Drum grating self-cleaning and descaling device

Abstract

The utility model discloses a self-cleaning descaling device for a rotary drum grating. The self-cleaning descaling device comprises a long-strip-shaped mounting plate (1), a round bar (2) is arranged on the mounting plate (1), a plurality of scraping plates (7) which are arranged side by side are arranged on the round bar (2), the scraping plates (7) are rotationally connected with the round bar (2), the scraping plates (7) are connected with the round bar (2) in a sliding mode, angle limiting mechanisms are arranged on the scraping plates (7), and return springs (3) are arranged between the scraping plates (7) and the mounting plate (1). The section of the mounting plate (1) is in an inverted U shape, the round bar (2) is fixed to the bottom of a front side plate of the mounting plate (1), the fixing plates (4) are arranged at the two ends of the mounting plate (1), the front ends of the fixing plates (4) are fixed to the two side plates of the mounting plate (1), and the fixing holes (5) are formed in the rear ends of the fixing plates (4). The rotary drum grating has the advantages of being safe and labor-saving to use, capable of avoiding abrasion of the rotary drum grating and long in service life.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment equipment, and particularly relates to a self-cleaning and scale-removing device for a drum grille used in sewage treatment. Background Technique

[0002] Traditional water companies are mainly responsible for the supply of municipal tap water. With the development of society, many water companies are currently engaged in sewage treatment. In the process of sewage treatment, drum grilles are commonly used equipment, mainly for the solid-liquid separation of sewage and for fishing out larger-volume solid wastes in sewage.

[0003] Due to the complex composition of sewage, high hardness, and high SS content, the grille mesh on the drum grille is very easy to scale and become blocked. The structure of the grille mesh is as shown in Figure 3 and Figure 4 and includes multiple inner connecting rods evenly distributed circumferentially and multiple outer annular grille plates arranged circumferentially. The annular grille plates are fixed to the connecting rods, and the gaps between adjacent annular grille plates form channels for sewage and intercept larger-volume solid wastes. When the annular grille plates are scaled, the gaps disappear, causing blockage.

[0004] Currently, for blocked drum grilles, manual dredging is generally used, but this requires workers to enter the sewage area, which is somewhat dangerous and the dredging is relatively laborious. Content of the Utility Model

[0005] The purpose of the utility model is to provide a self-cleaning and scale-removing device for a drum grille. The utility model has the advantages of safe and labor-saving use, can avoid the wear of the drum grille, and has a relatively long service life.

[0006] The technical solution of the utility model: The self-cleaning and scale-removing device for a drum grille includes a long strip-shaped mounting plate. A round rod is provided on the mounting plate, and multiple scraper plates are arranged side by side on the round rod. The scraper plates are rotationally connected to the round rod and slidably connected to the round rod. An angle limiting mechanism is provided on the scraper plates, and a return spring is provided between the scraper plates and the mounting plate.

[0007] In the self-cleaning and scale-removing device for a drum grille described above, the cross-section of the mounting plate is inverted U-shaped. The round rod is fixed to the bottom of the front side plate of the mounting plate. Fixing plates are provided at both ends of the mounting plate. The front end of the fixing plate is fixed to the two side plates of the mounting plate, and a fixing hole is provided at the rear end of the fixing plate.

[0008] In the self-cleaning and scale-removing device for a drum grille described above, a reinforcing rod is provided between the front and rear side plates of the mounting plate, and the reinforcing rod is used to increase the structural strength of the mounting plate.

[0009] In the aforementioned self-cleaning and scale-removing device for a rotary drum grille, the return spring is a leaf spring. The cross-section of the return spring is an inverted U shape. The side plate at the rear of the return spring is fixed to the side plate at the rear of the mounting plate, and the side plate at the front of the return spring is elastically connected to the scraper.

[0010] In the aforementioned self-cleaning and scale-removing device for a rotary drum grille, an inclined slot is provided on the rear side wall of the scraper, and the side plate at the front of the return spring is inserted into the slot.

[0011] In the aforementioned self-cleaning and scale-removing device for a rotary drum grille, there are multiple return springs, and the multiple return springs are distributed along the length direction of the round bar. Along the length direction of the round bar, the scraper is divided into multiple groups, each group includes 4 - 10 scrapers, and each group of scrapers is correspondingly connected to a return spring.

[0012] In the aforementioned self-cleaning and scale-removing device for a rotary drum grille, a through hole through which the round bar passes is provided on the scraper. The angle limiting mechanism includes a V-shaped groove opened at the top of the scraper. The bottom of the V-shaped groove is connected to the through hole. The outer side wall of the front side of the V-shaped groove is attached to the outer side wall of the front side plate of the mounting plate, and a clearance space is formed between the inner side wall of the rear side of the V-shaped groove and the inner side wall of the front side plate of the mounting plate.

[0013] Compared with the prior art, the present utility model has the following advantages.

[0014] 1), By arranging multiple scrapers on the mounting plate, after the mounting plate is fixed to the rotary drum grille, the front end of the scraper can be inserted into the gaps of the grille of the rotary drum grille. During the rotation operation of the rotary drum, the scraper continuously cleans the scale, avoiding blockage, without the need for manual dredging, and is safe and effortless to use.

[0015] 2), By arranging an angle limiting mechanism on the scraper, the scraper can be kept rotating within a certain angle. When the rotary drum grille is bent and deformed axially, the scraper can rotate a certain angle to form a clearance, avoiding hard contact collision between the scraper and the rotary drum grille, avoiding wear of the rotary drum grille and improving the service life of the device.

[0016] 3), Since the scraper can move axially, when the annular grille plate on the rotary drum grille is deformed, the scraper can adaptively adjust its axial position, avoiding hard friction between the scraper and the annular grille plate, also avoiding wear of the rotary drum grille and improving the service life of the device.

[0017] 4), One return spring is correspondingly connected to 4 - 10 scrapers. On the basis of ensuring that the return spring has a certain width and is easy to be fixed to the mounting plate, when the scraper needs to rotate and make a clearance due to external force, since the width of the return spring is not very large, the pre-tightening force of the return spring will not be very large, ensuring that the scraper responds sensitively and rotates to make a clearance in time, which also guarantees and improves the service life of the device.

[0018] In summary, the utility model has the advantages of safe and effortless use, avoiding the wear of the drum grille, and having a relatively long service life. Description of the Drawings

[0019] Figure 1 It is the left view of the utility model.

[0020] Figure 2 It is the top view of the utility model.

[0021] Figure 3 It is the left view of the grille of the drum grille.

[0022] Figure 4 It is the front view of the grille of the drum grille.

[0023] The reference signs in the drawings are: 1 - mounting plate, 2 - round bar, 3 - return spring, 4 - fixing plate, 5 - fixing hole, 6 - reinforcing rod, 7 - scraper, 8 - slot, 9 - through hole, 10 - V-shaped groove, 11 - avoidance space, 12 - annular grille plate, 13 - connecting rod. Detailed Description of the Invention

[0024] The following further illustrates the utility model in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the utility model.

[0025] Embodiment. The self-cleaning and scale-removing device for the drum grille, as Figure 1 shown, includes a long strip-shaped mounting plate 1. The cross-section of the mounting plate 1 is inverted U-shaped. Fixing plates 4 are provided at both ends of the mounting plate 1. The front ends of the fixing plates 4 are welded and fixed to the two side plates of the mounting plate 1. Long strip-shaped fixing holes 5 are provided at the rear ends of the fixing plates 4.

[0026] A round bar 2 is fixed to the bottom of the front side plate of the mounting plate 1. A plurality of scrappers 7 arranged side by side are provided on the round bar 2. The scrappers 7 are rotationally connected to the round bar 2 and slidably connected to the round bar 2. An angle limiting mechanism is provided on the scrappers 7. A return spring 3 is provided between the scrappers 7 and the mounting plate 1. The number of the scrappers 7 corresponds to the number of the annular grille plates 12 on the drum grille, and the scrappers 7 can be inserted into the gaps between adjacent annular grille plates 12.

[0027] The return spring 3 is a leaf spring. The cross-section of the return spring 3 is inverted U-shaped. The rear side plate of the return spring 3 is fixed to the rear side plate of the mounting plate 1. The front side plate of the return spring 3 is elastically connected to the scraper 7. An inclined slot 8 is provided on the rear side wall of the scraper 7. The front side plate of the return spring 3 is inserted into the slot 8. Compared with the return spring 3 directly abutting against the rear side wall of the scraper 7, inserting the return spring 3 into the slot 8 can better ensure the perpendicularity between the scraper 7 and the round bar 2, making the movement of the scraper 7 in the axial direction smoother.

[0028] There are multiple return springs 3, which are distributed along the length of the round rod 2. A gap of about 0.5 mm is retained between adjacent return springs 3. In the length direction of the round rod 2, the scrapers 7 are divided into multiple groups, each group includes 4-10 scrapers 7, and each group of scrapers 7 is connected to a corresponding return spring 3.

[0029] A reinforcing rod 6 is provided between the front and rear side plates of the mounting plate 1, and the reinforcing rod 6 is used to increase the structural strength of the mounting plate 1 so that the mounting plate 1 is not easily opened and deformed. The reinforcing rod 6 is a stud, and the reinforcing rod 6 is locked on the mounting plate 1 by a nut.

[0030] The scraper 7 is provided with a through hole 9 through which the round rod 2 passes, and the angle limiting mechanism includes a V-shaped groove 10 opened on the top of the scraper 7, and the bottom of the V-shaped groove 10 is connected to the through hole 9. Under the preload of the return spring 3, the side wall of the front side of the V-shaped groove 10 fits with the outer side wall of the front side plate of the mounting plate 1, and the side wall of the rear side of the V-shaped groove 10 and the inner side wall of the front side plate of the mounting plate 1 form an escape space 11. Figure 1 In the state, the scraper 7 can rotate clockwise by a certain angle under the action of external force, and return to the state after the external force disappears.

[0031] How to use: Use bolts to pass through the fixing holes 4 to fix the self-cleaning and descaling device to the frame of the drum grille. After installation, keep the front end of the scraper 7 inserted into the annular grille 12 of the drum grille.

[0032] The insertion depth of the scraper 7 should be kept close to the rotating circumference of the connecting rod 13 of the drum grille but not in contact. When the drum grille is working, the scraper 7 continuously cleans the scale between the annular grille plates 12 to avoid clogging of the drum grille.

[0033] The utility model is a technical solution proposed in response to problems found in actual production and operation processes and is used in factory reconstruction projects with low reconstruction costs and good practicability.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

Claims

1. The drum grille self-cleaning and descaling device is characterized by: The invention comprises a long strip-shaped mounting plate (1), a round rod (2) is provided on the mounting plate (1), a plurality of scrapers (7) arranged side by side are provided on the round rod (2), the scrapers (7) are rotatably connected to the round rod (2), the scrapers (7) are slidably connected to the round rod (2), an angle limiting mechanism is provided on the scrapers (7), and a return spring (3) is provided between the scrapers (7) and the mounting plate (1).

2. The self-cleaning and descaling device for a rotary drum grill according to claim 1 is characterized in that: The cross section of the mounting plate (1) is an inverted U-shape, the round rod (2) is fixed to the bottom of the front side plate of the mounting plate (1), both ends of the mounting plate (1) are provided with fixing plates (4), the front end of the fixing plate (4) is fixed to the two side plates of the mounting plate (1), and the rear end of the fixing plate (4) is provided with a fixing hole (5).

3. The self-cleaning and descaling device for the rotary drum grille according to claim 2 is characterized in that: A reinforcing rod (6) is provided between the front and rear side plates of the mounting plate (1), and the reinforcing rod (6) is used to increase the structural strength of the mounting plate (1).

4. The self-cleaning and descaling device for a rotary drum grill according to claim 2 is characterized in that: The return spring (3) is a leaf spring, the cross section of the return spring (3) is an inverted U shape, the side plate on the rear side of the return spring (3) is fixed to the side plate on the rear side of the mounting plate (1), and the side plate on the front side of the return spring (3) is elastically connected to the scraper (7).

5. The self-cleaning and descaling device for a rotary drum grill according to claim 4 is characterized in that: An inclined slot (8) is provided on the rear side wall of the scraper (7), and the side plate on the front side of the return spring (3) is inserted into the slot (8).

6. The self-cleaning and descaling device for a rotary drum grill according to claim 4, characterized in that: There are a plurality of return springs (3), which are distributed along the length of the round rod (2). In the length direction of the round rod (2), the scrapers (7) are divided into a plurality of groups, each group including 4 to 10 scrapers (7), and each group of scrapers (7) is connected to a corresponding return spring (3).

7. The self-cleaning and descaling device for a rotary drum grill according to claim 2, characterized in that: The scraper (7) is provided with a through hole (9) through which the round rod (2) passes, and the angle limiting mechanism comprises a V-shaped groove (10) provided on the top of the scraper (7), the bottom of the V-shaped groove (10) is connected to the through hole (9), the side wall on the front side of the V-shaped groove (10) is in contact with the outer side wall of the front side plate of the mounting plate (1), and an escape space (11) is formed between the side wall on the rear side of the V-shaped groove (10) and the inner side wall of the front side plate of the mounting plate (1).

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