Pneumatic mechanical kinetic energy vacuum valve

Abstract

The pneumatic mechanical kinetic energy vacuum valve comprises a base, a valve element seat and a valve element, the base comprises a containing cavity, a flow channel opening and an installation opening, the flow channel opening and the installation opening are formed in the wall of the containing cavity at intervals, the containing cavity comprises a movable cavity communicated with the installation opening and a plurality of flow channels communicated with the movable cavity, and the flow channels are communicated with the flow channel opening; the valve element seat is connected to the mounting opening in a sealed mode and provided with a mounting hole and an air exhaust hole, the mounting hole penetrates through the valve element seat, one end of the mounting hole is located in the movable cavity, one end of the air exhaust hole is communicated with the interior of the mounting hole, and the other end of the air exhaust hole penetrates through the valve element seat and is located outside the base; the valve element is arranged in the mounting hole in a penetrating mode and can be driven to move in the axial direction of the mounting hole. According to the utility model, the problem that the vacuum valve cannot close the air exhaust inlet in time or cannot completely close the air exhaust inlet is solved.

Description

Technical Field

[0001] The utility model relates to the field of vacuum technology, in particular to a pneumatic mechanical kinetic energy vacuum valve. Background Art

[0002] Vacuum die casting is a molding process that uses vacuum and pressure to inject molten metal (such as aluminum liquid) into a mold and form it into the desired shape after cooling. This method combines the characteristics of vacuum casting and pressure casting, aiming to improve the quality of castings, reduce internal defects, and ensure dimensional accuracy and surface finish.

[0003] Usually, the molded mold is used in conjunction with a vacuum valve. The base of the vacuum valve has a receiving cavity for receiving the end of the valve core. The cavity wall of the receiving cavity is provided with a flow channel and an air extraction inlet at intervals. The air extraction inlet is penetrated by a valve core for controlling the opening and closing of the air extraction inlet, and one end of the valve core is located in the receiving cavity. In the specific casting process, the base of the vacuum valve is connected to the mold or in the mold so that the flow channel is connected to the cavity in the mold, and the air extraction inlet is opened through the valve core. After the vacuum valve is started, the cavity in the mold can be vacuumed through the flow channel. Then, the mold is preheated. After the preheating is completed, the molten metal liquid is pressed into the cavity through a high-pressure driving device. When the cavity is filled with molten metal liquid, the molten metal liquid that continues to rush into the cavity will enter the receiving cavity through the flow channel and push the valve core, so that the valve core closes the air extraction inlet, thereby stopping the vacuuming. However, after the molten metal liquid enters the receiving cavity, it is difficult to form a force to push the valve core in a short time; sometimes, the air extraction inlet cannot be completely closed due to insufficient thrust generated by the molten metal liquid. During this process, part of the molten metal will enter the vacuum valve, causing damage to the vacuum valve.

[0004] It can be seen that the vacuum valve in the prior art is unable to close the exhaust inlet in time or completely close the exhaust inlet, resulting in molten metal liquid entering the vacuum valve and damaging the valve body. Utility Model Content

[0005] The utility model aims to provide a pneumatic mechanical kinetic energy vacuum valve to solve the problem that the vacuum valve in the prior art cannot close the air extraction inlet in time or cannot completely close the air extraction inlet.

[0006] In order to achieve the above-mentioned purpose of the utility model, an embodiment of the utility model provides a pneumatic mechanical kinetic energy vacuum valve, comprising:

[0007] The base comprises a receiving cavity, a flow channel opening and a mounting opening which are arranged on the wall of the receiving cavity at intervals, wherein the receiving cavity comprises a movable cavity connected to the mounting opening and a plurality of flow channels connected to the movable cavity, and the plurality of flow channels are connected to the flow channel opening;

[0008] A valve core seat is sealed and connected to the mounting port and has a mounting hole and an air extraction hole, wherein the mounting hole passes through the valve core seat and one end of the mounting hole is located in the active cavity, and one end of the air extraction hole is connected to the interior of the mounting hole and the other end passes through the valve core seat and is located outside the base;

[0009] The valve core is inserted into the mounting hole and can be driven to move along its axial direction, so that the first end of the valve core moves in the active cavity and the first end abuts against the orifice wall of one end of the mounting hole located in the active cavity to close the mounting hole.

[0010] As a further improvement of one embodiment of the utility model, it also includes a driving unit and a fixed seat, wherein the driving unit is arranged on the fixed seat, and the telescopic part of the driving unit is connected to the valve core so that when the telescopic part is driven to move, it drives the valve core to move along its axial direction.

[0011] As a further improvement of an embodiment of the utility model, wherein the driving unit is configured as a pneumatic driving mechanism, the telescopic portion is configured as a telescopic rod, and the telescopic rod is connected to the valve core in the axial direction of the valve core.

[0012] As a further improvement of an embodiment of the utility model, the valve core seat is connected to the fixing seat and can be detachably connected relative to the wall of the installation port.

[0013] As a further improvement of an embodiment of the utility model, the fixing seat is further provided with a connecting portion for connecting with the piston rod of the oil cylinder.

[0014] As a further improvement of an embodiment of the utility model, wherein the connecting portion includes a mounting hole arranged on a side of the fixing seat facing away from the base, and an internal thread is arranged on the inner wall of the mounting hole.

[0015] As a further improvement of an embodiment of the utility model, it also includes a vacuum tube, one end of the vacuum tube is connected to the air extraction hole, and the other end is connected to a negative pressure system.

[0016] As a further improvement of one embodiment of the utility model, the valve core includes a valve core body and a flange arranged on the circumference of the valve core body, the valve core body has a first end located in the active cavity, and the flange is arranged close to the first end of the valve core body and protrudes outward radially along the valve core body.

[0017] As a further improvement of an embodiment of the utility model, the flange and the first end of the valve core body cooperate to form a boss, the cross-sectional diameter of the boss gradually increases in the direction away from the first end of the valve core body, and the orifice wall of one end of the mounting hole located in the active cavity includes an abutment wall that abuts against the side wall of the boss.

[0018] As a further improvement of an embodiment of the utility model, the base includes a first module and a second module that are relatively arranged in a horizontal direction, and the first module and the second module are connected to form the base.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] By connecting the active cavity through multiple flow channels, on the one hand, molten metal liquid can quickly enter the active cavity, thereby improving the response speed of closing the mounting hole and preventing the molten metal liquid from entering the interior of the valve core seat through the mounting hole and then entering the vacuum valve through the exhaust hole; on the other hand, a large amount of molten metal liquid accumulates in the active cavity, thereby being able to generate sufficient thrust on the valve core, thereby enabling the valve core to effectively abut against the orifice wall of one end of the mounting hole located in the active cavity, avoiding inadequate closure of the mounting hole and preventing the molten metal solution from entering the valve core seat through the gap when the closure is inadequate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a pneumatic mechanical kinetic energy vacuum valve in one embodiment of the utility model;

[0022] Figure 2 for Figure 1 Schematic diagram of the local explosion structure;

[0023] Figure 3 for Figure 2 A schematic diagram of the structure in which the middle valve core seat and the valve core cooperate;

[0024] Figure 4 for Figure 3 Schematic diagram of the explosion structure;

[0025] Figure 5 for Figure 1 A cross-sectional schematic diagram of a pneumatic mechanical kinetic energy vacuum valve;

[0026] Figure 6 for Figure 5 The schematic diagram of the structure after removing the fixing seat and the driving unit;

[0027] Figure 7 for Figure 6 Schematic diagram of the explosion structure.

[0028] The above description of the drawings includes the following reference numerals:

[0029] 1. Base; 11. Accommodating cavity; 111. Active cavity; 112. Flow channel; 12. Flow channel opening; 13. Installation opening; 14. First module; 15. Second module;

[0030] 2. Valve core seat; 21. Mounting hole; 22. Air extraction hole;

[0031] 3. valve core; 31. valve core body; 32. flange;

[0032] 4. driving unit; 41. telescopic part;

[0033] 5. Fixed seat; 51. Connecting part;

[0034] 6. Vacuum tube; 61. Protective cover. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0037] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0038] In order to solve the problem that the vacuum valve in the prior art cannot close the air extraction inlet in time and completely, thereby causing molten metal liquid to enter the interior of the vacuum valve and damage the valve body, the utility model provides a pneumatic mechanical kinetic energy vacuum valve.

[0039] refer to Figure 1-7 As shown, the pneumatic mechanical kinetic energy vacuum valve provided by the utility model includes a base 1, a valve core seat 2, and a valve core 3.

[0040] Specifically, the base 1 includes a accommodating cavity 11, a flow channel opening 12 and a mounting opening 13 spaced apart on the wall of the accommodating cavity 11, the accommodating cavity 11 includes an active cavity 111 connected to the mounting opening 13 and a flow channel 112 connected to the active cavity, and the flow channel 112 is connected to the flow channel opening 12.

[0041] In this embodiment, the movable chamber 111 is used for the lower end of the valve core 3 to move therein, which does not mean that the wall of the movable chamber 111 will move.

[0042] Furthermore, the valve core seat 2 is sealed and connected to the mounting port 13 and has a mounting hole 21 and an exhaust hole 22. The mounting hole 21 passes through the valve core seat 2 and one end is located in the active cavity 111. One end of the exhaust hole 22 is connected to the interior of the mounting hole 21, and the other end passes through the valve core seat 2 and is located outside the base 1. It can be understood that by connecting a vacuum tube to the exhaust hole 22 and arranging a negative pressure system on the vacuum tube, the cavity in the mold can be vacuumed through the mounting hole 21, the exhaust hole 22 and the flow channel port 12.

[0043] Furthermore, the valve core 3 is inserted into the mounting hole 21 and can be driven to move along its axial direction, so that the first end of the valve core 3 moves in the active cavity 111, and the first end abuts against the orifice wall of one end of the mounting hole 21 located in the active cavity to close the mounting hole 21, and then close the exhaust hole 22.

[0044] In the specific operation process, when the molten metal liquid enters the base 1 through the flow channel opening 12, it quickly enters the active cavity 111 along the multiple flow channels 112 in the base.

[0045] With such arrangement, a plurality of flow channels 112 are connected to the active cavity 111. On the one hand, the molten metal liquid can quickly enter the active cavity 111, thereby improving the response speed of closing the mounting hole 21 and preventing the molten metal liquid from entering the valve core seat 2 through the mounting hole 21 and then entering the vacuum valve through the exhaust hole 22; on the other hand, a large amount of molten metal liquid accumulates in the active cavity 111, thereby being able to generate sufficient thrust on the valve core 3, thereby enabling the valve core 3 to effectively abut against the orifice wall of the mounting hole 21 located in the active cavity 111, preventing the mounting hole 21 from being closed inadequately, and preventing the molten metal solution from entering the valve core seat 2 through the gap when the mounting hole 21 is not closed inadequately.

[0046] Optionally, refer to Figure 5 In this embodiment, the pneumatic mechanical kinetic energy vacuum valve further comprises a driving unit 4 and a fixing seat 5, wherein the driving unit 4 is arranged on the fixing seat 5, and a telescopic portion 41 of the driving unit 4 is connected to the valve core 3, so that when the telescopic portion 41 is driven to move, the valve core 3 is driven to move along its axial direction.

[0047] It can be understood that when the valve core 3 moves along its axial direction, the first end of the valve core 3 moves in the active cavity 111, so that the first end abuts against the orifice wall of one end of the mounting hole 21 located in the active cavity 111 to close the mounting hole 21 and then close the exhaust hole; or, the first end is separated from the orifice wall of one end of the mounting hole 21 located in the active cavity 111 to open the mounting hole 21 and then open the exhaust hole 22.

[0048] With such arrangement, during the entire die-casting process, the timing of opening or closing the mounting hole 21 can be selected by adjusting the drive unit 4 to achieve a better casting effect, thereby effectively preventing the molten metal liquid from entering the vacuum valve through the exhaust hole 22.

[0049] Specifically, the driving unit 4 is configured as a pneumatic driving mechanism, the telescopic portion 41 is configured as a telescopic rod, and the telescopic rod is connected to the valve core 3 in the axial direction of the valve core 3. Optionally, the starting driving mechanism can be configured as a pneumatic motor, a cylinder, etc. Here, those skilled in the art can configure it according to actual needs, and all solutions that are the same or similar to this embodiment are covered within the protection scope of the present invention.

[0050] Further, refer to Figure 1 , as shown in FIG5 , the valve core seat 2 is connected to the fixing seat 5 and can be detachably connected relative to the wall of the mounting opening 13. Specifically, a detachable connection mechanism, such as a buckle structure, can be provided between the valve core seat 2 and the wall of the mounting opening 13.

[0051] With such arrangement, the pneumatic mechanical kinetic energy vacuum valve can be separated by separating the fixing seat 5 and the base 1. After separation, the base 1 can be separated from other components, so that the accommodating cavity 11 in the base can be cleaned conveniently.

[0052] Further, refer to Figure 1 As best shown, the fixing seat 5 is also provided with a connecting portion 51 for connecting with the piston rod of the oil cylinder. By controlling the movement of the piston rod of the oil cylinder, the fixing seat 5 can be conveniently matched with the mounting seat 1. The load during the processing is reduced.

[0053] Specifically, the connecting portion 51 includes a mounting hole disposed on a side of the fixing seat 5 facing away from the base, and an internal thread is disposed on the inner wall of the mounting hole. An external thread matching the internal thread can be disposed on the piston rod of the oil cylinder, so that the piston rod of the oil cylinder can be quickly connected to the mounting seat 5.

[0054] Optionally, the connection portion may also be configured as a buckle structure, for example, a mounting groove is provided on the side of the mounting seat 5 facing away from the base, and a buckle is provided on the groove wall, and accordingly, a hook that matches the buckle may be provided on the piston rod of the oil cylinder, and the piston rod is quickly connected to the mounting seat 5 through the matching connection of the hook and the buckle. In the specific operation process, those skilled in the art may make settings as needed, and all solutions that are the same or similar to the present embodiment are covered within the protection scope of the present invention.

[0055] Then turn Figure 2 The pneumatic mechanical kinetic energy vacuum valve further comprises a vacuum pumping tube 6, one end of which is connected to the vacuum hole 22, and the other end is connected to a negative pressure system. The vacuum pumping tube 6 can be used to vacuum the cavity inside the mold with the help of the base 1.

[0056] Optionally, in this embodiment, a protective cover 61 is disposed around the outer side of the vacuum tube 6 to protect the vacuum tube 6 during use.

[0057] Further, refer to Figure 3-4 As shown, the valve core 3 includes a valve core body 31 and a flange 32 arranged on the circumference of the valve core body, the first end of the valve core body is located in the active cavity 111, and the flange 32 is arranged close to the first end of the valve core body 31 and protrudes outward along the radial direction of the valve core body 31. The flange 32 is used to abut against the orifice wall of one end of the mounting hole 21 located in the active cavity 111.

[0058] Optionally, a valve core sleeve can also be provided on the valve core body 31, and the valve core sleeve is sleeved on the valve core body 31 and passed through the mounting hole 21 to achieve the effect of sealing a section of the mounting hole 21 away from the active chamber 111. With such a configuration, the portion of the mounting hole 21 located on the side of the valve core sleeve close to the active chamber 111 can be connected to the exhaust hole 22, thereby avoiding gas cross-flow on the side of the mounting hole 21 away from the active chamber 111 when the vacuum tube 6 is evacuated.

[0059] Furthermore, the flange 32 and the first end of the valve core body 31 cooperate to form a boss, the cross-sectional diameter of the boss gradually increases from the direction away from the first end of the valve core body 31, and the orifice wall of the end of the mounting hole located in the active cavity 111 includes an abutting wall that abuts against the side wall of the boss. Such an arrangement can make the valve core 3 fit more closely with the orifice wall of the mounting hole 21 when abutting.

[0060] Preferably, a sealing member may be provided on the circumference of the boss. Specifically, a snap-in groove may be provided on the circumference of the boss. Then, the sealing member is arranged in the snap-in groove. When the valve core 3 abuts against the orifice wall of the mounting hole 21 in the active cavity 111, the sealing member plays a sealing role. The sealing member may be provided as a sealing gasket, a sealing ring, a sealing strip, etc.

[0061] In this embodiment, if Figure 2 As shown, the base 1 includes a first module 14 and a second module 15 arranged opposite to each other in a horizontal direction, and the first module 14 and the second module 15 are connected to form the base. When the first module 14 and the second module 15 are separated, the accommodating cavity 11 inside the base 1 can be exposed, which is conducive to cleaning the inside of the accommodating cavity 11.

[0062] In summary, the embodiments of the present invention achieve the following technical effects:

[0063] A plurality of flow channels 112 are connected to the active cavity 111. On the one hand, the molten metal liquid can quickly enter the active cavity 111, thereby improving the response speed of closing the mounting hole 21 and preventing the molten metal liquid from entering the valve core seat 2 through the mounting hole 21 and then entering the vacuum valve through the exhaust hole 22; on the other hand, a large amount of molten metal liquid accumulates in the active cavity 111, thereby being able to generate sufficient thrust on the valve core 3, thereby enabling the valve core 3 to effectively abut against the orifice wall of the mounting hole 21 located in the active cavity 111, preventing the mounting hole 21 from being closed inadequately, and preventing the molten metal solution from entering the valve core seat 2 through the gap when the mounting hole 21 is not closed inadequately.

[0064] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0067] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pneumatic mechanical kinetic energy vacuum valve, characterized in that: include: The base comprises a receiving cavity, a flow channel opening and a mounting opening arranged at intervals on the wall of the receiving cavity, wherein the receiving cavity comprises a movable cavity connected to the mounting opening and a plurality of flow channels connected to the movable cavity, and the plurality of flow channels are connected to the flow channel opening; A valve core seat is sealed and connected to the mounting port and has a mounting hole and an air extraction hole, wherein the mounting hole passes through the valve core seat and one end of the mounting hole is located in the active cavity, and one end of the air extraction hole is connected to the interior of the mounting hole and the other end passes through the valve core seat and is located outside the base; The valve core is inserted into the mounting hole and can be driven to move along its axial direction, so that the first end of the valve core moves in the active cavity and the first end abuts against the orifice wall of one end of the mounting hole located in the active cavity to close the mounting hole.

2. The pneumatic mechanical kinetic energy vacuum valve according to claim 1, characterized in that: It also includes a driving unit and a fixing seat, wherein the driving unit is arranged on the fixing seat, and the telescopic part of the driving unit is connected with the valve core, so that when the telescopic part is driven to move, the valve core is driven to move along its axial direction.

3. The pneumatic mechanical kinetic energy vacuum valve according to claim 2, characterized in that: The driving unit is configured as a pneumatic driving mechanism, the telescopic portion is configured as a telescopic rod, and the telescopic rod is connected to the valve core in the axial direction of the valve core.

4. The pneumatic mechanical kinetic energy vacuum valve according to claim 2, characterized in that: The valve core seat is connected to the fixing seat and can be detachably connected relative to the wall of the installation opening.

5. The pneumatic mechanical kinetic energy vacuum valve according to claim 4, characterized in that: The fixing seat is also provided with a connecting portion for connecting with the piston rod of the oil cylinder.

6. The pneumatic mechanical kinetic energy vacuum valve according to claim 5, characterized in that: The connecting portion comprises a mounting hole arranged on a side of the fixing seat facing away from the base, and an internal thread is arranged on an inner wall of the mounting hole.

7. The pneumatic mechanical kinetic energy vacuum valve according to claim 1, characterized in that: It also includes a vacuum tube, one end of which is connected to the air extraction hole, and the other end of which is connected to a negative pressure system.

8. The pneumatic mechanical kinetic energy vacuum valve according to claim 1, characterized in that: The valve core comprises a valve core body and a flange arranged on the circumference of the valve core body. The valve core body has a first end located in the active cavity. The flange is arranged close to the first end of the valve core body and protrudes outwardly along the radial direction of the valve core body.

9. The pneumatic mechanical kinetic energy vacuum valve according to claim 8, characterized in that: The flange and the first end of the valve core body cooperate to form a boss, and the cross-sectional diameter of the boss gradually increases in the direction away from the first end of the valve core body. The orifice wall of the mounting hole at one end in the active cavity includes an abutment wall that abuts against the side wall of the boss.

10. The pneumatic mechanical kinetic energy vacuum valve according to claim 1, characterized in that: The base includes a first module and a second module that are arranged opposite to each other in a horizontal direction. The first module and the second module are connected to each other to form the base.

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