Double-blade type anti-blocking submersible sewage pump

Abstract

The invention relates to the technical field of sewage pumps, and discloses a double-blade type anti-blocking submersible sewage pump which comprises a pump shell, a pump body connected to the pump shell and a main motor, the pump shell comprises a motor shell and an oil chamber shell, the main motor is arranged in the motor shell, an oil storage chamber used for storing lubricating oil is formed in the oil chamber shell, and the main motor is arranged in the oil chamber shell. An impeller is arranged in the pump body, a main shaft is connected between the impeller and an output shaft of the main motor, the main motor can drive the impeller to rotate so as to control sewage suction or discharge, the oil chamber shell comprises an annular wall extending in the circumferential direction, and the annular wall is located on the inner side of the motor shell. The annular wall of the oil chamber shell is arranged on the inner side of the motor shell, so that the overall size and area of the oil chamber shell are reduced, the material consumption of the oil chamber shell is reduced, and the effect of reducing the cost of raw materials is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage pumps, and in particular to a double-blade anti-clogging submersible sewage pump. Background Art

[0002] A sewage pump is a centrifugal pump specially used to transport sewage containing solid particles, fibers or other impurities. It is mainly used in scenarios where efficient sewage discharge is required.

[0003] In related technologies, such as Figure 1 The figure discloses a sewage pump comprising a pump housing 1, a pump body 3 connected to the pump housing 1, and a main motor 5. The pump housing 1 includes a motor housing 14 and an oil chamber housing 13 disposed between the pump body 3 and the motor housing 14. The main motor 5 is disposed in the motor housing 14, and an oil reservoir 4 for storing lubricating oil is formed within the oil chamber housing 13. An impeller 33 is disposed in the pump body 3. A main shaft 331 is connected between the impeller 33 and the output shaft of the main motor 5, enabling the main motor 5 to drive the impeller 33 to rotate and control the suction or discharge of sewage.

[0004] However, in order to ensure the supporting effect of the oil chamber shell 13 on the motor shell 14, the outer diameter of the oil chamber shell 13 of the above-mentioned sewage pump is often the same as or slightly smaller than the outer diameter of the motor shell 14, which makes the oil chamber shell 13 use more materials and leads to higher production costs of the sewage pump, so it needs to be improved. Summary of the Invention

[0005] In order to reduce the production cost of sewage pumps, the present application provides a double-blade anti-clogging submersible sewage pump.

[0006] The present application provides a double-blade anti-clogging submersible sewage pump adopts the following technical solution: A double-blade anti-clogging submersible sewage pump includes a pump casing, a pump body connected to the pump casing, and a main motor. The pump casing includes a motor casing and an oil chamber casing, wherein the main motor is arranged in the motor casing, and an oil storage chamber for storing lubricating oil is formed in the oil chamber casing. An impeller is provided in the pump body, and a main shaft is connected between the impeller and the output shaft of the main motor. The main motor can drive the impeller to rotate to control the suction or discharge of sewage. The oil chamber casing includes an annular wall extending circumferentially, and the annular wall is located on the inner side of the motor casing.

[0007] By adopting the above-mentioned technical solution, when the annular wall of the oil chamber housing is disposed inside the motor housing in the present application, the outer diameter of the annular wall of the oil chamber housing is smaller than the outer diameter of the motor housing, compared to the method of disposing the entire oil chamber housing between the pump body and the motor housing. When the pump body and the motor housing are the same size, the overall volume and area of the oil chamber housing are reduced, thereby reducing the amount of raw materials used for the pump housing and lowering the production cost of the sewage pump. At the same time, the reduced volume of the oil chamber housing also reduces the amount of lubricating oil that the oil chamber housing can accommodate. This reduces the oil consumption of the sewage pump without affecting the lubrication effect, thereby further saving costs.

[0008] Optionally, the oil chamber housing further includes an end wall fixedly connected to the annular wall, and the end wall is arranged between the pump body and the motor housing.

[0009] By adopting the above technical solution, the end wall of the oil chamber housing is connected between the pump body and the motor housing, so that the weight of the main motor and the motor housing is pressed on the end wall, and then on the pump body, so that the annular wall of the oil chamber housing no longer bears the weight of the main motor and the motor housing, which is beneficial to protecting the annular wall of the oil chamber housing from damage, and the annular wall of the oil chamber housing can be made of a material with lower structural strength, thereby reducing material selection requirements, improving production efficiency and reducing production costs.

[0010] Optionally, the pump body is provided with a water inlet for sewage to flow in, and a filter is provided at the water inlet.

[0011] By adopting the above technical solution, when the sewage pump is used to transport sewage, the filter net can block impurities outside the water inlet, making it difficult for impurities to enter the water inlet and block the impeller, causing the sewage pump to malfunction, thereby extending the service life of the sewage pump.

[0012] Optionally, an extension ring is provided on the side of the pump body away from the oil chamber shell, the extension ring is connected to the water inlet, the filter is arranged on the side of the extension ring away from the pump body, a cutting mechanism is provided in the extension ring, and a rotating mechanism is connected to the cutting mechanism, and the rotating mechanism can drive the cutting mechanism to rotate.

[0013] By adopting the above technical solution, when impurities pass through the filter and enter the water inlet, the rotating mechanism drives the cutting mechanism to rotate, and then the cutting mechanism can chop the impurities into pieces. After the impurities are chopped, they are mixed in the sewage and are not easy to clog the impeller when flowing into the pump body, which facilitates the impeller to transport sewage and improves the sewage transportation efficiency.

[0014] Optionally, the cutting mechanism includes a rotating shaft, main blades evenly arranged along the circumference of the rotating shaft, and auxiliary blades evenly arranged along the circumference of the rotating shaft, the length of the auxiliary blades is smaller than the main blades, and the auxiliary blades are arranged on the side of the main blades close to the impeller.

[0015] By adopting the above technical solution, when impurities enter the water inlet, large impurities will be chopped up by the main blade, while small impurities will be chopped up by the auxiliary blade, further refining the impurities, making it less likely for the impeller to be blocked by the impeller, which is conducive to ensuring the normal operation of the impeller and further improving the efficiency of the sewage pump in transporting sewage. In addition, when the sewage pump is used to transport sewage with a small amount of impurities, there is no need to use the cutting mechanism. The rotating mechanism can be turned off, thereby independently controlling the cutting mechanism to stop rotating. As a result, the cutting mechanism will not rotate with the main shaft of the impeller, so that the load on the main motor is small when the cutting mechanism is not used, which is conducive to saving energy consumption when using the sewage pump.

[0016] Optionally, a connecting rod is connected between the main blade and the rotating shaft, and between the auxiliary blade and the rotating shaft. The rotating shaft is provided with a mounting screw hole for the connecting rod to extend into, and the connecting rod is provided with a mounting thread matching the thread of the mounting screw hole. The connecting rod is threaded with a mounting nut that can tighten the connecting rod onto the rotating shaft.

[0017] By adopting the above technical solution, when the main blade or the auxiliary blade is blocked by impurities and cannot rotate, the mounting nut on the connecting rod can be loosened first, and then the connecting rod can be rotated relative to the mounting screw hole to change the angle of the main blade or the auxiliary blade, thereby removing the impurities stuck in the main blade or the auxiliary blade, and then the connecting rod can be screwed into the mounting screw hole and the mounting nut can be tightened. The mounting nut can further lock the connecting rod on the rotating shaft, making it less likely for the main blade and the auxiliary blade to deflect during the cutting process. Compared with directly rotating the main blade or the auxiliary blade tightened in the mounting screw hole, loosening the mounting nut first will cause the connecting rod to loosen. At this time, rotating the loosened connecting rod is less likely to cause damage to the hands, is easy to operate, and facilitates maintenance of the main blade or the auxiliary blade. When the main blade or the auxiliary blade is damaged, the damaged main blade or the auxiliary blade can also be replaced separately without replacing the rotating shaft, saving costs.

[0018] Optionally, a non-slip pad is provided on one side of the mounting nut close to the mounting screw hole, and the non-slip pad is sleeved on the connecting rod.

[0019] By adopting the above technical solution, when the main blade and the auxiliary blade are connected to the rotating shaft, the anti-slip pad can increase the friction between the mounting nut and the rotating shaft, so that when the main blade and the auxiliary blade are cutting, the mounting nut is more stable relative to the rotating shaft, and the mounting nut has a good fixing effect on the connecting rod, and the connecting rod is not easy to rotate relative to the mounting screw hole, thereby making the connection between the main blade and the auxiliary blade and the rotating shaft more stable, and the cutting mechanism has a good cutting effect on impurities.

[0020] Optionally, the rotating mechanism is arranged in the extension ring, and the rotating mechanism includes a rotating motor, a transmission gear connected to the output shaft of the rotating motor, and a transmission chain sleeved on the transmission gear. The rotating shaft is provided with gear teeth engaged with the transmission chain, and the transmission chain is sleeved on the gear teeth. A protective cover is provided on the extension ring, and the transmission chain and gear teeth are arranged on the inner side of the protective cover.

[0021] By adopting the above technical solution, when the rotary motor rotates, the output shaft of the rotary motor drives the transmission gear, which in turn drives the transmission chain, which in turn drives the rotary shaft, causing the primary and secondary blades to rotate and cut impurities. This arrangement simplifies the structure of the rotary mechanism and saves costs. The protective cover protects the transmission chain and gear teeth, reducing the risk of silt or impurities clogging the transmission chain and gear teeth. When the cutting mechanism is not in use, the rotary motor can be turned off, causing the cutting mechanism to stop rotating, which helps reduce energy consumption when using the sewage pump.

[0022] Optionally, annular blades are evenly arranged on the circumference of the inner wall of the extension ring, and the annular blades are staggered with the main blades and the auxiliary blades.

[0023] By adopting the above technical solution, when impurities enter the extension ring, they will not only be cut by the main blade and the auxiliary blade, but also by the ring blade, so that the impurities can fully contact the blades. Even if the impurities are pushed to the inner wall of the extension ring by the main blade and the auxiliary blade, they will be chopped under the action of the ring blade, thereby improving the efficiency of cutting impurities.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By placing the oil chamber shell inside the motor shell, the storage space of the oil storage chamber is reduced, thereby reducing oil consumption and saving costs. In addition, the annular wall of the oil chamber shell no longer bears weight, so the annular wall can be made of a material with lower structural strength, simplifying the production process and saving costs. 2. By setting a rotating mechanism and a cutting mechanism at the water inlet, impurities are crushed, making it difficult for the impeller to be blocked by impurities, thereby improving the sewage transportation efficiency of the sewage pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the cross-sectional structure of a sewage pump in the related art.

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of Example 1 of the present application.

[0027] Figure 3 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0028] Figure 4 It is a schematic diagram of the partial cross-sectional structure of Example 2 of the present application.

[0029] Figure 5 It is a partial cross-sectional schematic diagram after the protective cover is hidden in Example 2 of the present application.

[0030] Figure 6 It is a partial cross-sectional schematic diagram used to display the anti-slip mat in Example 2 of the present application.

[0031] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0032] Description of reference numerals: 1. Pump casing; 13. Oil chamber casing; 131. Ring wall; 132. End wall; 14. Motor casing; 3. Pump body; 31. Water inlet; 311. Extension ring; 312. Filter screen; 313. First half ring; 314. Second half ring; 32. Water outlet; 33. Impeller; 331. Main shaft; 4. Oil storage chamber; 5. Main motor; 6. Cutting mechanism; 61. Rotating shaft; 611. Mounting screw hole; 612. Boss; 62. Main blade; 63. Auxiliary blade; 64. Gear teeth; 65. Ring blade; 7. Rotating mechanism; 71. Rotating motor; 72. Transmission gear; 73. Transmission chain; 74. Protective cover; 9. Connecting rod; 91. Mounting nut; 92. Anti-slip pad. DETAILED DESCRIPTION

[0033] The following is combined with Figure 2-6 This application is described in further detail.

[0034] The embodiment of the present application discloses a double-blade anti-clogging submersible sewage pump.

[0035] Example 1 Reference Figure 2 A double-blade anti-clogging submersible sewage pump includes a pump casing 1, a pump body 3 connected to the pump casing 1, and a main motor 5. The pump casing 1 includes a motor casing 14 and an oil chamber casing 13, wherein the main motor 5 is arranged in the motor casing 14, and an oil storage chamber 4 for storing lubricating oil is formed in the oil chamber casing 13, wherein the pump body 3 is provided with a water inlet 31 for sewage to flow in and a water outlet 32 for sewage to flow out. The oil chamber casing 13 includes a circumferentially extending annular wall 131 and an end wall 132 fixedly connected to the annular wall 131. The annular wall 131 is located on the inner side of the motor casing 14, and the end wall 132 is arranged between the pump body 3 and the motor casing 14. Specifically, the end wall 132 can be connected to the pump body 3 and the motor casing 14 by bolts.

[0036] Reference Figure 2The pump body 3 is provided with an impeller 33 for sucking in and discharging sewage. A main shaft 331 is connected between the impeller 33 and the output shaft of the main motor 5. The main motor 5 is capable of driving the impeller 33 to rotate. Lubricating oil is stored in the oil reservoir 4. The stator of the main motor 5 is generally wound with a certain number of turns of copper coil. In this embodiment, the stator of the main motor 5 has a shorter diameter and a longer length than the stator of the sewage pump in the related art. This reduces the length of the copper coil required when the same number of turns are wound, thereby saving costs.

[0037] The implementation principle of the double-blade anti-clogging submersible sewage pump in the embodiment of the present application is as follows: by arranging the annular wall 131 on the inner side of the motor housing 14, the outer diameter of the oil chamber housing 13 is reduced, thereby reducing the overall volume and area of the oil chamber housing 13. Therefore, the material used for the oil chamber housing 13 is reduced, thereby reducing the production cost of the sewage pump. The storage space of the oil chamber housing 13 is also reduced, thereby reducing the amount of oil used and saving costs. In addition, the end wall 132 of the oil chamber housing 13 is connected between the motor housing 14 and the pump body 3, so that the annular wall 131 no longer bears the weight of the main motor 5 and the motor housing 14, which is conducive to protecting the annular wall 131 from damage. Therefore, the annular wall 131 can be made of a material with lower structural strength, which reduces the material selection requirements and saves costs.

[0038] Example 2 Reference Figure 2 、 Figure 3 and Figure 4 The difference between this embodiment and embodiment 1 is that an extension ring 311 is provided on the side of the pump body 3 away from the oil chamber shell 13, and the extension ring 311 is connected to the water inlet 31. The extension ring 311 includes a first half ring 313 and a second half ring 314. The first half ring 313 is fixedly connected to the pump body 3, and the second half ring 314 is detachably connected to the first half ring 313. The above-mentioned detachable connection method can be a bolt connection or any other method that can achieve connection and disassembly of the second half ring 314 and the first half ring 313.

[0039] Reference Figure 4 A filter screen 312 is provided on the side of the extension ring 311 away from the pump body 3. The filter screen 312 is detachably attached to the extension ring 311. The detachable connection method may be a bolt connection or any other connection method that can achieve a detachable connection between the filter screen 312 and the extension ring 311. Furthermore, a cutting mechanism 6 is provided in the extension ring 311. The cutting mechanism 6 is connected to a rotating mechanism 7. The rotating mechanism 7 is provided on the extension ring 311 and can drive the cutting mechanism 6 to rotate.

[0040] Reference Figure 5The rotating mechanism 7 includes a rotating motor 71, a transmission gear 72 connected to the output shaft of the rotating motor 71, and a transmission chain 73 mounted on the transmission gear 72. In this embodiment, the rotating motor 71 is isolated from the water inlet 31 by a mechanical seal to prevent sewage from soaking the rotating motor 71. Mechanical seals are known in the art and will not be described in detail here.

[0041] Reference Figure 4 The cutting mechanism 6 includes a rotating shaft 61, primary blades 62 evenly arranged along the circumference of the rotating shaft 61, and secondary blades 63 evenly arranged along the circumference of the rotating shaft 61. The secondary blades 63 are shorter than the primary blades 62 and are located on the side of the primary blades 62 closer to the impeller 33. Both the primary blades 62 and the secondary blades 63 are offset at a certain angle from the direction in which the sewage enters the pump body, thereby facilitating the cutting of impurities.

[0042] Reference Figure 4 In order to prevent impurities from being pushed to the inner wall of the extension ring 311 by the main blade 62 and the auxiliary blade 63 and not being cut, ring blades 65 are evenly arranged on the circumference of the inner wall of the extension ring 311, and the ring blades 65 are staggered with the main blade 62 and the auxiliary blade 63, thereby improving the efficiency of cutting impurities.

[0043] Reference Figure 4 and Figure 5 The rotating shaft 61 is provided with gear teeth 64 that mesh with the transmission chain 73. The transmission chain 73 is sleeved on the gear teeth 64 and can mesh with the gear teeth 64 for transmission. A protective cover 74 is fixed to the inner wall of the extension ring 311. The transmission chain 73 and the gear teeth 64 are arranged inside the protective cover 74. The protective cover 74 can prevent silt or impurities from entering the gap between the transmission chain 73 and the gear teeth 64, reducing the risk of clogging the transmission chain 73 and the gear teeth 64. When the rotating motor 71 rotates, it drives the transmission chain 73 to rotate, thereby driving the rotating shaft 61 to rotate. As a result, the cutting mechanism 6 can cut up impurities entering the water inlet 31, making it less likely for impurities to clog the impeller 33, thereby improving the conveying efficiency of the sewage pump.

[0044] Reference Figure 6 A connecting rod 9 is connected between the main blade 62 and the rotating shaft 61, and between the auxiliary blade 63 and the rotating shaft 61, and a mounting screw hole 611 is opened on the rotating shaft 61 for the connecting rod 9 to extend into. At the same time, the connecting rod 9 is provided with a mounting thread that matches the thread of the mounting screw hole 611, and the connecting rod 9 is threadedly connected to a mounting nut 91 that can be tightened on the rotating shaft 61. The mounting nut 91 can further fix the connecting rod 9 on the rotating shaft 61, so that the main blade 62 and the auxiliary blade 63 are not easy to rotate relative to the rotating shaft 61 during the cutting process.

[0045] Reference Figure 6 and Figure 7The rotating shaft 61 is provided with bosses 612 whose number is equal to and corresponds to the connecting rod 9. The mounting screw holes 611 are opened on the bosses 612 and the rotating shaft 61. The contact surface between the bosses 612 and the mounting nut 91 is flat, so that the contact area between the mounting nut 91 and the bosses 612 is large, so that the connection stability between the mounting nut 91 and the bosses 612 is high, and the mounting nut 91 has a good fixing effect on the connecting rod 9.

[0046] Reference Figure 6 and Figure 7 A non-slip pad 92 is provided on one side of the mounting nut 91 near the mounting screw hole 611. The non-slip pad 92 is sleeved on the connecting rod 9 and located between the mounting nut 91 and the boss 612. When the mounting nut 91 needs to be rotated, the filter 312 can be removed from the extension ring 311 first, and then the second half ring 314 can be separated from the first half ring 313. Then, a tool that can be used to tighten the mounting nut 91, such as a wrench, can be brought close to the mounting nut 91 and rotated to rotate the mounting nut 91. At the same time, the rotating shaft 61 can be rotated to operate each mounting nut 91, which is easy to operate.

[0047] The dual-blade, anti-clogging submersible sewage pump of the present embodiment is implemented as follows: when the sewage pump is used for sewage transportation, after the sewage enters the water inlet 31, the main blade 62 and the auxiliary blade 63 rotate along the rotating shaft 61 under the action of the rotating motor 71, thereby chopping impurities in the sewage, reducing the volume of the impurities, making it less likely to clog the water inlet 31 or the impeller 33, reducing the time wasted on repairs caused by blockages, and thereby improving the sewage pump's sewage transportation efficiency. When the amount of impurities in the sewage is low, there is no need to turn on the rotating motor 71, which helps reduce the energy consumption of the sewage pump.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A double-blade anti-clogging submersible sewage pump, comprising a pump housing (1), a pump body (3) connected to the pump housing (1), and a main motor (5), wherein the pump housing (1) comprises a motor housing (14) and an oil chamber housing (13), wherein the main motor (5) is arranged in the motor housing (14), and an oil storage chamber (4) for storing lubricating oil is formed in the oil chamber housing (13), an impeller (33) is arranged in the pump body (3), a main shaft (331) is connected between the impeller (33) and the output shaft of the main motor (5), and the main motor (5) can drive the impeller (33) to rotate to control the suction or discharge of sewage, characterized in that: The oil chamber housing (13) comprises a circumferentially extending annular wall (131), and the annular wall (131) is located inside the motor housing (14).

2. A double-blade anti-clogging submersible sewage pump according to claim 1, characterized in that: The oil chamber housing (13) further comprises an end wall (132) fixedly connected to the annular wall (131), and the end wall (132) is arranged between the pump body (3) and the motor housing (14).

3. A double-blade anti-clogging submersible sewage pump according to claim 1, characterized in that: The pump body (3) is provided with a water inlet (31) for sewage to flow in, and a filter screen (312) is provided at the water inlet (31).

4. A double-blade anti-clogging submersible sewage pump according to claim 3, characterized in that: An extension ring (311) is provided on a side of the pump body (3) away from the oil chamber housing (13), the extension ring (311) being in communication with the water inlet (31), the filter screen (312) being arranged on a side of the extension ring (311) away from the pump body (3), a cutting mechanism (6) being provided in the extension ring (311), a rotating mechanism (7) being connected to the cutting mechanism (6), and the rotating mechanism (7) being capable of driving the cutting mechanism (6) to rotate.

5. A double-blade anti-clogging submersible sewage pump according to claim 4, characterized in that: The cutting mechanism (6) comprises a rotating shaft (61), a main blade (62) uniformly arranged along the circumference of the rotating shaft (61), and an auxiliary blade (63) uniformly arranged along the circumference of the rotating shaft (61), wherein the length of the auxiliary blade (63) is smaller than that of the main blade (62), and the auxiliary blade (63) is arranged on a side of the main blade (62) close to the impeller (33).

6. A double-blade anti-clogging submersible sewage pump according to claim 5, characterized in that: A connecting rod (9) is connected between the main blade (62) and the rotating shaft (61), and between the auxiliary blade (63) and the rotating shaft (61). The rotating shaft (61) is provided with a mounting screw hole (611) for the connecting rod (9) to extend therethrough. The connecting rod (9) is provided with a mounting thread that matches the thread of the mounting screw hole (611). The connecting rod (9) is threadedly connected with a mounting nut (91) that can tighten the connecting rod (9) onto the rotating shaft (61).

7. A double-blade anti-clogging submersible sewage pump according to claim 6, characterized in that: A non-slip pad (92) is provided on one side of the mounting nut (91) close to the mounting screw hole (611), and the non-slip pad (92) is sleeved on the connecting rod (9).

8. The double-blade anti-clogging submersible sewage pump according to claim 5, characterized in that: The rotating mechanism (7) is arranged in the extension ring (311), and comprises a rotating motor (71), a transmission gear (72) connected to the output shaft of the rotating motor (71), and a transmission chain (73) sleeved on the transmission gear (72); the rotating shaft (61) is provided with gear teeth (64) meshing with the transmission chain (73); the transmission chain (73) is sleeved on the gear teeth (64); the extension ring (311) is provided with a protective cover (74); the transmission chain (73) and the gear teeth (64) are arranged on the inner side of the protective cover (74).

9. The double-blade anti-clogging submersible sewage pump according to claim 5, characterized in that: Ring blades (65) are evenly arranged on the circumference of the inner wall of the extension ring (311), and the ring blades (65) are staggered with the main blades (62) and the auxiliary blades (63).

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