Vacuum anti-explosion oil quenching furnace

Abstract

The utility model relates to the technical field of oil quenching furnaces, in particular to a vacuum anti-explosion oil quenching furnace. The utility model provides a vacuum anti-explosion oil quenching furnace which comprises a transition chamber, a heating chamber, an oil groove chamber, a buffer tank, a balance valve, a manual valve, a vacuum pump set, an extraction valve, a pressure sensor, a nitrogen charging pipeline and a control module, a furnace front door is arranged on the front side of the transition chamber, the heating chamber is located on the rear side of the transition chamber, a furnace middle door is arranged between the heating chamber and the transition chamber, and the oil groove chamber is located on the lower side of the transition chamber. The buffer tank is communicated with the transition chamber through a connecting pipeline; the balance valve and the manual valve are arranged on the connecting pipeline; the vacuum pump set is communicated with the buffer tank through an air exhaust pipeline, and the air exhaust valve is arranged on the air exhaust pipeline; and the pressure sensor and the nitrogen charging pipeline are connected to the transition chamber. The buffer tank can instantly enable the pressure of the transition chamber to reach a set value through vacuum suction force, instant response can be achieved, and expanded gas in the transition chamber can be balanced more quickly.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil quenching furnace technical field especially is related to a vacuum explosion -proof oil quenching furnace. BACKGROUND

[0002] With the rapid development of the world, the society's requirement to heat treatment equipment is also higher and higher, and the market of vacuum oil quenching furnace is opening. The use requirement of vacuum oil quenching furnace is more strict, and the application field is more extensive. The traditional oil quenching furnace design cannot satisfy the use requirement under all working conditions, and the new technology is being widely and closely concerned by people.

[0003] The existing oil quenching furnace when workpiece drops into oil tank chamber quenching, the nitrogen and oil fume in the cavity rapidly expand in the process of workpiece quenching, especially for small workpiece, the furnace charging weight is heavy and the surface area is large, the temperature rises faster, the nitrogen and oil fume in the cavity of transition chamber rapidly rise from 0.5bar to 1.1bar, finally the front door of the furnace is opened, which causes the oil fume to leak into the factory building, causes pollution and safety hazard, and even explosion occurs in serious case. UTILITY MODEL CONTENTS

[0004] The utility model discloses a vacuum explosion -proof oil quenching furnace to solve the nitrogen and oil fume rapidly expand when workpiece quenching, cause the front door of the furnace to be opened, make the oil fume leak to the factory building, cause pollution and safety hazard, even explosion occurs in serious case technical problem.

[0005] Firstly, the utility model provides a vacuum explosion -proof oil quenching furnace, including: transition chamber, heating chamber, oil tank chamber, buffer tank, balance valve, manual valve, vacuum pump group, air extraction valve, pressure sensor, nitrogen charging pipeline and control module;

[0006] The transition chamber is communicated with the heating chamber and oil tank chamber respectively, the front side of the transition chamber is provided with the front door of the furnace, the heating chamber is located at the rear side of the transition chamber, and the balance valve and the manual valve are arranged on the connecting pipeline.

[0007] The buffer tank is communicated with the transition chamber through the connecting pipeline, and the balance valve and the manual valve are arranged on the connecting pipeline.

[0008] The vacuum pump group is communicated with the buffer tank through the air extraction pipeline, and the air extraction valve is arranged on the air extraction pipeline.

[0009] The pressure sensor and the nitrogen charging pipeline are connected to the transition chamber.

[0010] The balance valve, the vacuum pump group, the air extraction valve and the pressure sensor are electrically connected with the control module.

[0011] In an optional embodiment, an oil fume treatment device is further included.

[0012] The vacuum pump set is communicated with the oil fume treatment device through an exhaust pipeline.

[0013] In an optional embodiment, the oil fume treatment device comprises a filtering mechanism.

[0014] In an optional embodiment, the oil fume treatment device further comprises a combustion mechanism, and the filtering mechanism is located upstream of the combustion mechanism.

[0015] In an optional embodiment, a vacuum degree detection sensor is further included, which is arranged on the exhaust pipeline and located between the exhaust valve and the vacuum pump set.

[0016] The vacuum degree detection sensor is electrically connected with the control module.

[0017] In an optional embodiment, a pressure gauge is further included, which is arranged on the buffer tank.

[0018] The pressure gauge is electrically connected with the control module.

[0019] In an optional embodiment, a safety valve is arranged on the top of the buffer tank.

[0020] In an optional embodiment, a blowdown port is arranged on the bottom of the buffer tank.

[0021] In an optional embodiment, a first support is further included, which is arranged on the bottom of the heating chamber.

[0022] In an optional embodiment, a second support is further included, which is arranged on the bottom of the buffer tank.

[0023] Compared with the prior art, the vacuum explosion-proof oil quenching furnace provided by the utility model has the following technical advantages:

[0024] The vacuum explosion-proof oil quenching furnace comprises a transition chamber, a heating chamber, an oil tank chamber, a buffer tank, a balance valve, a manual valve, a vacuum pump set, an exhaust valve, a pressure sensor, a nitrogen charging pipeline and a control module; the transition chamber is communicated with the heating chamber and the oil tank chamber respectively, a front door is arranged on the front side of the transition chamber, the heating chamber is located on the rear side of the transition chamber, a middle door is arranged between the heating chamber and the transition chamber, and the oil tank chamber is located on the lower side of the transition chamber; the buffer tank is communicated with the transition chamber through a connecting pipeline, and the balance valve and the manual valve are arranged on the connecting pipeline; the vacuum pump set is communicated with the buffer tank through an exhaust pipeline, and the exhaust valve is arranged on the exhaust pipeline; the pressure sensor and the nitrogen charging pipeline are connected to the transition chamber; and the balance valve, the vacuum pump set, the exhaust valve and the pressure sensor are electrically connected with the control module.

[0025] After the buffer tank is vacuumized by the vacuum pump set, the pressure of the transition chamber can be instantly reached to the set value by vacuum suction through opening the balance valve, instant response can be achieved, and the gas in the transition chamber can be balanced faster.

[0026] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The structure schematic diagram of the vacuum explosion-proof oil quenching furnace provided by the present application is shown.

[0029] Icon: 1-transition chamber; 2-heating chamber; 3-oil tank chamber; 4-buffer tank; 5-balance valve; 6-hand valve; 7-vacuum pump set; 8-exhaust valve; 9-pressure sensor; 10-nitrogen charging pipeline; 11-furnace front door; 12-furnace middle door; 13-connection pipeline; 14-exhaust pipeline; 15-exhaust pipeline; 16-vacuum degree detection sensor; 17-pressure gauge; 18-safety valve; 19-dirty water outlet; 20-first support; 21-second support. DETAILED DESCRIPTION

[0030] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the utility model, it is to be explained that, unless there is definite stipulation and limitation, the term "mount", "link", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0033] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that the ordinary skilled in the art can realize, when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0034] The utility model will be further described in detail below through specific embodiment and in conjunction with the drawings.

[0035] Specific structure as Figure 1 It is shown.

[0036] The embodiment provides a vacuum explosion-proof oil quenching furnace, comprising: transition chamber 1, heating chamber 2, oil groove chamber 3, buffer tank 4, balance valve 5, manual valve 6, vacuum pump group 7, air extraction valve 8, pressure sensor 9, nitrogen filling pipeline 10 and control module;Transition chamber 1 is communicated with heating chamber 2 and oil groove chamber 3 respectively, and the front side of transition chamber 1 is provided with furnace front door 11, heating chamber 2 is located at the rear side of transition chamber 1, and furnace middle door 12 is arranged between heating chamber 2 and transition chamber 1, and oil groove chamber 3 is located at the lower side of transition chamber 1;Buffer tank 4 is communicated with transition chamber 1 through connecting pipeline 13, and balance valve 5 and manual valve 6 are both arranged on connecting pipeline 13;Vacuum pump group 7 is communicated with buffer tank 4 through air extraction pipeline 14, and air extraction valve 8 is arranged on air extraction pipeline 14;Pressure sensor 9 and nitrogen filling pipeline 10 are both connected to transition chamber 1;Balance valve 5, vacuum pump group 7, air extraction valve 8 and pressure sensor 9 are electrically connected with control module.

[0037] In the embodiment, after buffer tank 4 is vacuumized by vacuum pump group 7, the pressure of transition chamber 1 can be instantly reached to the set value by vacuum suction through opening balance valve 5, which can instantly respond and balance the expanded gas of transition chamber 1 more quickly. It not only meets the explosion-proof requirement of transition chamber 1, but also effectively avoids the pollution risk of oil fume to the factory environment.

[0038] In the optional technical solution of the embodiment, an oil fume treatment device is further included, and vacuum pump group 7 is communicated with the oil fume treatment device through exhaust pipeline 15. The oil fume treatment device is used to treat the oil fume, so as to avoid environmental pollution.

[0039] In an optional technical solution of the embodiment, the oil fume treatment device comprises a filtering mechanism. The filtering mechanism can use activated carbon for filtering or use a filter membrane for filtering, as long as the requirements are met.

[0040] In an optional technical solution of the embodiment, the oil fume treatment device comprises a combustion mechanism, and the gas discharged by the exhaust pipeline 15 is directly introduced into the combustion mechanism to combust the tail gas by the combustion mechanism, thereby avoiding environmental pollution.

[0041] Preferably, in the embodiment, the oil fume treatment device comprises the filtering mechanism and the combustion mechanism, and the filtering mechanism is located upstream of the combustion mechanism. The tail gas is filtered first and then combusted, so that the tail gas treatment is more thorough.

[0042] In an optional technical solution of the embodiment, a vacuum degree detection sensor 16 is further included, the vacuum degree detection sensor 16 is arranged on the air suction pipeline 14 and located between the air suction valve 8 and the vacuum pump set 7, and the vacuum degree detection sensor 16 is electrically connected with the control module. The vacuum degree detection sensor 16 can detect the vacuum degree in the buffer tank 4 in real time, and when the vacuum pump set 7 performs vacuumization on the buffer tank 4, the vacuum degree in the buffer tank 4 is ensured to reach the requirement.

[0043] In an optional technical solution of the embodiment, a pressure gauge 17 is further included, the pressure gauge 17 is arranged on the buffer tank 4.

[0044] The pressure gauge 17 is electrically connected with the control module. The pressure gauge 17 can detect the pressure in the buffer tank 4 in real time, and the buffer tank 4 is ensured to work within a safe pressure range.

[0045] In an optional technical solution of the embodiment, a safety valve 18 is arranged on the top of the buffer tank 4. The safety and reliability of the buffer tank 4 are ensured.

[0046] In an optional technical solution of the embodiment, a blowdown port 19 is arranged on the bottom of the buffer tank 4. The buffer tank 4 can be regularly cleaned through the blowdown port 19.

[0047] In an optional technical solution of the embodiment, a first support 20 is further included, and the first support 20 is arranged on the bottom of the heating chamber 2. The structure is simple, and the stability of the heating chamber 2 is ensured.

[0048] In an optional technical solution of the embodiment, a second support 21 is further included, and the second support 21 is arranged on the bottom of the buffer tank 4. The buffer tank 4 is prevented from directly falling to the ground, and the blowdown through the blowdown port 19 on the bottom is facilitated.

[0049] The quenching process provided in the embodiment is based on the above-mentioned vacuum explosion-proof oil quenching furnace, and thus the technical advantages and effects achieved by the quenching process include those achieved by the vacuum explosion-proof oil quenching furnace, which will not be described herein again.

[0050] The quenching process comprises the following steps: heating the workpiece in the heating chamber 2; starting the vacuum pump set 7, opening the exhaust valve 8, closing the balance valve 5, opening the manual valve 6, and vacuumizing the buffer tank 4 through the vacuum pump set 7 until the vacuum degree of the buffer tank 4 reaches 5 Pa and is maintained; transferring the heated workpiece from the heating chamber 2 to the transition chamber 1, and filling nitrogen to 0.5 bar in the transition chamber 1 through the nitrogen pipeline; lowering the workpiece to the oil tank chamber 3 for quenching, closing the vacuum pump set 7, closing the exhaust valve 8, opening the balance valve 5 when the pressure of the transition chamber 1 reaches a first preset value, and closing the balance valve 5 after the pressure is lower than a second preset value; wherein the first preset value is greater than the second preset value; lifting the quenched workpiece to the transition chamber 1, starting the vacuum pump set 7, opening the exhaust valve 8, and vacuumizing the buffer tank 4 and the transition chamber 1 through the vacuum pump set 7; when the vacuum degree of the buffer tank 4 reaches 5 Pa, closing the vacuum pump set 7, closing the exhaust valve 8, and closing the balance valve 5; filling nitrogen to 1 bar in the transition chamber 1, opening the furnace front door 11, and taking out the workpiece.

[0051] Specifically, in use, the workpiece is heated in the heating chamber 2, the vacuum pump group 7 is started, the exhaust valve 8 is opened, and the balance valve 5 is closed by controlling the control module, the manual valve 6 is opened manually, the buffer tank 4 is vacuumized, and the vacuum degree is maintained at 5 Pa; after the workpiece is heated, the furnace door 12 is opened, the workpiece is transferred from the heating chamber 2 to the transition chamber 1, and then the furnace door 12 is closed, the transition chamber 1 is filled with nitrogen gas to 0.5 bar through the nitrogen gas pipeline, and the oil surface pressure is controlled to prevent the quenching oil from boiling under vacuum; the workpiece is lowered into the oil tank chamber 3 for quenching, and at the same time, the vacuum pump group 7 is closed and the exhaust valve 8 is closed by controlling the control module; at this time, the pressure in the transition chamber 1 is detected by the pressure sensor 9, when the pressure reaches the first preset value, the balance valve 5 is opened by controlling the control module, and when the pressure is lower than the second preset value, the balance valve 5 is closed by controlling the control module, wherein the first preset value is greater than the second preset value, the oil surface pressure during quenching can be stably maintained within a reliable process range, and the manual valve 6 is kept in an open state; during the quenching process of the workpiece, the pressure of the rapidly expanding nitrogen gas and oil fume in the cavity is released to the buffer tank 4, so that the pressure in the transition chamber 1 can be maintained below 0.9 bar during the entire quenching process, effectively avoiding the safety hazards of leakage caused by the front door 11 being pushed open and explosion caused by the front door 11 not being pushed open; after the workpiece is quenched, the workpiece is raised to the transition chamber 1, the vacuum pump group 7 is started and the exhaust valve 8 is opened by controlling the control module, the oil fume in the transition chamber 1 and the buffer tank 4 is pumped out until the vacuum degree is pumped to 5 Pa, and then the vacuum pump group 7 is closed, the exhaust valve 8 is closed, and the balance valve 5 is closed by controlling the control module; then the transition chamber 1 is filled with nitrogen gas to 1 bar through the nitrogen gas pipeline, the front door 11 is opened, and the workpiece is taken out. After the buffer tank 4 is vacuumized by the vacuum pump group 7, the pressure in the transition chamber 1 can be instantly reached to the set value by the vacuum suction force by opening the balance valve 5, which can instantly respond and balance the expanded gas in the transition chamber 1 faster. It not only meets the explosion-proof requirement of the transition chamber 1, but also effectively avoids the pollution risk of oil fume to the factory environment.

[0052] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vacuum oil quenching furnace, characterized by comprising: The utility model relates to a kind of oil fume treatment device and its control system, including: Transition chamber (1), heating chamber (2), oil tank chamber (3), buffer tank (4), balance valve (5), manual valve (6), vacuum pump group (7), air extraction valve (8), pressure sensor (9), nitrogen charging pipeline (10) and control module; The transition chamber (1) is communicated with the heating chamber (2) and the oil tank chamber (3) respectively, the front side of the transition chamber (1) is provided with a furnace front door (11), the heating chamber (2) is located at the rear side of the transition chamber (1), and a furnace door (12) is provided between the heating chamber (2) and the transition chamber (1), and the oil tank chamber (3) is located at the lower side of the transition chamber (1); The buffer tank (4) is communicated with the transition chamber (1) by connecting pipeline (13), and the balance valve (5) and the manual valve (6) are arranged on the connecting pipeline (13); The vacuum pump group (7) is communicated with the buffer tank (4) by air extraction pipeline (14), and the air extraction valve (8) is arranged on the air extraction pipeline (14); The pressure sensor (9) and the nitrogen charging pipeline (10) are connected to the transition chamber (1); The balance valve (5), the vacuum pump group (7), the air extraction valve (8) and the pressure sensor (9) are electrically connected with the control module.

2. The vacuum oil quenching furnace according to claim 1, wherein It also includes an oil fume treatment device. The vacuum pump group (7) is communicated with the oil fume treatment device by exhaust pipeline (15).

3. The vacuum oil quenching furnace according to claim 2, wherein The oil fume treatment device includes a filtering mechanism.

4. The vacuum oil quenching furnace according to claim 3, wherein The oil fume treatment device also includes a combustion mechanism, and the filtering mechanism is located upstream of the combustion mechanism.

5. The vacuum oil quenching furnace according to claim 1, wherein It also includes a vacuum degree detection sensor (16), which is arranged on the air extraction pipeline (14) and located between the air extraction valve (8) and the vacuum pump group (7); The vacuum degree detection sensor (16) is electrically connected with the control module.

6. The vacuum oil quenching furnace according to claim 1, wherein It also includes a pressure gauge (17), which is arranged on the buffer tank (4); The pressure gauge (17) is electrically connected with the control module.

7. The vacuum oil quenching furnace according to claim 1, wherein The top of the buffer tank (4) is provided with a safety valve (18).

8. The vacuum oil quenching furnace according to claim 1, wherein The bottom of the buffer tank (4) is provided with a blowdown opening (19).

9. The vacuum oil quenching furnace according to claim 1, wherein It also includes a first support (20), which is arranged at the bottom of the heating chamber (2).

10. The vacuum oil quenching furnace according to claim 1, wherein It also includes a second support (21), which is arranged at the bottom of the buffer tank (4).

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