A pre-buried pipe structure for a borehole or pipe well with a leak-proof belt

Abstract

The present invention discloses a pre-buried pipe fitting structure for a borehole or pipe well with a leak-proof belt, comprising a pre-buried pipe fitting, a support plate, a leak-proof belt, an inlet pipe, an exhaust pipe, an inlet valve, and an exhaust valve. The support plate is disposed at the bottom of the pre-buried pipe fitting and fixedly connected to the pre-buried pipe fitting. The leak-proof belt is an elastic air bag disposed on the support plate and sleeved over the pre-buried pipe fitting. The inlet pipe and the exhaust pipe are both connected to the leak-proof belt. The lower end of the inlet pipe is connected to the leak-proof belt, and the upper end extends outside the borehole or pipe well and is connected to a fluid pressurizing device. The inlet pipe is provided with an inlet valve. The lower end of the exhaust pipe is connected to the leak-proof belt, and the upper end extends outside the borehole or pipe well and is connected to the atmosphere. The exhaust pipe is provided with an exhaust valve. The exhaust valve opens during the filling process of the leak-proof belt to discharge air from the leak-proof belt. The exhaust valve closes when the leak-proof belt is full. The present invention reliably seals the upper portion of the borehole or pipe well, effectively ensuring the quality of drilling grouting.

Description

Technical Field

[0001] The invention relates to an embedded pipe fitting structure, in particular to a pre-embedded pipe fitting structure for a borehole or a pipe well with a leak-proof belt. Background Art

[0002] In water conservancy projects, boreholes and pipe wells that penetrate deep into building foundations or underground are often encountered. Most of these boreholes and pipe wells require the installation of fixed pipe fittings at the top to seal the hole or wellhead and support related facilities. For example, a hole sealer is required at the top of a borehole used for grouting to prevent slurry from escaping and to secure the grouting pipe in the hole. This requires first burying fixed pipe fittings at the top of the borehole and then installing the hole sealer. The top of the pipe well for a submersible deep well pump requires buried pipe fittings and a support cover to secure and support the pump's water pipe. The top of the pipe well for a piezometer needs to be fixed and sealed to allow for the extraction and fixing of sensor cables. The top of the pipe well for a submersible water level gauge also generally requires the installation of fixed pipe fittings to allow for the extraction and fixing of sensor leads.

[0003] When burying fixed pipes above the drilled hole, concrete or cement mortar must be poured into the gap between the drilled hole and the pipe. To do this, the bottom of the gap must be filled and sealed to prevent leakage of the concrete or cement mortar. In current construction methods, the filling material for the bottom of the gap is mostly plastic, asphalt sheets, or foam, which are flexible materials. This construction method has many problems:

[0004] 1. The sealing performance of the filling material is poor, and concrete or cement mortar often leaks out and falls into the drilled hole.

[0005] 2. During the filling process, the lower part of these bottom flexible materials is exposed, making it difficult to judge whether the filling has reached the bottom area. Filling too deep or too much will cause the filling material to fall off and fall into the lower drilled holes, affecting the grouting quality; filling too shallowly will shorten the concrete pouring section and the pipe fittings cannot be reliably fixed.

[0006] 3. The bottom filling material is difficult to remove after concrete pouring, creating quality and safety risks during the subsequent grouting process. This problem can occur to some extent when submersible pumps, piezometers, and immersion water level gauges are buried at the top of a pipe well. Summary of the Invention

[0007] To address existing issues such as concrete leakage, difficulty in placing sealing materials at the bottom of gaps, and easy detachment of sealing materials, the present invention provides a pre-buried pipe fitting structure for a drilled hole or manhole with a leak-proof band. A support plate and leak-proof band are positioned beneath the pipe fitting. The leak-proof band is expanded by filling it with grout or other fluid, compressing the pipe fitting against the borehole wall, preventing leakage during subsequent concrete pouring and improving the concrete filling rate and density. After pouring, the leak-proof band remains at the bottom of the gap as part of the embedded pipe fitting, preventing it from falling off.

[0008] The technical solution adopted by the present invention to solve its technical problem is:

[0009] A pre-buried pipe fitting structure for a borehole or pipe well with a leak-proof belt, comprising a pre-buried pipe fitting, a support plate, a leak-proof belt, an inlet pipe, an exhaust pipe, an inlet valve, and an exhaust valve; the pre-buried pipe fitting is the main body of the pre-buried pipe fitting structure; the support plate is arranged at the bottom of the pre-buried pipe fitting and is fixedly connected to the pre-buried pipe fitting; the leak-proof belt is an elastic air bag, which is arranged on the support plate and sleeved on the pre-buried pipe fitting; the support plate prevents the leak-proof belt from falling off; the inlet pipe and the exhaust pipe are both connected to the leak-proof belt, and the leak-proof belt will expand when filled with fluid such as cement mortar, The gap between the embedded pipe fittings and the borehole or pipe well is sealed; the lower end of the inlet pipe is connected to the leak-proof belt, and the upper end of the inlet pipe extends to the outside of the borehole or pipe well and is connected to the fluid pressurizing device; the inlet pipe is provided with the inlet valve, and the inlet valve is used for filling control of the leak-proof belt; the lower end of the exhaust pipe is connected to the leak-proof belt, and the upper end of the exhaust pipe extends to the outside of the borehole or pipe well and is connected to the atmosphere, and the exhaust pipe is provided with the exhaust valve; the exhaust valve is opened during the filling process of the leak-proof belt to discharge the air in the leak-proof belt, and when the leak-proof belt is full, the exhaust valve is closed.

[0010] Furthermore, a guide plate is provided above the leak-proof belt and is fixedly connected to the embedded pipe. The guide plates are evenly distributed on the periphery of the embedded pipe to limit the expansion of the leak-proof belt in a specific area, while also having a certain supporting and protective effect.

[0011] Furthermore, the support bar is fixed to the upper part of the embedded pipe to support the embedded pipe before pouring concrete to prevent it from tilting.

[0012] Furthermore, when the length of the inlet pipe is insufficient, it is lengthened by a pipe joint; when the length of the drainage pipe is insufficient, it is lengthened by a pipe joint.

[0013] Furthermore, the fluid pressurizing device is a mud pump or a water pump.

[0014] Furthermore, the support plate is an annular plate, or a sheet plate evenly distributed around the bottom of the embedded pipe.

[0015] Furthermore, there are more than two inlet pipes and two exhaust pipes.

[0016] Furthermore, the support plate and the guide plate are combined together, and the cross section thereof is a semicircular ring.

[0017] The beneficial effects of the present invention are:

[0018] The embedded pipe fittings of the present invention are provided with leak-proof belts, and the leak-proof belts can be filled with cement slurry or the like using an external mud pump or other fluid pressurizing equipment to cause the leak-proof belts to expand, thereby blocking the gap between the embedded pipe fittings and the borehole, preventing leakage from the bottom during subsequent concrete pouring, and avoiding the problem of easy falling when using a bottom filling material. The filling rate and density of the concrete filling can be improved, so that the upper part of the borehole can be reliably sealed, effectively ensuring the quality of the borehole grouting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the initial state structure of Example 1 of the present invention;

[0020] Figure 2 for Figure 1 AA cross-sectional view;

[0021] Figure 3 for Figure 1 BB cross-sectional view;

[0022] Figure 4 This is a schematic diagram of the structure of the present invention in a charging state;

[0023] Figure 5 This is a schematic diagram of the structure of the present invention in the final buried state;

[0024] Figure 6 This is a cross-sectional view of the bottom structure of Example 2 of the present invention;

[0025] Figure 7 This is a schematic diagram of the initial state structure of Example 3 of the present invention.

[0026] In the figure, 1. embedded pipe fittings, 2. support plate, 3. leak-proof belt, 4. guide plate, 5. inlet pipe, 6. exhaust pipe, 7. pipe joint, 8. inlet valve, 9. mud pump, 10. exhaust valve, 11. support bar. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Example 1

[0029] like Figures 1 to 5As shown, the present invention provides a pre-buried pipe structure for a borehole or pipe well with a leak-proof belt, comprising a pre-buried pipe 1, a support plate 2, a leak-proof belt 3, a guide plate 4, an inlet pipe 5, an exhaust pipe 6, a pipe joint 7, an inlet valve 8, an exhaust valve 10, a support bar 11, etc. The pre-buried pipe 1 is the buried main body; the support plate 2 is an annular plate, disposed at the bottom of the pre-buried pipe 1 and fixedly connected to the pre-buried pipe 1; the leak-proof belt 3 is a circular hollow bag, disposed on the support plate 2 and sleeved on the pre-buried pipe 1, the inlet pipe 5 and the exhaust pipe 6 are connected to the leak-proof belt 3; the lower end of the inlet pipe 5 is connected to the leak-proof belt 3; the upper end of the inlet pipe 5 extends to the outside of the borehole or pipe well, is extended by a pipe joint 7, and is connected to a mud pump 9; an inlet valve 8 is provided on the inlet pipe 5; The inlet valve 8 is used to control the flow of the leak-proof band 3. The lower end of the exhaust pipe 6 is connected to the leak-proof band 3, and the upper end extends to the outside of the borehole or pipe well. It is extended by connecting the pipe joint 7. The exhaust pipe 6 is provided with an exhaust valve 10. The guide plate 4 is arranged above the leak-proof band 3 and fixedly connected to the embedded pipe 1. It is evenly distributed around the periphery of the embedded pipe 1, limiting the expansion of the leak-proof band 3 within a specific area and also providing a certain degree of support and protection. The inlet valve 8 and the exhaust valve 10 can be conventional stop valves. The pipe joint 7 can be a quick connector. The support bar 11 has a certain degree of flexibility and is fixed around the upper and middle parts of the embedded pipe 1 to support the embedded pipe 1 before pouring and prevent tilting.

[0030] In the initial state, the mud pump 9, the inlet valve 8, the pipe joint 7, the inlet pipe 5, the leak-proof belt 3, the exhaust pipe 6, and the exhaust valve 10 form a passage; the inlet valve 8 and the exhaust valve 10 are in the open state.

[0031] In the charging state, open the mud pump 9, fill the leak-proof belt 3 with cement slurry or other fluid through the inlet valve 8 and the inlet pipe 5, and at the same time discharge the air in the leak-proof belt 3 through the exhaust pipe 6 and the exhaust valve 10; when all the cement slurry is discharged from the outlet of the exhaust valve 10, close the exhaust valve 10 and keep the mud pump 9 running; when the leak-proof belt 3 expands to a reasonable state and completely blocks the lower gap between the embedded pipe 1 and the borehole or pipe well, close the inlet valve 8 and the mud pump 9.

[0032] When the filling state is complete, the mud pump 9 is removed and the pipe pre-embedding can begin. Concrete is poured between the pre-embedded pipe 1 and the drilled hole and vibrated with a vibrator. After the concrete solidifies, the cement slurry in the leak-proof band 3 has also solidified. The above-ground parts of the inlet pipe 5 and the exhaust pipe 6 can be cut off, and the leak-proof band 3 remains in the cast body, reaching the final embedding state.

[0033] Example 2

[0034] like Figure 1 、 Figure 2 、 Figure 6As shown, unlike Example 1, the support plate 2 of this embodiment is discontinuous and is a sheet-like plate evenly distributed around the bottom of the embedded pipe 1, which can also effectively support the leak-proof band 3. The leak-proof band 3 must have at least one inlet pipe 5 and one exhaust pipe 6. If the diameter of the drill hole or pipe well is greater than 1.5m, multiple inlet pipes 5 and exhaust pipes 6 can also be used simultaneously.

[0035] Example 3

[0036] like Figure 2 、 Figure 7 As shown, the difference from Example 1 and Example 2 is that the support plate 2 and the guide plate 4 of this embodiment are combined together, and the cross section is made into a semicircular ring to protect and support the leak-proof belt 3.

[0037] The above embodiments are used in conjunction with the accompanying drawings to describe the present invention, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the scope of protection of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A pre-buried pipe structure for a borehole or pipe well with a leak-proof belt, characterized in that: It includes pre-buried pipe fittings, support plates, leak-proof belts, inlet pipes, exhaust pipes, inlet valves and exhaust valves; the pre-buried pipe fittings are the main body of the pre-buried pipe fitting structure; the support plates are arranged at the bottom of the pre-buried pipe fittings and are fixedly connected to the pre-buried pipe fittings; the leak-proof belts are elastic air bags, which are arranged on the support plates and sleeved on the pre-buried pipe fittings; the inlet pipes and exhaust pipes are both connected to the leak-proof belts, which expand and enlarge when filled with cement mortar fluid, thereby sealing the gap between the pre-buried pipe fittings and the borehole or pipe well; the lower end of the inlet pipe is connected to the leak-proof belt, and the upper end of the inlet pipe extends to the outside of the borehole or pipe well and is connected to the fluid pressurizing device; the upper end of the inlet pipe The inlet valve is provided; the lower end of the exhaust pipe is communicated with the leak-proof belt, the upper end of the exhaust pipe extends to the outside of the borehole or pipe well, and is communicated with the atmosphere, and the exhaust valve is provided on the exhaust pipe; the exhaust valve opens during the filling process of the leak-proof belt to discharge the air in the leak-proof belt, and when the leak-proof belt is full, the exhaust valve closes; a guide plate is provided above the leak-proof belt, and the guide plate is fixedly connected to the embedded pipe fitting and is evenly distributed on the outer periphery of the embedded pipe fitting; a support bar is fixed to the upper part of the embedded pipe fitting; the support plate is an annular plate, or a sheet plate evenly distributed around the bottom of the embedded pipe fitting; the guide plate is combined with the support plate, and its cross-section is a semicircular ring.

2. The pre-buried pipe structure for a borehole or pipe well with a leak-proof belt according to claim 1, characterized in that: When the inlet pipe is not long enough, it is extended by a pipe joint; when the exhaust pipe is not long enough, it is extended by a pipe joint.

3. The pre-buried pipe structure for a borehole or pipe well with a leak-proof belt according to claim 1, characterized in that: The fluid pressurizing device is a mud pump or a water pump.

4. The pre-buried pipe structure for a borehole or pipe well with a leak-proof band according to claim 1, characterized in that: There are more than two inlet pipes and two exhaust pipes.

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