Primary filtering device for buried sewage treatment system

Abstract

A primary filtering device for a buried sewage treatment system comprises a filtering tank, a blocking net arranged in the filtering tank and mounted in a mounting frame I, and a lifting device for lifting the mounting frame I. The primary filtering device is characterized in that the blocking net is arranged in the filtering tank and mounted in the mounting frame I; the lifting device comprises a plurality of lifting chains connected with the first installation frame and a lifting motor used for enabling the lifting chains to ascend. The utility model solves the technical problem that the cleaning of the baffle net is influenced due to unsmooth rising of the baffle net.

Description

Technical Field

[0001] The utility model relates to a primary filtering device for an underground sewage treatment system, belonging to the field of underground sewage treatment. Background Art

[0002] In order to protect the ecological environment, the sewage generated in modern production and life needs to be treated before it can be discharged. The buried sewage treatment device is a common sewage treatment device. Compared with traditional sewage treatment equipment, the buried sewage treatment device has a huge advantage. Only some auxiliary buildings of the buried sewage treatment equipment are built on the ground, which occupies very little land and saves ground space. Greenery can be planted above the ground and parking lots can be built, etc. The environment is relatively beautiful.

[0003] Before the sewage is treated by biochemical reactions, it is necessary to filter and remove large-volume pollutants in the sewage. Although the buried sewage treatment device has the above-mentioned advantages, it is inconvenient to replace the filter screen used to filter pollutants in the water because it is buried under the ground. People are often required to go down to the treatment pool to operate, and it is very inconvenient to replace and clean the filter screen.

[0004] To this end, the Chinese patent with authorization announcement number CN220736535U discloses a pre-filter device for an underground sewage treatment device, including a shell, a baffle net is arranged on the inner side of the shell, a first connecting frame is fixedly connected to the outer side of the baffle net, a lifting device is arranged on the first connecting frame, a water outlet pipe is connected to one side of the middle part of the shell, a filter net is arranged at the connection between the water outlet pipe and the shell, a second connecting frame is fixedly connected to the outer side of the filter net, a connecting rod is telescopically arranged in the first connecting frame, a first connecting hole and a second connecting hole are arranged on the second connecting frame, and the connecting rod extends into the first connecting hole or the second connecting hole to drive the second connecting frame to move, a slide groove is arranged on the inner wall of the shell, and the bottom of the slide groove is connected to the water outlet pipe, and the lifting device includes a forward and reverse motor, the forward and reverse motor is arranged on the outer side of the shell, a first bevel gear is fixedly connected to the output shaft of the forward and reverse motor, a second bevel gear is meshed on the first bevel gear, a threaded rod is fixedly connected to the middle part of the second bevel gear, and the threaded rod is threadedly connected to one side of the first connecting frame. In short, the first connection frame is driven to rise by the rotation of the threaded rod, thereby raising the baffle net, so as to achieve the effect of conveniently cleaning the baffle net without going down into the treatment pool.

[0005] However, the following problems still exist: the threaded connection structure composed of the threaded rod in the lifting device and the first connecting frame is greatly affected by impurities such as mud and sand in the sewage, and it is very easy for the threads to get stuck, making it difficult for the retaining net to rise, affecting the cleaning efficiency of the retaining net. Utility Model Content

[0006] In view of the shortcomings of the prior art, the present application provides a primary filtration device for an underground sewage treatment system, which solves the technical problem that the barrier net is not smoothly raised and affects the cleaning of the barrier net.

[0007] A primary filtration device for an underground sewage treatment system comprises a filter tank, a retaining net arranged in the filter tank and installed in an installation frame, and a lifting device for raising and lowering the installation frame, wherein the lifting device comprises a plurality of lifting chains connected to the installation frame and a lifting motor for raising the lifting chains.

[0008] Preferably, two winding shafts are provided at the upper part of the interior of the filter tank, the lifting chains are arranged at the four corners of the mounting frame and are connected to the two winding shafts in pairs, and the two winding shafts are transmission-connected to the output shaft of the lifting motor through a transmission structure.

[0009] Preferably, the transmission structure comprises a worm and two worm wheels that cooperate with the worm, the two worm wheels are respectively mounted on the two winding shafts, and the worm is connected to the output shaft of the lifting motor.

[0010] Preferably, the number of the lifting chain is one, and the four sides of the mounting frame are provided with running wheels for running on the wall of the filter tank.

[0011] Preferably, the filter tank is also provided with a scraper for scraping off entanglements on the lifting chain.

[0012] Preferably, the scraper comprises a side scraper portion 1 and a side scraper portion 2, and the side scraper portion 1 and the side scraper portion 2 form a side opening.

[0013] Preferably, there are multiple scrapers arranged vertically, and the side openings on adjacent scrapers are oriented in opposite directions.

[0014] Preferably, a water outlet pipe is connected to the middle of the filter tank, a filter screen installed in the second installation frame is provided at the connection between the water outlet pipe and the filter tank, and a force-bearing part located above the first installation frame is provided on the bottom of the second installation frame.

[0015] In summary, the utility model has the following beneficial effects:

[0016] 1: The primary filter device in the utility model uses a chain in combination with a motor to lift a mounting frame, thereby ensuring that the retaining net rises smoothly and ensuring the cleaning efficiency of the retaining net.

[0017] 2: In the primary filter device of the present invention, a force-bearing portion located above the mounting frame 1 is provided on the bottom of the mounting frame 2, so that the mounting frame 1 can directly drive the mounting frame 2 to rise when it rises, and the filter net can be raised without any manual operation, which is convenient for cleaning the filter net.

[0018] 3: The primary filtering device in the utility model is provided with a scraper to scrape off the entangled objects on the lifting chain, thereby reducing the adverse effects of the entangled objects on the lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the primary filtration device in Example 1;

[0020] Figure 2 It is a connection diagram of multiple lifting chains in Example 1;

[0021] Figure 3 This is a schematic structural diagram of the primary filtration device in Example 2;

[0022] Figure 4 The schematic diagram of the structure of the scraper is shown in FIG.

[0023] Figure 5 The figure shows the arrangement of multiple scrapers. DETAILED DESCRIPTION

[0024] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0025] Example 1: Figure 1-2 As shown, a primary filtration device for an underground sewage treatment system comprises a filter tank 1, a retaining net 2 arranged in the filter tank 1 and installed in an installation frame 3, and a lifting device 4 for raising the installation frame 3. The retaining net 2 moves to the upper side of the filter tank 1 as the installation frame 3 moves to allow workers to clean it.

[0026] In this embodiment, a lifting device which is different from the prior art is adopted. The lifting device 4 includes a plurality of lifting chains 41 connected to the installation frame 3 and a lifting motor 42 which directly or indirectly lifts the lifting chain 41. When the lifting chain 41 rises, the installation frame 3 is driven to rise. The lifting motor 42 is connected to the pool wall of the filter pool 1 through a motor seat 42-1. The lifting device 4 uses a chain combined with a motor to lift the installation frame 3. Compared with the traditional threaded lifting method, it is less affected by impurities in the filter pool 1 and the lifting is smoother, thereby ensuring the cleaning efficiency of the retaining net.

[0027] In this embodiment, the lifting chain 41 is indirectly lifted by a lifting motor 42. For this purpose, two winding shafts 43 are provided on the upper side of the filter tank 1. Figure 1Due to the perspective, the two winding shafts 43 overlap, and an axle seat 1-1 for installing the winding shaft 43 is provided on the pool wall of the filter pool 1. There are four lifting chains 41, and the lifting chains 41 are arranged at the four corners of the installation frame 3 and are connected to the two winding shafts 43 in pairs. The two winding shafts 43 are connected to the output shaft of the lifting motor 42 through a transmission structure 44, so that one lifting motor 42 is used as a power source to lift the installation frame 3, with low energy consumption. At the same time, the four lifting chains 41 are lifted synchronously to prevent the installation frame 3 from tipping over, causing the debris trapped on the retaining net 2 to be poured into the lower part of the filter pool 1.

[0028] The transmission structure 44 includes a worm 441 and two worm wheels 442 that cooperate with the worm 441. The two worm wheels 442 are respectively installed on the two winding shafts 43. The worm 441 is installed on the wall of the filter tank 1 through a worm seat 443. The worm 441 is connected to the output shaft of the lifting motor 42. This transmission structure has a self-locking function that can stably keep the installation frame 3 at a fixed height in the filter tank 1 when the lifting motor 42 stops, which helps cleaning personnel to safely and reliably reach the installation frame 3 to clean the retaining net 2.

[0029] Of course, in other embodiments, the number of the lifting chain 41 is one, and the lifting chain 41 is directly connected to the output shaft of the lifting motor 42. At this time, in order to ensure that the installation frame 3 can be lifted and lowered stably, the installation frame 3 is provided with walking wheels that walk on the wall of the filter pool 1 around it.

[0030] In this embodiment, a plurality of vertical guide rods 3-1 are inserted into the mounting frame 3, which can effectively prevent the retaining net 2 from tipping over due to severe bias of impurities on the retaining net 2. The mounting frame 3 is provided with through holes for the vertical guide rods 3-1 to pass through. The diameter of the through holes should be appropriately larger than the size of the vertical guide rods 3-1 to prevent them from being stuck by impurities. A rod frame 3-2 for mounting the vertical guide rods 3-1 is provided on the wall of the filter pool 1.

[0031] In this embodiment, a water outlet pipe 61 is connected to the middle of the filter pool 1, and a filter screen 62 installed in a second installation frame 63 is provided at the connection between the water outlet pipe 61 and the filter pool 1. A slide groove 11 for clamping the second installation frame 63 is provided on the wall of the filter pool 1, and a force-bearing portion 64 located above the first installation frame 3 is provided on the bottom of the second installation frame 63. Therefore, when the first installation frame 3 rises, the first installation frame 3 contacts the force-bearing portion 64, directly driving the second installation frame 63 to rise. Without any manual operation, the filter screen 62 can be raised, which facilitates the cleaning of the filter screen 62.

[0032] Embodiment 2: Generally speaking, when sewage is poured into the filter tank 1, there is a risk that the lifting chain 41 is entangled or hung with ribbon-like / filamentary debris. In this case, when the debris is lifted to the winding shaft 43, there is also a risk of entanglement with the winding shaft 43. The double entanglement may directly affect the lifting of the lifting chain 41, especially when the winding shaft 43 on one side is wrapped with debris and the winding shaft 43 on the other side is not wrapped with debris, the lifting of the lifting chain 41 is more affected. For this reason, if Figure 3 As shown, a scraper 5 for scraping off entanglements on the lifting chain 41 is also provided in the filter tank 1, and the scraper 5 is connected to the inner wall of the filter tank 1 through a scraper seat 5-1.

[0033] like Figure 4 As shown, the scraper 5 includes a side scraper portion 1 51 and a side scraper portion 2 52, and the side scraper portion 1 51 and the side scraper portion 2 52 form a side opening 53, and the lifting chain 41 is in the side opening 53. The side opening 53 allows the debris scraped by the side scraper portion 1 51 and the side scraper portion 2 52 to be discharged laterally without being blocked. The side scraper portion 1 51 and the side scraper portion 2 52 both include a plurality of blade teeth 51-52 arranged linearly, and the blade teeth have blades 54, so that the scraper 5 can cut and scrape at the same time, thereby improving the scraping efficiency.

[0034] The scraper 5 is multiple in number and arranged vertically. Figure 5 As shown, the side openings 53 on the adjacent scrapers 5 are oriented in opposite directions, ensuring that the entangled debris on the lifting chain 41 is scraped off from both sides and completely.

[0035] The above embodiments are only for describing the preferred implementation of the utility model, and are not intended to limit the concept and scope of the utility model. Without departing from the design concept of the utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the utility model should fall within the protection scope of the utility model, and the technical contents of the utility model for protection have been fully recorded in the claims.

Claims

1. A primary filtration device for an underground sewage treatment system, comprising a filter tank (1), a retaining net (2) arranged in the filter tank (1) and installed in a mounting frame (3), and a lifting device (4) for lifting and lowering the mounting frame (3), characterized in that: The lifting device (4) comprises a plurality of lifting chains (41) connected to the installation frame 1 (3) and a lifting motor (42) for lifting the lifting chains (41).

2. A primary filtration device for an underground sewage treatment system according to claim 1, characterized in that: Two winding shafts (43) are provided at the upper part of the interior of the filter tank (1); the lifting chains (41) are arranged at the four corners of the mounting frame (3) and are connected to the two winding shafts (43) in pairs; the two winding shafts (43) are connected to the output shaft of the lifting motor (42) through a transmission structure (44).

3. A primary filtration device for an underground sewage treatment system according to claim 2, characterized in that: The transmission structure (44) comprises a worm (441) and two worm wheels (442) that are in transmission cooperation with the worm (441); the two worm wheels (442) are respectively mounted on the two winding shafts (43); and the worm (441) is connected to an output shaft of the lifting motor (42).

4. A primary filtration device for an underground sewage treatment system according to claim 2, characterized in that: The number of the lifting chain (41) is one, and the four sides of the mounting frame 1 (3) are provided with running wheels for running on the wall of the filter pool (1).

5. The primary filtration device for an underground sewage treatment system according to claim 1, characterized in that: A plurality of vertical guide rods (3-1) are also inserted into the installation frame 1 (3).

6. The primary filtration device for an underground sewage treatment system according to claim 1, characterized in that: The middle of the filter pool (1) is connected to a water outlet pipe (61), and a filter screen (62) installed in a second mounting frame (63) is provided at the connection between the water outlet pipe (61) and the filter pool (1). A slide groove (11) for clamping the second mounting frame (63) is provided on the pool wall of the filter pool (1), and a force-bearing portion (64) located above the first mounting frame (3) is provided on the bottom of the second mounting frame (63).

7. The primary filtration device for an underground sewage treatment system according to claim 1, characterized in that: The filter tank (1) is also provided with a scraper (5) for scraping off entanglements on the lifting chain (41).

8. A primary filtration device for an underground sewage treatment system according to claim 7, characterized in that: The scraper (5) comprises a side scraper portion 1 (51) and a side scraper portion 2 (52), wherein the side scraper portion 1 (51) and the side scraper portion 2 (52) form a side opening (53).

9. A primary filtration device for an underground sewage treatment system according to claim 8, characterized in that: The scrapers (5) are multiple in number and arranged vertically, and the side openings (53) on adjacent scrapers (5) are oriented in opposite directions.

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