CN107676322B - Hydraulic distributor - Google Patents
Hydraulic distributor Download PDFInfo
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- CN107676322B CN107676322B CN201710953734.5A CN201710953734A CN107676322B CN 107676322 B CN107676322 B CN 107676322B CN 201710953734 A CN201710953734 A CN 201710953734A CN 107676322 B CN107676322 B CN 107676322B
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- 239000007788 liquid Substances 0.000 claims abstract description 130
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 123
- 239000012530 fluid Substances 0.000 description 26
- 238000004891 communication Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- F15B13/022—Flow-dividers; Priority valves
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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
- F15B13/024—Pressure relief valves
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention relates to modification of a hydraulic system for an excavator, which comprises a distributor body and a hydraulic control reversing valve, wherein the distributor body comprises a first pilot oil input port, a second pilot oil input port, a pilot oil return output port, a third hydraulic signal output port, a first runner, a second runner, a third runner and steel balls which are displaced in the middle section of the third runner, and the steel balls are jointed with conical surface flaring at two ends of the middle section to realize sealing. The distributor body further comprises a liquid flow input pipe, a liquid flow output pipe, a first hydraulic signal output port, a second hydraulic signal output port, a first liquid flow pipe and a second liquid flow pipe, which are respectively communicated with the liquid flow input port, the liquid flow output port, the first control oil, the second control oil port, the first liquid flow port and the second liquid flow port of the hydraulic control reversing valve in one-to-one correspondence. According to the hydraulic control reversing valve, the front hydraulic pump supplies oil to the travelling mechanism and the auxiliary equipment in turn, the front hydraulic pump is released in an idle period, the front hydraulic pump is used efficiently, and the market demand is met.
Description
Technical Field
The invention relates to refitting of an excavator, in particular to a hydraulic distributor for refitting of the excavator.
Background
With the continuous development of engineering machinery, people can add a plurality of accessory equipment on the excavator to enable the excavator to have multiple functions so as to form special equipment.
The existing excavator adopts a double oil supply structure of front and rear hydraulic pumps, wherein the front hydraulic pump mainly supplies oil to a bucket rod, a rotary arm, a left walking arm and a movable arm, and the rear hydraulic pump mainly supplies oil to a bucket, the movable arm and a right walking arm. The excavator is also equipped with a pilot pump, the main function of which is the variable for the hydraulic pump and the valve stem used as a pilot oil opening distribution valve.
The oil supply of the front hydraulic pump and the rear hydraulic pump is carried out by an original distributor of the excavator, the original distributor comprises a front distribution module and a rear distribution module, wherein the front distribution module is provided with necessary high-pressure oil way output ports such as a bucket rod, a rotary, a left walking and a movable arm, and the like, and no standby output port exists; the rear distribution module is provided with a first standby output port and a second standby output port besides necessary output ports such as a bucket, a movable arm and right walking; therefore, the left output port of the front distribution module can provide hydraulic pressure for the traveling mechanism only when traveling in idle time, which is equivalent to idle at ordinary times, has low utilization rate and serious resource waste; on the other hand, the rear hydraulic pump has only two standby output ports, can only provide hydraulic pressure for a small number of auxiliary equipment with small flow, cannot meet the hydraulic pressure requirement of the large-flow auxiliary equipment, and has large limit of refittable auxiliary equipment.
Disclosure of Invention
The invention aims to overcome the defects and provide the hydraulic distributor for improving the hydraulic utilization rate of the excavator and increasing the hydraulic ports.
In order to achieve the above object, the technical solution of the present invention is: a hydraulic distributor is used for refitting a hydraulic system of an excavator and comprises a distributor body and a hydraulic control reversing valve arranged on the distributor body.
The distributor body comprises a first pilot oil input port, a second pilot oil input port, a pilot oil return output port, a liquid flow input pipe, a liquid flow output pipe, a first liquid flow pipe, a second liquid flow pipe, a first hydraulic signal output port, a second hydraulic signal output port, a third hydraulic signal output port, a first runner, a second runner and a third runner; the first pilot oil input port is communicated to the first hydraulic signal output port through a first flow channel; the second pilot oil input port is communicated to the second hydraulic signal output port through a second flow passage; a third flow passage is connected between the first flow passage and the second flow passage; the third flow passage is composed of a front section, a rear section and a middle section, a steel ball horizontally displaces in the middle section, conical surface flaring is arranged at the connecting end parts of the front section, the rear section and the middle section, and the surface of the steel ball is jointed with the conical surface flaring to realize sealing; the middle part of the middle section is communicated with a third hydraulic signal output port; the pilot oil return device also comprises a runner for guiding the pilot oil return to the pilot oil return outlet.
The hydraulically controlled reversing valve includes: the device comprises a first control oil port, a second control oil port, a liquid flow input port, a liquid flow output port, a first liquid flow port and a second liquid flow port; when the control oil is input from the first control oil port, the liquid flow input port is communicated with the first liquid flow port; when the control oil is input from the second control oil port, the liquid flow input port is communicated with the second liquid flow port; when no control oil is input, the liquid flow inlet, the first liquid flow port and the second liquid flow port are respectively communicated with the liquid flow outlet.
One end of the liquid flow input pipe is communicated with the liquid flow input port, one end of the liquid flow output pipe is communicated with the liquid flow output port, the first hydraulic signal output port is communicated with the first control oil port, and the second hydraulic signal output port is communicated with the second control oil port; the first liquid flow port is communicated with one end of the first liquid flow pipe, and the second liquid flow port is communicated with one end of the second liquid flow pipe.
The first pilot oil input port is used for communicating with a pilot pump of the excavator, and the second pilot oil input port is used for communicating with one left traveling hydraulic signal output port of the front distribution module; the pilot oil return outlet is communicated with a pilot oil recovery station of the excavator; the other end of the liquid flow input pipe is communicated with a left walking output port of the front distribution module; the other end of the liquid flow output pipe is communicated with a hydraulic recovery station of the excavator; the third hydraulic signal output port is communicated with a left walking master control valve of the front distribution module; the first liquid flow pipe supplies oil for auxiliary equipment, and the second liquid flow pipe supplies oil for the left travelling mechanism.
Preferably, the first liquid flow pipe is led out of a first branch flow passage communicated with the liquid flow output pipe, and the first branch flow passage is sequentially provided with a first hydraulic sensor and a first overflow valve.
Preferably, the device also comprises a first electromagnetic valve, a second branch flow passage and a third branch flow passage which are arranged in parallel; the upper parts of the two electromagnetic valves are communicated with the second branch flow passage, and the middle parts of the two electromagnetic valves are communicated with the third branch flow passage; the first pilot oil input port is communicated with the middle part of the second branch flow passage, and the pilot oil return output port is communicated with the middle part of the third branch flow passage; the first runner is connected with the lower part of the first electromagnetic valve, and the second runner is connected with the lower part of the second electromagnetic valve.
When the first electromagnetic valve is electrified, the upper part of the first electromagnetic valve is communicated with the lower part of the first electromagnetic valve, and the pilot oil enters the upper part of the first electromagnetic valve from the second branch flow passage and flows to the first flow passage from the lower part of the first electromagnetic valve; when the pilot oil returns, the lower part of the first electromagnetic valve is communicated with the middle part of the first electromagnetic valve, the pilot oil returns from the first flow channel to the lower part of the first electromagnetic valve, and then flows from the middle part of the first electromagnetic valve to the pilot oil return outlet along the third branch flow channel.
When the second electromagnetic valve is electrified, the upper part of the second electromagnetic valve is communicated with the bottom end of the second electromagnetic valve, and a first standby hydraulic signal port is arranged below the second electromagnetic valve; and when the pilot oil returns, the bottom end of the second electromagnetic valve is led to the middle part of the second electromagnetic valve, the pilot oil returns enters the lower part of the second electromagnetic valve from the lower part of the second flow passage or the second electromagnetic valve, and then flows to the pilot oil return output port from the middle part of the second electromagnetic valve along the third branch flow passage.
The first standby hydraulic signal port provides a hydraulic signal for a master control valve of a first standby output port of the rear distribution module.
Preferably, the device further comprises a third electromagnetic valve, wherein the upper part of the third electromagnetic valve is positioned at the middle part of the second branch flow passage and does not partition the second branch flow passage, and the middle part of the third electromagnetic valve is positioned at the third branch flow passage and does not partition the third branch flow passage.
When the third electromagnetic valve is electrified, the upper part of the third electromagnetic valve is communicated with the bottom end of the third electromagnetic valve, and a second standby hydraulic output port is arranged below the third electromagnetic valve; and when the pilot oil returns, the bottom end of the third electromagnetic valve is communicated with the middle part of the third electromagnetic valve, the pilot oil returns from the bottom end of the third electromagnetic valve to the lower part of the third electromagnetic valve, and then flows from the middle part of the third electromagnetic valve to the pilot oil return output port along the third branch flow passage.
Preferably, the dispenser body further comprises a third liquid flow pipe and a fourth liquid flow pipe; one end of the third liquid flow pipe is communicated with the first standby output port, and the other end of the third liquid flow pipe directly supplies oil to the auxiliary equipment or is converged with the first liquid flow pipe to supply oil to the auxiliary equipment; the middle part of the third liquid flow pipe is communicated with a first standby hydraulic return port through a fourth liquid flow pipe, the first standby hydraulic return port is communicated with a hydraulic recovery station, and a second pressure sensor and a second overflow valve are arranged at the middle part of the fourth liquid flow pipe.
Preferably, the distributor body is provided with two adjusting devices for adjusting the pressure of the first flow channel and the second flow channel respectively, the adjusting devices comprise bolts with tops extending into the first flow channel or the second flow channel, blind nuts are fixed at the tops of the bolts, and adjusting nuts are sleeved between the blind nuts and the distributor body.
By adopting the technical scheme, the invention has the beneficial effects that:
1. The hydraulic control reversing valve is used for realizing switching oil supply of the front hydraulic pump for the travelling mechanism and the auxiliary equipment, releasing the idle period of the front hydraulic pump for supplying oil for the auxiliary equipment, realizing efficient use of the front hydraulic pump, meeting the refitting of multiple auxiliary equipment of the excavator and meeting the market demand.
2. The hydraulic power of the first liquid flow pipe of the hydraulic distributor and the hydraulic power of the first standby output port of the rear distribution module are not related to each other, the hydraulic power can be independently supplied to respective auxiliary equipment, and the hydraulic power can be combined to supply the oil to the large-flow auxiliary equipment, so that the power can be improved by more than 40%.
3. The control of the pilot oil of the rear hydraulic pump is integrated in the invention, which is beneficial to simplifying the connection of the hydraulic system of the excavator.
4. The invention drains the branch flow passage from each oil supply port of the accessory equipment, and installs the pressure sensor and the overflow valve on the corresponding branch flow passage, thereby realizing the restriction of the pressure of the hydraulic oil passage and protecting the whole system from damage.
Drawings
FIG. 1 is a right upper perspective view of the present invention;
FIG. 2 is a bottom view of the present invention;
FIG. 3 is a top view of the dispenser body;
FIG. 4 is a bottom view of the dispenser body;
FIG. 5 is a right side view of the distributor body C side, with arrows indicating the direction of movement of the pilot oil to maintain hydraulic pressure and pilot return;
in the right side view of the distributor body C of FIG. 6, the arrow is the direction of the motion of the pilot oil when the solenoid valve is operated;
FIG. 7 is a front view of the dispenser body;
FIG. 8 is a bottom view of the pilot operated directional valve;
FIG. 9 is a schematic view of a pressure regulating device;
The main reference numerals illustrate: 1. a dispenser body; 101. a first pilot oil input port; 102. a second pilot oil input port; 103. a pilot oil return outlet; 104. a first hydraulic signal output port; 105. a second hydraulic signal output port; 106. a third hydraulic signal output port; 107. a first backup hydraulic return port; 108. a first liquid flow tube; 109. a second liquid flow tube; 110. a third liquid flow tube; 111. a fourth liquid flow tube; 112. a first flow passage; 113. a second flow passage; 114. a third flow passage; 116. a first branch flow passage; 117. a second branch flow passage; 118. a third branch flow passage; 119. a liquid flow input tube; 120. a liquid flow output pipe; 121. a first backup hydraulic signal port; 122. a second backup hydraulic signal port; 2. a hydraulically controlled reversing valve; x, a first oil control port; y, a second oil control port; p, a liquid flow inlet; t, a liquid flow outlet; A. a first fluid port; B. a second fluid port; 31. a first electromagnetic valve; 32. a second electromagnetic valve; 33. a third electromagnetic valve; 34. a first pressure sensor; 35. a second pressure sensor; 36. a first overflow valve; 37. a second overflow valve; 38. steel balls; 7. an adjusting device; 71. a bolt; 72. a blind nut; 73. and adjusting the nut.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
It should be noted that directional terms mentioned in the present invention, such as: upper, lower, front, rear, left, right, top, bottom, inner, outer, etc. (except for the front hydraulic pump and the rear hydraulic pump) are based on the orientation or positional relationship shown in the drawings for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
The filling portions in fig. 3-6 are left through holes for processing, have no substantial function, and thus are plugged with plugs. In addition, the electromagnetic valves (31, 32, 33) and the pilot operated directional control valve mentioned in the present invention are not limited to the types and the like as long as the functions according to the present invention can be realized.
As shown in fig. 1, a hydraulic distributor is used for refitting a hydraulic system of an excavator, and comprises a distributor body 1 and a hydraulic control reversing valve 2, wherein the hydraulic control reversing valve 2 is directly fixed above the distributor body 1 through bolts.
As shown in fig. 2-7, the distributor body 1 includes a first pilot oil input port 101, a second pilot oil input port 102, a pilot oil return output port 103, a fluid input pipe 119, a fluid output pipe 120, a first fluid flow pipe 108, a second fluid flow pipe 109, a first hydraulic signal output port 104, a second hydraulic signal output port 105, a third hydraulic signal output port 106, a first fluid passage 112, a second fluid passage 113, and a third fluid passage 114.
The first pilot oil input port 101 is connected to the first hydraulic signal output port 104 via a first flow passage 112, and the first flow passage 112 is opened in the opposite direction to the pilot oil return output port 103 via a corresponding flow passage. The second pilot oil input port 102 is connected to the second hydraulic signal output port 105 via a second flow passage 113, and the second flow passage 113 is opened in the opposite direction to the pilot oil return output port 103 via a corresponding flow passage.
A third flow passage 114 is connected between the first flow passage 112 and the second flow passage 113. The third flow channel 114 is formed by a front section, a rear section and a middle section, a steel ball 38 horizontally displaces in the middle section, the diameters of the front section and the rear section are larger than those of the middle section, conical surface flares are arranged at the ends of the front section, the rear section and the middle section, the surfaces of the steel balls 38 are jointed with the conical surface flares to realize sealing, and in addition, a third hydraulic signal output port 106 is led out from the middle part of the middle section (the middle part of the middle section is communicated with the third hydraulic signal output port 106).
As shown in fig. 8, the pilot operated directional control valve 2 has a first control port X, a second control port Y, a fluid flow inlet P, a fluid flow outlet T, a first fluid flow port a, and a second fluid flow port B. The hydraulic control reversing valve 2 works specifically as follows: when the control oil is input from the first control oil port X, the liquid flow input port P is communicated with the first liquid flow port A; when the control oil is input from the second control oil port Y, the liquid flow input port P is communicated with the second liquid flow port B; when no control oil is input, the liquid flow input port P, the first liquid flow port A and the second liquid flow port B are respectively communicated with the liquid flow output port T.
When the pilot operated directional valve 2 is installed above the distributor body 1, the liquid flow input port P is located directly above the liquid flow input pipe 119 and is in sealing connection with a sealing ring and the like to realize communication between the two, the liquid flow output port T is located directly above the liquid flow output pipe 120 and is in sealing connection with a sealing ring and the like to realize communication between the two, the first oil control port X is located directly above the first hydraulic signal output port 104 and is in sealing connection with a sealing ring and the like to realize communication between the two, and the second oil control port Y is located directly above the second hydraulic signal output port 105 and is in sealing connection with a sealing ring and the like to realize communication between the two. The first fluid port a is located just above the first fluid flow tube 108 and is connected in a sealing manner by a sealing ring or the like to realize communication between the two. The second fluid port B is located just above the second fluid flow tube 109 and is connected by sealing with a seal ring or the like to achieve communication between the two. The bottom ends of the first hydraulic signal output port 104 and the second hydraulic signal output port 105 are sealed by bolts, sealing rings and the like.
The first pilot oil input port 101 is for communication with a pilot pump of the excavator, and the second pilot oil input port 102 is for communication with one left travel hydraulic signal output port of the front distribution module. The pilot oil return outlet 103 communicates with a pilot oil recovery station of the excavator. The fluid flow inlet 119 communicates with a left hand travel outlet of the front dispensing module. The flow outlet conduit 120 communicates with the hydraulic recovery station of the excavator. The third hydraulic signal output port 106 is communicated with a left walking master control valve of the front distribution module, i.e. provides a hydraulic signal for the left walking master control valve of the front distribution module. The first liquid flow pipe 108 supplies oil for auxiliary equipment, and the second liquid flow pipe 109 supplies oil for the travelling mechanism.
The specific working procedure is as follows: after the pilot oil enters from the first pilot oil input port 101, a part of the pilot oil flows through the first hydraulic signal output port 104 along the first flow passage 112, and finally enters the pilot control reversing valve 2 from the first control oil port X, so that a passage from the liquid flow input port P to the first liquid flow port A is opened; the other part enters the middle part of the third flow passage 114, the steel ball 38 is pushed to the conical surface flaring of the front side sealing front side, and the pilot oil flows from the middle part to the third hydraulic signal output port 106 and reaches the left walking main control valve of the front distribution module, so that the left walking main control valve of the front distribution module is opened. The high-pressure oil of the front hydraulic pump enters the hydraulic control reversing valve 2 through the liquid flow input pipe 119 to be reversed, and is output through the first liquid flow pipe 108, so that the excavator is supplied with oil for auxiliary equipment.
After the pilot oil enters from the second pilot oil input port 102, a part of the pilot oil flows through the second hydraulic signal output port 105 along the second flow passage 113, and finally enters the pilot control reversing valve 2 from the second control oil port Y, so that a passage from the liquid flow input port P to the second liquid flow port B is opened; the other part enters the middle part of the third flow passage 114, the steel balls 38 are pushed to the conical surface flaring before and after the rear side sealing, and the pilot oil flows from the middle part to the third hydraulic signal output port 106 and reaches a left walking main control valve of the front distribution module, so that the left walking main control valve of the front distribution module is opened. The high-pressure oil of the front hydraulic pump enters the hydraulic control reversing valve 2 through the liquid flow input pipe 119 to be reversed, and is output through the second liquid flow pipe 109, so that the travelling mechanism supplies oil. To further illustrate the oil supply to the left running gear, for example, the second liquid flow pipe 109 outputs to the front chamber of the left running gear, and the high-pressure oil flows back to the front distribution module from the rear chamber of the left running gear; the front sub-module directly supplies oil to the rear chamber of the left travelling mechanism, high-pressure oil flows back to the second liquid flow pipe 109 from the front chamber of the left travelling mechanism, the second liquid flow pipe 109 is recovered to the hydraulic recovery station of the excavator by the liquid flow output pipe 120, and then the high-pressure oil returns to the front distribution module.
When no control oil is input into the hydraulic control reversing valve 2, high-pressure oil returns to the hydraulic control reversing valve 2 through the first liquid flow pipe 108 and the second liquid flow pipe 109, and is recycled to the hydraulic recovery station through the liquid flow output port T and the liquid flow output pipe 120. The pilot oil returns to the first flow passage 112 and the second flow passage 113 respectively, enters the corresponding flow passages, and is recovered to a pilot oil recovery station of the excavator through the pilot oil return outlet 103.
In a possible embodiment, the first fluid flow pipe 108 further leads out a first branch flow channel 116, the first branch flow channel 116 is communicated to the middle part of the fluid flow output pipe 120, and the middle part of the first branch flow channel 116 is sequentially provided with the first pressure sensor 34 and the first overflow valve 36, so as to realize the detection of the pressure of the oil path and protect the whole system from being damaged. That is, the first pressure sensor 34 detects the oil passage pressure, and when the pressure exceeds the threshold value, the first relief valve 36 opens, and the first branch flow passage 116 is opened. The second fluid flow pipe 109 does not need to be connected with a pressure sensor and an overflow valve, mainly because the self-contained pressure detection and overflow device is arranged in the oil supply system of the travelling mechanism of the excavator.
In another possible embodiment, as shown in fig. 5 and 6, the dispenser body 1 includes a first solenoid valve 31, a second solenoid valve 32, and a second branch flow passage 117 and a third branch flow passage 118 arranged in parallel. The upper parts of the two electromagnetic valves (31, 32) are communicated with the second branch flow passage 117, and the middle parts of the two electromagnetic valves (31, 32) are communicated with the third branch flow passage 118. The first pilot oil input port 101 is connected to the middle portion of the second branch flow passage 117, and the pilot oil return output port 103 is connected to the third branch flow passage middle portion 118. The first flow passage 112 is connected to the lower portion of the first solenoid valve 31, and the second flow passage 113 is connected to the lower portion of the second solenoid valve 32.
For convenience of control, a third solenoid valve 33 may be further installed between the first solenoid valve 31 and the second solenoid valve 32. The upper part of the third electromagnetic valve 33 is positioned in the middle of the second branch flow passage 117 and does not block the second branch flow passage 117, and the middle part of the third electromagnetic valve 33 is positioned in the third branch flow passage 118 and does not block the third branch flow passage 118.
The three solenoid valves (31, 32, 33) do not separate the second branch flow passage 117 from the third branch flow passage 118 in any case. The first pilot oil input port 101 maintains an oil supply state, and the pilot oil flows to both sides in the second branch flow passage 117 without obstruction to maintain a preset hydraulic pressure. While the pilot return oil entering the third branch flow passage 118 flows to the pilot return oil outlet 103 in the middle without being blocked.
When the first solenoid valve 31 is energized, the upper portion of the first solenoid valve 31 opens to the lower portion of the second solenoid valve 32. At this time, the pilot oil enters the upper portion of first solenoid valve 31 from second branch passage 117, and flows into first passage 112 from the lower portion of first solenoid valve 31. During pilot oil return recovery, the lower part of the first electromagnetic valve 31 is led to the middle part of the first electromagnetic valve 31, pilot oil return enters the lower part of the first electromagnetic valve 31 from the first flow passage 112, and then flows to the pilot oil return output port 103 from the middle part of the first electromagnetic valve 31 along the third branch flow passage 118.
A first backup hydraulic signal port 121 is provided below the second solenoid valve 32. When the second solenoid valve 32 is energized, the upper portion of the second solenoid valve 32 opens to the bottom end of the second solenoid valve 32, thereby forming a first standby hydraulic signal that is provided to the master valve of the first standby output port of the rear distribution module. When the pilot oil returns, the bottom end of the second electromagnetic valve 32 is led to the middle part of the second electromagnetic valve 32, the pilot oil returns from the lower part of the second electromagnetic valve 32 or the second flow passage 113, and then flows from the middle part of the second electromagnetic valve 32 to the pilot oil return output port 103 along the third branch flow passage 118.
A second backup hydraulic signal port 122 is provided below the third solenoid valve 33. When the third electromagnetic valve 33 is electrified, the upper part of the third electromagnetic valve 33 is led to the bottom end of the third electromagnetic valve 33, so that a second standby hydraulic signal is formed, and the hydraulic signal is provided for the main control valve of the second standby output port of the rear distribution module. During pilot oil return recovery, the bottom end of the third electromagnetic valve 33 is led to the middle part of the second electromagnetic valve 32, pilot oil return enters the lower part of the third electromagnetic valve 33 from the lower part of the third electromagnetic valve 33, and then flows to the pilot oil return output port 103 along the third branch flow passage 118 from the middle part of the second electromagnetic valve 32.
In this embodiment, a first standby outlet is also introduced into the dispenser body 1. Specifically, the dispenser body 1 includes a third liquid flow pipe 110 and a fourth liquid flow pipe 111. One end of the third liquid flow pipe 110 is communicated with the first standby output port, and the other end supplies oil to the auxiliary equipment. The middle part of the third liquid flow pipe 110 is communicated with the first standby hydraulic return port 107 through the fourth liquid flow pipe 111, and the first standby hydraulic return port 107 is communicated with a hydraulic recovery station. Meanwhile, a second pressure sensor 35 and a second relief valve 37 are installed in the middle of the fourth fluid flow pipe 111, for detecting the fluid pressure of the fluid path and performing effective control to protect the fluid path system from damage. The second pressure sensor 35 detects the oil passage pressure, and when the pressure exceeds the threshold value, the second relief valve 37 opens, and the fourth fluid flow pipe 111 is opened.
When the excavator is refitted and needs to adopt the large-flow auxiliary equipment, the output high-pressure oil of the first liquid flow pipe 108 and the output high-pressure oil of the third liquid flow pipe 110 can be combined and output through the converging device, so that the hydraulic power is improved, the lifting of the hydraulic power is more than 40%, and the actual market demands are met.
Further, the first flow passage 112 and the second flow passage 113 are both provided with the adjusting device 7. As shown in fig. 9, the adjusting device 7 includes a bolt 71 having a tip end extending into the first flow passage 112 or the second flow passage 113, a blind nut 72 is fixed to the top of the bolt 71, and an adjusting nut 73 is fitted between the blind nut 72 and the dispenser body 1 to the bolt 71. The adjusting nut 53 is rotated to adjust the extending depth of the bolt 71, thereby achieving the purposes of blocking and adjusting the pressure of the hydraulic signal and improving the flexibility of use.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.
Claims (4)
1. A hydraulic dispenser, characterized by: the hydraulic system refitted for the excavator comprises a distributor body and a hydraulic control reversing valve arranged on the distributor body;
The dispenser body includes: the hydraulic control system comprises a first pilot oil input port, a second pilot oil input port, a pilot oil return output port, a liquid flow input pipe, a liquid flow output pipe, a first liquid flow pipe, a second liquid flow pipe, a first hydraulic signal output port, a second hydraulic signal output port, a third hydraulic signal output port, a first runner, a second runner and a third runner; the first pilot oil input port is communicated to the first hydraulic signal output port through a first flow channel; the second pilot oil input port is communicated to the second hydraulic signal output port through a second flow passage; a third flow passage is connected between the first flow passage and the second flow passage; the third flow passage is composed of a front section, a rear section and a middle section, a steel ball horizontally displaces in the middle section, conical surface flaring is arranged at the connecting end parts of the front section, the rear section and the middle section, and the surface of the steel ball is jointed with the conical surface flaring to realize sealing; the middle part of the middle section is communicated with a third hydraulic signal output port; the flow passage is used for guiding the pilot oil return to the pilot oil return output port;
The hydraulically controlled reversing valve includes: the device comprises a first control oil port, a second control oil port, a liquid flow input port, a liquid flow output port, a first liquid flow port and a second liquid flow port; when the control oil is input from the first control oil port, the liquid flow input port is communicated with the first liquid flow port; when the control oil is input from the second control oil port, the liquid flow input port is communicated with the second liquid flow port; when no control oil is input, the liquid flow inlet, the first liquid flow port and the second liquid flow port are respectively communicated with the liquid flow outlet;
one end of the liquid flow input pipe is communicated with the liquid flow input port, one end of the liquid flow output pipe is communicated with the liquid flow output port, the first hydraulic signal output port is communicated with the first control oil port, and the second hydraulic signal output port is communicated with the second control oil port;
the first liquid flow port is communicated with one end of the first liquid flow pipe, and the second liquid flow port is communicated with one end of the second liquid flow pipe; the first pilot oil input port is used for communicating with a pilot pump of the excavator, and the second pilot oil input port is used for communicating with one left traveling hydraulic signal output port of the front distribution module; the pilot oil return outlet is communicated with a pilot oil recovery station of the excavator; the other end of the liquid flow input pipe is communicated with a left walking output port of the front distribution module; the other end of the liquid flow output pipe is communicated with a hydraulic recovery station of the excavator; the third hydraulic signal output port is communicated with a left walking master control valve of the front distribution module; the first liquid flow pipe supplies oil for auxiliary equipment, and the second liquid flow pipe supplies oil for the left travelling mechanism;
The device also comprises a first electromagnetic valve, a second branch flow passage and a third branch flow passage which are arranged in parallel; the upper parts of the two electromagnetic valves are communicated with the second branch flow passage, and the middle parts of the two electromagnetic valves are communicated with the third branch flow passage; the first pilot oil input port is communicated with the middle part of the second branch flow passage, and the pilot oil return output port is communicated with the middle part of the third branch flow passage; the first runner is connected with the lower part of the first electromagnetic valve, and the second runner is connected with the lower part of the second electromagnetic valve;
When the first electromagnetic valve is electrified, the upper part of the first electromagnetic valve is communicated with the lower part of the first electromagnetic valve, and the pilot oil enters the upper part of the first electromagnetic valve from the second branch flow passage and flows to the first flow passage from the lower part of the first electromagnetic valve; when the pilot oil returns, the lower part of the first electromagnetic valve is communicated with the middle part of the first electromagnetic valve, the pilot oil returns from the first flow channel to the lower part of the first electromagnetic valve, and then flows from the middle part of the first electromagnetic valve to the pilot oil return outlet along the third branch flow channel;
When the second electromagnetic valve is electrified, the upper part of the second electromagnetic valve is communicated with the bottom end of the second electromagnetic valve, and a first standby hydraulic signal port is arranged below the second electromagnetic valve; when the pilot oil returns, the bottom end of the second electromagnetic valve is led to the middle part of the second electromagnetic valve, the pilot oil returns enters the lower part of the second electromagnetic valve from the lower part of the second flow passage or the second electromagnetic valve, and then flows to the pilot oil return output port from the middle part of the second electromagnetic valve along the third branch flow passage;
The first standby hydraulic signal port is used for providing a hydraulic signal for a main control valve of a first standby output port of the rear distribution module;
the first branch flow channel is led out from the first liquid flow pipe and is communicated with the liquid flow output pipe, and the first branch flow channel is sequentially provided with a first hydraulic sensor and a first overflow valve.
2. The hydraulic distributor according to claim 1, wherein: the third electromagnetic valve is positioned at the upper part of the third electromagnetic valve, is positioned at the middle part of the second branch flow passage and does not partition the second branch flow passage, and the middle part of the third electromagnetic valve is positioned at the third branch flow passage and does not partition the third branch flow passage;
When the third electromagnetic valve is electrified, the upper part of the third electromagnetic valve is communicated with the bottom end of the third electromagnetic valve, and a second standby hydraulic output port is arranged below the third electromagnetic valve; and when the pilot oil returns, the bottom end of the third electromagnetic valve is communicated with the middle part of the third electromagnetic valve, the pilot oil returns from the bottom end of the third electromagnetic valve to the lower part of the third electromagnetic valve, and then flows from the middle part of the third electromagnetic valve to the pilot oil return output port along the third branch flow passage.
3. The hydraulic distributor according to claim 1, wherein: the distributor body also comprises a third liquid flow pipe and a fourth liquid flow pipe; one end of the third liquid flow pipe is communicated with the first standby output port, and the other end of the third liquid flow pipe directly supplies oil to the auxiliary equipment or is converged with the first liquid flow pipe to supply oil to the auxiliary equipment; the middle part of the third liquid flow pipe is communicated with a first standby hydraulic return port through a fourth liquid flow pipe, the first standby hydraulic return port is communicated with a hydraulic recovery station, and a second pressure sensor and a second overflow valve are arranged at the middle part of the fourth liquid flow pipe.
4. The hydraulic distributor according to claim 1, wherein: the distributor body is provided with two adjusting devices for adjusting the pressure of the first flow channel and the second flow channel respectively, the adjusting devices comprise bolts, the top ends of the bolts extend into the first flow channel or the second flow channel, blind nuts are fixed at the tops of the bolts, and adjusting nuts are sleeved between the blind nuts and the distributor body.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110748521B (en) * | 2019-10-29 | 2021-06-04 | 大连泰凯工业有限公司 | Controllable high-pressure oil way distribution module |
| CN112576568B (en) * | 2020-12-16 | 2025-03-14 | 中国海洋石油集团有限公司 | A hydraulic valve block of an underwater control module and its supporting device |
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