CN115501522B - Testing device of foam proportion mixer - Google Patents
Testing device of foam proportion mixer Download PDFInfo
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- CN115501522B CN115501522B CN202211192837.1A CN202211192837A CN115501522B CN 115501522 B CN115501522 B CN 115501522B CN 202211192837 A CN202211192837 A CN 202211192837A CN 115501522 B CN115501522 B CN 115501522B
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/02—Making of fire-extinguishing materials immediately before use of foam
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Measuring Volume Flow (AREA)
Abstract
The application relates to a testing device for a foam proportioning device, configured to detect a foam proportioning device not mounted on a fire-fighting apparatus, the testing device comprising: a water inlet line for delivering water to the foam proportioner; a water inlet flow detection part arranged in the water inlet pipeline for detecting the flow V of the water conveyed by the water inlet pipeline to the foam proportion mixer 1 The method comprises the steps of carrying out a first treatment on the surface of the A foaming agent pipeline for conveying foaming agent to the foam proportion mixer; a foaming agent flow detection part arranged in the foaming agent pipeline for detecting the flow V of the foaming agent conveyed by the foaming agent pipeline to the foam proportion mixer 2 The method comprises the steps of carrying out a first treatment on the surface of the Control means, in signal connection with the inflow water flow detection means and the foam agent flow detection means (16), respectively, the control means being configured to calculate a measured addition proportion ψ of a foam agent introduced by the foam ratio mixer and to compare the measured addition proportion ψ with a set addition proportion ψ 0 If |ψ - ψ 0 If i is less than the predetermined value, the foam proportioner is deemed satisfactory, where ψ=v 2 /(V 1 +V 2 )。
Description
Technical Field
The application relates to the field of foam fire fighting equipment, in particular to a testing device of a foam proportion mixer.
Background
The traditional performance detection method of the foam proportion mixer comprises the steps of installing purchased components such as the foam proportion mixer and the like in a fire engine pump chamber according to requirements, and detecting whether the adding precision of the foam proportion mixer meets the mixing ratio precision requirement of the vehicle foam system in GB 7956.3 when a fire test is carried out on the whole vehicle fire engine system. The method has the following defects:
(1) The operation is complex, once the adding precision of the automatic foam proportion mixer does not reach the standard and the flow coefficient of the flowmeter cannot meet the requirement of adding precision, the problems of disassembly of the whole system and reassembling of the components and parts can be considered, and the time and the labor are consumed.
(2) The method for respectively installing the alternative products on the fire-fighting truck by the traditional method is obviously time-consuming, labor-consuming and extremely low in efficiency, and particularly for the high-flow compressed air foam fire-fighting truck, the structure is more complex, the installation difficulty is higher, so that the adding precision of the fire-fighting truck is necessary to be further verified before loading the fire-fighting truck.
Disclosure of Invention
The application aims to provide a testing device of a foam proportion mixer, which aims to solve the problems of complex operation and difficult mixer model selection caused by testing after the foam proportion mixer is installed on fire-fighting equipment in the prior art.
According to an aspect of the embodiments of the present application, there is provided a testing apparatus of a foam proportioning device configured to detect a foam proportioning device not mounted on a fire apparatus, the testing apparatus of a foam proportioning device comprising:
a water inlet line for delivering water to the foam proportioner;
a water inlet flow detection part arranged in the water inlet pipeline for detecting the flow V of the water conveyed by the water inlet pipeline to the foam proportion mixer 1 ；
A foaming agent pipeline for conveying foaming agent to the foam proportion mixer;
a foaming agent flow detection part arranged in the foaming agent pipeline for detecting the flow V of the foaming agent conveyed by the foaming agent pipeline to the foam proportion mixer 2 ；
A control device in signal connection with the water inlet flow detection component and the foaming agent flow detection component respectively, wherein the control device is configured to calculate a measured addition proportion psi of the foaming agent introduced by the foam proportion mixer and compare the measured addition proportion psi with a set addition proportion psi 0 If |ψ - ψ 0 If i is less than the predetermined value, the foam proportioner is deemed satisfactory, where ψ=v 2 /(V 1 +V 2 )。
In some embodiments, the testing device of the foam proportioner further comprises a water supply line, the water inlet line and the water supply line being connected between the inlet end and the outlet end of the water supply line.
In some embodiments, one end of the water inlet pipeline is connected with the water supply pipeline, and the other end of the water inlet pipeline is provided with a first detachable connection structure for connecting the foam proportion mixer to be detected.
In some embodiments, one end of the foamer tube is adapted to be connected to a foamer reservoir and the other end is provided with a second detachable connection for connection to a foamer mixer.
In some embodiments, the testing device of the foam proportioner further comprises a carrier portion on which the water supply line and/or the foamer line are mounted, the lower portion of the carrier portion being mounted with wheels.
In some embodiments, the testing device of the foam proportioner further comprises a return line in communication with the outlet end of the water supply line to deliver water discharged from the outlet end of the water supply line to the sink;
and the reflux regulating valve is arranged in the reflux pipeline to regulate the pressure and/or flow of water in the water supply pipeline.
In some embodiments, the testing device of the foam proportioner further comprises a purge line having an inlet end in communication with the water supply line and an outlet end in communication with the foamer line.
In some embodiments, the testing device of the foam proportioner further comprises:
a water supply flow rate detecting part arranged in the water supply pipeline and positioned at the upstream of the joint of the water inlet pipeline and the water supply pipeline for detecting the water supply flow rate V of the water supply pipeline 3 ；
A backwater flow detection part arranged at the downstream of the joint of the water inlet pipeline and the water supply pipeline for detecting backwater flow V of the water supply pipeline 4 ；
The control device is respectively connected with the water supply flow detection component and the backwater flow detection component in a signal way and is configured to be within the range of |psi-psi 0 Judging V when I is larger than a preset value 1 Whether or not to be equal to V 3 -V 4 If V 1 ＝V 3 -V 4 Then the accuracy of the water inflow detection part is judged to be accurate, if V 1 ≠V 3 -V 4 Then the water inflow rate detection part is adjusted to lead V 1 ＝V 3 -V 4 。
In some embodiments, the testing device of the foam proportioner further comprises:
the foam pipeline is used for connecting the outlet end of the foam proportional mixer;
a foam flow rate detecting part arranged in the foam pipeline for detecting the flow rate V of the foam in the foam pipeline 5 ，；
The control device is in signal connection with the foam flow detection component and is configured to control the foam flow in the range of |psi-psi 0 Judging V when I is larger than a preset value 2 Whether or not to be equal to V 5 -(V 3 -V 4 ) If V 2 ＝V 5 -(V 3 -V 4 ) The accuracy of the foamer flow detection part is judged to be accurate, if V 2 ≠V 5 -(V 3 -V 4 ) Then the foaming agent flow detection part is adjusted to lead V 2 ＝V 5 -(V 3 -V 4 )。
In some embodiments, the control device is configured to determine that the control device is at |ψ - ψ 0 When I is larger than a predetermined value and the accuracy of the inflow water flow detecting part and the foamer flow detecting part is accurate, the mixing ratio adjusting valve of the foam ratio mixer is adjusted so that I psi-psi 0 The i is less than a predetermined value or the foam proportioner is judged to be unacceptable.
By applying the technical scheme of the application, the setting addition proportion psi of the foam proportion mixer 0 For its own calibrated proportion, the measured addition proportion ψ obtained by measurement and calculation is compared with the set addition proportion ψ for the foam proportion mixer itself calibration 0 The foam proportioning mixer is detected when the foam proportioning mixer is not installed on fire-fighting equipment, so that the problems of complex operation and difficult mixer shape selection caused by retesting after the foam proportioning mixer is installed on the fire-fighting equipment in the related art are solved.
Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the application, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 shows a system block diagram of a test apparatus for a foam proportioning mixer in accordance with an embodiment of the present application;
FIG. 2 shows a schematic structural view of a test device of a foam proportioning mixer in accordance with an embodiment of the present application;
fig. 3 shows a schematic control flow diagram of a test apparatus for a foam proportioning mixer in accordance with an embodiment of the present application.
In the figure: 1. a pool; 2. a filter; 3. a motor; 4. a water pump; 5. a water supply flow rate detecting part; 6. a water supply pressure detecting part; 7. a water supply line; 8. a water inlet control valve; 9. a water inlet pipeline; 10. cleaning a control valve; 11. cleaning a pipeline; 12. a foam pressure detecting member; 13. a water inflow amount detecting section; 14. a venturi tube; 15. a proportional valve; 16. a foaming agent flow rate detecting part; 17. a foaming agent pressure detecting part; 18. a foamer line; 19. a foaming agent storage tank; 20. a foam pipeline; 21. a return line; 22. a backwater flow detection means; 23. a reflux regulating valve; 24. a foamer control valve; 25. a control device; 26. a carrying part; 27. an outlet; 28. a foaming agent inlet; 29. an inlet; 30. foam flow detection means.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1 and 2 in combination, the testing device of the foam proportioning device of the present embodiment is configured to detect a foam proportioning device that is not mounted on fire-fighting equipment, and the testing device of the foam proportioning device includes a water inlet pipe 9, a water inlet flow rate detecting part 13, a foaming agent pipe 18, a foaming agent flow rate detecting part 16, and a control device 25.
The water inlet line 9 is used to feed water to the foam proportioner. A water inlet flow rate detection part 13 is arranged in the water inlet pipeline 9 to detect the flow rate V of the water which is conveyed to the foam proportion mixer by the water inlet pipeline 9 1 . The foamer line 18 is used to deliver foamer to the foam proportioner. A foamer flow sensing assembly 16 is disposed in the foamer tube 18 for sensing the flow V of foamer delivered by the foamer tube 18 to the foamer mixer 2 . The control device 25 is in signal connection with the inflow detection part 13 and the foam agent flow detection part 16, respectively, the control device 25 being configured to calculate a measured addition proportion ψ of the foam agent introduced by the foam ratio mixer and to compare the measured addition proportion ψ with a set addition proportion ψ 0 If |ψ - ψ 0 If i is less than the predetermined value, the foam proportioner is deemed satisfactory, where ψ=v 2 /(V 1 +V 2 )。
In this embodiment, the foam proportioner is set to add the ratio ψ 0 For its own calibrated proportion, the measured addition proportion ψ obtained by measurement and calculation is compared with the set addition proportion ψ for the foam proportion mixer itself calibration 0 The foam proportioning mixer is detected when the foam proportioning mixer is not installed on fire-fighting equipment, so that the problem of complex operation caused by retesting after the foam proportioning mixer is installed on the fire-fighting equipment in the related art is solved.
The foam proportioner comprises a venturi tube 14, the flow area of the venturi tube 14 decreases and increases in the flow direction of the liquid, and one end of the venturi tube 14 in the flow direction of the liquid is used for connecting with the water inlet pipeline 9. The throat portion of the venturi 14 is provided with a foamer inlet which is connected to a foamer line 18. The pressurized water is forced to draw in the foaming agent at a negative pressure as it flows through the throat of the venturi 14. The foam proportioner also includes a proportional valve 15 connected to the foamer inlet of the venturi 14 to regulate the flow of foamer into the venturi 14.
The testing device of the foam proportioner further comprises a water supply pipeline 7, wherein the water supply pipeline 9 and the water supply pipeline 7 are connected between the inlet end and the outlet end of the water supply pipeline 7.
The testing device of the foam proportioner of the present embodiment further includes a water pump 4 and a motor 3 driving the water pump 4, the water pump 4 delivering water in the pool 1 to the water supply line 7. In some embodiments the inlet end of the water pump 4 is also provided with a filter 2. The testing device of the foam proportioner further comprises a water supply pressure detecting part 6 for detecting the pressure of the water delivered by the water pump 4 to the water supply line 7.
One end of the water inlet pipeline 9 is connected with the water supply pipeline 7, and the other end of the water inlet pipeline 9 is provided with a first detachable connection structure for connecting a foam proportion mixer to be detected. The first detachable connection structure is used for being detachably connected with the foaming agent proportion mixer to be detected.
One end of the foamer tube 18 is adapted to be connected to a foamer reservoir 19 and the other end is provided with a second detachable connection for connection to a foam proportioner. The second detachable connection structure is used for being detachably connected with the foaming agent proportion mixer to be detected.
The water inlet pipeline 9 is provided with a water inlet control valve 8, and the foaming agent pipeline 18 is provided with a foaming agent control valve 24. In some embodiments, the control device 25 is in signal connection with the water inlet control valve 8 and the foamer control valve 24, respectively, to open the water inlet control valve 8 and the foamer control valve 24 when testing the foamer mixer and to close the water inlet control valve 8 and the foamer control valve 24 after the test is completed.
As shown in fig. 2, the testing device of the foam proportioner further comprises a bearing part 26, wherein the water supply pipeline 7 and/or the foaming agent pipeline 18 are/is arranged on the bearing part 26, and wheels are arranged at the lower part of the bearing part 26. The carrier portion 26 comprises a frame structure on which the water supply line 7 and the foamer line 18 are mounted.
One end of the water supply line 7 is provided with an inlet 29 for connection to the water pump 4 and an outlet 27 for connection to the return line 21. One end of the water inlet pipe 9 and the water supply pipe 7 are connected between the inlet 29 and the outlet 27. The foamer line 18 is provided with a foamer inlet 28 for connection to a foamer reservoir 19.
In some embodiments, a foaming agent pressure detecting part 17 for detecting the foaming agent pressure is also provided in the foaming agent line 18.
The testing device of the foam proportioner further comprises a return line 21, wherein the return line 21 is communicated with the outlet end of the water supply line 7 to convey water discharged from the outlet end of the water supply line 7 to the water tank 1; and a return flow regulating valve 23 provided in the return flow line 21 to regulate the pressure and/or flow rate of water in the water supply line 7, and the pressure and flow rate of water supplied to the water supply line 7 are regulated to be identical to the water pressure and flow rate of fire fighting equipment to be installed of the foam proportioner by regulating the return flow regulating valve 23 when the test device of the foam proportioner performs a test operation.
The testing device of the foam proportion mixer further comprises a cleaning pipeline 11, the inlet end of the cleaning pipeline 11 is communicated with the water supply pipeline 7, the outlet end of the cleaning pipeline 11 is communicated with the foaming agent pipeline 18, and after the foaming agent proportion mixer is tested each time, the foaming agent pipeline 18 is cleaned by the aid of the cleaning pipeline. A purge control valve 10 is provided in the purge line 11.
The testing device of the foam proportion mixer also comprises a water supply flow detection part 5 and a backwater flow detection part 22. A water supply flow rate detecting part 5 provided in the water supply line 7 and upstream of the junction of the water inlet line 9 and the water supply line 7 to detect the water supply flow rate V of the water supply line 7 3 . A backwater flow detection part 22 is arranged at the downstream of the connection part of the water inlet pipeline 9 and the water supply pipeline 7 to detect the backwater flow V of the water supply pipeline 7 4 。
The control device 25 is respectively connected with the water supply flow detection part 5 and the backwater flow detection part 22 in a signal way and is configured to be in a range of |ψ - ψ 0 Judging V when I is larger than a preset value 1 Whether or not to be equal to V 3 -V 4 If V 1 ＝V 3 -V 4 If V, the accuracy of the water inflow amount detection part 13 is judged to be accurate 1 ≠V 3 -V 4 Then the water inflow rate detection part 13 is adjusted to make V 1 ＝V 3 -V 4 。
The testing device of the foam proportioner further comprises a foam tube 20 and a foam flow detection member 30. The foam tubing 20 is used to connect the outlet end of the foam proportioner. A foam flow rate detecting part 30 is provided in the foam piping 20 to detect the flow rate V of the foam in the foam piping 20 5 . Foam pressure sensing element 12 is also provided in foam tubing 20.
Control device 25 is in signal communication with foam flow detection assembly 30 and is configured to control the flow of foam at |ψ - ψ 0 Judging V when I is larger than a preset value 2 Whether or not to be equal to V 5 -(V 3 -V 4 ) If V 2 ＝V 5 -(V 3 -V 4 ) If V, the accuracy of the foamer flux detecting member 16 is judged to be accurate 2 ≠V 5 -(V 3 -V 4 ) Then the foamer flux detection member 16 is adjusted to V 2 ＝V 5 -(V 3 -V 4 )。
The control means 25 is further configured to control the operation of the control device at |ψ - ψ 0 When i is greater than the predetermined value and the accuracy of the inflow amount detecting part 13 and the foamer amount detecting part 16 is accurate, the mixing ratio adjusting valve 15 of the foam ratio mixer is adjusted so that |ψ - ψ 0 The i is less than a predetermined value or the foam proportioner is judged to be unacceptable.
In some embodiments, the control device 25 includes a controller and a touch screen in signal connection with the controller.
The working principle of the testing device of the foaming agent proportion mixer of the embodiment is as follows:
the motor 3 of the main control system is started to drive the water pump 4 to rotate, the water supply pressure and flow rate can be regulated to target values on the fire engine by regulating the opening of the reflux regulating valve 23 on the reflux pipeline 21, and after the main control system is stable, the water inlet control valve 8 on the water inlet pipeline 9 is opened to enable the pressure water to be dischargedFlowing into a foam proportioner to be tested. The flow values of the water supply flow rate detection part 5 on the water supply pipeline 7 and the return water flow rate detection part 22 on the return pipeline 21 are respectively V 3 And V 4 ，V 3 And V 4 The difference indirectly verifies the accuracy of the flow measurement of the self-contained inlet water flow detection part 13 of the foam proportioner.
In the case of the tested foam-to-foam mixer, the foam-to-foam-addition-ratio setpoint value ψ is fed to the control device 25 0 The water inlet control valve 8 on the water inlet pipeline 9 is opened, a small burst of pressurized water realizes negative pressure foam absorbing agent through the throat pipe of the venturi tube 14, the foam agent is absorbed into the venturi tube 14 to be premixed with the pressurized water and generate foam, the generated foam is discharged into a waste liquid pool through the foam tube 20, and the pressurized water which is shunted by the water inlet pipeline 9 through the water supply pipeline 7 flows back to the water pool 1 through the return pipeline 21.
Flow V of the foaming agent 2 Measured by the foamer flow sensing means 16 on foamer line 18 and transferred to the control means 25. Flow V of water in water inlet line 9 1 Measured by the inflow amount detecting section 13 and transmitted to the control device 25.
As shown in fig. 3, the control device 25 calculates the actual foam addition ratio ψ=v according to the programmed program 2 /(V 1 +V 2 ) By comparing the actual addition ratio of the foaming agent psi with the set value psi of the addition ratio of the foaming agent 0 To determine the accuracy of the addition of the automatic foam proportioning mixer.
If the deviation is |ψ - ψ 0 The I is between 0 and 1.0 percent, the addition precision of the automatic foam proportion mixer is considered to meet the requirement, and the automatic foam proportion mixer can be directly loaded. If the deviation is |ψ - ψ 0 When the level exceeds 1.0%, the water supply flow V detected by the water supply flow detecting means 5 and the return water flow detecting means 22 are compared with each other 3 And backwater flow V 4 Is the difference V of (2) 3 -V 4 Verifying the flow V of the water inlet flow detection part 13 1 If the difference is large, the flow coefficient of the water flow sensor needs to be adjusted on the control device 25.
If the water inflow is V 1 The flow rate is accurate, the flow rate of the foaming agent is indicatedFlow V measured by the detecting means 16 2 May be inaccurate and thus the accuracy of the foamer flux detection assembly 16 may be detected. Specifically, V is first judged 2 Whether or not to be equal to V 5 -(V 3 -V 4 ) If V 2 ＝V 5 -(V 3 -V 4 ) If V, the accuracy of the foamer flux detecting member 16 is judged to be accurate 2 ≠V 5 -(V 3 -V 4 ) Then the foamer flux detection member 16 is adjusted to V 2 ＝V 5 -(V 3 -V 4 )。
Further, at |ψ - ψ 0 When i is greater than the predetermined value and the accuracy of the inflow amount detecting part 13 and the foamer amount detecting part 16 is accurate, then it is necessary to adjust the mixing ratio adjusting valve 15 of the foam ratio mixer so that |ψ - ψ 0 The i is less than a predetermined value or the foam proportioner is judged to be unacceptable.
The foregoing is illustrative of the present application and is not to be construed as limiting thereof, but rather, any modification, equivalent replacement, improvement or the like which comes within the spirit and principles of the present application are intended to be included within the scope of the present application.
Claims (7)
1. A test device for a foam proportioning mixer configured to detect a foam proportioning mixer not installed on a fire apparatus, comprising:
a water inlet line (9) for delivering water to the foam proportioner;
a water inflow flow rate detection part (13) arranged in the water inflow pipeline (9) for detecting the flow rate V of the water conveyed by the water inflow pipeline (9) to the foam proportion mixer 1 ；
A foamer line (18) for delivering foamer to said foam proportioner;
a foaming agent flow rate detection part (16) arranged in the foaming agent pipeline (18) for detecting the flow rate V of the foaming agent delivered by the foaming agent pipeline (18) to the foam proportion mixer 2 ；
A control device (25) connected with the water inlet flow detecting component (13) and the foaming agent flow detecting component(16) Respectively, the control device (25) being configured to calculate a measured addition ratio ψ of the foaming agent introduced by the foam ratio mixer and to compare the measured addition ratio ψ with a set addition ratio ψ 0 If |ψ - ψ 0 If i is less than a predetermined value, the foam proportioner is deemed satisfactory, where ψ=v 2 /(V 1 +V 2 )，
A water supply pipeline (7), wherein the water inlet pipeline (9) and the water supply pipeline (7) are connected between an inlet end and an outlet end of the water supply pipeline (7);
a water supply flow rate detection part (5) arranged in the water supply pipeline (7) and positioned at the upstream of the connection part of the water inlet pipeline (9) and the water supply pipeline (7) so as to detect the water supply flow rate V of the water supply pipeline (7) 3 ；
A backwater flow detection part (22) arranged at the downstream of the joint of the water inlet pipeline (9) and the water supply pipeline (7) for detecting backwater flow V of the water supply pipeline (7) 4 ；
The control device (25) is respectively connected with the water supply flow detection component (5) and the backwater flow detection component (22) in a signal way and is configured to be in a range of |psi-psi 0 Judging V when I is larger than a preset value 1 Whether or not to be equal to V 3 -V 4 If V 1 ＝V 3 -V 4 If V, the accuracy of the water inflow amount detection part (13) is judged to be accurate 1 ≠V 3 -V 4 Then the inflow amount detection part (13) is adjusted to make V 1 ＝V 3 -V 4 ，
The test device further includes:
a foam conduit (20) for connecting to an outlet end of the foam proportioner;
a foam flow rate detecting part (30) arranged in the foam pipeline (20) for detecting the flow rate V of the foam in the foam pipeline (20) 5 ；
The control device (25) is in signal connection with the foam flow detection component (30) and is configured to control the flow rate of the foam at |ψ - ψ 0 Judging V when I is larger than a preset value 2 Whether or not to be equal to V 5 -(V 3 -V 4 ) If V 2 ＝V 5 -(V 3 -V 4 ) If V, the accuracy of the foamer flow rate detection member (16) is judged to be accurate 2 ≠V 5 -(V 3 -V 4 ) Then adjusting the foamer flux sensing means (16) to cause V 2 ＝V 5 -(V 3 -V 4 )。
2. The device for testing a foam proportioning mixer according to claim 1, wherein one end of the water inlet pipeline (9) is connected with the water supply pipeline (7), and the other end of the water inlet pipeline (9) is provided with a first detachable connection structure for connecting the foam proportioning mixer to be tested.
3. A testing device of a foam proportioner according to claim 1, characterized in that one end of the foamer line (18) is provided for connection to a foamer reservoir (19) and the other end is provided with a second detachable connection for connection to the foam proportioner.
4. The test device of a foam proportioning mixer according to claim 1, further comprising a carrier part (26), wherein the water supply line (7) and/or the foamer line (18) are mounted on the carrier part (26), and wherein a wheel is mounted on a lower part of the carrier part (26).
5. The testing device of a foam proportioner according to claim 1, further comprising a return line (21), said return line (21) being in communication with the outlet end of said water supply line (7) for delivering water discharged from the outlet end of the water supply line (7) to a sink (1);
and a reflux regulating valve (23) arranged in the reflux pipeline (21) for regulating the pressure and/or flow of water in the water supply pipeline (7).
6. The device for testing a foam proportioner according to claim 1, further comprising a purge line (11), an inlet end of the purge line (11) being in communication with the water supply line (7), an outlet end of the purge line (11) being in communication with the foamer line (18).
7. The test device of a foam proportioner according to any one of claims 1 to 6, wherein the control device (25) is configured to control the flow of foam at |ψ - ψ 0 When I is larger than a preset value and the accuracy of the water inflow flow detection part (13) and the foaming agent flow detection part (16) is accurate, a mixing proportion adjusting valve (15) of the foam proportion mixer is adjusted so that I psi-psi is adjusted 0 And I is smaller than a preset value or the foam proportion mixer is judged to be disqualified.
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| CN202211192837.1A CN115501522B (en) | 2022-09-28 | 2022-09-28 | Testing device of foam proportion mixer |
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| CN115501522B true CN115501522B (en) | 2023-08-15 |
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