A control device for an emergency shutdown system of a small steam turbine

Abstract

This application discloses a control device for an emergency shutdown system of a small steam turbine, belonging to the field of steam turbine technology. It includes a transfer connection pipe, with multiple pressure relief pipes fixedly connected to its exterior in a ring-shaped, equally spaced structure. A hinged opening / closing plate is mounted on one side of each pressure relief pipe. A compression frame is slidably connected between the multiple opening / closing plates. A reference shaft is fixedly connected to the center of the compression frame, and a spring is sleeved on the outside of the reference shaft. A sealing plug adapted to the transfer connection pipe is fixedly connected to the center of the reference shaft. A guide plate is provided on one side of the sealing plug, and the guide plate slides in cooperation with the reference shaft. This application utilizes the elastic reset of the displaced reference shaft after the high-pressure steam supply stops. This not only allows for the closure of the transfer connection pipe but also enables the opening of multiple pressure relief pipes for multi-channel automatic pressure relief of the transfer connection pipe, improving the ease of use of the device.

Description

Technical Field

[0001] This application relates to the field of steam turbine technology, and more specifically, to a control device for an emergency shutdown system of a small steam turbine. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through a fixed nozzle, becomes an accelerated airflow, and is then injected onto the blades, causing the rotor, which is equipped with rows of blades, to rotate and perform work. However, after the steam turbine is running, the high-pressure steam remaining on the inner wall of the high-pressure pipe cannot be effectively released. This residue on the inner wall of the high-pressure pipe can easily cause damage to the pipe wall and affect the service life of the high-pressure pipe.

[0003] The prior art publication (announcement) document CN119062412A provides an automatic pneumatic emergency shutdown protection system for a small steam turbine. In this related technology, the use of a baffle frame and a baffle ring allows steam in the pipe to enter the guide pipe when the steam engine stops running, and then be discharged through the guide pipe. This avoids the generation of high pressure in the pipe, which can easily cause damage to the pipe, and improves the effectiveness of the device.

[0004] Although the existing technical solutions described above can achieve the relevant beneficial effects through the existing technical structure, they still have the following defects: the pressure relief structure of the system requires the control of the electric telescopic rod to open and close, and cannot achieve automatic pressure relief protection. The structure needs to be optimized.

[0005] In view of this, we propose a control device for an emergency shutdown system of a small steam turbine. Utility Model Content

[0006] To address the problems mentioned in the background art, this application provides a control device for a small steam turbine emergency shutdown system.

[0007] The control device for the emergency shutdown system of a small steam turbine provided in this application adopts the following technical solution:

[0008] A control device for an emergency shutdown system of a small steam turbine includes a transfer coupling pipe. Multiple pressure relief pipes are fixedly connected to the outside of the transfer coupling pipe in a ring-shaped, equally spaced configuration. A gate plate is hinged to one side of each pressure relief pipe. A compression frame is slidably connected between the multiple gate plates. A reference shaft is fixedly connected to the center of the compression frame. A spring is sleeved on the outside of the reference shaft, and a sealing plug adapted to the transfer coupling pipe is fixedly connected to the center of the reference shaft. A guide plate is provided on one side of the sealing plug, and the guide plate slides in cooperation with the reference shaft.

[0009] By adopting the above technical solution, the reference shaft is elastically displaced by the impact of high-pressure steam on the sealing plug, thereby opening the transfer connection pipe. When the passage is activated, the displaced reference shaft drives the extrusion frame to squeeze the opening and closing plate to close the pressure relief pipe, realizing the flow application of the transfer connection pipe. When the high-pressure steam supply stops, the displaced reference shaft elastically resets, which can not only close the port of the transfer connection pipe, but also open multiple pressure relief pipes to perform multi-channel automatic pressure relief treatment of the transfer connection pipe, improving the convenience of the device.

[0010] As an optional solution to the technical solution of this application, the end face of the pressure relief pipe is inclined and a sealing ring is fixedly connected to the end face of the pressure relief pipe.

[0011] By adopting the above technical solution, and utilizing the inclined structure of the opening and closing plate end face, it can be ensured that after the squeezing frame pulls the opening and closing plate to open the pressure relief pipe channel, the pressure relief pipe has a large-diameter exhaust gap, and the sealing ring fixed to the end face of the pressure relief pipe can improve the sealing performance between it and the pressure relief pipe.

[0012] As an optional solution to the technical solution of this application, the extrusion frame is arranged in a cross structure, and each shaft end of the extrusion frame arranged in a cross structure is rotatably connected to a roller sleeve.

[0013] By adopting the above technical solution, the extrusion frame with a cross structure is rotatably connected to roller sleeves at each shaft end, which can reduce the sliding friction resistance between the extrusion frame and the opening and closing plate, making the sliding cooperation between the two smooth.

[0014] As an optional solution to the technical solution of this application, a sealing gasket with a stepped structure is fixedly attached to the edge of the sealing plug.

[0015] By adopting the above technical solution and utilizing the stepped gasket, the tightness of the fit between the sealing plug and the transfer pipe can be improved, thereby enhancing the sealing performance.

[0016] As an optional solution to the technical solution of this application, the guide plate has two sealing grooves with a symmetrical structure on its outside, and a sealing ring is fixedly connected in the sealing groove.

[0017] By adopting the above technical solution, the guide plate with added sealing ring can be installed between the external pipe body and the transfer coupling pipe to seal, thereby improving the installation performance.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. This application utilizes high-pressure steam to impact the sealing plug, causing the reference shaft to elastically displace, thereby opening the transfer connection pipe. When the passage is activated, the displaced reference shaft drives the extrusion frame to squeeze the opening and closing plate to close the pressure relief pipe, enabling the transfer connection pipe to flow. When the high-pressure steam supply stops, the displaced reference shaft elastically resets, which not only closes the port of the transfer connection pipe but also opens multiple pressure relief pipes to perform multi-channel automatic pressure relief of the transfer connection pipe, improving the ease of use of the device.

[0020] 2. By utilizing the inclined structure of the end face of the opening and closing plate, this application can ensure that after the extrusion frame pulls the opening and closing plate to open the pressure relief pipe channel, the pressure relief pipe has a large-diameter exhaust gap, and the sealing ring fixed to the end face of the pressure relief pipe can improve the sealing performance between it and the pressure relief pipe. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the emergency shutdown system control device for a small steam turbine in this application.

[0022] Figure 2 This is a partial structural diagram of the control device for the emergency shutdown system of a small steam turbine in this application.

[0023] Figure 3 This is a schematic diagram of the sealing gasket structure of the control device for the emergency shutdown system of a small steam turbine in this application;

[0024] The following are the labels in the diagram: 1. Transfer pipe; 2. Pressure relief pipe; 3. Opening and closing plate; 4. Extrusion frame; 5. Reference shaft; 6. Sealing plug; 7. Guide plate; 41. Roller sleeve; 61. Sealing gasket. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] Reference Figure 1 and Figure 2 The present application describes a small steam turbine emergency shutdown system control device, which includes a transfer connection pipe 1. Multiple pressure relief pipes 2 are fixedly connected to the outside of the transfer connection pipe 1 in an annular, equally spaced structure. A gate plate 3 is hinged to one side of each pressure relief pipe 2. A compression frame 4 is slidably connected between the multiple gate plates 3. A reference shaft 5 is fixedly connected to the center of the compression frame 4. A spring is sleeved on the outside of the reference shaft 5, and a sealing plug 6 adapted to the transfer connection pipe 1 is fixedly connected to the center of the reference shaft 5. A guide plate 7 is provided on one side of the sealing plug 6. The guide plate 7 slides with the reference shaft 5, and two sealing grooves are symmetrically formed on the outside of the guide plate 7. A sealing ring is fixedly connected inside each sealing groove.

[0027] The emergency shutdown system control device for this small steam turbine utilizes high-pressure steam to impact the sealing plug 6, pushing the reference shaft 5 to elastically displace, thereby opening the transfer connection pipe 1. When the passage is activated, the displaced reference shaft 5 drives the compression frame 4 to compress the opening and closing plate 3, closing the pressure relief pipe 2 and enabling the flow of the transfer connection pipe 1. When the high-pressure steam supply stops, the displaced reference shaft 5 elastically resets, which can not only close the passage of the transfer connection pipe 1 but also open multiple pressure relief pipes 2 to perform multi-channel automatic pressure relief of the transfer connection pipe 1, improving the ease of use of the device.

[0028] Reference Figure 1 In the small steam turbine emergency shutdown system control device described in this application embodiment, the end face of the pressure relief pipe 2 is set with an inclined structure, and a sealing ring is fixedly connected to the end face of the pressure relief pipe 2.

[0029] The emergency shutdown system control device for this small steam turbine, by utilizing the inclined structure of the end face of the opening and closing plate 3, can ensure that after the squeezing frame 4 pulls the opening and closing plate 3 to open the pressure relief pipe 2 channel, the pressure relief pipe 2 has a large-diameter exhaust gap, and the sealing ring fixed to the end face of the pressure relief pipe 2 can improve the sealing performance between it and the pressure relief pipe 2.

[0030] Reference Figure 2 and Figure 1 In the small steam turbine emergency shutdown system control device described in this application embodiment, the extrusion frame 4 is arranged in a cross structure, and each shaft end of the extrusion frame 4, which is arranged in a cross structure, is rotatably connected to a roller sleeve 41.

[0031] The emergency shutdown system control device for this small steam turbine reduces the sliding friction resistance between the extrusion frame 4 and the opening / closing plate 3 by using a cross-shaped structure where each shaft end of the extrusion frame 4 is rotatably connected to a roller sleeve 41, thus ensuring smooth sliding and replacement of the two.

[0032] Reference Figure 3 and Figure 2 In the small steam turbine emergency shutdown system control device described in this application embodiment, a sealing gasket 61 with a stepped structure is fixedly attached to the edge of the sealing plug 6.

[0033] The emergency shutdown system control device for this small steam turbine can improve the tightness of the fit between the sealing plug 6 and the transfer connection pipe 1 by using a stepped sealing gasket 61, thereby enhancing the sealing performance.

[0034] Working principle: When the high-pressure steam supplied by the external pipe impacts the sealing plug 6, the sealing plug 6, which is subjected to thrust, drives the fixed reference shaft 5 to compress the spring component and make elastic displacement, thereby opening the transfer connection pipe 1 and realizing the passage action.

[0035] At this time, the displacement reference axis 5 drives the extrusion frame 4 to extrude the opening and closing plate 3 to close the pressure relief pipe 2, realizing the circulation application of the transfer connection pipe 1;

[0036] When the high-pressure steam supply stops, the displacement reference axis 5 is elastically reset. When the port of the transfer connecting pipe 1 is closed, the opening and closing plate 3 is pulled open under the action of the squeezing frame 4 to open the pressure relief pipe 2 channel and release the gas inside the transfer connecting pipe 1.

Claims

1. A control device for an emergency shutdown system of a small steam turbine, characterized in that, The device includes a transfer connecting pipe (1), which has multiple pressure relief pipes (2) fixedly connected to its exterior in an annular, equally spaced structure. A hinged opening and closing plate (3) is installed on one side of each pressure relief pipe (2). A compression frame (4) is slidably connected between the multiple opening and closing plates (3). A reference shaft (5) is fixedly connected to the middle of the compression frame (4). A spring is sleeved on the outside of the reference shaft (5), and a sealing plug (6) that can be adapted to the transfer connecting pipe (1) is fixedly connected to the middle of the reference shaft (5). A guide plate (7) is provided on one side of the sealing plug (6), and the guide plate (7) is slidably engaged with the reference shaft (5).

2. The control device for the emergency shutdown system of a small steam turbine according to claim 1, characterized in that: The pressure relief pipe (2) has an inclined end face and a sealing ring is fixed to the end face of the pressure relief pipe (2).

3. The control device for the emergency shutdown system of a small steam turbine according to claim 1, characterized in that: The extrusion frame (4) is arranged in a cross structure, and each shaft end of the extrusion frame (4) is rotatably connected to a roller sleeve (41).

4. The control device for the emergency shutdown system of a small steam turbine according to claim 1, characterized in that: A stepped gasket (61) is fixedly attached to the edge of the sealing plug (6).

5. The control device for the emergency shutdown system of a small steam turbine according to claim 1, characterized in that: The guide disc (7) has two sealing grooves with a symmetrical structure on the outside, and a sealing ring is fixedly connected in the sealing groove.

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