Wireless temperature calibration device for pressurized fluid extractor

Abstract

The utility model relates to the technical field of equipment calibration, in particular to a wireless temperature calibration device for a pressurized fluid extraction instrument, which can acquire and store temperature data in the pressurized fluid extraction instrument through a small-volume integrated packaging design. The top of the upper cover unit arranged on the outer shell unit and the bottom of the lower shell unit are each of an arc structure, and the lower shell is made of thickened PEEK, so that the pressure bearing capacity of the device is enhanced; a sealing unit is arranged, that is, sealant is arranged at the matched connection position of a connecting thread and a center threaded hole and the matched connection position of a gland internal thread and a port external thread, a sealing ring is installed in a gap between the top of an upper cover unit and the connection position of a lower shell unit in an attached and sealed mode, and the gap of a lower cavity is filled with pouring sealant on the periphery of an electronic unit. The sealing reliability of the calibration device is ensured, the electronic unit is prevented from being damaged, the use reliability of the calibration device is improved, and the service life is prolonged; and a collection circuit board, a battery module and a transmitting circuit board are arranged in the electronic unit, so that wireless connection and control of a computer are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment calibration, in particular to a wireless temperature calibration device for a pressurized fluid extractor. Background Art

[0002] The Pressurized Fluid Extractor (PFE) is an automated sample pretreatment instrument that increases the solubility and diffusion rate of solutes by increasing temperature and pressure, thereby achieving efficient extraction steps. It uses the physical environment of high pressure to increase the boiling point of the solvent. By increasing the temperature, it can increase the diffusion force, improve the solubility, reduce the viscosity and surface tension, and reduce the physical / chemical binding force, so that the extraction time is reduced from more than ten hours of Soxhlet extraction to 15~30 minutes, and the solvent consumption is reduced from the original 200mL to 20~50mL, greatly improving the extraction efficiency and reducing the extraction cost.

[0003] The common working temperature of the pressurized fluid extractor is (0-150)℃, and the working pressure is often 10 MPa. At the same time, the volume of the extraction cell is only about 40mL. At present, some wireless temperature and pressure measuring probes at home and abroad are used for high-pressure steam sterilizers and pulsating vacuum sterilizers in hospital disinfection supply centers, but the applicable temperature is 140℃, the maximum pressure is 2MPa, the volume is large, and the probe size is larger than the extraction cell of the pressurized fluid extractor, making it difficult to insert.

[0004] Therefore, there is an urgent need for a small-volume wireless calibration device that is integrated to meet the needs of a pressurized fluid extractor, can work stably and reliably under a pressure of 10 MPa, can measure temperatures between (0 and 150) °C, and has internal components that are not deformed or damaged. Utility Model Content

[0005] The utility model discloses a wireless temperature calibration device for a pressurized fluid extractor, aiming to solve the technical problems existing in the prior art.

[0006] The utility model adopts the following technical solutions:

[0007] The wireless temperature calibration device for a pressurized fluid extractor is an integrated package design and is used to be placed in an extraction tank of the pressurized fluid extractor, comprising an outer shell unit, a probe unit packaged at the upper end of the outer shell unit and with a temperature probe exposed at the top, and an electronic unit packaged at the lower end of the outer shell unit;

[0008] The outer shell unit includes an upper cover unit and a lower shell unit fixedly connected as one body, and the top end of the upper cover unit and the bottom end of the lower shell unit are both set as arc structures; wherein, the upper cover unit includes a pressure cover fixedly connected to the cylindrical side wall of the lower shell unit and a top cover embedded in the top end of the pressure cover, and the top cover is fixedly connected to the temperature probe passing through it as one body; the electronic unit includes an electrically connected battery module and a circuit board, which are encapsulated in a cavity provided in the lower shell unit.

[0009] In some embodiments, the lower shell unit made of PEEK material includes a lower shell and a lower chamber inside, the lower shell includes a cylindrical side wall and an arc bottom wall, the upper end of the cylindrical side wall is provided with a port external thread, and the wall thickness S of the lower shell should satisfy: 2.8mm≤S≤3.5mm; the pressure cover includes a pressure cover barrel body with an upper cavity inside and a top arc wall located at the top of the pressure cover barrel body, the top arc wall is provided with an upper center through hole matching and fitting with the top cover, and the lower end of the pressure cover barrel body is provided with a pressure cover internal thread matching and connected with the port external thread.

[0010] In some embodiments, the top cover is provided with an upper cylinder, a large cylinder and a small cylinder from top to bottom, the top of the upper cylinder is provided with an arc top, the top cover is installed in the upper cavity, and when the upper cylinder is matched and fitted with the upper center through hole, the arc top and the top arc wall are merged into the same arc, a center threaded hole is provided on the arc top, and the small cylinder is provided with a frustum cavity opening at the bottom end.

[0011] In some embodiments, the frustum cavity is connected to the lower chamber, and the outer wall of the small cylinder, the bottom wall of the large cylinder, the top of the cylindrical side wall and the inner wall of the gland barrel form a gap for tightly fitting the sealing ring.

[0012] In some embodiments, the probe unit includes a metal base and a temperature probe vertically fixed on the metal base, the metal base fits well with the frustum cavity, a connecting thread is provided at the lower end of the outer diameter of the temperature probe, and the connecting thread is matched and connected with the center threaded hole.

[0013] In some embodiments, the temperature probe is configured as a metal armor, a sensor is disposed inside the top metal outer layer, and the sensor is connected to the electronic unit via a flexible wire.

[0014] In some embodiments, sealant is provided at the matching connection between the connecting thread and the central threaded hole, and at the matching connection between the inner thread of the gland and the outer thread of the port.

[0015] In some embodiments, the electronic unit includes an acquisition circuit board, a battery module and a transmitting circuit board which are connected from top to bottom in sequence through the flexible wire; the acquisition circuit board is electrically connected to the sensor, the battery module is configured as a high temperature resistant battery, and the transmitting circuit board is connected to the computer via a wireless communication module.

[0016] In some embodiments, the gaps in the lower chamber around the electronic unit are filled with potting glue.

[0017] In some embodiments, the wireless temperature calibration device is configured as a small-volume column, and the overall height H should satisfy: 25 mm < H < 47.5 mm.

[0018] Beneficial Effects

[0019] The utility model discloses a wireless temperature calibration device for a pressurized fluid extractor. Compared with the prior art, the utility model has the following advantages:

[0020] The wireless temperature calibration device for pressurized fluid extractor can meet the demand of temperature measurement when placed in a 40mL extraction pool through an integrated small-volume packaging design; the outer shell unit includes an upper cover unit and a lower shell unit that are fixedly connected as one, the top of the upper cover unit and the bottom of the lower shell unit are both set as arc structures and the lower shell is thickened PEEK, which enhances the pressure-bearing capacity of the device; the upper cover unit is provided with a gland and a top cover embedded in the top of the gland, the lower end of the gland barrel is provided with a gland internal thread and the lower shell is provided with a cylindrical side wall The port external thread is matched and connected, and the center threaded hole provided on the top cover is connected with the connecting thread provided at the lower end of the outer diameter of the temperature probe Matching connections, and matching connections are all provided with sealants; the gap formed by the outer wall of the small cylinder provided on the top cover, the bottom wall of the large cylinder, the inner wall of the pressure cover barrel and the top of the cylindrical side wall provided on the lower shell unit is tightly fitted with a sealing ring, that is, a multi-layer sealing design is used to achieve a good sealing effect; the gap in the lower chamber outside the electronic unit is filled with potting glue, which further ensures that the overall structure will not be deformed or liquid will not enter under a pressure of 10MPa, the electronic unit will not be damaged, and the service life of the device is extended; the electronic unit is provided with an acquisition circuit board, a battery module and a transmitting circuit board to achieve wireless control connection by a computer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for the description of the embodiment, which constitute a part of the utility model. The schematic embodiments of the utility model and their descriptions explain the utility model and do not constitute an improper limitation on the utility model; in the drawings:

[0022] Figure 1A schematic diagram of the technical solution structure of the wireless temperature calibration device provided by the embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the technical solution structure of the gland;

[0024] Figure 3 It is a schematic diagram of the technical solution structure of the top cover;

[0025] Figure 4 It is a structural block diagram of the technical solution of the electronic unit.

[0026] In the figure:

[0027] Outer shell unit 1; upper cover unit 11; gland 111; gland barrel 1111; top arc wall 1112; upper center through hole 1113; upper cavity 1114; gland internal thread 1115; inclined inner wall 1116; top cover 112; arc top 1121; upper cylinder 1122; large cylinder 1123; small cylinder 1124; center threaded hole 1126; inclined outer wall 1125; frustum cavity 1127; lower shell unit 12; lower shell 121; port external thread 1211; cylindrical side wall 1 212; arc bottom wall 1213; lower chamber 122; gap 13; probe unit 2; temperature probe 21; sensor 211; metal outer layer 212; connecting thread 213; metal base 22; electronic unit 3; battery module 31; acquisition circuit board 32; single chip computer 321; memory 322; AD circuit 323; transmitting circuit board 33; wireless communication module 331; Hall module 332; sealing unit 4; sealant 41; sealing ring 42; potting glue 43; flexible wire 5; computer 6. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings; in the description of the utility model, it should be noted that the "including" mentioned in the specification and the claims is an open term, so it should be interpreted as "including but not limited to"; "several" refers to more than 3.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0030] Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] like Figure 1-Figure 4 As shown, the technical solution disclosed by the utility model is:

[0032] A wireless temperature calibration device for a pressurized fluid extractor is an integrated packaging design and is used to be placed in an extraction tank of the pressurized fluid extractor. It includes an outer shell unit 1, a probe unit 2 packaged at the upper end of the outer shell unit 1 and with a temperature probe 21 exposed at the top, and an electronic unit 3 packaged at the lower end of the outer shell unit 1.

[0033] The outer shell unit 1 includes an upper cover unit 11 and a lower shell unit 12 fixedly connected as one body, and the top end of the upper cover unit 11 and the bottom end of the lower shell unit 12 are both set as arc structures; wherein, the upper cover unit 11 includes a pressure cover 111 fixedly connected to a cylindrical side wall 1212 provided on the lower shell unit 12 and a top cover 112 embedded in the top end of the pressure cover 111, and the top cover 112 is fixedly connected to the temperature probe 21 passing through it as one body.

[0034] The electronic unit 3 includes a battery module 31 , a collection circuit board 32 , and a transmission circuit board 33 connected by a flexible wire 5 , and is packaged in a lower chamber 122 provided in the lower housing unit 12 .

[0035] like Figure 1-Figure 4 As shown, the preferred embodiment disclosed by the utility model is:

[0036] A wireless temperature calibration device for a pressurized fluid extractor is an integrated packaging design and is used to be placed in an extraction tank of the pressurized fluid extractor. It includes an outer shell unit 1, a probe unit 2 packaged at the upper end of the outer shell unit 1 and with a temperature probe 21 exposed at the top, and an electronic unit 3 packaged at the lower end of the outer shell unit 1.

[0037] The outer shell unit 1 includes an upper cover unit 11 and a lower shell unit 12 fixedly connected as one body, and the top end of the upper cover unit 11 and the bottom end of the lower shell unit 12 are both set as arc structures; wherein, the upper cover unit 11 includes a pressure cover 111 fixedly connected to a cylindrical side wall 1212 provided on the lower shell unit 12 and a top cover 112 embedded in the top end of the pressure cover 111, and the top cover 112 is fixedly connected to the temperature probe 21 passing through it as one body.

[0038] In this embodiment, the lower shell unit 12 includes a lower shell 121 and an internal lower chamber 122. The lower shell 121 includes a cylindrical side wall 1212 and an arc bottom wall 1213. The upper end of the cylindrical side wall 1212 is provided with a port external thread 1211, and the lower shell 121 is set to PEEK material. The wall of the lower shell 121 is set to be a thick wall, and the wall thickness S should satisfy: 2.8mm≤S≤3.5mm, and the best setting is 2.85mm. The thick wall setting enhances the pressure resistance function.

[0039] The gland 111 includes a gland barrel body 1111 and a top arc wall 1112 located at the top of the gland barrel body 1111. The lower end of the gland barrel body 1111 is provided with a gland internal thread 1115, and an upper cavity 1114 is provided inside. An upper center through hole 1113 is provided on the top arc wall 1112, and the center through hole 1113 matches and fits with the top cover 112. An inclined inner wall 1116 is provided on the upper part of the inner wall side of the gland barrel body 1111.

[0040] In this embodiment, the top cover 112 is provided with an upper cylinder 1122, a large cylinder 1123 and a small cylinder 1124 from top to bottom, and the top of the upper cylinder 1122 is provided with an arc top 1121. The top cover 112 is installed in the upper cavity 1114, and when the upper cylinder 1122 is matched and fitted with the upper center through hole 1113, the arc top 1121 and the top arc wall 1112 are fused into the same circle. The arc top 1121 is provided with a central threaded hole 1126, the small cylinder 1124 is provided with a frustum cavity 1127 opening at the bottom end, the large cylinder 1123 is provided with an inclined outer wall 1125 on the upper part of the outer wall side, and the gap with the inclined inner wall 1116 on the upper part of the inner wall side of the pressure cover barrel 1111 is matched, the arrangement of the inclined outer wall 1125 and the inclined inner wall 1116 is convenient for processing, and the material of the top cover 112 is set to 316 stainless steel.

[0041] In this embodiment, the frustum cavity 1127 is connected with the lower chamber 122 provided in the lower shell 121, and the outer wall of the small cylinder 1124, the bottom wall of the large cylinder 1123, the top of the cylindrical side wall 1212 and the inner wall of the gland barrel 1111 enclose a gap 13. The sealing ring 42 is tightly installed in the gap 13 to play a sealing role. The material of the sealing ring 42 is set to be polytetrafluoroethylene.

[0042] The lower shell 121 and the pressure cover 111 are both made of PEEK, which is not easy to conduct heat, is strong, and wireless communication can be transmitted; and the wireless temperature calibration device is set to a small volume column, and the overall height H should meet the following requirements: 25mm<H<47.5mm, and the optimal size is set to 47mm to meet the requirements of a 40ml extraction pool volume.

[0043] The lower shell 121 and the pressure cover 111 made of PEEK material have poor heat conductivity, which ensures that the exposed temperature probe 21 can continuously measure the temperature for 1 hour in an environment of 150°C.

[0044] The probe unit 2 includes a metal base 22 and a temperature probe 21 vertically fixed on the metal base 22. The metal base 22 matches and fits the shape of the frustum cavity 1127. A connecting thread 213 is provided at the lower end of the outer diameter of the temperature probe 21. The connecting thread 213 matches and connects with the central threaded hole 1124.

[0045] The temperature probe 21 is configured as a metal armor, and a sensor 211 is provided in a top metal outer layer 212 . The sensor 211 is connected to the electronic unit 3 via a flexible wire 5 . In this embodiment, the sensor is configured as a platinum resistance element.

[0046] The electronic unit 3 includes a battery module 31 , a collection circuit board 32 , and a transmission circuit board 33 connected by a flexible wire 5 , and is packaged in a lower chamber 122 provided in the lower housing unit 12 .

[0047] The electronic unit 3 includes a collection circuit board 32, a battery module 31 and a transmitting circuit board 33 which are connected from top to bottom in sequence through the flexible wire 5; the collection circuit board 32 is electrically connected to the sensor 211, the battery module 31 is a high temperature resistant lithium battery, and the transmitting circuit board 33 is connected to the computer 6 via a wireless communication module 331.

[0048] The acquisition circuit board 32 and the emission circuit board 33 are two circular circuit boards, which are respectively fixed on the side walls of the lower chamber 122. The positive and negative springs of the battery module 31 are left between the acquisition circuit board 32 and the emission circuit board 33 to realize power supply for the entire device.

[0049] The acquisition circuit board 32 includes a single-chip microcomputer 321 for controlling temperature acquisition, and the single-chip microcomputer 321 also includes a MAC timer module and an RF transceiver, a memory 322 and an AD circuit 323 for storing data information; the transmitting circuit board 33 includes a wireless communication module 331 connected to the computer 6 for communication and a Hall module 332 that wirelessly connects the calibration device to the computer 6 through a dedicated interface.

[0050] In this embodiment, the gaps in the lower chamber 122 outside the electronic unit 3 are filled with potting glue 43. By filling with potting glue 43, it is further ensured that the overall structure will not be deformed or infiltrated under a pressure of 10 MPa, the electronic unit will not be damaged, and the service life of the device is extended.

[0051] In this embodiment, the device is provided with a sealing unit 4, including a sealant 41, a sealing ring 42 and a potting compound 43; the connecting thread 213 and the matching connection of the center threaded hole 1124, and the matching connection of the gland internal thread 1115 and the port external thread 1211 are provided with sealant 41, the sealing ring 42 is tightly installed in the gap 13, and the gap in the lower chamber 122 is filled with potting compound 43. By providing the sealing unit 4, the sealing reliability of the device and the electronic unit 3 are ensured not to be damaged, thereby extending the reliability and service life of the device.

[0052] The calibration device is placed on a dedicated interface (not shown in the figure), and the Hall module 332 wirelessly connects the electronic unit 3 to the computer 6 through the interface. The interface is provided with a platform for placing the device, and an activator is provided inside. The activator activates the Hall module 332, that is, the interface is connected to the computer 6 software, and communication is established with the computer 6 through the wireless communication module 331, and the computer 6 reads the temperature information stored in the memory 322.

[0053] The computer 6 controls the wireless calibration device through the circuit and sets the sampling frequency. The sampling frequency can be set to collect data once per second at the fastest and once every 180 seconds at the slowest. The working time is set, such as setting the working time for 1h, 3h, 6h or customizing the start and stop time. The calibration device can store data offline and can also transmit the data to the real-time data display interface of the software in real time.

[0054] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which are within the protection of the utility model.

Claims

1. A wireless temperature calibration device for a pressurized fluid extractor, which is an integrated package design and is used to be placed in an extraction cell of the pressurized fluid extractor, characterized in that: It comprises an outer shell unit, a probe unit encapsulated at the upper end of the outer shell unit and with a temperature probe exposed at the top, and an electronic unit encapsulated at the lower end of the outer shell unit; The outer shell unit comprises an upper cover unit and a lower shell unit which are fixedly connected as one body, and the top end of the upper cover unit and the bottom end of the lower shell unit are both set as arc structures; wherein the upper cover unit comprises a gland fixedly connected to the cylindrical side wall provided on the lower shell unit and a top cover embedded in the top end of the gland, and the top cover is fixedly connected to the temperature probe passing through it as one body; The electronic unit includes an electrically connected battery module and a circuit board, which are packaged in a cavity provided in the lower housing unit.

2. The wireless temperature calibration device for pressurized fluid extraction instrument according to claim 1, characterized in that: The lower housing unit made of PEEK material includes a lower housing and a lower chamber inside, the lower housing includes a cylindrical side wall and an arc bottom wall, the upper end of the cylindrical side wall is provided with a port external thread, and the wall thickness S of the lower housing should meet: 2.8mm≤S≤3.5mm; The gland includes a gland barrel body with an upper cavity inside and a top arc wall located at the top of the gland barrel body. The top arc wall is provided with an upper center through hole matching and fitting with the top cover. The lower end of the gland barrel body is provided with a gland internal thread matching and connected with the port external thread.

3. The wireless temperature calibration device for pressurized fluid extraction instrument according to claim 2, characterized in that: The top cover is provided with an upper cylinder, a large cylinder and a small cylinder in sequence from top to bottom. The top of the upper cylinder is provided with an arc top. The top cover is installed in the upper cavity. When the upper cylinder is matched with the upper center through hole, the arc top and the top arc wall are merged into the same arc. A center threaded hole is provided on the arc top. The small cylinder is provided with a frustum cavity opening at the bottom end.

4. The wireless temperature calibration device for pressurized fluid extraction instrument according to claim 3, characterized in that: The frustum cavity is communicated with the lower chamber, and the outer wall of the small cylinder, the bottom wall of the large cylinder, the top of the cylindrical side wall and the inner wall of the gland barrel form a gap for tightly fitting and installing a sealing ring.

5. The wireless temperature calibration device for pressurized fluid extraction instrument according to claim 3, characterized in that: The probe unit includes a metal base and a temperature probe vertically fixed on the metal base. The metal base is matched and fitted with the frustum cavity. The lower end of the outer diameter of the temperature probe is provided with a connecting thread, and the connecting thread is matched and connected with the central threaded hole.

6. The wireless temperature calibration device for pressurized fluid extraction instrument according to claim 5, characterized in that: The temperature probe is provided with a metal armor, a sensor is arranged in the top metal outer layer, and the sensor is connected with the electronic unit through a flexible wire.

7. The wireless temperature calibration device for pressurized fluid extraction instrument according to claim 5, characterized in that: Sealant is provided at the matching connection between the connecting thread and the central threaded hole, and at the matching connection between the inner thread of the gland and the outer thread of the port.

8. The wireless temperature calibration device for pressurized fluid extraction instrument according to claim 6, characterized in that: The electronic unit includes a collection circuit board, a battery module and a transmitting circuit board which are connected from top to bottom in sequence through flexible wires; the collection circuit board is electrically connected to the sensor, the battery module is a high temperature resistant battery, and the transmitting circuit board is connected to the computer through a wireless communication module.

9. The wireless temperature calibration device for pressurized fluid extraction instrument according to claim 8, characterized in that: The gaps in the lower chamber outside the electronic unit are filled with potting glue.

10. The wireless temperature calibration device for pressurized fluid extraction instrument according to claim 1, characterized in that: The wireless temperature calibration device is set to a small volume column type, and the overall height H should satisfy: 25mm<H<47.5mm.

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