CN2360580Y

CN2360580Y - Improved plunger sliding valve pneumatic impacting mechanism

Info

Publication number: CN2360580Y
Application number: CN 98233067
Authority: CN
Inventors: 党治国
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-09
Filing date: 1998-10-09
Publication date: 2000-01-26
Anticipated expiration: 2008-10-09

Abstract

The utility model relates to an improved plunger sliding valve pneumatic impacting mechanism. The two ends of the two-position plunger sliding valve of the control valve of the utility model are respectively provided with an air passing ring slot used for opening and closing the air ingress-exhaust passages of a stroke and a return-stroke. When a plunger is positioned on the ultimate position of the stroke or the return-stroke, a front and a rear valve pushing air passages are directly communicated with a pressure air source in order to push the two-position plunger sliding valve to carry out position changing, and the two ends of the plunger cylinder of the control valve are respectively provided with air escape pores. In addition, cushioning air pad chambers are arranged among the plunger and the front and the rear end faces of a cylinder chamber. The utility model has the advantages that the air pressure acting on the two sides of the two-position plunger sliding valve is stable, the action is reliable, the working stability of the two-position plunger sliding valve is considerably enhanced, and thereby, the accomplishment of the two advantages of low energy consumption and low noise of an original pneumatic impacting mechanism is ensured.

Description

Improved slide-valve plunger gas impact machine

The utility model relates to gas impact machine, the reciprocating type pneumatic drilling machine in particularly a kind of mine.

The inventor discloses a kind of in Chinese patent ZL90220630 and the diverse novel pneumatic beater mechanism of traditional mechanism, and it comprises parts such as cylinder body, piston and slide-valve plunger.The inlet and outlet passage is all arranged before and after its cylinder body, piston has former and later two distribution bars, the set a distance gas supply mechanism is respectively arranged on it, preceding distribution bar is simultaneously as impact bar, in the back distribution bar axial air flue is arranged, the radially air flue in piston and the aperture of cylinder body wall push away the valve air flue with the forward and backward chamber of slide-valve plunger and communicate.Start to control two slide-valve plungers making usefulness and control the intake and exhaust channel of stroke and backhaul by the twice cannelure.When the air feed of chamber, back, the cup exhaust; During the cup air feed, the exhaust of back chamber constantly hockets, and entire cylinder is in the continuous exhaust pneumatic wallop state.The back pressure of piston is all the time near atmospheric pressure like this, and calming the anger of work done may be expanded near atmospheric pressure in the cylinder, and the energy of calming the anger is fully used, and can reduce noise greatly.Though this mechanism has obviously advantage such as quantitative air feed, low pressure continuous exhaust pneumatic wallop and kick back air cushion, but still have weak point, the plunger two ends that mainly are control valve are connected with the forward and backward work air chamber of cylinder respectively, be subject to the wherein interference of complicated air-flow factors such as eddy current, vacuum, shock wave, make the position instability of plunger, and then influence the reliability of entire mechanism work.For this reason, the present invention has proposed in patent ZL96235629 again a kind of " gas impact machine of band lock-up valve ", though this locking device can be guaranteed the stability of above-mentioned gas impact machine work, and complex structure, manufacturing difficulty, difficult production.

The purpose of this utility model is to overcome above-mentioned difficulties, and provide a kind of improved slide-valve plunger gas impact machine, utilize the power of stable pressurized air source as plunger, make the plunger working stability reliable, be not subjected to the influence of the forward and backward indoor complicated air pressure situation of cylinder, patent structure is simple, economy is high and the advantage of reliable operation thereby have above-mentioned two concurrently.

Solution of the present utility model is:

1) two slide-valve plungers are arranged in the plunger case of its control valve, its two ends respectively have one to cross compression, to open and close the inlet and outlet passage of stroke, backhaul;

2) when piston is in the end of stroke position, pusher valve air flue and pressurized air source are connected; When piston is in the backhaul ultimate position, preceding push away the valve air flue through after the compression of crossing of distribution bar connect with pressurized air source, replace to promote slide-valve plunger;

3) respectively there is a disappointing aperture at the two ends of control valve plunger case;

4) between the front and rear end of piston and cylinder chamber, be equipped with the cushion gas khiva.

A plunger mat can be respectively established at the plunger case two ends of above-mentioned gas impact machine, and this plunger mat diameter is thinner, forms annular air intake duct with cylinder wall.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is the longitudinal plan of slide-valve plunger gas impact machine, and piston is in the state that backhaul begins.

Fig. 2 is that this mechanism's piston is in the state that stroke begins.

Fig. 3 is the structural representation of plunger.

Referring to Fig. 1, Fig. 2, this gas impact machine mainly comprises cylinder body 1, piston 2, front end housing 19, back cylinder cover 49, distribution piece 41 and slide-valve plunger 5 etc.Piston 2 has preceding distribution bar 3 and back distribution bar 4, and wherein preceding distribution bar 3 also is an impact bar.Rear end of the cylinder block is provided with stroke air intake duct 12 and backhaul exhaust duct 60; The cylinder body front end is provided with backhaul air intake duct 11 and stroke exhaust duct 59.

Exhaust duct

59,60 feeds atmosphere by plunger

annular groove

20,25 and secondary steam vent 67,68.The forward and backward distribution bar of piston has set a distance air feed

annular groove

15,16, and calming the anger during respectively through

air intake duct

11,12 when it can enter cylinder and promote piston 2 motions, as Fig. 1 right side, shown in Fig. 2 left side.When the big neck distribution face of

cylinder

17,18 through out-of-date this air intake duct of then closing, stop air feed, thereby form the set a distance air feed.The set a distance air feed can be designed as required by the decision of annular groove width.

Among the figure, pusher valve air flue 43 feeds the left chamber 62 of slide-valve plunger, the preceding right ventricle 61 that pushes away valve air flue 44 feeding slide-valve plungers.The forward and backward valve air flue that pushes away runs to certain position at distribution bar 4, all can directly be communicated with pressurized air source.Respectively there is a

disappointing aperture

45,46 the left and right chamber of slide-valve plunger, and release of pressure can slowly lose heart.Slide-valve plunger 5 is by the two ends pressure differential.

Referring to Fig. 3,

compression

20,25 was respectively arranged in cylindrical plunger guiding valve 5 both sides; φ ₁Be thin neck section; Its big cervical part of esophagus φ ₂Then with the plunger case slipper seal, to open and close aforesaid each inlet and outlet passage.

The following describes a cyclic process of mechanism.Fig. 1 is that the hammer drill impact finishes, and piston is in end of stroke, the position that backhaul begins.Piston distribution bar 4 is crossed pusher valve air flue 43, and pusher valve air flue and pressurized air source 6 are connected.Calming the anger enters chamber 62, a slide-valve plunger left side thus, promotes plunger and moves to right end position.Annular groove 20 on the plunger is connected backhaul air intake duct 11, and annular groove 25 is opened backhaul exhaust duct 60, and stroke exhaust duct 59 and stroke air intake duct 12 then are closed.Calming the anger enters cylinder cup 28 (being air chamber 30) through annular groove 15 and makes the set a distance air feed, to the isobaric work done of piston.Promote piston and make drawback movement left.Waste gas in the back chamber 29 enters atmosphere through backhaul exhaust duct 60.When backward stroke of the piston moved to the big neck 17 sealing backhaul air intake ducts 11 of impact bar 3, intake process stopped, and what entered cup quantitatively calms the anger to the piston expansion working piston kinetic energy continuation increase.When calming the anger of cup is expanded to atmospheric pressure, when the energy of calming the anger had been fully used, backhaul ended.After piston is crossed backhaul steam vent 60, and form cushion gas khiva 31 between the end face of cylinder chamber, piston is stopped.The compression potential energy of air cushion is converted into the initial velocity of piston stroke motion again rapidly subsequently, has made full use of the energy that backhaul is calmed the anger.In backhaul, when the big neck cylinder 18 of distribution bar 4 sealed pusher valve air flues 43, plunger right ventricle 61 was isolated with source of the gas 7 owing to before pushing away valve air flue 44, has bleeder port 45 to communicate with atmosphere, and pressure descends, thereby has formed the pressure reduction at plunger two ends.The pressure reduction that the calming the anger of chamber 62, a plunger left side continues to keep the plunger two ends on the one hand is stabilized on the operating position of backhaul plunger, discharges to eliminate the resistance of plunger commutation next time from bleeder port 46 gradually on the one hand.

Backhaul at the end, crossing compression 22 and before pushing away valve air flue 44 and connect between distribution bar 4 and the distribution piece 41.Make to push away calming the anger of valve source of the gas 7 and enter plunger right ventricle 61, promote plunger and be moved to the left by preceding pushing away valve air flue 44, position as shown in Figure 2, stroke begins.This moment, the stroke of plunger left end was crossed compression 25 with source of the gas 8 and 12 connections of stroke air intake duct, and the chamber 29 after set a distance air feed annular groove 16 enters cylinder of calming the anger (being air chamber 31) promotes piston and make stroke movement (to the right).Plunger is opened stroke steam vent 59 simultaneously, with

backhaul steam vent

60 and 11 sealings of backhaul air intake duct.Waste gas behind the cup expansion working enters atmosphere through stroke exhaust duct 59, mistake compression 20.The back pressure of piston stroke is all the time near atmospheric pressure, and when stroke air intake duct 12 had been sealed on the big neck face of cylinder 18 of back distribution bar, the air inlet of back chamber stopped.The chamber quantitatively calms the anger to the piston expansion working after entering.Run to the position of closed grate hole 59 until piston, impact energy reaches maximum and hits the bit shank work done.Piston is got back to the position of Fig. 1 heavily again like this, and a circulation finishes, and second backhaul begins.Do not pacify hammer drill and sky hits as piston nose, the cushion gas khiva 30 that forms between piston and the front end housing 19 can make piston stop, and the protection front end housing is not impacted.For this reason, between exhaust duct 59 and cylinder chamber end face a little spacing is arranged, the piston side is provided with shoulder 63 to seal the aperture, forms air chamber.The piston opposite side also has shoulder 62, plays same purpose.

In addition, respectively there is a

plunger mat

38,39 at above-mentioned plunger case 52 two ends, and the plunger mat diameter is thinner, form annular

air intake duct

48,49 with cylinder wall.

Improved gas impact machine, its advantage are that to act on the air pressure of two slide-valve plunger both sides direct by source of the gas Pressure stability, reliable in action are provided. In the overall process of backhaul and stroke, push away valve and calm the anger and the forward and backward chamber of cylinder Air pressure irrelevant. Thoroughly avoided in the original structure because of the plunger two ends be communicated with the forward and backward chamber of cylinder respectively be subjected to eddy current, The interference of the complicated factor such as vacuum, shock wave has greatly improved the stability of plunger valve work, thereby has guaranteed Primordial Qi Moving beater mechanism low power consuming, low noise two big advantages are achieved. Have aforementioned two the patent structure letters of the inventor concurrently Singly, economy is high and the advantage of reliable operation.

Claims

1, a kind of improved slide-valve plunger gas impact machine comprises cylinder body (1), piston (2), the forward and backward distribution bar of piston (3,4), and wherein preceding distribution bar (3) is simultaneously as impact bar, and back distribution bar (4) links to each other with source of the gas (6); The cylinder body front end has stroke exhaust duct (59) and backhaul air intake duct (11), and rear end of the cylinder block has stroke air intake duct (12) and backhaul exhaust duct (60); Backhaul and stroke air intake duct (11), (12) form the set a distance air feed with the annular groove (15) of distribution bar (3), (4), (16) respectively; It is characterized in that:

1) in the plunger case of control valve (52) one two slide-valve plungers (5) are arranged, respectively there was compression (20,25) at its two ends, to open and close the inlet and outlet passage of stroke, backhaul;

2) when piston (2) is in the end of stroke position, pusher valve air flue (43) is connected with pressurized air source (6); When piston (2) is in the backhaul ultimate position, preceding push away valve air flue (44) through after the compression (22) of crossing of distribution bar (4) connect with pressurized air source (7), to promote the slide-valve plunger transposition.

3) respectively there are a disappointing aperture (45), (46) in the two ends of control valve plunger case (52);

4) between the front and rear end of piston (2) and cylinder chamber, be provided with cushion gas khiva (30), (31).

2, gas impact machine as claimed in claim 1 is characterized in that respectively there are a plunger mat (38), (39) in said plunger case (52) two ends, and the plunger mat diameter is thinner, forms annular air intake duct (48), (49) with cylinder wall.