Quantitative conveying device for liquid medium

Abstract

The utility model relates to a liquid medium quantitative conveying device which comprises a liquid storage tank, a liquid level sensor arranged on the liquid storage tank, a pressurizing conveying pipe communicated with the liquid storage tank, a pressurizing pump and an adjusting valve arranged on the pressurizing conveying pipe, a first conveying pipe communicated with the pressurizing conveying pipe, a first rectifying pipe arranged on the first conveying pipe, and a second rectifying pipe arranged on the second conveying pipe. A first rectifying pipe is arranged on the first conveying pipe, a second rectifying pipe is arranged on the first rectifying pipe, a turbine flow sensor is arranged on the second rectifying pipe, a first stop valve is arranged on the turbine flow sensor, a first pipeline connecting device is arranged between the first conveying pipe and the first rectifying pipe, and a second pipeline connecting device is arranged between the first rectifying pipe and the second rectifying pipe. The first pipeline connecting device and the second pipeline connecting device each comprise a first flange, a second flange, a fastening bolt and a rectifying hole plate. The length needed by the rectifying tube can be shortened, and the requirement of quantitative liquid conveying equipment for installation space is lowered. The utility model has the advantages of convenient use and wide market prospect.

Description

Technical Field

[0001] The utility model relates to the field of quantitative conveying equipment for liquid media, in particular to a quantitative conveying device for liquid media. Background Art

[0002] Liquid conveying equipment is required for the filling of finished liquid products and the transfer of liquid intermediate products or liquid auxiliary materials during the production process. Liquid quantitative conveying equipment is obtained by adding corresponding volume metering equipment or mass metering equipment to the liquid conveying equipment. The liquid volume metering device is the core component of the liquid quantitative conveying equipment. There are two mainstream design methods for liquid volume metering devices used in liquid quantitative conveying equipment. The first is to use a metering tank to measure the volume of the incoming liquid medium, and the second is to measure the volume of the liquid through a flow meter. The method of using a metering tank to measure the volume of the liquid medium is usually used in production conditions where the volume of the liquid medium used repeatedly in a single production does not change much. After measurement using a metering tank, it is then transported to the target area through the corresponding pipeline; while the use of a flow meter can be applied to target conditions where the volume of the liquid medium transported changes greatly.

[0003] However, accurate volume measurement using a flowmeter is significantly affected by objective factors, resulting in discrepancies between the flowmeter's feedback value and the actual delivery volume. The flowmeter's feedback value includes both instantaneous flow and cumulative flow. The medium pressurized by the delivery pump contains mechanical waves generated by the pump's pressure increase, which can cause the pressurized liquid medium to contain significant turbulence. If the liquid medium detected by the flowmeter contains significant turbulence, the flowmeter's instantaneous flow fluctuations increase, leading to a discrepancy between the flowmeter's feedback cumulative flow and the actual delivery volume. Prior art methods for eliminating turbulence carried by the pressurized liquid medium due to the booster pump's pressure increase involve rectifying the pressurized medium using a straight rectifier tube of sufficient length, thereby eliminating the turbulence carried by the pressurized liquid medium. The minimum length requirement for the rectifier tube is at least 10 times the inner diameter of the flowmeter's measuring tube. The selected rectifier tube length varies depending on the boost amplitude. Simply using a rectifier tube to pressurize the liquid medium after the booster pump increases the installation space required for the liquid quantitative delivery equipment, making it difficult for companies with limited installation space to use it. Therefore, it is necessary to consider using other rectifier devices in conjunction with the rectifier tube to reduce the installation space requirement of the liquid quantitative delivery equipment, thereby improving applicability and increasing market acceptance. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a quantitative delivery device for liquid media that can shorten the length required for a rectifier tube and thereby reduce the installation space requirements of a liquid quantitative delivery device, thereby overcoming the defects in the prior art.

[0005] The technical solution adopted by the utility model is: a quantitative conveying device for a liquid medium, comprising a liquid storage tank, the liquid storage tank being provided with a liquid level sensor, the bottom end of the liquid storage tank being connected with a boost delivery pipe, the boost delivery pipe being provided with a boost pump and a regulating valve, the boost delivery pipe being connected with an inlet end of a first delivery pipe, the outlet end of the first delivery pipe being provided with an inlet end of a first rectifier tube, the outlet end of the first rectifier tube being provided with an inlet end of a second rectifier tube, the outlet end of the second rectifier tube being provided with an inlet end of a turbine flow sensor, the outlet end of the turbine flow sensor being provided with a first stop valve, a first pipeline connecting device being provided between the first delivery pipe and the first rectifier tube, a second pipeline connecting device being provided between the first rectifier tube and the second rectifier tube, the first pipeline connecting device and the second pipeline connecting device both comprising a first flange, a second flange, fastening bolts provided on the first flange and the second flange, and a rectifier orifice plate provided on the first flange and the second flange.

[0006] Preferably, a first limiting groove is provided on one end of the first flange facing the second flange, and a second limiting groove is provided on one end of the second flange facing the first flange. The inner cavity of the second limiting groove adopts a cylindrical structure, the structure of the inner cavity of the first limiting groove corresponds to the structure of the inner cavity of the second limiting groove, the central axis of the inner cavity of the second limiting groove and the central axis of the inner cavity of the first limiting groove are coaxial, the rectifying orifice plate and the second limiting groove are matched, and the thickness of the rectifying orifice plate is not greater than the sum of the depth of the second limiting groove and the depth of the first limiting groove.

[0007] Preferably, the first pipe connecting device and the second pipe connecting device further include a sealing ring disposed between the first flange and the second flange and located outside the rectifying orifice plate; the sealing ring is an annular structure made of rubber material.

[0008] Preferably, a three-way reversing valve is arranged between the boosting delivery pipe and the first delivery pipe, the three-way reversing valve includes an inlet end, a first outlet end and a second outlet end, the inlet end of the three-way reversing valve is connected to the outlet end of the boosting delivery pipe, the first outlet end of the three-way reversing valve is connected to the inlet end of the first delivery pipe, and a second delivery pipe is arranged between the second outlet end of the three-way reversing valve and the liquid storage tank.

[0009] Preferably, a three-way connecting pipe is provided on the bottom end of the liquid storage tank, and the three-way connecting pipe includes a longitudinal pipe extending in the vertical direction and a transverse pipe provided on the longitudinal pipe and extending in the horizontal direction, the longitudinal pipe and the transverse pipe are connected, the top end of the longitudinal pipe is installed on the bottom end of the liquid storage tank, a sewage pipe is provided on the bottom end of the longitudinal pipe, a second stop valve is provided on the sewage pipe, an end of the transverse pipe away from the longitudinal pipe is connected to the inlet end of the boost delivery pipe, and a filter plate is provided in the end of the transverse pipe close to the longitudinal pipe.

[0010] Preferably, the rectifying orifice plate includes an orifice plate body and a plurality of rectifying holes evenly arranged on the orifice plate body, and the inner diameter of the rectifying hole at one end facing the booster pump gradually increases as the rectifying hole gradually approaches the booster pump.

[0011] The present invention has the following beneficial effects: First, the present invention utilizes the rectifying orifice plate of the first pipe connecting device, the first rectifying tube, the rectifying orifice plate of the second pipe connecting device, and the second rectifying tube to sequentially rectify the turbulent liquid medium after being pressurized by the booster pump, thereby achieving a stable flat flow state for the liquid medium delivered to the turbine flow sensor, reducing the fluctuation of the instantaneous flow rate feedback of the turbine flow sensor, thereby improving the accuracy of the cumulative flow rate feedback of the turbine flow sensor. Compared with simply using a linear rectifying tube to rectify the turbulent liquid medium after being pressurized by the booster pump, the straight length required for the overall installation of the equipment is shortened, thereby reducing the installation space requirement. Furthermore, the product feedback liquid flow parameters is achieved by using a turbine flow sensor. Compared with the poor feedback accuracy of vortex flowmeters for liquid media with low flow rates and the inability of electromagnetic flowmeters to measure the flow rate of non-conductive liquid media, the turbine flow sensor has a wider range of applications and is more conducive to industrialization.

[0012] Secondly, the liquid storage tank of the present invention is provided with a liquid level sensor and a ventilation valve, and the installation of the liquid level sensor facilitates the feedback of liquid level parameters.

[0013] The utility model has the advantages of simple structure, convenient operation, ingenious design, greatly improved work efficiency, good social and economic benefits, and is a product that is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure 2 for Figure 1 A partially enlarged schematic diagram of detail A.

[0016] Figure 3 for Figure 1 A partially enlarged schematic diagram of detail B. DETAILED DESCRIPTION

[0017] like Figures 1 to 3 As shown, a quantitative delivery device for a liquid medium includes a liquid storage tank 1, the liquid storage tank 1 is provided with a liquid level sensor 2 and a ventilation valve 3, the bottom end of the liquid storage tank 1 is connected to a boost delivery pipe 4, the boost delivery pipe 4 is provided with a boost pump 5 and a regulating valve 6, the boost delivery pipe 4 is connected to the inlet end of a first delivery pipe 7, the outlet end of the first delivery pipe 7 is provided with the inlet end of a first rectifier tube 8, the outlet end of the first rectifier tube 8 is provided with the inlet end of a second rectifier tube 9, and the outlet end of the second rectifier tube 9 is provided with the inlet end of a turbine flow sensor 10 The inlet end of the first stop valve 11 is provided on the outlet end of the turbine flow sensor 10, and the first stop valve 11 adopts an electromagnetic valve; a first pipeline connecting device is provided between the first delivery pipe 7 and the first rectifier tube 8, and a second pipeline connecting device is provided between the first rectifier tube 8 and the second rectifier tube 9. The first pipeline connecting device and the second pipeline connecting device both include a first flange 12, a second flange 13, fastening bolts 14 provided on the first flange 12 and the second flange 13, and a rectifying orifice plate 15 provided on the first flange 12 and the second flange 13.

[0018] A first limiting groove 16 is formed on the end of the first flange 12 facing the second flange 13, and a second limiting groove 17 is formed on the end of the second flange 13 facing the first flange 12. The inner cavity of the second limiting groove 17 adopts a cylindrical structure. The structure of the inner cavity of the first limiting groove 16 corresponds to the structure of the inner cavity of the second limiting groove 17. The central axis of the inner cavity of the second limiting groove 17 and the central axis of the inner cavity of the first limiting groove 16 are coaxial. The rectifying orifice 15 and the second limiting groove 17 are matched. The thickness of the rectifying orifice 15 is no greater than the sum of the depth of the second limiting groove 17 and the depth of the first limiting groove 16. This facilitates the installation of the rectifying orifice 15 on the first flange 12 and the second flange 13, changes the shape of the gap between the first flange 12 and the second flange 13, and increases the flow resistance that the medium needs to overcome when passing through the gap between the first flange 12 and the second flange 13.

[0019] Both the first and second pipe connection devices further include a sealing ring 18 disposed between the first flange 12 and the second flange 13 and located outside the orifice plate 15. The sealing ring is an annular structure made of rubber. The sealing ring 18 seals the gap between the first and second flanges 12, 13, thereby reducing leakage of liquid medium therethrough.

[0020] In the case of repeatedly using this product for quantitative delivery, repeatedly opening and closing the booster pump 5 may easily cause unstable medium delivery and repeatedly opening and closing the booster pump 5 may also easily cause a reduction in the normal service life of the booster pump 5. Therefore, a three-way reversing valve 19 is provided between the booster delivery pipe 4 and the first delivery pipe 7 described in this product. The three-way reversing valve 19 includes an inlet end, a first outlet end and a second outlet end. The inlet end of the three-way reversing valve 19 is connected to the outlet end of the booster delivery pipe 4, the first outlet end of the three-way reversing valve 19 is connected to the inlet end of the first delivery pipe 7, and a second delivery pipe 20 is provided between the second outlet end of the three-way reversing valve 19 and the liquid storage tank 1. When quantitative delivery is required, the inlet end of the three-way reversing valve 19 and the first outlet end of the three-way reversing valve 19 are connected to achieve a first use state. In the first use state, the liquid medium stored in the liquid storage tank 1 is pressurized by the booster pump 5 and delivered to the first delivery pipe 7. The liquid medium is then rectified in sequence through the rectifying orifice 15 of the first pipeline connecting device, the first rectifier tube 8, the rectifying orifice 15 of the second pipeline connecting device, and the second rectifier tube 9. After the flow rate is fed back by the turbine flow sensor 10, the liquid medium is delivered to the target area through the outlet end of the first stop valve 11. During the intermittent period of quantitative delivery, the inlet end of the three-way reversing valve 19 and the second outlet end of the three-way reversing valve 19 can be connected to achieve a second use state. The liquid medium pressurized by the booster pump 5 is returned to the liquid storage tank 1 through the second delivery pipe 20 to generate reflux.

[0021] A three-way connecting pipe 21 is provided at the bottom end of the liquid storage tank 1. The three-way connecting pipe 21 includes a vertically extending longitudinal pipe and a horizontally extending transverse pipe provided on the longitudinal pipe. The longitudinal and transverse pipes are connected. The top end of the longitudinal pipe is mounted on the bottom end of the liquid storage tank 1. A drain pipe 22 is provided at the bottom end of the longitudinal pipe. A second shut-off valve 23 is provided on the drain pipe 22. The end of the transverse pipe away from the longitudinal pipe is connected to the inlet end of the pressurized delivery pipe 4. A filter plate 24 is provided at the end of the transverse pipe close to the longitudinal pipe. This facilitates filtering of solid impurities contained in the liquid medium stored in the liquid storage tank 1 and facilitates discharge of the solid impurities through the drain pipe 22 by their own gravity.

[0022] The orifice plate 15 comprises an orifice body and a plurality of orifice holes evenly spaced therein. The inner diameter of the orifice holes at the end facing the booster pump 5 gradually increases as the holes approach the booster pump 5. This reduces the pressure drop experienced by the pressurized liquid medium upon entering the orifice plate 15 toward the booster pump 5. After entering the orifice holes, the pressure of the pressurized liquid medium gradually decreases, making it easier for the pressurized liquid medium to pass through the orifice plate 15. Because the pressurized liquid medium has already undergone a decompression process after passing through the orifice plate 15 of the first pipe connection device, eliminating most of the turbulence, the orifice holes on the orifice plate 15 of the first pipe connection device are no larger than the orifice holes on the orifice plate 15 of the second pipe connection device. This facilitates further rectification of the liquid medium passing through the orifice plate 15 of the first pipe connection device, in addition to the rectification already performed by the orifice plate 15 of the first pipe connection device.

[0023] A U-shaped delivery pipe 25 is provided at the outlet end of the first stop valve 11. The U-shaped delivery pipe 25 has an inverted U-shaped structure, and a connecting elbow is provided between the U-shaped delivery pipe 25 and the first stop valve 11. An air inlet pipe 26 is provided at the top end of the U-shaped delivery pipe 25, and a third stop valve 27 is provided on the air inlet pipe 26. The top end of the U-shaped delivery pipe 25 is located above the inner cavity of the first stop valve 11. The central axis of the inner cavity of the first delivery pipe 7, the central axis of the inner cavity of the first rectifier tube 8, the central axis of the inner cavity of the second rectifier tube 9, the central axis of the inner cavity of the turbine flow sensor 10, and the central axis of the inner cavity of the first stop valve 11 are coaxial. The installation of the U-shaped delivery pipe 25 facilitates the formation of a liquid seal, thereby preventing gas from entering the inner cavity of the first delivery pipe 7, the inner cavity of the first rectifier tube 8, the inner cavity of the second rectifier tube 9, the inner cavity of the turbine flow sensor 10, or the inner cavity of the first stop valve 11, thereby affecting the difference in the repeated quantitative delivery of the liquid medium.

[0024] The method of using this product is as follows: Figures 1 to 3 As shown, the following steps are included:

[0025] S1. Open the first stop valve 11, close the third stop valve 27 and adjust the use state of the three-way reversing valve 19 so that the inlet end of the three-way reversing valve 19 and the first outlet end of the three-way reversing valve 19 are connected; the liquid medium stored in the liquid storage tank 1 enters the longitudinal pipe of the three-way connecting pipe 21 under the action of gravity and is filtered by the filter plate 24. The solid particles mixed in the liquid medium stored in the liquid storage tank 1 form solid-liquid separation under the combined action of the gravity of the solid particles themselves and the screening of the filter plate 24. The solid phase particles stay in the drain pipe 22 above the second stop valve 23 and the longitudinal pipe of the three-way connecting pipe 21 under the action of their own gravity, and the remaining liquid phase medium is transported to the booster delivery pipe 4 through the horizontal pipe of the three-way connecting pipe 21.

[0026] S2. The boost delivery pipe 4 receives the liquid medium after being filtered by the filter plate 24, and then after being pressurized by the boost pump 5 and the flow rate is adjusted by the regulating valve 6, it passes through the inlet end of the three-way reversing valve 19, the first outlet end of the three-way reversing valve 19 and the first delivery pipe 7, and is rectified in sequence through the rectifying orifice 15 of the first pipeline connecting device, the first rectifier tube 8, the rectifying orifice 15 of the second pipeline connecting device and the second rectifier tube 9 to form a stable fluid and deliver it to the turbine flow sensor 10 to feedback the flow parameter, and then deliver it to the target area through the first stop valve 11 and the U-shaped delivery pipe 25 until the cumulative flow rate feedback from the turbine flow sensor 10 reaches a preset range; finally, the third stop valve 27 is opened until the liquid medium no longer flows naturally, thereby completing a quantitative delivery.

[0027] S3. When the cumulative flow rate fed back by the turbine flow sensor 10 reaches the preset range, the first stop valve 11 is closed and the state of the three-way reversing valve 19 is switched. At this time, the liquid in the liquid storage tank 1 is sequentially sent back to the liquid storage tank 1 through the three-way connecting pipe 21, the boost delivery pipe 4, the inlet end of the three-way reversing valve 19, the second outlet end of the three-way reversing valve 19 and the second delivery pipe 20 to form a circulation, thereby completing the switching of the liquid medium from one-time quantitative delivery to the intermittent delivery state of the liquid medium.

[0028] S4. Repeat steps S1 to S3 until the number of times required for quantitative delivery reaches a preset number.

[0029] In step S1 and step S2, after the third stop valve 27 is opened, the outside air enters from the air inlet pipe 26, thereby prompting the descending pipe section of the U-shaped delivery pipe 25 close to the first stop valve 11 side and the top of the U-shaped delivery pipe 25 to be freely discharged from the end of the U-shaped delivery pipe 25 close to the first stop valve 11, and part of the liquid will be stored in the ascending pipe section of the U-shaped delivery pipe 25 close to the first stop valve 11 side to form a liquid seal, thereby reducing the repeated opening and closing of the first stop valve 11. The outside air enters the first delivery pipe 7, the first rectifier tube 8, the second rectifier tube 9 and the turbine flow sensor 10 through the first stop valve 11, thereby causing a difference between the feedback parameter of the turbine flow sensor 10 and the volume parameter of the actually transported liquid medium.

[0030] In this embodiment, the rectifier orifice 15 of the first pipe connection device, the first rectifier tube 8, the rectifier orifice 15 of the second pipe connection device, and the second rectifier tube 9 sequentially rectify the turbulent liquid medium after being pressurized by the booster pump 5, thereby achieving a stable flat flow state for the liquid medium delivered to the turbine flow sensor 10. This reduces fluctuations in the instantaneous flow rate reported by the turbine flow sensor 10, thereby improving the accuracy of the cumulative flow rate feedback of the turbine flow sensor 10. Compared with simply using a linear rectifier tube to rectify the turbulent liquid medium after being pressurized by the booster pump 5, the straight length required for the overall installation of the equipment is shortened, thereby reducing the installation space requirement. Furthermore, the feedback of liquid flow parameters in this product is achieved by using the turbine flow sensor 10. Compared with the poor feedback accuracy of vortex flowmeters for liquid media with low flow rates and the inability of electromagnetic flowmeters to measure the flow rate of non-conductive liquid media, the turbine flow sensor 10 has a wider range of applications and is more conducive to industrialization.

[0031] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A quantitative delivery device for a liquid medium, characterized in that: The invention comprises a liquid storage tank (1), wherein the liquid storage tank (1) is provided with a liquid level sensor (2), the bottom end of the liquid storage tank (1) is connected to a boost delivery pipe (4), the boost delivery pipe (4) is provided with a boost pump (5) and a regulating valve (6), the boost delivery pipe (4) is connected to the inlet end of a first delivery pipe (7), the outlet end of the first delivery pipe (7) is provided with the inlet end of a first rectifier tube (8), the outlet end of the first rectifier tube (8) is provided with the inlet end of a second rectifier tube (9), and the outlet end of the second rectifier tube (9) is provided with the inlet end of a turbine flow sensor (10). The turbine flow sensor (10) is provided with a first stop valve (11) at its outlet end, a first pipe connecting device is provided between the first delivery pipe (7) and the first rectifier pipe (8), and a second pipe connecting device is provided between the first rectifier pipe (8) and the second rectifier pipe (9), wherein the first pipe connecting device and the second pipe connecting device both include a first flange (12), a second flange (13), fastening bolts (14) provided on the first flange (12) and the second flange (13), and rectifier orifice plates (15) provided on the first flange (12) and the second flange (13).

2. The quantitative delivery device for liquid medium according to claim 1, characterized in that: A first limiting groove (16) is provided on one end of the first flange (12) facing the second flange (13), and a second limiting groove (17) is provided on one end of the second flange (13) facing the first flange (12). The inner cavity of the second limiting groove (17) adopts a cylindrical structure. The structure of the inner cavity of the first limiting groove (16) corresponds to the structure of the inner cavity of the second limiting groove (17). The central axis of the inner cavity of the second limiting groove (17) and the central axis of the inner cavity of the first limiting groove (16) are coaxial. The rectifying orifice plate (15) and the second limiting groove (17) are matched. The thickness of the rectifying orifice plate (15) is not greater than the sum of the depth of the second limiting groove (17) and the depth of the first limiting groove (16).

3. The quantitative delivery device for liquid medium according to claim 1, characterized in that: The first pipe connecting device and the second pipe connecting device also include a sealing ring (18) disposed between the first flange (12) and the second flange (13) and located outside the rectifying orifice plate (15); the sealing ring is an annular structure made of rubber material.

4. The quantitative delivery device for liquid medium according to claim 1, characterized in that: A three-way reversing valve (19) is provided between the boosting delivery pipe (4) and the first delivery pipe (7). The three-way reversing valve (19) includes an inlet end, a first outlet end, and a second outlet end. The inlet end of the three-way reversing valve (19) is connected to the outlet end of the boosting delivery pipe (4), the first outlet end of the three-way reversing valve (19) is connected to the inlet end of the first delivery pipe (7), and a second delivery pipe (20) is provided between the second outlet end of the three-way reversing valve (19) and the liquid storage tank (1).

5. The quantitative delivery device for liquid medium according to claim 1, characterized in that: A three-way connecting pipe (21) is provided on the bottom end of the liquid storage tank (1), and the three-way connecting pipe (21) includes a longitudinal pipe extending in the vertical direction and a transverse pipe provided on the longitudinal pipe and extending in the horizontal direction, the longitudinal pipe and the transverse pipe are connected, the top end of the longitudinal pipe is installed on the bottom end of the liquid storage tank (1), a sewage pipe (22) is provided on the bottom end of the longitudinal pipe, and a second stop valve (23) is provided on the sewage pipe (22), an end of the transverse pipe away from the longitudinal pipe is connected to the inlet end of the boost delivery pipe (4), and a filter plate (24) is provided in the end of the transverse pipe close to the longitudinal pipe.

6. The quantitative delivery device for liquid medium according to claim 1, characterized in that: The rectifying orifice plate (15) comprises an orifice plate body and a plurality of rectifying holes evenly arranged on the orifice plate body, and the inner diameter of the rectifying hole at one end facing the booster pump (5) gradually increases as the rectifying hole gradually approaches the booster pump (5).

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