CN210637304U - Balance valve with double-flow control - Google Patents
Balance valve with double-flow control Download PDFInfo
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- CN210637304U CN210637304U CN201921328120.9U CN201921328120U CN210637304U CN 210637304 U CN210637304 U CN 210637304U CN 201921328120 U CN201921328120 U CN 201921328120U CN 210637304 U CN210637304 U CN 210637304U
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Abstract
The utility model provides a balanced valve with double flow control, including balanced valve and the relief valve of setting in the main valve body, balanced valve and relief valve all are equipped with 2, are first balanced valve and second balanced valve, first relief valve and second relief valve respectively, first balanced valve and first relief valve constitute less flow balance valve subassembly, the second balanced valve constitutes great flow balance valve subassembly with the second relief valve; the main valve body is provided with 4 oil ports, namely a first oil port, a second oil port, a third oil port and a fourth oil port. The utility model discloses there are two kinds of flow control, but two sets of hydro-cylinders of simultaneous control, through the feedback to the load, the size of the balanced case aperture of control to the velocity of motion of control hydro-cylinder has increased the relief valve simultaneously, surpasss relief valve settlement pressure when the load, and fluid passes through the relief valve overflow.
Description
Technical Field
The utility model relates to a control valve field specifically, relates to a balanced valve with double flow control.
Background
In the fields of engineering machinery, construction machinery, hoisting and transporting machinery and the like, the balance valve is used for effectively preventing the vertical hydraulic cylinder and a vertical working part from automatically sliding downwards due to dead weight or overspeed movement due to dead weight in descending movement, and the balance valve is used for balancing the pressure of two cavities of the oil cylinder when the erecting oil cylinder acts so as to keep the working load of the erecting oil cylinder to be positive and negative load, thereby ensuring that the action of the erecting oil cylinder is not out of control.
With the continuous development of society, in some specific areas, higher requirements are provided for the controllability (such as stability, jogging property and accuracy) of a balance valve, most of the existing flow type balance valves are composed of a throttle valve and a one-way valve, and the flow change caused by load change cannot be effectively controlled.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a balanced valve with double flow control, the utility model discloses a novel balanced valve of development on ordinary flow type balanced valve basis comprises the balanced valve subassembly of two kinds of different flows by main valve body, first relief valve, first balanced valve, second relief valve and second balanced valve, can satisfy multiple demand.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
a balance valve with double flow control comprises a balance valve arranged in a main valve body 9 and safety valves matched with the balance valve, wherein the number of the balance valve and the safety valves is 2, namely a first balance valve 2, a second balance valve 4, a first safety valve 1 and a second safety valve 3, the first safety valve 1, the first balance valve 2, the second safety valve 3 and the second balance valve 4 are sequentially arranged in the main valve body 9 from top to bottom and are assembled with the main valve body 9 in a clearance fit mode on the same vertical axis into a whole, the first balance valve 2 and the first safety valve 1 form a small flow balance valve assembly, and the second balance valve 4 and the second safety valve 3 form a large flow balance valve assembly; the main valve body 9 is provided with 4 oil ports, namely a first oil port 5, a second oil port 6, a third oil port 7 and a fourth oil port 8, wherein the first oil port 5 and the third oil port 7 are oil inlet and outlet ports of a small-flow balance valve assembly, and the second oil port 6 and the fourth oil port 8 are oil inlet and outlet ports of a large-flow balance valve assembly. Each group of balance valves is provided with a safety valve, when the pressure exceeds the set pressure of the safety valve, oil can overflow through the safety valve, and each group of balance valve components is provided with a positive oil port and a negative oil port.
Preferably, the first safety valve 1 comprises a first safety valve adjusting rod 12 and a first safety valve guide sleeve 16; the left end of the first safety valve adjusting rod 12 is abutted against a first safety valve left end cover 11, and the right end is provided with a first safety valve spring 13; the right end of the first safety valve guide sleeve 16 is abutted against a first safety valve right end cover 17, the left end of the first safety valve guide sleeve is provided with a first safety valve seat 14, the first safety valve seat 14 and the first safety valve guide sleeve 16 are in clearance fit with the main valve body 9, an accommodating cavity for arranging a first safety valve core 15 is formed, and the left end of the first safety valve core 15 is provided with a second safety valve spring 18; a first safety valve spring cavity is formed between the left end of the first safety valve seat 14 and the right end of the first safety valve left end cover 11, and the first safety valve seat 14 is made of flexible materials;
the second safety valve 3 comprises a second safety valve adjusting rod 32 and a second safety valve guide sleeve 36; the left end of the second safety valve adjusting rod 32 is abutted against the left end cover 31 of the second safety valve, and the right end is provided with a third safety valve spring 33; the right end of the second safety valve guide sleeve 36 is abutted against a second safety valve right end cover 37, the left end of the second safety valve guide sleeve 36 is provided with a second safety valve seat 34, the second safety valve seat 34 and the second safety valve guide sleeve 36 are in clearance fit with the main valve body 9, an accommodating cavity for arranging a second safety valve core 35 is formed, and the left end of the second safety valve core 35 is provided with a fourth safety valve spring 38; a second safety valve spring cavity is formed between the left end of the second safety valve seat 34 and the right end of the second safety valve adjusting rod 32, and the second safety valve seat 34 is made of flexible material poly-milled imide. The flexible sealing valve seat ensures no leakage, the valve can be closed even if the spring is broken, the hysteresis is small, and zero leakage of the safety valve is ensured.
Preferably, the first counter-valve 2 comprises a first control piston sleeve 25 and a first counter-valve guide sleeve 214; a first control piston 22 is arranged in a cavity of the first control piston sleeve 25, a first control piston small spring 24 and a first control piston large spring 23 are sequentially sleeved outside the first control piston 22, and the left ends of the first control piston sleeve 25 and the first control piston 22 are abutted against a first control piston end cover 21; the first balance valve guide sleeve 214 and the first seal valve seat 28 and the first balance valve rear end cover 212 arranged at the left and right ends thereof form an accommodating cavity, a first balance valve core 27 and a first balance valve sleeve rear cover 211 are arranged in the accommodating cavity, a first pilot valve core 26 is arranged in the first balance valve core 27, the left end of the first pilot valve core 26 is abutted to the right end of the first control piston 22 in the cavity of the first balance valve core 27, the middle part of the first pilot valve core is sleeved with a second seal valve seat 29 and a first pilot valve guide sleeve 213, the right end of the first pilot valve core is sleeved with a first pilot valve core spring 210, and the first pilot valve core spring 210 is contained in the accommodating cavity formed by the first balance valve core 27 and the first balance valve sleeve rear cover 211; the first control piston sleeve 25, the first sealing valve seat 28 and the first balancing valve guide 214 are in clearance fit with the main valve body 9;
the second balancing valve 4 comprises a second control piston sleeve 45 and a second balancing valve guide sleeve 414; a second control piston 42 is arranged in a cavity of the second control piston sleeve 45, a second control piston small spring 44 and a second control piston large spring 43 are sequentially sleeved outside the second control piston 42, and the left ends of the second control piston sleeve 45 and the second control piston 42 are abutted against a second control piston end cover 41; the second balance valve guide sleeve 414 and a third seal valve seat 48 and a second balance valve rear end cover 412 which are arranged at the left and right ends of the second balance valve guide sleeve 414 form an accommodating cavity, a second balance valve core 47 and a second balance valve sleeve rear cover 411 are arranged in the accommodating cavity, a second pilot valve core 46 is arranged in the second balance valve core 47, the left end of the second pilot valve core 46 is abutted with the right end of the second control piston 42 in the cavity of the second balance valve core 47, a fourth seal valve seat 49 and a second pilot valve guide sleeve 413 are sleeved at the middle part of the second pilot valve core 46, a second pilot valve core spring 410 is sleeved at the right end of the second pilot valve core 46, and the second pilot valve core spring 410 is contained in an accommodating cavity formed by the second balance valve core 47 and the second balance; the second control piston sleeve 45, the third sealing valve seat 48 and the second balancing valve guide 414 are in clearance fit with the main valve body 9.
Preferably, the contact surfaces of the first safety valve left end cover 11, the first safety valve seat 14, the first safety valve guide sleeve 16, the first control piston end cover 21, the first control piston sleeve 25, the first seal valve seat 28, the first balance valve rear end cover 212, the second safety valve left end cover 31, the second safety valve seat 34, the second safety valve guide sleeve 36, the second control piston end cover 41, the second control piston sleeve 45, the third seal valve seat 48, the second balance valve rear end cover 412 and the main valve body 9 are all provided with O-ring seals 50, and the contact surfaces of the first safety valve adjusting rod 12, the first safety valve left end cover 11, the second safety valve adjusting rod 32, the second safety valve left end cover 31, the second seal valve seat 29, the first balance valve core 27, and the fourth seal valve seat 49 and the second balance valve core 47 are all provided with O-ring seals 50; the contact surfaces of the first safety valve left end cover 11, the first safety valve guide sleeve 16, the second safety valve left end cover 31, the second safety valve guide sleeve 36 and the main valve body 9 are all provided with retaining rings 51, and the contact surfaces of the first safety valve adjusting rod 12 and the first safety valve left end cover 11, and the contact surfaces of the second safety valve adjusting rod 32 and the second safety valve left end cover 31 are all provided with retaining rings 51; the contact surfaces of the first safety valve spool 15 and the first safety valve guide sleeve 16, and the contact surfaces of the second safety valve spool 35 and the second safety valve guide sleeve 36 are provided with T-shaped Tekang Grey rings 52.
Preferably, the first safety valve right end cover 17, the first control piston end cover 21, the second safety valve right end cover 37 and the second control piston end cover 41 are all connected and fixed with the main valve body 9 through an inner hexagon screw 53, and a spring washer 54 is sleeved on the inner hexagon screw 53; a nut 55 is arranged on the outer side of the contact end of the left end of the first safety valve adjusting rod 12 and the left end cover 11 of the first safety valve, and a nut 55 is arranged on the outer side of the contact end of the left end of the second safety valve adjusting rod 32 and the left end cover 31 of the second safety valve.
Preferably, damping screws 56 are arranged at contact ends of the first control piston 22 and the first control piston end cover 21, and contact ends of the second control piston 42 and the second control piston end cover 41, and a steel ball 510 is arranged at the right end of each damping screw 56; adjusting screws 57 are arranged in the first control piston end cover 21 and the second control piston end cover 41, the adjusting screws 57 are arranged in adjusting screw seats 58, nuts 55 are arranged on the outer sides of contact ends of the tail ends of the adjusting screws and the adjusting screw seats 58, and O-shaped sealing rings 50 are arranged on contact surfaces of the adjusting screws 57 and the nuts 55, and contact surfaces of the nuts 55 and the first control piston end cover 21 or the second control piston end cover 41.
Preferably, the first oil port 5, the second oil port 6, the third oil port 7 and the fourth oil port 8 are tube valves, and are all fixed on the action surface of the main valve body 9 through hexagon socket head cap screws 53, and the oil ports are all connected with an external pipeline through flanges, and the flanges include transition flanges 511 and split flanges 512; the first oil port 5 and the second oil port 6 are arranged on the front acting surface of the main valve body, and the third oil port 7 and the fourth oil port 8 are arranged on the rear acting surface of the main valve body. The balance valve component is provided with a front oil port and a back oil port which are respectively arranged on the symmetrical acting surface of the main valve body.
Preferably, the main valve body 9 is provided with a first oil passage hole 513, a second oil passage hole 514, and a third oil passage hole 515; the first relief valve spring chamber, the oil hole in the first control piston bush 25, the second relief valve spring chamber, and the oil hole in the second control piston bush 45 are sequentially communicated through a first oil passage hole 513; the oil hole in the first relief valve guide sleeve 16 and the oil hole in the first balanced valve guide sleeve 214 are communicated through a second oil passage hole 514; the oil holes in the second relief valve guide sleeve 36 and the oil holes in the second balanced valve guide sleeve 414 are communicated through a third oil passage hole 515; the oil hole in the first balanced valve guide sleeve 214 is communicated with a third oil port 7, the oil hole in the second balanced valve guide sleeve 414 is communicated with a fourth oil port 8, the oil ports in the first and second seal valve seats 28 and 29 are communicated with a first oil port 5, and the oil ports in the third and fourth seal valve seats 48 and 49 are communicated with a second oil port 6.
Preferably, the main valve body 9 is fixed to the top plate 10 by an inner hexagonal screw 53, is fixed to the side plate by an inner hexagonal plug 59, and the first oil port 5 and the third oil port 7 are fixed to the top plate 10 by the inner hexagonal plug 59.
Preferably, the first balance valve 2 and the second balance valve 4 are formed by connecting balance valves and one-way valves in parallel and are assembled into a whole on the same transverse axis. The non-leakage balance valve with the initial pressure reduction function and the one-way valve of the bypass are assembled into a whole on the same axis, the structure is compact, and the occupied space is small.
The working principle of the first safety valve is as follows: the set pressure of the safety valve is set by moving the first safety valve adjusting rod 12 at the left end to adjust the first safety valve spring 13, and after the pressure is set, if the load passing through the first safety valve exceeds the set pressure of the first safety valve, the first safety valve spool 15 is opened, and the oil overflows through the first safety valve spring cavity.
The working principle of the second safety valve is as follows: the set pressure of the relief valve is set by adjusting the second relief valve spring 33 by moving the second relief valve adjusting lever 32 at the left end, and after the pressure is set, if the load through the second relief valve exceeds the set pressure of the second relief valve, the second relief valve spool 35 is opened, and the oil overflows through the second relief valve spring chamber.
The working principle of the first balance valve as a one-way valve is as follows: when oil enters from the first oil port 5, the first balanced valve element 27 is directly opened, and the oil passes through the oil hole in the first balanced valve guide sleeve 214 and flows out from the third oil port 7.
The second balance valve is used as a working principle of a one-way valve: when oil enters from the second oil port 6, the second balanced valve element 47 is directly opened, and the oil flows out from the fourth oil port 8 through the oil hole in the second balanced valve guide sleeve 414.
The working principle of the first balance valve as a balance valve is as follows: when oil enters from the third oil port 7, the second oil port 6 becomes an oil inlet of another oil path, a part of the oil entering from the second oil port 6 enters the left end of the first control piston 22 through an oil path hole of the main valve body, the first control piston 22 is pushed to open the first pilot valve core 26 through the pressure difference between two ends of a damping hole on the first control piston 22, the oil enters the oil hole of the first pilot valve core 26 through the oil holes in the first balance valve core 27 and the first pilot valve guide sleeve 213, then enters the first oil port 5 through the oil port in the second seal valve seat 29, and a small flow of oil flows out from the first oil port 5; when the load is increased, the first balanced valve core 27 is opened by the pressure difference between the two ends, and a large flow of oil enters the oil hole in the first sealed valve seat 28 through the oil hole in the first balanced valve guide sleeve 214 and flows out of the first oil hole 5.
The working principle of the first balance valve as a balance valve is as follows: when oil enters from the fourth oil port 8, the first oil port 5 becomes an oil inlet of another oil path, a part of the oil entering from the first oil port 5 enters the left end of the second control piston 42 through an oil path hole of the main valve body, the second control piston 42 is pushed to open the second pilot valve core 46 through the pressure difference between two ends of a damping hole on the second control piston 42, the oil enters the oil hole of the second pilot valve core 46 through the second balance valve core 49 and the oil hole in the second pilot valve guide sleeve 413, and then enters the second oil port 6 through the oil port in the fourth seal valve seat 49, and the small-flow oil flows out from the second oil port 6. When the load is increased, the second balanced valve core 49 is opened by the pressure difference between the two ends, and a large flow of oil enters the oil hole in the third sealed valve seat 48 through the oil hole in the balanced valve guide sleeve 414 and flows out of the second oil port 6.
The oil ports of the first balance valve 2 are a first oil port 5 and a third oil port 7, when oil flows from the first oil port 5 to the third oil port 7, the first balance valve 2 is equivalent to a one-way valve, and the maximum flow of the oil flowing from the first oil port 5 to the third oil port 7 is 250L/min; when the oil flows from the third port 7 to the first port 5, the displacement of the first balanced valve element 27 is changed by controlling the port pressure, so as to change the opening of the valve port and control the flow from the third port 7 to the first port 5, and the maximum flow from the third port 7 to the first port 5 is 150L/min.
The oil ports of the second balance valve 4 are a second oil port 6 and a fourth oil port 8, when oil flows from the second oil port 6 to the fourth oil port 8, the second balance valve 4 is equivalent to a one-way valve, and the maximum flow of the oil flowing from the second oil port 6 to the fourth oil port 8 is 400L/min; when the oil flows from the fourth port 8 to the second port 6, the displacement of the second balanced valve element 47 is changed by controlling the pressure of the ports, so that the opening of the valve port is changed, the flow from the fourth port 8 to the second port 6 is controlled, and the maximum flow of the oil flowing from the fourth port 8 to the second port 6 is 250L/min.
The above is double flow control, because the diameter of the valve core of the first balance valve is smaller than that of the second balance valve, and the flow area of the valve port is smaller than that of the second balance valve, the flow passing through the two balance valves is respectively small flow and large flow.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model relates to a balanced valve with double flow control has two kinds of flow control, can control two sets of hydro-cylinders simultaneously, through the feedback to the load, controls the size of balanced case aperture to the moving speed of control hydro-cylinder opens the pilot valve core in the balanced valve subassembly when the load hour, and only little flow passes through, when the load increases, opens the balanced case through balanced case both ends pressure differential, but large-traffic passes through;
(2) the utility model relates to a balanced valve with double flow control has increased the relief valve part simultaneously, when the load exceeded the relief valve settlement pressure, the fluid overflowed through the relief valve;
(3) the utility model relates to a balance valve with double flow control, which has wide application range and is suitable for the safety protection of cranes, cranes and supporting devices;
(4) the utility model relates to a balance valve with double flow control, which has zero leakage load protection, working pressure up to 420bar and triple safety protection measures;
(5) the utility model relates to a balanced valve with double flow control, the first relief valve and the first balanced valve constitute the less flow balanced valve subassembly, the second relief valve and the second balanced valve constitute the bigger flow balanced valve subassembly, have relief valve, check valve, balanced valve three kinds of functions respectively, satisfy multiple user demand;
(6) the utility model relates to a balance valve with double flow control, the balance valve is integrally assembled by a non-leakage balance valve with initial pressure reduction function and a one-way valve of a bypass on the same axis, the structure is compact, and the space occupation is small;
(7) the utility model relates to a balanced valve with double flow control, the control piston adopts the dual spring control in the balanced valve, can effectively reduce the yawing force of hydraulic power to the control piston, maintains the flow stability, still is provided with damping screw and steel ball on the control piston, and damping screw and steel ball mutually support, effectively balance control piston left and right ends pressure and reduce the influence of hydraulic power to control piston stability;
(8) the utility model relates to a balance valve with double flow control, which has simple structure, smart design and obvious effect;
(9) the utility model relates to a balanced valve with double flow control, easily processing and assembly, it is with low costs, the practicality is strong, is fit for promoting on a large scale.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic cross-sectional structural view of a balancing valve with dual flow control;
FIG. 2 is a schematic sectional view of the first relief valve;
FIG. 3 is a schematic cross-sectional structural view of a first balancing valve;
FIG. 4 is a schematic sectional view of the second relief valve;
FIG. 5 is a schematic cross-sectional structural view of a second balancing valve;
FIG. 6 is a schematic diagram of a structural elevation of a balancing valve with dual flow control;
FIG. 7 is a partial schematic piping diagram of a balancing valve with dual flow control;
FIG. 8 is a schematic view in partial cross-section of a balancing valve with dual flow control;
FIG. 9 is a schematic view of the interface installation of a balanced valve with dual flow control;
FIG. 10 is a schematic illustration of the internal flow path of a balanced valve with dual flow control.
In the figure, 1-a first safety valve, 2-a first balance valve, 3-a second safety valve, 4-a second balance valve, 5-a first oil port, 6-a second oil port, 7-a third oil port, 8-a fourth oil port, 9-a main valve body, 10-a top plate, 11-a first safety valve left end cover, 12-a first safety valve adjusting rod, 13-a first safety valve spring, 14-a first safety valve seat, 15-a first safety valve core, 16-a first safety valve guide sleeve, 17-a first safety valve right end cover, 18-a second safety valve spring,
21-a first control piston end cover, 22-a first control piston, 23-a first control piston large spring, 24-a first control piston small spring, 25-a first control piston sleeve, 26-a first pilot valve core, 27-a first balance valve core, 28-a first sealing valve seat, 29-a second sealing valve seat, 210-a first pilot valve core spring, 211-a first balance valve sleeve rear cover, 212-a first balance valve rear end cover, 213-a first pilot valve guide sleeve, 214-a first balance valve guide sleeve,
31-a left end cover of a second safety valve, 32-a regulating rod of the second safety valve, 33-a third safety valve spring, 34-a valve seat of the second safety valve, 35-a valve core of the second safety valve, 36-a guide sleeve of the second safety valve, 37-a right end cover of the second safety valve, 38-a fourth safety valve spring,
41-a second control piston end cover, 42-a second control piston, 43-a second control piston large spring, 44-a second control piston small spring, 45-a second control piston sleeve, 46-a second pilot valve core, 47-a second balanced valve core, 48-a third sealing valve seat, 49-a fourth sealing valve seat, 410-a second pilot valve core spring, 411-a second balanced valve sleeve rear cover, 412-a second balanced valve rear end cover, 413-a second pilot valve guide sleeve, 414-a second balanced valve guide sleeve,
the oil pump comprises a 50-O-shaped sealing ring, a 51-retaining ring, a 52-T-shaped Tekang Gla ring, a 53-inner hexagonal screw, a 54-spring washer, a 55-nut, a 56-damping screw, a 57-adjusting screw, a 58-adjusting screw seat, a 59-inner hexagonal plug, a 510-steel ball, a 511-transition flange, a 512-split flange, a 513-first oil way hole, a 514-second oil way hole and a 515-third oil way hole.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
The present embodiment provides a balanced valve with dual flow control, the structure of which is shown in detail in figures 1-10: the balance valve and the safety valve are respectively provided with 2, namely a first balance valve 2, a second balance valve 4, a first safety valve 1 and a second safety valve 3, the first safety valve 1, the first balance valve 2, the second safety valve 3 and the second balance valve 4 are sequentially arranged in the main valve body 9 from top to bottom and are assembled with the main valve body 9 on the same vertical axis in a clearance fit mode, the first balance valve 2 and the first safety valve 1 form a small flow balance valve assembly, and the second balance valve 4 and the second safety valve 3 form a large flow balance valve assembly; the main valve body 9 is provided with 4 oil ports, namely a first oil port 5, a second oil port 6, a third oil port 7 and a fourth oil port 8, wherein the first oil port 5 and the third oil port 7 are oil inlet and outlet ports of a small-flow balance valve assembly, and the second oil port 6 and the fourth oil port 8 are oil inlet and outlet ports of a large-flow balance valve assembly. Each group of balance valves is provided with a safety valve, when the pressure exceeds the set pressure of the safety valve, oil can overflow through the safety valve, and each group of balance valve components is provided with a positive oil port and a negative oil port.
Further, the first safety valve 1 comprises a first safety valve adjusting rod 12 and a first safety valve guide sleeve 16; the left end of the first safety valve adjusting rod 12 is abutted against a first safety valve left end cover 11, and the right end is provided with a first safety valve spring 13; the right end of the first safety valve guide sleeve 16 is abutted against a first safety valve right end cover 17, the left end of the first safety valve guide sleeve is provided with a first safety valve seat 14, the first safety valve seat 14 and the first safety valve guide sleeve 16 are in clearance fit with the main valve body 9, an accommodating cavity for arranging a first safety valve core 15 is formed, and the left end of the first safety valve core 15 is provided with a second safety valve spring 18; a first safety valve spring cavity is formed between the left end of the first safety valve seat 14 and the right end of the first safety valve left end cover 11, and the first safety valve seat 14 is made of flexible materials;
the second safety valve 3 comprises a second safety valve adjusting rod 32 and a second safety valve guide sleeve 36; the left end of the second safety valve adjusting rod 32 is abutted against the left end cover 31 of the second safety valve, and the right end is provided with a third safety valve spring 33; the right end of the second safety valve guide sleeve 36 is abutted against a second safety valve right end cover 37, the left end of the second safety valve guide sleeve 36 is provided with a second safety valve seat 34, the second safety valve seat 34 and the second safety valve guide sleeve 36 are in clearance fit with the main valve body 9, an accommodating cavity for arranging a second safety valve core 35 is formed, and the left end of the second safety valve core 35 is provided with a fourth safety valve spring 38; a second safety valve spring cavity is formed between the left end of the second safety valve seat 34 and the right end of the second safety valve adjusting rod 32, and the second safety valve seat 34 is made of flexible material poly-milled imide. The flexible sealing valve seat ensures no leakage, the valve can be closed even if the spring is broken, the hysteresis is small, the zero leakage of the safety valve is ensured,
further, the first balance valve 2 comprises a first control piston sleeve 25 and a first balance valve guide sleeve 214; a first control piston 22 is arranged in a cavity of the first control piston sleeve 25, a first control piston small spring 24 and a first control piston large spring 23 are sequentially sleeved outside the first control piston 22, and the left ends of the first control piston sleeve 25 and the first control piston 22 are abutted against a first control piston end cover 21; the first balance valve guide sleeve 214 and the first seal valve seat 28 and the first balance valve rear end cover 212 arranged at the left and right ends thereof form an accommodating cavity, a first balance valve core 27 and a first balance valve sleeve rear cover 211 are arranged in the accommodating cavity, a first pilot valve core 26 is arranged in the first balance valve core 27, the left end of the first pilot valve core 26 is abutted to the right end of the first control piston 22 in the cavity of the first balance valve core 27, the middle part of the first pilot valve core is sleeved with a second seal valve seat 29 and a first pilot valve guide sleeve 213, the right end of the first pilot valve core is sleeved with a first pilot valve core spring 210, and the first pilot valve core spring 210 is contained in the accommodating cavity formed by the first balance valve core 27 and the first balance valve sleeve rear cover 211; the first control piston sleeve 25, the first sealing valve seat 28 and the first balancing valve guide 214 are in clearance fit with the main valve body 9;
the second balancing valve 4 comprises a second control piston sleeve 45 and a second balancing valve guide sleeve 414; a second control piston 42 is arranged in a cavity of the second control piston sleeve 45, a second control piston small spring 44 and a second control piston large spring 43 are sequentially sleeved outside the second control piston 42, and the left ends of the second control piston sleeve 45 and the second control piston 42 are abutted against a second control piston end cover 41; the second balance valve guide sleeve 414 and a third seal valve seat 48 and a second balance valve rear end cover 412 which are arranged at the left and right ends of the second balance valve guide sleeve 414 form an accommodating cavity, a second balance valve core 47 and a second balance valve sleeve rear cover 411 are arranged in the accommodating cavity, a second pilot valve core 46 is arranged in the second balance valve core 47, the left end of the second pilot valve core 46 is abutted with the right end of the second control piston 42 in the cavity of the second balance valve core 47, a fourth seal valve seat 49 and a second pilot valve guide sleeve 413 are sleeved at the middle part of the second pilot valve core 46, a second pilot valve core spring 410 is sleeved at the right end of the second pilot valve core 46, and the second pilot valve core spring 410 is contained in an accommodating cavity formed by the second balance valve core 47 and the second balance; the second control piston sleeve 45, the third sealing valve seat 48 and the second balancing valve guide 414 are in clearance fit with the main valve body 9.
Further, the contact surfaces of the first safety valve left end cover 11, the first safety valve seat 14, the first safety valve guide sleeve 16, the first control piston end cover 21, the first control piston sleeve 25, the first seal valve seat 28, the first balance valve rear end cover 212, the second safety valve left end cover 31, the second safety valve seat 34, the second safety valve guide sleeve 36, the second control piston end cover 41, the second control piston sleeve 45, the third seal valve seat 48, the second balance valve rear end cover 412 and the main valve body 9 are all provided with O-ring seals 50, and the contact surfaces of the first safety valve adjusting rod 12, the first safety valve left end cover 11, the second safety valve adjusting rod 32, the second safety valve left end cover 31, the second seal valve seat 29, the first balance valve core 27, and the fourth seal valve seat 49, and the second balance valve core 47 are all provided with O-ring seals 50; the contact surfaces of the first safety valve left end cover 11, the first safety valve guide sleeve 16, the second safety valve left end cover 31, the second safety valve guide sleeve 36 and the main valve body 9 are all provided with retaining rings 51, and the contact surfaces of the first safety valve adjusting rod 12 and the first safety valve left end cover 11, and the contact surfaces of the second safety valve adjusting rod 32 and the second safety valve left end cover 31 are all provided with retaining rings 51; the contact surfaces of the first safety valve spool 15 and the first safety valve guide sleeve 16, and the contact surfaces of the second safety valve spool 35 and the second safety valve guide sleeve 36 are provided with T-shaped Tekang Grey rings 52.
Further, the first safety valve right end cover 17, the first control piston end cover 21, the second safety valve right end cover 37 and the second control piston end cover 41 are all connected and fixed with the main valve body 9 through an inner hexagon screw 53, and a spring washer 54 is sleeved on the inner hexagon screw 53; a nut 55 is arranged on the outer side of the contact end of the left end of the first safety valve adjusting rod 12 and the left end cover 11 of the first safety valve, and a nut 55 is arranged on the outer side of the contact end of the left end of the second safety valve adjusting rod 32 and the left end cover 31 of the second safety valve.
Further, damping screws 56 are arranged at contact ends of the first control piston 22 and the first control piston end cover 21, and contact ends of the second control piston 42 and the second control piston end cover 41, and a steel ball 510 is arranged at the right end of each damping screw 56; adjusting screws 57 are arranged in the first control piston end cover 21 and the second control piston end cover 41, the adjusting screws 57 are arranged in adjusting screw seats 58, nuts 55 are arranged on the outer sides of contact ends of the tail ends of the adjusting screws and the adjusting screw seats 58, and O-shaped sealing rings 50 are arranged on contact surfaces of the adjusting screws 57 and the nuts 55, and contact surfaces of the nuts 55 and the first control piston end cover 21 or the second control piston end cover 41.
Further, the first oil port 5, the second oil port 6, the third oil port 7 and the fourth oil port 8 are tube valves, all fixed on the action surface of the main valve body 9 through hexagon socket head cap screws 53, and all connected with an external pipeline through flanges, the flanges include transition flanges 511 and split flanges 512; the first oil port 5 and the second oil port 6 are arranged on the front acting surface of the main valve body, and the third oil port 7 and the fourth oil port 8 are arranged on the rear acting surface of the main valve body. The balance valve component is provided with a front oil port and a back oil port which are respectively arranged on the symmetrical acting surface of the main valve body.
Further, a first oil passage hole 513, a second oil passage hole 514, and a third oil passage hole 515 are formed in the main valve body 9; the first relief valve spring chamber, the oil hole in the first control piston bush 25, the second relief valve spring chamber, and the oil hole in the second control piston bush 45 are sequentially communicated through a first oil passage hole 513; the oil hole in the first relief valve guide sleeve 16 and the oil hole in the first balanced valve guide sleeve 214 are communicated through a second oil passage hole 514; the oil holes in the second relief valve guide sleeve 36 and the oil holes in the second balanced valve guide sleeve 414 are communicated through a third oil passage hole 515; the oil hole in the first balanced valve guide sleeve 214 is communicated with a third oil port 7, the oil hole in the second balanced valve guide sleeve 414 is communicated with a fourth oil port 8, the oil ports in the first and second seal valve seats 28 and 29 are communicated with a first oil port 5, and the oil ports in the third and fourth seal valves (48 and 49) are communicated with a second oil port 6.
Further, the main valve body 9 is fixed to the top plate 10 through an inner hexagonal screw 53 and fixed to the side plate through an inner hexagonal plug 59, and the first oil port 5 and the third oil port 7 are fixed to the top plate 10 through the inner hexagonal plug 59.
Further, the first balance valve 2 and the second balance valve 4 are formed by connecting balance valves and one-way valves in parallel and are assembled into a whole on the same transverse axis. The non-leakage balance valve with the initial pressure reduction function and the one-way valve of the bypass are assembled into a whole on the same axis, the structure is compact, and the occupied space is small.
The working principle of the first safety valve is as follows: the set pressure of the safety valve is set by moving the first safety valve adjusting rod 12 at the left end to adjust the first safety valve spring 13, and after the pressure is set, if the load passing through the first safety valve exceeds the set pressure of the first safety valve, the first safety valve spool 15 is opened, and the oil overflows through the first safety valve spring cavity.
The working principle of the second safety valve is as follows: the set pressure of the relief valve is set by adjusting the second relief valve spring 33 by moving the second relief valve adjusting lever 32 at the left end, and after the pressure is set, if the load through the second relief valve exceeds the set pressure of the second relief valve, the second relief valve spool 35 is opened, and the oil overflows through the second relief valve spring chamber.
The working principle of the first balance valve as a one-way valve is as follows: when oil enters from the first oil port 5, the first balanced valve element 27 is directly opened, and the oil passes through the oil hole in the first balanced valve guide sleeve 214 and flows out from the third oil port 7.
The second balance valve is used as a working principle of a one-way valve: when oil enters from the second oil port 6, the second balanced valve element 47 is directly opened, and the oil flows out from the fourth oil port 8 through the oil hole in the second balanced valve guide sleeve 414.
The working principle of the first balance valve as a balance valve is as follows: when oil enters from the third oil port 7, the second oil port 6 becomes an oil inlet of another oil path, a part of the oil entering from the second oil port 6 enters the left end of the first control piston 22 through an oil path hole of the main valve body, the first control piston 22 is pushed to open the first pilot valve core 26 through the pressure difference between two ends of a damping hole on the first control piston 22, the oil enters the oil hole of the first pilot valve core 26 through the oil holes in the first balance valve core 27 and the first pilot valve guide sleeve 213, then enters the first oil port 5 through the oil port in the second seal valve seat 29, and a small flow of oil flows out from the first oil port 5; when the load is increased, the first balanced valve core 27 is opened by the pressure difference between the two ends, and a large flow of oil enters the oil hole in the first sealed valve seat 28 through the oil hole in the first balanced valve guide sleeve 214 and flows out of the first oil hole 5.
The working principle of the first balance valve as a balance valve is as follows: when oil enters from the fourth oil port 8, the first oil port 5 becomes an oil inlet of another oil path, a part of the oil entering from the first oil port 5 enters the left end of the second control piston 42 through an oil path hole of the main valve body, the second control piston 42 is pushed to open the second pilot valve core 46 through the pressure difference between two ends of a damping hole on the second control piston 42, the oil enters the oil hole of the second pilot valve core 46 through the second balance valve core 49 and the oil hole in the second pilot valve guide sleeve 413, and then enters the second oil port 6 through the oil port in the fourth seal valve seat 49, and the small-flow oil flows out from the second oil port 6. When the load is increased, the second balanced valve core 49 is opened by the pressure difference between the two ends, and a large flow of oil enters the oil hole in the third sealed valve seat 48 through the oil hole in the balanced valve guide sleeve 414 and flows out of the second oil port 6.
The oil ports of the first balance valve 2 are a first oil port 5 and a third oil port 7, when oil flows from the first oil port 5 to the third oil port 7, the first balance valve 2 is equivalent to a one-way valve, and the maximum flow of the oil flowing from the first oil port 5 to the third oil port 7 is 250L/min; when the oil flows from the third port 7 to the first port 5, the pressure of the X port is controlled to change the displacement of the first balanced valve element 27, so as to change the opening of the valve port and control the flow from the third port 7 to the first port 5, and the maximum flow from the third port 7 to the first port 5 is 150L/min.
The oil ports of the second balance valve 4 are a second oil port 6 and a fourth oil port 8, when oil flows from the second oil port 6 to the fourth oil port 8, the second balance valve 4 is equivalent to a one-way valve, and the maximum flow of the oil flowing from the second oil port 6 to the fourth oil port 8 is 400L/min; when the oil flows from the fourth port 8 to the second port 6, the pressure of the port X is controlled to change the displacement of the second balanced valve element 47, so as to change the opening of the valve port and control the flow from the fourth port 8 to the second port 6, and the maximum flow from the fourth port 8 to the second port 6 is 250L/min.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. The balance valve with double flow control is characterized by comprising a balance valve arranged in a main valve body (9) and safety valves matched with the balance valve, wherein the balance valve and the safety valves are respectively provided with 2, namely a first balance valve (2), a second balance valve (4), a first safety valve (1) and a second safety valve (3), the first safety valve (1), the first balance valve (2), the second safety valve (3) and the second balance valve (4) are sequentially arranged in the main valve body (9) from top to bottom and are assembled with the main valve body (9) in a clearance fit manner on the same vertical axis into a whole, the first balance valve (2) and the first safety valve (1) form a smaller flow balance valve component, and the second balance valve (4) and the second safety valve (3) form a larger flow balance valve component; the main valve body (9) is provided with 4 oil ports which are respectively a first oil port (5), a second oil port (6), a third oil port (7) and a fourth oil port (8), the first oil port (5) is an inlet of the small-flow balance valve assembly, the third oil port (7) is an oil outlet of the small-flow balance valve assembly, the second oil port (6) is an oil inlet of the large-flow balance valve assembly, and the fourth oil port (8) is an oil outlet of the large-flow balance valve assembly.
2. The balancing valve with dual flow control according to claim 1, characterized in that the first safety valve (1) comprises a first safety valve adjusting rod (12) and a first safety valve guide sleeve (16); the left end of the first safety valve adjusting rod (12) is abutted against a left end cover (11) of the first safety valve, and the right end of the first safety valve adjusting rod is provided with a first safety valve spring (13); the right end of the first safety valve guide sleeve (16) is abutted against a right end cover (17) of a first safety valve, the left end of the first safety valve guide sleeve is provided with a first safety valve seat (14), the first safety valve seat (14) and the first safety valve guide sleeve (16) are in clearance fit with the main valve body (9) and form an accommodating cavity for arranging a first safety valve core (15), and the left end of the first safety valve core (15) is provided with a second safety valve spring (18); a first safety valve spring cavity is formed between the left end of the first safety valve seat (14) and the right end of the first safety valve left end cover (11), and the first safety valve seat (14) is made of flexible materials;
the second safety valve (3) comprises a second safety valve adjusting rod (32) and a second safety valve guide sleeve (36); the left end of the second safety valve adjusting rod (32) is abutted against a left end cover (31) of the second safety valve, and the right end of the second safety valve adjusting rod is provided with a third safety valve spring (33); the right end of the second safety valve guide sleeve (36) is abutted against a right end cover (37) of a second safety valve, a second safety valve seat (34) is arranged at the left end, the second safety valve seat (34) and the second safety valve guide sleeve (36) are in clearance fit with the main valve body (9) and form an accommodating cavity for arranging a second safety valve core (35), and a fourth safety valve spring (38) is arranged at the left end of the second safety valve core (35); and a second safety valve spring cavity is formed between the left end of the second safety valve seat (34) and the right end of the second safety valve adjusting rod (32), and the second safety valve seat (34) is made of a flexible material.
3. A balance valve with dual flow control according to claim 2, wherein the first balance valve (2) comprises a first control piston sleeve (25) and a first balance valve guide sleeve (214); a first control piston (22) is arranged in a cavity of the first control piston sleeve (25), a first control piston small spring (24) and a first control piston large spring (23) are sequentially sleeved outside the first control piston (22), and the left ends of the first control piston sleeve (25) and the first control piston (22) are abutted against a first control piston end cover (21); the first balance valve guide sleeve (214) and a first sealing valve seat (28) and a first balance valve rear end cover (212) which are arranged at the left end and the right end of the first balance valve guide sleeve form an accommodating cavity, a first balance valve core (27) and a first balance valve sleeve rear cover (211) are arranged in the accommodating cavity, a first pilot valve core (26) is arranged in the first balance valve core (27), the left end of the first pilot valve core (26) is abutted to the right end of a first control piston (22) in the cavity of the first balance valve core (27), a second sealing valve seat (29) and a first pilot valve guide sleeve (213) are sleeved in the middle of the accommodating cavity, a first pilot valve core spring (210) is sleeved at the right end of the accommodating cavity, and the first pilot valve core spring (210) is arranged in the accommodating cavity formed by the first balance valve core (27) and the first balance valve sleeve rear cover (211); the first control piston sleeve (25), the first sealing valve seat (28) and the first balance valve guide sleeve (214) are in clearance fit with the main valve body (9);
the second balancing valve (4) comprises a second control piston sleeve (45) and a second balancing valve guide sleeve (414); a second control piston (42) is arranged in a cavity of the second control piston sleeve (45), a second control piston small spring (44) and a second control piston large spring (43) are sequentially sleeved outside the second control piston (42), and the left ends of the second control piston sleeve (45) and the second control piston (42) are abutted to a second control piston end cover (41); the second balance valve guide sleeve (414) and a third sealing valve seat (48) and a second balance valve rear end cover (412) which are arranged at the left end and the right end of the second balance valve guide sleeve form an accommodating cavity, a second balance valve core (47) and a second balance valve sleeve rear cover (411) are arranged in the accommodating cavity, a second pilot valve core (46) is arranged in the second balance valve core (47), the left end of the second pilot valve core (46) is abutted to the right end of a second control piston (42) in the cavity of the second balance valve core (47), a fourth sealing valve seat (49) and a second pilot valve guide sleeve (413) are sleeved in the middle of the second pilot valve core (46), a second pilot valve core spring (410) is sleeved at the right end of the second pilot valve core spring, and the second pilot valve core spring (410) is arranged in the accommodating cavity formed by the second balance valve core (47) and the second balance; the second control piston sleeve (45), the third sealing valve seat (48) and the second balance valve guide sleeve (414) are in clearance fit with the main valve body (9).
4. The balance valve with double flow control according to claim 3, wherein the first safety valve left end cover (11), the first safety valve seat (14), the first safety valve guide sleeve (16), the first control piston end cover (21), the first control piston sleeve (25), the first sealing valve seat (28), the first balance valve rear end cover (212), the second safety valve left end cover (31), the second safety valve seat (34), the second safety valve guide sleeve (36), the second control piston end cover (41), the second control piston sleeve (45), the third sealing valve seat (48), the second balance valve rear end cover (412) and the contact surface of the body (9) are all provided with O-ring seals (50), and the first safety valve adjusting rod (12) and the first safety valve left end cover (11), the second safety valve adjusting rod (32) and the second safety valve left end cover (31) are all provided with O-ring seals (50), and the first safety valve adjusting rod (12) and the second safety valve left end cover (31) are all provided with, O-shaped sealing rings (50) are arranged on the contact surfaces of the second sealing valve seat (29) and the first balance valve core (27) and the contact surfaces of the fourth sealing valve seat (49) and the second balance valve core (47); check rings (51) are arranged on the contact surfaces of the first safety valve left end cover (11), the first safety valve guide sleeve (16), the second safety valve left end cover (31), the second safety valve guide sleeve (36) and the main valve body (9), and the check rings (51) are arranged on the contact surfaces of the first safety valve adjusting rod (12) and the first safety valve left end cover (11), and the second safety valve adjusting rod (32) and the second safety valve left end cover (31); and T-shaped Tekang GlyLag rings (52) are arranged on the contact surfaces of the first safety valve spool (15) and the first safety valve guide sleeve (16) and the contact surfaces of the second safety valve spool (35) and the second safety valve guide sleeve (36).
5. The balance valve with double flow control according to claim 3, wherein the first safety valve right end cover (17), the first control piston end cover (21), the second safety valve right end cover (37) and the second control piston end cover (41) are fixedly connected with the main valve body (9) through inner hexagon screws (53), and spring washers (54) are sleeved on the inner hexagon screws (53); and a nut (55) is arranged on the outer side of the contact end of the left end of the first safety valve adjusting rod (12) and the left end cover (11) of the first safety valve, and a nut (55) is arranged on the outer side of the contact end of the left end of the second safety valve adjusting rod (32) and the left end cover (31) of the second safety valve.
6. The balance valve with dual flow control according to claim 3, wherein the contact ends of the first control piston (22) and the first control piston end cover (21) and the contact ends of the second control piston (42) and the second control piston end cover (41) are provided with damping screws (56), and the right ends of the damping screws (56) are provided with steel balls (510); all be equipped with adjusting screw (57) in first control piston end cover (21) and the second control piston end cover (41), adjusting screw (57) set up in adjusting screw seat (58), and its terminal contact jaw outside with adjusting screw seat (58) is equipped with nut (55), all be provided with O type sealing washer (50) on adjusting screw (57) and nut (55), nut (55) and the contact surface of first control piston end cover (21) or second control piston end cover (41).
7. The balance valve with dual flow control according to claim 3, wherein the first oil port (5), the second oil port (6), the third oil port (7) and the fourth oil port (8) are tube valves, all fixed on the action surface of the main valve body (9) through hexagon socket head cap screws (53), and all the oil ports are connected with an external pipeline through flanges, and the flanges comprise a transition flange (511) and a split flange (512); the first oil port (5) and the second oil port (6) are arranged on the front acting surface of the main valve body, and the third oil port (7) and the fourth oil port (8) are arranged on the rear acting surface of the main valve body.
8. The balance valve with dual flow control according to claim 7, wherein the main valve body (9) is provided with a first oil passage hole (513), a second oil passage hole (514), and a third oil passage hole (515); the first safety valve spring cavity, the oil hole in the first control piston sleeve (25), the second safety valve spring cavity and the oil hole in the second control piston sleeve (45) are communicated in sequence through a first oil way hole (513); the oil hole in the first safety valve guide sleeve (16) is communicated with the oil hole in the first balance valve guide sleeve (214) through a second oil path hole (514); the oil hole in the second safety valve guide sleeve (36) is communicated with the oil hole in the second balance valve guide sleeve (414) through a third oil path hole (515); the oil hole in the first balance valve guide sleeve (214) is communicated with a third oil port (7), the oil hole in the second balance valve guide sleeve (414) is communicated with a fourth oil port (8), the oil ports in the first seal valve seat (28) and the second seal valve seat (29) are communicated with a first oil port (5), and the oil ports in the third seal valve seat (48) and the fourth seal valve seat (49) are communicated with a second oil port (6).
9. The balance valve with dual flow control according to claim 1 or 3, wherein the main valve body (9) is fixed with the top plate (10) through an inner hexagonal screw (53) and fixed with the side plate through an inner hexagonal plug (59), and the first oil port (5) and the third oil port (7) are fixed with the top plate (10) through the inner hexagonal plug (59).
10. A balancing valve with dual flow control according to claim 1 or 3, characterized in that the first balancing valve (2) and the second balancing valve (4) are both constituted by a balancing valve connected in parallel with a non-return valve and assembled in one on the same transverse axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921328120.9U CN210637304U (en) | 2019-08-16 | 2019-08-16 | Balance valve with double-flow control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921328120.9U CN210637304U (en) | 2019-08-16 | 2019-08-16 | Balance valve with double-flow control |
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| CN210637304U true CN210637304U (en) | 2020-05-29 |
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| CN201921328120.9U Active CN210637304U (en) | 2019-08-16 | 2019-08-16 | Balance valve with double-flow control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878477A (en) * | 2020-08-04 | 2020-11-03 | 朱世钰 | Flow type non-leakage superposition double-balance valve |
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2019
- 2019-08-16 CN CN201921328120.9U patent/CN210637304U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878477A (en) * | 2020-08-04 | 2020-11-03 | 朱世钰 | Flow type non-leakage superposition double-balance valve |
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