CN221072456U - Self-overflow relief well inverted suspension type anti-backflow silt blocking device - Google Patents

Abstract

The utility model provides a from overflow relief well fall suspension type anti-backflow silt blocking device, including the relief well pipe, locate the bottom spacing collar in the relief well pipe, the top gag lever post, and be located the circular cone type fall suspension between bottom spacing collar and the top gag lever post, the relief well horizontal overflow mouth has been seted up on the lateral wall that the relief well pipe is located between bottom spacing collar and the top gag lever post, circular cone type fall suspension includes upper portion cylinder and lower cone, the lower cone of no water or water level is low in the relief well pipe falls on bottom spacing collar by the dead weight, upper portion cylinder is sealed with the relief well horizontal overflow mouth, lower cone breaks away from bottom spacing collar drive upper portion cylinder upward movement when the relief well pipe water level rises and opens the drainage with the relief well horizontal overflow mouth. The utility model has simple installation and no need of maintenance, the conical inverted suspension can realize the floating in the rising process of the water of the pressure reducing well, realize the opening of the pressure reducing well head, the self-overflow drainage and the pressure reduction, and prevent the rainwater muddy water from flowing backwards to block the pressure reducing well inverted filter layer by falling down the closed well pipe by the dead weight when no water exists in the well.

Description

Self-overflow relief well inverted suspension type anti-backflow silt blocking device

Technical Field

The utility model relates to the technical field of water conservancy and geotechnical engineering products, in particular to a self-overflow relief well inverted suspension type anti-backflow silt blocking device.

Background

The self-overflow relief well is one of the most effective methods for eliminating the harm of the pressure-bearing water in projects such as embankments, canal slopes, dam foundations and the like, and is also a measure for seepage control of water conservancy and geotechnical engineering, when the pressure of the water in the stratum forms the pressure-bearing water, the underground water automatically overflows from the relief well, and the pressure is reduced by automatic drainage. If on the first-level horse road slope of the excavation canal section of the south-to-north central line engineering, a large number of self-overflow relief wells are arranged on part of the canal section in order to eliminate the influence of high groundwater in the soil body of the canal slope on the safety of the canal slope and lining plates; in the embankment engineering, the dyke base section with a binary structure is used for eliminating the piping dangerous situation hidden trouble, and the self-overflow relief well is one of the most common engineering measures for eliminating the embankment piping hidden trouble. Although the relief well can automatically overflow and decompress, the relief well has intermittent operation characteristics, and according to the past research results, biological, chemical and mechanical clogging easily occurs to a relief well reverse filtering layer in the operation process, wherein the most common mechanical clogging is caused by rainwater backflow clogging. Once the self-overflow relief well reverse filtering layer is blocked, the drainage relief well function is greatly reduced, so that dangerous situations such as piping, seepage damage or slope instability can be generated in the stratum where the relief well is located. How to effectively solve the problem of the blockage in the service period of the relief well is always one of the difficulties in the engineering world.

A method for slowing down clogging of a relief well by a filter element structure in the prior art mainly comprises a conventional relief well, a plastic filter element and the like, water flows are transmitted from the filter element of the relief well and then flow out from an inner well pipe, clogging substances are accumulated in the filter element, once the filter element is clogged, the clogging is delayed by adopting a mode of cleaning and replacing the filter element, and therefore the service life of the relief well is prolonged. The main disadvantages of this approach are: because the conventional relief well is additionally provided with the filter element to realize that part of the silt is blocked and transferred to the filter element, and the problem of part of the silt is solved by cleaning or replacing the filter element, the relief well is required to be in an extra filter element form, a well pipe structure is increased, the manufacturing cost is high, the silt state of the filter element is required to be continuously checked in the service period, and the operation and maintenance difficulty is high.

The other method in the prior art is that the floating ball is used as a structure for preventing the water outlet pipe from flowing backwards, the main working principle is that the floating ball floats when the water pressure inside the water pipe is larger than the water pressure outside the well pipe, the water outlet pipe is discharged, and the floating ball and the water pipe form a seal when the external water pressure is larger than the water pressure inside the water pipe, so that the water outlet pipe is sensitive. There are some disadvantages: the structure forms sealed water stop through the water pipe reducing and the floating ball, a large gap is usually formed between the outlet of the water pipe after reducing and the floating ball, foreign matters or aquatic organisms adhere to the floating ball in the service period, so that the floating ball cannot seal the water pipe, the water cannot be stopped, most lining plates of the current south-to-north central line excavation channel are raised and damaged, most of the reasons are that the unidirectional water stop structure arranged in the channel of the type fails, normal drainage and decompression cannot be caused, namely the floating ball cannot be closed or floating ball floats out and cannot be reset.

In addition, the flap valve type water stop anti-backflow and anti-clogging method is quite common, the principle of the method is similar to that of a floating ball water stop structure, the sealing water stop is mainly formed by the difference of internal and external water pressures, and when the water pressure on one side is larger than that on the other side, the flap valve is opened or closed. The main disadvantage of the flap valve type water-stopping backflow preventing structure is that the flap valve is easy to be blocked by sundries or aquatic organisms in water to lose flexibility, especially when the flap valve connecting pin is worn and damaged or the edge is blocked, the flap valve is directly caused to be inflexible or incapable of being closed, so that the water yield or the water-stopping effect is influenced; the flap valve structure of the pump station water outlet in hydraulic engineering basically has the problem of flap valve failure in long-term operation, and the engineering safety is seriously influenced.

The floating ball and flap valve type anti-backflow structure is usually used for realizing unidirectional drainage in function, and has certain anti-clogging function when a water pipe connected with the water stopping structure possibly has a reverse filtering layer. In summary, the existing anti-backflow and anti-blocking device mainly has the following problems:

1. the filter element structure slows down the clogging method of the relief well, increases the well pipe structure, has high manufacturing cost, needs to continuously check the clogging state of the filter element in the service period, and has higher operation and maintenance difficulty.

2. The conventional floating ball type water stopping structure is easy to cause the failure of the floating ball water stopping or the difficult resetting of the ball body, and seriously affects the water stopping effect.

3. The flap valve type water stop structure is easy to cause abrasion of the connecting pin or blockage of the edge by sundries, is difficult to stop water or influence water yield, and influences normal operation of engineering.

Disclosure of utility model

The utility model provides a self-overflow relief well inverted suspension type anti-backflow silt blocking device, which solves the defect of the existing common anti-backflow silt blocking problem of the relief well, has small equipment and simple and convenient installation, is opened by self-overflow pressure of the relief well, and can be opened to corresponding height along with a certain variation range of the water level in a self-overflow relief well pipe by cone-shaped inverted suspension, so that smooth drainage of a relief well water outlet is realized; when the groundwater level is lowered, namely the water level in the relief well is lowered, the inverted overhang is lowered to a limit point by dead weight, the upper end of the relief well pipe is closed, the water outlet of the relief well is closed, and the requirement of the relief well on anti-backflow and anti-clogging is met. The utility model skillfully utilizes the relationship between the inverted overhang dead weight and the water pressure to realize the aim of simultaneously closing the pressure reducing well pipe and the horizontal water outlet of the pressure reducing well, and is also provided for the first time for solving the special operation and maintenance environments that the pressure reducing well such as embankment, canal slope engineering and the like has the reverse flow siltation failure and is difficult to maintain, thus filling the domestic and foreign blanks.

The utility model provides a self-overflow relief well is down to hang type and is prevented flowing backward silting up device, includes the relief well pipe, locates bottom spacing collar, the top gag lever post in the relief well pipe and is located the circular cone type of falling between bottom spacing collar and the top gag lever post and hang, the relief well horizontal overflow mouth has been seted up on the lateral wall that the relief well pipe is located between bottom spacing collar and the top gag lever post, circular cone type of falling includes upper portion cylinder and lower cone, the lower cone falls on bottom spacing collar by the dead weight in the relief well pipe, upper portion cylinder is sealed with the relief well horizontal overflow mouth, lower cone breaks away from bottom spacing collar and drives upper portion cylinder upward movement when the relief well pipe water level rises, upper portion cylinder opens the drainage with the relief well horizontal overflow mouth.

Further, the bottom limit ring and the top limit rod are connected with the inner wall of the decompression well pipe.

Furthermore, two cone limiting pins are arranged on two sides of the conical inverted overhang, and the cone limiting pins are slidably arranged in limiting groove guide rails on the side wall of the pressure reducing well pipe.

Furthermore, the conical inverted suspension is made of light plastic materials.

Further, the horizontal overflow port of the relief well is vertically connected with the relief well pipe.

Compared with the prior art, the utility model has obvious advantages, because the structure is simple and small, the installation is simple and convenient, the conical inverted suspension can flexibly and stably move in a limited range, when no water exists in a pressure reducing well pipe or the water level is low, the conical inverted suspension falls on the bottom limit ring to form a seal for the well pipe and a horizontal overflow port, when the pressure reducing well overflows, the inverted suspension is self-started by water pressure, all the structures do not need additional power or special maintenance, and the device can prevent the filter layer of the self-overflow pressure reducing well from being blocked due to backflow.

Drawings

FIG. 1 is a schematic diagram of the construction of the self-overflow relief well inverted overhang anti-reverse-flow plugging device of the present utility model;

FIG. 2 is a schematic view of the structure of the utility model when the conical inverted suspension rises to block the horizontal overflow port of the relief well;

Fig. 3 is a top view of the present utility model.

In the figure: 1-conical inverted overhang; 2-a bottom limit ring; 3-limit groove guide rails; 4-cone limiting pins; 5-a top stop lever; 6-a pressure reducing well pipe; 7-a horizontal overflow port of the relief well; 8-wellhead sealing plate.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1-3, an embodiment of the present utility model provides a self-overflow relief well inverted suspension type anti-backflow silt blocking device, which comprises a conical inverted suspension 1, wherein the self-gravity falls on a bottom limit ring 2, the bottom limit ring 2 is connected with a relief well pipe 6, two side wings of the conical inverted suspension 1 are provided with two cone limit pins 4, the cone limit pins 4 are arranged in a limit groove guide rail 3, and a top limit rod 5 is connected with the relief well pipe 6 for limiting the floating height of the conical inverted suspension 1; the horizontal overflow port 7 of the relief well is vertically connected with the relief well pipe 6, and a wellhead sealing plate 8 is arranged at the top of the relief well pipe 6.

The conical inverted suspension 1 is a core component of the device, a hollow structure is made of light plastic, the conical inverted suspension 1 comprises an upper cylinder and a lower cone, the lower cone falls on the bottom limit ring 2 by self weight when no water or water level in the pressure reducing well pipe 6 is low, the upper cylinder seals the horizontal overflow port 7 of the pressure reducing well, the lower cone breaks away from the bottom limit ring 2 to drive the upper cylinder to move upwards when the water level of the pressure reducing well pipe 6 rises, and the upper cylinder opens the horizontal overflow port 7 of the pressure reducing well to drain water.

The bottom limit ring 2 and the top limit rod 5 have the function of limiting the vertical movement interval of the conical inverted suspension 1 on the well pipe.

The cone-shaped inverted suspension 1 is stabilized in the up-and-down moving process by the cone-shaped limiting pin 4 and the limiting groove guide rail 3, and is prevented from shifting or rotating;

The working principle is as follows: when the underground water pressure is increased, the water level in the decompression well pipe 6 rises, when the water level in the decompression well pipe 6 rises to the conical inverted suspension 1, the conical inverted suspension 1 immersed in water moves upwards under the buoyancy effect and is separated from the bottom limit ring 2, the horizontal overflow port 7 of the decompression well is opened and water begins to be discharged, and the cone limit pins 4 at the two sides of the conical inverted suspension 1 are positioned in the limit groove guide rail 3, so that the lifting operation process of the conical inverted suspension 1 is stable; as the water level in the pressure reducing well pipe 6 rises, the conical inverted suspension 1 continues to rise, and the water flow rate of the water flowing through the horizontal overflow port 7 of the pressure reducing well increases; when the conical inverted suspension 1 continues to rise to the position of the top limiting rod 5, the horizontal overflow port 7 of the relief well is completely opened for drainage, and at the moment, the conical inverted suspension 1 is limited by the top limiting rod 5 and does not rise any more, and at the moment, the state is shown in fig. 2.

When the underground water level descends, the water level in the pressure reducing well pipe 6 descends, the conical inverted suspension 1 starts to descend, when the underground water level continues to descend, the conical inverted suspension 1 falls onto the bottom limit ring 2, and the pressure reducing well pipe 6 and the pressure reducing well horizontal overflow port 7 are closed.

According to the utility model, the self weight of an object and the principle of generating buoyancy in water are fully utilized, the conical inverted suspension 1 is moved under the action of buoyancy pushing and self weight, when the water level in the underground water pressure increasing and reducing well pipe 6 rises, the opening of the water discharge and pressure reduction of the horizontal overflow port 7 of the relief well is realized, when the water level in the inner pipe 6 of the relief well is lower, the conical inverted suspension 1 drops to the bottom limit ring 2, and the simultaneous closure of the pressure reducing well pipe 6 and the horizontal overflow port 7 of the relief well is realized, so that the phenomenon that muddy water such as rainwater flows backwards into the well pipe is prevented, and the blocking of a reverse filtering layer of the relief well due to backflow is naturally prevented; the above processes do not need extra power, and the device does not need maintenance at ordinary times.

The foregoing is merely illustrative embodiments of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions that may be easily contemplated by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (5)

1. The utility model provides a from overflow relief well fall suspension type anti-backflow silt blocking device which characterized in that: the pressure reducing well pipe (6) is arranged on the side wall between the bottom limit ring (2) and the top limit rod (5), the pressure reducing well pipe (6) is provided with a pressure reducing well horizontal overflow port (7), the pressure reducing well pipe (6) comprises an upper cylinder and a lower cone, no water or low water level cone falls on the bottom limit ring (2) by self weight in the pressure reducing well pipe (6), the upper cylinder seals the pressure reducing well horizontal overflow port (7), and when the water level of the pressure reducing well pipe (6) rises, the lower cone is separated from the bottom limit ring (2) to drive the upper cylinder to move upwards, and the upper cylinder opens the pressure reducing well horizontal overflow port (7).

2. The self-overflow relief well reverse-hanging anti-backflow plugging device as defined in claim 1, wherein: the bottom limit ring (2) and the top limit rod (5) are connected with the inner wall of the pressure reducing well pipe (6).

3. The self-overflow relief well reverse-hanging anti-backflow plugging device as defined in claim 1, wherein: two cone limiting pins (4) are arranged on two sides of the cone inverted suspension (1), and the cone limiting pins (4) are slidably arranged in limiting groove guide rails (3) on the side wall of the pressure reducing well pipe (6).

4. The self-overflow relief well reverse-hanging anti-backflow plugging device as defined in claim 1, wherein: the conical inverted suspension (1) is made of light plastic materials.

5. The self-overflow relief well reverse-hanging anti-backflow plugging device as defined in claim 1, wherein: the horizontal overflow port (7) of the relief well is vertically connected with the relief well pipe (6).