Self-exhaust structure of centrifugal pump

Abstract

The utility model discloses a self-exhaust structure of a centrifugal pump, which comprises a fixing plate, a pump body fixedly mounted on the upper surface of the fixing plate, a water inlet arranged on the pump body, a collecting barrel fixedly connected with the outer side of a water inlet pipe, a connecting pipe fixedly connected with the top of the collecting barrel, and a pump cavity arranged inside the pump body. The outer side of the pump body is fixedly connected with an exhaust pipe, a round through hole is formed in the exhaust pipe, a matching groove is formed in the exhaust pipe, a floating ball is sleeved with the matching groove, an exhaust hole is formed in the top of the exhaust pipe, and the upper surface of the fixing plate is fixedly connected with a water collecting cylinder which is fixedly connected with one end of a liquid conveying pipe. The difficulty of air in the pump cavity is reduced through the liquid conveying pipe, the rotating cylinder, the threaded rod and the piston, air in the water inlet pipe and the water inlet is sucked into the collecting cylinder through the negative pressure of the pump cavity through the water inlet pipe, the collecting cylinder, the connecting pipe, the exhaust pipe, the matching groove and the floating ball, and the problem that air in the water inlet pipe and the water inlet cannot be exhausted is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a self-exhaust structure of a centrifugal pump. Background Technique

[0002] A centrifugal pump refers to a vane pump that transports liquids by the centrifugal force generated when the impeller rotates. During the rotation of the rotating impeller, due to the interaction between the blades and the liquid, the blades transfer mechanical energy to the liquid, increasing the pressure energy of the liquid to achieve the purpose of transporting the liquid. If the pump cavity of the centrifugal pump is filled with gas before starting, then after starting, when the gas in the center of the impeller is thrown, a large enough vacuum cannot be formed at that place, so the liquid in the tank cannot be sucked up. This phenomenon is called air binding. Therefore, it is necessary to exhaust the centrifugal pump.

[0003] The traditional method is to directly inject water into the pump body before use, so that the air in the pump is discharged from the exhaust port. This is time-consuming and laborious, reducing the exhaust efficiency of the centrifugal pump. In addition, the liquid will carry and decompose air during pipeline transportation, and the air cannot be conveniently discharged at the inlet pipeline and the water inlet of the water pump, thus affecting the transportation efficiency of the centrifugal pump. Content of the Utility Model

[0004] The purpose of the utility model is to provide a self-exhaust structure of a centrifugal pump to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A self-exhaust structure of a centrifugal pump, including a fixed plate, on the upper surface of the fixed plate, a pump body is fixedly installed. An inlet is arranged on the pump body, and one end of the inlet pipe is fixedly connected to the inlet. The outside of the inlet pipe is fixedly connected to a collecting cylinder. The top of the collecting cylinder is fixedly connected to a connecting pipe. A pump cavity is arranged inside the pump body. The outside of the pump body is fixedly connected to an exhaust pipe. A circular through-hole is opened inside the exhaust pipe. A mating groove is arranged inside the exhaust pipe. A floating ball is sleeved inside the mating groove. An exhaust hole is opened at the top of the exhaust pipe. The upper surface of the fixed plate is fixedly connected to a water collecting cylinder. One end of the water collecting cylinder is fixedly connected to an infusion pipe. The water collecting cylinder is rotatably connected to the outside of a rotating cylinder. The outside of the rotating cylinder is fixedly connected to a driven gear. A threaded rod is arranged inside the rotating cylinder. One end of the threaded rod is rotatably connected to a piston. A motor is fixedly installed on the upper surface of the fixed plate. The output end of the motor is fixedly connected to a driving gear. The outside of the pump body is fixedly connected to an outlet.

[0006] Preferably, the inlet pipe is fixedly connected to the pump body through a connecting flange. The collecting cylinder is located above the inlet pipe. The inside of the inlet pipe is connected to the collecting cylinder. The collecting cylinder is communicated with the inside of the pump cavity through a connecting pipe.

[0007] Preferably, the exhaust pipe is located at the top of the pump body, and the exhaust pipe is communicated with the inside of the pump chamber through a circular through hole.

[0008] Preferably, the inside of the floating ball is hollow, the floating ball is slidably connected with the fitting groove, and the diameters of the upper and lower ends of the fitting groove are smaller than the diameter of the floating ball.

[0009] Preferably, a water collecting chamber is arranged inside the water collecting cylinder, both ends of the infusion pipe are communicated with the pump chamber and the water collecting chamber respectively, and the inside of the water collecting cylinder is slidably connected with the piston.

[0010] Preferably, a threaded groove is formed inside the rotating cylinder, and the rotating cylinder is threadedly connected with the outer side of the threaded rod through the threaded groove.

[0011] Preferably, the outer side of the driven gear is meshed and connected with the driving gear.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] By arranging a water collecting cylinder, an infusion pipe, a rotating cylinder, a driven gear, a threaded rod and a piston, the driving gear drives the driven gear and the rotating cylinder to rotate synchronously through a motor, so that the threaded rod drives the piston to move inside the water collecting cylinder, thereby injecting the water inside the water collecting cylinder into the pump chamber through the infusion pipe, and enabling the air inside the pump chamber to be discharged from the exhaust pipe, effectively reducing the difficulty for the staff to discharge the air inside the pump chamber before use, improving the efficiency of the staff, and without the need to connect an external water supply device, the operation is convenient.

[0014] The present utility model also simultaneously arranges a water inlet pipe, a collecting cylinder, a connecting pipe, an exhaust pipe, a fitting groove and a floating ball. The rotation of the impeller inside the pump chamber forms a negative pressure, so that the air near the water inlet pipe and the water inlet is inhaled into the collecting cylinder, and then enters the pump chamber through the connecting pipe and is discharged from the water outlet together with the liquid, solving the problem that the air at the water inlet pipe and the water inlet cannot be discharged. Through the fitting groove and the floating ball, after the air inside the pump chamber is discharged, the liquid level rises, causing the floating ball to move upward until the floating ball closes the circular through hole, thereby preventing the liquid inside the pump chamber from being discharged from the exhaust pipe, and achieving the effect of automatic exhaust. Description of the Drawings

[0015] Figure 1 is the overall structural schematic diagram of the present utility model;

[0016] Figure 2 is the sectional view of the connection structure of the water inlet pipe of the present utility model;

[0017] Figure 3 is the sectional view of the internal structure of the exhaust pipe of the present utility model;

[0018] Figure 4 is the sectional view of the internal structure of the water collecting cylinder of the present utility model.

[0019] In the figure: 1, fixed plate; 2, pump body; 3, water inlet; 4, water inlet pipe; 5, collection cylinder; 6, connecting pipe; 7, pump chamber; 8, exhaust pipe; 9, circular through hole; 10, mating groove; 11, floating ball; 12, exhaust hole; 13, water collecting cylinder; 14, infusion pipe; 15, rotating cylinder; 16, driven gear; 17, threaded rod; 18, piston; 19, motor; 20, driving gear; 21, water outlet. Specific implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0021] Please refer to Figures 1-4 , the present invention provides a technical solution: a self-exhaust structure of a centrifugal pump, including a fixed plate 1, the upper surface of the fixed plate 1 is fixedly connected to the pump body 2 by bolts, a water inlet 3 is arranged on the side of the pump body 2, one end of the water inlet 3 is fixedly welded to the water inlet pipe 4, the outside of the water inlet pipe 4 is fixedly welded to the collection cylinder 5, the collection cylinder 5 is composed of two cylinders with different diameters connected, the cylinder with a smaller diameter is fixedly welded to the water inlet pipe 4, the top of the collection cylinder 5 is fixedly welded to the connecting pipe 6, a pump chamber 7 is arranged inside the pump body 2, an impeller is arranged inside the pump chamber 7, the outside of the pump body 2 is fixedly welded to the exhaust pipe 8, the exhaust pipe 8 is located above the pump chamber 7, a circular through hole 9 is opened inside the exhaust pipe 8, the circular through hole 9 penetrates the bottom of the exhaust pipe 8, a mating groove 10 is arranged inside the exhaust pipe 8, a floating ball 11 is sleeved inside the mating groove 10, an exhaust hole 12 is opened at the top of the exhaust pipe 8, the upper surface of the fixed plate 1 is fixedly welded to the water collecting cylinder 13, the water collecting cylinder 13 is fixedly welded to one end of the infusion pipe 14, the water collecting cylinder 13 is rotatably connected to the outside of the rotating cylinder 15, the outside of the rotating cylinder 15 is fixedly welded to the driven gear 16, the rotating cylinder 15 is threadedly connected to the outside of the threaded rod 17, one end of the threaded rod 17 is rotatably connected to the piston 18, the upper surface of the fixed plate 1 is fixedly connected to the motor 19 by bolts, the output end of the motor 19 is fixedly welded to the driving gear 20, and the outside of the pump body 2 is fixedly welded to the water outlet 21.

[0022] In order to enhance the air discharge effect of the water inlet pipe 4 and the water inlet 3, the water inlet pipe 4 is fixedly welded to the pump body 2 through a connecting flange. The collecting cylinder 5 is located above the water inlet pipe 4. The inside of the water inlet pipe 4 is connected to the collecting cylinder 5. The collecting cylinder 5 is internally connected to the pump chamber 7 through a connecting pipe 6. A number of collecting cylinders 5 can be provided on the water inlet pipe 4. When air is generated during the liquid transportation inside the water inlet pipe 4, the air moves upward and enters the inside of the collecting cylinder 5. The negative pressure in the pump chamber 7 is used to suck the air inside the collecting cylinder 5 into the pump chamber 7 through the connecting pipe 6 and discharge it along with the liquid, achieving the effect of self-exhausting air.

[0023] In order to reduce the difficulty of exhausting air before using the pump body 2, a water collecting chamber is provided inside the water collecting cylinder 13. Both ends of the liquid delivery pipe 14 are connected to the pump chamber 7 and the water collecting chamber respectively. The inside of the water collecting cylinder 13 is slidably connected to the piston 18. A threaded groove is provided inside the rotating cylinder 15. The rotating cylinder 15 is threadedly connected to the outside of the threaded rod 17 through the threaded groove. The outside of the driven gear 16 is meshed and connected to the driving gear 20.

[0024] In order to further reduce the workload of the staff in manually opening and closing the exhaust pipe 8, the exhaust pipe 8 is located at the top of the pump body 2. The exhaust pipe 8 is internally connected to the pump chamber 7 through a circular through hole 9. The inside of the floating ball 11 is hollow. The floating ball 11 is slidably connected to the mating groove 10. The diameters of the upper and lower ends of the mating groove 10 are smaller than the diameter of the floating ball 11. The continuously rising liquid level inside the pump chamber 7 will push the floating ball 11 to move upward inside the mating groove 10 until the floating ball 11 moves to the top of the mating groove 10 and blocks and closes the circular through hole 9. At this time, all the air inside the pump chamber 7 is exhausted. By blocking the circular through hole 9 with the floating ball 11, it is avoided that the liquid inside the pump chamber 7 is discharged from the exhaust pipe 8.

[0025] Working principle: Before the staff uses the pump body 2, the driving gear 20 is rotated through the motor 19. The rotating cylinder 15 and the driven gear 16 are driven to rotate synchronously by the driving gear 20, so that the threaded rod 17 moves inside the rotating cylinder 15 and drives the piston 18 to move to the left, thereby injecting the water inside the water collecting cylinder 13 into the pump chamber 7 through the liquid delivery pipe 14. Thus, the air inside the pump chamber 7 is squeezed. The air pushes the floating ball 11 upward and discharges upward from the gap between the mating groove 10 and the floating ball 11 and from the exhaust hole 12. As the liquid level inside the pump chamber 7 continuously rises, the liquid level will push the floating ball 11 to move upward inside the mating groove 10 until the floating ball 11 moves to the top of the mating groove 10 and blocks and closes the circular through hole 9. At this time, all the air inside the pump chamber 7 is exhausted. By blocking the circular through hole 9 with the floating ball 11, it is avoided that the liquid inside the pump chamber 7 is discharged from the exhaust pipe 8. When air is generated during the liquid transportation inside the water inlet pipe 4, it enters the inside of the collecting cylinder 5. The rotation of the impeller inside the pump chamber 7 will form a negative pressure, thereby sucking the air inside the collecting cylinder 5 into the pump chamber 7 through the connecting pipe 6, and then discharging it together with the liquid inside the pump chamber 7 from the water outlet 21, avoiding the accumulation of air near the water inlet pipe 4 and the water inlet 3.

[0026] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Self-exhaust structure of a centrifugal pump, including a fixing plate (1), characterized in that: On the upper surface of the fixed plate (1), a pump body (2) is fixedly installed. An inlet (3) is provided on the pump body (2). One end of the inlet pipe (4) is fixedly connected to the inlet (3). The outer side of the inlet pipe (4) is fixedly connected to the collection cylinder (5). The top of the collection cylinder (5) is fixedly connected to the connecting pipe (6). A pump chamber (7) is arranged inside the pump body (2). The outer side of the pump body (2) is fixedly connected to the exhaust pipe (8). A circular through-hole (9) is opened inside the exhaust pipe (8). A mating groove (10) is arranged inside the exhaust pipe (8). A floating ball (11) is sleeved inside the mating groove (10). An exhaust hole (12) is opened at the top of the exhaust pipe (8). The upper surface of the fixed plate (1) is fixedly connected to the water collection cylinder (13). One end of the water collection cylinder (13) is fixedly connected to the infusion pipe (14). The outer side of the water collection cylinder (13) is rotatably connected to the outer side of the rotating cylinder (15). The outer side of the rotating cylinder (15) is fixedly connected to the driven gear (16). A threaded rod (17) is arranged inside the rotating cylinder (15). One end of the threaded rod (17) is rotatably connected to the piston (18). A motor (19) is fixedly installed on the upper surface of the fixed plate (1). The output end of the motor (19) is fixedly connected to the driving gear (20). The outer side of the pump body (2) is fixedly connected to the outlet (21).

2. The self-venting structure of a centrifugal pump according to claim 1, characterized in that: The inlet pipe (4) is fixedly connected to the pump body (2) through a connecting flange. The collection cylinder (5) is located above the inlet pipe (4). The inside of the inlet pipe (4) is connected to the collection cylinder (5). The collection cylinder (5) is communicated with the inside of the pump chamber (7) through the connecting pipe (6).

3. The self-exhaust structure of a centrifugal pump according to claim 1, characterized in that: The exhaust pipe (8) is located at the top of the pump body (2). The exhaust pipe (8) is communicated with the inside of the pump chamber (7) through the circular through-hole (9).

4. The self-venting structure of a centrifugal pump according to claim 1, characterized in that: The inside of the floating ball (11) is hollow. The floating ball (11) is slidably connected to the mating groove (10). The diameters of the upper and lower ends of the mating groove (10) are smaller than the diameter of the floating ball (11).

5. The self-exhausting structure of a centrifugal pump according to claim 1, characterized in that: A water collection chamber is arranged inside the water collection cylinder (13). Both ends of the infusion pipe (14) are communicated with the pump chamber (7) and the water collection chamber respectively. The inside of the water collection cylinder (13) is slidably connected to the piston (18).

6. The self-exhausting structure of a centrifugal pump according to claim 1, characterized in that: A threaded groove is opened inside the rotating cylinder (15). The rotating cylinder (15) is threadedly connected to the outer side of the threaded rod (17) through the threaded groove.

7. The self-exhaust structure of a centrifugal pump according to claim 1, characterized in that: The outer side of the driven gear (16) is meshed with the driving gear (20).

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