CN212899203U

CN212899203U - Large-flow two-section two-way locking type hydraulic control one-way valve capable of buffering

Info

Publication number: CN212899203U
Application number: CN202021477551.4U
Authority: CN
Inventors: 阮广东; 何彦虎
Original assignee: Huzhou Vocational and Technical College
Current assignee: Huzhou Vocational and Technical College
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-04-06
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a two sections two-way locking formula liquid accuse check valves of large-traffic buffering, which comprises a valve body, the valve body is longitudinal symmetry structure, both ends are equipped with the control duct from a left side to the right side in proper order about the valve body, positive oil inlet pipe says and reverse oil inlet pipeline, reverse oil inlet pipeline communicates from top to bottom, two parts all are equipped with cylindrical valve pocket about the valve body, be valve pocket and lower valve pocket respectively, the valve pocket right-hand member runs through the valve body, all be equipped with the case subassembly in the upper and lower valve pocket, case subassembly and valve body threaded connection, the case subassembly is equipped with the control mouth, positive oil inlet and reverse oil inlet, the control mouth, positive oil inlet and reverse oil inlet respectively with the control duct, positive oil inlet pipe. The utility model connects two small-sized hydraulic control one-way valves in parallel for shunting, reduces the volume of the valve body and the valve core, and improves the opening performance; the two-way locking channel improves the two-way locking effect of the hydraulic control one-way valve, so that the forward conduction and the reverse conduction of the valve core are completed under the action of the control oil.

Description

Large-flow two-section two-way locking type hydraulic control one-way valve capable of buffering

Technical Field

The utility model belongs to the technical field of a check valve technique and specifically relates to a two sections two-way locking formula liquid accuse check valves can be cushioned to large-traffic.

Background

The one-way valve is mainly used for controlling the one-way flow of oil, and the reversing valve is mainly used for realizing the on-off and reversing functions of an oil way. According to the structure and the function of the non-communicating check valve, the check valve mainly comprises two types of common check valves and hydraulic control check valves. The common check valve has the functions of forward conduction and reverse cut-off, the hydraulic control check valve has the functions of the common check valve and can realize reverse conduction under the action of control oil, the two check valves use the cone valve as the valve core to control the on-off of the oil, and the sealing effect is good. However, in high-pressure and high-flow occasions, if a high-flow specification hydraulic control one-way valve is selected or designed, on one hand, the valve is large in size and heavy in structure, and on the other hand, the opening sensitivity of the valve is poor; in addition, under the high-pressure and high-flow occasions, the pressure and flow fluctuation of liquid is large, large vibration noise is generated when the valve is opened and closed, the opening performance is poor, and accordingly the operation of an actuating element is not stable.

For example, in a "double hydraulic control check valve" disclosed in chinese patent literature, the publication No. CN206346977U discloses that two hydraulic control check valves are provided in a valve body, a valve core is installed in a valve housing of the hydraulic control check valve, a plug is provided at a tail of the valve housing, a connecting shaft is provided between the two hydraulic control check valves, a first oil port and a third oil port are respectively provided at an upper portion and a lower portion of one hydraulic control check valve on the valve body, a second oil port and a fourth oil port are respectively provided at an upper portion and a lower portion of the other hydraulic control check valve on the valve body, the first oil port to the third oil port are a hydraulic cylinder oil inlet loop, and the second oil port to the fourth oil port are. The bidirectional locking cannot be realized, the pressure flow fluctuation of liquid is large, great vibration noise can be generated when the valve is opened and closed, the opening performance is poor, and the running of an actuating element is not stable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems of the prior art that the common large-flow hydraulic control one-way valve has large volume, heavy structure and poor opening sensitivity; in addition, under the high-pressure large-flow occasions, the pressure flow fluctuation of liquid is large, great vibration noise can be generated when the valve is opened and closed, the opening performance is poor, and the problem of unstable operation of an executing element is caused.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the large-flow two-section two-way locking type hydraulic control one-way valve capable of buffering comprises a valve body, wherein the valve body is of an up-and-down symmetric structure, a control pipeline, a forward oil inlet pipeline and a reverse oil inlet pipeline are sequentially arranged at the upper end and the lower end of the valve body from left to right, the reverse oil inlet pipeline is communicated with the upper end and the lower end of the valve body, cylindrical valve cavities are arranged at the upper part and the lower part of the valve body respectively and are an upper valve cavity and a lower valve cavity, the right end of each valve cavity penetrates through the valve body, valve core assemblies are arranged in the upper valve cavity and the lower valve cavity respectively and are in threaded connection with the valve body, each valve core assembly is provided with a control port, a.

The hydraulic control one-way valve is internally provided with a double-valve-core parallel structure and an oil way, the oil inlet amount, the oil return amount and the oil amount of a control port are respectively divided into two parts, the volume of oil acting on the valve core is half of the total volume, the oil acting area is reduced, the valve structure is compact, the two valve cores play a role in high-pressure and large-flow oil, the change of the oil pressure flow can be slowed down, the effect of buffering the oil is achieved, the vibration noise can be buffered, the valve core action can be sensitively reflected at high speed, and the comprehensive performance of the valve is improved.

Preferably, the valve core assembly comprises a main valve core, a secondary valve core, a control piston, a valve sleeve, a return spring and an end cover, the valve sleeve comprises a control piston valve sleeve and a valve core external valve sleeve, the main valve core comprises a first polished rod section, a second polished rod section, a third polished rod section and a fourth polished rod section which are arranged along the axial direction and sequentially become smaller in diameter, the control piston is arranged at the left end of the first polished rod section, the control piston valve sleeve is sleeved on the control piston, the valve core external valve sleeve is arranged at the right side of the control piston valve sleeve and is in threaded connection with the control piston valve sleeve, the end cover is arranged at the right end of the valve core external valve sleeve, a forward oil inlet and a reverse oil inlet are arranged on the valve core external valve sleeve, the secondary valve core is sleeved on the second polished rod section, the left side part of the secondary valve core is a circular truncated cone with a through hole, the inner, the outer side wall of the secondary valve core is tightly attached to the inner wall of the valve core outer valve sleeve and blocks the reverse oil inlet, the inner diameter of the secondary valve core is smaller than the diameter of the first polished rod section, unloading gaps are formed between the first polished rod section and the secondary valve core, one side, close to the main valve core, of the end cover is provided with a cavity for the fourth polished rod section to move left and right, a through hole penetrating through the side wall of the cavity is formed in the end cover, and the through hole is communicated with the forward oil inlet.

The valve core is divided into two parts, namely a main valve core and a secondary valve core, when oil enters from the forward oil inlet, one part of the oil enters a cavity at one side of the end cover close to the main valve core through a through hole penetrating through the side wall of the end cover, so that pressure oil exists at both sides of the valve core, the valve core is not moved at the moment, the secondary valve core blocks the reverse oil inlet, and the valve is in a forward locking state at the moment; when the control port is communicated with pressure oil, the control piston pushes the main valve core to move right, and because the secondary valve core is sleeved on the second optical rod section and the inner diameter of the secondary valve core is smaller than that of the first optical rod section, the main valve core pushes the secondary valve core to move right to realize forward conduction, and the oil flows out from the reverse oil inlet, namely the forward conduction state of the hydraulic control one-way valve; the reverse oil inlet is communicated with high-pressure oil, when the valve needs to be opened reversely, large impact and vibration are generated, the high-pressure oil needs to be unloaded, an unloading gap is formed between the secondary valve core and the main valve core, the oil in the high-pressure oil cavity is unloaded to the forward oil inlet from the gap, unloading is realized, the reverse oil inlet is opened along with the continuous movement of the main valve core, a large amount of oil flows out from the forward oil inlet, and therefore the reverse opening of the valve is realized; when the control port is not used for controlling oil, the valve is in a reverse locking state.

Preferably, the control piston is provided with transverse and longitudinal damping holes, and the damping holes are communicated with the control port. When large-flow oil enters the control port, the oil can change smoothly through the buffer of the damping hole, and the impact and vibration of the valve core during action are reduced.

Preferably, the outer side wall of the valve core external valve sleeve is provided with two annular grooves with right trapezoid cross sections, the bottom edges of the trapezoids are respectively communicated with the forward oil inlet pipeline and the reverse oil inlet pipeline, the inclined edges of the trapezoids are respectively communicated with the forward oil inlet and the reverse oil inlet, and the forward oil inlet and the reverse oil inlet are obliquely arranged. The oil impacts in the annular groove to absorb energy, so that the oil smoothly enters the forward or reverse oil inlet, and the forward and reverse oil inlets of the valve sleeve are designed into inclined structures to further improve the buffering effect, thereby buffering the vibration impact caused by the sudden change of the liquid flow speed direction.

Preferably, the control piston valve sleeve is provided with an external thread, the valve core external valve sleeve is provided with an internal thread, and the thread between the control piston valve sleeve and the valve core external valve sleeve is opposite to the thread between the valve sleeve and the valve body in rotation direction. The valve core assembly is ensured not to be loosened between the two valve sleeves when being assembled and disassembled.

Preferably, the valve sleeve further comprises a reset valve sleeve, the reset valve sleeve is sleeved on the third polished rod section, the inner diameter of the reset valve sleeve is smaller than the diameter of the second polished rod section, the reset valve sleeve is a combination of a circular truncated cone and two cylinders with different outer diameters, the outer diameter of the large cylinder in the middle is larger than that of the small cylinder on the right side, the reset spring sleeve is arranged on the small cylinder, and one end of the reset spring sleeve abuts against the right end face of the large cylinder and the other end of the reset spring sleeve abuts against the left end face of the end cover. The main valve core and the secondary valve core can complete reciprocating motion by the cooperation of the reset valve sleeve and the reset spring.

Preferably, the valve core outer valve sleeve is vertically provided with an unloading hole in a penetrating mode, and the unloading hole is communicated with the annular groove. Compare in ordinary liquid accuse check valve need open in the valve body and unload lotus hole, the utility model discloses set up the off-load hole in inside, open an off-load hole on the valve barrel, this pore communicates with each other with forward oil inlet, has reduced the processing in valve body pore and has reduced the leakage simultaneously.

Therefore, the utility model discloses following beneficial effect has: (1) two small-specification hydraulic control one-way valves are connected in parallel for shunting, so that the volumes of the valve body and the valve core are reduced, and the opening performance is improved; (2) the damping hole can be buffered to ensure that the action change of the oil liquid is smooth, and the impact and the vibration of the valve core during the action are reduced; (3) the bidirectional locking channel improves the bidirectional locking effect of the hydraulic control one-way valve, so that the forward conduction and the reverse conduction of the valve core are completed under the action of the control oil; (4) the inclined structures of the forward oil inlet and the reverse oil inlet of the valve sleeve buffer the vibration impact caused by the sudden change of the liquid flow speed direction.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the valve core assembly of the present invention;

fig. 3 is a schematic structural diagram of the valve body of the present invention.

In the figure: 1. the valve comprises a main valve core 2, a secondary valve core 3, a control piston valve sleeve 4, a valve core external valve sleeve 5, an end cover 6, a control piston 7, a control pipeline 8, a forward oil inlet pipeline 9, a reverse oil inlet pipeline 10, a valve body 10-1, a valve cavity 11, a control port 12, a return spring 13, a cavity 14, a return valve sleeve 15, a through hole 16, a damping hole 17, an unloading hole 18, a forward oil inlet 19, a reverse oil inlet 20, an unloading gap 1-1, a first polished rod section 1-2, a second polished rod section 1-3, a third polished rod section 1-4 and a fourth polished rod section.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1, fig. 2 and fig. 3, the utility model discloses a large-traffic two-section two-way locking type pilot operated check valve that can cushion, including valve body 10, the valve body is the longitudinal symmetry structure, and the upper and lower both ends of valve body are equipped with control pipeline 7, forward oil inlet pipeline 8 and reverse oil inlet pipeline 9 from a left side to the right side in proper order, reverse oil inlet pipeline communicates from top to bottom, and the upper and lower two parts of valve body all are equipped with cylindrical valve pocket 10-1, are upper valve chamber and lower valve chamber respectively, and upper and lower valve chamber are parallel to each other and the right-hand member of valve pocket runs through the valve body, all are equipped with the case subassembly in the upper and lower valve chamber, and the case subassembly is connected with the valve body screw thread, and the case subassembly is equipped with control mouth 11, forward oil inlet 18 and reverse oil inlet; the valve core component is sequentially provided with a first cavity, a second cavity, a third cavity and a fourth cavity from left to right, the valve core component comprises a main valve core 1, a secondary valve core 2, a control piston 6, a valve sleeve, a return spring 12 and an end cover 5, the valve sleeve comprises a control piston valve sleeve 3 and a valve core external valve sleeve 4, the main valve core is a multi-section cylinder, the main valve core comprises a first polished rod section 1-1, a second polished rod section 1-2, a third polished rod section 1-3 and a fourth polished rod section 1-4 which are arranged along the axial direction and have successively smaller diameters, the control piston is arranged at the left end of the first polished rod section, the control piston valve sleeve is sleeved on the control piston, the valve core external valve sleeve is arranged at the right side of the control piston valve sleeve and is in threaded connection with the control piston valve sleeve, the end cover is arranged at the right end of the valve core external valve sleeve, the, the second valve core is sleeved on the second polish rod section, the left side part of the second valve core is a round table provided with a through hole, the inner wall of the valve core external valve sleeve is provided with a conical surface, the round table conical surface of the second valve core props against the conical surface of the valve core external valve sleeve to limit the second valve core, so that the second valve core cannot move leftwards, the outer side wall of the second valve core clings to the inner wall of the valve core external valve sleeve and blocks a reverse oil inlet, so that the reverse oil inlet cannot feed or discharge oil, the inner diameter of the second valve core is smaller than the diameter of the first polish rod section, so that the right end face of the first polish rod section can prop against the second valve core to push the second valve core to move rightwards, an unloading gap 20 is arranged between the first polish rod section and the second valve core, the second polish rod section is close to one side of a forward oil inlet pipeline and is a cutting plane, the right end part, a cavity 13 for the fourth polished rod section to move left and right is arranged on one side of the end cover close to the main valve core, a through hole 15 penetrating through the side wall of the cavity is vertically arranged on the end cover, and the through hole is communicated with the forward oil inlet; the control piston is provided with a transverse damping hole 16 and a longitudinal damping hole 16 which are communicated with the control port; the outer side wall of the valve core external valve sleeve is provided with two annular grooves with right-angled trapezoid cross sections, the bottom edges of the trapezoids are respectively communicated with a forward oil inlet pipeline and a reverse oil inlet pipeline, the inclined edges of the trapezoids are respectively communicated with a forward oil inlet and a reverse oil inlet, and the forward oil inlet and the reverse oil inlet are obliquely arranged; the control piston valve is sleeved with external threads, the valve core external valve sleeve is provided with internal threads, the screwing direction of threads between the control piston valve sleeve and the valve core external valve sleeve is opposite to that of threads between the valve sleeve and the valve body, right-handed threads are arranged between the control piston valve sleeve and the valve core external valve sleeve, and left-handed threads are arranged between the valve sleeve and the valve body; the valve sleeve also comprises a reset valve sleeve 14, the reset valve sleeve is sleeved on the third polished rod section, the inner diameter of the reset valve sleeve is smaller than the diameter of the second polished rod section, the reset valve sleeve is a combined body formed by connecting a circular table and two cylinders with different outer diameters end to end, the outer diameter of the large cylinder positioned in the middle is larger than the outer diameter of the small cylinder positioned on the right side, the reset spring is sleeved on the small cylinder, one end of the reset spring props against the right end face of the large cylinder, the other end of the reset spring props against the left end face of the end cover, the right part of the secondary valve core is in a step shape; and an unloading hole 17 vertically penetrates through the valve core external valve sleeve, one end of the unloading hole is communicated with the annular groove, and the other end of the unloading hole is communicated with a cavity on the right side of the control piston, namely a second cavity, and is used as an oil return path of the control oil.

The utility model discloses inside adopts double-valve core parallel structure and oil circuit, will advance oil quantity, return oil volume, control port oil mass and divide into two parts respectively, and the fluid volume that acts on the case is half of the total volume, has reduced fluid action area and has made the valve compact structure, undertakes the effect of high-pressure large-traffic fluid by two case subassemblies, can slow down the change of oil hydraulic pressure flow and thus play the effect of buffering the fluid effect, can make the case action sensitive reflection fast simultaneously, has improved the comprehensive properties of valve; the control piston is provided with transverse and longitudinal damping holes, when large-flow oil enters the control port, the action change of the oil can be gentle through the buffering of the damping holes, and the impact and vibration of the valve core during action are reduced; the valve core is divided into two parts, namely a main valve core and a secondary valve core, a reverse oil inlet is communicated with high-pressure oil, when reverse opening is needed, large impact and vibration are generated, the high-pressure oil needs to be unloaded, an unloading gap is formed between the secondary valve core and the main valve core, when control oil acts, the oil in a high-pressure oil cavity is unloaded to the forward oil inlet from the gap, unloading is realized, and a main oil port is opened after the unloading, so that the stability of the action of the valve core is realized; the common hydraulic control one-way valve controls the left cavity of the piston to feed control oil, and oil liquid in the right cavity flows back to the oil tank through the external leakage port, the structure needs to open a load-unloading pore channel on the valve body, increases the processing procedure and increases the leakage in the valve, the utility model discloses set the unloading hole in the interior, open an unloading hole on the valve sleeve, the pore channel is communicated with the forward oil inlet, reduces the processing of the pore channel of the valve body and reduces the leakage at the same time; the control piston valve sleeve and the valve core external valve sleeve are two-section integral valve sleeves which are connected through threads. The control piston valve sleeve is an external thread, the valve core external valve sleeve is an internal thread, the thread can be designed into a right-handed connecting thread, and the connecting thread between the valve sleeve and the valve body is designed into a left-handed connecting thread, so that the valve core is ensured not to be loosened when being assembled and disassembled; when oil enters from the forward oil inlet, part of the oil enters the cavity at one side of the end cover close to the main valve core through the through hole penetrating through the side wall of the end cover, so that pressure oil exists at both sides of the valve core, the valve core is not moved at the moment, the secondary valve core blocks the reverse oil inlet, and the valve is in a forward locking state at the moment; when the control port is communicated with pressure oil, the control piston pushes the main valve core to move right, and because the secondary valve core is sleeved on the second optical rod section and the inner diameter of the secondary valve core is smaller than that of the first optical rod section, the main valve core pushes the secondary valve core to move right to realize forward conduction, and the oil flows out from the reverse oil inlet, namely the forward conduction state of the hydraulic control one-way valve; the reverse oil inlet is communicated with high-pressure oil, when the valve needs to be opened reversely, large impact and vibration are generated, the high-pressure oil needs to be unloaded, an unloading gap is formed between the secondary valve core and the main valve core, the oil in the high-pressure oil cavity is unloaded to the forward oil inlet from the gap, unloading is realized, the reverse oil inlet is opened along with the continuous movement of the main valve core, a large amount of oil flows out from the forward oil inlet, and therefore the reverse opening of the valve is realized; when the control port is not communicated with the control oil, the valve is in a reverse locking state, and pressure oil needs to be communicated for both forward opening and reverse opening, so that the reliability of the action of the valve core can be ensured; when the oil is externally controlled to unload, the valve core can not make the valve act due to the oil leakage, thereby ensuring the locking tightness.

Claims

1. The high-flow two-section two-way locking type hydraulic control one-way valve capable of buffering comprises a valve body (10) and is characterized in that the valve body is of an up-and-down symmetric structure, a control pipeline (7), a forward oil inlet pipeline (8) and a reverse oil inlet pipeline (9) are sequentially arranged at the upper end and the lower end of the valve body from left to right, the reverse oil inlet pipeline is communicated with the upper end and the lower end of the valve body, a cylindrical valve cavity (10-1) is arranged at the upper part and the lower part of the valve body and is an upper valve cavity and a lower valve cavity respectively, the right end of the valve cavity penetrates through the valve body, a valve core assembly is arranged in the upper valve cavity and the lower valve cavity and is in threaded connection with the valve body, the valve core assembly is provided with a control port (11), a.

2. The high-flow two-section two-way locking type pilot-controlled check valve capable of buffering according to claim 1, wherein the valve core assembly comprises a main valve core (1), a secondary valve core (2), a control piston (6), a valve sleeve, a return spring (12) and an end cover (5), the valve sleeve comprises a control piston valve sleeve (3) and a valve core external valve sleeve (4), the main valve core comprises a first polished rod section (1-1), a second polished rod section (1-2), a third polished rod section (1-3) and a fourth polished rod section (1-4) which are axially arranged and have successively smaller diameters, the control piston is arranged at the left end of the first polished rod section, the control piston valve sleeve is sleeved on the control piston, the valve core external valve sleeve is arranged at the right side of the control piston valve sleeve and is in threaded connection with the control piston valve sleeve, the end cover is arranged at the right end of the valve core external valve sleeve, the valve core external valve sleeve is provided with, the second-stage valve core is sleeved on the second polished rod section, the left side part of the second-stage valve core is a circular truncated cone with a through hole, the inner wall of the valve core external valve sleeve is provided with a conical surface, the conical surface of the circular truncated cone of the second-stage valve core abuts against the conical surface of the valve core external valve sleeve, the outer side wall of the second-stage valve core is tightly attached to the inner wall of the valve core external valve sleeve and blocks a reverse oil inlet, the inner diameter of the second-stage valve core is smaller than the diameter of the first polished rod section, unloading gaps (20) are arranged between the first polished rod section and the second-stage valve core, one side of the end cover, which is close to the main valve.

3. A high flow two-section two-way locking pilot operated check valve capable of buffering according to claim 2, wherein the control piston is provided with a transverse and a longitudinal damping hole (16), and the damping hole is communicated with the control port.

4. The high-flow two-section two-way locking type hydraulic control one-way valve capable of buffering as claimed in claim 2, wherein the outer side wall of the valve sleeve outside the valve core is provided with two annular grooves with right-angled trapezoid cross sections, the bottom side of the trapezoid is respectively communicated with the forward oil inlet pipeline and the reverse oil inlet pipeline, the inclined side of the trapezoid is respectively communicated with the forward oil inlet and the reverse oil inlet, and the forward oil inlet and the reverse oil inlet are both obliquely arranged.

5. The high-flow two-section two-way locking type pilot-controlled check valve capable of buffering as claimed in claim 2, wherein the control piston valve sleeve is provided with external threads, the valve core external valve sleeve is provided with internal threads, and the threads between the control piston valve sleeve and the valve core external valve sleeve are opposite to the threads between the valve sleeve and the valve body in rotation direction.

6. The high-flow two-section two-way locking type pilot-controlled check valve capable of buffering as claimed in claim 2, wherein the valve sleeve further comprises a reset valve sleeve (14), the reset valve sleeve is sleeved on the third polished rod section, the inner diameter of the reset valve sleeve is smaller than the diameter of the second polished rod section, the reset valve sleeve is a combination of a circular truncated cone and two cylinders with different outer diameters, the outer diameter of the large cylinder in the middle is larger than that of the small cylinder on the right side, and the reset spring is sleeved on the small cylinder and one end of the reset spring abuts against the right end face of the large cylinder and the other end of the reset spring abuts against the left end face of the end.

7. The high-flow two-section two-way locking type hydraulic control one-way valve capable of buffering as claimed in claim 4, wherein an unloading hole (17) is vertically arranged on the valve core outer valve sleeve in a penetrating manner, and the unloading hole is communicated with the annular groove.