Water pump with novel overflow hole structure

Abstract

The utility model relates to the field of water pump overflow holes, and discloses a water pump with a novel overflow hole structure, which comprises a pump body, a shaft is arranged in the pump body, a machine seal and an oil seal are sleeved and fixed on the circumference of the shaft, the inner wall of the pump body, the shaft, the machine seal and the oil seal jointly define a closed cavity capable of allowing overflow liquid to flow into, and the side wall of the pump body is provided with an overflow hole. The liquid inlet end of the overflow hole is communicated with the closed cavity, the liquid outlet end is communicated with the water tank of the pump body, and overflow liquid flows back to the water tank from the overflow hole. The overflow hole is communicated with the water tank of the water pump, liquid directly flows back to the water tank and is prevented from directly leaking out of the overflow hole, and the water pump has the advantages of being simple in structure, high in practicability, low in cost, reliable in structure, low in improvement cost and capable of saving manpower and material resources and reducing the customer complaint rate. And a common user does not consider that the water pump goes wrong due to normal trace liquid leakage, and can judge whether the water pump normally leaks liquid or needs to be maintained according to the state of the liquid in the external water pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water pump overflow hole, especially to a novel water pump of overflow hole structure. BACKGROUND

[0002] The water pump is a kind of mechanical device for conveying liquid or pressurizing liquid, and the overflow hole of the water pump is mainly used to discharge the leaked cooling water in time, so as to protect the bearing of the water pump.The overflow hole is located between the mechanical seal and oil seal of the water pump, when the mechanical seal or oil seal of the water pump leaks, the leaked liquid will flow out from the overflow hole of the water pump, and the user or maintenance personnel can determine the sealing condition of the water pump through the leakage of the overflow hole of the water pump, so as to maintain and replace in time.However, under normal circumstances, the mechanical seal of the water pump will leak a small amount of refrigerant during the working process due to structural reasons, and according to the industry standard, the leakage amount ≤1g / h is qualified, but ordinary users do not understand, when they find that there is a slight leakage stain in the overflow hole, they will think that the water pump has a problem and needs to be repaired or replaced, and even will directly complain, which will cause more waste of manpower and material resources. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the problem that ordinary users are easy to think that the water pump has a problem when the normal micro-leakage occurs in the overflow hole in the above background technology, thereby causing waste of manpower and material resources, the utility model provides a novel water pump of overflow hole structure, which is communicated with the water tank of the water pump through the overflow hole, and the liquid directly flows back to the water tank, so as to avoid the liquid from leaking out of the overflow hole directly, and has the advantages of simple structure, strong practicability, low cost, reliable structure, low modification cost, saving of manpower and material resources, reduction of customer complaint rate, ordinary users will not think that the water pump has a problem due to normal micro-leakage, and can determine whether the water pump needs to be repaired or not through the liquid state in the external water pipe.

[0004] The technical scheme of the utility model is as follows:

[0005] A novel water pump of overflow hole structure, comprising a pump body, a shaft is installed in the pump body, a mechanical seal and an oil seal are fixedly arranged on the shaft in a circumferential direction, the inner wall of the pump body, the shaft, the mechanical seal and the oil seal jointly enclose a closed cavity into which the overflow liquid can flow, an overflow hole is formed in the side wall of the pump body, the liquid inlet end of the overflow hole is communicated with the closed cavity, and the liquid outlet end is communicated with the water tank of the pump body, and the overflow liquid flows back to the water tank from the overflow hole.

[0006] Preferably, the overflow hole is formed in the lower part of the pump body.

[0007] Preferably, a boss is fixed on the pump body outside the overflow hole, a through hole is formed in the boss and communicated with the liquid outlet end of the overflow hole, and the through hole is communicated with the water tank.

[0008] Further preferably, the boss is integrally formed with the pump body; the through hole of the boss has a larger diameter than the overflow hole.

[0009] Further preferably, the liquid outlet end of the boss is in communication with the liquid inlet of the water guide pipe, and the liquid outlet of the water guide pipe is in communication with the water tank of the water pump through the external water pipe.

[0010] Further preferably, the liquid inlet and the liquid outlet of the water guide pipe are respectively inserted into the liquid outlet end of the boss and the liquid inlet of the external water pipe, and are in interference fit.

[0011] Further preferably, the water guide pipe and the external water pipe are transparent flexible pipes.

[0012] Compared with the prior art, the above technical solution has the following beneficial effects:

[0013] (1) The water pump with the novel overflow hole structure provided by the present application can make the liquid flowing out of the overflow hole return to the water tank of the water pump through the water guide pipe and the external water pipe, so that there is no liquid overflow on the surface of the pump body, and thus ordinary users will not think that the water pump has a problem when a small amount of refrigerant leaks and flows out of the overflow hole, which can avoid misjudgment by ordinary users, save manpower and material resources, greatly reduce the complaint rate of customers, and directly determine whether there is a real liquid leakage according to the liquid in the pipe body.

[0014] (2) The modification cost of the present application is low, since the boss is integrally connected with the pump body of the water pump, the boss and the water pump can be integrally formed by slightly modifying the manufacturing mold of the pump body of the water pump without changing other components in the water pump, which is practical, low in cost and reliable in structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be described in the manner of referring to the accompanying drawings, in which:

[0016] Fig. 1 is a schematic view of the overall structure of the present application;

[0017] Fig. 2 is a schematic view of the connection structure of the boss and the pipeline of the present application.

[0018] Reference signs: pump body 1, shaft 11, mechanical seal 12, oil seal 13, closed cavity 14, overflow hole 2, boss 21, through hole 211, water guide pipe 22, external water pipe 23. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0020] Example 1: As Figs. 1-2 The pump shown is a novel overflow hole structure, including a pump body 1. A shaft 11 is installed inside the pump body 1. A mechanical seal 12 and an oil seal 13 are circumferentially fitted and fixed on the shaft 11. The mechanical seal 12 is a shaft sealing device used in rotating fluid machinery, usually used to prevent fluid leakage. The oil seal 13 is mainly used for sealing lubricating oil to prevent lubricating oil leakage or external impurities from entering the machine. The mechanical seal 12 and the oil seal 13 are fitted on the shaft 11 and stand opposite each other, with an annular cavity between their opposing surfaces. The inner wall of the pump body 1, the shaft 11, the mechanical seal 12, and the oil seal 13 together form an annular closed cavity 14. That is, the inner wall of the pump body 1 and the shaft 11 serve as the outer and inner annular surfaces of the closed cavity 14, respectively, and the mechanical seal 12 and the oil seal 13 serve as the two sides of the closed cavity 14. Under normal circumstances, a small amount of coolant will also flow into the closed cavity 14 through the mechanical seal 12 side inside the pump body 1.

[0021] An overflow hole 2 is provided on the side wall of the pump body 1, and the overflow hole 2 penetrates the side wall. The overflow hole 2 is located on the side wall of the outer ring surface of the closed cavity 14. Preferably, the overflow hole 2 is located at the lower part of the pump body 1 to facilitate timely discharge of liquid in the closed cavity 14. Thus, the overflow hole 2 penetrating the side wall of the pump body 1 communicates with the closed cavity 14, and the liquid flowing into the closed cavity 14 from the pump body 1 will flow out through the overflow hole 2. The liquid outlet of the overflow hole 2 is connected to the water tank of the water pump. The overflow liquid can flow back to the water tank from the overflow hole 2 instead of overflowing directly outward from the overflow hole 2. There is no liquid overflow on the surface of the pump body 1, so ordinary users will not think that there is a problem with the water pump when there is a normal trace of leakage in the overflow hole 2, which greatly saves manpower and resources and reduces the complaint rate.

[0022] The preferred design is carried out on the basis of Example 1. A cylindrical structure boss 21 is fixed on the pump body 1 outside the overflow hole 2. The boss 21 is integrally fixed with the pump body 1, that is, the boss 21 is integrally formed with the pump body 1 to ensure the stability of the connection, and the connection between the boss 21 and the pump body 1 will not cause liquid leakage. The boss 21 is made of the same material as the pump body 1. A through hole 211 is formed in the boss 21 and communicates with the liquid outlet end of the overflow hole 2. The through hole 211 communicates with the water tank. Specifically, the liquid inlet end of the through hole 211 of the boss 21 communicates with the liquid outlet end of the overflow hole 2. The liquid outlet end of the boss 21 is fixedly connected with a water guide pipe 22, and the liquid outlet end of the boss 21 communicates with the liquid inlet of the water guide pipe 22. The hole diameter of the through hole 211 of the boss 21 is larger than the hole diameter of the overflow hole 2 connected thereto, which is more convenient for connecting the liquid outlet end of the boss 21 with the water guide pipe 22. The provision of the boss 21 increases the length of the overflow hole 2, so that the overflow hole 2 can be expanded outwardly, and the pipeline connected with the water tank can be conveniently installed. The liquid outlet of the water guide pipe 22 is fixedly connected with an external water pipe 23, and communicates with the liquid inlet of the external water pipe 23. The liquid outlet of the external water pipe 23 communicates with the water tank. Thus, the liquid flowing into the closed cavity 14 flows out from the overflow hole 2, and then flows through the boss 21, the water guide pipe 22 and the external water pipe 23 in turn, and then flows back into the water tank. During the entire flow process, the liquid will not leak outside. The user will not complain about the leakage of the water pump if he does not find that the liquid flows out of the water pump. In addition, maintenance personnel can also determine whether the water pump is normally leaking or truly leaking according to the liquid condition in the external water pipe 23 according to the industry standard.

[0023] Further, the liquid inlets and outlets of the water guide pipe 22 and the external water pipe 23 are respectively inserted into the liquid outlet end of the boss 21 and the liquid inlet of the external water pipe 23, and are in interference fit with the liquid inlet and outlet. The two ends of the water guide pipe 22 are pressed into the boss 21 and the external water pipe 23 respectively by external force, so as to avoid liquid leakage at the connection.

[0024] Further, the water guide pipe 22 and the external water pipe 23 are made of transparent pipes. When a small amount of refrigerant flows out from the overflow hole 2 under normal circumstances, only a very small amount of liquid will flow into the external water pipe 23 after passing through the water guide pipe 22. Only when a large amount of refrigerant flows in the external water pipe 23 or oil stains appear in the external water pipe 23, it indicates that the water pump has a leakage problem. In addition, the water guide pipe 22 and the external water pipe 23 are made of transparent pipes, so it is very easy to observe the liquid condition in the pipe body, and it is also more convenient for ordinary users to determine whether a real leakage has occurred.

[0025] Therefore, the water pump with the novel overflow hole structure provided by the application can make the liquid flowing out of the overflow hole 2 return to the water tank of the water pump through the water guide pipe 22 and the external water pipe 23, and there is no liquid overflow on the surface of the pump body 1, so that the ordinary user will not think that the water pump has a problem when the normal micro-refrigerant leakage flows out of the overflow hole 2, the misjudgment of the ordinary user is well avoided, manpower and material resources are saved, the complaint rate of customers can be greatly reduced, and whether the real liquid leakage occurs can be directly judged according to the liquid condition in the pipe body; moreover, the transformation cost of the application is low, since the boss 21 is integrally connected with the pump body 1 of the water pump, the boss 21 and the water pump can be integrally formed by slightly modifying the manufacturing mold of the pump body 1 of the water pump without changing other components in the water pump.

[0026] The above embodiments only express the specific implementation manners of the application, the description is more specific and detailed, but it should not be understood as the limitation on the protection scope of the application. It should be pointed out that, for ordinary skilled in the art, without departing from the technical scheme concept of the application, a number of modifications and improvements can be made, which all belong to the protection scope of the application.

Claims

1. A novel overflow hole structure water pump, comprising a pump body (1), a shaft (11) installed inside the pump body (1), and an organic seal (12) and an oil seal (13) circumferentially sleeved and fixed on the shaft (11), characterized in that: The inner wall of the pump body (1), shaft (11), mechanical seal (12) and oil seal (13) together form an overflow liquid that can flow into a closed cavity (14). An overflow hole (2) is provided on the side wall of the pump body (1). The liquid inlet end of the overflow hole (2) is connected to the closed cavity (14), and the liquid outlet end is connected to the water tank of the pump body (1). The overflow liquid flows back to the water tank from the overflow hole (2). A boss (21) is fixed on the pump body (1) outside the overflow hole (2). A through hole (211) communicating with the liquid outlet end of the overflow hole (2) is opened in the boss (21). The through hole (211) is connected to the water tank. The boss (21) is integrally formed with the pump body (1); the diameter of the through hole (211) of the boss (21) is larger than the diameter of the overflow hole (2); The outlet of the boss (21) is connected to the inlet of the water pipe (22), and the outlet of the water pipe (22) is connected to the water tank of the water pump through the external water pipe (23).

2. The water pump with a novel overflow orifice structure according to claim 1, characterized in that: The overflow hole (2) is located at the bottom of the pump body (1).

3. A water pump with a novel overflow orifice structure according to claim 1, characterized in that: The inlet and outlet of the water pipe (22) are respectively inserted into the outlet end of the boss (21) and the inlet of the external water pipe (23), and are interference-fitted.

4. A water pump with a novel overflow orifice structure according to claim 1, characterized in that: The water inlet pipe (22) and the external water inlet pipe (23) are made of transparent flexible tubing.

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