Bidirectional pump

Abstract

The utility model provides a two-way pump, and belongs to the technical field of water pumps. A two-way pump comprises a pump shell, a pump head provided with a first water conveying hole and a second water conveying hole is connected to the pump shell, an impeller capable of rotating and a flow guide piece connected with the pump shell in a sealed mode are arranged between the pump shell and the pump head, the impeller is located above the flow guide piece, the flow guide piece is provided with an annular flow guide channel, and a partition plate is arranged between the first water conveying hole and the second water conveying hole. One side of the partition plate is provided with a first water conveying channel communicated with the first water conveying hole, the other side of the partition plate is provided with a second water conveying channel communicated with the second water conveying hole, and the first water conveying channel and the second water conveying channel are vertically arranged and communicated with the flow guide channel. The annular flow guide channel enables the impeller to pump water during forward rotation and reverse rotation, the first water conveying channel and the second water conveying channel are vertically arranged, the position of the annular flow guide channel enables the water conveying efficiency of the impeller during forward rotation or reverse rotation to be the same, and the water conveying efficiency of the pump is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a bidirectional pump. Background Art

[0002] Water pumps are commonly used equipment for conveying fluids and are widely used in various fields. Water pumps are usually composed of a pump head and a pump casing. As disclosed in the Chinese patent application No. 202220974482.0, a centrifugal pump and its pump head structure include a pump casing, a pump cover and an impeller assembly. The pump casing includes a shell body and a liquid outlet nozzle integrally formed on the side of the shell body, the shell body is provided with a receiving chamber, the liquid outlet nozzle is provided with a liquid outlet channel connected to the receiving chamber, the shell body is provided with a first sealing surface extending along the circumference of the receiving chamber, the liquid outlet nozzle is provided with a second sealing surface extending along the circumference of the inlet side of the liquid outlet channel, the first sealing surface and the second sealing surface are connected to form a continuous annular sealing surface, the pump cover seal is engaged with the annular sealing surface, an impeller chamber is formed between the pump cover and the receiving chamber, the pump cover is provided with a liquid inlet channel connected to the impeller chamber, the impeller assembly is rotatably mounted on the impeller chamber, a plurality of blades are provided on the side of the impeller assembly facing the pump cover, the receiving chamber is a rotary chamber structure, and the liquid outlet channel extends along the tangential direction of the receiving chamber.

[0003] The liquid outlet channel in the above scheme extends along the tangential direction of the rotation direction of the impeller assembly. Such a configuration allows the direction in which the fluid is thrown out when the impeller assembly rotates to be relatively consistent with the extension direction of the liquid outlet channel, so that the fluid thrown out by the impeller assembly can better flow into the liquid outlet channel. However, when the rotation direction of the impeller in the above scheme is reversed, the fluid throwing direction is inconsistent with the extension direction of the liquid outlet channel, resulting in the water pump being unable to work normally and the water delivery efficiency being unable to be guaranteed. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems in the existing technology and propose a bidirectional pump. The technical problem to be solved by the utility model is: how to ensure the normal operation and water delivery efficiency of the water pump when the impeller rotates in both directions.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a bidirectional pump, including a pump casing, a pump head having a first water conveying hole and a second water conveying hole is connected to the pump casing, and the characteristic is that a rotatable impeller and a flow guide member sealed with the pump casing are provided between the pump casing and the pump head, the impeller is located above the flow guide member, the flow guide member has an annular flow guide channel, a partition is provided between the first water conveying hole and the second water conveying hole, one side of the partition has a first water conveying channel communicating with the first water conveying hole, and the other side of the partition has a second water conveying channel communicating with the second water conveying hole, and the first water conveying channel and the second water conveying channel are vertically arranged and communicated with the flow guide channel.

[0006] The impeller rotates in any direction, and the fluid enters the pump head from the second water delivery hole and contacts the impeller through the vertical second water delivery channel. The rotation of the impeller causes the fluid to flow in the direction of the impeller's rotation and passes through the annular guide channel. The fluid forms an annular path along the guide channel and then flows out of the first water delivery hole through the first water delivery channel to form a bidirectional pump. The annular guide channel enables the impeller to pump water in both forward and reverse rotation, and the vertical arrangement of the first and second water delivery channels and the position of the annular guide channel enable the impeller to have the same water delivery efficiency in forward or reverse rotation, thereby ensuring the water delivery efficiency of the pump.

[0007] In the above-mentioned bidirectional pump, the flow guide is in a bowl shape, the inner bottom surface of the flow guide is a flow guide plane, the flow guide plane and the inner side wall of the flow guide form the flow guide channel, the bottom of the flow guide is provided with an inlet hole, a rotor is provided in the pump housing, the output end of the rotor passes through the inlet hole and is connected to the impeller. The fluid entering the bidirectional pump from the first water delivery channel or the second water delivery channel flows along the rotation direction of the impeller under the rotation of the impeller, and the fluid flows along the flow guide plane and the inner side wall annular path of the bowl-shaped flow guide and then flows out of the bidirectional pump from the other water delivery channel.

[0008] In the above-mentioned bidirectional pump, an annular sealing portion extends downward from the edge of the guide hole, and a sealing sleeve is provided between the rotor and the sealing portion. The sealing portion can increase the contact area of ​​the sealing sleeve and improve the sealing performance.

[0009] In the above-mentioned bidirectional pump, the impeller has a fixed part in an annular shape which is sleeved on the output end of the rotor, and the fixed part has an annular rotating part outside. A plurality of first guide vanes are evenly distributed along the circumference of the rotating part, and a second guide vane is provided between two adjacent first guide vanes, and the length of the first guide vane is greater than the length of the second guide vane. The evenly distributed first guide vanes and second guide vanes can ensure the balance of the impeller rotation, the first guide vane is longer in length and can better guide and control the flow of the liquid, and the second guide vane is shorter and can be used to balance the flow velocity of the liquid flow and increase energy conversion, thereby improving the water delivery efficiency.

[0010] In the above-mentioned bidirectional pump, the height of one end of the first guide vane and the second guide vane close to the fixed part is higher than the height of one end close to the edge of the annular rotating part. The different heights of the two ends of the first guide vane and the second guide vane make the tops of the first guide vane and the second guide vane inclined, and the height of the parts close to the axis is higher, so that the fluid can be directed to the guide member when the impeller rotates.

[0011] In the above-mentioned bidirectional pump, the top of the pump housing has a planar bearing surface, the bearing surface has a plurality of upwardly protruding fixing springs, the top of the pump housing is connected to a connecting flange, the fixing springs are clamped on the connecting flange to fix the connecting flange to the pump housing, the pump head cover is arranged on the connecting flange, and the pump head is fixed to the connecting flange by a screw cover. The setting of the fixing springs can conveniently fix the connecting flange to the pump housing, the operation is simple, and the convenience of assembly is improved.

[0012] In a bidirectional pump for upward delivery, the connecting flange has an annular abutting edge along the outer circumference, the screw cover has a limiting convex edge abutting against the abutting edge, the screw cover is screwed to the pump head and abuts the connecting flange against the pump head. The pump head and the connecting flange are abutted against each other through the screw cover, which has a simple structure and is easy to load and unload.

[0013] In the above-mentioned bidirectional pump, the edge of the upper end of the flow guide is pressed between the pump head and the connecting flange. The flow guide is fixed by pressing the pump head and the connecting flange, which ensures the stability of the flow guide.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] 1. The fluid entering the bidirectional pump from the first water delivery channel or the second water delivery channel flows along the rotation direction of the impeller under the rotation of the impeller. The fluid flows along the guide plane and the inner wall annular path of the bowl-shaped guide member and then flows out of the bidirectional pump from the other water delivery channel.

[0016] 2. The evenly distributed first guide vanes and second guide vanes can ensure the balanced rotation of the impeller. The longer first guide vanes can better guide and control the flow of liquid, and the shorter second guide vanes can be used to balance the flow rate of the liquid and increase energy conversion, thereby improving water delivery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the bidirectional pump.

[0018] Figure 2 It is a partial structural schematic diagram of the bidirectional pump.

[0019] Figure 3 It is a cross-sectional view of the overall structure of the bidirectional pump.

[0020] Figure 4 This is a partial structural exploded view of the bidirectional pump.

[0021] Figure 5 yes Figure 3 Magnified view of area A.

[0022] In the figure, 1, pump casing; 11, bearing surface; 12, fixing spring piece; 2, pump head; 21, first water delivery hole; 22, second water delivery hole; 23, partition; 24, first water delivery channel; 25, second water delivery channel; 3, impeller; 31, fixing part; 32, annular rotating part; 33, first guide vane; 34, second guide vane; 4, guide member; 41, guide channel; 42, guide plane; 44, guide hole; 45, sealing part; 5, rotor; 6, sealing sleeve; 7, connecting flange; 71, abutment; 8, screw cover; 81, limiting convex edge. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to the following embodiments.

[0024] like Figures 1 to 5 As shown, a bidirectional pump comprises a pump casing 1, to which a pump head 2 having a first water conveying hole 21 and a second water conveying hole 22 is connected, a rotatable impeller 3 and a flow guide member 4 sealed and connected to the pump casing 1 are arranged between the pump casing 1 and the pump head 2, the impeller 3 is located above the flow guide member 4, the flow guide member 4 has an annular flow guide channel 41, a partition plate 23 is provided between the first water conveying hole 21 and the second water conveying hole 22, one side of the partition plate 23 has a first water conveying channel 24 communicated with the first water conveying hole 21, the other side of the partition plate 23 has a second water conveying channel 25 communicated with the second water conveying hole 22, the first water conveying channel 24 and the second water conveying channel 25 are vertically arranged and communicated with the flow guide channel 41. Among them, the guide member 4 is bowl-shaped, the inner bottom surface of the guide member 4 is a guide plane 42, the guide plane 42 and the inner side wall of the guide member 4 form a guide channel 41, and an inlet hole 44 is opened at the bottom of the guide member 4. A rotor 5 is arranged in the pump housing 1, and the output end of the rotor 5 passes through the inlet hole 44 and is connected to the impeller 3. An annular sealing portion 45 extends downward from the edge of the inlet hole 44, and a sealing sleeve 6 is arranged between the rotor 5 and the sealing portion 45.

[0025] The impeller 3 described above has an annular fixed portion 31 which is sleeved on the output end of the rotor 5, and an annular rotating portion 32 is provided outside the fixed portion 31. A plurality of first guide vanes 33 are evenly distributed along the circumference of the rotating portion, and a second guide vane 34 is provided between two adjacent first guide vanes 33. The length of the first guide vane 33 is greater than the length of the second guide vane 34, and the height of one end of the first guide vane 33 and the second guide vane 34 close to the fixed portion 31 is higher than the height of one end close to the edge of the annular rotating portion 32.

[0026] The top of the pump housing 1 has a planar bearing surface 11, and the bearing surface 11 has a plurality of upwardly protruding fixing springs 12. The top of the pump housing 1 is connected to a connecting flange 7, and the fixing springs 12 are clamped on the connecting flange 7 to fix the connecting flange 7 to the pump housing 1. The pump head 2 is covered on the connecting flange 7, and the pump head 2 is fixed to the connecting flange 7 by a screw cover 8. The connecting flange 7 has an annular abutting edge 71 along the outer periphery, and the screw cover 8 has a limiting convex edge 81 abutting against the abutting edge 71. The screw cover 8 is screwed to the pump head 2 and the connecting flange 7 is pressed against the pump head 2, and the edge of the upper end of the guide member 4 is pressed between the pump head 2 and the connecting flange 7.

[0027] The impeller 3 rotates in any direction, and the fluid enters the pump head 2 from the second water delivery hole 22, and contacts the impeller 3 through the vertical second water delivery channel 25. The impeller 3 rotates to make the fluid flow in the direction of rotation of the impeller 3 and passes through the annular guide channel 41. The fluid forms an annular path along the guide channel 41 and then flows out of the first water delivery hole 21 through the first water delivery channel 24 to form a bidirectional pump. The annular guide channel 41 enables the impeller 3 to pump water in both forward and reverse rotation, and the first water delivery channel 24 and the second water delivery channel 25 are arranged vertically with the position of the annular guide channel 41 so that the impeller 3 has the same water delivery efficiency in forward or reverse rotation, thereby ensuring the water delivery efficiency of the pump.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0029] Although the present invention uses more terms such as pump housing 1, bearing surface 11, fixed spring 12, pump head 2, first water delivery hole 21, second water delivery hole 22, partition 23, first water delivery channel 24, second water delivery channel 25, impeller 3, fixed part 31, annular rotating part 32, first guide vane 33, second guide vane 34, guide member 4, guide channel 41, guide plane 42, guide hole 44, sealing part 45, rotor 5, sealing sleeve 6, connecting flange 7, abutment 71, screw cover 8, limiting convex edge 81, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model. It is contrary to the spirit of the utility model to interpret them as any additional restrictions.

Claims

1. A bidirectional pump, comprising a pump housing (1), to which a pump head (2) having a first water delivery hole (21) and a second water delivery hole (22) is connected, characterized in that: A rotatable impeller (3) and a flow guide member (4) sealed with the pump housing (1) are provided between the pump housing (1) and the pump head (2); the impeller (3) is located above the flow guide member (4); the flow guide member (4) has an annular flow guide channel (41); a partition plate (23) is provided between the first water transfer hole (21) and the second water transfer hole (22); one side of the partition plate (23) has a first water transfer channel (24) communicating with the first water transfer hole (21); the other side of the partition plate (23) has a second water transfer channel (25) communicating with the second water transfer hole (22); the first water transfer channel (24) and the second water transfer channel (25) are vertically arranged and communicate with the flow guide channel (41).

2. A bidirectional pump according to claim 1, characterized in that: The flow guide member (4) is bowl-shaped, the inner bottom surface of the flow guide member (4) is a flow guide plane (42), the flow guide plane (42) and the inner side wall of the flow guide member (4) form the flow guide channel (41), the bottom of the flow guide member (4) is provided with an inlet hole (44), a rotor (5) is provided in the pump housing (1), and the output end of the rotor (5) passes through the inlet hole (44) and is connected to the impeller (3).

3. A bidirectional pump according to claim 2, characterized in that: An annular sealing portion (45) extends downward from the edge of the guide hole (44), and a sealing sleeve (6) is provided between the rotor (5) and the sealing portion (45).

4. A bidirectional pump according to claim 2 or 3, characterized in that: The impeller (3) comprises an annular fixed portion (31) sleeved on the output end of the rotor (5), an annular rotating portion (32) being provided outside the fixed portion (31), a plurality of first guide vanes (33) being evenly distributed along the circumference of the rotating portion, a second guide vane (34) being provided between two adjacent first guide vanes (33), and a length of the first guide vane (33) being greater than a length of the second guide vane (34).

5. A bidirectional pump according to claim 4, characterized in that: The height of one end of the first guide plate (33) and the second guide plate (34) close to the fixed portion (31) is higher than the height of one end close to the edge of the annular rotating portion (32).

6. A bidirectional pump according to claim 3, characterized in that: The top of the pump housing (1) has a planar bearing surface (11), the bearing surface (11) has a plurality of upwardly protruding fixing springs (12), the top of the pump housing (1) is connected to a connecting flange (7), the fixing springs (12) are snap-fitted onto the connecting flange (7) to fix the connecting flange (7) onto the pump housing (1), the pump head (2) is covered on the connecting flange (7), and the pump head (2) is fixed to the connecting flange (7) via a screw cover (8).

7. A bidirectional pump according to claim 6, characterized in that: The connecting flange (7) has an annular abutting edge (71) along the outer circumference, the screw cover (8) has a limiting convex edge (81) abutting against the abutting edge (71), and the screw cover (8) is screwed to the pump head (2) and tightly abuts the connecting flange (7) against the pump head (2).

8. A bidirectional pump according to claim 7, characterized in that: The edge of the upper end of the flow guide (4) is pressed tightly between the pump head (2) and the connecting flange (7).

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