A gravity-type reverse support leak-proof device

Abstract

This utility model provides a gravity-type reverse support leak-proof device, relating to the field of water conservancy and hydropower engineering. Specifically, it is a gravity-type reverse support leak-proof device that improves the water-blocking effect of a gate. It includes a connecting shaft, one end of which is connected to the gate via a bearing, and the other end is placed in a groove in a plumb bob. The upper end of the plumb bob is connected to a gravity groove via a pin shaft. The gravity groove is connected to the gate via the plumb bob and a plumb block. This utility model uses the wedge-shaped contact surface between the connecting shaft and the plumb bob to transmit the vertical effect of the adjustable counterweight inside the gravity groove and convert it into a thrust in the direction of water flow, thereby improving the gate's water-blocking effect. By adjusting the weight of the counterweight and the length of the connecting shaft, the device can meet more water-blocking requirements.

Description

Technical Field

[0001] This utility model relates to the field of small and medium-sized gates in water conservancy and hydropower projects, specifically to a gravity-type reverse support anti-leakage device. Background Technology

[0002] In the field of water conservancy, hydropower and water transport engineering, vertical sliding gates are widely used due to their simple structure, convenient operation, minimal impact on water flow and low opening and closing force requirements, especially during the maintenance of buildings or equipment.

[0003] These types of gates are typically opened and closed under still water conditions. Since they are related to the working conditions and safety of maintenance personnel, sufficient attention should be paid to the structural strength and water-stopping facilities of the maintenance gates.

[0004] For submerged planar gates, in order to ensure good water-blocking effect, top water-stop, side water-stop and bottom water-stop devices must be installed respectively.

[0005] In still water, the opening and closing force of a gate largely depends on its own weight. When the gate's weight is small, its closing force is also small. In addition, if the bottom sealing rubber is not compressed enough, the bottom of the gate will be uneven, causing it to shift laterally or tilt, resulting in poor water-blocking effect.

[0006] When existing gates leak, the limited space at the orifice prevents the direct application of support force in the direction of water flow to achieve the desired water-blocking effect. Existing gates may also be lightweight due to their small orifice size. To address these shortcomings, it is necessary to provide a gravity-based reverse support leak-proof device that can improve the water-blocking effect of gates. Utility Model Content

[0007] The present invention aims to solve the problems of poor water blocking effect and easy leakage of existing medium and small sluice gates.

[0008] To solve the above problems, this application provides the following technical solution:

[0009] A gravity-type reverse-support leak-proof device includes a base sill, with gate posts symmetrically fixed at both ends of the base sill. Each gate post has a first groove, and a gate is placed in the first groove of each gate post.

[0010] The inner walls of the first and second connecting holes on each side of the gate slide against the outer wall of the plumb rod, and each plumb rod is provided with a trapezoidal groove and a semi-open groove.

[0011] The gate has multiple first windows at the top of the side wall facing away from the water, and multiple second windows at the bottom of the side wall facing away from the water.

[0012] The first sidewall of the gate is also provided with a plurality of first connecting holes, and the second sidewall of the gate is also provided with a plurality of second connecting holes.

[0013] The outer wall of the gate is also provided with multiple shaft holes. Each shaft hole has a bearing fixedly installed on its inner wall. The inner wall of each bearing slides in contact with the outer wall of the connecting shaft. One end of each connecting shaft faces the first groove.

[0014] The inclined bottom wall of each connecting shaft on the top side of the gate slides into contact with the inclined bottom wall of the trapezoidal groove of each plumb line.

[0015] The inclined bottom wall of each connecting shaft on one side of the bottom of the gate slides into contact with the inclined bottom wall of the semi-open groove of each plumb line.

[0016] The top of the gate is also fixedly connected to a pair of parallel support plates, each of which has a hole.

[0017] Each plumb rod has a fixedly connected insert at its top. Each insert has a hollow internal structure. Each insert is inserted into the top of each plumb rod. Each insert has a through hole in its side wall. Each plumb rod also has a through hole of the same size in its top. A pin is installed inside the through holes of the plumb rod and the insert.

[0018] The insert is fixedly connected to the bottom sidewall of the outer side of the second groove, and the bottom sidewall of the inner side of the second groove is also fixedly connected to the hanging rod.

[0019] The bottom outer wall of the second groove is also fixedly connected to two parallel vertical blocks. Both vertical blocks are provided with pin holes. The pin holes of the two vertical blocks are fixedly connected by a protective shaft, which is installed inside the two plate holes.

[0020] Preferably, multiple elastically deformable rubber frames are fixedly installed on the side wall of the gate facing the water.

[0021] Preferably, the sill is fixedly equipped with two symmetrical gate columns, and each pair of gate columns is symmetrically and fixedly connected to both sides of the sill.

[0022] Preferably, the gate has a multi-layered hollow structure, with the gate having a first layer of sidewalls, a second layer of sidewalls, and a third layer of sidewalls from top to bottom, and the bottom side of the gate that contacts the sill has no bottom wall.

[0023] Preferably, the bottom sidewall of the gate is equipped with a sealing strip, which makes the gate fit against the upper sidewall of the connecting sill, and the sill is fixedly installed on the riverbed.

[0024] Preferably, the top third sidewall of the gate is also provided with multiple through holes. When the second groove presses the plumb rod down by gravity, the plumb rod moves downward. The through holes are used to smoothly pass through the bottom of the plumb rod, and the diameter of the through holes is larger than that of the first connecting hole.

[0025] Preferably, the first connecting hole and the second connecting hole have the same diameter.

[0026] Preferably, the first sidewall of the gate is provided with two first connecting holes, and the second sidewall of the gate is provided with two second connecting holes.

[0027] Preferably, the inclined bottom walls of the two connecting shafts on one side of the top of the gate slide against the inclined bottom walls of the trapezoidal grooves of the two vertical rods.

[0028] Preferably, the inclined bottom walls of the two connecting shafts on one side of the bottom of the gate slide and contact the inclined bottom walls of the semi-open grooves of the two vertical rods.

[0029] Preferably, the pin is used to securely connect the plumb bob and the insert.

[0030] Preferably, the top of the boom is provided with a lifting hole, which is used by the crane to use a chain to lift the second groove, thereby lifting the gate to open and release water.

[0031] Preferably, two vertical rods are fixedly connected to the bottom wall of the outer side of the second groove.

[0032] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0033] 1. Multiple horizontally movable connecting shafts are arranged on one side of the gate, specifically four connecting shafts on the non-water-blocking side. An adjustable counterweight gravity groove is arranged at the upper end of the gate, allowing its weight to be adjusted according to actual needs. This gravity groove is connected by a plumb line at the lower end of a pin shaft, and the inner wall of the gravity groove is fixedly connected to a lifting rod. Two vertically movable plumb lines are arranged at the lower end of the counterweight, with wedge-shaped contact surfaces between the plumb lines and the connecting shafts. The vertical effect of the counterweight is transmitted through the wedge-shaped surfaces and converted into a horizontal thrust of the water flow, causing the connecting shafts to move laterally. The movement of the connecting shafts interacts with the sidewall of the first groove, thereby ensuring a tight fit between the gate and the first groove to stop the water flow.

[0034] 2. This device increases the weight of the gate. The counterweight of the gravity trough can increase the weight of the gate, and the size of the counterweight can be accurately calculated according to the water blocking conditions. Therefore, the gate can meet more water blocking needs.

[0035] 3. The force conversion mechanism designed in this device can convert the gravity perpendicular to the ground into a force acting in the direction of water flow, which not only improves the water-blocking effect of the gate, but also enhances the stability and reliability of the entire system.

[0036] 4. This device connects the gravity groove and the plumb line via a pin shaft, ensuring convenient disassembly and ease of operation. Furthermore, its simple structural design reduces maintenance complexity and cost.

[0037] 5. Gravity-type reverse support leak-proof device improves the water-blocking effect of small and medium-sized gates. By adding counterweights to the gravity groove, the overall weight of the gate is increased, and the vertical weight-adding effect is transformed into a horizontal effect along the water flow direction. This effectively prevents lateral movement or tilting caused by unevenness at the bottom of the gate. While ensuring the water-blocking effect, the size of the counterweight can be flexibly adjusted according to different gate sizes and specific water-blocking conditions. Precise counterweight configuration not only optimizes the gate's closing force but also ensures its stability and sealing under various operating conditions, greatly improving the operational safety and reliability of vertical sliding gates. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the gate column and the first groove.

[0039] Figure 2 A top view of the structure for installing the gravity groove and gate on the gate column and the first groove.

[0040] Figure 3 This is a schematic diagram of the internal structure of a gravity-type reverse support leak-proof device after the bottom sill and one side gate column have been removed.

[0041] Figure 4 for Figure 3 A schematic diagram of the right-side structure.

[0042] Figure 5 for Figure 3 A schematic diagram of the rear view structure.

[0043] Figure 6 for Figure 3 A schematic diagram of the structure from the front rear view.

[0044] Figure 7 for Figure 3 A schematic diagram of the structure viewed from below along the bottom of the gate.

[0045] Figure 8 for Figure 3 A schematic diagram of the cross-sectional structure along the side wall of the gate column.

[0046] Figure 9 for Figure 3 A schematic diagram of the structure from the right side of the cross section along the line of symmetry of the plumb line.

[0047] Figure 10 for Figure 3 A schematic diagram of the structure after removing the vertical blocks following the division along the outer wall of the bottom of the gravity channel.

[0048] Figure 11 for Figure 10 A schematic diagram of the segmented structure after the vertical bar is removed.

[0049] Figure 12 for Figure 11 A schematic diagram of the structure viewed from below.

[0050] Figure 13 for Figure 11 A top-view structural diagram.

[0051] Figure 14 for Figure 3 A schematic diagram of the overall structure after the gate column has been removed.

[0052] Figure 15 for Figure 14 A frontal view of the structure.

[0053] Figure 16 for Figure 14 A schematic diagram of the rear view structure.

[0054] Figure 17 for Figure 14 A schematic diagram of the connection structure between the gravity groove and the plumb line after the gate is removed.

[0055] Figure 18 for Figure 17 A frontal view of the structure.

[0056] Reference numerals: 1. Hanging rod; 2. Gravity groove; 201. Second groove; 202. Vertical rod; 203. Connecting shaft; 204. Pin shaft; 2041. Socket; 205. Bearing; 206. Trapezoidal groove; 2061. Semi-open groove; 207. Support plate; 2071. Plate hole; 208. Protective shaft; 209. Vertical block; 3. Gate; 301. Shaft hole; 302. Rubber frame; 303. First window; 3031. Second window; 304. First connecting hole; 3041. Second connecting hole; 4. Through hole; 5. Gate column; 6. First groove; 7. Bottom sill. Detailed Implementation

[0057] It should be understood that the terms "each side," "inner wall," "outer wall," "back to back," "top," "one side," "bottom," "inner," "internal," "side wall," "outer side," "inner side," and "bottom wall," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Unless otherwise specified, the "fixed connection" described in this application refers to conventional methods such as welding and bonding.

[0058] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "equipped with," "featured," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication between two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] Example 1

[0060] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings.

[0061] Please see Figures 1-18 This embodiment provides a gravity-type reverse support leak-proof device.

[0062] A gravity-type reverse support leak-proof device includes a bottom sill 7, with gate posts 5 symmetrically fixed at both ends of the bottom sill 7. Each gate post 5 has a first groove 6, and a gate 3 is placed in the first groove 6 of each gate post 5.

[0063] The inner walls of the first connecting hole 304 and the second connecting hole 3041 on each side of the gate 3 slide against the outer wall of the plumb rod 202. Each plumb rod 202 is provided with a trapezoidal groove 206 and a semi-open groove 2061.

[0064] The top of the side wall of the gate 3 facing away from the water is provided with multiple first windows 303, and the bottom of the side wall of the gate 3 facing away from the water is provided with multiple second windows 3031.

[0065] The first sidewall of the gate 3 is also provided with a plurality of first connecting holes 304, and the second sidewall of the gate 3 is also provided with a plurality of second connecting holes 3041.

[0066] The outer wall of the gate 3 is also provided with multiple shaft holes 301. Each shaft hole 301 has a bearing 205 fixedly installed on its inner wall. The inner wall of each bearing 205 slides in contact with the outer wall of the connecting shaft 203. One end of each connecting shaft 203 faces the side of the first groove 6.

[0067] The inclined bottom wall of each connecting shaft 203 on the top side of the gate 3 slides into contact with the inclined bottom wall of the trapezoidal groove 206 of each vertical rod 202.

[0068] The inclined bottom wall of each connecting shaft 203 on one side of the bottom of the gate 3 slides into contact with the inclined bottom wall of the semi-open groove 2061 of each vertical rod 202.

[0069] A pair of parallel support plates 207 are also fixedly connected to the top of the gate 3, and each support plate 207 has a plate hole 2071.

[0070] Each plumb rod 202 has a fixedly connected insert 2041 at its top. Each insert 2041 has a hollow internal structure and is inserted into the top of each plumb rod 202. Each insert 2041 has a through hole through its side wall, and each plumb rod 202 also has a through hole of the same size at its top. Insert pins 204 are installed inside the through holes of the plumb rod 202 and insert 2041.

[0071] The insert 2041 is fixedly connected to the bottom side wall of the outer side of the second groove 201, and the bottom side wall of the inner side of the second groove 201 is also fixedly connected to the hanging rod 1.

[0072] Two parallel vertical blocks 209 are also fixedly connected to the bottom outer wall of the second groove 201. Both vertical blocks 209 are provided with pin holes. The pin holes of the two vertical blocks 209 are fixedly connected by a protective shaft 208. The protective shaft 208 is installed inside the two plate holes 2071.

[0073] Preferably, the center of each first connecting hole 304 and second connecting hole 3041 is aligned with the center of the through hole 4.

[0074] Preferably, the rubber frame 302 was purchased from Sanmenxia Jianghe Hydropower Rubber Products Co., Ltd., model SF6674.

[0075] Preferably, the sealing strip is purchased from Sanmenxia Jianghe Hydropower Rubber Products Co., Ltd., model SF6474.

[0076] Preferably, multiple elastically deformable rubber frames 302 are fixedly installed on the water-facing side wall of the gate 3. The two sides of the multiple rubber frames 302 are respectively attached to the inner wall of the first groove 6 of the gate column 5 at both ends.

[0077] Preferably, the bottom sill 7 is fixedly equipped with two symmetrical gate pillars 5, and each pair of gate pillars 5 is symmetrically and fixedly connected to both sides of the bottom sill 7.

[0078] Preferably, the gate 3 has a multi-layer hollow structure, with the gate 3 consisting of a first layer of sidewalls, a second layer of sidewalls, and a third layer of sidewalls from top to bottom, and the side of the gate 3 that contacts the bottom sill 7 has no bottom wall.

[0079] Preferably, the bottom side wall of the gate 3 is equipped with a sealing strip, which makes the gate 3 fit against the upper side wall of the connecting sill 7, and the sill 7 is fixedly installed on the riverbed of the river.

[0080] Preferably, the top third layer sidewall of the gate 3 is also provided with multiple through holes 4. When the second groove 201 presses down on the plumb rod 202 by gravity, the plumb rod 202 moves downward. The through holes 4 are used to smoothly pass through the bottom of the plumb rod 202. The diameter of the through holes 4 is larger than that of the first connecting hole 304.

[0081] Preferably, the first connecting hole 304 and the second connecting hole 3041 have the same diameter.

[0082] Preferably, the first sidewall of the gate 3 is further provided with two first connecting holes 304, and the second sidewall of the gate 3 is further provided with two second connecting holes 3041.

[0083] Preferably, the inclined bottom walls of the two connecting shafts 203 on the top side of the gate 3 slide and contact the inclined bottom walls of the trapezoidal grooves 206 of the two vertical rods 202.

[0084] Preferably, the inclined bottom walls of the two connecting shafts 203 on one side of the bottom of the gate 3 slide and contact the inclined bottom walls of the semi-open grooves 2061 of the two vertical rods 202.

[0085] Preferably, the pin 204 is used to fix the vertical rod 202 and the insert 2041.

[0086] Preferably, the top of the boom 1 is provided with a lifting hole, which is used by the crane to use a chain to lift the second groove 201, thereby lifting the gate 3 to open the gate and release water.

[0087] Preferably, two vertical rods 202 are fixedly connected to the outer bottom wall of the second groove 201.

[0088] The crane can be purchased directly from the existing market. The crane is existing technology and is not an improvement of this invention.

[0089] Preferably, in the direction perpendicular to the water surface, the maximum downward displacement height of the second groove 201 is protected by the height limit of the plate hole 2071 of the protective shaft 208 and the receiving plate 207. This prevents the plumb rod 202 from falling too much when the weight of the second groove 201 is too great, and prevents the inclined bottom wall of the connecting shaft 203 from being squeezed upward from the inclined bottom wall of the trapezoidal groove 206 and the semi-open groove 2061. This also prevents the inclined bottom wall of the connecting shaft 203 from being crushed or damaged when the force contact area between each connecting shaft 203 and the trapezoidal groove 206 and the semi-open groove 2061 is too small.

[0090] The working principle of this device is as follows:

[0091] When gate 3 operates alone, its insufficient weight results in inadequate closing force. Furthermore, the sealing strip fixed to the bottom of the sill 7 is not fully compressed due to the insufficient weight of gate 3. The uneven bottom of the sealing strip at the bottom of gate 3 causes lateral shifting or tilting of the gate's sidewalls, preventing it from properly fitting against the inner wall of the first groove 6. This leads to poor water-blocking performance and leakage.

[0092] The gate 3 was optimized and improved by arranging a gravity-type reverse support structure, such as gravity groove 2.

[0093] Gravity trough 2 consists of a rectangular box and objects added inside. After calculating the required counterweight, objects of different densities, such as metal blocks, concrete blocks or other suitable materials, can be added to the rectangular box of gravity trough 2 to precisely adjust the size of the counterweight and achieve the best water-stopping effect.

[0094] The upper end of the plumb rod 202 is hinged to the second groove 201 via a pin 204 to ensure smooth force transmission between the second groove 201 and the plumb rod 202, and to facilitate disassembly and maintenance.

[0095] The lower end of the vertical rod 202 has a trapezoidal groove 206 and a semi-open groove 2061. The inclined bottom walls of the trapezoidal groove 206 and the semi-open groove 2061 cooperate with the inclined bottom wall of one end of the connecting shaft 203 to achieve effective force conversion. Figure 9 As shown, the included angle α of the wedge-shaped surface is the angle α between the inclined bottom wall of one end of the connecting shaft 2.3 and the horizontal plane, and α is 45°~75°. If the included angle α is too small, it will not be conducive to the conversion of gravity into horizontal force in the second groove 201. If the included angle α is too large, the inclined bottom wall needs to be lengthened, which will easily wear down the inclined bottom wall of one end of the connecting shaft 203.

[0096] When the second groove 201 presses against the connecting shaft 203, the left end of the connecting shaft 203 contacts the first groove 6, and the right end of the inclined bottom wall of each connecting shaft 203 respectively engages with the wedge-shaped surface in the inclined bottom wall of the trapezoidal groove 206 of the vertical rod 202 and the semi-open groove 2061.

[0097] When the device is operating normally, such as Figure 1 As shown, the gravity groove 2 moves downwards horizontally, driving the plumb line 202 downwards synchronously. At this time, the weight of the counterweight filled in the gravity groove 2 is transmitted through the wedge-shaped surfaces in the trapezoidal groove 206 and the semi-open groove 2061 of the plumb line 202 and converted into a horizontal thrust in the direction of water flow, causing the connecting shaft 203 to undergo lateral displacement. The connecting shaft 203 exerts a squeezing effect on the first groove 6. According to Newton's third law, this will generate an equal and opposite reaction force, causing the gate 3 to move towards the side facing away from the water, and towards the rubber frame 302. This allows the rubber frame 302 to fit tightly against the first groove 6 of the gate column 5, effectively preventing leakage.

[0098] Depend on Figure 9It is evident that the connecting shaft 203 plays a crucial role in the entire operation of the device. When the vertical force applied by the gravity tank 2 is transmitted through the vertical rod 202 below it to the wedge-shaped surface of the inclined bottom wall of the trapezoidal groove 206 and the semi-open groove 2061, the design of the wedge-shaped surface decomposes part of the vertical gravity of the gravity tank 2 into a horizontal component, which is then transformed into a thrust along the water flow direction, thus achieving an effective conversion of force from the vertical to the horizontal direction. The included angle α of the wedge-shaped surface is one of the key parameters affecting the force transmission effect, ensuring optimal force transmission efficiency under different operating conditions.

[0099] like Figure 3 Four horizontally movable connecting shafts 203 and two vertical rods 202 passing through the gate 3 are arranged on the backwater side of the gate 3. The connecting shafts 203 are connected to the gate 3 through bearings 205, and the vertical rods 202 are connected to the insert cylinder 2041 at the lower end of the gravity groove 2 through pin shafts 204.

[0100] A schematic diagram of the assembly relationship between the connecting shaft 203 and the vertical rod 202, as shown below. Figures 8-9 As shown.

[0101] The force conversion mechanism introduced in this invention, through a wedge-shaped surface combination structure of gravity groove 2, vertical rod 202, and connecting shaft 203, effectively converts vertical force into horizontal force, successfully solving the problem that existing gates are difficult to directly apply horizontal support force when leakage occurs, significantly improving the gate's water-blocking effect and safety. This innovative design not only improves the operational safety and reliability of vertical lifting gates but also provides a reference for related research in the field of water conservancy engineering.

[0102] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A gravity reverse thrust water leakage prevention device comprising a sill (7), characterized in that, The bottom sill (7) is symmetrically fixed with gate pillars (5) at both ends. Each gate pillar (5) is provided with a first groove (6), and a gate (3) is placed in the first groove (6) of each gate pillar (5). The inner walls of the first connecting hole (304) and the second connecting hole (3041) on each side of the gate (3) slide against the outer wall of the vertical rod (202), and each vertical rod (202) is provided with a trapezoidal groove (206) and a semi-open groove (2061).

2. A gravity type reverse support water leakage preventing device according to claim 1, characterized in that, The gate (3) has multiple first windows (303) on the top of the side wall facing away from the water, and multiple second windows (3031) on the bottom of the side wall facing away from the water.

3. A gravity type reverse support water leakage preventing device according to claim 1, characterized in that, The first sidewall of the gate (3) is also provided with a plurality of first connecting holes (304), and the second sidewall of the gate (3) is also provided with a plurality of second connecting holes (3041).

4. The gravity-type reverse support leak-proof device according to claim 1, characterized in that, The outer wall of the gate (3) is also provided with multiple shaft holes (301), and a bearing (205) is fixedly installed on the inner wall of each shaft hole (301). The inner wall of each bearing (205) slides in contact with the outer wall of the connecting shaft (203), and one end of each connecting shaft (203) faces the side of the first groove (6).

5. A gravity-type reverse support leak-proof device according to claim 1, characterized in that, The inclined bottom wall of each connecting shaft (203) on the top side of the gate (3) slides into contact with the inclined bottom wall of the trapezoidal groove (206) of each vertical rod (202).

6. The gravity-type reverse support leak-proof device according to claim 1, characterized in that, The inclined bottom wall of each connecting shaft (203) on the bottom side of the gate (3) slides in contact with the inclined bottom wall of the semi-open groove (2061) of each vertical rod (202).

7. A gravity-type reverse support leak-proof device according to claim 1, characterized in that, The top of the gate (3) is also fixedly connected to a pair of parallel support plates (207), each support plate (207) having a plate hole (2071).

8. A gravity-type reverse support leak-proof device according to claim 1, characterized in that, Each plumb rod (202) has a fixedly connected insert (2041) at its top. Each insert (2041) has a hollow internal structure. Each insert (2041) is inserted into the top of each plumb rod (202). Each insert (2041) has a through hole through its side wall. Each plumb rod (202) also has a through hole of the same size through its top. The through holes of the plumb rod (202) and the insert (2041) are fitted with pins (204).

9. A gravity-type reverse support leak-proof device according to claim 8, characterized in that, The insert (2041) is fixedly connected to the bottom sidewall of the outer side of the second groove (201), and the bottom sidewall of the inner side of the second groove (201) is also fixedly connected to the hanging rod (1).

10. A gravity-type reverse support leak-proof device according to claim 9, characterized in that, The bottom outer wall of the second groove (201) is also fixedly connected to two parallel vertical blocks (209). Both vertical blocks (209) are provided with pin holes. The pin holes of the two vertical blocks (209) are fixedly connected by a protective shaft (208). The protective shaft (208) is installed inside the two plate holes (2071).

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