CN108317114B - Feeding device control system for sand throwing fire extinguishing vehicle - Google Patents
Feeding device control system for sand throwing fire extinguishing vehicle Download PDFInfo
- Publication number
- CN108317114B CN108317114B CN201810261825.7A CN201810261825A CN108317114B CN 108317114 B CN108317114 B CN 108317114B CN 201810261825 A CN201810261825 A CN 201810261825A CN 108317114 B CN108317114 B CN 108317114B
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- cavity
- valve
- large cavity
- detection
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 239000004576 sand Substances 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 97
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims description 4
- 238000005488 sandblasting Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract description 5
- 230000010354 integration Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/005—Control arrangements
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
- F15B11/205—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members the position of the actuator controlling the fluid flow to the subsequent actuator
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a control system of a feeding device for a sand throwing fire extinguishing vehicle, which belongs to the technical field of hydraulic and electric application and comprises a power mechanism, an oil tank, a hydraulic pump, a detection valve, a two-position four-way electromagnetic reversing valve, a control valve, a left hydraulic cylinder, a middle hydraulic cylinder and a right hydraulic cylinder, and is characterized in that the power mechanism provides power for the hydraulic pump; the hydraulic pump is communicated with the oil tank; the oil outlet P of the hydraulic pump is connected with a two-position four-way electromagnetic reversing valve which is connected with a detection valve. The control system realizes feeding and discharging of materials by controlling the on-off of the oil way of the hydraulic cylinder, detects the feeding amount of the materials in real time, controls the hydraulic system, avoids excessive material blocking during feeding of the materials, enables the whole machine to work at an optimal working point, greatly reduces human misoperation, and has the advantages of high material bearing capacity, high integration level, simplicity and reliability in system and the like.
Description
Technical Field
The invention relates to a feeding device control system for a sand throwing fire extinguishing vehicle, and belongs to the technical field of hydraulic and electric application.
Background
The sand throwing fire extinguishing vehicle is applied to fire control, can be used for extinguishing special fires avoiding water, foam and carbon dioxide, plays a great role in improving the fire extinguishing efficiency, reducing the rescue risk and other aspects, and is related to the continuous and rapid development of national economy. The domestic large sand throwing fire extinguishing vehicle is still in a blank stage, because the feeding device of the sand throwing fire extinguishing vehicle is a main actuating mechanism, the traditional belt type conveying is adopted, the space occupied by a separate storage device is large, the feeding device has the dual performances of bearing, storing and conveying materials, the feeding amount of the materials cannot be detected in real time in the prior art, the hydraulic system is effectively controlled, the material feeding process can be blocked, and the whole machine is difficult to work at an optimal working point.
Disclosure of Invention
The invention provides a feeding device control system for a sand throwing fire extinguishing vehicle, which aims at the defects of the prior art. The control system realizes feeding and discharging of materials by controlling the on-off of the oil way of the hydraulic cylinder, detects the feeding amount of the materials in real time, controls the hydraulic system, avoids excessive material blocking during feeding of the materials, enables the whole machine to work at an optimal working point, greatly reduces human misoperation, and has the advantages of high material bearing capacity, high integration level, simplicity and reliability in system and the like.
In order to achieve the above object, the present invention adopts the following technical scheme: the control system of the feeding device for the sand throwing fire extinguishing vehicle comprises a power mechanism, an oil tank, a hydraulic pump, a detection valve, a two-position four-way electromagnetic reversing valve, a control valve, a left hydraulic cylinder, a middle hydraulic cylinder and a right hydraulic cylinder, and is characterized in that the power mechanism provides power for the hydraulic pump; the hydraulic pump is communicated with the oil tank; the oil outlet P of the hydraulic pump is connected with a two-position four-way electromagnetic reversing valve which is connected with a detection valve; the opening A, B of the detection valve is divided into two paths, one path of the opening A is connected with a large cavity at the lower end of the right hydraulic cylinder, and the other path of the opening A is connected with the control valve; one path of the port B of the detection valve is connected with the large cavity at the upper end of the left hydraulic cylinder, and the other path of the port B of the detection valve is connected with the control valve; the port A1 of the control valve is connected with the large cavity at the lower end of the left hydraulic cylinder, and the port B1 of the control valve is connected with the large cavity at the upper end of the right hydraulic cylinder; the large cavity at the upper end of the left hydraulic cylinder is connected with the small cavity at the lower end of the left hydraulic cylinder, and the large cavity at the upper end of the left hydraulic cylinder is connected with the large cavity at the upper end of the middle hydraulic cylinder through the one-way valve at the upper end of the left hydraulic cylinder; the large cavity at the upper end of the middle hydraulic cylinder is connected with the small cavity at the lower end of the middle hydraulic cylinder, and the large cavity at the upper end of the middle hydraulic cylinder is connected with the large cavity at the upper end of the right hydraulic cylinder through the one-way valve at the upper end of the middle hydraulic cylinder; the large cavity at the upper end of the right hydraulic cylinder is connected with the small cavity at the lower end of the right hydraulic cylinder; the large cavity at the lower end of the right hydraulic cylinder is connected with the small cavity at the upper end of the right hydraulic cylinder, and the large cavity at the lower end of the right hydraulic cylinder is connected with the large cavity at the lower end of the middle hydraulic cylinder through the one-way valve at the lower end of the right hydraulic cylinder; the large cavity at the lower end of the middle hydraulic cylinder is connected with the small cavity at the upper end of the middle hydraulic cylinder and is connected with the large cavity at the lower end of the left hydraulic cylinder through the one-way valve at the lower end of the middle hydraulic cylinder; the large cavity at the lower end of the left hydraulic cylinder is connected with the small cavity at the upper end of the left hydraulic cylinder.
Further, the hydraulic pump oil outlet P is connected with an overflow valve. And an oil return path of the control system is connected with the filter.
The check valve includes: the reversing valve, the reversing rod, the detecting piece II and the detecting piece I; the reversing rod is connected with the reversing valve, and different positions of the reversing rod are connected with the detecting pieces II and I.
The left hydraulic cylinder includes: a lower end large cavity, a lower end small cavity, an upper end large cavity, an upper end one-way valve, an upper end small cavity, a detection plate II and a first bottom plate bracket; the lower end large cavity and the lower end small cavity are arranged in the lower cylinder body and are separated by the piston and the piston rod, and the lower end large cavity is positioned below the lower end small cavity; the upper end large cavity and the upper end small cavity are separated by the piston and the piston rod in the upper cylinder body, and the upper end large cavity is positioned above the upper end small cavity; the upper end one-way valve is connected to the upper end of the left hydraulic cylinder and is communicated with the upper end large cavity; the first bottom plate bracket is fixed on a piston rod of the left hydraulic cylinder, and a detection plate II is arranged on the first bottom plate bracket; the detection plate II is used for contacting with or separating from the detection sheet II of the detection valve; when the detection plate II touches the detection piece II of the detection valve, the detection valve works in a reversing way. The size relation among the lower end large cavity, the lower end small cavity, the upper end large cavity and the upper end small cavity is not constant, the size relation can be changed along with the movement of the piston rod, the lower end large cavity and the lower end small cavity are arranged in the lower cylinder body of the left hydraulic cylinder, and the lower end large cavity is arranged below the lower end small cavity; the upper large cavity and the upper small cavity are arranged in the upper cylinder body, and the upper large cavity is arranged above the upper small cavity, and the following is the same. May also be referred to as a lower second chamber, a lower first chamber, an upper second chamber, and the like.
The intermediate hydraulic cylinder includes: the lower end check valve, the lower end large cavity, the upper end check valve, the upper end small cavity, the lower end small cavity and the second bottom plate bracket; the lower end large cavity and the lower end small cavity are arranged in the lower cylinder body and are separated by the piston and the piston rod, and the lower end large cavity is positioned below the lower end small cavity; the upper end large cavity and the upper end small cavity are separated by the piston and the piston rod in the upper cylinder body, and the upper end large cavity is positioned above the upper end small cavity; the upper end one-way valve is connected to the upper end of the middle hydraulic cylinder and is communicated with the upper end large cavity; the second bottom plate bracket is fixed on a piston rod of the middle hydraulic cylinder; the lower end check valve is connected to the lower end of the middle hydraulic cylinder and is communicated with the large cavity at the lower end of the middle hydraulic cylinder.
The right hydraulic cylinder includes: the device comprises a lower one-way valve, a lower large cavity, an upper small cavity, a lower small cavity, a third bottom plate bracket and a detection plate I; the lower end large cavity and the lower end small cavity are arranged in the lower cylinder body and are separated by the piston and the piston rod, and the lower end large cavity is positioned below the lower end small cavity; the upper end large cavity and the upper end small cavity are separated by the piston and the piston rod in the upper cylinder body, and the upper end large cavity is positioned above the upper end small cavity; the upper one-way valve is connected to the top of the upper cylinder body of the right hydraulic cylinder and is communicated with the upper large cavity; the lower end one-way valve is connected to the lower end of the right hydraulic cylinder and is communicated with the large cavity at the lower end of the right hydraulic cylinder; the third bottom plate bracket is fixed on a piston rod of the right hydraulic cylinder; a detection plate I is arranged on a third bottom plate bracket fixed on a piston rod of the right hydraulic cylinder; the detection plate I is used for contacting with or separating from the detection sheet I of the detection valve; when the detection plate I touches the detection piece I of the detection valve, the detection valve works in a reversing mode.
When the system is controlled to unload, the power mechanism makes the hydraulic pump absorb oil from the oil tank, and the oil pumped by the hydraulic pump enters the right position of the two-position four-way electromagnetic valve and returns to the oil tank to control the system to unload.
When feeding downwards, an electromagnet Y1 of the two-position four-way electromagnetic reversing valve is electrified, a hydraulic pump absorbs oil from an oil tank, oil pumped by the hydraulic pump is divided into two paths after passing through the left position of the two-position four-way electromagnetic valve and passing through the right position of the detection valve, one path of oil enters a large cavity at the lower end of the right hydraulic cylinder and a small cavity at the upper end of the right hydraulic cylinder connected with the large cavity at the lower end of the right hydraulic cylinder through an opening of the detection valve A, so that a one path of oil enters the large cavity at the lower end of the middle hydraulic cylinder and the small cavity at the upper end of the middle hydraulic cylinder connected with the large cavity at the lower end of the middle hydraulic cylinder by opening a one-way valve at the lower end of the right hydraulic cylinder; the other path of oil enters a large cavity at the lower end of the left hydraulic cylinder and a small cavity at the upper end of the left hydraulic cylinder connected with the large cavity at the lower end of the left hydraulic cylinder through a right position A1 port of the control valve;
the piston rod of the left hydraulic cylinder drives a first bottom plate bracket fixed with the piston rod to move, and a bottom plate fixed on the first bottom plate bracket extends upwards; the upper end large cavity of the right hydraulic cylinder and the lower end small cavity of the right hydraulic cylinder connected with the upper end large cavity of the right hydraulic cylinder are connected with the right position B1 port of the control valve, and the oil return path is blocked due to the upper end one-way valve of the middle hydraulic cylinder, so that the right hydraulic cylinder is kept motionless; the middle hydraulic cylinder is blocked by an upper one-way valve of the left hydraulic cylinder and an oil return path of the upper one-way valve of the middle hydraulic cylinder, and the middle hydraulic cylinder is kept motionless;
when the left hydraulic cylinder moves upwards to the stroke end, the check valve at the upper end of the left hydraulic cylinder is opened, the oil return passage of the middle hydraulic cylinder is opened, the piston rod of the middle hydraulic cylinder drives the second bottom plate bracket fixed with the piston rod to move, and the bottom plate fixed on the second bottom plate bracket extends upwards; the left hydraulic cylinder and the right hydraulic cylinder are kept motionless;
when the middle hydraulic cylinder moves upwards to the stroke end, a one-way valve at the upper end of the middle hydraulic cylinder is opened, an oil return passage of the right hydraulic cylinder is opened, a piston rod of the right hydraulic cylinder drives a third bottom plate bracket fixed with the right hydraulic cylinder to move, and a bottom plate fixed on the third bottom plate bracket extends upwards; the left hydraulic cylinder and the middle hydraulic cylinder are kept motionless; during this process the material remains stationary;
and a detection plate I is arranged on a third bottom plate bracket fixed on a piston rod of the right hydraulic cylinder, and when the right hydraulic cylinder moves to a stroke end, the detection plate I touches a detection piece I fixed on a detection valve reversing rod, and the detection valve is switched to work at a left position in a reversing way.
The hydraulic pump sucks oil from an oil tank, oil pumped by the hydraulic pump passes through a left port B of the detection valve and then enters a large cavity at the upper end of a left hydraulic cylinder and a small cavity at the lower end of the left hydraulic cylinder connected with the large cavity, the oil then opens a check valve at the upper end of the left hydraulic cylinder and enters a large cavity at the upper end of a middle hydraulic cylinder and a small cavity at the lower end of the middle hydraulic cylinder connected with the large cavity, and opens a check valve at the upper end of the middle hydraulic cylinder and enters a large cavity at the upper end of the right hydraulic cylinder and a small cavity at the lower end of the right hydraulic cylinder connected with the large cavity; the large cavity at the lower end of the left hydraulic cylinder and the small cavity at the upper end of the left hydraulic cylinder connected with the large cavity at the lower end of the left hydraulic cylinder return oil through the right opening A1 of the control valve, the large cavity at the lower end of the middle hydraulic cylinder and the small cavity at the upper end of the middle hydraulic cylinder are connected with the large cavity at the upper end of the middle hydraulic cylinder, the one-way valve at the lower end of the middle hydraulic cylinder is opened, the large cavity at the lower end of the left hydraulic cylinder returns oil through the right opening A1 of the control valve, and the right hydraulic cylinder returns oil through the left opening A of the detection valve; the piston rods of the left hydraulic cylinder, the middle hydraulic cylinder and the right hydraulic cylinder drive the bottom plate brackets fixed with the left hydraulic cylinder, the middle hydraulic cylinder and the right hydraulic cylinder to move together, each group of bottom plates move downwards together, and materials move downwards; and a detection plate II is arranged on the first bottom plate bracket fixed on the piston rod of the left hydraulic cylinder, and when the piston rods of the left hydraulic cylinder, the middle hydraulic cylinder and the right hydraulic cylinder all move to the stroke end (namely the lowest stroke end), the detection plate II touches a detection plate II fixed on the detection valve reversing rod, and the detection valve is switched to work at the right position in a reversing way.
Compared with the prior art, the invention has the beneficial effects that: the control system realizes feeding and discharging of materials by controlling the on-off of the oil way of the hydraulic cylinder, detects the feeding amount of the materials in real time, controls the hydraulic system, avoids excessive material blocking during feeding of the materials, enables the whole machine to work at an optimal working point, greatly reduces human misoperation, and has the advantages of high material bearing capacity, high integration level, simplicity and reliability in system and the like.
Drawings
FIG. 1 is a schematic diagram of a hydraulic system of a feeding device for a sand throwing fire extinguishing vehicle, wherein a piston rod in FIG. 1 is positioned in the middle of the stroke of a hydraulic cylinder;
FIG. 2 is a schematic diagram of automatic reversing of a check valve;
FIG. 3 is a schematic diagram of an assembly structure of a base plate bracket, a base plate and a hydraulic cylinder;
in the figure: 1-engine, 2-oil tank, 3-hydraulic pump, 4-filter, 5-overflow valve, 6-two-position four-way electromagnetic reversing valve, 7-check valve, 8-control valve, 9-left side hydraulic cylinder, 10-middle hydraulic cylinder, 11-right side hydraulic cylinder, 7.1-reversing valve, 7.2-reversing rod, 7.3-detecting piece II, 7.4-detecting piece I, 9.1-lower end big cavity, 9.2-lower end small cavity, 9.3-upper end big cavity, 9.4-upper end check valve, 9.5-upper end small cavity, 9.6-detecting plate II, 9.7-first bottom plate bracket, 10.1-lower end check valve, 10.2-lower end big cavity, 10.3-upper end big cavity, 10.4-upper end check valve, 10.5-upper end small cavity, 10.6-lower end small cavity, 10.7-second bottom plate bracket, 11.1-lower end check valve, 11.2-lower end big cavity, 11.3-lower end small cavity, 11.7-second bottom plate bracket, 11.1-lower end bracket, 11.2-lower end small cavity.
Detailed Description
The present invention is described in detail below. In the following paragraphs, the different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless explicitly stated to be non-combinable. In particular, any feature or features may be combined with one or more other features may be desired and advantageous.
According to fig. 1-2, a feed device control system for a sand throwing fire extinguishing vehicle comprises: the hydraulic system comprises an engine 1 (namely a power mechanism), an oil tank 2, a hydraulic pump 3, a filter 4, an overflow valve 5, a two-position four-way electromagnetic reversing valve 6, a detection valve 7, a control valve 8, a left hydraulic cylinder 9, a middle hydraulic cylinder 10 and a right hydraulic cylinder 11.
The detection valve 7 includes: reversing valve 7.1, reversing rod 7.2, detecting piece II 7.3 and detecting piece I7.4.
The left hydraulic cylinder 9 includes: the lower end large cavity 9.1, the lower end small cavity 9.2, the upper end large cavity 9.3, the upper end one-way valve 9.4, the upper end small cavity 9.5, the detection plate II 9.6 and the first bottom plate bracket 9.7.
The intermediate hydraulic cylinder 10 includes: the lower end check valve 10.1, the lower end big cavity 10.2, the upper end big cavity 10.3, the upper end check valve 10.4, the upper end small cavity 10.5, the lower end small cavity 10.6 and the second bottom plate bracket 10.7.
The right hydraulic cylinder 11 includes: the lower end check valve 11.1, the lower end big cavity 11.2, the upper end big cavity 11.3, the upper end small cavity 11.4, the lower end small cavity 11.5, the third bottom plate bracket 11.6 and the detection plate I11.7.
The engine 1 drives the hydraulic pump 3, so that the hydraulic pump 3 absorbs oil from the oil tank 2, an oil outlet P (i.e. a main oil inlet P) of the hydraulic pump is connected with a two-position four-way electromagnetic directional valve 6, and the two-position four-way electromagnetic directional valve 6 is connected with a detection valve 7. The detection valve 7A (working oil inlet) and the B (working oil return port) are respectively divided into two paths, one path of the A port is connected with the large cavity 11.2 at the lower end of the right hydraulic cylinder 11, and the other path is connected with the control valve 8; one path of the port B is connected with the large cavity 9.3 at the upper end of the left hydraulic cylinder 9, and the other path is connected with the control valve 8. The port (working oil inlet) of the control valve 8 A1 is connected with the large cavity 9.1 at the lower end of the left hydraulic cylinder 9, and the port (working oil return port) of the control valve B1 is connected with the large cavity 11.3 at the upper end of the right hydraulic cylinder 11. The upper large cavity 9.3 of the left hydraulic cylinder 9 is connected with the lower small cavity 9.2, and the upper large cavity 9.3 is connected with the upper large cavity 10.3 of the middle hydraulic cylinder 10 through the upper one-way valve 9.4 of the left hydraulic cylinder 9. The upper big cavity 10.3 of the middle hydraulic cylinder 10 is connected with the lower small cavity 10.6, and the upper big cavity 10.3 of the middle hydraulic cylinder 10 is connected with the upper big cavity 11.3 of the right hydraulic cylinder 11 through the one-way valve 10.4 at the upper end of the middle hydraulic cylinder 10. The upper big cavity 11.3 of the right hydraulic cylinder 11 is connected with the lower small cavity 11.5. The big cavity 11.2 at the lower end of the right hydraulic cylinder 11 is connected with the small cavity 11.4 at the upper end, and the big cavity 11.2 at the lower end of the right hydraulic cylinder 11 is connected with the big cavity 10.2 at the lower end of the middle hydraulic cylinder 10 through the one-way valve 11.1 at the lower end of the right hydraulic cylinder 11. The big cavity 10.2 at the lower end of the middle hydraulic cylinder 10 is connected with the small cavity 10.5 at the upper end, and is connected with the big cavity 9.1 at the lower end of the left hydraulic cylinder 9 through the check valve 10.1 at the lower end of the middle hydraulic cylinder 10. The big cavity 9.1 at the lower end of the left hydraulic cylinder 9 is connected with the small cavity 9.5 at the upper end. The outlet P of the hydraulic pump 3 is connected with an overflow valve 5, the highest pressure of the system is limited, and the return oil path of the hydraulic system is connected with a filter 4, so that the cleanliness of oil is ensured.
The operation flow is as follows: the system is unloaded, the engine 1 drives the hydraulic pump 3, the hydraulic pump 3 absorbs oil from the oil tank 2, the oil pumped by the hydraulic pump 3 enters the right position of the two-position four-way electromagnetic valve 6 and returns to the oil tank 2, and the hydraulic system (i.e. the control system) is unloaded.
Taking the illustrated directions (fig. 1, 2 and 3) as examples:
feeding downwards, powering an electromagnet Y1, absorbing oil by a hydraulic pump 3 from an oil tank 2, dividing the oil pumped by the hydraulic pump 3 into two paths after passing through the left position of a two-position four-way electromagnetic valve 6 and the right position of a detection valve 7, entering a large cavity 11.2 at the lower end of a right hydraulic cylinder 11 and a small cavity 11.4 at the upper end connected with the large cavity through an opening A, and opening a one-way valve 11.1 at the lower end of the right hydraulic cylinder 11 to enter a large cavity 10.2 at the lower end of a middle hydraulic cylinder 10 and a small cavity 10.5 at the upper end connected with the large cavity; one path enters the big cavity 9.1 at the lower end of the left hydraulic cylinder 9 and the small cavity 9.5 at the upper end connected with the big cavity through the opening A1 at the right position of the control valve 8. The upper end large cavity 9.3 of the left hydraulic cylinder 9 and the lower end small cavity 9.2 connected with the large cavity are used for oil return through the opening B of the detection valve 7, the piston rod of the left hydraulic cylinder 9 drives the first bottom plate bracket 9.7 fixed with the piston rod to move, and the bottom plate fixed on the first bottom plate bracket 9.7 extends upwards. The bottom plate 12 is arranged on the upper surface of the bottom plate support, is perpendicular to the longer side of the bottom plate support and is consistent with the movement direction of the piston rod, is sequentially arranged on the first bottom plate support, the second bottom plate support and the third bottom plate support, three groups are arranged according to the requirement, only one group is shown (one group of bottom plates consists of three bottom plates respectively fixed on the first bottom plate support, the second bottom plate support and the third bottom plate support), the bottom plate is shown in fig. 3, and materials are placed on all or part of the bottom plates. The upper end large cavity 11.3 of the right hydraulic cylinder 11 and the lower end small cavity 11.5 connected with the upper end large cavity are connected with the right position B1 port of the control valve 8, and the oil return path is blocked due to the action of the upper end one-way valve 10.4 of the middle hydraulic cylinder 10, so that the right hydraulic cylinder 11 is kept motionless. The middle hydraulic cylinder 10 is plugged due to the action of the upper end check valve 9.4 of the left hydraulic cylinder 9 and the upper end check valve 10.4 of the middle hydraulic cylinder 10, and the middle hydraulic cylinder 10 is kept still. When the left hydraulic cylinder 9 moves upwards to the stroke end, the check valve 9.4 at the upper end of the left hydraulic cylinder 9 is opened, the oil return passage of the middle hydraulic cylinder 10 is opened, the piston rod of the middle hydraulic cylinder 10 drives the second bottom plate bracket 10.7 fixed with the piston rod to move, and the bottom plate fixed on the second bottom plate bracket 10.7 extends upwards. The left hydraulic cylinder 9 and the right hydraulic cylinder 11 remain stationary. When the middle hydraulic cylinder 10 moves upwards to the stroke end, the check valve 10.4 at the upper end of the middle hydraulic cylinder 10 is opened, the oil return passage of the right hydraulic cylinder 11 is opened, the piston rod of the right hydraulic cylinder 11 drives the third bottom plate bracket 11.6 fixed with the piston rod to move, and the bottom plate fixed on the third bottom plate bracket 11.6 extends upwards. The left hydraulic cylinder 9 and the middle hydraulic cylinder 10 remain stationary, during which the material remains stationary. The detection plate I11.7 is installed on the third bottom plate bracket 11.6 fixed on the piston rod of the right hydraulic cylinder 11, when the right hydraulic cylinder 11 moves to the stroke end, the detection plate I11.7 touches the detection plate I7.4 fixed on the reversing rod 7.2 of the detection valve 7, and the detection valve 7 is switched to the left position for operation in a reversing manner, as shown in fig. 2.
The check valve 7 operates in the left position. The hydraulic pump 3 absorbs oil from the oil tank 2, the oil pumped by the hydraulic pump 3 passes through the left port B of the detection valve 7 again through the left position of the two-position four-way electromagnetic valve 6, enters the large cavity 9.3 at the upper end of the left hydraulic cylinder 9 and the small cavity 9.2 at the lower end connected with the large cavity, the oil again opens the one-way valve 9.4 at the upper end of the left hydraulic cylinder 9, enters the large cavity 10.3 at the upper end of the middle hydraulic cylinder 10 and the small cavity 10.6 at the lower end connected with the large cavity 10.3, and opens the one-way valve 10.4 at the upper end of the middle hydraulic cylinder 10, and enters the large cavity 11.3 at the upper end of the right hydraulic cylinder 11 and the small cavity 11.5 at the lower end connected with the large cavity. The large cavity 9.1 at the lower end of the left hydraulic cylinder 9 and the small cavity 9.5 at the upper end connected with the large cavity are used for oil return through the right opening A1 of the control valve 8, the large cavity 10.2 at the lower end of the middle hydraulic cylinder 10 and the small cavity 10.5 at the upper end connected with the large cavity open the one-way valve 10.1 at the lower end of the middle hydraulic cylinder 10, and the large cavity 9.1 at the lower end of the left hydraulic cylinder 9 and the right opening A1 of the control valve 8 are used for oil return, and the right hydraulic cylinder 11 is used for oil return through the left opening A of the detection valve 7. The three hydraulic cylinder piston rods drive the bottom plate brackets fixed with the three hydraulic cylinder piston rods to move together, all the bottom plates move downwards together, and materials move downwards. The detection plate II 9.6 is installed on the first bottom plate bracket 9.7 fixed on the piston rod of the left hydraulic cylinder 9, when the three hydraulic cylinders move to the stroke end, the detection plate II 9.6 touches the detection plate II 7.3 fixed on the reversing rod 7.2 of the detection valve 7, and the detection valve 7 is switched to work at the right position in a reversing way. The next working cycle is entered.
Upward feeding, power is obtained by Y1 (two-position four-way electromagnetic valve) and Y2 (control valve), and the detection valve 7 works in the right position. The principle of operation is similar to the feed down and will not be described in detail.
The hydraulic cylinder is horizontally installed in practice, forward transportation and backward unloading of materials can be completed according to downward feeding and upward feeding of a drawing, the materials are conveyed forward to a throwing device of a sand throwing fire truck, material feeding of the whole truck is completed, the processing capacity of the throwing device is not matched with the feeding capacity of the materials, blocking easily occurs, a material level sensor is arranged in a material storage area of the throwing device, the maximum value and the minimum value of the material level can be input to a controller, when the actual material level is higher than the maximum value, the Y1 is in power failure, a hydraulic system is unloaded, material feeding is stopped, when the actual material is lower than the minimum value, the Y1 is powered, the hydraulic system works, and the materials continue to be fed.
The feeding device has the dual performances of bearing, storing and conveying materials, controls a hydraulic system in real time how to detect the feeding amount of the materials, avoids excessive material blocking during feeding of the materials, enables the whole machine to work at an optimal working condition point, and is a key technology of the whole feeding device how to realize feeding and discharging of the materials. The system realizes feeding and discharging of materials by controlling the on-off of the oil way of the hydraulic cylinder, detects the feeding amount of the materials in real time, controls the hydraulic system, avoids excessive material blocking during feeding of the materials, enables the whole machine to work at an optimal working point, greatly reduces human misoperation, and has the advantages of high material bearing capacity, high integration level, simple and reliable system and the like.
It should be noted that the foregoing embodiments of the present invention are merely examples, and are not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes using the content of the present invention or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (6)
1. The control system of the feeding device for the sand throwing fire extinguishing vehicle comprises a power mechanism, an oil tank, a hydraulic pump, a detection valve, a two-position four-way electromagnetic reversing valve, a control valve, a left hydraulic cylinder, a middle hydraulic cylinder and a right hydraulic cylinder, and is characterized in that the power mechanism provides power for the hydraulic pump; the hydraulic pump is communicated with the oil tank; the oil outlet P of the hydraulic pump is connected with a two-position four-way electromagnetic reversing valve which is connected with a detection valve; the opening A, B of the detection valve is divided into two paths, one path of the opening A is connected with a large cavity at the lower end of the right hydraulic cylinder, and the other path of the opening A is connected with the control valve; one path of the port B of the detection valve is connected with the large cavity at the upper end of the left hydraulic cylinder, and the other path of the port B of the detection valve is connected with the control valve; the port A1 of the control valve is connected with the large cavity at the lower end of the left hydraulic cylinder, and the port B1 of the control valve is connected with the large cavity at the upper end of the right hydraulic cylinder; the large cavity at the upper end of the left hydraulic cylinder is connected with the small cavity at the lower end of the left hydraulic cylinder, and the large cavity at the upper end of the left hydraulic cylinder is connected with the large cavity at the upper end of the middle hydraulic cylinder through the one-way valve at the upper end of the left hydraulic cylinder; the large cavity at the upper end of the middle hydraulic cylinder is connected with the small cavity at the lower end of the middle hydraulic cylinder, and the large cavity at the upper end of the middle hydraulic cylinder is connected with the large cavity at the upper end of the right hydraulic cylinder through the one-way valve at the upper end of the middle hydraulic cylinder; the large cavity at the upper end of the right hydraulic cylinder is connected with the small cavity at the lower end of the right hydraulic cylinder; the large cavity at the lower end of the right hydraulic cylinder is connected with the small cavity at the upper end of the right hydraulic cylinder, and the large cavity at the lower end of the right hydraulic cylinder is connected with the large cavity at the lower end of the middle hydraulic cylinder through the one-way valve at the lower end of the right hydraulic cylinder; the large cavity at the lower end of the middle hydraulic cylinder is connected with the small cavity at the upper end of the middle hydraulic cylinder and is connected with the large cavity at the lower end of the left hydraulic cylinder through the one-way valve at the lower end of the middle hydraulic cylinder; the large cavity at the lower end of the left hydraulic cylinder is connected with the small cavity at the upper end of the left hydraulic cylinder;
the check valve includes: the reversing valve, the reversing rod, the detecting piece II and the detecting piece I; the reversing rod is connected with the reversing valve, and different positions of the reversing rod are connected with the detecting pieces II and I;
the left hydraulic cylinder includes: a lower end large cavity, a lower end small cavity, an upper end large cavity, an upper end one-way valve, an upper end small cavity, a detection plate II and a first bottom plate bracket;
the lower end large cavity and the lower end small cavity are arranged in the lower cylinder body and are separated by the piston and the piston rod, and the lower end large cavity is positioned below the lower end small cavity; the upper end large cavity and the upper end small cavity are separated by the piston and the piston rod in the upper cylinder body, and the upper end large cavity is positioned above the upper end small cavity; the upper end one-way valve is connected to the upper end of the left hydraulic cylinder and is communicated with the upper end large cavity; the first bottom plate bracket is fixed on a piston rod of the left hydraulic cylinder, and a detection plate II is arranged on the first bottom plate bracket; the detection plate II is used for contacting with or separating from the detection sheet II of the detection valve; when the detection plate II touches the detection sheet II of the detection valve, the detection valve works in a reversing way;
the intermediate hydraulic cylinder includes: the lower end check valve, the lower end large cavity, the upper end check valve, the upper end small cavity, the lower end small cavity and the second bottom plate bracket; the lower end large cavity and the lower end small cavity are arranged in the lower cylinder body and are separated by the piston and the piston rod, and the lower end large cavity is positioned below the lower end small cavity; the upper end large cavity and the upper end small cavity are separated by the piston and the piston rod in the upper cylinder body, and the upper end large cavity is positioned above the upper end small cavity; the upper end one-way valve is connected to the upper end of the middle hydraulic cylinder and is communicated with the upper end large cavity; the second bottom plate bracket is fixed on a piston rod of the middle hydraulic cylinder; the lower end one-way valve is connected to the lower end of the middle hydraulic cylinder and is communicated with the large cavity at the lower end of the middle hydraulic cylinder;
the right hydraulic cylinder includes: the device comprises a lower one-way valve, a lower large cavity, an upper small cavity, a lower small cavity, a third bottom plate bracket and a detection plate I; the lower end large cavity and the lower end small cavity are arranged in the lower cylinder body and are separated by the piston and the piston rod, and the lower end large cavity is positioned below the lower end small cavity; the upper end large cavity and the upper end small cavity are separated by the piston and the piston rod in the upper cylinder body, and the upper end large cavity is positioned above the upper end small cavity; the upper one-way valve is connected to the top of the upper cylinder body of the right hydraulic cylinder and is communicated with the upper large cavity; the lower end one-way valve is connected to the lower end of the right hydraulic cylinder and is communicated with the large cavity at the lower end of the right hydraulic cylinder; the third bottom plate bracket is fixed on a piston rod of the right hydraulic cylinder; a detection plate I is arranged on a third bottom plate bracket fixed on a piston rod of the right hydraulic cylinder; the detection plate I is used for contacting with or separating from the detection sheet I of the detection valve; when the detection plate I touches the detection piece I of the detection valve, the detection valve works in a reversing mode.
2. The control system of a feeding device for a sand throwing fire extinguishing vehicle according to claim 1, wherein the hydraulic pump outlet P is connected with an overflow valve.
3. The control system of a feeding device for a sand blasting fire-extinguishing vehicle according to claim 1, wherein an oil return path of the control system is connected with a filter.
4. The control system of the feeding device for the sand throwing fire extinguishing vehicle according to claim 1, wherein when the control system is unloaded, the power mechanism enables the hydraulic pump to absorb oil from the oil tank, and the oil pumped by the hydraulic pump enters the right position of the two-position four-way electromagnetic directional valve and returns to the oil tank, so that the control system is unloaded.
5. The control system of the feeding device for the sand throwing fire extinguishing vehicle according to claim 1, wherein when the sand throwing fire extinguishing vehicle is fed downwards, an electromagnet Y1 of a two-position four-way electromagnetic directional valve is electrified, a hydraulic pump absorbs oil from an oil tank, oil pumped by the hydraulic pump passes through the left position of the two-position four-way electromagnetic directional valve and then passes through the right position of a detection valve to be divided into two paths, one path of oil enters a large cavity at the lower end of a right hydraulic cylinder and a small cavity at the upper end of the right hydraulic cylinder connected with the large cavity at the lower end of the right hydraulic cylinder through an opening A of the detection valve, so that a one path of oil enters the large cavity at the lower end of the middle hydraulic cylinder and the small cavity at the upper end of the middle hydraulic cylinder connected with the large cavity at the lower end of the middle hydraulic cylinder by opening a one-way check valve at the lower end of the right hydraulic cylinder; the other path of oil enters a large cavity at the lower end of the left hydraulic cylinder and a small cavity at the upper end of the left hydraulic cylinder connected with the large cavity at the lower end of the left hydraulic cylinder through a right position A1 port of the control valve;
the piston rod of the left hydraulic cylinder drives a first bottom plate bracket fixed with the piston rod to move, and a bottom plate fixed on the first bottom plate bracket extends upwards; the upper end large cavity of the right hydraulic cylinder and the lower end small cavity of the right hydraulic cylinder connected with the upper end large cavity of the right hydraulic cylinder are connected with the right position B1 port of the control valve, and the oil return path is blocked due to the upper end one-way valve of the middle hydraulic cylinder, so that the right hydraulic cylinder is kept motionless; the middle hydraulic cylinder is blocked by an upper one-way valve of the left hydraulic cylinder and an oil return path of the upper one-way valve of the middle hydraulic cylinder, and the middle hydraulic cylinder is kept motionless;
when the left hydraulic cylinder moves upwards to the stroke end, the check valve at the upper end of the left hydraulic cylinder is opened, the oil return passage of the middle hydraulic cylinder is opened, the piston rod of the middle hydraulic cylinder drives the second bottom plate bracket fixed with the piston rod to move, and the bottom plate fixed on the second bottom plate bracket extends upwards; the left hydraulic cylinder and the right hydraulic cylinder are kept motionless;
when the middle hydraulic cylinder moves upwards to the stroke end, a one-way valve at the upper end of the middle hydraulic cylinder is opened, an oil return passage of the right hydraulic cylinder is opened, a piston rod of the right hydraulic cylinder drives a third bottom plate bracket fixed with the right hydraulic cylinder to move, and a bottom plate fixed on the third bottom plate bracket extends upwards; the left hydraulic cylinder and the middle hydraulic cylinder are kept motionless; during this process the material remains stationary;
and a detection plate I is arranged on a third bottom plate bracket fixed on a piston rod of the right hydraulic cylinder, and when the right hydraulic cylinder moves to a stroke end, the detection plate I touches a detection piece I fixed on a detection valve reversing rod, and the detection valve is switched to work at a left position in a reversing way.
6. The control system of the feeding device for the sand throwing fire extinguishing vehicle according to claim 1, wherein the detection valve works leftwards, the hydraulic pump sucks oil from the oil tank, the oil pumped by the hydraulic pump passes through the left position B port of the detection valve and enters the large cavity at the upper end of the left hydraulic cylinder and the small cavity at the lower end of the left hydraulic cylinder connected with the large cavity, the oil opens the one-way valve at the upper end of the left hydraulic cylinder and enters the large cavity at the upper end of the middle hydraulic cylinder and the small cavity at the lower end of the middle hydraulic cylinder connected with the large cavity, and opens the one-way valve at the upper end of the middle hydraulic cylinder and the small cavity at the lower end of the right hydraulic cylinder connected with the large cavity; the large cavity at the lower end of the left hydraulic cylinder and the small cavity at the upper end of the left hydraulic cylinder connected with the large cavity at the lower end of the left hydraulic cylinder return oil through the right opening A1 of the control valve, the large cavity at the lower end of the middle hydraulic cylinder and the small cavity at the upper end of the middle hydraulic cylinder connected with the large cavity at the upper end of the middle hydraulic cylinder open the one-way valve at the lower end of the middle hydraulic cylinder, return oil through the large cavity at the lower end of the left hydraulic cylinder and the right opening A1 of the control valve, and return oil through the left opening A of the detection valve; the piston rods of the left hydraulic cylinder, the middle hydraulic cylinder and the right hydraulic cylinder drive the bottom plate brackets fixed with the left hydraulic cylinder, the middle hydraulic cylinder and the right hydraulic cylinder to move together, each group of bottom plates move downwards together, and materials move downwards; and when the left hydraulic cylinder, the middle hydraulic cylinder and the right hydraulic cylinder all move to the stroke end, the detection plate II touches the detection piece II fixed on the detection valve reversing rod, and the detection valve is switched to work in the right position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810261825.7A CN108317114B (en) | 2018-03-28 | 2018-03-28 | Feeding device control system for sand throwing fire extinguishing vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810261825.7A CN108317114B (en) | 2018-03-28 | 2018-03-28 | Feeding device control system for sand throwing fire extinguishing vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108317114A CN108317114A (en) | 2018-07-24 |
| CN108317114B true CN108317114B (en) | 2023-11-03 |
Family
ID=62899306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810261825.7A Active CN108317114B (en) | 2018-03-28 | 2018-03-28 | Feeding device control system for sand throwing fire extinguishing vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108317114B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109513146B (en) * | 2018-12-29 | 2024-03-01 | 江苏徐工工程机械研究院有限公司 | Material conveying device and sand throwing fire extinguishing vehicle |
| CN110420423B (en) * | 2019-08-12 | 2024-07-02 | 江苏徐工工程机械研究院有限公司 | Sand throwing fire extinguishing vehicle and control method thereof |
| CN113700695B (en) * | 2021-08-13 | 2023-09-08 | 中国煤炭科工集团太原研究院有限公司 | Power transmission device for different mediums and use method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3929651A1 (en) * | 1988-09-30 | 1990-04-05 | Bucher Gmbh | Hydraulic control system for silage cutter - has pressure-controlled throttle valves between ram working chambers |
| US5292006A (en) * | 1992-01-08 | 1994-03-08 | Girts Jr David M | Screening apparatus |
| CA2260645A1 (en) * | 1998-02-06 | 1999-08-06 | Richard T. Gist | Fluid drive for reciprocating floor |
| EP1172565A2 (en) * | 2000-07-10 | 2002-01-16 | Shin Caterpillar Mitsubishi Ltd. | Hydraulic circuit for construction machine |
| JP2003247503A (en) * | 2002-02-25 | 2003-09-05 | Mitsubishi Heavy Ind Ltd | Flow rate regulator of hydraulic pump in force-feeding machine |
| JP2008195111A (en) * | 2007-02-08 | 2008-08-28 | Shin Meiwa Ind Co Ltd | Cargo carrying apparatus |
| CN102423521A (en) * | 2011-09-14 | 2012-04-25 | 徐州重型机械有限公司 | Fire extinguishing system and fire engine containing the same |
| CN103423221A (en) * | 2013-07-24 | 2013-12-04 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine |
| CN105545847A (en) * | 2016-02-26 | 2016-05-04 | 华侨大学 | Hydraulic control system of crusher |
| CN208089655U (en) * | 2018-03-28 | 2018-11-13 | 徐工集团工程机械有限公司 | A kind of automobile-used feeding equipment control system of sand throwing fire extinguishing |
-
2018
- 2018-03-28 CN CN201810261825.7A patent/CN108317114B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3929651A1 (en) * | 1988-09-30 | 1990-04-05 | Bucher Gmbh | Hydraulic control system for silage cutter - has pressure-controlled throttle valves between ram working chambers |
| US5292006A (en) * | 1992-01-08 | 1994-03-08 | Girts Jr David M | Screening apparatus |
| CA2260645A1 (en) * | 1998-02-06 | 1999-08-06 | Richard T. Gist | Fluid drive for reciprocating floor |
| EP1172565A2 (en) * | 2000-07-10 | 2002-01-16 | Shin Caterpillar Mitsubishi Ltd. | Hydraulic circuit for construction machine |
| JP2003247503A (en) * | 2002-02-25 | 2003-09-05 | Mitsubishi Heavy Ind Ltd | Flow rate regulator of hydraulic pump in force-feeding machine |
| JP2008195111A (en) * | 2007-02-08 | 2008-08-28 | Shin Meiwa Ind Co Ltd | Cargo carrying apparatus |
| CN102423521A (en) * | 2011-09-14 | 2012-04-25 | 徐州重型机械有限公司 | Fire extinguishing system and fire engine containing the same |
| CN103423221A (en) * | 2013-07-24 | 2013-12-04 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine |
| CN105545847A (en) * | 2016-02-26 | 2016-05-04 | 华侨大学 | Hydraulic control system of crusher |
| CN208089655U (en) * | 2018-03-28 | 2018-11-13 | 徐工集团工程机械有限公司 | A kind of automobile-used feeding equipment control system of sand throwing fire extinguishing |
Non-Patent Citations (1)
| Title |
|---|
| 运砂车液压系统的设计;史晓昌;;汽车实用技术(第07期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108317114A (en) | 2018-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108317114B (en) | Feeding device control system for sand throwing fire extinguishing vehicle | |
| CN102575690B (en) | Hydraulic system for operating machine | |
| CN201661532U (en) | Hydraulic pumping system of concrete pump | |
| CN101865189A (en) | Electro-hydraulic control system for concrete or coal slime conveying device and method for controlling system | |
| CN105484311B (en) | Without spill losses loader hydraulic work system and its control method | |
| CN109058187B (en) | Unloading buffer hydraulic system | |
| CN102384113B (en) | Oil supply and energy-saving device for mining dump truck | |
| CN105799201A (en) | Parallel independent metal scrap classifying and briquetting machine and hydraulic control system thereof | |
| US9623463B2 (en) | Hydraulic press brake | |
| CN103754798B (en) | A kind of semi-electric self-lifting loading and unloading car | |
| CN205329757U (en) | No spill losses loader hydraulic pressure work systems | |
| CN102616700B (en) | Oil and air hybrid driven lifting control device | |
| CN207620022U (en) | Folder wood fork loading machine energy-saving hydraulic system | |
| CN108468672B (en) | Energy-saving hydraulic system of stepping heating furnace | |
| CN107964992B (en) | Energy-saving hydraulic system of wood clamping fork loader | |
| CN210160804U (en) | Automatic feeding device for water plugging hole processing of engine cylinder cover | |
| CN208089655U (en) | A kind of automobile-used feeding equipment control system of sand throwing fire extinguishing | |
| CN209176568U (en) | Wide dumper hydraulic lifting system | |
| CN114151398A (en) | Hydraulic control system of vertical garbage compression station | |
| CN112343898A (en) | Hydraulic system of large plate shearing machine | |
| CN206176970U (en) | Semi -automatic multilayer drying -machine | |
| CN218509841U (en) | Hydraulic valve set for movable garbage compression equipment | |
| CN105058534B (en) | The wood fiber processing equipment of large-scale round log | |
| CN1762778A (en) | Unloading machine having energy-storage function | |
| CN113374745B (en) | Hydraulic system for continuously conveying drill rods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220714 Address after: No.26 tuolanshan Road, Xuzhou Economic and Technological Development Zone, Xuzhou City, Jiangsu Province Applicant after: Jiangsu Xugong Construction Machinery Research Institute Co.,Ltd. Address before: 221004 26 Jinshan Road, Jinshan Bridge Economic Development Zone, Xuzhou, Jiangsu Applicant before: XCMG CONSTRUCTION MACHINERY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |