Drain hole plugging mechanism of water turbine supporting cover

Abstract

The utility model provides a drainage hole plugging mechanism of a water turbine support cover, which comprises a drainage port fixed on the water turbine support cover, one end of the drainage port is fixedly connected with a support ring, one side of the support ring deviating from the drainage port is provided with a plugging cover, and one side of the plugging cover facing the support ring is annularly provided with a plurality of through holes at equal intervals. A ring used for limiting the head position of the bolt is arranged on the side, away from the supporting ring, of the penetrating hole, two supporting plates are symmetrically fixed to the outer surface of the ring, positioning rods are installed on the faces, facing the plugging cover, of the supporting plates and connected with the plugging cover in an inserted mode, and the bolt is inserted into a channel formed by the ring and the penetrating hole. And connecting pieces matched with the bolts are annularly and equidistantly arranged on one surface, deviating from the plugging cover, of the supporting ring. The bolt dismounting device has the following beneficial effect that a standby mode is provided for dismounting the bolts.

Description

Technical Field

[0001] The utility model relates to a drainage hole blocking mechanism of a water turbine support cover, belonging to the technical field of water turbines. Background Art

[0002] The support cover is a component of the water guide mechanism of the turbine and is also a part of the flow channel. For the convenience of maintenance, it is necessary to set a drainage hole on the support cover to drain water during maintenance and block the drainage hole during normal use of the turbine. At present, a blocking cover is installed on the drain port on the support cover, and the blocking cover is connected and fixed to the support ring on the drain port by a plurality of bolts and nuts. The fasteners formed by the bolts and nuts are easily affected by moisture and rust during use. At the same time, after the bolts and nuts are assembled, there is no gap between the bolt head and the blocking cover and between the nut and the support ring, which increases the difficulty of disassembling the rusted bolts and nuts that are difficult to separate. Therefore, it is necessary to design a drainage hole blocking mechanism for the turbine support cover that provides a backup method for disassembling the bolts. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a drainage hole blocking mechanism for a turbine support cover to solve the problems raised in the above-mentioned background technology. The utility model provides an alternative method for disassembling bolts.

[0004] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a drainage hole blocking mechanism of a turbine support cover, comprising a drainage port for being fixed on the turbine support cover, one end of the drainage port is connected and fixed with a support ring, a blocking cover is provided on the side of the support ring away from the drainage port, a plurality of through holes are equidistantly arranged in an annular shape on a side of the blocking cover facing the support ring, a ring for limiting the position of a bolt head is provided on the side of the through hole away from the support ring, two support plates are symmetrically fixed on the outer surface of the ring, a positioning rod is installed on the side of the support plate facing the blocking cover, the positioning rod is plugged into the blocking cover, bolts are inserted in the channel formed by the ring and the through hole, and a connecting piece matching the bolts is equidistantly installed in an annular shape on the side of the support ring away from the blocking cover.

[0005] Furthermore, the connecting member includes a boss, and a plurality of bosses are evenly fixed on a side of the support ring facing away from the sealing cover, and a plurality of small holes aligned with the through holes are equidistantly formed in a ring shape on a side of the support ring facing the sealing cover, and a positioning groove is formed on a side of the boss facing away from the small hole, and the positioning groove is communicated with the small hole, a positioning block is inserted in the positioning groove, and a screw hole is formed on a side of the positioning block facing the small hole, and the bolt passes through the ring, the through hole and the small hole and is threadedly connected in the screw hole.

[0006] Furthermore, the cross section of the positioning groove is rectangular, and the cross section of the positioning block is rectangular.

[0007] Furthermore, the position where the blocking cover contacts the positioning rod is recessed to form a positioning hole, and one end of the positioning rod away from the support plate is inserted into the positioning hole.

[0008] Furthermore, a blind hole is provided at the position where the support plate is installed with the positioning rod, one end of the positioning rod is fixed in the blind hole, and the support plate and the ring are an integrally formed structure.

[0009] Furthermore, a side of the sealing cover facing the drain outlet is recessed to form a sealing groove, a sealing ring is provided in the sealing groove, and the sealing ring fits the drain outlet.

[0010] Beneficial effects of the utility model:

[0011] 1. When connecting the plugging cover and the support ring with bolts, the bolts are passed through the ring and the through hole and then screwed into the screw hole to complete the assembly of the plugging cover and the support ring. At this time, the plugging cover realizes the blocking of the drain outlet. Under the support of the positioning rod, there is a gap between the ring and the plugging plate, that is, there is also a gap between the head of the bolt and the plugging cover. When the bolt cannot be disassembled normally with tools due to rust, the gap between the ring and the plugging cover can be used to cut off the bolt rod, providing an alternative method for disassembling the bolt.

[0012] 2. When installing the bolts, insert the positioning block with screw holes into the positioning groove on the boss, complete the connection between the positioning block and the support ring, and after cutting off the bolts, remove the part of the bolt remaining in the screw hole and the positioning block from the positioning groove together to avoid the bolts remaining in the screw hole affecting subsequent assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 This is a structural schematic diagram of a drainage hole blocking mechanism of a turbine support cover of the utility model;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 It is a schematic diagram of the assembly of a support ring and a drain port in a drain hole blocking mechanism of a turbine support cover according to the utility model;

[0017] Figure 4 This is a diagram of a boss, a support ring and a drain hole in a drain hole blocking mechanism of a turbine support cover of the utility model;

[0018] Figure 5It is a schematic diagram of the assembly of a sealing ring and a blocking cover in a drainage hole blocking mechanism of a turbine support cover according to the utility model;

[0019] Figure 6 It is a three-dimensional diagram of a blocking cover in a drainage hole blocking mechanism of a turbine support cover of the utility model;

[0020] Figure 7 It is a three-dimensional view from another perspective of a blocking cover in a drainage hole blocking mechanism of a turbine support cover of the utility model;

[0021] Figure 8 It is a three-dimensional diagram of a positioning block in a drainage hole blocking mechanism of a turbine support cover of the utility model;

[0022] Fig. 9 It is a schematic diagram of the assembly of a positioning rod, a support plate and a ring in a drainage hole blocking mechanism of a turbine support cover of the utility model;

[0023] In the figure: 1-drain outlet, 2-support ring, 3-boss, 4-sealing cover, 5-bolt, 6-support plate, 7-ring, 8-positioning block, 9-positioning rod, 10-small hole, 11-positioning groove, 12-sealing ring, 13-perforation, 14-sealing groove, 15-positioning hole, 16-screw hole. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] See also Figure 1 , Figure 5 and Figure 6 The utility model provides a technical solution: a drainage hole blocking mechanism of a turbine support cover, comprising a drainage port 1 fixed on the turbine support cover, one end of the drainage port 1 is connected and fixed with a support ring 2, a blocking cover 4 is provided on the side of the support ring 2 facing away from the drainage port 1, a sealing groove 14 is formed on the side of the blocking cover 4 facing the drainage port 1, a sealing ring 12 is provided in the sealing groove 14, and the sealing ring 12 is fitted with the drainage port 1. By installing the sealing ring 12 between the drainage port 1 and the blocking cover 4, the sealing performance between the blocking cover 4 and the drainage port 1 is improved.

[0026] See also Figure 1 , Figure 2 , Figure 7 and Fig. 9A plurality of through holes 13 are equidistantly provided in an annular shape on one side of the blocking cover 4 facing the support ring 2, and a ring 7 for limiting the position of the head of the bolt 5 is provided on the side of the through hole 13 facing away from the support ring 2. Two support plates 6 are symmetrically fixed to the outer surface of the ring 7, wherein the support plate 6 and the ring 7 are an integrally formed structure, and a positioning rod 9 is installed on the side of the support plate 6 facing the blocking cover 4, that is, a blind hole is provided at the position where the positioning rod 9 is installed on the support plate 6, so that one end of the positioning rod 9 is fixed in the blind hole, thereby improving the connection stability between the positioning rod 9 and the support plate 6, and a positioning hole 15 is formed at the position where the blocking cover 4 contacts the positioning rod 9, so that the end of the positioning rod 9 away from the support plate 6 is inserted in the positioning hole 15, thereby realizing the insertion of the positioning rod 9 and the blocking cover 4.

[0027] See also Figure 1-Figure 9 A bolt 5 is inserted in the channel formed by the ring 7 and the through hole 13. When the bolt 5 is used to connect the blocking cover 4 and the support ring 2, the bolt 5 is passed through the ring 7 and the through hole 13 and then screwed into the screw hole 16 to complete the assembly of the blocking cover 4 and the support ring 2. At this time, the blocking cover 4 realizes the blocking of the drain outlet 1. Under the support of the positioning rod 9, there is a gap between the ring 7 and the blocking plate, that is, there is also a gap between the head of the bolt 5 and the blocking cover 4. When the bolt 5 cannot be removed normally by tools due to rust, the gap between the ring 7 and the blocking cover 4 can be used to cut off the rod of the bolt 5, thereby providing a backup method for removing the bolt 5.

[0028] See also Figure 1-Figure 9 A plurality of bosses 3 are evenly fixed on the side of the support ring 2 facing away from the blocking cover 4, and a plurality of small holes 10 aligned with the through holes 13 are equidistantly arranged in a ring shape on the side of the support ring 2 facing the blocking cover 4. A positioning groove 11 with a rectangular cross section is arranged on the side of the boss 3 facing away from the small hole 10, and the positioning groove 11 is communicated with the small hole 10. A positioning block 8 with a rectangular cross section is inserted in the positioning groove 11, and a screw hole 16 is arranged on the side of the positioning block 8 facing the small hole 10. The bolt 5 passes through the ring 7, the through hole 13 and the small hole 10 and is threadedly connected in the screw hole 16. When installing the bolt 5, the positioning block 8 with the screw hole 16 is inserted into the positioning groove 11 on the boss 3 to complete the connection between the positioning block 8 and the support ring 2. After cutting off the bolt 5, the part of the bolt 5 remaining in the screw hole 16 can be taken out from the positioning groove 11 together with the positioning block 8, so as to avoid the bolt 5 remaining in the screw hole 16 affecting the subsequent assembly.

[0029] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A drainage hole blocking mechanism for a turbine support cover, comprising a drainage port (1) for fixing on the turbine support cover, characterized in that: A support ring (2) is connected and fixed to one end of the drain outlet (1); a sealing cover (4) is provided on the side of the support ring (2) facing away from the drain outlet (1); a plurality of through holes (13) are equidistantly provided in an annular shape on a side of the sealing cover (4) facing the support ring (2); a ring (7) for limiting the position of the head of a bolt (5) is provided on the side of the through hole (13) facing away from the support ring (2); two support plates (6) are symmetrically fixed to the outer surface of the ring (7); a positioning rod (9) is installed on the side of the support plate (6) facing the sealing cover (4); the positioning rod (9) is plugged into the sealing cover (4); a bolt (5) is inserted into a channel formed by the ring (7) and the through hole (13); and a connecting piece matching the bolt (5) is equidistantly provided in an annular shape on the side of the support ring (2) facing away from the sealing cover (4).

2. The drainage hole blocking mechanism of a turbine support cover according to claim 1, characterized in that: The connecting member comprises a boss (3), a plurality of bosses (3) are evenly fixed on a side of the support ring (2) facing away from the blocking cover (4), a plurality of small holes (10) aligned with the through holes (13) are equidistantly formed in an annular shape on a side of the support ring (2) facing the blocking cover (4), a positioning groove (11) is formed on a side of the boss (3) facing away from the small hole (10), the positioning groove (11) is communicated with the small hole (10), a positioning block (8) is inserted in the positioning groove (11), a screw hole (16) is formed on a side of the positioning block (8) facing the small hole (10), and the bolt (5) passes through the ring (7), the through hole (13) and the small hole (10) and is threadedly connected in the screw hole (16).

3. The drainage hole blocking mechanism of a turbine support cover according to claim 2, characterized in that: The cross section of the positioning groove (11) is rectangular, and the cross section of the positioning block (8) is rectangular.

4. The drainage hole blocking mechanism of a turbine support cover according to claim 1, characterized in that: The position where the blocking cover (4) contacts the positioning rod (9) is recessed to form a positioning hole (15), and one end of the positioning rod (9) away from the support plate (6) is inserted into the positioning hole (15).

5. The drainage hole blocking mechanism of a turbine support cover according to claim 4, characterized in that: A blind hole is provided at the position where the support plate (6) is mounted on the positioning rod (9), one end of the positioning rod (9) is fixed in the blind hole, and the support plate (6) and the ring (7) are an integrally formed structure.

6. The drainage hole blocking mechanism of a turbine support cover according to claim 1, characterized in that: A side of the blocking cover (4) facing the drain outlet (1) is recessed to form a sealing groove (14), a sealing ring (12) is provided in the sealing groove (14), and the sealing ring (12) fits the drain outlet (1).

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