CN210435336U - Pressure boosting isolation injection brake valve - Google Patents
Pressure boosting isolation injection brake valve Download PDFInfo
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- CN210435336U CN210435336U CN201921109361.4U CN201921109361U CN210435336U CN 210435336 U CN210435336 U CN 210435336U CN 201921109361 U CN201921109361 U CN 201921109361U CN 210435336 U CN210435336 U CN 210435336U
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Abstract
The utility model provides a pressure boosting isolation injection brake valve, which comprises a valve sleeve, a valve core arranged in the valve sleeve and a liquid outlet arranged in the radial direction of the valve sleeve; a liquid inlet is formed in one side of the valve sleeve, and a valve cover is arranged on the other side of the valve sleeve; the liquid inlet is hydraulically connected with the injection accumulator, and the liquid outlet is hydraulically connected with the injection cylinder; one end of the valve core, which is provided with the plunger, is positioned in the large cavity of the valve cover, and the front end of the valve core is matched with the liquid inlet to realize the closing of the valve core; a spring for resetting the valve core is arranged between the valve core and the valve cover; a liquid outlet is arranged on the valve cover corresponding to the position between the plunger and the valve sleeve and is hydraulically connected with an oil tank; the valve cover is provided with a liquid guide port, the liquid guide port is hydraulically connected with the liquid outlet, and a control valve is arranged on a connected hydraulic pipeline. The utility model discloses create simple structure, reasonable in design can cut off in advance and press the injection energy storage ware to pressing the cylinder fuel feeding, realizes brake braking, reduces hydraulic shock.
Description
Technical Field
The invention belongs to the technical field of hydraulic equipment and hydraulic components, and particularly relates to a boosting isolation injection brake valve.
Background
The injection system is an important component of the die casting machine, and the performance of the injection system is one of the key factors determining the quality of the die casting machine. In the current injection system, during the fast injection, the pressure oil for pushing the fast injection generally forms an isolation one-way valve through a gap between a floating piston and a pressurizing piston rod or uses a common one-way valve structure as the isolation one-way valve to realize the closing and isolation of the high-pressure oil pressurized by the injection cylinder, the closing and isolation can be completed when the pressurizing pressure of the injection cylinder is greater than the pressure of an energy accumulator for the fast injection, and the high impact of the fast injection on the die is finished at the moment, so the die fire leakage and the flash burr of the casting are easily caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a boosting isolation injection brake valve.
In order to solve the technical problems, the technical scheme created by the invention is realized as follows:
a pressure-boosting isolation injection brake valve comprises a valve sleeve and a valve core arranged in the valve sleeve, wherein a liquid outlet is formed in the valve sleeve in the radial direction;
a liquid inlet is formed in one side of the valve sleeve, and a valve cover is arranged on the other side of the valve sleeve; the liquid inlet is hydraulically connected with the injection accumulator, and the liquid outlet is hydraulically connected with the injection cylinder;
one end of the valve core, which is provided with the plunger, is positioned in the large cavity of the valve cover, and the front end of the valve core is matched with the liquid inlet to realize the closing of the valve core; a spring for resetting the valve core is arranged between the valve core and the valve cover; a liquid outlet is arranged on the valve cover corresponding to the position between the plunger and the valve sleeve and is hydraulically connected with an oil tank;
the valve cover is provided with a liquid guide port, the liquid guide port is hydraulically connected with the liquid outlet, and a control valve is arranged on a connected hydraulic pipeline.
Furthermore, the front end of the valve core is provided with a conical sealing part.
Further, the control valve adopts a sequence valve or an electromagnetic directional valve.
Furthermore, the valve core is provided with an installation hole along the axial direction, the spring is arranged in the installation hole, and one end of the spring extending out of the installation hole is propped against the valve cover.
Furthermore, one end of the liquid inlet of the valve sleeve is provided with an installation section, and the outer surface of the installation section is provided with a sealing groove.
Furthermore, the valve cover is provided with an installation platform, one end of the valve core, which is different from the liquid inlet, is inserted into the installation platform, and a sealing element is arranged between the valve core and the valve cover.
Further, the valve core is provided with a matching section for sliding matching with the valve sleeve, and the outer diameter of the matching section is larger than that of the front end part of the valve core.
Furthermore, the liquid outlet is evenly distributed with a plurality of liquid outlets.
The invention has the advantages and positive effects that:
the invention has simple structure and reasonable design, can cut off the oil supply of the injection energy accumulator to the injection cylinder in advance, realizes brake, reduces impact, and plays a role in isolating and blocking the injection energy accumulator when the supercharger provides higher pressure for the injection cylinder.
Drawings
FIG. 1 is a schematic view of the present invention when a sequence valve is used;
FIG. 2 is a schematic view of the invention when a solenoid directional valve is used;
FIG. 3 is a schematic structural diagram of a valve core in the invention;
fig. 4 is a schematic structural diagram of the valve sleeve in the invention;
fig. 5 is a schematic structural diagram of the valve cover in the invention.
In the figure: 1-a valve housing; 2-a valve core; 3-a liquid outlet; 4-liquid inlet; 5-valve cover; 6-large cavity; 7-a spring; 8-a liquid discharge port; 9-an oil tank; 10-a liquid guide port; 11-a control valve; 12-a mating segment; 13-a conical seal; 14-a mounting section; 15-sealing groove; 16-a mounting table; 17-a seal; 18-injection cylinder; 19-shot accumulator; 20-mounting holes.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The following detailed description of the embodiments of the invention is provided. For the convenience of clear description, in the following description, the cavity at the hydraulic oil inlet of the check valve provided by the invention is marked as a cavity a, the liquid outlet is marked as a cavity B, and the large cavity of the valve cover is marked as a cavity C.
A pressurized isolated injection brake valve is shown in figures 1 to 5 and comprises a valve sleeve 1, a valve core 2 arranged in the valve sleeve and a liquid outlet 3 arranged in the radial direction and penetrating through the valve sleeve;
one side of the valve sleeve is provided with a liquid inlet 4, and the other side of the valve sleeve is provided with a valve cover 5; the liquid inlet is hydraulically connected with an injection energy accumulator 19, and the liquid outlet is hydraulically connected with an injection cylinder 18;
one end of the valve core, which is provided with the plunger, is positioned in the large cavity 6 of the valve cover, and the front end of the valve core is matched with the liquid inlet to realize the closing of the valve core; a spring 7 for resetting the valve core is arranged between the valve core and the valve cover; a liquid outlet 8 is arranged on the valve cover corresponding to the position between the plunger and the valve sleeve and is hydraulically connected with an oil tank 9;
the valve cover is provided with a liquid guide port 10, the liquid guide port is hydraulically connected with the liquid outlet, and a control valve 11 is arranged on a connected hydraulic pipeline. Typically, the control valve is a sequence valve (in another alternative embodiment, the control valve is a solenoid directional valve). It should be noted that, during the injection process, the oil flowing through the control valve usually flows back to the oil tank directly, and only when the pressure of the injection cylinder rises to the set pressure of the sequence valve, the sequence valve is opened (or the electromagnetic directional valve is controlled to be electrically switched), and the oil enters the large cavity through the liquid guide port.
The front end of the valve core is provided with a conical sealing part 13. The conical sealing part can be better matched with the inner side (the neck part) of the opening of the valve sleeve, so that the valve body is closed and sealed.
The valve core is provided with an installation hole 20 along the axial direction, the spring is arranged in the installation hole, and one end of the spring extending out of the installation hole is propped against the valve cover.
The liquid outlets are evenly distributed with a plurality of liquid outlets. In general, the liquid outlets are arranged in a symmetrical (uniform) manner. One end of the liquid inlet of the valve sleeve is provided with an installation section 14, and the outer surface of the installation section is provided with a sealing groove 15.
The valve cover is provided with an installation platform 16, and the valve sleeve is abutted against the installation platform 16 of the valve cover (the valve sleeve and the valve cover are fixed by adopting a proper connection mode, such as welding and fixing, according to the requirement); one end of the valve core, which is different from the liquid inlet, is inserted in the mounting table, and a sealing element 17 is arranged between the valve core and the valve cover.
The valve core is provided with a mating section 12 for sliding engagement with the valve sleeve, the mating section having an outer diameter greater than the outer diameter of the forward end portion of the valve core. As the sliding fit part, the matching end part of the valve core is subjected to finish machining, and the front end of the valve core only needs to be subjected to finish machining with the end face of the conical sealing part matched with the liquid inlet, so that the manufacturing difficulty is reduced, and the machining cost is reduced.
Pressure oil of the injection accumulator enters the cavity A from the liquid inlet, flows into the cavity B after pushing the valve core open, and enters the injection cylinder through the liquid outlet, when the pressure of the injection cylinder rises to the set pressure of the sequence valve, the sequence valve is opened (or the electromagnetic valve is electrified and reversed), the pressure oil enters the cavity C, the (cross) area of the cavity C is larger than the sum of the areas of the cavity A and the cavity B, the pressure of the cavity B is equal to the pressure of the cavity C, and therefore the force balance equation of closing the valve core is obtained:
pb C > Pao a + Pb B, where Pao represents the a-cavity pressure (i.e., the pressure of the shot accumulator), Pb represents the B-cavity pressure, and Pc represents the C-cavity pressure; a is the cross-sectional area of the cavity A, B is the cross-sectional area of the cavity B, and C is the cross-sectional area of the cavity C;
the equations can be collated:
Pb*（C-B）>Pa*A；
because Pb < Pa due to C-B > A, the valve core can be closed under the condition that the pressure of the cavity B is lower by changing the area of the cavity C, so that the purpose of cutting off the oil supply of the injection accumulator to the injection cylinder in advance is achieved, and the injection early braking brake is realized.
The invention has simple structure and reasonable design, can cut off the oil supply of the injection energy accumulator to the injection cylinder in advance, realizes brake, reduces impact, and plays a role in isolating and blocking the injection energy accumulator when the supercharger provides higher pressure for the injection cylinder.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A pressure boost isolation injection brake valve is characterized in that: the valve comprises a valve sleeve and a valve core arranged in the valve sleeve, wherein a liquid outlet is arranged in the radial direction of the valve sleeve in a penetrating way;
a liquid inlet is formed in one side of the valve sleeve, and a valve cover is arranged on the other side of the valve sleeve; the liquid inlet is hydraulically connected with the injection accumulator, and the liquid outlet is hydraulically connected with the injection cylinder;
one end of the valve core, which is provided with the plunger, is positioned in the large cavity of the valve cover, and the front end of the valve core is matched with the liquid inlet to realize the closing of the valve core; a spring for resetting the valve core is arranged between the valve core and the valve cover; a liquid outlet is arranged on the valve cover corresponding to the position between the plunger and the valve sleeve and is hydraulically connected with an oil tank;
the valve cover is provided with a liquid guide port, the liquid guide port is hydraulically connected with the liquid outlet, and a control valve is arranged on a connected hydraulic pipeline.
2. A pressurized isolated shot brake valve according to claim 1 wherein: the front end of the valve core is provided with a conical sealing part.
3. A pressurized isolated shot brake valve according to claim 1 wherein: the control valve adopts a sequence valve or an electromagnetic reversing valve.
4. A pressurized isolated shot brake valve according to claim 1 wherein: the valve core is provided with a mounting hole along the axial direction, the spring is arranged in the mounting hole, and one end of the spring extending out of the mounting hole is propped against the valve cover.
5. A pressurized isolated shot brake valve according to claim 1 wherein: one end of the liquid inlet of the valve sleeve is provided with an installation section, and the outer surface of the installation section is provided with a sealing groove.
6. A pressurized isolated shot brake valve according to claim 1 wherein: the valve cover is provided with an installation platform, one end of the valve core, which is different from the liquid inlet, is inserted in the installation platform, and a sealing element is arranged between the valve core and the valve cover.
7. A pressurized isolated shot brake valve according to claim 1 wherein: the valve core is provided with a matching section which is used for being in sliding fit with the valve sleeve, and the outer diameter of the matching section is larger than that of the front end part of the valve core.
8. A pressurized isolated shot brake valve according to claim 1 wherein: the liquid outlet is evenly distributed with a plurality of liquid outlets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921109361.4U CN210435336U (en) | 2019-07-16 | 2019-07-16 | Pressure boosting isolation injection brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921109361.4U CN210435336U (en) | 2019-07-16 | 2019-07-16 | Pressure boosting isolation injection brake valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210435336U true CN210435336U (en) | 2020-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921109361.4U Active CN210435336U (en) | 2019-07-16 | 2019-07-16 | Pressure boosting isolation injection brake valve |
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| Country | Link |
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| CN (1) | CN210435336U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658227A (en) * | 2021-01-20 | 2021-04-16 | 辽宁凯文众鑫装备制造有限公司 | Injection braking mechanism |
-
2019
- 2019-07-16 CN CN201921109361.4U patent/CN210435336U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658227A (en) * | 2021-01-20 | 2021-04-16 | 辽宁凯文众鑫装备制造有限公司 | Injection braking mechanism |
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