Precise metering pump based on electromagnetic valve control

Abstract

The utility model discloses a precise metering pump based on electromagnetic valve control, which comprises a pump body and a pump head which are matched with each other, a liquid injection port and a liquid outlet are arranged on the pump head, a plunger connected with a piston rod is arranged in the pump body, a liquid two-position three-way electromagnetic valve used for connecting and disconnecting a liquid conveying passage is arranged on the pump head, and a liquid outlet is arranged on the pump head. The pump body is connected with a pneumatic driving assembly used for driving the plunger to move, the pneumatic driving assembly is provided with a speed adjusting assembly, and the pump body is further provided with a micrometer assembly used for adjusting the single-time pump liquid amount. The metering pump has the advantages that the metering pump is simple and compact in structure, the two-position three-way electromagnetic valve for liquid is adopted to control on-off of a liquid conveying channel, installation is convenient, an additional driving mechanism does not need to be added, the size of the metering pump can be greatly reduced, the speed adjusting assembly is arranged on the metering pump to adjust the pump liquid speed, and the micrometer assembly is arranged to adjust the single-time pump liquid amount.

Description

Technical Field

[0001] The utility model relates to the technical field of metering pump manufacturing, in particular to a precision metering pump based on electromagnetic valve control. Background Art

[0002] Many industries, such as the pharmaceutical industry, food industry, and pharmaceutical industry, have filling procedures in their production processes, and metering pumps are generally used to transport liquids during the filling process.

[0003] At present, the inlet and outlet of most metering pumps are controlled by rotary valves or one-way valves. The rotary valve needs to be equipped with a drive assembly on the side to drive the rotation of the valve core. The setting of the drive assembly will increase the volume and weight of the pump; and the one-way valve has many small parts, which is inconvenient to load and unload, and will greatly increase the difficulty of maintenance. Therefore, the existing metering filling equipment needs to be further improved. Utility Model Content

[0004] The purpose of the utility model is to make up for the above-mentioned deficiencies and disclose to the public a precision metering pump based on solenoid valve control which has a simple and compact structure and can adjust the single pumping liquid volume and pumping liquid speed.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A precision metering pump based on solenoid valve control includes a matching pump body and a pump head, the pump head is provided with a liquid injection port and a liquid outlet, the pump body is provided with a plunger connected to a piston rod, the pump head is provided with a two-position three-way solenoid valve for liquid use for opening and closing an infusion passage, the pump body is connected to a pneumatic drive assembly for driving the plunger to move, the pneumatic drive assembly is provided with a speed adjustment assembly, and the pump body is also provided with a micrometer assembly for adjusting the amount of liquid pumped in a single time.

[0007] The measures to further optimize this technical solution are:

[0008] As an improvement, the speed adjustment component includes an adjustment knob and an adjustment rod that is axially movable and controlled by the adjustment knob. The speed adjustment component adjusts the effective air passage area of ​​the airway by adjusting the extension length of the adjustment rod, thereby adjusting the speed of the inlet and outlet air, thereby achieving the purpose of adjusting the pumping speed.

[0009] As an improvement, the micrometer assembly includes a knob and a moving sleeve, a locking pin is arranged in the moving sleeve, and the locking pin is controlled to move axially by the knob. The micrometer assembly adjusts the stroke distance of the piston rod by adjusting the extension length of the locking pin, thereby achieving the purpose of adjusting the liquid volume of a single pump.

[0010] As an improvement, in the pump body, a first sealing sleeve is arranged on the outer periphery of the plunger, and a first sealing member is arranged between the first sealing sleeve and the plunger.

[0011] As an improvement, a second sealing sleeve is provided on the outer periphery of the piston rod in the pump body, and a second sealing member is provided between the second sealing sleeve and the piston rod.

[0012] As an improvement, a connector is provided between the piston rod and the plunger.

[0013] As an improvement, the outer periphery of the connecting head is provided with a clamping groove, the outer periphery of the piston rod is provided with a clamping portion adapted to the clamping groove, and the plunger is fixed to the center of the connecting head.

[0014] The piston rod and the plunger can be easily connected by a connecting head, and the parts will not be too long, which is convenient for processing.

[0015] As an improvement, the pneumatic drive assembly is provided with an L-shaped air source connector, which makes the structure more compact and the overall space occupied by the metering pump smaller.

[0016] As an improvement, a wet cup is provided on the pump body, which plays a lubricating role, can reduce the sliding resistance of the plunger and the piston rod, and reduce wear.

[0017] The advantages of the utility model compared with the prior art are:

[0018] The utility model discloses a precision metering pump based on solenoid valve control, which has a simple and compact structure. It adopts a two-position three-way solenoid valve for liquid to control the on-off of the infusion passage. It is easy to install and does not need to add an additional driving mechanism. It can greatly reduce the volume of the metering pump. A speed adjustment component is arranged on the metering pump to adjust the pumping speed, and a micrometer component is arranged to adjust the single pumping amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0020] Figure 2 It is a cross-sectional structural diagram of the utility model;

[0021] Figure 3 yes Figure 2 Enlarged view of part A in the middle;

[0022] Figure 4 yes Figure 2 Enlarged view of middle part B;

[0023] Figure 5 It is a cross-sectional structural diagram of the speed regulating component of the utility model.

[0024] The names of the reference numerals in the accompanying drawings of the present utility model are:

[0025] Pump body 1, pump head 2, liquid injection port 2a, liquid outlet 2b, piston rod 31, clamping part 31a, plunger 32, connector 33, clamping groove 33a, liquid two-position three-way solenoid valve 4, pneumatic drive assembly 5, air source connector 51, micrometer assembly 6, knob 61, movable sleeve 62, locking needle 63, speed adjustment assembly 7, adjustment knob 71, adjustment rod 72, first sealing sleeve 81, first sealing member 81a, second sealing sleeve 82, second sealing member 82a, wet cup 9. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below with reference to the accompanying drawings:

[0027] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be used for other implementation schemes, variations, improvements, equivalent schemes, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0028] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0029] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0030] like Figures 1 to 5 As shown, a precision metering pump based on solenoid valve control includes a matching pump body 1 and a pump head 2, the pump head 2 is provided with a liquid injection port 2a and a liquid outlet 2b, the pump body 1 is provided with a plunger 32 connected to a piston rod 31, the pump head 2 is provided with a liquid two-position three-way solenoid valve 4 for opening and closing the infusion passage, the pump body 1 is connected with a pneumatic drive component 5 for driving the plunger 32 to move, the pneumatic drive component 5 is provided with a speed adjustment component 7, and the pump body 1 is also provided with a micrometer component 6 for adjusting the liquid volume of a single pump.

[0031] The speed adjustment assembly 7 includes an adjustment knob 71 and an adjustment rod 72 which is axially movable and controlled by the adjustment knob 71 .

[0032] The micrometer assembly 6 includes a knob 61 and a movable sleeve 62 . A locking pin 63 is arranged in the movable sleeve 62 . The locking pin 63 is controlled to move axially by the knob 61 .

[0033] In the pump body 1, a first sealing sleeve 81 is arranged on the outer periphery of the plunger 32, and a first sealing member 81a is arranged between the first sealing sleeve 81 and the plunger 32. The first sealing member 81a ensures the sealing between the first sealing sleeve 81 and the plunger 32.

[0034] In the pump body 1, a second sealing sleeve 82 is arranged on the outer periphery of the piston rod 31, and a second sealing member 82a is arranged between the second sealing sleeve 82 and the piston rod 31. The second sealing member 82a ensures the sealing between the second sealing sleeve 81 and the piston rod 31.

[0035] A connector 33 is provided between the piston rod 31 and the plunger 32 .

[0036] The outer periphery of the connector 33 is provided with a card slot 33a, the outer periphery of the piston rod 31 is provided with a card connection portion 31a adapted to the card slot 33a, and the plunger 32 is fixed to the center of the connector 33. Through the cooperation of the card connection portion 31a and the card slot 33a, the piston rod 31 and the connector 33 are fixed together, and the plunger 32 is fixed to the center of the connector 33, so that the connection between the plunger 32 and the piston rod 31 is realized.

[0037] In this embodiment, the pneumatic drive assembly 5 is provided with an L-shaped air source connector 51. The L-shaped air source connector 51 can make the structure more compact.

[0038] The pump body 1 is provided with a wet cup 9. When in use, lubricating liquid is added into the wet cup 9 to play a lubricating role, which can reduce the sliding resistance of the plunger 32 and the piston rod 31 and reduce wear.

[0039] Working principle:

[0040] The precision metering pump of the utility model is provided with a two-position three-way solenoid valve 4 for liquid on the pump head 2 to control the on-off of the infusion passage, realize the suction and output of liquid, and thus realize the delivery of liquid. The two-position three-way solenoid valve 4 for liquid is simple in structure, compact, and easy to install.

[0041] The precision metering pump is provided with a speed adjustment component 7, which includes an adjustment knob 71 and an adjustment rod 72. The adjustment knob 71 is screwed to the pump body 1, and the adjustment rod 72 is connected to the adjustment knob 71. The adjustment knob 71 is rotated to realize the axial movement of the adjustment rod 72, and the length of the adjustment rod 72 extending into the gas channel is adjusted. The extension of the adjustment rod 72 will change the effective flow area of ​​the gas channel. By adjusting the effective flow area, the inlet and outlet speeds can be adjusted, thereby realizing the adjustment of the pumping liquid speed. In other words, the faster the inlet and outlet speeds, the faster the pumping liquid speed.

[0042] The precision metering pump is provided with a micrometer assembly 6, which includes a knob 61, a movable sleeve 62 and a locking needle 63. The knob 61 is connected to the movable sleeve 62 and the locking needle 63. The movable sleeve 62 is threadedly connected to the pump body 1. Rotating the knob 61 can realize the axial movement of the movable sleeve 62 and the locking needle 63, thereby adjusting the length of the locking needle 63 extending into the pump cavity. When the piston rod 31 abuts against the end of the locking needle 63, it reaches the right limit position. Therefore, the stroke of the piston rod 31 can be adjusted by adjusting the position of the locking needle 63, thereby realizing the adjustment of the liquid volume of a single pump.

[0043] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A precision metering pump based on electromagnetic valve control, comprising a matching pump body (1) and a pump head (2), wherein the pump head (2) is provided with a liquid injection port (2a) and a liquid outlet (2b), and the pump body (1) is provided with a plunger (32) connected to a piston rod (31), wherein: The pump head (2) is provided with a two-position three-way solenoid valve (4) for opening and closing the infusion passage; the pump body (1) is connected with a pneumatic drive assembly (5) for driving the plunger (32) to move; the pneumatic drive assembly (5) is provided with a speed adjustment assembly (7); the pump body (1) is also provided with a micrometer assembly (6) for adjusting the amount of liquid pumped in a single time.

2. According to claim 1, a precision metering pump based on solenoid valve control is characterized in that: The speed adjustment component comprises an adjustment knob (71) and an adjustment rod (72) which is controlled by the adjustment knob (71) and can move axially.

3. A precision metering pump based on solenoid valve control according to claim 2, characterized in that: The micrometer assembly (6) comprises a knob (61) and a movable sleeve (62). A locking pin (63) is arranged in the movable sleeve (62). The locking pin (63) is controlled to move axially by the knob (61).

4. A precision metering pump based on solenoid valve control according to claim 3, characterized in that: In the pump body (1), a first sealing sleeve (81) is arranged on the outer periphery of the plunger (32), and a first sealing member (81a) is arranged between the first sealing sleeve (81) and the plunger (32).

5. A precision metering pump based on solenoid valve control according to claim 4, characterized in that: In the pump body (1), a second sealing sleeve (82) is arranged on the outer periphery of the piston rod (31), and a second sealing member (82a) is arranged between the second sealing sleeve (82) and the piston rod (31).

6. A precision metering pump based on solenoid valve control according to claim 5, characterized in that: A connector (33) is provided between the piston rod (31) and the plunger (32).

7. A precision metering pump based on solenoid valve control according to claim 6, characterized in that: The outer periphery of the connecting head (33) is provided with a clamping groove (33a), the outer periphery of the piston rod (31) is provided with a clamping portion (31a) adapted to the clamping groove (33a), and the plunger (32) is fixed to the center of the connecting head (33).

8. A precision metering pump based on solenoid valve control according to any one of claims 1 to 7, characterized in that: The pneumatic drive assembly (5) is provided with an air source connector (51) in an L-shaped structure.

9. A precision metering pump based on solenoid valve control according to claim 8, characterized in that: The pump body (1) is provided with a wet cup (9).

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