Center transmission mud scraper with adjustable main shaft

Abstract

The utility model discloses a center transmission mud scraper with an adjustable main shaft, and belongs to the field of sewage treatment equipment. The mud scraper comprises a main shaft and a driving mechanism for driving the main shaft to rotate and further comprises an adjustable connecting shaft assembly, the adjustable connecting shaft assembly comprises a shaft distance adjustable coupler, the shaft distance adjustable coupler is of a Schmidt coupler type structure, the input end of the shaft distance adjustable coupler is fixedly connected with the output end of the driving mechanism, and the output end of the shaft distance adjustable coupler is fixedly connected with the main shaft through a connecting shaft. And a sliding bearing and a bearing seat are mounted outside the connecting shaft. According to the mud scraper, the adjustable coupling assembly is arranged between the driving mechanism and the main shaft, so that the driving mechanism and the main shaft within a certain shaft distance range can be in transmission connection, the adaptability of the mud scraper is improved, meanwhile, a sliding bearing for rotationally supporting the main shaft is arranged in an upward moving mode, and installation of an underwater bearing is omitted.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment equipment technical field more specifically, relate to a main shaft adjustable center drive mud scraper. BACKGROUND

[0002] Mud scraper is a commonly used sewage treatment equipment, mainly applied in sedimentation tank, the sludge settled in the pool bottom is scraped to the sludge collecting pit, so as to subsequent processing, which is widely used in municipal sewage treatment plant, waterworks and other industrial wastewater treatment plant etc.

[0003] At present, the sedimentation tank in sewage treatment plant generally adopts the pool body structure of reinforced concrete. Due to the uneven construction level of construction units, the manufacturing precision of reinforced concrete pool body usually cannot meet the design requirements, which is specifically manifested as follows: the reserved mounting hole at the top of the sedimentation tank, the eccentricity of the shaft spacing caused by the different center of the circular mud bucket at the bottom of the pool and the non-parallel of the axis of the reserved mounting hole, the bottom of the pool and the circular mud bucket at the bottom of the pool. In the above cases, since the main shaft of the existing mud scraper is rigidly connected with the main shaft of the driving device, when the driving device is leveled, the axis of the mud scraper main shaft is not parallel to the circular pool bottom or the mud bucket at the bottom of the pool, so that the underwater bearing supporting the mud scraper main shaft cannot be installed, the on-site adjustment process is complicated, time-consuming and laborious, and the overall operation effect of the mud scraper after adjustment is greatly affected.

[0004] Through retrieval, the patent application case with the publication number CN106621491A discloses a suspension type center drive mud scraper, which comprises a sedimentation tank, a working bridge, a driving device, a transmission vertical shaft, a gear, a scraper arm and a scraper plate, a center mud leakage bucket and a skimming device. The gear comprises a large gear and a small gear which are meshed with each other. The small gear is connected with the driving device, and the large gear is fixed on the transmission vertical shaft. The small gear rotates by the driving force provided by the driving device, drives the large gear connected with the transmission vertical shaft to rotate, and makes the transmission vertical shaft rotate to start the mud scraping operation. In the application case, since the gear assembly is adopted, the installation precision requirement is high. When the shaft spacing is offset due to the machining precision limitation of different sedimentation tanks, the gear assembly needs to be replaced, so that the adaptability of the ordinary center drive mud scraper is not high. TECHNICAL SOLUTION

[0005] The utility model aims at providing a main shaft adjustable center drive mud scraper, so as to solve the technical problem that the existing mud scraper cannot be effectively applied to multiple sedimentation tanks with different shaft spacing offset. In addition, the utility model can also solve the problem that the underwater bearing cannot be installed due to the non-parallel of the axis of the reserved mounting hole at the top of the sedimentation tank and the circular mud bucket at the bottom of the pool, the on-site adjustment process is complicated, time-consuming and laborious.

[0006] To achieve the above purpose, the technical scheme provided by the utility model is as follows:

[0007] The utility model discloses a main shaft adjustable center transmission mud scraper, including main shaft and drive mechanism of driving main shaft rotation, still include adjustable connecting shaft subassembly, this adjustable connecting shaft subassembly includes axle distance adjustable coupling, axle distance adjustable coupling adopts schmidt coupling formula structure, its input and the solid connection of drive mechanism's output, its output is fixed with main shaft through connecting shaft, and the outside installation of connecting shaft has sliding bearing and bearing seat.

[0008] Further, the bearing seat is a split structure composed of two left-right symmetrical bearing parts, and the two bearing parts surround a mounting hole for mounting the sliding bearing.

[0009] Further, the bearing part is in L-shaped structure, which includes a connecting column and a connecting horizontal plate fixedly connected to the lower part of the connecting column, and the abutting surfaces of the connecting horizontal plates of the two bearing parts are respectively provided with semicircular accommodating grooves for placing the sliding bearings.

[0010] Further, the abutting surfaces of the two connecting horizontal plates are extended to both sides to form seat abutting plates, and the seat abutting plates are correspondingly processed with fixing holes.

[0011] Further, the top of each of the two connecting columns is provided with a pool connecting plate for fixedly mounting the bearing seat.

[0012] Further, the sliding bearing is in split structure.

[0013] Further, the axle distance adjustable coupling includes a first end plate, a middle plate and a second end plate arranged in sequence from top to bottom, and the output end of the drive mechanism drives the transmission shaft to rotate, wherein the middle plate is hingedly connected to the first end plate and the second end plate through three connecting rods. The first end plate is connected to the output end of the drive mechanism through the transmission shaft, and the second end plate is connected to the main shaft through the connecting shaft.

[0014] Further, the first end plate, the middle plate and the second end plate are rotatably connected to the connecting rods through pins, and the two ends of the pins are limited by hole elastic retaining rings, and a shaft sleeve is arranged between the pin and the hinged connection hole of the pin, and the shaft sleeve is a straight column type powder metallurgy copper sleeve.

[0015] Further, the output end of the drive mechanism drives the transmission shaft to rotate through a gear transmission mechanism, a chain transmission mechanism or a belt transmission mechanism, and the transmission shaft is fixedly connected to the input end of the axle distance adjustable coupling.

[0016] Further, the mud scraper further includes a scraper arm, a supporting arm and a mud bucket scraper plate arranged in sequence from top to bottom on the main shaft, and the scraper arm and the supporting arm are arranged in cross shape, and a plurality of scraper plates are distributed on the scraper arm.

[0017] Compared with the prior art, the technical scheme has the following beneficial effects:

[0018] (1) The mud scraper main shaft and the driving mechanism output end transmission connection mode is optimized, the shaft distance adjustable coupling is used for transmission connection, a single adjustable coupling can adapt to the shaft distance of the mud scraper main shaft and the driving mechanism output end within a certain range, thereby the shaft distance offset problem of the pool top reserved mounting hole and the pool bottom circular mud bucket within a certain range in the multiple sedimentation tanks is solved, the installation precision and adaptability of the mud scraper are improved.

[0019] (2) The support mode of the main shaft is further optimized, the output end of the shaft distance adjustable coupling is fixedly connected with the main shaft through the connecting shaft, the connecting shaft is externally provided with a sliding bearing and a bearing seat, the connecting shaft is rotationally supported, the main shaft is indirectly rotationally supported, the purpose of the main shaft being arranged on the rotation supporting part is achieved, thereby the underwater bearing assembly can be cancelled, the problem that the underwater bearing cannot be installed due to the non-parallelism of the pool bottom and the pool top of the traditional center transmission mud scraper is solved, the main shaft transmission stability is not blocked, and the service life of the whole machine is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the main shaft adjustable center transmission mud scraper in the embodiment of the utility model.

[0021] Figure 2 It is a structure schematic view of the adjustable connecting shaft assembly in the embodiment of the utility model.

[0022] Figure 3 It is a top view structure schematic view of the shaft distance adjustable coupling in the embodiment of the utility model.

[0023] Figure 4 It is a front view structure schematic view of the shaft distance adjustable coupling in the embodiment of the utility model.

[0024] Figure 5 It is Figure 4 It is an enlarged structure schematic view of position A in the embodiment of the utility model.

[0025] Figure 6 It is a structure schematic view of the bearing seat in the embodiment of the utility model.

[0026] Figure 7 It is a structure schematic view of the sliding bearing in the embodiment of the utility model.

[0027] Label explanation:

[0028] 1, driving mechanism;

[0029] 2, adjustable connecting shaft assembly; 201, adjustable shaft coupling; 2011, first end plate; 2012, middle plate; 2013, second end plate; 2014, elastic baffle ring for hole; 2015, shaft sleeve; 2016, pin shaft; 202, bearing seat; 2021, connecting column; 2022, connecting cross plate; 2023, seat body butt joint plate; 2024, pool body connecting plate; 203, sliding bearing; 204, connecting shaft;

[0030] 3, main shaft;

[0031] 4, support arm;

[0032] 5, scraper arm;

[0033] 6, bucket scraper;

[0034] 7, scraper;

[0035] 8, transmission shaft. DETAILED DESCRIPTION

[0036] In order to further understand the content of the present application, the present application will be described in detail in conjunction with the drawings and examples.

[0037] The structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the limiting conditions of the implementation of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like in the specification are only for the convenience of clear description, and are not used to limit the scope of implementation, and the change or adjustment of the relative relationship is also considered as the implementation of the present application without changing the technical content.

[0038] Reference Figure 1 、 Figure 2 As shown in the drawings, the present embodiment provides a main shaft adjustable center transmission mud scraper, which comprises a main shaft 3 and a driving mechanism 1 for driving the main shaft 3 to rotate, and further comprises an adjustable connecting shaft assembly 2, which comprises an adjustable shaft coupling 201. The adjustable shaft coupling 201 adopts a Schmidt coupling structure, the input end of which is fixedly connected with the output end of the driving mechanism 1, the output end thereof is fixedly connected with the main shaft 3 through a connecting shaft 204, and the outer part of the connecting shaft 204 is provided with a sliding bearing 203 and a bearing seat 202. Through the above structure, the driving mechanism 1 transmits power to the main shaft 3 through the adjustable shaft coupling 201 and the connecting shaft 204.

[0039] For the installation environment of multiple mud scrapers, the specific shaft distance offset of the reserved installation hole on the top of the multiple sedimentation tanks and the circular mud bucket at the bottom is different. The shaft distance adjustable coupling 201 can change the shaft distance offset between the input end and the output end within a certain range during installation, and is infinitely adjustable. Specifically, the input end of the shaft distance adjustable coupling 201 is coaxially arranged with the output end of the driving mechanism 1, that is, it is adapted to the reserved installation hole on the top of the tank. The output end of the shaft distance adjustable coupling 201 is coaxially arranged with the main shaft 3, that is, it is adapted to the axis of the circular mud bucket at the bottom of the tank, so as to adapt to the application environment of different shaft distance offsets of the reserved installation hole on the top of the multiple sedimentation tanks and the circular mud bucket at the bottom. In addition, the outer part of the connecting shaft 204 is provided with a sliding bearing 203 and a bearing seat 202. The connecting shaft 204 is rotatably installed in the sliding bearing 203. The sliding bearing 203 rotatably supports the connecting shaft 204, and indirectly rotatably supports the main shaft 3. The rotatable support part of the main shaft 3 is moved upwards, that is, the sliding bearing 203 and the bearing seat 202 are moved upwards, so that the underwater bearing is cancelled.

[0040] It should be understood that the fixed connection between the input end of the shaft distance adjustable coupling 201 and the output end of the driving mechanism 1 can be direct connection or indirect connection through other connecting members. Preferably, the output shaft of the driving mechanism 1 drives the transmission shaft 8 to rotate through a gear transmission mechanism, a chain transmission mechanism or a belt transmission mechanism. The transmission shaft 8 is fixedly connected with the input end of the shaft distance adjustable coupling 201, so as to realize the fixed connection between the input end of the shaft distance adjustable coupling 201 and the output end of the driving mechanism 1, so that the driving mechanism 1 can drive the input end of the shaft distance adjustable coupling 201 to rotate.

[0041] In this embodiment, the specific structure of the shaft distance adjustable coupling 201 is shown in FIGS. 1 to 3, which includes a first end plate 2011, a middle plate 2012 and a second end plate 2013 arranged in sequence from top to bottom. The first end plate 2011, the second end plate 2013 and the middle plate 2012 are all provided with three hinge connection holes which are distributed at intervals along the vertical direction at the edges thereof. The middle plate 2012 is hingedly connected with the first end plate 2011 and the second end plate 2013 through three connecting rods. Figure 3 , Figure 4 The Schmidt coupling type structure of the shaft distance adjustable coupling 201 is a prior art, and the remaining detailed structure will not be described in detail here. Correspondingly, the central connection hole of the first end plate 2011 is coaxially arranged with and fixedly connected with the transmission shaft 8, so that the rotation of the driving mechanism 1 is transmitted to the output end of the shaft distance adjustable coupling 201.

[0042] The shaft distance adjustable coupling 201 allows the distance between the first end plate 2011 and the second end plate 2013 to change within a certain range during installation, and is infinitely adjustable. Specifically, the center connecting hole of the first end plate 2011 is coaxially arranged with the transmission shaft 8, i.e. adapted to the installation hole reserved on the pool top, and the center of the second end plate 2013 is coaxially arranged with the main shaft 3, i.e. adapted to the axis of the circular mud bucket at the bottom of the pool, so as to adapt to the application environment in which the shaft distance between the installation hole reserved on the pool top and the circular mud bucket at the bottom of the pool is different.

[0043] The first end plate 2011, the middle plate 2012 and the second end plate 2013 are connected with the connecting rod through the pin shaft 2016 corresponding to the rotating mechanism. Specifically, the length of the pin shaft 2016 is less than the height of the hinge connecting hole, the two ends of the inner wall of the hinge connecting hole are provided with a groove around the circumference, the hole elastic retainer 2014 is installed in the groove, and the two ends of the pin shaft 2016 are in contact with the hole elastic retainer 2014, so as to limit the pin shaft 2016 in the hinge connecting hole.

[0044] In order to improve the stability of the hinge in the shaft distance adjustable coupling 201, a shaft sleeve 2015 is arranged between the hinge connecting hole and the pin shaft 2016 in the shaft distance adjustable coupling 201.

[0045] Preferably, the shaft sleeve 2015 adopts a straight column type powder metallurgy copper sleeve. The following selection of the shaft sleeve 2015 has the following advantages: first, the corrosion resistance is strong. The chemical activity is not high, and it has excellent corrosion resistance and certain acid and alkali resistance, and can be used in sewage treatment working conditions with certain corrosion; second, the impact resistance is strong. Under the condition of movement, the compression resistance is strong, and it has certain impact resistance. The torque of the mud scraper is large, which can effectively alleviate the impact load during transmission and improve the service life of the coupling; third, the wear resistance is strong. After oil immersion, it can still run normally without lubricant and water lubricant, and still has the functions of sliding and self-lubrication.

[0046] As a further preferred embodiment of the shaft distance adjustable coupling 201, the first end plate 2011 and the second end plate 2013 are solid circular plates, and the middle plate 2012 is a triangular plate with three hollow holes uniformly distributed inside, and the center is in the form of a spoke, thereby reducing the weight of the middle plate 2012 itself.

[0047] As the preferred embodiment of the rotating support of the connecting shaft 204, the bearing seat 202 is a split structure, which is simple to install, high in structural strength and long in service life. Specifically, it is composed of two left and right symmetrical bearing parts, and the two bearing parts surround the mounting hole for mounting the sliding bearing 203. Preferably, the bearing part is L-shaped, which includes a connecting column 2021 and a connecting cross plate 2022 fixedly connected with the lower part of the connecting column 2021, and the abutting surface of the connecting cross plate 2022 of the two bearing parts is provided with a semicircular accommodating groove for placing the sliding bearing 203.

[0048] More specifically, the abutting surface of the two connecting cross plates 2022 extends to both sides to form a seat abutting plate 2023, and the seat abutting plate 2023 is provided with a fixing hole. Through the fixed connection of the corresponding hole positions of the seat abutting plates 2023 of the two bearing parts, the two bearing parts surround the bearing chamber.

[0049] Further, the top of each of the two connecting columns 2021 is provided with a pool body connecting plate 2024 for fixedly mounting the bearing seat 202. The pool body connecting plate 2024 is fixedly connected with the pool top by bolts to achieve the fixed mounting of the bearing seat 202. Further, the bearing seat 202 is fixed on the pool top by chemical bolts.

[0050] In some embodiments, the sliding bearing 203 is a split structure, which is convenient to install, and the material thereof can be copper-based alloy and nylon.

[0051] Further preferably for any of the above embodiments, the mud scraper further comprises a scraper arm 5, an arm support 4 and a mud bucket scraper 6 arranged in sequence from top to bottom on the main shaft 3, the scraper arm 5 and the arm support 4 are arranged in a cross shape, and a plurality of scraper plates 7 are distributed at intervals on the scraper arm 5.

[0052] When the mud scraper is applied to a sedimentation tank with a top bridge for civil work, the installation process includes the following steps:

[0053] (1) The driving mechanism 1 is installed on the top of the tank, the position of the driving mechanism 1 is adjusted so that the transmission shaft 8 driven by the driving mechanism 1 is approximately concentric with the reserved mounting hole of the top of the tank and passes through the reserved mounting hole of the top of the tank, and the driving mechanism 1 is adjusted to be horizontal, and then the transmission shaft 8 is adjusted to be vertically arranged.

[0054] (2) The center of the circular mud bucket at the bottom of the tank is found, the center of the circular mud bucket at the bottom of the tank is projected to the top of the tank by using a laser instrument, the support center of the bearing seat 202 is determined according to the projection position of the center of the top of the tank, the center axis of the bearing seat 202 is adjusted to be parallel to the axis of the transmission shaft 8, the sliding bearing 203 is installed in the bearing seat 202, and the connecting shaft 204 is installed in the sliding bearing 203.

[0055] (3) the first end plate 2011, the second end plate 2013 in the shaft distance adjustable coupling 201 are fixedly connected with the transmission shaft 8, the connecting shaft 204 respectively.

[0056] (4) the main shaft 3 is fixedly installed at the lower end of the connecting shaft 204.

[0057] After the shaft distance adjustable coupling 201 is installed in step 1), the distance between the first end plate 2011 and the second end plate 2013 can be adjusted according to the distance between the transmission shaft 8 and the connecting shaft 204, so the concentricity does not need to be too high in this step; during the installation of the mud scraper, the bearing seat 202 and the driving mechanism 1 are installed on the pool top, which is conducive to adjusting the parallelism between the axis of the connecting shaft 204 and the transmission shaft 8, achieving smooth transmission without jamming, and improving the service life of the whole machine.

[0058] The mud scraping process of the main shaft adjustable center transmission mud scraper is as follows: the driving mechanism 1 drives the transmission shaft 8 to rotate, the shaft distance adjustable coupling 201 transmits the rotation to the connecting shaft 204, the connecting shaft 204 drives the main shaft 3 to rotate, the scraper arm 5 rotates with the main shaft 3 to make a circular motion on the pool bottom, the scraper plate 7 scrapes the mud on the pool bottom to the central mud hopper on the pool bottom, and the mud hopper scraper plate 6 scrapes the mud on the inner side wall of the circular mud hopper on the pool bottom.

[0059] The above describes the utility model and its embodiments in a schematic manner, and the description is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above description, without departing from the creative purpose of the utility model, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the utility model.

Claims

1. A center drive mud scraper with adjustable spindle, comprising a spindle (3) and a drive mechanism (1) for driving the spindle (3) in rotation, characterized in that The adjustable connecting shaft assembly (2) comprises a shaft distance adjustable shaft coupling (201) which is in a Schmidt coupling type structure, the input end of which is fixedly connected with the output end of the driving mechanism (1), the output end of which is fixedly connected with the main shaft (3) through a connecting shaft (204), and the outer part of the connecting shaft (204) is provided with a sliding bearing (203) and a bearing seat (202).

2. The spindle adjustable center drive squeegee of claim 1, wherein, The bearing seat (202) is a split structure composed of two left and right symmetrical bearing parts, and the two bearing parts surround the mounting hole for mounting the sliding bearing (203).

3. The spindle adjustable center drive squeegee of claim 2, wherein, The bearing part is in an L-shaped structure, which comprises a connecting column (2021) and a connecting horizontal plate (2022) fixedly connected with the lower part of the connecting column (2021), and the abutting surfaces of the connecting horizontal plates (2022) of the two bearing parts are respectively provided with semicircular accommodating grooves for placing the sliding bearing (203).

4. The spindle adjustable center drive squeegee of claim 3, wherein, The abutting surfaces of the two connecting horizontal plates (2022) are extended to form seat abutting plates (2023), and the seat abutting plates (2023) are correspondingly provided with fixing holes.

5. The spindle adjustable center drive squeegee of claim 3, wherein, The top of the two connecting columns (2021) is provided with a pool connecting plate (2024) for fixing and mounting the bearing seat (202).

6. A center drive mud scraper with adjustable spindle according to any of claims 1-5, characterized in that, The sliding bearing (203) is in a split structure.

7. A center drive mud scraper with adjustable spindle according to any of claims 1-5, characterized in that, The shaft distance adjustable shaft coupling (201) comprises a first end plate (2011), a middle plate (2012) and a second end plate (2013) arranged in sequence from top to bottom, wherein the middle plate (2012) is hingedly connected with the first end plate (2011) and the second end plate (2013) through three connecting rods, the first end plate (2011) is connected with the output end of the driving mechanism (1) through a transmission shaft (8), and the second end plate (2013) is connected with the main shaft (3) through a connecting shaft (204).

8. The spindle adjustable center drive squeegee of claim 7, wherein, The first end plate (2011), the middle plate (2012) and the second end plate (2013) are correspondingly rotationally connected with the connecting rods through pins (2016), the two ends of the pin (2016) are limited by hole elastic retaining rings (2014), the pin (2016) is provided with a shaft sleeve (2015) between the pin (2016) and the hinged connection hole, and the shaft sleeve (2015) is in a straight column type powder metallurgy copper sleeve.

9. The spindle adjustable center drive squeegee of claim 7, wherein, The output end of the driving mechanism (1) drives the transmission shaft (8) to rotate through a gear transmission mechanism, a chain transmission mechanism or a belt transmission mechanism.

10. A center drive mud scraper with adjustable spindle according to any one of claims 1-5, characterized in that, The mud scraper further comprises a scraper arm (5), a supporting arm (4) and a mud bucket scraper (6) arranged in sequence from top to bottom on the main shaft (3), the scraper arm (5) and the supporting arm (4) are arranged in a cross shape, and a plurality of scrapers (7) are distributed at intervals on the scraper arm (5).

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