Water injection structure of centrifugal pump

Abstract

This utility model relates to a water injection structure for a centrifugal pump, belonging to the field of centrifugal pump technology, and solves the technical problem that impurities easily enter the inlet pipe when used in open environments. The centrifugal pump water injection structure includes a pump body, an inlet pipe, and a baffle. The pump body is used to transport liquid; the inlet pipe is installed on the pump body and connected to it; the baffle is rotatably installed inside the inlet pipe. When the pump body is in a stopped state, the baffle abuts against the inner wall of the inlet pipe, closing the inlet pipe. When liquid is added to the pump body through the inlet pipe, the liquid pushes the baffle to rotate, thus connecting the inlet pipe to the pump body. Therefore, this centrifugal pump water injection structure, through the baffle, prevents other impurities from entering the pump body, extending the service life of the pump body.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal pump technology, and specifically relates to a centrifugal pump water injection structure. Background Technology

[0002] Centrifugal pumps, as fluid transport devices, mainly utilize centrifugal force to convert mechanical energy into the kinetic energy of the liquid through the high-speed rotation of the impeller, thereby achieving liquid transport.

[0003] During the normal operation of a centrifugal pump, the pump body needs to be filled with the liquid to be pumped before the pump body starts working. However, in open or insufficiently protected environments, various impurities, such as mud, sand, leaves, and debris, may enter the inlet pipe. Once these impurities enter the pump body, they will not only cause wear to the impeller, affecting the pump's efficiency and lifespan, but may also cause blockage of the pump body, and in severe cases, even damage to the pump body or failure to work properly. Utility Model Content

[0004] This invention provides a centrifugal pump water injection structure to solve the technical problem that impurities can easily enter the inlet pipe when used in open environments.

[0005] This utility model is achieved through the following technical solution: a centrifugal pump water injection structure, including a pump body, an inlet pipe, and a baffle, wherein the pump body is used to transport liquid; the inlet pipe is installed on the pump body and connected to the pump body; the baffle is rotatably installed inside the inlet pipe. When the pump body is in a stopped state, the baffle abuts against the inner wall of the inlet pipe, and the baffle closes the inlet pipe. When liquid is added to the pump body through the inlet pipe, the liquid pushes the baffle to rotate, so that the inlet pipe is connected to the pump body.

[0006] Optionally, it also includes a stop block, which is installed on the inner wall of the inlet pipe, and the baffle abuts against the stop block to limit the baffle and close the inlet pipe.

[0007] Optionally, it also includes a counterweight, which is installed on one side of the baffle. The counterweight drives the baffle to reset under the action of gravity, so that the baffle closes the liquid inlet pipe.

[0008] Optionally, when the baffle closes the inlet pipe, the distance between the end of the baffle away from the counterweight and the pump body is less than the distance between the end of the baffle close to the counterweight.

[0009] Optionally, at least two stops are provided, one of which is located on the side of the inlet pipe away from the pump body and on the side of the inlet pipe away from the counterweight, and the other stop is located above the rotating shaft of the baffle inside the inlet pipe.

[0010] Optionally, there are three blocks in total. Any two blocks are located on opposite sides of the inlet pipe to limit the baffle when the baffle closes the inlet pipe. The other block is located above the baffle to limit the baffle when the inlet pipe injects liquid into the pump body.

[0011] Optionally, the baffle has abutment portions at both ends, and the thickness of the abutment portions gradually increases from one end of the baffle near the liquid inlet pipe to the other end.

[0012] Optionally, a sealing gasket is also included, which is installed on the side of the abutment that abuts against the stop.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] The present invention provides a centrifugal pump water injection structure including a pump body, an inlet pipe, and a baffle. The pump body is used to transport liquid. The inlet pipe is installed on the pump body and connected to the pump body. The baffle is rotatably installed inside the inlet pipe. When the pump body is in a stopped state, the baffle abuts against the inner wall of the inlet pipe and closes the inlet pipe. When liquid is added to the pump body through the inlet pipe, the liquid pushes the baffle to rotate so that the inlet pipe is connected to the pump body.

[0015] With the above structure, the centrifugal pump water injection structure provided by this utility model allows the baffle to rotate and open the inlet pipe when the pump body needs to transport liquid, connecting the inlet pipe to the pump body. Liquid is then added into the pump body through the inlet pipe, filling it with liquid. The pump body is then started to pump the liquid. After the pump body has finished pumping the liquid, the baffle rotates to close the inlet pipe, preventing other external impurities from entering the pump body. Therefore, this centrifugal pump water injection structure, by preventing other external impurities from entering the pump body through the baffle, extends the service life of the pump body. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a centrifugal pump water injection structure provided by this utility model;

[0018] Figure 2 This is a schematic diagram of the liquid inlet pipe in an embodiment of this utility model;

[0019] Figure 3This is a top view of the inlet pipe in an embodiment of this utility model;

[0020] Figure 4 This is a cross-sectional view of the inlet pipe in an embodiment of this utility model.

[0021] In the picture:

[0022] 1-Pump body; 2-Inlet pipe; 3-Baffle; 4-Block; 5-Counterweight; 6-Sealing gasket. Detailed Implementation

[0023] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0027] This utility model provides a centrifugal pump water injection structure, solving the technical problem that impurities easily enter the inlet pipe when used in open environments. The centrifugal pump water injection structure includes a pump body 1, an inlet pipe 2, and a baffle 3, wherein:

[0028] Pump body 1 is used to transport liquids from one location to another. Pump body 1 is a centrifugal pump. The pump shaft of pump body 1 drives the impeller to rotate at high speed, generating centrifugal force. Under the action of centrifugal force, the liquid is thrown from the center of the impeller to the outer periphery of the impeller, increasing the pressure. Due to the continuous expansion of the flow channel in the pump casing, the flow velocity of the liquid slows down, causing most of the kinetic energy to be converted into pressure energy. The liquid flows into the discharge pipe from the outlet with a higher static pressure. After the liquid in the pump is thrown out, a vacuum is formed at the center of the impeller. Under the action of the pressure difference between atmospheric pressure and the pressure inside the pump, the liquid is drawn into the pump through the pipeline.

[0029] The inlet pipe 2 is installed on the pump body 1 and is connected to the pump body 1. The inlet pipe 2 is used to add liquid into the pump body 1. When the pump body 1 is started, if there is air in the pump body 1, the low pressure generated by the impeller rotation of the pump body 1 is insufficient to draw in liquid due to the low density of air, and therefore the liquid cannot be pumped. Therefore, the pump body 1 must be filled with the liquid to be transported before starting. In order to facilitate the liquid added by the inlet pipe 2 to enter the pump body 1, the inlet pipe 2 is usually located at the top of the pump body 1, so as to reduce the insufficient liquid added, which would cause the impeller of the pump body 1 to be unable to draw in liquid. The inlet pipe 2 is equipped with a valve to close when the pump body 1 is pumping liquid, so as to seal the inlet pipe 2 and prevent external air from entering the pump body 1 through the inlet pipe 2 and affecting the pumping effect.

[0030] Baffle 3 is rotatably installed inside the inlet pipe 2. Baffle 3 is used to open and close the inlet pipe 2. When the pump body 1 is in a stopped state, the outer wall of the baffle 3 abuts against the inner wall of the inlet pipe 2, thereby closing the inlet pipe 2. This prevents other impurities from entering the pump body 1 through the inlet pipe 2. Before use, the impurities on the baffle 3 can be cleaned. When liquid is added to the pump body 1 through the inlet pipe 2 to facilitate pumping, the liquid added to the pump body 1 pushes the baffle 3 to rotate, causing the baffle 3 to open the inlet pipe 2, thus connecting the inlet pipe 2 with the pump body 1. When adding water, the gravity of the water directly causes the baffle 3 to open the inlet pipe 2, reducing the step of opening the baffle 3 separately, making it convenient to use. The inlet pipe 2 can be round, square, or other shapes that allow the baffle 3 to rotate and close the inlet pipe 2.

[0031] With the above structure, the centrifugal pump water injection structure provided by this utility model allows the baffle 3 to rotate and open the inlet pipe 2 when the pump body 1 needs to transport liquid. This connects the inlet pipe 2 to the pump body 1, allowing liquid to be added into the pump body 1 through the inlet pipe 2 until the pump body 1 is full. Then, the pump body 1 is started to pump the liquid. After the pump body 1 has pumped the liquid, the baffle 3 rotates to close the inlet pipe 2, preventing other external impurities from entering the pump body 1. Therefore, this centrifugal pump water injection structure, by preventing other external impurities from entering the pump body 1 through the baffle 3, extends the service life of the pump body 1. Furthermore, during water injection, the gravity of the injected water can directly push the baffle 3 to open the inlet pipe 2, making it convenient to use.

[0032] An optional implementation of this embodiment is as follows: In order to limit the baffle 3, the centrifugal pump water injection structure also includes a baffle 4. The baffle 4 is installed on the inner wall of the liquid inlet pipe 2. When the baffle 3 abuts against the baffle 4, the baffle 4 prevents the baffle 3 from continuing to rotate. When the baffle 3 abuts against the baffle 4, the baffle 3 closes the water inlet. When liquid is added into the pump body 1 through the liquid inlet pipe 2, the liquid pushes the baffle 3 to rotate under the action of gravity, causing the baffle 3 to rotate away from the baffle 4, thereby separating the baffle 3 from the baffle 4. When the baffle 3 is parallel to the axial direction of the water inlet pipe, the baffle 3 opens the liquid inlet formed by the water inlet pipe to the maximum, so as to accommodate more liquid into the pump body 1.

[0033] An optional implementation of this embodiment is as follows: To facilitate the timely reset and closure of the inlet pipe 2 after liquid injection into the pump body 1 via the inlet pipe 2, the centrifugal pump water injection structure further includes a counterweight 5. The counterweight 5 is installed on one side of the baffle 3. Under the action of gravity, the counterweight 5 drives the baffle 3 to rotate, causing the baffle 3 to reset. The baffle 3 then abuts against the stop block 4, thereby closing the inlet pipe 2. It is worth noting that when liquid is injected into the pump body 1, the force of the liquid pushing the baffle 3 to rotate under the action of gravity is greater than the weight of the counterweight 5. This allows the liquid to push the baffle 3 to rotate and open the inlet pipe 2 when liquid is injected into the pump body 1. After the liquid injection is completed, the baffle 3 can reset and close the inlet pipe 2. This allows the baffle 3 to both close the inlet pipe 2 under the action of the counterweight 5 after liquid is injected into the pump body 1 to prevent other impurities from entering the inlet pipe 2, and also open the inlet pipe 2 by the gravity of the liquid when liquid is injected into the pump body 1. This makes it convenient to use.

[0034] An optional implementation of this embodiment is as follows: When the baffle 3 closes the inlet pipe 2, the distance between the end of the baffle 3 away from the counterweight 5 and the pump body 1 is less than the distance between the end of the baffle 3 and the end of the counterweight 5. When liquid is injected into the pump body 1 through the inlet pipe 2, the rotation direction of the baffle 3 is opposite to the rotation direction of the counterweight 5 that drives the baffle 3 to reset. The fact that the distance between the end of the baffle 3 away from the counterweight 5 and the pump body 1 is less than the distance between the end of the baffle 3 and the end of the counterweight 5 allows the counterweight 5 to drive the baffle 3 to reset after liquid is injected into the inlet pipe 2. That is, when the distance between the end of the baffle 3 away from the counterweight 5 and the pump body 1 is greater than the distance between the end of the baffle 3 and the end of the counterweight 5, the counterweight 5 will drive the baffle 3 to rotate under the action of gravity, so that the baffle 3 is in or close to a vertical state, and cannot close the inlet pipe 2.

[0035] An optional implementation of this embodiment is as follows: At least two stop blocks 4 are provided. One stop block 4 is located on the side of the inlet pipe 2 away from the pump body 1 and on the side of the inlet pipe 2 away from the counterweight 5. This stop block 4 is used to limit the baffle 3 when it resets and closes the inlet pipe 2, so that the baffle 3 can close the inlet pipe 2 and prevent the baffle 3 from continuing to rotate and causing it to open the inlet pipe 2. The other stop block 4 is located above the rotating shaft of the baffle 3 inside the inlet pipe 2. This stop block 4 is used to limit the baffle 3 when it opens the inlet pipe 2, thereby reducing the number of baffles. The rotation of the baffle 3 causes the counterweight 5 to move to the side of the inlet pipe 2 of the baffle 3 that is close to the other baffle 4. As a result, after the liquid is injected into the pump body 1 through the inlet pipe 2, the baffle 3 rotates in the opposite direction under the gravity of the counterweight 5, thereby causing the baffle 3 to lose its function of closing the inlet pipe 2. More preferably, baffles 4 are provided at both ends of the baffle 3. The two baffles 4 are located on both sides of the baffle 3. When the baffle 3 closes the inlet pipe 2, the two ends of the baffle 3 abut against the two baffles 4 respectively, so that the force on the two ends of the baffle 3 is more even.

[0036] An optional implementation of this embodiment is as follows: There are three blocks 4 in total. Any two blocks 4 are located on opposite sides of the inlet pipe 2 and at both ends of the baffle 3. The two blocks 4 are located on both sides of the baffle 3. When the baffle 3 closes the inlet pipe 2, the baffle 3 and the blocks 4 abut against each other, thereby limiting the baffle 3. At the same time, the baffle 3 and the blocks 4 abut against each other, reducing the gap between the baffle 3 and the inlet pipe 2, thereby better closing the inlet pipe 2. The other block 4 is located above the baffle 3 to limit the baffle 3 when the inlet pipe 2 injects liquid into the pump body 1.

[0037] An optional implementation of this embodiment is as follows: the baffle 3 has abutment portions at both ends, which are used to abut against the stop block 4 to better close the liquid inlet pipe 2. The thickness of the abutment portion gradually increases from one end of the baffle 3 near the liquid inlet pipe 2 to the other end. The stop block 4 is adapted to the abutment portion to better abut against the stop block 4. Optionally, the abutment portion can be a slope, and one side of the stop block 4 is also a slope. When the abutment portion abuts against the stop block 4, the slope increases the contact area between the stop block 4 and the baffle 3, thereby better closing the liquid inlet pipe 2. The abutment portion can also be an arc surface. The side of the stop block 4 near the baffle 3 can be a slope or adapted to the abutment portion. The slope makes it easier for the abutment portion to abut against the abutment portion. The adaptation of the stop block 4 to the abutment portion makes the contact area larger, thereby better closing the liquid inlet pipe 2.

[0038] An optional implementation of this embodiment is as follows: In order to better close the inlet pipe 2, the centrifugal pump water injection structure also includes a sealing gasket 6. The sealing gasket 6 is installed on the side of the abutment part that abuts against the baffle 4. When the baffle 3 closes the inlet pipe 2, the sealing gasket 6 abuts against the baffle 4. The sealing gasket 6 is a structural component made of rubber, silicone, etc. The sealing gasket 6 deforms to better fit the baffle 4, reducing the gap between the baffle 4 and the baffle 3, thereby better closing the inlet pipe 2.

[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A centrifugal pump water injection structure, characterized by, include: Pump body, used to transport liquids; An inlet pipe is installed on the pump body and connected to the pump body; A baffle is rotatably installed inside the inlet pipe. When the pump body is in a stopped state, the baffle abuts against the inner wall of the inlet pipe, and the baffle closes the inlet pipe. When liquid is added to the pump body through the inlet pipe, the liquid pushes the baffle to rotate, so that the inlet pipe is connected to the pump body.

2. A water injection structure for a centrifugal pump according to claim 1, wherein Also includes: A stop block is installed on the inner wall of the inlet pipe, and the baffle abuts against the stop block to limit the baffle and close the inlet pipe.

3. A centrifugal pump water injection structure according to claim 2, wherein Also includes: A counterweight is installed on one side of the baffle. Under the action of gravity, the counterweight drives the baffle to reset, so that the baffle closes the liquid inlet pipe.

4. A centrifugal pump water injection structure according to claim 3, wherein When the baffle closes the inlet pipe, the distance between the end of the baffle away from the counterweight and the pump body is less than the distance between the end of the baffle close to the counterweight.

5. A centrifugal pump water injection structure according to claim 3, wherein At least two baffles are provided. One baffle is located on the side of the inlet pipe away from the pump body and on the side of the inlet pipe away from the counterweight. The other baffle is located above the rotating shaft of the baffle inside the inlet pipe.

6. A centrifugal pump water injection structure according to claim 5, wherein There are three blocks in total. Any two blocks are located on opposite sides of the inlet pipe to limit the baffle when the inlet pipe is closed. The other block is located above the baffle to limit the baffle when the inlet pipe injects liquid into the pump body.

7. A centrifugal pump water injection structure according to claim 2, wherein The baffle has abutment portions at both ends, and the thickness of the abutment portions gradually increases from the end of the baffle closest to the liquid inlet pipe to the other end.

8. A centrifugal pump water injection structure according to claim 7, wherein Also includes: A sealing gasket is installed on the side of the abutting part that abuts against the stop block.

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