Triangular pneumatic wax injection valve

Abstract

The utility model relates to the technical field of valve bodies, and particularly discloses a triangular pneumatic wax injection valve which comprises a valve seat, a first pneumatic valve, a second pneumatic valve and a wax injection nozzle are respectively installed on the valve seat, and the wax injection nozzle is respectively communicated with the first pneumatic valve and the second pneumatic valve through connecting channels. Each of the first pneumatic valve and the second pneumatic valve comprises an air cylinder, an air cylinder shaft of each air cylinder is connected with an elastic piston rod assembly, and an end socket is arranged at the tail end of each elastic piston rod assembly, so that the end sockets open or block a connecting channel communicated with the wax injection nozzle; according to the triangular pneumatic wax injection valve, the pneumatic valve structure is adopted, the phenomenon that the wax injection valve fails due to the high temperature of the first pneumatic valve and the second pneumatic valve can be prevented, the air cylinder shaft of the air cylinder drives the sealing head through the elastic piston rod assembly, and therefore the sealing head can block a connecting channel communicated with the wax injection nozzle more rapidly, and the response is faster.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, and specifically, it is a triangular pneumatic wax injection valve. Background Art

[0002] The wax injection valve is an essential and important component in a wax injection machine. In the domestic market of vacuum wax injection machines at present, the valve body structure mostly adopts solenoid valves, and usually a vacuum extraction valve and a feeding valve are provided, and these two valves are relatively close to each other. And the wax material needs to be heated and melted into a liquid state to carry out wax injection. The temperature of the valve seat is relatively high, and the temperature of the valve seat is easy to be transmitted to the solenoid valve, resulting in the temperature of the solenoid valve rising more easily, thereby causing the electromagnetic coil to be prone to failure and making the valve body ineffective. Content of the Utility Model

[0003] In order to overcome the defects existing in the prior art, the utility model provides a triangular pneumatic wax injection valve to solve the above problems.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a triangular pneumatic wax injection valve, including a valve seat, on which a first pneumatic valve, a second pneumatic valve and a wax injection nozzle are respectively installed. The wax injection nozzle is respectively communicated with the first pneumatic valve and the second pneumatic valve through a connection channel. Both the first pneumatic valve and the second pneumatic valve include a cylinder, and an elastic piston rod assembly is connected to the cylinder shaft of the cylinder. A head is arranged at the end of the elastic piston rod assembly to open or block the connection channel communicated with the wax injection nozzle.

[0005] In the above-mentioned triangular pneumatic wax injection valve, the top view projection of the valve seat is triangular. A Y-shaped channel is arranged in the valve seat. A first installation valve groove and a second installation valve groove are respectively arranged on the left and right sides of the valve seat. An air hole and a material hole are respectively arranged at the upper end of the valve seat. The air hole is communicated with the first installation valve groove. The material hole is communicated with the second installation valve groove. The air hole is communicated with the first end of the Y-shaped channel. The material hole is communicated with the second end of the Y-shaped channel. The wax injection nozzle is communicated with the third end of the Y-shaped channel.

[0006] In the above-mentioned triangular pneumatic wax injection valve, an installation plate is connected to the upper end of the valve seat. An air channel and a feeding channel are respectively opened in the installation plate. The air channel is communicated with the air hole. The feeding channel is communicated with the material hole.

[0007] In the above-mentioned triangular pneumatic wax injection valve, the cylinder is installed at one end of the cylinder support through a heat insulation pad. A connecting flange connected to the valve seat is installed at the other end of the cylinder support. A cylinder body is installed at the end of the cylinder support away from the cylinder. The elastic piston rod assembly is installed through the cylinder body, and the first pneumatic valve and the second pneumatic valve respectively extend the sealing head into the first installation valve groove and the second installation valve groove through the elastic piston rod assembly.

[0008] In the above-mentioned triangular pneumatic wax injection valve, each elastic piston rod assembly includes a piston head installed through the cylinder body. One end of the piston head close to the cylinder is provided with a connecting rod, and the other end is provided with a piston rod. The sealing head is installed at the end of the piston rod. A spring is sleeved on the connecting rod. One end of the spring abuts against the inner wall of the cylinder body, and the other end abuts against the piston head.

[0009] In the above-mentioned triangular pneumatic wax injection valve, a connecting screw is threadedly connected to the cylinder shaft of the cylinder, and the end of the connecting screw away from the cylinder shaft is connected to the connecting rod.

[0010] In the above-mentioned triangular pneumatic wax injection valve, the heat insulation pad is a mica heat insulation pad.

[0011] The beneficial effects of the present utility model are as follows: By adopting a pneumatic valve structure, it is possible to prevent the phenomenon that the first pneumatic valve and the second pneumatic valve fail due to high temperature. Moreover, the cylinder shaft of the cylinder of the present utility model drives the sealing head through the elastic piston rod assembly, so that the sealing head seals the connection channel communicating with the wax injection nozzle more quickly and has a faster response. Description of the Drawings

[0012] Figure 1 It is one of the three-dimensional structure diagrams of the triangular pneumatic wax injection valve of the present utility model.

[0013] Figure 2 It is the second three-dimensional structure diagram of the triangular pneumatic wax injection valve of the present utility model.

[0014] Figure 3 It is the three-dimensional structure diagram of the valve seat, the first pneumatic valve and the second pneumatic valve.

[0015] Figure 4 It is the three-dimensional structure diagram of the valve seat.

[0016] Figure 5 It is the three-dimensional structure diagram of the first pneumatic valve.

[0017] Figure 6 It is the internal structure diagram of the first pneumatic valve.

[0018] In the figure: mounting plate 1, valve seat 2, first pneumatic valve 3, second pneumatic valve 4, air passage 5, feed passage 6, wax injection nozzle 7, air hole 8, material hole 9, first mounting valve groove 10, second mounting valve groove 11, cylinder support 12, heat insulation pad 13, cylinder 14, cylinder body 15, elastic piston rod assembly 16, piston rod 17, head 18, connecting flange 19, piston head 20, connecting rod 21, spring 22, connecting screw 23. Detailed implementation mode

[0019] The following further describes the detailed implementation mode of the present utility model with reference to the accompanying drawings. It should be noted here that the description of these implementation modes is for helping to understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various implementation modes of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] Combined with Figures 1 to 6 A triangular pneumatic wax injection valve shown in the figure includes a valve seat 2. A first pneumatic valve 3, a second pneumatic valve 4 and a wax injection nozzle 7 are respectively installed on the valve seat 2. The wax injection nozzle 7 is respectively communicated with the first pneumatic valve 3 and the second pneumatic valve 4 through a connecting passage. Both the first pneumatic valve 3 and the second pneumatic valve 4 include a cylinder 14. An elastic piston rod assembly 16 is connected to the cylinder shaft of the cylinder 14. A head 18 is arranged at the end of the elastic piston rod assembly 16 to open or block the connecting passage communicated with the wax injection nozzle 7. In this embodiment, by adopting a pneumatic valve structure, it is possible to prevent the first pneumatic valve 3 and the second pneumatic valve 4 from malfunctioning due to high temperature. Moreover, the cylinder shaft of the cylinder 14 of the present utility model drives the head 18 through the elastic piston rod assembly 16, so that when the head 18 blocks the connecting passage communicated with the wax injection nozzle 7, it is faster and the response is faster.

[0021] In this embodiment, the top view projection of the valve seat 2 is triangular. A Y-shaped passage is arranged in the valve seat 2. A first mounting valve groove 10 and a second mounting valve groove 11 are respectively arranged on the left and right sides of the valve seat 2. An air hole 8 and a material hole 9 are respectively arranged at the upper end of the valve seat 2. The air hole 8 is communicated with the first mounting valve groove 10. The material hole 9 is communicated with the second mounting valve groove 11. The air hole 8 is communicated with the first end of the Y-shaped passage. The material hole 9 is communicated with the second end of the Y-shaped passage. The wax injection nozzle 7 is communicated with the third end of the Y-shaped passage.

[0022] Before wax injection in this embodiment, the second pneumatic valve 4 first closes the communication port between the material hole 9 and the Y-shaped channel, and the first pneumatic valve 3 opens the communication port between the air hole 8 and the Y-shaped channel, so as to evacuate the air. When the vacuum reaches the condition for wax injection, the first pneumatic valve 3 quickly closes the communication port between the air hole 8 and the Y-shaped channel, and at the same time the second pneumatic valve 4 opens the communication port between the material hole 9 and the Y-shaped channel to complete the wax injection. Since the top view projection of the valve seat 2 is triangular, the distance between the first pneumatic valve 3 and the second pneumatic valve 4 is relatively far apart, preventing heat accumulation and having relatively fast heat dissipation.

[0023] An installation plate 1 is connected to the upper end of the valve seat 2 in this embodiment. An air channel 5 and a feed channel 6 are respectively opened in the installation plate 1. The air channel 5 is communicated with the air hole 8, and the feed channel 6 is communicated with the material hole 9. Through the installation plate 1, it is convenient to install the valve seat 2, the first pneumatic valve 3 and the second pneumatic valve 4 on the wax injection machine, and it is also convenient to communicate the air channel 5 and the feed channel 6 through the installation plate 1.

[0024] In this embodiment, the cylinder 14 is installed at one end of the cylinder support 12 through a heat insulation pad 13. A connecting flange 19 connected to the valve seat 2 is installed at the other end of the cylinder support 12. Among them, the heat insulation pad 13 is a mica heat insulation pad. A cylinder body 15 is installed at the end of the cylinder support 12 far from the cylinder 14. The elastic piston rod assembly 16 is installed through the cylinder body 15, and the first pneumatic valve 3 and the second pneumatic valve 4 respectively extend the sealing head 18 into the first installation valve groove 10 and the second installation valve groove 11 through the elastic piston rod assembly 16. A cylinder support 12 is arranged between the cylinder 14 and the connecting flange 19, so that the cylinder body of the cylinder 14 and the valve seat 2 will not be in direct contact, and the heat dissipation effect is effectively improved, preventing heat from being directly transferred from the valve seat 2 to the cylinder 14. Moreover, the elastic piston rod assembly 16 in this embodiment is elastically arranged in the cylinder body 15, so that when the cylinder 14 drives the elastic piston rod assembly 16, the reaction speed can be increased under the action of elasticity, thereby improving the wax injection efficiency.

[0025] Specifically, the elastic piston rod assembly 16 in this embodiment includes a piston head 20 installed through the cylinder body 15. One end of the piston head 20 close to the cylinder 14 is provided with a connecting rod 21, and the other end is provided with a piston rod 17. The sealing head 18 is installed at the end of the piston rod 17. A spring 22 is sleeved on the connecting rod 21. One end of the spring 22 abuts against the inner wall of the cylinder body 15, and the other end abuts against the piston head 20. When the cylinder 14 drives the piston head 20 to move in the cylinder body 15 and open the relevant connection ports, the spring 22 is compressed and stores energy. When it is necessary to quickly close the relevant connection ports, the cylinder 14 pushes the piston head 20, and at the same time the spring 22 resets and releases energy, so that the piston head 20 quickly pushes.

[0026] It is also worth noting that a connecting screw rod 23 is threadedly connected to the cylinder shaft of the cylinder 14 in this embodiment, and one end of the connecting screw rod 23 away from the cylinder shaft is connected to the connecting rod 21. By adjusting the distance between the connecting screw rod 23 and the cylinder shaft, the compression of the spring 22 can be adjusted accordingly.

[0027] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present utility model.

Claims

1. A triangular pneumatic wax injection valve, comprising a valve seat (2), characterized in that, A first pneumatic valve (3), a second pneumatic valve (4) and a wax injection nozzle (7) are respectively installed on the valve seat (2). The wax injection nozzle (7) is communicated with the first pneumatic valve (3) and the second pneumatic valve (4) through a connecting channel. Both the first pneumatic valve (3) and the second pneumatic valve (4) include a cylinder (14). An elastic piston rod assembly (16) is connected to the cylinder shaft of the cylinder (14). A head (18) is arranged at the end of the elastic piston rod assembly (16) so that the head (18) opens or blocks the connecting channel communicated with the wax injection nozzle (7).

2. The triangular pneumatic wax injection valve according to claim 1, wherein, The top view projection of the valve seat (2) is triangular. A Y-shaped channel is arranged in the valve seat (2). A first installation valve groove (10) and a second installation valve groove (11) are respectively arranged on the left and right sides of the valve seat (2). Air holes (8) and material holes (9) are respectively arranged at the upper end of the valve seat (2). The air holes (8) are communicated with the first installation valve groove (10). The material holes (9) are communicated with the second installation valve groove (11). The air holes (8) are communicated with the first end of the Y-shaped channel. The material holes (9) are communicated with the second end of the Y-shaped channel. The wax injection nozzle (7) is communicated with the third end of the Y-shaped channel.

3. The triangular pneumatic wax injection valve according to claim 2, characterized in that, An installation plate (1) is connected to the upper end of the valve seat (2). An air channel (5) and a feed channel (6) are respectively arranged in the installation plate (1). The air channel (5) is communicated with the air holes (8). The feed channel (6) is communicated with the material holes (9).

4. The triangular pneumatic wax injection valve according to claim 2, characterized in that, The cylinder (14) is installed on one end of a cylinder support (12) through a heat insulation pad (13). A connecting flange (19) connected to the valve seat (2) is installed at the other end of the cylinder support (12). A cylinder body (15) is installed at the end of the cylinder support (12) far from the cylinder (14). The elastic piston rod assembly (16) is installed through the cylinder body (15). And the first pneumatic valve (3) and the second pneumatic valve (4) respectively extend the head (18) into the first installation valve groove (10) and the second installation valve groove (11) through the elastic piston rod assembly (16).

5. The triangular pneumatic wax injection valve according to claim 4, characterized in that, Each elastic piston rod assembly (16) includes a piston head (20) installed through the cylinder body (15). A connecting rod (21) is arranged at one end of the piston head (20) close to the cylinder (14), and a piston rod (17) is arranged at the other end. The head (18) is installed at the end of the piston rod (17). A spring (22) is sleeved on the connecting rod (21). One end of the spring (22) abuts against the inner wall of the cylinder body (15), and the other end abuts against the piston head (20).

6. The triangular pneumatic wax injection valve according to claim 5, characterized in that, A connecting screw (23) is threadedly connected to the cylinder shaft of the cylinder (14). The end of the connecting screw (23) far from the cylinder shaft is connected to the connecting rod (21).

7. A triangular pneumatic wax injection valve according to claim 4, characterized in that, The heat insulation pad (13) is a mica heat insulation pad.

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