CN201407154Y - Hydraulic metering pump flow adjustment mechanism - Google Patents

Abstract

A flow regulating mechanism of a hydraulic metering pump, comprising a box body 4, a piston 5 and an adjustment rod 8 are disposed in the box body 4, one end of the adjustment rod 8 is inserted into the center hole at the end of the piston 5, the piston 5 and the adjustment rod 8, The gap between the piston 5 and the box 4 is matched, and the other end of the adjustment rod 8 is equipped with an adjustment sleeve 2, and the pulsation of the hydraulic oil in the high-pressure chamber is realized by using the blocking relationship between the adjustment rod 8, the piston 5 and the oil supply passage 6 Impact, and then control the inlet and outlet flow of the hydraulic diaphragm metering pump. It has a simple structure and good processing technology. It eliminates the phenomenon of worm gear and worm drive, fever and frequent jamming. The characteristics of high effect.

Description

Hydraulic metering pump duty controlling mechanism

Technical field

The utility model relates to a kind of flow control device, particularly a kind of hydraulic metering pump duty controlling mechanism.

Background technique

Metering pump is a kind of as the reciprocating pump class, and it is a kind of reciprocating pump that can regulate the conveying fluid flow.Its characteristic curve seldom is subjected to the influence of the disturbing factors such as other physical property of temperature, viscosity and liquid, flow is accurately adjustable, the operational efficiency height, absorbability are good, characteristics such as wide accommodation, be that the important corollary equipment that improves the quality of products is produced in modernization continuously, in departments such as oil, metallurgy, electric power, military project, be extensive use of.The regulative mode of present domestic metering pump mainly contains the N axle and regulates and the chute type regulative mode.But N axle controlling mechanism since structure shape complexity, technology capability poor, be easy to generate stress and shortcoming such as concentrate, make the processing of this metering pump and usability reduce greatly; The slip of straight pin in skewed slot on the skewed slot axle in the chute type regulative mode is jerky, often ruptures, and brings the quite serious fever phenomenon of whole metering pump.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of hydraulic metering pump duty controlling mechanism is provided, have that structure shape is simple, technology capability good, stopped that the worm and gear transmission is painstaking, fever and frequent stuck phenomenon, make driving mechanism become light, smooth; Can not bring air into, repairing in time, efficiently; Linear effects is good.

In order to achieve the above object, the technical solution adopted in the utility model is: hydraulic metering pump duty controlling mechanism, comprise casing 4, dispose piston 5 and adjustable lever 8 in the casing 4, one end of adjustable lever 8 is inserted in the center hole the inside of piston 5 ends, piston 5 and adjustable lever 8, be Spielpassung between piston 5 and the casing 4, dispose adjustment sleeve 2 on the other end of adjustable lever 8, pressure cap 3 is fixed on adjustment sleeve 2 on the casing 4, dispose regulating handle 1 on the adjustment sleeve 2, barrier film 10 is fixed on the casing 4, and barrier film 10 inboards have repairing path 6 and fuel-displaced path 9, have draining hole 7 on the piston 5, repairing path 6 and draining hole 7 all are connected with fuel-displaced path 9.

Adopt seal ring to add sealing gasket between adjustable lever 8 and the adjustment sleeve 2 and seal, adopt the seal ring sealing between adjustment sleeve 2 and the casing 4.

The hydraulic oil of sealing is by the inboard of fuel-displaced path 9 arrival barrier films 10, and presses against diaphragm 10 is done work.

Traditional Hydraulic Diaphragm Metering Pump regulative mode is length of stroke, the stroke frequency that changes piston, and N shaft type and skewed slot axle regulative mode all belong to this regulative mode; The utility model design breaks through conventional thought, by the cooperation of adjustable lever 8 and piston 5 center holes, controls the volume of the hydraulic oil that is used for doing work effectively, and then reaches the purpose of flow control; This controlling mechanism has whole advantages of N axle and the adjusting of skewed slot axle.

Since adopted the technical solution adopted in the utility model, so also have the following advantages:

Even 1, repairing path 6 has guaranteed when oil mass is less on the casing, can not bring air in the working procedure yet, repairing is in time, efficiently.

2, this controlling mechanism makes the diaphragm pump flow have excellent linear relationship, with respect to changing the regulative mode that length of stroke changes the hydraulic oil volume indirectly, and the hydraulic oil volume that this direct control is used for doing work, what linear effects will be good is many.

3, remove conventional adjustment mechanisms and be attached to numerous and diverse yoke on the worm and gear, stopped that the worm and gear transmission is painstaking, fever and frequent stuck phenomenon, made the driving mechanism to become light, smooth.

Description of drawings

Fig. 1 is structure master's sectional view of the present utility model.

Fig. 2 is the structure of the present utility model sectional view of bowing.

Fig. 3 is the utility model controlling mechanism master cutaway view Amplified image.

Fig. 4 is the utility model controlling mechanism cutaway view Amplified image of bowing.

Embodiment

Below in conjunction with accompanying drawing structural principle of the present utility model and working principle are elaborated.

With reference to Fig. 1, Fig. 2, hydraulic metering pump duty controlling mechanism, comprise casing 4, dispose piston 5 and adjustable lever 8 in the casing 4, one end of adjustable lever 8 is inserted in the center hole the inside of piston 5 ends, piston 5 and adjustable lever 8, be Spielpassung between piston 5 and the casing 4, dispose adjustment sleeve 2 on the other end of adjustable lever 8, pressure cap 3 is fixed on adjustment sleeve 2 on the casing 4, dispose regulating handle 1 on the adjustment sleeve 2, barrier film 10 is fixed on the casing 4, and barrier film 10 inboards have repairing path 6 and fuel-displaced path 9, have draining hole 7 on the piston 5, repairing path 6 and draining hole 7 all are connected with fuel-displaced path 9.

Working principle of the present utility model is:

When adjustable lever 8 is threaded to 100% stroke and maintains static, push away before the piston 5, therefore hydraulic oil is compressed that pressure begins to increase, and part fluid can leak in the casing 4 through the draining hole 7 of the repairing path 6 of casing 4 and piston 5 self.Piston 5 moves on after it and the whole shutoff of casing 4 oil circuits, this moment, fluid can only flow back to casing 4 from the draining hole 7 on the piston 5, when piston 5 continue again to move ahead until adjustable lever 8 draining hole 7 shutoff on the piston 5 on after, the hydraulic fluid pressure of being sealed by piston 5, adjustable lever 8 and adjustment sleeve 2 begins to raise, enter into and promote barrier film 10 actings in the pump head assembly, the fed sheet of a media that sucks pump head is extruded go.Piston 5 arrives and begins foremost to retreat, high pressure oil begins pressure release, because piston 5 movement velocitys are than very fast, in the pressure chamber that piston 5, adjustable lever 8 and adjustment sleeve 2 form, can form certain degree of vacuum again, barrier film 10 is replied to the topic again at the opposite side of pump head, fed sheet of a media is inhaled into the pump head the inside again, and so circulation has realized that the continuity of flow sucks and discharges.

When being threaded to 50% stroke outside the adjustable lever 8, the moment in adjustable lever 8 shutoff draining holes 7 produces than 100% stroke and lags behind, hydraulic oil is via the time lengthening of piston center hole backflow casing 4, be used for promoting the hydraulic oil minimizing of barrier film 10 actings, barrier film 10 amount of deformation reduce, and the flow and the pressure that show as diaphragm pump reduce.The volume of the pressure chamber that piston 5, adjustable lever 8 and adjustment sleeve 1 form is V, then has

$V=\frac{\mathrm{\π}(D^2-d^2)}{4}\·L$ Formula (1)

D------piston diameter mm in the formula;

D------adjustable lever diameter mm;

L------piston expansion stroke mm;

As seen, the volume V that is used for promoting the hydraulic oil of barrier film 10 actings at last is the linear function of expansion stroke section L, and L is big more, and the moment in adjustable lever 8 shutoff pistons 5 draining holes is forward more, and the hydraulic oil volume that is used for doing work is just big more, and the rate of discharge of diaphragm pump is big more.In view of the above, when adjustable lever 8 was fixed on stroke 50%, the hydraulic oil volume that does work in the piston 5 to-and-fro motion processes was maximum constantly half all the time, and promptly the diaphragm pump rate of discharge is 1/2 of peak rate of flow now.When adjustable lever 8 is fixed on scale when being zero, in the piston 5 whole reciprocal processes, adjustable lever 8 just can not shutoff draining hole 7, does not have this moment compressed fluid to promote barrier film 10 actings, so flow is zero.In like manner, other stroke mark corresponding flow value can be calculated according to formula (1) and draw.In the running of diaphragm pump,, change the flow of diaphragm pump like this, reach the purpose that metering is carried by regulating the stroke percentage of adjustable lever 8.

Since adopted the technical solution adopted in the utility model, so also have the following advantages:

Even 1, repairing path 6 has guaranteed when oil mass is less on the casing, in the course of work also Can not bring air into, repairing in time, efficiently.

2, this governor motion is so that the membrane pump flow has excellent linear relationship, with respect to changing punching Cheng Changdu changes the regulative mode of hydraulic oil volume indirectly, and this direct control is used for The hydraulic oil volume of acting, what linear effects will be good is many.

3, remove conventional adjustment mechanisms and be attached to numerous and diverse yoke on the worm and gear, stopped worm gear Worm-drive is painstaking, fever and frequent stuck phenomenon, so that transmission mechanism becomes easily, Smooth.

Claims (4)

1. hydraulic metering pump duty controlling mechanism, comprise casing (4), it is characterized in that: dispose piston (5) and adjustable lever (8) in the casing (4), one end of adjustable lever (8) is inserted in the center hole the inside of piston (5) end, dispose adjustment sleeve (2) on the other end of adjustable lever (8), pressure cap (3) is fixed on adjustment sleeve (2) on the casing (4), dispose regulating handle (1) on the adjustment sleeve (2), barrier film (10) is fixed on the casing (4), barrier film (10) inboard has repairing path (6) and fuel-displaced path (9), have draining hole (7) on the piston (5), repairing path (6) and draining hole (7) all are connected with fuel-displaced path (9).

2. a kind of hydraulic metering pump duty controlling mechanism as claimed in claim 1 is characterized in that: adopt seal ring to add sealing gasket between adjustable lever (8) and the adjustment sleeve (2) and seal, adopt the seal ring sealing between adjustment sleeve (2) and the casing (4).

3. a kind of hydraulic metering pump duty controlling mechanism as claimed in claim 1 or 2 is characterized in that: the hydraulic oil of sealing is by the inboard of fuel-displaced path (9) arrival barrier film (10), and presses against diaphragm (10) is done work.

4. a kind of hydraulic metering pump duty controlling mechanism as claimed in claim 1 is characterized in that: be Spielpassung between piston (5) and adjustable lever (8), piston (5) and the casing (4).

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