Adjusting structure for liquid outlet of centrifugal pump

Abstract

The utility model discloses a centrifugal pump liquid outlet adjusting structure, and belongs to the field of centrifugal pumps, the centrifugal pump liquid outlet adjusting structure comprises a base and a valve body, the valve body is fixedly connected above the base, one end of the valve body is provided with a water outlet pipe, the water outlet pipe is of a square structure, and the interior of the water outlet pipe is slidably connected with a movable frame. After the valve body stops working, if water in the water outlet pipe flows back and the back flow impacts the baffle, the lower portion of the baffle is tightly attached to the abutting block, the abutting block prevents the baffle from rotating, liquid is effectively prevented from flowing back to the centrifugal pump, the internal structure is protected, the service life of key components is prolonged, and the equipment fault probability is reduced; when the bearing range of the baffle and the abutting block is exceeded, the baffle pushes the moving frame to slide in the water outlet pipe, blocking of the pressure relief pipe is relieved, backflow water is discharged out of the pressure relief pipe, the overhigh pressure in the water outlet pipe is reduced, the serious problems of pipeline breakage, joint leakage and the like are solved, and safe operation of the centrifugal pump is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pumps, and more specifically, to a centrifugal pump outlet adjustment structure. Background Technology

[0002] Centrifugal pumps are fluid transport devices widely used in many fields such as industrial production, urban water supply, and agricultural irrigation.

[0003] Chinese Patent Announcement No. CN215805203U discloses a centrifugal pump, including a body. A water inlet pipe is fixedly connected to one side of the body. A movable baffle is fixedly connected to one end of the water inlet pipe. A movable spring is movably connected to one side of the movable baffle. A fixed baffle is movably connected to one end of the movable spring. A movable rod is fixedly connected to one side of the fixed baffle. A movable button is fixedly connected to one end of the movable rod. A fixed locking hole is movably connected to one end of the movable rod. A filter screen is fixedly connected to one side of the fixed locking hole.

[0004] However, in the aforementioned patent, when the valve body of the centrifugal pump stops working, water backflow is very likely to occur in the outlet pipe. Due to the lack of an effective anti-backflow mechanism, once the liquid flows back, the backflowing liquid will impact the internal structure of the centrifugal pump without any obstruction, especially key components such as the impeller and pump shaft. Frequent backflow impacts will lead to increased impeller wear, blade deformation or even breakage, and the pump shaft may also bend or develop fatigue cracks due to the additional reverse torque. This not only seriously affects the service life of the centrifugal pump and increases the maintenance cost and replacement frequency of the equipment, but may also lead to frequent equipment failures, thereby affecting the continuity of the entire production process and causing huge economic losses.

[0005] Therefore, a centrifugal pump outlet adjustment structure is proposed to address the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a centrifugal pump outlet adjustment structure.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A centrifugal pump outlet adjustment structure includes a base and a valve body. The valve body is fixedly connected to the top of the base. One end of the valve body is provided with a water outlet pipe. The water outlet pipe has a square structure. A movable frame is slidably connected inside the water outlet pipe. A baffle is rotatably connected inside the movable frame. An abutment block is fixedly connected to the bottom of the movable frame. One side of the baffle is in contact with the abutment block.

[0009] Furthermore, two tension springs are fixedly connected to one side of the baffle, and the ends of the two tension springs away from the baffle are fixedly connected to the top of the movable frame.

[0010] Furthermore, an installation groove is provided inside the water outlet pipe, and a spring is fixedly connected to the top of the movable frame.

[0011] Furthermore, the spring is located inside the mounting groove, and one end of the spring is fixedly connected to the inner wall of the water outlet pipe.

[0012] Furthermore, a pressure relief pipe is fixedly connected to the lower part of the water outlet pipe, and the pressure relief pipe is located directly below the movable frame.

[0013] Furthermore, a motor is fixedly connected to the top of the base.

[0014] Furthermore, the valve body is internally rotatably connected with blades.

[0015] Furthermore, the output end of the motor is fixedly connected to the middle part of the valve body and the blade, and a water inlet pipe is fixedly connected to one side of the valve body. Beneficial effects

[0016] (1) In this scheme, if water flows back into the outlet pipe after the valve body stops working, it will impact the baffle. Because the bottom of the baffle is tightly fitted with the contact block, the contact block prevents the baffle from rotating, effectively preventing liquid from flowing back into the centrifugal pump, protecting the internal structure, extending the service life of key components, and reducing the probability of equipment failure.

[0017] (2) In this scheme, under extreme conditions, if the backflow impact force is too large and exceeds the bearing capacity of the baffle and the contact block, the baffle pushes the moving frame to slide in the outlet pipe, releases the blockage of the pressure relief pipe, and the backflow water is discharged from the pressure relief pipe, reducing the excessive pressure in the outlet pipe, avoiding serious problems such as pipe rupture and leakage at the connection, and ensuring the safe operation of the centrifugal pump.

[0018] (3) In this scheme, when the centrifugal pump is working, the high-speed water flow in the valve body impacts the baffle and causes it to rotate. At this time, the upper part of the moving frame is located at the edge of the mounting groove. The edge of the mounting groove restricts the movement of the moving frame. The moving frame tightly seals the pressure relief pipe to ensure that the water flows out normally from the outlet pipe, avoids liquid leakage from the pressure relief pipe, and maintains the efficient operation of the centrifugal pump and stable liquid delivery. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the water outlet pipe in this utility model;

[0022] Figure 3 This is a cross-sectional view of a portion of the structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the pressure relief pipe section in this utility model;

[0024] Figure 5 This is a schematic diagram of the movable frame part in this utility model.

[0025] Explanation of the labels in the diagram:

[0026] 1. Base; 11. Valve body; 12. Blade; 13. Motor; 14. Inlet pipe; 15. Outlet pipe; 16. Moving frame; 17. Spring; 18. Mounting groove; 19. Baffle; 2. Tension spring; 21. Abutment block; 22. Pressure relief pipe. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The present invention will be further described below with reference to the embodiments. Example 1

[0029] Please see Figure 1-5 A centrifugal pump outlet adjustment structure includes a base 1 and a valve body 11. The valve body 11 is fixedly connected to the top of the base 1. One end of the valve body 11 is provided with an outlet pipe 15. The outlet pipe 15 has a square structure. A movable frame 16 is slidably connected inside the outlet pipe 15. A baffle 19 is rotatably connected inside the movable frame 16. An abutment block 21 is fixedly connected to the bottom of the movable frame 16. One side of the baffle 19 is in contact with the abutment block 21. Two tension springs 2 are fixedly connected to one side of the baffle 19. The ends of the two tension springs away from the baffle 19 are fixedly connected to the top of the movable frame 16. An installation groove 18 is opened inside the outlet pipe 15. A spring 17 is fixedly connected to the top of the movable frame 16. The spring 17 is located inside the installation groove 18. One end of the spring 17 is fixedly connected to the inner wall of the outlet pipe 15. A pressure relief pipe 22 is fixedly connected to the bottom of the outlet pipe 15. The pressure relief pipe 22 is located directly below the movable frame 16.

[0030] In this embodiment, during the operation of the centrifugal pump, when the valve body 11 is in working condition, a continuous flow of water flows at high speed inside it. As this water flows towards the outlet pipe 15, it directly impacts the baffle 19. Since the baffle 19 and the movable frame 16 are rotatably connected, under the strong impact of the water flow, the baffle 19 rotates around its connecting axis with the movable frame 16. At this time, the upper part of the movable frame 16 is precisely at the edge of the mounting groove 18. The edge of the mounting groove 18 effectively limits the movable frame 16. Although the impact force of the water flow is large, due to this limiting structure, the impact force of the water flow cannot overcome the constraint of the edge of the mounting groove 18 on the movable frame 16, thus preventing the movable frame 16 from moving. Simultaneously, the movable frame 16 at this position precisely seals the pressure relief pipe 22. This sealing effect ensures that when the centrifugal pump is operating normally, the water flow can exit from the outlet pipe 15 along a predetermined path, preventing liquid leakage from the pressure relief pipe 22, ensuring the efficient operation of the centrifugal pump and the stability of liquid delivery.

[0031] When valve body 11 stops working, the water flow in outlet pipe 15 changes, and backflow may occur. If backflow occurs, the counterflowing water will quickly impact baffle 19. It is worth noting that the bottom of baffle 19 is tightly fitted with contact block 21, which is made of a sturdy and durable material and fits perfectly with baffle 19. In this tight fit, when counterflowing water impacts baffle 19, the contact block 21 prevents baffle 19 from rotating around its connecting axis with the moving frame 16, effectively preventing further backflow. This protects the internal structure of the centrifugal pump from the impact and damage of the backflowing liquid, extends the service life of key components of the centrifugal pump, and reduces the probability of equipment failure due to backflow problems.

[0032] However, in some extreme cases, if the backflow water has an abnormally strong impact force that exceeds the tolerance of the baffle 19 and the contact block 21, the baffle 19 will cause the moving frame 16 to slide inside the outlet pipe 15 under the force of the strong water flow. The inner wall of the outlet pipe 15 is finely processed, with a smooth surface and high dimensional accuracy, which can ensure the smoothness and stability of the moving frame 16 during the sliding process. As the moving frame 16 slides, it gradually releases the blockage on the pressure relief pipe 22. At this time, the backflow water finds a new path to release and can flow out quickly from below the pressure relief pipe 22. This process effectively reduces the excessive pressure inside the outlet pipe 15 caused by backflow, avoiding serious problems such as pipe rupture and leakage at the connection that may be caused by excessive pressure, and providing a reliable protection mechanism for the safe operation of the centrifugal pump. Example 2

[0033] Please see Figure 1-5A centrifugal pump outlet adjustment structure is provided, wherein a motor 13 is fixedly connected above the base 1, a blade 12 is rotatably connected inside the valve body 11, the output end of the motor 13 is fixedly connected to the middle part passing through the valve body 11 and the blade 12, and an inlet pipe 14 is fixedly connected to one side of the valve body 11.

[0034] In this embodiment, the motor 13, securely connected above the base 1, provides a stable power foundation for the continuous operation of the centrifugal pump thanks to its compact and robust installation. The motor 13 uses a high-permeability silicon steel core and low-resistance enameled wire windings, effectively reducing its own energy loss. Its output end is directly connected to the middle of the blade 12 via a high-precision coupling. This not only ensures the accuracy of power transmission but also greatly reduces additional vibration and wear caused by connection deviations. When the motor 13 is running, it can quickly respond to external control commands, achieving precise speed control and flexibly adapting to different liquid delivery requirements, significantly improving the operating efficiency and controllability of the centrifugal pump.

[0035] The blades 12, rotatably connected within the valve body 11, adopt a tortuous shape conforming to fluid dynamics. Formed using precision casting, they have a smooth surface and extremely high precision. Driven by the motor 13, the blades 12 rotate at high speed. Their special curved surface design guides the liquid to flow in a near-laminar state, effectively reducing internal turbulence and energy loss. The blades 12 are made of high-strength, corrosion-resistant alloy material, maintaining good mechanical properties and surface finish even with various corrosive or impurity-containing liquids, ensuring stable operation over long periods and extending the overall service life of the centrifugal pump.

[0036] The inlet pipe 14, which is fixedly connected to one side of the valve body 11, has a diameter determined by rigorous hydraulic calculations to ensure that it can meet the maximum flow requirements of the centrifugal pump under different operating conditions and avoid cavitation caused by insufficient liquid intake. The connection between the inlet pipe 14 and the valve body 11 adopts a special sealing structure, which can not only prevent liquid leakage, but also optimize the flow direction of liquid entering the valve body 11, reduce liquid impact and energy loss. The inlet pipe 14 is made of high-quality pipe material that is pressure-resistant and wear-resistant, and can withstand high pressure and liquid scouring during the transportation process, ensuring the stability and continuity of liquid input and providing reliable material support for the efficient operation of the centrifugal pump.

[0037] Working Principle: During the operation of the centrifugal pump, when the valve body 11 is in working condition, a continuous flow of water flows at high speed inside it. As this water flows towards the outlet pipe 15, it directly impacts the baffle 19. Since the baffle 19 and the moving frame 16 are connected by a rotating mechanism, under the strong impact of the water flow, the baffle 19 rotates around its connecting axis with the moving frame 16. At this time, the top of the moving frame 16 is precisely at the edge of the mounting groove 18. The edge of the mounting groove 18 effectively limits the movement of the moving frame 16. Although the impact force of the water flow is large, due to this limiting structure, the impact force of the water flow cannot overcome the constraint of the edge of the mounting groove 18 on the moving frame 16, thus preventing the moving frame 16 from moving. Simultaneously, the moving frame 16 at this position precisely seals the pressure relief pipe 22. This sealing effect ensures that when the centrifugal pump is operating normally, the water flow can exit from the outlet pipe 15 along a predetermined path, preventing liquid leakage from the pressure relief pipe 22, ensuring the efficient operation of the centrifugal pump and the stability of liquid delivery.

[0038] When valve body 11 stops working, the water flow in outlet pipe 15 changes, and backflow may occur. If backflow occurs, the counterflowing water will quickly impact baffle 19. It is worth noting that the bottom of baffle 19 is tightly fitted with contact block 21, which is made of a sturdy and durable material and fits perfectly with baffle 19. In this tight fit, when counterflowing water impacts baffle 19, the contact block 21 prevents baffle 19 from rotating around its connecting axis with the moving frame 16, effectively preventing further backflow. This protects the internal structure of the centrifugal pump from the impact and damage of the backflowing liquid, extends the service life of key components of the centrifugal pump, and reduces the probability of equipment failure due to backflow problems.

[0039] However, in some extreme cases, if the backflow water has an abnormally strong impact force that exceeds the tolerance of the baffle 19 and the contact block 21, the baffle 19 will cause the moving frame 16 to slide inside the outlet pipe 15 under the force of the strong water flow. The inner wall of the outlet pipe 15 is finely processed, with a smooth surface and high dimensional accuracy, which can ensure the smoothness and stability of the moving frame 16 during the sliding process. As the moving frame 16 slides, it gradually releases the blockage on the pressure relief pipe 22. At this time, the backflow water finds a new path to release and can flow out quickly from below the pressure relief pipe 22. This process effectively reduces the excessive pressure inside the outlet pipe 15 caused by backflow, avoiding serious problems such as pipe rupture and leakage at the connection that may be caused by excessive pressure, and providing a reliable protection mechanism for the safe operation of the centrifugal pump.

[0040] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A centrifugal pump outlet adjustment structure, comprising a base (1) and a valve body (11), characterized in that: The valve body (11) is fixedly connected above the base (1). One end of the valve body (11) is provided with a water outlet pipe (15). The water outlet pipe (15) has a square structure. A movable frame (16) is slidably connected inside the water outlet pipe (15). A baffle (19) is rotatably connected inside the movable frame (16). A contact block (21) is fixedly connected below the movable frame (16). One side of the baffle (19) is in contact with the contact block (21).

2. The centrifugal pump outlet adjustment structure according to claim 1, characterized in that: Two tension springs (2) are fixedly connected to one side of the baffle (19), and the ends of the two tension springs (2) away from the baffle (19) are fixedly connected to the top of the movable frame (16).

3. The centrifugal pump outlet adjustment structure according to claim 2, characterized in that: The water outlet pipe (15) has an installation groove (18) inside, and a spring (17) is fixedly connected to the top of the movable frame (16).

4. The centrifugal pump outlet adjustment structure according to claim 3, characterized in that: The spring (17) is located inside the mounting groove (18), and one end of the spring (17) is fixedly connected to the inner wall of the water outlet pipe (15).

5. The centrifugal pump outlet adjustment structure according to claim 4, characterized in that: A pressure relief pipe (22) is fixedly connected to the lower part of the water outlet pipe (15), and the pressure relief pipe (22) is located directly below the movable frame (16).

6. The centrifugal pump outlet adjustment structure according to claim 1, characterized in that: A motor (13) is fixedly connected to the top of the base (1).

7. The centrifugal pump outlet adjustment structure according to claim 6, characterized in that: The valve body (11) is internally rotatably connected to a blade (12).

8. The centrifugal pump outlet adjustment structure according to claim 7, characterized in that: The output end of the motor (13) is fixedly connected to the middle part of the valve body (11) and the blade (12), and a water inlet pipe (14) is fixedly connected to one side of the valve body (11).

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