A drainage and filtration device for connecting foundation pits to municipal pipe networks

Abstract

This utility model relates to the field of drainage filtration technology and discloses a drainage filtration device for connecting a foundation pit to a municipal pipe network. It includes a treatment tank with a mounting frame fixed on it. An inlet pipe is fixed to the mounting frame, and an outlet pipe connects to the treatment tank. A filter assembly is installed inside the treatment tank. The filter assembly includes a sleeve that rotates within the treatment tank, coaxially arranged with the inlet pipe. A screen cylinder is fixed to the bottom of the sleeve, and a discharge port is opened at the bottom of the screen cylinder. A T-shaped sealing plate is engaged inside the discharge port, and a blockage-clearing component is installed inside the screen cylinder. Compared to traditional simple mesh filtration methods, this utility model can effectively intercept solid impurities such as mud, sand, and gravel in foundation pit sewage, preventing impurities from entering the municipal pipe network and causing blockages. This ensures the normal water supply function of the municipal pipe network, reduces frequent maintenance operations caused by pipe network blockages, and lowers municipal maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of drainage filtration technology, specifically a drainage filtration device for connecting a foundation pit to a municipal pipe network. Background Technology

[0002] Drainage engineering is a project used to remove domestic sewage, various wastewaters from production, and excess surface water. It consists of drainage pipe systems, wastewater treatment plants, and final treatment facilities. Drainage filtration devices are key equipment used to solve the problem of sand and sludge clogging municipal pipe networks during foundation pit drainage, and are used to achieve efficient purification and compliant discharge of foundation pit wastewater.

[0003] Currently, traditional wastewater filtration methods mostly rely on simple fixed screens for interception. However, the large amount of solid impurities such as mud, sand, and gravel carried in the sewage from the foundation pit cannot be intercepted by a static screen alone. This leads to the accumulation of impurities, which in turn affects the permeability of the wastewater and causes the filtration rate to continuously decline. This fails to meet the continuous drainage needs of the foundation pit, affecting not only the normal water transport function of the pipeline network but also requiring frequent maintenance work and increasing municipal maintenance costs.

[0004] Therefore, we propose a drainage and filtration device that connects the foundation pit to the municipal pipe network in order to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a drainage and filtration device that connects the foundation pit to the municipal pipe network, so as to solve the problems mentioned in the background art, such as poor filtration effect of existing devices, easy blockage after long-term use, reduced filtration rate, and inability to meet the continuous drainage needs of the foundation pit.

[0006] This utility model provides the following technical solution: a drainage and filtration device for connecting a foundation pit to a municipal pipeline network, comprising a treatment tank, a mounting frame fixed on the treatment tank, an inlet pipe fixed on the mounting frame, an outlet pipe connected to the treatment tank, a filtration assembly installed inside the treatment tank, the filtration assembly comprising a sleeve that rotates inside the treatment tank, the sleeve being coaxially arranged with the inlet pipe, a screen cylinder fixed at the bottom of the sleeve, a discharge port at the bottom of the screen cylinder, a T-shaped sealing plate being engaged inside the discharge port, and a blockage clearing component installed inside the screen cylinder.

[0007] Preferably, a motor is fixed on the mounting bracket, a drive shaft is fixed to the output end of the motor, a drive gear is fixedly sleeved on the outer ring of the drive shaft, a support shaft is fixed to the surface of the treatment tank, the support shaft is hollow inside, a driven gear rotates on the support shaft, and the drive gear and the driven gear mesh with each other.

[0008] Preferably, the bottom surface of the screen cylinder is provided with an insertion hole, and the T-shaped sealing plate is provided with a through hole, and bolts are installed in both the through hole and the insertion hole.

[0009] Preferably, the unclogging assembly includes a sleeve fixedly fitted onto the outer ring of the water inlet pipe, a support rod fixed to one end of the sleeve, a cavity opened inside the support rod, a plurality of springs fixed inside the cavity, a scraper fixed to one end of the plurality of springs, and the scraper slidably connected to the cavity.

[0010] Preferably, the outer wall of the scraper slides in contact with the inner wall of the screen cylinder.

[0011] Preferably, the bottom of the processing tank is connected to a discharge pipe, a sealing plug is snapped into the discharge pipe, and an expansion sealing strip is adhered to the outer ring of the sealing plug.

[0012] This utility model has the following beneficial effects:

[0013] 1. Compared with traditional simple mesh filtration methods, this device can effectively intercept solid impurities such as mud, sand and gravel in the sewage of the foundation pit, prevent impurities from entering the municipal pipe network with the sewage and causing blockage, ensure the normal water supply function of the municipal pipe network, reduce frequent maintenance operations caused by pipe network blockage, and reduce municipal maintenance costs.

[0014] 2. This device, through its centrifugal filtration design, further enhances the interception of impurities, especially fine particles that easily penetrate ordinary filter screens. This ensures that the treated wastewater from the foundation pit meets the standards for connection to the municipal sewer network, complies with drainage compliance requirements, and helps construction companies avoid environmental penalties. Furthermore, the sealing plug and expansion sealing strip inside the discharge pipe at the bottom of the treatment tank optimize the device's sealing structure, solving the problem of inadequate sealing of the discharge channel in traditional devices. This effectively prevents wastewater leakage, avoiding pollution of surrounding soil and groundwater, and preventing safety hazards caused by soaking the foundation. It also reduces the manpower and material resources required for leak repair, further lowering subsequent maintenance costs.

[0015] 3. During the filtration process, this device simultaneously removes fine impurities adhering to the screen mesh, preventing clogging at the source that could reduce wastewater flow and filtration efficiency. This allows the device to maintain stable filtration performance over the long term, making it well-suited for long-term, high-load foundation pit drainage scenarios. It eliminates the need for frequent shutdowns to address blockages. Furthermore, compared to the cumbersome disassembly of the entire filter assembly required by traditional devices, this device can quickly remove accumulated impurities, simplifying the cleaning process. This not only shortens maintenance time but also reduces the intensity of manual disassembly and operation, minimizing the impact of maintenance work on the foundation pit drainage progress and further improving overall construction efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2This is an overall sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram of the filter assembly structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the unblocking component of this utility model.

[0020] Figure 5 For the present utility model Figure 4 Partial sectional view.

[0021] Figure 6 For the present utility model Figure 5 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Processing tank; 2. Mounting frame; 3. Inlet pipe; 4. Outlet pipe; 5. Filter assembly; 51. Motor; 52. Drive shaft; 53. Drive gear; 54. Support shaft; 55. Driven gear; 56. Sleeve; 57. Screen cylinder; 58. Discharge port; 59. Insertion hole; 510. T-shaped sealing plate; 511. Through hole; 512. Bolt; 6. Unblocking assembly; 61. Sleeve; 62. Support rod; 63. Cavity; 64. Spring; 65. Scraper; 7. Discharge pipe; 8. Sealing plug; 9. Expansion sealing strip. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] This embodiment aims to address the problem of poor impurity interception in traditional drainage filtration methods, which makes it difficult to achieve compliant connection between foundation pit sewage and municipal pipe networks. Please refer to [link / reference]. Figure 1 - Figure 3 A drainage filtration device for connecting a foundation pit to a municipal pipeline network includes a treatment tank 1, a mounting frame 2 fixed on the treatment tank 1, an inlet pipe 3 fixed on the mounting frame 2, an outlet pipe 4 connected to the treatment tank 1, a filter assembly 5 installed inside the treatment tank 1, the filter assembly 5 including a sleeve 56 that rotates inside the treatment tank 1, the sleeve 56 being coaxially arranged with the inlet pipe 3, and a screen cylinder 57 fixed at the bottom of the sleeve 56.

[0026] A motor 51 is fixed on the mounting bracket 2. A drive shaft 52 is fixed to the output end of the motor 51. A drive gear 53 is fixedly sleeved on the outer ring of the drive shaft 52. A support shaft 54 ​​is fixed to the surface of the treatment tank 1. The support shaft 54 ​​is hollow and a driven gear 55 rotates on the support shaft 54. The drive gear 53 and the driven gear 55 mesh with each other. A discharge pipe 7 is connected to the bottom of the treatment tank 1. A sealing plug 8 is snapped into the discharge pipe 7. An expansion sealing strip 9 is glued to the outer ring of the sealing plug 8. The sealing plug 8 snapped into the discharge pipe 7 and the expansion sealing strip 9 glued to the outer ring of the sealing plug 8 form a double sealing guarantee. In the non-cleaning state, it can tightly seal the discharge pipe 7, effectively preventing sewage from the treatment tank 1 from leaking from the discharge pipe 7, avoiding sewage leakage from polluting the surrounding soil and construction environment, and eliminating the need for frequent leakage treatment.

[0027] In this embodiment: When in use, the sewage in the pit is first precisely connected to the inlet pipe 3 on the mounting frame 2 through the external conveying pipeline, and then flows steadily into the treatment tank 1 along the inlet pipe 3. Since the sleeve 56 in the filter assembly 5 is coaxial with the inlet pipe 3, the sewage will be directly guided and flow into the sleeve 56.

[0028] At this time, the motor 51 fixed on the mounting bracket 2 is started. The output end of the motor 51 will drive the transmission shaft 52 to rotate synchronously. The drive gear 53 fixedly sleeved on the outer ring of the transmission shaft 52 will rotate accordingly. Since the drive gear 53 meshes with the driven gear 55 on the support shaft 54 ​​on the surface of the processing tank 1, the rotational force of the drive gear 53 will be accurately transmitted to the driven gear 55, driving the driven gear 55 to rotate stably around the support shaft 54. The driven gear 55 and the sleeve 56 are integrated, and its rotation will synchronously drive the sleeve 56 and the bottom of the sleeve 56. The screen cylinder 57 rotates at high speed. Under the action of centrifugal force, the sewage inside the screen cylinder 57 is quickly thrown out. At the same time, the mesh structure of the screen cylinder 57 can effectively intercept solid impurities such as mud, sand and gravel mixed in the sewage, preventing the impurities from migrating with the water flow. The clean water after interception and filtration will pass through the filter screen and enter the annular cavity 63 between the treatment tank 1 and the screen cylinder 57. Finally, it will be smoothly discharged into the municipal pipe network along the outlet pipe 4 connected to the treatment tank 1, effectively realizing the compliant connection of the foundation pit sewage to the municipal pipe network and ensuring the safe operation of the municipal pipe network.

[0029] Example 2:

[0030] This embodiment aims to address the problem that existing filter structures are prone to clogging due to impurities, leading to reduced filtration efficiency and inability to meet the demands of long-term, high-load foundation pit drainage scenarios. This embodiment is an improvement upon Embodiment 1. For details, please refer to [link to Embodiment 1]. Figure 1 - Figure 6 The bottom of the screen cylinder 57 is provided with a discharge port 58, and a T-shaped sealing plate 510 is snapped into the discharge port 58. The bottom surface of the screen cylinder 57 is provided with an insertion hole 59, and a through hole 511 is provided on the T-shaped sealing plate 510. Bolts 512 are installed in both the through hole 511 and the insertion hole 59.

[0031] A blockage-clearing component 6 is installed inside the screen cylinder 57. The blockage-clearing component 6 includes a sleeve 61 that is fixedly fitted onto the outer ring of the water inlet pipe 3. A support rod 62 is fixed to the end of the sleeve 61. A cavity 63 is opened inside the support rod 62. Multiple springs 64 are fixed inside the cavity 63. A scraper 65 is fixed to the end of the multiple springs 64. The scraper 65 is slidably connected to the cavity 63. The outer wall of the scraper 65 slides against the inner wall of the screen cylinder 57.

[0032] In this embodiment: the sewage from the foundation pit is first connected to the inlet pipe 3 on the mounting frame 2 via an external conveying pipeline. After flowing into the treatment tank 1 along the inlet pipe 3, it enters the screen cylinder 57 under the guidance of the sleeve 56. At the same time, the motor 51 is started. The motor 51 drives the drive gear 53 to rotate through the transmission shaft 52. The drive gear 53 meshes with the driven gear 55 to drive the sleeve 56 and the screen cylinder 57 to rotate at high speed. The sewage is thrown out by centrifugal force. The mesh of the screen cylinder 57 intercepts solid impurities such as mud, sand and gravel. After filtration, the clean water enters the annular cavity 63 of the treatment tank 1 and the screen cylinder 57, and is finally discharged into the municipal pipe network through the outlet pipe 4.

[0033] During the filtration process, the sleeve 61 is fixedly fitted onto the outer ring of the inlet pipe 3 and remains stationary with the inlet pipe 3. The support rod 62 on the end side of the sleeve 61 has a cavity 63 inside. Multiple springs 64 in the cavity 63 always apply a pressing force to the scraper 65 towards the inner wall of the screen cylinder 57, so that the outer wall of the scraper 65 is in close contact with the inner wall of the screen cylinder 57. When the screen cylinder 57 rotates at high speed, the scraper 65 slides relative to the inner wall of the screen cylinder 57. The scraper 65 will scrape off the fine impurities attached to the mesh of the screen cylinder 57, avoiding impurities clogging the mesh and causing a decrease in filtration efficiency. Even if the impurities in the sewage are highly viscous, the elastic buffer of the springs 64 can ensure that the scraper 65 always fits against the inner wall of the screen cylinder 57, continuously keeping the mesh unobstructed, and achieving simultaneous filtration and unclogging.

[0034] When the impurities intercepted in the screen cylinder 57 accumulate to a certain amount, first turn off the motor 51 and the water inlet pipe 3, and unscrew the bolts 512 in the insertion hole 59 on the bottom surface of the screen cylinder 57 and the through hole 511 of the T-shaped sealing plate 510. The connection structure of the bolts 512 can ensure that the T-shaped sealing plate 510 is tightly locked in the discharge port 58 when not discharging impurities, preventing sewage from leaking from the discharge port 58 and ensuring the sealing of the device. After removing the bolts 512, remove the T-shaped sealing plate 510. The impurities accumulated in the screen cylinder 57 will fall directly from the discharge port 58 into the bottom of the treatment tank 1 under its own weight and the slight shaking of the screen cylinder 57, and then be discharged through the discharge pipe 7 at the bottom of the treatment tank 1. This design not only reduces the amount of impurities remaining in the screen cylinder 57, but also eliminates the need to disassemble the entire filter assembly 5, greatly simplifying the cleaning process and shortening the maintenance time. After cleaning, re-lock the T-shaped sealing plate 510 into the discharge port 58 and tighten the bolts 512 to restore the normal operation of the device.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A drainage filtration device for connecting a foundation pit to a municipal pipeline network, comprising a treatment tank (1), characterized in that: The treatment tank (1) is fixed with a mounting bracket (2), the mounting bracket (2) is fixed with a water inlet pipe (3), the treatment tank (1) is connected with a water outlet pipe (4), a filter assembly (5) is installed inside the treatment tank (1), the filter assembly (5) includes a sleeve (56) that rotates inside the treatment tank (1), the sleeve (56) is coaxially arranged with the water inlet pipe (3), a screen cylinder (57) is fixed at the bottom of the sleeve (56), a discharge port (58) is opened at the bottom of the screen cylinder (57), a T-shaped sealing plate (510) is snapped into the discharge port (58), and a blockage removal assembly (6) is installed inside the screen cylinder (57).

2. The drainage filtration device for connecting a foundation pit to a municipal pipeline network according to claim 1, characterized in that: A motor (51) is fixed on the mounting bracket (2). A transmission shaft (52) is fixed to the output end of the motor (51). A drive gear (53) is fixedly sleeved on the outer ring of the transmission shaft (52). A support shaft (54) is fixed on the surface of the treatment tank (1). The support shaft (54) is hollow inside. A driven gear (55) rotates on the support shaft (54). The drive gear (53) and the driven gear (55) mesh with each other.

3. The drainage filtration device for connecting a foundation pit to a municipal pipeline network according to claim 2, characterized in that: The bottom surface of the screen cylinder (57) is provided with an insertion hole (59), and the T-shaped sealing plate (510) is provided with a through hole (511). Bolts (512) are installed in both the through hole (511) and the insertion hole (59).

4. The drainage filtration device for connecting a foundation pit to a municipal pipeline network according to claim 1, characterized in that: The unblocking component (6) includes a sleeve (61) fixedly sleeved on the outer ring of the water inlet pipe (3). A support rod (62) is fixed on the end side of the sleeve (61). A cavity (63) is opened in the support rod (62). Multiple springs (64) are fixed in the cavity (63). A scraper (65) is fixed on the end side of the multiple springs (64). The scraper (65) is slidably connected to the cavity (63).

5. A drainage filtration device for connecting a foundation pit to a municipal pipeline network according to claim 4, characterized in that: The outer wall of the scraper (65) slides in contact with the inner wall of the screen cylinder (57).

6. The drainage filtration device for connecting a foundation pit to a municipal pipeline network according to claim 1, characterized in that: The bottom of the processing tank (1) is connected to a discharge pipe (7), and a sealing plug (8) is inserted into the discharge pipe (7). An expansion sealing strip (9) is adhered to the outer ring of the sealing plug (8).

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