Metering pump for accurately conveying liquid

Abstract

The utility model discloses a metering pump for accurately conveying liquid, which comprises a metering pump main body, the metering pump main body comprises a fixed cylinder and an adjusting cylinder, the fixed cylinder is connected with the adjusting cylinder through a deformation part, and the adjusting cylinder is controlled to rotate through an adjusting mechanism; the adjusting mechanism comprises an upper fixing block, a lower fixing block, an adjusting bolt and an adjusting plate, and the lower fixing block is arranged on the outer side of the fixing cylinder; a threaded hole is formed in the middle of the lower fixing block, a kidney-shaped hole is formed in the middle of the upper fixing block, and the adjusting bolt penetrates through the kidney-shaped hole and is in threaded connection with the threaded hole. A spring is arranged outside the adjusting bolt in a sleeving mode and located between the upper fixing block and the lower fixing block. The adjusting cylinder can rotate through the adjusting mechanism, the angle between the motor of the metering pump body and the driving elbow can be changed and locked, the conveying amount can be adjusted, the adjusting mechanism is durable, and the conveying amount of the metering pump can be accurately adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pumps, and particularly relates to a metering pump for accurately conveying liquids. Background Art

[0002] A metering pump, also known as a positive displacement pump or a proportional pump, is a special type of positive displacement pump mainly used for conveying liquids, especially corrosive liquids. Its prominent feature is that it can maintain a constant flow rate independent of the discharge pressure, thus simplifying the production process. The metering pump can meet the needs of various strict technological processes, and the flow rate can be steplessly adjusted within the range of 0 - 100%. By using multiple metering pumps, several media can be accurately proportioned and input into the technological process for mixing. Metering pumps are widely used in various industrial fields such as petrochemical, pharmaceutical, and food industries. In the chemical industry, metering pumps are used for accurately adding various chemical reagents; in the environmental protection field, they are used for accurately controlling the dosage of wastewater and sewage treatment agents; in industries such as food and medicine, they ensure the safety and hygiene of products.

[0003] Small precision metering pumps can achieve extremely accurate fluid dosing, with a delivery accuracy of <0.5%. This makes them a perfect solution in the fields of hemodialysis, peritoneal dialysis, or medical dosing technology. The geometric shape of the piston isolates the inlet and outlet of the pump, and by changing and locking the angle between the motor and the drive elbow, the delivery volume can be adjusted. Therefore, no additional valves are required, reducing the installation cost. However, since the metering pump often needs to adjust the flow rate during use, the existing flow rate adjustment structures perform poorly in terms of durability, causing wear and even damage, resulting in inaccurate flow rate adjustment. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a metering pump for accurately conveying liquids to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A metering pump for accurately conveying liquids, including a metering pump main body, the metering pump main body includes a fixed cylinder and an adjusting cylinder, the fixed cylinder and the adjusting cylinder are connected through a deformation part, and the adjusting cylinder is controlled to rotate through an adjusting mechanism;

[0006] The adjusting mechanism includes an upper fixing block, a lower fixing block, an adjusting bolt, and an adjusting plate. The lower fixing block is arranged on the outer side of the fixed cylinder, the upper fixing block is arranged on the outer side of the adjusting cylinder, and there are two adjusting plates, which are respectively movably installed on both sides of the lower fixing block and the upper fixing block;

[0007] Both sides of the upper fixing block and the lower fixing block are provided with fixing columns. One end of the adjusting plate is provided with a through hole, and the other end is provided with a long slot. The end of the adjusting plate with the through hole is rotatably connected to the fixing column of the upper fixing block, and the long slot is slidably connected to the fixing column of the lower fixing block;

[0008] The middle part of the lower fixing block is provided with a threaded hole, and the middle part of the upper fixing block is provided with a waist-shaped hole. The adjusting bolt passes through the waist-shaped hole and is threadedly connected to the threaded hole;

[0009] A spring is sleeved outside the adjusting bolt, and the spring is located between the upper fixing block and the lower fixing block.

[0010] Preferably, the deformation part is provided with a notch.

[0011] Preferably, a fixing plate is provided on the outer side of the adjusting cylinder, and the upper fixing block is located at the lower end of the fixing plate.

[0012] Preferably, the fixing cylinder and the adjusting cylinder are of an integrally formed structure.

[0013] Preferably, the fixing cylinder and the adjusting cylinder are made of resin materials.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] Through the adjusting mechanism of the present utility model, the adjusting cylinder can be rotated, so that the angle between the motor of the metering pump main body and the driving elbow can be changed and locked, and the conveying amount can be adjusted; by rotating the adjusting bolt, the adjusting bolt moves upward, and the spring in the compressed state has the power to push the upper fixing block upward. Since the adjusting cylinder and the fixing cylinder are connected through the deformation part, the spring drives the upper fixing block to rotate a certain angle with the deformation part as the center of the circle, so that the adjusting cylinder rotates a certain angle. Therefore, the angle between the motor of the metering pump main body and the driving elbow changes, and thus the conveying amount is adjusted; the adjusting mechanism is durable and can accurately adjust the conveying amount of the metering pump. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a front view of the present utility model;

[0018] Figure 3 is a rear view of the present utility model;

[0019] Figure 4 is a side view of the present utility model.

[0020] In the figure: 1. metering pump main body; 2. fixed cylinder; 3. adjusting cylinder; 4. deformation part; 5. upper fixing block; 6. lower fixing block; 7. adjusting bolt; 8. adjusting plate; 9. fixing column; 10. long slot; 11. waist-shaped hole; 12. spring; 13. fixing plate; 14. notch. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-4 , the present invention provides a technical solution: a metering pump for accurately conveying liquid, including a metering pump main body 1, the metering pump main body 1 includes a fixed cylinder 2 and an adjusting cylinder 3, the fixed cylinder 2 and the adjusting cylinder 3 are connected by a deformation part 4, the deformation part 4 is provided with a notch 14, and the adjusting cylinder 3 is controlled to rotate by an adjusting mechanism;

[0023] The fixed cylinder 2 and the adjusting cylinder 3 are integrally formed structures, and the fixed cylinder 2 and the adjusting cylinder 3 are made of resin materials.

[0024] Since the fixed cylinder 2 and the adjusting cylinder 3 are made of resin materials with great toughness, and there is a notch at the deformation part 4, which can increase the deformation amount of the deformation part 4. Therefore, the adjusting cylinder 3 can be rotated by the adjusting mechanism, so that the angle between the motor of the metering pump main body 1 and the driving elbow can be changed and locked, and the conveying amount can be adjusted. After the adjusting cylinder 3 rotates, the deformation part 4 deforms, and after the adjusting cylinder 3 returns to its original position, the deformation part 4 also returns to its original shape.

[0025] The adjusting mechanism includes an upper fixing block 5, a lower fixing block 6, an adjusting bolt 7 and an adjusting plate 8. The lower fixing block 6 is arranged on the outside of the fixed cylinder 2, the upper fixing block 5 is arranged on the outside of the adjusting cylinder 3, there are two adjusting plates 8, and they are respectively movably installed on both sides of the lower fixing block 6 and the upper fixing block 5;

[0026] Both sides of the upper fixing block 5 and the lower fixing block 6 are provided with fixing columns 9. One end of the adjusting plate 8 is provided with a through hole and the other end is provided with a long slot 10. The end of the adjusting plate 8 with the through hole is rotatably connected to the fixing column 9 of the upper fixing block 5, and the long slot 10 is slidably connected to the fixing column 9 of the lower fixing block 6;

[0027] The middle of the lower fixing block 6 is provided with a threaded hole, the middle of the upper fixing block 5 is provided with a waist-shaped hole 11, and the adjusting bolt 7 passes through the waist-shaped hole 11 and is threadedly connected to the threaded hole;

[0028] A spring 12 is sleeved outside the adjusting bolt 7, and the spring 12 is located between the upper fixing block 5 and the lower fixing block 6;

[0029] A fixing plate 13 is provided outside the adjusting cylinder 3, and the upper fixing block 5 is located at the lower end of the fixing plate 13.

[0030] When adjusting the delivery volume of the metering pump, rotate the adjusting bolt 7, so that the adjusting bolt 7 rotates with the threaded hole of the lower fixing block 6, causing the adjusting bolt 7 to move upward. The spring 12 in the compressed state has the power to push the upper fixing block 5 upward. Since the adjusting cylinder 3 and the fixing cylinder 2 are connected by the deformation part 4, the spring 12 drives the upper fixing block 5 to rotate a certain angle with the deformation part 4 as the center of rotation, causing the adjusting cylinder 3 to rotate a certain angle, changing the angle between the motor of the metering pump main body 1 and the driving elbow, thus adjusting the delivery volume. In addition, by setting the waist-shaped hole 11, the waist-shaped hole 11 will not interfere with the adjusting bolt 7 when the upper fixing block 5 rotates. A gasket is also installed between the adjusting bolt 7 and the upper end of the waist-shaped hole 11 to increase stability.

[0031] The working principle and usage process of the present utility model:

[0032] Since the fixing cylinder 2 and the adjusting cylinder 3 are made of resin material with great toughness, and there is a notch at the deformation part 4, which can increase the deformation amount of the deformation part 4, the adjusting mechanism can make the adjusting cylinder 3 rotate, so that the angle between the motor of the metering pump main body 1 and the driving elbow can be changed and locked, and the delivery volume can be adjusted. After the adjusting cylinder 3 rotates, the deformation part 4 deforms, and after the adjusting cylinder 3 returns to its original position, the deformation part 4 also returns to its original shape; when adjusting the delivery volume of the metering pump, rotate the adjusting bolt 7, so that the adjusting bolt 7 rotates with the threaded hole of the lower fixing block 6, causing the adjusting bolt 7 to move upward. The spring 12 in the compressed state has the power to push the upper fixing block 5 upward. Since the adjusting cylinder 3 and the fixing cylinder 2 are connected by the deformation part 4, the spring 12 drives the upper fixing block 5 to rotate a certain angle with the deformation part 4 as the center of rotation, causing the adjusting cylinder 3 to rotate a certain angle, changing the angle between the motor of the metering pump main body 1 and the driving elbow, thus adjusting the delivery volume.

[0033] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A metering pump for accurately delivering liquid, comprising a metering pump body (1), characterized in that: The metering pump body (1) comprises a fixed cylinder (2) and an adjusting cylinder (3), wherein the fixed cylinder (2) and the adjusting cylinder (3) are connected via a deformation portion (4), and the adjusting cylinder (3) is controlled to rotate via an adjusting mechanism; The adjustment mechanism comprises an upper fixing block (5), a lower fixing block (6), an adjustment bolt (7) and an adjustment plate (8); the lower fixing block (6) is arranged outside the fixing cylinder (2); the upper fixing block (5) is arranged outside the adjustment cylinder (3); two adjustment plates (8) are provided and are movably mounted on both sides of the lower fixing block (6) and the upper fixing block (5); The upper fixed block (5) and the lower fixed block (6) are both provided with fixed columns (9), one end of the adjustment plate (8) is provided with a through hole, and the other end is provided with a long hole (10), the end of the adjustment plate (8) provided with the through hole is rotatably connected to the fixed column (9) of the upper fixed block (5), and the long hole (10) is slidably connected to the fixed column (9) of the lower fixed block (6); A threaded hole is provided in the middle of the lower fixing block (6), a waist-shaped hole (11) is provided in the middle of the upper fixing block (5), and the adjusting bolt (7) passes through the waist-shaped hole (11) and is connected to the threaded hole by means of threads; A spring (12) is sleeved on the outside of the adjusting bolt (7), and the spring (12) is located between the upper fixing block (5) and the lower fixing block (6).

2. A metering pump for accurately conveying liquid according to claim 1, characterized in that: The deformation portion (4) is provided with a notch (14).

3. A metering pump for accurately delivering liquid according to claim 1, characterized in that: A fixing plate (13) is provided on the outside of the adjusting cylinder (3), and the upper fixing block (5) is located at the lower end of the fixing plate (13).

4. A metering pump for accurately delivering liquid according to claim 1, characterized in that: The fixing cylinder (2) and the adjusting cylinder (3) are an integrally formed structure.

5. A metering pump for accurately delivering liquid according to claim 1, characterized in that: The fixing cylinder (2) and the adjusting cylinder (3) are made of resin material.

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