the gas collecting pipe 3, a communication hole is formed in the middle of the gas collecting pipe 3, and the outer side of the communication hole is connected with one end of the water guide pipe 7; the area of the steam flow cross section in the gas collecting pipe 3 is smaller than that of the steam flow cross section in the pressure relief shell 6; the end of the water conduit 7 remote from the gas collecting conduit 3 is inserted into the water source.

The exhaust casing body 1 is a component of a steam turbine in the prior art, and the structure and the assembly mode thereof are disclosed in the prior art and are not described herein again.

The working process and principle of the embodiment are as follows:

initially, the spring 16 pushes the pressure plate 12 to shield the air inlet opening of the pressure relief housing 6, so that the communication state between the inner cavity of the pressure relief housing 6 and the inner cavity of the exhaust steam cylinder body 1 is blocked, the thrust of steam in the exhaust steam cylinder body 1 to the pressure plate 12 is smaller than the thrust of the spring 16 to the pressure plate 12, and the steam in the exhaust steam cylinder body 1 cannot enter the pressure relief housing 6.

When the thrust of steam in the exhaust cylinder body 1 for the pressure plate 12 is greater than the thrust of the spring 16 for the pressure plate 12, a gap appears between the pressure plate 12 and the air inlet opening of the pressure relief shell 6, the steam in the exhaust cylinder body 1 passes through the installation pipe 8, the pressure relief shell 6 enters the gas collecting pipe 3, the cross-sectional area of the steam flow of the gas collecting pipe 3 is reduced, the flow velocity of the steam in the gas collecting pipe 3 is increased, the air pressure in the gas collecting pipe 3 is reduced, the pressure difference appears at the two ends of the water guide pipe 7, the water in the water source extracted by the water guide pipe 7 enters the gas collecting pipe 3 and is mixed with the steam in the gas collecting pipe 3, and the cooling and condensation of the steam are realized.

Preferably, the water extracted by the water guide pipe 7 is boiler storage water, and the water condensed by the steam flows into the collecting box, so that the consumption of the boiler storage water is reduced, the temperature of the boiler storage water can be raised, and the loss of heat energy is reduced.

Example two: as shown in fig. 2 and fig. 3, the present embodiment discloses a steam turbine exhaust casing, which has a structure substantially the same as that of the first embodiment, except that the pressure relief assembly of the present embodiment further includes a screw rod 2, a bearing 13 and an elastic member 14, the screw rod 2 penetrates through the pressure relief housing 6 from inside to outside and is in threaded connection with the pressure relief housing 6, the length of the screw rod 2 in the pressure relief housing 6 can be adjusted by rotating the screw rod 2, one end of the screw rod 2 in the pressure relief housing 6 is connected with one end of the elastic member 14 through the bearing 13, the other end of the elastic member 14 is connected with the outside of the guide rod 9, and the bearing 13 prevents the elastic member 14 from rotating with the screw rod 2 or prevents the elastic member 14 from preventing the screw rod 2 from rotating; preferably, one end of the screw 2 located in the relief housing 6 is inclined in a direction away from the air inlet opening of the relief housing 6, and the longitudinal direction of the elastic member 14 is close to the longitudinal direction of the screw 2.

Further, a handle 11 is fixed at one end of the screw rod 2, which is located outside the pressure relief shell 6, and the handle 11 is convenient for rotating the screw rod 2.

The elastic member 14 is a rubber elastic rod or a spring.

The working process and principle of the embodiment are as follows:

through the rotatory screw rod 2 of handle 11, the screw rod 2 is located the length change of pressure release casing 6, adjusts the effort of elastic component 14 to guide bar 9 to adjust the effort of guide bar 9 to clamp plate 12, realize the regulation of exhaust cylinder body 1 pressure release scope.

Example three: as shown in fig. 1 and fig. 2, the present embodiment discloses a steam turbine exhaust casing, which further includes a condensation casing 4 having a first opening and a second opening, the first opening of the condensation casing 4 is connected to one end of the collecting pipe 3 away from the pressure relief casing 6, and the second opening of the condensation casing 4 is connected to one end of the connecting pipe 5.

Furthermore, a plurality of spheres 10 are arranged in the condensation shell 4, and a first opening of the condensation shell 4 faces the spheres 10; the ball 10 is preferably made of metal.

The working process and principle of the embodiment are as follows:

the mixture of steam and water that the discharge 3 spun enters into condensation casing 4, realizes the cooling of steam and condenses, and the mixture of steam and water spouts on spheroid 10, and spheroid 10 absorbs the heat of steam for the condensation of steam, and the spheroid reduces the impact of steam to 4 inner walls of condensation casing, reduces the loss rate of condensation casing 4.

The parts which are not disclosed in the utility model are the prior art, and the specific structure, materials and working principle are not detailed; the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and the embodiments of the present invention are not limited by the above embodiments, and for those skilled in the art, any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the principles of the present invention should be equivalent replacement modes, and all of them should be covered in the scope of the claims and the specification of the present invention.

Claims

1. A steam turbine exhaust casing comprising an exhaust casing body (1), characterized in that: the exhaust cylinder body (1) is provided with a pressure relief hole communicated with the inside and the outside of the exhaust cylinder body, the pressure relief hole extends outwards to form an installation pipe (8), and a pressure relief assembly is installed on the installation pipe (8);

the pressure relief assembly comprises a pressure relief shell (6) provided with an air inlet and an air outlet, a mounting plate (15) is fixed in the pressure relief shell (6), a sliding guide rod (9) is mounted on the mounting plate (15), a pressure plate (12) for shielding the air inlet of the pressure relief shell (6) is mounted at one end of the guide rod (9), and a spring (16) is mounted on the guide rod (9) between the pressure plate (12) and the mounting plate (15);

the exhaust opening of the pressure relief shell (6) is connected with one end of the gas collecting pipe (3), the middle of the gas collecting pipe (3) is provided with a communicating hole, and the outer side of the communicating hole is connected with one end of the water guide pipe (7).

2. The turbine exhaust casing according to claim 1, wherein: the pressure relief assembly further comprises a screw rod (2), a bearing (13) and an elastic piece (14), the screw rod (2) penetrates through the pressure relief shell (6) from inside to outside and is in threaded connection with the pressure relief shell (6), one end of the screw rod (2) located in the pressure relief shell (6) and one end of the elastic piece (14) are connected through the bearing (13), and the other end of the elastic piece (14) is connected with the outer side of the guide rod (9).

3. The turbine exhaust casing according to claim 2, wherein: and a handle (11) is fixed at one end of the screw rod (2) positioned outside the pressure relief shell (6).

4. The turbine exhaust casing according to claim 1, wherein: still including offering first opening and second open-ended condensation casing (4), the one end that pressure release casing (6) were kept away from in condensation casing (4) first opening and collecting pipe (3) is connected, the second opening of condensation casing (4) and the one end of connecting pipe (5) are connected.

5. The turbine exhaust casing according to claim 4, wherein: a plurality of spheres (10) are arranged in the condensation shell (4), and a first opening of the condensation shell (4) faces the spheres (10).

6. The turbine exhaust casing according to claim 1, wherein: the mounting plate (15) is provided with a guide sliding hole, and the inner wall of the guide sliding hole is connected with the outer side of the guide rod (9) in a sliding manner.