Single-double-head metering pump with novel structure

Abstract

The utility model belongs to the technical field of metering pumps, and provides a novel-structure single-head and double-head metering pump which comprises a motor and main supports fixedly arranged at the two ends of the motor, the main supports are further provided with metering pump assemblies in a matched mode, a double-shaft motor is arranged, and the motor is provided with a first output shaft and a second output shaft. Main supports are fixedly arranged on the two sides of the motor, adjusting supports are arranged on the main supports in a matched mode, the adjusting supports and the main supports are both in an L shape, the metering pump assembly is fixedly installed on the adjusting supports, and the adjusting supports and the main supports only need one contact face to rotate relative to the center of an adjusting piece so as to change the telescopic distance of a movable plunger rod in the pump. In addition, the multifunctional coupling, the knuckle bearing body and the optocoupler separation blade are designed into one part (namely the multifunctional coupling), so that the cost can be reduced; the distance between the motor shaft and the piston rod is shortened, parts are reduced, the motion inertia of a product is improved, the accuracy is improved, and the motion life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of metering pumps, and particularly relates to a single-head and double-head metering pump with a novel structure. Background Art

[0002] A metering pump is also called a valveless pump. When the required liquid delivery volume changes, it can be achieved by adjusting the stroke of the plunger in the pump to change the stroke of the piston rod.

[0003] In the prior art, three parts, namely a multi-functional coupling, an opto-coupler baffle, and a spherical plain bearing, which are fixed to the motor shaft, are required to achieve the suction and discharge movement of the metering pump. Moreover, the main bracket and the adjustment bracket for adjustment are matched in the way of U-shaped + U-shaped, and it is necessary to ensure the adjustment of two pairs of contact surfaces. If two metering pumps are required, two separate motors and opto-couplers are needed for control, which increases the cost. Content of the Utility Model

[0004] The utility model provides a single-head and double-head metering pump with a novel structure, which solves the problems in the prior art.

[0005] The technical solution of the utility model is realized as follows:

[0006] A single-head and double-head metering pump with a novel structure, characterized in that it includes a motor, and a main bracket fixedly arranged at both ends of the motor. The main bracket is also provided with a metering pump assembly in cooperation. The metering pump assembly includes an adjustment bracket rotatably arranged with the main bracket, and an adjusting member is further arranged between the adjustment bracket and the main bracket;

[0007] The metering pump assembly further includes a pump body arranged on the adjustment bracket, and a piston rod is movably arranged inside the pump body;

[0008] The adjustment bracket rotates relative to the main bracket with the axis of the adjusting member as the center, so that the telescopic distance of the piston rod in the pump body can be changed.

[0009] Furthermore, the flatness of the main bracket and the adjustment bracket is the same.

[0010] Furthermore, the cross-sectional shapes of both the main bracket and the adjustment bracket are L-shaped.

[0011] Furthermore, the motor includes a first output shaft and a second output shaft, and the output shafts are respectively connected to two groups of metering pump assemblies.

[0012] Furthermore, the metering pump assembly further includes a pump body arranged on the adjustment bracket, and a piston rod is movably arranged inside the pump body. A multi-functional coupling is further arranged between the piston rod and the output shaft.

[0013] Furthermore, the multi-functional coupling includes a housing, and a universal ball is movably arranged inside the housing. A connecting shaft is arranged between the universal ball and the piston rod.

[0014] Furthermore, a connection end is integrally provided at one end of the housing close to the output shaft, and the multi-functional coupling is fixedly connected to the output shaft through the connection end.

[0015] Furthermore, a retaining piece is provided on the multi-functional coupling, and an opto-coupler is fixedly provided corresponding to the retaining piece on the upper end surface of the main bracket.

[0016] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0017] In the present utility model, by providing a dual-shaft motor with a first output shaft and a second output shaft, and main brackets are fixedly provided on both sides of the motor. The main brackets are cooperated with adjustment brackets. Among them, both the adjustment bracket and the main bracket are L-shaped. The metering pump assembly is fixedly installed on the adjustment bracket. The adjustment bracket and the main bracket only need one contact surface to rotate relatively around the center of the adjusting part to change the telescopic distance of the movable plunger rod in the pump, so as to adjust the measuring range. And the multi-functional coupling, the joint bearing body, and the opto-coupler retaining piece are designed as one part (i.e., the multi-functional coupling). Firstly, it can reduce costs; secondly, it can reduce the distance between the motor shaft and the piston rod and reduce the number of parts, improve the moment of inertia of the product, and improve the accuracy and service life of the movement. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of a novel structure single-head and double-head metering pump of the present utility model;

[0020] Figure 2 It is a schematic diagram of the overall structure of the motor;

[0021] Figure 3 It is a schematic diagram of the connection structure between the motor and a group of metering pump assemblies;

[0022] Figure 4 It is a schematic diagram of the overall structure of the multi-functional coupling.

[0023] In the figure, 10, motor; 11, first output shaft; 12, second output shaft; 13, main bracket; 20, metering pump assembly; 201, adjustment bracket; 202, adjusting part; 203, multi-functional coupling; 2031, housing; 2032, universal ball; 2033, connection end; 204, pump body; 205, piston rod; 206, connecting shaft; 30, retaining piece; 31, opto-coupler. Detailed implementation manners

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment: As Figures 1-4 shown, a new structure single / double-head metering pump includes a motor 10, main brackets 13 fixedly arranged at both ends of the motor 10, and corresponding groups of metering pump assemblies 20 are also cooperatively arranged with the main brackets 13. The metering pump assembly 20 includes an adjustment bracket 201 rotatably arranged with the main bracket 13, and an adjusting member 202 is also arranged between the adjustment bracket 201 and the main bracket 13;

[0026] The metering pump assembly 20 further includes a pump body 204 arranged on the adjustment bracket 201, and a piston rod 205 is movably arranged inside the pump body 204;

[0027] The adjustment bracket 201 rotates relative to the main bracket around the axis of the adjusting member 202, so that the telescopic distance of the piston rod 205 in the pump body 204 can be changed; thereby adjusting the measuring range of the metering pump assembly 20;

[0028] Preferably, as Figures 1-2 shown, the motor 10 includes a first output shaft 11 and a second output shaft 12. The output shafts 11 and 12 are respectively connected to two groups of metering pump assemblies 20. By using a double-shaft motor, the two output shafts 11 and 12 are respectively connected to the metering pump assemblies 20, thereby reducing the number of groups of motors used;

[0029] Preferably, as Figure 3 shown, a multi-functional coupling 203 is also arranged between the piston rod 205 and the output shafts 11 and 12;

[0030] Preferably, as Figure 3 shown, the multi-functional coupling 203 includes a housing 2031, and a connecting end 2033 is integrally arranged at one end of the housing 2031 close to the output shafts 11 and 12. The multi-functional coupling 203 is fixedly connected to the output shafts 11 and 12 through the connecting end 2033.

[0031] In actual use, the relative positions between the two sets of adjustment brackets 201 and the main bracket 13 can be adjusted simultaneously, or only the positions of one set of adjustment brackets 201 and the main bracket 13 can be adjusted to achieve the function of adjusting the range of the metering pump assembly 20. After the relative positions between the adjustment brackets 201 and the main bracket 13 are adjusted, the two brackets are locked by the adjusting member 202, and then the motor 10 is started to drive the metering pump assembly 20 to work. The specific principle is that the metering pump assembly 20 on the adjustment bracket 201 undergoes a position offset, thereby changing the maximum stroke of the piston rod 205 inside the pump body 204. During operation, the output shafts 11 and 12 of the motor 10 drive the multi-functional coupling 203 to rotate, and the multi-functional coupling 203 drives the piston rod 205 to displace in the pump body 204;

[0032] Preferably, the specific connection structure between the multi-functional coupling 203 and the piston rod 205 is as follows Figures 3-4 shown. A universal ball 2032 is also movably arranged inside the housing 2031, and a connecting shaft 206 is arranged between the universal ball 2032 and the piston rod 205; the housing 2031 drives the universal ball 2032 to rotate, and through the connecting shaft 206 arranged between the universal ball 2032 and the piston rod 205, the piston rod 205 moves back and forth in the pump body 204 to realize the suction and discharge functions;

[0033] Preferably, the flatness of the main bracket 13 and the adjustment bracket 201 is the same; the cross-sectional shapes of both the main bracket 13 and the adjustment bracket 201 are L-shaped; this ensures that the piston rod 205 moves normally along the inside of the pump body 204;

[0034] Preferably, a retaining piece 30 is also fixedly installed on the outer peripheral surface of the housing 2031, and an opto-coupler 31 is correspondingly and fixedly arranged between the upper end surface of the main bracket 13 and the retaining piece 30; when the motor 10 rotates, it drives the retaining piece 30 to pass through the opto-coupler 31, thereby realizing the control of the number of times of liquid suction and discharge of the metering pump each time;

[0035] Designing the spherical plain bearing body and the retaining piece on one part (i.e., the multi-functional coupling 203) has two advantages: one is to reduce costs; the other is to shorten the distance between the output shaft of the motor and the piston rod 205 and reduce the number of parts, improve the moment of inertia of the product, and improve the accuracy and service life.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A single- and double-head metering pump with a new structure, characterized in that, It includes a motor (10), main brackets (13) fixedly arranged at both ends of the motor (10), and a metering pump assembly (20) is also cooperatively arranged on the main brackets (13). The metering pump assembly (20) includes an adjustment bracket (201) rotatably arranged with the main brackets (13), and an adjusting member (202) is also arranged between the adjustment bracket (201) and the main brackets (13); The metering pump assembly (20) further includes a pump body (204) arranged on the adjustment bracket (201), and a piston rod (205) is movably arranged inside the pump body (204); The adjustment bracket (201) rotates relative to the main brackets around the axis of the adjusting member (202), so that the telescopic distance of the piston rod (205) in the pump body (204) can be changed.

2. The novel structure single / double-head metering pump according to claim 1, wherein, The flatness of the main brackets (13) is consistent with that of the adjustment bracket (201).

3. The novel structure single-head and double-head metering pump according to claim 2, characterized in that, The cross-sectional shapes of the main brackets (13) and the adjustment bracket (201) are both L-shaped.

4. The novel structure single-head and double-head metering pump according to claim 1, wherein, The motor (10) includes a first output shaft (11) and a second output shaft (12), and the output shafts (11, 12) are respectively connected to two groups of metering pump assemblies (20).

5. The novel structure single-head and double-head metering pump according to claim 4, wherein A multi-functional coupling (203) is also arranged between the piston rod (205) and the output shafts (11, 12).

6. The novel structure single / double-headed metering pump according to claim 5, characterized in that, The multi-functional coupling (203) includes a housing (2031), and a universal ball (2032) is movably arranged inside the housing (2031). A connecting shaft (206) is arranged between the universal ball (2032) and the piston rod (205).

7. The novel structure single-head and double-head metering pump according to claim 6, characterized in that, One end of the housing (2031) close to the output shafts (11, 12) is integrally provided with a connecting end (2033), and the multi-functional coupling (203) is fixedly connected to the output shafts (11, 12) through the connecting end (2033).

8. The novel structure single-head and double-head metering pump according to claim 7, characterized in that, A retaining piece (30) is arranged on the multi-functional coupling (203), and an optical coupler (31) is correspondingly and fixedly arranged between the upper end face of the main brackets (13) and the retaining piece (30).

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