Constant-temperature constant-pressure solution collecting device

Abstract

The application relates to the technical field of solution collection and detection, in particular to a constant-temperature and constant-pressure solution collection device, which comprises a thermostat with a cavity for containing liquid heat exchange medium, a constant-temperature assembly for keeping the liquid heat exchange medium in the cavity at a set temperature range, a conveying pipe body immersed in the liquid heat exchange medium and used for guiding and detecting a solution, a buoyancy ball slidingly connected in a flexible pipe and used for cutting off air contact, a buffer exhaust assembly arranged at the top of the conveying pipe body, a back pressure valve arranged at the outlet end of the conveying pipe body, a bidirectional metering pump arranged at the inlet end of the conveying pipe body and the like, and the conveying pipe body and the buffer exhaust assembly have special structural designs. The application can collect the solution under the condition of constant temperature and constant pressure, greatly reduces the time of exposing the detection solution to the external atmosphere, buffers pressure waves, ensures that the detection solution is conveyed at a set pressure, and can accurately control the temperature of the liquid heat exchange medium.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solution collection and detection, in particular to a constant-temperature and constant-pressure solution collection device. BACKGROUND

[0002] In the field of solution collection and detection, accurate solution collection is crucial for obtaining accurate detection results. With the continuous development of technology, the requirements for solution collection are also increasing, especially when sampling and detecting solutions containing gas, the temperature and pressure are more sensitive, and it is necessary to ensure that the collected solution is transported and stored under constant temperature and pressure. This not only relates to the accuracy and reliability of the detection data, but also has an important influence on the efficiency and quality of the entire detection process.

[0003] In order to realize the collection of solution, there are many traditional methods. One is to use ordinary pipeline to transport solution, relying on the natural environment to maintain the temperature of the solution during transportation, without additional temperature control; for pressure control, usually rely on gravity or simple pressure regulating valve to realize the transportation of solution; another way is to use ordinary container to store and collect solution, without special device to isolate air, solution is directly exposed to the atmosphere; some methods do not set special structure in the conveying pipeline, let the solution flow freely, and there is no effective buffer treatment for pressure wave in the solution transportation process.

[0004] However, these existing technical means have obvious defects. The ordinary pipeline transportation and the temperature maintenance by relying on the natural environment cannot guarantee that the solution remains within the set temperature range during transportation, and is easily affected by the external environment temperature, causing changes in the physical and chemical properties of the solution. The collection method without air isolation will cause the solution to be in contact with the external atmosphere for a long time, which may cause problems such as oxidation and volatilization of the solution, affecting the composition and detection results of the solution; and the existing technical means do not effectively buffer the pressure wave and lack precise pressure control, which will cause the pressure of the solution to be unstable during transportation, also affecting the accuracy and stability of solution collection. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the present application provides a constant-temperature and constant-pressure solution collection device, which can keep the detection solution in a constant-temperature and constant-pressure state when collecting the solution, ensure the stability of the physical and chemical properties of the detection solution, and the synergistic effect of the buffer exhaust assembly and the buoyancy ball can also reduce the contact time of the detection liquid with the external atmosphere, reduce the exposure time, and reduce the problems of solution oxidation, gas release, etc.

[0006] The present application is realized by the following technical scheme:

[0007] A constant-temperature and constant-pressure solution collection device, comprising:

[0008] An incubator having a cavity for containing a liquid heat exchange medium;

[0009] An incubation assembly for maintaining the liquid heat exchange medium in the cavity within a set temperature range;

[0010] A delivery tube immersed in the liquid heat exchange medium for leading the detection solution to a set container, comprising an isolation shaped tube and a flexible tube in a lumen of the isolation shaped tube;

[0011] A buoyancy ball slidingly connected in the flexible tube and capable of abutting against a top surface of the detection liquid during the delivery of the detection liquid by the delivery tube to cut off the contact with the outside atmosphere;

[0012] A buffer air exhaust assembly arranged at a top of the delivery tube and capable of exhausting air in the lumen of the delivery tube above an upper end of the buoyancy ball during the delivery of the detection liquid by the delivery tube and of applying an elastic support force to the buoyancy ball after the air in the lumen of the delivery tube is exhausted to form a seal at the top of the delivery tube and to buffer pressure waves of the detection liquid in the delivery tube;

[0013] A back pressure valve arranged at an outlet end of the buffer air exhaust assembly on the delivery tube for facilitating the delivery of the detection solution to the set container at a set pressure;

[0014] A bidirectional metering pump arranged at an inlet end of the delivery tube and capable of providing a forward delivery power for the detection solution and driving the buoyancy ball to move upward to exhaust the air in the delivery tube from the buffer air exhaust assembly when outputting in a forward direction and of forming a negative pressure in the delivery tube and driving the buoyancy ball to move downward to exhaust the air in the delivery tube from the pump outlet when outputting in a reverse direction.

[0015] By adopting the above technical solutions, the incubator and the incubation assembly can maintain the liquid heat exchange medium within a set temperature range to provide a stable temperature environment for the detection solution, the delivery tube leads the detection solution to the set container, the combination of the isolation shaped tube and the flexible tube guarantees the stability of the delivery, the buoyancy ball abuts against the top surface of the detection liquid during the delivery to cut off the contact with the air and avoid the influence of the air on the detection solution, the buffer air exhaust assembly applies the elastic support force to the buoyancy ball after exhausting the air to form a seal and buffer the pressure waves, the back pressure valve facilitates the delivery of the detection solution at a set pressure to guarantee the stability of the collection pressure, and the bidirectional metering pump realizes the functions of providing power for the detection solution and exhausting the air when outputting in the forward and reverse directions, respectively.

[0016] Optionally, the isolation shaped tube comprises, from inside to outside, a graphene layer and a heat conductive metal layer.

[0017] By adopting the technical scheme, the gas deposition graphene layer has good chemical stability and barrier property, and can prevent the detection solution from exchanging substances with the outside world; the heat-conducting metal layer can effectively conduct heat, so that the conveying pipe body can better exchange heat with the liquid heat exchange medium, and the constant temperature effect of the device is improved.

[0018] Optionally, the flexible pipe is made of rubber material, and the inner wall of the flexible pipe is coated with a hydrophilic coating; the outer wall of the cavity is coated with a heat preservation layer.

[0019] By adopting the technical scheme, the flexible pipe made of rubber material can ensure good flexibility, the inner wall coated with a hydrophilic coating can reduce the flow resistance of the detection solution in the pipe, and also can reduce the friction between the buoyant ball and the flexible pipe, so that the buoyant ball can move more smoothly in the flexible pipe; and the outer wall of the cavity is coated with a heat preservation layer, which can reduce heat loss, so that the liquid heat exchange medium in the cavity can be better maintained within the set temperature range.

[0020] Optionally, the flexible pipe is uniformly distributed with a plurality of micro-ribs in a "V" structure.

[0021] By adopting the technical scheme, the micro-rib structure can reduce the flow resistance of the detection solution in the flexible pipe, dissipate turbulent flow energy as laminar flow, and improve the solution conveying efficiency; specifically, the "ridge-valley" structure of the micro-rib can destroy the hairpin vortex in the turbulent boundary layer, prevent it from merging into a large-scale vortex, and thus suppress turbulent pulsation; and the reverse secondary vortex generated at the top of the micro-rib can interact with the main stream turbulent vortex, converting turbulent kinetic energy into viscous dissipation.

[0022] Optionally, the conveying pipe body has a spiral structure, and the conveying pipe body is vertically arranged in the cavity; the micro-ribs are arranged along the spiral angle direction of the conveying pipe body.

[0023] By adopting the technical scheme, the spiral structure can extend the path of the conveying pipe body in a limited volume, so that the detection solution can be fully heat exchanged to maintain itself at a set temperature, further ensuring the stability of the physical and chemical properties of the detection solution, and the spiral line of the spiral flow channel is aligned with the direction of the micro-ribs, arranged along the spiral angle direction of the conveying pipe body, which can further suppress turbulent disturbance, maintain laminar flow, reduce the overflow of dissolved gas in the solution, and ensure the stability of the physical and chemical properties of the detection solution.

[0024] Optionally, the buffer exhaust assembly comprises a cylinder, a containing cavity is formed in the middle of the cylinder; the bottom of the containing cavity is provided with a connecting port for communicating with the delivery pipe body, the top is provided with a gas permeation port for communicating with the outside atmosphere, and a piston plate is slidably connected in the containing cavity; the piston plate divides the containing cavity into a buffer cavity and a gas permeation cavity from top to bottom, and the piston plate is provided with a gas permeation hole; the buoyancy ball can enter the gas permeation cavity, and a gas permeation space is formed between the buoyancy ball and the gas permeation cavity; the diameter of the buoyancy ball is matched with the inner diameter of the flexible pipe, and the buoyancy ball can slide in the lumen of the flexible pipe; the buffer cavity is provided with an elastic member for providing elastic support force to the piston plate.

[0025] By adopting the above technical scheme, the buffer exhaust assembly ensures the smooth exhaust of air, the top sealing and the effective buffering of pressure wave of the constant-temperature and constant-pressure solution collecting device during the detection solution delivery process through reasonable structural design and the collaborative work of various components, improves the stability and reliability of the device, ensures that the detection solution can be accurately delivered to the specified container under the condition of constant temperature and constant pressure, and ensures the authenticity of the detection data.

[0026] Further optionally, the lower end of the piston plate and the bottom end of the gas permeation cavity are both provided with a tapered guide surface.

[0027] By adopting the above technical scheme, after the buffer exhaust assembly exhausts the air located at the upper end of the buoyancy ball in the lumen of the delivery pipe body, the tapered guide surface of the lower end of the piston plate and the bottom end of the gas permeation cavity can guide the buoyancy ball to accurately adhere to the bottom of the gas permeation cavity, better form a seal at the top of the delivery pipe body, and further isolate the contact with the air in the delivery pipe body.

[0028] Further optionally, a plurality of partition plates are slidably connected in the buffer cavity, the buffer cavity is divided into a plurality of unit cavities which are in communication with each other by the partition plates, the unit cavities are all provided with elastic members, and the elastic coefficient of the elastic member close to the buoyancy ball is smaller than that of the elastic member far from the buoyancy ball.

[0029] By adopting the above technical scheme, during the delivery of the detection liquid by the delivery pipe body, the buffer exhaust assembly can exhaust the air located at the upper end of the buoyancy ball in the lumen of the delivery pipe body, apply an elastic support force to the buoyancy ball after the air is exhausted, form a seal at the top of the delivery pipe body and buffer the pressure wave of the detection liquid; a plurality of partition plates are arranged in the buffer cavity to divide it into a plurality of unit cavities, each unit cavity is provided with an elastic member, and the elastic coefficient of the elastic member close to the buoyancy ball is smaller than that of the elastic member far from the buoyancy ball, which can provide different degrees of elastic support force according to the different positions of the buoyancy ball, better buffer different degrees of pressure wave, improve the sealing effect and buffering performance, and enable the detection solution to be delivered to the specified container at a stable pressure.

[0030] Optionally, the constant temperature assembly comprises a heating assembly, a refrigeration assembly and a temperature sensor; the heating assembly is used to provide heat for the liquid heat exchange medium, so as to increase the temperature of the liquid heat exchange medium; the refrigeration assembly is used to absorb the heat of the liquid heat exchange medium, so as to decrease the temperature of the liquid heat exchange medium; the temperature sensor is used to sense the temperature of the liquid heat exchange medium in real time; the heating assembly, the heating assembly and the temperature sensor are electrically connected with the control unit of the device; the control unit adjusts the working state of the heating assembly or the refrigeration assembly according to the temperature value fed back by the temperature sensor, so as to make the liquid heat exchange medium be in the set temperature range.

[0031] By adopting the above technical scheme, the heating assembly can increase the temperature of the liquid heat exchange medium, the refrigeration assembly can decrease the temperature of the liquid heat exchange medium, the temperature sensor senses the temperature in real time, the control unit adjusts the working state of the heating assembly or the refrigeration assembly according to the feedback, so as to make the liquid heat exchange medium be in the set temperature range, and the constant temperature conveying of the detection solution is realized.

[0032] Further optionally, the heating assembly comprises an electric heating pipe immersed in the liquid heat exchange medium, the electric heating pipe is electrically connected with the control unit; the refrigeration assembly comprises a compressor and an evaporation pipe; the electric heating pipe is immersed in the bottom of the liquid heat exchange medium; the evaporation pipe is immersed in the liquid heat exchange medium and located at the upper end of the electric heating pipe.

[0033] By adopting the technical scheme, the electric heating pipe is immersed in the liquid heat exchange medium and electrically connected with the control unit, heat can be provided for the liquid heat exchange medium to make it warm under the regulation of the control unit; as the existing refrigeration technology, the compressor and the evaporation pipe form a refrigeration assembly, which can absorb the heat of the liquid heat exchange medium to make it cool; the electric heating pipe is immersed at the bottom of the liquid heat exchange medium, and the evaporation pipe is immersed in the liquid heat exchange medium and located above the electric heating pipe, so that an efficient and stable heat convection circulation is formed, and the temperature regulation effect and efficiency of the liquid heat exchange medium are greatly improved. When the electric heating pipe works, it heats the liquid heat exchange medium at the bottom, the temperature of the heated liquid heat exchange medium rises, and the density becomes smaller, so it naturally flows upward. The evaporation pipe located above the electric heating pipe absorbs the heat of the surrounding liquid heat exchange medium under the action of the refrigeration assembly, so that the temperature of this part of the liquid heat exchange medium decreases, the density increases, and then flows downward. In this way, a continuous and stable heat convection circulation is formed. This heat convection circulation enables the liquid heat exchange medium to fully exchange heat, avoids the occurrence of excessive local temperature difference, and makes the temperature of the entire liquid heat exchange medium more uniform. At the same time, due to the existence of heat convection, heat transfer is more rapid, and whether it is the heating or refrigeration process, the set temperature range can be reached faster, improving the response speed of temperature regulation. In addition, the stable heat convection circulation can also reduce energy waste, because it makes the heating and refrigeration processes more efficient, reducing unnecessary energy consumption. Moreover, a uniform temperature environment is crucial for the constant-temperature and constant-pressure solution collection device, which can ensure that the detection solution is in a stable temperature condition during the collection process, thereby improving the accuracy and reliability of the detection results.

[0034] In summary, the present application has at least one of the following beneficial technical effects:

[0035] The present application keeps the liquid heat exchange medium in the set temperature range through the constant-temperature assembly, and the outer wall of the cavity is covered with a heat preservation layer to ensure that the detection solution is at the set temperature during transportation, avoid being affected by the external environment temperature, and ensure the stability of the physical and chemical properties of the solution;

[0036] The buoyancy ball of the present application reduces the contact time of the detection liquid with the atmosphere, reduces the problems of oxidation and volatilization of the detection liquid, and ensures the stability of the composition of the detection liquid;

[0037] The buffer exhaust assembly of the present application exhausts air in the lumen of the delivery pipe body and buffers pressure waves, the back pressure valve promotes the detection solution to be delivered at a set pressure, and the bidirectional metering pump provides delivery power to ensure the stability of the solution delivery pressure and improve the accuracy and stability of solution collection. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1is the internal structure diagram of the constant-temperature and constant-pressure solution collection device described in embodiment one;

[0039] Figure 2 is the structure diagram of the delivery pipe body described in embodiment one;

[0040] Figure 3 is the structure diagram of the isolation shaping pipe described in embodiment one;

[0041] Figure 4 is the structure diagram of the buffer exhaust assembly described in embodiment one;

[0042] Figure 5 is the structure diagram of the buffer exhaust assembly in the exhaust state described in embodiment one;

[0043] Figure 6 is the structure diagram of the buffer exhaust assembly in the buffer pressure state described in embodiment one;

[0044] Figure 7 is the internal structure diagram of the constant-temperature and constant-pressure solution collection device described in embodiment two;

[0045] Figure 8 is the structure diagram of the outlet end pipe described in embodiment two;

[0046] Figure 9 is the structure diagram of the buffer exhaust assembly described in embodiment two;

[0047] Figure 10 is the structure diagram of the micro rib described in embodiment three.

[0048] In the figure: 1, constant-temperature oven; 11, cavity; 12, heat preservation layer; 13, temperature sensor; 2, liquid heat exchange medium; 3, heating assembly; 31, electric heating pipe; 4, refrigeration assembly; 41, evaporation pipe; 42, compressor; 43, capillary; 44, condensation pipe; 5, delivery pipe body; 51, isolation shaping pipe; 511, vapor deposition graphene layer; 512, heat-conducting metal layer; 52, flexible pipe; 53, inlet end; 54, outlet end; 55, micro rib; 6, buoyancy ball; 7, buffer exhaust assembly; 71, cylinder body; 711, buffer cavity; 712, air-permeable cavity; 713, connecting port; 714, air-permeable port; 72, piston plate; 721, air-permeable hole; 73, elastic member; 74, partition plate; 75, conical guide surface; 8, back pressure valve; 9, bidirectional metering pump; 10, proximity sensor. DETAILED DESCRIPTION

[0049] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. Embodiment one

[0050] With reference to Figures 1-2 The embodiments of the present application disclose a constant-temperature and constant-pressure solution collecting device, which comprises:

[0051] A thermostat 1, which has a cavity 11 for containing a liquid heat exchange medium 2;

[0052] A thermostat assembly, which is used for keeping the liquid heat exchange medium 2 in the cavity 11 within a set temperature range;

[0053] A delivery pipe body 5, which is immersed in the liquid heat exchange medium 2 and is used for leading a detection solution into a set container, and comprises an isolation plastic pipe 51 and a flexible pipe 52 arranged in a pipe cavity of the isolation plastic pipe 51;

[0054] A buoyancy ball 6, which is slidingly connected in the flexible pipe 52 and can abut against a top surface of the detection liquid during the process of the delivery pipe body 5 delivering the detection liquid, so as to cut off the contact with the outside atmosphere;

[0055] A buffer air exhaust assembly 7, which is arranged at a top portion of the delivery pipe body 5 and can exhaust air in a pipe cavity of the delivery pipe body 5, which is located at an upper end of the buoyancy ball 6, during the process of the delivery pipe body 5 delivering the detection liquid, and can apply an elastic supporting force to the buoyancy ball 6 after the air in the pipe cavity of the delivery pipe body 5 is exhausted, so as to form a seal at the top portion of the delivery pipe body 5 and buffer the pressure wave of the detection liquid in the delivery pipe body 5;

[0056] A back pressure valve 8, which is arranged on the delivery pipe body 5 and is close to an outlet end 54 of the buffer air exhaust assembly 7, and is used for promoting the detection solution to be delivered into the set container at a set pressure;

[0057] A bidirectional metering pump 9, which is arranged at an inlet end 53 of the delivery pipe body 5, can provide a delivery power for the detection solution and drive the buoyancy ball 6 to move upward to exhaust the air in the delivery pipe body 5 from the buffer air exhaust assembly 7 when the bidirectional metering pump 9 outputs in a forward direction, and can form a negative pressure in the delivery pipe body 5 and drive the buoyancy ball 6 to move upward to exhaust the air in the delivery pipe body 5 from the pump outlet when the bidirectional metering pump 9 outputs in a reverse direction.

[0058] Specifically, with reference to Figures 1-2, the thermostat 1 has a cavity 11 for containing the liquid heat exchange medium 2, wherein the thermostat 1 can be made of metal materials such as stainless steel, which has good corrosion resistance and thermal conductivity, or high-strength plastic materials, which are light in quality and relatively low in cost; the shape of the thermostat 1 can be square, circular, etc., and the square thermostat 1 is convenient to install and place, and the circular thermostat 1 can be more advantageous in space utilization; the outer wall of the cavity 11 is covered with a heat preservation layer 12, which can be made of polyurethane foam material, which has good heat preservation performance and can effectively reduce heat loss, or glass fiber cotton, which has the characteristics of high temperature resistance and non-combustion; the heat preservation layer 12 is fixed on the outer wall of the cavity 11 by pasting or wrapping, which can reduce the influence of the external environment on the temperature inside the cavity 11 and ensure the temperature stability of the liquid heat exchange medium 2.

[0059] With reference to Figure 1 , the thermostat assembly is used to drive the liquid heat exchange medium 2 in the cavity 11 to remain within a set temperature range; the thermostat assembly includes a heating assembly 3, a refrigeration assembly 4 and a temperature sensor 13; the heating assembly 3 is used to provide heat for the liquid heat exchange medium 2 to raise the temperature of the liquid heat exchange medium 2, and the heating assembly 3 includes an electric heating pipe 31 immersed in the liquid heat exchange medium 2, which can be columnar or in a spiral shape, which can increase the contact area with the liquid heat exchange medium 2 and improve the heating efficiency; the refrigeration assembly 4 is used to absorb the heat of the liquid heat exchange medium 2 to lower the temperature of the liquid heat exchange medium 2, and as a mature technology, the refrigeration assembly 4 includes a compressor 42, an evaporation pipe 41, a capillary tube 43 and a condensation pipe 44, wherein the evaporation pipe 41 is immersed in the liquid heat exchange medium 2 and located at the upper end of the electric heating pipe 31, so that the liquid heat exchange medium 2 can uniformly exchange heat; the temperature sensor 13 is installed on the side wall of the thermostat 1 body and is used to sense the temperature of the liquid heat exchange medium 2 in real time, and the temperature sensor 13 can be a thermocouple sensor, which has high measurement accuracy and fast response speed; the temperature sensor 13 can also be a thermistor sensor, which has low cost; the heating assembly 3, the refrigeration assembly 4 and the temperature sensor 13 are electrically connected with the control unit of the device, and the control unit adjusts the working state of the heating assembly 3 or the refrigeration assembly 4 according to the temperature value fed back by the temperature sensor 13 to make the liquid heat exchange medium 2 stay within the set temperature range. In this way, the temperature of the liquid heat exchange medium 2 can be accurately controlled to provide a stable temperature environment for the detection solution in the delivery pipe body 5.

[0060] With reference to Figure 1A back pressure valve 8 is arranged on the delivery pipe body 5 near the outlet end 54 of the buffer exhaust assembly 7, for promoting the delivery of the detection solution to the designated container at a set pressure, wherein the back pressure valve 8 can be a pilot operated back pressure valve 8 with high pressure control accuracy, or a direct operated back pressure valve 8 with simple structure and low cost; the back pressure valve 8 controls the outlet pressure of the solution by adjusting the pre-tightening force of the spring, to ensure the stable delivery of the solution at a stable pressure.

[0061] With reference to Figure 1 A bidirectional metering pump 9 is arranged at the inlet end 53 of the delivery pipe body 5, which can be a gear pump with good sealing property and suitable for delivering various corrosive solutions, and can deliver in both forward and reverse directions; the bidirectional metering pump 9 is driven by a motor, which can be a stepper motor capable of accurately controlling the flow rate of the pump; when the bidirectional metering pump 9 outputs in the forward direction, it can provide the delivery power for the detection solution and drive the buoyant ball 6 to move upward, to exhaust the air in the delivery pipe body 5 from the buffer exhaust assembly 7; when the bidirectional metering pump 9 outputs in the reverse direction, it can drive the buoyant ball 6 to move downward, to exhaust the air in the delivery pipe body 5 from the pump outlet.

[0062] It should be noted that, with reference to Figure 1 The inlet end 53 of the delivery pipe body 5 is provided with a non-contact proximity sensor 10 for sensing the position of the buoyant ball 6, and the bidirectional metering pump 9 and the proximity sensor 10 are electrically connected to the control unit of the device, so that when the proximity sensor 10 senses the buoyant ball 6, the control unit closes the bidirectional metering pump 9, wherein the proximity sensor 10 can be an ultrasonic proximity sensor 10 as a mature existing technology.

[0063] With reference to Figures 2-3 The delivery pipe body 5 is immersed in the liquid heat exchange medium 2 for draining the detection solution into the designated container, and includes an isolation shaped pipe 51 and a flexible pipe 52 arranged in the lumen of the isolation shaped pipe 51; wherein the isolation shaped pipe 51 includes, from inside to outside, a vapor-deposited graphene layer 511 and a heat-conductive metal layer 512; the vapor-deposited graphene layer has good heat conductivity and chemical stability, which can ensure the uniform temperature of the detection solution and prevent the influence of external chemical substances; the metal organic framework layer has a porous structure, which can filter and adsorb impurities in the detection solution; and the carbon fiber reinforced layer provides sufficient strength and rigidity to ensure the shape stability of the delivery pipe body 5.

[0064] With reference to Figures 2-3The flexible pipe 52 is made of rubber material, and the inner wall is coated with a hydrophilic coating. The rubber material has good flexibility and can adapt to different installation environments. The hydrophilic coating is usually made of polymer materials containing hydrophilic groups, such as polyvinyl alcohol, which can make the detection solution flow more smoothly in the flexible pipe 52 and reduce the friction between the detection solution and the buoy ball 6.

[0065] With reference to Figures 2-3 The conveying pipe body 5 has a spiral structure, and is vertically arranged in the cavity 11. The spiral structure can increase the contact area between the conveying pipe body 5 and the liquid heat exchange medium 2, thereby improving the heat exchange efficiency. The vertical arrangement is conducive to the natural flow of the solution and the sliding of the buoy ball 6.

[0066] With reference to Figures 2-3 The buoy ball 6 is slidingly connected in the flexible pipe 52 and can abut against the top surface of the detection liquid during the conveying of the detection liquid by the conveying pipe body 5, thereby cutting off the contact with the air in the conveying pipe body 5. The buoy ball 6 can be a hollow stainless steel ball with a certain weight, which is not easy to be blown by the wind and can float on the solution. The surface of the buoy ball 6 is polished to reduce the friction with the inner wall of the flexible pipe 52 and ensure smooth sliding in the flexible pipe 52.

[0067] With reference to Figure 4 The buffer exhaust assembly 7 includes a cylinder body 71, and a receiving cavity is formed in the middle of the cylinder body 71. The cylinder body 71 can be made by splicing two housings. The cylinder body 71 can be made of aluminum alloy, which is light in weight and high in strength. Alternatively, the cylinder body 71 can be made of engineering plastic, which has good corrosion resistance. The bottom of the receiving cavity is provided with a connecting port 713 for communicating with the conveying pipe body 5. The connecting port 713 can be fixed on the isolation shaped pipe 51 by screwing, and a rubber sealing gasket can be arranged on the matching surface of the connecting port 713 and the isolation shaped pipe 51 to ensure the air tightness of the assembly part. The top of the receiving cavity is provided with a gas permeation port 714 for communicating with the outside atmosphere, and a piston plate 72 is slidingly connected in the receiving cavity. The piston plate 72 can be circular and matched with the shape of the receiving cavity. The piston plate 72 is provided with a gas permeation hole 721 for communicating with the outside atmosphere. The gas permeation hole 721 can be a circular small hole and uniformly distributed on the piston plate 72. The buoy ball 6 is placed in the gas permeation cavity 712, and a gas permeation space is formed between the buoy ball 6 and the gas permeation cavity 712. The diameter of the buoy ball 6 is matched with the inner diameter of the flexible pipe 52, so that the buoy ball 6 can slide in the lumen of the flexible pipe 52. The lower end of the piston plate 72 and the bottom end of the gas permeation cavity 712 are both provided with a tapered guide surface 75, which can guide the buoy ball 6 to accurately enter the gas permeation cavity 712 and ensure the sealing effect. The buffer cavity 711 is provided with an elastic member 73 for providing elastic support force to the piston plate 72. The elastic member 73 can be a spring, and the elastic coefficient of the spring can be selected according to actual needs.

[0068] With reference to Figures 5-6, when the bidirectional metering pump 9 is outputting forward, the delivery power is provided for detecting solution to drive the detecting solution to flow in the delivery pipe body 5, and the buoyancy ball 6 moves upward with the rising of the detecting solution; since the air-permeable space is formed between the buoyancy ball 6 and the air-permeable cavity 712, a little air in the lumen of the delivery pipe body 5 can be discharged to the outside atmosphere through the air-permeable space, the air-permeable hole 721 on the piston plate 72 and the air-permeable port 714 on the top of the cylinder body 71; this process ensures that the air in the delivery pipe body 5 can be quickly and smoothly discharged, greatly reduces the interference of air to the delivery of the detecting solution, makes the detecting solution flow more smoothly, reduces the metering loss when the air in the pipeline is discharged by the detecting solution, improves the detection efficiency; with the continuous delivery of the detecting solution, the buoyancy ball 6 moves upward until abutting against the piston plate 72; at this time, the elastic member 73 in the buffer cavity 711 begins to play a role; the elastic member 73 provides elastic support force for the piston plate 72, and when the buoyancy ball 6 abuts against the piston plate 72, the elastic member 73 will deform; this elastic support force enables the piston plate 72 to exert a reaction force on the buoyancy ball 6, thereby forming a seal at the top of the delivery pipe body 5; this sealing effect prevents external air from entering the delivery pipe body 5 again, ensuring the stability of the delivery environment of the detecting solution; during the delivery of the detecting solution, due to the influence of the metering pump and the detecting solution itself, pressure waves will be formed, which will affect the stability of the dissolved gas in the solution; when the pressure wave is transmitted to the top of the delivery pipe body 5, the buffer exhaust assembly 7 can play a buffering role; the pressure wave pushes the buoyancy ball 6 to press the piston plate 72 upward, and the piston plate 72 will have a certain buffer displacement under the action of the elastic member 73; the elastic deformation of the elastic member 73 can absorb the energy of the pressure wave, disperses and weakens the impact force of the pressure wave, thereby buffering the pressure wave of the detecting liquid in the delivery pipe body 5; this helps to protect the entire delivery system, makes the delivery of the detecting liquid more stable, improves the stability of the dissolved gas in the detecting liquid, ensures the authenticity of the detection data, at the same time, also reduces the damage of the pressure wave to the components such as the delivery pipe body 5 and the back pressure valve 8, prolongs the service life of the device; in addition, the structure design of the buffer exhaust assembly 7 enables the device to automatically adjust the internal pressure and air discharge during the working process; it should be noted that the flexible pipe also has a certain buffering effect on the pressure wave; when the bidirectional metering pump 9 is outputting reversely, the detecting solution flows back, and the buoyancy ball 6 moves downward; at this time, the air in the delivery pipe body 5 will be discharged from the pump port; and the buffer exhaust assembly 7 can still maintain the integrity and functionality of its structure, and be ready for the next forward delivery of the detecting solution.The implementation principle of the present embodiment is that the constant-temperature constant-pressure solution collecting device guarantees the temperature stability of the liquid heat exchange medium 2 through the thermostat 1 and the thermostat assembly, so that the detection solution in the delivery pipe body 5 is in a constant-temperature environment; the buoyancy ball 6 reduces the contact of the detection liquid with the atmosphere, greatly reducing the problems of solution oxidation, volatilization and the like; the buffer exhaust assembly 7 exhausts air and buffers pressure waves, the back pressure valve 8 controls the solution delivery pressure, and the bidirectional metering pump 9 provides delivery power; these components cooperate with each other, effectively solving the problems of temperature instability, air contact and pressure fluctuation in the solution collecting process in the prior art, improving the accuracy and stability of solution collection, and making a significant improvement and contribution to the prior art. Embodiment Two

[0069] With reference to Figures 7-9 The difference between the present embodiment and embodiment one is that the outlet end 54 pipeline is arranged obliquely downward near the pipe section of the delivery pipe body 5. This design can utilize the gravity effect of the liquid to squeeze a small amount of air in the outlet end 54 pipeline to above the detection solution, and finally exhaust the air to the atmosphere through the buffer exhaust assembly 7; a plurality of partition plates 74 are slidingly connected in the buffer cavity 711, the partition plates 74 divide the buffer cavity 711 into a plurality of unit cavities in communication with each other, an elastic member 73 is arranged in each unit cavity, and the elastic coefficient of the elastic member 73 near one end of the buoyancy ball 6 is less than that of the elastic member 73 away from the buoyancy ball 6.

[0070] The implementation principle of the present embodiment is that in the process of delivering the detection liquid by the delivery pipe body 5, the buffer exhaust assembly 7 can exhaust the air in the lumen of the delivery pipe body 5 above the buoyancy ball 6, and after the air is exhausted, an elastic support force is applied to the buoyancy ball 6, a seal is formed at the top of the delivery pipe body 5 and the pressure wave of the detection liquid is buffered; a plurality of partition plates 74 are arranged in the buffer cavity 711 to divide it into a plurality of unit cavities, an elastic member 73 is arranged in each unit cavity, and the elastic coefficient of the elastic member 73 near one end of the buoyancy ball 6 is less than that of the elastic member 73 away from the buoyancy ball 6, which can provide different degrees of elastic support force according to the different positions of the buoyancy ball 6, better buffer different degrees of pressure wave, improve the sealing effect and buffering performance, so that the detection solution can be delivered to the specified container at a stable pressure. Embodiment Three

[0071] With reference to Figure 10The difference between the embodiment and the embodiment one is that the inner wall of the flexible pipe 52 is uniformly distributed with a plurality of "V" structure micro-ribs 55, the micro-ribs 55 can reduce the resistance of liquid flow and improve the efficiency of solution delivery, wherein the rib height of the micro-rib 55 is h, the rib spacing is s, the aspect ratio δ = h / s, δ is between 0.2-0.5, and the micro-rib 55 is arranged along the spiral angle direction of the delivery pipe body 5, to further ensure the stability of the physical and chemical properties of the detection solution, and improve the synergy of the delivery pipe body 5 and the micro-rib 55, and the spiral angle of the delivery pipe body 5 is set to be between 15°-30°, which can realize 7%-10% turbulence drag reduction, and the Reynolds stress of the turbulent boundary layer is reduced by 15%-20%; as a preferred option, the rib height of the micro-rib 55 is h = 50μm, the rib spacing is s = 200μm, and the aspect ratio δ = h / s = 0.25, forming a bionic sharkskin micro-rib.

[0072] The implementation principle of the embodiment is that the bionic sharkskin micro-rib 55 can reduce the resistance of the detection solution flowing in the flexible pipe 52, dissipate the turbulent energy into laminar flow, improve the solution delivery efficiency, and reduce the numerical fluctuation of the dissolved gas content in the detection solution caused by turbulence, further improve the authenticity of the detection value, and specifically, the "ridge-valley" structure of the micro-rib 55 will destroy the hairpin vortex in the turbulent boundary layer, prevent it from merging into a large-scale vortex, and thus inhibit the turbulent pulsation; and the reverse secondary vortex generated at the top of the micro-rib 55 will interact with the main stream turbulent vortex, converting the turbulent kinetic energy into viscous dissipation.

[0073] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application.

Claims

1. A constant temperature and constant pressure solution collection device, characterized in that, include: The constant temperature chamber (1) has a cavity (11) for holding liquid heat exchange medium (2). Thermostatic assembly is used to keep the liquid heat exchange medium (2) in the cavity (11) within a set temperature range; The delivery tube (5) is immersed in the liquid heat exchange medium (2) and is used to guide the test solution to the set container, including the isolation plastic tube (51) and the flexible tube (52) in the cavity of the built-in isolation plastic tube (51). The buoyancy ball (6) is slidably connected in the flexible tube (52) and can come into contact with the top surface of the test liquid during the process of transporting the test liquid in the transport tube (5), thus isolating it from contact with the outside atmosphere. The buffer exhaust assembly (7) is located at the top of the delivery pipe (5). It can exhaust the air located above the buoyancy ball (6) in the cavity of the delivery pipe (5) during the delivery of the test liquid. After exhausting the air in the cavity of the delivery pipe (5), it can apply an elastic support force to the buoyancy ball (6) to form a seal at the top of the delivery pipe (5) and buffer the pressure wave of the test liquid in the delivery pipe (5). The buffer exhaust assembly (7) includes a cylinder (71), and a receiving cavity is formed in the middle of the cylinder (71). The bottom of the receiving cavity is provided with a connection port (713) for connecting to the delivery pipe (5), and the top is provided with a connection port to the outside. A vent (714) is connected to the air, and a piston plate (72) is slidably connected in the receiving cavity; the piston plate (72) divides the receiving cavity into a buffer cavity (711) and a vent (712) from top to bottom, and the piston plate (72) is provided with a vent hole (721); the buoyancy ball (6) can enter the vent (712), and a ventilated space is formed between the buoyancy ball (6) and the vent (712); the diameter of the buoyancy ball (6) is adapted to the inner diameter of the flexible tube (52), and it can slide in the cavity of the flexible tube (52); the buffer cavity (711) is provided with an elastic element (73) that provides elastic support for the piston plate (72). Back pressure valve (8) is located on the side wall of the delivery pipe (5) near the outlet end (54) of the buffer exhaust assembly (7) to facilitate the delivery of the detection solution to the designated container at a set pressure; A bidirectional metering pump (9) is installed at the inlet end (53) of the delivery pipe (5). When outputting in the positive direction, it can provide positive delivery power for the test solution and drive the buoyancy ball (6) to move upward so as to discharge the air in the delivery pipe (5) from the buffer exhaust assembly (7). When outputting in the reverse direction, it can form a negative pressure in the delivery pipe (5) and drive the buoyancy ball (6) to move downward so as to discharge the air in the delivery pipe (5) from the pump port.

2. The isothermal and constant-pressure solution collection device according to claim 1, characterized in that, The insulating shaped tube (51) consists of a vapor-deposited graphene layer (511) and a thermally conductive metal layer (512) from the inside out.

3. The isothermal and constant-pressure solution collection device according to claim 1, characterized in that, The flexible tube (52) is made of rubber and the inner wall of the flexible tube (52) is coated with a hydrophilic coating; the outer wall of the cavity (11) is covered with a heat insulation layer (12).

4. The isothermal and constant-pressure solution collection device according to claim 1, characterized in that, The flexible tube (52) is evenly distributed with several microribs (55) in the shape of "V".

5. The isothermal and constant-pressure solution collection device according to claim 4, characterized in that, The conveying tube (5) has a spiral structure and is vertically arranged in the cavity (11); the microribs (55) are arranged along the spiral angle direction of the conveying tube (5).

6. The isothermal and constant-pressure solution collection device according to claim 1, characterized in that, The lower end of the piston plate (72) and the bottom end of the vent cavity (712) are both provided with a tapered guide surface (75).

7. The isothermal and constant-pressure solution collection device according to claim 1, characterized in that, The buffer cavity (711) is slidably connected with several partition plates (74), which divide the buffer cavity (711) into several interconnected unit cavities. Each unit cavity is provided with an elastic element (73), and the elastic coefficient of the elastic element (73) near the buoyancy ball (6) is smaller than that of the elastic element (73) away from the buoyancy ball (6).

8. The isothermal and constant-pressure solution collection device according to claim 1, characterized in that, The thermostatic assembly includes a heating assembly (3), a cooling assembly (4), and a temperature sensor (13). The heating assembly (3) provides heat to the liquid heat exchange medium (2), causing the temperature of the liquid heat exchange medium (2) to rise. The cooling assembly (4) absorbs the heat from the liquid heat exchange medium (2), causing the temperature of the liquid heat exchange medium (2) to drop. The temperature sensor (13) senses the temperature of the liquid heat exchange medium (2) in real time. The heating assembly (3), the cooling assembly (4), and the temperature sensor (13) are electrically connected to the control unit of the device. The control unit adjusts the working state of the heating assembly (3) or the cooling assembly (4) according to the temperature value fed back by the temperature sensor (13), so that the liquid heat exchange medium (2) is within the set temperature range.

9. The isothermal and constant-pressure solution collection device according to claim 8, characterized in that, The heating assembly (3) includes an electric heating tube (31) immersed in a liquid heat exchange medium (2), and the electric heating tube (31) is electrically connected to the control unit; the refrigeration assembly (4) includes a compressor (42) and an evaporator (41); the electric heating tube (31) is immersed at the bottom of the liquid heat exchange medium (2); the evaporator (41) is immersed in the liquid heat exchange medium (2) and is located at the upper end of the electric heating tube (31).

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