Control valve assembly for vacuum resistance furnace

Abstract

The utility model discloses a control valve assembly for a vacuum resistance furnace, which comprises a furnace body, the upper end of the furnace body is provided with a vacuum pump, the air inlet end of the vacuum pump extends into the furnace body, the left side of the furnace body is fixedly connected with a connecting plate, and the upper end of the connecting plate is fixedly connected with a piston cylinder. The left side of the piston barrel communicates with a nitrogen inlet pipe, an air inlet hole is formed in the inner wall of the left side of the piston barrel, the inner wall of the right side of the piston barrel communicates with a first connecting pipe and a second connecting pipe, and the other end of the first connecting pipe and the other end of the second connecting pipe communicate with the interior of the furnace body. And the adjusting mechanism comprises a piston column which is connected to the interior of the piston cylinder in a sliding manner. The control valve assembly can supply nitrogen, prevent oxidation reaction, increase the strength of the high-pressure container and promote uniform heating, in addition, an adjustable mechanism is further arranged, subsequent internal high-temperature waste gas discharge is facilitated, and the comfort degree of actual use is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves for resistance furnaces, in particular to a control valve assembly for a vacuum resistance furnace. Background Art

[0002] The working principle of a vacuum resistance furnace is mainly to use the heat generated when an electric current passes through a resistor body (such as a resistance wire or a resistance strip) to heat the workpiece. In a vacuum environment, since the number of gas molecules is greatly reduced, the ways of heat conduction and heat convection are inhibited, thereby reducing heat loss and improving heating efficiency. At the same time, the vacuum environment can effectively prevent the workpiece from being oxidized or polluted at high temperatures;

[0003] After the existing vacuum resistance furnace is used up, there will be a relatively high temperature remaining inside, which causes a large amount of hot air to overflow after the user opens the furnace door, making the user feel uncomfortable, and the actual use comfort needs to be improved. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to propose a control valve assembly for a vacuum resistance furnace. This control valve assembly can introduce nitrogen gas to prevent oxidation reactions, increase the strength of high-pressure containers, and promote uniform heating. In addition, an adjustable mechanism is provided to facilitate the subsequent discharge of high-temperature waste gas inside, improving the actual use comfort.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A control valve assembly for a vacuum resistance furnace, including a furnace body, a vacuum pump is installed at the upper end of the furnace body, the intake end of the vacuum pump extends into the furnace body, a connecting plate is fixedly connected to the left side of the furnace body, a piston cylinder is fixedly connected to the upper end of the connecting plate, a nitrogen inlet pipe is communicated with the left side of the piston cylinder, an intake hole is opened on the left inner wall of the piston cylinder, a first connecting pipe and a second connecting pipe are communicated with the right inner wall of the piston cylinder, and the other ends of the first connecting pipe and the second connecting pipe are both communicated with the inside of the furnace body; an adjusting mechanism, the adjusting mechanism includes a piston rod slidably connected inside the piston cylinder, and a connecting channel is horizontally opened in the piston rod; a lifting mechanism, the lifting mechanism is used to move the piston rod up and down.

[0007] Preferably, the intake hole and the first connecting pipe are at the same horizontal height.

[0008] Preferably, the nitrogen inlet pipe and the second connecting pipe are at the same horizontal height.

[0009] Preferably, the lifting mechanism includes a threaded groove formed at the upper end of the piston rod. The inner top of the piston cylinder is rotatably connected with a threaded rod, and the lower end of the threaded rod extends into the threaded groove and is threadedly connected.

[0010] Preferably, the upper end of the threaded rod extends to the outside and is fixedly connected with a twisting handle.

[0011] Preferably, two guide rods are symmetrically and fixedly connected to the upper end of the piston rod. The upper ends of the two guide rods penetrate through the inner top of the piston cylinder and are slidably connected.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] The control valve assembly can realize the switching between nitrogen filling and heat dissipation modes through simple operation of the twisting handle. The operation is simple and fast, without the need for complex mechanical equipment or external control systems, reducing the equipment cost and maintenance difficulty. Through the filling of nitrogen, the workpiece processing quality is improved, and through the use of heat dissipation, the use comfort of subsequent users is improved. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a control valve assembly for a vacuum resistance furnace proposed by the present utility model;

[0015] Figure 2 It is Figure 1 the schematic structural diagram of the valve assembly;

[0016] Figure 3 It is Figure 2 the enlarged view of part A of

[0017] In the figure: 1 furnace body, 2 vacuum pump, 3 connecting plate, 4 piston cylinder, 5 nitrogen inlet pipe, 6 first connecting pipe, 7 second connecting pipe, 8 threaded rod, 9 guide rod, 10 piston rod, 11 connecting channel, 12 threaded groove, 13 air inlet hole, 14 twisting handle. Detailed Embodiment

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0019] Refer to Figures 1-3, A control valve assembly for a vacuum resistance furnace, comprising a furnace body 1. A vacuum pump 2 is installed at the upper end of the furnace body 1. By using the vacuum pump 2, the gas inside the furnace body 1 can be pumped away. The intake end of the vacuum pump 2 extends into the furnace body 1. A connecting plate 3 is fixedly connected to the left side of the furnace body 1. A piston cylinder 4 is fixedly connected to the upper end of the connecting plate 3. A communication port communicating with the outside is provided at the rear of the inner bottom space of the piston cylinder 4. A nitrogen inlet pipe 5 is connected to the left side of the piston cylinder 4. The other end of the nitrogen inlet pipe 5 is connected to an external nitrogen tank. An intake hole 13 is provided on the left inner wall of the piston cylinder 4. The intake hole 13 and the first connecting pipe 6 are at the same horizontal height. A first connecting pipe 6 and a second connecting pipe 7 are connected to the right inner wall of the piston cylinder 4. The other ends of the first connecting pipe 6 and the second connecting pipe 7 are both connected to the inside of the furnace body 1. The nitrogen inlet pipe 5 and the second connecting pipe 7 are at the same horizontal height;

[0020] Among them, an adjusting mechanism is further included. The adjusting mechanism includes a piston rod 10 slidably connected inside the piston cylinder 4. A connecting channel 11 is horizontally provided inside the piston rod 10;

[0021] Among them, a lifting mechanism is further included. The lifting mechanism is used to move the piston rod 10 up and down. Two guide rods 9 are symmetrically and fixedly connected to the upper end of the piston rod 10. The upper ends of the two guide rods 9 both penetrate through the inner top of the piston cylinder 4 and are slidably connected. The lifting mechanism includes a threaded groove 12 provided at the upper end of the piston rod 10. A threaded rod 8 is rotatably connected to the inner top of the piston cylinder 4. The lower end of the threaded rod 8 extends into the threaded groove 12 and is threadedly connected. The upper end of the threaded rod 8 extends to the outside and is fixedly connected with a twisting handle 14.

[0022] In the present utility model, during use, before heating, first start the vacuum pump 2 to pump away the air inside the furnace body 1 to make it in a vacuum state. Then, after rotating the twisting handle 14, move the piston rod 10 down to Figure 3 a position where the nitrogen inlet pipe 5 is communicated with the second connecting pipe 7. At this time, nitrogen will enter the furnace body 1 from the nitrogen tank, filling the furnace body 1 with nitrogen. Subsequently, rotate the twisting handle 14 to move the piston rod 10 up to a position where the connecting channel 11 is located between the nitrogen inlet pipe 5 and the intake hole 13, and then perform internal heating;

[0023] After the heating is completed, just rotate the twisting handle 14 until the connecting channel 11 is communicated with the intake hole 13. At this time, start the vacuum pump 2, and the air on the inner wall of the furnace body 1 can be continuously pumped away, while external normal temperature gas can be supplemented through the intake hole 13, so that continuous heat dissipation can be realized, and the temperature inside the furnace body 1 can be quickly reduced. Further, a gas purification device can be connected to the exhaust end of the vacuum pump 2 to treat the waste gas.

[0024] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. A control valve assembly for a vacuum resistance furnace, characterized in that: include: A furnace body (1), a vacuum pump (2) is installed at the upper end of the furnace body (1), an air inlet end of the vacuum pump (2) extends into the interior of the furnace body (1), a connecting plate (3) is fixedly connected to the left side of the furnace body (1), a piston cylinder (4) is fixedly connected to the upper end of the connecting plate (3), a nitrogen inlet pipe (5) is connected to the left side of the piston cylinder (4), an air inlet hole (13) is opened on the left inner wall of the piston cylinder (4), a first connecting pipe (6) and a second connecting pipe (7) are connected to the right inner wall of the piston cylinder (4), and the other ends of the first connecting pipe (6) and the second connecting pipe (7) are both connected to the interior of the furnace body (1); An adjusting mechanism, the adjusting mechanism comprising a piston column (10) slidably connected to the interior of the piston cylinder (4), wherein a connecting passage (11) is horizontally opened in the piston column (10); A lifting mechanism is provided, wherein the lifting mechanism is used to move the piston column (10) up and down.

2. A control valve assembly for a vacuum resistance furnace according to claim 1, characterized in that: The air inlet hole (13) and the first connecting pipe (6) are at the same level.

3. A control valve assembly for a vacuum resistance furnace according to claim 1, characterized in that: The nitrogen inlet pipe (5) and the second connecting pipe (7) are at the same level.

4. A control valve assembly for a vacuum resistance furnace according to claim 1, characterized in that: The lifting mechanism comprises a threaded groove (12) formed at the upper end of a piston column (10); the inner top of the piston cylinder (4) is rotatably connected to a threaded rod (8); the lower end of the threaded rod (8) extends into the threaded groove (12) and is threadedly connected.

5. A control valve assembly for a vacuum resistance furnace according to claim 4, characterized in that: The upper end of the threaded rod (8) extends to the outside and is fixedly connected to a twist handle (14).

6. A control valve assembly for a vacuum resistance furnace according to claim 1, characterized in that: The upper end of the piston column (10) is symmetrically fixedly connected to two guide rods (9), and the upper ends of the two guide rods (9) both penetrate the inner top of the piston cylinder (4) and are slidably connected.

Images