A sample feeding device for a gas evolution meter

Abstract

The utility model provides a kind of gas evolution determinator sample feeding device, it is related to detection instrument field, it is characterized by, including sample chamber, sample chamber bottom has the through port for connecting gas evolution determinator reaction bucket, sample chamber bottom outer edge is equipped with the connecting base for connecting the reaction bucket;Feeding cylinder is fixed in the sample chamber top and with sample chamber inside intercommunication;Support frame is fixed on sample chamber, located the feeding cylinder both sides;Pressing rod support straddles the feeding cylinder top, it is hinged with support frame in one end, and it is detachably connected with support frame in other end;Pressing ring is located in the directly above feeding cylinder, and pressing ring is connected with pressing rod support in the way of being able to move up and down;The utility model can not only guarantee that calcium carbide material is quickly put through feeding cylinder, but also can guarantee the sealing property of pressing ring and feeding cylinder, and can effectively avoid the abrasion caused by pressing ring and feeding port repeatedly screwing even influence sealing, guarantee the accuracy of calcium carbide detection result, improve the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of testing instrument technology, specifically to a sample feeding device for a gas emission measuring instrument. Background Technology

[0002] In the actual production of polyvinyl chloride using the calcium carbide method, it is first necessary to measure the gas evolution of the bulk raw material calcium carbide entering the plant. By accurately measuring the average gas evolution of each truckload of calcium carbide, the quality of calcium carbide products from each manufacturer can be evaluated, the acetylene production process data can be adjusted, the actual consumption of each ton of resin powder can be calculated in a timely and accurate manner, and the economic benefits of the finished product can be determined.

[0003] According to the requirements of GB / T 10665-2004 "Calcium Carbide (Calcium Carbide)" for determination, firstly, about 50g of calcium carbide particles, which are gradually crushed to a particle size of 5-12mm and with clearly visible ferrosilicon blocks removed, accurate to 0.1g, need to be placed into the sample chamber quickly, the lid should be closed and tightened immediately, and the handle should be turned to completely immerse the sample in water.

[0004] Existing calcium carbide gas emission analyzers, such as the commonly used HALJD-19 model, use an upward-opening feed cylinder with a threaded inlet, typically made of rigid PVC plastic. To ensure airtightness and prevent acetylene gas leakage that could lead to lower readings, a detachable cap with stainless steel threads is fitted at the inlet, which is screwed shut onto the feed cylinder. However, with frequent use, especially when analyzing a large number of samples daily, repeated screwing and turning of the cap can cause wear on the feed cylinder threads. Over time, this can lead to a leaky seal between the cap and the sample chamber, resulting in acetylene gas leakage and affecting the accuracy of the analysis. Therefore, in actual production, the entire sample chamber often needs to be replaced periodically, which is costly.

[0005] Therefore, how to avoid the above-mentioned loss problems while ensuring airtightness, and at the same time not affecting the sample addition operation, is the problem that this application urgently needs to solve. Utility Model Content

[0006] This invention provides a sample feeding device for a gas emission measuring instrument to address the aforementioned problems existing in the prior art.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a sample feeding device for a gas emission measuring instrument, characterized in that it includes... The sample chamber has an opening at the bottom for connecting to the reaction barrel of the gas emission measuring instrument, and a connecting base for connecting the reaction barrel is provided on the outer edge of the bottom of the sample chamber. The feed cylinder is fixed to the top of the sample chamber and communicates with the interior of the sample chamber. A support frame is fixed on the sample chamber and located on both sides of the feed cylinder; A pressure rod bracket spans across the top of the feed cylinder, with one end hinged to the support frame and the other end detachably connected to the support frame; The pressure cap is located directly above the feed cylinder and is connected to the pressure rod bracket in a way that allows it to move up and down.

[0008] Furthermore, the inner side of the pressure cap is provided with a sealing element that is compatible with the inlet of the feed cylinder.

[0009] Furthermore, the pressure rod support has a gate-shaped structure.

[0010] Furthermore, one end of the pressure rod bracket is hinged to the support frame via a pin, and the other end is detachably connected to the support frame via a pin.

[0011] Furthermore, the pressure cap is connected to the pressure rod bracket via a connecting rod and can move up and down relative to the pressure rod bracket via the connecting rod.

[0012] Furthermore, the outer surface of the connecting rod is provided with external threads, the connecting rod passes through the pressure rod bracket and is threadedly connected to the pressure rod bracket, and the lower end of the connecting rod is rotatably connected to the pressure cap.

[0013] Furthermore, the upper end of the connecting rod is connected to a gripping rod, which is used to control the connecting rod to rotate in or out relative to the pressure rod bracket.

[0014] Furthermore, the connecting base is detachably connected to the reaction vessel via bolts.

[0015] Furthermore, the sample chamber is also equipped with a sealing door for controlling whether it is connected to the feed cylinder. The sealing door is rotatably installed in the sample chamber, and a feed handle is provided outside the sample chamber for controlling the sealing door to flip so as to realize that the feed cylinder and the sample chamber are connected or not connected.

[0016] Furthermore, the sealing gate is rotatably connected to the sample chamber via a rotating shaft. The rotating shaft extends to the outside of the sample chamber and is fixed to the feed handle. A torsion spring is fitted around the outside of the rotating shaft to keep the sealing gate blocking the lower port of the feed cylinder when no external force is applied, thus achieving a state where the feed cylinder and the sample chamber are not connected. The beneficial effects of this utility model are as follows: By setting up the sample chamber, feeding cylinder, support frame, pressure rod bracket, and the position and connection relationship with the pressure cap, this utility model can ensure the rapid feeding of calcium carbide material through the feeding cylinder, ensure the sealing of the pressure cap and the feeding cylinder, and effectively avoid wear and even affect the seal caused by repeated twisting of the pressure cap and the feeding port, thus ensuring the accuracy of calcium carbide test results and improving the service life of the equipment. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present invention (sealed state); Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention (sample loading state); Figure 3 This is a schematic diagram of the installation structure of the feeding device of this utility model on the gas generation measuring instrument; Figure 4 This is a schematic diagram of the installation structure of a door sealing device according to an embodiment of the present invention (sealed state). Figure 5 This is a schematic diagram of the installation structure (conduction state) of a door sealing device according to an embodiment of this utility model. In the diagram: 1. Feed cylinder, 2. Support frame, 3. Pressure rod bracket, 4. Pressure cap, 5. Connecting rod, 6. Holding rod, 7. Sample chamber, 71. Sealing door, 72. Feed handle, 8. Connecting base, 81. Bolt hole, 91. Hinge pin, 92. Connecting pin, 10. Reaction vessel. Detailed Implementation

[0018] The principles and features of this utility model are described below. The embodiments given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0019] like Figures 1-5 As shown, the sample feeding device of the gas emission meter in this embodiment serves as the feeding mechanism for the reaction tank 10 of the gas emission meter, and includes... The sample chamber 7 is specifically a box structure. The bottom of the sample chamber 7 has an opening for connecting to the reaction barrel 10 of the gas emission measuring instrument. The outer edge of the bottom of the sample chamber 7 is provided with a connecting base 8 for connecting the reaction barrel 10. Specifically, it is a disc-shaped base with a diameter of 16cm, a plate thickness of 5mm, and a hole in the middle, and is drilled with bolt holes for connecting the reaction barrel 10 by bolts. Feed cylinder 1 is fixed to the top of the sample chamber 7 and communicates with the inside of the sample chamber 7. Feed cylinder 1 has a diameter of 6cm, a height of 4cm, and a wall thickness of 5mm. The inside and outside of the box body and feed cylinder 1 are smooth and flat, and the welds are polished. The support frame 2 is fixed on the sample chamber 7 and located on both sides of the feed cylinder 1, specifically using two sets of vertical stainless steel sheets; The pressure rod bracket 3 spans across the feed cylinder 1. Specifically, the pressure rod bracket 3 has a U-shaped structure and is made of a 6cm high right-angled inverted U-shaped stainless steel sheet. One end of its lower part is hinged to the support frame 2 through a hinge pin 91, and the other end is connected to the pressure rod bracket 3 and the support frame 2 through a connecting pin 92, realizing a detachable connection between the pressure rod bracket 3 and the support frame 2. The pressure rod bracket 3 has a 1.5cm diameter circular hole in the middle and is threaded. Both the hinge pin 91 and the connecting pin 92 are made of stainless steel rods with a length of 4.5cm and a diameter of 0.8cm. The pressure cap 4, located directly above the feed cylinder 1, is a circular pressure cap with a thickness of 5mm and a diameter of 7cm. The bottom of the circular pressure cap is concave, and the edge is raised with a thickness of 3mm and a height of 5mm. Inside, a 3mm thick silicone gasket is fitted as a sealing element to ensure the sealing between the pressure cap 4 and the feed cylinder 1 when the pressure cap 4 is pressed down to abut against it. A cylindrical stainless steel block with a height of 1.5cm and a diameter of 2cm is welded to the middle of the upper part of the pressure cap, and a hole with a diameter of 1.5cm and a depth of 1cm is drilled in the middle and threaded. The pressure cap 4 is connected to the pressure rod bracket 3 in a way that allows it to move up and down, so that the pressure cap 4 can move closer to or further away from the inlet of the feed cylinder 1. Specifically, in this embodiment, the pressure cap 4 is connected to the pressure rod bracket 3 via a connecting rod 5 and can move up and down relative to the pressure rod bracket 3 via the connecting rod 5. The outer surface of the connecting rod 5 is provided with an external thread. The connecting rod 5 passes through the pressure rod bracket 3 and is threadedly connected to the pressure rod bracket 3. The lower end of the connecting rod 5 is rotatably connected to the pressure cap 4. The upper end of the connecting rod 5 is connected to a gripping rod 6, which is used to control the connecting rod 5 to rotate in or out relative to the pressure rod bracket 3.

[0020] In addition, a sealing door 71 is provided inside the sample chamber 7 to control whether it is connected to the feed cylinder 1. Specifically, it is located in the upper part of the sample chamber 7, close to the bottom of the feed cylinder 1. The sealing door 71 is rotatably installed inside the sample chamber 7, and a feed handle 72 is provided outside the sample chamber 7 to control the rotation of the sealing door 71 to achieve connection or non-connection between the feed cylinder 1 and the sample chamber 7. The sealing door 71 is rotatably connected to the sample chamber 7 via a rotating shaft. The rotating shaft extends to the outside of the sample chamber 7 and is fixed to the feed handle 72. A torsion spring is sleeved on the outside of the rotating shaft to keep the sealing door 71 blocking the lower port of the feed cylinder 1 when no external force is applied, so as to achieve a state where the feed cylinder 1 and the sample chamber 7 are not connected (this installation method and function of the torsion spring is existing technology and will not be described in detail here).

[0021] The procedure for installing the feeding device of this embodiment onto the reaction vessel 10 of the calcium carbide gas generation analyzer is as follows: Apply a thin layer of sealant to the opening of the reaction vessel of the calcium carbide gas generation analyzer, and then install a 3mm thick rubber annular gasket on it according to the diameter of the opening. Apply sealant to the annular gasket, align the bolt holes on the device connecting base with the bolt holes on the reaction vessel 10, place the feeding device, and tighten it with fastening bolts (not shown in the figure). This completes the installation of the feeding device on the reaction vessel 10. See Figure 3 As shown. At this time, the sealing gate is horizontally positioned at the bottom outlet of the feed cylinder 1, isolating the feed cylinder 1 from the sample chamber 7. Figure 4 As shown.

[0022] When adding the sample, remove the connecting pin 92, and rotate the pressure rod bracket 3 around the hinge pin 91, so that the pressure rod bracket 3 and the pressure cap 4 flip towards the side of the feed cylinder 1. Figure 2As shown, the upper inlet of feed cylinder 1 is exposed, and the weighed calcium carbide particles are quickly poured into feed cylinder 1. After sampling, the pressure rod support 3 is flipped in the opposite direction around the hinge pin 91 to return to its original position. Figure 1 As shown, insert the connecting pin 92 to fix the pressure rod bracket 3 to the support frame 2. At this time, the pressure cap 4 is directly above the feed cylinder 1. Quickly rotate the gripping rod 6 to rotate the connecting rod 5 downwards to control the pressure cap 4 to move downwards until the pressure cap 4 tops the feed cylinder 1 and is tightened slightly. The sealing element inside the pressure cap 4 achieves a seal on the feed cylinder 1. After sealing, move the feed handle 72 to open the sealing door 71, see... Figure 5 As shown, the calcium carbide sample in the feed cylinder 1 falls into the reaction tank 10 to react and be measured.

[0023] The connection between the pressure cap 4 and the pressure rod bracket 3, as well as the connection between the pressure rod bracket 3 and the support frame 2, can ensure the rapid feeding of calcium carbide material through the feed cylinder 1, ensure the sealing between the pressure cap 4 and the feed cylinder 1, and effectively avoid wear caused by repeated twisting of the pressure cap and the feed port, which may even affect the seal. This ensures the accuracy of calcium carbide testing results and improves the service life of the equipment.

Claims

1. A sample feeding device for a gas emission measuring instrument, characterized in that, include The sample chamber (7) has an opening at the bottom for connecting to the reaction barrel (10) of the gas emission measuring instrument, and a connecting base (8) for connecting the reaction barrel (10) is provided on the outer edge of the bottom of the sample chamber (7). The feed cylinder (1) is fixed to the top of the sample chamber (7) and communicates with the interior of the sample chamber (7); The support frame (2) is fixed on the sample chamber (7) and located on both sides of the feed cylinder (1); The pressure rod bracket (3) spans across the feed cylinder (1), with one end hinged to the support frame (2) and the other end detachably connected to the support frame (2); The pressure cap (4) is located directly above the feed cylinder (1) and is connected to the pressure rod bracket (3) in a way that allows it to move up and down.

2. The sample feeding device for the gas emission measuring instrument according to claim 1, characterized in that, The inner side of the pressure cap (4) is provided with a sealing element that is compatible with the opening of the feed cylinder (1).

3. The sample feeding device for the gas emission measuring instrument according to claim 1, characterized in that, The pressure rod support (3) has a gate-shaped structure.

4. The sample feeding device for the gas emission measuring instrument according to claim 1 or 3, characterized in that, One end of the pressure rod bracket (3) is hinged to the support frame (2) by a pin, and the other end is detachably connected to the support frame (2) by a pin.

5. The sample feeding device for the gas emission measuring instrument according to claim 1, characterized in that, The pressure cap (4) is connected to the pressure rod bracket (3) via a connecting rod (5) and can move up and down relative to the pressure rod bracket (3) via the connecting rod (5).

6. The sample feeding device for the gas emission measuring instrument according to claim 5, characterized in that, The outer surface of the connecting rod (5) is provided with an external thread. The connecting rod (5) passes through the pressure rod bracket (3) and is threadedly connected to the pressure rod bracket (3). The lower end of the connecting rod (5) is rotatably connected to the pressure cap (4).

7. The sample feeding device for the gas emission measuring instrument according to claim 6, characterized in that, The upper end of the connecting rod (5) is connected to a gripping rod (6) for controlling the connecting rod (5) to rotate in or out relative to the pressure rod bracket (3).

8. The sample feeding device for the gas emission measuring instrument according to claim 1, characterized in that, The connecting base (8) is detachably connected to the reaction vessel (10) by bolts.

9. The sample feeding device for the gas emission measuring instrument according to claim 1, characterized in that, The sample chamber (7) is also provided with a sealing door (71) for controlling whether it is connected to the feed cylinder (1). The sealing door (71) is rotatably installed in the sample chamber (7), and a feed handle (72) is provided outside the sample chamber (7) for controlling the sealing door (71) to flip so as to realize that the feed cylinder (1) and the sample chamber (7) are connected or not connected.

10. The sample feeding device for the gas emission measuring instrument according to claim 9, characterized in that, The sealing door (71) is rotatably connected to the sample chamber (7) via a rotating shaft. The rotating shaft extends to the outside of the sample chamber (7) and is fixed to the feed handle (72). A torsion spring is sleeved on the outside of the rotating shaft to keep the sealing door (71) blocking the lower port of the feed cylinder (1) when there is no external force, so as to achieve a state in which the feed cylinder (1) and the sample chamber (7) are not connected to each other.

Images