CN201554628U

CN201554628U - Mechanical diaphragm metering pump

Info

Publication number: CN201554628U
Application number: CN2009202568409U
Authority: CN
Inventors: 陈琳娟
Original assignee: CHANGZHOU JIANGNAN ELECTRICAL EQUIPMENT GROUP CO LTD
Current assignee: CHANGZHOU JIANGNAN ELECTRICAL EQUIPMENT GROUP CO LTD
Priority date: 2009-11-10
Filing date: 2009-11-10
Publication date: 2010-08-18
Anticipated expiration: 2019-11-10

Abstract

A mechanical diaphragm metering pump comprises a pump head, a pump head transitional plate, a pump head seat, a check valve, a diaphragm baffle, a diaphragm, a diaphragm plate, a piston rod, a motor and a box body, wherein, the two ends of the diaphragm are held between the pump head and the pump head transitional plate; the diaphragm baffle and the diaphragm plate are mounted on the two sides of the diaphragm; the diaphragm plate is fixedly connected with the piston rod; a speed reducing mechanism comprising a worm gear, a worm and a worm gear shaft is mounted in the box body; an eccentric shaft is mounted at one end of the worm gear shaft; a bearing is mounted on the eccentric shaft, and can contact and drive the piston rod during the rotation process; a return spring is sleeved on the piston rod; one end of the return spring is propped against the pump head seat, and the other end thereof is propped against the piston rod; a cam close to the piston rod is mounted in the box body and rotatablely supported on the box body; a knob is fixedly connected to the cam and positioned outside the box body; and an indicator scale is mounted on the knob. The utility model with simple structure can regulate flow in a visibility state.

Description

The mechanical type diaphragm metering pump

Technical field

The utility model relates to the mechanical type diaphragm metering pump that a kind of flow can be regulated.

Background technique

The at present domestic metering pump that generally uses mostly is plunger type diaphragm pump or mechanical diaphragm formula metering pump, and plunger type diaphragm pump structure complexity, manufacturing process difficulty are big, and plunger adopts packing seal, poor reliability, and pump leaks easily; Mechanical diaphragm formula metering pump has overcome the deficiency of plunger type diaphragm pump, and its structure comprises the drive part of being made up of worm gear, worm gear box, crank, linkage mechanism; Flow-rate adjustment part by stroke adjustment screw rod, slip crank, feather key, eccentric wheel, stroke scale, stroke locking set of knobs one-tenth; Import and export the hydraulic part that safety check is formed by barrier film baffle plate and the securing diaphragm of diaphragm plate, pump head, the relative plunger type diaphragm pump of this structure possesses that technology is simple, volume is light and handy, do not have and leak, be transferred medium and the isolated advantage of mechanical driving part, but the Flow-rate adjustment in this structure realizes by regulating throw of eccentric, need to increase the complicated throw of eccentric controlling mechanism of a cover, structure is more complicated still.

Summary of the invention

The purpose of this utility model is the defective that overcomes prior art, provide a kind of simple in structure, regulate flow mechanical type diaphragm metering pump easily.

The technological scheme that realizes above-mentioned purpose is: a kind of mechanical type diaphragm metering pump, comprise pump head, the pump head transition plate, the pump head seat, safety check, the barrier film baffle plate, diaphragm, diaphragm plate, piston rod, motor and casing, the two ends of diaphragm are clamped between pump head and the pump head transition plate, barrier film baffle plate and diaphragm plate are installed in the both sides of diaphragm, diaphragm plate is fixedlyed connected with piston rod, the pump head seat is fixedlyed connected with casing, motor is fixed on the casing, worm gear is installed in the casing, the reducing gear that the worm and worm wheel axle is formed, worm-wheel shaft and worm screw all can be rotated to support on the casing, worm screw is fixedlyed connected with the main shaft of motor, the worm and wheel engagement, one end of worm-wheel shaft is an eccentric shaft, and on this eccentric shaft, bearing is installed, and bearing can contact and promote piston rod in rotary course, upper cover of piston rod is equipped with Returnning spring, one end of Returnning spring is against on the pump head seat, the other end is against on the piston rod, near the piston rod place cam is installed in the casing, this cam can be rotated to support on the casing, be fixedly connected with knob on the cam, knob is positioned at the casing outside, and indicator scale also is installed on the knob.

By the copper insert that has been threaded, this copper insert is fixedlyed connected with piston rod by socket head screw on the diaphragm plate.

After adopting technique scheme, only need the rotation adjustment cam, change the piston rod reset position, make mode transfer sheet reciprocal distance change the Flow-rate adjustment that promptly can realize pump.Only used the function of the throw of eccentric controlling mechanism of a cam before just having realized, simplified the metering pump structure greatly, and flow can show by the indicator scale on the knob, so it is very convenient to regulate flow.

Description of drawings

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

Fig. 2 is the A-A cross-sectional schematic of Fig. 1;

Fig. 3 is the partial schematic sectional view of Fig. 1;

Fig. 4 is the main TV structure schematic representation of cam of the present utility model;

Fig. 5 analyses and observe amplification assumption diagram for the C-C of Fig. 4;

Fig. 6 is the I portion structure for amplifying schematic representation of Fig. 4.

Embodiment

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

Shown in Fig. 1～6, a kind of mechanical type diaphragm metering pump, comprise pump head 12, pump head transition plate 13, pump head seat 14, safety check 15, barrier film baffle plate 16, diaphragm 17, diaphragm plate 18, piston rod 7, motor 1 and casing 2, the two ends of diaphragm 17 are clamped between pump head 12 and the pump head transition plate 13, barrier film baffle plate 16 and diaphragm plate 18 are installed in the both sides of diaphragm 17, diaphragm plate 18 is fixedlyed connected with piston rod 7, pump head seat 14 is fixedlyed connected with casing 2, motor 1 is fixed on the casing 2, worm gear 3 is installed in the casing 2, the reducing gear that worm screw 4 and worm-wheel shaft 5 are formed, worm-wheel shaft 5 and worm screw 4 all can be rotated to support on the casing 2, worm screw 4 is fixedlyed connected with the main shaft of motor 1, worm screw 4 and worm gear 3 engagements, one end of worm-wheel shaft 5 is eccentric shaft 5-1, and on this eccentric shaft 5-1, bearing 6 is installed, and bearing 6 can contact and promote piston rod 7 in rotary course, be set with Returnning spring 8 on the piston rod 7, one end of Returnning spring 8 is against on the pump head seat 14, the other end is against on the piston rod 7, near piston rod 7 places cam 9 is installed in the casing 2, this cam 9 can be rotated to support on the casing 2, be fixedly connected with knob 10 by lock screw 11 on the cam 9, knob 10 is positioned at casing 2 outsides, and indicator scale 19 also is installed on the knob 10.

As shown in Figure 2, by the copper insert 20 that has been threaded, this copper insert 20 is fixedlyed connected with piston rod 7 by socket head screw 21 on the diaphragm plate 18.

Working principle of the present utility model is as follows:

Shown in Fig. 1～6, motor 1 slows down power to pass to worm-wheel shaft 5 through worm gear 3, worm screw 4, and the eccentric motion that is produced passes to piston rod 7 by bearing 6, makes piston rod 7 drive diaphragm 17 and travels forward, and piston rod 7 resets under Returnning spring 8 effects.When diaphragm 17 travels forward away from suction port by piston rod 7 drives, pump head 12 internal pressures descend, when the pressure in the pump head 12 is lower than suction pressure, the control ball of suction check valve 15 is open, suction port liquid flows in the pump head 12 by pipeline, when suction process finished, pump head 12 internal pressures equaled the reseat pressure of the control ball in the safety check 15 of suction port.When piston rod 7 travelled forward, diaphragm 17 promoted liquid and travels forward, and pump head 12 internal pressures are raise, pressure is during greater than export pipeline, control ball in the outer pipe upper check valve 15 is open, the flow direction export pipeline in the pump head 12, and pump head 12 is just finished the suction process one time.The Flow-rate adjustment of pump head 12 is the change in location that make cam 9 by rotary knob 10, thereby changes the reset position of piston rod 7, and diaphragm 17 reciprocal distance are changed, thereby changes flow.

The utility model is simple in structure, can carry out the adjusting of flow by indicator scale under visual state.

Claims

1. mechanical type diaphragm metering pump, comprise pump head (12), pump head transition plate (13), pump head seat (14), safety check (15), barrier film baffle plate (16), diaphragm (17), diaphragm plate (18), piston rod (7), motor (1) and casing (2), the two ends of diaphragm (17) are clamped between pump head (12) and the pump head transition plate (13), barrier film baffle plate (16) and diaphragm plate (18) are installed in the both sides of diaphragm (17), diaphragm plate (18) is fixedlyed connected with piston rod (7), pump head seat (14) is fixedlyed connected with casing (2), motor (1) is fixed on the casing (2), worm gear (3) is installed in the casing (2), the reducing gear that worm screw (4) and worm-wheel shaft (5) are formed, worm-wheel shaft (5) and worm screw (4) all can be rotated to support on the casing (2), worm screw (4) is fixedlyed connected with the main shaft of motor (1), worm screw (4) and worm gear (3) engagement, it is characterized in that: an end of worm-wheel shaft (5) is eccentric shaft (5-1), and bearing (6) is installed on this eccentric shaft (5-1), and bearing (6) can contact and promote piston rod (7) in rotary course, be set with Returnning spring (8) on the piston rod (7), one end of Returnning spring (8) is against on the pump head seat (14), the other end is against on the piston rod (7), locate to be equipped with cam (9) near piston rod (7) in the casing (2), this cam (9) can be rotated to support on the casing (2), be fixedly connected with knob (10) on the cam (9), knob (10) is positioned at casing (2) outside, and indicator scale (19) also is installed on the knob (10).

2. mechanical type diaphragm metering pump according to claim 1 is characterized in that: diaphragm plate (18) is gone up by the copper insert that has been threaded (20), and this copper insert (20) is fixedlyed connected with piston rod (7) by socket head screw (21).