Waste liquid lifting pump for petrochemical intelligent sewage pool

Abstract

A waste liquid lift pump for a petrochemical intelligent sewage pool belongs to the technical field of industrial pumps. The lower part of the foundation plate is connected with a lifting pipe; the lower part of the lifting pipe is connected with a pump cover; the pump cover is detachably connected with a pump body; the lower part of the pump body is connected with a suction pipe; the lower end of the main shaft penetrates through the pump cover from the water pumping pipe, extends into the pump body and is connected with the impeller through a fastening nut, and the upper end of the main shaft is connected with a motor through a coupler. The water pumping device is characterized in that the upper side of the foundation plate is connected with a thin oil lubrication bearing body, the center of the thin oil lubrication bearing body is matched with the main shaft, and the upper side of the thin oil lubrication bearing body is connected with a motor support; the motor is arranged on the motor support, and a sliding bearing is arranged in an inner hole of the pump cover. According to the invention, the safe operation period and the impact load resistance can be improved, the operation is reliable, the service life is long and the operation efficiency is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial pumps, and in particular relates to a waste liquid lifting pump for a petrochemical smart sewage pool. Background Art

[0002] At present, the petrochemical industry at home and abroad has vigorously promoted the intelligent sewage treatment plant optimization system. The process parameters are collected and analyzed in real time to comprehensively improve the efficiency and quality of water management, reduce the operating costs of sewage treatment, and inject digital momentum into cost reduction and efficiency improvement.

[0003] For example, CNOOC and Shell Petrochemical Co., Ltd. was the first company in China to promote the intelligent wastewater treatment plant optimization system. In the high-density polyethylene device, the wastewater pump structure is VS4 (vertical submersible pump), the material is S-6, the medium contains floccules, the highest temperature is 60℃, the normal temperature is 45℃, and the imported pump brand is adopted. Its impeller, pump body and other flow-through parts are immersed in the transported medium, and the motor and other driving mechanisms are located above the pump foundation. Since the imported pump has two upper and lower rolling bearings, it is grease lubricated. Due to the liquid level, the lower rolling bearing is immersed in the medium for a long time, causing water to enter the bearing body, and it needs to be frequently disassembled, cleaned, replaced with grease and replaced with rolling bearings, which reduces the service life of the wastewater pump. Summary of the invention

[0004] The present invention is aimed at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides a waste liquid lifting pump for a petrochemical smart sewage pool; the present invention can improve the safe operation cycle and resistance to impact loads, and has reliable operation, long service life, and high operating efficiency.

[0005] To achieve the above purpose, the present invention adopts the following technical solution.

[0006] The present invention provides a waste liquid lifting pump for a petrochemical intelligent sewage pool, comprising a base plate, a water lifting pipe is connected under the base plate, a pump cover is connected under the water lifting pipe, the pump cover is detachably connected to a pump body, a suction pipe is connected under the pump body, a discharge pipe is connected to the side of the pump body, the discharge pipe is connected to the base plate, a main shaft is arranged through the base plate, the lower end of the main shaft passes through the pump cover from the water lifting pipe and extends into the pump body and is connected to an impeller through a fixing nut, and the upper end of the main shaft is connected to the pump body through a coupling It is connected to a motor, and is characterized in that a thin oil-lubricated bearing body is connected to the upper side of the base plate, the center of the thin oil-lubricated bearing body cooperates with the main shaft, the upper side of the thin oil-lubricated bearing body is connected to a motor bracket, the motor is arranged on the motor bracket, a sliding bearing is arranged in the inner hole of the pump cover, a rectangular groove is arranged on the upper end surface of the sliding bearing, a cylindrical pin is arranged in the rectangular groove, a pressure cover is connected above the pump cover, a concave hole is arranged on the lower end surface of the pressure cover, and the cylindrical pin is inserted into the concave hole of the pressure cover.

[0007] Furthermore, the thin oil lubricated bearing body includes a bearing housing, an angular contact ball bearing, a bearing sleeve, a bearing cover, a dust plate, an oil flinging plate and a bearing body end cover, the inner hole of the angular contact ball bearing is sleeved on the bearing sleeve, the outer ring of the angular contact ball bearing is connected to the inner hole of the bearing housing, the main shaft is matched and connected to the inner hole of the angular contact ball bearing, the bearing cover and the dust plate are arranged above the angular contact ball bearing, the bearing cover is connected to the bearing housing by fastening bolts, the dust plate is connected to the bearing cover, the oil flinging plate is arranged in the bearing housing and sleeved on the main shaft and rotates with the main shaft, and the bearing body end cover is arranged at the lower part of the oil flinging plate and is connected to the lower end of the bearing housing by fastening bolts.

[0008] Furthermore, the paired angular contact ball bearings are provided with flat washers, stop washers and round nuts, which are tightened with the round nuts through threads provided at corresponding positions of the main shaft, and the oil-slinging pan and the paired angular contact ball bearings are limited and fastened through the stop washers.

[0009] Furthermore, an oil collecting chamber with a large cavity structure is arranged in the bearing housing below the paired angular contact ball bearings, and an oil return hole is arranged inside the bearing housing to return the oil splashed from the upper paired angular contact bearings to the oil collecting chamber.

[0010] Furthermore, a vent plug component is provided on the dustproof disc.

[0011] Furthermore, the bearing housing is provided with an oil cup and an oil drain bolt for replenishing oil.

[0012] Furthermore, a shaft sleeve is connected on the main shaft at a position corresponding to the sliding bearing through a key.

[0013] Furthermore, an axial isolation sleeve seal is provided between the main shaft and the base plate.

[0014] Furthermore, the axial isolation sleeve seal includes an inner circle and an outer circle that can rotate relatively, the inner circle is connected to a corresponding position of the main shaft and rotates simultaneously with the main shaft, and the outer circle is fixed in an inner hole set in the base plate.

[0015] Furthermore, a filter component is connected below the suction pipe.

[0016] Beneficial effects of the present invention.

[0017] The present invention performs sliding bearing positioning support on the rotating shaft of the submerged part of the liquid, and the underwater sliding bearing is connected and fixed, so as to solve the rotation positioning of the long shaft at the underwater depth, improve the rigidity and rotation stability performance and the running load capacity of the rotating pump shaft, reduce the running cost, and extend the maintenance time; the transmission rolling bearing is lubricated with thin oil, and the thin oil lubricated bearing box is above the liquid level and isolated by the base plate, so as to avoid the disadvantages of the lower rolling bearing of the original technology being immersed in the medium for a long time, so that water enters the bearing body, and the need for frequent disassembly, cleaning, replacement of grease and replacement of rolling bearings, etc., thereby improving the service life of the wastewater pump; the axial direction adopts an axially arranged isolation sleeve type rotary seal to prevent particles in the conveying liquid from entering the bearing chamber and prevent liquid from entering the bearing chamber with the rotating shaft, so as to have good sealing effect and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Figure 1 It is a schematic diagram of the overall side sectional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the thin oil lubricated bearing body of the present invention.

[0021] Figure 3 It is a schematic diagram of the split body of the thin oil lubrication bearing body of the present invention.

[0022] Figure 4 It is a schematic diagram of the side section structure of the thin oil lubricated bearing body of the present invention.

[0023] Figure 5 The present invention Figure 1 A is the structural diagram of the sliding bearing.

[0024] Figure 6 It is a schematic structural diagram of the axial isolation sleeve seal of the present invention.

[0025] Markings in the figure: 1 is the base plate, 2 is the water lifting pipe, 3 is the pump cover, 4 is the pump body, 5 is the suction pipe, 6 is the discharge pipe, 7 is the main shaft, 8 is the impeller, 9 is the coupling, 10 is the motor, 11 is the thin oil lubrication bearing body, 12 is the motor bracket, 13 is the sliding bearing, 14 is the rectangular groove, 15 is the cylindrical pin, 16 is the pressure cover, 17 is the concave hole, 18 is the bearing box, 19 is the angular contact ball bearing, 20 is the bearing sleeve, 21 is the bearing pressure cover, 22 is the dust plate, 23 is the oil throwing plate, 24 is the bearing body end cover, 25 is the flat washer, 26 is the backlash washer, 27 is the round nut, 28 is the oil collecting chamber, 29 is the oil return hole, 30 is the air bleed plug component, 31 is the oil cup, 32 is the oil drain bolt, 33 is the key, 34 is the shaft sleeve, 35 is the axial isolation sleeve seal, and 36 is the filter component. DETAILED DESCRIPTION

[0026] As shown in the accompanying drawings, the present embodiment provides a waste liquid lifting pump for a petrochemical smart sewage pool, including a base plate 1, a water lifting pipe 2 is connected under the base plate 1, a pump cover 3 is connected under the water lifting pipe 2, the pump cover 3 is detachably connected to a pump body 4, a suction pipe 5 is connected under the pump body 4, a filter component 36 is connected under the suction pipe 5 for filtering, a discharge pipe 6 is connected to the side of the pump body 4, the discharge pipe 6 is connected to the base plate 1, a main shaft 7 is arranged through the base plate 1, the lower end of the main shaft 7 extends from the water lifting pipe 2 through the pump cover 3 into the pump body 4 and is connected to the impeller 8 through a fixing nut, and the upper end of the main shaft 7 is connected to a motor 10 through a coupling 9.

[0027] The main shaft 7 and the impeller 8 are driven to rotate by the motor 10. After the liquid obtains energy through the impeller 8, it enters the pump body 4 through the suction pipe 5 and is discharged from the outlet along the flow channel of the pump body 4, and flows through the discharge pipe 6 for output upward.

[0028] A thin oil-lubricated bearing body 11 is connected to the upper side of the base plate 1 , the center of the thin oil-lubricated bearing body 11 matches the main shaft 7 , and a motor bracket 12 is connected to the upper side of the thin oil-lubricated bearing body 11 , and the motor 10 is arranged on the motor bracket 12 .

[0029] The thin oil lubricated bearing body 11 includes a bearing housing 18 , a pair of angular contact ball bearings 19 , a bearing sleeve 20 , a bearing cover 21 , a dust plate 22 , an oil thrower plate 23 and a bearing body end cover 24 .

[0030] The inner hole of the paired angular contact ball bearing 19 is sleeved on the bearing sleeve 20, the outer ring of the paired angular contact ball bearing 19 is connected to the inner hole of the bearing box 18, the main shaft 7 is matched and connected to the inner hole of the paired angular contact ball bearing 19, the bearing cover 21 and the dust plate 22 are arranged above the paired angular contact ball bearing 19, the bearing cover 21 is connected to the bearing box 18 by fastening bolts, the dust plate 22 is connected to the bearing cover 21, the oil-slinging plate 23 is arranged in the bearing box 18 and sleeved on the main shaft 7 to rotate with the main shaft 7, and the bearing body end cover 24 is arranged at the lower part of the oil-slinging plate 23 and is connected to the lower end of the bearing box 18 by fastening bolts.

[0031] The paired angular contact ball bearings 19 are provided with flat washers 25, retaining washers 26 and round nuts 27, which are tightened with the round nuts 27 through the threads provided at the corresponding parts of the main shaft 7, and the oil-slinging pan 23 and the paired angular contact ball bearings 19 are limited and fastened by the retaining washers 26.

[0032] An oil collecting chamber 28 with a large cavity structure is arranged below the angular contact ball bearing 19 in the bearing housing 18 , and an oil return hole 29 is arranged inside the bearing housing 18 for returning the oil splashed from the upper angular contact bearing to the oil collecting chamber 28 .

[0033] The dust plate 22 is provided with a vent plug component 30, and the bearing housing 18 is provided with an oil cup 31 for replenishing oil and an oil drain bolt 32. As long as the oil cup 31 for replenishing oil has a minimum oil level display, the lubrication of the angular contact ball bearing 19 can be guaranteed.

[0034] By using thin oil to lubricate the angular contact ball bearing 19, the disadvantages of the original technology that the lower rolling bearing is immersed in the medium for a long time, causing water to enter the bearing body, and requiring frequent disassembly, cleaning, replacement of grease and replacement of rolling bearings are avoided, thereby improving the service life of the wastewater pump.

[0035] A sliding bearing 13 is arranged in the inner hole of the pump cover 3, and a shaft sleeve 34 is connected to the main shaft 7 at the corresponding sliding bearing 13 through a key 33 and rotates with the pump main shaft 7, a rectangular groove 14 is arranged on the upper end surface of the sliding bearing 13, and a cylindrical pin 15 is arranged in the rectangular groove 14, a pressure cover 16 is connected above the pump cover 3, and a concave hole 17 is arranged on the lower end surface of the pressure cover 16, and the cylindrical pin 15 is inserted into the concave hole 17 of the pressure cover 16.

[0036] By positioning and supporting the submerged rotating shaft with a sliding bearing 13, the submerged sliding bearing 13 is connected and fixed, thereby solving the problem of rotation positioning of the long shaft at the underwater depth, improving the rigidity and rotation stability of the rotating pump shaft and the operating load capacity, reducing operating costs and extending maintenance time.

[0037] An axial isolation sleeve seal 35 is arranged between the main shaft 7 and the base plate 1. The axial isolation sleeve seal 35 includes an inner circle and an outer circle which can rotate relatively. The inner circle is connected to the corresponding part of the main shaft 7 and rotates simultaneously with the main shaft 7. The outer circle is fixed in the inner hole arranged on the base plate 1 to prevent particles in the conveying liquid from entering the bearing chamber and to prevent the liquid from entering the bearing chamber along with the rotating shaft. The sealing effect is good and the service life is long.

[0038] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A waste liquid lifting pump for a petrochemical intelligent sewage pool, comprising a base plate (1), a water lifting pipe (2) being connected below the base plate (1), a pump cover (3) being connected below the water lifting pipe (2), the pump cover (3) being detachably connected to a pump body (4), a suction pipe (5) being connected below the pump body (4), a discharge pipe (6) being connected to the side of the pump body (4), the discharge pipe (6) being connected to the base plate (1), a main shaft (7) being arranged through the base plate (1), the lower end of the main shaft (7) extending from the water lifting pipe (2) through the pump cover (3) into the pump body (4) and being connected to an impeller (8) through a fixing nut, the upper end of the main shaft (7) being connected to a motor (10) through a coupling (9), characterized in that: A thin oil lubricated bearing body (11) is connected to the upper side of the base plate (1), the center of the thin oil lubricated bearing body (11) is matched with the main shaft (7), a motor bracket (12) is connected to the upper side of the thin oil lubricated bearing body (11), the motor (10) is arranged on the motor bracket (12), a sliding bearing (13) is arranged in the inner hole of the pump cover (3), a rectangular groove (14) is arranged on the upper end surface of the sliding bearing (13), a cylindrical pin (15) is arranged in the rectangular groove (14), a pressure cover (16) is connected to the upper side of the pump cover (3), a concave hole (17) is arranged on the lower end surface of the pressure cover (16), and the cylindrical pin (15) is inserted into the concave hole (17) of the pressure cover (16).

2. A waste liquid lifting pump for a petrochemical intelligent sewage pool according to claim 1, characterized in that: The thin oil lubricated bearing body (11) comprises a bearing housing (18), a paired angular contact ball bearing (19), a bearing sleeve (20), a bearing cover (21), a dust plate (22), an oil thrower plate (23) and a bearing body end cover (24); the inner hole of the paired angular contact ball bearing (19) is sleeved on the bearing sleeve (20); the outer ring of the paired angular contact ball bearing (19) is connected to the inner hole of the bearing housing (18); the main shaft (7) is matched and connected to the inner hole of the paired angular contact ball bearing (19); the bearing cover The bearing cover (21) and the dust plate (22) are arranged above the paired angular contact ball bearings (19); the bearing cover (21) is connected to the bearing housing (18) by fastening bolts; the dust plate (22) is connected to the bearing cover (21); the oil-slinging plate (23) is arranged in the bearing housing (18) and is sleeved on the main shaft (7) to rotate with the main shaft (7); the bearing body end cover (24) is arranged at the lower part of the oil-slinging plate (23) and is connected to the lower end of the bearing housing (18) by fastening bolts.

3. A waste liquid lifting pump for a petrochemical intelligent sewage pool according to claim 2, characterized in that: The paired angular contact ball bearings (19) are provided with flat washers (25), stop washers (26) and round nuts (27), which are screwed together with the round nuts (27) through threads provided at corresponding positions of the main shaft (7), and the stop washers (26) are used to limit and fasten the oil-slinging pan (23) and the paired angular contact ball bearings (19).

4. A waste liquid lifting pump for a petrochemical intelligent sewage pool according to claim 2, characterized in that: An oil collecting chamber (28) with a large cavity structure is arranged in the bearing housing (18) below the paired angular contact ball bearings (19), and an oil return hole (29) is arranged inside the bearing housing (18) for returning oil splashed from the paired angular contact bearings to the oil collecting chamber (28).

5. The waste liquid lifting pump for petrochemical intelligent sewage pool according to claim 2 is characterized in that: The dustproof disc (22) is provided with an air release plug component (30).

6. A waste liquid lifting pump for a petrochemical intelligent sewage pool according to claim 2, characterized in that: The bearing housing (18) is provided with an oil cup (31) for replenishing oil and an oil drain bolt (32).

7. The waste liquid lifting pump for petrochemical intelligent sewage pool according to claim 1, characterized in that: A shaft sleeve (34) is connected to the main shaft (7) at a position corresponding to the sliding bearing (13) via a key (33).

8. The waste liquid lifting pump for petrochemical intelligent sewage pool according to claim 1, characterized in that: An axial isolation sleeve seal (35) is provided between the main shaft (7) and the base plate (1).

9. A waste liquid lifting pump for a petrochemical intelligent sewage pool according to claim 8, characterized in that: The axial isolation sleeve seal (35) comprises an inner circle and an outer circle which are rotatable relative to each other, the inner circle being connected to a corresponding portion of the main shaft (7) and rotating simultaneously with the main shaft (7), and the outer circle being fixed in an inner hole provided on the base plate (1).

10. The waste liquid lifting pump for petrochemical intelligent sewage pool according to claim 1, characterized in that: A filter component (36) is connected below the suction pipe (5).

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