CN115342191A - Hydraulic vacuum valve - Google Patents

Abstract

The invention discloses a hydraulic vacuum valve, comprising a valve body mechanism and a driving mechanism, the valve body mechanism includes a valve seat and a valve core, the valve seat has a first hole, the first hole includes a first section and a second section, the first section It is used to connect the exhaust port of the mold. There is a second hole in the radial direction of the first section, and the second hole is used to communicate with the first section and the vacuum machine; the driving mechanism includes an outer convex ring arranged on the valve core, and the outer convex ring Located in the second section, the outer convex ring divides the second section into a first oil chamber and a second oil chamber, and also includes a first oil hole and a second oil hole, and the first oil hole is used to communicate with the first oil chamber and the outside Oil circuit, the second oil hole is used to connect the second oil chamber and the external oil circuit, the first oil chamber drives the valve core to isolate the first section and the second hole, the second oil chamber drives the valve core to open the first section and the second hole. The hydraulic vacuum valve of the present invention can shorten the closing time of the hydraulic vacuum valve and reduce the risk of molten metal entering the hydraulic vacuum valve and blocking the hydraulic vacuum valve when filling the mold cavity.

Description

A hydraulic vacuum valve

technical field

The invention relates to the technical field of casting, in particular to a hydraulic vacuum valve.

Background technique

On die-casting equipment, the mold is usually equipped with an exhaust port, which is used to discharge the air squeezed out by the molten metal in the mold cavity. If the air in the cavity is not discharged in time, it will lead to sand hole defects in the product .

In order to reduce the sand hole defects of the product, when the molten metal does not fill the entire cavity, a vacuum machine is used to pump air from the exhaust port to assist the mold to discharge the air in the cavity.

In order to control the switch of the exhaust port, a hydraulic vacuum valve is usually arranged at the exhaust port, and the hydraulic vacuum valve is connected to the vacuum machine.

At present, the hydraulic vacuum valve includes a hydraulic cylinder structure and a valve body structure. The plunger rod of the hydraulic cylinder structure is connected to the valve stem of the valve body structure, so that the hydraulic mechanism can drive the switch of the valve body structure. In order to facilitate the hydraulic cylinder structure and the valve body structure Installation, usually there will be a movable gap in the connection between the plunger rod and the valve body, so as to avoid the plunger rod and the valve body from being stuck when installing the hydraulic cylinder structure and the valve body structure.

However, the closing time of the existing hydraulic vacuum valve is long, resulting in prolonged vacuuming time, which easily causes molten metal to enter the hydraulic vacuum valve to block the hydraulic vacuum valve when filling the cavity.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention proposes a hydraulic vacuum valve, which can shorten the closing time of the hydraulic vacuum valve and reduce the risk of molten metal entering the hydraulic vacuum valve and blocking the hydraulic vacuum valve when filling the cavity.

A hydraulic vacuum valve according to an embodiment of the first aspect of the present invention includes: a valve body mechanism including a valve seat and a valve core, the valve seat has a first hole, and the first hole includes a coaxial first section And the second section, the first section is used to connect the exhaust port of the mold, the radial direction of the first section is provided with a second hole, and the second hole is used to communicate with the first section and the vacuum machine, The first section accommodates a part of the spool, the second section accommodates another part of the spool, and the spool moves back and forth in the first section to open or block the first section. section and the second hole; the driving mechanism includes an outer convex ring arranged on the valve core, the outer convex ring is located in the second section, and the outer convex ring separates the second section into The first oil chamber and the second oil chamber also include a first oil hole and a second oil hole, the first oil hole is used to communicate with the first oil chamber and the external oil circuit, and the second oil hole is used for The second oil chamber is connected with the external oil circuit, the oil entering the first oil chamber drives the valve core to isolate the first section and the second hole, and the oil entering the second oil chamber drives the valve A core opens the first section and the second aperture.

A hydraulic vacuum valve according to an embodiment of the present invention has at least the following beneficial effects:

1. The present invention uses a valve body mechanism, the valve body mechanism includes a valve seat, the valve seat has a first hole, the first hole includes a coaxial first section and a second section, and the first section is used for connecting The exhaust port of the mould, the radial direction of the first section is provided with a second hole, and the second hole is used to communicate with the first section and the vacuum machine, so that the vacuum machine can pass through the second hole and the first The first section of the hole is connected to the exhaust port, which is convenient for the vacuum machine to exhaust the mold cavity, assists the mold to discharge the air in the cavity, and reduces the sand hole defects of the product.

2. In the present invention, a spool is arranged in the valve body mechanism, the first section accommodates a part of the spool, the second section accommodates another part of the spool, and the spool is placed in the first section. It can be understood that when the spool cooperates with the first section to seal the first section, the spool can block the first section and the second hole. The connection of the hole, so that the hydraulic vacuum valve is convenient to isolate the vacuum machine and the mold cavity, avoiding the continuous pumping of the vacuum machine to the mold cavity, which will cause the molten metal in the mold cavity to flow into the hydraulic vacuum valve, and then reduce the blockage of the hydraulic vacuum valve Risk, on the contrary, when the valve core is far away from the first section of the opening, the first section and the second hole are connected, so that the hydraulic vacuum valve is convenient to connect the vacuum machine and the mold cavity, so that the vacuum machine can pump air to the mold cavity and assist the mold to discharge The air in the cavity reduces the sand hole defects of the product.

3. The present invention is provided with a driving mechanism, the driving mechanism includes an outer convex ring arranged on the valve core, the outer convex ring is located in the second section, and the outer convex ring divides the second section into The first oil chamber and the second oil chamber make the driving mechanism set in the valve seat, so that, on the one hand, the hydraulic vacuum valve can form an integrated structure. It needs to be explained that the integrated structure refers to the valve body mechanism and the driving mechanism Mutual fit and assembly form a detachable overall structure. Compared with the split structure in which the valve body structure and the hydraulic cylinder structure are separated, the hydraulic vacuum valve with the integrated structure takes up less space, and it is convenient to disassemble and integrate the entire hydraulic vacuum valve on the mold. Installation, compared with the hydraulic vacuum valve with split structure, which needs to be installed on the die-casting machine one by one or disassembled one by one on the die-casting machine, the hydraulic vacuum valve with one-piece structure can shorten the replacement time and increase the cost of replacing the hydraulic vacuum valve. efficiency.

On the other hand, by arranging the outer convex ring on the valve core, the valve core forms the sealing part of the valve body mechanism and the driving part of the driving mechanism. Rod connection, the hydraulic vacuum valve with one-piece structure saves the connection between the plunger rod and the valve stem, reduces the connection nodes between the plunger rod and the valve stem, thus reduces the connection between the plunger rod and the valve stem The gap reduces the transmission delay time between the hydraulic cylinder structure and the valve body structure, and shortens the closing reaction time of the hydraulic vacuum valve, thereby shortening the closing time of the hydraulic vacuum valve and reducing the risk of molten metal entering the hydraulic vacuum valve when filling the cavity .

4. The present invention sets a first oil hole and a second oil hole, the first oil hole is used to communicate with the first oil chamber and the external oil circuit, and the second oil hole is used to communicate with the second oil hole chamber and external oil passage, the first oil chamber drives the valve core to block the first section and the second hole, the second oil chamber drives the valve core to open the first segment and the second hole, so that the first oil chamber and the second oil chamber can be connected to the external oil circuit, and then, the external oil circuit provides power for driving the spool to move.

According to some embodiments of the present invention, the valve core is covered with a spring, the spring is located in the first oil chamber, and the spring is used to drive the outer convex ring close to the second oil chamber.

According to some embodiments of the present invention, the valve seat includes a first seat body and a second seat body that are detachably connected, the first segment is disposed on the first seat body, and the second segment is disposed on the first seat body. on the second base.

According to some embodiments of the present invention, a first end cover is provided between the first section and the second section, and the first end cover is sleeved on the outside of the valve core, and the first end cover and the The first oil cavity is formed between the outer convex rings.

According to some embodiments of the present invention, the outer surface of the first end cap is covered with a first sealing ring, the first sealing ring is located between the first section and the second section, and the first sealing ring The ring is used to seal the outer surface of the first end cap, the gap between the first seat body and the second seat body.

According to some embodiments of the present invention, both the first oil hole and the second oil hole are arranged on the second seat body, and the second seat body also has a third oil hole, and the third oil hole The first oil hole and the second oil hole are connected, and a relief valve is arranged in the third oil hole, and the relief valve can discharge the oil in the first oil hole to the second oil hole. oil hole.

According to some embodiments of the present invention, the end of the second segment away from the first segment is provided with a second end cap, the second end cap is sleeved on the valve core, and the outer convex ring and the The second oil cavity is formed between the second end covers.

According to some embodiments of the present invention, the outer surface of the second end cover is covered with a second sealing ring, and the second sealing ring is used to seal the gap between the second end cover and the second base .

According to some embodiments of the present invention, the first section has a sealing portion, the sealing portion is located on the side of the second hole away from the second section, and the inner diameter of the sealing portion is along the The direction of the spool gradually increases, the valve core has a fitting portion, the outer diameter of the fitting portion gradually increases in a direction away from the second section, and the sealing portion fits and seals against the fitting portion.

According to some embodiments of the present invention, the first oil chamber is located between the second oil chamber and the second hole, and the end of the valve core away from the first section can move to the second section In addition, the valve seat is also provided with a backstroke detector, and the backstroke detector abuts against the end of the valve core away from the first section to detect whether the valve core has moved to a proper position.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the structural representation of a kind of hydraulic vacuum valve of the embodiment of the present invention;

Fig. 2 is the plan view shown in Fig. 1;

Fig. 3 is A-A sectional view shown in Fig. 2;

Fig. 4 is a B-B sectional view shown in Fig. 2 .

Reference signs: 100-valve seat, 110-spool, 120-first hole, 130-first section, 140-second section, 150-second hole, 160-external convex ring, 170-first oil chamber , 180-the second oil chamber, 190-the first oil hole, 200-the second oil hole, 210-spring, 220-the first seat, 230-the second seat, 240-the first end cover, 250-the first A sealing ring, 260-third oil hole, 270-overflow valve, 280-second end cover, 290-second sealing ring, 300-sealing part, 310-cooperating part, 320-return detector.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, several means one or more, and multiple means two or more. Greater than, less than, exceeding, etc. are understood as not including the original number, and above, below, within, etc. are understood as including the original number. If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features relation.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

A hydraulic vacuum valve according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

Referring to Fig. 1 and Fig. 2, a hydraulic vacuum valve according to an embodiment of the present invention includes a valve body mechanism and a driving mechanism.

3 and 4, for the valve body mechanism, the valve body mechanism includes a valve seat 100 and a valve core 110, the valve seat 100 has a first hole 120, and the first hole 120 includes a coaxial first segment 130 and a second segment 140 , the first section 130 is used to connect the exhaust port of the mold, the first section 130 is provided with a second hole 150 in the radial direction, and the second hole 150 is used to communicate with the first section 130 and the vacuum machine.

This embodiment uses a valve body mechanism, the valve body mechanism includes a valve seat 100, the valve seat 100 has a first hole 120, the first hole 120 includes a coaxial first section 130 and a second section 140, the first section 130 is used for connecting The exhaust port of the mold, the radial direction of the first section 130 is provided with a second hole 150, the second hole 150 is used to communicate with the first section 130 and the vacuum machine, so that the vacuum machine can pass through the second hole 150 and the first hole The first section 130 of 120 is connected to the exhaust port, which is convenient for the vacuum machine to exhaust the mold cavity, assists the mold to discharge the air in the cavity, and reduces the sand hole defect of the product.

Further, the first section 130 accommodates a part of the valve core 110, the second section 140 accommodates another part of the valve core 110, and the valve core 110 moves back and forth in the first section 130 to open or isolate the first section 130 and the second section. hole 150.

In this embodiment, the spool 110 is provided in the valve body mechanism, the first section 130 accommodates a part of the spool 110, the second section 140 accommodates another part of the spool 110, and the spool 110 moves back and forth in the first section 130 to To open or block the first section 130 and the second hole 150, it can be understood that when the valve core 110 cooperates with the first section 130 to seal the first section 130, so that the valve core 110 can block the first section 130 and the second hole 150 In this way, the hydraulic vacuum valve is convenient to isolate the vacuum machine and the mold cavity, avoiding the continuous pumping of the vacuum machine to the mold cavity and causing the molten metal in the mold cavity to flow into the hydraulic vacuum valve, thereby reducing the risk of blockage of the hydraulic vacuum valve , On the contrary, when the spool 110 is away from the open first section 130, so that the first section 130 communicates with the second hole 150, thereby facilitating the hydraulic vacuum valve to communicate with the vacuum machine and the mold cavity, so that the vacuum machine pumps air to the mold cavity, Assist the mold to discharge the air in the cavity and reduce the sand hole defects of the product.

In some specific embodiments, the valve seat 100 includes a first seat body 220 and a second seat body 230 that are detachably connected, the first segment 130 is disposed on the first seat body 220, and the second segment 140 is disposed on the second seat body. body 230, so that, on the one hand, it facilitates the processing of the valve seat 100;

Specifically, bolts are used to connect the first seat body 220 and the second seat body 230 .

In other embodiments, the valve seat 100 can also be integrally formed.

For the driving mechanism, the driving mechanism includes an outer convex ring 160 arranged on the spool 110, the outer convex ring 160 is located in the second section 140, and the outer convex ring 160 separates the second section 140 into a first oil chamber 170 and a second oil chamber 170. Cavity 180.

In this embodiment, a driving mechanism is provided. The driving mechanism includes an outer convex ring 160 arranged on the valve core 110. The outer convex ring 160 is located in the second segment 140. The outer convex ring 160 divides the second segment 140 into a first oil chamber 170. and the second oil chamber 180, so that the driving mechanism is arranged in the valve seat 100, so that, on the one hand, the hydraulic vacuum valve can form an integrated structure. It should be explained that the integrated structure means that the valve body mechanism and the driving mechanism are attached to each other. Compared with the split structure in which the valve body structure and the hydraulic cylinder structure are separated, the hydraulic vacuum valve with the integrated structure takes up less space, and it is convenient to disassemble and install the entire hydraulic vacuum valve on the mold. Compared with the hydraulic vacuum valve of the split structure, which needs to be installed on the die-casting machine one by one or disassembled one by one on the die-casting machine, the hydraulic vacuum valve of the one-piece structure can shorten the replacement time and improve the replacement of the hydraulic vacuum valve. Efficiency.

On the other hand, by arranging the outer convex ring 160 on the valve core 110, the valve core 110 forms the sealing part of the valve body mechanism and the driving part of the driving mechanism. Connected with the plunger rod, the hydraulic vacuum valve with an integrated structure saves the connection between the plunger rod and the valve stem, reduces the connection nodes between the plunger rod and the valve stem, and thus reduces the distance between the plunger rod and the valve stem. The connection gap between them reduces the transmission delay time between the hydraulic cylinder structure and the valve body structure, and shortens the closing reaction time of the hydraulic vacuum valve, thereby shortening the closing time of the hydraulic vacuum valve and reducing the hydraulic vacuum when the molten metal fills the cavity. valve risk.

Further, it also includes a first oil hole 190 and a second oil hole 200, the first oil hole 190 is used to communicate with the first oil chamber 170 and the external oil circuit, and the second oil hole 200 is used to communicate with the second oil chamber 180 and the external In the oil circuit, oil entering the first oil chamber 170 drives the spool 110 to block the first section 130 and the second hole 150 , and oil entering the second oil chamber 180 drives the spool 110 to open the first section 130 and the second hole 150 .

In this embodiment, the first oil hole 190 and the second oil hole 200 are provided. The first oil hole 190 is used to communicate with the first oil chamber 170 and the external oil circuit, and the second oil hole 200 is used to communicate with the second oil chamber 180 and the external oil circuit. In the oil circuit, the first oil chamber 170 drives the spool 110 to block the first section 130 and the second hole 150, and the second oil chamber 180 drives the spool 110 to open the first section 130 and the second hole 150, thus, the first The first oil chamber 170 and the second oil chamber 180 can be connected to an external oil circuit, and further, the external oil circuit provides power for driving the spool 110 to move.

In some specific embodiments, the valve core 110 is sleeved with a spring 210 , the spring 210 is located in the first oil chamber 170 , and the spring 210 is used to drive the outer convex ring 160 close to the second oil chamber 180 .

It can be understood that the external oil circuit is provided with a control valve, and the external oil circuit can be controlled to supply or extract oil to the first oil chamber 170 and the second oil chamber 180 through the control valve. When the hydraulic vacuum valve is closed, the control valve first Control the external oil circuit to pump oil to the second oil chamber 180, so that the second oil chamber 180 has a space that allows the outer convex ring 160 to move, and then the control valve controls the external oil circuit to supply oil to the first oil chamber 170, so that the first oil chamber The oil at 170 pushes the outer convex ring 160 to move toward the second oil chamber 180, so that the spool 110 seals the communication between the first section 130 and the second hole 150, however, the second oil chamber 180 drains oil and the first oil chamber 170 enters oil There will be a switching time gap between them, that is, while the second oil chamber 180 discharges the hydraulic oil, it takes a certain time for the hydraulic oil in the external oil circuit to reach the first oil chamber 170, causing the action of the spool 110 to be delayed, making the hydraulic vacuum valve Close time is long.

In this embodiment, a spring 210 is provided in the first oil chamber 170, and the spring 210 is used to drive the outer convex ring 160 close to the second oil chamber 180, so that the hydraulic oil is discharged from the second oil chamber 180 and the hydraulic oil does not reach the first oil chamber. During the period of 170, the spring 210 can drive the outer convex ring 160 to move to the second oil chamber 180, thereby speeding up the reaction speed of the outer convex ring 160 moving to the second oil chamber 180, and further shortening the closing time of the hydraulic vacuum valve. Reduces the risk of molten metal entering the hydraulic vacuum valve when filling the cavity.

In some specific embodiments, a first end cap 240 is provided between the first section 130 and the second section 140, the first end cap 240 is sleeved on the outside of the valve core 110, and the first end cap 240 and the outer convex ring 160 A first oil chamber 170 is formed between them, so that the first end cover 240 and the second seat body 230 can be disassembled, and then, the outer convex ring 160 of the valve core 110 can be easily installed into the second segment 140 .

Further, the outer surface of the first end cover 240 is covered with a first sealing ring 250, the first sealing ring 250 is located between the first section 130 and the second section 140, the first sealing ring 250 is used to seal the first end cover 240 The gap between the outer surface of the first end cover 240, the first seat 220 and the second seat 230, thereby preventing the hydraulic oil in the first oil chamber 170 from the outer surface of the first end cover 240, the first seat 220 and the second seat The gap between the bodies 230 leaks, thereby making the sealing performance of the first oil chamber 170 better.

Further, a first oil seal is provided on the inner surface of the first end cover 240 , and the first oil seal contacts and seals against the outer surface of the valve core 110 .

In some specific embodiments, both the first oil hole 190 and the second oil hole 200 are arranged on the second base body 230, and the second base body 230 also has a third oil hole 260, and the third oil hole 260 communicates with the first oil hole. A relief valve 270 is disposed in the hole 190 , the second oil hole 200 , and the third oil hole 260 , and the relief valve 270 can discharge the oil in the first oil hole 190 to the second oil hole 200 .

It can be understood that since the first seat body 220 is close to the mold, the heat of the mold is easily transferred to the first seat body 220, resulting in a high temperature of the first seat body 220, and the first sealing ring 250 is in contact with the first seat body 220, resulting in The temperature of the first sealing ring 250 is high, which causes the life of the first sealing ring 250 to be low. In this embodiment, the third oil hole 260 is provided on the second base body 230, and the third oil hole 260 communicates with the first oil hole 190 and the second oil hole 190. The oil hole 200, the third oil hole 260 is provided with a relief valve 270, the relief valve 270 can discharge the oil in the first oil hole 190 to the second oil hole 200, so that the oil in the first oil hole 190 can circulate flow, so that the oil in the first oil hole 190 can cool the second seat body 230, and then the second seat body 230 cools the first sealing ring 250, thereby improving the service life of the first sealing ring 250. The position of the first oil hole 190 is closer to the first seal ring 250 than the position of the second oil hole 200 , thereby improving the cooling effect of the oil in the first oil hole 190 on the first seal ring 250 .

In some specific embodiments, the end of the second section 140 away from the first section 130 is provided with a second end cap 280 , the second end cap 280 is sleeved on the outside of the valve core 110 , and the outer convex ring 160 and the second end cap 280 A second oil chamber 180 is formed between them, so that the second end cover 280 and the second seat body 230 can be disassembled, and then, the outer convex ring 160 of the valve core 110 can be easily installed into the second segment 140 .

Further, the outer surface of the second end cover 280 is covered with a second sealing ring 290, and the second sealing ring 290 is used to seal the gap between the second end cover 280 and the second seat body 230, thereby preventing the second oil chamber from The hydraulic oil at 180 leaks from the gap between the second seat body 230 on the outer surface of the second end cover 280 , thereby making the second oil chamber 180 better sealed.

Further, the inner surface of the second end cover 280 is provided with a second oil seal, and the second oil seal abuts and seals against the outer surface of the valve core 110 .

In some specific embodiments, the first section 130 has a sealing portion 300 , the sealing portion 300 is located on the side of the second hole 150 away from the second section 140 , and the inner diameter of the sealing portion 300 gradually increases along the direction away from the second section 140 The spool 110 has a fitting portion 310, the outer diameter of the fitting portion 310 gradually increases along the direction away from the second section 140, the sealing portion 300 is fitted and sealed with the fitting portion 310, so that when the fitting portion 310 is close to the sealing portion 300, The contact between the matching part 310 and the sealing part 300 is more closely, and further, the sealing effect between the matching part 310 and the sealing part 300 is better.

In some specific embodiments, the first oil chamber 170 is located between the second oil chamber 180 and the second hole 150 , the end of the valve core 110 away from the first segment 130 can move to the outside of the second segment 140 , and the valve seat 100 A backstroke detector 320 is also provided, and the backstroke detector 320 abuts against the end of the spool 110 far away from the first section 130 to detect whether the spool 110 has moved in place, so as to facilitate monitoring whether the hydraulic vacuum valve is closed in place, and then avoid hydraulic vacuum valves. Inadequate closure allowing molten metal to enter the hydraulic vacuum valve.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the technical field, various modifications can be made without departing from the gist of the present invention. kind of change.

Claims (10)

1. A hydraulic vacuum valve, characterized in that, comprising: The valve body mechanism includes a valve seat (100) and a valve core (110), the valve seat (100) has a first hole (120), and the first hole (120) includes a coaxial first section (130) And the second section (140), the first section (130) is used to connect the exhaust port of the mould, the radial direction of the first section (130) is provided with a second hole (150), and the second hole (150) is used to communicate with the first section (130) and the vacuum machine, the first section (130) accommodates a part of the valve core (110), and the second section (140) accommodates the another part of the spool (110), said spool (110) moving back and forth in said first section (130) to open or block said first section (130) and said second hole (150); The driving mechanism includes an outer convex ring (160) arranged on the valve core (110), the outer convex ring (160) is located in the second section (140), and the outer convex ring (160) will The second section (140) is divided into a first oil chamber (170) and a second oil chamber (180), and also includes a first oil hole (190) and a second oil hole (200), the first oil hole (190) is used to connect the first oil chamber (170) and the external oil passage, the second oil hole (200) is used to communicate the second oil chamber (180) and the external oil passage, the first The oil intake of the oil chamber (170) drives the valve core (110) to isolate the first section (130) and the second hole (150), and the oil intake of the second oil chamber (180) drives the valve core (110) opening said first section (130) and said second hole (150). 2. A hydraulic vacuum valve according to claim 1, characterized in that, the valve core (110) is sleeved with a spring (210), and the spring (210) is located in the first oil chamber (170) , the spring (210) is used to drive the outer convex ring (160) close to the second oil chamber (180). 3. A hydraulic vacuum valve according to claim 1, characterized in that, the valve seat (100) comprises a first seat body (220) and a second seat body (230) detachably connected, and the first seat body (230) is detachably connected. A section (130) is arranged on the first seat (220), and the second section (140) is arranged on the second seat (230). 4. A hydraulic vacuum valve according to claim 3, characterized in that a first end cap (240) is arranged between the first section (130) and the second section (140), and the The first end cover (240) is sleeved on the outside of the valve core (110), and the first oil chamber (170) is formed between the first end cover (240) and the outer convex ring (160). 5. A hydraulic vacuum valve according to claim 4, characterized in that a first sealing ring (250) is sleeved on the outer surface of the first end cover (240), and the first sealing ring (250) Located between the first section (130) and the second section (140), the first sealing ring (250) is used to seal the outer surface of the first end cover (240), the first seat (220) and the gap between the second base (230). 6. A hydraulic vacuum valve according to claim 5, characterized in that, both the first oil hole (190) and the second oil hole (200) are arranged on the second seat body (230) , the second seat body (230) also has a third oil hole (260), and the third oil hole (260) communicates with the first oil hole (190) and the second oil hole (200), A relief valve (270) is arranged in the third oil hole (260), and the relief valve (270) can discharge the oil in the first oil hole (190) to the second oil hole ( 200). 7. A hydraulic vacuum valve according to claim 3, characterized in that, the end of the second section (140) away from the first section (130) is provided with a second end cap (280), the The second end cover (280) is sleeved on the outside of the valve core (110), and the second oil chamber (180) is formed between the outer convex ring (160) and the second end cover (280). 8. A hydraulic vacuum valve according to claim 7, characterized in that, a second sealing ring (290) is sleeved on the outer surface of the second end cover (280), and the second sealing ring (290) It is used for sealing the gap between the second end cover (280) and the second seat body (230). 9. A hydraulic vacuum valve according to claim 1, characterized in that, the first section (130) has a sealing portion (300), and the sealing portion (300) is located in the second hole (150) On the side away from the second section (140), the inner diameter of the sealing part (300) gradually increases along the direction away from the second section (140), and the valve core (110) has a matching part (310 ), the outer diameter of the matching portion (310) gradually increases along the direction away from the second section (140), and the sealing portion (300) is fitted and sealed with the matching portion (310). 10. A hydraulic vacuum valve according to claim 1, characterized in that, the first oil chamber (170) is located between the second oil chamber (180) and the second hole (150), The end of the valve core (110) away from the first section (130) can move out of the second section (140), and the valve seat (100) is also provided with a backstroke detector (320), so The return stroke detector (320) abuts against the end of the spool (110) away from the first section (130) to detect whether the spool (110) has moved to a position.

Images