Water injection structure of centrifugal water pump

Abstract

The utility model provides a water injection structure of a centrifugal water pump and belongs to the technical field of water pumps. The problem that an existing centrifugal water pump is inconvenient to use is solved. The centrifugal water pump water injection structure comprises a pump shell with a pump cavity, a protruding block is formed at the top of the pump shell, an exhaust hole vertically penetrates through the top wall of the protruding block, the lower end of the exhaust hole communicates with the pump cavity, a water injection hole horizontally penetrates through one side of the protruding block, the inner end of the water injection hole extends to the hole wall of the lower end of the exhaust hole, and the water injection hole communicates with the exhaust hole; the upper end of the air guide channel is communicated with the upper end of the exhaust hole, and the lower end of the air guide channel is communicated with the pump cavity; a blocking piece is detachably fixed in the exhaust hole and used for separating the exhaust hole and the water injection hole and separating the exhaust hole and the outside of the pump shell at the same time. The centrifugal water pump water injection structure is convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a centrifugal water pump, in particular to a water injection structure of a centrifugal water pump. Background Art

[0002] A centrifugal water pump, also known as a centrifugal water pump or centrifugal pump, is a machine that uses the centrifugal motion of water to pump water.

[0003] Before starting an existing centrifugal pump, it is generally necessary to inject water to empty the air in the pump cavity. This part of the structure is a centrifugal pump structure disclosed in the China Patent Library (application number: 201620077608.9), which includes a base and a pump body installed on the base; a water inlet is provided on the side of the arc-shaped outer shell of the pump body, and a water outlet is provided on the upper side of the pump body, and the water outlet is connected to the flange; it also includes a three-way connector, which is assembled on the upper part of the other side of the arc-shaped outer shell of the pump body away from the water outlet and communicates with the inside of the pump body; a water injection port, an exhaust port and a pressure gauge are respectively provided on the three ports of the three-way connector.

[0004] When the above centrifugal pump is in operation, the water inlet and the exhaust port need to be closed at the same time, which results in many operating steps and complicated operations. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a centrifugal water pump water injection structure that is convenient to use.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a centrifugal water pump water injection structure, comprising a pump casing with a pump cavity, characterized in that a bulge is formed on the top of the pump casing, an exhaust hole is vertically penetrated on the top wall of the bulge, and the lower end of the exhaust hole is connected to the above-mentioned pump cavity, a water injection hole is horizontally penetrated on one side of the bulge, the inner end of the water injection hole extends to the hole wall at the lower end of the exhaust hole, and the water injection hole and the exhaust hole are connected; an air guide channel is also provided in the bulge, the upper end of the air guide channel is connected to the upper end of the exhaust hole, and the lower end of the air guide channel is connected to the above-mentioned pump cavity; a plugging piece is detachably fixed in the exhaust hole, and the plugging piece is used to simultaneously isolate the exhaust hole and the water injection hole as well as the exhaust hole and the outside of the pump casing.

[0007] When in use, the sealing piece is removed, and water is poured into the pump cavity through the water injection hole; the air in the pump cavity enters the exhaust hole through the air guide channel, and is finally discharged upward through the upper port of the exhaust hole.

[0008] The present application only needs to install one sealing member to simultaneously isolate the exhaust hole and the water injection hole as well as the exhaust hole and the outside of the pump casing, so as to effectively reduce the assembly steps and has the advantages of being easy and convenient to use.

[0009] In the above-mentioned centrifugal water pump water injection structure, the above-mentioned plugging member is a rod-shaped rubber plug. The shape and size of the rubber plug match the exhaust hole. The rubber plug is inserted into the exhaust hole, and the upper end of the rubber plug extends out of the exhaust hole. With the above design, the side wall of the rubber plug is in close contact with the inner wall of the exhaust hole to form a seal. In this way, the plugging can be achieved by inserting and pulling out the rubber plug, which has the advantages of simple structure and convenient use.

[0010] In the above-mentioned centrifugal water pump water injection structure, the lower end of the rubber plug extends out of the exhaust hole to effectively extend the sealing path formed between the rubber plug and the exhaust hole, ensuring the stable operation of the centrifugal water pump.

[0011] In the above-mentioned centrifugal water pump water injection structure, a conical guiding surface is formed on the outer side wall of the lower end of the rubber plug. The diameter of the guiding surface gradually decreases from top to bottom, and the guiding surface extends to the bottom surface of the rubber plug. The guiding surface is provided for guiding the insertion of the rubber plug, further facilitating the insertion and extraction.

[0012] In the above-mentioned centrifugal water pump water injection structure, a limiting seat is formed on the outer wall of the upper end of the rubber plug. The limiting seat is an annular shape coaxial with the rubber plug, and the limiting seat presses on the top surface of the convex block. The setting of the limiting seat is used for limiting the insertion of the rubber plug, so that the rubber plug can be installed in place at one time for convenient assembly, and can also extend the sealing performance formed between the rubber plug and the pump housing, further ensuring the stable operation of the centrifugal pump.

[0013] As another solution, in the above-mentioned centrifugal water pump water injection structure, the plugging member is a plug column screwed into the exhaust hole, and the upper end of the plug column extends out of the exhaust hole; two annular grooves are formed on the outer wall of the plug column, and sealing rings are arranged in both annular grooves. The outer side wall of the sealing ring is in contact with the inner side wall of the exhaust hole for sealing, and the upper port of the air guiding channel and the inner port of the water injection hole are both between the two sealing rings.

[0014] In the above-mentioned centrifugal water pump water injection structure, the air guiding channel includes a horizontally arranged upper air hole and a vertically arranged lower air hole. Both ends of the lower air hole are respectively communicated with the upper air hole and the pump cavity, and one end of the upper air hole is closed and the other end is communicated with the above-mentioned exhaust hole. With the above design, it is convenient for the design and processing of the air guiding channel.

[0015] In the above-mentioned centrifugal water pump water injection structure, the pump housing is a casting integral part.

[0016] Compared with the prior art, the centrifugal water pump water injection structure of the present application has the following advantages:

[0017] 1. The present application only needs to install one plugging member to simultaneously block the exhaust hole and the water injection hole as well as the exhaust hole and the outside of the pump housing, effectively reducing the assembly steps, and has the advantages of convenient and easy use.

[0018] 2. The rubber plug is inserted into the exhaust hole, and the side wall of the rubber plug is in close contact with the inner wall of the exhaust hole to form a seal. In this way, the rubber plug can be plugged and unplugged to achieve sealing, which has the advantages of simple structure and convenient use.

[0019] 3. The setting of the limit seat is used not only to limit the insertion of the rubber plug so that the rubber plug can be installed in place at one time for convenient assembly, but also to extend the sealing performance formed between the rubber plug and the pump shell, further ensuring the stable operation of the centrifugal pump. Description of the Drawings

[0020] Figure 1 is a three-dimensional schematic diagram of a centrifugal water pump.

[0021] Figure 2 is a cross-sectional schematic diagram of a centrifugal water pump.

[0022] Figure 3 is a connection schematic diagram of the exhaust hole, the water injection hole and the air guide channel.

[0023] In the figure, 1. Pump shell; 1a. Pump cavity; 2. Convex block; 2a. Exhaust hole; 2b. Water injection hole; 2c. Air guide channel; 2c1. Upper air hole; 2c2. Lower air hole; 3. Rubber plug; 3a. Introduction surface; 3b. Limit seat. Detailed Embodiments

[0024] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0025] Embodiment 1

[0026] As Figure 1 shown, the water injection structure of this centrifugal water pump includes a pump shell 1 with a pump cavity 1a, and a convex block 2 is formed on the top of the pump shell 1. In actual products, the pump shell 1 and the convex block 2 are of an integral structure, and preferably the pump shell 1 is a casting integral part.

[0027] Among them,

[0028] As Figure 2 and Figure 3As shown, an exhaust hole 2a vertically penetrates through the top wall of the bump 2, and the lower end of the exhaust hole 2a communicates with the above-mentioned pump chamber 1a. A water injection hole 2b horizontally penetrates through one side of the bump 2. At this time, the axes of the water injection hole 2b and the exhaust hole 2a are perpendicular to each other. The outer port of the water injection hole 2b is on the outer surface of the bump 2, and the inner end of the water injection hole 2b extends to the lower end hole wall of the exhaust hole 2a, and the water injection hole 2b and the exhaust hole 2a are communicated. A gas guide channel 2c is also provided in the bump 2. The upper end of the gas guide channel 2c communicates with the upper end of the exhaust hole 2a, and the lower end of the gas guide channel 2c communicates with the above-mentioned pump chamber 1a. At this time, the position of the upper port of the gas guide channel 2c is higher than the inner port of the water injection hole 2b. A sealing member is detachably fixed in the exhaust hole 2a, and the sealing member is used to simultaneously block the exhaust hole 2a and the water injection hole 2b and the outside of the exhaust hole 2a and the pump housing 1.

[0029] During use, remove the sealing member, and pour water into the pump chamber 1a through the water injection hole 2b; the air in the pump chamber 1a enters the exhaust hole 2a through the gas guide channel 2c and is finally discharged upward through the upper port of the exhaust hole 2a.

[0030] This application only needs to install one sealing member to simultaneously block the exhaust hole 2a and the water injection hole 2b and the outside of the exhaust hole 2a and the pump housing 1, so as to effectively reduce the assembly steps and has the advantages of convenient and easy use.

[0031] In this embodiment,

[0032] As Figure 2 shown, the sealing member is a rubber plug 3 in the shape of a rod, and the shape and size of the rubber plug 3 match the exhaust hole 2a. The rubber plug 3 is inserted into the exhaust hole 2a. At this time, the side wall of the rubber plug 3 is in close contact with the inner wall of the exhaust hole 2a to form a seal, and the upper end of the rubber plug 3 extends out of the exhaust hole 2a. In this way, the sealing can be achieved by inserting and pulling out the rubber plug 3, which has the advantages of simple structure and convenient use. Further explanation, the lower end of the rubber plug 3 extends out of the exhaust hole 2a to effectively extend the sealing path formed between the rubber plug 3 and the exhaust hole 2a, ensuring the stable operation of the centrifugal pump. A tapered guiding surface 3a is formed on the outer side wall of the lower end of the rubber plug 3, and the diameter of the guiding surface 3a gradually decreases from top to bottom, and the guiding surface 3a extends to the bottom surface of the rubber plug 3. The guiding surface 3a is provided for guiding the insertion of the rubber plug 3, further facilitating the insertion and extraction.

[0033] Furthermore, a limiting seat 3b is formed on the outer wall of the upper end of the rubber plug 3. The limiting seat 3b is in the shape of a ring coaxial with the rubber plug 3, and the limiting seat 3b presses on the top surface of the bump 2. The setting of the limiting seat 3b is used for limiting the insertion of the rubber plug 3, so that the rubber plug 3 can be installed in place at one time for convenient assembly, and can also extend the sealing performance formed between the rubber plug 3 and the pump housing 1, further ensuring the stable operation of the centrifugal pump.

[0034] As Figure 3As shown, the structure of the air guide channel 2c is as follows: The air guide channel 2c includes an upper air hole 2c1 arranged horizontally and a lower air hole 2c2 arranged vertically, and the upper air hole 2c1 is above the lower air hole 2c2. Among them, both ends of the lower air hole 2c2 are respectively communicated with the upper air hole 2c1 and the pump chamber 1a; one end of the upper air hole 2c1 is closed and the other end is communicated with the exhaust hole 2a. With the above design, it is convenient for the design and processing of the air guide channel 2c.

[0035] Embodiment 2

[0036] The structure and principle of this Embodiment 2 are basically the same as those of Embodiment 1. The difference is that: the plugging member is a plug column screwed in the exhaust hole 2a, and the upper end of the plug column extends out of the exhaust hole 2a; two annular grooves are formed on the outer wall of the plug column, and sealing rings are arranged in both annular grooves. The outer side wall of the sealing ring is in contact with the inner side wall of the exhaust hole 2a for sealing, and the upper port of the air guide channel 2c and the inner port of the water injection hole 2b are both between the two sealing rings.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. Centrifugal water pump filling structure, including a pump casing (1) with a pump chamber (1a), characterized in that, A bump (2) is formed on the top of the pump housing (1). An exhaust hole (2a) vertically penetrates through the top wall of the bump (2), and the lower end of the exhaust hole (2a) communicates with the above-mentioned pump chamber (1a). A water injection hole (2b) horizontally penetrates through one side of the bump (2), and the inner end of the water injection hole (2b) extends to the lower end hole wall of the exhaust hole (2a), and the water injection hole (2b) communicates with the exhaust hole (2a); A gas guiding channel (2c) is also provided in the bump (2). The upper end of the gas guiding channel (2c) communicates with the upper end of the exhaust hole (2a), and the lower end of the gas guiding channel (2c) communicates with the above-mentioned pump chamber (1a); A plugging member is detachably fixed in the exhaust hole (2a), and the plugging member is used to simultaneously block the exhaust hole (2a) and the water injection hole (2b) and the exhaust hole (2a) from the outside of the pump housing (1).

2. The water injection structure of the centrifugal water pump according to claim 1, characterized in that, The above-mentioned plugging member is a rubber plug (3) in the shape of a rod. The shape and size of the rubber plug (3) match those of the exhaust hole (2a). The rubber plug (3) is inserted into the exhaust hole (2a), and the upper end of the rubber plug (3) extends out of the exhaust hole (2a).

3. The water injection structure of the centrifugal water pump according to claim 2, characterized in that, The lower end of the rubber plug (3) extends out of the exhaust hole (2a).

4. The water injection structure of the centrifugal water pump according to claim 3, characterized in that, A tapered guiding surface (3a) is formed on the outer side wall of the lower end of the rubber plug (3). The diameter of the guiding surface (3a) gradually decreases from top to bottom, and the guiding surface (3a) extends to the bottom surface of the rubber plug (3).

5. The centrifugal water pump water injection structure according to claim 2 or 3 or 4, characterized in that, A limiting seat (3b) is formed on the outer wall of the upper end of the rubber plug (3). The limiting seat (3b) is in the shape of a ring coaxial with the rubber plug (3), and the limiting seat (3b) presses on the top surface of the bump (2).

6. The water injection structure of the centrifugal water pump according to claim 1, characterized in that, The plugging member is a plug post screwed into the exhaust hole (2a), and the upper end of the plug post extends out of the exhaust hole (2a); Two annular grooves are provided on the outer wall of the plug post, and sealing rings are provided in both annular grooves. The outer side wall of the sealing ring contacts and seals with the inner side wall of the exhaust hole (2a), and the upper port of the gas guiding channel (2c) and the inner port of the water injection hole (2b) are both located between the two sealing rings.

7. The water injection structure of the centrifugal water pump according to claim 1, characterized in that, The gas guiding channel (2c) includes a horizontally arranged upper air hole (2c1) and a vertically arranged lower air hole (2c2). The two ends of the lower air hole (2c2) communicate with the upper air hole (2c1) and the pump chamber (1a) respectively. One end of the upper air hole (2c1) is closed and the other end communicates with the above-mentioned exhaust hole (2a).

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