Tear-resistant rubber dam

Abstract

The utility model provides an anti-tearing rubber dam which comprises a dam foundation transversely arranged along a river channel, dam heads are arranged at the two ends of the dam foundation, a rubber dam bag is connected between the two dam heads, the two ends of the rubber dam bag are anchored to the dam foundation in the river channel direction respectively, and closed spaces are formed in the dam heads and the rubber dam bag. The dam foundation is provided with an inflation and exhaust pipeline communicating with the interior of the rubber dam bag, and the inflation and exhaust pipeline is used for inflating and exhausting gas or liquid media into the rubber dam bag. The rubber dam is simple in overall structure and convenient to install. Aramid cloth with higher wear resistance and tear resistance is selected as framework cloth of the rubber dam bag, namely upper-layer aramid cloth and lower-layer aramid cloth. According to the rubber dam bag and the manufacturing method thereof, the rubber sheets are arranged, the lap joint areas are reserved at the joints of the rubber sheets, and the lap joint areas are independently subjected to vulcanization treatment during connection, so that the structural strength of the joints is higher than that of secondary vulcanization, and the manufactured rubber dam bag has higher tear resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber dams, in particular to a tear-resistant rubber dam. Background Art

[0002] The rubber dam is a new type of low-head water retaining structure that appeared in the 1950s. It is a tape with fiber cloth as the load-bearing skeleton and natural rubber as the protective layer. It is anchored on the river foundation bottom plate and end wall with embedded bolts to form a closed rubber capsule. The rubber capsule is filled with water, air, or water and air to form a rubber flexible body to retain water. The rubber dam has the advantages of simple structure, low investment, short construction period, long service life, and simple operation and management.

[0003] The main body of the rubber dam is the rubber dam bag, which is crucial in the rubber dam system. The traditional rubber dam bag is made of nylon cloth as the skeleton cloth and rubber through vulcanization. In the use environment of some rubber dams, during the summer flood season or the winter cold period, a large number of branches, gravel, ice ballast and other debris will appear in the river channel. The traditional rubber dam bag is more susceptible to damage caused by the hanging and pulling of floating objects. It is also easy to be damaged by human beings during the installation of the rubber dam bag, and its firmness is poor and it is easy to age. In addition, when the existing rubber dam bag is connected to itself and to the dam head, the edges of the vulcanized rubber sheets are directly overlapped and connected by secondary vulcanization. This connection method will result in low strength at the connection point and easy cracks during use. During the water-blocking operation of the rubber dam, once the dam bag is damaged, the water or gas in the rubber dam bag will leak, the dam bag will collapse and lose its water-blocking effect, and the downstream water level will rise instantly, causing ecological damage. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a tear-resistant dam bag for a rubber dam to solve the problems in the prior art that the connection between the dam bag and the dam head of the rubber dam is not tight and is easy to break, and the dam bag body material has poor strength and is easy to be damaged.

[0005] The utility model provides a tear-resistant rubber dam, which comprises: a dam foundation arranged transversely along a river channel, dam heads are arranged at both ends of the dam foundation, a rubber dam bag is connected and arranged between the two dam heads, the two ends of the rubber dam bag are respectively anchored on the dam foundation along the river channel direction, and a closed space is formed between the dam head and the inside of the rubber dam bag; a filling and discharging pipeline connected to the inside of the rubber dam bag is arranged on the dam foundation, which is used for filling and discharging gas or liquid medium into the rubber dam bag.

[0006] Furthermore, a bottom gasket is provided on the upper surface of the dam foundation, and the dam head and the rubber dam bag are anchored to the bottom gasket and the dam foundation by bolts.

[0007] Furthermore, the rubber dam bag is composed of a plurality of rubber sheets, wherein the rubber sheet is formed by bonding an upper rubber sheet and a lower rubber sheet.

[0008] Furthermore, the upper rubber sheet includes an upper aramid cloth and an outer rubber layer, wherein the upper aramid cloth is coated with rubber and the outer rubber layer is fixedly bonded to one side of the upper aramid cloth; the lower rubber sheet includes a lower aramid cloth and an inner rubber layer, wherein the lower aramid cloth is coated with rubber and the inner rubber layer is fixedly bonded to one side of the lower aramid cloth.

[0009] Furthermore, the upper rubber sheet and the lower rubber sheet are stacked in an arrangement of the upper rubber sheet on top and the lower rubber sheet on the bottom, and an interlayer is arranged in the middle; the stacked upper rubber sheet and the lower rubber sheet are vulcanized and bonded outside the overlapping area by a vulcanizer.

[0010] Furthermore, the overlapping area is an area with a width of 70 mm on one side of the adjacent rubber sheet, and an area with a width of 70 mm on one side where the rubber sheet overlaps the dam head.

[0011] Furthermore, a vulcanization bonding treatment is performed on the overlapping area after two adjacent rubber sheets are overlapped by a molding machine; and a vulcanization bonding treatment is performed on the overlapping area after the rubber sheet and the dam head are overlapped by a molding machine.

[0012] In the implementation manner of the utility model, the thickness of the outer rubber layer is greater than or equal to 2.5 mm; the thickness of the inner rubber layer is greater than or equal to 2 mm.

[0013] In the implementation manner of the utility model, the thickness of the interlayer is 0.3-0.5 mm.

[0014] According to the above embodiments, the tear-resistant rubber dam provided by the utility model has at least the following benefits: the rubber dam uses aramid cloth with stronger wear resistance and tear resistance as the skeleton cloth of the rubber dam bag, namely the upper aramid cloth and the lower aramid cloth. In addition, an overlap area is reserved at the connection of the rubber sheets, and the overlap area is vulcanized separately during the connection, so that the structural strength of the connection is higher than that of the secondary vulcanization, and the manufactured rubber dam bag has higher tear resistance and can be better applied to rivers with harsh environments. The rubber dam has a simple overall structure, is easy to install, has good tear resistance and a long service life, and can be widely used in industrial and agricultural production, ecological protection, urban beautification and other fields, and plays an active role in the regulation and management of urban and rural water resources.

[0015] It should be understood that the above general description and the following specific embodiments are only exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings are a part of the specification of the present utility model, which illustrate exemplary embodiments of the present utility model. The attached drawings and the description of the specification are used to explain the principle of the present utility model.

[0017] Figure 1 The utility model provides a cross-sectional view of a tear-resistant rubber dam.

[0018] Figure 2 The utility model provides a longitudinal cross-sectional view of a tear-resistant rubber dam.

[0019] Figure 3 The utility model provides a top view of a rubber dam bag of a tear-resistant rubber dam.

[0020] Figure 4 A cross-sectional view of a rubber dam bag of a tear-resistant rubber dam provided by the utility model.

[0021] Figure 5 A schematic diagram of vulcanization of a rubber dam bag of a tear-resistant rubber dam provided by the utility model.

[0022] Figure 6 A schematic diagram of vulcanized overlap of a rubber dam bag of a tear-resistant rubber dam provided by the utility model.

[0023] Description of reference numerals:

[0024] 1- dam foundation, 2- dam head, 3- rubber dam bag, 4- filling and discharge pipes, 5- bottom gasket, 6- vulcanizing machine, 7- molding machine;

[0025] 31-upper aramid cloth, 32-lower aramid cloth, 33-outer rubber layer, 34-inner rubber layer, 35-interlayer, 36-overlapping area. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present invention are now described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features and embodiments of the present invention.

[0027] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention will be apparent to those skilled in the art. The present application description and examples are merely exemplary.

[0028] The utility model provides a tear-resistant rubber dam, such as Figure 1 and 2The figure shows a schematic diagram of the structure of the rubber dam. In a specific embodiment, the rubber dam includes a dam foundation 1 arranged transversely along the river channel, dam heads 2 are arranged at both ends of the dam foundation 1, a rubber dam bag 3 is connected between the two dam heads 2, and the two ends of the rubber dam bag 3 are respectively anchored on the dam foundation 1 along the river channel direction, forming a closed space between the dam head 2 and the rubber dam bag 3. In addition, a filling and discharging pipe 4 connected to the inside of the rubber dam bag 3 is arranged on the dam foundation 1, which is used to fill and discharge gas or liquid medium into the rubber dam bag 3, and adjust the bulge height of the rubber dam bag 3 to achieve different heights of water blocking effect.

[0029] In a specific embodiment of the utility model, a bottom gasket 5 is provided on the upper surface of the dam foundation 1, and the dam head 2 and the rubber dam bag 3 are anchored on the bottom gasket 5 and the dam foundation 1 by bolts. In this embodiment, the bottom gasket 5 can prevent the rubber dam bag 3 from directly contacting the cement of the dam foundation 1 with friction, and prevent the rough friction surface of the dam foundation 1 from damaging the rubber dam bag 3 during use, thereby extending the service life of the rubber dam bag 3. In addition, fixing the rubber dam bag 3 on the bottom gasket 5 makes it easier to seal the joint, which can achieve a better sealing effect.

[0030] In the specific implementation of the utility model, the rubber dam bag 3 is composed of a plurality of rubber sheets. Since the water retaining height of the rubber dam is different, the circumference of the rubber dam bag 3 also changes with the water retaining height. Limited by the size of the vulcanizing machine, the rubber dam bag 3 is almost difficult to be vulcanized and formed in one time, so the rubber dam bag 3 is usually formed by overlapping a plurality of vulcanized rubber sheets.

[0031] Specifically, the rubber sheet is formed by bonding an upper rubber sheet and a lower rubber sheet. Figure 4 As shown, the upper rubber sheet includes an upper aramid cloth 31 and an outer rubber layer 33. The upper aramid cloth 31 is coated with rubber, and the outer rubber layer 33 is fixedly bonded to one side of the upper aramid cloth 31. Preferably, the thickness of the outer rubber layer 33 is greater than or equal to 2.5 mm.

[0032] The lower rubber sheet includes a lower aramid cloth 32 and an inner rubber layer 34. The lower aramid cloth 32 is coated with rubber, and the inner rubber layer 34 is fixedly bonded to one side of the lower aramid cloth 32. Preferably, the thickness of the inner rubber layer 34 is greater than or equal to 2 mm.

[0033] Preferably, the outer rubber layer 33 and the inner rubber layer 34 are both made of rubber with excellent properties such as vulcanized chloroprene rubber, EPDM rubber, and natural rubber. The outer rubber layer 33 has excellent properties such as wear resistance, aging resistance, and cold resistance. The inner rubber layer 34 has the properties of protecting the skeleton cloth and good water tightness and air tightness. In addition, the outer rubber layer 33 is usually located outside the rubber dam bag of the rubber dam, and the inner rubber layer 34 is located inside the rubber dam bag of the rubber dam.

[0034] Furthermore, the upper film and the lower film are stacked and an interlayer 35 is arranged in the middle, and the interlayer 35 has the ability to protect and connect the skeleton cloth and has a high adsorption performance. The skeleton cloth is the upper aramid cloth 31 and the lower aramid cloth 32. Preferably, the thickness of the interlayer 35 is 0.3-0.5 mm.

[0035] Then, if Figure 5 As shown, the stacked upper and lower rubber sheets are subjected to vulcanization bonding treatment outside the overlapping area 36 by a vulcanizer 6. In this embodiment, an overlapping area is reserved at the overlapping edges of two adjacent rubber sheets, and the overlapping area is not vulcanized, so as to facilitate vulcanization connection during the later overlapping connection. The overlapping area is not vulcanized in order to avoid secondary vulcanization connection of the overlapping area when connecting multiple rubber sheets, to prevent damage to the rubber sheet caused by secondary vulcanization, thereby reducing the structural strength of the dam bag and avoiding rupture at the connection during use.

[0036] Furthermore, the overlapping area 36 is an area with a width of 70 mm on one side of adjacent rubber sheets, and an area with a width of 70 mm on one side where the rubber sheet overlaps the dam head 2 .

[0037] Furthermore, if Figure 6 As shown, when overlapping and connecting multiple rubber sheets, it is necessary to perform vulcanization and bonding treatment on the overlapping area 36 of two adjacent rubber sheets by a molding machine 7 to achieve the connection of multiple rubber sheets and obtain a complete rubber dam bag 3. Figure 3 The rubber dam bag 3 is shown after being integrally vulcanized and connected.

[0038] In addition, the overlapping area 36 of the rubber sheet and the dam head 2 is subjected to vulcanization bonding treatment by the molding machine 7, thereby achieving the connection between the rubber dam bag 3 and the dam head 2. Figure 3 As shown, the areas at both ends of the rubber dam bag 3 after the overall vulcanization connection are overlapping areas 36 between the rubber dam bag as a whole and the dam head 2 .

[0039] Rubber dam bag production process:

[0040] First, the upper aramid cloth 31 is placed in an automatic rubber-coated calender, and a rubber thin layer is hung on the upper and lower surfaces of the upper aramid cloth 31. At a suitable rubber roller position, the preheated outer rubber layer 33 is placed above the upper aramid cloth 31, and the aramid cloth is calendered to form an upper rubber sheet. Similarly, the lower aramid cloth 32 is placed in an automatic rubber-coated calender, and a rubber thin layer is hung on the upper and lower surfaces of the lower aramid cloth 32. At a suitable rubber roller position, the preheated inner rubber layer 34 is placed below the lower aramid cloth 32, and the lower aramid cloth 32 is calendered to form a lower rubber sheet. The prepared upper and lower rubber sheets are respectively wound on different rubber rollers for standby use.

[0041] Furthermore, the prepared film is placed in the vulcanizer 6 for vulcanization in the arrangement of the upper film on the top and the lower film on the bottom, and a 70mm wide overlap area 36 is reserved. The working pressure of the vulcanizer 6 should reach 4Mpa, which can greatly increase the density of the vulcanized rubber dam bag and the bonding ability of each layer of adhesive tape to ensure that the adhesive tape will not delaminate during use and ensure the service life of the rubber dam bag. The overlap area 36 is the area where two adjacent rubber sheets overlap each other on one side and the area where the rubber sheet overlaps each other on the side where the dam head 2 is connected.

[0042] Further, the overlapping areas of the two rubber sheets are overlapped and placed in the molding machine 7 for vulcanization and seaming. Similarly, the overlapping areas of the rubber sheet on the dam head 2 and the rubber sheet of the rubber dam bag 3 are overlapped and placed in the molding machine 7 for vulcanization and seaming.

[0043] Finally, the defects of the dam head and dam bag are repaired, and the appearance quality, finished product size and product performance are inspected before they can be shipped out of the factory.

[0044] The rubber dam made by the above process has rubber sheet joints that are not easy to break, the rubber sheet body structure is stronger, and has higher tear resistance, so it can be better suited for rivers with harsh environments.

[0045] The above description is only an illustrative specific implementation of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A tear-resistant rubber dam, characterized in that: The rubber dam comprises: a dam foundation (1) arranged transversely along a river channel, dam heads (2) being arranged at both ends of the dam foundation (1), a rubber dam bag (3) being connected and arranged between the two dam heads (2), the two ends of the rubber dam bag (3) being anchored to the dam foundation (1) along the river channel, respectively, to form a closed space between the dam heads (2) and the rubber dam bag (3); The dam foundation (1) is provided with a filling and discharging pipe (4) communicating with the interior of the rubber dam bag (3) and used for filling and discharging gas or liquid medium into and out of the rubber dam bag (3).

2. The tear-resistant rubber dam according to claim 1, characterized in that: A bottom gasket (5) is provided on the upper surface of the dam foundation (1), and the dam head (2) and the rubber dam bag (3) are anchored to the bottom gasket (5) and the dam foundation (1) by bolts.

3. The tear-resistant rubber dam according to claim 1, characterized in that: The rubber dam bag (3) is composed of a plurality of rubber sheets, wherein the rubber sheet is formed by bonding an upper rubber sheet and a lower rubber sheet.

4. The tear-resistant rubber dam according to claim 3, characterized in that: The upper rubber sheet comprises an upper aramid cloth (31) and an outer rubber layer (33), wherein the upper aramid cloth (31) is coated with rubber, and the outer rubber layer (33) is fixedly bonded to one side of the upper aramid cloth (31); The lower rubber sheet comprises a lower aramid cloth (32) and an inner rubber layer (34), wherein the lower aramid cloth (32) is coated with rubber, and the inner rubber layer (34) is fixedly bonded to one side of the lower aramid cloth (32).

5. The tear-resistant rubber dam according to claim 3 or 4, characterized in that: The upper film and the lower film are stacked and an interlayer (35) is arranged in between; The stacked upper rubber sheet and the lower rubber sheet are subjected to a vulcanization bonding process outside the overlapping area (36) by means of a vulcanizing machine (6).

6. The tear-resistant rubber dam according to claim 5, characterized in that: The overlapping area (36) is an area with a width of 70 mm on one side adjacent to the rubber sheet, and an area with a width of 70 mm on one side where the rubber sheet overlaps the dam head (2).

7. The tear-resistant rubber dam according to claim 6, characterized in that: Performing vulcanization bonding treatment on the overlapping area (36) of two adjacent rubber sheets after overlapping by a molding machine (7); The overlapping area (36) after the rubber sheet and the dam head (2) are overlapped is subjected to a vulcanization bonding treatment by a molding machine (7).

8. The tear-resistant rubber dam according to claim 4, characterized in that: The thickness of the outer rubber layer (33) is greater than or equal to 2.5 mm; The thickness of the inner rubber layer (34) is greater than or equal to 2 mm.

9. The tear-resistant rubber dam according to claim 5, characterized in that: The interlayer (35) has a thickness of 0.3-0.5 mm.

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