CN101629588B - Liquid control valve with double control ports - Google Patents

Abstract

The invention belongs to the hydraulic technology, relating to improvement on a liquid control valve. The liquid control valve comprises a shell, a valve core (7) and a spring (6), and is characterized in that a reversing mechanism consisting of a reversing component (11), a sliding cutting sleeve (12) and a reversing spring (13) is arranged in a control cavity (1d); the sliding cutting sleeve (12) is positioned in an inner hole of a first annular lug boss (1a), the reversing spring (13) is positioned in an inner cavity of the sliding cutting sleeve (12), the reversing component (11) is arranged in the control cavity (1d) and an installing hole of the reversing component orthogonal to the control cavity (1d], the end of a right reversing arm of a reversing fork (15) is inserted in a circular cone groove at the centre of a left end surface of the sliding cutting sleeve (12), and the end of a left reversing arm of the reversing fork (15) is inserted in the circular cone groove at the centre of an internal end surface of a left end cover (2); and a second control oil nozzle (17) is coaxially communicated with the installing hole of the reversing component. The invention realizes two-path control of the liquid control valve, satisfies the requirement of an oil path for carrying out two-path control on the liquid control valve, and reduces complexity degree, volume and cost of the system.

Description

A kind of liquid control valve with double control ports

Technical field

The invention belongs to hydraulics, relate to improvement hydraulic control valve.

Background technique

The structural principle of existing hydraulic control valve is referring to Fig. 1, and it is made up of housing, the spool 7 and the spring 6 that are installed in the housing.Housing is formed by having the valve body 1, left end cap 2 and the right end cap 3 that connect left and right sides end face center hole.The left port of left end cap 2 and valve body 1 is by screw or be threaded, and the right output port of right end cap 3 and valve body 1 is by screw or be threaded.The first annular boss 1a, the second annular boss 1b and the 3rd annular boss 1c that are arranged in order are from left to right arranged in valve body 1, above-mentioned three annular boss are divided into 4 parts with the inner chamber of valve body 1, are followed successively by control chamber 1d, the first turnover oil pocket 1e, second turnover oil pocket 1f and the spring chamber 1g from left to right.The first turnover oil nozzle 5 is communicated with the first turnover oil pocket 1e, and the second turnover oil nozzle 4 is communicated with the second turnover oil pocket 1f, and control oil nozzle 9 is communicated with control chamber 1d.Spring 6 is positioned at spring chamber 1g, the left end of spring 6 withstands the right side of spool 7, the right-hand member of spring 6 withstands the interior edge face of right end cap 3, the right section 7b of spool 7 and the center hole Spielpassung of the 3rd annular boss 1c, between the center hole of the right side of spool 7 section 7b and the 3rd annular boss 1c, seal ring is arranged, left end at the stage casing of spool 7 7c has conical surface 7a, the right output port of this conical surface 7a and the second annular boss 1b constitutes conical valve, the left side section 7d of spool 7 and the center hole Spielpassung of the first annular boss 1a have seal ring between the center hole of the left side of the spool 7 section 7d and the first annular boss 1a.Its working principle is: after the high pressure oil in the control oil channel enters control chamber 1d by control oil nozzle 9, promoting spool 7 moves right, opened by the conical valve that the right output port of the conical surface 7a and the second annular boss 1b constitutes, the first turnover oil pocket 1e and second passes in and out oil pocket 1f and is communicated with; After the pressure in the control oil channel disappeared, under the promotion of spring 6, spool 7 was to left movement, closed by the conical valve that the right output port of conical surface 7a and the second annular boss 1b constitutes, and the first turnover oil pocket 1e and second passes in and out oil pocket 1f and is spaced.The shortcoming of this structure is: single control oil nozzle is only arranged, only be applicable to the single channel control to hydraulic control valve, when oil circuit need be carried out two-way control to hydraulic control valve, then need to increase annex quantity, increased complexity, volume and the cost of system greatly.

Summary of the invention

The objective of the invention is: propose a kind of liquid control valve with double control ports that can realize two-way control, hydraulic control valve is carried out the needs of the oil circuit of two-way control, reduce complexity, volume and the cost of system to satisfy the demand.

Technological scheme of the present invention is: a kind of liquid control valve with double control ports, comprise the valve body that connects left and right sides end face center hole by having, the housing that left end cap and right end cap are formed, the left port of left end cap and valve body is by screw or be threaded, the right output port of right end cap and valve body is by screw or be threaded, first annular boss that is arranged in order is from left to right arranged in valve body, second annular boss and the 3rd annular boss, above-mentioned three annular boss are divided into 4 parts with the inner chamber of valve body, be followed successively by control chamber from left to right, the first turnover oil pocket, second turnover oil pocket and the spring chamber, the first turnover oil nozzle is communicated with the first turnover oil pocket, the second turnover oil nozzle is communicated with the second turnover oil pocket, the control oil nozzle is communicated with control chamber, spool and spring are installed in valve body, spring is positioned at spring chamber, and the left end of spring withstands the right side of spool; The right section of spool and the center hole Spielpassung of the 3rd annular boss, between the center hole of the right side of spool section and the 3rd annular boss, seal ring is arranged, left end in the stage casing of spool has the conical surface, the right output port of this conical surface and second annular boss constitutes conical valve, the left side section of spool and the center hole Spielpassung of first annular boss, between the center hole of the left side of the spool section and first annular boss, seal ring is arranged, a circular orientation boss is arranged on the inner cylindrical surface of first annular boss; It is characterized in that, the changement of being made up of commutation assembly, slip cutting ferrule and commutation spring is installed in control chamber; The slip cutting ferrule is the cylinder that left end sealing, right-hand member open wide, the slip cutting ferrule is arranged in the endoporus of first annular boss, the left side of circular orientation boss, and keep glade plane space with the endoporus of first annular boss, the conical grooves that a non-perforation is arranged at the center of slip cutting ferrule left side, 1～6 oil through that connects slip cutting ferrule left side and interior edge face is arranged in the outside of above-mentioned conical grooves, the commutation spring is arranged in the inner chamber of slip cutting ferrule, the left side that the right-hand member of commutation spring withstands the circular orientation boss, the left end of commutation spring withstands the interior edge face of slip cutting ferrule; The commutation assembly is installed in the control chamber in the commutation assembly mounting hole with the control chamber quadrature, commutation assembly mounting hole and control oil nozzle coaxial communication, the commutation assembly is by reversing shaft, commutation fork and fixing pin are formed, reversing shaft is positioned at commutation assembly mounting hole, be slidingly matched with commutation assembly mounting hole, commutation fork mounting hole perpendicular to the perforation of reversing shaft axis is arranged at the axial centre place of reversing shaft cylndrical surface, this commutation fork mounting hole is coaxial with control chamber, there is conical surface chamfering α=45 °～60 ° at the two ends of commutation fork mounting hole, also has a pin shaft hole with commutation fork mounting hole quadrature in the reversing shaft cylndrical surface, fixing pin is installed in the above-mentioned pin shaft hole, the left and right sides communtation arm that the commutation fork is made by elastic material is formed with the center connecting ring that is connected left and right sides communtation arm, the commutation fork is installed in the commutation fork mounting hole of reversing shaft by fixing pin, the connecting ring and the fixing pin of commutation fork keep running clearance, the termination of the right communtation arm of commutation fork is inserted in the conical grooves at center, slip cutting ferrule left side, the conical grooves that a non-perforation is arranged at the center of left end cap interior edge face, the termination of the left communtation arm of commutation fork is inserted in the conical grooves at left end cap interior edge face center; One second control oil nozzle is arranged, its position and the same axisymmetric of control oil nozzle, the second control oil nozzle and commutation assembly mounting hole coaxial communication on the left side of valve body.

Advantage of the present invention is: realized the two-way control to hydraulic control valve, satisfied the needs of needs to the oil circuit of hydraulic control valve implementation two-way control, reduced complexity, volume and the cost of system.

Description of drawings

Fig. 1 is the structure principle chart of existing hydraulic control valve.

Fig. 2 is a structure principle chart of the present invention.

Embodiment

Below the present invention is described in further details.Referring to Fig. 1, a kind of liquid control valve with double control ports, comprise the valve body 1 that connects left and right sides end face center hole by having, the housing that left end cap 2 and right end cap 3 are formed, the left port of left end cap 2 and valve body 1 is by screw or be threaded, the right output port of right end cap 3 and valve body 1 is by screw or be threaded, the first annular boss 1a that is arranged in order is from left to right arranged in valve body 1, the second annular boss 1b and the 3rd annular boss 1c, above-mentioned three annular boss are divided into 4 parts with the inner chamber of valve body 1, be followed successively by control chamber 1d from left to right, the first turnover oil pocket 1e, second turnover oil pocket 1f and the spring chamber 1g, the first turnover oil nozzle 5 is communicated with the first turnover oil pocket 1e, the second turnover oil nozzle 4 is communicated with the second turnover oil pocket 1f, control oil nozzle 9 is communicated with control chamber 1d, spool 7 and spring 6 are installed in valve body 1, spring 6 is positioned at spring chamber 1g, the left end of spring 6 withstands the right side of spool 7, and the right-hand member of spring 6 withstands the interior edge face of right end cap 3; The right section 7b of spool 7 and the center hole Spielpassung of the 3rd annular boss 1c, between the center hole of the right side of spool 7 section 7b and the 3rd annular boss 1c, seal ring is arranged, left end at the stage casing of spool 7 7c has conical surface 7a, the right output port of this conical surface 7a and the second annular boss 1b constitutes conical valve, the left side section 7d of spool 7 and the center hole Spielpassung of the first annular boss 1a, between the center hole of the left side of the spool 7 section 7d and the first annular boss 1a, seal ring is arranged, a circular orientation boss 10 is arranged on the inner cylindrical surface of the first annular boss 1a; It is characterized in that, the changement of being made up of commutation assembly 11, slip cutting ferrule 12 and commutation spring 13 is installed in control chamber 1d; Slip cutting ferrule 12 is left end sealings, the cylinder that right-hand member opens wide, slip cutting ferrule 12 is arranged in the endoporus of the first annular boss 1a, the left side of circular orientation boss 10, and keep glade plane space with the endoporus of the first annular boss 1a, the conical grooves that a non-perforation is arranged at the center of slip cutting ferrule 12 left sides, 1～6 oil through that connects slip cutting ferrule 12 left sides and interior edge face is arranged in the outside of above-mentioned conical grooves, commutation spring 13 is arranged in the inner chamber of slip cutting ferrule 12, the left side that the right-hand member of commutation spring 13 withstands circular orientation boss 10, the left end of commutation spring 13 withstands the interior edge face of slip cutting ferrule 12; Commutation assembly 11 is installed in the control chamber 1d in the commutation assembly mounting hole with control chamber 1d quadrature, commutation assembly mounting hole and control oil nozzle 9 coaxial communication, commutation assembly 11 is by reversing shaft 14, commutation fork 15 and fixing pin 16 are formed, reversing shaft 14 is positioned at commutation assembly mounting hole, be slidingly matched with commutation assembly mounting hole, commutation fork mounting hole perpendicular to the perforation of reversing shaft 14 axis is arranged at the axial centre place of reversing shaft 14 cylndrical surface, this commutation fork mounting hole is coaxial with control chamber 1d, there is conical surface chamfering α=45 °～60 ° at the two ends of commutation fork mounting hole, also has a pin shaft hole with commutation fork mounting hole quadrature in reversing shaft 14 cylndrical surface, fixing pin 16 is installed in the above-mentioned pin shaft hole, the left and right sides communtation arm that commutation fork 15 is made by elastic material is formed with the center connecting ring that is connected left and right sides communtation arm, commutation fork 15 is installed in the commutation fork mounting hole of reversing shaft 14 by fixing pin 16, the connecting ring of commutation fork 15 and fixing pin 16 keep running clearance, the termination of the right communtation arm of commutation fork 15 is inserted in the conical grooves at center, slip cutting ferrule 12 left side, the conical grooves that a non-perforation is arranged at the center of left end cap 2 interior edge faces, the termination of the left communtation arm of commutation fork 15 is inserted in the conical grooves at left end cap 2 interior edge face centers; One second control oil nozzle 17 is arranged, its position and control oil nozzle 9 same axisymmetric, the second control oil nozzle 17 and commutation assembly mounting hole coaxial communication on the left side of valve body 1.

Working principle of the present invention is:

Working state 1: when control oil nozzle 9 and second is controlled oil nozzle 17 any one tunnel input high pressure, another road, the reversing shaft 14 that high pressure oil at first promotes to commutate in the assembly mounting hole moves to no pressure direction, commutation fork 15 makes reversing shaft 14 commutations, high pressure oil enters the inner chamber of slip cutting ferrule 12 by the oil through on the slip cutting ferrule 12, promoting spool 7 moves right, reach the first turnover oil pocket [1e] and second turnover oil pocket [1f] connection, and then the purpose that the first turnover oil nozzle [5] and the second turnover oil nozzle [4] are communicated with.

Working state 2: when control oil nozzle 9 and the second control oil nozzle, 17 while high pressure, then by the commutation assembly in the pressure difference promotion commutation assembly mounting hole, make the higher liquid of pressure wherein enter the inner chamber of slip cutting ferrule 12 by the penetration hole in the slip cutting ferrule 12, promoting spool 7 moves right, reach the first turnover oil pocket [1e] and second turnover oil pocket [1f] connection, and then the purpose that the first turnover oil nozzle [5] and the second turnover oil nozzle [4] are communicated with.

In one embodiment of the present of invention, the conical surface chamfering α at commutation fork mounting hole two ends=50 °.

Claims (1)

1. liquid control valve with double control ports, comprise the valve body [1] that connects left and right sides end face center hole by having, the housing that left end cap [2] and right end cap [3] are formed, the left port of left end cap [2] and valve body [1] is by screw or be threaded, the right output port of right end cap [3] and valve body [1] is by screw or be threaded, first annular boss [1a] that is arranged in order is from left to right arranged in valve body [1], second annular boss [1b] and the 3rd annular boss [1c], above-mentioned three annular boss are divided into 4 parts with the inner chamber of valve body [1], be followed successively by control chamber [1d] from left to right, the first turnover oil pocket [1e], second turnover oil pocket [1f] and the spring chamber [1g], the first turnover oil nozzle [5] is communicated with the first turnover oil pocket [1e], the second turnover oil nozzle [4] is communicated with the second turnover oil pocket [1f], control oil nozzle [9] is communicated with control chamber [1d], spool [7] and spring [6] are installed in valve body [1], spring [6] is positioned at spring chamber [1g], the left end of spring [6] withstands the right side of spool [7], and the right-hand member of spring [6] withstands the interior edge face of right end cap [3]; The right section [7b] of spool [7] and the center hole Spielpassung of the 3rd annular boss [1c], between the center hole of the right side of spool [7] section [7b] and the 3rd annular boss [1c], seal ring is arranged, left end in the stage casing of spool [7] [7c] has the conical surface [7a], this conical surface [7a] constitutes conical valve with the right output port of second annular boss [1b], the left side section [7d] of spool [7] and the center hole Spielpassung of first annular boss [1a], between the center hole of the left side of spool [7] section [7d] and first annular boss [1a], seal ring is arranged, a circular orientation boss [10] is arranged on the inner cylindrical surface of first annular boss [1a]; It is characterized in that, the changement of being made up of commutation assembly [11], slip cutting ferrule [12] and commutation spring [13] is installed in control chamber [1d]; Slip cutting ferrule [12] is the left end sealing, the cylinder that right-hand member opens wide, slip cutting ferrule [12] is arranged in the endoporus of first annular boss [1a], the left side of circular orientation boss [10], and keep glade plane space with the endoporus of first annular boss [1a], the conical grooves that a non-perforation is arranged at the center of slip cutting ferrule [12] left side, 1～6 oil through that connects slip cutting ferrule [12] left side and interior edge face is arranged in the outside of above-mentioned conical grooves, commutation spring [13] is arranged in the inner chamber of slip cutting ferrule [12], the right-hand member of commutation spring [13] withstands the left side of circular orientation boss [10], and the left end of commutation spring [13] withstands the interior edge face of slip cutting ferrule [12]; Commutation assembly [11] is installed in the control chamber [1d] in the commutation assembly mounting hole with control chamber [1d] quadrature, commutation assembly mounting hole and control oil nozzle [9] coaxial communication, commutation assembly [11] is by reversing shaft [14], commutation fork [15] and fixing pin [16] are formed, reversing shaft [14] is positioned at commutation assembly mounting hole, be slidingly matched with commutation assembly mounting hole, commutation fork mounting hole perpendicular to the perforation of reversing shaft [14] axis is arranged at the axial centre place of reversing shaft [14] cylndrical surface, this commutation fork mounting hole is coaxial with control chamber [1d], there is conical surface chamfering α=45 °～60 ° at the two ends of commutation fork mounting hole, also has a pin shaft hole with commutation fork mounting hole quadrature in reversing shaft [14] cylndrical surface, fixing pin [16] is installed in the above-mentioned pin shaft hole, the left and right sides communtation arm that commutation fork [15] is made by elastic material is formed with the center connecting ring that is connected left and right sides communtation arm, commutation fork [15] is installed in the commutation fork mounting hole of reversing shaft [14] by fixing pin [16], the connecting ring of commutation fork [15] and fixing pin [16] keep running clearance, the termination of the right communtation arm of commutation fork [15] is inserted in the conical grooves at slip cutting ferrule [12] center, left side, the conical grooves that a non-perforation is arranged at the center of left end cap [2] interior edge face, the termination of the left communtation arm of commutation fork [15] is inserted in the conical grooves at left end cap [2] interior edge face center; One second control oil nozzle [17] is arranged, its position and the same axisymmetric of control oil nozzle [9], the second control oil nozzle [17] and commutation assembly mounting hole coaxial communication on the left side of valve body [1].

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