Muddy silty layer vacuum dewatering equipment and process

Abstract

The present application relates to well point drainage technical field, particularly to a kind of silt silty sand layer vacuum dewatering equipment and process.A kind of silt silty sand layer vacuum dewatering equipment, including well pipe, first pipe, second pipe, energy storage component, impact component and trigger component;Well pipe lower end is equipped with filter section and is inserted into well point, and one end of first pipe and second pipe is respectively communicated with the upper end of well pipe, first pipe is equipped with first piston, and second pipe is equipped with second piston, and the end of first pipe and second pipe away from well pipe is communicated, and the diameter of first pipe is less than the diameter of second pipe;Energy storage component provides energy for the reset of first piston when filter section is blocked;Trigger component limits the position of second piston when first piston resets.The position of first piston and second piston is adjusted by the change of pressure in well pipe, so that the pressure in well pipe is increased when first piston resets, so that the water in well pipe is discharged from filter section, and the cleaning of filter section is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of well point dewatering, and in particular to a vacuum dewatering device and process for silt silty sand layer. BACKGROUND

[0002] In the field of building construction, especially in the engineering involving silt silty sand layer geology, vacuum dewatering is a key link to ensure construction safety and efficiency. By using vacuum dewatering equipment to extract groundwater, the groundwater level can be effectively lowered, the physical and mechanical properties of the foundation soil can be improved, and the risks such as piping and quicksand during foundation pit excavation can be avoided, thereby creating a stable environment for subsequent construction. Therefore, the stable operation of the vacuum dewatering equipment directly affects the construction progress and quality of the building project.

[0003] However, when using the traditional vacuum dewatering equipment to pump water in the silt silty sand layer, the technical problem of filter screen blockage is generally encountered. Since the geological layer contains a large amount of silt and fine sand, during the pumping process, the silt will flow through the sand layer with the water flow, gradually adhere to and block the filter screen outside the filter pipe section. After the filter screen is blocked, the water flow channel is blocked, and the vacuum dewatering equipment cannot normally extract groundwater, resulting in a sharp decline in the dewatering effect, and even forcing the construction to be suspended, which seriously affects the project progress.

[0004] To solve this problem, the existing technology usually uses manual backwashing to handle it: the well pipe and the main pipe need to be disassembled and separated, and then high-pressure water is manually introduced into the well pipe to impact the filter screen to remove the blocked silt. However, the process of disassembling and reassembling the well pipe and the main pipe is complicated, consumes a lot of manpower and time, and further prolongs the construction downtime period. Moreover, it is difficult to accurately control the flushing force and range of the high-pressure water by manual control, which may result in incomplete removal of the blockage due to insufficient flushing, or damage to the filter screen structure due to excessive flushing, thereby shortening the service life of the equipment. SUMMARY

[0005] Therefore, it is necessary to provide a vacuum dewatering device and process for silt silty sand layer to solve the problem of complex filter screen cleaning process in the existing vacuum dewatering equipment.

[0006] The above-mentioned purpose is achieved by the following technical solutions:

[0007] The application discloses a vacuum dewatering equipment for silt powder layer, which is used for pumping water in a well point into a water storage pool and comprises a pipeline mechanism and a vacuum mechanism. The pipeline mechanism comprises a well pipe, a first pipe, a second pipe, a sleeve pipe, an energy storage assembly, an impact assembly and a trigger assembly. The lower end of the well pipe is provided with a water filtering section and extends into the well point, and the upper end of the well pipe is provided with a water outlet. The upper ends of the first pipe and the second pipe are communicated with the upper end of the well pipe. The first pipe is provided with a first piston, and the second pipe is provided with a second piston. The ends, away from the well pipe, of the first pipe and the second pipe are communicated through a communicating pipe and are filled with water. The communicating pipe can be communicated with the water storage pool. The diameter of the first pipe is smaller than that of the second pipe. When the water filtering section is blocked, the second piston slides in the second pipe to move close to the well pipe and drives the first piston to slide in the first pipe to move away from the well pipe. The sleeve pipe is slidably arranged in the well pipe and the first pipe and is slidably connected with the first piston, and is used for blocking the water outlet when the first piston moves away from the well pipe. The energy storage assembly is used for providing a restoring power for the first piston and the second piston. The impact assembly is used for making the communicating pipe communicated with the water storage pool when the sleeve pipe blocks the water outlet. The trigger assembly is used for fixing the positions of the second piston and the sleeve pipe when the water outlet is blocked and canceling the limitation on the positions of the second piston and the sleeve pipe after the first piston is restored. The vacuum mechanism is used for pumping the water in the well pipe from the water outlet into the water storage pool and making the energy storage assembly store energy when the water filtering section is blocked.

[0008] Preferably, the first piston comprises a first pull rod and a first slide column. The first pull rod penetrates through the first pipe and is slidably connected with the first pipe in the axial direction of the first pipe. The first pipe is coaxial with the well pipe. The first slide column is installed at the end of the first pull rod close to the well pipe. The sleeve pipe is sleeved on the first slide column and is slidably connected with the first pipe and the first slide column. The first slide column can abut against the sleeve pipe when the first slide column moves away from the well pipe. The first slide column and the sleeve pipe divide the first pipe into two chambers arranged in the vertical direction and isolated from each other.

[0009] Preferably, the second piston comprises a second pull rod and a second slide column. The second pull rod penetrates through the second pipe and is slidably connected with the second pipe in the axial direction of the second pipe. The second slide column is installed at the end of the second pull rod close to the well pipe and can divide the second pipe into two chambers arranged in the axial direction of the second pipe. One chamber, away from the well pipe, of the two chambers is communicated with one chamber, away from the well pipe, of the first pipe through the communicating pipe between the first pipe and the second pipe.

[0010] Preferably, the energy storage assembly comprises a first spring and a second spring. The first spring is sleeved on the first pull rod and is connected with the first pipe and the first slide column. The second spring is sleeved on the second pull rod and is connected with the second pipe and the second pull rod.

[0011] Preferably, one end of the first pull rod outside the first pipe and one end of the second pull rod outside the second pipe are both provided with a positioning block for limiting the positions of the first slide column and the second slide column respectively.

[0012] Preferably, the impact assembly comprises a sliding sleeve and a third spring, the sliding sleeve is sleeved on the second pull rod and is in sliding connection with the second pull rod, the second pipe is provided with an interface, the communicating pipe is connected with the second pipe through the interface, the sliding sleeve is located in the second pipe and is located on the side of the interface away from the second sliding column, the third spring is sleeved on the second pull rod and is connected with the second sliding column and the sliding sleeve, the second pipe is provided with a blocking ring, the sliding sleeve is located between the second sliding column and the blocking ring, the sliding sleeve can be clamped with the blocking ring and divide the cavity in the second pipe away from the well pipe into two small cavities that can be isolated from each other, the second pipe is provided with a water suction pipe connected with the water storage pool, and the water suction pipe is located on the side of the blocking ring away from the communicating pipe.

[0013] Preferably, the sleeve is provided with a second hole and a third hole, the second hole is located above the third hole, the first sliding column is provided with a stopper on the peripheral surface, the stopper is slidingly arranged in the second hole, and the stopper is in sliding connection with the sleeve and the first pipe, when the first sliding column is located at the initial position, the stopper is located in the first pipe, the trigger assembly comprises a top rod, a spring piece and a fourth spring, the top rod is slidingly arranged on the second sliding column in the axial direction of the second pipe, the spring piece is obliquely arranged on the peripheral surface of the top rod, the spring piece gradually approaches the second pull rod from the side close to the top rod to the side away from the top rod, the top rod is slidingly arranged in the third hole and clamped by the spring piece and the sleeve when the water outlet is blocked, the second pipe is located between the first pipe and the well pipe, and the first sliding column can abut against the spring piece when the first sliding column is reset, and the fourth spring is sleeved on the top rod and connected with the top rod and the second sliding column.

[0014] Preferably, the upper end of the well pipe is provided with an expansion pipe, the first pipe and the second pipe are connected with the expansion pipe and are in communication with the well pipe through the expansion pipe, and the cross-sectional dimension of the expansion pipe is greater than the cross-sectional dimension of the first pipe and the second pipe.

[0015] Preferably, the vacuum mechanism comprises a vacuum pump and a main pipe, the vacuum pump is connected with the main pipe, and the pipeline mechanism is provided with a plurality of pipeline mechanisms, and the well pipe in each pipeline mechanism is in communication with the main pipe through the water outlet thereon.

[0016] The application also provides a vacuum dewatering process for a silt and silty sand layer, which utilizes the vacuum dewatering equipment for a silt and silty sand layer.

[0017] S1, digging a well point and digging a water storage pool near the well point.

[0018] S2, placing the end of the well pipe provided with a water filtering section into the well point, and filling water in the part where the first pipe and the second pipe are in communication.

[0019] S3, installing a vacuum mechanism, and the vacuum mechanism draws water in the well pipe through negative pressure.

[0020] S4. If the filter section is blocked, the vacuum mechanism continues to extract water from the well pipe, causing the pressure inside the well pipe to continue to decrease. The second piston is attracted to the well pipe by the suction of the vacuum mechanism and moves the first piston away from the well pipe through the water inside the connecting pipe, and the energy storage component stores energy.

[0021] S5, the sleeve blocks the outlet, triggering the component to restrict the sleeve position.

[0022] S6, the impact component starts to connect the connecting pipe to the water storage tank, and the energy storage component releases energy.

[0023] S7, the first piston resets, the pressure inside the well pipe increases, and the water inside the well pipe is discharged from the filter section to backflush the filter section.

[0024] S8, the first piston reset causes the second piston to reset under the action of the energy storage component through the trigger component, and the sleeve resets.

[0025] The beneficial effects of this invention are as follows: When the filter section is blocked, the vacuum mechanism generates negative pressure inside the well pipe. Through the cooperation of the first and second pipes, the negative pressure causes the second piston to approach the well pipe and pull the first piston away from the well pipe. A triggering component, along with the cooperation of the first and second pistons, ensures that when the vacuum mechanism stops pumping into the well pipe, the first piston moves in the opposite direction under the negative pressure inside the well pipe, causing the negative pressure to disappear. An energy storage component causes the first piston to fully reset and increases the pressure inside the well pipe, causing water to be discharged from the filter section and backflushing it. Simultaneously, the energy storage component resets the second piston, and the casing can also reset under its own weight, enabling repeated cleaning of the filter section, improving automation, and reducing manual labor intensity. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a vacuum dewatering device for silty sand layers provided in an embodiment of the present invention;

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 This is a schematic diagram of the pipeline structure of a vacuum dewatering device for silty sand layers provided in an embodiment of the present invention;

[0029] Figure 4 Right view of the pipeline structure of a vacuum dewatering device for silty sand layers provided in an embodiment of the present invention;

[0030] Figure 5 for Figure 4 Sectional view along the BB direction;

[0031] Figure 6 for Figure 5An enlarged view at middle C;

[0032] Figure 7 A filter section blockage state diagram of a vacuum dewatering equipment for a silt silty layer provided by the embodiment of the present application;

[0033] Figure 8 A filter section blockage state diagram of a vacuum dewatering equipment for a silt silty layer provided by the embodiment of the present application; Figure 7 An enlarged view at middle D;

[0034] Figure 9 A filter section blockage state diagram of a vacuum dewatering equipment for a silt silty layer provided by the embodiment of the present application;

[0035] Figure 10 A filter section blockage state diagram of a vacuum dewatering equipment for a silt silty layer provided by the embodiment of the present application; Figure 9 An enlarged view at middle E.

[0036] Wherein:

[0037] 100, water storage tank; 101, well point; 102, well pipe; 103, first pipe; 104, second pipe; 105, casing pipe; 106, filter section; 107, water outlet; 108, first pull rod; 109, first sliding column; 110, first hole; 111, second pull rod; 112, second sliding column; 113, first spring; 114, second spring; 115, sliding sleeve; 116, third spring; 117, retaining ring; 118, water suction pipe; 119, rubber block; 120, second hole; 121, third hole; 122, stop block; 123, jacking rod; 124, spring piece; 125, fourth spring; 126, sliding groove; 127, through groove; 128, clamping rod; 129, expanded pipe; 130, vacuum pump; 131, main pipe; 133, communication pipe. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0039] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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, and therefore should not be construed as limiting the invention.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] like Figures 1 to 10As shown, the embodiment of the present application provides a vacuum dewatering equipment for silty silt layer, which is used for pumping water in the well point 101 into the water storage pool 100, and comprises a pipeline mechanism and a vacuum mechanism. The pipeline mechanism comprises a well pipe 102, a first pipe 103, a second pipe 104, a sleeve pipe 105, an energy storage assembly, an impact assembly and a trigger assembly. The lower end of the well pipe 102 is provided with a water filtering section 106 and extends into the well point 101, and the upper end of the well pipe 102 is provided with a water outlet 107. One end of the first pipe 103 and the second pipe 104 is communicated with the upper end of the well pipe 102 respectively. The first pipe 103 is provided with a first piston, and the second pipe 104 is provided with a second piston. The ends of the first pipe 103 and the second pipe 104 away from the well pipe 102 are communicated through a communication pipe 133 and filled with water. The communication pipe 133 can be communicated with the water storage pool 100. The diameter of the first pipe 103 is smaller than that of the second pipe 104. When the water filtering section 106 is blocked, the second piston slides in the second pipe 104 to approach the well pipe 102 and drives the first piston to slide in the first pipe 103 away from the well pipe 102. The sleeve pipe 105 is slidably arranged in the well pipe 102 and the first pipe 103 and slidably connected with the first piston, and is used for blocking the water outlet 107 when the first piston is away from the well pipe 102. The energy storage assembly is used for providing a restoring power for the first piston and the second piston. The impact assembly is used for communicating the communication pipe 133 with the water storage pool 100 when the sleeve pipe 105 blocks the water outlet 107. The trigger assembly is used for fixing the positions of the second piston and the sleeve pipe 105 when the water outlet 107 is blocked and canceling the limitation on the positions of the second piston and the sleeve pipe 105 after the first piston is restored. The vacuum mechanism is used for pumping the water in the well pipe 102 from the water outlet 107 into the water storage pool 100 and storing energy for the energy storage assembly when the water filtering section 106 is blocked.

[0042] When the water filtering section 106 is blocked, the vacuum mechanism generates negative pressure in the well pipe 102. Through the cooperation of the first pipe 103 and the second pipe 104, the negative pressure makes the second piston approach the well pipe 102, and the second piston drives the first piston to move away from the well pipe 102 through the communication pipe 133. The trigger assembly is arranged and cooperates with the first piston and the second piston. When the vacuum mechanism no longer pumps the inside of the well pipe 102, the first piston reversely moves in the well pipe 102 under the action of the negative pressure and makes the negative pressure in the well pipe 102 disappear. The energy storage assembly is arranged to make the first piston completely restore and increase the pressure in the well pipe 102, so that the water in the well pipe 102 is discharged from the water filtering section 106 and the water filtering section 106 is back-flushed. At the same time, the energy storage assembly restores the second piston, and the sleeve pipe 105 can also be restored under its own gravity, so that the water filtering section 106 can be repeatedly cleaned, the degree of automation is improved, and the labor intensity is also reduced.

[0043] In the embodiment, the first pipe 103 and the second pipe 104 are closed at the end away from the well pipe 102; the first piston comprises a first pull rod 108 and a first slide column 109, the first pull rod 108 penetrates the first pipe 103 and is in sliding connection with the first pipe 103 in the axial direction of the first pipe 103, and the first pipe 103 is coaxial with the well pipe 102; the first slide column 109 is installed at the end of the first pull rod 108 close to the well pipe 102, the sleeve pipe 105 is sleeved on the first slide column 109 and is in sliding connection with the first pipe 103 and the first slide column 109 respectively; the first slide column 109 can abut against the sleeve pipe 105 when the first slide column 109 is away from the well pipe 102, and the first slide column 109 and the sleeve pipe 105 divide the first pipe 103 into two chambers arranged in the vertical direction and isolated from each other, and the volumes of the two chambers change synchronously and negatively when the first slide column 109 or the sleeve pipe 105 slides in the vertical direction. The first hole 110 is formed in the side surface of the sleeve pipe 105, and the water outlet 107 is in communication with the inside of the well pipe 102 through the first hole 110 when the water filtering section 106 is not blocked, so that the vacuum mechanism can suck the water in the well pipe 102.

[0044] In the embodiment, the axis of the second pipe 104 is perpendicular to the well pipe 102, the second piston comprises a second pull rod 111 and a second slide column 112, the second pull rod 111 penetrates the second pipe 104 and is in sliding connection with the second pipe 104 in the axial direction of the second pipe 104, and the second slide column 112 is installed at the end of the second pull rod 111 close to the well pipe 102 and can divide the second pipe 104 into two chambers arranged in the axial direction of the second pipe 104, wherein one chamber away from the well pipe 102 is in communication with one chamber away from the well pipe 102 in the first pipe 103 through the communication pipe 133 between the first pipe 103 and the second pipe 104, and since the two chambers in communication with the communication pipe 133 are filled with water, when the volume of one chamber increases, the volume of the other chamber will relatively decrease, that is, when the second slide column 112 approaches the well pipe 102, the first slide column 109 will be away from the well pipe 102. The cross-sectional area of the second pipe 104 is larger than that of the first pipe 103, and after the water filtering section 106 is blocked, the second slide column 112 is closer to the well pipe 102 than the first slide column 109, so that the second slide column 112 drives the first slide column 109 to be away from the well pipe 102, and then the energy storage assembly stores energy.

[0045] In the embodiment, the energy storage assembly comprises a first spring 113 and a second spring 114. The first spring 113 is sleeved on the first pull rod 108 and connected with the first pipe 103 and the first slide column 109. The second spring 114 is sleeved on the second pull rod 111 and connected with the second pipe 104 and the second pull rod 111. When the second pull rod 111 is close to the well pipe 102 and the first pull rod 108 is away from the well pipe 102, the first spring 113 and the second spring 114 store energy respectively and provide a restoring force for the first pull rod 108 and the second pull rod 111 after the suction force of the vacuum mechanism disappears.

[0046] In the embodiment, the first pull rod 108 is provided with a positioning block at one end outside the first pipe 103, and the second pull rod 111 is provided with a positioning block at one end outside the second pipe 104, which are respectively used for limiting the positions of the first slide column 109 and the second slide column 112.

[0047] The second spring 114 is arranged outside the second pipe 104. The second spring 114 is connected with the second pull rod 111 through the positioning block on the second pull rod 111. The end of the second spring 114 away from the second pipe 104 abuts against the positioning block on the second pull rod 111, so that the length of the second pipe 104 can be saved. The positioning block on the first pull rod 108 is threadedly connected with the second pull rod 111, so that the position of the second slide column 112 relative to the second pipe 104 can be adjusted.

[0048] In the embodiment, the impact assembly comprises a sliding sleeve 115 and a third spring 116. The sliding sleeve 115 is sleeved on the second pull rod 111 and slidably connected with the second pull rod 111. The second pipe 104 is provided with an interface. A connecting pipe 133 is connected with the second pipe 104 through the interface. The sliding sleeve 115 is located in the second pipe 104 and on the side of the interface away from the second slide column 112. The third spring 116 is sleeved on the second pull rod 111 and connected with the second slide column 112 and the sliding sleeve 115. The second pipe 104 is provided with a blocking ring 117. The sliding sleeve 115 is located between the second slide column 112 and the blocking ring 117. The sliding sleeve 115 can be clamped with the blocking ring 117 and divide the cavity in the second pipe 104 away from the well pipe 102 into two small cavities which can be isolated from each other. The second pipe 104 is provided with a water suction pipe 118 connected with the water storage pool 100. The water suction pipe 118 is located on the side of the blocking ring 117 away from the connecting pipe 133.

[0049] Specifically, the sliding sleeve 115 is provided with a rubber block 119, the rubber block 119 is elastic, and the rubber block 119 is clamped with the stop ring 117 in the axial direction of the second pipe 104. When the water outlet 107 is not blocked, the sliding sleeve 115 is clamped with the stop ring 117, and the communication pipe 133 is not communicated with the water storage pool 100; when the water filtering section 106 is blocked, as the second sliding rod 112 continuously approaches the well pipe 102, the third spring 116 is gradually elongated, the pulling force of the third spring 116 on the sliding sleeve 115 gradually increases, until the water outlet 107 is blocked, the third spring 116 can pull the sliding sleeve 115 to slide to separate the rubber block 119 from the stop ring 117, so that the communication pipe 133 is communicated with the water storage pool 100 through the water suction pipe 118, the first sliding rod 109 is no longer affected by the second sliding rod 112, and then gradually resets under the action of the first spring 113, and the second sliding rod 112 and the sleeve pipe 105 do not change the position under the action of the trigger assembly, so that the water in the well pipe 102 can be discharged from the water filtering section 106.

[0050] Specifically, in order to facilitate installation and subsequent maintenance, the first pipe 103 and the second pipe 104 are designed in a split type.

[0051] In the embodiment, the sleeve pipe 105 is provided with a second hole 120 and a third hole 121, the second hole 120 is located above the third hole 121, the first sliding rod 109 is provided with a stop block 122 on the peripheral surface, the stop block 122 is slidingly arranged in the second hole 120, and the stop block 122 is slidingly connected with the sleeve pipe 105 and the first pipe 103; when the first sliding rod 109 is located at the initial position, the stop block 122 is in the first pipe 103. When the first hole 110 is communicated with the water outlet 107, the second pipe 104 is communicated with the well pipe 102 through the second hole 120; when the water outlet 107 is gradually blocked by the sleeve pipe 105, the sleeve pipe 105 will slide in the first pipe 103, the second hole 120 will also enter the second pipe 104, and the second sliding rod 112 and the stop block 122 can divide the inside of the sleeve pipe 105 into two mutually isolated chambers, so that the communication pipe 133 cannot be communicated with the well pipe 102 through the first pipe 103, and the pressure in the well pipe 102 is ensured during the resetting process of the first sliding rod 109, so that the water in the well pipe 102 can be better discharged from the water filtering section 106.

[0052] The trigger assembly comprises a top rod 123, a spring piece 124 and a fourth spring 125. The top rod 123 is slidingly arranged on the second slide column 112 in the axial direction of the second pipe 104. The spring piece 124 is arranged on the circumferential surface of the top rod 123 in an inclined manner. The spring piece 124 gradually approaches the second pull rod 111 from the side close to the top rod 123 to the side far away from the top rod 123. The top rod 123 is slidingly arranged in the third hole 121 when the water outlet 107 is blocked and is clamped by the spring piece 124 and the sleeve 105. The second pipe 104 is located between the first pipe 103 and the well pipe 102. The first slide column 109 can abut against the spring piece 124 when it is reset. The fourth spring 125 is sleeved on the top rod 123 and connected with the top rod 123 and the second slide column 112.

[0053] Specifically, the end of the second slide column 112 far away from the second pull rod 111 is provided with a sliding groove 126. The sliding groove 126 penetrates through the second slide column 112 and extends into the second pull rod 111. One end of the top rod 123 is slidingly arranged in the sliding groove 126. The circumferential surface of the second pull rod 111 is provided with a through groove 127. The through groove 127 is in communication with the sliding groove 126. One end of the top rod 123 located in the sliding groove 126 is provided with a clamping rod 128. The clamping rod 128 is slidingly arranged in the through groove 127. The clamping rod 128 limits the relative movement of the top rod 123 and the second slide column 112. During the process of blocking the water outlet 107, the top rod 123 will gradually approach the sleeve 105 under the action of the second slide column 112 until it contacts the sleeve 105. At this time, the top rod 123 is in sliding contact with the sleeve 105. The second slide column 112 will compress the fourth spring 125 until the third hole 121 moves to the position of the top rod 123. The top rod 123 will extend into the third hole 121 under the action of the first spring 113. The spring piece 124 will also be in sliding connection with the sleeve 105 and be bent into the inside of the sleeve 105. Under the action of the energy storage assembly and the impact assembly, the first slide column 109 will gradually reset. The spring piece 124 will be clamped with the sleeve 105 to prevent the reset of the second slide column 112, so that the pressure in the well pipe 102 gradually increases. The water in the well pipe 102 can be discharged from the water filtering section 106. Until the first slide column 109 abuts against the spring piece 124, the spring piece 124 is disengaged from the clamping of the sleeve 105, and the second slide column 112 is reset.

[0054] In the embodiment, the upper end of the well pipe 102 is provided with an expansion pipe 129, the first pipe 103 and the second pipe 104 are connected with the expansion pipe 129 and communicate with the well pipe 102 through the expansion pipe 129, and the cross-sectional size of the expansion pipe 129 is larger than the cross-sectional size of the first pipe 103 and the second pipe 104. When the water outlet 107 is blocked, the second slide column 112 is located at the end of the second pipe 104 close to the expansion pipe 129, the fourth spring 125 has been compressed and starts to release energy to push the top rod 123 to slide, the second slide column 112 continues to move close to the expansion pipe 129 under the inertia of itself and the driving of the connecting rod, and then the second slide column 112 is temporarily separated from the second pipe 104, the water in the second pipe 104 flows into the expansion pipe 129, and then the second slide column 112 returns to the first pipe 103 under the reset action of the first slide column 109 and the action of the second spring 114. The second pipe 104 supplements water in the well pipe 102, which can improve the pressure in the well pipe 102 when the first slide column 109 is reset, so that the water in the well pipe 102 can be better cleaned in the water filtering section 106.

[0055] In the embodiment, the vacuum mechanism includes a vacuum pump 130 and a main pipe 131, the vacuum pump 130 and the main pipe 131 are connected, and the pipeline mechanism is provided with a plurality of well pipes 102, each well pipe 102 in the pipeline mechanism communicates with the main pipe 131 through the water outlet 107 thereon.

[0056] The working principle of the vacuum dewatering equipment for the silt silty sand layer provided in the above embodiment is as follows:

[0057] First, the well point 101 is dug and the water storage tank 100 is dug near the well point 101, then the well pipe 102 is inserted into the well point 101, so that the water filtering section 106 on the well pipe 102 is located below the water level in the well point 101, then one end of the water suction pipe 118 is placed into the water storage tank 100, and the water suction pipe 118 and the communication pipe 133 are filled with water, so that the first slide column 109 and the second slide column 112 can move synchronously, and the communication pipe 133 can suck water when the communication pipe 133 communicates with the water storage tank 100 through the water suction pipe 118, to ensure normal use in the future.

[0058] Then, the main pipe 131 is connected with the water outlet 107 on each well pipe 102, the vacuum pump 130 is started, the vacuum pump 130 extracts vacuum inside the well pipe 102 through the main pipe 131, negative pressure is generated in the well pipe 102 and the water in the well point 101 is extracted into the well pipe 102 through the water filtering section 106, the water in the well pipe 102 continuously increases and then enters the main pipe 131 from the water outlet 107, and then is discharged into the water storage tank 100 through the vacuum pump 130.

[0059] After the water filtering section 106 works for a period of time, the impurities attached to the surface of the water filtering section 106 will gradually increase, and the degree of clogging of the water filtering section 106 will gradually increase. With the increase of the degree of clogging of the water filtering section 106, the pressure in the well pipe 102 gradually decreases, and the pulling force on the second sliding column 112 gradually increases. The second sliding column 112 slides in the second pipe 104 and moves towards the expansion pipe 129. The second sliding column 112 drives the first sliding column 109 away from the expansion pipe 129 through the communication pipe 133 and the water in the communication pipe 133. When the first sliding column 109 moves away from the expansion pipe 129, the sleeve pipe 105 slides upwards in the well pipe 102 and the first pipe 103, and the first hole 110 on the sleeve pipe 105 gradually separates from the water outlet 107.

[0060] With the upward movement of the sleeve pipe 105, the second sliding column 112 drives the top rod 123 to move and make the top rod 123 contact with the sleeve pipe 105. The fourth spring 125 is gradually compressed. When the first hole 110 separates from the water outlet 107, the vacuum pump 130 no longer extracts negative pressure inside the well pipe 102. At this time, the third hole 121 on the sleeve pipe 105 comes to the position corresponding to the top rod 123. The top rod 123 slides relative to the second sliding column 112 and penetrates through the third hole 121 to enter the sleeve pipe 105 under the action of the fourth spring 125. At the same time, the top rod 123 drives the elastic sheet 124 to move into the sleeve pipe 105. The elastic sheet 124 is extruded by the sleeve pipe 105 when passing through the third hole 121, and approaches the top rod 123, and restores after entering the inside of the sleeve pipe 105. The second sliding column 112 further approaches the expansion pipe 129 under the action of its own inertia and the fourth spring 125 when the water outlet 107 separates from the first hole 110. At this time, the second sliding column 112 separates from the second pipe 104 and enters the expansion pipe 129. The water in the communication pipe 133 connected part in the second pipe 104 enters the well pipe 102. At the same time, the second sliding column 112 drives the sliding sleeve 115 to slide on the second pull rod 111 through the third spring 116. The rubber block 119 on the sliding sleeve 115 separates from the stop ring 117. The communication pipe 133 and the inside of the well pipe 102 are connected with the water suction pipe 118. The water in the water suction pipe 118 is replenished into the communication pipe 133 and the well pipe 102. The sliding sleeve 115 approaches the second sliding column 112 under the action of the third spring 116. The second sliding column 112 returns to the second pipe 104 under the action of the second spring 114.

[0061] Then the first spring 113 starts to release energy, pushing the first slide column 109 to the expansion pipe 129, at this time the sleeve 115 and the second slide column 112 will not reset under the cooperation of the elastic sheet 124 and the sleeve 105, the pressure in the well pipe 102 increases, the water in the well pipe 102 is discharged into the well point 101 through the water filtering section 106, and the backflush cleaning of the water filtering section 106 is realized. When the first slide column 109 resets, it will abut against the elastic sheet 124, the elastic sheet 124 moves towards the jack 123 and no longer abuts against the sleeve 105, the second slide column 112 resets under the action of the second spring 114, the second slide column 112 drives the sleeve 115 to move synchronously, the rubber block 119 on the sleeve 115 contacts the stop ring 117 again to be clamped, and the connecting pipe 133 is disconnected from the water storage pool 100.

[0062] The sleeve 105 moves downward under the action of its own gravity, the first hole 110 is connected with the water outlet 107 again, and the vacuum pump 130 continues to extract the water in the well pipe 102.

[0063] The application also provides a vacuum dewatering process for a silt silty sand layer, which utilizes the vacuum dewatering equipment for a silt silty sand layer.

[0064] S1, a plurality of well points 101 are dug and arranged in sequence, the well points 101 are filled with sand and stones, and a water storage pool 100 is dug near the well points 101 to store the water extracted from the well points 101.

[0065] S2, one end of the well pipe 102 provided with the water filtering section 106 is placed into the well point 101, and the part where the first pipe 103 and the second pipe 104 are connected is filled with water; the water suction pipe 118 is connected with the second pipe 104, and the other end of the water suction pipe 118 is placed into the water storage pool 100.

[0066] S3, a vacuum mechanism is installed, which extracts the water in the well pipe 102 through negative pressure. The main pipe 131 is connected with each water outlet 107, the vacuum pump 130 is started, the vacuum pump 130 sucks the water in each well pipe 102 through the main pipe 131, and the water in the well pipe 102 is discharged into the water storage pool 100.

[0067] S4, if the filter section 106 is blocked, the vacuum mechanism continues to extract water in the well pipe 102, so that the pressure inside the well pipe 102 continues to decrease; the second piston is affected by the suction force of the vacuum mechanism and approaches the well pipe 102, and drives the first piston away from the well pipe 102 through the water in the communication pipe 133, and the energy storage assembly stores energy; in the process of water extraction by the vacuum pump 130, the filter section 106 filters the water in the well pipe 102, and the filter section 106 is easy to be blocked. With the increase of time, the water entering the well pipe 102 through the filter section 106 will decrease until completely blocked, and in this process, the vacuum pump 130 is always working, the pressure in the well pipe 102 will gradually decrease, and the second slide column 112 will approach the expansion pipe 129 in the second pipe 104 under the suction of the vacuum pump 130, and the first slide column 109 is driven to slide synchronously by the second slide column 112 under the action of water in the communication pipe 133, and the first slide column 109 gradually moves away from the expansion pipe 129 in the first pipe 103, at this time, the first spring 113 and the second spring 114 are compressed to start energy storage.

[0068] S5, the sleeve 105 blocks the water outlet 107, and the trigger assembly limits the position of the sleeve 105; the first slide column 109 drives the sleeve 105 to slide away from the expansion pipe 129, and the sleeve 105 slides to gradually move the first hole 110 away from the water outlet 107 until the first hole 110 is completely separated from the water outlet 107, and in the process, the second slide column 112 drives the top rod 123 to contact the sleeve 105 and compresses the fourth spring 125. When the first hole 110 is completely separated from the water outlet 107, the third hole 121 on the sleeve 105 is just moved to a position corresponding to the top rod 123, the top rod 123 is inserted into the sleeve 105 through the third hole 121 under the action of the fourth spring 125, and the spring piece 124 is also extruded by the sleeve 105 to deform and enter the sleeve 105 through the third hole 121, and the spring piece 124 entering the sleeve 105 loses the extrusion of the sleeve 105 and restores to abut against the inner wall of the sleeve 105. At this time, the sleeve 105 and the second slide column 112 cannot be reset.

[0069] S6, the impact assembly is started to make the communication pipe 133 communicate with the water storage pool 100, and the energy storage assembly releases energy; when the second slide column 112 slides, the third spring 116 is stretched, the sliding sleeve 115 has a tendency to approach the second slide column 112 under the tension, when the water outlet 107 is completely blocked, the third spring 116 drives the sliding sleeve 115 to separate from the blocking ring 117, the communication pipe 133 communicates with the water storage pool 100 through the water suction pipe 118, and the first spring 113 in the energy storage assembly releases energy to make the first slide column 109 approach the second slide column 112.

[0070] S7, the first piston resets, the pressure in the well pipe 102 increases, the water in the well pipe 102 is discharged from the filter section 106, and the filter section 106 is backflushed; while the first slide column 109 approaches the second slide column 112, the pressure in the well pipe 102 will increase, and the water in the well pipe 102 will be squeezed out from the filter section 106.

[0071] S8, the first piston reset triggers the second piston to reset under the action of the energy storage assembly, and the sleeve pipe 105 resets. When the first slide column 109 resets under the action of the first spring 113, it will abut against the spring sheet 124, the spring sheet 124 will no longer abut against the sleeve pipe 105 after being attached to the top rod 123, the second slide column 112 and the top rod 123 will reset under the pulling force of the third spring 116, the sleeve pipe 105 will separate from the top rod 123 and gradually reset under the action of its own gravity, so that the water outlet 107 is connected to the first hole 110.

[0072] The technical features of the above embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0073] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A vacuum dewatering device for silty sand layers, used to pump water from wellpoints into a storage tank, characterized in that, include: The system comprises a pipeline mechanism and a vacuum mechanism. The pipeline mechanism includes a well casing, a first pipe, a second pipe, a casing, an energy storage assembly, an impact assembly, and a triggering assembly. The lower end of the well casing has a filter section that extends into the well point, and the well casing has an outlet. One end of the first pipe and the second pipe are respectively connected to the upper end of the well casing. A first piston is installed inside the first pipe, and a second piston is installed inside the second pipe. The ends of the first and second pipes away from the well casing are connected by a connecting pipe filled with water. The connecting pipe can connect to a water storage tank. The diameter of the first pipe is smaller than that of the second pipe. When the filter section is blocked, the second piston slides towards the well casing within the second pipe and drives the first piston to slide away from the well casing within the first pipe. The casing is slidably disposed within the well casing and the first pipe and is slidably connected to the first piston. It is used to block the outlet when the first piston moves away from the well casing. The energy storage assembly is used to power the first and second pistons. Provides the power for reset; the impact assembly is used to connect the connecting pipe to the reservoir when the casing blocks the outlet; the trigger assembly is used to fix the position of the second piston and the casing when the outlet is blocked and to remove the restriction on the position of the second piston and the casing after the first piston is reset; the vacuum mechanism is used to draw water from the well pipe from the outlet and discharge it into the reservoir, and to store energy in the energy storage assembly when the filter section is blocked; the first piston includes a first pull rod and a first slide rod, the second piston includes a second pull rod and a second slide rod, the second pull rod passes through the second pipe and is slidably connected to the second pipe along the axial direction of the second pipe, the second slide rod is installed at the end of the second pull rod near the well pipe and can divide the second pipe into two chambers arranged along the axial direction of the second pipe, wherein one chamber away from the well pipe is connected to one chamber away from the well pipe in the first pipe through the connecting pipe between the first pipe and the second pipe; The impact assembly includes a sliding sleeve and a third spring. The sliding sleeve is fitted onto the second tie rod and slidably connected to it. The second pipe has an interface, and the connecting pipe is connected to the second pipe through the interface. The sliding sleeve is located in the second pipe and on the side of the interface away from the second sliding column. The third spring is fitted onto the second tie rod and connects the second sliding column and the sliding sleeve. A retaining ring is provided inside the second pipe. The sliding sleeve is located between the second sliding column and the retaining ring, and the sliding sleeve can engage with the retaining ring to further divide the chamber in the second pipe away from the well pipe into two smaller chambers that can be isolated from each other. A suction pipe connected to the water storage tank is provided on the second pipe, and the suction pipe is located on the side of the retaining ring away from the connecting pipe. The casing has a second hole and a third hole, with the second hole located above the third hole. A stop block is provided on the circumference of the first sliding column, and the stop block is slidably disposed in the second hole. The stop block is slidably connected to the casing and the first tube. When the first sliding column is in the initial position, the stop block is in the first tube. The triggering assembly includes a push rod, a spring, and a fourth spring. The push rod is slidably disposed on the second sliding column along the axial direction of the second tube. The spring is inclinedly disposed on the circumference of the push rod. The spring gradually approaches the second pull rod from the side closer to the push rod to the side farther away from the push rod. When the outlet is blocked, the push rod is slidably disposed in the third hole and is engaged with the casing by the spring and the casing. The second tube is located between the first tube and the well pipe. When the first sliding column is reset, it can abut against the spring. The fourth spring is sleeved on the push rod and connected to the push rod and the second sliding column.

2. The vacuum dewatering equipment for silty sand layers according to claim 1, characterized in that, The first tie rod passes through the first pipe and is slidably connected to the first pipe along its axial direction. The first pipe is coaxial with the well pipe. The first sliding rod is installed at the end of the first tie rod near the well pipe. The casing is sleeved on the first sliding rod and is slidably connected to the first pipe and the first sliding rod respectively. When the first sliding rod is away from the well pipe, it can abut against the casing. The first sliding rod and the casing divide the first pipe into two vertically arranged and mutually isolated chambers.

3. The vacuum dewatering equipment for silty sand layers according to claim 1, characterized in that, The energy storage component includes a first spring and a second spring. The first spring is sleeved on the first pull rod and connects the first tube and the first sliding column. The second spring is sleeved on the second pull rod and connects to the second tube and the second pull rod.

4. The vacuum dewatering equipment for silty sand layers according to claim 1, characterized in that, Positioning blocks are provided at one end of the first pull rod located outside the first tube and at one end of the second pull rod located outside the second tube, respectively, to limit the positions of the first and second sliding columns.

5. The vacuum dewatering equipment for silty sand layers according to claim 1, characterized in that, The upper end of the well casing is equipped with an expansion pipe. The first pipe and the second pipe are respectively connected to the expansion pipe and communicate with the well casing through the expansion pipe. The cross-sectional dimension of the expansion pipe is larger than the cross-sectional dimension of the first pipe and the second pipe.

6. The vacuum dewatering equipment for silty sand layers according to claim 1, characterized in that, The vacuum mechanism includes a vacuum pump and a main pipe, which are connected. There are multiple pipeline mechanisms, and the well pipe in each pipeline mechanism is connected to the main pipe through its outlet.

7. A vacuum dewatering process for silty sand layers, utilizing the vacuum dewatering equipment for silty sand layers according to any one of claims 1 to 6, characterized in that, The steps are as follows: S1, excavate well points and excavate a water storage tank near the well points; S2, place the end of the well pipe with the filter section into the well point, and fill the part where the first pipe and the second pipe connect with water; S3, Install a vacuum mechanism, which uses negative pressure to extract water from the well pipe; S4. If the filter section is blocked, the vacuum mechanism continues to extract water from the well pipe, causing the pressure inside the well pipe to continue to decrease. The second piston is attracted to the well pipe by the suction of the vacuum mechanism and drives the first piston away from the well pipe through the water inside the connecting pipe, and the energy storage component stores energy. S5, the sleeve blocks the outlet, triggering the component to restrict the sleeve position; S6, the impact component starts to connect the connecting pipe to the water storage tank, and the energy storage component releases energy; S7, the first piston resets, the pressure inside the well pipe increases, and water inside the well pipe is discharged from the filter section to backflush the filter section; S8, the first piston reset causes the second piston to reset under the action of the energy storage component through the trigger component, and the sleeve resets.

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