A vacuum valve assembly for vacuum die casting mold

Abstract

The invention discloses an exhaust valve assembly for a vacuum die-casting mold, comprising a valve body, a right-threaded sleeve, a water outlet pipe, a screw hole, a left-threaded sleeve, a water inlet pipe, an exhaust pipe, a mounting surface, a large sealing ring, a pressure diffuser, a mixing chamber, a vaporization valve, a small sealing ring, a throat, a check valve, an anti-rust layer, a steel layer and an anti-oxidation layer. The invention has the following beneficial effects: the anti-rust layer is made of zinc yellow anti-rust paint, which is convenient for preventing the device from rusting; the upper surface of the large sealing ring is placed in a groove provided on the lower surface of the mounting surface by being clamped, and is detachably connected thereto, which is convenient for improving the sealing of the device and preventing air from escaping; the outer surfaces of the left-threaded sleeve and the right-threaded sleeve are provided with concave-convex textures, which are convenient for increasing the friction between the outer surfaces of the left-threaded sleeve and the right-threaded sleeve and the hand, making it more convenient to screw; the anti-oxidation layer is made of zinc, which is convenient for preventing the inner surface of the valve body from being oxidized; there are four screw holes, which are evenly arranged on the mounting surface, which is convenient for the device to be firmly fixed on the mold.

Description

Technical Field

[0001] The invention relates to an air extraction valve assembly, in particular to an air extraction valve assembly for a vacuum die-casting mold, and belongs to the technical field of air extraction valves. Background Art

[0002] Vacuum die-casting is an advanced die-casting process that improves the mechanical properties and surface quality of die-castings by removing the gas in the die-casting mold cavity during the die-casting process to eliminate or significantly reduce the pores and dissolved gases in the die-castings. This method can improve the mechanical properties and surface quality of die-castings, improve plating performance, greatly reduce the back pressure of the cavity, and can use alloys with lower specific pressure and poor casting performance. It is possible to die-cast larger castings with small machines. This method improves the filling conditions and can die-cast thinner castings. Compared with ordinary die-casting methods, the production efficiency is almost the same.

[0003] To use this method, the air in the mold must be evacuated to achieve vacuum. Vacuum means the gas state in a given space that is lower than the atmospheric pressure. It is a physical phenomenon. Vacuum refers to the atmosphere. When part of the material in a specific space is discharged, its pressure is less than the standard atmospheric pressure. We generally call this space a vacuum or vacuum state.

[0004] In order to achieve vacuum inside the device, an exhaust valve must be used.

[0005] The existing air extraction valve assembly has a simple structure. First, it simply uses high-pressure water flow to take away the air without vaporizing it first, which is inefficient. Second, there is no anti-oxidation layer inside the valve body, which is not conducive to extending the service life of the device. Third, the sealing effect is poor and cannot prevent air from escaping. Summary of the invention

[0006] The object of the present invention is to provide an exhaust valve assembly for a vacuum die-casting mold in order to solve the above-mentioned problem.

[0007] The present invention achieves the above-mentioned purpose through the following technical scheme: an exhaust valve assembly for a vacuum die-casting mold, comprising a valve body, a right threaded sleeve, a water outlet pipe, a screw hole, a left threaded sleeve, a water inlet pipe, an exhaust pipe, a mounting surface, a large sealing ring, a diffuser pipe, a mixing chamber, a vaporization valve, a small sealing ring, a throat, a check valve, an anti-rust layer, a steel layer and an anti-oxidation layer; the valve body, the water outlet pipe, the water inlet pipe and the exhaust pipe constitute the main structure of the device, the left end of the water outlet pipe is fixedly connected to the right end of the valve body by welding, and the right end is connected to the right threaded sleeve, the right end of the water inlet pipe is fixedly connected to the left end of the valve body by welding, and the left end is connected to the left threaded sleeve, and the top end of the exhaust pipe is fixedly connected to the bottom end of the valve body by welding Fixed connection, the bottom end is fixedly connected to the upper surface of the mounting surface by welding, a large sealing ring is arranged on the lower surface of the mounting surface, the screw hole is arranged on the mounting surface, small sealing rings are arranged on the right end of the outlet pipe and the left end of the inlet pipe, the vaporization valve is arranged in the valve body, and the left end is connected to the inlet pipe, the right side of the vaporization valve is a mixing chamber, the right side of the mixing chamber is a throat, the right side of the throat is a diffuser, the diffuser is connected to the outlet pipe, the check valve is arranged at the top end of the inner surface of the exhaust pipe, and is connected to the mixing chamber, the outer surface of the valve body is an anti-rust layer, the lower surface of the anti-rust layer is connected to the upper surface of the steel layer, and the lower surface of the steel layer is connected to the upper surface of the anti-oxidation layer.

[0008] Preferably, in order to prevent the device from rusting, the material of the anti-rust layer is zinc yellow anti-rust paint.

[0009] Preferably, in order to improve the sealing performance of the device, the upper surface of the large sealing ring is snapped into a groove provided on the lower surface of the mounting surface and is detachably connected thereto.

[0010] Preferably, in order to increase the friction between the outer surfaces of the left-threaded sleeve and the right-threaded sleeve and the hand, the outer surfaces of the left-threaded sleeve and the right-threaded sleeve are provided with concave-convex textures.

[0011] Preferably, in order to prevent the inner surface of the valve body from being oxidized, the material of the anti-oxidation layer is zinc.

[0012] Preferably, in order to enable the device to be firmly fixed on the mold, there are four screw holes evenly arranged on the mounting surface.

[0013] The beneficial effects of the present invention are as follows: the exhaust valve assembly for the vacuum die-casting mold is reasonably designed, the anti-rust layer is made of zinc yellow anti-rust paint, which is convenient for preventing the device from rusting and extending the service life of the device; the upper surface of the large sealing ring is clamped in a groove opened on the lower surface of the mounting surface and is detachably connected thereto, which is convenient for improving the sealing of the device and preventing air from escaping; the outer surfaces of the left-threaded sleeve and the right-threaded sleeve are provided with concave-convex textures, which are convenient for increasing the friction between the outer surfaces of the left-threaded sleeve and the right-threaded sleeve and the hand, making it more convenient to screw; the material of the anti-oxidation layer is zinc, which is convenient for preventing the inner surface of the valve body from being oxidized and preventing the device from being damaged; there are four screw holes, which are evenly arranged on the mounting surface, so that the device can be firmly fixed on the mold and prevented from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the valve body material structure of the present invention.

[0017] In the figure: 1, valve body, 2, right threaded sleeve, 3, water outlet pipe, 4, screw hole, 5, left threaded sleeve, 6, water inlet pipe, 7, exhaust pipe, 8, mounting surface, 9, large sealing ring, 10, diffuser pipe, 11, mixing chamber, 12, vaporizer valve, 13, small sealing ring, 14, throat, 15, check valve, 16, anti-rust layer, 17, steel layer and 18, anti-oxidation layer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 3, an exhaust valve assembly for a vacuum die-casting mold, comprising a valve body 1, a right threaded sleeve 2, a water outlet pipe 3, a screw hole 4, a left threaded sleeve 5, a water inlet pipe 6, an exhaust pipe 7, a mounting surface 8, a large sealing ring 9, a diffuser pipe 10, a mixing chamber 11, a vaporization valve 12, a small sealing ring 13, a throat 14, a check valve 15, an anti-rust layer 16, a steel layer 17 and an anti-oxidation layer 18; the valve body 1, the water outlet pipe 3, the water inlet pipe 6 and the exhaust pipe 7 constitute the main structure of the device, the left end of the water outlet pipe 3 is fixedly connected to the right end of the valve body 1 by welding, and the right end is connected to the right threaded sleeve 2, the right end of the water inlet pipe 6 is fixedly connected to the left end of the valve body 1 by welding, and the left end is connected to the left threaded sleeve 5, the top end of the exhaust pipe 7 is fixedly connected to the bottom end of the valve body 1 by welding, and the bottom end is connected by welding The valve body 1 is fixedly connected to the upper surface of the mounting surface 8, a large sealing ring 9 is provided on the lower surface of the mounting surface 8, the screw hole 4 is provided on the mounting surface 8, the right end of the water outlet pipe 3 and the left end of the water inlet pipe 6 are provided with a small sealing ring 13, the vaporization valve 12 is provided in the valve body 1, and the left end is connected to the water inlet pipe 6, the right side of the vaporization valve 12 is a mixing chamber 11, the right side of the mixing chamber 11 is a throat 14, the right side of the throat 14 is a diffuser 10, the diffuser 10 is connected to the water outlet pipe 3, the check valve 15 is provided at the top end of the inner surface of the exhaust pipe 7, and is connected to the mixing chamber 11, the outer surface of the valve body 1 is an anti-rust layer 16, the lower surface of the anti-rust layer 16 is connected to the upper surface of the steel layer 17, and the lower surface of the steel layer 17 is connected to the upper surface of the anti-oxidation layer 18.

[0020] The material of the anti-rust layer 16 is zinc yellow anti-rust paint, which is convenient for preventing the device from rusting and extending the service life of the device. The upper surface of the large sealing ring 9 is clamped in the groove opened on the lower surface of the mounting surface 8 and is detachably connected thereto, which is convenient for improving the sealing of the device and preventing air from escaping. The outer surfaces of the left-threaded sleeve 5 and the right-threaded sleeve 2 are provided with concave-convex textures, which are convenient for increasing the friction between the outer surfaces of the left-threaded sleeve 5 and the right-threaded sleeve 2 and the hand, making it more convenient to screw. The material of the anti-oxidation layer 18 is zinc, which is convenient for preventing the inner surface of the valve body 1 from being oxidized and preventing the device from being damaged. There are four screw holes 4, which are evenly arranged on the mounting surface 8, so that the device can be firmly fixed on the mold and prevent the device from falling off.

[0021] Working principle: When using the exhaust valve assembly for vacuum die-casting molds, first install the mounting surface 8 on the mold through the screw hole 4, connect the water inlet pipe 6 to the high-pressure water pipe, and tighten the left threaded sleeve 5, connect the water outlet pipe 3 to the waste water pipe, and tighten the right threaded sleeve 2, inject high-pressure water into the water inlet pipe 6, and the water flow is vaporized into steam mist after passing through the vaporization valve 12, and then sprayed at high speed, driving the air flow in the exhaust pipe 7 to extract the air in the mold, and arrange the device through the throat 14 and the diffuser 10. The check valve 15 can prevent gas reflux. After use, disconnect the water outlet pipe 3 and the water inlet pipe 6 from the external pipeline.

[0022] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0023] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An exhaust valve assembly for a vacuum die-casting mold, characterized in that: The invention comprises a valve body (1), a right-hand threaded sleeve (2), a water outlet pipe (3), a screw hole (4), a left-hand threaded sleeve (5), a water inlet pipe (6), an air extraction pipe (7), a mounting surface (8), a large sealing ring (9), a pressure diffuser pipe (10), a mixing chamber (11), a vaporizing valve (12), a small sealing ring (13), a throat pipe (14), a check valve (15), an anti-rust layer (16), a steel layer (17) and an anti-oxidation layer (18); the valve body (1), the water outlet pipe (3), the water inlet pipe (6), the air extraction pipe (7), the mounting surface (8), a large sealing ring (9), a pressure diffuser pipe (10), a mixing chamber (11), a vaporizing valve (12), a small sealing ring (13), a throat pipe (14), a check valve (15), an anti-rust layer (16), a steel layer (17) and an anti-oxidation layer (18); The pipe (6) and the air extraction pipe (7) constitute the main structure of the air extraction valve assembly. The left end of the water outlet pipe (3) is fixedly connected to the right end of the valve body (1) by welding, and the right end is connected to the right threaded sleeve (2). The right end of the water inlet pipe (6) is fixedly connected to the left end of the valve body (1) by welding, and the left end is connected to the left threaded sleeve (5). The top end of the air extraction pipe (7) is fixedly connected to the bottom end of the valve body (1) by welding, and the bottom end is connected to the mounting surface ( The upper surface of the mounting surface (8) is fixedly connected, a large sealing ring (9) is arranged on the lower surface of the mounting surface (8), the screw hole (4) is arranged on the mounting surface (8), a small sealing ring (13) is arranged at the right end of the water outlet pipe (3) and the left end of the water inlet pipe (6), the vaporizing valve (12) is arranged in the valve body (1), and the left end is connected to the water inlet pipe (6), the right side of the vaporizing valve (12) is a mixing chamber (11), and the right side of the mixing chamber (11) is a throat (14), the right side of the throat pipe (14) is a diffuser pipe (10), the diffuser pipe (10) is connected to the water outlet pipe (3), the check valve (15) is arranged at the top end of the inner surface of the exhaust pipe (7) and is connected to the mixing chamber (11), the outer surface of the valve body (1) is a rust-proof layer (16), the lower surface of the rust-proof layer (16) is connected to the upper surface of the steel layer (17), and the lower surface of the steel layer (17) is connected to the upper surface of the anti-oxidation layer (18).

2. The exhaust valve assembly for a vacuum die-casting mold according to claim 1, characterized in that: The material of the anti-rust layer (16) is zinc yellow anti-rust paint.

3. The exhaust valve assembly for a vacuum die-casting mold according to claim 1, characterized in that: The upper surface of the large sealing ring (9) is clamped into a groove formed on the lower surface of the mounting surface (8) and is detachably connected thereto.

4. The exhaust valve assembly for a vacuum die-casting mold according to claim 1, characterized in that: The outer surfaces of the left-hand threaded sleeve (5) and the right-hand threaded sleeve (2) are provided with concave-convex textures.

5. The exhaust valve assembly for a vacuum die-casting mold according to claim 1, characterized in that: The material of the anti-oxidation layer (18) is zinc.

6. The exhaust valve assembly for a vacuum die-casting mold according to claim 1, characterized in that: There are four screw holes (4) which are evenly arranged on the mounting surface (8).

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