CN113153853A - Pipeline control device, valve body and liquid path control system for pile hammer - Google Patents
Pipeline control device, valve body and liquid path control system for pile hammer Download PDFInfo
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- CN113153853A CN113153853A CN202110402710.7A CN202110402710A CN113153853A CN 113153853 A CN113153853 A CN 113153853A CN 202110402710 A CN202110402710 A CN 202110402710A CN 113153853 A CN113153853 A CN 113153853A
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- 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
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
- E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
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- Chemical & Material Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Fluid-Driven Valves (AREA)
Abstract
A pipeline control device comprises a pilot pipeline module with an active directional control valve and a pilot directional control valve and a high-pressure pipeline module with a pilot stop valve. The damage effect of the water hammer phenomenon at the moment of opening and closing the high-pressure oil pipeline on pipeline equipment can be reduced. A valve body comprises a valve body and a valve core, wherein the valve core is connected with the valve body in a sliding mode in the Z direction to form a two-position three-way valve; the valve core comprises a head end guide part and a tail end guide part, the head end guide part and the valve core accommodating cavity form an a cavity communicated with the power port II, the tail end guide part and the valve core accommodating cavity form a c cavity communicated with the F cavity, and the maximum sectional area of the c cavity is smaller than that of the a cavity. The volume of the valve body can be reduced under the condition of realizing the function of the pilot direction control valve. A liquid path control system for a pile hammer comprises an oil tank, a pressure pump, a hydraulic hammer body, a hammer body position detection device, a control module, a valve body and a pilot type stop valve. It can reduce the maintenance degree of difficulty of pile hammer.
Description
Technical Field
The invention relates to the field of pipeline control devices for opening and closing high-pressure pipelines, in particular to a pipeline control device, a valve body and a liquid path control system for a pile hammer.
Background
The striking frequency of the hydraulic pile hammer is 30-70 times/min, the highest working pressure in the hammer lifting process can reach 35MPa, the hammer lifting process needs to be completed within 0.7-0.8 s, and the flow of a hydraulic loop is huge. This requires that the hydraulic system must meet the operating characteristics of high pressure, high flow, fast switching, and therefore the spool must open and close quickly during circuit switching. In order to realize the quick switching of a large-flow hydraulic system, a pilot hydraulic resistance control loop is adopted.
Patent document CN101403217A published in 11/14/2008 describes a hydraulic pile hammer gas-liquid control driving system capable of steplessly adjusting impact energy and frequency, which includes an impact weight, an impact cylinder, an impact point signal collecting valve, a main oil inlet cone valve, a first non-pile and low-pressure stop impact control valve, a low-pressure signal collecting valve, an impact cylinder overload protection valve, a return air suction oil supplementing valve, a main oil return cone valve, a second non-pile and low-pressure stop impact control valve, an oil return accumulator, a high-pressure accumulator, a main control valve, a high-frequency low-impact energy pressure regulating valve, a low-frequency high-impact energy pressure regulating valve, an impact energy impact frequency switching valve, a control oil path accumulator, a non-pile signal collecting valve, and a pile cap, wherein P, O, Pk and T are a main oil path high-pressure oil inlet, a main oil path oil return port, a control oil inlet and a leakage oil return port, respectively, a lower cavity of the impact cylinder is communicated with the main oil inlet cone valve and the main oil return cone valve, the upper cavity of the impact oil cylinder is filled with nitrogen and is communicated with an Ak3 control port of the main control valve; an output K2 port and a K1 port of the main control valve are respectively communicated with a control cavity of the main oil inlet cone valve and a control cavity of the main oil return cone valve, a control port Ak2 of the main control valve is communicated with a port K2, the control port Ak is connected with a control oil inlet Pk, and the control port Ak1 is connected with an impact point signal acquisition valve. In the technical scheme, the oil inlet cone valve is controlled by the main control valve, so that the opening and the cutting of an oil inlet pipeline are realized. Ak1 of the main control valve in the technical scheme is communicated with the P oil way through an impact point signal acquisition valve, and Ak3 is communicated with an impact oil cylinder nitrogen gas cavity, namely, the positions of the main control valve and the impact oil cylinder are used for controlling the opening direction of the oil way of the main control valve.
Disclosure of Invention
The first purpose of the invention is to provide a pipeline control device to meet the operating characteristics of high-pressure large-flow quick switching of a hydraulic system.
A second object of the present invention is to provide a valve body to reduce the volume of the valve body under the condition of realizing the function of pilot direction control.
A third object of the present invention is to provide a hydraulic path control system for a pile driving hammer to meet the operating characteristics of a hydraulic pile driving hammer.
The technical scheme of the invention is as follows:
a pipeline control device comprises a pilot pipeline module and a high-pressure pipeline module; the high-pressure pipeline module comprises a pilot type stop valve, and the pilot type stop valve is provided with a high-pressure inlet B, a high-pressure outlet C and a pilot pressure port X; the pilot pipeline module comprises an active directional control valve and a pilot directional control valve, the active directional control valve is provided with a pressure relief port A, a power port II and a pilot pressure port III, the pilot directional control valve is provided with a power port A, a pressure relief port T, a high pressure port P, a pilot pressure port Y, a cavity and a cavity c, the difference of the stress of the sections of the cavity a and the cavity c is used for driving a valve core of the pilot directional control valve to move in two directions, the cavity a, the high pressure port P and a high pressure inlet B pipeline are communicated, the cavity c is communicated with the pilot pressure port III pipeline, the power port II is communicated with a pilot pressure port Y pipeline, the pressure relief port I is communicated with the pressure relief port T pipeline, and the pilot pressure port X is communicated with the power port A pipeline.
Preferably, the pilot-operated shutoff valve is an actively controlled directional control cartridge valve.
Preferably, the active directional control valve is a two-position three-way electromagnetic valve, and is used for opening a pipeline between the pressure relief port (i) and the power port (ii) and a pipeline between the power port (ii) and the pressure guide port (iii).
Preferably, the pilot-operated directional control valve is a hydraulic control type two-position three-way reversing valve, and is used for opening a pipeline between the power port a and the pressure relief port T and a pipeline between the high-pressure port P and the power port a.
Preferably, the high-pressure pipeline module further comprises a pressure relief valve, and an inlet of the pressure relief valve is communicated with the pilot pressure port X pipeline.
A valve body comprises a first valve body and a first valve core, wherein a power port A, a pressure relief port T and a high pressure port P are arranged on the first valve body, the first valve core is in movable sealing type sliding connection with the first valve body in the Z direction to form a two-position three-way valve, and the two-position three-way valve is sequentially provided with a cavity D communicated with a pipeline of the pressure relief port T, a cavity E communicated with a pipeline of the power port A and a cavity F communicated with a pipeline of the high pressure port P in the Z direction; a switch cavity and a valve core accommodating cavity for arranging the first valve core are arranged in the first valve body, a pressure relief port I, a power port II and a pressure guide port III are arranged on the inner wall of the switch cavity, the pressure relief port I is communicated with the pressure relief port T pipeline through a pressure relief pipeline arranged in the first valve body, and the pressure guide port III is communicated with the high pressure port P pipeline through a pressure guide pipeline arranged in the first valve body; the first valve core comprises a head end guide part and a tail end guide part, the head end guide part is in dynamic sealing connection with the inner wall of the valve core accommodating cavity to form an a cavity communicated with the power port II pipeline, the tail end guide part is in dynamic sealing connection with the inner wall of the valve core accommodating cavity to form a c cavity communicated with the F cavity pipeline, and the maximum cross-sectional area of the hole opening of the c cavity on the Z-direction normal plane is smaller than the maximum cross-sectional area of the hole opening of the a cavity on the Z-direction normal plane.
Preferably, the head end guide part is a guide rod, and the tail end guide part is a guide groove.
Preferably, the automatic control valve further comprises an active directional control valve arranged in the switch containing cavity, an execution part of the active directional control valve is used for pipeline communication between the pressure relief port I and the power port II while a pipeline between the power port II and the pressure guide port III is cut off, and the pipeline communication between the power port II and the pressure guide port III while the pipeline between the pressure relief port I and the power port II is cut off.
Preferably, the stop valve further comprises a pilot type stop valve, the pilot type stop valve is provided with a high-pressure inlet B, a high-pressure outlet C and a pilot pressure port X, the high-pressure port P is communicated with the high-pressure inlet B through a pipeline, and the pilot pressure port X is communicated with the power port A through a pipeline.
A liquid path control system for a pile hammer comprises an oil tank, a pressure pump, a hydraulic hammer body, a hammer body position detection device, a control module, the valve body and a pilot type stop valve, wherein an oil suction port of the pressure pump is arranged in the oil tank, the hydraulic hammer body comprises a hammer body shell and a counterweight hammer, the hammer body shell and the counterweight hammer are in dynamic sealing connection to form a hydraulic cavity, and an oil inlet communicated with a pipeline of the hydraulic cavity is formed in the hammer body shell; the active directional control valve is provided with an execution part control end, the output end of the control module is coupled with the execution part control end of the active directional control valve, the output end of the hammer body position detection device is coupled with the input end of the control module, the pilot type stop valve is provided with a high-pressure inlet B, a high-pressure outlet C and a pilot pressure port X, the high-pressure port P, the high-pressure inlet B and an output port pipeline of the pressure pump are communicated, the pilot pressure port X is communicated with the power port A pipeline, and the high-pressure outlet C is communicated with the oil inlet pipeline.
The invention has the beneficial effects that:
1. the pipe line control device of the present invention includes: the high-pressure secondary control pipeline is formed by the main pipeline of the pilot type stop valve, so that the volume of the pilot type stop valve can be reduced, and the high-pressure large-flow pipeline can be opened and closed quickly.
2. The pilot-operated directional control valve is driven by the two-position three-way electromagnetic valve, the transition time for opening and closing the pilot-operated directional control valve is short, and the closing interval time of the pilot-operated stop valve is shortened and controlled.
3. In the valve body of the invention, a first valve body and a first valve core form a differential pressure bidirectional driving type pilot direction control valve, wherein a cavity a is arranged at one side of a head end guide part of the first valve core, a cavity c is arranged at one side of a tail end guide part of the first valve core, the maximum cross-sectional area of an orifice of the cavity c on a Z-direction normal plane is less than that of an orifice of the cavity a on the Z-direction normal plane, a high-pressure port P is simultaneously communicated with the cavity c and a pressure guide port through a pipeline, the cavity a is communicated with a power port through a pipeline, and a pressure relief port is communicated with a pressure relief port T through a pipeline. When the pressure guide port III and the power port II are communicated, the pressure at the head end side of the first valve core is larger than the pressure at the tail end side of the first valve core, the first valve core is pushed to move towards the tail end side by hydraulic pressure, and a pipeline between the high-pressure port P and the power port A is communicated; when the pressure relief port I is communicated with the power port II, the pressure at the tail end side of the first valve core is larger than the pressure at the head end side of the first valve core, the first valve core is pushed to move towards the head end side by hydraulic pressure, and a pipeline between the pressure relief port T and the power port A is communicated; thereby realizing the differential pressure bidirectional driving pilot direction control. In the valve body, when the pressure guide port III and the power port are communicated, the high-pressure port P is communicated with the cavity a and the cavity c at the same time, and the valve core of the pilot-operated directional control valve can be driven to move by means of the maximum sectional area of the orifice of the cavity c on the Z-direction normal plane being smaller than the maximum sectional area of the orifice of the cavity a on the Z-direction normal plane, so that the function of the pilot-operated directional control valve is realized by using a simple structure, and the occupied space is small. In addition, the pilot control liquid path in the valve body is short, and the pilot control liquid path is also beneficial to shortening the transition time of opening and closing of the pilot type stop valve used for control.
4. In the hydraulic path control system for a pile driving hammer of the present invention, the valve body and the pilot type stop valve can be mounted at a position closest to the hammer case (for example, on the hammer case), so that the distance between the pilot type stop valve and the hydraulic chamber can be shortened, thereby shortening the transition time of supplying and stopping the oil to the hydraulic chamber. In addition, the pilot control liquid path in the valve body is short, so that the transition time for controlling the opening and the closing of the pilot type stop valve is shortened, and the piling efficiency is improved.
Drawings
FIG. 1 is a state diagram of a pipeline control device in use;
fig. 2 is a diagram showing another usage state of the pipe control apparatus.
Fig. 3 is a structural view of a pilot type stop valve.
FIG. 4 is a perspective view of a valve body;
FIG. 5 is a front view of FIG. 4;
FIG. 6 is a cross-sectional view A-A of FIG. 5 after rotation in one use configuration;
FIG. 7 is a cross-sectional view taken along line B-B of FIG. 5 in a use state;
FIG. 8 is a rotated sectional view A-A of FIG. 5 in yet another use configuration;
fig. 9 is a sectional view taken along line B-B in fig. 5 in still another state of use.
Fig. 10 is a cross-sectional view of a first valve spool of the valve body shown in fig. 4.
The reference numbers indicate, 1-high-pressure line module, 10-main valve body, 11-main valve spool, 12-spring seat, 13-spring, 14-cover plate, 15-oil drain valve, 2-pilot line module, 20-outer valve body, 21-middle valve sleeve, 22-large diameter spool, 221-first partition, 222-first connecting groove, 223-second partition, 224-second connecting groove, 225-tail end guide, 226-c chamber F chamber connecting pipe, 23-small diameter spool, 24-head end guide sleeve seat, 25-active directional control valve, 26-seal ring, 27-seal ring, 28-tail end guide socket, 29-tail cover.
Detailed Description
The present invention is described below in terms of embodiments in conjunction with the accompanying drawings to assist those skilled in the art in understanding and implementing the present invention. Unless otherwise indicated, the following embodiments and technical terms therein should not be understood to depart from the background of the technical knowledge in the technical field.
Example 1: a pipeline control device, see fig. 1-2, comprises a pilot pipeline module 2 and a high-pressure pipeline module 1.
The high-pressure pipeline module 1 comprises a pilot-operated stop valve having a high-pressure inlet B, a high-pressure outlet C and a pilot-operated pressure port X. GB/T786.1-2009 fluid drive system and element pictogram and circuit diagram 6.1.9.7 shows an actively controlled directional control cartridge insert having a pilot pressure port X, and 6.1.9.8 shows a further actively controlled insert also having a pilot pressure port X, which can be used as a pilot operated stop valve according to the present invention.
In order to realize the manual control of the pilot-operated stop valve, in this embodiment, the high-pressure pipeline module further includes a pressure release valve, and an inlet of the pressure release valve is communicated with the pilot-operated pressure port X pipeline.
The pilot line module 2 comprises an active directional control valve 25 and a pilot directional control valve.
The active directional control valve 25 has a pressure relief port, a power port, and a pressure guide port, and only a pipeline between the power port and the pressure guide port or a pipeline between the pressure relief port and the power port is required to be communicated when the active directional control valve is used. Based on this requirement, the active directional control valve 25 is typically a two-position, three-way directional control valve. For the purpose of automatic control, a two-position three-way electromagnetic direction control valve, a hydraulic two-position three-way direction control valve and a pneumatic two-position three-way direction control valve are generally selected.
The pilot-operated directional control valve is provided with a power port A, a pressure relief port T, a high pressure port P, a pilot pressure port Y, a cavity and a cavity c, the section stress difference of the cavity a and the cavity c is used for driving a valve core of the pilot-operated directional control valve to move in two directions, and when the pilot-operated directional control valve is used, only a pipeline between the power port A and the pressure relief port T needs to be communicated, or only a pipeline between the power port A and the high pressure port P needs to be communicated. The communication between the power port A and the pressure relief port T or the high pressure port P is switched by applying the pressure of the power port II to the pilot pressure port Y. Based on the requirement, the pilot-operated directional control valve generally selects a hydraulic control type two-position three-way reversing valve and a pneumatic control type two-position three-way reversing valve.
The cavity a, the high-pressure port P and the high-pressure inlet B are communicated through a pipeline, the cavity c is communicated with the pressure guide port III through a pipeline, the power port II is communicated with the pilot pressure port Y through a pipeline, the pressure relief port I is communicated with the pressure relief port T through a pipeline, and the pilot pressure port X is communicated with the power port A through a pipeline.
Example 2: a valve body, see fig. 4-9, for performing part of the functions of the pilot line module 2 in embodiment 1, in particular for performing pilot-type directional control.
A valve body comprises a first valve body and a first valve core, wherein the first valve core is in movable sealing type sliding connection with the first valve body in the Z direction.
The first valve body is provided with a power port A, a pressure relief port T and a high pressure port P, and a switch cavity and a valve core accommodating cavity for arranging a first valve core are arranged in the first valve body.
The pressure relief port is communicated with a pressure relief port T pipeline through a pressure relief pipeline arranged in the first valve body, and the pressure guide port is communicated with a high pressure port P pipeline through a pressure guide pipeline arranged in the first valve body. The switch chamber is used to mount an active directional control valve 25. The active directional control valve 25 is used for communicating only with a pipeline between the power port II and the pressure guide port III or communicating only with a pipeline between the pressure relief port I and the power port II.
The first valve core comprises a head end guide part, a valve core main body and a tail end guide part. The head end guide part is connected with the inner wall of the valve core accommodating cavity in a dynamic sealing mode to form an a cavity communicated with the power port II pipeline, the valve core main body is connected with the inner wall of the valve core accommodating cavity in a dynamic sealing mode to form a two-position three-way valve, the two-position three-way valve is sequentially provided with a D cavity communicated with the pressure relief port T pipeline, an E cavity communicated with the power port A pipeline and an F cavity communicated with the high-pressure port P pipeline in the Z direction, and the tail end guide part is connected with the inner wall of the valve core accommodating cavity in a dynamic sealing mode to form a c cavity communicated with the F cavity pipeline.
Wherein the maximum cross-sectional area of the hole of the cavity c in the Z-direction normal plane is less than the maximum cross-sectional area of the hole of the cavity a in the Z-direction normal plane.
Fig. 3 shows a pilot-operated stop valve which is fitted with the valve body of the present embodiment, and which has a high-pressure inlet B, a high-pressure outlet C, and a pilot pressure port X which is also piped to a relief valve 15. When in use, referring to fig. 1-2, the pilot pressure port X is communicated with the power port a, the output port of the high-pressure oil pipe is communicated with the high-pressure port P and the high-pressure inlet B, and the closing or opening control of the pipeline between the high-pressure inlet B and the high-pressure outlet C is realized by controlling the opening direction of the active directional control valve 25.
Specifically, note: pCIs c chamber pressure, FCFor the c-chamber pressure to act on the thrust of the first spool moving to the a-chamber side in the Z-direction, PaIs chamber pressure, FaThe thrust acting on the first spool in the Z-direction toward the c-chamber side for the a-chamber pressure.
When opening the pipeline between the high-pressure inlet B and the high-pressure outlet C, referring to fig. 1, the active directional control valve 25 is operated to communicate the pipeline between the pressure relief port I and the power port II, referring to fig. 6-7, the oil in the cavity a is discharged from the pressure relief port T through the power port II, the pressure relief port I and the pressure relief pipeline in sequence, because in the process, PCAnd PaPressure difference of (F) is enlargedC＞FaAnd in the stage, part of high-pressure oil entering from the high-pressure port P pushes the first valve core to move towards the cavity a, and finally, the head end side of the first valve core is connected with the first valve body. At this time, the relative positions of the first valve body and the first valve spool may refer to fig. 8 to 9. At FC＞FaDuring the phase, and after the second partition plate 223 partitions the F chamber and the E chamber, the control oil in the pilot type stop valve is discharged from the pressure relief port T through the pilot pressure port X, the power port A, E chamber, the second communicating groove 224, and the D chamber, the pilot type stop valve operates, and the pipe between the high pressure inlet B and the high pressure outlet C is opened.After the pipeline between the high-pressure inlet B and the high-pressure outlet C is opened, the active directional control valve 25 needs to be controlled to maintain the state of the pipeline between the pressure relief port (i) and the power port (ii).
When the pipeline between the high-pressure inlet B and the high-pressure outlet C is to be cut off, referring to fig. 2, the active directional control valve 25 is operated to communicate the pipeline between the pressure guide port III and the power port III, referring to fig. 8-9, part of high-pressure oil entering from the high-pressure port P is filled into the cavity a through the pressure guide pipeline, the pressure guide port III and the power port III, meanwhile, the other part of high-pressure oil entering from the high-pressure port P is filled into the cavity C through the cavity C F communicating pipe 226, because the maximum cross-sectional area of the hole of the cavity C on the Z-direction normal plane is less than the maximum cross-sectional area of the hole of the cavity a on the Z-direction normal plane, and the maximum cross-sectional area of the hole of the cavity C on the F-direction normal plane is less than that of the hole of the cavity A on the Z-direction normal planea＞FCAnd in the stage, the high-pressure oil filled into the cavity a pushes the first valve core to move towards the cavity c, and finally the tail end side of the first valve core is connected with the first valve body. At this time, the relative positions of the first valve body and the first valve spool may refer to fig. 6 to 7. In the process, the pressure part of the first valve core pushed by the high-pressure oil in the cavity a to move towards the cavity c is offset by the pressure of the first valve core pushed by the high-pressure oil in the cavity c to move towards the cavity a, and the first valve core is driven to move by the pressure difference between the cavity a and the cavity c. At Fa＞FCIn the stage, after the chamber D and the chamber E are separated by the second partition plate 223, another part of high-pressure oil entering from the high-pressure port P flows into the pilot pressure port X through the chamber F, the first connecting groove 222, the chamber E and the power port a, the pilot type stop valve acts, and the pipeline between the high-pressure inlet B and the high-pressure outlet C is stopped. After the pipeline between the high-pressure inlet B and the high-pressure outlet C is cut off, the active directional control valve 25 needs to be controlled to maintain the state of the pipeline between the pressure guide port III and the power port III.
Referring to fig. 4-9, the first valve body is composed of an outer valve body 20, a middle valve sleeve 21, a head end guide portion sleeve seat 24, a tail end guide portion socket 28 and a tail cover 29, and the middle valve sleeve 21, the head end guide portion sleeve seat 24 and the tail end guide portion socket 28 are all in dynamic sealing connection with the first valve core, so that the requirement on the material specification is higher than that of the outer valve body 20 and the tail cover 29. Referring to fig. 4-9, the outer valve body 20 is provided with a power port a, a pressure relief port T, and a high pressure port P. The outer valve body 20 is provided with a switch mounting groove and a spool mounting groove for mounting a first spool. The inner wall of the switch mounting groove is provided with a pressure relief port I, a power port II and a pressure guide port III. For installing the active directional control valve, the switch installation groove and the switch cavity are the same characteristics. After the tail cover 29 closes the notch of the valve core mounting groove, a valve core accommodating cavity can be formed. The outer valve body 20 is also provided with a pressure guide pipeline for communicating the high pressure port P and the pressure guide port III and a pressure relief pipeline for communicating the pressure relief port T and the pressure relief port I. The middle valve sleeve 21 is provided with a first annular groove for forming a part D chamber, a second annular groove for forming a part E chamber, and a third annular groove for forming a part F chamber, which correspond to the Z direction. The middle valve sleeve 21 is provided with a first radial communication hole for forming a part D cavity, a second radial communication hole for forming a part E cavity and a third radial communication hole for forming a part F cavity in the direction corresponding to the Z direction. The head end guide sleeve seat 24 is internally provided with a head end guide groove, and the groove bottom of the head end guide groove is communicated with a pipeline of the power port II. The tail guide socket 28 is fixedly connected to the tail cover 29, and a guide center line of the tail guide socket 28 and a guide center line of the head guide groove are arranged in a collinear manner.
Referring to fig. 4-10, the first spool is composed of a large diameter spool 22 and a small diameter spool 23. The side surface of the large-diameter valve core 22 is sequentially provided with a first communicating groove 222 for communicating the cavity E and the cavity F and a second communicating groove 224 for communicating the cavity E and the cavity D from the head end to the tail end of the first valve core, and a second partition 223 is formed between the first communicating groove 222 and the second communicating groove 224. The second partition lobe 223 serves to partition the D chamber and the E chamber when the first communicating groove 222 communicates the E chamber and the F chamber, and to partition the F chamber and the E chamber when the first communicating groove 222 communicates the E chamber and the D chamber. The tail end of the large-diameter valve core 22 is provided with a tail end guide part 225, the tail end guide part 225 is an open slot, and the inner wall of the tail end guide part 225 is in dynamic sealing connection with the tail end guide part socket 28 to form a c cavity. A c-chamber F-chamber communication pipe 226 for communicating the c-chamber and the F-chamber is further provided in the first communication groove 222. The small-diameter valve core is connected with the inner wall of the head end guide groove in a dynamic sealing mode to form a cavity a. The maximum cross-sectional area of the hole of the cavity c in the Z-direction normal plane is less than the maximum cross-sectional area of the hole of the cavity a in the Z-direction normal plane. Because the cavity a and the cavity c are respectively arranged at two ends of the first valve core, the large-diameter valve core 22 and the small-diameter valve core 23 can realize corresponding functions without being fixedly connected.
Referring to fig. 4-9, according to the maintenance requirement, a maintenance opening or a processing hole may be formed at a suitable position of any pipeline, and a sealing plug is used to plug the maintenance opening and the processing hole.
Example 3: a valve body, see fig. 4 to 9, for realizing the fluid path control device in embodiment 1, to which an active directional control valve 25 and a pilot type cut-off valve are added to the valve body in embodiment 2.
Active directional control valve 25 is installed in the switch mounting groove, and the execution portion of active directional control valve 25 is connected with switch mounting groove sealing. The executing part of the active directional control valve is used for pipeline communication between the pressure relief port I and the power port II while cutting off the pipeline between the power port II and the pressure guide port III, and pipeline communication between the power port II and the pressure guide port III while cutting off the pipeline between the pressure relief port I and the power port II.
The pilot type stop valve is provided with a high-pressure inlet B, a high-pressure outlet C and a pilot pressure port X, the high-pressure port P is communicated with the high-pressure inlet B through a pipeline, and the pilot pressure port X is communicated with the power port A through a pipeline.
Example 4: a liquid path control system for a pile driving hammer comprises an oil tank, a pressurizing pump, a hydraulic hammer body, a hammer body position detection device, a control module and the valve body of embodiment 3.
The oil suction port of the booster pump is arranged in the oil tank, and when the booster pump is used, the oil suction port of the booster pump needs to be completely immersed in oil liquid in the oil tank.
The hydraulic hammer body comprises a hammer body shell and a counterweight hammer, the hammer body shell and the counterweight hammer are connected in a dynamic sealing mode to form a hydraulic cavity, and an oil inlet communicated with a hydraulic cavity pipeline is formed in the hammer body shell.
Wherein, control module can select industrial computer, singlechip or equivalent circuit, and hammer position detection device can select proximity switch, travel switch.
The active directional control valve 25 has an execution part control end, the output end of the control module is coupled to the execution part control end of the active directional control valve, and the output end of the hammer position detection device is coupled to the input end of the control module. When the active directional control valve 25 selects the two-position three-way solenoid valve, the control end of the executing part corresponds to the power connection end, and the output end of the control module is electrically connected with the control end of the executing part of the active directional control valve to realize coupling connection. When the active directional control valve 25 selects the hydraulic control type two-position three-way valve or the pneumatic control type two-position three-way valve, the control end of the actuator corresponds to the pilot pressure port. At the moment, a two-position three-way electromagnetic valve is also needed to realize the conversion from electric control to pressure control, and the coupling connection between the output end of the control module and the control of the execution part of the active directional control valve is realized.
The pilot type stop valve is provided with a high-pressure inlet B, a high-pressure outlet C and a pilot pressure port X, the high-pressure port P, the high-pressure inlet B and an output port pipeline of the booster pump are communicated, the pilot pressure port X is communicated with a power port A pipeline, and the high-pressure outlet C is communicated with an oil inlet pipeline.
The invention is described in detail above with reference to the figures and examples. It should be understood that in practice the description of all possible embodiments is not exhaustive and that the inventive concepts are described herein as far as possible by way of illustration. Without departing from the inventive concept of the present invention and without any creative work, a person skilled in the art should, in all of the embodiments, make optional combinations of technical features and experimental changes of specific parameters, or make a routine replacement of the disclosed technical means by using the prior art in the technical field to form specific embodiments, which belong to the content implicitly disclosed by the present invention.
Claims (10)
1. A pipeline control device comprises a pilot pipeline module and a high-pressure pipeline module; the high-pressure pipeline module comprises a pilot type stop valve, and the pilot type stop valve is provided with a high-pressure inlet B, a high-pressure outlet C and a pilot pressure port X; the pilot type directional control valve is provided with a power port A, a pressure relief port T, a high pressure port P, a pilot pressure port Y, a cavity and a c cavity, the cross section stress difference of the a cavity and the c cavity is used for driving a valve core of the pilot type directional control valve to move in two directions, the a cavity, the high pressure port P and a high pressure inlet B pipeline are communicated, the c cavity is communicated with the pilot pressure port III pipeline, the power port Y pipeline is communicated with the pilot pressure port Y pipeline, the pressure relief port I is communicated with the pressure relief port T pipeline, and the pilot pressure port X is communicated with the power port A pipeline.
2. The line control apparatus of claim 1, wherein the pilot operated shutoff valve is an actively controlled directional control cartridge.
3. The pipe control device according to claim 1, wherein the active directional control valve is a two-position three-way solenoid valve for opening a pipe between the pressure relief port (r) and the power port (c), and for opening a pipe between the power port (c) and the pressure guide port (c).
4. The line control apparatus according to claim 1, wherein the pilot-operated directional control valve is a hydraulically controlled two-position three-way selector valve for opening a line between the power port a and the pressure relief port T, and for opening a line between the high pressure port P and the power port a.
5. The line control apparatus of claim 1, wherein the high pressure line module further comprises a pressure relief valve having an inlet in line communication with the pilot pressure port X.
6. A valve body comprises a first valve body and a first valve core, wherein a power port A, a pressure relief port T and a high pressure port P are arranged on the first valve body, the first valve core is in movable sealing type sliding connection with the first valve body in the Z direction to form a two-position three-way valve, and the two-position three-way valve is sequentially provided with a cavity D communicated with a pipeline of the pressure relief port T, a cavity E communicated with a pipeline of the power port A and a cavity F communicated with a pipeline of the high pressure port P in the Z direction; it is characterized in that the preparation method is characterized in that,
a switch cavity and a valve core accommodating cavity for arranging the first valve core are arranged in the first valve body, a pressure relief port I, a power port II and a pressure guide port III are arranged on the inner wall of the switch cavity, the pressure relief port I is communicated with the pressure relief port T pipeline through a pressure relief pipeline arranged in the first valve body, and the pressure guide port III is communicated with the high pressure port P pipeline through a pressure guide pipeline arranged in the first valve body;
the first valve core comprises a head end guide part and a tail end guide part, the head end guide part is in dynamic sealing connection with the inner wall of the valve core accommodating cavity to form an a cavity communicated with the power port II pipeline, the tail end guide part is in dynamic sealing connection with the inner wall of the valve core accommodating cavity to form a c cavity communicated with the F cavity pipeline, and the maximum cross-sectional area of the hole opening of the c cavity on the Z-direction normal plane is smaller than the maximum cross-sectional area of the hole opening of the a cavity on the Z-direction normal plane.
7. The valve body of claim 6, wherein the leading end guide is a guide rod and the trailing end guide is a guide groove.
8. The valve body of claim 6, further comprising an active directional control valve disposed in the switch chamber, wherein an executing portion of the active directional control valve is configured to pipeline-communicate the pressure relief port (r) with the power port (r) while cutting off a pipeline between the power port (r) and the pressure guide port (r), and pipeline-communicate the power port (r) with the pressure guide port (r) while cutting off a pipeline between the pressure relief port (r) and the power port (r).
9. The valve body as claimed in any one of claims 6-8, further comprising a pilot operated shut-off valve having a high pressure inlet B, a high pressure outlet C and a pilot pressure port X; the high-pressure port P is communicated with the high-pressure inlet B through a pipeline, and the pilot pressure port X is communicated with the power port A through a pipeline.
10. A liquid path control system for a pile hammer comprises an oil tank, a pressure pump, a hydraulic hammer body, a hammer body position detection device and a control module, wherein an oil suction port of the pressure pump is arranged in the oil tank, the hydraulic hammer body comprises a hammer body shell and a counterweight hammer, the hammer body shell and the counterweight hammer are in dynamic sealing connection to form a hydraulic cavity, and an oil inlet communicated with a pipeline of the hydraulic cavity is formed in the hammer body shell; characterized by further comprising a valve body and a pilot operated shutoff valve according to claim 8,
the active directional control valve is provided with an execution part control end, the output end of the control module is coupled with the execution part control end of the active directional control valve, and the output end of the hammer body position detection device is coupled with the input end of the control module;
the pilot type stop valve is provided with a high-pressure inlet B, a high-pressure outlet C and a pilot pressure port X, the high-pressure port P, the high-pressure inlet B and an output port pipeline of the booster pump are communicated, the pilot pressure port X is communicated with the power port A pipeline, and the high-pressure outlet C is communicated with the oil inlet pipeline.
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| CN202110402710.7A CN113153853B (en) | 2021-04-14 | 2021-04-14 | Pipeline control device, valve body and liquid path control system for pile hammer |
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| CN113153853B (en) | 2023-05-16 |
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