CN113585181A - Dam upstream hydraulic self-seeking through type piping plugging device, system and method - Google Patents
Dam upstream hydraulic self-seeking through type piping plugging device, system and method Download PDFInfo
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- CN113585181A CN113585181A CN202110792890.4A CN202110792890A CN113585181A CN 113585181 A CN113585181 A CN 113585181A CN 202110792890 A CN202110792890 A CN 202110792890A CN 113585181 A CN113585181 A CN 113585181A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
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Abstract
The invention provides a dam upstream hydraulic self-seeking through type piping plugging device, system and method, which can automatically seek a piping inlet, automatically enter a piping channel and effectively plug a piping port and the channel. The device comprises: a central inflation bulb comprising: the expansion body which rapidly expands after absorbing water to block a piping channel, a waterproof elastic membrane which is coated on the outer surface of the central expansion ball and prevents water from entering, a water absorption port arranged on the waterproof elastic membrane, and a water-soluble covering membrane which covers the water absorption port; outer tribulus ball sets up around central inflation ball, is malleable spheroid, includes: a puncture needle member extending outwardly from the outer surface of the central expansion ball in the radial direction of the outer layer puncture needle ball and capable of extending out of the puncture needle support to puncture the piping wall for positioning; and the spherical telescopic filter screen is covered on the surface of the outer layer caltrop ball, can expand and deform along with the outer layer caltrop ball and is used for water and sand permeation.
Description
Technical Field
The invention belongs to the technical field of dam flood control emergency reinforcement, and particularly relates to a dam upstream hydraulic self-seeking through type piping plugging device, system and method.
Background
Piping is used as a common engineering problem in an earth and rock dam, and needs to be timely and effectively monitored and processed, otherwise, huge potential safety hazards are caused to hydraulic buildings, and the life and property safety of people is endangered. The damage of piping to earth and rockfill dams is mainly as follows: firstly, if the fine soil particles are taken away and block a downstream reverse-filtration drainage body, the leakage condition is worsened; secondly, as the fine particles are taken away, the dam body or the foundation soil skeleton is damaged, the pore passage is enlarged, the foundation soil is emptied, larger settlement is generated, the stability of the dam is damaged, and accidents such as dike breaking, dam collapse, gate switching and the like are even caused seriously.
At present, through research on a large number of engineering problems and accumulation of actual construction experience, piping problems have already had certain prevention and treatment and response measures in engineering practice, and some scholars have conducted deep research and discussion on piping occurrence mechanisms and prevention and treatment methods through technical modes such as model tests, numerical simulation and the like. The common prevention measures in the current engineering mainly include the following measures:
a. the reverse filter surrounding well method: the method is mainly used for the condition of concentrated outflow of piping. The well can be divided into a sand reverse filter well, a tip reverse filter well and a geotextile reverse filter well according to different materials. The use is comparatively common exactly that the grit anti-filtration encloses the well at present, mainly to the piping phenomenon that produces at the position of embankment backing water.
b. And (3) pressing a reverse filtering layer: the method can be prioritized under the condition that the material source is sufficient. The specific method comprises the steps of cleaning sundries in the cover, then filling the water outlet, covering the upper cover with a soil pressing bag or sand and stone, and conducting seepage-guiding treatment.
c. Water storage and back pressure: the method is used for generating piping in a pool and a low-lying area, and the situations of piping, large-scale piping groups, large-scale soil loss and the like occur at the position close to the dam.
d. Hydraulic infiltration platform: the method is characterized in that soft mud and sundries are removed in the piping occurrence range, and the serious piping outlet is filled with bricks, gravels, blockstones and the like; and after the water potential is eliminated, building a hydraulic infiltration platform by using sandy soil with high water permeability.
e. The emergency protection method of the underwater piping comprises the following steps: piping which appears underwater in a pool pit, a ditch, a pond, a depression and the like can be treated by methods of pond filling, underwater reverse filtration, pond water level elevation and the like. When the area of the pit is small and the soil taking condition is good, the capping treatment by filling the pit can be adopted. When the area of the pond is large, the pond is treated by adopting an underwater reverse filtration method or a water pumping and pond injecting water level raising method.
In the current research, most of the schemes for repairing the piping are to block the piping outlet, and the plugging methods in the piping inlet and the piping channel are rarely researched. The reason for this is that: firstly, no accurate and effective equipment is provided for detecting a piping generation port; secondly, the plugging device at the piping inlet and in the channel can not meet the requirements of strength, shape and the like under the condition of hydrodynamic pressure. And although the existing prevention measures have advantages and are suitable for certain working conditions, most of the existing prevention measures have the problems of complex working procedures, poor flexibility, long early-stage arrangement time, poor economy and the like.
Disclosure of Invention
The present invention is made to solve the above problems, and an object of the present invention is to provide a hydraulic self-seeking through-type piping plugging device, system and method for upstream of a dam, which can automatically seek a piping inlet, automatically enter a piping channel, and effectively and automatically plug a piping port and a channel.
In order to achieve the purpose, the invention adopts the following scheme:
< apparatus >
The invention provides a dam upstream hydraulic self-seeking through piping plugging device, which is characterized by comprising: a central inflation bulb comprising: the expansion body which rapidly expands after absorbing water to block a piping channel, a waterproof elastic membrane which is coated on the outer surface of the central expansion ball and prevents water from entering, a water absorption port arranged on the waterproof elastic membrane, and a water-soluble covering membrane which covers the water absorption port; outer tribulus ball sets up around central inflation ball, is malleable spheroid, includes: a puncture needle member extending outwardly from the outer surface of the central expansion ball in the radial direction of the outer layer puncture needle ball and capable of extending out of the puncture needle support to puncture the piping wall for positioning; and the spherical telescopic filter screen is covered on the surface of the outer layer caltrop ball, can expand and deform along with the outer layer caltrop ball and is used for water and sand permeation.
Preferably, the hydraulic self-seeking through-type piping plugging device upstream of a dam according to the present invention may also have such a feature that all spike members are uniformly arranged around the spherical surface of the central expansion ball.
Preferably, the hydraulic self-seeking through-type piping plugging device for upstream of the dam according to the present invention may further have the following characteristics: each lancet member comprises: a circular push plate, a puncture needle and a node ring; the inner end of the puncture needle is arranged by being jointed with the surface of the central expansion ball through the circular push plate, and the outer end of the puncture needle is in a conical spike shape and can penetrate through a node ring positioned at the node of the puncture needle ball support to be outward punctured.
Preferably, the hydraulic self-seeking through-type piping plugging device for upstream of the dam according to the present invention may further have the following characteristics: the spike member is provided with at least six.
Preferably, the hydraulic self-seeking through-type piping plugging device for upstream of the dam according to the present invention may further have the following characteristics: the expansion material is a SAC (quick setting sulphoaluminate cement) system material.
Preferably, the hydraulic self-seeking through-type piping plugging device for upstream of the dam according to the present invention may further have the following characteristics: the spherical telescopic filter screen is a 100-400 mesh filter screen.
< System >
Further, the invention also provides a hydraulic self-seeking through-type piping plugging system for upstream of a dam, which is characterized by comprising: at least two plugging balls, the plugging balls being a hydraulic self-seeking through piping plugging device of the dam upstream described in any one of the above < devices >; and connecting all the blocking balls in sequence to form a connecting chain of a ring chain (ring) connected end to end. The blocking balls are sequentially connected in series to form a ring, so that the water pressure borne by the blocking ball chain in multiple directions is relatively balanced, the balls can be mutually pulled and restricted, the searching power is relatively stable, the success rate of hydraulic self-searching is improved, and the interference of disordered water flow to a single ball is reduced.
Preferably, the hydraulic self-seeking through-type piping plugging system for upstream of the dam according to the invention can also have the following characteristics: the volumes of the at least two plugging balls before and after expansion are different.
Preferably, the hydraulic self-seeking through-type piping plugging device for upstream of the dam according to the present invention may further have the following characteristics: the number of the blocking balls is three, so that the stability is the best.
Preferably, the hydraulic self-seeking through-type piping plugging device for upstream of the dam according to the present invention may further have the following characteristics: of the three occluding spheres, two are equal in volume (called small spheres), the third is largest (called large spheres), and the expanded volume of the large spheres is at least 4 times that of the small spheres.
Preferably, the hydraulic self-seeking through-type piping plugging device for upstream of the dam according to the present invention may further have the following characteristics: the connecting chain is used for fixedly connecting the caltrop ball support of the hydraulic self-searching through type piping plugging device at the upstream of the adjacent dam.
< method >
Further, the invention also provides a dam upstream hydraulic self-seeking through type piping plugging method, which is characterized by comprising the following steps: step 1, throwing a plurality of prefabricated plugging ball chains near a piping port vortex to search in multiple directions, and enabling the plugging ball chains closest to the piping port vortex to automatically search for the piping port by virtue of vortex suction, so that at least one plugging ball chain enters a piping channel; the blocking ball chain is a dam upstream hydraulic self-seeking through-type piping blocking system described in any one of the above < system >; and 2, dissolving the water-soluble film for plugging the water absorbing port in water, continuously entering the central expansion ball under the action of pressure difference and water absorption of the expansion body to react with the expansion body, quickly and automatically expanding and hardening the expansion body in a piping channel after water absorption so as to plug the pipeline, simultaneously driving the puncture needle ball support to expand and expand, penetrating the tip of the puncture needle component into the piping wall for supporting and fixing, and blocking sand and water by using a spherical telescopic filter screen to assist in plugging. And 3, when the muddy water at the piping outlet behind the dam is observed to be converted into clear water, the plugging completion can be determined.
Preferably, the method for blocking hydraulic self-seeking through-type piping upstream of a dam according to the present invention may further have the following characteristics: the blocking ball chain is prefabricated by the following method: according to the previous flood hydrology data in the non-flood season, including the flood flow, the flow rate, the submerging depth and the piping port forming position and size which occur in the past, a piping plugging simulation experiment is carried out, and parameters of a plugging ball chain capable of realizing hydraulic self-seeking rapid plugging of the piping port are determined: the volume of each expansion body and the mass ratio of the outer layer caltrop balls to the central expansion ball.
Preferably, the method for blocking hydraulic self-seeking through-type piping upstream of a dam according to the present invention may further have the following characteristics: the parameters for blocking the ball chain determined by the simulation experiment further include: the number and length of the needle members, the mass of the spherical telescopic screens, and the length and mass of the connecting chains between adjacent plugging balls.
Action and Effect of the invention
According to the dam upstream hydraulic self-searching through type piping plugging device, system and method provided by the invention, hydraulic self-searching is realized by using vortex suction force, so that the plugging ball automatically searches a piping opening and enters a piping channel; meanwhile, a water-soluble film for plugging a water absorbing port is dissolved by water by simulating the water absorbing and expanding process of a globefish, the water-soluble film continuously enters a central expansion ball under the action of pressure difference and water absorption of an expansion body to react with the expansion body, the expansion body rapidly expands and hardens and forms in a piping channel after being triggered by water absorption so as to plug a pipeline, meanwhile, a caltrop ball support and a spherical telescopic filter screen are driven to synchronously expand outwards, and the tip of a pricker member is pushed to pierce the piping wall to support and fix the plugging ball in the piping channel; the spherical telescopic filter screen is used for blocking sand and passing water and assisting in plugging. In addition, the volume of the caltrop ball support is enlarged, the volume of the outer-layer filter screen is driven to be enlarged, and the plugging area can be further increased; the caltrop ball support is used as a framework, so that the outer-layer filter screen can be prevented from being flattened by water pressure, and the plugging effect is prevented from being influenced; the section of the caltrop ball support is approximately circular, the caltrop ball support can adapt to the water flow characteristic, the water flow drives the caltrop ball support to conduct hydraulic self-searching, the piping channel plugging of various shapes can be met, and the adaptability is good. Through this, reach the effect that ends sand and lead to water, shutoff through type piping, both strive for more time of speedily carrying out rescue work for the rescue personnel, can reduce piping seepage velocity again, prevent effectively practically piping passageway expansion in order to avoid causing larger-scale accidents such as break, switching back, reduce the security threat to low reaches resident, building. The invention has simple structure, convenient construction and strong flexibility, can be assembled and used quickly on site, and can adapt to the characteristics and requirements of quick emergency repair of the through piping.
Drawings
Fig. 1 is a schematic structural diagram (before water absorption) of a hydraulic self-seeking through-type piping plugging device at the upstream of a dam according to an embodiment of the invention;
fig. 2 is a perspective view of a hydraulic self-seeking through-type piping plugging device upstream of a dam according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a hydraulic self-seeking through-type piping plugging device on the upstream of a dam according to an embodiment of the invention (after water absorption);
fig. 4 is a schematic diagram of the process of putting, self-seeking and blocking the hydraulic self-seeking through-type piping block method of the upstream of the dam according to the embodiment of the invention.
Detailed Description
The hydraulic self-seeking through-type piping plugging device, system and method for upstream of dam according to the present invention will be described in detail with reference to the accompanying drawings.
< example >
As shown in fig. 1 to 4, a hydraulic self-seeking through-type piping plugging system 100 (hereinafter referred to as a plugging ball chain 100) upstream of a dam includes at least two hydraulic self-seeking through-type piping plugging devices 10 (hereinafter referred to as plugging balls 10) upstream of the dam and a connecting chain 20.
As shown in fig. 1 to 3, the blocking ball 10 specifically includes a central expansion ball 11, an outer layer caltrop ball 12, and a spherical telescopic filter screen 13.
The central inflatable ball 11 includes an inflatable body 11a, a waterproof elastic membrane 11b, a water suction port 11c, and a water-soluble coating 11 d.
The expansion body 11a can rapidly expand in volume after water absorption to block the piping passage. The expansion body 11a is made of SAC system materials, SAC is mainly used as a gelling component, bentonite is used as a filler component, PAM is used as an anti-dispersion component, and a water reducing agent, an accelerating agent and an expanding agent are used as auxiliary materials. Wherein the montmorillonite content of the bentonite filler is not less than 60%, the pH value is 7-9, the expansion multiple is 30, and the granularity is 1250 meshes; the accelerator is an HB accelerator; the water reducing agent is a Point-400 high-efficiency water reducing agent; the anti-dispersant is Polyacrylamide (PAM) with the molecular weight of 800 ten thousand; the swelling agent is sodium polyacrylate super absorbent resin (SAP) which is white powdery particles.
The waterproof elastic membrane 11b is coated on the outer surface of the central expansion ball 11, and can prevent water from entering the expansion body 11 a. In this embodiment, the waterproof elastic film 11b is a rubber film. When the expansion body 11a absorbs water and expands to a certain degree, the waterproof elastic membrane 11b is broken, so that the expansion body 11a is exposed in a large area, the contact area between the expansion body 11a and water is enlarged, and the expansion is accelerated.
The water suction port 11c is formed in the waterproof elastic film 11b in a hole shape.
The water-soluble coating 11d covers the water suction port 11c, in the embodiment, the water-soluble coating 11d is a PVA soluble coating, under the sheet test of 6cm multiplied by 6cm at the water temperature of 25 ℃, the tensile strength of the water-soluble coating 11d is more than 25MPa, the dissolution starting time is less than 25 seconds, and the complete dissolution time is less than 20 minutes, so that the special underwater working environment when the through type piping occurs can be adapted, the dissolution starting time is short, and the reaction time requirement of the plugging material can be effectively matched.
The outer tribulus terrestris ball 12 is arranged around the central expansion ball 11 and is a malleable sphere. The outer bulb 12 includes a bulb holder 12a and a plurality of spike members 12 b.
The caltrop ball support 12a is a Hobmann ball structure, is a freely telescopic expandable ball created by utilizing the special geometric property of a pivot structure, has good deformation performance, can keep the shape of the ball unchanged when the volume is expanded or reduced, and has certain overload capacity (hyperstatic structure). In the embodiment, the caltrop ball support 12a is made of polylactic acid materials, the tensile strength can reach 40-60MPa, the sealing performance is strong, the consumption is low, the environment is protected, the degradation is realized, the cost is low, and the manufacturing is finished through one-step injection molding of a factory mold.
All of the lancet members 12b are uniformly arranged around the spherical surface of the central expansion ball 11, and six lancet members 12b are provided in this embodiment. Each spike member 12b extends outwardly from the outer surface of the central inflation bulb 11 along the radius of the outer bulb 12 and is capable of extending out of the bulb holder 12a to penetrate the piping wall for positioning. Each lancet member 12b includes a circular push plate 12b-1, lancet 12b-2 and nodal circular ring 12 b-3. The circular push plate 12b-1 is in direct contact with the central expansion ball 11 and can be pushed outwards after the central expansion ball 11 is expanded. The inner end of the puncture needle 12b-2 is arranged by a round push plate 12b-1 which is jointed with the surface of the central expansion ball 11, and the outer end is in a conical spike shape and can be penetrated through a node ring 12b-3 at the node of the puncture needle 12a and be outwardly punctured. A node circular ring 12b-3 is fixed at the node of the caltrop ball support 12a and corresponds to the circular push plate 12b-1, and the inner diameter of the ring corresponds to the outer diameter of the puncture needle 12b-2, so that the puncture needle 12b-2 can freely extend out. As shown in FIG. 3, when the central expansion ball 11 absorbs water and expands, the circular push plate 12b-1 is pushed outwards by the central expansion ball 11, and drives the puncture needle 12b-2 to drive the fixed puncture needle to puncture outwards, so that the puncture needle 12b-2 is inserted into the piping wall for positioning and supporting.
The spherical telescopic filter screen 13 covers the surface of the outer layer caltrop ball 12, can expand and deform along with the outer layer caltrop ball 12, and is used for water permeation, sand blocking and auxiliary plugging. In the embodiment, the adopted spherical telescopic filter screen 13 is a 400-mesh terylene nylon filter screen with the aperture of 0.0374mm, and has the advantages of compactness, transparency, high strength, large elongation, excellent elasticity and good elasticity and wear resistance.
As shown in fig. 4, the connecting chain 20 connects all the blocking balls 10 in sequence to form an end-to-end ring chain. In this embodiment, the connecting chain 20 is a chain shape formed by fixedly connecting the caltrop ball supports of the hydraulic self-seeking through-type piping plugging device at the upstream of the adjacent dam.
In this embodiment, the blocking ball chain 100 includes three "two small and one large" blocking balls 10, which are two-stage formulations, that is, the blocking balls 10 having two different masses (or volumes) of the expansion bodies 11a, the diameter of the expansion body 11a in the first blocking ball 10 (small ball) is smaller than that of the second blocking ball 10 (large ball), the filling materials of the large ball and the small ball are SAC system materials, but the filling amounts are different, taking a piping channel with a blocking diameter of 15cm as an example, the mass (or volume) of the filling material of the large ball is about 2 times that of the small ball, and the volume of the expanded large ball is more than 4 times that of the small ball. Three situations can occur during plugging: the big ball is blocked, and the two small balls are outside; the two small balls are blocked, and the big ball is outside; a small ball is blocked, and one big ball and one small ball are arranged outside; in the first condition, two-stage blockage is formed, two small balls on the outer side are fixed at the piping opening through the puncture needle 12b-2 to form piping opening pre-blockage, and a large ball on the inner side forms a channel for blockage; in the second situation, three-stage blockage is formed, the large ball on the outer side is fixed at the piping opening through the puncture needle 12b-2 to form piping opening pre-blockage, and the two small balls on the inner side form two-stage channel blockage, so that the blocking effect is best; in the third case, two-stage blockage is formed, wherein the outer big ball and the small ball are fixed on the piping opening through the puncture needle 12b-2 to form the piping opening pre-blockage, and the inner small ball forms the blockage in the channel. The three conditions can meet the requirement of plugging the through piping in the scheme, and the pre-plugging of the piping port formed under the three conditions can play a good role in protecting the blockage in the channel and stopping the flow to buffer the blockage.
The above is the specific structure of the plugging ball chain 100 and the plugging ball 10 provided in this embodiment, and the following describes a specific method for performing hydraulic self-seeking through-type piping plugging by using them:
And 2, dissolving the water-soluble coating 11d on the plugging ball 10 after meeting water, enabling the water to enter the water suction port 11c, continuously entering the central expansion ball 11 under the action of pressure difference and water absorption of the expansion body 11a to react with the expansion body 11a, quickly and automatically expanding, hardening and forming the expansion body 11a in a piping channel after absorbing water so as to plug a pipeline, simultaneously driving the caltrop ball support 12a and the spherical telescopic filter screen 13 to synchronously expand outwards to increase the volume quickly, wherein the puncture needle 12b-2 component receives the pushing force of the expansion body 11a in the process, the tip part penetrates into the piping wall to support and fix, the expanded caltrop ball support 12a plays the roles of strengthening the plugging structure strength and supporting and fixing, and the spherical telescopic filter screen 13 blocks sand and water to assist in plugging.
And 3, when the muddy water at the piping outlet behind the dam is converted into clear water, the piping channel can be confirmed to be blocked.
The plugged ball chain 100 used in step 1 is prefabricated by the following method:
in the non-flood season, according to the past flood hydrological data of the area, including the flood flow, the flow rate, the submerging depth, the piping port forming position, the size and the like which occur in the past, a piping plugging simulation experiment is carried out, and one or more of the parameters of the plugging ball chain 100 which can realize hydraulic self-seeking rapid plugging of the piping port are determined: the volume of each expansion body 11a, the expansion times of the expansion bodies 11a, the mass ratio of the outer layer tribulus terrestris ball 12 to the central expansion ball 11, the maximum expansion times of the outer layer tribulus terrestris ball 12, the number and the length of the puncture needle members 12b, the mass of the spherical telescopic filter screen 13, the maximum expansion times of the spherical telescopic filter screen 13, the length and the mass of the connecting chain 20 between the adjacent plugging balls 10 and the like. For example, the mass ratio of the caltrop ball support 12a and the expansion body 11a is determined through experiments to ensure that a caltrop ball chain can finally enter a piping port; the specific operation is to carry out a hydraulic test by a method of keeping the mass of the expansion body 11a unchanged, changing the mass of the caltrop ball support 12a, keeping the mass of the caltrop ball support 12a unchanged, and changing control variables such as the mass of a plugging main body.
In addition, if the past flood hydrological data of the area include a plurality of conditions with large differences (for example, the difference between the formation position and the size of the piping port is large), the parameters of the plugging ball chain 100 which can adapt to different conditions can be determined through a piping plugging simulation experiment, and then a plurality of plugging ball chains 100 are prefabricated. When the device is used, various plugging ball chains 100 are thrown, and the adaptive plugging ball chains 100 can plug piping channels, so that the device can be suitable for different situations.
The above embodiments are merely illustrative of the technical solutions of the present invention. The hydraulic self-seeking through-type piping plugging device 10, system and method for upstream of a dam according to the present invention are not limited to the structure described in the above embodiments, but are subject to the scope defined by the following claims. Any modification, or addition, or equivalent replacement by a person skilled in the art on the basis of this embodiment is within the scope of the invention as claimed.
Claims (10)
1. A dam upstream hydraulic self-seeking through piping plugging device, comprising:
a central inflation bulb comprising: the volume of the expansion body rapidly expands after absorbing water so as to block a piping channel, a waterproof elastic membrane which is coated on the outer surface of the central expansion ball and prevents water from entering, a water absorption port which is arranged on the waterproof elastic membrane, and a water-soluble film which is covered at the water absorption port;
outer tribulus terrestris ball, around the setting of center inflation ball is malleable spheroid, includes: a puncture needle member extending outwardly from the outer surface of the central balloon in a radial direction of the outer layer puncture needle and capable of protruding out of the puncture needle member to penetrate the piping wall for positioning; and
the spherical telescopic filter screen is covered on the surface of the outer layer caltrop ball, can expand and deform along with the outer layer caltrop ball, and is used for permeating water and blocking sand.
2. A dam upstream hydraulic self-seeking pass-through piping plugging device according to claim 1 wherein:
wherein all of the spike members are evenly disposed about the spherical surface of the central expansion ball.
3. A dam upstream hydraulic self-seeking pass-through piping plugging device according to claim 1 wherein:
wherein each of the lancet members comprises: a circular push plate, a puncture needle and a node ring;
the inner end of the puncture needle is attached to the surface of the central expansion ball through the circular push plate, and the outer end of the puncture needle is in a conical spike shape and can penetrate through the node circular ring at the node of the caltrop ball support to be punctured outwards.
4. A hydraulic self-seeking through piping plugging system for upstream of a dam, comprising:
at least two blocking balls, which are hydraulic self-seeking through-type piping blocking devices of the upstream of the dam according to any one of claims 1 to 3; and
and sequentially connecting all the plugging balls to form a ring-chain-shaped connecting chain which is connected end to end.
5. A dam upstream hydraulic self-seeking pass-through piping plugging system according to claim 4 wherein:
wherein the volumes of at least two of the plugging balls before and after expansion are different.
6. A dam upstream hydraulic self-seeking pass-through piping plugging system according to claim 4 wherein:
wherein, the shutoff ball is three.
7. A dam upstream hydraulic self-seeking pass-through piping plugging system according to claim 6 wherein:
wherein two of the three said containment spheres are equal in volume, the third is the largest, and the third expanded volume is at least 4 times greater than the first two.
8. A dam upstream hydraulic self-seeking through piping plugging method is characterized by comprising the following steps:
step 1, throwing a plurality of prefabricated plugging ball chains near a piping port vortex to search in multiple directions, and enabling the plugging ball chains closest to the piping port vortex to automatically search a piping port by virtue of vortex suction, so that at least one plugging ball chain enters a piping channel; the blocking ball chain is the dam upstream hydraulic self-seeking through-type piping blocking system of any one of claims 5 to 7;
and 2, dissolving the water-soluble film for plugging the water absorbing port in water, continuously entering the central expansion ball under the action of pressure difference and water absorption of the expansion body to react with the expansion body, quickly and automatically expanding and hardening the expansion body in a piping channel after water absorption so as to plug the pipeline, simultaneously driving the puncture needle ball support to expand and expand, penetrating the tip of the puncture needle component into the piping wall for supporting and fixing, and blocking sand and water by using a spherical telescopic filter screen to assist in plugging.
9. The method of claim 8 for hydraulic self-contained pass-through piping plugging upstream of a dam, wherein:
wherein, the blocking ball chain is prefabricated by the following method:
according to the previous flood hydrological data in the non-flood season, including the flood flow, the flow speed, the submerging depth and the piping port forming position and size which occur in the past, a piping plugging simulation experiment is carried out, and the parameters of the plugging ball chain which can realize hydraulic self-seeking rapid plugging of the piping port are determined: the volume of each expansion body and the mass ratio of the outer layer caltrop balls to the central expansion ball.
10. The method of claim 8 for hydraulic self-contained pass-through piping plugging upstream of a dam, wherein:
wherein the parameters of the blocking ball chain determined by the simulation experiment further include: the number and length of the needle members, the mass of the spherical telescopic screens, and the length and mass of the connecting chains between adjacent plugging balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110792890.4A CN113585181B (en) | 2021-07-14 | 2021-07-14 | Dam upstream hydraulic self-seeking through type piping plugging device, system and method |
Applications Claiming Priority (1)
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| CN114941309A (en) * | 2022-06-16 | 2022-08-26 | 济南市水文中心(济南市水土保持监测站) | Dam piping plugging device and using method thereof |
| CN115182306A (en) * | 2022-08-11 | 2022-10-14 | 李圣 | Water-stopping and seepage-proofing construction method for hydraulic engineering |
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| CN113585181B (en) | 2022-08-30 |
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