Self-priming pump body

Abstract

The utility model provides a kind of self-priming pump pump body, belong to water pump manufacturing technical field.It solves the problem of the self-priming efficiency of existing pump body is not high.The self-priming pump body includes the body that inside is cavity, the volute chamber has in body, volute chamber is located in the lower portion of body inner cavity and the front end of volute chamber is through to the front of body to form the installation port for motor installation, the rear end of volute chamber is through to the back of body to form water inlet, the top of volute chamber has the communication hole that is curved and makes body inner cavity and volute chamber inner cavity be connected, the top of body has water outlet and irrigation port that are all connected in its inner cavity, the bottom of body has installation hole for reflux valve installation, volute chamber has the reflux hole that makes water inlet and installation hole be connected.The utility model has the advantages of reasonable structure design, high self-priming efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of water pump manufacturing technology, and relates to a self-priming pump, and particularly to a self-priming pump body. Background Technology

[0002] A centrifugal pump that can automatically draw water without pre-filling the suction line is called a self-priming pump. Before starting a self-priming pump, ensure that the pump body is filled with water or that it already contains water. Under the high-speed rotation of the impeller, the water in the pump body mixes with the air drawn from the suction line, forming a gas-liquid mixture that is discharged to the separation chamber. During this process, the air is expelled and the water returns to the impeller inlet through the return valve. This process is repeated until all the air is expelled and the water in the line is drawn back up.

[0003] The pump body is the core component of a self-priming pump, directly affecting its self-priming efficiency. For example, Chinese patent literature discloses a self-priming pump body structure [Application No.: 202121706593.5; Authorization Announcement No.: CN215486625U], which includes a hollow body with an integrally formed partition wall dividing the interior of the body into an inlet chamber and a pump chamber. The pump chamber houses the impeller. The body is divided into an inlet, an outlet, and a filling port. The pump chamber is connected to the inlet chamber and the outlet chamber. The inlet chamber and the pump chamber are arranged side by side in the thickness direction of the pump body. An annular wall is integrally formed in the inlet chamber and extends in a curved shape in the inlet chamber. The annular wall divides the inlet chamber into an inlet chamber and a return chamber. An inlet hole is provided on the partition wall, which connects the inlet chamber and the pump chamber. A diversion chamber is provided between the outlet of the pump chamber and the outlet. The diversion chamber is connected to the return chamber through a flow channel. The return chamber is connected to the pump chamber through a return hole provided in the partition wall.

[0004] The above-mentioned self-priming pump body structure achieves the corresponding function by forming two parallel chambers in the thickness direction of the pump body, which can improve the structural compactness to a certain extent. However, the water inlet is located at the upper part of the body, and the pump chamber is located at the lower part of the pump body. The water inlet enters the water inlet chamber through the through hole, and then enters the water inlet chamber through the water inlet hole, and then enters the diversion chamber and the return chamber. The structural layout is still not reasonable enough, resulting in a long water inlet path, which affects the self-priming efficiency. Moreover, the diversion chamber and the return chamber have small volumes, and the separation speed of air and water is slow, which reduces the self-priming efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a self-priming pump body with a reasonable structural design and high self-priming efficiency.

[0006] The objective of this utility model can be achieved through the following technical solution: A self-priming pump body, comprising a body with an internal cavity, wherein the body has a volute chamber, characterized in that the volute chamber is located in the lower part of the body cavity and the front end of the volute chamber extends to the front of the body to form an installation port for installing a motor, the rear end of the volute chamber extends to the back of the body to form a water inlet, the top of the volute chamber has a curved connecting hole that connects the body cavity and the volute chamber, the top of the body has a water outlet and a water inlet both connected to its internal cavity, the bottom of the body has an installation hole for installing a reflux valve, and the volute chamber has a reflux hole that connects the water inlet and the installation hole.

[0007] In the self-priming pump body described above, the orifice of the connecting hole is flared.

[0008] In the self-priming pump body described above, the body has a baffle located between the outlet and the connecting hole.

[0009] In the self-priming pump body described above, the water outlet is located at the top center, the orifice of the connecting hole is positioned facing the inner end of the water outlet, the baffle is positioned close to the inner end of the water outlet, and the baffle is in the shape of an arc plate with its concave arc surface facing the connecting hole.

[0010] In the self-priming pump body described above, the main body has several reinforcing ribs, and the two ends of each rib are respectively fixed to the inner walls of the front and back sides of the main body.

[0011] In the self-priming pump body described above, the main body, volute, baffle, and reinforcing ribs are an integral structure.

[0012] In the aforementioned self-priming pump body, the upper front of the main body has a connection hole one for installing a temperature sensor and connecting it to the inner cavity of the main body, and the upper front of the main body also has a connection hole two for installing a pressure sensor and connecting it to the inner cavity of the main body.

[0013] In the self-priming pump body described above, the upper front part of the main body has a connection hole three for connecting a pressure tank and communicating with the inner cavity of the main body.

[0014] Compared with existing technologies, this self-priming pump has a compact pump body structure, is easy to manufacture, has good working stability, high self-priming efficiency, and long service life. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the self-priming pump body.

[0016] Figure 2 This is a rear view of the structure of the self-priming pump body.

[0017] Figure 3This is a side view of the structure of the self-priming pump body.

[0018] Figure 4 yes Figure 3 Structural cross-sectional view of section AA in the middle.

[0019] Figure 5 yes Figure 3 Structural cross-sectional view of section BB in the middle.

[0020] Figure 6 This is a longitudinal structural cross-sectional view of the self-priming pump body.

[0021] In the diagram, 1. Body; 2. Volute; 3. Mounting port; 4. Inlet; 5. Connecting hole; 6. Outlet; 7. Filling port; 8. Mounting hole; 9. Return hole; 10. Baffle; 11. Reinforcing rib; 12. Connection hole one; 13. Connection hole two; 14. Connection hole three. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the self-priming pump body includes a body 1 with an internal cavity. The body 1 has a volute 2 inside. The volute 2 is located in the lower part of the inner cavity of the body 1, and the front end of the volute 2 extends to the front of the body 1 to form a mounting port 3 for installing a motor. The rear end of the volute 2 extends to the back of the body 1 to form a water inlet 4. The top of the volute 2 has a curved connecting hole 5 that connects the inner cavity of the body 1 and the inner cavity of the volute 2. The top of the body 1 has a water outlet 6 and a water filling port 7 that are both connected to its inner cavity. The bottom of the body 1 has a mounting hole 8 for installing a return valve. The volute 2 has a return hole 9 that connects the water inlet 4 and the mounting hole 8.

[0024] The volute 2 in the pump body of this self-priming pump is used for impeller installation. The rear end of the volute 2 has a water inlet 4. The water inlet path from the water inlet 4 to the volute 2 is short, which improves the self-priming efficiency. Moreover, the inner cavity of the main body 1 outside the volute 2 integrates the functions of the previous liquid storage chamber, diversion chamber, and return water chamber, eliminating the need for partition walls and ring walls. This makes it easy to manufacture and has a compact structure. The large volume of the inner cavity of the main body 1 outside the volute 2 facilitates the holding of more gas-liquid mixtures and also facilitates the separation of gas-liquid mixtures, thus improving the self-priming efficiency.

[0025] When using this self-priming pump, water is first poured into the main body 1 through the filling port 7. Then, the impeller rotates in the volute 2. The centrifugal force generated by the impeller creates a negative pressure in the volute 2. Air and water in the pipe connected to the inlet port 4 enter the volute 2. The rotation of the impeller mixes the air and water, and the gas-liquid mixture enters the inner cavity of the main body 1 through the connecting hole 5. The air will be discharged from the outlet port 6. The pressure in the inner cavity of the main body 1 is insufficient to push the water to flow out of the outlet port 6. The water in the inner cavity of the main body 1 will re-enter the volute through the return hole 9. This cycle continues until the air in the pipe connected to the inlet port 4 and the main body 1 are exhausted. The inner cavity of the main body 1 is filled with water, and the water is self-primed at the outlet port 6.

[0026] To elaborate further, in this embodiment, the orifice of the connecting hole 5 is flared, which increases the flow rate and improves the self-priming efficiency. The body 1 has a baffle 10 located between the outlet 6 and the connecting hole 5. The baffle 10 blocks the gas-liquid mixture, breaks up the bubbles, accelerates air separation, and improves the self-priming efficiency. In this embodiment, the two ends of the baffle 10 are respectively fixed to the inner walls of the front and back sides of the body 1.

[0027] The outlet 6 is located at the top center, and the opening of the connecting hole 5 is set facing the inner end of the outlet 6. The baffle 10 is set close to the inner end of the outlet 6. The baffle 10 is in the shape of an arc plate, and the concave arc surface of the baffle 10 is set facing the connecting hole 5. This structure is reasonable, with less turbulence, faster flow rate, good blocking effect of the baffle 10, and high self-priming efficiency.

[0028] The main body 1 has several reinforcing ribs 11, and the two ends of each rib are fixed to the inner walls of the front and back sides of the main body 1, respectively. The reinforcing ribs 11 increase the structural strength and extend the service life; in this embodiment, there are two reinforcing ribs 11, and the two reinforcing ribs 11 are located on both sides of the connecting hole 5.

[0029] The main body 1, volute, baffle 10, and reinforcing rib 11 are integrated into a single structure. This self-priming pump has a one-piece molded body, which is convenient to manufacture, has fewer leakage points, effectively avoids leakage, and has good operational stability.

[0030] The upper front of the main body 1 has a connection hole 12 for mounting a temperature sensor and connecting it to the inner cavity of the main body 1, and a connection hole 13 for mounting a pressure sensor and connecting it to the inner cavity of the main body 1. This facilitates installation and allows for easy monitoring and control of the temperature and pressure inside the main body 1 during use.

[0031] The upper front of the main body 1 has a connection hole 3 14 for connecting a pressure tank and communicating with the inner cavity of the main body 1. The connection hole 3 14 facilitates the connection of the pressure tank. During use, the pressure tank plays a role in balancing the water volume and pressure inside the main body 1, so that the pump body of this self-priming pump works stably.

[0032] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A self-priming pump body, comprising a body (1) with an internal cavity, wherein the body (1) has a volute (2), characterized in that, The volute (2) is located in the lower part of the inner cavity of the body (1), and the front end of the volute (2) extends to the front of the body (1) to form an installation port (3) for the motor. The rear end of the volute (2) extends to the back of the body (1) to form a water inlet (4). The top of the volute (2) has a curved connecting hole (5) that connects the inner cavity of the body (1) and the inner cavity of the volute (2). The top of the body (1) has a water outlet (6) and a water inlet (7) that are both connected to its inner cavity. The bottom of the body (1) has an installation hole (8) for the installation of a reflux valve. The volute (2) has a reflux hole (9) that connects the water inlet (4) and the installation hole (8).

2. The self-priming pump body according to claim 1, characterized in that, The opening of the connecting hole (5) is flared.

3. The self-priming pump body according to claim 2, characterized in that, The body (1) has a baffle (10) located between the outlet (6) and the connecting hole (5).

4. The self-priming pump body according to claim 3, characterized in that, The outlet (6) is located at the top center, the opening of the connecting hole (5) is set facing the inner end of the outlet (6), the baffle (10) is set close to the inner end of the outlet (6), the baffle (10) is in the shape of an arc plate and the concave arc surface of the baffle (10) is set facing the connecting hole (5).

5. The self-priming pump body according to claim 4, characterized in that, The main body (1) has several reinforcing ribs (11), and the two ends of each rib are respectively fixed to the inner walls of the front and back sides of the main body (1).

6. The self-priming pump body according to claim 5, characterized in that, The main body (1), volute, baffle (10) and reinforcing rib (11) are an integral structure.

7. The self-priming pump body according to claim 6, characterized in that, The upper front of the body (1) has a connection hole 1 (12) for installing a temperature sensor and connecting it to the inner cavity of the body (1), and the upper front of the body (1) also has a connection hole 2 (13) for installing a pressure sensor and connecting it to the inner cavity of the body (1).

8. The self-priming pump body according to claim 7, characterized in that, The upper front of the body (1) has a connection hole three (14) for connecting a pressure tank and communicating with the inner cavity of the body (1).

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