CN110206794B - Hydraulic wrench and engineering vehicle - Google Patents
Hydraulic wrench and engineering vehicle Download PDFInfo
- Publication number
- CN110206794B CN110206794B CN201910547930.1A CN201910547930A CN110206794B CN 110206794 B CN110206794 B CN 110206794B CN 201910547930 A CN201910547930 A CN 201910547930A CN 110206794 B CN110206794 B CN 110206794B
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- Prior art keywords
- hydraulic
- oil
- oil port
- valve
- wrench
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
Abstract
The invention provides a hydraulic wrench and an engineering vehicle, and relates to the technical field of hydraulic equipment, wherein the hydraulic wrench comprises an oil pump, a hydraulic motor, a pump station and a hydraulic torque wrench; the oil pump hydraulic motor pump station with hydraulic torque spanner connects gradually, just the oil pump is by low-pressure direct current drive. The hydraulic wrench has the advantages that the hydraulic motor is adopted to drive the pump station, the motor on the pump station is omitted, the hydraulic wrench is suitable for special occasions where high voltage electricity cannot be used or no high voltage electricity is available, the application range of the hydraulic wrench is greatly widened, a high-cost pressurizing cylinder or ultra-high pressure pump technical route is not needed, an ordinary medium-low pressure oil pump is adopted to provide an oil source, the cost is lower, the operation is safer, and the hydraulic wrench is easier to implement.
Description
Technical Field
The invention relates to the technical field of hydraulic equipment, in particular to a hydraulic wrench and an engineering vehicle with the hydraulic wrench.
Background
When the engineering vehicle overhauls equipment, need use hydraulic wrench to unscrew and screw up the bolt. In some special occasions, for safety, a 220V or 380V high-voltage power supply cannot be used when equipment is overhauled, and only low-voltage direct current of 24V or below can be used.
The maximum pressure can reach 70MPa when the hydraulic wrench is operated, and the hydraulic wrench belongs to ultrahigh pressure equipment and needs to be driven by a motor. However, the motor needs a high-voltage power supply of 220V or 380V for driving, and the hydraulic wrench is difficult to drive by low-voltage direct current of 24V or below.
In order to solve the problems, when the hydraulic wrench is used in a special occasion of low-voltage direct current, a pressure cylinder or an ultrahigh pressure pump is generally adopted to directly drive the hydraulic wrench in the prior art, but the implementation difficulty is high and the cost is high.
Disclosure of Invention
The invention aims to provide a hydraulic wrench, which aims to solve the technical problems of high implementation difficulty and high cost when the hydraulic wrench in the prior art is used in a low-voltage current occasion.
The invention provides a hydraulic wrench, which comprises an oil pump, a hydraulic motor, a pump station and a hydraulic torque wrench;
the oil pump hydraulic motor pump station with hydraulic torque spanner connects gradually, just the oil pump is by low-pressure direct current drive.
Further, the oil pump is connected with the hydraulic motor through a quick connector.
Further, the hydraulic wrench also comprises a first hydraulic control reversing valve, a second hydraulic control reversing valve and a first electromagnetic reversing valve;
the pump station is connected with the first cavity of the hydraulic torque wrench through a first hydraulic control reversing valve; the pump station is connected with a second cavity of the hydraulic torque wrench through a second hydraulic control reversing valve;
the first electromagnetic reversing valve is driven by low-voltage direct current and is used for driving the first hydraulic control reversing valve and the second hydraulic control reversing valve to reverse.
Further, the first hydraulic control reversing valve comprises a first oil port, a second oil port, a third oil port and a first reversing oil port; the second hydraulic control reversing valve comprises a fourth oil port, a fifth oil port, a sixth oil port and a second reversing oil port; the first electromagnetic directional valve comprises a seventh oil port, an eighth oil port and a ninth oil port;
an outlet of the pump station is respectively connected with a first oil port, a fourth oil port and an eighth oil port, the second oil port is connected with a first cavity of the hydraulic torque wrench, and the fifth oil port is connected with a second cavity of the hydraulic torque wrench;
the hydraulic wrench further comprises an oil tank, the oil tank is connected with an inlet of the pump station, the third oil port, the sixth oil port and the seventh oil port are respectively connected with the oil tank, and the third oil port, the sixth oil port and the seventh oil port are communicated with each other;
the first reversing oil port is connected with the ninth oil port, and the second reversing oil port is connected with the second oil port.
Furthermore, one-way valves are arranged between the first hydraulic control reversing valve and the pump station, and between the second hydraulic control reversing valve and the pump station.
Furthermore, a first overflow valve is arranged between the one-way valve and the pump station, and a second overflow valve is arranged between the second hydraulic control reversing valve and the hydraulic torque wrench.
The invention also aims to provide an engineering vehicle comprising the hydraulic wrench.
Further, the engineering vehicle further comprises a second electromagnetic directional valve and a third electromagnetic directional valve, and the second electromagnetic directional valve and the third electromagnetic directional valve are both driven by low-voltage direct current;
the oil pump, the second electromagnetic directional valve, the third electromagnetic directional valve and the hydraulic motor are sequentially connected, an oil outlet of the second electromagnetic directional valve is connected with the arm support, and an oil outlet of the third electromagnetic directional valve is connected with the supporting legs.
Further, a filter is arranged between the oil pump and the second electromagnetic directional valve.
Further, a third overflow valve is arranged between the filter and the second electromagnetic directional valve.
The invention provides a hydraulic wrench, which comprises an oil pump, a hydraulic motor, a pump station and a hydraulic torque wrench; the oil pump hydraulic motor pump station with hydraulic torque spanner connects gradually, just the oil pump is by low-pressure direct current drive. The hydraulic wrench has the advantages that the hydraulic motor is adopted to drive the pump station, the motor on the pump station is omitted, the hydraulic wrench is suitable for special occasions where high voltage electricity cannot be used or no high voltage electricity is available, the application range of the hydraulic wrench is greatly widened, a high-cost pressurizing cylinder or ultra-high pressure pump technical route is not needed, an ordinary medium-low pressure oil pump is adopted to provide an oil source, the cost is lower, the operation is safer, and the hydraulic wrench is easier to implement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a hydraulic wrench according to an embodiment of the present invention;
fig. 2 is a partial schematic view of fig. 1.
Icon: 1-an oil pump; 2-a hydraulic motor; 3, a pump station; 4-hydraulic torque wrench; 5-a quick coupling; 6-a first hydraulic control directional control valve; 61-a first oil port; 62-a second oil port; 63-a third oil port; 64-a first reversing oil port; 7-a second hydraulic control reversing valve; 71-a second reversing oil port; 72-fifth oil port; 73-a sixth oil port; 74-a fourth oil port; 8-a first electromagnetic directional valve; 81-seventh oil port; 82-an eighth oil port; 83-ninth oil port; 9-a one-way valve; 10-a first overflow valve; 11-a second overflow valve; 12-a second electromagnetic directional valve; 121-a first oil inlet; 122-a first oil outlet; 123-a first oil return port; 124-a first working oil port; 13-a third electromagnetic directional valve; 131-a second oil inlet; 132-a second oil outlet; 133-a second oil return port; 134-a second working oil port; 14-a filter; 15-third relief valve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, as may be used herein, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a hydraulic wrench and an engineering vehicle, and a plurality of embodiments are provided below to describe the hydraulic wrench and the engineering vehicle provided by the invention in detail.
Example 1
The hydraulic wrench provided by the embodiment, as shown in fig. 1 to 2, includes an oil pump 1, a hydraulic motor 2, a pump station 3, and a hydraulic torque wrench 4; the oil pump 1, the hydraulic motor 2, the pump station 3 and the hydraulic torque wrench 4 are connected in sequence, and the oil pump 1 is driven by low-voltage direct current.
The hydraulic wrench is powered by a common medium-low pressure oil pump 1 to supply oil to a hydraulic system of the hydraulic wrench. The oil pump 1 supplies oil to the hydraulic motor 2, the hydraulic motor 2 drives the pump station 3, and the pump station 3 supplies high-pressure oil to the hydraulic torque wrench 4, so that the hydraulic torque wrench 4 is driven to screw or loosen a bolt, and the purpose of overhauling equipment is achieved.
The hydraulic wrench provided by the embodiment adopts the hydraulic motor 2 to drive the pump station 3, cancels the motor on the pump station 3, is suitable for special occasions where high voltage electricity or no high voltage electricity can not be used, greatly widens the application range of the hydraulic wrench, does not need to adopt a high-cost pressurizing cylinder or an ultrahigh pressure pump technical route, but adopts the common medium and low pressure oil pump 1 to provide an oil source, has lower cost and safer operation, and is easier to implement.
In the embodiment, the oil pump 1 is driven by low-voltage direct current of 24V, and the oil pump 1 may be driven by low-voltage direct current of any suitable voltage below 24V.
Further, the oil pump 1 is connected to the hydraulic motor 2 through a quick coupling 5. Specifically, through the tube coupling between oil pump 1 and the hydraulic motor 2, when the pipeline on oil pump 1 docks with the pipeline on the hydraulic motor 2, can utilize quick-operation joint 5 to connect, can improve the convenience and the efficiency of connecting.
Further, the hydraulic wrench also comprises a first hydraulic control reversing valve 6, a second hydraulic control reversing valve 7 and a first electromagnetic reversing valve 8; the pump station 3 is connected with a first cavity of the hydraulic torque wrench 4 through a first hydraulic control reversing valve 6; the pump station 3 is connected with a second cavity of the hydraulic torque wrench 4 through a second hydraulic control reversing valve 7; the first electromagnetic directional valve 8 is driven by low-voltage direct current, and the first electromagnetic directional valve 8 is used for driving the first hydraulic control directional valve 6 and the second hydraulic control directional valve 7 to change directions.
The first electromagnetic directional valve 8 can drive the first hydraulic control directional valve 6 and the second hydraulic control directional valve 7 to change directions, so that hydraulic oil flows into the first cavity or the second cavity of the hydraulic torque wrench 4. The first electromagnetic directional valve 8 is driven by low-voltage direct current, so that the hydraulic wrench can be applied to special occasions where high voltage electricity cannot be used or is not used.
For example, when the first hydraulic control reversing valve 6 and the second hydraulic control reversing valve 7 are located at the first working position (right position), the oil outlet of the pump station 3 is communicated with the first cavity of the hydraulic torque wrench 4 through the first hydraulic control reversing valve 6, the oil outlet of the pump station 3 is not communicated with the second cavity of the hydraulic torque wrench 4, and hydraulic oil can flow into the first cavity; under the control of the electromagnetic reversing valve, the first hydraulic control reversing valve 6 and the second hydraulic control reversing valve 7 are changed to a second working position (left position), the oil outlet of the pump station 3 is not communicated with the first cavity of the hydraulic torque wrench 4, the oil outlet of the pump station 3 is communicated with the second cavity of the hydraulic torque wrench 4 through the second hydraulic control reversing valve 7, hydraulic oil can flow into the second cavity, and therefore the bolt can be screwed or loosened.
Specifically, the first pilot-controlled directional control valve 6 includes a first oil port 61, a second oil port 62, a third oil port 63, and a first directional oil port 64; the second hydraulic control reversing valve 7 comprises a fourth oil port 74, a fifth oil port 72, a sixth oil port 73 and a second reversing oil port 71; the first electromagnetic directional valve 8 includes a seventh oil port 81, an eighth oil port 82, and a ninth oil port 83; an outlet of the pump station 3 is respectively connected with the first oil port 61, the fourth oil port 74 and the eighth oil port 82, the second oil port 62 is connected with the first cavity of the hydraulic torque wrench 4, and the fifth oil port 72 is connected with the second cavity of the hydraulic torque wrench 4; the hydraulic wrench further comprises an oil tank, the oil tank is connected with an inlet of the pump station 3, the third oil port 63, the sixth oil port 73 and the seventh oil port 81 are respectively connected with the oil tank, and the third oil port 63, the sixth oil port 73 and the seventh oil port 81 are communicated with each other; the first direction oil port 64 is connected to the ninth port 83, and the second direction oil port 71 is connected to the second port 62.
When a button on a handle of the hydraulic motor 2 is pressed, the controller controls the first electromagnetic directional valve 8 to be powered on, hydraulic oil flows into the hydraulic motor 2 from the oil pump 1, the hydraulic motor 2 drives the pump station 3, the pump station 3 pumps the hydraulic oil in the oil tank into the eighth oil port 82 at high pressure, because the eighth oil port 82 is not communicated with the ninth oil port 83 at the moment, the seventh oil port 81 is communicated with the ninth oil port 83, the pressure oil cannot flow into the first directional oil port 64, so that the first oil port 61 is communicated with the second oil port 62, the pressure oil flows out from the second oil port 62 after flowing into the first oil port 61, then one part of the pressure oil enters a first cavity of the hydraulic torque wrench 4, and the other part of the pressure oil flows into the second directional oil port 71, so that the fifth oil port 72 is communicated with the sixth oil port 73; the hydraulic oil in the second cavity flows out through the fifth oil port 72 and the sixth oil port 73 and flows back to the oil tank, at the moment, the pressure oil flows into the first cavity, the hydraulic oil in the second cavity flows back to the oil tank, the hydraulic wrench moves forward, and the bolt is screwed down.
When a button on a handle of the hydraulic motor 2 is released, the controller controls the first electromagnetic directional valve 8 to lose power, hydraulic oil flows into the hydraulic motor 2 from the oil pump 1, the hydraulic motor 2 drives the pump station 3, the pump station 3 pumps the hydraulic oil in the oil tank into the eighth oil port 82 at low pressure, since the eighth port 82 is now communicated with the ninth port 83, the pressure oil flows into the first direction changing port 64, the first hydraulic control reversing valve 6 is driven to reverse, so that the second oil port 62 is communicated with the third oil port 63, the hydraulic oil in the first cavity partially flows into the second oil port 62 and then flows back to the oil tank through the third oil port 63, and partially flows into the second reversing oil port 71 without pressure, therefore, the second hydraulic control directional control valve 7 works in the left position, the pressure oil flows into the second cavity through the fourth oil port 74 and the fifth oil port 72, the hydraulic oil in the first cavity flows back to the oil tank, the hydraulic wrench moves back, and the bolt is loosened.
The first electromagnetic directional valve 8 can be driven by 24V low-voltage direct current to work, and can also be driven by low-voltage direct current lower than 24V to work.
Furthermore, a one-way valve 9 is arranged between the first hydraulic control reversing valve 6 and the pump station 3 and between the second hydraulic control reversing valve 7 and the pump station 3, the one-way valve 9 limits pressure oil to flow to the first hydraulic control reversing valve 6 and the second hydraulic control reversing valve 7 only from the pump station 3, and hydraulic oil is prevented from flowing back to the outlet of the pump station 3.
Further, a first overflow valve 10 is arranged between the one-way valve 9 and the pump station 3, and a second overflow valve 11 is arranged between the second hydraulic control reversing valve 7 and the hydraulic torque wrench 4. The first overflow valve 10 and the second overflow valve 11 play a role in stabilizing the pressure of the hydraulic system, and the stability is improved.
The hydraulic wrench provided by the embodiment comprises an oil pump 1, a hydraulic motor 2, a pump station 3 and a hydraulic torque wrench 4; the oil pump 1, the hydraulic motor 2, the pump station 3 and the hydraulic torque wrench 4 are connected in sequence, and the oil pump 1 is driven by low-voltage direct current. The hydraulic motor 2 is adopted to drive the pump station 3, the motor on the pump station 3 is omitted, the hydraulic wrench is suitable for special occasions where high-voltage electricity cannot be used or no high-voltage electricity is available, the application range of the hydraulic wrench is greatly widened, a high-cost booster cylinder or ultra-high pressure pump technical route is not needed, an oil source is provided by the common medium-low pressure oil pump 1, the cost is lower, the operation is safer, and the implementation is easier.
Example 2
The engineering vehicle provided by the embodiment comprises the hydraulic wrench provided by the embodiment 1. The hydraulic motor 2 is adopted to drive the pump station 3, the motor on the pump station 3 is omitted, the hydraulic wrench is suitable for special occasions where high-voltage electricity cannot be used or no high-voltage electricity is available, the application range of the hydraulic wrench is greatly widened, a high-cost booster cylinder or ultra-high pressure pump technical route is not needed, an oil source is provided by the common medium-low pressure oil pump 1, the cost is lower, the operation is safer, and the implementation is easier.
Further, the engineering vehicle further comprises a second electromagnetic directional valve 12 and a third electromagnetic directional valve 13, and the second electromagnetic directional valve 12 and the third electromagnetic directional valve 13 are driven by low-voltage direct current; the oil pump 1, the second electromagnetic directional valve 12, the third electromagnetic directional valve 13 and the hydraulic motor 2 are sequentially connected, an oil outlet of the second electromagnetic directional valve 12 is connected with the arm support, and an oil outlet of the third electromagnetic directional valve 13 is connected with the supporting legs.
The second electromagnetic directional valve 12 includes a first oil inlet 121, a first oil outlet 122, a first oil return port 123 and a first working oil port 124, and the third electromagnetic directional valve 13 includes a second oil inlet 131, a second oil outlet 132, a second oil return port 133 and a second working oil port 134.
An outlet of the oil pump 1 is connected with a first oil inlet 121, a first working oil port 124 is connected with a second oil inlet 131, a first oil outlet 122 is connected with the arm support, a second oil outlet 132 is connected with the support leg, a second working oil port 134 is connected with an inlet of the hydraulic motor 2, and an outlet of the hydraulic motor 2 is connected with a first oil return port 123 and a second oil return port 133.
When a button on the motor handle is pressed or loosened, the first oil inlet 121 is communicated with the first working oil port 124, the first oil outlet 122 is communicated with the first oil return port 123, the second oil inlet 131 is communicated with the second working oil port 134, and the second oil return port 133 is communicated with the second oil outlet 132.
The oil pump 1 flows hydraulic oil into the hydraulic motor 2 through the first oil inlet 121, the first working oil port 124, the second oil inlet 131, and the second working oil port 134, and return oil of the hydraulic motor 2 flows back to the oil tank through the second oil return port 133.
When the second electromagnetic directional valve 12 is electrified, the oil pump 1 supplies oil to the arm support to drive the arm support to be unfolded or retracted; when the third electromagnetic directional valve 13 is electrified, the oil pump 1 supplies oil to the supporting leg to drive the supporting leg to extend or retract.
The oil pump 1 supplies oil to actuating mechanisms such as supporting legs and arm supports of engineering vehicles and simultaneously supplies oil to a hydraulic system of a hydraulic wrench. The hydraulic wrench is arranged on an engineering vehicle, can be used for equipment maintenance in a factory building, outdoor equipment maintenance in an oil field, a coal mine and the like, is suitable for special occasions where high voltage electricity cannot be used or is not used, and has remarkable economic and social benefits.
The first electromagnetic directional valve 8, the second electromagnetic directional valve 12 and the third electromagnetic directional valve 13 can be driven by 24V low-voltage direct current and can also be driven by low-voltage direct current lower than 24V.
Further, a filter 14 is arranged between the oil pump 1 and the second electromagnetic directional valve 12, and the filter 14 can filter impurities in the hydraulic oil, so that the stability of the hydraulic system is improved.
Further, a third overflow valve 15 is arranged between the filter 14 and the second electromagnetic directional valve 12, and the third overflow valve 15 can play a role in stabilizing pressure and improve stability.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A hydraulic wrench is characterized by comprising an oil pump (1), a hydraulic motor (2), a pump station (3) and a hydraulic torque wrench (4);
the oil pump (1), the hydraulic motor (2), the pump station (3) and the hydraulic torque wrench (4) are sequentially connected, and the oil pump (1) is driven by low-voltage direct current;
the hydraulic wrench also comprises a first hydraulic control reversing valve (6), a second hydraulic control reversing valve (7) and a first electromagnetic reversing valve (8);
the pump station (3) is connected with a first cavity of the hydraulic torque wrench (4) through a first hydraulic control reversing valve (6); the pump station (3) is connected with a second cavity of the hydraulic torque wrench (4) through a second hydraulic control reversing valve (7);
the first electromagnetic directional valve (8) is driven by low-voltage direct current, and the first electromagnetic directional valve (8) is used for driving the first hydraulic control directional valve (6) and the second hydraulic control directional valve (7) to change directions;
the first hydraulic control reversing valve (6) comprises a first oil port (61), a second oil port (62), a third oil port (63) and a first reversing oil port (64); the second hydraulic control reversing valve (7) comprises a fourth oil port (74), a fifth oil port (72), a sixth oil port (73) and a second reversing oil port (71); the first electromagnetic directional valve (8) comprises a seventh oil port (81), an eighth oil port (82) and a ninth oil port (83);
an outlet of the pump station (3) is respectively connected with a first oil port (61), a fourth oil port (74) and an eighth oil port (82), the second oil port (62) is connected with a first cavity of the hydraulic torque wrench (4), and the fifth oil port (72) is connected with a second cavity of the hydraulic torque wrench (4);
the hydraulic wrench further comprises an oil tank, the oil tank is connected with an inlet of the pump station (3), the third oil port (63), the sixth oil port (73) and the seventh oil port (81) are respectively connected with the oil tank, and the third oil port (63), the sixth oil port (73) and the seventh oil port (81) are communicated with each other;
the first reversing oil port (64) is connected with the ninth oil port (83), and the second reversing oil port (71) is connected with the second oil port (62).
2. Hydraulic wrench according to claim 1, characterised in that the oil pump (1) is connected to the hydraulic motor (2) by means of a quick coupling (5).
3. The hydraulic wrench according to claim 1, characterised in that a one-way valve (9) is provided between the first and second hydraulic control directional valves (6, 7) and the pump station (3).
4. The hydraulic wrench according to claim 3, characterized in that a first overflow valve (10) is provided between the check valve (9) and the pump station (3), and a second overflow valve (11) is provided between the second hydraulic directional control valve (7) and the hydraulic torque wrench (4).
5. A working vehicle, characterized in that it comprises a hydraulic wrench as claimed in any one of claims 1-4.
6. The work vehicle according to claim 5, characterized in that the work vehicle further comprises a second electromagnetic directional valve (12) and a third electromagnetic directional valve (13), the second electromagnetic directional valve (12) and the third electromagnetic directional valve (13) being driven by low voltage direct current;
the oil pump (1), the second electromagnetic directional valve (12), the third electromagnetic directional valve (13) and the hydraulic motor (2) are sequentially connected, a first oil outlet (122) of the second electromagnetic directional valve (12) is connected with the arm support, and a second oil outlet (132) of the third electromagnetic directional valve is connected with the supporting legs.
7. The work vehicle according to claim 6, characterized in that a filter (14) is arranged between the oil pump (1) and the second electromagnetic directional valve (12).
8. The work vehicle according to claim 7, characterized in that a third overflow valve (15) is arranged between the filter (14) and the second electromagnetic directional valve (12).
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| CN201910547930.1A CN110206794B (en) | 2019-06-24 | 2019-06-24 | Hydraulic wrench and engineering vehicle |
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|---|---|---|---|
| CN201910547930.1A CN110206794B (en) | 2019-06-24 | 2019-06-24 | Hydraulic wrench and engineering vehicle |
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| CN110206794A CN110206794A (en) | 2019-09-06 |
| CN110206794B true CN110206794B (en) | 2020-04-14 |
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| CN202448078U (en) * | 2012-02-20 | 2012-09-26 | 重庆运达科技有限公司 | Internal combustion hydraulic bolt spanner for railway |
| CN106159629A (en) * | 2015-03-30 | 2016-11-23 | 辽宁省送变电工程公司 | A kind of wire crimping connector dynamic Control platform |
| CN104999261A (en) * | 2015-05-25 | 2015-10-28 | 江苏飞耀机械制造有限公司 | Automatic blade bolt assembling and disassembling device type bolt trolley |
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| CN110206794A (en) | 2019-09-06 |
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