CN203272083U - Three-cavity electric diaphragm pump - Google Patents

Abstract

The utility model provides a diaphragm pump, particularly a three-cavity electric diaphragm pump. The three-cavity electric diaphragm pump consists of a motor, a pump base, a valve body diaphragm, a valve seat, a pump head, an O-shaped ring, a back-pressure valve core, a spring, a back-pressure valve cover, a pressure diaphragm and a pressure switch which are in sequential connection, wherein a diaphragm covering edge is arranged outside the valve body diaphragm; an inside waterproof inclined plane is formed on the inner side of the pump head; the diaphragm covering edge is pressed to the bottom of the inside waterproof inclined plane, so that liquid in the pump can not overflow; a seal ring is arranged on each cavity in the valve body diaphragm and embedded into a sealing groove; a sealing rubber strip is arranged on the inner side of each sealing groove and pressed into the valve body diaphragm; an outside waterproof inclined plane is formed on a back-pressure valve core seat, and the O-shaped ring on the back-pressure valve core is propped against the outside waterproof inclined plane; the spring is arranged between the back-pressure valve core and the back-pressure valve cover, the pressure diaphragm is mounted on the back-pressure valve cover, and the pressure switch is pressed on the pressure diaphragm. The three-cavity electric diaphragm pump has the advantages of simple structure, easiness in manufacture, low cost, good leak tightness and stability in operation and solves the problem that parts in the water pump are crushed by external pressure.

Description

Three chamber electric diaphragm pumps

Technical field

The utility model is a kind of diaphragm pump, particularly a kind of three chamber electric diaphragm pumps.

Background technique

The dc diaphragm pump is widely used in the water system of car and boat, the dc diaphragm pump is that the rotation by motor drives transmission device, make diaphragm produce transmission in the form of piston, the transmission by diaphragm piston type comes the volume in the compressed septum chamber to realize the function of extracting liquid.

Traditional dc diaphragm pump, complex structure, sealing is poor, and rate of fault is high, and working life is short, also the situation that the pump pressure outside is damaged the water pump inner body by pressure can occur.

Summary of the invention

The purpose of this utility model is the defective of damaging by pressure in order to overcome the poor part of the complicated sealing of existing dc diaphragm pump structure, invents a kind of three chamber electric diaphragm pumps with folded-edge diaphragm seal structure and spring back-pressure valve structure.

The purpose of this utility model realizes as follows: described three chamber electric diaphragm pumps, be connected in sequence by motor, pump seat, valve body diaphragm, valve seat, pump head, O shape circle, back pressure spool, spring, back pressure valve gap, pressure-sensitive diaphragm and pressure switch, pump seat is fixed on motor, pump head is fixed on pump seat, pressure switch is fixed on pump head, it is characterized in that:

The outside of valve body diaphragm is provided with the diaphragm bound edge, and valve seat is packed into and it can be encased after the valve body diaphragm; The inboard of pump head is provided with inboard waterproof inclined-plane, is located between pump head and pump seat after valve body diaphragm and valve seat assemble, and at this moment the diaphragm bound edge is pressed into bottom, inboard waterproof inclined-plane, makes the liquid in pump can be not excessive; Three cavitys are established in valve body diaphragm inside, and cavity is provided with seal ring, and seal ring is bumped on valve seat in corresponding seal groove, make it form first sealing; The seal groove inboard is provided with sealing joint strip, and sealing joint strip will be pressed in the valve body diaphragm, forms the second sealing;

The outside of pump head is provided with the pressure storehouse, and pressure is provided with the back-pressure valve core print seat in the storehouse, and the back-pressure valve core print seat is provided with waterproof inclined-plane, the outside; The back pressure spool is provided with the groove position, and O shape circle is located on the groove position; The back pressure spool is packed in the back-pressure valve core print seat, makes O shape circle top form sealing to waterproof inclined-plane, the outside; The back pressure spool is provided with directional post, and back-pressure valve covers and is provided with guide pipe, and spring is located on directional post, and directional post inserts in guide pipe; Back-pressure valve covers pressure-sensitive diaphragm is housed, and pressure switch is pressed on pressure-sensitive diaphragm.

Good effect of the present utility model is as follows: the utility model has overcome the complicated difficult problem of easily leaking of existing diaphragm pump assembling, it is simple and reasonable, easy to manufacture, cost is low, good airproof performance can guarantee the dc diaphragm pump in the situation that high negative pressure is normal, working stability, solved because of the pump pressure outside the problem that the water pump inner body damages by pressure, improved the operating life of dc diaphragm pump.

Description of drawings

Fig. 1 is the utility model ssembly drawing.

Fig. 2 is valve body diaphragm structure figure.

Fig. 3 is pump head inside structure figure.

Fig. 4 is valve seat construction figure.

Fig. 5 is pump head outboard structure figure.

Fig. 6 is back-pressure valve cored structure figure.

Fig. 7 is the pressure-sensitive diaphragm structural drawing.

In figure: 1 motor 2 pump seat 3 valve body diaphragms

4 valve seat 5 pump head 6 O shape circles

7 back pressure spool 8 spring 9 back pressure valve gaps

10 pressure-sensitive diaphragm 11 pressure switch 12 diaphragm bound edges

13 inboard waterproof inclined-plane 14 cavity 15 seal rings

16 seal groove 17 sealing joint strip 18 pressure storehouses

19 21 groove positions, back-pressure valve core print seat 20 waterproof inclined-planes, the outside

22 directional post 23 guide pipes.

Embodiment:

As shown in Figure 1, described three chamber electric diaphragm pumps, be connected in sequence by motor 1, pump seat 2, valve body diaphragm 3, valve seat 4, pump head 5, O shape circle 6, back pressure spool 7, spring 8, back pressure valve gap 9, pressure-sensitive diaphragm 10 and pressure switch 11, pump seat 2 is fixed on motor 1, pump head 5 is fixed on pump seat 2, pressure switch 11 is fixed on pump head 5, it is characterized in that:

The outside of valve body diaphragm 3 is provided with diaphragm bound edge 12(and sees Fig. 2), valve seat 4 is packed into and it can be encased after valve body diaphragm 3; The inboard of pump head 5 is provided with inboard waterproof inclined-plane 13(and sees Fig. 3), after assembling, valve body diaphragm 3 and valve seat 4 be located between pump head 5 and pump seat 2, and at this moment diaphragm bound edge 12 is pressed into 13 bottoms, inboard waterproof inclined-plane, makes the liquid in pump can be not excessive; Three cavitys 14 are established in valve body diaphragm 3 inside, and cavity 14 is provided with seal ring 15, and seal ring 15 is bumped into the corresponding interior (see figure 4) of seal groove 16 on valve seat 4, make it form the first sealing; Seal groove 16 inboards are provided with sealing joint strip 17, and sealing joint strip 17 will be pressed in valve body diaphragm 3, form the second sealing;

The outside of pump head 5 is provided with pressure storehouse 18(and sees Fig. 5), be provided with back-pressure valve core print seat 19 in pressure storehouse 18, back-pressure valve core print seat 19 is provided with waterproof inclined-plane, the outside 20; Back pressure spool 7 is provided with groove position 21(and sees Fig. 6), O shape circle 6 is located on groove position 21; Back pressure spool 7 is packed in back-pressure valve core print seat 19, makes O shape circle 6 tops form sealing to waterproof inclined-plane, the outside 20; Back pressure spool 7 is provided with directional post 22, and back pressure valve gap 9 is provided with guide pipe 23(and sees Fig. 6), spring 8 is located on directional post 22, and directional post 22 inserts in guide pipe 23; Pressure-sensitive diaphragm 10 is housed on back pressure valve gap 9, and pressure switch 11 is pressed on pressure-sensitive diaphragm 10.

Working principle of the present utility model is: valve body diaphragm outside is provided with the diaphragm bound edge, and the inboard of pump head is provided with inboard waterproof inclined-plane, and the diaphragm bound edge is pressed into bottom, inboard waterproof inclined-plane, makes the liquid in pump can be not excessive; Valve body diaphragm internal cavity is provided with seal ring, and seal ring is bumped into and forms the first sealing in seal groove; The seal groove inboard is provided with sealing joint strip, and sealing joint strip will be pressed into and form the second sealing in the valve body diaphragm, and above seal approach solves a difficult problem of easily leaking thoroughly.When pump working, hydraulic pressure can back down the back pressure spool, and water can be discharged in water pump smoothly; When water pump quit work, spring pressure can push up back the back pressure spool on the back pressure valve seat of pump head, and such structure can not make because the water in pipeline is pushed back water pump its inner member damage, and has improved the operating life of water pump.

Claims (1)

1. chamber electric diaphragm pump, be connected in sequence by motor, pump seat, valve body diaphragm, valve seat, pump head, O shape circle, back pressure spool, spring, back pressure valve gap, pressure-sensitive diaphragm and pressure switch, pump seat is fixed on motor, pump head is fixed on pump seat, pressure switch is fixed on pump head, it is characterized in that:

The outside of valve body diaphragm is provided with the diaphragm bound edge, and valve seat is packed into and it can be encased after the valve body diaphragm; The inboard of pump head is provided with inboard waterproof inclined-plane, is located between pump head and pump seat after valve body diaphragm and valve seat assemble, and at this moment the diaphragm bound edge is pressed into bottom, inboard waterproof inclined-plane, makes the liquid in pump can be not excessive; Three cavitys are established in valve body diaphragm inside, and cavity is provided with seal ring, and seal ring is bumped on valve seat in corresponding seal groove, make it form first sealing; The seal groove inboard is provided with sealing joint strip, and sealing joint strip will be pressed in the valve body diaphragm, forms the second sealing;

The outside of pump head is provided with the pressure storehouse, and pressure is provided with the back-pressure valve core print seat in the storehouse, and the back-pressure valve core print seat is provided with waterproof inclined-plane, the outside; The back pressure spool is provided with the groove position, and O shape circle is located on the groove position; The back pressure spool is packed in the back-pressure valve core print seat, makes O shape circle top form sealing to waterproof inclined-plane, the outside; The back pressure spool is provided with directional post, and back-pressure valve covers and is provided with guide pipe, and spring is located on directional post, and directional post inserts in guide pipe; Back-pressure valve covers pressure-sensitive diaphragm is housed, and pressure switch is pressed on pressure-sensitive diaphragm.

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