CN214789024U

CN214789024U - Internal pressure type sealing manhole and manhole connecting pipe of high-voltage equipment

Info

Publication number: CN214789024U
Application number: CN202121133089.0U
Authority: CN
Inventors: 赵文学; 黄卢太; 霍开子; 刘波; 姜宏伟
Original assignee: Chongqing Pump Industry Co Ltd
Current assignee: Chongqing Pump Industry Co Ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-11-19
Anticipated expiration: 2031-05-25

Abstract

The utility model relates to the technical field of manholes, and discloses an internal pressure type sealing manhole and manhole connecting pipe of high-voltage equipment, which comprises a manhole upper cover, a manhole top cover and a four-way ring; a through hole is formed in the manhole upper cover; the manhole upper cover is used for being installed at the opening end of a manhole connecting pipe of high-voltage equipment; the manhole top cover is hung below the manhole upper cover through a pull rod, and a sealing ring groove is arranged on the outer peripheral surface of the manhole top cover, so that the manhole top cover can be sealed with the inner wall of the manhole connecting pipe through a sealing ring; the four-closed ring comprises four ring sheets, and the four ring sheets are formed by cutting the circular ring twice without parallel round points; the four ring pieces are respectively and locally clamped into an inner ring groove of the manhole connecting pipe so as to axially limit the manhole top cover through the bottom plane; each ring piece is provided with a threaded hole, so that the ring pieces can be radially fastened through a tension bolt extending into the threaded hole from the outer wall of the manhole connecting pipe. The utility model discloses it is sealed reliable and install and remove the easy.

Description

Internal pressure type sealing manhole and manhole connecting pipe of high-voltage equipment

Technical Field

The utility model relates to a manhole technical field especially relates to a manhole for high-voltage apparatus.

Background

In the process of rolling the metallurgical steel plate, phosphorus needs to be removed discontinuously, and an energy storage system with high-pressure water is formed by a gas tank and a water tank by utilizing the compressibility of air, so that the device has large volume and high pressure, belongs to special equipment, needs to be checked inside periodically, and is often provided with a high-pressure manhole; the diameter of the manhole of the high-pressure equipment is generally 0.4-0.5 m, people can go in and out, usually 0.45 m, and the manhole is generally a detachable structure. To reduce manhole leakage, here manhole structures often have: wood's, large bolt force-sealing, internally-pushed, etc. Referring to figure 1, the wooded manhole is manufactured with high precision and dimensional chain requirements, particularly requiring a chamfer fit to axially locate the manhole cover. Referring to fig. 2, the large bolt is forcibly sealed: the pipe connecting pipe has large outer diameter, large welding amount, more bolts, inconvenient assembly and disassembly, high tool input cost and larger leakage risk when the pressure is particularly high because a special hydraulic wrench is needed. Referring to fig. 3, the built-in type: the lid and the cushion are not easily assembled and disassembled, and the maintenance is not possible at all after the inner sealing surface is in a problem.

SUMMERY OF THE UTILITY MODEL

Not enough to above-mentioned technique, the utility model provides a sealed manhole of internal pressure formula of high-tension apparatus solves and how to provide a sealed reliable manhole of loading and unloading easily again.

In order to solve the above technical problem, the utility model provides a pair of technical scheme as follows: an internal pressure type sealing manhole of high-pressure equipment comprises a manhole upper cover, a manhole top cover and a four-way ring; the manhole upper cover is provided with a through hole; the manhole upper cover is used for being installed at the opening end of a manhole connecting pipe of high-voltage equipment; the manhole top cover is hung below the manhole upper cover through a pull rod, and a sealing ring groove is arranged on the outer peripheral surface of the manhole top cover, so that the manhole top cover can be sealed with the inner wall of the manhole connecting pipe through a sealing ring;

the four-ring comprises four ring sheets, and the four ring sheets are formed by cutting the circular ring twice without dots in parallel; the four ring pieces are respectively and locally clamped into an inner ring groove of the manhole connecting pipe to axially limit the manhole top cover through the bottom plane, so that the manhole top cover can bear the internal pressure of high-pressure equipment; each ring piece is provided with a threaded hole, so that the ring pieces can be radially fastened through a tension bolt extending into the threaded hole from the outer wall of the manhole connecting pipe.

The utility model also provides a manhole connecting pipe of the high-voltage equipment, which is used for the internal pressure type sealing manhole of the high-voltage equipment provided by the utility model; the manhole upper cover is arranged at the open end of the manhole connecting pipe through a counter bore; an inner ring groove used for clamping the four-closing ring is arranged on the inner wall of the manhole connecting pipe; the periphery of the inner ring groove is communicated with four tensioning bolt through holes coaxial with the threaded holes in the four ring pieces.

Furthermore, the bottom surface of the inner ring groove is provided with a groove, a through hole communicated with the groove and penetrating through the outer wall of the manhole connecting pipe is formed below the tension bolt through hole, and the groove and the through hole form a signal channel.

Compared with the prior art, the utility model has the advantages of include:

1. the utility model discloses a bottom plane that four closed rings carries out the axial spacingly to the manhole top cap, does not have the requirement to axial positioning size, easily processes, and more importantly has formed the internal pressure formula and has sealed (similar to built-in), and sealing reliability is higher. Four ring pieces are installed in a specific sequence, so that the axial limit of the manhole top cover can be formed, personnel do not need to enter a closed space, and the installation is very convenient. And, four close the ring and constitute by the ring piece of four components of a whole that can function independently, demolish four ring pieces through specific order so, just can relieve the axial spacing to the manhole top cap to pull out the manhole top cap through the manhole upper cover and just can accomplish the dismantlement, it is very convenient.

2. The utility model discloses a manhole adopts and to seal by the sealing washer, can reduce cost. Through the signal channel that recess and through-hole formed, can in time discover the leakage that sealing failure produced.

Drawings

Figure 1 is a schematic diagram of a wood manhole according to the prior art;

FIG. 2 is a schematic structural view of a large bolt forced sealing manhole in the prior art;

FIG. 3 is a schematic view of a prior art built-in manhole;

fig. 4 is an assembly view of an inner pressure type sealing manhole of the high pressure equipment in the present embodiment;

FIG. 5 is an enlarged partial schematic view of I of FIG. 4;

FIG. 6 is a cross-sectional view of the four rings;

FIG. 7 is a top view of the four rings;

fig. 8 is a schematic structural view of a manhole adapter.

Detailed Description

Referring to fig. 4 and 5, an internal pressure type sealing manhole of a high-pressure device comprises a manhole upper cover 1, a manhole top cover 2 and a four-way ring 3; the manhole upper cover 1 is provided with a through hole; the manhole upper cover 1 is used for being installed at the open end of a manhole connecting pipe of high-pressure equipment; the manhole top cover 2 is hung below the manhole upper cover 1 through a pull rod 4, and a sealing ring groove is arranged on the outer peripheral surface of the manhole top cover 2, so that the manhole top cover 2 can be sealed with the inner wall of the manhole connecting pipe through a sealing ring 7; the manhole top cover 2 is in clearance fit with the manhole connecting pipe 6, and the installation and the disassembly are easier.

Referring to fig. 7, the four rings 3 include four ring pieces 3-1, 3-2, 3-3 and 3-4 formed by cutting the rings twice without dots in parallel; the four ring pieces are respectively and locally clamped into an inner ring groove of the manhole connecting pipe 6 to axially limit the manhole top cover 2 through a bottom plane, so that the manhole top cover 2 can bear the internal pressure of high-pressure equipment; each ring plate is provided with a threaded hole 301, so that the ring plates can be radially fastened by a tension bolt 5 extending into the threaded hole 301 from the outer wall of the manhole adapter.

In this embodiment, the top surface of the manhole top cover 2 is provided with a boss for connecting the pull rod 4. The boss can enhance the rigidity and make the manhole top cover 2 more pressure-resistant.

In this embodiment, referring to fig. 6, an annular protrusion 302 is disposed on a top surface of the four-ring 3, and the annular protrusion 302 is used for radially positioning the four-ring 3 that is partially clamped into the inner annular groove.

Referring to fig. 8, a manhole connection pipe of a high-voltage device is used for an internal pressure type sealing manhole of the high-voltage device of the present invention; the manhole upper cover 1 is installed at the open end of the manhole connecting pipe through a counter bore 602; an inner ring groove 603 for clamping the four-loop 3 is arranged on the inner wall of the manhole connecting pipe; the periphery of the inner ring groove is communicated with four tensioning bolt through holes 604 which are coaxial with the threaded holes on the four ring pieces.

In this embodiment, referring to fig. 4, a groove is formed in the bottom surface of the inner circular groove, a through hole 601 which is communicated with the groove and penetrates through the outer wall of the manhole adapter is formed below the tension bolt via hole 604, and the groove and the through hole 601 form a signal channel. Through the signal channel that recess and through-hole formed, can in time discover the leakage that sealing failure produced.

In this embodiment, referring to fig. 5, the portion of the inner wall of the manhole pipe, which is used for sealing with the side wall of the manhole top cover 2, is a stainless steel overlaying layer 605, so that the service life is prolonged.

The utility model discloses a manhole mounting method as follows: firstly, hoisting a manhole top cover 2 provided with a sealing ring into a manhole connecting pipe 6 through a lifting bolt on the manhole top cover (a lifting bolt connecting hole is arranged on the manhole top cover), feeding an annular sheet 3-1 and an annular sheet 3-3 of a four-ring 3 from the opening end of the manhole connecting pipe, clamping the annular sheets into an inner annular groove of the manhole connecting pipe, and fixing the annular sheets through a tensioning bolt 5. And thirdly, feeding the ring sheets 3-2 and 3-4 of the four-closed ring 3 into the opening end of the manhole connecting pipe, clamping the ring sheets into an inner ring groove of the manhole connecting pipe, and fixing the ring sheets by a tension bolt 5, thereby completing the axial limit of the manhole top cover 2. The ring piece 3-2 and the ring piece 3-4 are not in movement interference with the ring piece 3-1 and the ring piece 3-3, so that the ring piece 3-1 and the ring piece 3-3 can be clamped into the front side and the rear side of the inner ring groove respectively after being clamped into the front side and the rear side of the inner ring groove. And fourthly, installing the manhole upper cover 1 into the counter bore 602 at the opening end of the manhole connecting pipe, supporting the manhole upper cover 1 at the opening end of the manhole connector, and connecting the manhole top cover through the pull rod 4 (bolt), thereby suspending the manhole top cover 2.

The utility model discloses a manhole dismantlement method as follows: the ring sheets 3-2 and 3-4 are firstly removed, then the ring sheets 3-1 and 3-3 are removed, and the axial limit of the manhole top cover 2 is removed. The manhole cover 1 is pulled from the outside, thereby pulling the manhole top cover 2 out of the manhole pipe.

Claims

1. The utility model provides a sealed manhole of interior pressure formula of high-pressure equipment which characterized in that: comprises a manhole upper cover, a manhole top cover and a four-way ring; the manhole upper cover is provided with a through hole; the manhole upper cover is used for being installed at the opening end of a manhole connecting pipe of high-voltage equipment; the manhole top cover is hung below the manhole upper cover through a pull rod, and a sealing ring groove is arranged on the outer peripheral surface of the manhole top cover, so that the manhole top cover can be sealed with the inner wall of the manhole connecting pipe through a sealing ring;

2. The internal pressure type sealing manhole of high pressure equipment as claimed in claim 1, wherein: the four-closed-loop top surface is provided with an annular bulge, and the annular bulge is used for radially positioning the four-closed loop which is partially clamped in the inner annular groove.

3. The internal pressure type sealing manhole of high pressure equipment as claimed in claim 1, wherein: the top surface of the manhole top cover is provided with a boss for connecting the pull rod.

4. A manhole connecting pipe of high-pressure equipment is characterized in that: an internal pressure type sealing manhole for installing the high voltage equipment as claimed in claim 1; the manhole upper cover is arranged at the open end of the manhole connecting pipe through a counter bore; an inner ring groove used for clamping the four-closing ring is arranged on the inner wall of the manhole connecting pipe; the periphery of the inner ring groove is communicated with four tensioning bolt through holes coaxial with the threaded holes in the four ring pieces.

5. Manhole connection pipe of a high-voltage apparatus according to claim 4, wherein: the bottom surface of the inner ring groove is provided with a groove, a through hole which is communicated with the groove and penetrates through the outer wall of the manhole connecting pipe is formed below the through hole of the tension bolt, and the groove and the through hole form a signal channel.

6. Manhole connection pipe of a high-voltage apparatus according to claim 4, wherein: the part of the inner wall of the manhole connecting pipe, which is used for sealing with the side wall of the manhole top cover, is a stainless steel overlaying layer.