A hole protection device for a deformation monitoring point of a hydropower plant and a method of using the same

Abstract

The present application belongs to dam engineering monitoring device field, especially, relate to a kind of deformation monitoring point hole protection device of hydropower plant, by protection device main part and special key constitute, it is characterized in that: the special key is made of key ring arm, hollow tube and key tongue;The protection device main part middle part has a key entering pipe that is through up and down, and the protection device main body in the upper end of key entering pipe is equipped with a long hole-shaped keyhole and a key tongue cavity that can make key tongue spin, key tongue cavity is located just below keyhole, and the flexible valve inner tube is arranged in the key entering pipe;When special key is not inserted in flexible valve inner tube, all valves are in sealed closed state, and the sidewall of protection device main body is provided with corrugated plug;The present application has the beneficial effects of simple structure, convenient to use, firm installation, wear resistance, oil resistance, acid and alkali resistance, strong compression resistance and impact force etc.;The present application also discloses its use method.

Description

A hole protection device for deformation monitoring points in a hydropower plant and its application method Technical Field

[0001] This invention belongs to the field of dam engineering monitoring devices, and in particular relates to a hole protection device for deformation monitoring points in hydropower plants and its usage method. Background Technology

[0002] Deformation monitoring involves collecting data on the spatial and temporal changes of hydraulic structures or components in hydropower plants. This data is crucial for studying normal deformation patterns, predicting deformation trends, and analyzing and evaluating their safety profile. Monitoring points must be stable and undisturbed by external factors. However, hydropower plant deformation monitoring points are often located in the field, typically using a circular hole drilled in the ground or a section of steel pipe covered with a thick steel plate as a protective device.

[0003] Because these covers lack anti-theft measures, they are easily misused and susceptible to damage from external forces. The deformation monitoring points are also subject to external damage and interference. Furthermore, due to the poor sealing of their protection method, the deformation monitoring points inside the holes are easily affected by rainwater, oil, and acid and alkali corrosion, which increases the systematic error of the monitoring data and affects the accuracy and precision of the deformation of the building or structure, thus affecting the true trend of the building or structure's changes.

[0004] In the prior art, such as CN217325532U, a novel orifice protection device suitable for inclinometer holes on engineering slopes is disclosed. Installed at the orifice opening of the inclinometer hole, it is characterized by comprising: a protective sleeve surrounding the orifice opening to cover it; an orifice cover device for sealing the protective sleeve; the orifice cover device forming protection for the inclinometer hole from top to bottom inside the protective sleeve; a screw rod capable of rotational displacement is provided on the bottom surface of the orifice cover device; a screw cap is fixedly connected to the end of the screw rod; a pair of laterally extending, oppositely arranged limiting ears are provided on the inner wall of the protective sleeve; a ring accommodating the end of the screw rod is provided below one of the limiting ears; a keyhole is provided below the other limiting ear plate; the keyhole and the ring are positioned opposite each other; when the orifice cover device is rotated to a certain angle, the keyhole, screw rod, and ring are aligned in a straight line; the length of the screw rod exceeds the distance between the two limiting ears but is less than the distance between the ring and the keyhole.

[0005] The aforementioned existing technologies have the following drawbacks: 1. They are relatively complex in structure and have high costs; 2. They are inconvenient to use; 3. They have poor applicability to various application scenarios. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to disclose a hole protection device for deformation monitoring points in hydropower plants and its usage method, which is achieved through the following technical solution.

[0007] A hole protection device for deformation monitoring points in a hydropower plant, comprising a main body of the protection device and a special key, characterized in that: the special key is composed of a key ring arm, a hollow tube and a key tongue, the key ring arm is fixed to the upper end of the hollow tube and the key tongue is fixed to the side wall of the hollow tube;

[0008] The main body of the protective device has a key inlet tube that runs vertically through the middle. Inside the main body of the protective device at the upper end of the key inlet tube, there is a long keyhole that allows the key tongue to pass through and a key tongue cavity that allows the key tongue to be screwed in. The key tongue cavity is located directly below the keyhole, and the upper wall of the key tongue cavity communicates with the keyhole. The key inlet tube communicates with the keyhole and the key tongue cavity. A flexible valve inner tube is provided inside the key inlet tube. The outer wall of the flexible valve inner tube is tightly fitted with the inner wall of the key inlet tube. Multiple valves that can be opened and closed are provided inside the flexible valve inner tube from top to bottom. When no special key is inserted into the flexible valve inner tube, all valves are in a sealed closed state. The side wall of the main body of the protective device is provided with a corrugated plug.

[0009] The above-described device for protecting holes in deformation monitoring points of a hydropower plant is characterized in that: the main body of the device consists of an upper panel and a lower panel, an outer tube is fixed between the upper panel and the lower panel, a key inlet tube is located inside the outer tube, the upper end of the key inlet tube is connected to the upper side of the upper panel, the lower end of the key inlet tube is connected to the lower side of the lower panel, and a corrugated plug is located outside the outer tube.

[0010] The above-described device for protecting holes in deformation monitoring points of hydropower plants is characterized in that: the bottom of the lower panel is provided with multiple support arms.

[0011] The above-described device for protecting holes in deformation monitoring points of hydropower plants is characterized in that: a filler is provided between the key inlet pipe and the outer pipe.

[0012] The above-described device for protecting holes in deformation monitoring points at hydropower plants is characterized in that the upper panel is made of copper.

[0013] The above-described device for protecting holes in deformation monitoring points at hydropower plants is characterized in that the lower panel is made of steel.

[0014] The above-described device for protecting holes in deformation monitoring points at hydropower plants is characterized in that the corrugated plug material is polyurethane rubber.

[0015] The above-described device for protecting holes in deformation monitoring points at hydropower plants is characterized in that the flexible petal-shaped inner tube is made of silicone.

[0016] The above-described method for using the hole protection device for deformation monitoring points in a hydropower plant is characterized by the following steps:

[0017] Step 01: Installation of the hole protection device. Embed the main body of the protection device into the hole where the deformation monitoring point is located, so that the bellows plug is sealed and fitted with the inner wall of the hole. The support arm is supported at the bottom of the hole. At this time, the hole protection device and the hole are in a sealed connection state. If a special key is not used, when the hole protection device is pulled outward, due to the friction between the bellows plug and the inner wall of the hole and the negative pressure state inside the hole, it is difficult to remove the hole protection device in a negative pressure state under the action of atmospheric pressure.

[0018] Step 02: Remove the hole protection device. Insert the hollow tube of the special key into the hole through the key inlet tube. The hollow tube makes the air pressure inside the hole equal to the external atmospheric pressure. With the key tongue parallel to the keyhole, continue to insert the special key downwards. When the key tongue contacts the bottom of the key tongue cavity, turn the special key to let the key tongue enter the key tongue cavity. Pull the key ring arm upwards to remove the hole protection device.

[0019] Step 03: Separate the hole protection device from the special key. Turn the special key in the opposite direction until the key tongue is parallel to the keyhole. Pull the special key upward to separate the hole protection device from the special key.

[0020] The present invention has the following beneficial effects:

[0021] 1. The flexible, petal-shaped inner tube is closed when not in use, putting the entire hole under negative pressure, making it impossible to remove the protective device without a special key.

[0022] 2. The hole protection device can be accessed with a special key, making it convenient and labor-saving.

[0023] 3. By using support arms and bellows, external pressure and impact can be distributed to the inner wall and bottom of the hole, thereby enhancing resistance to external forces.

[0024] 4. The corrugated plug made of polyurethane rubber fits tightly with the hole protector to achieve a seal, preventing water, oil, sand, dust and other substances from entering the hole and damaging the monitoring point through corrosion.

[0025] 5. Bellows made of polyurethane rubber are wear-resistant, oil-resistant, and acid and alkali-resistant.

[0026] 6. The polyurethane rubber bellows and silicone flexible flap inner tube are replaceable, reducing the operation and maintenance costs of the protection device.

[0027] 7. Polyurethane rubber bellows has a certain degree of elasticity and is more adaptable to non-standard hole shapes.

[0028] 8. The cavity of the protection device can be filled with lightweight filler, which reduces the cost of the protection device, and the lightweight nature makes it easy to operate and use. Attached Figure Description

[0029] Figure 1 is a three-dimensional structural diagram of Example 1.

[0030] Figure 2 is a cross-sectional view of the top panel of Embodiment 1.

[0031] Figure 3 is a cross-sectional view of the special key of Embodiment 1.

[0032] Figure 4 is a partial cross-sectional view of the main body of the key-opening protection device in Embodiment 2.

[0033] In the diagram: 1. Top panel, 2. Bottom panel, 3. Support arm, 4. Outer tube, 5. Key entry tube, 6. Bellows plug, 7. Flexible valve inner tube, 8. Filler, 9. Key ring arm, 10. Hollow tube, 11. Key tongue, 12. Keyhole, 13. Inner wall of the hole, 14. Detection point, 121. Key tongue cavity, 122. Upper connecting hole. Detailed Implementation Example 1

[0034] As shown in Figures 1 to 3, a hole protection device for deformation monitoring points in a hydropower plant comprises a main body and a special key. The special key consists of a key ring arm 9, a hollow tube 10, and a key tongue 11. The key ring arm 9 is fixed to the upper end of the hollow tube 10, and the key tongue 11 is fixed to the side wall of the hollow tube 10. The main body of the protection device has an upper panel 1 and a lower panel 2. An outer tube 4 is fixed between the upper panel 1 and the lower panel 2. Inside the outer tube 4, a key entry tube 5 is provided in the middle of the upper panel 1 and the lower panel 2. The upper end of the key entry tube 5 communicates with the upper side of the upper panel 1, and the lower end of the key entry tube 5 communicates with the lower side of the lower panel 2. The upper panel 1 at the upper end of the key entry tube 5 has an elongated hole through which the key tongue 11 can pass. The keyhole 12 and the key tongue cavity 121 that allows the key tongue 11 to be screwed in are located directly below the keyhole 12. The upper wall of the key tongue cavity 121 is connected to the keyhole 12. The key entry tube (5) is connected to the keyhole (12) and the key tongue cavity (121). The bottom of the lower panel 2 is provided with multiple support arms 3. The key entry tube 5 is provided with a flexible valve inner tube 7. The outer wall of the flexible valve inner tube 7 is tightly fitted with the inner wall of the key entry tube 5. The flexible valve inner tube 7 is provided with multiple valves that can be opened and closed from top to bottom. A filler 8 is provided between the key entry tube 5 and the outer tube 4. The side wall of the outer tube 4 is provided with a corrugated plug 6. When no special key is inserted into the flexible valve inner tube 7, all valves are in a sealed closed state.

[0035] The above-described device for protecting holes in deformation monitoring points of hydropower plants is characterized in that the upper panel 1 is made of copper.

[0036] The above-described device for protecting holes in deformation monitoring points of hydropower plants is characterized in that the lower panel 2 is made of steel.

[0037] The above-described device for protecting holes in deformation monitoring points of hydropower plants is characterized in that the corrugated plug 6 is made of polyurethane rubber.

[0038] The above-described device for protecting holes in deformation monitoring points at hydropower plants is characterized in that the flexible, petal-shaped inner tube is made of silicone. Example 2

[0039] Please refer to Figure 4 and Figures 1 to 3. A method for using the hole protection device for deformation monitoring points in a hydropower plant according to Embodiment 1 is characterized by the following steps:

[0040] Step 01: Installation of the hole protection device. Embed the main body of the protection device into the hole where the deformation monitoring point is located, so that the bellows plug 6 is sealed and fitted with the inner wall 13 of the hole, and the support arm 3 is supported at the bottom of the hole. At this time, the hole protection device is in a sealed connection with the hole. If no special key is used, when the hole protection device is pulled outward, due to the friction between the bellows plug 6 and the inner wall 13 of the hole and the negative pressure state inside the hole, it is difficult to remove the hole protection device in a negative pressure state under the action of atmospheric pressure.

[0041] Step 02: Remove the hole protection device. Insert the hollow tube 10 of the special key into the hole through the key inlet tube 5. The hollow tube 10 makes the air pressure inside the hole equal to the external atmospheric pressure. With the key tongue 11 parallel to the keyhole 12, continue to insert the special key downwards. When the key tongue 11 contacts the bottom of the key tongue cavity 121, turn the special key to let the key tongue 11 enter the key tongue cavity 121. Pull the key ring arm 9 upwards to remove the hole protection device.

[0042] Step 03: Separate the hole protection device from the special key. Turn the special key in the opposite direction until the key tongue 11 and the keyhole 12 are in a parallel position. Pull the special key upward to separate the hole protection device from the special key.

[0043] The present invention has the following beneficial effects:

[0044] 1. The flexible, petal-shaped inner tube is closed when not in use, putting the entire hole under negative pressure, making it impossible to remove the protective device without a special key.

[0045] 2. The hole protection device can be accessed with a special key, making it convenient and labor-saving.

[0046] 3. By using support arms and bellows, external pressure and impact can be distributed to the inner wall and bottom of the hole, thereby enhancing resistance to external forces.

[0047] 4. The corrugated plug made of polyurethane rubber fits tightly with the hole protector to achieve a seal, preventing water, oil, sand, dust and other substances from entering the hole and damaging the monitoring point through corrosion.

[0048] 5. Bellows made of polyurethane rubber are wear-resistant, oil-resistant, and acid and alkali-resistant.

[0049] 6. The polyurethane rubber bellows and silicone flexible flap inner tube are replaceable, reducing the operation and maintenance costs of the protection device.

[0050] 7. Polyurethane rubber bellows has a certain degree of elasticity and is more adaptable to non-standard hole shapes.

[0051] 8. The cavity of the protection device can be filled with lightweight filler, which reduces the cost of the protection device, and the lightweight nature makes it easy to operate and use.

[0052] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A hole protection device for deformation monitoring points in a hydropower plant, comprising a main body of the protection device and a special key, characterized in that: The special key consists of a key ring arm (9), a hollow tube (10), and a key tongue (11). The key ring arm (9) is fixed to the upper end of the hollow tube (10), and the key tongue (11) is fixed to the side wall of the hollow tube (10). The main body of the protective device has a key entry tube (5) that runs vertically through the middle. Inside the main body of the protective device at the upper end of the key entry tube (5), there is a long hole (12) through which the key tongue (11) can pass and a key tongue cavity (121) through which the key tongue (11) can be screwed in. The key tongue cavity (121) is located directly below the key hole (12), and the upper wall of the key tongue cavity (121) communicates with the key hole (12). The key entry tube (5) communicates with the key hole (12) and the key tongue cavity (121). The inlet tube (5) is equipped with a flexible valve inner tube (7). The outer wall of the flexible valve inner tube (7) is tightly fitted with the inner wall of the key inlet tube (5). The flexible valve inner tube (7) has multiple valves that can be opened and closed from top to bottom. When no special key is inserted into the flexible valve inner tube (7), all valves are in a sealed closed state. The side wall of the main body of the protective device is equipped with a bellows plug (6). The main body of the protective device is composed of an upper panel (1) and a lower panel (2). An outer tube (4) is fixed between the upper panel (1) and the lower panel (2). The key inlet tube (5) is located inside the outer tube (4). The upper end of the key inlet tube (5) is connected to the upper side of the upper panel (1), and the lower end of the key inlet tube (5) is connected to the lower side of the lower panel (2). The bellows plug (6) is located outside the outer tube (4).

2. The hole protection device for deformation monitoring points in a hydropower plant according to claim 1, characterized in that: The bottom of the lower plate (2) is provided with multiple support arms (3).

3. The hole protection device for deformation monitoring points in a hydropower plant according to claim 2, characterized in that: A filler (8) is provided between the key entry tube (5) and the outer tube (4).

4. The hole protection device for deformation monitoring points in a hydropower plant according to claim 3, characterized in that: The material of the top panel (1) is copper.

5. A hole protection device for deformation monitoring points in a hydropower plant according to claim 4, characterized in that: The material of the bottom plate (2) is steel.

6. The hole protection device for deformation monitoring points in a hydropower plant according to claim 5, characterized in that: The bellows plug (6) is made of polyurethane rubber.

7. A hole protection device for deformation monitoring points in a hydropower plant according to claim 6, characterized in that: The inner cannula of the flexible valve is made of silicone.

8. A method of using the hole protection device for deformation monitoring points in a hydropower plant as described in claim 7, characterized in that... The steps are as follows: Step 01: Installation of the hole protection device. The main body of the protection device is embedded into the hole where the deformation monitoring point is located, so that the bellows plug (6) is sealed and embedded with the inner wall (13) of the hole, and the support arm (3) is supported at the bottom of the hole. At this time, the hole protection device and the hole are in a sealed connection state; Step 02: Removal of the hole protection device. The hollow tube (10) of the special key is inserted into the hole through the key inlet tube (5). The hollow tube (10) makes the air pressure inside the hole consistent with the external atmospheric pressure. The key tongue (1) is inserted into the hole. 1) Continue inserting the special key downwards while keeping it parallel to the keyhole (12). When the key tongue (11) contacts the bottom of the key tongue cavity (121), turn the special key to allow the key tongue (11) to enter the key tongue cavity (121). Pull the key ring arm (9) upwards to remove the hole protection device. Step 03: Separate the hole protection device from the special key. Turn the special key in the opposite direction until the key tongue (11) is parallel to the keyhole (12). Pull the special key upwards to separate the hole protection device from the special key.

Images