Vacuum sampling device

Abstract

The utility model discloses a vacuum sampling device which comprises a sampling fixer and a crucible, the sampling fixer comprises a connecting rod and a base, one end of the connecting rod penetrates through the base, the other end of the connecting rod is provided with a handle, the connecting rod is provided with a first through hole, the crucible is provided with a plug pin, and the crucible is connected with the connecting rod through the plug pin. The bolt penetrates through the connecting rod through the first through hole and is in sliding connection. The crucible made of magnesium oxide does not react with molten steel at high temperature, so that the problem of molten steel component pollution caused by melting of a traditional steel casting mold due to too long retention time can be solved. By thickening the bottom of the crucible and thickening and weighting the bottom of the sampling fixer, the crucible can easily sink into molten steel for sampling by breaking through the buoyancy of the molten steel. The connecting rod and the handle of the sampling fixer are arranged in a hanging manner, and the crucible is fixed by the bolt and cannot shake, so that the sampling stability is improved. The crucible is detachably connected with the sampling fixer, so that the crucible can be conveniently and rapidly replaced for continuous sampling, and the sampling fixer can be repeatedly used.

Description

Technical Field

[0001] This utility model belongs to the field of sampling device technology, and in particular relates to a vacuum sampling device. Background Technology

[0002] In the smelting process, it is frequently necessary to test the composition of molten steel to determine its quality. Traditional sampling molds are steel casting molds, which have several problems: 1. If the sampling speed is too slow, the mold may melt, affecting the composition and quality of the molten steel; 2. Molten steel samples often stick to the steel casting mold after solidification, making demolding difficult; 3. The cast steel mold has a relatively low weight, and when the density of the molten steel is similar to that of the mold, the mold tends to float on the molten steel and cannot sink for sampling. Therefore, a sampling device that can solve these problems is needed. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a vacuum sampling device.

[0004] This utility model is achieved through the following technical solution.

[0005] This utility model provides a vacuum sampling device, including a sampling fixture and a crucible. The sampling fixture includes a connecting rod and a base. One end of the connecting rod passes through the base, and the other end of the connecting rod is provided with a handle. A first through hole is provided on the connecting rod. A pin is provided on the crucible. The crucible is connected to the connecting rod through the pin. The pin passes through the first through hole and is slidably connected.

[0006] Preferably, the crucible is provided with a second through hole, and the pin passes through the second through hole to connect with the crucible.

[0007] Preferably, the crucible sidewall is provided with a first groove.

[0008] Preferably, the base is provided with a placement groove, and the crucible extends into the placement groove.

[0009] Preferably, the base sidewall is provided with a second slot.

[0010] Preferably, a third through hole is provided on the handle.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. Crucibles made of magnesium oxide do not react with molten steel at high temperatures, which can solve the problem of steel composition contamination caused by the melting of traditional cast steel molds due to prolonged holding time.

[0013] 2. Solves the problem of molten steel sticking to the mold that often occurs in traditional cast steel molds, and improves sampling speed.

[0014] 3. By thickening the bottom of the crucible and the bottom of the sampling fixture, the crucible can easily sink into the molten steel to take samples, thus overcoming the buoyancy of the molten steel.

[0015] 4. The sampling fixture is mounted on the connecting rod and handle, and the crucible is fixed with a pin to prevent it from shaking, thus improving the stability during sampling.

[0016] 5. The crucible and sampling holder are detachably connected, facilitating quick crucible replacement for continuous sampling, and the sampling holder is reusable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the sampling and fixing device of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the crucible of this utility model;

[0020] In the diagram: 1-Crucible, 11-Second through hole, 12-First slot, 2-Connecting rod, 21-First through hole, 3-Base, 31-Placement slot, 32-Second slot, 4-Handle, 41-Third through hole, 5-Pin. Detailed Implementation

[0021] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0022] Example:

[0023] like Figures 1 to 3 As shown, a vacuum sampling device includes a sampling fixture and a crucible 1. The sampling fixture includes a connecting rod 2 and a base 3. One end of the connecting rod 2 passes through the base 3, and the other end of the connecting rod 2 is provided with a handle 4. A first through hole 21 is provided on the connecting rod 2. A pin 5 is provided on the crucible 1. The crucible 1 is connected to the connecting rod 2 through the pin 5. The pin 5 passes through the first through hole 21 and is slidably connected to the connecting rod 2.

[0024] The thickness of the bottom of crucible 1 and base 3 can be increased according to the actual situation in order to increase the weight of the vacuum sampling device and facilitate the vacuum sampling device to sink into the molten steel for sampling.

[0025] Crucible 1 is made of magnesium oxide, which can withstand high temperatures of 1800℃ and does not react with molten steel.

[0026] The crucible 1 is provided with a second through hole 11, and two second through holes 11 are symmetrically arranged. The pin 5 passes through both second through holes 11 and is connected to the crucible 1.

[0027] The crucible 1 has a first groove 12 on its side wall. The first groove 12 is symmetrically arranged in two places. The bottom height of the first groove 12 is greater than the bottom height of the crucible 1, so as to facilitate the flow of molten steel into the crucible 1.

[0028] The base 3 is provided with a placement groove 31, and the crucible 1 is placed inside the placement groove 31.

[0029] The base 3 has a second slot 32 on its side wall. The second slot 32 is symmetrically arranged in two places to avoid the pin 5.

[0030] The handle 4 is provided with a third through hole 41, which facilitates the mounting of the sampling device on the elevator of the vacuum melting furnace.

[0031] The method of using the sampling device includes the following steps:

[0032] 1. Place crucible 1 in an oven and keep it at 300 degrees Celsius for 2 hours to remove moisture;

[0033] 2. Connect and fix the crucible 1 and the sampling holder using the pin 5;

[0034] 3. Open the temperature measuring chamber of the vacuum melting furnace and hang the installed vacuum sampling device on the elevator;

[0035] 4. Close the temperature measuring chamber and then open the diaphragm valve;

[0036] 5. Operate the elevator to move the sampling device downwards until it contacts the molten steel in the furnace;

[0037] 6. After sampling is completed, operate the elevator to pull the sampling device to the sampling chamber of the vacuum melting furnace;

[0038] 7. After closing the diaphragm valve, open the sampling chamber and remove the sampling device;

[0039] 8. After the sampling device has cooled down, remove crucible 1 and break it to obtain the sample.

Claims

1. A vacuum sampling device, characterized by: The utility model relates to a sampling device, including sampling fixer and crucible (1), the sampling fixer includes connecting rod (2) and base (3), one end of connecting rod (2) is arranged through base (3), and the other end of connecting rod (2) is provided with handle (4), and first through -hole (21) is arranged on connecting rod (2), and the plug -in (5) is arranged on the crucible (1), and the crucible (1) is connected with connecting rod (2) through the plug -in (5), and the plug -in (5) is arranged through first through -hole (21) and is slidably connected with connecting rod (2).

2. A vacuum sampling device as claimed in claim 1, characterized in that: Second through -hole (11) is arranged on the crucible (1), and the plug -in (5) is arranged through second through -hole (11) and is connected with the crucible (1).

3. A vacuum sampling device as claimed in claim 1, characterized in that: First slot (12) is arranged on the side wall of the crucible (1).

4. A vacuum sampling device as claimed in claim 1, characterized in that: The base (3) is provided with a placing groove (31), and the crucible (1) is arranged in the placing groove (31).

5. A vacuum sampling device as claimed in claim 1, characterized in that: Second slot (32) is arranged on the side wall of the base (3).

6. A vacuum sampling device as claimed in claim 1, characterized in that: Third through -hole (41) is arranged on the handle (4).

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