CN215801470U

CN215801470U - Adjustable bit depth sand washing device

Info

Publication number: CN215801470U
Application number: CN202120568183.2U
Authority: CN
Inventors: 刘永言; 王勇
Original assignee: Chengdu Shenlan High Technology Development Co ltd
Current assignee: Sichuan Hope Hydropower Development Co Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2022-02-11
Anticipated expiration: 2031-03-19

Abstract

The utility model relates to a sand washing device with adjustable bit depth, which is used for a sand basin of a hydropower station. The device comprises a rotary pipe, a sand washing pipe, a discharge pipe, an extension pipe and the like. The method is characterized in that: through rotatory through pipe, the adjustable degree of depth position of advancing the sand mouth under water realizes that the long-pending sand in the grit chamber is driven down in order from the top and clears away. The problem of traditional sand washing pipe when the grit accumulates to a take the altitude in the pond, cause the sand washing pipe to block up, can't continue to arrange the sand is solved. The device has the characteristics of simple structure, safe and reliable use and the like, and is convenient for engineering implementation.

Description

Adjustable bit depth sand washing device

Technical Field

The utility model relates to a sand washing device, in particular to a sand washing device with adjustable bit depth for a sand basin of a hydropower station.

Background

At present, a horizontal flow type grit chamber is adopted in a general diversion type hydropower station, sand and stone in water are precipitated at the bottom of the grit chamber after the water flow speed is reduced by enlarging the overflowing section, a sand washing pipe which is horizontally arranged at the bottom of the chamber is generally adopted, and accumulated sand is carried by flowing water and discharged out of the chamber by utilizing the potential energy power of the height difference between the water level of the grit chamber and the water level of a sand outlet of a pipe extending out of the chamber. With present means and technique, the amount of sand accumulated in the pool can not be judged through instrument equipment, the sand accumulated amount is usually observed through human eyes, and a valve or a gate connected to a sand washing pipeline is opened in due time for sand washing. In order to save water consumption during sand washing, the valve should be closed in time when the sand amount is extremely small, and the valve should be opened in time when the sand amount is increased. However, sometimes the sand is dredged for management, the valve is not opened in time, or the sand content of the incoming water is increased, so that the accumulated sand is increased, the sand inlet is completely blocked, or the sand flushing pipe is blocked after the sand flushing pipe is blocked due to the increase of the sand content carried by the running water in the sand flushing pipe to a certain degree, so that the sand flushing cannot be continued, and the sand settling tank is quickly filled with the sand. This condition often occurs in real-life conditions and can only be removed by other means. If the accumulated sand cannot be removed in time, the sand content in the water entering the water diversion pipeline can be gradually increased, the excessive abrasion of the flow passage component of the hydraulic turbine set is caused, the normal operation of the generator set is influenced, and only the machine can be stopped to replace the excessively abraded equipment component in serious conditions, so that the power generation cost is increased, and the economic benefit is reduced.

Disclosure of Invention

Aiming at the problems, the device provided by the utility model can realize sand washing and ordered sand removal when the sand accumulation amount in the grit chamber is large.

In order to realize ordered sand removal, the fixed sand inlet of the traditional sand washing pipe is changed into the sand inlet with adjustable depth, so that accumulated sand in the sand setting tank can be removed from top to bottom in order.

The utility model relates to a method for realizing the adjustable position depth of a sand inlet of a device, which comprises the following steps: the sand washing holes of the rotary through pipe are respectively overlapped and aligned with the communicating holes of the sand washing pipe by rotating the rotary through pipe to different angles, and water inlet and sand inlet channels at different depth positions are formed.

Drawings

The utility model is described in further detail below with reference to the accompanying drawings:

fig. 1 is a schematic view of the structure of a spiral pipe of the device and a schematic view of 1 group of sand washing holes which are spirally distributed and are flattened along the circumference.

FIG. 2 is a structural schematic view of a sand washing pipe of the device and a schematic view of the sand washing pipe which is flattened along the circumference by 1 group of communication holes which are spirally distributed.

Fig. 3 is a typical state diagram during the practical application of the device of the present invention.

FIG. 4 is a state diagram of the device of the present invention in practical application with the sand inlet closed and without sand washing.

Detailed Description

With reference to the above figures, the specific implementation of the apparatus of the present invention is described as follows:

the spiral through pipe 1 of the device is a circular pipe in appearance, a plurality of lever holes 3 are uniformly distributed on the circumference of the pipe wall at the upper section, a bearing plate 4 which is in a shape of a whole circle or a non-whole circle is arranged below the lever holes 3 and is welded with the pipe wall of the spiral through pipe 1 in a manner of being vertical to the axis of the pipe, a plurality of sand washing holes 5 which are spirally and uniformly arranged from top to bottom in a circumferential manner are arranged at the middle-lower section, and the number of spiral turns is 0.5.

The sand washing pipe 2 of the device is a round pipe, the outer diameter of the sand washing pipe is smaller than the inner diameter of the pipe of the spiral through pipe 1, the top end of the sand washing pipe is provided with a spherical seal head 6, the middle lower section of the sand washing pipe is provided with a plurality of communicating holes 7 which are spirally and uniformly arranged from top to bottom in a circumferential manner, and the number of spiral turns is 1 circle. The lower end of the sand washing pipe 2 is respectively connected with an elbow 8, a discharge pipe 9 and an extension pipe 14. The shape, the size and the number of the communication holes 7 are the same as those of the sand washing holes 5 of the rotary through pipe 1, the depth positions of the corresponding holes are the same after the rotary through pipe 1 is sleeved into the sand washing pipe 2, and the shape of the communication holes 7 and the sand washing holes 5 can be circular, square or other shapes.

A general hydropower station grit chamber 13 is filled with accumulated sand 12 to be removed, the water level 11 is usually lower than the upper plane of the grit chamber 13, and an operation platform 10 is arranged on the upper plane of the grit chamber 13. The sand washing pipe 2 is welded with the seal head 6, the elbow 8 and the discharge pipe 9 to form, and then is pre-embedded in the grit chamber 13, the discharge pipe 9 is horizontally arranged at the bottom of the chamber along the horizontal direction of the grit chamber, the sand washing pipe 2 is vertically upward, the discharge pipe 9 is externally connected with an extension pipe 14, and a sand outlet is extended to the lower reaches of a river channel.

After the bearing plate 4 is welded on the rotary through pipe 1, the rotary through pipe is sleeved outside the sand washing pipe 2, and the bearing plate 4 and the seal head 6 form tangent point contact so as to reduce the friction resistance when the rotary through pipe 1 rotates. The top end of the screwed pipe 1 is higher than the operating platform 10, so that the screwed pipe 1 can be conveniently rotated by adopting a manual lever, or electrically driven, or driven by compressed gas.

When the accumulated sand 12 in the grit chamber 13 accumulates to a certain extent, as shown in fig. 4, the rotary through pipe 1 can be rotated to wash out the sand, as shown in fig. 3, states 1 to 6 show the overlapping state of the sand washing holes and the communication holes at different rotation angles of the rotary through pipe, and the condition that the accumulated sand in the grit chamber is removed in the corresponding state.

The specific operation method of the device comprises the following steps: according to the sand content of the water at the sand outlet, the different overlapping states of the sand washing holes and the intercommunicating holes are formed by adjusting the angles of the forward or reverse rotating rotary through pipes as shown in fig. 3, so as to adjust the proportion of the water inflow of the sand inlet and the sand inflow, thereby ensuring the reasonable collocation of the water level difference potential energy power and the on-way resistance, taking away as much sand as possible with as little water as possible, saving the water for sand washing and reducing the energy consumption.

The device has the characteristics of simple structure, safe and reliable use and the like, and is convenient for engineering implementation.

The above-mentioned embodiments are only preferred embodiments for implementing the method of the present invention, and not intended to limit the present invention in any way, and various equivalent changes or modifications may be made on the basis of the above-mentioned embodiments, and all equivalent changes or modifications within the scope of the claims, such as the same or opposite arrangement spiral directions of the sand washing holes and the communicating holes, should be included in the protection scope of the present invention.

The utility model is not limited to the desanding of the sand basin of the hydropower station, is also suitable for removing sediments in containers in other industrial fields, and can be applied to occasions such as but not limited to a water treatment sewage disposal pool, a sewage treatment sedimentation pool, a chemical impurity sedimentation pool and the like, and the application of the occasions is within the protection scope of the utility model.

Claims

1. Position-adjustable deep sand washing device, which is composed of a rotary through pipe (1), a sand washing pipe (2), a seal head (6), an elbow (8), a discharge pipe (9) and an extension pipe (14), and is characterized in that: the rotary through pipe (1) is sleeved outside the sand washing pipe (2), and the sand washing holes (5) at different depth positions can be aligned with the corresponding communication holes (7) on the sand washing pipe (2) in an overlapping manner by rotating the rotary through pipe (1) to a certain angle, so that water inlet and sand inlet channels at different depth positions are formed.

2. The adjustable deep-drawing sand device of claim 1, wherein: the appearance of the spiral through pipe (1) is a round pipe, the middle section is provided with a plurality of sand washing holes (5) which are uniformly arranged in a circumferential spiral manner from top to bottom, and the number of spiral turns is 0.5.

3. The adjustable deep-drawing sand device of claim 1, wherein: the sand washing pipe (2) is a round pipe, the top end is provided with a spherical seal head (6), the middle section is provided with a plurality of intercommunicating pores (7) which are uniformly arranged in a circumferential spiral manner from top to bottom, and the number of spiral turns is 1.

4. The adjustable deep-drawing sand device of claim 1, wherein: the lower end of the sand washing pipe (2) is respectively connected with an elbow (8), a discharge pipe (9) and an extension pipe (14).