Flow-adjustable chemical material conveying pump

Abstract

The utility model discloses a flow-adjustable chemical material delivery pump, which belongs to the technical field of delivery pumps and comprises a mounting frame, a driving motor and a pump body are mounted on the mounting frame, and the pump body comprises a shell, an impeller disc, a control component and a plurality of blades. The shell is provided with a liquid inlet pipe arranged in the axial direction and a liquid discharging pipe arranged in the tangential direction. The multiple blades are distributed around the axis of the impeller disc in a circumferential array mode, a flow channel is formed between every two adjacent blades, and the blades are rotationally connected with the impeller disc. The control assembly is located in the control cavity and used for controlling the blades to rotate to change the size of the runner. According to the flow-adjustable chemical material conveying pump, the flow is controlled by adjusting the angle of the blade and changing the size of the flow channel, so that when the flow is reduced, the rotating resistance of the blade is reduced, the load of the driving motor is reduced, and the loss of energy in the transmission process is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of conveying pump technology, and in particular relates to an adjustable flow chemical material conveying pump. Background Technology

[0002] Chemical transfer pumps are indispensable equipment in chemical production processes. They are primarily responsible for transporting various chemical materials from one location to another, ensuring the smooth operation of the production flow. In chemical production, the control of material flow rate is crucial, directly impacting production efficiency and product quality.

[0003] In the existing chemical pump material conveying process, flow rate is usually regulated by setting a regulating valve at the feed inlet. Although this method is simple and easy to implement, it has many drawbacks in practical applications. Specifically, when adjusting the material flow rate by reducing the valve opening, although the flow rate can be reduced, a large pressure drop will also be generated at the valve. This pressure drop will cause some power to be converted into heat energy and lost, thereby increasing the load on the motor and reducing the efficiency of the entire system. In addition, due to the reduction of the valve opening, the fluid will generate additional turbulence and resistance when passing through the valve, further aggravating energy loss. Long-term use of this method for flow rate regulation will not only increase energy consumption costs, but may also cause unnecessary wear and tear on the pump body and its related components, shortening the service life of the equipment.

[0004] Therefore, we propose an adjustable flow rate chemical material transfer pump to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem that when adjusting the material flow rate by adjusting the valve opening in the prior art, a large pressure drop will occur at the valve, resulting in some power being converted into heat energy and lost, which increases the load on the pump body. The invention proposes an adjustable flow rate chemical material conveying pump.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adjustable flow rate chemical material conveying pump includes a mounting frame, on which a drive motor and a pump body are mounted. The pump body includes:

[0008] The outer casing has an axially arranged inlet pipe and a tangentially arranged outlet pipe;

[0009] An impeller is rotatably sealed within a housing. A pump chamber is formed on the side of the impeller near the inlet pipe, and a control chamber is formed on the side of the impeller away from the inlet pipe. The output shaft of the drive motor extends into the housing and is coaxially and fixedly connected to the impeller.

[0010] Multiple blades are arranged in a circular array around the axis of the impeller disk, forming a flow channel between two adjacent blades, and the blades are rotatably connected to the impeller disk;

[0011] The control component, located in the control chamber, is used to control the rotation of the blades to change the size of the flow channel.

[0012] Preferably, the outer casing includes a cover and a cap, which are sealed and fixedly connected. A sealing sleeve is provided on the end face of the cover, and the output shaft of the drive motor passes through the sealing sleeve and is rotatably connected to the sealing sleeve in a sealed manner.

[0013] Preferably, the blades are arc-shaped and are in contact with the surface of the impeller disk.

[0014] Preferably, the impeller disk has a tapered guide column on the side near the inlet pipe.

[0015] Preferably, the control component includes:

[0016] A gear drive structure includes sector gears fixedly mounted on a blade shaft, and multiple sector gears meshing with the same drive ring having external teeth;

[0017] The shaft shift drive structure has an axially movable shaft shift ring, and the outer periphery of the shaft shift ring is provided with multiple locking blocks, which engage with the inner side of the drive ring;

[0018] The guide rotation structure includes a fixed ring fixedly installed on the side wall of the impeller disk. The fixed ring is slidably connected to the drive ring on the same axis. Multiple spiral guide strips are provided on the outer side of the fixed ring. The inner wall of the drive ring is provided with guide grooves that are adapted to the guide strips.

[0019] Preferably, multiple positioning rods are fixedly installed inside the casing, and the multiple positioning rods are slidably connected to the shaft shifting ring. An adjusting rod is rotatably installed on the casing, and the adjusting rod is threadedly connected to the shaft shifting ring.

[0020] Preferably, the card block has a trapezoidal card slot, the inner wall of the drive ring is adapted to the card slot, and a roller is rotatably arranged in the card slot.

[0021] In summary, the technical effects and advantages of this utility model are as follows: This adjustable flow chemical material conveying pump controls the flow rate by adjusting the blade angle and changing the flow channel size. When the flow rate decreases, the blade rotation resistance decreases accordingly, thereby reducing the load on the drive motor, reducing energy loss during transmission, improving the overall efficiency of the pump system, and significantly reducing energy consumption costs with long-term use.

[0022] Adjusting the blade angle can quickly change the pump's operating point, enabling continuous flow regulation. This allows the pump system to adapt rapidly to changes in the production process, improving production flexibility and stability, and meeting the real-time requirements of modern chemical production for flow control. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a cross-sectional structural diagram of the pump body of this utility model;

[0025] Figure 3 This is an exploded structural diagram of the pump body of this utility model;

[0026] Figure 4 This is a schematic diagram of the impeller disk in this utility model;

[0027] Figure 5 for Figure 2 A magnified structural diagram of part A in the middle.

[0028] In the diagram: 1. Mounting bracket; 2. Drive motor; 3. Pump body; 4. Housing; 41. Inlet pipe; 42. Drain pipe; 43. Sealing shell; 44. Shell cover; 5. Impeller disc; 51. Guide column; 6. Blade; 7. Control components; 71. Sector gear; 72. Drive ring; 73. Shaft shifting ring; 74. Locking block; 741. Roller; 75. Fixing ring; 76. Guide bar; 77. Guide groove; 78. Positioning rod; 79. Adjusting rod. Detailed Implementation

[0029] Reference Figure 1-3 An adjustable flow chemical material conveying pump includes a mounting frame 1, on which a drive motor 2 and a pump body 3 are mounted. The pump body 3 includes a housing 4, an impeller disk 5, a control component 7, and multiple blades 6.

[0030] The control component 7 is used to control the rotation of the blade 6 to change the material conveying flow rate.

[0031] In chemical production processes, flow control of materials is crucial. Typically, control valves are installed on the pipelines, and flow is controlled by adjusting the valve opening. However, closing the valve increases pipeline resistance, leading to increased pump head and wasted energy as throttling losses. Furthermore, valve throttling can cause increased fluid turbulence, vibration, and noise, accelerating wear on the valves and pipelines. Another method involves using a variable frequency motor (VFM) to drive the pump and control its output power for flow regulation. However, VFM motors are more expensive than ordinary motors. The adjustment range of VFM speed regulation is limited by the minimum speed of the motor and pump (typically 30%–50% of rated speed). Excessively low speeds can cause a sharp drop in pump efficiency or cavitation. VFM speed regulation requires indirect flow adjustment through changes in motor speed, resulting in a longer response time and susceptibility to motor inertia. This adjustable flow chemical material conveying pump controls the rotation angle of the blades 6 using control component 7. This allows for adjustment of the blades 6 without changing pipeline resistance, minimizing system pressure drop, ensuring smooth pump and pipeline operation, reducing vibration and noise, extending equipment life, and providing a short response time for blade angle adjustment, making it suitable for rapidly changing operating conditions.

[0032] The outer casing 4 has an axially arranged inlet pipe 41 and a tangentially arranged outlet pipe 42. The material is introduced from the inlet pipe 41 and discharged from the outlet pipe 42. The outer casing 4 is volute-shaped, which facilitates the discharge of the material along the outlet pipe 42 during the centrifugation process.

[0033] Reference Figure 1-3 The outer casing 4 includes a cover 43 and a cover 44, which are sealed and fixedly connected. A sealing sleeve is provided on the end face of the cover 43. The output shaft of the drive motor 2 passes through the sealing sleeve and is rotatably connected to the sealing sleeve. The sealing sleeve helps to improve the sealing between the output shaft of the drive motor 2 and the outer casing 4.

[0034] The impeller disk 5 is sealed and rotated inside the housing 4. A pumping chamber is formed on the side of the impeller disk 5 near the inlet pipe 41, and a control chamber is formed on the side of the impeller disk 5 away from the inlet pipe 41. The control component 7 is located in the control chamber. The output shaft of the drive motor 2 extends into the housing 4 and is coaxially and fixedly connected to the impeller disk 5. By rotating the drive motor 2, the impeller disk 5 and the blades 6 rotate, centrifugally throwing out the fluid material.

[0035] Multiple blades 6 are arranged in a circumferential array around the axis of the impeller disk 5, forming a flow channel between two adjacent blades 6. The blades 6 are rotatably connected to the impeller disk 5. By controlling the rotation of the blades 6, the size of the flow channel can be changed. By controlling the blades 6 to deflect outward, the cross-section of the flow channel can be reduced, thereby reducing the centrifugal force of the blades 6 on the material and reducing the flow rate. At the same time, since the deflection of the blades 6 is close to the tangential direction, the resistance between the blades and the material is reduced, which can reduce the energy loss and load of the drive motor 2.

[0036] Reference Figure 2-3 The blades 6 are arranged in an arc shape and are in contact with the surface of the impeller disk 5. The arc-shaped blades 6 can reduce the energy loss of the liquid during the flow process and improve the efficiency of centrifugal ejection of materials when rotating.

[0037] Reference Figure 2-3 The impeller disk 5 has a tapered guide column 51 on the side near the inlet pipe 41. The tapered guide column 51 can guide the fluid to be distributed more evenly at the inlet of the blade 6, so that the load of each blade 6 is more balanced, which helps the fluid to enter the flow channel more smoothly and improves the suction performance of the delivery pump.

[0038] Reference Figure 2-5 The control component 7 includes a gear drive structure, a shaft shift drive structure, and a guide rotation structure.

[0039] The gear drive structure includes a sector gear 71 fixedly mounted on the rotating shaft of the blade 6. Multiple sector gears 71 are meshed with the same drive ring 72 with external teeth. The guide rotation structure can control the rotation of the drive ring 72, thereby causing the external teeth to drive the sector gears 71 to rotate, driving the blade 6 to rotate and change its angle, thus controlling the size of the flow channel. The length of the external teeth is greater than the length of the sector gears 71. When the drive ring 72 rotates under the action of the guide rotation structure, it will have axial displacement. Within the range of axial displacement, the external teeth and the sector gears 71 remain meshed.

[0040] The shaft-shifting drive structure has an axially movable shaft-shifting ring 73. Multiple locking blocks 74 are arranged on the outer periphery of the shaft-shifting ring 73. The locking blocks 74 engage with the inner side of the drive ring 72. The axial movement of the shaft-shifting ring 73 causes the locking blocks 74 to drive the drive ring 72 to move axially. Then, under the action of the guide rotation structure, the drive ring 72 rotates. Since the locking blocks 74 only limit the drive ring 72 axially, the drive ring 72 can rotate synchronously with the sector gear 71 and the impeller disk 5 under the drive of the drive motor 2, thereby realizing the control of the blade angle 6 without stopping the machine.

[0041] The guide rotation structure includes a fixed ring 75 fixedly installed on the side wall of the impeller disk 5. The fixed ring 75 is slidably connected to the drive ring 72 on the same axis. Multiple spiral guide bars 76 are provided on the outer side of the fixed ring 75. The inner wall of the drive ring 72 is provided with guide grooves 77 that are adapted to the guide bars 76. Both the guide bars 76 and the guide grooves 77 are spiral. Therefore, when the drive ring 72 is driven to move axially by the shaft shifting ring 73, the drive ring 72 will rotate circumferentially under the action of the guide grooves 77, thereby driving the sector gear 71.

[0042] Reference Figure 2-5Multiple positioning rods 78 are fixedly installed inside the casing 43. The positioning rods 78 are slidably connected to the shaft shifting ring 73. The positioning rods 78 can limit the circumferential movement of the shaft shifting ring 73 and guide it axially, ensuring that the shaft shifting ring 73 can move stably in the axial direction. An adjusting rod 79 is rotatably installed on the casing 43. The adjusting rod 79 is threadedly connected to the shaft shifting ring 73. The adjusting rod 79 is used to control the position of the shaft shifting ring 73. When the adjusting rod 79 is rotated, the shaft shifting ring 73 undergoes axial displacement under the action of the thread.

[0043] Reference Figure 2-5 The card block 74 has a trapezoidal card slot, and the inner wall of the drive ring 72 is adapted to the card slot. A roller 741 is rotatably arranged in the card slot. The roller 741 can effectively reduce the friction between the card slot and the drive ring 72. Since both the card slot and the inner wall of the drive ring 72 are trapezoidal, they can provide support force perpendicular to the direction of the trapezoidal slope, thereby maintaining the stability of the drive ring 72.

[0044] Working principle:

[0045] In use, the liquid inlet pipe 41 is connected to the material inlet pipe, and the liquid outlet pipe 42 is connected to the material outlet pipe. The drive motor 2 is started, and the drive motor 2 drives the impeller disk 5 and the blades 6 to rotate. The rotation of the blades 6 generates centrifugal force, causing the material to be thrown out along the outer wall of the outer shell 4 and continuously replenished from the liquid inlet pipe 41.

[0046] When material flow needs to be controlled, the axial displacement ring 73 is axially displaced by rotating the adjusting rod 79 under the action of the thread, causing the locking block 74 to drive the drive ring 72 to move axially. When the drive ring 72 moves axially, it rotates axially under the action of the guide bar 76 and the guide groove 77, thereby driving the sector gear 71 to rotate, causing the blade 6 to rotate, changing the flow channel size, and realizing flow control. During the control process, the axial displacement ring 73 does not rotate under the action of the positioning rod 78. The drive ring 72, impeller disk 5, and fixed ring 75 all rotate under the drive of the drive motor 2. The circumferential relative angle between the drive ring 72 and the sector gear 71 is controlled by the axial position of the axial displacement ring 73. At the same time, under the action of the roller 741 in the slot, the drive ring 72 is not affected by the rotation of the impeller disk 5, realizing the control of the deflection angle of the blade 6 without stopping during operation.

Claims

1. An adjustable flow rate chemical material conveying pump, comprising a mounting frame (1), wherein a drive motor (2) and a pump body (3) are mounted on the mounting frame (1), characterized in that, The pump body (3) includes: The outer casing (4) has an axially arranged inlet pipe (41) and a tangentially arranged outlet pipe (42). The impeller (5) is sealed and rotatably disposed inside the housing (4). A pump chamber is formed on the side of the impeller (5) near the inlet pipe (41), and a control chamber is formed on the side of the impeller (5) away from the inlet pipe (41). The output shaft of the drive motor (2) extends into the housing (4) and is coaxially and fixedly connected to the impeller (5). Multiple blades (6) are arranged in a circular array around the axis of the impeller disk (5), forming a flow channel between two adjacent blades (6), and the blades (6) are rotatably connected to the impeller disk (5); The control component (7), located in the control chamber, is used to control the rotation of the blades (6) to change the size of the flow channel.

2. The adjustable flow rate chemical material conveying pump according to claim 1, characterized in that, The outer shell (4) includes a cover (43) and a cover (44), which are sealed and fixedly connected. A sealing sleeve is provided on the end face of the cover (43), and the output shaft of the drive motor (2) passes through the sealing sleeve and is sealed and rotatably connected to the sealing sleeve.

3. The adjustable flow rate chemical material conveying pump according to claim 1, characterized in that, The blade (6) is arc-shaped and is in contact with the surface of the impeller disk (5).

4. The adjustable flow rate chemical material conveying pump according to claim 1, characterized in that, The impeller disk (5) has a conical guide column (51) on the side near the inlet pipe (41).

5. The adjustable flow rate chemical material conveying pump according to claim 2, characterized in that, The control component (7) includes: The gear drive structure includes a sector gear (71) fixedly mounted on the shaft of the blade (6), and multiple sector gears (71) are meshed with the same drive ring (72) with external teeth. The shaft shift drive structure has an axially movable shaft shift ring (73), and a plurality of locking blocks (74) are provided on the outer periphery of the shaft shift ring (73), which engage with the inner side of the drive ring (72); The guide rotation structure includes a fixed ring (75) fixedly installed on the side wall of the impeller disk (5). The fixed ring (75) is slidably connected to the drive ring (72) on the same axis. Multiple spiral guide strips (76) are provided on the outside of the fixed ring (75). The inner wall of the drive ring (72) is provided with guide grooves (77) that are adapted to the guide strips (76).

6. The adjustable flow rate chemical material conveying pump according to claim 5, characterized in that, Multiple positioning rods (78) are fixedly installed inside the casing (43). The multiple positioning rods (78) are slidably connected to the shaft shift ring (73). An adjusting rod (79) is rotatably installed on the casing (43). The adjusting rod (79) is threadedly connected to the shaft shift ring (73).

7. The adjustable flow rate chemical material conveying pump according to claim 5, characterized in that, The card block (74) has a trapezoidal card slot, the inner wall of the drive ring (72) is adapted to the card slot, and a roller (741) is rotatably arranged in the card slot.

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