CN201443049U

CN201443049U - Mechanical diaphragm metering pump

Info

Publication number: CN201443049U
Application number: CN2008201869796U
Authority: CN
Inventors: 陈琳娟
Original assignee: CHANGZHOU JIANGNAN ELECTRIC POWER ENVIRONMENTAL ENGINEERING Co Ltd
Current assignee: CHANGZHOU JIANGNAN ELECTRIC POWER ENVIRONMENTAL ENGINEERING Co Ltd
Priority date: 2008-09-18
Filing date: 2008-09-18
Publication date: 2010-04-28
Anticipated expiration: 2018-09-18

Abstract

A mechanical diaphragm metering pump comprises a case body, a bearing base, an eccentric shaft, a piston rod, a shaft sleeve, a spring, a pump head base, a diaphragm, a check valve and a pump head. The bearing base is fixed on the case body, the eccentric shaft can be rotationally supported on the bearing base, the head portion of the eccentric shaft is equipped with the bearing, the piston rod is movably arranged inside a hole of the pump head base through the shaft sleeve, the spring is sleeved on the pump head base, one end of the spring is abutted against the pump head base while the other end is abutted against the piston rod, one end of the piston rod is fixedly connected with the diaphragm while the other end contacts with the bearing on the eccentric shaft, the pump head base is fixedly connected with the case body, the outer edge of the diaphragm is pressed and fixed via the pump head and the pump head base, the check valve is arranged on the pump head, the case body is further equipped with a permanent-magnet low-speed synchronous motor, and an output shaft of the permanent-magnet low-speed synchronous motor is directly fixedly connected with the eccentric shaft.

Description

The mechanical type diaphragm metering pump

Technical field

The utility model relates to a kind of mechanical type diaphragm metering pump.

Background technology

Measuring pump is widely used in industrial departments such as chemical industry, oil refining, food, medicine, electric power, environmental protection, water treatment, quantitatively carries various inflammable, explosive, poisonous, corrosion or non-corrosive special media.Measuring pump generally is grouped into by running part, eccentric adjusting part and flow passage, the eccentric adjusting part is made up of adjustment cam, piston rod and spring, the overcurrent part is made up of diaphragm, pump head and import and export flap valve, running part of the prior art is made up of high-speed electric expreess locomotive and reduction box, need travelling gear, in operation process, need to add lubrication oil, sometimes can have the phenomenon of leakage of oil.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of simple in structure, and can avoid the mechanical type diaphragm metering pump of oil leakage phenomenon.

The technical scheme that realizes above-mentioned purpose is: a kind of mechanical type diaphragm metering pump, comprise casing, bearing support, eccentric shaft, piston rod, axle sleeve, spring, the pump head seat, diaphragm, flap valve and pump head, bearing support is fixed on the casing, eccentric shaft can be rotated to support on the bearing support, and the head of eccentric rod is equipped with bearing (15) piston rod and is installed in movably in the pump head seat hole by axle sleeve, spring housing is contained on the pump head seat, and an end of spring is against on the pump head seat, the other end is against on the piston rod, piston rod one end is fixedlyed connected with diaphragm, the other end can contact with the bearing on the eccentric shaft, the pump head seat is fixedlyed connected with casing, outer cause pump head of diaphragm and pump head seat are fixed, flap valve is installed on the pump head, permanent magnet low speed synchronous motor also is installed on the casing, and the output shaft of this permanent magnet low speed synchronous motor is directly fixedlyed connected with eccentric shaft.

Further, adjustment cam and adjusting knob are installed also on the casing, adjustment cam is fixedlyed connected by lock-screw with adjusting knob (18), and adjustment cam can contact with piston rod.

After adopting technique scheme, the output shaft of permanent magnet low speed synchronous motor is directly fixedlyed connected with eccentric shaft, no longer need reduction box and travelling gear, simplify the structure, improved transmission efficiency, as long as lubricating grease is arranged in the use, need not to add again lubrication oil, thereby also just avoided oil leakage phenomenon in order to lubricated travelling gear.

Description of drawings

Fig. 1 is a main TV structure schematic diagram of the present utility model;

Fig. 2 is the schematic top plan view of Fig. 1.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

As Fig. 1, shown in 2, a kind of mechanical type diaphragm metering pump, comprise casing 8, bearing support 13, eccentric shaft 14, piston rod 2, axle sleeve 3, spring 11, pump head seat 4, diaphragm 5, flap valve 1 and pump head 20, bearing support 13 is fixed on the casing 8, eccentric shaft 14 can be rotated to support on the bearing support 13, and the head of eccentric rod is equipped with bearing 15, piston rod 2 is installed in pump head seat 4 holes movably by axle sleeve 3, spring 11 is sleeved on the pump head seat 4, and an end of spring 11 is against on the pump head seat 4, the other end is against on the piston rod 2, piston rod 2 one ends are fixedlyed connected with diaphragm 5, the other end can contact with the bearing 15 on the eccentric shaft 14, pump head seat 4 is fixedlyed connected with casing 8, diaphragm 5 outer cause pump heads 20 and pump head seat 4 are fixed, flap valve 1 is installed on the pump head 20, and permanent magnet low speed synchronous motor 12 also is installed on the casing 8, and the output shaft of this permanent magnet low speed synchronous motor 12 is directly fixedlyed connected with eccentric shaft 14.The upper end of casing 8 is provided with upper cover plate 10.

As shown in Figure 2, adjustment cam 16 and adjusting knob 18 are installed also on the casing 8, adjustment cam 16 is fixedlyed connected by lock-screw 19 with adjusting knob 18, and adjustment cam 16 can contact with piston rod 2.Can rotate adjustment cam 16 by adjusting knob 18, changing the position that piston rod 2 resets, thereby change the reciprocating stroke size of diaphragm 5, reach the purpose that changes flow.The adjusting knob 18 rising flows that turn clockwise are rotated counterclockwise adjusting knob 18 and reduce flows, adjustable range 0～100%.When adjusting knob 18 transferred to the flow of setting, it was loosening to prevent in motion process to screw lock-screw 19.Readjust as need, should unclamp lock-screw 19 earlier, and then operation adjusting knob 18.

Operating principle of the present utility model is as follows: permanent magnet low speed synchronous motor 12 drives eccentric shaft 14 rotations, the eccentric motion that produces passes to piston rod 2 by bearing 15, the active force that makes piston rod 2 overcome spring 11 drives diaphragm 5 and travels forward, and piston rod 2 resets under the effect of spring 11.When diaphragm 5 during away from intake, pump head 20 internal pressures descend, when the pump head internal pressure is lower than suction pressure, the control ball of suction check valve 1 is open, intake liquid flows in the pump head 20, and when suction process finished, pump head 20 internal pressures equaled intake control ball reseat pressure.When piston rod 2 travelled forward, diaphragm 5 promoted to travel forward, and pump head 20 internal pressures are raise, and pressure is during greater than export pipeline, and the control ball of outlet upper check valve 1 is open, flow direction export pipelines in the pump head 20, and pump head is just finished the suction process one time.

Claims

1. mechanical type diaphragm metering pump, comprise casing (8), bearing support (13), eccentric shaft (14), piston rod (2), axle sleeve (3), spring (11), pump head seat (4), diaphragm (5), flap valve (1) and pump head (20), bearing support (13) is fixed on the casing (8), eccentric shaft (14) can be rotated to support on the bearing support (13), and the head of eccentric rod is equipped with bearing (15), piston rod (2) is installed in pump head seat (4) hole movably by axle sleeve (3), spring (11) is sleeved on the pump head seat (4), and an end of spring (11) is against on the pump head seat (4), the other end is against on the piston rod (2), piston rod (2) one ends are fixedlyed connected with diaphragm (5), the other end can contact with the bearing (15) on the eccentric shaft (14), pump head seat (4) is fixedlyed connected with casing (8), outer cause pump head of diaphragm (5) (20) and pump head seat (4) are fixed, flap valve (1) is installed on the pump head (20), it is characterized in that: permanent magnet low speed synchronous motor (12) also is installed on the casing (8), and the output shaft of this permanent magnet low speed synchronous motor (12) is directly fixedlyed connected with eccentric shaft (14).

2. mechanical type diaphragm metering pump according to claim 1, it is characterized in that: adjustment cam (16) and adjusting knob (18) also are installed on the casing (8), adjustment cam (16) is fixedlyed connected by lock-screw (19) with adjusting knob (18), and adjustment cam (16) can contact with piston rod (2).