Saline water sampling device for chlor-alkali chemical industry

Abstract

The invention belongs to the technical field of chlor-alkali chemical industry, and particularly relates to a saline water sampling device for chlor-alkali chemical industry, the saline water sampling device comprises a base, an annular plate is fixed at the top of the base, a shell is fixed at the top of the annular plate through a mounting frame, and a collecting cylinder is fixed in the annular plate. According to the saline water sampling device for the chlor-alkali chemical industry, the base, the annular plate, the shell, the collecting cylinder, the filtering cylinder, an annular air pipe, an upper semicircular air conveying ring pipe, a lower semicircular air conveying ring pipe, a pneumatic ring, a forward air conveying pipe, a conical block, a round pressing block, a first spring and a transmission mechanism are arranged; when the pump body is started to continuously pump the sampled saline water into the filter cartridge, the filter cartridge can be driven to rotate by forward rotation of the pneumatic ring, so that the saline water can be sampled and centrifugally filtered at the same time, the filtering speed of the sampled saline water can be accelerated, and after the saline water sampling and pumping are completed, the filter cartridge is separated from the filter cartridge. And when the filter cartridge continues to centrifugally rotate, the filtered impurities can be dehydrated.

Description

Technical Field

[0001] The invention relates to the technical field of chlor-alkali chemical industry, in particular to a brine sampling device used in chlor-alkali chemical industry. Background Art

[0002] Chlor-alkali chemical industry refers to the process of producing chlorine, sodium hydroxide and hydrogen by electrolyzing saturated salt water, and using them as raw materials to produce a series of chemical products, which is called chlor-alkali industry. Chlor-alkali industry is one of the most basic chemical industries. Its products are not only used in the chemical industry itself, but also widely used in light industry, textile industry, metallurgical industry and petrochemical industry. In the production process of chlor-alkali chemical industry, for example, after the raw salt is dissolved to form primary brine, it is necessary to sample and test it in order to judge whether the primary brine formed after the raw salt is dissolved meets the standard. When sampling the brine, a sampling device is needed. The primary brine formed will contain impurities, so the sampling device will be provided with a structure for filtering impurities in the primary brine. However, during the use of the current brine sampling device for chlor-alkali chemical industry, it is generally filtered by setting a filter screen at the inlet pipe of the sampling device. As the filtration time of the static filter screen increases, impurities will gradually accumulate on the surface of the filter screen, eventually causing the pore size to become smaller or even completely blocked, which will affect the sampling work. In addition, the impurities subsequently filtered by the filter screen plate cannot be automatically discharged conveniently, which is inconvenient to use. Therefore, we propose a brine sampling device for chlor-alkali chemical industry to solve the above problems. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the present invention provides a brine sampling device for chlor-alkali chemical industry, which solves the problems raised in the above-mentioned background technology.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] A brine sampling device for chlor-alkali chemical industry, comprising a base, a ring plate is fixed on the top of the base, a shell is fixed on the top of the ring plate through a mounting frame, a collecting cylinder is fixed inside the ring plate, a filter cylinder adapted to the collecting cylinder is rotatably connected inside the shell, the collecting cylinder is rotatably connected to the filter cylinder, an annular air pipe is arranged above the shell, two air outlet pipes of the annular air pipe pass through the shell and extend to the inside thereof and are fixed with an upper semicircular air transmission ring pipe, the bottom of the upper semicircular air transmission ring pipe is tightly fitted and rotatably connected with a lower semicircular air transmission ring pipe adapted to the upper semicircular air transmission ring pipe, a pneumatic ring is fixed on the top of the filter cylinder, and a pneumatic ring is connected and fixed with a valve for controlling its rotation direction The forward air supply pipe and the reverse air supply pipe, the top ends of which are connected and fixed to the lower semicircular air supply ring pipe, electric valves are installed on the forward air supply pipe and the reverse air supply pipe, a conical block is arranged inside the filter cartridge, a round pressure block is arranged below the conical block, three springs are fixed between the conical block and the round pressure block, a transmission mechanism which can simultaneously drive the conical block to move up and down when the filter cartridge rotates is arranged inside the shell, a toggle ring is fixed on the surface of the filter cartridge, a sealing assembly fixed at the impurity discharge port of the collecting cartridge is arranged below the toggle ring, a liquid inlet pipe is fixed inside the two through holes opened in the top of the shell, and a liquid discharge pipe is connected and fixed to the bottom of the collecting cartridge.

[0008] Furthermore, the transmission mechanism includes a support plate fixed to the top inner wall of the shell, the side wall of the support plate is rotatably connected to a rotating shaft through a bearing, a rotating plate is fixed to one end of the rotating shaft, and a side wall of the rotating plate is rotatably connected to a reciprocating rod through a pin shaft, the bottom end of the reciprocating rod is fixedly connected to the top of the conical block, the top of the reciprocating rod slides through the shell and extends above it, a support frame is fixed inside the filter cartridge, a bevel gear ring is fixed on the top of the support frame, a bevel gear is fixed to the surface of the rotating shaft, and the bevel gear is meshingly connected to the bevel gear ring.

[0009] Furthermore, a knocking plate is fixed to the top end of the reciprocating rod, and two knocking blocks are fixed to the bottom end of the knocking plate.

[0010] Furthermore, the blocking assembly includes a guide frame fixed at the impurity discharge port of the collecting barrel, two blocking plates are slidably connected inside the guide frame, two spring twos are fixed inside the guide frame, the other ends of the spring twos are respectively fixedly connected to the corresponding blocking plates, the two arc-shaped openings opened on the top of the annular plate are both slidably connected to moving blocks, the bottoms of the moving blocks are rotatably connected to connecting rods through pins, the other ends of the connecting rods are respectively rotatably connected to the corresponding blocking plates through pins, telescopic blocks are slidably provided inside the moving blocks, spring three is fixed inside the moving blocks, and the tops of the spring three are respectively fixedly connected to the corresponding telescopic blocks.

[0011] Furthermore, L-shaped sealing gaskets are fixed on the surfaces of the two blocking plates, and the L-shaped sealing gaskets are made of rubber.

[0012] Furthermore, an annular rail is fixed inside the shell, and a rotating ring matched with the annular rail is fixed on the surface of the filter cartridge.

[0013] Furthermore, two exhaust pipes are connected and fixed to the top of the shell, and dustproof nets are fixed inside the exhaust pipes.

[0014] Furthermore, a telescopic protective cover is fixed to the bottom of the conical block, and the bottom of the telescopic protective cover is fixedly connected to the top of the circular pressing block.

[0015] Furthermore, the electric valves installed on the forward gas pipeline and the reverse gas pipeline are both wirelessly controlled.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a brine sampling device for chlor-alkali chemical industry, which has the following beneficial effects:

[0018] The present invention, by arranging a base, an annular plate, a shell, a collecting cylinder, a filter cylinder, an annular air pipe, an upper semicircular air transmission ring pipe, a lower semicircular air transmission ring pipe, a pneumatic ring, a forward-rotating air transmission pipe, a conical block, a round pressure block, a spring and a transmission mechanism, during the use of the brine sampling device for chlor-alkali chemical industry, when the pump body is started to continuously pump the sampled brine into the interior of the filter cylinder, the pneumatic ring is used to rotate forward to drive the filter cylinder to rotate, thereby realizing the centrifugal filtration of the brine while sampling, and at this time, the filtration speed of the sampled brine can be accelerated, and after the brine sampling is completed, the filter cylinder continues to rotate centrifugally to realize the dehydration operation of the filtered impurities, and through the cooperation of the transmission mechanism, the filter cylinder can drive the round pressure block to assist in extruding and dehydrating the impurities when the filter cylinder rotates centrifugally, thereby realizing a more thorough dehydration of the impurities inside the filter cylinder.

[0019] The present invention provides a reverse air supply pipe, a toggle ring and a plugging assembly. When the filter cartridge rotates forward to filter salt water and dehydrate impurities, the toggle ring driven by the filter cartridge to rotate will not automatically open the plugging assembly. However, when the impurities inside the filter cartridge are completely dehydrated, the reverse air supply pipe can be used to change the direction in which the pneumatic ring drives the filter cartridge to rotate. Then, the plugging assembly can be automatically opened under the push of the toggle ring, and then the impurities inside the filter cartridge that have been filtered and dehydrated can be automatically discharged. The invention is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention from a first viewing angle;

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0022] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the filter cartridge structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the pneumatic ring structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the support plate structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the guide frame structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the sealing plate structure of the present invention.

[0028] In the figure: 1, base; 2, annular plate; 3, shell; 4, collecting tube; 5, filter tube; 6, annular air pipe; 7, upper semicircular air pipe; 8, lower semicircular air pipe; 9, pneumatic ring; 10, forward air pipe; 11, reverse air pipe; 12, electric valve; 13, cone block; 14, round pressure block; 15, spring 1; 16, transmission mechanism; 1601, support plate; 1602, rotating shaft; 1603, rotating plate; 1604, reciprocating rod; 1605, support frame; 1606, cone Gear ring; 1607, bevel gear; 1608, knocking plate; 1609, knocking block; 17, toggle ring; 18, sealing assembly; 1801, guide frame; 1802, sealing plate; 1803, spring 2; 1804, moving block; 1805, connecting rod; 1806, telescopic block; 1807, spring 3; 1808, L-shaped sealing gasket; 19, liquid inlet pipe; 20, liquid discharge pipe; 21, annular rail; 22, rotating ring; 23, exhaust pipe; 24, dust net; 25, telescopic protective cover. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a brine sampling device for chlor-alkali chemical industry proposed by one embodiment of the present invention comprises a base 1, an annular plate 2 is fixed on the top of the base 1, a shell 3 is fixed on the top of the annular plate 2 through a mounting frame, a collecting cylinder 4 is fixed inside the annular plate 2, a filter cylinder 5 adapted to the collecting cylinder 4 is rotatably connected inside the shell 3, the collecting cylinder 4 and the filter cylinder 5 are rotatably connected in engagement, an annular rail 21 is fixed inside the shell 3, a rotating ring 22 adapted to the annular rail 21 is fixed on the surface of the filter cylinder 5, which can play an auxiliary supporting role for the filter cylinder 5, so that it will be more stable during the rotation process, an annular air pipe 6 is arranged above the shell 3, two air outlet pipes of the annular air pipe 6 penetrate the shell 3 and extend to the inside thereof and are fixed with an upper semicircular air transmission ring pipe 7, the bottom of the upper semicircular air delivery ring tube 7 is tightly fitted and rotatably connected with the lower semicircular air delivery ring tube 8 adapted thereto, a pneumatic ring 9 is fixed on the top of the filter cartridge 5, and a forward air delivery pipe 10 and a reverse air delivery pipe 11 for controlling the rotation direction thereof are connected and fixed on the pneumatic ring 9, the top ends of the forward air delivery pipe 10 and the reverse air delivery pipe 11 are both connected and fixed with the lower semicircular air delivery ring tube 8, and electric valves 12 are installed on the forward air delivery pipe 10 and the reverse air delivery pipe 11, a conical block 13 is arranged inside the filter cartridge 5, a round pressure block 14 is arranged below the conical block 13, three springs 15 are fixed between the conical block 13 and the round pressure block 14, a telescopic protective cover 25 is fixed on the bottom of the conical block 13, and the bottom of the telescopic protective cover 25 is fixedly connected to the top of the round pressure block 14, and a The telescopic protective cover 25 can protect the spring 15, thereby extending its service life. The interior of the shell 3 is provided with a transmission mechanism 16 which can simultaneously drive the cone block 13 to move up and down when the filter cartridge 5 rotates. A toggle ring 17 is fixed on the surface of the filter cartridge 5, and a sealing component 18 fixed to the impurity discharge port of the collection cartridge 4 is provided below the toggle ring 17. A liquid inlet pipe 19 is fixed inside the two through holes opened at the top of the shell 3, and a liquid discharge pipe 20 is connected and fixed to the bottom of the collection cartridge 4. During the use of this brine sampling device for chlor-alkali chemical industry, a pump body for extracting brine is installed on the top of the shell 3, and the liquid outlet pipe of the pump body is connected and fixed to the liquid inlet pipe 19, but the pump body is not shown in the figure, and when the sampling device is working, it is necessary The air delivery end pipeline of the air pump is connected and fixed with the annular air pipe 6 so as to drive the pneumatic ring 9 to rotate. When the brine is extracted and sampled, the sampled brine extracted by the pump body will fall into the interior of the filter cartridge 5 through the liquid inlet pipe 19. At this time, since the electric valve 12 on the forward air delivery pipe 10 is open, and the electric valve 12 on the reverse air delivery pipe 11 is closed, the pneumatic ring 9 can be driven to rotate forward under the action of the air pump output gas. Since the blocking component 18 can self-adjust and give way to the forward rotating toggle ring 17, and then allow it to rotate through without interference, when the pneumatic ring 9 rotates through the filter cartridge 5 and drives the toggle ring 17 to rotate forward, the blocking component 18 will not be driven to open. After the pneumatic ring 9 rotates, it will drive the filter cartridge 5 to rotate forward.At this time, the incoming salt water can be centrifugally filtered, and the filtered salt water will be thrown off and collected in the collecting cylinder 4. Finally, the filtered sampled salt water can be discharged into the sampling barrel through the drain pipe 20. When the salt water extraction and sampling is completed, the filter cylinder 5 can continue to rotate to dehydrate the impurities inside it, and the impurities after centrifugal dehydration will slide to the center of the filter cylinder 5. Since the filter cylinder 5 rotates, the transmission mechanism 16 can be started to drive the cone block 13 to move up and down. After the cone block 13 moves down, it can drive the round pressure block 14 to repeatedly squeeze the impurities deposited at the center of the filter cylinder 5, so as to dehydrate the impurities more thoroughly. By using the set spring 15, when there are more impurities deposited at the center of the filter cylinder 5, the round pressure block 14 can be self-contracted to a certain extent under the auxiliary action of the spring 15, so as to avoid overloading of the transmission mechanism 16 caused by excessive squeezing of impurities. When the impurities are squeezed and dehydrated, the forward air supply pipe can be closed. 10, and then the electric valve 12 on the reverse air pipe 11 can be opened, and then the pneumatic ring 9 can be reversed under the drive of the gas. At this time, when the pneumatic ring 9 rotates through the filter cartridge 5 to drive the toggle ring 17 to rotate, it will be blocked by the blocking component 18, and then when the toggle ring 17 reverses and pushes the blocking component 18, the impurity discharge port at the bottom of the collection cylinder 4 can be automatically opened, and then the impurities filtered during the brine sampling can be automatically discharged. Through the cooperation of the upper semicircular air pipe 7 and the lower semicircular air pipe 8, when the pneumatic ring 9 is in the forward and reverse process, it will not affect the normal delivery of gas through the annular air pipe 6 to the inside and then drive it to rotate. For the set pneumatic ring 9, there are two cavities inside it, the forward air pipe 10 is connected to the cavity above it, and the reverse air pipe 11 is connected to the cavity below it, and the arc-shaped air outlet pipes arranged on the upper and lower surfaces are arranged in different directions, so that the pneumatic ring 9 can be driven to rotate forward and reverse.

[0032] like Figure 3 , Figure 4 and Figure 6As shown, in some embodiments, the transmission mechanism 16 includes a support plate 1601 fixed to the top inner wall of the shell 3, the side wall of the support plate 1601 is rotatably connected to the rotating shaft 1602 through a bearing, one end of the rotating shaft 1602 is fixed with a rotating plate 1603, and one side wall of the rotating plate 1603 is rotatably connected to a reciprocating rod 1604 through a pin shaft, a knocking plate 1608 is fixed to the top of the reciprocating rod 1604, and two knocking blocks 1609 are fixed to the bottom of the knocking plate 1608. With the cooperation of the knocking plate 1608 and the knocking blocks 1609, when the reciprocating rod 1604 moves up and down, the shell 3 can be reciprocated and knocked to cause it to vibrate, which can help accelerate the falling of salt water and filter impurities to the center of the filter cartridge 5. The bottom end of the reciprocating rod 1604 is fixedly connected to the top of the conical block 13. The top end of the reciprocating rod 1604 slides through the shell 3 and extends above it. A support frame 1605 is fixed inside the filter cartridge 5. A bevel gear ring 1606 is fixed on the top of the support frame 1605. A bevel gear 1607 is fixed on the surface of the rotating shaft 1602. The bevel gear 1607 is meshingly connected with the bevel gear ring 1606. When in use, when the filter cartridge 5 rotates, the bevel gear ring 1606 can be driven to rotate through the support frame 1605. After the bevel gear ring 1606 rotates, the bevel gear 1607 can be driven to rotate. After the bevel gear 1607 rotates, the rotating shaft 1602 can be driven to rotate. After the rotating shaft 1602 rotates, the rotating plate 1603 is driven to rotate. Finally, when the rotating plate 1603 rotates, the reciprocating rod 1604 can be driven to move up and down. Therefore, when the filter cartridge 5 rotates, the round pressing block 14 can be driven to move back and forth up and down to squeeze and dehydrate impurities.

[0033] like Figure 2 , Figure 7 and Figure 8As shown, in some embodiments, the plugging assembly 18 includes a guide frame 1801 fixed at the impurity discharge port of the collection tube 4, and the guide frame 1801 is internally slidably connected to two plugging plates 1802, and the surfaces of the two plugging plates 1802 are fixed with L-shaped sealing gaskets 1808, which are made of rubber, and can enhance the sealing performance of the two plugging plates 1802 after being fitted together, and at the same time can enhance the sealing performance of the plugging plates 1802 and the bottom of the collection tube 4 after being fitted together, so as to avoid salt during sampling and filtration. Water may leak. Two springs 1803 are fixed inside the guide frame 1801. The other ends of the springs 1803 are fixedly connected to the corresponding blocking plates 1802. The two arc-shaped openings on the top of the annular plate 2 are slidably connected to the moving blocks 1804. The bottoms of the moving blocks 1804 are rotatably connected to the connecting rods 1805 through the pins. The other ends of the connecting rods 1805 are rotatably connected to the corresponding blocking plates 1802 through the pins. The insides of the moving blocks 1804 are slidably connected to the telescopic blocks 1804. 806, a spring 3 1807 is fixed inside the moving block 1804, and the top of the spring 3 1807 is fixedly connected to the corresponding telescopic block 1806. When in use, the telescopic block 1806 and the spring 3 1807 cooperate with each other, so that when the toggle ring 17 rotates forward and contacts the telescopic block 1806, the telescopic block 1806 is provided with a bevel, so that the toggle ring 17 can rotate normally. When the toggle ring 17 is reversed, it cannot pass through, and when it cannot pass through, it will push the moving block 1804 slides inside the arc-shaped opening of the annular plate 2. When the two moving blocks 1804 move, with the cooperation of the two connecting rods 1805, the two sealing plates 1802 can be driven to move in the opposite direction and then open, and then the impurities can be discharged. Since the sealing plates 1802 will squeeze the spring 2 1803 after moving and opening, when the toggle ring 17 is turned forward after the impurities are discharged, the sealing plates 1802 can be driven to reset under the restoring force of the spring 2 1803 and continue to seal the impurity discharge port of the collecting tube 4.

[0034] like Figure 1 and Figure 3 As shown, in some embodiments, two exhaust pipes 23 are connected and fixed at the top of the shell 3, and dust-proof nets 24 are fixed inside the exhaust pipes 23, which facilitate the discharge of the gas used when the pneumatic ring 9 inside the shell 3 is driven to rotate. The dust-proof net 24 can prevent external dust and flocs from entering the interior of the filter tube 5 through the exhaust pipes 23.

[0035] like Figure 3 and Figure 5 As shown, in some embodiments, the electric valves 12 installed on the forward air supply pipe 10 and the reverse air supply pipe 11 are both wirelessly controlled. After the two electric valves 12 are wirelessly connected and controlled, the pneumatic ring 9 will not be affected by the interference of the wires when it rotates.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A brine sampling device for chlor-alkali chemical industry, comprising a base (1), characterized in that: An annular plate (2) is fixed on the top of the base (1), a shell (3) is fixed on the top of the annular plate (2) via a mounting frame, a collecting cylinder (4) is fixed inside the annular plate (2), a filter cylinder (5) matching the collecting cylinder (4) is rotatably connected inside the shell (3), the collecting cylinder (4) and the filter cylinder (5) are rotatably connected in a snap-fitting manner, an annular air pipe (6) is arranged above the shell (3), two air outlet pipes of the annular air pipe (6) penetrate the shell (3) and extend into the interior thereof and are fixed with an upper semicircular air supply ring pipe (7), the bottom of the upper semicircular air supply ring pipe (7) is tightly fitted and rotatably connected with a lower semicircular air supply ring pipe (8) matching therewith, a pneumatic ring (9) is fixed on the top of the filter cylinder (5), a forward air supply pipe (10) and a reverse air supply pipe (11) for controlling the rotation direction of the pneumatic ring (9) are connected and fixed to the pneumatic ring (9), the forward air supply pipe (10) and the reverse air supply pipe (11) for controlling the rotation direction thereof are connected and fixed to the pneumatic ring (9), the forward air supply pipe (10) and the reverse air supply pipe (11) for controlling the rotation direction of the forward air supply pipe (10) are connected to the reverse air supply pipe (11) and the reverse air supply pipe (1 ... ) and the top of the reverse air supply pipe (11) are both connected and fixed to the lower semicircular air supply ring pipe (8); the forward air supply pipe (10) and the reverse air supply pipe (11) are both installed with electric valves (12); a conical block (13) is arranged inside the filter cylinder (5); a round pressure block (14) is arranged below the conical block (13); three springs (15) are fixed between the conical block (13) and the round pressure block (14); a transmission mechanism (16) is arranged inside the shell (3) for simultaneously driving the conical block (13) to move up and down when the filter cylinder (5) rotates; a toggle ring (17) is fixed on the surface of the filter cylinder (5); a sealing component (18) fixed to the impurity discharge port of the collection cylinder (4) is arranged below the toggle ring (17); a liquid inlet pipe (19) is fixed inside the two through holes opened at the top of the shell (3); and a liquid discharge pipe (20) is connected and fixed at the bottom of the collection cylinder (4).

2. A brine sampling device for chlor-alkali chemical industry according to claim 1, characterized in that: The transmission mechanism (16) comprises a support plate (1601) fixed to the top inner wall of the shell (3); the side wall of the support plate (1601) is rotatably connected to a rotating shaft (1602) via a bearing; a rotating plate (1603) is fixed to one end of the rotating shaft (1602); a side wall of the rotating plate (1603) is rotatably connected to a reciprocating rod (1604) via a pin; the bottom end of the reciprocating rod (1604) is fixedly connected to the top of the conical block (13); the top end of the reciprocating rod (1604) slides through the shell (3) and extends above it; a support frame (1605) is fixed inside the filter cartridge (5); a bevel gear ring (1606) is fixed to the top of the support frame (1605); a bevel gear (1607) is fixed to the surface of the rotating shaft (1602); the bevel gear (1607) is meshingly connected to the bevel gear ring (1606).

3. A brine sampling device for chlor-alkali chemical industry according to claim 2, characterized in that: A knocking plate (1608) is fixed to the top of the reciprocating rod (1604), and two knocking blocks (1609) are fixed to the bottom of the knocking plate (1608).

4. The brine sampling device for chlor-alkali chemical industry according to claim 1, characterized in that: The plugging assembly (18) comprises a guide frame (1801) fixed at the impurity discharge port of the collecting barrel (4), two plugging plates (1802) are slidably connected inside the guide frame (1801), two springs (1803) are fixed inside the guide frame (1801), the other ends of the springs (1803) are respectively fixedly connected to the corresponding plugging plates (1802), and the two arc-shaped openings on the top of the annular plate (2) are slidably connected to the moving blocks (18 04), the bottom of the moving block (1804) is rotatably connected to a connecting rod (1805) via a pin shaft, the other end of the connecting rod (1805) is rotatably connected to the corresponding blocking plate (1802) via a pin shaft, a telescopic block (1806) is slidably provided inside the moving block (1804), a spring three (1807) is fixed inside the moving block (1804), and the top end of the spring three (1807) is fixedly connected to the corresponding telescopic block (1806).

5. A brine sampling device for chlor-alkali chemical industry according to claim 4, characterized in that: L-shaped sealing pads (1808) are fixed on the surfaces of the two sealing plates (1802), and the L-shaped sealing pads (1808) are made of rubber.

6. The brine sampling device for chlor-alkali chemical industry according to claim 1, characterized in that: An annular rail (21) is fixed inside the housing (3), and a rotating ring (22) matching the annular rail (21) is fixed on the surface of the filter cartridge (5).

7. The brine sampling device for chlor-alkali chemical industry according to claim 1, characterized in that: Two exhaust pipes (23) are connected and fixed at the top of the shell (3), and dustproof nets (24) are fixed inside the exhaust pipes (23).

8. The brine sampling device for chlor-alkali chemical industry according to claim 1, characterized in that: A telescopic protective cover (25) is fixed to the bottom of the conical block (13), and the bottom of the telescopic protective cover (25) is fixedly connected to the top of the round pressing block (14).

9. The brine sampling device for chlor-alkali chemical industry according to claim 1, characterized in that: The electric valves (12) installed on the forward gas supply pipe (10) and the reverse gas supply pipe (11) are both wirelessly controlled.

Images