A sampling device

Abstract

The utility model relates to chemical equipment sampling technical field, specifically disclose a sampling device, including container body, the container body includes upper cover and casing, the upper cover is detachably connected in the upper end of casing through the hoop structure, the top of upper cover is equipped with first port, second port and third port, the first port sealedly connects has the vent valve, the second port sealedly connects has the vacuum valve, the third port sealedly connects has the pressure gauge, the bottom fixed connection of casing has the three -way pipe, forms fourth port and fifth port through three -way pipe, the fourth port sealedly connects has the feed valve, the fifth port sealedly connects has the material taking valve, the side portion of casing is embedded with the window, adopt the utility model, have the advantages that compact structure, convenient operation, sampling precision is high, security is strong and is convenient for the maintenance.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment sampling technology, specifically to a sampling device for fluid materials in a reaction vessel. Background Technology

[0002] In chemical, pharmaceutical, and fine chemical production processes, parameters such as the component content and reaction conversion rate of materials within the reactor directly determine the reaction endpoint and the final product quality. Therefore, periodic sampling and testing of materials are necessary. Currently, a type of sampler exists in the industry. Its basic structure is as follows: a vacuum pump is connected to the top of the container, the side of the container is connected to the reactor via a feed valve and feed pipe, and a sampling valve is connected to the bottom of the container. Material sampling is achieved by creating a pressure difference through vacuum pumping.

[0003] However, this type of sampler still suffers from several unavoidable technical defects in practical applications: First, residual air affects detection accuracy. Because the feed pipe is connected to the side of the container, when the vacuum pump draws a vacuum from the top, air dead zones easily form in the areas near the bottom and side feed pipe interfaces inside the container, making it impossible to completely evacuate. After the material enters the container, the residual air will react with easily oxidized or volatile materials or cause the material components to volatilize, resulting in distorted detection data. Second, the amount of residual material is large and difficult to clean. The connection structure between the feed valve and the feed pipe has bends and dead angles. After sampling, the material remaining in the pipeline and valve is difficult to remove through conventional rinsing, which not only leads to the loss of valuable materials, but also causes cross-contamination with subsequent samples, affecting the reliability of the detection results. Third, there is a lack of safety monitoring mechanisms. Existing samplers do not integrate pressure detection devices, and it is impossible to monitor the pressure changes inside the container in real time during sampling. When the pressure inside the reactor rises suddenly or the vacuum pump draws a vacuum excessively, it can easily cause material splashing or the container pressure to exceed the limit, posing a serious safety hazard. Fourth, maintenance is inconvenient. Most existing containers are one-piece molded structures, making it difficult to quickly disassemble and repair them when blockages or component damage occur inside. Furthermore, they lack a visual structure, making it impossible to intuitively judge the material filling status, and the detection is easily affected by insufficient or excessive sampling. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing sampling equipment, such as "air residue affecting accuracy, material residue being difficult to clean, lack of pressure monitoring, and poor maintenance visualization", and to provide a sampling device that is compact in structure, easy to operate, has high sampling accuracy, strong safety, and is easy to maintain.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A sampling device includes a container body comprising a top cover and a shell. The top cover is detachably connected to the upper end of the shell via a clamping structure. The top of the top cover has a first port, a second port, and a third port. The first port is sealed to a vent valve, the second port is sealed to a vacuum valve, and the third port is sealed to a pressure gauge. The bottom of the shell is fixedly connected to a tee pipe, through which a fourth port and a fifth port are formed. The fourth port is sealed to a feed valve, and the fifth port is sealed to a sampling valve. A viewing window is embedded in the side of the shell.

[0006] Furthermore, the container body is a cylindrical, sealed structure made of 304 stainless steel.

[0007] Furthermore, the inner wall of the container body is coated with a polytetrafluoroethylene anti-corrosion coating.

[0008] Furthermore, the tee pipe is sealed and welded to the bottom of the housing.

[0009] Furthermore, a sealing element, which is a fluororubber O-ring, is provided between the mating surfaces of the upper cover and the housing.

[0010] Furthermore, there are two windows, which are respectively arranged on opposite sides of the housing; the windows are made of borosilicate glass, and the edges of the windows are sealed to the housing with epoxy resin.

[0011] Furthermore, the vent valve, the vacuum valve, the feed valve, and the take-up valve are all manual ball valves.

[0012] Furthermore, the first port, second port, third port, fourth port and fifth port are all provided with external threads, and the thread specifications are adapted to the connection end threads of the corresponding valves and pressure gauges.

[0013] Compared with the prior art, the sampling device of this utility model has the following advantages: (1) Achieve sealed sampling and ensure detection accuracy: Through the synergistic effect of vacuum pump and vacuum valve, the container body can be evacuated to a vacuum state of -0.08~-0.09MPa before sampling. After the feed valve is opened, the material quickly fills the container under the pressure difference drive. There is no air intervention throughout the process, which effectively avoids problems such as material oxidation and volatilization, and ensures the consistency between the detection data and the actual material state in the vessel.

[0014] (2) Simplify the cleaning process and reduce material loss: After sampling, the pressure is balanced by the vent valve and the material can be completely discharged from the material valve; during cleaning, the cleaning fluid is introduced through the vent valve and the material valve is used to achieve circulating rinsing inside the container; at the same time, the detachable structure of the top cover makes it easier to thoroughly clean the stubborn residues attached to the container.

[0015] (3) Real-time pressure monitoring improves operational safety: The pressure gauge can display the pressure changes inside the container in real time, which reduces the incidence of safety accidents compared with traditional sampling methods.

[0016] (4) Convenient and visual maintenance: The clamp-connected top cover design reduces the equipment disassembly time to less than 1 minute, greatly improving maintenance efficiency; the window allows for clear observation of the material filling situation, facilitating precise control of the sampling amount and avoiding repeated operations due to insufficient sampling. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0018] Figure 1 is a front view of the sampling device provided in an embodiment of the present invention; Figure 2 is a schematic diagram of the connection between the sampling device, vacuum pump and reaction vessel.

[0019] Marked in the image: Sampling device 1; container body 11; top cover 111; shell 112; three-way pipe 113; viewing window 114; first port 11a; second port 11b; third port 11c; fourth port 11d; fifth port 11e; clamping structure 12; vent valve 13; vacuum valve 14; pressure gauge 15; feed valve 16; take-up valve 17; vacuum pump 2; reaction vessel 3. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] As shown in Figures 1 and 2, this embodiment of the present invention provides a sampling device 1, which includes a container body 11. The container body 11 includes a top cover 111 and a shell 112. The top cover 111 is detachably connected to the upper end of the shell 112 by a clamping structure 12. The top of the top cover 111 has a first port 11a, a second port 11b, and a third port 11c. The first port 11a is sealed to a vent valve 13, the second port 11b is sealed to a vacuum valve 14, and the third port 11c is sealed to a pressure gauge 15. The bottom of the shell 112 is fixedly connected to a three-way pipe 113, through which a fourth port 11d and a fifth port 11e are formed. The fourth port 11d is sealed to a feed valve 16, and the fifth port 11e is sealed to a material extraction valve 17. A viewing window 114 is embedded in the side of the shell 112. When sampling the material in the reactor 3, the end of the vacuum valve 14 away from the second port 11b is sealed to the vacuum pump 2, and the end of the feed valve 16 away from the fourth port 11d is sealed to the reactor 3.

[0022] The specific operation process of this utility model is as follows: Preparation stage: Complete the assembly of each valve, pressure gauge 15, vacuum pump 2 and reactor 3 through threaded connection, close vent valve 13, feed valve 16 and take-up valve 17, confirm through window 114 that there is no residual material in the container, and check that the connection of each component (such as clamp structure 12, welding and threaded connection) is well sealed; Vacuuming operation: Open vacuum valve 14, start vacuum pump 2, monitor the pressure inside container body 11 through pressure gauge 15 until the pressure drops to -0.08~-0.09MPa, then close vacuum valve 14 and vacuum pump 2. Material sampling: Slowly open the feed valve 16 and observe the material filling height through the viewing window 114. When the material reaches 80% of the height of the shell 112 (i.e., the center line position of the viewing window 114) and the pressure gauge 15 shows that the pressure has risen to balance with the pressure inside the vessel, close the feed valve 16. Material discharge: Open the vent valve 13. After the pressure inside the container body 11 drops to normal pressure, open the material receiving valve 17 to discharge the material into the sampling bottle. After sampling is completed, close the material receiving valve 17 and the vent valve 13. Equipment cleaning and maintenance: Open the vent valve 13 and the feed valve 17, and introduce purified water or solvent through the vent valve 13 to rinse the inner wall of the container body 11. The rinsing waste liquid is discharged from the feed valve 17. Repeat 2-3 times. If there are stubborn residues, loosen the clamp structure 12 and remove the top cover 111 for manual cleaning. After cleaning, reassemble.

[0023] Through the above technical solution, the sampling device 1 of this utility model embodiment can solve the problems of air residue, cleaning difficulty, safety hazards, and inconvenient maintenance. First, through the synergistic action of vacuum pump 2 and vacuum valve 14, the container body 11 can be evacuated to a vacuum state of -0.08 to -0.09 MPa before sampling. After opening the feed valve 16, the material quickly fills the container under the pressure difference drive, with no air intervention throughout the process, effectively avoiding problems such as material oxidation and volatilization, and ensuring the consistency between the test data and the actual material state inside the container. Second, after sampling, the pressure is balanced through vent valve 13, and the material can be completely discharged from the feed valve 17. During cleaning, cleaning fluid is introduced through vent valve 13, which, together with feed valve 17, achieves circulating rinsing inside the container. Furthermore, pressure gauge 15 can display the pressure changes inside the container in real time. When the pressure fluctuates abnormally, the operator can immediately close the relevant valves to avoid the risk of material extraction, reducing the incidence of safety accidents compared to traditional sampling methods. Finally, the design of the top cover 111 with clamp connection reduces the equipment disassembly time to less than 5 minutes, greatly improving maintenance efficiency; the viewing window 114 allows for clear observation of the material filling status, facilitating precise control of the sampling amount and avoiding repeated operations due to insufficient sampling.

[0024] For example, the container body 11 is a cylindrical, sealed structure made of 304 stainless steel, and the inner wall of the container body 11 is coated with a polytetrafluoroethylene (PTFE) anti-corrosion coating with a thickness of 10-50 micrometers. Using 304 stainless steel balances structural strength and basic corrosion resistance, making it suitable for most non-corrosive working conditions; the PTFE coating can withstand corrosive media such as acids and alkalis, expanding the applicability of the equipment while reducing material adhesion and residue on the container wall.

[0025] For example, the three-way pipe 113 is sealed and welded to the bottom of the housing 112, forming an integrated structure with the housing 112, thereby improving the overall sealing performance and structural stability.

[0026] For example, a sealing element is provided between the mating surfaces of the upper cover 111 and the housing 112. The sealing element is a fluororubber O-ring with a cross-sectional diameter of 4mm, which can withstand a temperature range of -20℃ to 200℃ to ensure that the mating surfaces are sealed without leakage.

[0027] For example, two viewing windows 114 are provided, respectively arranged on opposite sides of the housing 112; the viewing windows 114 are made of borosilicate glass with a thickness of 8mm-12mm, and the edges of the viewing windows 114 are sealed to the housing 112 with epoxy resin. Thus, operators can directly observe the filling height and state of the material inside the container, avoiding blind sampling; furthermore, the symmetrical arrangement of the viewing windows 114 reduces blind spots.

[0028] For example, the vent valve 13, the vacuum valve 14, the feed valve 16, and the sampling valve 17 are all DN15 / DN25 manual ball valves, and the valve sealing surfaces are made of polytetrafluoroethylene (PTFE). The valve connection ends are provided with threads adapted to the corresponding ports. This type of ball valve is suitable for conventional sampling flow requirements, and the manual operation mode requires no additional power source, making it suitable for intermittent sampling scenarios. Accordingly, the PTFE sealing surface can achieve zero-leakage sealing, preventing air infiltration or material leakage during sampling; the threaded adaptation design of the valve and port enables quick disassembly and assembly, improving maintenance efficiency.

[0029] For example, the first port 11a, the second port 11b, the third port 11c, the fourth port 11d, and the fifth port 11e are all provided with external threads, and the thread specifications are adapted to the connection end threads of the corresponding valves and pressure gauges 15. The thread specifications are G1 / 2-G3 / 4, and the standardized external thread specifications are adapted to the connection requirements of conventional valves and pressure gauges 15, with strong versatility.

[0030] For example, the clamp structure 12 is made of 304 stainless steel and generally includes two symmetrical semi-circular clamps and locking bolts, which can realize the quick assembly and disassembly of the upper cover 111 and the housing 112, facilitating internal maintenance and cleaning of dead corners. It should be noted that since the clamp structure 12 is a publicly available product, its specific structure and connection method will not be described in detail here.

[0031] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0032] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A sampling device, characterized in that, The container includes a container body, which comprises a top cover and a shell. The top cover is detachably connected to the upper end of the shell via a clamping structure. The top of the top cover has a first port, a second port, and a third port. The first port is sealed to a vent valve, the second port is sealed to a vacuum valve, and the third port is sealed to a pressure gauge. The bottom of the shell is fixedly connected to a three-way pipe, through which a fourth port and a fifth port are formed. The fourth port is sealed to a feed valve, and the fifth port is sealed to a discharge valve. A viewing window is embedded in the side of the shell.

2. The sampling device according to claim 1, characterized in that, The container body is a cylindrical, sealed structure made of 304 stainless steel.

3. The sampling device according to claim 2, characterized in that, The inner wall of the container body is coated with a polytetrafluoroethylene anti-corrosion coating.

4. The sampling device according to claim 1, characterized in that, The tee pipe is sealed and welded to the bottom of the housing.

5. The sampling device according to claim 1, characterized in that, A sealing element, which is a fluororubber O-ring, is provided between the mating surfaces of the top cover and the housing.

6. The sampling device according to claim 1, characterized in that, The housing has two windows, which are respectively arranged on opposite sides of the housing; the windows are made of borosilicate glass, and the edges of the windows are sealed to the housing with epoxy resin.

7. The sampling device according to claim 1, characterized in that, The vent valve, the vacuum valve, the feed valve, and the take-up valve are all manual ball valves.

8. The sampling device according to claim 1, characterized in that, The first, second, third, fourth, and fifth ports are all equipped with external threads, and the thread specifications are compatible with the connection threads of the corresponding valves and pressure gauges.

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