Device for hermetically collecting sample of liquid formaldehyde product

Abstract

The utility model provides a device for hermetically collecting a sample of a liquid formaldehyde product. The device is characterized in that a first end of a sampling pipe is hermetically connected with a sampling valve; the first end of the cleaning pipe is hermetically connected with the first end of the sampling pipe, and the second end of the cleaning pipe is used for introducing gas; the first stop valve is arranged on the cleaning pipe; the sampling assembly is provided with a liquid inlet pipe and an exhaust pipe which are arranged at intervals; the second end of the sampling pipe is detachably and hermetically connected with the liquid inlet pipe; a cleaning pipe is arranged between the liquid inlet pipe and the sampling valve; the first adsorption assembly is detachably connected with the exhaust pipe in a sealed mode, and the first adsorption assembly is used for adsorbing formaldehyde gas exhausted by the exhaust pipe. According to the device for closed sample collection of the liquid formaldehyde product, the cleaning pipe, the sampling assembly and the first adsorption assembly are integrally and detachably designed, so that the sampling process is more convenient and easy to operate, the body health of sampling personnel is guaranteed, meanwhile, formaldehyde gas is effectively prevented from being diffused into a workshop environment, and the working efficiency is improved. And the air quality in a workshop is ensured.

Description

Technical Field

[0001] The present application relates to the field of chemical production technology, and in particular to a device for collecting samples of liquid formaldehyde products in a closed manner. Background Art

[0002] In the production of liquid formaldehyde or products using liquid formaldehyde as raw material, it is necessary to regularly sample the liquid formaldehyde for physical and chemical property analysis to ensure the quality of the final product. Liquid formaldehyde is easy to volatilize to form gaseous formaldehyde during the sampling process, and gaseous formaldehyde is a toxic and harmful gas. Therefore, it is necessary to prevent the sampling personnel from inhaling gaseous formaldehyde during the sampling process.

[0003] At present, the pipeline for liquid formaldehyde transportation in the production line is equipped with a sampling point, and a control valve is set at the sampling point to control the outflow of liquid formaldehyde. During the sampling process, in order to protect the health of the samplers, the samplers wear gas masks and hold sampling bottles to collect liquid formaldehyde at the sampling point.

[0004] However, when implementing the present invention, the inventors discovered that although gas masks can protect individual samplers, they cannot prevent the volatile gas formaldehyde from diffusing to the entire working environment. As the number of sampling times increases, the formaldehyde concentration in the workshop air may gradually accumulate and exceed the limit, posing a potential hazard to all on-site workers. In addition, gas masks are expensive and can easily cause discomfort when worn. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a device for collecting samples of liquid formaldehyde products in a closed manner, so as to solve the technical problem that the liquid evaporates into the environment and affects the air quality of the environment during the sampling process.

[0006] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] The present application provides a device for collecting samples of liquid formaldehyde products in a closed manner, comprising:

[0008] A sampling tube, wherein a first end of the sampling tube is used for sealing connection with a sampling valve;

[0009] A cleaning tube, wherein a first end of the cleaning tube is sealed and connected to a first end of the sampling tube, and a second end of the cleaning tube is used for introducing gas;

[0010] A first stop valve, disposed on the cleaning pipe;

[0011] The sampling assembly comprises a liquid inlet pipe and an exhaust pipe arranged at intervals; the second end of the sampling pipe is detachably sealed and connected to the first end of the liquid inlet pipe, and the cleaning pipe is arranged between the liquid inlet pipe and the sampling valve;

[0012] The first adsorption component is detachably and hermetically connected to the exhaust pipe, and the first adsorption component is used for adsorbing formaldehyde gas discharged from the exhaust pipe.

[0013] In some modified embodiments of the present application, the first adsorption component includes:

[0014] A first accommodating portion having a first accommodating space;

[0015] A plurality of independent adsorption particles are all placed in the first accommodating space, and the exhaust pipe extends into the plurality of adsorption particles.

[0016] In some embodiments, the first adsorption component further comprises:

[0017] An air intake pipe, wherein a first end of the air intake pipe is detachably and sealedly connected to the exhaust pipe, a second end of the air intake pipe extends into the plurality of adsorption particles, and the air intake pipe is sealedly connected to the first accommodation portion;

[0018] The second stop valve is located outside the first accommodating portion, and the second stop valve is arranged on the air inlet pipe.

[0019] In some embodiments, the first adsorption component comprises:

[0020] The second accommodating portion has a second accommodating space, an air inlet and an air outlet; the air inlet and the air outlet are both connected to the second accommodating space; the exhaust pipe is arranged at the air inlet and is detachably sealed and connected to the second accommodating portion;

[0021] An adsorbent is disposed in the second accommodating space and is sealedly connected to the inner wall of the second accommodating portion; the adsorbent is located between the air inlet and the air outlet.

[0022] In some embodiments, it also includes:

[0023] A reducing tee, wherein the first end of the reducing tee is used for sealing connection with the sampling valve, the second end of the reducing tee opposite to the first end is sealed connected with the first end of the sampling tube, the third end of the reducing tee is sealed connected with the first end of the cleaning tube, the cross-sectional area of ​​the first end of the reducing tee is equal to the cross-sectional area of ​​the second end, and the cross-sectional area of ​​the third end of the reducing tee is smaller than the cross-sectional area of ​​the first end of the reducing tee.

[0024] In some embodiments, it also includes:

[0025] The bearing portion has a bearing surface, the sampling component is placed on or connected to the bearing surface, the first end of the liquid inlet tube is away from the bearing surface relative to the second end; and / or the first adsorption component is placed on or connected to the bearing surface.

[0026] In some embodiments, the carrying part has a containing space and an opening communicating with the containing space, the inside of the carrying part has the carrying surface, the second end of the sampling tube extends into the containing space, and the sampling tube is sealed and connected to the carrying part;

[0027] An operating portion is arranged at the opening and movably connected to the bearing portion, and the operating portion is used to open or close the opening.

[0028] In some embodiments, it also includes:

[0029] The second adsorption component is arranged in the accommodating space. The second adsorption component is placed on or connected to the bearing surface. The second adsorption component is used to adsorb the formaldehyde gas in the accommodating space.

[0030] In some embodiments, it also includes:

[0031] The third stop valve is arranged at the second end of the sampling tube, and the third stop valve is arranged between the liquid inlet tube and the cleaning tube.

[0032] In some embodiments, it also includes:

[0033] The locking clamp is used for clamping the liquid inlet pipe, wherein the liquid inlet pipe is a silicone tube; and / or the exhaust pipe is a silicone tube, wherein the locking clamp is used for clamping the exhaust pipe.

[0034] Compared with the prior art, the present application provides a device for collecting samples of liquid formaldehyde products in a sealed manner. By sealingly connecting a sampling tube with a sampling valve and sealingly connecting a first end of a cleaning tube with a first end of the sampling tube, gas can be introduced into the cleaning tube after sampling to blow the residual formaldehyde liquid in the sampling tube and the liquid inlet tube into the sampling assembly, thereby preventing the residual formaldehyde liquid in the pipeline from volatilizing into the environment after sampling, and preventing the residual formaldehyde liquid from chemically reacting and clogging the sampling tube and the liquid inlet tube; during the sampling process, the first stop valve is closed to prevent the formaldehyde liquid in the sampling tube from volatilizing from the cleaning tube into the environment;

[0035] The second end of the sampling tube is detachably sealed and connected to the liquid inlet tube, which prevents formaldehyde liquid from overflowing from the connection between the two during the sampling process, thereby enhancing the sealing and safety of the sampling process; the exhaust pipe is detachably sealed and connected to the first adsorption component, ensuring that the formaldehyde gas generated during the sampling process can be effectively guided into the first adsorption component and fully adsorbed by the first adsorption component, thereby preventing formaldehyde gas from escaping from the connection between the two. The detachable connection between the liquid inlet tube and the exhaust pipe facilitates the sampling personnel to take the sampling component after sampling.

[0036] The present application discloses a device for collecting samples of liquid formaldehyde products in a closed manner, which adopts an integrated and detachable design of a cleaning tube, a sampling component and a first adsorption component, making the sampling process more convenient and easy to operate, thereby ensuring the health of the sampling personnel and effectively preventing the formaldehyde gas from diffusing into the workshop environment, thereby ensuring the air quality in the workshop and the health of the workshop staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0038] Figure 1 The schematic diagram of the structure of a device for collecting samples of liquid formaldehyde products in the present application is shown schematically.

[0039] Description of Figure Numbers:

[0040] 1. Sampling tube; 2. Cleaning tube; 3. First stop valve; 4. Sampling assembly; 41. Liquid inlet tube; 42. Exhaust tube; 43. Sampling bottle; 44. Sealing cover; 45. First fixed tube; 46. Second fixed tube; 5. First adsorption assembly; 51. First accommodating portion; 52. Adsorbed particles; 53. Inlet tube; 54. Second stop valve; 6. Reducing tee; 7. Carrying portion; 8. Third stop valve; 9. Sampling valve. DETAILED DESCRIPTION

[0041] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0042] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0043] Formaldehyde is an occupational hazard, and its maximum allowable concentration in the environment is 0.5 mg / m 3When the formaldehyde concentration in the environment exceeds this limit, it will harm human health, such as irritating the respiratory tract and eyes, and may even induce more serious health problems. When sampling liquid formaldehyde, due to its high volatility, some of the liquid formaldehyde will be converted into gaseous formaldehyde and escape during the sampling process, posing a direct health threat to the samplers who are close to the source of volatility.

[0044] At present, in order to protect the samplers from the harm of formaldehyde gas, they are required to wear gas masks. Gas masks can block the gas formaldehyde from directly entering the respiratory system of the samplers to a certain extent, providing a certain degree of protection.

[0045] However, the inventors noticed that some formaldehyde will evaporate into the environment during the sampling process, which may cause the concentration of gaseous formaldehyde in the workshop air to exceed the limit, affecting the health of the workshop workers; in addition, the cost of gas masks is high. If everyone is required to wear a gas mask, the company's cost investment will increase significantly, and wearing a gas mask will cause facial discomfort, obstructed vision, poor communication and other problems, making communication between staff and with external personnel difficult, affecting work coordination and efficiency.

[0046] The present application discloses a device for collecting samples of liquid formaldehyde products in a closed manner, which adopts an integrated and detachable design of a cleaning tube 2, a sampling component 4 and a first adsorption component 5, making the sampling process more convenient and easy to operate, thereby ensuring the health of the sampling personnel and effectively preventing the formaldehyde gas from diffusing into the workshop environment, thereby ensuring the air quality in the workshop and the health of the workshop staff.

[0047] like Figure 1 As shown, the present application provides a device for collecting samples of liquid formaldehyde products in a closed manner, comprising:

[0048] A sampling tube 1, wherein a first end of the sampling tube 1 is used for sealing connection with a sampling valve 9;

[0049] A cleaning tube 2, wherein a first end of the cleaning tube 2 is sealedly connected to a first end of the sampling tube 1, and a second end of the cleaning tube 2 is used for introducing gas;

[0050] A first stop valve 3, arranged on the cleaning pipe 2;

[0051] The sampling assembly 4 has a liquid inlet pipe 41 and an exhaust pipe 42 arranged at intervals; the second end of the sampling pipe 1 is detachably sealedly connected to the first end of the liquid inlet pipe 41, and the cleaning pipe 2 is arranged between the liquid inlet pipe 41 and the sampling valve 9;

[0052] The first adsorption component 5 is detachably and hermetically connected to the exhaust pipe 42 , and the first adsorption component 5 is used for adsorbing the formaldehyde gas discharged from the exhaust pipe 42 .

[0053] Specifically, the device of the present application may also include a tee. The first end of the tee is sealed and connected to the sampling valve 9, the second end of the tee opposite to the first end is sealed and connected to the first end of the sampling tube 1, and the third end of the tee is sealed and connected to the first end of the cleaning tube 2. The tee can be connected to each component by threaded connection, clamp connection or flange connection, and a sealing element, such as a sealing ring or a gasket, is provided at the connection to ensure the sealing and reliability of the connection. The second end of the sampling tube 1 is detachably sealed and connected to the first end of the liquid inlet pipe 41, for example, it may also include a quick-connect connector, the second end of the sampling tube 1 is provided with a socket of the quick-connect connector, and the first end of the liquid inlet pipe 41 is provided with a plug of the quick-connect connector to achieve a detachable sealed connection.

[0054] The second end of the cleaning tube 2 is used to pass gas so that the residual formaldehyde liquid in the sampling tube 1 and the liquid inlet tube 41 is blown into the sampling assembly 4, so as to prevent the residual formaldehyde liquid from volatilizing into the environment after the sampling assembly 4 is subsequently removed, and to prevent the residual formaldehyde liquid from chemically reacting and clogging the sampling tube 1 and the liquid inlet tube 41. The second end of the cleaning tube 2 can be detachably and sealedly connected to a first pipeline for passing gas, wherein the gas can be air, nitrogen, argon, etc. In addition, the second end of the cleaning tube 2 can also be detachably and sealedly connected to a second pipeline for passing cleaning liquid, wherein the cleaning liquid can be tap water or pure water, etc. When the sampling tube 1 and / or the liquid inlet tube 41 are blocked by polymerized formaldehyde, the sampling tube 1 can be unblocked by passing cleaning liquid.

[0055] A first stop valve 3 is provided on the cleaning tube 2. During the sampling process, the first stop valve 3 is closed to prevent the liquid in the sampling tube 1 from evaporating from the cleaning tube 2 into the environment.

[0056] The sampling assembly 4 includes a sampling bottle 43 and a sealing cover 44. The sealing cover 44 can be threadedly connected to the bottle mouth of the sampling bottle 43, and a sealing ring or a gasket can be provided at the connection to ensure sealing. The sampling bottle 43 is a container for storing samples. The sealing cover 44 is provided with a spaced liquid inlet and an exhaust port. The second end of the liquid inlet pipe 41 extends into the sampling bottle 43 through the liquid inlet, and the first end of the exhaust pipe 42 extends into the sampling bottle 43 through the exhaust port. The first end of the exhaust pipe 42 can be close to the sealing cover 44 to prevent the liquid in the sampling bottle 43 from entering the exhaust pipe 42. The exhaust pipe 42 can maintain the air pressure balance in the sampling bottle 43 and introduce the volatilized gas in the sampling bottle 43 into the first adsorption assembly 5. The liquid inlet pipe 41 and the exhaust pipe 42 are both sealed and connected to the sealing cover 44. For example, a sealing element is provided at the connection to prevent the formaldehyde liquid or gas from leaking from the connection gap. In order to avoid clogging of the liquid inlet pipe 41 during sampling, the diameter of the liquid inlet pipe 41 may be greater than or equal to the diameter of the exhaust pipe 42 .

[0057] The second ends of the liquid inlet and the exhaust port may be provided with detachable plugs to prevent the gas in the sampling bottle 43 from volatilizing into the environment after sampling.

[0058] In order to facilitate observation of the volume of the sampled liquid, the sampling bottle 43 can be made of a transparent material, such as a transparent glass bottle or a transparent plastic bottle.

[0059] The first adsorption component 5 adsorbs the formaldehyde gas discharged from the exhaust pipe 42, so that the formaldehyde gas volatilized during the sampling process can be effectively treated. The adsorption material of the first adsorption component 5 can be selected from activated carbon, molecular sieve, etc.

[0060] Compared with the prior art, the present application provides a device for collecting samples of liquid formaldehyde products in a sealed manner. By sealingly connecting the sampling tube 1 with the sampling valve 9 and sealingly connecting the first end of the cleaning tube 2 with the first end of the sampling tube 1, the cleaning tube 2 can be used to pass gas after sampling to blow the residual formaldehyde liquid in the sampling tube 1 and the liquid inlet tube 41 into the sampling assembly 4, thereby preventing the residual formaldehyde liquid in the pipeline from volatilizing into the environment after sampling, and preventing the residual formaldehyde liquid from chemically reacting and clogging the sampling tube 1 and the liquid inlet tube 41; during the sampling process, the first stop valve 3 is closed to prevent the formaldehyde liquid in the sampling tube 1 from volatilizing from the cleaning tube 2 into the environment;

[0061] The second end of the sampling tube 1 is detachably sealed with the liquid inlet tube 41 to prevent formaldehyde liquid from overflowing from the connection between the two during the sampling process, thereby enhancing the sealing and safety of the sampling process; the exhaust pipe 42 is detachably sealed with the first adsorption component 5 to ensure that the formaldehyde gas generated during the sampling process can be effectively guided into the first adsorption component 5 and fully adsorbed by the first adsorption component 5, thereby preventing formaldehyde gas from escaping from the connection between the two. The detachable connection between the liquid inlet tube 41 and the exhaust pipe 42 facilitates the sampling personnel to take the sampling component 4 after sampling.

[0062] The present application discloses a device for collecting samples of liquid formaldehyde products in a closed manner, which adopts an integrated and detachable design of a cleaning tube 2, a sampling component 4 and a first adsorption component 5, making the sampling process more convenient and easy to operate, thereby ensuring the air quality of the workshop and effectively preventing formaldehyde gas from diffusing into the workshop environment, thereby ensuring the air quality in the workshop and further ensuring the health of the workshop staff.

[0063] like Figure 1 As shown, in some embodiments, the first adsorption component 5 includes:

[0064] The first accommodating portion 51 has a first accommodating space;

[0065] A plurality of independent adsorption particles 52 are placed in the first accommodation space, and the exhaust pipe 42 extends into the plurality of adsorption particles 52 .

[0066] Specifically, the first accommodating portion 51 is used to accommodate a plurality of independent adsorption particles 52. The first accommodating portion 51 may be cylindrical, box-shaped or other shapes. The first accommodating portion 51 has an air inlet and an exhaust port spaced apart, and both the air inlet and the exhaust port are connected to the first accommodating space. The air inlet and the exhaust port may be both arranged on the side away from the supporting surface where the first accommodating portion 51 is located, so that the formaldehyde gas can pass through the entire adsorption layer to maximize the adsorption effect; the second end of the exhaust pipe 42 extends into the plurality of adsorption particles 52 through the air inlet to ensure that the formaldehyde gas is in full contact with the adsorption particles 52, and after being efficiently adsorbed by the plurality of adsorption particles 52, it is discharged into the environment through the exhaust port, thereby achieving effective adsorption and treatment of the formaldehyde gas discharged from the exhaust pipe 42. The adsorption particles 52 may be selected from activated carbon particles, molecular sieves, and the like.

[0067] In order to facilitate the taking of the sampling component 4 after sampling, Figure 1 As shown, in some embodiments, the first adsorption component 5 further includes:

[0068] An air intake pipe 53, wherein a first end of the air intake pipe 53 is detachably and sealedly connected to the exhaust pipe 42, a second end of the air intake pipe 53 extends into the plurality of adsorption particles 52, and the air intake pipe 53 is sealedly connected to the first accommodation portion 51;

[0069] The second stop valve 54 is located outside the first accommodating portion 51 , and the second stop valve 54 is provided in the air intake pipe 53 .

[0070] Specifically, the first end of the air intake pipe 53 and the second end of the air exhaust pipe 42 can be detachably sealed and connected via a quick-connect connector, and the second end of the air intake pipe 53 extends into the plurality of adsorption particles 52 in the first accommodating space through the air inlet.

[0071] The second stop valve 54 is used to control the opening and closing of the air inlet pipe 53. When sampling is completed, the sampling assembly 4 can be removed and the second stop valve 54 can be closed to prevent the formaldehyde gas in the air inlet pipe 53 from escaping from the first end of the air inlet pipe 53 to the environment.

[0072] In some embodiments, the first adsorption component 5 includes:

[0073] The second accommodating portion (not shown in the figure) has a second accommodating space, an air inlet and an air outlet; the air inlet and the air outlet are both connected to the second accommodating space; the exhaust pipe 42 is arranged at the air inlet and is detachably sealed and connected to the second accommodating portion;

[0074] An adsorption member (not shown in the figure) is arranged in the second accommodating space and is sealedly connected to the inner wall of the second accommodating portion; the adsorption member is located between the air inlet and the air outlet.

[0075] Specifically, the shape of the second accommodating portion may refer to the shape of the first accommodating portion 51. The adsorbent may be honeycomb activated carbon, which may be sealed and connected to the inner wall of the second accommodating portion by means of a sealing ring or a buckle, so as to ensure high efficiency of the adsorption process.

[0076] like Figure 1 As shown, in some embodiments, it also includes:

[0077] A reducing tee 6, wherein the first end of the reducing tee 6 is used for sealing connection with the sampling valve 9, the second end of the reducing tee 6 opposite to the first end is sealed connected with the first end of the sampling tube 1, the third end of the reducing tee 6 is sealed connected with the first end of the cleaning tube 2, the cross-sectional area of ​​the first end of the reducing tee 6 is equal to the cross-sectional area of ​​the second end, and the cross-sectional area of ​​the third end of the reducing tee 6 is smaller than the cross-sectional area of ​​the first end of the reducing tee.

[0078] Specifically, the reducing tee 6 can be obtained by purchasing from the market. The cross-sectional area of ​​the third end of the reducing tee 6 is smaller than that of the first end, that is, the gas with the same flow rate has a higher flow rate here, and the higher purge speed can more advantageously clear the residual formaldehyde liquid in the sampling tube 1, so that the residual liquid in the sampling tube 1 and the liquid inlet pipe 41 can enter the sampling assembly 4, further avoiding the residual formaldehyde liquid from volatilizing into the environment after sampling, and preventing the residual formaldehyde liquid from chemically reacting to block the sampling tube 1 and the liquid inlet pipe 41.

[0079] like Figure 1 As shown, in some embodiments, it also includes:

[0080] The carrying portion 7 has a carrying surface, the sampling component 4 is placed on or connected to the carrying surface, the first end of the liquid inlet tube 41 is away from the carrying surface relative to the second end; and / or the first adsorption component 5 is placed on or connected to the carrying surface.

[0081] Specifically, the sampling bottle 43 can be placed directly on the bearing surface; or, a positioning groove can be provided on the bearing surface, and the sampling bottle 43 can be removably embedded in the bearing part 7 through the positioning groove to prevent the sampling bottle 43 from tipping over during the sampling process, thereby ensuring the stable sampling operation. The first end of the liquid inlet tube 41 is away from the bearing surface relative to the second end, so that the liquid in the liquid inlet tube 41 can flow into the sampling bottle 43 more smoothly under the action of gravity, thereby reducing the formaldehyde residue in the liquid inlet tube 41. The first adsorption component 5 can be placed directly on the bearing surface; or, a limiting groove can be provided on the bearing surface, and the first adsorption component 5 can be connected to the bearing part 7 by embedding the limiting groove to prevent the first adsorption component 5 from tipping over.

[0082] By designing the bearing portion 7, stable support is provided for the sampling component 4 and / or the first adsorption component 5, making the entire sampling process more labor-saving.

[0083] like Figure 1 As shown, in some embodiments, the carrying portion 7 has a containing space and an opening communicating with the containing space, the inside of the carrying portion 7 has the carrying surface, the second end of the sampling tube 1 extends into the containing space, and the sampling tube 1 is sealed and connected to the carrying portion 7;

[0084] An operating portion (not shown in the figure) is disposed at the opening and movably connected to the bearing portion 7, and the operating portion is used to open or close the opening.

[0085] Specifically, sealing elements such as sealing rings, gaskets or sealants can be provided at the connection between the sampling tube 1 and the bearing part 7. The bearing part 7 as a whole can be box-shaped or cylindrical, and its opening is used to take the sampling assembly 4. The operating part can be slidably connected, rotatably connected or hinged to the bearing part 7, and its specific connection method can be designed according to the overall layout of the equipment and operational requirements. Sealing pads can be provided at the openings of the operating part and the bearing part 7 to achieve sealing when the opening is closed. The operating part can be equipped with a handle, a knob, etc., which is convenient for the user to manually open and close.

[0086] The carrying portion 7 and the operating portion can form a relatively closed environment, thereby reducing the direct contact between external dust and impurities and the sampling tube 1 and the first adsorption component 5, thereby reducing the risk of dust contamination.

[0087] In some embodiments, it also includes:

[0088] A second adsorption component (not shown in the figure) is arranged in the accommodating space. The second adsorption component is placed on or connected to the bearing surface. The second adsorption component is used to adsorb formaldehyde gas in the accommodating space.

[0089] Specifically, the second adsorption component and the first adsorption component 5 work together to form a double adsorption of formaldehyde gas. The second adsorption component may include a third accommodating portion and a plurality of independent adsorption particles, the third accommodating portion having an open third accommodating space, and the third accommodating space is used to accommodate a plurality of independent adsorption particles 52. The third accommodating portion may be placed on the bearing surface, or the third accommodating portion may be connected to the bearing surface by snapping, bonding, or the like.

[0090] like Figure 1 As shown, in some embodiments, it also includes:

[0091] The third stop valve 8 is disposed at the second end of the sampling tube 1 , and the third stop valve 8 is disposed between the liquid inlet tube 41 and the cleaning tube 2 .

[0092] Specifically, the third stop valve 8 is used to control the opening and closing of the sampling tube 1. When the sampling operation is performed, the third stop valve 8 is opened to allow the formaldehyde liquid to flow to the sampling component 4 through the sampling tube 1 and the liquid inlet pipe 41, thereby ensuring that the sampling process proceeds smoothly; during the non-sampling period or after the sampling is completed, the third stop valve 8 is closed to block the flow path of the residual formaldehyde liquid in the sampling tube 1 to prevent it from directly volatilizing into the environment, thereby helping to reduce the risk of environmental pollution.

[0093] In some embodiments, it also includes:

[0094] A locking clamp (not shown in the figure), wherein the liquid inlet pipe 41 is a silicone tube, and the locking clamp is used to clamp the liquid inlet pipe 41 ; and / or, the exhaust pipe 42 is a silicone tube, and the locking clamp is used to clamp the exhaust pipe 42 .

[0095] Specifically, since the silicone tube has a certain elasticity, it can be installed on other pipelines to achieve a detachable sealed connection, which not only improves the convenience of operation but also reduces the cost.

[0096] The locking clamp is used to clamp the second end of the liquid inlet pipe 41 and / or the second end of the exhaust pipe 42 after the sampling is completed, so as to prevent the formaldehyde in the sampling bottle 43, the liquid inlet pipe 41 and the exhaust pipe 42 from escaping into the environment, and also prevent the dust in the environment from entering the sampling bottle 43, thereby ensuring the accuracy of the test results. In the present application, the liquid inlet pipe 41 and the exhaust pipe 42 are preferably silicone tubes.

[0097] The sampling assembly 4 may further include a first fixed tube 45 and a second fixed tube 46. The first fixed tube 45 passes through the liquid inlet and is sealed and connected to the sealing cover 44. The first end of the liquid inlet tube 41 may be sleeved on the first fixed tube 45. The second fixed tube 46 passes through the exhaust port and is sealed and connected to the sealing cover 44. The first end of the exhaust tube 42 may be sleeved on the second fixed tube 46. The diameter of the first fixed tube 41 may be greater than or equal to the diameter of the second fixed tube 42 to prevent the first fixed tube 41 from being blocked by liquid.

[0098] The first fixed tube 41 and the second fixed tube 42 serve as a hard skeleton structure, providing stable support for the flexible silicone tube (i.e., the liquid inlet tube 41 and the exhaust tube 42). In this way, the silicone tube will not be excessively bent or deformed due to its own elasticity when it is sleeved on the fixed tube, ensuring the correct layout and fixation of the pipeline, which is conducive to maintaining the overall structural stability of the device for collecting samples of liquid formaldehyde products in a closed manner.

[0099] The working process of this application is as follows:

[0100] 1. Sealing test

[0101] Close the sampling valve 9, connect the liquid inlet pipe 41 of the sampling assembly 4 to the sampling pipe 1, and connect the exhaust pipe 42 to the first adsorption assembly 5 to form a closed system;

[0102] The cleaning pipe 2 is connected to the first pipeline, the first stop valve 3 and the third stop valve 8 are opened, ventilation is performed for 1-2 minutes, and then the first stop valve 3 is closed.

[0103] During this period, pay close attention to whether there is gas discharge from the first adsorption component 5. If so, it indicates that the sealing is good; if not, there may be a poor sealing problem, and the connection points of each connecting component need to be inspected.

[0104] 2. Replacement before sampling

[0105] After confirming that the sealing test is qualified, the sampling valve 9 is opened to allow the formaldehyde liquid to flow into the sampling bottle 43. When the liquid level in the sampling bottle 43 reaches half of the full scale, the sampling valve 9 is closed to complete the preliminary cleaning of the sampling tube;

[0106] Open the first stop valve 3 to allow the gas in the clean pipe 2 to enter the sampling pipe 1, and then close the third stop valve 8 and the second stop valve 54 to block the clean gas from continuing to flow;

[0107] The second end of the liquid inlet pipe 41 and the second end of the exhaust pipe 42 are clamped by using a locking clamp.

[0108] During this process, if there is no formaldehyde liquid in the sampling bottle 43, it means that the pipeline is blocked by polymerized formaldehyde. At this time, it is necessary to close the sampling valve 9, connect the second end of the cleaning tube 2 to the second pipeline, and then open the first stop valve 3 and the third stop valve 8 to clean the pipeline. After cleaning, re-operate the pre-sampling replacement step.

[0109] 3. Sampling

[0110] Prepare a new sampling assembly 4, reconnect its liquid inlet pipe 41 to the sampling pipe 1, reconnect the exhaust pipe 42 to the first adsorption assembly 5, and start the formal sampling process;

[0111] After sampling is completed, close the sampling valve 9, open the first stop valve 3 for ventilation for 1-2 minutes, then close the first stop valve 3, close the third stop valve 8, close the second stop valve 54 in sequence, and use the locking clamp to clamp the second end of the liquid inlet pipe 41 and the second end of the exhaust pipe 42 respectively to complete the sampling operation.

[0112] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A device for collecting samples of liquid formaldehyde products in a sealed manner, characterized in that: include: A sampling tube, wherein a first end of the sampling tube is used for sealing connection with a sampling valve; A cleaning tube, wherein a first end of the cleaning tube is sealed and connected to a first end of the sampling tube, and a second end of the cleaning tube is used for introducing gas; A first stop valve, disposed on the cleaning pipe; The sampling assembly comprises a liquid inlet pipe and an exhaust pipe arranged at intervals; the second end of the sampling pipe is detachably sealed and connected to the first end of the liquid inlet pipe, and the cleaning pipe is arranged between the liquid inlet pipe and the sampling valve; The first adsorption component is detachably and hermetically connected to the exhaust pipe, and the first adsorption component is used for adsorbing formaldehyde gas discharged from the exhaust pipe.

2. The device for collecting samples of liquid formaldehyde products in a sealed manner according to claim 1, characterized in that: The first adsorption component comprises: A first accommodating portion having a first accommodating space; A plurality of independent adsorption particles are all placed in the first accommodating space, and the exhaust pipe extends into the plurality of adsorption particles.

3. The device for collecting samples of liquid formaldehyde products in a sealed manner according to claim 2, characterized in that: The first adsorption component also includes: An air intake pipe, wherein a first end of the air intake pipe is detachably and sealedly connected to the exhaust pipe, a second end of the air intake pipe extends into the plurality of adsorption particles, and the air intake pipe is sealedly connected to the first accommodation portion; The second stop valve is located outside the first accommodating portion, and the second stop valve is arranged on the air inlet pipe.

4. The device for collecting samples of liquid formaldehyde products in a sealed manner according to claim 1, characterized in that: The first adsorption component comprises: The second accommodating portion has a second accommodating space, an air inlet and an air outlet; the air inlet and the air outlet are both connected to the second accommodating space; the exhaust pipe is arranged at the air inlet and is detachably sealed and connected to the second accommodating portion; An adsorbent is disposed in the second accommodating space and is sealedly connected to the inner wall of the second accommodating portion; the adsorbent is located between the air inlet and the air outlet.

5. The device for collecting samples of liquid formaldehyde products in a sealed manner according to claim 1, characterized in that: Also includes: A reducing tee, wherein the first end of the reducing tee is used for sealing connection with the sampling valve, the second end of the reducing tee opposite to the first end is sealed connected with the first end of the sampling tube, the third end of the reducing tee is sealed connected with the first end of the cleaning tube, the cross-sectional area of ​​the first end of the reducing tee is equal to the cross-sectional area of ​​the second end, and the cross-sectional area of ​​the third end of the reducing tee is smaller than the cross-sectional area of ​​the first end of the reducing tee.

6. The device for collecting samples of liquid formaldehyde products in a sealed manner according to claim 1, characterized in that: Also includes: The bearing part has a bearing surface, the sampling assembly is placed on or connected to the bearing surface, and the first end of the liquid inlet tube is away from the bearing surface relative to the second end; And / or, the first adsorption component is placed on or connected to the supporting surface.

7. The device for collecting samples of liquid formaldehyde products in a sealed manner according to claim 6, characterized in that: The bearing part has a containing space and an opening communicating with the containing space, the bearing part has the bearing surface inside, the second end of the sampling tube extends into the containing space, and the sampling tube is sealed and connected to the bearing part; An operating portion is arranged at the opening and movably connected to the bearing portion, and the operating portion is used to open or close the opening.

8. The device for collecting samples of liquid formaldehyde products in a sealed manner according to claim 7, characterized in that: Also includes: The second adsorption component is arranged in the accommodating space. The second adsorption component is placed on or connected to the bearing surface. The second adsorption component is used to adsorb the formaldehyde gas in the accommodating space.

9. The device for collecting samples of liquid formaldehyde products in a sealed manner according to claim 1, characterized in that: Also includes: The third stop valve is arranged at the second end of the sampling tube, and the third stop valve is arranged between the liquid inlet tube and the cleaning tube.

10. The device for collecting samples of liquid formaldehyde products in a sealed manner according to claim 1, characterized in that: Also includes: The locking clamp is used for clamping the liquid inlet pipe, wherein the liquid inlet pipe is a silicone tube; and / or the exhaust pipe is a silicone tube, wherein the locking clamp is used for clamping the exhaust pipe.

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