Knob type adjustable ceramic metering pump

Abstract

The invention discloses a knob type adjustable ceramic metering pump, and belongs to the technical field of metering pumps. The metering pump comprises a plurality of components such as a screw, a pump head cover, a sleeve cover, a sleeve, a column rod, an adjusting knob, a check ring and a bearing seat. The adjusting knob is rotated to extrude the copper pad, so that the angle of the check ring is changed to adjust the liquid amount, a special tool is not needed, and the adjustment is convenient; through bottom contact type positioning of the pump rod, the lower plane of the column rod is in light contact with the sleeve cover, the position of the column rod can be adjusted by rotating the bearing seat, dead volume is avoided, and the liquid injection precision is guaranteed. The problems that an existing micro ceramic pump is tedious in adjustment and insufficient in precision are solved, and the micro ceramic pump is suitable for high-precision liquid injection scenes of multiple industrial departments such as chemical engineering and pharmacy.

Description

Technical Field

[0001] This invention belongs to the field of metering pump technology, and specifically relates to a knob-type adjustable ceramic metering pump. Background Technology

[0002] In industrial production and scientific research, metering pumps are important fluid transport devices that can accurately deliver various liquids at predetermined flow rates. Currently, the main way to adjust the flow rate of a metering pump is by changing the stroke length of the pump's piston (plunger). This method has the advantages of high metering accuracy, meeting linearity requirements even at low flow rates, and the plunger stroke is determined by the scale of the adjusting handwheel. It is widely used, simple, and reliable.

[0003] The specific operating procedure is as follows: Loosen the stroke locking bolt located on the pump side cover with a wrench to adjust the pump flow rate. Adjusting the micrometer-scale stroke adjustment knob can change the pump flow rate; rotating it clockwise decreases the flow rate, and rotating it counterclockwise increases the flow rate. After adjusting the knob to the desired flow rate, tighten the stroke locking bolt with a wrench to maintain the set flow rate.

[0004] Existing micro-volume ceramic pumps on the market require specialized tools to operate adjustment elements (such as adjusting bolts or adjusting rods) to change the flow volume when adjusting the flow rate. This method is cumbersome and inefficient for scenarios where the liquid volume is frequently changed. Furthermore, existing micro-volume ceramic pumps cannot achieve precise positioning of the pump rod and the bottom of the pump chamber, which can easily lead to the formation of dead volume, resulting in residues or air bubbles, affecting the accuracy of liquid injection and failing to meet the requirements for high-precision liquid injection.

[0005] However, as industrial production places increasing demands on the ease of use and accuracy of metering pumps, existing technologies have gradually revealed some shortcomings in practical applications, requiring further improvement. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes a knob-type adjustable ceramic metering pump, comprising a screw, pump head cover, sleeve cover, sleeve, lip seal, white gasket, lock nut, sealing ring, rod, lever seat, lever, adjusting knob, copper pad, adjusting seat, retaining ring, steel wire, pump head seat, hand-tightening screw, dial, universal ball seat, universal ball, rotating seat, bearing seat, bearing, and central shaft. The adjusting knob contacts the copper pad, and the copper pad contacts the retaining ring. Rotating the adjusting knob compresses the copper pad, causing the retaining ring to change angle to adjust the liquid volume. The initial position of the rod is that its lower plane lightly touches the sleeve cover. The position of the rod can be adjusted by rotating the bearing seat through the positioning adjustment hole.

[0007] Furthermore, the initial state of the retaining ring bending angle is the maximum liquid volume, and the minimum liquid volume is when the retaining ring bending angle approaches 0.

[0008] Furthermore, the distance between the rod and the sleeve cover is a set liquid volume.

[0009] Furthermore, the rod and sleeve are made of ceramic material.

[0010] Furthermore, the lip seal, sealing ring, and white gasket are made of oil-resistant and chemically resistant rubber materials.

[0011] Furthermore, the copper pad is made of pure copper.

[0012] Furthermore, the retaining ring is made of a metal material that is both elastic and strong.

[0013] Furthermore, it also includes a dial for displaying liquid volume markings.

[0014] Furthermore, it also includes a hand-tightening screw, which is used to assist in fixing the adjusted liquid volume setting.

[0015] Beneficial effects

[0016] Convenient and efficient adjustment: The structure design adopts a knob-type adjustment of liquid volume, which eliminates the need for special tools. Operators can adjust it directly by hand, simplifying the adjustment steps and improving the adjustment efficiency. It is especially suitable for scenarios where the liquid volume needs to be changed frequently.

[0017] High metering accuracy: The bottom-contact positioning structure of the pump rod allows the rod and sleeve cover to touch lightly, effectively avoiding the generation of dead volume in the pump chamber, reducing the impact of residue and air bubbles on the injection accuracy, and ensuring metering accuracy under various flow conditions.

[0018] Stable and reliable structure: The precise fit between the components, through reasonable structural design and material selection, ensures the stability and service life of the metering pump, enabling it to work stably in different industrial environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall assembly structure of a knob-type adjustable ceramic metering pump according to the present invention.

[0020] Figure 2 This is a schematic diagram of the liquid volume adjustment part of the present invention;

[0021] Figure 3 This is a schematic diagram of the mating structure of the retaining ring and related components of the present invention, showing the state with the minimum liquid volume;

[0022] Figure 4 This is a schematic diagram of the mating structure of the retaining ring and related components of the present invention, showing the state of maximum liquid volume;

[0023] Figure 5This is a schematic diagram of the bottom-contact positioning part of the pump rod of the present invention;

[0024] Figure 6 This is a schematic diagram of the bearing housing and positioning adjustment hole of the present invention. Detailed Implementation

[0025] Example 1

[0026] (I) Selection of Component Materials

[0027] Columns and sleeves: Made of ceramic material, which has excellent corrosion resistance, wear resistance and surface smoothness, effectively avoiding corrosion and wear caused by liquid, while reducing liquid residue during transportation, ensuring metering accuracy and equipment service life.

[0028] Structural components such as adjustment knobs, pump head seats, and adjustment bases can be made of high-strength engineering plastics (such as PTFE, nylon, etc.) or metal materials (such as stainless steel, aluminum alloy, etc.). Engineering plastics are lightweight, low-cost, and corrosion-resistant; metal materials have higher strength and rigidity, making them suitable for applications requiring high structural strength.

[0029] Sealing components (lip seal, sealing ring, white gasket): Oil-resistant, chemically resistant, and highly elastic rubber materials (such as nitrile rubber, fluororubber, etc.) are selected to ensure the sealing performance of the metering pump and prevent liquid leakage.

[0030] Copper pad: Made of pure copper, which has good ductility, ensuring effective force transmission and making the angle change of the retaining ring smooth and controllable.

[0031] Retaining ring and steel wire: The retaining ring is made of stainless steel with a certain degree of elasticity and strength to ensure that it can change angle under stress and is not easily damaged; the steel wire is made of high-strength steel wire to ensure the fixing effect of the retaining ring.

[0032] (II) Assembly Steps

[0033] First, install the bearing into the bearing housing, ensuring a tight fit between the bearing and the housing, and that the bearing can rotate freely.

[0034] The central shaft is passed through the bearing inside the bearing housing, so that the central shaft fits tightly with the inner ring of the bearing, ensuring smooth rotation of the central shaft.

[0035] Install the swivel base, omnidirectional ball, and omnidirectional ball seat. Place the omnidirectional ball inside the omnidirectional ball seat, and then connect and fix the omnidirectional ball seat to the swivel base to ensure that the omnidirectional ball can rotate freely inside the omnidirectional ball seat.

[0036] Assemble the lever holder and lever, and fix the lever on the lever holder to ensure that the lever can swing flexibly.

[0037] Connect and fix the assembled components to the pump head seat, ensuring that each component is in the correct position and the connection is secure.

[0038] Install the sleeve and sleeve cover, connect the sleeve to the pump head seat, and then cover it with the sleeve cover to ensure the sealing performance between the sleeve and the sleeve cover.

[0039] Install the column rod so that it passes through sealing components such as lip seals and sealing rings, and ensure that the column rod can move smoothly within the sleeve and that the sealing components can effectively seal.

[0040] Assemble the adjusting seat, retaining ring, copper pad, and adjusting knob. Fix the retaining ring to the adjusting seat with a steel wire. After placing the copper pad, install the adjusting knob to ensure that the adjusting knob can squeeze the copper pad and change the angle of the retaining ring when it is turned.

[0041] Install a dial so that the scale corresponds to the adjustment amount of the adjustment knob, making it easy for the operator to observe and adjust.

[0042] Install the pump head cover and secure it to the pump head base with screws to protect the internal components.

[0043] Finally, install auxiliary components such as hand-tightening screws to complete the assembly of the entire metering pump.

[0044] (III) Debugging Methods

[0045] 1. Liquid volume adjustment and debugging

[0046] Rotate the adjustment knob and observe whether the angle of the retaining ring changes smoothly and without any jamming. If jamming occurs, check whether the relevant components are installed correctly or if there is any interference, and adjust accordingly.

[0047] Rotate the adjustment knob gradually, observing the corresponding graduations on the dial. Record the actual liquid volume corresponding to each graduation to verify the accuracy of the graduations. If there is a deviation, adjust the position of the dial or fine-tune the adjustment mechanism.

[0048] Repeatedly adjust the liquid volume to test the repeatability and stability of the adjustment, ensuring that high accuracy can still be maintained after multiple adjustments.

[0049] 2. Pump rod positioning and debugging

[0050] Check if the initial position of the column rod is such that the lower plane of the column rod is lightly touching the sleeve cover. If not, rotate the bearing seat through the positioning adjustment hole to adjust the position of the column rod until the requirements are met.

[0051] Adjust the column rod to different positions, measure the distance between the column rod and the sleeve cover, verify the correspondence between the distance and the set liquid volume, and ensure that the distance is accurate and controllable.

[0052] Conduct a simulated injection test to observe whether there are any residues or air bubbles in the pump chamber. If so, further fine-tune the position of the column until the residues and air bubbles are eliminated to ensure injection accuracy.

Claims

1. A knob-type adjustable ceramic metering pump, characterized in that, Includes screw (1), pump head cover (2), sleeve cover (3), sleeve (4), lip seal (5), white gasket (6), lock nut (7), sealing ring (8), column rod (9), lever seat (10), lever (11), adjusting knob (12), copper washer (13), adjusting seat (14), retaining ring (15), steel wire (16), pump head seat (17), hand screw (18), dial (19), universal ball seat (20), universal ball (21), rotating seat (22). The bearing housing (23), bearing (24), and central shaft (25) are included. The adjusting knob (12) is in contact with the copper pad (13), and the copper pad (13) is in contact with the retaining ring (15). Rotating the adjusting knob (12) can squeeze the copper pad (13) and cause the retaining ring (15) to change angle to adjust the liquid volume. The initial position of the rod (9) is that the lower plane of the rod (9) touches the sleeve cover (3). The position of the rod (9) can be adjusted by rotating the bearing housing (23) through the positioning adjustment hole.

2. The rotary adjustable ceramic metering pump according to claim 1, characterized in that, The initial state of the bending angle of the retaining ring (15) is the maximum liquid volume, and the minimum liquid volume is when the bending angle of the retaining ring (15) approaches 0.

3. The rotary adjustable ceramic metering pump according to claim 1, characterized in that, The distance between the rod (9) and the sleeve cover (3) is the set liquid volume.

4. The rotary adjustable ceramic metering pump according to claim 1, characterized in that, The column rod (9) and sleeve (4) are made of ceramic material.

5. A knob-type adjustable ceramic metering pump according to claim 1, characterized in that, The lip seal (5), sealing ring (8) and white gasket (6) are made of oil-resistant and chemically resistant rubber material.

6. A knob-type adjustable ceramic metering pump according to claim 1, characterized in that, The copper pad (13) is made of pure copper.

7. A knob-type adjustable ceramic metering pump according to claim 1, characterized in that, The retaining ring (15) is made of a metal material that is both elastic and strong.

8. A knob-type adjustable ceramic metering pump according to claim 1, characterized in that, It also includes a dial (19) for displaying liquid volume scales.

9. A knob-type adjustable ceramic metering pump according to claim 1, characterized in that, It also includes a hand-tightening screw (18), which is used to assist in fixing the adjusted liquid volume setting.

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