Manhole structure for draft tube of generator set

Abstract

The utility model discloses a manhole structure for a draft tube of a generator set, which comprises a manhole body, a tube opening is arranged at the top end of the manhole body, a protective cover is arranged at the top end of the tube opening, the manhole structure further comprises a sealing mechanism, and the sealing mechanism comprises a movable groove arranged in the tube opening. A connecting ring is rotationally connected into the movable groove, a polygonal groove is formed in one side of the connecting ring, a sealing plate is rotationally connected into the polygonal groove, a guide assembly is installed at one end of the sealing plate, a driving assembly is installed at the other end of the sealing plate, and a handle is installed at the outer end of the connecting ring. A guide plate is fixedly connected to the position, located above the sealing plate, in the pipe opening. The utility model relates to an exhaust water pipe manhole, in particular to an exhaust water pipe manhole for solving the problem that potential safety hazards exist due to the fact that existing exhaust water pipe manholes of partial power plant units are opened towards the outer side of an exhaust water pipe and are poor in overall sealing performance and running water can permeate into the manholes under the action of water pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of manhole access holes for generator sets, in particular to a manhole access hole structure for a tailwater pipe of a generator set. Background Art

[0002] The tailwater pipe is the basic structure of the hydropower station plant, which has a great influence on the layout and structure of the plant. The tailwater pipe is divided into straight cone and elbow shapes. It is located below the runner and is the main flow-through component. Its function is to guide the water flow in and out of the runner. The manhole, usually referred to as the manhole, is an open hole structure for personnel to enter and exit. The manhole is mainly set on pipelines, containers or equipment to facilitate installation, maintenance, safety inspection and escape in emergency situations.

[0003] However, it still has the following disadvantages in actual use:

[0004] The tailwater pipe manholes of some existing power plant units are opened toward the outside of the tailwater pipe. Due to the poor overall sealing of the manhole, under the action of water pressure, flowing water will penetrate into the interior of the manhole, posing a safety hazard. Utility Model Content

[0005] The utility model aims to provide a manhole structure for the tailwater pipe of a generator set, so as to solve the problem proposed in the above background technology that the manholes of the tailwater pipes of some existing power plant units are opened toward the outside of the tailwater pipe, and due to the poor overall sealing of the manhole, under the action of water pressure, the flowing water will penetrate into the interior of the manhole, posing a safety hazard.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a manhole structure for a tailwater pipe of a generator set, comprising a manhole body, a pipe mouth is installed at the top of the manhole body, a protective cover is installed at the top of the pipe mouth, and a sealing mechanism is also included: the sealing mechanism comprises a movable groove arranged inside the pipe mouth, a connecting ring is rotatably connected inside the movable groove, a polygonal groove is provided on one side of the connecting ring, a sealing plate is rotatably connected inside the polygonal groove, a guide assembly is installed at one end of the sealing plate, a driving assembly is installed at the other end of the sealing plate, a handle is installed at the outer end of the connecting ring, a guide plate is fixedly connected to the inside of the pipe mouth above the sealing plate, a mounting frame is fixedly connected to the outer surface of the pipe mouth, a second bolt is threadedly connected to one end of the mounting frame, and a spiral groove is provided at one end of the handle; a disassembly and assembly mechanism: the disassembly and assembly mechanism is arranged inside the protective cover.

[0008] Furthermore, the disassembly and assembly mechanism includes a screw groove arranged inside the protective cover, the internal thread of the screw groove is connected to a first bolt, the inside of the protective cover is fixedly connected to a guide frame, the inner side of the guide frame is slidably connected to a spring plate, an elastic component is installed at the inner center of the protective cover, the inner side of the guide frame is rotatably connected to a rotating gear above the spring plate, and one end of the spring plate is fixedly connected to a mounting plate.

[0009] Furthermore, the elastic component includes a spring block arranged at the inner center of the protective cover, and tooth grooves are formed on four sides of the spring block. The spring block and the rotating gear are meshingly connected.

[0010] Furthermore, one side of the spring plate is provided with teeth, and the spring plate and the rotating gear are meshingly connected.

[0011] Furthermore, an installation groove is provided on the inner side wall of the pipe opening, and an extension opening is provided on the outer surface of the protective cover.

[0012] Furthermore, the guide assembly includes a guide block disposed below the sealing plate, and the guide block is slidably connected inside the polygonal groove.

[0013] Furthermore, the driving assembly includes a round block arranged at one end of the sealing plate, a circular arc groove is opened on one side of the guide plate, and the round block is slidably connected inside the circular arc groove.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The utility model is provided with a sealing mechanism. A staff member can turn over a handle that is movably connected inside a movable groove, so that the handle can be rotated to drive a connecting ring that is fixedly connected at one end to rotate, so that five groups of guide blocks can slide in the polygonal groove, and a sealing plate with a guide block fixedly connected at one end can be guided to slide. At the same time, a round block fixedly connected at one end of the sealing plate can be rotated in an arc groove provided inside the guide plate, so that multiple groups of sealing plates can be extended to the inside of the pipe mouth through the extension groove, so that the overall sealing of the inside of the manhole body can be increased, and water can be effectively prevented from penetrating into the inside of the manhole body, thereby ensuring safety.

[0016] Based on the above beneficial effects, a disassembly and assembly mechanism is provided. When the staff installs the protective cover and the pipe mouth, the staff can rotate the first bolt connected by the internal thread of the screw groove to make the first bolt extend to the inside of the protective cover through the screw groove, so that the first bolt can squeeze the spring block on the same horizontal plane, so that the spring block can slide and drive the four groups of rotating gears below the horizontal to rotate, and the four groups of rotating gears can rotate to drive the spring plate engaged and connected on one side to slide, so that the spring plate can slide along the guide track of the guide frame, and the mounting plate fixedly connected at one end of the spring plate can extend outward through the extension port and be inserted into the mounting groove opened on the inner wall of the pipe mouth. When the staff takes the protective cover and the pipe mouth, they can directly apply the above reverse steps, which can facilitate the staff to quickly disassemble and assemble the protective cover, and is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is an axonometric drawing of the utility model;

[0019] Figure 2 This is a disassembled diagram of the sealing component of the utility model;

[0020] Figure 3 It is a cross-sectional view of the utility model;

[0021] Figure 4 This is an exploded view of the sealing component of the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Manhole body; 2. Pipe mouth; 3. Protective cover; 4. First bolt; 5. Mounting frame; 6. Second bolt; 7. Handle; 8. Guide plate; 9. Sealing plate; 10. Guide block; 11. Connecting ring; 12. Movable groove; 13. Spring block; 14. Spring plate; 15. Rotating gear; 16. Guide frame; 17. Mounting plate; 18. Screw groove. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0026] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] See also Figure 1-4 As shown, this embodiment is a manhole structure for a tailwater pipe of a generator set, comprising a manhole body 1, a pipe mouth 2 is installed at the top of the manhole body 1, a protective cover 3 is installed at the top of the pipe mouth 2, and also comprises a sealing mechanism: the sealing mechanism comprises a movable groove 12 arranged inside the pipe mouth 2, a connecting ring 11 is rotatably connected inside the movable groove 12, a polygonal groove is provided on one side of the connecting ring 11, a sealing plate 9 is rotatably connected inside the polygonal groove, a guide assembly is installed at one end of the sealing plate 9, a driving assembly is installed at the other end of the sealing plate 9, a handle 7 is installed at the outer end of the connecting ring 11, a guide plate 8 is fixedly connected to the inside of the pipe mouth 2 above the sealing plate 9, a mounting frame 5 is fixedly connected to the outer surface of the pipe mouth 2, a second bolt 6 is threadedly connected to one end of the mounting frame 5, and a spiral groove is provided at one end of the handle 7; a disassembly mechanism: the disassembly mechanism is arranged inside the protective cover 3:

[0028] The sealing mechanism serves as the main bearing structure and can increase the sealing safety of the overall structure by being fixedly connected to the device as a whole.

[0029] The guide assembly comprises a guide block 10 arranged below the sealing plate 9, and the guide block 10 is slidably connected inside the polygonal groove.

[0030] The guide assembly is arranged so as to guide the rotation of the plurality of sealing plates 9 .

[0031] The driving assembly comprises a round block arranged at one end of the sealing plate 9, a circular arc groove is provided on one side of the guide plate 8, and the round block is slidably connected inside the circular arc groove.

[0032] The drive assembly is arranged so that multiple groups of sealing plates 9 can rotate simultaneously.

[0033] Working principle: the staff can turn the handle 7 that is movably connected inside the movable groove 12 to rotate the handle 7 to drive the connecting ring 11 that is fixedly connected at one end to rotate, so that the five groups of guide blocks 10 slide in the polygonal groove, and the sealing plate 9 with the guide block 10 fixedly connected at one end can slide in a guided manner. At the same time, the round block fixedly connected at one end of the sealing plate 9 can rotate in the arc groove opened inside the guide plate 8, so that multiple groups of sealing plates 9 can be extended to the inside of the pipe mouth 2 through the extension groove, which can increase the overall sealing of the inside of the manhole body 1.

[0034] See also Figure 1-4 As shown, this embodiment is based on the above-mentioned embodiment 1 and further includes: the disassembly and assembly mechanism includes a screw groove 18 arranged inside the protective cover 3, the internal thread of the screw groove 18 is connected to the first bolt 4, the inside of the protective cover 3 is fixedly connected to the guide frame 16, the inner side of the guide frame 16 is slidably connected to the spring plate 14, an elastic component is installed at the inner center of the protective cover 3, the inner side of the guide frame 16 is located above the spring plate 14 and is rotatably connected to the rotating gear 15, and one end of the spring plate 14 is fixedly connected to the mounting plate 17.

[0035] The elastic component includes a spring block 13 arranged at the center of the protective cover 3. Tooth grooves are formed on four sides of the spring block 13. The spring block 13 and the rotating gear 15 are meshedly connected.

[0036] The elastic component is arranged so that the spring block 13 can drive the four sets of rotating gears 15 to rotate simultaneously when the spring block 13 slides down.

[0037] The inner side wall of the pipe mouth 2 is provided with a mounting groove, and the outer surface of the protective cover 3 is provided with an extension opening.

[0038] The installation slot and the extension opening are arranged so that the installation plate 17 can be installed through the extension opening and the installation slot.

[0039] Working principle: When the staff installs the protective cover 3 and the pipe nozzle 2, the staff rotates the first bolt 4 connected by the internal thread of the screw groove 18, so that the first bolt 4 can extend to the inside of the protective cover 3 through the screw groove 18, so that the first bolt 4 can squeeze the spring block 13 on the same horizontal plane, so that the spring block 13 can slide and drive the four sets of rotating gears 15 below the horizontal to rotate, so that the four sets of rotating gears 15 rotate to drive the spring plate 14 engaged on one side to slide, so that the spring plate 14 slides along the guide track of the guide frame 16, so that the installation plate 17 fixedly connected at one end of the spring plate 14 extends outward through the extension port and is inserted into the installation groove opened on the inner wall of the pipe nozzle 2. When the staff takes the protective cover 3 and the pipe nozzle 2, they can directly apply the above-mentioned reverse steps;

[0040] This step can facilitate the staff to quickly disassemble and assemble the protective cover 3, which is convenient.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A manhole structure for a tailwater pipe of a generator set, comprising a manhole body (1), a pipe mouth (2) installed at the top of the manhole body (1), a protective cover (3) installed at the top of the pipe mouth (2), characterized in that: Also includes: Sealing mechanism: The sealing mechanism comprises a movable groove (12) arranged inside the pipe mouth (2), a connecting ring (11) is rotatably connected inside the movable groove (12), a polygonal groove is provided on one side of the connecting ring (11), a sealing plate (9) is rotatably connected inside the polygonal groove, a guide assembly is installed at one end of the sealing plate (9), a driving assembly is installed at the other end of the sealing plate (9), a handle (7) is installed at the outer end of the connecting ring (11), a guide plate (8) is fixedly connected inside the pipe mouth (2) above the sealing plate (9), a mounting frame (5) is fixedly connected to the outer surface of the pipe mouth (2), a second bolt (6) is threadedly connected to one end of the mounting frame (5), and a spiral groove is provided at one end of the handle (7); Disassembly and assembly mechanism: the disassembly and assembly mechanism is arranged inside the protective cover (3).

2. The manhole structure for the tailwater pipe of a generator set according to claim 1, characterized in that: The disassembly and assembly mechanism comprises a screw groove (18) arranged inside the protective cover (3), the internal thread of the screw groove (18) is connected to a first bolt (4), the interior of the protective cover (3) is fixedly connected to a guide frame (16), the inner side of the guide frame (16) is slidably connected to a spring plate (14), an elastic component is installed at the inner center of the protective cover (3), the inner side of the guide frame (16) is located above the spring plate (14) and is rotatably connected to a rotating gear (15), and one end of the spring plate (14) is fixedly connected to a mounting plate (17).

3. The manhole structure for the tailwater pipe of a generator set according to claim 2, characterized in that: The elastic component comprises a spring block (13) arranged at the center of the protective cover (3), and tooth grooves are provided on four sides of the spring block (13). The spring block (13) and the rotating gear (15) are meshingly connected.

4. The manhole structure for the tailwater pipe of a generator set according to claim 2, characterized in that: One side of the spring plate (14) is provided with tooth patterns, and the spring plate (14) and the rotating gear (15) are meshingly connected.

5. The manhole structure for the tailwater pipe of a generator set according to claim 2, characterized in that: The inner side wall of the pipe opening (2) is provided with a mounting groove, and the outer surface of the protective cover (3) is provided with an extension opening.

6. The manhole structure for the tailwater pipe of a generator set according to claim 1, characterized in that: The guide assembly comprises a guide block (10) arranged below the sealing plate (9), and the guide block (10) is slidably connected inside the polygonal groove.

7. The manhole structure for the tailwater pipe of a generator set according to claim 1, characterized in that: The driving assembly comprises a round block arranged at one end of the sealing plate (9), a circular arc groove is opened on one side of the guide plate (8), and the round block is slidably connected inside the circular arc groove.

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