Roller bar type tempering furnace with lock chamber

Abstract

The utility model belongs to tempering furnace equipment technical field relates to a kind of roller bar type tempering furnace with lock gas chamber, including tempering furnace body, and the first lock gas chamber and the second lock gas chamber being set at the front and rear ends of tempering furnace body, the first lock gas chamber and the second lock gas chamber are respectively connected first vacuum pumping system and second vacuum system, and the first vacuum pumping system and second vacuum system all include vacuum pump group, nitrogen valve group and balance valve group. The utility model is simple in structure, easy to operate, can greatly reduce the oxidation problem possibly generated by part tempering, improves the quality requirement of part, simultaneously without frequently stopping furnace and cleaning scale, greatly reduces equipment failure and stopping furnace cleaning time.

Description

Technical Field

[0001] This utility model belongs to the technical field of tempering furnace equipment, specifically relating to a roller tempering furnace with an air-lock chamber. Background Technology

[0002] In the field of metal parts processing, in order to improve the stability of the part structure and prevent the part from undergoing structural transformation during use, and to keep the part's geometry and performance stable, it is generally necessary to temper the quenched parts. This involves reheating the parts to an appropriate temperature, holding them at that temperature for a period of time, and then slowly or rapidly cooling them. This is generally used to reduce or eliminate internal stress in the quenched parts, or to reduce their hardness and strength, thereby improving their ductility or toughness.

[0003] Currently, when parts are heated in a high-temperature tempering furnace, the surface of the product will oxidize due to the incomplete removal of air inside the furnace. This not only affects the quality of the parts, but also requires frequent furnace shutdowns to clean the oxide scale, which greatly increases equipment failure and furnace shutdown cleaning time. Utility Model Content

[0004] The purpose of this invention is to address the defects and shortcomings in the existing technology by designing a simple, stable, reliable, convenient, and effective roller tempering furnace with an air-lock chamber that improves the quality of parts.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a roller-type tempering furnace with a gas lock chamber, comprising a tempering furnace body, and a first gas lock chamber and a second gas lock chamber disposed at the front and rear ends of the tempering furnace body, wherein the first gas lock chamber and the second gas lock chamber are respectively connected to a first vacuum system and a second vacuum system, and both the first vacuum system and the second vacuum system include a vacuum pump group, a nitrogen valve group and a balance valve group.

[0006] Preferably, the front and rear ends of the first airlock chamber are respectively sealed and connected to a first outer door and a first inner door, and the first inner door is located between the first airlock chamber and the feeding end of the tempering furnace body.

[0007] Preferably, the front and rear ends of the second airlock chamber are respectively sealed and connected to a second inner door and a second outer door, and the second inner door is located between the second airlock chamber and the discharge end of the tempering furnace body.

[0008] Preferably, the first airlock chamber is provided with a feed roller that corresponds to the roller inside the tempering furnace.

[0009] Preferably, the second airlock chamber is provided with discharge rollers that correspond to the rollers inside the tempering furnace.

[0010] Preferably, the first and second airlock chambers are evacuated by a vacuum pump group, filled with nitrogen by a nitrogen valve group, and kept at the same pressure as the tempering furnace body by a balancing valve group.

[0011] After adopting the above technical solution, the roller tempering furnace with air-lock chamber provided by this utility model has the following beneficial effects:

[0012] (1) By setting the first air lock chamber and the second air lock chamber at the front and rear ends of the tempering furnace body, i.e. the inlet and outlet ends of the tempering furnace, this utility model can isolate air from entering the furnace. At the same time, by introducing nitrogen through the nitrogen valve group, it can ensure that the parts are tempered at high temperature and the cooling process after tempering are carried out under nitrogen protection, which greatly reduces the oxidation problem that may occur during the tempering of the parts.

[0013] (2) This utility model adopts non-oxidizing high-temperature tempering, which eliminates the need for frequent furnace shutdowns to clean oxide scale, greatly reducing equipment failures and furnace shutdown cleaning time;

[0014] (3) This utility model greatly reduces the decarburized layer on the surface of the parts and improves the quality requirements of the parts;

[0015] (4) The present invention uses vacuum gas exchange at the front and rear, which greatly reduces the amount of high-purity nitrogen gas used;

[0016] (5) This utility model uses vacuum air exchange at the front and rear, so there is no need to shot blast clean the parts after tempering. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a roller tempering furnace with an air-lock chamber according to the present invention;

[0018] Figure 2 This is a schematic diagram of the vacuum system in this utility model;

[0019] Figure 3 This is a schematic diagram of the vacuum pump unit in this utility model.

[0020] The components include: 1. Tempering furnace body; 2. First airlock chamber; 3. Second airlock chamber; 4. First vacuum system; 5. Second vacuum system; 6. Vacuum pump group; 7. Nitrogen valve group; 8. Balance valve group; 9. First outer door; 10. First inner door; 11. Second outer door; 12. Second inner door; 13. Feed roller; 14. Discharge roller. Detailed Implementation

[0021] The present invention will now be described in further clear and complete detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0024] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0025] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0026] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0027] This utility model discloses a roller-type tempering furnace with an air-lock chamber, such as... Figure 1-3 As shown, the furnace includes a tempering furnace body 1, and a first airlock chamber 2 and a second airlock chamber 3 symmetrically arranged at the front and rear ends of the tempering furnace body 1. The first airlock chamber 2 and the second airlock chamber 3 are respectively connected to the feed end and the discharge end of the tempering furnace body 1. Specifically, the first airlock chamber 2 is provided with a feed roller 13 corresponding to the rollers inside the tempering furnace body 1, and the second airlock chamber 3 is provided with a discharge roller 14 corresponding to the rollers inside the tempering furnace body 1. Furthermore, the front and rear ends of the first airlock chamber 2 are respectively sealed and connected to a first outer door 9 and a first inner door 9. Door 10, the first inner door 10 is located between the first airlock chamber 2 and the feeding end of the tempering furnace body 1. By opening or closing the first inner door 10, the connection or isolation between the first airlock chamber 2 and the tempering furnace body 1 can be realized. The front and rear ends of the second airlock chamber 3 are respectively sealed and connected to the second inner door 12 and the second outer door 11. The second inner door 12 is located between the second airlock chamber 3 and the discharge end of the tempering furnace body 1. By opening or closing the second inner door 12, the connection or isolation between the tempering furnace body 1 and the second airlock chamber 3 can be realized.

[0028] The first airlock chamber 2 and the second airlock chamber 3 are respectively connected to the first vacuum system 4 and the second vacuum system 5. The first vacuum system 4 and the second vacuum system 5 are symmetrically arranged, and both the first vacuum system 4 and the second vacuum system 5 include a vacuum pump group 6, a nitrogen valve group 7 and a balance valve group 8. The first airlock chamber 2 and the second airlock chamber 3 are evacuated by the vacuum pump group 6, filled with nitrogen by the nitrogen valve group 7, and kept at the same pressure as the tempering furnace body 1 by the balance valve group 8.

[0029] In use, the roller-type tempering furnace with an airlock chamber of this utility model is operated as follows: First, the first outer door 9 is opened, and the parts are moved into the first airlock chamber 2 via the feeding rollers 13. The first outer door 9 is then closed and pressed shut. The vacuum pump group 6 corresponding to the first airlock chamber 2 is started to remove most of the air from the first airlock chamber 2. The nitrogen valve group 7 is started to fill the first airlock chamber 2 with nitrogen to balance the pressure and replace the residual air. The balance valve group 8 is opened to ensure that the pressure in the first airlock chamber 2 is consistent with the pressure inside the tempering furnace body 1. The first inner door 10 is opened, and the parts move backward into the tempering furnace body 1. The first inner door 10 is then closed and pressed shut. The parts move according to the pressure inside the tempering furnace body 1. Different process requirements necessitate heating, tempering, and cooling. After heating, tempering, and cooling are completed, the parts are moved to the second inner door 12. The second inner door 12 is opened, and the parts enter the second airlock chamber 3. The second inner door 12 is closed and pressed tightly. The vacuum pump group 6 corresponding to the second airlock chamber 3 is started to remove most of the air from the second airlock chamber 3. The nitrogen valve group 7 is started to fill the second airlock chamber 3 with nitrogen to balance the pressure and replace the residual air. The balance valve group 8 is opened to ensure that the pressure in the second airlock chamber 3 is consistent with the pressure in the tempering furnace body 1. The second outer door 11 is opened, and the parts are transported to the outside of the equipment through the discharge roller 14. The second outer door 11 is then closed and pressed tightly.

[0030] In summary, the roller tempering furnace with a gas lock chamber provided by this utility model has a simple structure and is easy to operate. It can greatly reduce the oxidation problems that may occur during the tempering of parts, improve the quality requirements of parts, and eliminate the need for frequent furnace shutdowns to clean the oxide scale, thus greatly reducing equipment failures and furnace shutdown cleaning time. It has great market value and is worthy of widespread promotion and application.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A roller-type tempering furnace with an air-lock chamber, characterized in that: It includes a tempering furnace body (1), and a first airlock chamber (2) and a second airlock chamber (3) disposed at the front and rear ends of the tempering furnace body (1). The first airlock chamber (2) and the second airlock chamber (3) are respectively connected to a first vacuum system (4) and a second vacuum system (5). The first vacuum system (4) and the second vacuum system (5) each include a vacuum pump group (6), a nitrogen valve group (7) and a balance valve group (8).

2. The roller-type tempering furnace with an air-lock chamber according to claim 1, characterized in that: The first airlock chamber (2) is sealed at both ends of the front and rear ends with the first outer door (9) and the first inner door (10), respectively. The first inner door (10) is located between the first airlock chamber (2) and the feed end of the tempering furnace body (1).

3. A roller-type tempering furnace with an air-lock chamber according to claim 1, characterized in that: The front and rear ends of the second airlock chamber (3) are respectively sealed and connected to the second inner door (12) and the second outer door (11). The second inner door (12) is located between the second airlock chamber (3) and the discharge end of the tempering furnace body (1).

4. A roller-type tempering furnace with an air-lock chamber according to claim 1, characterized in that: The first airlock chamber (2) is equipped with a feed roller (13) that corresponds to the roller in the tempering furnace body (1).

5. A roller-type tempering furnace with an air-lock chamber according to claim 1, characterized in that: The second airlock chamber (3) is equipped with a discharge roller (14) that corresponds to the roller in the furnace body (1) of the tempering furnace.

6. A roller-type tempering furnace with an air-lock chamber according to claim 1, characterized in that: The first airlock chamber (2) and the second airlock chamber (3) are evacuated by the vacuum pump group (6), filled with nitrogen by the nitrogen valve group (7), and kept in line with the pressure inside the tempering furnace body (1) by the balance valve group (8).

Images