A high-efficiency oil leakage-proof sealing structure for hydraulic dam

Abstract

The invention discloses a high-efficiency anti-leakage oil sealing structure for a hydraulic dam, comprising a sealing sleeve and a built-in sealing ring, wherein the built-in sealing ring is installed at one end of the inner cavity of a hydraulic cylinder, an outer end of the hydraulic cylinder is provided with an installation groove for installing the sealing sleeve, the inner wall of the installation groove is provided with a female thread, the outer side of the sealing sleeve is provided with a male thread adapted to the female thread, a hydraulic rod through-hole is provided inside the sealing sleeve, the inner wall of the hydraulic rod through-hole is slidably connected with the outer wall of the hydraulic rod, a plurality of evenly spaced annular grooves are provided on the inner wall of the hydraulic rod through-hole, an adhesive layer is bonded inside the annular groove, an annular air bag is bonded outside the adhesive layer, an inflating nozzle is installed on the top of the sealing sleeve, the inflating nozzle is connected with an air pipeline inside the sealing sleeve, and a valve is also installed on the inflating nozzle. The invention forms a multiple extrusion sealing environment between the hydraulic rod and the hydraulic rod after the hydraulic cylinder pushes the hydraulic rod to support the dam surface, thereby improving flood control safety.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic dam sealing, and in particular to a high-efficiency oil leakage-proof sealing structure for a hydraulic dam. Background Art

[0002] Hydraulic dam refers to hydraulic concrete lifting dam, which is a relatively simple movable dam technology in water conservancy technology. It is widely used in agricultural irrigation, fishery, ship lock, seawater tidal barrier, urban river landscape engineering and small hydropower station construction. The hydraulic lifting dam has a scientific mechanical structure, does not block water, is not afraid of mud and sand accumulation; is not affected by floating objects; with a very small loss of water, it can easily wash away the floating objects upstream and make the river clear; the dam is released quickly without affecting flood control safety; and has a strong ability to resist flood impact. It overcomes the shortcomings of traditional movable dams, and at the same time it has all the advantages of traditional dams: it is close to the riverbed like a rubber dam and does not block water (better than a rubber dam), it automatically releases the dam like a flap gate dam to discharge flood water, and can maintain the water level at will; it is as strong and durable as a sluice.

[0003] The hydraulic lifting dam is a kind of movable dam that adopts the mechanical principle of dump trucks and combines the hydraulic structure of pier dam. It has the dual functions of water retaining and water discharge. The structure of the hydraulic lifting dam consists of an arc (or straight) dam surface, hydraulic rods, support rods, hydraulic cylinders and hydraulic pump stations. The hydraulic cylinder directly pushes the back of the movable water retaining dam surface with the bottom as the axis to achieve the purpose of raising the dam to retain water and lowering the dam to discharge floods. The sliding support rod is used to support the back of the movable dam surface to form a stable supporting pier dam. Small hydraulic cylinders and limit cards are used to form a mutual exchange between the fixed and movable supporting pier dams, so as to achieve the purpose of fixed water retaining and movable dam lowering. A manual push rod switch is used to control the hydraulic system, and the lifting and lowering of the movable dam surface is manually operated according to the rise and fall of floods.

[0004] In existing hydraulic dams, after the hydraulic cylinder pushes the hydraulic rod to support the dam surface, there is a risk of oil leakage due to insufficient sealing at the connection between the hydraulic cylinder end and the hydraulic rod, resulting in insufficient internal oil pressure and causing failure or weakening of support for the dam surface, which is not conducive to flood control safety.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0006] The object of the present invention is to provide a high-efficiency oil leakage prevention sealing structure for a hydraulic dam to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-efficiency anti-oil leakage sealing structure for a hydraulic dam, comprising a sealing sleeve and a built-in sealing ring, wherein the built-in sealing ring is installed at one end of the inner cavity of a hydraulic oil chamber of a hydraulic cylinder, one end of the hydraulic rod is fixedly connected to a pushing piston located in the hydraulic oil chamber and slidably connected to the inner wall of the hydraulic oil chamber, the other end of the hydraulic rod is fixedly connected to one side of a dam surface, an outer end of the hydraulic cylinder is provided with an installation groove for installing the sealing sleeve, the inner wall of the installation groove is provided with a female thread, and the outer side of the sealing sleeve is provided with a female thread connected to the female thread The sealing sleeve is provided with a male thread matching the thread, the installation groove and the sealing sleeve are threadedly connected, the sealing sleeve is provided with a hydraulic rod through-hole inside, the inner wall of the hydraulic rod through-hole is slidably connected with the outer wall of the hydraulic rod, the inner wall of the hydraulic rod through-hole is provided with a plurality of annular grooves with uniform spacing, the inside of the annular groove is bonded with an adhesive layer, the outer side of the adhesive layer is bonded with an annular airbag, an inflation nozzle is installed on the top of the sealing sleeve, the inflation nozzle is communicated with the air supply pipeline inside the sealing sleeve, the air supply pipeline is communicated with each annular airbag, and the inflation nozzle is also installed with a valve.

[0008] Furthermore, the inflation nozzle is equipped with a gas pressure gauge, and the gas pressure gauge is arranged between the sealing sleeve and the valve.

[0009] Furthermore, the number of the annular grooves and the annular airbags are 3-5.

[0010] Furthermore, a micro air pump is fixedly installed on the outer side of the hydraulic cylinder, and the output end of the micro air pump is connected to the inflation nozzle through an air supply pipeline.

[0011] Furthermore, the sealing sleeve is made of steel material, and the outer side of the sealing sleeve and the inner side of the hydraulic rod through hole are plated with zinc powder.

[0012] Furthermore, the sealing sleeve is sleeved with a rubber gasket for dust prevention.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) The present invention has multiple built-in annular airbags that are inflated after the hydraulic cylinder pushes the hydraulic rod to support the dam surface, forming a multiple extrusion sealing environment between the hydraulic rod and the airbag. This solves the risk of insufficient internal oil pressure causing oil leakage after the hydraulic cylinder pushes the hydraulic rod to support the dam surface, thereby increasing the safety of flood control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 is a structural schematic diagram of a high-efficiency oil leakage prevention sealing structure for a hydraulic dam according to an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 A is an enlarged structural diagram;

[0018] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a sealing sleeve head of a high-efficiency oil leakage prevention sealing structure for a hydraulic dam according to an embodiment of the present invention;

[0019] Figure 4 The diagram is a half-section structural diagram of a high-efficiency oil leakage prevention sealing structure for a hydraulic dam according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] 1. Sealing sleeve; 2. Built-in sealing ring; 3. Installation groove; 4. Annular groove; 5. Annular airbag; 6. Adhesive layer; 7. Gas pipeline; 8. Valve; 9. Gas pressure gauge; 10. Micro air pump; 11. Gas supply pipeline; 12. Push piston; 13. Dam surface; 14. Hydraulic rod; 15. Hydraulic cylinder; 16. Hydraulic oil chamber; 17. Hydraulic rod perforation; 18. Inflator nozzle; 19. Rubber gasket. DETAILED DESCRIPTION

[0022] Below, the invention is further described in conjunction with the accompanying drawings and specific embodiments:

[0023] See also Figure 1-4According to an embodiment of the present invention, a high-efficiency anti-oil leakage sealing structure for a hydraulic dam includes a sealing sleeve 1 and a built-in sealing ring 2, wherein the built-in sealing ring 2 is installed at one end of the inner cavity of a hydraulic oil chamber 16 of a hydraulic cylinder 15, one end of the hydraulic rod 14 is fixedly connected to a pushing piston 12 located in the hydraulic oil chamber 16 and slidably connected to the inner wall of the hydraulic oil chamber 16, and the other end of the hydraulic rod 14 is fixedly connected to one side of a dam surface 13 to form a support, an outer end of the hydraulic cylinder 15 is provided with a mounting groove 3 for mounting the sealing sleeve 1, the inner wall of the mounting groove 3 is provided with a female thread, and the outer side of the sealing sleeve 1 is provided with a male thread adapted to the female thread, and the mounting groove 3 is threadedly connected to the sealing sleeve 1, and the connection The sealing sleeve 1 is firm, and a hydraulic rod through-hole 17 is provided inside the sealing sleeve 1. The inner wall of the hydraulic rod through-hole 17 is slidably connected with the outer wall of the hydraulic rod 14 so that the hydraulic rod 14 can freely extend and retract. The inner wall of the hydraulic rod through-hole 17 is provided with a plurality of evenly spaced annular grooves 4. An adhesive layer 6 is bonded inside the annular groove 4. An annular airbag 5 is bonded outside the adhesive layer 6 so that the annular airbag 5 is fixed in position to avoid deformation and displacement after inflation. An inflation nozzle 18 is installed on the top of the sealing sleeve 1. The inflation nozzle 18 is connected to the air supply pipe 7 inside the sealing sleeve 1. The air supply pipe 7 is connected to each annular airbag 5. The inflation nozzle 18 is also installed with a valve 8 for easy inflation and deflation.

[0024] Through the above solution of the present invention, the inflation nozzle 18 is installed with a gas pressure gauge 9, and the gas pressure gauge 9 is arranged between the sealing sleeve 1 and the valve 8.

[0025] Through the above solution of the present invention, the number of the annular groove 4 and the annular airbag 5 is 3-5 for multiple sealing protection.

[0026] Through the above solution of the present invention, a micro air pump 10 is fixedly installed on the outer side of the hydraulic cylinder 15 , and the output end of the micro air pump 10 is connected to the inflation nozzle 18 through the air supply pipe 11 .

[0027] Through the above solution of the present invention, the sealing sleeve 1 is made of steel material, and the outer side of the sealing sleeve 1 and the inner side of the hydraulic rod through hole 17 are plated with zinc powder to increase the anti-corrosion performance.

[0028] Through the above solution of the present invention, the sealing sleeve 1 is sleeved with a dustproof rubber gasket 19 to prevent dust from entering the threaded connection and making it difficult to disassemble.

[0029] In specific applications, the hydraulic oil in the hydraulic cylinder 15 pushes the pushing piston 12 so that the hydraulic rod 14 supports the dam surface 13. After the support is in place, the oil supply to the hydraulic oil chamber 16 is stopped, and the built-in sealing ring 2 performs the first step of oil leakage protection. The micro air pump 10 and the valve 8 are opened to inflate the annular air bag 5, and the gas pressure gauge 9 is observed to fill the appropriate amount of gas. The valve 8 and the micro air pump 10 are closed, and the annular air bag 5 expands and squeezes and fits with the hydraulic rod 14 for multiple sealing. When it is necessary to lower the dam, the valve 8 is opened to deflate the annular air bag 5. After the deflation is completed, the oil discharge from the hydraulic oil chamber 16 is reduced and the dam can be lowered, thereby realizing the function of preventing oil leakage and improving safety and flood prevention.

[0030] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top end", "bottom end", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-efficiency oil leakage prevention sealing structure for a hydraulic dam, characterized in that: The invention comprises a sealing sleeve (1) and a built-in sealing ring (2), wherein the built-in sealing ring (2) is installed at one end of the inner cavity of a hydraulic oil chamber (16) of a hydraulic cylinder (15), one end of a hydraulic rod (14) of a hydraulic dam is fixedly connected to a pushing piston (12) located in the hydraulic oil chamber (16) and slidably connected to the inner wall of the hydraulic oil chamber (16), the other end of the hydraulic rod (14) is fixedly connected to one side of a dam surface (13), an outer end of the hydraulic cylinder (15) is provided with a mounting groove (3) for mounting the sealing sleeve (1), the inner wall of the mounting groove (3) is provided with a female thread, the outer side of the sealing sleeve (1) is provided with a male thread matching the female thread, the mounting groove (3) and the sealing sleeve (1) are threadedly connected, the interior of the sealing sleeve (1) is provided with a penetrating hydraulic rod through hole (17), the hydraulic rod through hole (17) The inner wall of the hydraulic rod through hole (17) is slidably connected to the outer wall of the hydraulic rod (14); the inner wall of the hydraulic rod through hole (17) is provided with a plurality of evenly spaced annular grooves (4); an adhesive layer (6) is bonded to the inside of the annular groove (4); an annular air bag (5) is bonded to the outside of the adhesive layer (6); an inflatable air nozzle (18) is installed on the top of the sealing sleeve (1); the inflatable air nozzle (18) is connected to the gas pipeline (7) inside the sealing sleeve (1); the gas pipeline (7) is connected to each annular air bag (5); the inflatable air nozzle (18) is also provided with a valve (8); the inflatable air nozzle (18) is provided with a gas pressure gauge (9); the gas pressure gauge (9) is provided between the sealing sleeve (1) and the valve (8); the number of the annular grooves (4) and the number of the annular air bags (5) are 3-5.

2. A high-efficiency oil leakage prevention sealing structure for a hydraulic dam according to claim 1, characterized in that: A micro air pump (10) is fixedly mounted on the outer side of the hydraulic cylinder (15), and the output end of the micro air pump (10) is connected to the inflation nozzle (18) via an air supply pipe (11).

3. A high-efficiency oil leakage prevention sealing structure for a hydraulic dam according to claim 1, characterized in that: The sealing sleeve (1) is made of steel material, and the outer side of the sealing sleeve (1) and the inner side of the hydraulic rod through hole (17) are both plated with zinc powder.

4. A high-efficiency oil leakage prevention sealing structure for a hydraulic dam according to claim 1 or 3, characterized in that: The sealing sleeve (1) is sleeved with a rubber gasket (19) for dust prevention.

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