Petrochemical raw material rapid detection device

Abstract

The utility model relates to the technical field of petrochemical raw material detection, and discloses a petrochemical raw material rapid detection device which comprises a detector, an extraction device is arranged at the bottom of the detector, the extraction device comprises a collection pipe, an extraction mechanism is connected in an air cavity, an air inlet is formed in one end, away from the extraction mechanism, of the collection pipe in a penetrating mode, and an air outlet is formed in the other end of the collection pipe. The outer wall of the end, close to the air inlet, of the collecting pipe is fixedly connected with a suction pipe communicated with the air inlet, a negative pressure blocking mechanism is connected into the suction pipe, the side, close to the detector, of the middle of the collecting pipe is fixedly connected and communicated with a connecting pipe, an air guide assembly is connected into the connecting pipe, and the end, away from the collecting pipe, of the connecting pipe is communicated with the detector. According to the rapid detection device for the petrochemical raw materials, the negative pressure blocking mechanism is driven to move through negative pressure, so that natural gas needing to be detected is sucked into the gas cavity through the suction pipe, the natural gas in the gas cavity is guided into the detector for detection through the gas guide assembly, air is prevented from being mixed with the natural gas in the gas cavity, and the detection effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical raw material detection, in particular to a petrochemical raw material rapid detection device. Background Art

[0002] Petrochemical raw materials mainly come from oil and natural gas. These raw materials can be converted into a variety of chemical products through different chemical reactions and processing flows, and are widely used in plastics, fibers, rubber, solvents, coatings, medicines and other fields; petrochemical raw materials mainly include oil and its distillates, condensate oil, natural gas, refinery gas, etc. Before these raw materials are used, the composition of the raw materials needs to be quickly tested to avoid internal doping with other substances that affect normal production and use. For example, before natural gas is collected and stored, it needs to be sampled and quickly tested to avoid mixing other components in the gas, which may lead to explosion risks during use.

[0003] For example, the patent with announcement number CN212964739U discloses a natural gas sampling and rapid detection device, which includes a detection chamber, a handle provided on the lower outer surface of the detection chamber, a natural gas detector provided on the upper outer surface of the detection chamber, an air bag provided on one outer surface of the detection chamber, a trachea provided on the other outer surface of the detection chamber, a sealing cover provided on the outer surface of one end of the trachea, and lifting straps provided on the outer surfaces of both ends of the handle. The air bag facilitates the absorption and discharge of natural gas during use, the handle facilitates the picking up of the gas during use and facilitates the operation during collection, and the lifting strap facilitates the carrying of the detection device during use. The natural gas collection and detection device has a simple structure, is easy to operate, is easy to carry during use, facilitates the discharge of natural gas, and has a better effect than traditional methods.

[0004] However, the rapid detection device in the above technology still has the following problems:

[0005] Although the air bag can be used to conveniently absorb and discharge natural gas, during absorption, the compressed air bag can only discharge the gas in the air bag, but cannot discharge the air in the detection chamber, causing the absorbed natural gas to mix with the gas in the detection chamber, affecting the detection effect of the detector. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the present invention provides a rapid detection device for petrochemical raw materials, for example, it can completely discharge the gas in the detection chamber as much as possible to avoid other gases mixing with natural gas when extracting natural gas, thereby affecting the detection accuracy.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rapid detection device for petrochemical raw materials, comprising a detector, an extraction device is provided at the bottom of the detector, the extraction device comprises a collection tube, an air cavity is provided in the collection tube, an extraction mechanism is connected to the air cavity, an air inlet is penetrated at one end of the collection tube away from the extraction mechanism, an extraction tube connected to the air inlet is fixedly connected to the outer wall of the collection tube near the air inlet, a negative pressure sealing mechanism is connected to the extraction tube, a connecting tube is fixedly connected and connected to the side of the middle position of the collection tube near the detector, an air guide component is connected to the connecting tube, an end of the connecting tube away from the collection tube is connected to the detector, and an exhaust hole connected to the air cavity is penetrated at the end of the collection tube away from the extraction tube.

[0008] Furthermore, the extraction mechanism includes a piston and a plug rod, the piston is slidably connected to the inner wall of the air cavity, one end of the plug rod is fixedly connected to the end of the piston away from the air inlet, and the end of the plug rod away from the piston passes through the end of the collection tube away from the air inlet and is slidably connected to the collection tube.

[0009] Furthermore, one end of the stopper rod away from the piston is fixedly connected to a rod handle, and the rod handle abuts against the outer wall of the collection tube.

[0010] Furthermore, the negative pressure sealing mechanism includes a sealing ring, a sealing ball, a negative pressure spring and a fixed rod, both ends of the fixed rod are fixedly connected to the inner wall of the air inlet, the middle position of the fixed rod close to the suction tube side is fixedly connected to the negative pressure spring, the other end of the negative pressure spring is fixedly connected to the sealing ball, the outer wall of the sealing ring is fixedly connected to the inner wall of the suction tube, and the end of the sealing ball away from the negative pressure spring is against the end of the sealing ring close to the fixed rod.

[0011] Furthermore, the detector is fixedly connected to and communicated with an external threaded tube at one end close to the collection tube, a threaded groove is provided on the inner wall of the connecting tube away from the end of the collection tube, the external threaded tube is threadedly connected to the threaded groove, and the gas guide component is located below the external threaded tube.

[0012] Furthermore, the gas guide assembly includes a gas guide block, which is located in the connecting tube and is slidably connected to the inner wall of the connecting tube, the end of the gas guide block away from the collection tube is abutted against the external threaded tube, and a first air hole is provided on the side of the gas guide block away from the collection tube, the first air hole is connected to the external threaded tube, and a plurality of second air holes are provided through the end of the first air hole close to the collection tube, and the other ends of the plurality of second air holes are arranged at an angle and pass through the side wall of the gas guide block close to the collection tube, the end of the gas guide block close to the collection tube is matched with the inner wall of the air cavity, and the piston is slidably connected to the end of the gas guide block close to the collection tube, and a plurality of reset grooves are provided on the inner wall of the connecting tube close to the collection tube, and a reset assembly is connected to the plurality of reset grooves, and the plurality of reset assemblies are connected to the gas guide block.

[0013] Furthermore, the reset assembly includes a reset spring and a limit block, the limit block is slidably connected to the reset groove, the limit block is fixedly connected to the outer wall of the air guide block away from the collection tube, the side of the limit block close to the collection tube is fixedly connected to the reset spring, and the end of the reset spring away from the limit block is fixedly connected to the reset groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This petrochemical raw material rapid detection device generates negative pressure in the collection tube through an extraction mechanism, and uses the negative pressure to drive the movement of the negative pressure sealing mechanism, so that the natural gas to be tested is drawn into the air cavity through the extraction tube. The detector is then connected to the connecting pipe, and the natural gas in the air cavity is introduced into the detector for testing using an air guide component, thereby preventing air from mixing with the natural gas in the air cavity and improving the detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall appearance and connection structure of the utility model;

[0017] Figure 2 Based on Figure 1 A schematic cross-sectional view of the structure of the collection tube;

[0018] Figure 3 Based on Figure 2 A schematic diagram of another connection structure;

[0019] Figure 4 for Figure 3 A magnified schematic diagram of the connection structure at point A;

[0020] Figure 5 Based on Figure 2 Schematic diagram of the connection structure of the connecting pipe part;

[0021] Figure 6 It is a side view schematic diagram of the connection structure between the air guide block and the connecting pipe of the utility model.

[0022] In the figure: 1. Detector; 2. Collection tube; 3. Suction tube; 4. Connecting tube; 5. Piston; 6. Plug rod; 7. Rod handle; 8. Sealing ring; 9. Sealing ball; 10. Negative pressure spring; 11. Fixing rod; 12. Externally threaded tube; 13. Air guide block; 14. Reset spring; 15. Limit block; 101. First air hole; 102. Second air hole; 201. Air cavity; 202. Air inlet; 203. Exhaust hole; 401. Threaded groove; 402. Reset groove. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] See also Figures 1 to 6 A rapid detection device for petrochemical raw materials includes a detector 1. An extraction device is provided at the bottom of the detector 1. The extraction device includes a collection tube 2. An air cavity 201 is provided in the collection tube 2. An extraction mechanism is connected to the air cavity 201. An air inlet 202 is penetrated at one end of the collection tube 2 away from the extraction mechanism. An extraction tube 3 communicating with the air inlet 202 is fixedly connected to the outer wall of the end of the collection tube 2 near the air inlet 202. A negative pressure sealing mechanism is connected to the extraction tube 3. A connecting tube 4 is fixedly connected and communicated with a connecting tube 4 near the side of the detector 1 in the middle position of the collection tube 2. An air guide component is connected to the connecting tube 4. An end of the connecting tube 4 away from the collection tube 2 is communicated with the detector 1. An exhaust hole 203 communicating with the air cavity 201 is penetrated at the end of the collection tube 2 away from the extraction tube 3.

[0025] like Figures 1 to 6 As shown, the structure of a petrochemical raw material rapid detection device in the present invention is similar to that of an existing petrochemical raw material rapid detection device, such as a natural gas sampling rapid detection device disclosed in patent publication number CN212964739U. The main improvement of the present invention is that it can reduce the mixing of air and detection gas, thereby improving the detection effect. Figures 1 to 6 As shown, when the petrochemical raw material rapid detection device of the present invention is used, the air that may exist in the air cavity 201 is first discharged from the suction pipe 3, and then the suction pipe 3 is inserted into the natural gas storage tank that needs to be tested, and the air cavity 201 is extracted using the extraction mechanism. During the extraction process, the air in the air cavity 201 is discharged through the exhaust hole 203, so that a negative pressure is gradually formed in the air cavity 201 near one end of the suction pipe 3. The negative pressure drives the negative pressure blocking component to connect the suction pipe 3 with the air inlet 202, and now the natural gas can enter the air cavity 201. 01, after the natural gas is extracted into the air cavity 201, the extraction mechanism is stopped, and the negative pressure sealing component can automatically seal the extraction pipe 3, thereby preventing outside air from entering the air cavity 201 and mixing with the natural gas. At this time, the detector 1 is installed on the collection tube 2 through the connecting tube 4 on the top of the collection tube 2, and the detector 1 is connected to the air cavity 201. At this time, the natural gas inside the air cavity 201 can enter the detector 1 for rapid detection, thereby improving the accuracy of natural gas detection, preventing other gases from mixing with the natural gas, thereby affecting the detection accuracy, and improving the detection effect.

[0026] like Figures 1 to 3As shown, the extraction mechanism includes a piston 5 and a plug rod 6. The piston 5 is slidably connected to the inner wall of the air cavity 201. One end of the plug rod 6 is fixedly connected to the end of the piston 5 away from the air inlet 202. The end of the plug rod 6 away from the piston 5 passes through the end of the collection pipe 2 away from the air inlet 202 and is slidably connected to the collection pipe 2. When extracting natural gas, the plug rod 6 gradually pulls the piston 5 from the end of the air inlet 202 toward the exhaust hole 203, so that a negative pressure gradually forms in the air cavity 201 near the end of the extraction pipe 3. At the same time, the air in the air cavity 201 at the exhaust hole 203 is discharged from the air cavity 201 through the exhaust hole 203, and the extraction action is completed.

[0027] like Figures 1 to 3 As shown, one end of the stopper rod 6 away from the piston 5 is fixedly connected to a rod handle 7, which abuts against the outer wall of the collection tube 2. The rod handle 7 makes it easier to pull the stopper rod 6, making it more convenient to use.

[0028] like Figures 1 to 4 As shown, the negative pressure sealing mechanism includes a sealing ring 8, a sealing ball 9, a negative pressure spring 10 and a fixed rod 11. Both ends of the fixed rod 11 are fixedly connected to the inner wall of the air inlet 202. The negative pressure spring 10 is fixedly connected to the middle position of the fixed rod 11 close to the suction tube 3. The other end of the negative pressure spring 10 is fixedly connected to the sealing ball 9. The outer wall of the sealing ring 8 is fixedly connected to the inner wall of the suction tube 3. The end of the sealing ball 9 away from the negative pressure spring 10 is against the end of the sealing ring 8 close to the fixed rod 11. When the piston 5 is gradually pulled from the air inlet 202 to the exhaust hole 203 by the plug rod 6, a negative pressure will gradually form in the air cavity 201 near one end of the air inlet 202. At this time, the external high pressure can push the blocking ball 9 from the suction pipe 3 toward the air cavity 201 and compress the negative pressure spring 10, so that the blocking ring 8, the suction pipe 3, the air inlet 202 and the air cavity 201 are connected. At this time, the natural gas can enter the collection pipe 2 through the suction pipe 3 for collection. When the piston 5 stops being pulled, as the air pressure in the air cavity 201 gradually becomes equal to the pressure of the storage tank for extracting natural gas, the negative pressure spring 10 gradually rebounds on the fixing rod 11 and presses the blocking ball 9 against the blocking ring 8, thereby blocking the suction pipe 3 and preventing the detection gas in the air cavity 201 from leaking.

[0029] like Figures 1 to 3 As shown, the end of the detector 1 closest to the collection tube 2 is fixedly connected to and communicates with an externally threaded tube 12. A threaded groove 401 is formed on the inner wall of the connecting tube 4 at the end away from the collection tube 2. The externally threaded tube 12 is threadedly connected to the threaded groove 401, and the gas guide assembly is located below the externally threaded tube 12. When the detector 1 is installed on the collection tube 2, the detector 1 is connected to the collection tube 2 by twisting the externally threaded tube 12 at the bottom and the threaded groove 401, thereby squeezing the gas guide assembly, thereby connecting the detector 1 to the collection tube 2 and performing rapid natural gas detection.

[0030] like Figures 3 to 6 As shown, the gas guide assembly includes a gas guide block 13, which is located in the connecting tube 4 and is slidably connected to the inner wall of the connecting tube 4. The end of the gas guide block 13 away from the collection tube 2 is abutted against the external threaded tube 12. A first air hole 101 is provided on the side of the gas guide block 13 away from the collection tube 2. The first air hole 101 is communicated with the external threaded tube 12. A plurality of second air holes 102 are provided through the end of the first air hole 101 close to the collection tube 2. The other ends of the plurality of second air holes 102 are inclined and penetrate to the side wall of the gas guide block 13 close to the collection tube 2. The end of the gas guide block 13 close to the collection tube 2 is matched with the inner wall of the air cavity 201, and the piston 5 is slidably connected to the end of the gas guide block 13 close to the collection tube 2. A plurality of reset grooves 402 are provided on the inner wall of the connecting tube 4 close to the collection tube 2. Reset components are connected to the reset grooves 402, and the reset components are all connected to the gas guide block 13. When the external threaded tube 12 gradually moves downward from the thread groove 401, it first communicates with the first air hole 101 and multiple second air holes 102 of the gas guide block 13. As the external threaded tube 12 continues to move downward, the gas guide block 13 moves downward from the connecting tube 4, and the multiple second air holes 102 are connected to the air cavity 201. At this time, the natural gas collected in the air cavity 201 can enter the external threaded tube 12 and the detector 1 through the connecting tube 4.

[0031] like Figures 3 to 6 As shown, the reset assembly includes a reset spring 14 and a limit block 15. The limit block 15 is slidably connected to the reset groove 402. The limit block 15 is fixedly connected to the outer wall of the air guide block 13 away from the collection tube 2. The side of the limit block 15 close to the collection tube 2 is fixedly connected to the reset spring 14, and the end of the reset spring 14 away from the limit block 15 is fixedly connected to the reset groove 402. When natural gas is collected in the air cavity 201, the reset spring 14 drives the limit block 15 to slide to the top of the reset groove 402. At this time, the second air hole 102 at the bottom of the air guide block 13 is located above the air cavity 201, and cooperates with the inner wall of the collection tube 2 and the connecting tube 4, so that the second air hole 102 will not be connected with the air cavity 201, thereby preventing the gas collected in the air cavity 201 from leaking. When the external threaded tube 12 presses down the air guide block 13, the air guide block 13 is squeezed downward, so that multiple second air holes 102 are connected with the air cavity 201. At this time, the gas collected in the air cavity 201 can enter the detector 1 for detection.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A rapid detection device for petrochemical raw materials, comprising a detector (1), characterized in that: The bottom of the detector (1) is provided with an extraction device, which includes a collection tube (2), an air cavity (201) is provided in the collection tube (2), an extraction mechanism is connected in the air cavity (201), an air inlet (202) is provided through the end of the collection tube (2) away from the extraction mechanism, an extraction tube (3) is fixedly connected to the outer wall of the end of the collection tube (2) close to the air inlet (202) and connected to the air inlet (202), a negative pressure blocking mechanism is connected in the extraction tube (3), a connecting tube (4) is fixedly connected and connected to the middle position of the collection tube (2) close to the side of the detector (1), an air guide component is connected in the connecting tube (4), the end of the connecting tube (4) away from the collection tube (2) is connected to the detector (1), and an exhaust hole (203) is provided through the end of the collection tube (2) away from the extraction tube (3) and connected to the air cavity (201).

2. A petrochemical raw material rapid detection device according to claim 1, characterized in that: The extraction mechanism comprises a piston (5) and a plug rod (6); the piston (5) is slidably connected to the inner wall of the air cavity (201); one end of the plug rod (6) is fixedly connected to the end of the piston (5) away from the air inlet (202); the end of the plug rod (6) away from the piston (5) passes through the end of the collection tube (2) away from the air inlet (202) and is slidably connected to the collection tube (2).

3. A petrochemical raw material rapid detection device according to claim 2, characterized in that: One end of the plug rod (6) away from the piston (5) is fixedly connected to a rod handle (7), and the rod handle (7) abuts against the outer wall of the collection tube (2).

4. A petrochemical raw material rapid detection device according to claim 1, characterized in that: The negative pressure blocking mechanism comprises a blocking ring (8), a blocking ball (9), a negative pressure spring (10) and a fixed rod (11); both ends of the fixed rod (11) are fixedly connected to the inner wall of the air inlet (202); the negative pressure spring (10) is fixedly connected to the middle position of the fixed rod (11) close to the suction tube (3); the other end of the negative pressure spring (10) is fixedly connected to the blocking ball (9); the outer wall of the blocking ring (8) is fixedly connected to the inner wall of the suction tube (3); the end of the blocking ball (9) away from the negative pressure spring (10) abuts against the end of the blocking ring (8) close to the fixed rod (11).

5. The petrochemical raw material rapid detection device according to claim 1, characterized in that: The detector (1) is fixedly connected to and communicated with an externally threaded tube (12) at one end close to the collection tube (2); a thread groove (401) is provided on the inner wall of the connecting tube (4) at one end away from the collection tube (2); the externally threaded tube (12) is threadedly connected to the thread groove (401); and the air guide assembly is located below the externally threaded tube (12).

6. A petrochemical raw material rapid detection device according to claim 5, characterized in that: The gas guide assembly includes a gas guide block (13), the gas guide block (13) is located in the connecting tube (4) and is slidably connected to the inner wall of the connecting tube (4), the end of the gas guide block (13) away from the collection tube (2) is against the external threaded tube (12), a first air hole (101) is opened on the side of the gas guide block (13) away from the collection tube (2), the first air hole (101) is communicated with the external threaded tube (12), a plurality of second air holes (102) are opened through the end of the first air hole (101) close to the collection tube (2), and the plurality of second air holes (102) are opened. The other end of the air hole (102) is arranged at an angle and passes through the side wall of the air guide block (13) near the end of the collection tube (2). The end of the air guide block (13) near the collection tube (2) is matched with the inner wall of the air cavity (201), and the piston (5) is slidably connected to the end of the air guide block (13) near the collection tube (2). The inner wall of the connecting tube (4) near the end of the collection tube (2) is provided with a plurality of reset grooves (402), and the reset components are connected to the plurality of reset grooves (402). The plurality of reset components are connected to the air guide block (13).

7. A petrochemical raw material rapid detection device according to claim 6, characterized in that: The reset assembly comprises a reset spring (14) and a limit block (15), wherein the limit block (15) is slidably connected to the reset groove (402), the limit block (15) is fixedly connected to the outer wall of the air guide block (13) at one end away from the collection tube (2), the side of the limit block (15) close to the collection tube (2) is fixedly connected to the reset spring (14), and the end of the reset spring (14) away from the limit block (15) is fixedly connected to the reset groove (402).

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