CN209975621U

CN209975621U - Open caisson formula water hammer protective equipment

Info

Publication number: CN209975621U
Application number: CN201920412165.8U
Authority: CN
Inventors: 储善鹏; 何伟; 张永进; 张柏成; 沈晓雁; 周磊; 华悦; 张瑞; 王鑫
Original assignee: Zhejiang Design Institute of Water Conservancy and Hydroelectric Power
Current assignee: Zhejiang Water Resources And Hydropower Survey And Design Institute Co ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-01-21
Anticipated expiration: 2029-03-29

Abstract

The utility model discloses a sunk well formula water hammer protective device, including sunk well, partition wall, manhole, steel cat ladder, the type of falling U steel pipe, branch pipe, rupture disk, air valve, simple and easy house. The interior of the open caisson is divided into two parts by a partition wall, an inverted U-shaped steel pipe is arranged on one side of the partition wall, and a water pool is arranged on the other side of the partition wall. A branch pipe is installed at the top of the inverted U-shaped steel pipe, an air valve is installed above the branch pipe, and a rupture disk is installed at the pipe orifice of the branch pipe. When the pressure is too high due to the positive water hammer pressure in the pipeline, the rupture disk is exploded, the discharge flow is reduced, the pressure in the pipeline is reduced, and the safe operation of a water supply system is ensured. The air valve is used for air intake and exhaust when negative water hammer pressure occurs in the water supply pipeline and air enters the branch pipe due to the replacement of the rupture disk. The utility model discloses when not influencing the original function of open caisson, can play the effect of the positive and negative water hammer pressure of protection, and the land acquisition area is little, and the investment is economized, and the cost is low, easy installation.

Description

Open caisson formula water hammer protective equipment

Technical Field

The utility model relates to a city long distance water supply engineering technical field, concretely relates to open caisson formula water hammer protective equipment.

Background

In urban long-distance water supply engineering, a construction technology of laying pipelines without grooves is generally adopted due to the reasons of dense ground construction, difficult land acquisition, high cost and the like. The common application is push pipe technology. A pipe jacking technology is adopted, before a pipeline is laid, a working well is built at the beginning end of the pipeline, a receiving well is built at the tail end of the pipeline, and a pipe jacking machine is used for enabling a steel pipe to penetrate through a hole reserved in the working well to penetrate through the top of an earth layer to the receiving well. The pipe jacking working well and the receiving well are generally manufactured by a sinking well construction method.

In long distance water supply works, the water hammer pressure is large due to the long length of the pipeline. Common water hammer protection facilities include surge towers and unidirectional towers. The surge tower has the advantages that water supplementing measures are not needed to be additionally arranged, water enters in two directions, the water level is automatically adjusted, the protection effect can be achieved on positive and negative water hammer pressure, the water level is controlled by the pressure of the water head at the point, when the water level of the surge tower is high, the elevation of the surge tower is high or special overflow facilities need to be built, and the investment is large.

The one-way tower has the advantages that the water level in the tower can be manually set, water flow can only flow to a pipeline from the inside of the tower, the elevation is generally low and controllable, and the construction cost is lower than that of a pressure regulating tower. The water level in the tower can only be reduced, and self-adjustment cannot be realized, so that timely water supplement is needed to avoid bottom emptying, and the operation and maintenance are complex.

In addition, the surge tower and the one-way tower have a common disadvantage that a large land acquisition area is needed, urban land resources are short, and social problems caused by land acquisition are not rare.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sunk well formula water hammer protective equipment, when not influencing the current function of sunk well, improve current structure, increase water hammer safeguard function, and it is little to collect on land the area.

The technical scheme of the utility model is that: a sunk well type water hammer protection facility comprises a sunk well, a partition wall, a manhole, a steel ladder stand, an inverted U-shaped steel pipe, a branch pipe, a rupture disk, an air valve and a simple house; the internal space of the open caisson is divided into two parts by a partition wall, an inverted U-shaped steel pipe is installed on one side of the partition wall, and a water pool is arranged on the other side of the partition wall.

And two ends of the inverted U-shaped steel pipe are connected with the jacking pipes or the buried steel pipes on two sides. A branch pipe is installed at the top of the inverted U-shaped steel pipe, and an air valve is installed above the branch pipe. The branch pipe penetrates through the partition wall, and a rupture disk can be installed on the pipe orifice of the branch pipe through a flange.

And a steel ladder stand and a platform are arranged on the lateral side of the rupture disk by virtue of the partition wall, and a manhole is reserved above the steel ladder stand.

The air valve is exposed out of the ground, and a simple house is built at the upper part of the air valve.

When the pressure is too high due to the positive water hammer pressure in the water supply pipeline, the rupture disk arranged at the horizontal port of the branch pipe is exploded, the discharge flow is reduced, the pressure in the pipeline is reduced, and the safe operation of a water supply system is ensured. When negative water hammer pressure occurs in the water supply pipeline and air enters the branch pipe due to the replacement of the rupture disk, an air valve arranged above the branch pipe is used for air intake and exhaust. The utility model discloses when not influencing the original function of open caisson, can play the effect of the positive and negative water hammer pressure of protection.

The utility model has the advantages that: the open caisson has the advantages that the function of the pipe-jacking open caisson is not influenced, the open caisson is added with the water hammer protection function by improving the types of the steel pipes and the open caisson, and compared with a pressure regulating tower and a one-way tower, the open caisson has the advantages of greatly reduced land acquisition area, less investment, low manufacturing cost and easy installation.

Drawings

Fig. 1 is a plan view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of the present invention;

FIG. 3 is a cross-sectional view taken along line B-B of the present invention;

fig. 4 is a detailed view of the rupture disk of the present invention.

In the figure: 1-open caisson; 2-partition wall; 3-a water pool; 4-an inverted U-shaped steel pipe; 5-branch pipe; 6-an air valve; 7-rupture disk; 8-steel ladder climbing; 9-simple house; 10-a platform; 11-a flange; 12-manhole.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 to 4, the utility model discloses an inner space of open caisson 1 is divided into two by partition wall 2, one side then is pond 3, the opposite side is installed and is fallen U shaped steel pipe 4, the pipe-jacking or the buried steel pipe of water supply system is connected at the both ends of falling U shaped steel pipe 4, branch pipe 5 is installed at the top of falling U shaped steel pipe 4, the mouth of pipe of branch pipe 5 passes through flange 11 and installs rupture disk 7, air valve 6 is installed to the top of branch pipe 5, air valve 6 exceeds ground, simple and easy house 9 has been built on upper portion, be convenient for maintain.

When positive water hammer pressure occurs due to operations such as valve closing in a water supply pipeline, the pressure at the inverted U-shaped steel pipe 4 is suddenly increased, and a part of positive water hammer pressure can be offset due to the fact that the structural type of the inverted U-shaped steel pipe 4 has large hydraulic loss, and if the pressure in the pipeline is still too large and exceeds the setting value of the rupture disk 7 at the moment, the rupture disk 7 is ruptured, the flow is discharged, the pressure in the pipeline is reduced, and the safe operation of a water supply system is guaranteed. It should be noted that the setting of the rupture disc 7 must be lower than the design value for the water supply line pressure. Once the rupture disk 7 is exploded, the discharged flow enters the water pool 3, and in order to ensure that the water pool 3 has sufficient capacity, a submersible pump needs to be arranged to pump water in the water pool 3. On the side of rupture disk 7, rely on partition wall 2 to install steel cat ladder 8 and platform 10, reserve manhole 12 in steel cat ladder 8 top department, operating personnel can follow manhole 12 and get into so that change and inspect rupture disk 7.

The air valve 6 is used for air intake and exhaust when a negative water hammer pressure occurs in the water supply pipeline due to an operation of opening a valve or the like and air enters the branch pipe 5 due to a gap in which the rupture disk 7 is replaced.

The above embodiments are described in connection with the accompanying drawings, but it should not be understood that the invention is limited thereto, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a well sinking formula water hammer protective device which characterized in that: the device comprises an open caisson, a partition wall, an manhole, a steel ladder, an inverted U-shaped steel pipe, a branch pipe, a rupture disk and an air valve; the inner space of the open caisson is divided into two parts by a partition wall, an inverted U-shaped steel pipe is arranged on one side of the partition wall, and a water pool is arranged on the other side of the partition wall; the top of the inverted U-shaped steel pipe is provided with a branch pipe, and two ends of the inverted U-shaped steel pipe are connected with a top pipe or a buried steel pipe of a water supply system; the branch pipe passes through the partition wall, and the rupture disk is installed to the mouth of pipe of branch pipe, and the air valve is installed to the top of branch pipe.

2. The open caisson-type water hammer protection installation according to claim 1, wherein: the side of rupture disk, rely on the partition wall to be equipped with steel cat ladder and platform, reserve above the steel cat ladder and have into the manhole.

3. The open caisson-type water hammer protection installation according to claim 1, wherein: the air valve is exposed out of the ground, and a simple house is built at the upper part of the air valve.

4. The open caisson-type water hammer protection installation according to claim 1, wherein: and the pipe orifice of the branch pipe is provided with a rupture disk through a flange.