Multi-stroke electric diaphragm pump

Abstract

The utility model discloses a kind of multi-stroke electric diaphragm pump, which belongs to diaphragm pump technical field.It solves the defects of low conveying efficiency and unstable material conveying of the traditional diaphragm pump in the prior art, which is symmetrically distributed in two cavities.The main structure includes a motor, a transmission box and a diaphragm pump shell body.Four cavities are provided in the diaphragm pump shell body, and the four cavities have the same structure, each including a cavity inner shell and a cavity outer shell connected to the cavity inner shell.A diaphragm is provided between the cavity inner shell and the cavity outer shell.The motor is connected to the diaphragm through the transmission box.The utility model is mainly used for conveying various fluids.

Description

Technical Field

[0001] This utility model belongs to the field of diaphragm pump technology, and more specifically, it relates to a multi-stroke electric diaphragm pump. Background Technology

[0002] Existing diaphragm pumps mainly use three types of power: compressed air, electric motor, and hydraulic pressure. However, due to technological limitations, existing electric diaphragm pumps can only be made with two chambers. During operation, the fluid pulse is low, and the pumped fluid will fluctuate, resulting in highly unstable fluid delivery. Furthermore, due to the limited number of chambers, the electric motor will experience intermittent stress during operation, which can easily lead to failure of the electric motor transmission mechanism and energy waste.

[0003] For example, Chinese utility model patent CN219012822U discloses a vertical electric diaphragm pump, which is equipped with a silencing base. The silencing base and mounting base are used to install the electric diaphragm pump body in a vertical position. This vertical structure allows the position of the electric diaphragm pump to be adjusted so that the electric diaphragm pump body can be assembled and installed according to the position of the external pipeline. With the tight fit between the transmission plate at the bottom of the mounting base and the silencing base, the vibration is buffered and eliminated by the silencing base with the inner side made of sound-absorbing cotton material, reducing the vibration noise of the electric diaphragm pump body during operation. However, its shortcomings are: because there is still a time difference when the two chambers are working, the output pressure fluctuates greatly, which affects the stability of the delivery and limits the delivery capacity. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a multi-stroke electric diaphragm pump.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A multi-stroke electric diaphragm pump includes an electric motor, a transmission box, and a diaphragm pump housing. The diaphragm pump housing has four cavities with identical structures, each including an inner shell and an outer shell connected to the inner shell. A diaphragm is provided between the inner shell and the outer shell. The electric motor is connected to the diaphragm via the transmission box.

[0007] Preferably, the transmission box includes an eccentric wheel, a transmission shaft A and a transmission shaft B. The motor is connected to the eccentric wheel through an output shaft. The transmission shaft A and the transmission shaft B are mounted on the diaphragm pump housing and arranged in a cross shape. The two ends of the transmission shaft A and the transmission shaft B are respectively connected to the diaphragm.

[0008] Preferably, two follower bearings are installed on both drive shaft A and drive shaft B. When the top of the eccentric wheel rotates toward the cavity, the eccentric wheel pushes the follower bearing to move toward the cavity. The follower bearing and drive shaft A or drive shaft B drive the diaphragm to move toward the outer shell of the cavity.

[0009] Preferably, both ends of the drive shaft A and drive shaft B are equipped with positioning bearings.

[0010] Preferably, one end of each of the four cavities is connected to a feed pipe via a feed check valve, and the other end is connected to a discharge pipe via a discharge check valve.

[0011] Preferably, the feed pipe is provided with a material inlet, and the discharge pipe is provided with a material outlet.

[0012] Preferably, the four cavities include cavity A, cavity B, cavity C and cavity D, with cavity A and cavity C arranged symmetrically, and cavity B and cavity D arranged symmetrically.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By setting up four symmetrically arranged cavities (A, B, C, D) and using an eccentric wheel and cross-drive shaft linkage mechanism, the four cavities alternately perform material suction and discharge operations, realizing four-stroke synchronous operation and greatly improving the material conveying capacity per unit time.

[0015] 2. The four chambers work alternately in a symmetrical distribution, which makes the material output more continuous and stable during the pumping process, effectively reduces pressure pulsation during the conveying process, improves the conveying stability, and is suitable for process occasions with high requirements for conveying stability.

[0016] 3. An electric motor drives an eccentric wheel, which in turn drives multiple diaphragms to move synchronously through a transmission shaft. This ensures efficient conveying while reducing mechanical transmission losses and improving energy utilization, thereby achieving the goal of low energy consumption.

[0017] In summary, this utility model changes the existing 2-stroke to a 4-stroke, improving the operating efficiency at the same speed and power. At the same time, it increases the pulse frequency of the equipment during operation, making the material conveying operation more stable, doubling the conveying efficiency and improving the material conveying stability. In addition, due to the change in the transmission box structure, the transmission box is more adaptable to the reciprocating operation of 4 sets of cavities. Attached Figure Description

[0018] Figure 1 This is the front view of the present invention;

[0019] Figure 2 This is a schematic diagram of the feeding and discharging structure in this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0021] In the diagram: 1. Output shaft; 2. Eccentric wheel; 3. Feed pipe; 4. Drive shaft A; 5. Diaphragm; 6. Cavity shell; 7. Positioning bearing; 8. Transmission box; 9. Cavity inner shell; 10. Drive shaft B; 11. Feed check valve; 12. Discharge check valve; 13. Motor; 14. Diaphragm pump housing; 15. Material inlet; 16. Material outlet; 17. Discharge pipe; 18. Fixing component; 19. Follower bearing. Detailed Implementation

[0022] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

[0023] Example 1:

[0024] like Figure 1-3 As shown, a multi-stroke electric diaphragm pump includes a motor 13, a transmission box 8, and a diaphragm pump housing 14. The diaphragm pump housing 14 has four cavities with the same structure, each including an inner shell 9 and an outer shell 6 connected to the inner shell 9. A diaphragm 5 is provided between the inner shell 9 and the outer shell 6. The motor 13 is connected to the diaphragm 5 through the transmission box 8.

[0025] Example 2:

[0026] A multi-stroke electric diaphragm pump, which differs from Embodiment 1, preferably includes an eccentric wheel 2, a drive shaft A4 and a drive shaft B10. The motor 13 is connected to the eccentric wheel 2 via an output shaft 1. The drive shaft A4 and the drive shaft B10 are mounted on the diaphragm pump housing 14 and arranged in a cross shape. The two ends of the drive shaft A4 and the drive shaft B10 pass through the inner shell 9 of the cavity and are respectively connected to the diaphragm 5.

[0027] Furthermore, two follower bearings 19 are installed on both drive shaft A4 and drive shaft B10. When the top of the eccentric wheel 2 rotates towards the cavity, the eccentric wheel 2 pushes the follower bearings 19 towards the cavity. The follower bearings 19, together with drive shaft A4 or drive shaft B10, drive the diaphragm 5 to move towards the outer shell 6 of the cavity. Specifically, positioning bearings 7 are installed at both ends of drive shaft A4 and drive shaft B10 to ensure that the drive shaft can only perform reciprocating motion. A seal is provided between the positioning bearings 7 and the inner shell 9 of the cavity to seal the material inside the cavity and prevent material leakage. An eccentric wheel 2 is installed at the intersection of drive shaft A4 and drive shaft B10. The eccentric wheel 2 is fixed by the output shaft 1 of the motor 13. When the output shaft 1 of the motor 13 rotates, the eccentric wheel 2 rotates synchronously with the output shaft 1.

[0028] Furthermore, one end of each of the four cavities is connected to a feed pipe 3 via a feed check valve 11, and the feed pipe 3 is provided with a material inlet 15. The other end is connected to a discharge pipe 17 via a discharge check valve 12, and the discharge pipe 17 is provided with a material outlet 16.

[0029] Furthermore, the four cavities include cavity A, cavity B, cavity C, and cavity D, with cavity A and cavity C arranged symmetrically, and cavity B and cavity D arranged symmetrically.

[0030] The working principle of this utility model is as follows:

[0031] Two follower bearings 19 are fixedly installed on both drive shaft A4 and drive shaft B10. When the top of the eccentric wheel 2 rotates towards cavity A, the eccentric wheel 2 pushes the follower bearings 19 towards cavity A. Since the follower bearings 19 are fixed to drive shaft A4 by fixing member 18, the follower bearings 19 and drive shaft A4 drive the diaphragm 5 to move towards the cavity shell 6. At this time, the diaphragm 5 compresses the cavity between the cavity shell 6, and the material inside the cavity is discharged through the discharge check valve 12 and the material outlet 16 on the discharge pipe 17 under pressure. At the same time, the diaphragm 5 moves in the opposite direction to the cavity shell 6 on cavity C, creating a vacuum inside cavity C. The material enters the cavity C through the feed pipe 3 and the feed check valve 11.

[0032] Similarly, when the eccentric wheel 2 rotates towards cavity B, the material inside cavity B is discharged and the material enters cavity D; when the eccentric wheel 2 rotates towards cavity C, the material inside cavity C is discharged and the material enters cavity A; when the eccentric wheel 2 rotates towards cavity D, the material inside cavity D is discharged and the material enters cavity B.

Claims

1. A multi-stroke electric diaphragm pump, characterized in that: The pump includes an electric motor (13), a transmission box (8), and a diaphragm pump housing (14). The diaphragm pump housing (14) has four cavities. The four cavities have the same structure, each including an inner shell (9) and an outer shell (6) connected to the inner shell (9). A diaphragm (5) is provided between the inner shell (9) and the outer shell (6). The electric motor (13) is connected to the diaphragm (5) through the transmission box (8). The transmission box (8) includes an eccentric wheel (2), a transmission shaft A (4) and a transmission shaft B (10). The motor (13) is connected to the eccentric wheel (2) through the output shaft (1). The transmission shaft A (4) and the transmission shaft B (10) are mounted on the diaphragm pump housing (14) and arranged in a cross shape. The two ends of the transmission shaft A (4) and the transmission shaft B (10) are respectively connected to the diaphragm (5). Two follower bearings (19) are installed on both the drive shaft A (4) and the drive shaft B (10). When the top of the eccentric wheel (2) rotates toward the cavity, the eccentric wheel (2) pushes the follower bearing (19) to move toward the cavity. The follower bearing (19) and the drive shaft A (4) or the drive shaft B (10) drive the diaphragm (5) to move toward the cavity shell (6).

2. The multi-stroke electric diaphragm pump according to claim 1, characterized in that: Both ends of the drive shaft A (4) and drive shaft B (10) are equipped with positioning bearings (7).

3. The multi-stroke electric diaphragm pump according to claim 1, characterized in that: One end of each of the four chambers is connected to a feed pipe (3) via a feed check valve (11), and the other end is connected to a discharge pipe (17) via a discharge check valve (12).

4. The multi-stroke electric diaphragm pump according to claim 3, characterized in that: The feed pipe (3) is provided with a material inlet (15), and the discharge pipe (17) is provided with a material outlet (16).

5. The multi-stroke electric diaphragm pump according to any one of claims 1-4, characterized in that: The four cavities include cavity A, cavity B, cavity C, and cavity D. Cavities A and C are arranged symmetrically, and cavities B and D are arranged symmetrically.

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