Adjustable synchronous valve

Abstract

A valve hole is machined in a valve body, a variable throttling valve sleeve, a sliding valve and a piston are arranged in the valve hole from outside to inside, a transverse channel and a vertical channel are arranged at the center of the sliding valve, an oil inlet is formed in the upper portion of the valve body, two oil outlets are formed in the lower portion of the valve body, and the oil inlet is communicated with a flow dividing adjusting valve. The flow dividing adjusting valve is communicated with a center through hole of the variable throttling valve sleeve, the vertical channel and an oil port e of the flow collecting adjusting valve, the transverse channel is communicated with the sliding valve, an oil port of the flow dividing adjusting valve is communicated with an inner hole of the piston through two first oil ways, and side through holes are formed in two side arms of the piston, the sliding valve and the variable throttling valve sleeve. The piston, the sliding valve and the side through hole of the variable throttling valve sleeve are communicated and communicated with the oil outlets, and the flow collecting adjusting valve is communicated with the two oil outlets respectively. According to the valve body structure, the precision of the flow dividing working condition and the precision of the flow collecting working condition are adjusted correspondingly, and the synchronization requirement of equipment with forced guiding can be met under the flow dividing working condition and the flow collecting working condition.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic fluid control components, in particular to an adjustable shunt and manifold hydraulic synchronous valve, and particularly to a device with a guiding device for forced synchronization. Background Art

[0002] Hydraulic synchronous valves are widely used and can be selected whenever two or more cylinders or motors need to be synchronized. Currently, the synchronous principle schemes adopted are divided into two types: open-loop and closed-loop control. Open-loop control products such as synchronous valves, synchronous motors, synchronous cylinders, etc. have a synchronous accuracy of 1-3%. Closed-loop control products such as proportional valves, servo valves, numerical control synchronous valves, etc. The open-loop control has a simple structure, low cost, and low accuracy. Closed-loop products require sensor feedback and module controller adjustment, with very high accuracy, but also high cost. In actual production, the guiding synchronous device requires two-way synchronization of the cylinder extending and retracting. Such as various hydraulic presses, shearing machines, die stamping equipment, etc.

[0003] Taking the open-loop control synchronous valve as an example: Due to the influence brought by the pressure difference change of the inlet and outlet throttle holes in the two working conditions of shunting and manifold, generally, the shunt and manifold synchronous accuracies of the synchronous valve are not the same. The existing synchronous valves in the market with fine-tuning of accuracy can only achieve the adjustment of one of the shunt and manifold states. If the shunt accuracy is improved, the corrected error will be superimposed on the manifold working condition, resulting in a huge error during manifold, and it can no longer be used. However, even if the shunt and manifold synchronous accuracies can reach 1% at the same time, it still cannot meet the synchronous requirements of such equipment. This accuracy has an error of about 10 mm on a one-meter stroke cylinder, which will cause deformation or even breakage of the guiding rod. Although the accuracy of the closed-loop products can meet the requirements, their excessively high accuracy far exceeds the requirements of such equipment, mainly because of their high price and high later maintenance cost. Therefore, designing a low-cost product with accuracy meeting the requirements has become an urgent need in the market. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an adjustable synchronous valve with high synchronous accuracy in both shunting and manifold working conditions.

[0005] The technical solution of the utility model:

[0006] An adjustable synchronous valve, the synchronous valve includes a valve body, a flow dividing regulating valve, a variable throttle valve sleeve, a spool valve, a piston, and a flow collecting regulating valve. A valve hole is machined inside the valve body, and the variable throttle valve sleeve is press-fitted in the valve hole. A spool valve is slidably connected inside the variable throttle valve sleeve. Two sliding pistons are installed inside the spool valve. At the center of the spool valve, there is a vertical and horizontal passage formed by the intersection of a horizontal passage and a vertical passage. An oil inlet is opened at the upper part of the valve body, and two oil outlets are opened at the lower part of the valve body. The oil inlet is communicated with the a oil port of the flow dividing regulating valve. The b oil port of the flow dividing regulating valve is communicated with the central through hole of the variable throttle valve sleeve, the central through hole of the spool valve, the vertical passage, and the e oil port of the flow collecting regulating valve. The horizontal passage is communicated with both sides of the spool valve. The c oil port and the d oil port on both sides of the flow dividing regulating valve are communicated with the inner holes of the two pistons through two horizontally symmetric first oil passages on the left and right. Side through holes are opened on the side walls on both the left and right sides of the piston, the spool valve, and the variable throttle valve sleeve. And the side through holes of the piston, the side through holes of the spool valve, and the side through holes of the variable throttle valve sleeve are communicated with each other and are respectively communicated with the two oil outlets through pipelines. The f oil port and the g oil port on both sides of the flow collecting regulating valve are respectively communicated with the two oil outlets.

[0007] An adjustable synchronous valve, the synchronous valve includes a valve body, a flow dividing regulating valve, a variable throttle valve sleeve, a spool valve, a piston, and a flow collecting regulating valve. A valve hole is machined inside the valve body, and the variable throttle valve sleeve is press-fitted in the valve hole. A spool valve is slidably connected inside the variable throttle valve sleeve. Two sliding pistons are installed inside the spool valve. At the center of the spool valve, there is a vertical and horizontal passage formed by the intersection of a horizontal passage and a vertical passage. An oil inlet is opened at the upper part of the valve body, and two oil outlets are opened at the lower part of the valve body. The oil inlet is communicated with the a oil port of the flow dividing regulating valve. The b oil port of the flow dividing regulating valve is communicated with the central through hole of the variable throttle valve sleeve, the central through hole of the spool valve, the vertical passage, and the e oil port of the flow collecting regulating valve. The horizontal passage is communicated with both sides of the spool valve. The c oil port and the d oil port on both sides of the flow dividing regulating valve are communicated with the inner holes of the two pistons through two horizontally symmetric first oil passages on the left and right. Side through holes are opened on the side walls on both the left and right sides of the piston, the spool valve, and the variable throttle valve sleeve. And the side through holes of the piston, the side through holes of the spool valve, and the side through holes of the variable throttle valve sleeve are communicated with each other and are respectively communicated with the two oil outlets through pipelines. The f oil port and the g oil port on both sides of the flow collecting regulating valve are respectively communicated with the two oil outlets through two horizontally symmetric second oil passages on the left and right on both sides and are communicated with the first oil passage.

[0008] The beneficial effects of the present utility model:

[0009] 1. The adjustable synchronous valve of the present application is a valve body structure that adjusts the high precision of the flow dividing condition and the flow collecting condition respectively, and can meet the requirements of the forced synchronization equipment with guiding measures in both the flow dividing and flow collecting conditions.

[0010] 2. The adjustable synchronous valve of the present application has a simple structure and low cost.

[0011] 3. In actual use, the partial flow regulating rod on the rotatable flow dividing regulating valve and the inclined surface regulating rod on the upper part of the flow collecting regulating valve can be rotated to change the flow area covered by their inclined surfaces, thereby correcting the flow dividing and flow collecting errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the provided drawings.

[0013] Figure 1 Structural schematic diagram of the adjustable synchronous valve of the present application.

[0014] Figure 2 Another structural schematic diagram of the adjustable synchronous valve of the present application.

[0015] Figure 3 A - A cross - sectional view of the flow collecting regulating valve.

[0016] Figure 4 B - B cross - sectional view of the flow dividing regulating valve.

[0017] Reference numerals:

[0018] Valve body 1; Flow dividing regulating valve 2; Variable throttle valve sleeve 3; Spool valve 4; Piston 5; Flow collecting regulating valve 6; Lateral channel 7; Vertical channel 8; Inlet port 9; Outlet port 10; Port a 11; Port b 12; Central through - hole of variable throttle valve sleeve 13, Central through - hole of spool valve 14; Port e 15; Port c 16; Port d 17; First oil circuit 18; Side through - hole of piston 19; Oil passing groove 20; Side through - hole of variable throttle valve sleeve 21; Port f 22; Port g 23; Second oil circuit 24; Plug 25; Flow collecting valve sleeve 26; Inclined surface regulating rod 27; Cut - off piece 28; Spring 29; Flow dividing valve sleeve 30; Flow dividing regulating rod 31; Valve sleeve port 32; Flow collecting hole 33; Flow dividing hole 34. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to solve the problems in the background art, the present application particularly invents an adjustable synchronous valve, which can improve the synchronization accuracy in both the flow - dividing condition and the liquid - collecting condition, and solves the problem of the synchronization accuracy in only the flow - dividing condition or the flow - collecting condition in the prior art.

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] It should be noted that in the description of the present application, terms indicating directions or positional relationships such as "upper part", "lower part", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0022] As Figure 1 shown, an adjustable synchronous valve includes a valve body 1, a flow dividing regulating valve 2, a variable throttle valve sleeve 3, a spool valve 4, a piston 5, and a flow collecting regulating valve 6. A valve hole is machined inside the valve body 1, and the variable throttle valve sleeve 3 is installed in the valve hole in an interference fit manner. A spool valve 4 is slidably connected inside the variable throttle valve sleeve 3. Two sliding pistons 5 are installed inside the spool valve 4. At the center of the spool valve 4, there is a vertical and horizontal passage formed by the intersection of a horizontal passage 7 and a vertical passage 8. An oil inlet 9 is opened at the upper part of the valve body 1, and two oil outlets 10 are opened at the lower part of the valve body 1. The oil inlet 10 is communicated with the a oil port 11 of the flow dividing regulating valve. The b oil port 12 of the flow dividing regulating valve is communicated with the central through hole 13 of the variable throttle valve sleeve, the central through hole 14 of the spool valve, the vertical passage 8, and the e oil port 15 of the flow collecting regulating valve. The horizontal passage 7 is communicated with both sides of the spool valve 4. The c oil port 16 and the d oil port 17 on both sides of the flow dividing regulating valve 6 are communicated with the inner holes of the two pistons 5 through two horizontally symmetric first oil passages 18 on the left and right. Side through holes are opened on the side walls on both the left and right sides of the piston 5, the spool valve 4, and the variable throttle valve sleeve 3. Moreover, the piston side through hole 19, the spool valve side through hole 20, and the variable throttle valve sleeve side through hole 21 are communicated with each other and are respectively communicated with the two oil outlets 10 through pipelines. The f oil port 22 and the g oil port 23 on both sides of the flow collecting regulating valve are respectively communicated with the two oil outlets 10.

[0023] In the present application, a variable throttle valve sleeve is arranged inside the valve body, replacing the counterbore ring groove on the valve body that can change the pressure in the chambers on both sides of the spool valve by covering the area of the side through hole of the spool valve. The processing of the inner hole counterbore ring groove has high requirements for equipment accuracy and the operator's level, and is difficult to machine.

[0024] As Figure 2As shown in the figure, the second adjustable synchronous valve structure includes a valve body 1, a flow dividing regulating valve 2, a variable throttle valve sleeve 3, a spool valve 4, a piston 5, and a flow collecting regulating valve 6. A valve hole is machined inside the valve body 1, and the variable throttle valve sleeve 3 is installed in the valve hole by interference fit. A spool valve 4 is slidably connected inside the variable throttle valve sleeve 3. Two sliding pistons 5 are installed inside the spool valve 4. At the center of the spool valve 4, there is a horizontal and vertical passage formed by the intersection of a horizontal passage 7 and a vertical passage 8. An oil inlet 9 is opened at the upper part of the valve body 1, and two oil outlets 10 are opened at the lower part of the valve body 1. The oil inlet 10 is communicated with the a oil port 11 of the flow dividing regulating valve. The b oil port 12 of the flow dividing regulating valve is communicated with the central through hole 13 of the variable throttle valve sleeve, the central through hole 14 of the spool valve, the vertical passage 8, and the e oil port 15 of the flow collecting regulating valve. The horizontal passage 7 is communicated with the spool valve 4. The c oil port 16 and d oil port 17 on the left and right sides of the flow dividing regulating valve 6 are communicated with the inner holes of the two pistons 5 through two horizontally symmetric first oil passages 18 on the left and right. Side through holes are opened on the side walls on the left and right sides of the piston 5, the spool valve 4, and the variable throttle valve sleeve 3, and the piston side through hole 19, the spool valve side through hole 20, and the variable throttle valve sleeve side through hole 21 are communicated with each other and are respectively communicated with the two oil outlets 10 through pipelines. The f oil port and g oil port on the left and right sides of the flow collecting regulating valve are respectively communicated with the first oil passage through two horizontally symmetric second oil passages on the left and right sides of both sides.

[0025] Appendix Figure 2 The benefit brought by the flow collecting regulating valve in Figure 2 being communicated with the horizontally symmetric second oil passage of the valve body is that when the load pressures of the two oil outlets change in the flow collecting working condition, the pressure difference between the f oil port and g oil port of the flow collecting regulating valve can be adjusted by the left and right sliding of the spool valve to remain constant, and the correction flow accuracy is not affected by the change of the external load pressure.

[0026] The flow collecting regulating valve 6 includes a plug 25, a flow collecting regulating valve sleeve 26, an inclined plane adjusting rod 27, a cut-off member 28, and a spring 29. The plug is threadedly connected to the valve body, and the flow collecting regulating valve sleeve is in close contact with the plug. There is a stepped valve hole inside the flow collecting regulating valve sleeve. A spring is installed at the lower part of the valve hole of the flow collecting regulating valve sleeve, and the spring abuts against the plug. The side wall of the flow collecting regulating valve sleeve is provided with an e oil port, an f oil port, and a g oil port. A cut-off member is installed below the f oil port and g oil port inside the flow collecting regulating valve sleeve. The e oil port is between the cut-off member and the spring. The inclined plane adjusting rod is inserted into the flow collecting regulating valve sleeve, and the lower part of the inclined plane adjusting rod is an inclined plane corresponding to the f oil port and g oil port. The cut-off member is a steel ball or a cone valve.

[0027] The flow dividing regulating valve 2 includes a flow dividing regulating valve sleeve 30 and a flow dividing adjusting rod 31. The flow dividing regulating valve sleeve is inserted into the valve body and fixedly connected to the valve body. The side wall of the flow dividing regulating valve sleeve is provided with an a oil port, a b oil port, a c oil port, and a d oil port. The inside of the flow dividing regulating valve sleeve is a stepped hole. The lower part of the flow dividing adjusting rod is an inclined plane corresponding to the a oil port, the c oil port, and the d oil port.

[0028] An oil passage groove is formed at the outer side of the variable throttle valve sleeve corresponding to the through hole on the side of the variable throttle valve sleeve. The piston side through hole, the spool side through hole and the variable throttle valve sleeve side through hole are respectively communicated with two oil outlets through the oil passage groove. In this application, the oil passage groove is formed at the outer side of the through hole on the side of the variable throttle valve sleeve to increase the oil passage area and effectively reduce the pressure loss of the passage.

[0029] The spool side through holes on the left and right side walls of the spool are two rows of through holes. The row of through holes close to the vertical passage is the confluence hole 33, and the row of through holes far from the vertical passage is the diversion hole 34. In this application, the side through holes on both sides of the spool are two rows of through holes. The row of through holes close to the vertical passage is the confluence hole, which is used for the confluence working condition. When the sliding piston is at a certain position, the diversion hole is closed, and the piston side through hole and the variable throttle valve sleeve side through hole are communicated. The row of through holes far from the vertical passage is the diversion hole, which is used for the diversion working condition. When the sliding piston is at a certain position, the confluence hole is closed, and the piston side through hole and the variable throttle valve sleeve side through hole are communicated.

[0030] Such as Figure 1 shown: When the synchronous valve of this application works, it is in two states, namely the diversion state and the confluence state.

[0031] (1) In the diversion state: The hydraulic oil enters the a port of the diversion regulating valve from the oil inlet, flows out through the symmetrically identical throttling holes (i.e., the c port and the d port) on the left and right of the diversion regulating valve. At the same time, it also enters the vertical passage through the b port of the diversion regulating valve. Under the action of the oil pressure in the vertical passage, the piston in the spool separates left and right, closing the confluence hole. The piston is communicated with the spool side through hole (the diversion hole is used in the diversion working condition), the variable throttle valve sleeve side through hole and the oil passage groove. At this time, the steel ball in the confluence regulating valve is tightly pressed on the valve sleeve port 32 by the resultant force of the oil pressure and the spring, and the oil is blocked and cannot flow. The pressure oil flowing out from the c port and the d port on both sides of the diversion regulating valve enters the left and right pistons through the two horizontally symmetric first oil passages on the left and right of the valve body, and flows to the two oil outlets and flows out of the oil outlets through the piston side through hole, the spool side through hole (the diversion hole is used in the diversion working condition) and the variable throttle valve sleeve side through hole. When the load pressures at the two oil outlets are equal, the pressures on both sides of the spool are equal, and the pressure differences between the two symmetric c ports and d ports are equal. Therefore, the hydraulic flow is evenly divided into two parts and flows out equally. When the load pressure changes, such as Figure 1 when the pressure at the left oil outlet in[[]]increases, it will also cause the pressure on the left side of the spool to increase, and the pressure difference of the left c port becomes smaller. However, this increased pressure will push the spool to move to the right, increasing the oil outlet opening area of the variable throttle valve sleeve side through hole on the left side, reducing the pressure at the left end of the spool, and at the same time reducing the oil outlet opening area of the variable throttle valve sleeve side through hole on the right side, increasing the pressure at the right end of the spool. When the pressures at both ends of the spool reach equality again, the spool stops moving. At this time, the pressure differences of the c port and the d port are restored to equality, and the flow rate still returns to the average value and is not affected by the load pressure.

[0032] In actual use, due to inevitable manufacturing dimensional errors, changes in internal leakage caused by on-site oil temperature variations, frequent conversion of load pressures, etc., the synchronous flow splitting accuracy will be significantly affected. At this time, the flow splitting adjusting rod on the upper part of the flow splitting regulating valve can be rotated to change the inclined plane covering angle and correct the flow splitting error. At this time, the pressure oil leading to the flow collecting regulating valve in the lower part of the valve body is blocked by the steel ball and remains static, without affecting the adjustment of the flow splitting accuracy.

[0033] (2) In the flow collecting state, the hydraulic oil enters from the two oil outlets and then divides into two paths. One path passes through the oil groove, the side through hole of the variable throttle valve sleeve, the side through hole of the spool valve, and the side through hole of the piston and enters the piston. At this time, due to the pressure acting on both sides of the spool valve, the piston closes the flow splitting hole (the flow collecting hole is used in the flow collecting working condition) by closing in the middle of the spool valve and enters the first oil path, then enters the flow splitting regulating valve through the c oil port and d oil port of the flow splitting regulating valve, and finally flows back to the oil inlet through the a oil port of the flow splitting regulating valve. The other path enters the flow collecting regulating valve through the f oil port and g oil port of the flow collecting regulating valve, then enters the vertical channel through the e oil port of the flow collecting regulating valve, and then flows back to the oil inlet through the b oil port and a oil port of the flow splitting regulating valve.

[0034] In the flow collecting state, the state of the flow collecting regulating valve is that the reverse oil flow passes through the two oil outlets, enters the flow collecting regulating valve along the symmetrical through holes f oil port and g oil port, and the reverse oil pressure acts on the cut-off steel ball, overcoming the spring force to open the e oil port, and then enters the vertical channel through the e oil port, and flows back to the oil inlet through the central through hole of the spool valve, the central through hole of the variable throttle valve sleeve, and the flow splitting regulating valve. In the flow collecting state, the symmetrical holes c oil port and d oil port on the flow splitting regulating valve and the symmetrical holes f oil port and g oil port on the flow collecting regulating valve return oil together. At this time, if the situation of synchronous error superposition occurs, the inclined plane adjusting rod of the flow collecting regulating valve can be rotated to adjust the inclined plane covering area of the symmetrical through holes (f oil port, g oil port) to make the sum of the areas of the c, f oil ports and the d, g oil ports equal or maintain a certain ratio, eliminating the error superposition brought to the flow collecting during the flow splitting adjustment of the c oil port and d oil port of the flow splitting regulating valve and improving the flow collecting synchronous accuracy.

[0035] As Figure 2 shown, the synchronous valve of the present application works in two states, namely the flow splitting state and the flow collecting state.

[0036] (1) During the shunt state: The hydraulic oil enters the a port of the shunt regulating valve from the oil inlet, flows out through the symmetrically identical throttle holes (i.e., the c port and the d port) on the left and right of the shunt regulating valve. At the same time, it also enters the vertical channel through the b port of the shunt regulating valve. Under the action of the oil pressure in the vertical channel, the piston in the spool moves left and right apart, closing the collecting hole. The piston communicates with the side through holes of the spool (the shunt hole is used in the shunt condition), the side through holes of the variable throttle valve sleeve, and the oil passing groove. At this time, the steel ball in the collecting regulating valve is tightly pressed on the valve sleeve port 32 by the combined force of the oil pressure and the spring, and the oil is blocked and cannot flow. The pressure oil flowing out from the c port and the d port on the left and right sides of the shunt regulating valve enters the left and right pistons through the two horizontally symmetric first oil circuits on the left and right of the valve body, and flows to the two oil outlets and out of the oil outlets through the side through holes of the piston, the side through holes of the spool (the shunt hole is used in the shunt condition), and the side through holes of the variable throttle valve sleeve. When the load pressures at the two oil outlets are equal, the pressures on both sides of the spool are equal, and the pressure differences between the two symmetric c ports and d ports are equal. Therefore, the hydraulic flow is evenly divided into two parts and flows out equally. When the load pressure changes, such as Figure 1 when the pressure at the left oil outlet in Figure 1 increases, it will also cause the pressure on the left side of the spool to increase, and the pressure difference of the left c port becomes smaller. However, this increased pressure will push the spool to move to the right, increasing the oil outlet opening area of the side through hole of the variable throttle valve sleeve on the left side, reducing the pressure at the left end of the spool, and at the same time reducing the oil outlet opening area of the side through hole of the variable throttle valve sleeve on the right side, increasing the pressure at the right end of the spool. When the pressures at both ends of the spool reach equality again, the spool stops moving. At this time, the pressure differences of the c port and the d port are restored to equality, and the flow rate still returns to the average value and is not affected by the load pressure.

[0037] In actual use, due to inevitable manufacturing dimensional errors, changes in internal leakage caused by on-site oil temperature changes, frequent conversion of load pressures, etc., will greatly affect the synchronous shunt accuracy. At this time, the upper part of the shunt regulating rod on the shunt regulating valve can be rotated to change its inclined plane covering angle to correct the shunt error. At this time, the pressure oil leading to the collecting regulating valve in the lower part of the valve body is blocked by the steel ball and is in a static state, which does not affect the adjustment of the shunt accuracy.

[0038] (2) During the collecting state, the hydraulic oil enters from the two oil outlets. After the hydraulic oil enters the first oil circuit through the oil passing groove, the side through holes of the throttle regulating valve sleeve, the side through holes of the spool (collecting hole), and the side through holes of the piston, the hydraulic oil is divided into two paths. One path enters the shunt regulating valve through the first oil circuit, the c port and the d port of the shunt regulating valve, and finally flows back to the oil inlet through the a port of the shunt regulating valve. The other path enters the second oil circuit through the first oil circuit, enters the f port and the g port of the collecting regulating valve, enters the collecting regulating valve, then enters the vertical channel through the e port of the collecting regulating valve, and then flows back to the oil inlet through the b port and the a port of the shunt regulating valve.

[0039] In the current collecting state, the state of the current collecting regulating valve is that hydraulic oil enters the f oil port and the g oil port from the second oil passage. The reverse hydraulic pressure acts on the cut-off steel ball, overcoming the spring force to open the e oil port. The hydraulic oil flows into the vertical passage from the e oil port, passes through the middle through hole of the spool valve, the middle through hole of the variable throttle valve sleeve and the b oil port of the flow dividing regulating valve to enter the flow dividing regulating valve, and then flows back to the oil inlet of the synchronous valve from the a oil port. When the load pressures at the oil outlets of the two synchronous valves change under the current collecting condition, the pressure difference between the f oil port and the g oil port of the current collecting regulating valve will change with the change of the load pressure, and the corrected error flow rate will be affected by the change of the external load.

[0040] In the second technical solution, a second oil passage is added. The design of this oil passage can feedback the load change pressures at the two oil outlets under the current collecting condition to both sides of the spool valve. By sliding the spool valve left and right, the pressure difference between the f oil port and the g oil port of the current collecting regulating valve can be adjusted at any time to keep it constant, and the adjustment accuracy is not affected by the change of the external load pressure.

[0041] The above has schematically described the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and without departing from the content of the technical solution of the present invention, and design similar structural manners and implementations to the technical solution without creative work based on the technical essence of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An adjustable synchronous valve, characterized in that: The synchronization valve includes a valve body, a flow dividing regulating valve, a variable throttle valve sleeve, a spool valve, a piston, and a flow collecting regulating valve. A valve hole is machined inside the valve body, and the variable throttle valve sleeve is press-fitted in the valve hole. A spool valve is slidably connected inside the variable throttle valve sleeve. Two sliding pistons are installed inside the spool valve. At the center of the spool valve, there is a vertical and horizontal passage formed by the intersection of a horizontal passage and a vertical passage. An oil inlet is opened at the upper part of the valve body, and two oil outlets are opened at the lower part of the valve body. The oil inlet is communicated with the a oil port of the flow dividing regulating valve. The b oil port of the flow dividing regulating valve is communicated with the central through hole of the variable throttle valve sleeve, the central through hole of the spool valve, the vertical passage, and the e oil port of the flow collecting regulating valve. The horizontal passage is communicated with both sides of the spool valve. The c oil port and the d oil port on both sides of the flow dividing regulating valve are communicated with the inner holes of the two pistons through two horizontally symmetric first oil passages on the left and right. Side through holes are opened on the side walls on both sides of the piston, the spool valve, and the variable throttle valve sleeve. And the side through holes of the piston, the side through holes of the spool valve, and the side through holes of the variable throttle valve sleeve are communicated with each other and are respectively communicated with the two oil outlets through pipelines. The f oil port and the g oil port on both sides of the flow collecting regulating valve are respectively communicated with the two oil outlets.

2. The adjustable synchronous valve according to claim 1, characterized in that: The flow collecting regulating valve includes a plug, a flow collecting regulating valve sleeve, an inclined plane adjusting rod, a cut-off piece, and a spring. The plug is threadedly connected to the valve body, and the flow collecting regulating valve sleeve is in close contact with the plug. The inside of the flow collecting regulating valve sleeve is a stepped valve hole. A spring is installed at the lower part of the valve hole of the flow collecting regulating valve sleeve, and the spring abuts against the plug. The e oil port, the f oil port, and the g oil port are opened on the side wall of the flow collecting regulating valve sleeve. A cut-off piece is installed below the f oil port and the g oil port inside the flow collecting regulating valve sleeve. The e oil port is between the cut-off piece and the spring. The inclined plane adjusting rod is inserted into the flow collecting regulating valve sleeve, and the lower part of the inclined plane adjusting rod is an inclined plane corresponding to the f oil port and the g oil port.

3. An adjustable synchronous valve according to claim 2, characterized in that: The cut-off piece is a steel ball or a cone valve.

4. An adjustable synchronous valve according to claim 1, characterized in that: The flow dividing regulating valve includes a flow dividing regulating valve sleeve and a flow dividing adjusting rod. The flow dividing regulating valve sleeve is fixedly connected to the valve body. The a oil port, the b oil port, the c oil port, and the d oil port are opened on the side wall of the flow dividing regulating valve sleeve. The inside of the flow dividing regulating valve sleeve is a stepped hole. The lower part of the flow dividing adjusting rod is an inclined plane corresponding to the a oil port, the c oil port, and the d oil port.

5. An adjustable synchronous valve according to claim 1, characterized in that: An oil passing groove is opened at the position corresponding to the side through hole of the variable throttle valve sleeve on the outside of the variable throttle valve sleeve. The side through holes of the piston, the side through holes of the spool valve, and the side through holes of the variable throttle valve sleeve are respectively communicated with the two oil outlets through the oil passing groove.

6. An adjustable synchronous valve according to claim 1, characterized in that: The side through holes on both sides of the spool valve are two rows of through holes. The row of through holes close to the vertical passage is the flow collecting holes, and the row of through holes far from the vertical passage is the flow dividing holes.

7. An adjustable synchronous valve, characterized in that: The synchronization valve includes a valve body, a flow dividing regulating valve, a variable throttle valve sleeve, a spool valve, a piston, and a flow collecting regulating valve. A valve hole is machined inside the valve body. The variable throttle valve sleeve is press-fitted in the valve hole. A spool valve is slidably connected inside the variable throttle valve sleeve. Two sliding pistons are installed inside the spool valve. At the center of the spool valve, there is a vertical and horizontal passage formed by the intersection of a horizontal passage and a vertical passage. An oil inlet is opened at the upper part of the valve body, and two oil outlets are opened at the lower part of the valve body. The oil inlet is communicated with the a oil port of the flow dividing regulating valve. The b oil port of the flow dividing regulating valve is communicated with the central through hole of the variable throttle valve sleeve, the central through hole of the spool valve, the vertical passage, and the e oil port of the flow collecting regulating valve. The horizontal passage is communicated with both sides of the spool valve. The c oil port and the d oil port on both sides of the flow dividing regulating valve are communicated with the inner holes of the two pistons through two horizontally symmetric first oil passages on the left and right. Side through holes are opened on the side walls on both the left and right sides of the piston, the spool valve, and the variable throttle valve sleeve. The side through holes of the piston, the side through holes of the spool valve, and the side through holes of the variable throttle valve sleeve are communicated with each other and are respectively connected to the two oil outlets through pipelines. The f oil port and the g oil port on both sides of the flow collecting regulating valve are respectively connected to the first oil passage through two horizontally symmetric second oil passages on both sides on the left and right.

8. An adjustable synchronous valve according to claim 7, characterized in that: The flow collecting regulating valve includes a plug, a flow collecting regulating valve sleeve, an inclined plane adjusting rod, a cut-off piece, and a spring. The plug is threadedly connected to the valve body, and the flow collecting regulating valve sleeve is in close contact with the plug. The inside of the flow collecting regulating valve sleeve is a stepped valve hole. A spring is installed at the lower part of the valve hole of the flow collecting regulating valve sleeve, and the spring abuts against the plug. The e oil port, the f oil port, and the g oil port are opened on the side wall of the flow collecting regulating valve sleeve. The cut-off piece is installed below the f oil port and the g oil port inside the flow collecting regulating valve sleeve. The e oil port is located between the cut-off piece and the spring. The inclined plane adjusting rod is inserted into the flow collecting regulating valve sleeve, and the lower part of the inclined plane adjusting rod is an inclined plane corresponding to the f oil port and the g oil port.

9. An adjustable synchronous valve according to claim 8, characterized in that: The cut-off piece is a steel ball or a cone valve.

10. An adjustable synchronous valve according to claim 7, characterized in that: The flow dividing regulating valve includes a flow dividing regulating valve sleeve and a flow dividing adjusting rod. The flow dividing regulating valve sleeve is fixedly connected to the valve body. The a oil port, the b oil port, the c oil port, and the d oil port are opened on the side wall of the flow dividing regulating valve sleeve. The inside of the flow dividing regulating valve sleeve is a stepped hole. The lower part of the flow dividing adjusting rod is an inclined plane corresponding to the a oil port, the c oil port, and the d oil port.

11. An adjustable synchronous valve according to claim 7, characterized in that: An oil passing groove is opened at a position on the outer side of the variable throttle valve sleeve corresponding to the side through hole of the variable throttle valve sleeve. The side through hole of the piston, the side through hole of the spool valve, and the side through hole of the variable throttle valve sleeve are respectively connected to the two oil outlets through the oil passing groove.

12. An adjustable synchronous valve according to claim 7, characterized in that: The side through holes on both sides of the spool valve are two rows of through holes. The row of through holes close to the vertical passage is the flow collecting holes, and the row of through holes far from the vertical passage is the flow dividing holes.

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