Independent vacuum type pneumatic dewatering system

Abstract

The utility model particularly relates to an independent vacuum type pneumatic dewatering system which comprises a tube well, the tube well is located in a foundation pit, a sealing mechanism is arranged at the upper end of the tube well, an air inlet pipe, a drainage pipe, a vacuumizing pipe and a water vapor displacer are arranged in the tube well, the air inlet pipe, the drainage pipe and the vacuumizing pipe penetrate through the sealing mechanism, and the water vapor displacer is located at the bottom of the tube well. The gas inlet pipe and the drainage pipe are connected with the water-gas displacer, the gas inlet pipe supplies gas to the water-gas displacer, the drainage pipe discharges water discharged by the water-gas displacer out of the tube well, and the vacuumizing pipe is located on the upper portion of the tube well and pumps out gas in the tube well; according to the device, permeation of water in soil at the bottom of a foundation pit can be accelerated in a vacuumizing mode, the water is rapidly pumped away through the water-gas displacer, the upper end of the tube well can be rapidly sealed through the detachable sealing mechanism, a large amount of external gas is prevented from entering the tube well through the upper end of the tube well, and the sealing effect is good. And the vacuumizing effect is influenced.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction equipment, and particularly relates to an independent vacuum pneumatic dewatering system. Background Art

[0002] With the in-depth development of urban development, the excavation depth of foundation pits has gradually deepened and the area of foundation pits has gradually expanded. As a prerequisite for ensuring the smooth excavation of foundation pits, the dewatering of foundation pits has received more and more attention.

[0003] Weakly permeable soil layers such as silt and clay silt are widely present in soft soil areas such as the Yangtze River Delta, the Pearl River Delta and coastal areas. The above soil layers often have the characteristics of high water content and poor permeability, high sensitivity and high compressibility. For deep foundation pit dewatering, conventional gravity pipe well dewatering technology cannot achieve effective dewatering effect. The above soft soil areas will subsequently promote the use of conventional submersible pump + vacuum technology, but because the water gushing out of the pipe well in the weakly permeable soil layer is small and the submersible pump has poor stability, it has been gradually eliminated.

[0004] In recent years, jet vacuum pumps have been widely used in soft soil areas (such as the Yangtze River Delta region) for vacuum dewatering mode that both pumps water and extracts air, which has slightly improved the drainage effect. However, under normal circumstances, when there is no water flowing through the jet vacuum pump pipe well, the vacuum degree will drop sharply. The operation and maintenance of the vacuum pipe well is difficult, and the vacuum degree cannot be effectively guaranteed, resulting in the inability to effectively guarantee the drainage effect.

[0005] In order to solve the above problems, the present application provides an independent vacuum pneumatic dewatering system that uses pneumatic dewatering in combination with a large amount of practical experience in dewatering, and loads vacuum into the pipe well to adapt to the effective dewatering in weakly permeable soil layers. Utility Model Content

[0006] The utility model aims to solve the problems existing in the existing production equipment technology and provides an independent vacuum pneumatic precipitation system.

[0007] The purpose of the utility model is achieved as follows: an independent vacuum pneumatic dewatering system includes a pipe well, which is located in a foundation pit. A sealing mechanism is provided at the upper end of the pipe well. An air intake pipe, a drainage pipe, a vacuum pipe, and a water vapor displacer are provided in the pipe well. The air intake pipe, the drainage pipe, and the vacuum pipe pass through the sealing mechanism. The water vapor displacer is located at the bottom of the pipe well. The air intake pipe and the drainage pipe are connected to the water vapor displacer. The air intake pipe supplies air to the water vapor displacer. The drainage pipe discharges the water discharged from the water vapor displacer out of the pipe well. The vacuum pipe is located at the upper part of the pipe well and the vacuum pipe extracts the gas in the pipe well.

[0008] Furthermore, the upper end of the air inlet pipe is connected to a control box, the front end of the control box is connected to an air storage tank, and the front end of the air storage tank is connected to an air supply mechanism.

[0009] Furthermore, the upper end of the vacuum tube is connected to a vacuum mechanism.

[0010] Furthermore, the sealing mechanism is sealed to the pipe well, and the air inlet pipe, drain pipe, vacuum pipe and the sealing mechanism are sealed to each other.

[0011] Furthermore, the sealing mechanism includes a sealing cover, which is detachably located at the upper end of the pipe well, and the air inlet pipe, the drain pipe, and the vacuum pipe pass through the sealing cover.

[0012] Furthermore, an operation hole is provided in the middle of the sealing cover, a placement groove is provided at the upper end of the operation hole, a sealing plug is provided in the placement groove and can move up and down, and the bottom of the sealing plug seals the operation hole, the air intake pipe, the drain pipe, and the vacuum pipe pass through the sealing plug, and a sealing structure is formed between the air intake pipe, the drain pipe, the vacuum pipe and the sealing plug.

[0013] Furthermore, the sealing plug includes a plug body 1, on which a plug body 2 is detachably provided, a guide groove is provided on the front side of the plug body 1, and the plug body 2 is located in the guide groove. Three semicircular through holes are respectively provided at the middle connection between the plug body 1 and the plug body 2, and three circular holes are formed between the plug body 1 and the plug body 2 through the semicircular through holes, and the air intake pipe, the drainage pipe, and the vacuum pipe pass through the circular holes.

[0014] Furthermore, grooves are provided on the left and right sides of the plug body.

[0015] There are two operating modes for the water-gas displacer and the vacuum tube: 1. The water-gas displacer and the vacuum tube operate independently: a water-gas displacer that does not discharge gas is selected (this is existing technology, no technical details are given, just select a water-gas displacer of appropriate specifications). During operation, the gas in the water-gas displacer is not discharged into the pipe well; so that the vacuum tube only needs to pump the gas in the pipe well to achieve the vacuum effect; 2. The water-gas displacer and the vacuum tube operate non-independently: the gas in the water-gas displacer is discharged or discharged in small quantities (this is existing technology, no technical details are given, just select a water-gas displacer of appropriate specifications). During operation, after the gas in the water-gas displacer enters the pipe well, it is not only extracted from the pipe well through the vacuum tube, but also the gas discharged from the water-gas displacer is extracted from the pipe well in real time.

[0016] When the utility model is used, the pipe well is placed in the foundation pit, and the side wall of the pipe well fits with the soil in the foundation pit to prevent gas from entering the bottom of the pipe well through the outer wall of the pipe well (this can be achieved by compacting the soil), and the upper end of the pipe well is sealed by a sealing mechanism to prevent a large amount of external gas from entering the pipe well through the upper end of the pipe well during vacuuming and affecting the vacuuming effect (the vacuuming in the pipe well is usually performed to reach 6565kPa or above), and the gas in the pipe well is extracted by the vacuum mechanism, thereby realizing that the water near the bottom of the foundation pit near the bottom of the pipe well is extracted to the bottom of the pipe well through the negative pressure vacuum of the pipe well, and a water-gas displacer is placed at the bottom of the pipe well, that is, below the water surface; the water is then extracted through the water-gas displacer, and the rapid extraction of water contained in the soil at the bottom of the foundation pit is improved by vacuuming the pipe well; compared with the traditional method of water naturally infiltrating into the pipe well and then vacuuming, this technical solution has faster precipitation efficiency.

[0017] Gas is supplied to the gas tank through the gas supply mechanism, the gas tank supplies gas to the air inlet pipe through the control box, the control box controls the air supply to the water-gas displacer through the air inlet pipe, the air inlet pipe supplies gas to the water-gas displacer, and the water-gas displacer discharges the water in the pipe well through the drain pipe.

[0018] Secure the sealing cap to the upper end of the manhole, insert the water-gas displacer through the operating hole in the middle of the sealing cap, and simultaneously insert the vacuum tube, air intake pipe, and drain pipe through the operating hole. Then, place plug body 1 in the placement groove, and each of the vacuum tube, air intake pipe, and drain pipe is placed in the semicircular through-hole on plug body 1. Finally, place plug body 2 in the insertion groove on plug body 1. At this point, plug bodies 1 and 2 fit together, and the vacuum tube, air intake pipe, and drain pipe are located within three circular holes formed between plug bodies 1 and 2 through the semicircular through-hole. The outer surface of plug bodies 1 and 2 is made of rubber, which has a certain degree of elasticity and can achieve a seal between the contact surfaces of the vacuum tube, air intake pipe, and drain pipe. The size of the three circular holes formed between plug bodies 1 and 2 through the semicircular through-hole can be selected to accommodate the cross-sectional dimensions of the vacuum tube, air intake pipe, and drain pipe as needed.

[0019] The utility model can accelerate the penetration of water in the soil at the bottom of the foundation pit by vacuuming, and quickly extract the water through the water-gas displacer, and is provided with a detachable sealing mechanism to quickly seal the upper end of the pipe well, thereby preventing a large amount of external gas from entering the pipe well through the upper end of the pipe well and affecting the vacuuming effect; at the same time, the vacuuming pipe, the air inlet pipe, and the drain pipe can quickly pass through the sealing mechanism and achieve a sealing effect between each other and the sealing mechanism, thereby preventing a large amount of external gas from entering the pipe well through the connection between the vacuuming pipe, the air inlet pipe, the drain pipe and the sealing mechanism and affecting the vacuuming effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an axonometric drawing of the utility model.

[0021] Figure 2 It is a cross-sectional view of the pipe well of the utility model.

[0022] Figure 3 It is a schematic diagram of the local structure of the utility model.

[0023] Figure 4 It is a schematic diagram of the sealing mechanism structure of the utility model.

[0024] Reference numerals for parts list

[0025] 1. Air supply mechanism, 2. Air storage tank, 3. Control box, 4. Air inlet pipe, 5. Drain pipe, 6. Vacuum mechanism, 7. Pipe well, 8. Water-gas displacer, 9. Vacuum pipe, 10. Sealing cover, 11. Plug body 1, 12. Plug body 2. DETAILED DESCRIPTION

[0026] Example 1, as Figure 1-4 As shown, an independent vacuum pneumatic dewatering system includes a pipe well 7, which is located in a foundation pit. A sealing mechanism is provided at the upper end of the pipe well 7. An air inlet pipe 4, a drainage pipe 5, a vacuum pipe 9, and a water vapor displacer 8 are provided in the pipe well 7. The air inlet pipe 4, the drainage pipe 5, and the vacuum pipe 9 pass through the sealing mechanism. The water vapor displacer is located at the bottom of the pipe well 7. The air inlet pipe 4 and the drainage pipe 5 are connected to the water vapor displacer 8. The air inlet pipe 4 supplies air to the water vapor displacer 8. The drainage pipe 5 discharges the water discharged from the water vapor displacer 8 out of the pipe well 7. The vacuum pipe 9 is located at the upper part of the pipe well 7. The vacuum pipe 9 extracts the gas in the pipe well 7, thereby realizing vacuum penetration of the water contained in the soil near the bottom of the pipe well 7 to the bottom of the pipe well 7.

[0027] The upper end of the air inlet pipe 4 is connected to a control box 3, the front end of which is connected to an air tank 2, and the front end of the air tank 2 is connected to an air supply mechanism 1. The upper end of the vacuum tube 9 is connected to a vacuum mechanism 6. The control box 3, air tank 2, air supply mechanism 1, vacuum mechanism 6, and water-gas displacer 8 are not prior art, and a detailed description is omitted. The functions described in this application can be achieved using these devices.

[0028] The sealing mechanism is sealed to the pipe well 7 , and the sealing mechanism includes a sealing cover 10 . The sealing cover 10 is detachably located at the upper end of the pipe well 7 , and the air inlet pipe 4 , the drain pipe 5 , and the vacuum pipe 9 pass through the sealing cover 10 .

[0029] An operating hole is provided in the middle of the sealing cover 10, and a placement slot is provided at the upper end of the operating hole. A sealing plug is provided in the placement slot and can be moved up and down. The bottom of the sealing plug seals the operating hole. The air intake pipe 4, the drain pipe 5, and the vacuum pipe 9 pass through the sealing plug, and a sealing structure is formed between the air intake pipe 4, the drain pipe 5, the vacuum pipe 9, and the sealing plug. The sealing plug includes a plug body 11, and a detachable plug body 2 12 is provided on the plug body 11. A guide slot is provided on the front side of the plug body 11, and the plug body 2 12 is located in the guide slot. Three semicircular through holes are provided at the middle connection between the plug body 11 and the plug body 2 12. Three circular holes are formed between the plug body 11 and the plug body 2 12 through the semicircular through holes. The air intake pipe 4, the drain pipe 5, and the vacuum pipe 9 pass through the circular holes. Grooves are provided on the left and right sides of the plug body 11 to facilitate the removal of the plug body 11 from the placement slot.

[0030] When the present invention is used, the pipe well 7 is placed in the foundation pit, and the side walls of the pipe well 7 fit together with the soil in the foundation pit. The upper end of the pipe well 7 is sealed by a sealing mechanism to prevent a large amount of external gas from entering the pipe well 7 through the upper end of the pipe well 7 during vacuuming and affecting the vacuuming effect. The gas in the pipe well 7 is extracted by the vacuum mechanism 6, and then the water near the bottom of the foundation pit near the bottom of the pipe well 7 is extracted to the bottom of the pipe well 7 through the negative pressure vacuum of the pipe well 7, and the water-gas displacer 8 is placed at the bottom of the pipe well 7, that is, below the water surface; the water is then extracted by the water-gas displacer 8, and the rapid extraction of water in the soil at the bottom of the foundation pit is improved by vacuuming the pipe well 7; compared with the traditional method of water naturally infiltrating into the pipe well 7 and then vacuuming, this technical solution has faster precipitation efficiency.

[0031] Gas is supplied to the gas storage tank 2 through the gas supply mechanism 1, and the gas storage tank 2 supplies gas to the air intake pipe 4 through the control box 3. The control box 3 controls the air supply to the water-gas displacer 8 through the air intake pipe 4, and the air intake pipe 4 supplies gas to the water-gas displacer 8. The water-gas displacer 8 discharges the water in the pipe well 7 through the drain pipe 5.

[0032] Secure the sealing cap 10 to the upper end of the manhole 7, insert the water-gas displacer 8 through the operating hole in the center of the sealing cap 10, and simultaneously insert the vacuum tube 9, air intake pipe 4, and drain pipe 5 through the operating hole. Then, place the first plug 11 in the placement groove, and place the vacuum tube 9, air intake pipe 4, and drain pipe 5 in the semicircular through-holes of the first plug. Finally, place the second plug 12 in the insertion groove of the first plug. At this point, the first plug 11 and the second plug fit together, and the vacuum tube 9, air intake pipe 4, and drain pipe 5 are located in the three circular holes formed between the first plug 11 and the second plug 12 through the semicircular through-holes. The outer surface of the first plug 11 and the second plug 12 is made of rubber, which has a certain degree of elasticity, thus achieving a seal between the contact surfaces of the vacuum tube 9, air intake pipe 4, and drain pipe 5. The size of the three circular holes formed between the first plug 11 and the second plug 12 can be selected as needed to accommodate the cross-sectional dimensions of the vacuum tube 9, air intake pipe 4, and drain pipe 5.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An independent vacuum pneumatic dewatering system, comprising a pipe well located in a foundation pit, characterized in that: A sealing mechanism is provided at the upper end of the pipe well, and an air intake pipe, a drainage pipe, a vacuum pipe, and a water vapor displacer are provided in the pipe well. The air intake pipe, the drainage pipe, and the vacuum pipe pass through the sealing mechanism. The water vapor displacer is located at the bottom of the pipe well, and the air intake pipe and the drainage pipe are connected to the water vapor displacer. The air intake pipe supplies air to the water vapor displacer, and the drainage pipe discharges the water discharged from the water vapor displacer into the pipe well. The vacuum pipe is located at the upper part of the pipe well, and the vacuum pipe extracts the gas in the pipe well.

2. The independent vacuum pneumatic precipitation system according to claim 1, characterized in that: The upper end of the air inlet pipe is connected to a control box, the front end of the control box is connected to an air storage tank, and the front end of the air storage tank is connected to an air supply mechanism.

3. The independent vacuum pneumatic precipitation system according to claim 1, characterized in that: The upper end of the vacuum tube is connected with a vacuum mechanism.

4. The independent vacuum pneumatic precipitation system according to claim 1, characterized in that: The sealing mechanism is in sealed connection with the pipe well.

5. The independent vacuum pneumatic precipitation system according to claim 1, characterized in that: The air inlet pipe, the drain pipe, the vacuum pipe and the sealing mechanism are sealed.

6. An independent vacuum pneumatic precipitation system according to claim 1 or 5, characterized in that: The sealing mechanism comprises a sealing cover which is detachably located at the upper end of the pipe well, and an air inlet pipe, a drain pipe and a vacuum pumping pipe pass through the sealing cover.

7. The independent vacuum pneumatic precipitation system according to claim 6, characterized in that: An operation hole is provided in the middle of the sealing cover, a placement groove is provided at the upper end of the operation hole, a sealing plug is provided in the placement groove and can move up and down, and the bottom of the sealing plug seals the operation hole, the air intake pipe, the drain pipe, and the vacuum pipe pass through the sealing plug, and a sealing structure is formed between the air intake pipe, the drain pipe, the vacuum pipe and the sealing plug.

8. The independent vacuum pneumatic precipitation system according to claim 7, characterized in that: The sealing plug includes a plug body 1, on which a plug body 2 is detachably provided. A through-groove is provided on the front side of the plug body 1, and the plug body 2 is located in the through-groove. Three semicircular through holes are respectively provided at the middle connection between the plug body 1 and the plug body 2. Three circular holes are formed between the plug body 1 and the plug body 2 through the semicircular through holes, and the air intake pipe, the drainage pipe, and the vacuum pipe pass through the circular holes.

9. The independent vacuum pneumatic precipitation system according to claim 8, characterized in that: The plug body is provided with grooves on the left and right sides.

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