CN201574432U

CN201574432U - Rotary control valve

Info

Publication number: CN201574432U
Application number: CN2009202900305U
Authority: CN
Inventors: 王金铂
Original assignee: QINGDAO KAIRUISITONG HYDRAULIC MACHINERY CO Ltd
Current assignee: CHINA QINGDAO LKC HYDRAULIC MACHINERY CO., LTD.
Priority date: 2009-12-16
Filing date: 2009-12-16
Publication date: 2010-09-08
Anticipated expiration: 2019-12-16

Abstract

The utility model relates to a rotary control valve which comprises a valve body; two connecting sleeves are respectively installed at both ends of the valve body, wherein control oil ports are respectively formed on the two connecting sleeves, an oil feed groove, an oil feed cavity, a valve core cavity, an oil return groove and an oil return cavity are respectively arranged in the valve body, the oil feed groove is an inverted-U-shaped groove, two oil outlets are respectively formed on both sides of the oil feed groove, the oil return groove is a U-shaped groove, both ends of the oil return groove are positioned on both sides of the two oil outlets, a valve core is installed in the valve core cavity, and two oil grooves, two throttling grooves and two side oil grooves are respectively formed on the valve core; a one-way valve is installed on the valve body; and a mounting cavity and a moving cavity are respectively formed in the second connecting sleeve, an adjustable bolt is installed in the mounting cavity, a second spring seat is installed on the circumference of the adjustable bolt and is in contact with a dummy club between the mounting cavity and the moving cavity, a screw hole is formed at one end of the valve core and connected with the adjustable bolt through threads, a first spring seat is installed on the circumference of the valve core, a first spring is installed on the circumference of the adjustable bolt, and a limit convex edge is arranged at the right end of the adjustable bolt.

Description

Rotary control valve

Technical field

The utility model relates to the rotary control valve that uses on a kind of excavator.

Background technology

The rotary control valve of existing excavator has the following disadvantages, and promptly existing rotary control valve structure is comparatively complicated, and fragile in the course of work, application life is shorter.

Summary of the invention

The purpose of this utility model provides a kind of rotary control valve, and it can solve the problem that prior art exists, and has simple in structure, cheap for manufacturing cost, long service life and advantage easy to use.

The utility model for achieving the above object, be achieved through the following technical solutions: rotary control valve, comprise valve body, two ends of valve body is installed first adapter sleeve and second adapter sleeve respectively, offer the first control oilhole on first adapter sleeve, offer second control port on second adapter sleeve, offer oil-feed tank in the valve body, oil suction chamber, spool chamber, oil-recovery tank and oil back chamber, oil-feed tank is an inverted U-channel, oil-feed tank communicates with oil suction chamber, first oil-out and second oil-out are offered in the oil-feed tank both sides, oil-recovery tank is a U-lag, the two ends of oil-recovery tank are positioned at the both sides of first oil-out and second oil-out, oil-recovery tank communicates with oil back chamber, spool chamber is controlled oilhole with first respectively, second control port, oil-recovery tank, first oil-out, second oil-out and oil-feed tank communicate, spool is installed in the spool chamber, offer first oil groove on the spool, second oil groove, the first segment chute, second throttling channel, the first side oil groove and the second side oil groove, the first segment chute and the first side oil groove communicate with first oil groove, and the second side oil groove and second throttling channel communicate with second oil groove; The one way valve that the control oil suction chamber opens and closes is installed on the valve body, and one way valve cooperates with oil suction chamber; Offer installation cavity and mobile cavity in second adapter sleeve, installation cavity communicates with mobile cavity, the diameter of installation cavity is greater than the diameter of mobile cavity, install in the installation cavity and regulate bolt, regulate the periphery of bolt second spring base is installed, second spring base contacts with boss between installation cavity and the mobile cavity, one end of spool is provided with screw, screw is connected with the adjusting bolt thread, and the periphery of spool is installed first spring base, regulates the periphery of bolt first spring is installed, one end of first spring contacts with first spring base, the other end of first spring contacts with second spring base, and the right-hand member of regulating bolt is provided with spacing convex edge, and spacing convex edge cooperates with second spring base.

In order further to realize the purpose of this utility model, can also be by the following technical solutions: described one way valve be connected and composed by one way valve valve body, one way valve spool and second spring, the one way valve valve body is threaded with valve body, offer one way valve spool chamber in the one way valve valve body, the one way valve spool is installed in the one way valve spool chamber, the lower end of one way valve spool cooperates with oil suction chamber, the lower end of one way valve spool is provided with the convex edge, the periphery of one way valve spool is installed second spring, the lower end of second spring contacts with the convex edge, and the upper end of second spring contacts with the one way valve valve body.Offer the unloading mouth on the valve body, the unloading mouth communicates with oil-recovery tank.

Advantage of the present utility model is: its compactness simple for structure, be convenient to processing and manufacturing, and cheap for manufacturing cost, safe and reliable to operation, long service life; And, offer throttling channel on its spool, can guarantee that revolution control is safe and reliable to operation, prevent the situation of valve insertion pressurized explosion, help the processes such as starting, acceleration of rotary motor.

Description of drawings

Fig. 1 is a structural representation of the present utility model; Fig. 2 is the structural representation of the utility model spool; Fig. 3 is the structural representation of the utility model valve body, and one way valve is installed on the valve body.

Number in the figure: 1 first adapter sleeve, 2 valve bodies, 3 spools, 4 first spring bases, 5 first springs, 6 second adapter sleeves, 7 adjusting bolts, 8 second spring bases, 9 first oil grooves, 10 second oil grooves, 11 check valve valve bodies, 12 inner elements of check valves, 13 second springs, 14 oil suction chambers, 15 first oil-outs, 16 second oil-outs, 17 first segment chutes, 18 second section chutes, 19 first side oil grooves, 20 second side oil grooves, 21 oil-recovery tanks, 22 installation cavitys, 23 oil back chambers, 24 unloading ports, 25 screws, 26 oil-feed tanks, 27 spool chambers, 28 limit convexes are along 29 mobile cavity 30 inner elements of check valve chambeies, 31 first control oilhole 32 convex edges, 33 second control ports.

The specific embodiment

Rotary control valve described in the utility model, comprise valve body 2, the two ends of valve body 2 are installed first adapter sleeve 1 and second adapter sleeve 6 respectively, offer the first control oilhole 31 on first adapter sleeve 1, offer second control port 33 on second adapter sleeve 6, offer oil-feed tank 26 in the valve body 2, oil suction chamber 14, spool chamber 27, oil-recovery tank 21 and oil back chamber 23, oil-feed tank 26 is inverted U-channels, oil-feed tank 26 communicates with oil suction chamber 14, first oil-out 15 and second oil-out 16 are offered in oil-feed tank 26 both sides, oil-recovery tank 21 is U-lags, the two ends of oil-recovery tank 21 are positioned at the both sides of first oil-out 15 and second oil-out 16, oil-recovery tank 21 communicates with oil back chamber 23, spool chamber 27 is controlled oilhole 31 with first respectively, second control port 33, oil-recovery tank 21, first oil-out 15, second oil-out 16 and oil-feed tank 26 communicate, spool 3 is installed in the spool chamber 27, offer first oil groove 9 on the spool 3, second oil groove 10, first segment chute 17, second throttling channel 18, the first side oil groove 19 and the second side oil groove 20, the first segment chute 17 and the first side oil groove 19 communicate with first oil groove 9, and the second side oil groove 20 and second throttling channel 18 communicate with second oil groove 10; The one way valve that control oil suction chamber 14 opens and closes is installed on the valve body 2, and one way valve cooperates with oil suction chamber 14, and described one way valve can prevent the interior oil backflow of oil-feed tank 26 back in the oil pocket 14, guarantees that engineering machinery normally moves; Offer installation cavity 22 and mobile cavity 29 in second adapter sleeve 6, installation cavity 22 communicates with mobile cavity 29, the diameter of installation cavity 22 is greater than the diameter of mobile cavity 29, install in the installation cavity 22 and regulate bolt 7, regulate the periphery of bolt 7 second spring base 8 is installed, second spring base 8 contacts with boss between installation cavity 22 and the mobile cavity 29, one end of spool 3 is provided with screw 25, screw 25 is threaded with adjusting bolt 7, the periphery of spool 3 is installed first spring base 4, regulate the periphery of bolt 7 first spring 5 is installed, one end of first spring 5 contacts with first spring base 4, and the other end of first spring 5 contacts with second spring base 8, and the right-hand member of regulating bolt 7 is provided with spacing convex edge 28, spacing convex edge 28 cooperates with second spring base 8, makes adjusting bolt 7 can drive second spring base 8 and is moved to the left.Mobile cavity 29 provides enough spaces for regulating moving right of bolt 7.The effect of the first segment chute 17 and second throttling channel 18 is as follows, when spool 3 has just begun a left side or moves right, at first oil-out 15 communication is not arranged, when second oil-out 16 has been linked up, second oil-out 16 is set up pressure, and second oil-out, 16 pressure do not discharge immediately; When spool 3 continues to move, can guarantee that rotary motor in that soft starting under the situation of back pressure is arranged, can not produce impact; When spool 3 is moved further, first oil-out 15 is opened, and second oil-out 16 has been linked up, and speed is set up in the rotary motor starting like this; Spool 3 continues to move afterwards, and along with second oil-out 16 and first oil-out, 15 apertures constantly increase, the also corresponding increase of area of passage can guarantee fuel delivery, makes rotary motor quicken starting, guarantees to make the imperceptible accelerator of operator simultaneously.

Under the off working state, as shown in Figure 1, first oil groove 9 communicates with first oil-out 15, and second oil groove 10 communicates with second oil-out 16, and oil-recovery tank 21, oil-feed tank 26, first oil-out 15 and 16 of second oil-outs are not connected between the two.When the pressure oil from pilot valve flows into spool chamber 27 by the first control oilhole 31, the elastic force that pressure oil promotion spool 3 overcomes first spring 5 moves right, make first oil groove 9 UNICOMs, first oil-out 15 and the oil-feed tank 26, second oil groove, 10 UNICOMs, second oil-out 16 and oil-recovery tank 21, at this moment, the oil in second oil-out 16 is got back to fuel tank through second oil groove 10, oil-recovery tank 21 and oil back chamber 23; Oil in the oil suction chamber 14 is washed described one way valve open, flows out the action of control excavator through oil-feed tank 26, first oil groove 9 and first oil-out 15; When pilot valve stopped left side fuel feeding, first spring 5 promoted spool 3 and resets.When the pressure oil from pilot valve flows into spool chamber 27 by second control port 33, pressure oil is by regulating bolt 7, the elastic force that overcomes first spring 5 promotes spool 3 and is moved to the left, make first oil-out 15 by first oil groove 9 and oil-recovery tank 21 UNICOMs, second oil-out 16 is connected with oil-feed tank 26 by second oil groove 10, at this moment, oil in first oil-out 15 is back to fuel tank through first oil groove 9, oil-recovery tank 21 and oil back chamber 23, and the oil in the oil suction chamber 14 is washed described one way valve open and flowed out the action of control excavator through oil-feed tank 26, second oil groove 10 and second oil-out 16; After the pressure oil decompression, first spring 5 promotes spool 3 and resets.

Described one way valve is connected and composed by one way valve valve body 11, one way valve spool 12 and second spring 13, one way valve valve body 11 is threaded with valve body 2, offer one way valve spool chamber 30 in the one way valve valve body 11, one way valve spool 12 is installed in the one way valve spool chamber 30, the lower end of one way valve spool 12 cooperates with oil suction chamber 14, the lower end of one way valve spool 12 is provided with convex edge 32, the periphery of one way valve spool 12 is installed second spring 13, the lower end of second spring 13 contacts with convex edge 32, and the upper end of second spring 13 contacts with one way valve valve body 11.This one-way valve structures is simple, cheap and can prevent effectively that the oil in the oil-feed tank 26 is back in the oil suction chamber 14.

For preventing under the overload situations to damage valve body, can offer unloading mouthfuls 24 on the valve body 2, unloading mouthfuls 24 communicates with oil-recovery tank 21, and unloading mouth 24 can be installed overload valve.The utility model not technology contents of detailed description is known technology.

Claims

1. rotary control valve, it is characterized in that: comprise valve body (2), the two ends of valve body (2) are installed first adapter sleeve (1) and second adapter sleeve (6) respectively, offer the first control oilhole (31) on first adapter sleeve (1), offer second control port (33) on second adapter sleeve (6), offer oil-feed tank (26) in the valve body (2), oil suction chamber (14), spool chamber (27), oil-recovery tank (21) and oil back chamber (23), oil-feed tank (26) is an inverted U-channel, oil-feed tank (26) communicates with oil suction chamber (14), first oil-out (15) and second oil-out (16) are offered in oil-feed tank (26) both sides, oil-recovery tank (21) is a U-lag, the two ends of oil-recovery tank (21) are positioned at the both sides of first oil-out (15) and second oil-out (16), oil-recovery tank (21) communicates with oil back chamber (23), spool chamber (27) is controlled oilhole (31) with first respectively, second control port (33), oil-recovery tank (21), first oil-out (15), second oil-out (16) and oil-feed tank (26) communicate, spool (3) is installed in the spool chamber (27), offer first oil groove (9) on the spool (3), second oil groove (10), first segment chute (17), second throttling channel (18), the first side oil groove (19) and the second side oil groove (20), the first segment chute (17) and the first side oil groove (19) communicate with first oil groove (9), and the second side oil groove (20) and second throttling channel (18) communicate with second oil groove (10); Valve body (2) is gone up the one way valve that control oil suction chamber (14) opens and closes is installed, and one way valve cooperates with oil suction chamber (14); Offer installation cavity (22) and mobile cavity (29) in second adapter sleeve (6), installation cavity (22) communicates with mobile cavity (29), the diameter of installation cavity (22) is greater than the diameter of mobile cavity (29), install in the installation cavity (22) and regulate bolt (7), regulate the periphery of bolt (7) second spring base (8) is installed, second spring base (8) contacts with boss between installation cavity (22) and the mobile cavity (29), one end of spool (3) is provided with screw (25), screw (25) is threaded with adjusting bolt (7), the periphery of spool (3) is installed first spring base (4), regulate the periphery of bolt (7) first spring (5) is installed, one end of first spring (5) contacts with first spring base (4), the other end of first spring (5) contacts with second spring base (8), the right-hand member of regulating bolt (7) is provided with spacing convex edge (28), and spacing convex edge (28) cooperate with second spring base (8).

2. rotary control valve according to claim 1, it is characterized in that: described one way valve is by one way valve valve body (11), one way valve spool (12) and second spring (13) connect and compose, one way valve valve body (11) is threaded with valve body (2), offer one way valve spool chamber (30) in the one way valve valve body (11), one way valve spool (12) is installed in the one way valve spool chamber (30), the lower end of one way valve spool (12) cooperates with oil suction chamber (14), the lower end of one way valve spool (12) is provided with convex edge (32), the periphery of one way valve spool (12) is installed second spring (13), the lower end of second spring (13) contacts with convex edge (32), and the upper end of second spring (13) contacts with one way valve valve body (11).

3. rotary control valve according to claim 1 is characterized in that: offer unloading mouthful (24) on the valve body (2), unloading mouthful (24) communicates with oil-recovery tank (21).