Self-suction type double-suction pump

Abstract

The utility model relates to the field of double-suction pumps, and discloses a self-suction type double-suction pump which comprises a pump shell, the left side and the right side of the pump shell are fixedly connected with water distribution pipes, the two water distribution pipes are communicated with openings in the left side and the right side of the pump shell respectively, the top ends of the water distribution pipes obliquely extend forwards, and the bottom ends of the water distribution pipes are fixedly connected with a base. An impeller shaft is arranged in the pump shell, the left end and the right end of the impeller shaft penetrate out of the pump shell and the outer walls of the water distribution pipes, bearing seats are arranged on the outer walls of the left end and the right end of the impeller shaft, and bearings fixedly sleeve the outer walls of the two ends of the impeller shaft. The impeller shaft is rotationally connected with a bearing seat through a bearing, and the bearing seat is fixedly connected with the outer wall of the water distribution pipe. The two impeller assemblies which are in mirror symmetry and fixedly connected with the opposite side walls are driven by the impeller shaft to rotate synchronously, water flow can be pressurized more effectively, the lift and flow of the pump are improved, and the performance of the pump is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a double-suction pump field, specifically to a self-priming double-suction pump. BACKGROUND

[0002] In the field of fluid transportation, pumps are widely used in agricultural irrigation, urban water supply and drainage, petroleum and chemical industry and other industries as an important mechanical equipment. With the continuous development of technology, the performance requirements of pumps are becoming higher and higher, especially in self-priming capacity, flow, head and running stability.

[0003] Double-suction pumps usually have two water inlets and can suck water from two directions at the same time. This design effectively reduces the axial force and improves the running stability of the pump. However, the current double-suction pump still has deficiencies in self-priming capacity, especially in the need for external water diversion before starting and the long self-priming time, which makes it difficult to meet the use requirements in emergency situations. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the above-mentioned deficiencies, the utility model provides a self-priming double-suction pump.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A self-priming double-suction pump, comprising a pump shell, the left and right sides and the top of the pump shell are open, the left and right sides of the pump shell are fixedly connected with water distribution pipes, the two water distribution pipes are respectively communicated with the left and right side openings of the pump shell, the top end of the water distribution pipe is inclined forward, the bottom end of the water distribution pipe is fixedly connected with a base, the top ends of the two water distribution pipes are fixedly communicated with a flow divider connector, the front end of the flow divider connector is fixedly communicated with a water inlet pipe, the front side wall of the water distribution pipe is fixedly connected with a support leg in the middle, the bottom end of the support leg is inclined forward, the pump shell has an impeller shaft, the left and right ends of the impeller shaft penetrate out of the outer wall of the pump shell and the water distribution pipe, the left and right ends of the impeller shaft are provided with bearing seats on the outer wall, the impeller shaft is fixedly sleeved with bearings on the outer wall of the two ends, the impeller shaft is rotatably connected with the bearing seats through the bearings, the bearing seats are fixedly connected with the outer wall of the water distribution pipe, the inner side of the bearing seat is provided with a water seal inner sleeve, the water seal inner sleeve is rotatably connected with the impeller shaft, the opposite sides of the two bearing seats are fixedly connected with a gland, the left end of the impeller shaft penetrates out of the outer side of the gland, the pump shell has two impeller assemblies, the impeller assemblies are fixedly sleeved on the impeller shaft, the impeller assemblies are slidingly matched with the inner wall of the pump shell, the two impeller assemblies are mirror-symmetrically arranged, the opposite side walls of the two impeller assemblies are fixedly connected, the top opening of the pump shell is fixedly sleeved with a flange one on the outer wall, the pump shell has a water outlet pipe on the top, the bottom outer wall of the water outlet pipe is fixedly sleeved with a flange two, the water outlet pipe is fixedly communicated with the pump shell through the flange two and the flange one, and a check valve is installed between the flange one and the flange two.

[0007] The check valve comprises a fixed ring located between the inner sides of the flange one and the flange two, the top of the fixed ring is provided with a valve core matched with the inner side of the fixed ring, the outer side of the top of the fixed ring is fixedly connected with a fixed plate, the outer wall of the fixed plate is fixedly connected with a limiting rod, the limiting rod penetrates through the fixed plate, the outer walls of the two ends of the limiting rod are slidably sleeved with torsion springs, and the two ends of the torsion springs are fixedly connected with the outer walls of the fixed plate and the valve core respectively.

[0008] The utility model discloses the beneficial effects of:

[0009] The utility model discloses the design that the top of water distribution pipe inclines to extend forward, can guide the water flow more smoothly into the pump, reduced the resistance when the water flow enters the pump shell, improved the water inlet efficiency, thereby help to promote the overall working efficiency of pump.

[0010] Two impeller assemblies that are mirror images and are fixedly connected to opposite side walls synchronously rotate under the drive of the impeller shaft, can more effectively pressurize the water flow, improve the lift and flow of the pump, and enhance the performance of the pump.

[0011] The setting of the check valve effectively prevents the water flow from flowing back into the pump shell when the pump stops working or the water flow flows backward, avoids problems such as impeller reversal and water pump damage that may be caused by backward flow of the water flow, and improves the working reliability and safety of the pump. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of the utility model;

[0013] Figure 2 is Figure 1 a left view of the utility model;

[0014] Figure 3 is Figure 2 a sectional view of the utility model at A-A;

[0015] Figure 4 is Figure 3 an enlarged view of B in the utility model.

[0016] In all the drawings, the reference signs are specifically as follows: 1, pump shell; 2, water distribution pipe; 3, water distributor connector; 4, water inlet pipe; 5, base; 6, support leg; 7, bearing seat; 8, impeller shaft; 9, bearing; 10, water seal inner sleeve; 11, gland; 12, impeller assembly; 13, flange one; 14, water outlet pipe; 15, flange two; 16, fixed ring; 17, fixed plate; 18, limiting rod; 19, torsion spring; 20, valve core. DETAILED DESCRIPTION

[0017] As Figures 1-4As shown: a self-priming double suction pump, including the pump shell 1, the left and right sides and the top of the pump shell 1 are open, the left and right sides of the pump shell 1 are fixedly connected with the water distribution pipe 2, the two water distribution pipes 2 are respectively communicated with the left and right side openings of the pump shell 1, the top end of the water distribution pipe 2 extends obliquely forward, the bottom end of the water distribution pipe 2 is fixedly connected with the base 5, the top end of the two water distribution pipes 2 is fixedly communicated with the flow divider connector 3, the front end of the flow divider connector 3 is fixedly communicated with the water inlet pipe 4, the front side wall of the water distribution pipe 2 is fixedly connected with the supporting leg 6, the bottom end of the supporting leg 6 is inclined forward, the pump shell 1 has an impeller shaft 8, the left and right ends of the impeller shaft 8 penetrate out of the outer wall of the pump shell 1 and the water distribution pipe 2, the left and right ends of the impeller shaft 8 are provided with bearing seats 7, the two ends of the impeller shaft 8 are fixedly sleeved with bearings 9, the impeller shaft 8 is rotatably connected with the bearing seat 7 through the bearing 9, the bearing seat 7 is fixedly connected with the outer wall of the water distribution pipe 2, the inner side of the bearing seat 7 is provided with a water seal inner sleeve 10, the water seal inner sleeve 10 is rotatably connected with the impeller shaft 8, the opposite sides of the two bearing seats 7 are fixedly connected with the gland 11, the left end of the impeller shaft 8 penetrates out of the outer side of the gland 11, the pump shell 1 has two impeller assemblies 12, the impeller assembly 12 is fixedly sleeved on the impeller shaft 8, the impeller assembly 12 is in sliding fit with the inner wall of the pump shell 1, the two impeller assemblies 12 are mirror-symmetrically arranged, the opposite side walls of the two impeller assemblies 12 are fixedly connected, the top opening outer wall of the pump shell 1 is fixedly sleeved with the flange one 13, the top of the pump shell 1 is provided with a water outlet pipe 14, the bottom outer wall of the water outlet pipe 14 is fixedly sleeved with the flange two 15, the water outlet pipe 14 is fixedly communicated with the pump shell 1 through the flange two 15 and the flange one 13, the flange one 13 and the flange two 15 are provided with a check valve.

[0018] The check valve comprises a fixed ring 16, the fixed ring 16 is located between the inner side of the flange one 13 and the flange two 15, the top of the fixed ring 16 is provided with a valve core 20, the valve core 20 is matched with the inner side of the fixed ring 16, the top outer side of the fixed ring 16 is fixedly connected with a fixed plate 17, the outer wall of the fixed plate 17 is fixedly connected with a limiting rod 18, the limiting rod 18 penetrates through the fixed plate 17, the two ends of the limiting rod 18 are fixedly sleeved with torsional springs 19, the two ends of the torsional spring 19 are respectively fixedly connected with the outer wall of the fixed plate 17 and the valve core 20.

[0019] The driving device drives the impeller shaft 8 to rotate, the impeller shaft 8 is rotatably connected with the bearing seat 7 through the bearing 9, the bearing seat 7 is fixedly connected with the outer wall of the water distribution pipe 2, which ensures the stable rotation of the impeller shaft 8.

[0020] When the impeller shaft 8 rotates, the two impeller assemblies 12 are driven to rotate synchronously, so that negative pressure is generated in the pump shell 1 to suck external water flow, the external water flow enters the flow divider connector 3 through the water inlet pipe 4, and then is distributed to the two water distribution pipes 2, since the top end of the water distribution pipe 2 extends obliquely forward, this design helps to guide the water flow to enter the pump more smoothly.

[0021] The water flow enters the pump shell 1 under the action of negative pressure. In the pump shell 1, the rotation of the impeller assembly 12 makes the water flow entering the pump shell 1 gain energy, the flow rate is accelerated, and the pressure is increased.

[0022] The pressurized water flow flows out from the top opening of the pump shell 1, is discharged through the water outlet pipe 14, and a check valve is arranged at the connection between the water outlet pipe 14 and the pump shell 1.

[0023] When the pump is normally working, the water flow flows from the pump shell 1 to the water outlet pipe 14, pushes the valve core 20, and makes the valve core 20 separate from the fixed ring 16, so that the water flow flows smoothly.

[0024] When the pump stops working or the water flow appears a reverse flow trend, the valve core 20 will quickly reset under the action of the torsional spring 19, tightly adhere to the fixed ring 16, and prevent the water flow from flowing back into the pump shell 1.

Claims

1. A self-priming double-suction pump, comprising a pump casing (1), openings on the left, right, and top sides of the pump casing (1), characterized in that, Water distribution pipes (2) are fixedly connected to both the left and right sides of the pump casing (1). The two water distribution pipes (2) are respectively connected to the openings on the left and right sides of the pump casing (1). The top of the water distribution pipe (2) extends forward at an angle. The bottom of the water distribution pipe (2) is fixedly connected to the base (5). The top of the two water distribution pipes (2) is fixedly connected to the distributor connector (3). The front end of the distributor connector (3) is fixedly connected to the inlet pipe (4). The middle of the front side wall of the water distribution pipe (2) is fixedly connected to the support leg (6). The bottom end of the support leg (6) is tilted forward. An impeller shaft (8) is located inside the pump casing (1). Both ends of the impeller shaft (8) extend through the outer walls of the pump casing (1) and the water distribution pipe (2). Bearing seats (7) are located on the outer walls of both ends of the impeller shaft (8). Bearings (9) are fixedly fitted onto the outer walls of both ends of the impeller shaft (8). The impeller shaft (8) is rotatably connected to the bearing seats (7) via the bearings (9). The bearing seats (7) are fixedly connected to the outer wall of the water distribution pipe (2). (7) has a water seal inner sleeve (10) on its inner side. The water seal inner sleeve (10) is rotatably connected to the impeller shaft (8). The opposite sides of the two bearing seats (7) are fixedly connected to the pressure cap (11). The left end of the impeller shaft (8) extends through the outside of the pressure cap (11). The pump casing (1) has two impeller assemblies (12). The impeller assemblies (12) are fixedly sleeved on the impeller shaft (8). The impeller assemblies (12) slide against the inner wall of the pump casing (1). The two impeller assemblies (12) are connected to the impeller shaft (8). 12) Mirror symmetry, the opposite side walls of the two impeller assemblies (12) are fixedly connected, the top opening of the pump casing (1) is fixedly sleeved with flange one (13), the top of the pump casing (1) has a water outlet pipe (14), the bottom outer wall of the water outlet pipe (14) is fixedly sleeved with flange two (15), the water outlet pipe (14) is fixedly connected to the pump casing (1) through flange two (15) and flange one (13), and a check valve is installed between flange one (13) and flange two (15).

2. The self-priming double-suction pump according to claim 1, characterized in that, The check valve includes a fixed ring (16) located between the inner sides of flange one (13) and flange two (15). The top of the fixed ring (16) has a valve core (20) that is adapted to the inner side of the fixed ring (16). A fixed plate (17) is fixedly connected to the outer side of the top of the fixed ring (16). A limiting rod (18) is fixedly connected to the outer wall of the fixed plate (17). The limiting rod (18) passes through the fixed plate (17). Both ends of the limiting rod (18) are slidably sleeved with torsion springs (19). Both ends of the torsion springs (19) are fixedly connected to the outer walls of the fixed plate (17) and the valve core (20), respectively.

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