CN211175507U - Injection check valve of die casting machine and die casting machine hydraulic system applying injection check valve - Google Patents
Injection check valve of die casting machine and die casting machine hydraulic system applying injection check valve Download PDFInfo
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- CN211175507U CN211175507U CN201921699746.0U CN201921699746U CN211175507U CN 211175507 U CN211175507 U CN 211175507U CN 201921699746 U CN201921699746 U CN 201921699746U CN 211175507 U CN211175507 U CN 211175507U
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- 238000002347 injection Methods 0.000 title claims abstract description 79
- 239000007924 injection Substances 0.000 title claims abstract description 79
- 238000004512 die casting Methods 0.000 title claims abstract description 49
- 238000009434 installation Methods 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 40
- 210000004907 gland Anatomy 0.000 claims description 18
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 206
- 239000010720 hydraulic oil Substances 0.000 description 25
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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Abstract
The utility model discloses an injection check valve of a die casting machine, which comprises a valve body, an installation cavity, an oil inlet, an oil outlet, a main control oil hole, an auxiliary control oil hole, an oil groove, a valve core and an elastic reset mechanism; the installation cavity is arranged in the valve body, and the valve core is movably arranged in the installation cavity along the axial direction; the oil inlet hole is arranged along the axial direction of the valve core and is communicated with the mounting cavity and an external oil supply device; the oil outlet is in conduction connection with the mounting cavity and a back injection cavity of an external die-casting device; one end of the valve core is opposite to the oil inlet hole, and the elastic resetting mechanism is connected between the other end of the valve core and the installation cavity; the utility model aims at providing a die casting machine hydraulic system that can realize that the die casting machine that initiatively opens, close rapidly presses and penetrates check valve and use it reduces loss of pressure when slow speed or quick oil feed, and the through flow volume is big, closes rapidly when the pressure boost, and the reaction is rapid, simple structure, easy maintenance.
Description
Technical Field
The utility model relates to a check valve technical field especially relates to a die casting machine hydraulic system that check valve and applied it is penetrated to die casting machine pressure.
Background
The die casting machine requires that the quick oil way is quickly closed during injection pressurization so as to achieve the purpose of quickly building pressure, and a check valve is needed for quickly closing the quick oil way, and the check valve needs to have a large flow and is quick in response. The one-way valve designed by the domestic die casting machine at present has the following defects: when the rapid oil passes through, the oil is required to jack the check valve open, and certain pressure loss exists; the closing of the one-way valve is realized by the pressure of a spring, the closing time of the one-way valve is longer when the pressure of the spring is small, and the pressure loss is large when oil flows through the one-way valve when the spring force is large, so that the oil can be fed quickly.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a die casting machine hydraulic system that can realize that the die casting machine that initiatively opens, close rapidly presses and penetrates check valve and use it.
To achieve the purpose, the utility model adopts the following technical proposal: a die casting machine injection check valve comprises a valve body, an installation cavity, an oil inlet hole, an oil outlet hole, a main control oil hole, an auxiliary control oil hole, an oil groove, a valve core and an elastic reset mechanism, wherein the valve body is arranged in the installation cavity; the installation cavity is arranged in the valve body, and the valve core is movably arranged in the installation cavity along the axial direction; the oil inlet hole is arranged along the axial direction of the valve core and is communicated with the mounting cavity and an external oil supply device; the oil outlet is in conduction connection with the mounting cavity and a back injection cavity of an external die-casting device; one end of the valve core is opposite to the oil inlet hole, and the elastic resetting mechanism is connected between the other end of the valve core and the installation cavity; when the valve is in a closed state, one end of the valve core is in contact seal with the valve body, and the oil inlet hole is isolated from the oil outlet hole; when the valve is in an open state, one end of the valve core is separated from the valve body, and the oil inlet hole is communicated with the oil outlet hole; the oil groove is circumferentially arranged on the outer wall of the valve core, and the main control oil hole is communicated with the oil groove and an external oil supply device; the auxiliary control oil hole is formed in one end, far away from the oil inlet hole, of the valve body, and the auxiliary control oil hole is in conduction connection with the mounting cavity and a back injection cavity of an external die-casting device.
Preferably, the valve body comprises an oil path block, a mounting groove, a valve sleeve and a gland, the mounting groove is arranged in the oil path block, the valve sleeve is arranged in the mounting groove, and one end of the gland is connected to the opening end of the mounting groove and is matched with the oil path block to fix the valve sleeve; the mounting cavity is formed by matching an inner end surface of the gland with an inner end surface of the valve sleeve; the valve sleeve is provided with a first oil passing hole, a second oil passing hole and a third oil passing hole, and the first oil passing hole is in conduction connection with the inside of the valve sleeve and the oil inlet hole; the second oil passing hole is in conductive connection with the interior of the valve sleeve and the oil outlet hole, and the third oil passing hole is in conductive connection with the oil groove and the main control oil hole; and the distance between the second oil passing hole and one end of the valve sleeve close to the oil inlet hole is 3-8 mm.
Preferably, the valve sleeve comprises a connecting sleeve and a connecting ring, the connecting ring and the connecting sleeve are sequentially connected in the axial direction, and the inner diameter of the connecting sleeve is smaller than that of the connecting ring; the inner diameter of the connecting sleeve is matched with the outer diameter of the valve core, a positioning ring is formed at one end of the valve core, which is far away from the oil inlet hole, and the outer diameter of the positioning ring is matched with the inner diameter of the connecting ring; the oil groove is formed by matching the connecting sleeve, the connecting ring, the valve sleeve, the positioning ring and the valve core; the first oil passing hole is formed in the connecting sleeve along the axial direction, and the second oil passing hole is formed in the side wall of the connecting sleeve along the circumferential direction; and the oil path block is provided with an annular first oil distribution groove which is in conduction connection with the third oil passing hole.
Preferably, at least one second oil passing hole is formed in the second oil passing hole, the second oil passing hole is formed along the circumferential direction of the valve sleeve, and an annular second oil distribution groove which is in conduction connection with the second oil passing hole is formed in the inner end face of the oil path block.
Preferably, a first connecting inclined plane is formed on the outer edge of one end, close to the oil inlet, of the valve core along the circumferential direction, a limiting ring is formed on the inner end face of the connecting sleeve, and a second connecting inclined plane matched with the first connecting inclined plane is arranged at one end of the limiting ring.
Preferably, the connecting sleeve is provided with a first sealing ring and a second sealing ring along the circumferential direction, and the first sealing ring and the second sealing ring are respectively positioned at two sides of the second oil passing hole; the inner end of the oil circuit block is provided with a connecting groove, one end of the connecting sleeve is positioned in the connecting groove, and the first sealing ring is arranged between the connecting sleeve and the connecting groove; and the connecting ring is provided with a third sealing ring along the circumferential direction, and the second sealing ring and the third sealing ring are respectively positioned at two sides of the third oil passing hole.
Preferably, a fourth sealing ring is arranged at one end of the gland, which is positioned in the mounting cavity, along the circumferential direction; and an oil passing notch which is in conduction connection with the auxiliary control oil hole is formed in the other end, close to the oil inlet hole, of the gland.
Preferably, the elastic reset mechanism is an expansion spring connected between the installation cavity and the valve core.
A die casting machine hydraulic system comprises a rapid energy accumulator, a one-way control valve, a rapid valve, an injection oil cylinder, a booster valve, a booster energy accumulator and the die casting machine injection one-way valve; the rapid energy accumulator is in conducting connection with the one-way control valve and the rapid valve through pipelines, the rapid valve is in conducting connection with an oil inlet hole of the injection one-way valve of the die casting machine through a pipeline, and the one-way control valve is in conducting connection with a main control oil hole of the injection one-way valve of the die casting machine through a pipeline; the oil outlet hole of the injection one-way valve of the die casting machine is in conduction connection with the injection back cavity of the injection oil cylinder through a pipeline, and the auxiliary control oil hole of the injection one-way valve of the die casting machine is in conduction connection with the injection back cavity of the injection oil cylinder through a pipeline; the pressurizing energy accumulator is in conduction connection with the pressurizing valve through a pipeline, the pressurizing valve is connected with the pressurizing oil cylinder through a pipeline, and the output end of the pressurizing oil cylinder is connected with a pushing piston arranged in an injection rear cavity of the injection oil cylinder.
By adopting the structure, the hydraulic oil is added or discharged from the main control oil hole and the oil groove, the purpose of controlling the opening or closing of the check valve is achieved, the flow rate is large, the control is simple, and the pressure loss can not be generated when the valve core is opened; the auxiliary control oil hole and the oil outlet hole are in conduction connection with an injection back cavity of an external injection device, when the pressure of the injection back cavity reaches a preset value, the auxiliary control oil hole generates a feedback, the pressure difference between two ends of the valve core enables the valve core to be quickly closed, the reaction is quick, and the closing time is short.
Drawings
The accompanying drawings are provided to further illustrate the present invention, but the content in the accompanying drawings does not constitute any limitation to the present invention.
FIG. 1 is a schematic sectional view of the present invention;
FIG. 2 is a schematic cross-sectional view taken at A-A in FIG. 1;
fig. 3 is a schematic sectional view of the valve sleeve of the present invention;
fig. 4 is a schematic connection diagram of the hydraulic system of the medium pressure die casting machine of the present invention.
Wherein: the quick injection valve comprises a valve body 1, a mounting cavity 2, an oil inlet hole 3, an oil outlet hole 4, a main control oil hole 5, an auxiliary control oil hole 6, an oil groove 7, a valve core 8, a positioning ring 8a, an elastic resetting mechanism 9, an oil path block 10, a valve sleeve 11, a first oil passing hole 11a, a second oil passing hole 11b, a third oil passing hole 11c, a connecting sleeve 11d, a connecting ring 11e, a gland 12, an oil passing notch 12a, a first sealing ring 13, a second sealing ring 14, a third sealing ring 15, a fourth sealing ring 16, a quick energy accumulator 17, a one-way control valve 18, a quick valve 19, an injection oil cylinder 20, a pressurization oil cylinder 21, a pressurization valve 22, a pressurization energy accumulator 23, a first oil distributing groove 24, a second oil distributing groove 25 and an injection one-way valve.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
Referring to fig. 1 to 4, the injection check valve of the die casting machine of the present embodiment includes a valve body 1, a mounting cavity 2, an oil inlet hole 3, an oil outlet hole 4, a main control oil hole 5, an auxiliary control oil hole 6, an oil groove 7, a valve core 8, and an elastic return mechanism 9.
The installation cavity 2 is arranged in the valve body 1, and the valve core 8 is movably arranged in the installation cavity 2 along the axial direction.
The oil inlet hole 3 is arranged along the axial direction of the valve core 8 and is communicated with the installation cavity 2 and an external oil supply device; the oil outlet 4 is in conduction connection with the mounting cavity 2 and a back injection cavity of an external die-casting device.
One end of the valve core 8 is opposite to the oil inlet hole 3, and the elastic resetting mechanism 9 is connected between the other end of the valve core 8 and the installation cavity 2.
In a closed state, one end of the valve core 8 is in contact seal with the valve body 1, and the oil inlet hole 3 is isolated from the oil outlet hole 4; in the opening state, one end of the valve core 8 is separated from the valve body 1, and the oil inlet hole 3 is communicated with the oil outlet hole 4.
The oil groove 7 is circumferentially arranged on the outer wall of the valve core 8, and the main control oil hole 5 is in conduction connection with the oil groove 7 and an external oil supply device.
The auxiliary control oil hole 6 is formed in one end, far away from the oil inlet hole 3, of the valve body 1, and the auxiliary control oil hole 6 is in conduction connection with the mounting cavity 2 and a back injection cavity of an external die-casting device.
With the structure, for convenience of description, a conduction region between the oil inlet hole 3 and the oil outlet hole 4 of the mounting cavity 2, namely, a right side part of the valve element 8 in the figure, is named as an oil inlet cavity, a conduction region between the oil groove 7 and the main control oil hole 5 is named as a main control cavity, and a conduction region between the mounting cavity 2 and the auxiliary control oil hole 6 is named as an auxiliary control cavity.
And in the opening process of the check valve, hydraulic oil is added into the oil groove 7 along the main control oil hole 5 by an external oil supply device, the valve core 8 is pushed by the hydraulic oil to move, one end of the valve core 8 is separated from the valve body 1 to complete pre-opening, the oil inlet hole 3 is communicated with the oil outlet hole 4, and the external oil supply device enters from the oil inlet hole 3 and then is output from the oil outlet hole 4. The valve core is pushed by hydraulic oil through the oil groove 7 to achieve the effect of opening the one-way valve, the main oil way hydraulic oil entering from the oil inlet hole 3 does not need to push the valve core 8, pressure loss cannot be generated, and the output process is stable.
In the closing process of the check valve, the hammer head of the injection device reaches a limit position, the pressure of the injection back cavity of the injection device gradually rises, the auxiliary control cavity is in conduction connection with the injection back cavity of the injection device, when the pressure of the injection back cavity of the injection device is close to the oil inlet pressure of the oil inlet cavity, the pressure of the auxiliary control cavity is also close to the oil inlet pressure of the oil inlet cavity, at the moment, the external control valve controls the hydraulic oil in the main control cavity to be discharged, the hydraulic oil returns to the external oil supply device along the main control oil hole 5, the valve core 8 is rapidly pushed to one side of the oil inlet hole 3 under the action of the oil discharge pressure difference between the elastic reset mechanism 9 and the main control cavity, and one end of the valve core 8 is in contact sealing with.
By adopting the structure, hydraulic oil is introduced into the main control cavity in advance, the valve core 8 is jacked open by the hydraulic oil, and when oil is fed, the hydraulic oil of the main oil way does not need to push the valve core 8, so that pressure loss is avoided, the pressure building time of the external injection device is reduced, and the injection speed of the external injection device is improved; when the external injection device reaches a limit value, the pressure of the main control cavity is released, and the pressure of the auxiliary control cavity is greater than that of the oil inlet cavity, so that the effect of quickly relating the valve core 8 is achieved, the closing time is short, and the reaction is quick. The utility model has the advantages of active opening and rapid closing.
Preferably, the valve body 1 includes an oil path block 10, a mounting groove, a valve sleeve 11 and a gland 12, the mounting groove is arranged in the oil path block 10, the valve sleeve 11 is arranged in the mounting groove, one end of the gland 12 is connected to the opening end of the mounting groove and is matched with and fixed to the valve sleeve 11 by the oil path block 10.
The mounting cavity 2 is formed by matching the inner end surface of the gland 12 with the inner end surface of the valve sleeve 11.
The valve sleeve 11 is provided with a first oil passing hole 11a, a second oil passing hole 11b and a third oil passing hole 11c, and the first oil passing hole 11a is in conduction connection with the inside of the valve sleeve 11 and the oil inlet hole 3; the second oil passing hole 11b is connected to the inside of the valve sleeve 11 and the oil outlet 4 in a conduction manner, and the third oil passing hole 11c is connected to the oil groove 7 and the main control oil hole 5 in a conduction manner.
The distance between the second oil passing hole 11b and one end of the valve sleeve 11 close to the oil inlet hole 3 is 3-8 mm.
By adopting the structure, the valve core 8 is arranged in the installation cavity 2 formed by the matching of the valve sleeve 11 and the gland 12 and slides in the valve sleeve 11 along the axial direction, one end of the valve core 8, the first oil passing hole 11a and the second oil passing hole 11b are matched to complete the opening or closing of the one-way valve, the valve body 1 and the valve sleeve 11 are kept in close contact, good sealing performance is provided for the one-way valve, and the hydraulic oil of each cavity can not leak mutually. The distance between the second oil passing hole 11b and one end of the valve sleeve 11 is 3-8mm, so that the valve core 8 has a larger conduction flow under a certain moving stroke.
Preferably, the valve housing 11 includes a connecting sleeve 11d and a connecting ring 11e, the connecting ring 11e and the connecting sleeve 11d are sequentially connected in an axial direction, and an inner diameter of the connecting sleeve 11d is smaller than an inner diameter of the connecting ring 11 e.
The inner diameter of the connecting sleeve 11d is matched with the outer diameter of the valve core 8, a positioning ring 8a is formed at one end, far away from the oil inlet 3, of the valve core 8, and the outer diameter of the positioning ring 8a is matched with the inner diameter of the connecting ring 11 e.
The oil groove 7 is formed by matching the connecting sleeve 11d, the connecting ring 11e, the valve sleeve 11, the positioning ring 8a and the valve core 8.
The first oil passing hole 11a is axially formed in the connecting sleeve 11d, and the second oil passing hole 11b is circumferentially formed in the side wall of the connecting sleeve 11 d.
The oil path block 10 is provided with an annular first oil distribution groove 24 which is connected to the third oil passing hole 11c in a conduction manner.
Adopt this kind of structure, the outer wall of adapter sleeve 11d and case 8 closely laminates, keeps closely laminating between go-between 11e and the holding ring 8a, guarantees that the both sides of oil groove 7 all have good sealed effect, has good leakproofness, and hydraulic oil can push case 8 effectively in oil groove 7 to open case 8 and make inlet port 3 and oil outlet switch on.
The outer wall of the connecting sleeve 11d and the outer wall of the connecting ring 11e are circumferentially provided with a plurality of annular grooves, so that an oil cushion can be generated on the periphery of the valve core 8, a supporting effect is achieved, sliding friction of the valve core 8 is reduced, and the valve core 8 is prevented from being locked.
The first oil distribution groove 24 can play a role in guiding and guiding flow, and prevents hydraulic oil from generating turbulence.
Preferably, at least one second oil passing hole 11b is provided, the second oil passing hole 11b is provided along a circumferential direction of the valve housing 11, and an annular second oil distribution groove 25 conductively connected to the second oil passing hole 11b is provided on an inner end surface of the oil path block 10.
With this structure, in this embodiment, four second oil passing holes 11b are provided, and every two oil passing holes are symmetrically distributed along the central axis of the valve sleeve 11.
The second oil passing holes 11b are circumferentially distributed and are matched with the second oil distribution groove 25, so that large-flow hydraulic oil can be introduced, the hydraulic oil of the main path can be kept stable, and the turbulent flow phenomenon is avoided.
Preferably, a first connecting inclined surface is formed on the outer edge of one end, close to the oil inlet hole 3, of the valve core 8 along the circumferential direction, a limiting ring is formed on the inner end surface of the connecting sleeve 11d, and a second connecting inclined surface adapted to the first connecting inclined surface is arranged at one end of the limiting ring.
By adopting the structure, the first connecting inclined surface and the second connecting inclined surface are matched with the fixed valve core 8, the end part of the valve core 8 is sealed, and the sealing effect between the valve core 8 and the valve sleeve 11 is improved.
Preferably, the connecting sleeve 11d is provided with a first sealing ring 13 and a second sealing ring 14 along the circumferential direction, and the first sealing ring 13 and the second sealing ring 14 are respectively located at two sides of the second oil passing hole 11 b.
The inner of oil circuit piece 10 is equipped with the spread groove, the one end of adapter sleeve 11d is located in the spread groove, first sealing washer 13 sets up adapter sleeve 11d with between the spread groove.
The connecting ring 11e is provided with a third sealing ring 15 along the circumferential direction, and the second sealing ring 14 and the third sealing ring 15 are respectively located at two sides of the third oil passing hole 11 c.
By adopting the structure, the first sealing ring 13, the second sealing ring 14 and the third sealing ring 15 are matched, so that the valve sleeve 11 is ensured to be in close contact with the oil circuit block 10, the main oil inlet cavity, the main control cavity and the auxiliary control cavity are ensured to be sealed, hydraulic oil cannot seep among the cavities, the sealing effect of the valve core 8 is improved, and the movement accuracy of the valve core 8 is improved.
Preferably, one end of the gland 12, which is located in the installation cavity 2, is provided with a fourth sealing ring 16 along the circumferential direction; and an oil passing notch 12a which is in conduction connection with the auxiliary control oil hole 6 is formed in the other end, close to the oil inlet hole 3, of the gland 12.
By adopting the structure, the gland 12 is in sealing connection with the oil circuit block 10 through the fourth sealing ring 16, so that the sealing property of the auxiliary control cavity is ensured; the hydraulic oil enters or flows out of the auxiliary control cavity through the auxiliary control oil hole 6 and the oil passing notch 12a in a matched mode, the pressure in the auxiliary control cavity is increased when the hydraulic oil enters, the valve core 8 is pushed to move to close the one-way valve, the pressure in the auxiliary control cavity is reduced when the hydraulic oil flows out, and the valve core 8 moves to open the one-way valve under the driving of the hydraulic oil in the main control cavity.
Preferably, the elastic return mechanism 9 is an extension spring connected between the installation cavity 2 and the valve core 8.
By adopting the structure, the valve core 8 is quickly pushed to reset through the pressure matching of the telescopic spring and the hydraulic oil in the auxiliary control cavity, the reaction speed of the one-way valve is improved, the time required by locking the valve core 8 is reduced, and the effect of quickly closing the one-way valve is achieved.
A hydraulic system of a die casting machine comprises a quick energy accumulator 17, a one-way control valve 18, a quick valve 19, a shot oil cylinder 20, a booster oil cylinder 21, a booster valve 22, a booster energy accumulator 23 and the shot one-way valve 26 of the die casting machine.
The quick energy accumulator 17 is in conduction connection with the one-way control valve 18 and the quick valve 19 through pipelines, the quick valve 19 is in conduction connection with the oil inlet hole 3 of the die-casting machine injection one-way valve 26 through a pipeline, and the one-way control valve 18 is in conduction connection with the main control oil hole 5 of the die-casting machine injection one-way valve 26 through a pipeline.
The oil outlet 4 of the injection one-way valve 26 of the die casting machine is in conduction connection with the injection back cavity of the injection oil cylinder 20 through a pipeline, and the auxiliary control oil hole 6 of the injection one-way valve 18 of the die casting machine is in conduction connection with the injection back cavity of the injection oil cylinder 20 through a pipeline.
The pressurizing energy accumulator 23 is in conduction connection with the pressurizing valve 22 through a pipeline, the pressurizing valve 22 is connected with the pressurizing oil cylinder 21 through a pipeline, and the output end of the pressurizing oil cylinder 21 is connected with a pushing piston arranged in the injection back cavity of the injection oil cylinder 20.
With this structure, when the hydraulic system is in a static state, the one-way control valve 18 is opened, the quick valve 19 is closed, and hydraulic oil enters the main control oil hole 5 from the quick energy accumulator 17 through the one-way control valve 18 and pushes the valve element 8 to open.
When the hydraulic system is in the injection state, the one-way control valve 18 is kept in the open state, the quick valve 19 is opened, the hydraulic oil flows from the quick energy accumulator 17 to the oil inlet hole 3 through the quick valve 19, and then the hydraulic oil flows out of the oil outlet and enters the post-injection cavity of the injection cylinder 20 and pushes the piston of the injection cylinder 20.
When the hydraulic system is in a pressurized state, hydraulic oil enters the pressurizing oil cylinder 21 from the pressurizing energy storage 23 through the pressurizing valve 22, the output end of the pressurizing oil cylinder 21 pushes the piston, and the pressure of the post-injection cavity of the injection oil cylinder 20 is increased.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. The injection check valve of the die casting machine is characterized by comprising a valve body, a mounting cavity, an oil inlet hole, an oil outlet hole, a main control oil hole, an auxiliary control oil hole, an oil groove, a valve core and an elastic reset mechanism;
the installation cavity is arranged in the valve body, and the valve core is movably arranged in the installation cavity along the axial direction;
the oil inlet hole is arranged along the axial direction of the valve core and is communicated with the mounting cavity and an external oil supply device; the oil outlet is in conduction connection with the mounting cavity and a back injection cavity of an external die-casting device;
one end of the valve core is opposite to the oil inlet hole, and the elastic resetting mechanism is connected between the other end of the valve core and the installation cavity;
when the valve is in a closed state, one end of the valve core is in contact seal with the valve body, and the oil inlet hole is isolated from the oil outlet hole; when the valve is in an open state, one end of the valve core is separated from the valve body, and the oil inlet hole is communicated with the oil outlet hole;
the oil groove is circumferentially arranged on the outer wall of the valve core, and the main control oil hole is communicated with the oil groove and an external oil supply device;
the auxiliary control oil hole is formed in one end, far away from the oil inlet hole, of the valve body, and the auxiliary control oil hole is in conduction connection with the mounting cavity and a back injection cavity of an external die-casting device.
2. The injection check valve of the die casting machine as claimed in claim 1, wherein said valve body comprises an oil passage block, a mounting groove, a valve sleeve and a gland, said mounting groove is arranged in said oil passage block, said valve sleeve is arranged in said mounting groove, one end of said gland is connected to an opening end of said mounting groove and cooperates with said oil passage block to fix said valve sleeve;
the mounting cavity is formed by matching an inner end surface of the gland with an inner end surface of the valve sleeve;
the valve sleeve is provided with a first oil passing hole, a second oil passing hole and a third oil passing hole, and the first oil passing hole is in conduction connection with the inside of the valve sleeve and the oil inlet hole; the second oil passing hole is in conductive connection with the interior of the valve sleeve and the oil outlet hole, and the third oil passing hole is in conductive connection with the oil groove and the main control oil hole;
and the distance between the second oil passing hole and one end of the valve sleeve close to the oil inlet hole is 3-8 mm.
3. The injection check valve of the die casting machine as claimed in claim 2, wherein said valve sleeve comprises a connecting sleeve and a connecting ring, said connecting ring and said connecting sleeve are axially connected in sequence and the inner diameter of said connecting sleeve is smaller than the inner diameter of said connecting ring;
the inner diameter of the connecting sleeve is matched with the outer diameter of the valve core, a positioning ring is formed at one end of the valve core, which is far away from the oil inlet hole, and the outer diameter of the positioning ring is matched with the inner diameter of the connecting ring;
the oil groove is formed by matching the connecting sleeve, the connecting ring, the valve sleeve, the positioning ring and the valve core;
the first oil passing hole is formed in the connecting sleeve along the axial direction, and the second oil passing hole is formed in the side wall of the connecting sleeve along the circumferential direction;
and the oil path block is provided with an annular first oil distribution groove which is in conduction connection with the third oil passing hole.
4. The injection check valve of the die casting machine as claimed in claim 2, wherein at least one second oil passing hole is provided, the second oil passing hole is provided along a circumferential direction of the valve sleeve, and an annular second oil distribution groove in conduction connection with the second oil passing hole is provided on an inner end surface of the oil path block.
5. The injection check valve of the die casting machine as claimed in claim 3, wherein a first connecting inclined surface is formed on the outer edge of one end of the valve core close to the oil inlet hole along the circumferential direction, a limit ring is formed on the inner end surface of the connecting sleeve, and a second connecting inclined surface adapted to the first connecting inclined surface is formed at one end of the limit ring.
6. The injection check valve of the die casting machine as defined in claim 3, wherein the connecting sleeve is provided with a first sealing ring and a second sealing ring along the circumferential direction, and the first sealing ring and the second sealing ring are respectively positioned at two sides of the second oil passing hole;
the inner end of the oil circuit block is provided with a connecting groove, one end of the connecting sleeve is positioned in the connecting groove, and the first sealing ring is arranged between the connecting sleeve and the connecting groove;
and the connecting ring is provided with a third sealing ring along the circumferential direction, and the second sealing ring and the third sealing ring are respectively positioned at two sides of the third oil passing hole.
7. The injection check valve of the die casting machine as claimed in claim 2, wherein one end of said gland positioned in said mounting cavity is provided with a fourth seal ring along the circumferential direction; and an oil passing notch which is in conduction connection with the auxiliary control oil hole is formed in the other end, close to the oil inlet hole, of the gland.
8. The die casting machine shot check valve as defined in claim 1 wherein said resilient return mechanism is a telescoping spring connected between said mounting cavity and said valve core.
9. A die casting machine hydraulic system is characterized in that the system comprises a rapid energy accumulator, a one-way control valve, a rapid valve, an injection oil cylinder, a booster valve, a booster energy accumulator and the die casting machine injection one-way valve of any one of claims 1 to 8;
the rapid energy accumulator is in conducting connection with the one-way control valve and the rapid valve through pipelines, the rapid valve is in conducting connection with an oil inlet hole of the injection one-way valve of the die casting machine through a pipeline, and the one-way control valve is in conducting connection with a main control oil hole of the injection one-way valve of the die casting machine through a pipeline;
the oil outlet hole of the injection one-way valve of the die casting machine is in conduction connection with the injection back cavity of the injection oil cylinder through a pipeline, and the auxiliary control oil hole of the injection one-way valve of the die casting machine is in conduction connection with the injection back cavity of the injection oil cylinder through a pipeline;
the pressurizing energy accumulator is in conduction connection with the pressurizing valve through a pipeline, the pressurizing valve is connected with the pressurizing oil cylinder through a pipeline, and the output end of the pressurizing oil cylinder is connected with a pushing piston arranged in an injection rear cavity of the injection oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921699746.0U CN211175507U (en) | 2019-10-10 | 2019-10-10 | Injection check valve of die casting machine and die casting machine hydraulic system applying injection check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921699746.0U CN211175507U (en) | 2019-10-10 | 2019-10-10 | Injection check valve of die casting machine and die casting machine hydraulic system applying injection check valve |
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| CN211175507U true CN211175507U (en) | 2020-08-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701345A (en) * | 2019-10-10 | 2020-01-17 | 广东伊之密精密机械股份有限公司 | Injection check valve of die casting machine and die casting machine hydraulic system applying injection check valve |
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2019
- 2019-10-10 CN CN201921699746.0U patent/CN211175507U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701345A (en) * | 2019-10-10 | 2020-01-17 | 广东伊之密精密机械股份有限公司 | Injection check valve of die casting machine and die casting machine hydraulic system applying injection check valve |
| CN110701345B (en) * | 2019-10-10 | 2024-03-15 | 伊之密股份有限公司 | Injection check valve of die casting machine and die casting machine hydraulic system using same |
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Address after: No. 22 Keyuan 3rd Road, Shunde High tech Zone (Ronghang), Foshan City, Guangdong Province, 528306 Patentee after: Yizhimi Co.,Ltd. Address before: No. 22 Keyuan 3rd Road, Shunde High tech Zone (Ronghang), Foshan City, Guangdong Province, 528306 Patentee before: GUANGDONG YIZUMI PRECISION MACHINERY Co.,Ltd. |
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