Exhaust hole check valve for microwave sintering box type atmosphere furnace

Abstract

The utility model discloses an exhaust hole check valve for a microwave sintering box type atmosphere furnace, which comprises an outer shell provided with an exhaust channel and a check valve body arranged in the outer shell. The check valve body is detachably connected with the outer shell; the check valve body is a butterfly valve. According to the exhaust hole check valve for the microwave sintering box type atmosphere furnace, the outer shell and the butterfly valve which are made of corundum are arranged, compared with an existing check valve, the exhaust hole check valve is more suitable for a microwave oven, the problem that resin materials are not resistant to high temperature is solved, and meanwhile the problem that a metal check valve generates electric sparks in microwaves is solved; the stable performance can be kept in a severe environment, and the service life of the check valve is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of microwave high-temperature sintering equipment, in particular to an exhaust hole check valve used for a microwave sintering box-type atmosphere furnace. Background Art

[0002] Conventional sintering technology is used to sinter materials. The heating device is mainly used to generate heat, and the material is heated from the outside to the inside. The thermal efficiency is low and the heating is uneven inside and outside. Microwave sintering can make the polar particles inside the material vibrate at high speed, so that the inside and outside are heated as a whole. It is highly efficient and the heating is uniform. It is especially suitable for sintering ceramic products.

[0003] During the sintering process of materials, it is often necessary to introduce atmospheric conditions, such as reducing or oxidizing atmosphere, to adjust the properties of the prepared materials. After the atmosphere is introduced, a check valve needs to be installed at the exhaust hole to prevent the exhaust gas from flowing back into the furnace and polluting the sintered products.

[0004] In the use of microwave sintering box atmosphere furnace, the exhaust hole is a crucial component, which is not only used to discharge the waste gas generated in the furnace, but also needs to prevent gas backflow under certain circumstances to ensure the stability and safety of the atmosphere in the furnace. However, the traditional exhaust hole design often has problems such as complex structure, difficult maintenance, and poor sealing performance, especially in harsh environments such as high temperature and high corrosion, these problems are more prominent.

[0005] In order to solve these problems and improve the performance and service life of microwave sintering box-type atmosphere furnace, a new type of exhaust hole check valve needs to be designed. The check valve should have good sealing performance to ensure that the gas backflow can be completely blocked when needed; at the same time, its structure should be as simple as possible to facilitate installation and maintenance. In addition, considering that microwave sintering box-type atmosphere furnaces usually need to operate in high temperature, high corrosion and other environments, the material selection of the check valve is also crucial.

[0006] Currently, most check valves are made of resin or metal. Resin materials are not resistant to high temperatures. For sintered ceramic products, the exhaust gas temperature is mostly above 800°C, so it is not feasible to use resin check valves. Metal check valves are resistant to high temperatures, but because metals easily generate sparks in microwave electromagnetic fields, they are not suitable for microwave heating furnaces.

[0007] Therefore, it is urgent to design a check valve for the exhaust port of a microwave sintering box-type atmosphere furnace that overcomes the above-mentioned technical problems. Utility Model Content

[0008] The utility model aims to overcome the shortcomings in the prior art and provides a check valve for an exhaust hole of a microwave sintering box-type atmosphere furnace.

[0009] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0010] A check valve for an exhaust hole of a microwave sintering box-type atmosphere furnace, comprising an outer shell provided with an exhaust passage and a check valve body arranged in the outer shell; the check valve body and the outer shell are detachably connected;

[0011] The check valve body is a butterfly valve.

[0012] Furthermore, a sealing ring is provided at the connection between the check valve body and the inner wall of the outer shell;

[0013] The sealing ring is in the shape of a ring made of high temperature resistant fiber material.

[0014] Further, the butterfly valve comprises an annular valve seat, a valve shaft and a semicircular valve; wherein:

[0015] A valve shaft is arranged at the vertical center of the annular valve seat, and the left and right ends of the valve shaft are respectively connected to semicircular valves; a spring is wound around the valve shaft.

[0016] Furthermore, it also includes a sealing ring, which is a convex sealing ring respectively arranged at the left and right ends of the outer shell;

[0017] The sealing ring is made of high temperature resistant rubber material such as silicone rubber and fluororubber.

[0018] Furthermore, the outer shell and the butterfly valve are both made of corundum.

[0019] Further, the length of the outer shell is 20-50 mm;

[0020] The outer diameter of the check valve body is 5-10 mm, and the thickness is 3 mm.

[0021] Compared with the prior art, the beneficial effects of the utility model are mainly reflected in:

[0022] The utility model discloses a check valve for exhaust holes of a microwave sintering box-type atmosphere furnace. By providing an outer shell body and a butterfly valve made of corundum, the check valve is more suitable for microwave ovens than the existing check valve, and solves the problem that resin materials are not resistant to high temperatures, and solves the problem that metal check valves generate electric sparks in microwaves. The check valve can maintain stable performance in harsh environments, and prolong the service life of the check valve.

[0023] The utility model discloses a check valve for the exhaust hole of a microwave sintering box-type atmosphere furnace. The check valve body adopts a butterfly valve structure and has the characteristics of simple structure, convenient operation and good sealing performance. It not only improves the reliability and service life of the check valve, but also reduces the maintenance cost, thus providing a strong guarantee for the stable operation of the microwave sintering box-type atmosphere furnace.

[0024] The above description is only an overview of the technical solution of the utility model. In order to clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following preferred embodiments of the utility model are described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of the exhaust hole check valve used in a microwave sintering box-type atmosphere furnace of the utility model;

[0027] Figure 2 It is another structural schematic diagram of the exhaust hole check valve used for a microwave sintering box-type atmosphere furnace of the utility model;

[0028] Figure 3 It is a cross-sectional view of the exhaust hole check valve used for a microwave sintering box-type atmosphere furnace of the utility model;

[0029] Description of reference numerals:

[0030] 1. Outer shell; 2. Check valve body; 3. Exhaust channel; 4. Sealing ring; 5. Sealing ring;

[0031] 21. Annular valve seat; 22. Valve shaft; 23. Semicircular valve; 24. Spring; DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation method, structure, characteristics and effects of the exhaust hole check valve for a microwave sintering box-type atmosphere furnace proposed by the utility model are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0033] Example 1

[0034] See also Figure 1-3 The present embodiment provides an exhaust hole check valve for a microwave sintering box-type atmosphere furnace, comprising an outer shell 1 provided with an exhaust channel 3 and a check valve body 2 arranged in the outer shell 1; the check valve body 2 is detachably connected to the outer shell 1; when the check valve body 2 needs to be replaced or repaired, the check valve body 2 can be quickly removed from the outer shell 1, which greatly improves the maintenance efficiency of the equipment and reduces the maintenance cost.

[0035] The check valve body 2 is a butterfly valve. By using a butterfly valve as the check valve body 2, the opening and closing of the valve can be controlled by rotating the valve shaft 22, and the operation is simple and quick.

[0036] In the present application, during use, it is only necessary to put a suitable check valve on the exhaust pipe, and apply refractory glue to the contact part between the pipe and the check valve for sealing.

[0037] When the butterfly valve is closed, a tight seal can be formed between the valve and the valve seat, effectively preventing gas backflow and ensuring the stability of the atmosphere in the furnace. At the same time, when it is necessary to discharge gas, the valve shaft 22 can be rotated to open the valve to achieve rapid discharge, thereby improving the efficiency of the sintering process.

[0038] As a preferred embodiment, the outer shell 1 and the butterfly valve are both made of corundum.

[0039] Corundum is known for its extremely high melting point and can maintain stable physical and chemical properties at extremely high temperatures. Therefore, the outer shell 1 and the butterfly valve made of corundum can operate stably for a long time in the high temperature environment of the microwave sintering box atmosphere furnace without worrying about deformation or damage caused by high temperature.

[0040] The outer shell 1 and butterfly valve made of corundum material provide the exhaust hole check valve of the microwave sintering box-type atmosphere furnace with excellent high temperature resistance, corrosion resistance, high hardness and wear resistance as well as good sealing performance; the above designs jointly improve the reliability and stability of the equipment and provide a strong guarantee for the smooth progress of the sintering process.

[0041] Example 2

[0042] Based on Example 1, please refer to Figure 1-3 In this embodiment, a sealing ring 4 is provided at the connection between the check valve body 2 and the inner wall of the outer shell 1; the sealing ring 4 is a key component of the connection, which can fill the small gap between the check valve body 2 and the outer shell 1 and effectively prevent gas leakage from the connection, which is crucial to maintaining the stability of the atmosphere in the furnace and ensuring the smooth progress of the sintering process;

[0043] The sealing ring 4 is made of a high-temperature resistant fiber material in a ring shape; it can maintain stable physical and chemical properties in a high-temperature environment and will not be deformed or damaged by high temperature; it effectively ensures the long-term effectiveness of the sealing ring 4 under high temperature conditions, thereby ensuring the sealing performance of the entire check valve.

[0044] In this embodiment, the sealing ring 4 made of high temperature resistant fiber material can adapt to working environments under different temperature and pressure conditions, and has strong adaptability and stability. This enables the exhaust hole check valve to be used under a wider range of working conditions, improving the adaptability and reliability of the equipment.

[0045] Specifically, see Figure 2 , the butterfly valve comprises an annular valve seat 21, a valve shaft 22 and a semicircular valve 23; wherein:

[0046] A valve shaft 22 is arranged at the vertical center of the annular valve seat 21 . By rotating the valve shaft 22 , the semicircular valve 23 can be opened and closed. The left and right ends of the valve shaft 22 are respectively connected to the semicircular valve 23 . A spring 24 is wound around the valve shaft 22 .

[0047] When the semicircular valve 23 is fully opened, an unobstructed passage is formed between it and the annular valve seat 21, allowing gas to flow freely.

[0048] When the semicircular valve 23 is closed, it fits tightly against the annular valve seat 21 to form a seal to prevent gas backflow.

[0049] In the present application, the butterfly valve drives the opening and closing of the semicircular valve 23 by rotating the valve shaft 22, thereby controlling the passage of the gas flow. Due to its simple structure and convenient operation, the butterfly valve is particularly suitable for occasions where the gas flow needs to be frequently adjusted. In addition, the butterfly valve has good sealing performance, which can effectively prevent gas backflow and ensure the stability of the atmosphere in the furnace.

[0050] Considering the high temperature environment of the microwave sintering box-type atmosphere furnace, the annular valve seat 21, the valve shaft 22 and the semicircular valve 23 are made of high temperature resistant corundum material, which can withstand high temperatures and will not absorb or reflect microwaves to generate sparks.

[0051] Furthermore, it also includes a sealing ring 5, which is a convex sealing ring 5 respectively arranged at the left and right ends of the outer shell 1; the convex sealing ring 5 part provides an ideal coating surface, which can be conveniently coated with heat-resistant glue;

[0052] The sealing ring 5 is made of high temperature resistant rubber materials such as silicone rubber and fluororubber; since the sealing ring 5 is made of high temperature resistant materials and has good elasticity and anti-aging properties, it can adapt to working environments under different temperature and pressure conditions. This enables the exhaust hole check valve to be used under a wider range of working conditions, improving the adaptability and reliability of the equipment.

[0053] As a preferred embodiment, the length of the outer shell 1 is 20-50 mm;

[0054] The outer diameter of the check valve body 2 is 5-10 mm, and its thickness is 3 mm;

[0055] The outer diameter of the sealing ring 5 is 8-15 mm; the diameter of the exhaust passage 3 is 5-10 mm.

[0056] The present invention is further described above in conjunction with the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A check valve for exhaust holes of a microwave sintering box-type atmosphere furnace, characterized in that: It comprises an outer shell (1) provided with an exhaust passage (3) and a check valve body (2) arranged in the outer shell (1); the check valve body (2) and the outer shell (1) are detachably connected; The check valve body (2) is a butterfly valve.

2. The exhaust hole check valve for a microwave sintering box-type atmosphere furnace according to claim 1, characterized in that: A sealing ring (4) is provided at the connection between the check valve body (2) and the inner wall of the outer shell (1); The sealing ring (4) is in the shape of a ring and is made of high temperature resistant fiber material.

3. The exhaust hole check valve for a microwave sintering box-type atmosphere furnace according to claim 1, characterized in that: The butterfly valve comprises an annular valve seat (21), a valve shaft (22) and a semicircular valve (23); wherein: A valve shaft (22) is arranged at the vertical center of the annular valve seat (21), and the left and right ends of the valve shaft (22) are respectively connected to semicircular valves (23); A spring (24) is wound around the valve shaft (22).

4. The exhaust hole check valve for a microwave sintering box-type atmosphere furnace according to claim 1, characterized in that: It also includes a sealing ring (5), which is a convex sealing ring (5) respectively arranged at the left and right ends of the outer shell (1); The sealing ring (5) is made of high temperature resistant rubber material such as silicone rubber and fluororubber.

5. The exhaust hole check valve for a microwave sintering box-type atmosphere furnace according to claim 1, characterized in that: The outer shell (1) and the butterfly valve are both made of corundum.

6. The exhaust hole check valve for a microwave sintering box-type atmosphere furnace according to claim 1, characterized in that: The length of the outer shell (1) is 20-50 mm; The outer diameter of the check valve body (2) is 5-10 mm, and its thickness is 3 mm.

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