LU505424B1 - The utility model relates to a pilot type hydraulic buffer valve - Google Patents

The utility model relates to a pilot type hydraulic buffer valve Download PDF

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Publication number
LU505424B1
LU505424B1 LU505424A LU505424A LU505424B1 LU 505424 B1 LU505424 B1 LU 505424B1 LU 505424 A LU505424 A LU 505424A LU 505424 A LU505424 A LU 505424A LU 505424 B1 LU505424 B1 LU 505424B1
Authority
LU
Luxembourg
Prior art keywords
valve
main valve
valve body
solenoid valve
pilot
Prior art date
Application number
LU505424A
Other languages
French (fr)
Inventor
Qihui Zhang
Teng Liu
Yi Liu
shiji Yan
Zebo Guo
Meihua Li
Original Assignee
Univ Jiangxi Sci & Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Jiangxi Sci & Technology filed Critical Univ Jiangxi Sci & Technology
Application granted granted Critical
Publication of LU505424B1 publication Critical patent/LU505424B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
    • F16K11/24—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an electromagnetically-operated valve, e.g. for washing machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
    • F15B13/0435—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the pilot valves being sliding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
    • F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0668—Sliding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0686—Braking, pressure equilibration, shock absorbing
    • F16K31/0696—Shock absorbing, e.g. using a dash-pot
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/01—Damping of valve members
    • F16K47/012—Damping of valve members by means of a resilient damping element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention discloses a pilot-type hydraulic buffer valve, which belongs to the technical field of buffer valve. The valve body includes a solenoid valve body and a main valve body. The bottom of the solenoid valve body is fixed with a solenoid valve end cover. The bottom of the solenoid valve end cover is connected with the top sleeve of the pilot valve head, and the pilot valve head is fixed connected with one end of the main valve body through the oil intake port arranged inside the pilot valve head, the other end of the main valve body is securely connected to the main valve end cover through the main valve end cover bolt, and one end of the main valve end cover is provided with adjusting nut 2.

Description

DESCRIPTION LU505424
THE UTILITY MODEL RELATES TO A PILOT TYPE HYDRAULIC BUFFER
VALVE
TECHNICAL FIELD
The invention relates to the technical field of a buffer valve, In particular, it relates to a pilot type hydraulic buffer valve.
BACKGROUND ART
Shifting valves play an important role in various shifting systems by controlling the oil circuit to meet the corresponding output. The clutch 1s also inseparable from the control of the shift valve, and the performance of the shift valve has a great impact on the shift operation. The buffer valve can be used to control the oil pressure well to meet the requirements of shifting.
In order to improve the smoothness of the shift and make the speed transition smoothly during the shift process, it is necessary to use a buffer valve to control the oil pressure characteristics entering the clutch.
When the vehicle shifts, the load of the shift circuit changes abruptly, and the hydraulic circuit of the shift control device determines the rapidity and accuracy of the whole vehicle shift. The performance of the hydraulic buffer valve plays an important role in the normal operation of the hydraulic circuit of the shift control device, which directly affects the accuracy, stability and efficiency of the hydraulic circuit of the shift control device. The simpler the structure, the better, the strong anti-pollution ability, and the output pressure can rise smoothly within a certain period of time.
At present, Hydraulic buffer valves used on vehicles, In the process of shifting, when the oil pressure suddenly increases sharply. The output oil pressure of the hydraulic buffer valve also increases sharply. This causes a sharp increase in friction torque, resulting in a larger torque impact, Can not meet the smooth transition of the vehicle shift, sometimes even lead to the wear or destruction of key components of the vehicle. The existing hydraulic buffer valve still has the following drawbacks:1) The hydraulic buffer valve structure of the existing technical solution is more complex, so the cost is high;2) The hydraulic buffer valve of the prior art LU505424 solution has a single function and cannot control or is difficult to control the opening oil pressure;3) In the prior art scheme, after the structure of the valve is determined, it only
ADAPTS to the designed working conditions. If the working conditions are changed, the valve needs to be changed accordingly, so the adaptability of the valve is poor.
The invention aims at the problem that the output oil pressure of the existing hydraulic buffer valve increases sharply, This paper presents a hydraulic buffer valve for shift control device with simple structure, convenient processing, higher reliability and better adaptability, which can increase the output pressure in a certain period of time. The invention relates to a hydraulic circuit for oil pressure control in a shifting control device of an engineering vehicle, in particular to a pilot type hydraulic buffer valve to ensure that the clutch oil chamber has reasonable oil pressure characteristics in the shifting process.
SUMMARY
The invention aims to provide a pilot type hydraulic buffer valve, which solves the problems of high cost, single function, uncontrollability or difficulty to control the opening oil pressure and poor adaptability of the valve.
To this end, The invention provides a pilot type hydraulic buffer valve, which comprises a solenoid valve body and a main valve body. The bottom of the solenoid valve end cover is connected with the top sleeve of the pilot valve head, the pilot valve head is fixed and connected with one end of the main valve body through the oil intake port arranged in the pilot valve head, the other end of the main valve body is fixed and connected with the main valve end cover through the main valve end cover bolt, the main valve end cover is provided with an adjustment nut two.
Preferably, The solenoid valve body at the top of the inner sleeve is provided with a adjusting nut, the bottom of the adjusting nut is provided with a solenoid valve spring, both sides of the solenoid valve spring are provided with a rear magnetic yoke, both sides of the rear magnetic yoke are fixed with a coil frame, the coil is provided with a card in the bottom of the solenoid valve spring is provided with a solenoid valve spool, the solenoid valve spool is arranged in the sleeve, The bottom of the sleeve is provided with a front magnetic yoke, and the bottom of the front magnetic yoke is connected with the electromagnetic valve end cover. LU505424
Preferably, One end of the throttle hole arranged inside the main valve body is connected with the oil inlet port, the other end of the throttle hole is connected with the end of the main valve spool, the bottom of the main valve spool is provided with an oil outlet, the external surround of the main valve spool is provided with a buffer spring, the bottom of the buffer spring is provided with a return oil port, the top of the main valve spool is connected with a plunger,
The plunger is connected with a movable top column, the bottom of the plunger is provided with an oil return port two, and the plunger is surrounded by a plunger spring.
Preferably, a rubber gasket is arranged around the connection point of the pilot valve head and the main valve body.
Preferably, the main valve body has a rectangular structure.
Preferably, the solenoid valve body is perpendicular to the main valve body.
Preferably, the solenoid valve end cover end area is the same as the solenoid valve body end area, and the main valve end cover end area is not greater than the main valve body end area.
Therefore, the invention adopts a pilot type hydraulic buffer valve of the structure, which has the following beneficial effects: (1) The invention has the advantages of simple structure, no complex mechanical structure, convenient processing, saving input cost, and greatly improving work efficiency. (2) The invention can control the start and stop of the buffer valve, the starting pressure and the buffer characteristics through the electromagnetic valve. (3) The adjusting nut of the invention can drive the movable top column to move, and then adjust the preload force of the plunger spring and the buffer spring, so as to change the oil pressure of the oil inlet of the buffer valve, so that the adaptability of the hydraulic buffer valve is stronger.
The technical scheme of the invention is further described in detail by the attached drawings and embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a structural diagram of a pilot type hydraulic buffer valve of the invention;
Drawing mark
1, adjusting nut 1, 2, solenoid valve spring, 3, rear magnetic yoke, 4, coil frame, 5, solenoid LU505424 valve spool, 6, coil, 7, sleeve, 8, front magnetic yoke, 9, solenoid valve end cover, 10, pilot valve head, 11, oil inlet, 12, throttle hole, 13, rubber gasket, 14, main valve spool, 15, oil outlet, 16, oil return port one, 17, oil return port two, 18, main valve end cover bolt, 19, adjusting nut two,20, main valve end cover, 21, main valve body, 22, movable top column, 23, plunger spring, 24, plunger, 25, buffer spring, 26, solenoid body.
DETAILED DESCRIPTION OF THE EMBODIMENTS
The technical scheme of the invention is further explained by the attached drawings and embodiments.
Unless otherwise defined, the technical or scientific terms used in the invention shall have the usual meaning understood by persons of general skill in the field to which the invention belongs. The words "first", "second", and similar terms used in the present invention do not imply any order, quantity, or importance, but are used only to distinguish different components. Words such as "including" or "containing" mean that the component or object present before the word covers the component or object listed after the word and its equivalent, and does not exclude other components or objects. The term "connection" or "connection" is not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc., are used only to indicate the relative position relationship. When the absolute position of the described object changes, the relative position relationship may also change accordingly.
Embodiment
As 1s shown in Figure 1, the invention provides a pilot hydraulic buffer valve, comprising solenoid valve body 26 and main valve body 21. The solenoid valve body 26 is perpendicular to the main valve body 21. The bottom of the solenoid valve body 26 is fixed with a solenoid valve end cover 9, and the bottom of the solenoid valve end cover 9 is connected with the top sleeve of the pilot valve head 10. Pilot valve head 10 is securely connected to one end of main valve body 21 through oil intake port 11 installed in pilot valve head 10, and the other end of main valve body 21 is securely connected to main valve end 20 through main valve end cover bolt 18. Adjustment nut No. 19 is provided at one end of main valve end cover 20. The end area of the solenoid valve cover 9 is the same as the end area of the solenoid valve body 26, LU505424 and the end area of the main valve cover 20 is not larger than the end area of the main valve body 21. Rubber gasket 13 is arranged around the connection of pilot valve head 10 and main valve body 21.
Solenoid valve body 26 top inner sleeve is provided with adjusting nut 1, adjusting nut 1 is provided with solenoid valve spring 2 at the bottom, solenoid valve spring 2 is provided with a rear magnetic yoke 3 on both sides of the rear magnetic yoke 3 is fixed on both sides of the coil frame 4, coil frame 4 card is provided with coil 6, solenoid valve spring 2 is provided with a solenoid valve core 5 at the bottom, solenoid valve core 5 is arranged in sleeve 7. The bottom of the sleeve 7 is provided with a front magnetic yoke 8, and the bottom of the front magnetic yoke 8 is connected with the electromagnetic valve end cover 9.
The main valve body is rectangular. One end of the throttle hole 12 provided inside the main valve body 21 is connected with the oil intake port 11, the other end of the throttle hole 12 is connected with the end of the main valve spool 14, the bottom of the main valve spool 14 is provided with an oil outlet 15, the external surround of the main valve spool 14 is provided with a buffer spring 25, and the bottom of the buffer spring 25 is provided with an oil return port 16. The top of the main valve spool 14 is connected with a plunger 24, the plunger 24 is connected with a movable top plunger 22, the bottom of the plunger 24 is provided with an oil return port 2 17, and the plunger 24 is externally surrounded by a plunger spring 23.
Working principle: The pilot solenoid valve is normally open, and the oil acts on the inner wall of the pipe outside the solenoid valve core through the oil inlet of the pilot valve head, pushing the valve core to move up, the area of the valve core pipe and the oil outlet of the pilot valve head is reduced, and the pressure of the oil outlet of the pilot valve head is reduced;
After the solenoid valve starts, the spool moves down under the action of the electromagnetic force and the spring spring of the solenoid valve, the spool channel recovers, and the outlet pressure of the pilot valve head is consistent with the inlet pressure.
The left end face of the main valve spool 14 is provided with a throttle hole 12, and the oil enters the inner cavity of the valve spool through the throttle hole. As the pressure gradually increases, the plunger is pushed and the plunger spring 23 is compressed, and the pressure of the output oil port of the valve slowly rises under the action of the three. Adjusting nut II 19 can adjust the preload force of the plunger spring 23 and the buffer spring 25, so that the LU505424 opening pressure of the buffer valve can be adjusted to adapt to different working pressures.
When the invention is working, the oil flows into the oil inlet 11 of the pilot valve head 10, presses the solenoid valve spool 5 upward, the oil outlet pressure of the pilot valve head 10 decreases, and then gives an increasing signal to the solenoid valve, so that the solenoid valve spool 5 slowly moves down under the joint action of the solenoid valve spring 2 elastic force and the gradually increasing electromagnetic force. At this time, the channel in the pilot valve head 10 is fully opened. The pressure of the outlet of the pilot valve head 10 is consistent with that of the inlet;
At the same time, the oil acts on the left end of the valve spool. When the pressure at the oil inlet of the main valve (that is, the oil outlet 15 of the pilot valve head 10) is low, the pressure acting on the left end face of the main valve spool 14 is less than the preload force of the buffer spring 25, the main valve is still closed. When the oil pressure rises, the main valve is still closed. When the pressure at the left end of the main valve spool 14 is greater than the preloading force of buffer spring 25 and the preloading force of plunger spring 23, the main valve spool 14 is opened, and the pressure of the oil outlet 15 of the main valve slowly rises under the action of spring force and oil pressure. When the buffer valve reaches stability, the force of the oil on the left end face of the main valve spool 14 is balanced with the force of the buffer spring 25 and the oil pressure in the valve spool cavity. Main valve outlet pressure is constant.
Adjusting nut 1 adjusts the preloading force of the solenoid valve spring 2. With the electromagnetic force of the controlled solenoid valve body 26, the movement speed of the solenoid valve core 5 is controlled, and the oil pressure entering the main valve body 21 is controlled to form the first buffer.
The oil enters the inner cavity of the spool through the throttle hole, and as the pressure gradually increases, the plunger 24 is pushed and the plunger spring 23 is compressed, and the pressure of the output oil port of the valve slowly rises under the action of the three, forming a second buffer.
By controlling the electromagnetic force of the solenoid valve, the opening time, starting pressure and start-stop time of the oil outlet of the pilot valve head can be adjusted.
Adjusting nut 2 19 can adjust the preload force of the plunger spring 23 and the main valve LU505424 buffer spring 25, so as to change the oil pressure of the oil intake port 11 of the main valve, making the hydraulic buffer valve more adaptable.
Therefore, the invention adopts the pilot type hydraulic buffer valve, has the advantages of simple structure, no complex mechanical structure, convenient processing, saving input cost, greatly improving work efficiency, and can control the start and stop of the buffer valve, starting pressure and buffer characteristics through a solenoid valve. And the adjusting nut can drive the movable top column to move, and then adjust the preload force of the plunger spring and the buffer spring, so as to change the oil pressure of the oil inlet of the buffer valve, making the adaptability of the hydraulic buffer valve stronger.
Finally, it should be noted that the above embodiments are used only to illustrate the technical scheme of the invention and not to restrict it, although the invention is described in detail by reference to the better embodiments, it should be understood by ordinary persons skilled in the art that: The technical scheme of the invention can still be modified or equivalent replacement, and such modification or equivalent replacement cannot make the modified technical scheme depart from the spirit and scope of the technical scheme of the invention.

Claims (7)

  1. CLAIMS LU505424
    1- A pilot type hydraulic buffer valve, which is characterized by: comprising a solenoid valve body and a main valve body, the bottom of the solenoid valve body is fixed with a solenoid valve end cover, the bottom of the solenoid valve end cover is connected with the top sleeve of the pilot valve head, the pilot valve head through the oil inlet arranged in the pilot valve head and the main valve body end of the fixed connection, the other end of the main valve body is fixedly connected with the main valve end cover through the main valve end cover bolt, and one end of the main valve end cover is provided with an adjusting nut two.
    2- According to the claim 1, a pilot type hydraulic buffer valve 1s characterized by: the solenoid valve body at the top of the inner sleeve 1s provided with a adjusting nut, the bottom of the adjusting nut is provided with a solenoid valve spring, both sides of the solenoid valve spring are provided with a rear magnetic yoke, both sides of the rear magnetic yoke are fixed with a coil frame, the coil is provided with a card in the bottom of the solenoid valve spring is provided with a solenoid valve spool, the solenoid valve spool is arranged in the sleeve, the bottom of the sleeve is provided with a front magnetic yoke, and the bottom of the front magnetic yoke is connected with the electromagnetic valve end cover.
    3- According to the claim 1, a pilot type hydraulic buffer valve is characterized by: one end of the throttle hole arranged inside the main valve body is connected with the oil inlet port, the other end of the throttle hole is connected with the end of the main valve spool, the bottom of the main valve spool is provided with an oil outlet, the external surround of the main valve spool is provided with a buffer spring, the bottom of the buffer spring is provided with a return oil port, the top of the main valve spool is connected with a plunger, the plunger is connected with a movable top column, the bottom of the plunger is provided with an oil return port two, and the plunger is surrounded by a plunger spring.
    4- According to the claim 1, a pilot type hydraulic buffer valve is characterized in that a rubber gasket is arranged around the connection of the pilot valve head and the main valve body.
    5- According to the claim 1 of a pilot type hydraulic buffer valve, which is characterized LU505424 by: the main valve body is rectangular structure. 6- According to the claim 1 of a pilot hydraulic buffer valve, which is characterized in that the solenoid valve body and the main valve body are perpendicular to each other. 7- According to the claim 1 of a pilot type hydraulic buffer valve, which is characterized by: the solenoid valve end cover end area and the solenoid valve body end area is the same, the main valve end cover end area is not greater than the main valve body end area.
LU505424A 2023-10-16 2023-11-03 The utility model relates to a pilot type hydraulic buffer valve LU505424B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311336999.2A CN117267416A (en) 2023-10-16 2023-10-16 Pilot-operated type hydraulic buffer valve

Publications (1)

Publication Number Publication Date
LU505424B1 true LU505424B1 (en) 2024-05-03

Family

ID=89212280

Family Applications (1)

Application Number Title Priority Date Filing Date
LU505424A LU505424B1 (en) 2023-10-16 2023-11-03 The utility model relates to a pilot type hydraulic buffer valve

Country Status (2)

Country Link
CN (1) CN117267416A (en)
LU (1) LU505424B1 (en)

Also Published As

Publication number Publication date
CN117267416A (en) 2023-12-22

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Effective date: 20240503