Nitric oxide preventing oven

Abstract

The utility model relates to the technical field of test instruments, and discloses an anti-nitrogen oxide oven which comprises a test box, a test cavity for placing a tested sample is arranged in the test box, and an inflow pipeline for nitrogen to flow into the test cavity and an outflow pipeline for air flow to be discharged out of the test cavity are arranged at the top of the test box; the nitrogen testing device is used for providing nitrogen flow and is connected with the inflow pipeline; a sealing door is arranged at the front end of the test box; the test cavity is provided with an anti-explosion pressure relief opening; the oxygen-free aging test device has the following advantages: 1, the oxygen-free aging test device is used for carrying out an aging test under an oxygen-free condition, and the influence of oxygen on a test result is eliminated, so that the test result is more accurate; 2, the test box is also provided with a sample cart, and the sample cart is convenient for connecting a test product to enter and exit from the oven, so that manpower is saved;

Description

Technical Field

[0001] The utility model relates to the technical field of testing instruments, in particular to an anti-oxidation nitrogen oven. Background Art

[0002] Test chamber is a general term for products in the environmental testing industry. It simulates the natural climate environment within an effective space range to test the various performance indicators of the test products. There are many types of test chambers: high and low temperature test chambers, aging test chambers, box-type rain chambers, etc. Existing aging test chambers usually directly heat the test products in an aerobic environment, but for products that are easily oxidized, such as batteries, they have already been oxidized or partially oxidized during the heating test. The oxidized samples will produce an oxide film on the surface, resulting in inaccurate test results. In view of this, the inventor made a new invention. Utility Model Content

[0003] The utility model aims to provide an anti-oxidation nitrogen oven with the characteristics of high test accuracy in view of the deficiencies in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model is an anti-oxidation nitrogen oven, comprising a test box, wherein a test cavity for placing a sample to be tested is arranged inside the test box, an inflow pipe for nitrogen to flow into the test cavity and an outflow pipe for air to be discharged from the test cavity are arranged on the top of the test box; a nitrogen test device for providing nitrogen air flow is also included, and the nitrogen test device is connected to the inflow pipe; a sealed door is arranged at the front end of the test box; and an explosion-proof pressure relief port is arranged in the test cavity.

[0005] Preferably, the nitrogen test device comprises a first air intake pipeline, the first air intake pipeline is connected to the inflow pipe, and the first air intake pipeline is provided with a nitrogen preheater.

[0006] Preferably, the first air intake pipeline is connected to a second air intake pipeline in front of the nitrogen preheater, and the second air intake pipeline is connected to the inflow pipe; a three-way ball valve is provided at the connection between the second air intake pipeline and the first air intake pipeline.

[0007] Preferably, an electric proportional valve and a flow meter are sequentially provided at the air intake end of the first air intake pipeline.

[0008] Preferably, the test chamber is provided with a concentration measuring instrument for measuring oxygen concentration.

[0009] Preferably, the explosion-proof pressure relief port is provided with an explosion-proof device, and the explosion-proof device comprises an explosion-proof shell, one end of the explosion-proof shell is fixedly connected to the test box through an explosion-proof chain, and the other end is detachably connected to the test box.

[0010] Preferably, a sample cart for transporting samples is also included, and the sample cart includes a carrier rack and a plurality of sliding wheels arranged at the bottom of the carrier rack.

[0011] Preferably, the carrier is provided with a push handle and a set of sliding rails.

[0012] Beneficial effects: Compared with the prior art, the utility model is an anti-oxidation nitrogen oven, which has the following advantages: 1. It can realize aging test under anaerobic conditions, eliminate the influence of oxygen on the test results, and make the test results more accurate; 2. The test box is equipped with a sample trolley, which is convenient for connecting products in and out of the oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the test box of the utility model.

[0014] Figure 2 This is a schematic structural diagram of the nitrogen test device of the present utility model.

[0015] Figure 3 This is a schematic diagram of the explosion-proof device structure of the utility model.

[0016] Figure 4 This is a schematic diagram of the test chamber structure of the utility model.

[0017] Reference numerals include:

[0018] Test box--1, inflow pipe--11, outflow pipe--12, sealing door--13, concentration measuring instrument--14, test chamber--2, explosion-proof pressure relief port--21, nitrogen test device--3, first air inlet pipeline--31, nitrogen preheater--32, second air inlet pipeline--33, three-way ball valve--34, electric proportional valve--35, flow meter--36, explosion-proof device--4, explosion-proof shell--41, explosion-proof chain--42, sample cart--5, loading rack--51, pushing handle--511, sliding rail--512, sliding wheel--52. DETAILED DESCRIPTION

[0019] The following is combined with Figures 1 to 4 The utility model is described in detail.

[0020] The utility model is an anti-oxidation nitrogen oven, i.e., a high-temperature oven, which includes a test box 1, wherein a test chamber 2 for placing a sample to be tested is provided inside the test box 1, an inflow pipe 11 for nitrogen to flow into the test chamber 2 and an outflow pipe 12 for the gas to be discharged from the test chamber 2 are provided at the top of the test box 1; a nitrogen test device 3 for providing a nitrogen gas flow is also provided, and the nitrogen test device 3 is connected to the inflow pipe 11; a sealing door 13 is provided at the front end of the test box 1; and an explosion-proof pressure relief port 21 is provided in the test chamber 2. The utility model continuously provides a nitrogen gas flow to the test chamber 2 through the nitrogen test device 3, so that an aging test can be performed under anaerobic conditions, and the influence of oxygen on the test results is eliminated, so that the test results are more accurate.

[0021] Preferably, the nitrogen test device 3 includes a first air intake pipeline 31, which is connected to the inflow pipeline 11 and is provided with a nitrogen preheater 32. The first air intake pipeline 31 is connected to an external nitrogen source, and the nitrogen enters the first air intake pipeline 31 and flows through the nitrogen preheater 32. After the air flow temperature increases, it flows into the test chamber 2, blows through the test sample, and is discharged from the outflow pipeline 12, thereby realizing a non-oxidation high temperature test.

[0022] To further improve the technical solution, the first air intake pipeline 31 is connected to a second air intake pipeline 33 in front of the nitrogen preheater 32, and the second air intake pipeline 33 is connected to the inflow pipe 11; a three-way ball valve 34 is provided at the connection between the second air intake pipeline 33 and the first air intake pipeline 31. When the test is completed, the pipeline leading to the nitrogen preheater 32 is closed by the three-way ball valve 34, and the second air intake pipeline 33 is opened, so that the nitrogen in the first air intake pipeline 31 flows into the test chamber 2 from the second air intake pipeline 33, and the unheated air flow is used to cool the test chamber 2. After the test chamber 2 drops to room temperature, it is convenient to carry out the next batch of tests.

[0023] Preferably, the inlet end of the first inlet pipeline 31 is provided with an electric proportional valve 35 and a flow meter 36 in sequence. The electric proportional valve 35 is used to control the flow of nitrogen according to the test requirements, and the flow meter 36 is used to display the nitrogen flow of the first inlet pipeline to facilitate monitoring of the test process.

[0024] Preferably, the test box 1 is provided with a concentration measuring instrument 14 for measuring oxygen concentration. During the test, the concentration measuring instrument 14 is used to observe whether the oxygen concentration inside the test chamber 2 meets the test requirements. If it does not meet the test requirements, the test needs to be stopped, the test box 1 needs to be repaired, and the reason for the high oxygen concentration needs to be found out.

[0025] In this technical solution, in order to improve the safety of the test process, the explosion-proof pressure relief port 21 is provided with an explosion-proof device 4, and the explosion-proof device 4 includes an explosion-proof shell 41, one end of which is fixedly connected to the test box 1 through an explosion-proof chain 42, and the other end is detachably connected to the test box 1. Samples of high temperature tests, such as batteries, are prone to explosion when the temperature is too high. At this time, if the sample explodes and the air pressure inside the test chamber 2 is too high, the explosion-proof shell 41 will quickly pop open under the action of the air pressure, release the gas, and prevent the damage caused by the explosion of the sealed test chamber 2. At the same time, the explosion-proof shell 41 is pulled by the explosion-proof chain 42 to prevent the explosion-proof shell 41 from flying out and causing personal injury.

[0026] The utility model also includes a sample trolley 5 for transporting samples, the sample trolley 5 includes a carrier 51 and a plurality of sliding wheels 52 arranged at the bottom of the carrier 51; further, the carrier 51 is provided with a push handle 511 and a set of sliding rails 512. When transferring the test sample, the sample rack is placed on the carrier 51 along the sliding rails 512, and then the carrier 51 is pushed to the test box 1 body, and the sample rack can be pushed into the test chamber 2 along the sliding rails 512 with more effort; after the test is completed, the sample rack can also be pushed to the carrier 51 through the sliding rails 512. The sample trolley 5 can facilitate the connection of products in and out of the oven, saving more manpower.

[0027] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An anti-oxidation nitrogen oven, comprising a test box (1), characterized in that: The test box (1) is provided with a test chamber (2) for placing a sample to be tested, and the top of the test box (1) is provided with an inflow pipe (11) for nitrogen to flow into the test chamber (2) and an outflow pipe (12) for gas to flow out of the test chamber (2); the test box (1) also includes a nitrogen test device (3) for providing a nitrogen gas flow, and the nitrogen test device (3) is connected to the inflow pipe (11); the front end of the test box (1) is provided with a sealed door (13); the test chamber (2) is provided with an explosion-proof pressure relief port (21); The nitrogen test device (3) comprises a first air intake pipeline (31), the first air intake pipeline (31) is connected to the inflow pipeline (11), and the first air intake pipeline (31) is provided with a nitrogen preheater (32).

2. The anti-oxidation nitrogen oven according to claim 1, characterized in that: The first air intake pipeline (31) is connected to a second air intake pipeline (33) in front of the nitrogen preheater (32), and the second air intake pipeline (33) is connected to the inflow pipeline (11); a three-way ball valve (34) is provided at the connection between the second air intake pipeline (33) and the first air intake pipeline (31).

3. The anti-oxidation nitrogen oven according to claim 1, characterized in that: An electric proportional valve (35) and a flow meter (36) are sequentially arranged at the air intake end of the first air intake pipeline (31).

4. The anti-oxidation nitrogen oven according to claim 1, characterized in that: The test box (1) is provided with a concentration measuring instrument (14) for measuring oxygen concentration.

5. The anti-oxidation nitrogen oven according to claim 1, characterized in that: The explosion-proof pressure relief port (21) is provided with an explosion-proof device (4), and the explosion-proof device (4) comprises an explosion-proof shell (41), one end of the explosion-proof shell (41) is fixedly connected to the test box (1) through an explosion-proof chain (42), and the other end is detachably connected to the test box (1).

6. The oxidation-proof nitrogen oven according to claim 1, characterized in that: Also included is a sample cart (5) for transporting samples, wherein the sample cart (5) comprises a carrier rack (51) and a plurality of sliding wheels (52) arranged at the bottom of the carrier rack (51).

7. The anti-oxidation nitrogen oven according to claim 6, characterized in that: The object carrier (51) is provided with a push handle (511) and a set of sliding rails (512).

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