Device for testing stability of chemicals

Abstract

The utility model discloses a device for testing the stability of chemicals, which comprises a test pool, a pressure sensor, a three-way interface, a pressure release valve, a three-way valve, a vacuum-pumping system and an inert gas cylinder, the three-way interface comprises a first interface, a second interface and a third interface, the three-way valve comprises a first valve port, a second valve port and a third valve port, the pressure release valve is provided with a pressure release valve inlet for gas to enter and a pressure release valve outlet for releasing the pressure of the gas, the test pool is connected to the first interface, the second interface is connected to the pressure sensor, the third interface is connected to the pressure release valve inlet, and the pressure sensor is connected to the pressure release valve outlet. And gas in the test pool can enter the pressure sensor from the first interface through the second interface. When the device for testing the stability of the chemicals is used for testing the stability of the chemicals in an inert atmosphere, the pressure in the testing pool can be monitored in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical testing, in particular to a device for testing the stability of chemicals. Background Art

[0002] The chemical stability test is to place a test pool containing the chemical in a heating furnace, use the heating furnace to heat the chemical, and monitor the temperature of the test pool through a temperature sensor. When the temperature sensor detects that the temperature of the test pool is different from the temperature provided by the heating furnace, it can be determined that the chemical has undergone thermal decomposition at this temperature, thereby determining the thermal stability of the chemical.

[0003] When conducting chemical stability tests, some chemicals will decompose and produce gas, which will generate a certain pressure in the test pool. The accumulation of pressure may cause accidents. Therefore, in order to prevent accidents, it is necessary to monitor the pressure in the test pool in real time.

[0004] The existing devices for testing chemical stability usually connect a test cell to a pressure sensor and monitor the pressure in the test cell through the pressure sensor. However, some chemical stability tests need to be performed under an inert atmosphere. The existing solution is to weigh the sample in a box with an inert atmosphere, then put the weighed sample into the test cell and seal the test cell with a lid to protect the inert atmosphere in the test cell. Since the test cell is sealed by the lid, the pressure in the test cell cannot be monitored by the pressure sensor. Utility Model Content

[0005] In order to solve the problems mentioned in the above background technology, the utility model provides a device for testing the stability of chemicals.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A device for testing the stability of chemicals, comprising a test pool, a pressure sensor, a three-way interface, a pressure relief valve, a three-way valve, a vacuum system and an inert gas cylinder, wherein the three-way interface comprises a first interface, a second interface and a third interface, the three-way valve comprises a first valve port, a second valve port and a third valve port, the pressure relief valve comprises a pressure relief valve inlet for gas to enter and a pressure relief valve outlet for pressure relief of the gas, the test pool is connected to the first interface, the second interface is connected to the pressure sensor, the third interface is connected to the pressure relief valve inlet, the gas in the test pool can enter the pressure sensor via the first interface through the second interface, and can also enter the pressure relief valve inlet via the first interface through the third interface, the pressure relief valve outlet is detachably connected to the first valve port, the second valve port is connected to the vacuum system, the third valve port is connected to the inert gas cylinder, the first valve port and the second valve port are communicable, the first valve port and the third valve port are communicable, and the second valve port and the third valve port are not communicable.

[0008] Preferably, a drying device is further provided between the third valve port and the inert gas cylinder.

[0009] Preferably, a deoxygenation device is also provided between the third valve port and the inert gas cylinder.

[0010] Preferably, a bubbler is further provided between the third valve port and the inert gas cylinder.

[0011] Preferably, a first valve is further provided between the pressure relief valve outlet and the first valve port.

[0012] Preferably, a second valve is further provided between the third valve port and the inert gas cylinder.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Since the test pool of the device for testing the stability of chemicals in the above-mentioned embodiment of the utility model is connected with the pressure sensor and the pressure relief valve, the pressure relief valve is detachably connected to one end of the three-way valve, and the other two ends of the three-way valve are respectively connected to the vacuum pumping system and the inert gas cylinder. The test pool is evacuated by the vacuum pumping system, and inert gas is provided to the test pool through the inert gas cylinder. After the vacuum is evacuated and the inert gas is provided, the connection between the pressure relief valve and the three-way valve is removed, and the chemical stability test is performed, and the pressure sensor is used to monitor the pressure in the test pool. Therefore, when the device for testing the stability of chemicals in the above-mentioned embodiment of the utility model is used to test the stability of chemicals under an inert atmosphere, the pressure in the test pool can be monitored in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 It is the principle diagram of the utility model;

[0017] In the figure: 1 test cell, 2 pressure sensor, 3 three-way interface, 31 first interface, 32 second interface, 33 third interface, 4 pressure relief valve, 41 pressure relief valve inlet, 42 pressure relief valve outlet, 5 three-way valve, 51 first valve port, 52 second valve port, 53 third valve port, 6 vacuum system, 7 inert gas cylinder, 8 drying device, 9 deoxygenation device, 10 bubbler, 11 first valve, 12 second valve. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example

[0020] Reference Figure 1 A device for testing the stability of chemicals, comprising a test pool 1, a pressure sensor 2, a three-way interface 3, a pressure relief valve 4, a three-way valve 5, a vacuum system 6 and an inert gas cylinder 7. The three-way interface 3 comprises a first interface 31, a second interface 32 and a third interface 33. The three-way valve 5 is an existing valve capable of realizing three-way connection, comprising a first valve port 51, a second valve port 52 and a third valve port 53. The test pool 1 is used to hold chemicals, and the test pool 1 has an opening for loading chemicals. The pressure relief valve 4 is used to release the pressure of the gas in the test pool 1 after testing the stability of the chemicals. The pressure relief valve 4 has a pressure relief valve inlet 41 for gas to enter and a pressure relief valve outlet 42 for releasing the pressure of the gas.

[0021] The opening of the test pool 1 is connected to the first interface 31, the second interface 32 is connected to the pressure sensor 2, and the third interface 33 is connected to the pressure relief valve inlet 41. The gas decomposed by the chemical in the test pool 1 can enter the pressure sensor 2 from the first interface 31 through the second interface 32. The pressure sensor 2 monitors the pressure of the gas entering it, thereby monitoring the pressure in the test pool 1. The gas decomposed by the chemical in the test pool 1 can also enter the pressure relief valve inlet 41 from the first interface 31 through the third interface 33. After testing the stability of the chemical, the pressure relief valve outlet 42 is opened to release the pressure of the gas in the test pool 1. The pressure relief valve outlet 42 is detachably connected to the first valve port 51, the second valve port 52 is connected to the vacuum system 6, and the third valve port 53 is connected to the inert gas cylinder 7. The first valve port 51 and the second valve port 52 can be connected, the first valve port 51 and the third valve port 53 can be connected, and the second valve port 52 and the third valve port 53 cannot be connected. The vacuum system 6 is used to vacuum the test pool 1 before the chemical stability test is performed, and the inert gas cylinder 7 is used to provide inert gas into the test pool 1 before the chemical stability test is performed.

[0022] Since the test pool 1 of the device for testing the stability of chemicals in the above embodiment of the utility model is connected with the pressure sensor 2 and the pressure relief valve 4, the pressure relief valve 4 is detachably connected to one end of the three-way valve 5, and the other two ends of the three-way valve 5 are respectively connected to the vacuum system 6 and the inert gas cylinder 7, the test pool 1 is evacuated by the vacuum system 6, and the inert gas is provided to the test pool 1 by the inert gas cylinder 7. After the vacuum is evacuated and the inert gas is provided, the connection between the pressure relief valve 4 and the three-way valve 5 is removed, and then the chemical stability test is performed, and the pressure sensor 2 is used to monitor the pressure in the test pool 1. Therefore, when the device for testing the stability of chemicals in the above embodiment of the utility model is used to test the stability of chemicals under an inert atmosphere, the pressure in the test pool 1 can be monitored in real time.

[0023] Example 2

[0024] Reference Figure 1 The difference between this embodiment and embodiment 1 is that a drying device 8 is further provided between the third valve port 53 and the inert gas cylinder 7. The drying device 8 is used to dry the inert gas from the inert gas cylinder 7. The drying device 8 can be made of calcium oxide or the like.

[0025] Example 3

[0026] Reference Figure 1 The difference between this embodiment and embodiment 1 is that a deoxygenation device 9 is further provided between the third valve port 53 and the inert gas cylinder 7. The deoxygenation device 9 is used to deoxygenate the inert gas from the inert gas cylinder 7. The deoxygenation device 9 can be made of Na, K alloy, etc.

[0027] Example 4

[0028] Reference Figure 1 The difference between this embodiment and embodiment 1 is that a bubbler 10 is further provided between the third valve port 53 and the inert gas cylinder 7. The bubbler 10 is filled with liquid, such as paraffin oil, etc. By observing the generation of bubbles in the bubbler 10, it can be determined whether the inert gas cylinder 7 provides inert gas. In addition, by observing the generation rate of bubbles in the bubbler 10, the rate at which the inert gas cylinder 7 provides inert gas can also be determined. When it is observed that the rate at which the inert gas cylinder 7 provides inert gas is too large, the opening of the pressure regulating valve on the inert gas cylinder 7 can be reduced, thereby reducing the rate at which the inert gas cylinder 7 provides inert gas. When it is observed that the rate at which the inert gas cylinder 7 provides inert gas is too small, the opening of the pressure regulating valve on the inert gas cylinder 7 can be increased, thereby increasing the rate at which the inert gas cylinder 7 provides inert gas.

[0029] Example 5

[0030] Reference Figure 1 The difference between this embodiment and embodiment 1 is that a first valve 11 is further provided between the pressure relief valve outlet 42 and the first valve port 51. The first valve 11 is used to open or disconnect the connection between the pressure relief valve outlet 42 and the first valve port 51.

[0031] Example 6

[0032] Reference Figure 1 The difference between this embodiment and embodiment 1 is that a second valve 12 is further provided between the third valve port 53 and the inert gas cylinder 7. The second valve 12 is used to open or disconnect the connection between the third valve port 53 and the inert gas cylinder 7. Preferably, the second valve 12 is closer to the inert gas cylinder 7 than the drying device 8, the deoxygenating device 9 and the bubbler 10, so that the inert gas can be stopped from being introduced into the drying device 8, the deoxygenating device 9 and the bubbler 10 after the second valve 12 is disconnected.

[0033] Working principle: First, open the first valve 11 and the pressure relief valve 4, rotate the three-way valve 5 to connect the first valve port 51 and the second valve port 52, start the vacuum system 6, and use the vacuum system 6 to vacuum the test pool 1. After the vacuum is exhausted, open the second valve 12, rotate the three-way valve 5 again to connect the first valve port 51 and the third valve port 53, adjust the pressure regulating valve on the inert gas cylinder 7, and let the inert gas in the inert gas cylinder 7 pass into the test pool 1. The amount of inert gas passed into the test pool 1 is suitable to make the pressure in the test pool 1 normal pressure. After the inert gas is replaced, close the second valve 12, rotate the three-way valve 5 again, connect the first valve port 51 and the second valve port 52 to prevent outside air from entering the pipeline between the third valve port 53 and the inert gas cylinder 7, then close the first valve 11, and turn off the vacuum system 6, then close the pressure relief valve 4 and remove the connection between the pressure relief valve outlet 42 and the first valve port 51. Next, the chemical stability is tested under an inert atmosphere, and the pressure in the test pool 1 is monitored by the pressure sensor 2. After the test, the pressure relief valve 4 is opened to relieve the pressure in the test pool 1.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for testing the stability of chemicals, characterized in that: The invention comprises a test pool (1), a pressure sensor (2), a three-way interface (3), a pressure relief valve (4), a three-way valve (5), a vacuum system (6) and an inert gas cylinder (7), wherein the three-way interface (3) comprises a first interface (31), a second interface (32) and a third interface (33), the three-way valve (5) comprises a first valve port (51), a second valve port (52) and a third valve port (53), the pressure relief valve (4) comprises a pressure relief valve inlet (41) for gas to enter and a pressure relief valve outlet (42) for relieving the pressure of the gas, the test pool (1) is connected to the first interface (31), the second interface (32) is connected to the pressure sensor (2), the third interface (33) is connected to the pressure relief valve inlet (41), and the pressure relief valve outlet (42) is connected to the pressure relief valve outlet (42). ), the gas in the test pool (1) can enter the pressure sensor (2) from the first interface (31) through the second interface (32), and can also enter the pressure relief valve inlet (41) from the first interface (31) through the third interface (33), the pressure relief valve outlet (42) is detachably connected to the first valve port (51), the second valve port (52) is connected to the vacuum pumping system (6), the third valve port (53) is connected to the inert gas cylinder (7), the first valve port (51) and the second valve port (52) are communicable, the first valve port (51) and the third valve port (53) are communicable, and the second valve port (52) and the third valve port (53) are not communicable.

2. The device for testing the stability of chemicals according to claim 1, characterized in that: A drying device (8) is also provided between the third valve port (53) and the inert gas cylinder (7).

3. The device for testing the stability of chemicals according to claim 1, characterized in that: A deoxygenation device (9) is also provided between the third valve port (53) and the inert gas cylinder (7).

4. The device for testing the stability of chemicals according to claim 1, characterized in that: A bubbler (10) is also provided between the third valve port (53) and the inert gas cylinder (7).

5. The device for testing the stability of chemicals according to claim 1, characterized in that: A first valve (11) is also provided between the pressure relief valve outlet (42) and the first valve port (51).

6. The device for testing the stability of chemicals according to claim 1, characterized in that: A second valve (12) is also provided between the third valve port (53) and the inert gas cylinder (7).

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