CN2229548Y

CN2229548Y - Reciprocating self-priming pump

Info

Publication number: CN2229548Y
Application number: CN 94246552
Authority: CN
Inventors: 姜培木
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-07
Filing date: 1994-12-07
Publication date: 1996-06-19
Anticipated expiration: 2004-12-07

Abstract

The utility model provides a reciprocating self-priming pump, comprising a cylinder and a piston. A stop reverse valve gate is arranged in a hole which is opened in one end near a front cavity chamber of the cylinder, and a suction pipe is connected with one side outside the cylinder. Another stop reverse valve is arranged in a hole which is opened in the piston along the axial direction of the cylinder. A closure assist elastic element arranged on a check valve gate of the cylinder and a check valve of the piston can close the valve gate in time to obtain high vacuum degree inside the cylinder when the pressure differences of the both sides of the closure assist elastic element transit from the positive to the inverse. The flow direction of the liquid in the cylinder is basically consistent to the stress direction thereof, so the resistance of the fluid flow is reduced, and higher delivery lift is obtained.

Description

Reciprocating type self-priming pump

The utility model relates to a kind of liquid conveying machinery, especially a kind of reciprocating pump.

There are a lot of local level of ground water very low in the vast rural area of China, cause big difficulty to irrigation by pumping, in order to address this problem, following method at present commonly used: the one, adopt unsettled pump, being about to water pump is put into down-hole one segment distance and fixes, make pump intake satisfy the requirement of pump proper functioning to the distance of liquid level, cause like this pump installation, use trouble; Another is to adopt submersible pump, but because of many regional power supply voltage instabilities, submersible pump is cisco unity malfunction often, and so easy break-down, and inconvenient maintenance are the lost of life.And everything is all because of the restriction of the suction head of pump.

The purpose of this utility model provides a kind of higher vacuum height that sucts that has, and can produce more high-lift reciprocating pump.

The purpose of this utility model is achieved in that reciprocating type self-priming pump comprises a cylinder body and a piston, piston is divided into separate front chamber and rear chamber with cylinder body, one end perforate of the forward chamber of cylinder body and at Kong Shangshe one check valve, the outer corresponding set check valve place of described cylinder connects suction pipe; The also perforate and at Kong Shangshe one check valve of piston upper edge cylinder body axial direction, an end perforate and the discharge tube of cylinder body rear chamber link.All be equipped with to help on the cylinder body and on the check valve on the piston and close elastic element.

Piston by retarder and connecting rod under driven by motor, to-and-fro motion in cylinder body, when an end motion of piston set check valve on deviating from cylinder body, front chamber's volume increases, and pressure reduces, under the differential pressure action between front chamber and the suction pipe, check valve on the cylinder body overcomes elastic force and opens, meanwhile, the check valve closure on the piston, liquid enters front chamber; Cylinder body front chamber volume reduces when piston moves round about, pressure raises, rear chamber's volume increases, pressure reduces, under the effect of front/back cavity chamber pressure difference, check valve on the piston overcomes elastic force to be opened, and liquid is forced into rear chamber from front chamber, discharges cylinder body by discharge tube then, simultaneously the check valve on the cylinder body is closed rapidly under the effect of the pressure reduction of front chamber and suction line and elastic force.So go round and begin again, liquid is sucked cylinder body continually and is transferred out.

Helping of being equipped with in check valve on the cylinder body and the check valve on the piston close elastic element can guarantee when its both sides pressure reduction by just to decelerating transition the time, in time throttle down makes to obtain high as far as possible degree of vacuum in the cylinder body, thereby improves the vacuum height that sucts of pump.

Described elastic element can be spring.

For bigger and uniform carrying capacity is provided, two above-mentioned reciprocating pumps can be together in parallel, promptly the suction pipe of two cylinder bodies and discharge tube are respectively and connect, concourse at discharge tube is provided with a selector valve, to prevent liquid dispersion between two cylinders, reduce carrying capacity and mechanical efficiency, described selector valve can be swing check valve.

The reciprocating pump that the utility model provides, adopt rational structure, the vacuum height that sucts of pump is improved, and the flow direction of liquid in cylinder body is subjected to the force direction basically identical with it, fluid flow resistance reduces, can obtain higher lift, use the arid area, vast rural area that is suitable for low water level.

The utility model is described in further detail below by drawings and Examples:

Fig. 1: the reciprocating type self-priming pump structural representation of the single cylinder that the utility model provides;

Fig. 2: the twin-cylinder reciprocating self-priming pump structural representation that the utility model provides;

The A-A sectional view of Fig. 3: Fig. 2.

Embodiment 1:

As shown in Figure 1, reciprocating type self-priming pump comprises cylinder body 1 and piston 2, piston comprises piston rod 21, piston holder 1, piston holder 2 23, piston holder one is the taper barrel support of a with cover and chimb, at the bottom of it and solid rod joint, it has covered a hole, barrel is provided with hole, piston holder two is the round basin shape support of a band chimb, also porose at the bottom of the basin, piston holder one and piston holder two are spirally connected by bolt, intrinsic rubber system piston ring 24 between the chimb of two stands, there is a pin-and-hole 211 end of piston rod, establish a bearing pin 212 in the pin-and-hole, one end of bearing pin is shaped on a boss 2121, at the solid rubber valve pad 2122 in the exterior edge face of boss, wear a spring 213 on the bearing pin 212, the two ends of spring are against respectively on the end face of boss 2121 and piston rod 21, pin-and-hole length on the piston rod allows bearing pin that one stroke is arranged within it, when piston pressure at both sides balance or rear chamber's pressure during greater than front chamber's pressure, under the effect of the elastic force that is compressed spring or elastic force and pressure reduction, valve pad 2122 is pressed on the hole on piston holder one cover, before inciting somebody to action, rear chamber separates, current chamber pressure is during greater than rear chamber, and valve pad is open, and two chambers are linked up.

Establish the hole at front chamber's one end of cylinder body 1 and connect suction pipe, establish the hole at rear chamber's one end of cylinder body and connect discharge tube, at Kong Shangshe one check valve 11 that connects suction pipe, it comprises a valve rod 111, valve pad dunnage 112 and valve pad 113, beat screw on the valve pad dunnage and screw in valve rod, the valve pad dunnage is threaded to valve rod one end, fix by the valve rod end cap, penetrate on the valve rod with its valve pad that drive fit hole arranged to till the valve pad dunnage contacts, the valve rod that is installed with valve pad dunnage and valve pad is inserted the hole that is connected suction pipe in cylinder body, valve pad and inboard wall of cylinder block face form sealing surface, pass the stem guiding frame 114 that is installed on the suction pipe inwall again, a spring-support plate 1111 is established in the end of valve rod, it can slide on valve rod, set firmly a locating stud in the end of valve rod, axially limit spring-support plate, on valve rod, wear a spring 115, the two ends of spring are against respectively on the end face of spring-support plate and stem guiding frame, when check valve 11 pressure at both sides balances or in-cylinder pressure during, be compressed the elastic force of spring greater than the suction pipe internal pressure.Or under the effect of elastic force and pressure reduction, valve pad 113 is pressed on the inboard wall of cylinder block, and cylinder body and suction pipe separate, and when the pressure of suction pipe during greater than in-cylinder pressure, valve pad is open, and suction pipe and cylinder body are linked up, and the liquid in the suction pipe flows into cylinder body.

Embodiment 2:

As shown in Figure 2, by being associated to the twin-cylinder reciprocating self-priming pump as embodiment's 1 described cylinder body, piston two covers, the suction pipe and the discharge tube that are about to two described cylinder bodies connect together respectively, the relative phase difference 180 of two described pistons in two described cylinder bodies, under the drive of connecting rod, a wherein cylinder imbibition, another cylinder discharge opeing, concourse at the discharge tube of two cylinders is established a swing check valve 3, to avoid liquid back mixing in two cylinder bodies.

Claims

1, a kind of reciprocating type self-priming pump, comprise a cylinder body and a piston, piston is divided into separate front chamber and rear chamber with cylinder body, it is characterized in that: an end perforate of the forward chamber of cylinder body and at Kong Shangshe one check valve, the outer corresponding set check valve place of described cylinder connects suction pipe, the also perforate and at Kong Shangshe one check valve of piston upper edge cylinder body axial direction, an end perforate and the discharge tube of cylinder body rear chamber link.

2, reciprocating type self-priming pump according to claim 1 is characterized in that: be equipped with to help in check valve on described cylinder body and the check valve on the piston and close elastic element.

3, reciprocating type self-priming pump according to claim 2, it is characterized in that: described elastic element can be spring.

4, reciprocating type self-priming pump according to claim 1, it is characterized in that: the suction pipe and the discharge tube of two described cylinder bodies are connected together respectively, the relative phase difference 180 of two described pistons in two described cylinder bodies is established a selector valve at the concourse of the discharge tube of two cylinders.

5, reciprocating type self-priming pump according to claim 4 is characterized in that: described selector valve is a swing check valve.