CN113137254A - Valve element assembly and bidirectional lock - Google Patents

Valve element assembly and bidirectional lock Download PDF

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Publication number
CN113137254A
CN113137254A CN202110442850.7A CN202110442850A CN113137254A CN 113137254 A CN113137254 A CN 113137254A CN 202110442850 A CN202110442850 A CN 202110442850A CN 113137254 A CN113137254 A CN 113137254A
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China
Prior art keywords
valve
cavity
valve core
chamber
assembly
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Granted
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CN202110442850.7A
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Chinese (zh)
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CN113137254B (en
Inventor
孟令宇
周如林
王伟
郭宗凯
卢海承
王统诚
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Beijing Tiandi Marco Electro Hydraulic Control System Co Ltd
Beijing Meike Tianma Automation Technology Co Ltd
Original Assignee
Beijing Tiandi Marco Electro Hydraulic Control System Co Ltd
Beijing Meike Tianma Automation Technology Co Ltd
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Application filed by Beijing Tiandi Marco Electro Hydraulic Control System Co Ltd, Beijing Meike Tianma Automation Technology Co Ltd filed Critical Beijing Tiandi Marco Electro Hydraulic Control System Co Ltd
Priority to CN202110442850.7A priority Critical patent/CN113137254B/en
Publication of CN113137254A publication Critical patent/CN113137254A/en
Application granted granted Critical
Publication of CN113137254B publication Critical patent/CN113137254B/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512—Arrangement of valves
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/26—Hydraulic or pneumatic control

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Multiple-Way Valves (AREA)

Abstract

The invention relates to the technical field of hydraulic supports, in particular to a valve core assembly and a bidirectional lock. The bidirectional lock comprises a valve body, a first valve core assembly and a second valve core assembly, wherein a first port, a second port, a third port, a fourth port, a first valve cavity and a second valve cavity are arranged on the valve body, the first valve core assembly is installed in the first valve cavity, and the second valve core assembly is installed in the second valve cavity. Three chambers are defined between the first valve core assembly and the valve body, three chambers are defined between the second valve core assembly and the valve body, each of the first valve core assembly and the second valve core assembly comprises a valve sleeve, a valve seat, a valve rod, a first valve core, a second valve core, a first elastic piece and a second elastic piece, the first valve core is provided with a first initial position and a first opening position, and the second valve core is provided with a second initial position and a second opening position. The bidirectional lock disclosed by the embodiment of the invention has the advantages of small impact pressure when the applied hydraulic cylinder is used for releasing pressure, small vibration of the hydraulic cylinder, long service life of the hydraulic cylinder and the like.

Description

Valve element assembly and bidirectional lock
Technical Field
The invention relates to the technical field of hydraulic supports, in particular to a valve core assembly and a bidirectional lock.
Background
The hydraulic support is a structure used for controlling the mine pressure of a coal face, and is an important part in a fully mechanized coal mining system. Currently, the hydraulic support is controlled by an independent bidirectional lock, and the extending and retracting of a piston rod in a hydraulic cylinder are controlled by the bidirectional lock so as to maintain the operation posture of the hydraulic support. The bidirectional latch in the related technology has the problems of complex structure, inconvenient disassembly and assembly, easy leakage at a sealing part, large impact force during unloading of the hydraulic cylinder and the like.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
To this end, embodiments of the present invention provide a valve cartridge assembly;
the embodiment of the invention provides a bidirectional lock with small impact force when a hydraulic cylinder is unloaded.
A valve core assembly according to an embodiment of the invention comprises:
the valve sleeve is used for being connected with the valve cavity of the valve body, and a flow channel is arranged on the valve sleeve;
the valve rod is movably inserted on the valve sleeve along the axial direction of the valve rod,
the valve seat is sleeved on the outer side of the valve rod and connected with the valve sleeve, and a sealing cavity with an opening at one end is defined among the valve sleeve, the valve rod and the valve seat; and
each of the first valve core and the second valve core is arranged in the sealing cavity, the first valve core is movably sleeved on the outer side of the valve rod along the axial direction of the valve rod, and the second valve core is connected with the valve rod;
the valve rod is provided with a first pushing part used for being arranged in the valve cavity and a second pushing part used for being abutted against the first valve core, the first valve core is provided with a first initial position and a first opening position, the second valve core is provided with a second initial position and a second opening position, the opening is disconnected with the flow passage when the first valve core is located at the first initial position and the second valve core is located at the second initial position, and the second pushing part is spaced from the first valve core in the axial direction of the valve rod; the opening is communicated with the flow passage when the first valve core is positioned at a first opening position, and the opening is communicated with the flow passage when the second valve core is positioned at a second opening position.
The bidirectional lock utilizing the valve core assembly provided by the embodiment of the invention has the advantages of small impact pressure, small vibration of the hydraulic cylinder, long service life of the hydraulic cylinder and the like when the applied hydraulic cylinder is used for releasing pressure.
In some embodiments, the valve seat has a first sealing portion, the first valve element has a first mating portion and a second sealing portion, the second valve element has a second mating portion, the first mating portion abuts the first sealing portion when the first valve element is located at a first initial position, the first mating portion leaves the first sealing portion when the first valve element is located at a first open position, the second mating portion abuts the second sealing portion when the second valve element is located at a second initial position, the second mating portion leaves the second sealing portion when the second valve element is located at a second open position, the first valve element is sleeved outside the second valve element, at least one of the first sealing portion and the first mating portion is a tapered surface, and at least one of the second sealing portion and the second mating portion is a tapered surface.
In some embodiments, a cross-sectional area of a fluid passage formed between the first mating portion and the first sealing portion when the first valve element is in the first open position is greater than a cross-sectional area of a fluid passage formed between the second mating portion and the second sealing portion when the second valve element is in the second open position;
the flow passage comprises a first flow passage and a second flow passage, the sectional area of the first flow passage is larger than that of the second flow passage, the first flow passage is communicated with the opening when the first valve core is positioned at a first opening position, and the second flow passage is communicated with the opening when the second valve core is positioned at a second opening position.
In some embodiments, the valve further includes a first elastic member for providing a return elastic force to the first valve spool and the second valve spool, and a second elastic member for providing a return elastic force to the valve stem.
In some embodiments, the first elastic member is a compression spring, a first stop member is disposed in the sealing cavity, the first stop member and the second valve element are disposed at a distance in the axial direction of the valve rod, the first elastic member is sleeved on the outer side of the valve rod, and the first elastic member is press-fitted between the first stop member and the second valve element.
In some embodiments, the second elastic member is a compression spring, a spring cavity is defined between the valve sleeve and the valve rod, the spring cavity and the sealing cavity are arranged in a spaced manner, a second stop member is arranged in the spring cavity, the second stop member and the valve rod are arranged in a spaced manner in the axial direction of the valve rod, and the second elastic member is press-fitted between the second stop member and the valve rod.
In some embodiments, at least a portion of the spring chamber is disposed outside of the valve body, the second stopper is connected to the valve housing, and at least one of the valve housing and the second stopper has a vent hole, through which the spring chamber communicates with the external environment.
In some embodiments, the second stop is coupled to the valve housing, and at least one of the valve housing and the second stop has a vent hole therein, such that the spring chamber is in communication with the external environment through the vent hole.
In some embodiments, the valve rod includes a first section, a second section and a third section, the second section is located between the first section and the third section in the axial direction of the valve rod, each of the first section and the third section is detachably connected to the second section, the first pushing portion and the second pushing portion are arranged on the first section, the first valve core is sleeved outside the second section, the second valve core is connected to the second section, and the third section is in sealing fit with the valve sleeve.
A bidirectional lock according to an embodiment of the present invention includes:
the valve body is provided with a first port, a second port, a third port, a fourth port, a first valve cavity and a second valve cavity; and
the first valve core assembly is installed in the first valve cavity, the second valve core assembly is installed in the second valve cavity, a first cavity, a second cavity and a third cavity are defined between the first valve core assembly and the valve body, a fourth cavity, a fifth cavity and a sixth cavity are defined between the second valve core assembly and the valve body, each of the second cavity and the fourth cavity is communicated with the first port or the second cavity is communicated with the first port, each of the first cavity and the fifth cavity is communicated with the second port or the fifth cavity is communicated with the second port, the third cavity is communicated with the third port, and the sixth cavity is communicated with the fourth port.
Each of the first valve core assembly and the second valve core assembly is the valve core assembly according to the embodiment of the invention, the valve sleeve of the first valve core assembly is connected with the first valve cavity, the valve sleeve of the second valve core assembly is connected with the second valve cavity, the flow passage of the first valve core assembly is communicated with the third cavity, and the flow passage of the second valve core assembly is communicated with the sixth cavity;
the first pushing portion of the valve rod of the first valve core assembly is located in the first cavity, and the first pushing portion of the valve rod of the second valve core assembly is located in the fourth cavity.
The bidirectional lock disclosed by the embodiment of the invention has the advantages of small impact pressure when the applied hydraulic cylinder is used for releasing pressure, small vibration of the hydraulic cylinder, long service life of the hydraulic cylinder and the like.
In some embodiments, each of the first and second valve chambers is an open chamber open at one end, the valve sleeve of the first valve core assembly being removably associated with the first valve chamber, and the valve sleeve of the second valve core assembly being removably associated with the second valve chamber.
Drawings
FIG. 1 is a schematic diagram of a bi-directional lock according to one embodiment of the present invention.
Fig. 2 is a schematic structural view of the valve body of fig. 1.
Fig. 3 is a schematic structural view of the valve core assembly of fig. 1 with the second valve core in the first initial position and the first valve core in the second initial position.
FIG. 4 is an enlarged view at A in FIG. 3;
fig. 5 is a schematic structural view of the valve core assembly of fig. 1 with the second valve core in the second open position and the first valve core in the first initial position.
Fig. 6 is an enlarged view at B in fig. 5.
Fig. 7 is a schematic view of the valve cartridge assembly of fig. 1 with the first valve cartridge in the first open position.
Fig. 8 is an enlarged view at C in fig. 7.
Reference numerals: a bi-directional lock 100;
a valve body 1; a first port 101; a second port 102; a third port 103; a fourth port 104; a first chamber 105; a second chamber 106; a third chamber 107; a fourth chamber 108; a fifth chamber 109; a sixth chamber 110; a first channel 111; a second channel 112; a third channel 113; a fourth channel 114; a fifth passage 115; a first plug 116; a second plug 117; a third plug 118; a fourth plug 119; a fifth plug 120; a sixth plug 121; a first seal ring 122; a second seal ring 123; a third seal ring 124; a fourth seal ring 125; a fifth seal ring 126; a sixth seal ring 127; a first valve chamber 129; a second valve chamber 130;
a valve core assembly 200;
a first valve core assembly 2;
a valve housing 201; a vent 2011; a dust ring 2012; a seventh seal ring 2013; a first gasket 2014; an eighth seal 2015; a second sealing ring 2016; a flow passage 2010; a first runner 2017; a second flow passage 2018;
a valve stem 202; a first section 2021; a first ejector 20211; a second ejector 20212; a second section 2022; a third section 2023; a ninth seal 2024; a tenth seal 2025; a third sealing stop 2026; an eleventh seal ring 2027; a fourth gasket 2028;
a valve seat 203; a twelfth seal ring 2031; the first seal portion 2032;
a first spool 204; a first fitting portion 2041; a second seal portion 2042; a third ejector 2043; a first stop surface 2044;
a second spool 205; the second fitting portion 2051;
a first elastic member 206;
a second elastic member 207;
a first stopper 208;
a second stopper 209;
a spring pad 210;
a sealed cavity 211; an opening 2111; a second stop surface 2112;
a spring cavity 212;
a second spool assembly 3.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A bi-directional lock 100 according to an embodiment of the present invention is described with reference to the accompanying drawings.
As shown in fig. 1 to 8, a two-way lock 100 according to an embodiment of the present invention includes a valve body 1, a first spool assembly 2, and a second spool assembly 3, wherein the valve body 1 is provided with a first port 101, a second port 102, a third port 103, a fourth port 105, a first valve chamber 129, and a second valve chamber 130.
The first spool assembly 2 is mounted in the first valve chamber 129, the second spool assembly 3 is mounted in the second valve chamber 130, the first spool assembly 2 and the valve body 1 define a first chamber 105, a second chamber 106 and a third chamber 107 therebetween, and the second spool assembly 3 and the valve body 1 define a fourth chamber 108, a fifth chamber 109 and a sixth chamber 110 therebetween. Each of the second chamber 106 and the fourth chamber 108 communicates with the first port 101 or the second chamber 106 communicates with the first port 101, each of the first chamber 105 and the fifth chamber 109 communicates with the second port 102 or the fifth chamber 109 communicates with the second port 102, the third chamber 107 communicates with the third port 103, and the sixth chamber 110 communicates with the fourth port 104.
Each of the first and second spool assemblies 2, 3 is a spool assembly 200 of the valve body 1, and the spool assembly 200 according to an embodiment of the invention is described below with reference to the drawings.
The valve cartridge assembly 200 includes a valve housing 201, a valve seat 203, a valve stem 202, a first valve cartridge 204, and a second valve cartridge 205. A flow passage 2010 is formed in the valve housing 201, the valve rod 202 is movably inserted into the valve housing 201 along the axial direction thereof, the valve seat 203 is fitted to the outer side of the valve rod 202, and the valve seat 203 is connected to the valve housing 201. Valve housing 201, valve stem 202 and valve seat 203 define a sealed chamber 211 having an opening 2111 at one end. The first valve core 204 is sleeved outside the valve rod 202, the first valve core 204 is movably arranged in the sealed cavity 211 along the axial direction of the valve rod 202, the second valve core 205 is connected with the valve rod 202, and the second valve core 205 is arranged in the sealed cavity 211.
The valve rod 202 is provided with a first ejector 20211 and a second ejector 20212 for abutting against the first valve element 204. The valve seat 203 has a first initial position and a first open position. The second spool 205 has a second initial position and a second open position. Wherein the opening 2111 is disconnected from the flow passage 2010 and the second ejector 20212 is spaced apart from the first spool 204 in the axial direction of the valve stem 202 when the first spool 204 is in the first initial position and the second spool 205 is in the second initial position. The opening 2111 communicates with the flow passage 2010 when the first spool 204 is in the first open position and the opening 2111 communicates with the flow passage 2010 when the second spool 205 is in the second open position.
Wherein the valve sleeve 201 of the first valve core assembly 2 is connected with the first valve chamber 129, and the valve sleeve 201 of the second valve core assembly 3 is connected with the second valve chamber 130. The opening 2111 of the first spool assembly 2 communicates with the second chamber 106 and the opening 2111 of the second spool assembly 3 communicates with the fifth chamber 109. The flow passage 2010 of the first spool assembly 201 communicates with the third chamber 107 and the flow passage 2010 of the second spool assembly 3 communicates with the sixth chamber 110. The first ejector 20211 of the valve stem 202 of the first valve cartridge assembly 2 is located within the first chamber 105. The first ejector 20211 of the stem 202 of the second spool assembly 3 is located in the fourth chamber 108.
The communication of each of the second and fourth chambers 106, 108 with the first port 101 or the communication of the second chamber 106 with the first port 101 means: during operation of the two-way lock 100, the first port 101 may be switched from communicating with each of the second chamber 106 and the fourth chamber 108 to communicating with only the second chamber 106, and the first port 101 may also be switched from communicating with only the second chamber 106 to communicating with each of the second chamber 106 and the fourth chamber 108.
Each of the first chamber 105 and the fifth chamber 109 in communication with the second port 102 or the fifth chamber 109 in communication with the second port 102 means: during operation of the bi-directional lock 100, the second port 102 may be switched from communicating with each of the first chamber 105 and the fifth chamber 109 to communicating with only the fifth chamber 109, or the second port 102 may be switched from communicating with only the fifth chamber 109 to communicating with each of the first chamber 105 and the fifth chamber 109.
When the bidirectional lock 100 according to the embodiment of the invention is used for controlling a hydraulic support, the first port 101 of the valve body 1 is communicated with a first oil path of the hydraulic support, the second port 102 of the valve body 1 is communicated with a second oil path of the hydraulic support, the first oil path and the second oil path are not communicated with each other, the third port 103 of the valve body 1 is communicated with a rod cavity (a cavity provided with a piston rod) of a hydraulic cylinder, and the fourth port 104 of the valve body 1 is communicated with a rodless cavity (a cavity not provided with a piston rod) of the hydraulic cylinder. The extending and retracting actions of the piston rod of the hydraulic cylinder can be controlled by controlling the actions of the first valve core assembly 2 and the second valve core assembly 3.
Taking the example that the piston rod is changed from the extended state to the retracted state, when the piston rod is in the extended state, the pressure in the rodless chamber of the hydraulic cylinder is greater than the pressure chamber in the rod chamber of the hydraulic cylinder, the first spool 204 of the first spool assembly 2 and the first spool 204 of the second spool assembly 3 are both located at the first initial position, and the second spool 205 of the first spool assembly 2 and the second spool 205 of the spool assembly 3 are both located at the second initial position (as shown in fig. 3 and 4). When changing the piston rod from the extended state to the retracted state, the first port 101 is controlled to switch from communicating with only the second chamber 106 to communicating with each of the second chamber 106 and the fourth chamber 108, while the second port 102 is controlled to switch from communicating with each of the first chamber 105 and the fifth chamber 109 to communicating with only the fifth chamber 109. Thereby, the emulsion entering the fourth chamber 108 from the first port 101 pushes the first pushing portion 20211 of the valve stem 202 of the second spool assembly 3, and the valve stem 202 of the second spool assembly 3 moves away from the opening 2111; at the same time, the emulsion entering the second chamber 106 from the first port 101 pushes against the first spool 204 of the first spool assembly 2, causing the first spool 204 of the first spool assembly 2 to move back toward the opening 2111.
Preferably, the first valve core 204 is provided with a third pushing portion 2043 facing the opening 2111. Thus, the emulsion entering the second chamber 106 from the first port 101 pushes the third pushing portion 2043 of the first valve core 204 of the first valve core assembly 2, so that the first valve core 204 of the first valve core assembly 2 moves back to the opening 2111.
In the process that the valve rod 202 of the first valve core assembly 2 moves away from the opening 2111, firstly, the valve rod 202 of the second valve core assembly 3 drives the second valve core 205 of the second valve core assembly 3 to move away from the opening 2111, so that the second valve core 205 of the second valve core assembly 3 is located at the second opening position and the first valve core 204 of the second valve core assembly 3 is located at the first initial position (as shown in fig. 5 and 6), at this time, the fifth chamber 109 is communicated with the sixth chamber 110 through the opening 2111, the seal chamber 211 and the flow passage 2010 of the second valve core assembly 3, and then the second port 102 is communicated with the fourth port 104, the emulsion in the rodless chamber of the hydraulic cylinder flows into the second oil path through the fourth port 104 and the second port 102, and the pressure in the rodless chamber of the hydraulic cylinder gradually decreases.
Then, during the process that the pressure in the rodless chamber of the hydraulic cylinder gradually decreases, the valve rod 202 of the second spool assembly 3 continues to gradually move away from the opening 2111, so that the second pushing portion 20212 of the second spool assembly 3 abuts against the first spool 204 and pushes the first spool 204 to move away from the opening 2111, so that the first spool 204 of the second spool assembly 3 is located at the first opening position and the second spool 205 of the second spool assembly 3 is located at the second opening position (as shown in fig. 7 and 8), at this time, the fifth chamber 109 is still communicated with the sixth chamber 110 through the opening 2111, the seal chamber 211 and the flow passage 2010 of the second spool assembly 3, the emulsion in the rodless chamber of the hydraulic cylinder continues to flow into the second oil path through the fourth port 104 and the second port 102, and the pressure in the rodless chamber of the hydraulic cylinder continues to decrease to the first setting value, so that the pressure relief of the rodless chamber of the hydraulic cylinder is realized.
During the process that the first valve core 204 of the first valve core assembly 2 moves back to the opening 2111, the first valve core 204 of the first valve core assembly 2 is located at the second opening position, at this time, the second chamber 106 is communicated with the third chamber 107 through the opening 2111, the sealing chamber 211 and the flow passage 2010 of the first valve core assembly 2, so that the first port 101 is communicated with the third port 103, emulsion in the first oil path flows into the rod chamber of the hydraulic cylinder through the first port 101 and the third port 103, the pressure in the rod chamber of the hydraulic cylinder is gradually increased until the second set value is reached, at this time, the piston rod is in a withdrawing state, and the pressure in the rodless chamber of the hydraulic cylinder is smaller than the pressure chamber in the rod chamber of the hydraulic cylinder.
The process of changing the piston rod from the retracted state to the extended state is similar to the process of changing the piston rod from the extended state to the retracted state, and includes: the first port 101 is controlled to switch from communicating with each of the second chamber 106 and the fourth chamber 108 to communicating with only the second chamber 106, while the second port 102 is controlled to switch from communicating with only the fifth chamber 109 to communicating with each of the first chamber 105 and the fifth chamber 109.
Therefore, the emulsion entering the first chamber 105 from the second port 102 pushes the first pushing portion 20211 of the valve rod 202 of the first valve core assembly 2 to move the valve rod 202 of the first valve core assembly 2 away from the opening 2111, and in turn, the second valve core 205 of the first valve core assembly 2 is located at the second opening position and the first valve core 204 of the first valve core assembly 3 is located at the first initial position (as shown in fig. 5 and 6), the first valve core 204 of the first valve core assembly 3 is located at the first opening position and the second valve core 205 of the first valve core assembly 2 is located at the second opening position (as shown in fig. 7 and 8), so that the emulsion in the rod chamber of the hydraulic cylinder flows into the first oil path through the third port 103 and the first oil path 101, and the pressure relief of the rod chamber of the hydraulic cylinder is realized; meanwhile, the emulsion entering the fifth chamber 109 from the second port 102 pushes the third pushing portion 2043 of the first valve core 204 of the second valve core assembly 3, so that the first valve core 204 of the second valve core assembly 3 moves back to the opening 2111, and the emulsion in the second oil path flows into the rodless cavity of the hydraulic cylinder through the second port 102 and the fourth port 104. At the moment, the piston rod is in an extending state, and the pressure intensity in the rodless cavity of the hydraulic cylinder is larger than that in the rod cavity of the hydraulic cylinder.
When the bidirectional lock 100 according to the embodiment of the present invention is used to control pressure relief of a hydraulic cylinder, when a corresponding chamber (a rod chamber or a rodless chamber) of the hydraulic cylinder starts to relieve pressure, the second valve spool 205 is located at the second open position and the first valve spool 204 is located at the first initial position (as shown in fig. 5 and 6), at this time, emulsion in the corresponding chamber of the hydraulic cylinder can only flow through a fluid passage formed between the first valve spool 204 and the second valve spool 205, and the emulsion in the corresponding chamber of the hydraulic cylinder flows out slowly, so that the pressure in the corresponding chamber of the hydraulic cylinder is reduced slowly, and thus, first-stage pressure relief of the corresponding chamber of the hydraulic cylinder is realized. When the pressure of the corresponding chamber of the hydraulic cylinder is reduced to the third set value, the first valve spool 204 is located at the first opening position and the second valve spool 205 is located at the second opening position (as shown in fig. 7 and 8), at this time, the emulsion in the corresponding chamber of the hydraulic cylinder can flow through the fluid passage formed between the first valve spool 204 and the second valve spool 205 and the fluid passage formed between the valve seat 203 and the first valve spool 204, the emulsion in the corresponding chamber of the hydraulic cylinder flows out faster, which is beneficial to make the emulsion in the corresponding chamber of the hydraulic cylinder flow out quickly, and the second-stage pressure relief of the corresponding chamber of the hydraulic cylinder is realized, so that the piston rod is controlled to extend or retract quickly.
Therefore, the bidirectional lock 100 according to the embodiment of the invention can control and realize the staged pressure relief of the corresponding chambers of the hydraulic cylinder, the pressure in the corresponding chambers of the hydraulic cylinder is reduced slowly in the first stage of pressure relief, so that the impact pressure in the pressure relief can be effectively reduced, and the impact pressure in the pressure relief can be also effectively reduced in the second stage of pressure relief due to the small pressure difference between the two chambers (the rod chamber or the rodless chamber) of the hydraulic cylinder. Therefore, the hydraulic cylinder and the equipment connected with the hydraulic cylinder vibrate less when the hydraulic cylinder releases pressure, and the service life of the hydraulic cylinder and the equipment connected with the hydraulic cylinder is prolonged. In addition, during the second-stage pressure relief, emulsion in the corresponding cavity of the hydraulic cylinder flows out quickly, and the piston rod is not influenced to extend or retract quickly.
Therefore, the bidirectional lock 100 according to the embodiment of the present invention has the advantages of small impact pressure when the applied hydraulic cylinder is used for pressure relief, small vibration of the hydraulic cylinder, long service life of the hydraulic cylinder, etc.
Of course, in other embodiments, the valve core assembly 200 according to the embodiment of the present invention may also be used as a valve core of other valve bodies, such as a one-way lock.
The structure of the bi-directional lock 100 according to an embodiment of the present invention will be described in detail below, taking fig. 1-8 as an example. The two-way lock 100 according to the embodiment of the invention comprises a valve body 1, a first valve core assembly 2 and a second valve core assembly 3, wherein the valve body 1 is provided with a first port 101, a second port 102, a third port 103, a fourth port 105, a first valve cavity 129 and a second valve cavity 130.
The first spool assembly 2 is mounted in the first valve chamber 129 and the second spool assembly 3 is mounted in the second valve chamber 130. In some embodiments, each of the first valve chamber 129 and the second valve chamber 130 is an open chamber with one end open, the valve sleeve 202 of the first valve core assembly 2 is removably connected to the first valve chamber 129, and the valve sleeve 202 of the second valve core assembly 3 is removably connected to the second valve chamber 130. Thus, the first valve core assembly 2 can be assembled and disassembled from the open end of the first valve cavity 129, and the second valve core assembly 3 can be assembled and disassembled from the open end of the second valve cavity 130, so that the valve core assembly is convenient to install, replace and maintain.
For example, as shown in fig. 3, the axial direction of the valve housing 201 is consistent with the left-right direction, the right ends of the first valve chamber 129 and the second valve chamber 130 are open, the first valve core assembly 2 can be taken out or put in from the right end of the first valve chamber 129, and the second valve core assembly 3 can be taken out or put in from the right end of the second valve chamber 130. The left-right direction is shown by an arrow E in fig. 3.
The first spool assembly 2 and the valve body 1 define a first chamber 105, a second chamber 106 and a third chamber 107 therebetween, and the second spool assembly 3 and the valve body 1 define a fourth chamber 108, a fifth chamber 109 and a sixth chamber 110 therebetween. Each of the second chamber 106 and the fourth chamber 108 communicates with the first port 101 or the second chamber 106 communicates with the first port 101, each of the first chamber 105 and the fifth chamber 109 communicates with the second port 102 or the fifth chamber 109 communicates with the second port 102, the third chamber 107 communicates with the third port 103, and the sixth chamber 110 communicates with the fourth port 104.
For example, as shown in fig. 1 and 3, each of the first and second spool assemblies 2, 3 has a region K, a region F, and a region P thereon, and when the first spool assembly 2 is installed in the first valve chamber 129, the region K of the first spool assembly 2 and the first valve chamber 129 enclose a first chamber 105, the region F of the first spool assembly 2 and the first valve chamber 129 enclose a second chamber 106, and the region P of the first spool assembly 2 and the first valve chamber 129 enclose a third chamber 107. When the second spool assembly 3 is installed in the second valve cavity 130, the region K of the second spool assembly 3 and the second valve cavity 130 enclose a fourth chamber 108, the region F of the second spool assembly 3 and the second valve cavity 130 enclose a fifth chamber 109, and the region P of the second spool assembly 3 and the second valve cavity 130 enclose a sixth chamber 110.
In some embodiments, as shown in fig. 1 and 2, the valve body 1 is further provided with a first passage 111, a second passage 112, a third passage 113, a fourth passage 114, a fifth passage 115 and a sixth passage. Wherein the first channel 111 communicates with each of the first port 101 and the second chamber 106, the second channel 112 communicates with each of the third port 103 and the third chamber 107, the third channel 113 communicates with each of the second chamber 106 and the fourth chamber 108, the fourth channel 114 communicates with each of the second port 102 and the fifth chamber 109, the fifth channel 115 communicates with each of the fourth port 104 and the sixth chamber 110, and the sixth channel communicates with each of the fifth chamber 109 and the first chamber 105.
Therefore, fewer channels can be arranged in the valve body 1, and the communication between the first port 101, the second port 102, the third port 103, the fourth port 104 and the corresponding chambers is realized, so that the valve body 1 is simple in structure and convenient to design and process.
The valve body 1 further comprises a first plug 116, a second plug 117, a third plug 118, a fourth plug 119, a fifth plug 120, a sixth plug 121, a first seal ring 122, a second seal ring 123, a third seal ring 124, a fourth seal ring 125, a fifth seal ring 126 and a sixth seal ring 127. Wherein, the first plug 116 is plugged at the orifice of the first channel 111, and the first sealing ring 122 is arranged between the first plug 116 and the valve body 1; the second plug 117 is plugged at the orifice of the second channel 112, and the second sealing ring 123 is arranged between the second plug 117 and the valve body 1; the third plug 118 is plugged at the orifice of the third passage 113, and a third seal ring 124 is arranged between the third plug 118 and the valve body 1; a fourth plug 119 blocks the orifice of the fourth passage 114, and a fourth sealing ring 125 is arranged between the fourth plug 119 and the valve body 1; a fifth plug 120 is plugged at the orifice of the fifth passage 115, and a fifth sealing ring 126 is arranged between the fifth plug 120 and the valve body 1; the sixth plug 121 seals the orifice of the sixth channel, and a sixth seal ring 127 is disposed between the sixth plug 121 and the valve body 1.
Each of the first and second spool assemblies 2, 3 includes a valve sleeve 201, a valve seat 203, a valve stem 202, a first spool 204, and a second spool 205. The valve housing 201 of the first valve core assembly 2 is in sealing communication with the first valve chamber 129 and the valve housing 201 of the second valve core assembly 3 is in sealing communication with the second valve chamber 130. The valve rod 202 is inserted in the valve housing 201 in an axially movable manner, the valve seat 203 is fitted to the outside of the valve rod 202, and the valve seat 203 is sealingly connected to the inner peripheral surface of the valve housing 201.
Wherein inwardly refers to a direction adjacent to the central axis of valve housing 201 in a plane perpendicular to the axial direction of valve housing 201, and outwardly refers to a direction away from the central axis of valve housing 201 in a plane perpendicular to the axial direction of valve housing 201. The inward and outward directions are indicated by arrows D in fig. 3.
Valve housing 201, valve stem 202 and valve seat 203 define a sealed chamber 211 having an opening 2111 at one end. The opening 2111 of the first spool assembly 2 communicates with the second chamber 106 and the opening 2111 of the second spool assembly 3 communicates with the fifth chamber 109. A flow passage 2010 is provided in the valve housing 201, the flow passage 2010 of the first valve core assembly 201 is communicated with the third chamber 107, and the flow passage 2010 of the second valve core assembly 3 is communicated with the sixth chamber 110. The first valve core 204 is movably arranged in the sealing cavity 211 along the axial direction of the valve rod 202, the first valve core 204 is sleeved outside the valve rod 202, the second valve core 205 is arranged in the sealing cavity 211, and the second valve core 205 is connected with the valve rod 202.
The valve rod 202 is provided with a first ejector 20211 and a second ejector 20212 for abutting against the first valve element 204. The first ejector 20211 of the valve stem 202 of the first valve cartridge assembly 2 is located within the first chamber 105. The first ejector 20211 of the stem 202 of the second spool assembly 3 is located in the fourth chamber 108. The first valve element 204 is provided with a third pushing portion 2043 facing the opening 2111.
In some embodiments, the valve stem 202 includes a first section 2021, a second section 2022, and a third section 2023, the second section 2022 is located between the first section 2021 and the third section 2023 in the axial direction of the valve stem 202, each of the first section 2021 and the third section 2023 is detachably connected to the second section 2022, the first ejector 20211 and the second ejector 20212 are provided on the first section 2021, the first valve element 204 is fitted around the outside of the second section 2022, the second valve element 205 is connected to the second section 2022, and the third section 2023 is in sealing engagement with the valve housing 201.
For example, as shown in fig. 3, the stem 202 extends in the left-right direction. The first section 2021 is located to the left of the second section 2022, and the third section 2023 of the valve stem 202 is located to the right of the second section 2022. The first ejector 20211 is provided on the left end portion of the first section 2021, and the second ejector 20212 is provided on the right end portion of the first section 2021. The third ejector 2043 is provided on the right end of the first spool 204. In some embodiments, the first section 2021 and the second section 2022 are threaded, and the third section 2023 and the second section 2022 are threaded.
In some embodiments, as shown in fig. 1 and 3, the bi-directional lock 100 further comprises: the seventh sealing ring 2013, the first sealing retainer ring 2014, the eighth sealing ring 2015 and the second sealing retainer ring 2016 are arranged on the outer peripheral surface of the valve sleeve 201, a first sealing ring groove and a second sealing ring groove are formed in the outer peripheral surface of the valve sleeve 201, the seventh sealing ring 2013 and the first sealing retainer ring 2014 are sleeved in the first sealing ring groove, and the outer peripheral surface of the seventh sealing ring 2013 is attached to the inner peripheral surface of a corresponding valve cavity (the first valve cavity 129 or the second valve cavity 130); the eighth sealing ring 2015 and the second sealing retainer 2016 are sleeved in the second sealing ring groove, and the outer peripheral surface of the eighth sealing ring 2015 is attached to the inner peripheral surface of the corresponding valve cavity (the first valve cavity 129 or the second valve cavity 130).
In some embodiments, as shown in fig. 1 and 3, the bi-directional lock 100 further comprises: a ninth gasket 2024, a tenth gasket 2025, a third gasket 2026, an eleventh gasket 2027, a fourth gasket 2028, and a twelfth gasket 2031.
A third sealing ring groove is formed in the first section 2021, a fourth sealing ring groove is formed in the second section 2022, a fifth sealing ring groove is formed in the third section 2023, a ninth sealing ring 2024 is sleeved in the third sealing ring groove, and the outer peripheral surface of the ninth sealing ring 2024 is attached to the inner peripheral surface of the corresponding valve cavity (the first valve cavity 129 or the second valve cavity 130); the tenth sealing ring 2025 and the third sealing retainer ring 2026 are sleeved in the fourth sealing ring groove, and the outer peripheral surface of the tenth sealing ring 2025 is attached to the inner peripheral surface of the corresponding valve cavity (the first valve cavity 129 or the second valve cavity 130); the eleventh sealing ring 2027 and the fourth sealing retainer 2028 are sleeved in the fifth sealing ring groove, and the outer peripheral surface of the eleventh sealing ring 2027 is attached to the inner peripheral surface of the corresponding valve cavity (the first valve cavity 129 or the second valve cavity 130). A sixth sealing ring groove is formed in the valve seat 203, the twelfth sealing ring 2031 is sleeved in the sixth sealing ring groove, and the outer circumferential surface of the twelfth sealing ring 2031 is attached to the inner circumferential surface of the valve housing 201.
The first spool 204 has a first initial position and a first open position, and the second spool 205 has a second initial position and a second open position.
In some embodiments, the valve seat 203 has a first sealing portion 2032, the first valve spool 204 has a first mating portion 2041 and a second sealing portion 2042, and the second valve spool 205 has a second mating portion 2051. When the first valve element 204 is located at the first initial position, the first matching portion 2041 is attached to the first sealing portion 2032, and when the first valve element 204 is located at the first opening position, the first matching portion 2041 is away from the first sealing portion 2032; when the second valve core 205 is located at the second initial position, the second matching portion 2051 is attached to the second sealing portion 2042, and when the second valve core 205 is located at the second opening position, the second matching portion 2051 is away from the second sealing portion 2042. The first spool 204 is sleeved outside the second spool 205.
Therefore, when the valve core assembly (the first valve core assembly 2 or the second valve core assembly 3) is assembled, the second valve core 205 is sleeved at the set position of the outer side of the first valve core 204, so that the first valve core 204 is positioned in the valve sleeve 201, and the assembly of the two-way lock 100 is facilitated. In addition, the first valve core 204 is sleeved on the outer side of the second valve core 205, so that the axial size of the valve core assembly can be effectively shortened, the coaxiality of all parts of the valve core assembly can be conveniently ensured, and the assembly of the bidirectional lock 100 is further facilitated.
In some embodiments, at least one of the first sealing portion 2032 and the first mating portion 2041 is a tapered surface and at least one of the second sealing portion 2042 and the second mating portion 2051 is a tapered surface. Therefore, when the first valve core 204 is located at the first initial position, the first sealing portion 2032 and the first matching portion 2041 are conveniently attached in a sealing manner, and when the second valve core 205 is located at the second initial position, the second sealing portion 2042 and the second matching portion 2051 are conveniently attached in a sealing manner.
Preferably, as shown in fig. 1, 3-8, each of the first sealing portion 2032, the first mating portion 2041, the second sealing portion 2042, and the second mating portion 2051 is a tapered surface.
Preferably, as shown in fig. 4, a portion of the third ejector 2043 is formed by the first mating portion 2041.
Wherein the opening 2111 is disconnected from the flow passage 2010 and the second ejector 20212 and the third ejector 2043 are spaced apart in the axial direction of the valve stem 202 when the first valve element 204 is in the first initial position and the second valve element 205 is in the second initial position. The opening 2111 communicates with the flow passage 2010 when the first spool 204 is in the first open position and the opening 2111 communicates with the flow passage 2010 when the second spool 205 is in the second open position.
In some embodiments, the cross-sectional area of the fluid path formed between the first mating portion 2041 and the first sealing portion 2032 when the first valve spool 204 is in the first open position is greater than the cross-sectional area of the fluid path formed between the second mating portion 2051 and the second sealing portion 2042 when the second valve spool 205 is in the second open position. The flow passage 2010 includes a first flow passage 2017 and a second flow passage 2018, the first flow passage 2017 having a cross-sectional area greater than the cross-sectional area of the second flow passage 2018. The first flow passage 2017 communicates with the opening 2111 when the first spool 204 is in the first open position, and the second flow passage 2018 communicates with the opening 2111 when the second spool 205 is in the second open position.
Thus, during pressure relief of the corresponding chamber (rod or rodless) of the hydraulic cylinder: first, when the second valve element 205 is located at the second open position and the first valve element 204 is located at the first initial position, the emulsion in the corresponding chamber of the hydraulic cylinder can only flow through the second flow passage 2018 with a smaller cross-sectional area from the fluid path formed between the first mating portion 2041 and the first sealing portion 2032, and the emulsion in the corresponding chamber of the hydraulic cylinder can be more conveniently controlled to flow out at a slower flow rate, so that the pressure in the corresponding chamber of the hydraulic cylinder is reduced more slowly when the pressure in the corresponding chamber of the hydraulic cylinder is just released. Then, when the first valve element 204 is located at the first opening position and the second valve element 205 is located at the second opening position (as shown in fig. 7 and 8), the emulsion in the corresponding chamber of the hydraulic cylinder can quickly flow out from the fluid passage formed between the second matching portion 2051 and the second sealing portion 2042 through the first flow channel 2017 and from the fluid passage formed between the first matching portion 2041 and the first sealing portion 2032 through the second flow channel 2018, so that the emulsion in the corresponding chamber can be more conveniently controlled to quickly flow out, and the piston rod can be conveniently controlled to quickly extend or retract.
In some embodiments, the valve further comprises a first elastic member 206 and a second elastic member 207, the first elastic member 206 is used for providing a return elastic force to the first valve core 204 and the second valve core 205, and the second elastic member 207 is used for providing a return elastic force to the valve rod 202.
Therefore, when the rodless chamber or the rod chamber of the hydraulic cylinder is relieved, the second spool 205 of the second spool assembly 3 is reset under the reset elastic force of the first elastic member 206, and the first spool 204 of the second spool assembly 3 is reset under the reset elastic force of the first elastic member 206. The first spool 204 and the second spool 205 are facilitated to perform the reset operation.
Preferably, the first elastic member 206 is a compression spring, a first stop member 208 is disposed in the sealing cavity 211, the first stop member 208 and the second valve core 205 are disposed at intervals in the axial direction of the valve rod 202, the first elastic member 206 is sleeved on the outer side of the valve rod 202, and the first elastic member 206 is press-fitted between the first stop member 208 and the second valve core 205. Thus, the installation of the first elastic member 206 is facilitated, thereby further facilitating the assembly of the bi-directional lock 100.
For example, as shown in fig. 3 and 4, the first stop member 208 is a stop pad, and the valve sleeve 201 and the valve rod 202 are provided with first stop surfaces, and the stop pad is sleeved outside the valve rod 202 and abuts against the first stop surfaces of the valve sleeve 201 and the valve rod 202.
Preferably, as shown in fig. 3 to 6, a first limit surface 2044 is disposed on the first valve element 204, a second limit surface 2112 is disposed in the seal cavity 211, and when the first valve element 204 is at the first open position, the first limit surface 2044 abuts against the second limit surface 2112.
Preferably, when the first spool 204 is in the first initial position and the second spool 205 is in the second initial position, the distance between the first and second stop surfaces 2044 and 2112 is greater than the pressure-sum distance of the first resilient member 206. Thus, the first resilient member 206 is prevented from being excessively compressed and damaged when the first valve spool 204 is in the first open position.
In some embodiments, the second elastic member 207 is a compression spring, a spring cavity 212 is defined between the valve sleeve 201 and the valve rod 202, the spring cavity 212 and the sealing cavity 211 are arranged at a distance, a second stop member 209 is arranged in the spring cavity 212, the second stop member 209 and the valve rod 202 are arranged at a distance in the axial direction of the valve rod 202, and the second elastic member 207 is pressed and assembled between the second stop member 209 and the valve rod 202. Thus, the installation of the second elastic member 207 is facilitated, thereby further facilitating the assembly of the bidirectional lock 100.
For example, as shown in fig. 3, second stopper 209 is a plug, and second stopper 209 is screwed on the right end portion of valve housing 201. The valve rod 202 is provided with a second stop surface, a spring pad 2012 is sleeved on the valve rod 202, the spring pad 2012 abuts against the second stop surface, and the second elastic member 207 is press-fitted between the second stop member 209 and the spring pad 2012.
Preferably, when the first spool 204 is in the first initial position and the second spool 205 is in the second initial position, the distance between the first stop surface 2044 and the second stop surface 2112 is greater than the pressure-sum distance of the second resilient member 207. Therefore, the second elastic member 207 is prevented from being excessively compressed and damaged when the first valve element 204 is in the first open position.
In some embodiments, as shown in fig. 3, at least a portion of the spring cavity 212 is disposed outside the valve body 1, the second stopper 209 is connected to the valve housing 201, a vent 2011 is disposed on at least one of the valve housing 201 and the second stopper 209, and the spring cavity 212 is communicated with the external environment through the vent 2011. Therefore, the spring cavity 212 can be communicated with the external environment, so that the end of the valve rod 202 opposite to the first ejecting part 20211 is in the atmospheric pressure environment, and thus, the first ejecting part 20211 can be pushed to move along the axial direction thereof with a small pressure, and the quick response of the opening and closing actions of the first valve core 204 and the second valve core 205 is ensured.
Preferably, the vent 2011 is sleeved with a dust ring 2012. Therefore, impurities in the external environment, such as dust, are prevented from entering the inside of the valve body 1, and the impurities in the external environment are prevented from polluting the inside of the two-way valve 100 and affecting the working performance of the two-way valve 100.
In summary, the bidirectional lock 100 according to the embodiment of the present invention has the following advantages:
1) the first valve core 204 and the valve seat 203 of the bidirectional lock 100, and the second valve core 205 and the first valve core 204 respectively form two-stage sealing, when the pressure relief of a rod cavity or a rodless cavity of the hydraulic cylinder is controlled, firstly the second valve core 205 is located at a first opening position, and the first-stage pressure relief of the rod cavity or the rodless cavity of the hydraulic cylinder is realized; when the pressure in the rod cavity or the rodless cavity of the hydraulic cylinder is reduced to a certain threshold value, the first valve core 204 is positioned at the second opening position, so that the second-stage pressure relief of the rod cavity or the rodless cavity of the hydraulic cylinder is realized, and the problem of large impact pressure in the pressure relief process of the hydraulic cylinder is solved;
2) the first valve core 204 and the second valve core 205 adopt a nested structure, the outer surface of the first valve core 204 and the valve seat 203, and the inner surface of the first valve core 204 and the outer surface of the second valve core 205 form conical surface sealing, so that the sealing form is simplified, and the sealing is convenient to realize;
3) one side of the valve rod 202 is communicated with the atmosphere, so that the quick response of the opening and closing actions of the first valve core 204 and the second valve core 205 is ensured;
4) the first valve core assembly 2 and the second valve core assembly 3 are arranged in parallel, and the arrangement of the flow channel on the valve body 1 is optimized, so that the number of the screw plugs is reduced, the integral structure of the bidirectional lock 100 is simplified, and the processing and the assembly of the bidirectional lock 100 are facilitated.
5) First case subassembly 2 and second case subassembly 3 follow one side cartridge of valve body 1 on valve body 1, and the installation of first case subassembly 2 and second case subassembly 3 is dismantled simply, is convenient for maintain.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A valve cartridge assembly, comprising:
the valve sleeve is used for being connected with the valve cavity of the valve body, and a flow channel is arranged on the valve sleeve;
the valve rod is movably inserted on the valve sleeve along the axial direction of the valve rod;
the valve seat is sleeved on the outer side of the valve rod and connected with the valve sleeve, and a sealing cavity with an opening at one end is defined among the valve sleeve, the valve rod and the valve seat; and
each of the first valve core and the second valve core is arranged in the sealing cavity, the first valve core is movably sleeved on the outer side of the valve rod along the axial direction of the valve rod, and the second valve core is connected with the valve rod;
the valve rod is provided with a first pushing part used for being arranged in the valve cavity and a second pushing part used for being abutted against the first valve core, the first valve core is provided with a first initial position and a first opening position, the second valve core is provided with a second initial position and a second opening position, the opening is disconnected with the flow passage when the first valve core is located at the first initial position and the second valve core is located at the second initial position, and the second pushing part is spaced from the first valve core in the axial direction of the valve rod; the opening is communicated with the flow passage when the first valve core is positioned at a first opening position, and the opening is communicated with the flow passage when the second valve core is positioned at a second opening position.
2. The valve cartridge assembly of claim 1, wherein the valve seat has a first sealing portion, the first valve spool has a first mating portion and a second sealing portion, the second valve spool has a second mating portion, when the first valve core is positioned at a first initial position, the first matching part is attached to the first sealing part, the first matching part leaves the first sealing part when the first valve core is positioned at a first opening position, the second matching part is jointed with the second sealing part when the second valve core is positioned at a second initial position, the second matching part is separated from the second sealing part when the second valve core is positioned at a second opening position, the first valve core is sleeved on the outer side of the second valve core, at least one of the first sealing part and the first matching part is a conical surface, and at least one of the second sealing part and the second matching part is a conical surface.
3. The valve cartridge assembly of claim 2, wherein a cross-sectional area of a fluid passage formed between the first mating portion and the first sealing portion when the first valve cartridge is in the first open position is greater than a cross-sectional area of a fluid passage formed between the second mating portion and the second sealing portion when the second valve cartridge is in the second open position;
the flow passage comprises a first flow passage and a second flow passage, the sectional area of the first flow passage is larger than that of the second flow passage, the first flow passage is communicated with the opening when the first valve core is positioned at a first opening position, and the second flow passage is communicated with the opening when the second valve core is positioned at a second opening position.
4. The valve core assembly of any one of claims 1-3, further comprising a first resilient member for providing a return spring force to the first and second valve cores and a second resilient member for providing a return spring force to the valve stem.
5. The valve core assembly of claim 4, wherein the first resilient member is a compression spring, a first stop member is disposed in the sealing cavity, the first stop member and the second valve core are spaced apart in the axial direction of the valve rod, the first resilient member is sleeved on the outer side of the valve rod, and the first resilient member is press-fitted between the first stop member and the second valve core.
6. The valve core assembly of claim 4, wherein the second resilient member is a compression spring, a spring chamber is defined between the valve sleeve and the valve stem, the spring chamber and the seal chamber are spaced apart, a second stop member is disposed in the spring chamber, the second stop member and the valve stem are spaced apart in the axial direction of the valve stem, and the second resilient member is press-fitted between the second stop member and the valve stem.
7. The valve cartridge assembly of claim 6, wherein the second stop is associated with the valve sleeve, and a vent is provided in at least one of the valve sleeve and the second stop such that the spring chamber communicates with the environment through the vent.
8. The valve core assembly of any one of claims 1 to 3, wherein the valve stem comprises a first section, a second section and a third section, the second section is located between the first section and the third section in the axial direction of the valve stem, each of the first section and the third section is detachably connected with the second section, the first pushing portion and the second pushing portion are arranged on the first section, the first valve core is sleeved on the outer side of the second section, the second valve core is connected with the second section, and the third section is in sealing fit with the valve sleeve.
9. A bi-directional lock, comprising:
the valve body is provided with a first port, a second port, a third port, a fourth port, a first valve cavity and a second valve cavity; and
the first valve core assembly is installed in the first valve cavity, the second valve core assembly is installed in the second valve cavity, a first cavity, a second cavity and a third cavity are defined between the first valve core assembly and the valve body, a fourth cavity, a fifth cavity and a sixth cavity are defined between the second valve core assembly and the valve body, each of the second cavity and the fourth cavity is communicated with the first port or the second cavity is communicated with the first port, each of the first cavity and the fifth cavity is communicated with the second port or the fifth cavity is communicated with the second port, the third cavity is communicated with the third port, and the sixth cavity is communicated with the fourth port.
Each of the first and second spool assemblies is a spool assembly according to any one of claims 1-8;
the valve sleeve of the first valve core assembly is connected with the first valve cavity, the valve sleeve of the second valve core assembly is connected with the second valve cavity, the flow channel of the first valve core assembly is communicated with the third cavity, the flow channel of the second valve core assembly is communicated with the sixth cavity, the first pushing portion of the valve rod of the first valve core assembly is located in the first cavity, and the first pushing portion of the valve rod of the second valve core assembly is located in the fourth cavity.
10. The bi-directional lock of claim 9, each of the first and second valve chambers being an open chamber open at one end, the valve sleeve of the first valve spool assembly being removably associated with the first valve chamber, and the valve sleeve of the second valve spool assembly being removably associated with the second valve chamber.
CN202110442850.7A 2021-04-23 2021-04-23 Valve core assembly and bidirectional lock Active CN113137254B (en)

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CN112554930A (en) * 2020-11-11 2021-03-26 北京天地玛珂电液控制系统有限公司 Hydraulic system
CN215444096U (en) * 2021-04-23 2022-01-07 北京天玛智控科技股份有限公司 Valve element assembly and bidirectional lock

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CN114151113A (en) * 2021-10-22 2022-03-08 北京天玛智控科技股份有限公司 Linkage speed-regulating oil way for speed-regulating valve and hydraulic support
CN114151113B (en) * 2021-10-22 2023-12-26 北京天玛智控科技股份有限公司 Speed regulating valve and linkage speed regulating oil way for hydraulic support

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