Adjustable stratified sampling device of liquid storage tank

Abstract

The utility model belongs to the technical field of vertical storage tanks, and particularly relates to an adjustable stratified sampling device of a liquid storage tank. Through reasonable arrangement of the sampling box and the sampling pipeline and matched use of the adjustable shaft disc and the floating ball system, stratified sampling of different liquid levels in the storage tank can be achieved on the lower portion of the outer side of the storage tank, the stratified sampling device is compact in structure and convenient to use, a worker does not need to climb to the top of the storage tank for operation, the labor intensity of the worker is greatly reduced, and the working efficiency is improved. The sampling efficiency is improved; by arranging the adjustable shaft disc and the floating ball system, the height of the sampling port can be conveniently adjusted, and sampling of samples with different liquid levels can be realized; in the sampling process, except for a sample, stored liquid in the tank is not in contact with the outside, so that the stored liquid can be effectively prevented from being polluted; according to the utility model, the nitrogen purging system is arranged to perform reverse purging on the sampling tube, so that the interference of residual stored liquid on the sampling tube can be effectively avoided, and the variety of the stored liquid can be conveniently switched.

Description

Technical Field

[0001] The utility model belongs to the technical field of vertical storage tanks, and in particular relates to an adjustable stratified sampling device for a liquid storage tank. Background Art

[0002] Vertical storage tanks are mainly related to the field of chemical technology and are one of the common equipment in the chemical field. They are also widely used in various industries such as food and beverage, light industry, and organic chemistry. Layered sampling and inspection of materials in storage tanks is a common means of monitoring the condition of materials in the tanks.

[0003] In practical applications, existing technologies typically use a sampling port on the tank top, either manually lowering a sampler, or using a sampling port opened at the tank bottom for sampling. However, sampling from the tank top is labor-intensive, requiring manual labor at height, and the sampler can easily contaminate the tank top. Furthermore, it is inefficient and cannot be quickly operated and inspected. Sampling ports opened at the tank bottom can only capture samples from the bottom, resulting in low data reliability and low detection accuracy. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an adjustable stratified sampling device for liquid storage tanks, which has a compact structure, is easy to use, can realize stratified sampling of different liquid level heights in vertical storage tanks, can greatly reduce manual labor intensity, and improve sampling efficiency.

[0005] The technical solutions adopted by the present invention to solve the above technical problems are:

[0006] An adjustable stratified sampling device for a liquid storage tank, comprising: a sampling box 100, a buoyancy sampling system 200, and an adjustable shaft disc assembly 300. The sampling box 100 is disposed at the lower portion of the outer wall of a vertical storage tank 400, and the buoyancy sampling system 200 and the adjustable shaft disc assembly 300 are disposed inside the vertical storage tank 400.

[0007] The sampling box 100 includes a box body 1 fixedly mounted on the lower portion of the outer wall of the vertical storage tank 400, a sampling pipeline 2 is provided in the box body 1, one end of the sampling pipeline 2 is connected to a corresponding sampling valve group, and the other end penetrates into the interior of the vertical storage tank 400, and the sampling pipeline 2 is connected to a corresponding nitrogen purge pipeline 3;

[0008] The buoyancy sampling system 200 includes a plurality of floats and a slide rod 13 longitudinally arranged along the inner wall of the vertical storage tank 400. The bottom of each float is connected to one end of a corresponding slip ring, and the other end of each slip ring is slidably sleeved on the slide rod 13. A corresponding flexible sampling tube is fixed in the middle of each slip ring, and each flexible sampling tube is connected to a corresponding sampling pipeline 2.

[0009] The floats are connected to the adjustable shaft disc assembly 300 via corresponding steel cables 14 .

[0010] Furthermore, the plurality of floats specifically include a high liquid level float 9 and a middle liquid level float 11, the buoyancy of the high liquid level float 9 and the middle liquid level float 11 being adapted to the high liquid level sampling height and the middle liquid level sampling height preset in the tank, respectively;

[0011] Furthermore, the bottoms of the high liquid level float 9 and the middle liquid level float 11 are connected to the triple slip ring 10 and the multi-slip ring 12 respectively, and the high liquid level flexible sampling tube 81 and the middle liquid level flexible sampling tube 82 are fixed in the middle of the triple slip ring 10 and the multi-slip ring 12 respectively.

[0012] Furthermore, the sampling pipeline 2 specifically includes a high liquid level sampling tube 21, a middle liquid level sampling tube 22 and a low liquid level sampling tube 23, and one end of the high liquid level sampling tube 21, the middle liquid level sampling tube 22 and the low liquid level sampling tube 23 located in the box body 1 is respectively installed with a high liquid level sampling valve 61, a middle liquid level sampling valve 62 and a low liquid level sampling valve 63;

[0013] One end of the high liquid level sampling tube 21 and the middle liquid level sampling tube 22 that penetrate into the interior of the vertical storage tank 400 is connected to the high liquid level flexible sampling tube 81 and the middle liquid level flexible sampling tube 82 respectively, and the height of the low liquid level sampling tube 23 that penetrates into the interior of the vertical storage tank 400 is adapted to the preset low liquid level sampling height in the tank.

[0014] Furthermore, the box body 1 is made of 304 stainless steel, and a rainproof eave is provided on the top of the box body 1, and a detachable sewage trough 7 is provided on the bottom. A corresponding tubular one-way valve group 4 is installed on the nitrogen purge pipeline 3.

[0015] Furthermore, the parts of the high liquid level sampling tube 21 , the middle liquid level sampling tube 22 and the low liquid level sampling tube 23 located in the box body 1 are all installed with corresponding pressure gauges 5 .

[0016] Furthermore, the adjustable shaft disc assembly 300 specifically includes a main shaft disc 15 and an auxiliary shaft disc 16 , and the steel wires 14 wound around the main shaft disc 15 and the auxiliary shaft disc 16 are connected to the high liquid level float 9 and the middle liquid level float 11 respectively.

[0017] Furthermore, the auxiliary shaft disc 16 is fixedly mounted on the connecting shaft 17 , and an adjusting pin 18 is provided at the end of the connecting shaft 17 .

[0018] Furthermore, the spindle disk 15 is rotatably sleeved on the connecting shaft 17 , and an adjusting disk 19 is fixedly connected to the end surface of the spindle disk 15 .

[0019] Furthermore, the radius of the auxiliary shaft disk 16 is half of the radius of the main shaft disk 15 .

[0020] Compared with the prior art, the present invention has the following main advantages:

[0021] 1. The utility model realizes stratified sampling of different liquid levels in the storage tank at the lower part of the outer side of the storage tank through the reasonable arrangement of the sampling box and sampling pipeline, and the coordinated use of the adjustable shaft disc and the float system. It has a compact structure and is easy to use. It does not require manual operation on the tank top, which greatly reduces the labor intensity and improves the sampling efficiency.

[0022] 2. The utility model is equipped with an adjustable shaft disc and a float system, which can conveniently adjust the height of the sampling port to achieve sampling of samples at different liquid levels;

[0023] 3. During the sampling process, the liquid in the tank has no contact with the outside world except for the sample, which can effectively avoid liquid contamination.

[0024] 4. The present invention sets a nitrogen purge system to purge the sampling tube in reverse, which can effectively avoid the interference of residual storage liquid on the sampling tube and facilitate the switching of storage liquid types. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an overall schematic diagram of the sampling device in an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the front view of the sampling box in the embodiment of the present utility model;

[0027] Figure 3 This is a side view of a sampling box in an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of the buoyancy sampling system and the adjustable shaft disc assembly in an embodiment of the present invention.

[0029] In the figure: 100-sampling box, 200-buoyancy sampling system, 300-adjustable shaft disc assembly, 400-vertical storage tank, 1-tank, 21-high liquid level sampling tube, 22-medium liquid level sampling tube, 23-low liquid level sampling tube, 3-nitrogen purge pipeline, 4-tubular one-way valve assembly, 5-pressure gauge, 61-high liquid level sampling valve, 62-medium liquid level sampling valve, 63-low liquid level sampling valve, 7-detachable sewage trough, 81-high liquid level flexible sampling tube, 82-medium liquid level flexible sampling tube, 9-high liquid level float, 10-triple slip ring, 11-medium liquid level float, 12-multi-slip ring, 13-slide rod, 14-wire rope, 15-main shaft disc, 16-auxiliary shaft disc, 17-connecting shaft, 18-adjusting pin, 19-adjusting disc. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of this application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as a limitation on this application.

[0034] The features and performance of the present application are further described in detail below with reference to the embodiments.

[0035] Example 1: This example provides an adjustable stratified sampling device for a liquid storage tank, such as Figures 1 to 4 As shown, it includes: a sampling box 100, a buoyancy sampling system 200 and an adjustable shaft disc assembly 300, the sampling box 100 is arranged at the lower part of the outer wall of the vertical storage tank 400, and the buoyancy sampling system 200 and the adjustable shaft disc assembly 300 are arranged inside the vertical storage tank 400;

[0036] The sampling box 100 includes a box body 1 fixedly mounted on the lower portion of the outer wall of the vertical storage tank 400, a sampling pipeline 2 is provided in the box body 1, one end of the sampling pipeline 2 is connected to a corresponding sampling valve group, and the other end penetrates into the interior of the vertical storage tank 400, and the sampling pipeline 2 is connected to a corresponding nitrogen purge pipeline 3;

[0037] The buoyancy sampling system 200 includes a plurality of floats and a slide rod 13 longitudinally arranged along the inner wall of the vertical storage tank 400. The bottom of each float is connected to one end of a corresponding slip ring, and the other end of each slip ring is slidably sleeved on the slide rod 13. A corresponding flexible sampling tube is fixed in the middle of each slip ring, and each flexible sampling tube is connected to a corresponding sampling pipeline 2.

[0038] The floats are connected to the adjustable shaft disc assembly 300 via corresponding steel cables 14 .

[0039] Furthermore, the plurality of floats specifically include a high liquid level float 9 and a middle liquid level float 11, and the buoyancy of the high liquid level float 9 and the middle liquid level float 11 are respectively adapted to the high liquid level sampling height and the middle liquid level sampling height preset in the tank.

[0040] Furthermore, the bottoms of the high liquid level float 9 and the middle liquid level float 11 are connected to the triple slip ring 10 and the multi-slip ring 12 respectively, and the high liquid level flexible sampling tube 81 and the middle liquid level flexible sampling tube 82 are fixed in the middle of the triple slip ring 10 and the multi-slip ring 12 respectively.

[0041] Furthermore, the sampling pipeline 2 specifically includes a high liquid level sampling tube 21, a middle liquid level sampling tube 22 and a low liquid level sampling tube 23, and one end of the high liquid level sampling tube 21, the middle liquid level sampling tube 22 and the low liquid level sampling tube 23 located in the box body 1 is respectively installed with a high liquid level sampling valve 61, a middle liquid level sampling valve 62 and a low liquid level sampling valve 63;

[0042] One end of the high liquid level sampling tube 21 and the middle liquid level sampling tube 22 that penetrate into the interior of the vertical storage tank 400 is connected to the high liquid level flexible sampling tube 81 and the middle liquid level flexible sampling tube 82 respectively, and the height of the low liquid level sampling tube 23 that penetrates into the interior of the vertical storage tank 400 is adapted to the preset low liquid level sampling height in the tank.

[0043] Furthermore, the box body 1 is made of 304 stainless steel, and a rainproof eave is provided on the top of the box body 1, and a detachable sewage trough 7 is provided on the bottom. A corresponding tubular one-way valve group 4 is installed on the nitrogen purge pipeline 3.

[0044] Furthermore, the parts of the high liquid level sampling tube 21 , the middle liquid level sampling tube 22 and the low liquid level sampling tube 23 located in the box body 1 are all installed with corresponding pressure gauges 5 .

[0045] Furthermore, the adjustable shaft disc assembly 300 specifically includes a main shaft disc 15 and an auxiliary shaft disc 16 , and the steel wires 14 wound around the main shaft disc 15 and the auxiliary shaft disc 16 are connected to the high liquid level float 9 and the middle liquid level float 11 respectively.

[0046] Furthermore, the auxiliary shaft disc 16 is fixedly mounted on the connecting shaft 17 , and an adjusting pin 18 is provided at the end of the connecting shaft 17 .

[0047] Furthermore, the spindle disk 15 is rotatably sleeved on the connecting shaft 17 , and an adjusting disk 19 is fixedly connected to the end surface of the spindle disk 15 .

[0048] Furthermore, the radius of the auxiliary shaft disk 16 is half of the radius of the main shaft disk 15 .

[0049] Furthermore, the box body 1 is made of 304 or higher grade stainless steel and is welded and fixed to the tank wall. The center height of the box body is about 1.3 meters from the tank bottom. The size of the box body can be expanded according to the number of internal valve groups and pipelines.

[0050] Furthermore, the buoyancy of the high liquid level float 9 is slightly greater than the total weight of the corresponding steel wire rope 14 and the high liquid level flexible sampling tube 81; the buoyancy of the middle liquid level float 11 is smaller, which just satisfies the requirement of being positioned in the middle of the liquid surface.

[0051] Its force relationship satisfies the following formula:

[0052] F 高浮 +F 中浮 ≥G1+G2+f 拉

[0053] in:

[0054] F 高浮 : The buoyancy of the high liquid level float 9 below the liquid surface;

[0055] F 中浮 : The buoyancy of the middle liquid level float 11 below the liquid surface;

[0056] G1: gravity of the high liquid level flexible sampling tube 81;

[0057] G2: gravity of the flexible sampling tube 82 at the liquid level;

[0058] f 拉 : The downward pulling force of the wire rope 14.

[0059] Furthermore, the radius of the auxiliary shaft disk 16 is 1 / 2 of the radius of the main shaft disk 15, so that its corresponding mid-liquid level sampling height is 1 / 2 of the high-liquid level sampling height. Auxiliary shaft disks of other diameters can also be selected to achieve sampling of various liquid levels such as 2 / 3 and 1 / 6. At the same time, multiple groups of auxiliary shaft disks can also be set for sampling; at the same time, the number of groups of sampling pipelines, slip rings and other accessories needs to be increased synchronously.

[0060] Example 2: This example provides an adjustable stratified sampling device for a liquid storage tank, which includes a sampling box, a buoyancy sampling system, and an adjustable shaft disc.

[0061] The sampling box part, whose box body 1 is made of 304 or higher grade stainless steel, is welded and fixed to the tank wall. The overall size is 400mm*600mm in width and height, and 200mm in depth. The center height of the box body is about 1.3 meters from the bottom of the tank, which is enough to accommodate conventional samplers and facilitate personnel operation; a rainproof eaves is set above the box body, and a lockable swing door is set to facilitate outdoor rain protection.

[0062] The housing 1 is equipped with three sampling lines, which communicate with the tank interior and correspond to low, medium, and high liquid levels. These sampling lines are connected to a nitrogen purge line 3, which receives exogenous nitrogen. Depending on the tank height, the nitrogen pressure is generally no less than 0.4 MPa. The nitrogen purge line 3 is equipped with a double-pipe check valve assembly 4 to control nitrogen purge and prevent backflow of the stored liquid.

[0063] The sampling line is equipped with a pressure gauge 5 to monitor the pressure inside the line and calculate whether the sampling position is correct. The end of the line is equipped with high, medium and low liquid level sampling valves to meet the needs of stratified sampling.

[0064] The lower part of the box body 1 is provided with a detachable sewage receiving trough 7 for receiving overflowed storage liquid to prevent contamination.

[0065] Furthermore, the buoyancy sampling system and the adjustable shaft disc assembly are all installed in the storage tank. Appropriate materials are selected according to the properties of the stored liquid. Except for the float, the others are made of 304 stainless steel. For corrosive storage liquids, 316L or higher grade materials can be used.

[0066] The specific usage process is as follows:

[0067] When installing the storage tank, adjust the length of the wire ropes on the main and auxiliary shaft discs to adjust the corresponding sampling liquid level heights of the high and medium liquid level sampling pipelines. When sampling, open the sampling box, confirm that the high, medium, and low liquid level sampling valves are all closed, and open the double-pipe one-way valve group to allow clean nitrogen to pass through the nitrogen purge pipeline to purge the sampling pipeline, preventing the long-term storage liquid in the sampling pipeline from affecting the sample data. After the purge is completed, place the sampling container under the corresponding sampling valve and open the corresponding sampling valve. Depending on the detection requirements, individual sampling or mixed sampling can be performed under the corresponding high, medium, and low liquid level sampling valves.

[0068] After obtaining sufficient samples, close the corresponding sampling valve, remove the sampling container, and open the double-pipe check valve group again to allow clean nitrogen to pass through the nitrogen purge line to purge the sampling line, reducing residual contamination of the stored liquid for the next sampling. Finally, close the sampling box body, and the sampling is complete.

[0069] Furthermore, all parts of this application that are not described in detail are the same as the existing technology or are implemented using the existing technology.

[0070] In summary:

[0071] 1. The utility model realizes stratified sampling of different liquid levels in the storage tank at the lower part of the outer side of the storage tank through the reasonable arrangement of the sampling box and sampling pipeline, and the coordinated use of the adjustable shaft disc and the float system. It has a compact structure and is easy to use. It does not require manual operation on the tank top, which greatly reduces the labor intensity and improves the sampling efficiency.

[0072] 2. The utility model is equipped with an adjustable shaft disc and a float system, which can conveniently adjust the height of the sampling port to achieve sampling of samples at different liquid levels;

[0073] 3. During the sampling process, the liquid in the tank has no contact with the outside world except for the sample, which can effectively avoid liquid contamination.

[0074] 4. The present invention sets a nitrogen purge system to purge the sampling tube in reverse, which can effectively avoid the interference of residual storage liquid on the sampling tube and facilitate the switching of storage liquid types.

[0075] The above embodiments are intended only to illustrate the design concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The scope of protection of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications based on the principles and design concepts disclosed in the present invention are within the scope of protection of the present invention.

Claims

1. An adjustable stratified sampling device for a liquid storage tank, characterized by: The invention comprises a sampling box (100), a buoyancy sampling system (200) and an adjustable shaft disc assembly (300), wherein the sampling box (100) is arranged at the lower part of the outer wall of a vertical storage tank (400), and the buoyancy sampling system (200) and the adjustable shaft disc assembly (300) are arranged inside the vertical storage tank (400); The sampling box (100) comprises a box body (1) fixedly mounted on the lower portion of the outer wall of the vertical storage tank (400), a sampling pipeline (2) being provided in the box body (1), one end of the sampling pipeline (2) being connected to a corresponding sampling valve group, and the other end of the sampling pipeline (2) being passed into the interior of the vertical storage tank (400), and the sampling pipeline (2) being connected to a corresponding nitrogen purge pipeline (3); The buoyancy sampling system (200) comprises a plurality of floats and a slide bar (13) longitudinally arranged along the inner wall of the vertical storage tank (400), the bottom of each float being connected to one end of a corresponding slip ring, the other end of each slip ring being slidably sleeved on the slide bar (13), and a corresponding flexible sampling tube being fixed in the middle of each slip ring, and the flexible sampling tube being respectively connected to a corresponding sampling pipeline (2); The floating balls are connected to the adjustable shaft disc assembly (300) via corresponding steel cables (14).

2. The adjustable stratified sampling device for a liquid storage tank according to claim 1, characterized in that: The plurality of floats specifically include a high liquid level float (9) and a middle liquid level float (11), the buoyancy of the high liquid level float (9) and the middle liquid level float (11) being respectively adapted to a high liquid level sampling height and a middle liquid level sampling height preset in the tank.

3. The adjustable stratified sampling device for a liquid storage tank according to claim 2, characterized in that: The bottoms of the high liquid level float (9) and the middle liquid level float (11) are respectively connected to the triple slip ring (10) and the multi-slip ring (12); the middle of the triple slip ring (10) and the multi-slip ring (12) are respectively fixed with a high liquid level flexible sampling tube (81) and a middle liquid level flexible sampling tube (82).

4. The adjustable stratified sampling device for a liquid storage tank according to claim 3, characterized in that: The sampling pipeline (2) specifically comprises a high liquid level sampling tube (21), a middle liquid level sampling tube (22) and a low liquid level sampling tube (23), and one end of each of the high liquid level sampling tube (21), the middle liquid level sampling tube (22) and the low liquid level sampling tube (23) located in the box (1) is respectively installed with a high liquid level sampling valve (61), a middle liquid level sampling valve (62) and a low liquid level sampling valve (63); One end of the high liquid level sampling tube (21) and the middle liquid level sampling tube (22) that penetrate into the interior of the vertical storage tank (400) is connected to the high liquid level flexible sampling tube (81) and the middle liquid level flexible sampling tube (82), respectively. The height at which the low liquid level sampling tube (23) penetrates into the interior of the vertical storage tank (400) is adapted to a preset low liquid level sampling height in the tank.

5. The adjustable stratified sampling device for a liquid storage tank according to claim 1, characterized in that: The box body (1) is made of 304 stainless steel, and a rainproof eave is provided on the top of the box body (1), and a detachable sewage trough (7) is provided on the bottom. A corresponding tubular one-way valve group (4) is installed on the nitrogen purge pipeline (3).

6. The adjustable stratified sampling device for a liquid storage tank according to claim 4, characterized in that: The parts of the high liquid level sampling tube (21), the middle liquid level sampling tube (22) and the low liquid level sampling tube (23) located inside the box (1) are all installed with corresponding pressure gauges (5).

7. The adjustable stratified sampling device for a liquid storage tank according to claim 3, characterized in that: The adjustable shaft disc assembly (300) specifically comprises a main shaft disc (15) and an auxiliary shaft disc (16), wherein the steel wire ropes (14) wound around the main shaft disc (15) and the auxiliary shaft disc (16) are respectively connected to the high liquid level float (9) and the middle liquid level float (11).

8. The adjustable stratified sampling device for a liquid storage tank according to claim 7, characterized in that: The auxiliary shaft disc (16) is fixedly mounted on the connecting shaft (17), and an adjusting pin (18) is provided at the end of the connecting shaft (17).

9. The adjustable stratified sampling device for a liquid storage tank according to claim 8, characterized in that: The main shaft disk (15) is rotatably sleeved on the connecting shaft (17), and an adjusting disk (19) is fixedly connected to the end surface of the main shaft disk (15).

10. The adjustable stratified sampling device for a liquid storage tank according to claim 7, characterized in that: The radius of the auxiliary shaft disk (16) is half of the radius of the main shaft disk (15).

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