Micro-flow calibration device with self-calibration and traceability functions

Abstract

The utility model relates to the technical field of flow standard, in particular to a micro-flow calibration device with self-calibration and source tracing functions, which comprises a water tank, a plunger pump and a magnetic drive pump, a first water outlet and a second water outlet are respectively and fixedly mounted on the right side of the water tank, and the output ends of the plunger pump and the magnetic drive pump are both connected with a pressure and flow stabilizing device. A first pressure transmitter and a second pressure transmitter are fixedly installed at the right end of the pressure and flow stabilizing device, the right end of the first pressure transmitter is connected with a first flow meter through a pipeline, a first filling head is arranged at the right end of the first flow meter, and an electronic balance is arranged at the bottom end of the first filling head. According to the micro-flow calibration device with the self-calibration and traceability functions, by means of the structural design of the first flow meter, the second flow meter, the third flow meter, the fourth flow meter, the weighing module and the control box, the calibration purpose is achieved, and the precision and reliability of the device are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of flow standards, in particular to a micro-flow calibration device with self-calibration and traceability functions. Background Art

[0002] The micro-flow calibration device is a device for calibrating micro-flow meters. Currently, the measurement and calibration of micro-flow is still a technical problem in the industry. The fundamental reason is that the accuracy and stability of the calibration device under micro-flow conditions do not meet the requirements of the measurement standards.

[0003] A micro-flow calibration device with self-calibration and traceability functions is currently used. Most of these micro-flow calibration devices do not have automatic operability and require staff to perform auxiliary operations. This process is time-consuming and labor-intensive. In addition, the micro-flow calibration device cannot achieve self-calibration and traceability, which reduces the accuracy and reliability of the device. At the same time, most of the micro-flow calibration devices are installed in an integrated manner. This installation method makes it difficult to carry the device to the experimental site, which is not conducive to the subsequent calibration work.

[0004] In summary, the present invention solves the problems in the above-mentioned background technology by designing a micro-flow calibration device with self-calibration and traceability functions. Utility Model Content

[0005] The purpose of the utility model is to provide a micro-flow calibration device with self-calibration and traceability functions to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A micro-flow calibration device with self-calibration and traceability functions comprises a water tank, a plunger pump and a magnetic pump, wherein a constant pressure device and a temperature transmitter are respectively arranged at the inner bottom end of the water tank, a No. 1 water outlet and a No. 2 water outlet are respectively fixedly installed on the right side of the water tank, and grooves are provided at the right ends of the No. 1 water outlet and the No. 2 water outlet, respectively, and a connecting pipe is fixedly installed at the input end of the plunger pump and the magnetic pump, a convex ring is fixedly provided at the left end of the connecting pipe, a lower arc ring and an upper arc ring are respectively provided at the outer side of the connecting pipe, a locking screw is fixedly installed at the top front side of the lower arc ring, a locking butterfly cap is provided on the outer thread sleeve of the locking screw, and a voltage and current stabilizing device is connected to the output end of the plunger pump and the magnetic pump, A No. 1 pressure transmitter and a No. 2 pressure transmitter are fixedly installed on the right end of the pressure and flow stabilizing device, respectively. The right end of the No. 1 pressure transmitter is connected to a No. 1 flowmeter through a pipeline, and a No. 1 filling head is arranged on the right end of the No. 1 flowmeter. An electronic balance is arranged on the bottom end of the No. 1 filling head. The right end of the No. 2 pressure transmitter is connected to a No. 2 flowmeter through a pipeline, and an electromagnetic three-way valve is installed on the right end of the No. 2 flowmeter, and a No. 3 flowmeter is arranged on the top of the electromagnetic three-way valve, and a No. 2 filling head is installed on the top of the No. 3 flowmeter. A No. 4 flowmeter is arranged on the right end of the electromagnetic three-way valve, and a No. 3 filling head is installed on the right end of the No. 4 flowmeter, and a weighing bucket is arranged below the No. 3 filling head.

[0008] As a preferred solution of the utility model, the inner wall of the groove is in sealing contact with the outer surface of the convex ring, and the outer dimensions of the No. 1 water outlet and the No. 2 water outlet are consistent with the outer dimensions of the connecting pipe.

[0009] As a preferred solution of the utility model, the lower arc ring and the upper arc ring are rotatably connected by a pin shaft, the end of the locking screw away from the lower arc ring fits through the bottom front end surface of the upper arc ring and extends upward, and the inner surfaces of the lower arc ring and the upper arc ring are provided with a friction layer.

[0010] As a preferred solution of the utility model, the type of the plunger pump is a high-precision dual-channel piston plunger pump, and the caliber of the No. 1 flow meter is Φ1mm or Φ4mm.

[0011] As a preferred solution of the utility model, the No. 3 flow meter is installed vertically, and the No. 4 flow meter is installed horizontally. The calibers of the No. 4 flow meter and the No. 3 flow meter are Φ4mm~Φ15mm.

[0012] As a preferred solution of the utility model, a weighing module is provided at the bottom of the weighing bucket, wherein the weighing module is electrically connected to a control box at the backstage through a wire.

[0013] As a preferred solution of the utility model, the constant pressure device, temperature transmitter, plunger pump, magnetic pump, voltage and flow stabilizing device, No. 1 pressure transmitter, No. 2 pressure transmitter, No. 1 flowmeter, electronic balance, No. 2 flowmeter, electromagnetic three-way valve, No. 3 flowmeter and No. 4 flowmeter are electrically connected to the control box in the background through wires.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the utility model, a micro-flow calibration device with self-calibration and traceability functions is set up, so that the control box can collect data from each flow meter by utilizing the structural design of flow meter No. 1, flow meter No. 2, flow meter No. 3, flow meter No. 4, weighing module and control box. The weighing module can weigh the extracted water, thereby achieving the purpose of calibration and ensuring the accuracy and reliability of the device.

[0016] 2. In the utility model, a micro-flow calibration device with self-calibration and traceability functions is set up, so that the contact between the groove and the convex ring is realized by utilizing the structural design of the groove, the convex ring, the lower arc ring, the upper arc ring, the locking screw and the locking butterfly cap, so that the connecting pipe is plugged into the No. 1 water outlet and the No. 2 water outlet, and under the threaded cooperation of the locking screw and the locking butterfly cap, the lower arc ring and the upper arc ring move toward each other, thereby achieving the purpose of convenient installation of the device, facilitating the disassembly and carrying of the device, and facilitating the subsequent calibration operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of the device of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the water tank of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the weighing bucket of the utility model;

[0021] Figure 5 It is a system block diagram of the device of the utility model.

[0022] In the figure: 1. water tank; 101. constant pressure device; 102. temperature transmitter; 103. water outlet No. 1; 104. water outlet No. 2; 105. groove; 2. plunger pump; 3. magnetic pump; 4. connecting pipe; 401. convex ring; 402. lower arc ring; 403. upper arc ring; 404. locking screw; 405. locking butterfly cap; 5. voltage and flow stabilizing device; 501. pressure transmitter No. 1; 502. pressure transmitter No. 2; 503. flow meter No. 1; 504. filling head No. 1; 505. electronic balance; 6. flow meter No. 2; 7. electromagnetic three-way valve; 8. flow meter No. 3; 801. filling head No. 2; 9. flow meter No. 4; 901. filling head No. 3; 10. weighing barrel; 1001. weighing module. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of 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.

[0024] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0027] For examples, see Figure 1-5 , the utility model provides a technical solution:

[0028] A micro-flow calibration device with self-calibration and traceability functions comprises a water tank 1, a plunger pump 2 and a magnetic pump 3. A constant pressure device 101 and a temperature transmitter 102 are respectively arranged at the inner bottom of the water tank 1. A No. 1 water outlet 103 and a No. 2 water outlet 104 are respectively fixedly installed on the right side of the water tank 1. A groove 105 is provided at the right end of the No. 1 water outlet 103 and the No. 2 water outlet 104. A connecting pipe 4 is fixedly installed at the input end of the plunger pump 2 and the magnetic pump 3. A convex ring 401 is fixedly arranged at the left end of the connecting pipe 4. A lower arc ring 402 and an upper arc ring 403 are respectively arranged on the outer side of the connecting pipe 4. A locking screw 404 is fixedly installed on the top front side of the lower arc ring 402. A locking butterfly cap 405 is provided on the outer thread sleeve of the locking screw 404. The output ends of the plunger pump 2 and the magnetic pump 3 are connected to a voltage and pressure stabilizer. A flow device 5, a No. 1 pressure transmitter 501 and a No. 2 pressure transmitter 502 are fixedly installed on the right end of the pressure and flow stabilizing device 5, the right end of the No. 1 pressure transmitter 501 is connected to a No. 1 flow meter 503 through a pipeline, a No. 1 filling head 504 is arranged on the right end of the No. 1 filling head 504, an electronic balance 505 is arranged on the bottom end of the No. 1 filling head 504, the right end of the No. 2 pressure transmitter 502 is connected to a No. 2 flow meter 6 through a pipeline, an electromagnetic three-way valve 7 is installed on the right end of the No. 2 flow meter 6, a No. 3 flow meter 8 is arranged on the top of the electromagnetic three-way valve 7, a No. 2 filling head 801 is installed on the top of the No. 3 flow meter 8, a No. 4 flow meter 9 is arranged on the right end of the electromagnetic three-way valve 7, a No. 3 filling head 901 is arranged on the right end of the No. 4 flow meter 9, and a weighing barrel 10 is arranged below the No. 3 filling head 901;

[0029] Specifically, the inner wall of the groove 105 is in sealing contact with the outer surface of the convex ring 401, the outer dimensions of the No. 1 water outlet 103 and the No. 2 water outlet 104 are consistent with the outer dimensions of the connecting pipe 4, the lower arc ring 402 and the upper arc ring 403 are rotatably connected by a pin shaft, the end of the locking screw 404 away from the lower arc ring 402 is in contact with the bottom front end surface of the upper arc ring 403 and extends upward, and the inner surfaces of the lower arc ring 402 and the upper arc ring 403 are provided with a friction layer;

[0030] In the present embodiment, the groove 105 is mainly used to contact the convex ring 401, so as to facilitate the connection between the connecting pipe 4 and the water outlet No. 103 and the water outlet No. 2 104. Under the threaded transmission of the locking screw 404 and the locking butterfly cap 405, the lower arc ring 402 and the upper arc ring 403 extrude and wrap the outer surfaces of the water outlet No. 103, the water outlet No. 2 104 and the connecting pipe 4, thereby achieving the effect of fixing the connecting pipe 4 and meeting the subsequent disassembly requirements of the device.

[0031] Specifically, the type of the plunger pump 2 is a high-precision dual-channel piston plunger pump, and the caliber of the No. 1 flow meter 503 is Φ1mm or Φ4mm;

[0032] In this embodiment, the flow range of the plunger pump 2 is 0-100 ml / min, the flow range of the magnetic pump 3 is 5-1000 ml / min, the setting of the pressure and flow stabilizing device 5 is mainly used to ensure the stability of the water flow, and the No. 1 pressure transmitter 501 and the No. 2 pressure transmitter 502 can monitor the pressure fluctuation in the pipeline.

[0033] Specifically, the No. 3 flow meter 8 is installed vertically, and the No. 4 flow meter 9 is installed horizontally. The calibers of the No. 4 flow meter 9 and the No. 3 flow meter 8 are Φ4mm to Φ15mm;

[0034] In this embodiment, the electromagnetic three-way valve 7 is mainly used to control the flow direction of water, so that the water flows through the vertically installed No. 3 flow meter 8 or the horizontally installed No. 4 flow meter 9, meeting the switching needs of the calibration personnel.

[0035] Specifically, a weighing module 1001 is provided at the bottom of the weighing barrel 10, wherein the weighing module 1001 is electrically connected to the control box at the backstage through a wire, and a constant pressure device 101, a temperature transmitter 102, a plunger pump 2, a magnetic pump 3, a voltage and flow stabilizing device 5, a No. 1 pressure transmitter 501, a No. 2 pressure transmitter 502, a No. 1 flowmeter 503, an electronic balance 505, a No. 2 flowmeter 6, an electromagnetic three-way valve 7, a No. 3 flowmeter 8 and a No. 4 flowmeter 9 are electrically connected to the control box at the backstage through wires respectively;

[0036] In this embodiment, the setting of the constant pressure device 101 can ensure that the water source pressure in the water tank 1 is in a constant state. The setting of the temperature transmitter 102 is mainly used to monitor the water temperature in the water tank 1 in real time. The setting of the weighing module 1001 is mainly used to weigh and measure the extracted water and transmit the measured value to the control box, thereby achieving the purpose of flow calibration.

[0037] The working process of the utility model is as follows: when using a micro-flow calibration device with self-calibration and traceability functions, the plunger pump 2 and the magnetic pump 3 are first moved and ensure that the convex ring 401 is close to the groove 105 until the convex ring 401 is completely in contact with the groove 105, and then the lower arc ring 402 and the upper arc ring 403 are sleeved on the joints between the connecting pipe 4 and the first water outlet 103 and the second water outlet 104, and then a rotational force is applied to the locking butterfly cap 405. Under the threaded cooperation between the locking butterfly cap 405 and the locking screw 404, the upper arc ring 403 and the lower arc ring 402 move towards each other and rub and squeeze the connecting pipe 4, the first water outlet 103 and the second water outlet 104, thereby completing the convenient installation operation of the plunger pump 2 and the magnetic pump 3, which is convenient for the subsequent flow calibration operation. Under the action of the magnetic pump 3, the flow range is divided into two pipelines. In the pipeline of the No. 1 water outlet 103, the No. 1 flowmeter 503 can measure the flow in the pipeline and transmit it to the control box for recording, and the electronic balance 505 can measure the fluid discharged from the No. 1 filling head 504. In the pipeline of the No. 2 water outlet 104, the No. 2 flowmeter 6 measures the flow in the pipeline. According to the required requirements, the direction of the water flow is changed by the electromagnetic three-way valve 7 to pass through the No. 3 flowmeter 8 or the No. 4 flowmeter 9 with different connection methods, and the weighing module 1001 weighs and measures the fluid discharged from the No. 2 filling head 801 or the No. 3 filling head 901, thereby facilitating the comparison of the set flow, standard flow and actual flow in various situations, meeting the needs of calibration personnel.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A micro-flow calibration device with self-calibration and traceability functions, comprising a water tank (1), a plunger pump (2) and a magnetic pump (3), characterized in that: The inner bottom of the water tank (1) is provided with a constant pressure device (101) and a temperature transmitter (102), respectively; a first water outlet (103) and a second water outlet (104) are fixedly installed on the right side of the water tank (1); a groove (105) is provided at the right end of each of the first water outlet (103) and the second water outlet (104); a connecting pipe (4) is fixedly installed at the input end of each of the plunger pump (2) and the magnetic pump (3); and the connecting pipe (4) is A convex ring (401) is fixedly provided at the left end, a lower arc ring (402) and an upper arc ring (403) are respectively provided on the outer side of the connecting pipe (4), a locking screw (404) is fixedly installed on the top front side of the lower arc ring (402), and a locking butterfly cap (405) is provided on the outer thread sleeve of the locking screw (404), and the output ends of the plunger pump (2) and the magnetic pump (3) are both connected to a voltage and flow stabilizing device (5), and the right end of the voltage and flow stabilizing device (5) is divided into A No. 1 pressure transmitter (501) and a No. 2 pressure transmitter (502) are separately fixedly installed, the right end of the No. 1 pressure transmitter (501) is connected to a No. 1 flow meter (503) via a pipeline, the right end of the No. 1 flow meter (503) is provided with a No. 1 filling head (504), the bottom end of the No. 1 filling head (504) is provided with an electronic balance (505), and the right end of the No. 2 pressure transmitter (502) is connected to a No. 2 flow meter (6) via a pipeline. The right end of the No. 2 flow meter (6) is provided with an electromagnetic three-way valve (7), the top of the electromagnetic three-way valve (7) is provided with a No. 3 flow meter (8), the top of the No. 3 flow meter (8) is provided with a No. 2 filling head (801), the right end of the electromagnetic three-way valve (7) is provided with a No. 4 flow meter (9), the right end of the No. 4 flow meter (9) is provided with a No. 3 filling head (901), and a weighing bucket (10) is provided below the No. 3 filling head (901).

2. The micro-flow calibration device with self-calibration and traceability functions according to claim 1, characterized in that: The inner wall of the groove (105) is in sealing contact with the outer surface of the convex ring (401), and the outer dimensions of the first water outlet (103) and the second water outlet (104) are consistent with the outer dimensions of the connecting pipe (4).

3. The micro-flow calibration device with self-calibration and traceability functions according to claim 1, characterized in that: The lower arc ring (402) and the upper arc ring (403) are rotatably connected via a pin shaft, one end of the locking screw (404) away from the lower arc ring (402) fits through the bottom front end surface of the upper arc ring (403) and extends upward, and the inner surfaces of the lower arc ring (402) and the upper arc ring (403) are provided with a friction layer.

4. The micro-flow calibration device with self-calibration and traceability functions according to claim 1, characterized in that: The type of the plunger pump (2) is a high-precision dual-channel piston plunger pump, and the caliber of the No. 1 flow meter (503) is Φ1 mm or Φ4 mm.

5. The micro-flow calibration device with self-calibration and traceability functions according to claim 1, characterized in that: The No. 3 flow meter (8) is installed vertically, and the No. 4 flow meter (9) is installed horizontally. The calibers of the No. 4 flow meter (9) and the No. 3 flow meter (8) are Φ4 mm to Φ15 mm.

6. The micro-flow calibration device with self-calibration and traceability functions according to claim 1, characterized in that: A weighing module (1001) is arranged at the bottom of the weighing bucket (10), wherein the weighing module (1001) is electrically connected to a control box at the backstage via a wire.

7. The micro-flow calibration device with self-calibration and traceability functions according to claim 1, characterized in that: The constant pressure device (101), the temperature transmitter (102), the plunger pump (2), the magnetic pump (3), the pressure and flow stabilizing device (5), the No. 1 pressure transmitter (501), the No. 2 pressure transmitter (502), the No. 1 flow meter (503), the electronic balance (505), the No. 2 flow meter (6), the electromagnetic three-way valve (7), the No. 3 flow meter (8) and the No. 4 flow meter (9) are respectively electrically connected to a control box at the backstage via wires.

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