CN208106725U - Pump inlet pressure regulating device - Google Patents
Pump inlet pressure regulating device Download PDFInfo
- Publication number
- CN208106725U CN208106725U CN201820506523.7U CN201820506523U CN208106725U CN 208106725 U CN208106725 U CN 208106725U CN 201820506523 U CN201820506523 U CN 201820506523U CN 208106725 U CN208106725 U CN 208106725U
- Authority
- CN
- China
- Prior art keywords
- vacuum pump
- pump
- switch valve
- valve
- exhaust pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The utility model relates to parallel water pump technical field, especially a kind of pump inlet pressure regulating device；Motor including vacuum pump and driving vacuum pump work, the entrance of vacuum pump is connected with exhaust pipe, and along the flow direction of gas, regulating valve and switch valve A are disposed on exhaust pipe；Branch line is connected on exhaust pipe, branch line is mounted between switch valve A and vacuum pump and is provided with switch valve B on the branch line；The utility model replaces starting and stopping vacuum pump during test by the working condition of switching a pair of switches valve A and switch valve B, avoids damaging motor because of frequent start-stop vacuum pump；In addition, by the way that regulating valve is arranged on exhaust pipe, realization flexibly controls the vacuum pump speed of exhaust, in addition the control to the vacuum pump pumpdown time, step-length is adjusted to efficiently control pump inlet pressure, convenient for the capture of water pump critical cavitation point, improves cavitation experiment result accuracy.
Description
Technical field
The utility model relates to parallel water pump technical field, especially a kind of pump inlet pressure regulating device.
Background technique
Cavitation experiment is the important content of water pump delivery inspection, and test result designs and improves to the structure of water pump, and
Water pump operation in-site installation has important directive significance.
Pump cavitation experimental test multi-pass overregulates the valve being mounted on inlet pipeline, gradually decreases the inlet pressure of pump
Value, while adjusting the valve being mounted on outlet pipeline and decreaseing beyond 3% to lift, then cavitation experiment to keep flow constant
Terminate.Therefore inlet pressure adjusting is the committed step of pump cavitation test.It during the test, need to be by adjusting pump entrance
Valve is vacuumized to reduce pump inlet pressure and make pump that cavitation occur by vacuum pump and is wanted since water pump critical cavitation is difficult to capture
It asks and reduces inlet pressure when pump is close to cavitation and adjust step-length, to improve net positive suction head testing precision.But due to valve itself
The limitation that adjusting sensitivity or the vacuum pump speed of exhaust are fixed, is difficult to capture critical cavitation point during actual tests, tries
It is low to test result accuracy, repeated effect is poor.
Summary of the invention
To adjust step-length solid in order to solve the current pump inlet pressure low, inlet pressure that adjusts that there are accuracy for the utility model
Fixed problem, and a kind of pump inlet pressure regulating device provided.
In order to achieve the above functions, technical solution provided by the utility model is：
A kind of pump inlet pressure regulating device, the motor including vacuum pump and the driving vacuum pump work are described
The entrance of vacuum pump is connected with exhaust pipe, and along the flow direction of gas, adjusting is disposed on the exhaust pipe
Valve and switch valve A；
Branch line is connected on the exhaust pipe, the branch line is mounted on the switch valve A and the vacuum
Switch valve B is provided between pump and on the branch line.
Preferably, the outlet of the vacuum pump is connected with gas-liquid separator.
Preferably, liquidometer and solenoid valve are installed on the gas-liquid separator.
Preferably, the pump inlet pressure regulating device further includes TT&C system and industrial personal computer, the TT&C system and
Between the industrial personal computer by network connection, the TT&C system respectively with switch valve A, switch valve B, liquidometer, solenoid valve, electricity
Machine and regulating valve are communicated.
The beneficial effects of the utility model are：
1, it avoids damaging motor because of frequent start-stop vacuum pump, the utility model passes through on exhaust pipe and branch line
Switch valve A and switch valve B is respectively set, by switching the working condition of a pair of switches valve A and switch valve B to replace test process
In start and stop vacuum pump；
2, by the way that regulating valve is arranged on exhaust pipe, realization flexibly controls the vacuum pump speed of exhaust, in addition pair
The control in vacuum pump pumpdown time, so that efficiently controlling pump inlet pressure adjusts step-length, convenient for water pump critical cavitation point
It captures, improves cavitation experiment result accuracy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment one；
Fig. 2 is the structural schematic diagram of embodiment two；
Fig. 3 is inlet pressure regulation flow process figure；
Fig. 4 is the structural schematic diagram that the utility model applies to cavitation experimental provision.
Specific embodiment
1 the utility model is further elaborated to attached drawing 4 with reference to the accompanying drawing：
Embodiment one：
A kind of pump inlet pressure regulating device as shown in Figure 1, including vacuum pump 1 and driving 1 work of vacuum pump
The motor 2 of work, the entrance of vacuum pump 1 are connected with exhaust pipe 3, along the flow direction of gas, successively set on exhaust pipe 3
It is equipped with regulating valve 4 and switch valve A5；It is connected with branch line 6 on exhaust pipe 3, branch line 6 is mounted on switch valve A5 and true
Switch valve B7 is provided between sky pump 1 and on branch line 6.
Embodiment two：
As shown in Fig. 2, on the basis of example 1, the pump inlet pressure regulating device of embodiment two is in vacuum pump 1
Outlet be connected with gas-liquid separator 8, liquidometer 9 and solenoid valve 10 are installed on gas-liquid separator 8, when liquidometer 9 display point
When from device liquid level deficiency, openable solenoid valve 10 carries out fluid infusion.
In addition, pump inlet pressure regulating device further includes TT&C system 11 and industrial personal computer 12, TT&C system 11 by with
Too net and industrial personal computer 12 communicate, switch valve A5, switch valve B7, liquidometer 9, solenoid valve 10, regulating valve 4 signal wire and motor
2 power supply line is respectively connected to TT&C system 11.
TT&C system 11 mainly includes several data collecting cards and signal controller.Pressure control is installed on industrial personal computer 12
Processing procedure sequence.TT&C system 11 collects the state of switch valve A5, switch valve B7, liquidometer 9, solenoid valve 10 etc. by data collecting card
Signal is simultaneously transferred to industrial personal computer 12 and is handled, and industrial personal computer 12 is again the signal of treated feedback signal passes through TT&C system 11
The switch or aperture of control card output signal control switch valve A5, switch valve B7, liquidometer 9, solenoid valve 10 etc. and motor 2
Start and stop.
Embodiment three：
The present embodiment is the utility model to be applied in the test macro of pump cavitation experiment.
As shown in figure 4, the entrance of exhaust pipe 3 is connected with the outlet of cavitation pot 13, cylinder is set to water tank 14
Top, the utility model adjusts the pressure in water tank 14, thus indirectly by the way that the air pressure in cavitation pot 13 is adjusted
Adjustment carries out the inlet pressure of the water pump to be tested 15 of cavitation experiment.Other component parts of test macro are existing in Fig. 4
Technology is no longer described one by one herein.
Fig. 3 is inlet pressure self-regulating process program flow diagram.The value of A% is greater than 0% and is less than in following steps
100%, specific regulating step is as follows：
Step 1 opens the switch valve B7 on branch line 6, closes the switch valve A5 on exhaust pipe 3；
Step 2 starts motor 2, and driving vacuum pump 1 is run, and 1 entrance of vacuum pump is communicated with the atmosphere at this time；
Step 3 after vacuum pump 1 is stable, is closed the switch valve B7 on branch line 6 and is opened after delay several seconds
Switch valve A5 on exhaust pipe 3, vacuum pump 1 vacuumize water tank 14；
Step 4 closes the switch valve A5 on exhaust pipe 3 after pump inlet pressure reaches setting operating point, is delayed several
After second, the switch valve B7 on branch line 6 is opened, the stopping of vacuum pump 1 vacuumizes water tank 14；
Step 5 repeats step 3 and step 4, until discovery exit of pump flow starts after having a declining tendency, closes and takes out
Switch valve A5 on air pipe 3 opens the switch valve B7 on branch line 6 after delay several seconds；
Regulating valve 4 on exhaust pipe 3 is opened certain aperture A% by step 6；
Step 7 closes the switch valve B7 on branch line 6 and opens the switch valve on exhaust pipe 3 after delay several seconds
A5, vacuum pump 1 vacuumize water tank 14；
Step 8, the control time that vacuumizes of vacuum pump 1 after a bit of time, close the switch valve on exhaust pipe 3
A5 opens the switch valve B7 on branch line 6 after delay several seconds；
Step 9 repeats step 7 and step 8, until cavitation occurs for water pump；
Step 10 stops motor 2, and opens all switch valve A5 and switch valve on exhaust pipe 3 and branch line 6
B7 destroys its vacuum state to 14 tonifying Qi of water tank.
4 opening value A% of regulating valve is different because of the cavitation performance of water pump 15 to be tested difference in above-mentioned steps six, pitting
Pump that can be poorer, valve opening value is answered smaller；In addition, during primary test, if valve opening given value is got in step 6
Small, then 1 pumpdown time of step 8 intermediate pump should increase.
The utility model is by the working condition of switching a pair of switches valve to replace frequent starting during cavitation experiment to stop
Only vacuum pump 1 and damage motor 2.In the case where regulating valve 4 is opened, valve B7 realization is turned off the switch and turning on the switch valve A5
Vacuum pump 1 vacuumizes water tank 14；Valve B7 is turned on the switch and turning off the switch valve A5 realizes that vacuum pump 1 stops to water tank
14 vacuumize.Meanwhile in order to avoid gas leakage occurs during valve transfer, program is provided with delay time.In addition, by taking out
Regulating valve 4 is set on air pipe 3, and realization flexibly controls 1 speed of exhaust of vacuum pump, in addition when vacuumizing to vacuum pump 1
Between control, convenient for the capture of water pump critical cavitation point, improve vapour so that efficiently controlling pump inlet pressure to be measured adjusts step-length
Corrosion test result accuracy.
Embodiment described above, only the preferred embodiments of the utility model, are not the implementation model to limit the utility model
It encloses, therefore all equivalent change or modifications done according to structure, feature and principle described in present utility model application the scope of the patents, it should all
It is included in the scope of the utility model patent application.
Claims (4)
1. a kind of pump inlet pressure regulating device, the motor including vacuum pump and the driving vacuum pump work is described true
The entrance of sky pump is connected with exhaust pipe, it is characterised in that：Along the flow direction of gas, successively set on the exhaust pipe
It is equipped with regulating valve and switch valve A；
Be connected with branch line on the exhaust pipe, the branch line be mounted on the switch valve A and the vacuum pump it
Between and the branch line on be provided with switch valve B.
2. pump inlet pressure regulating device as described in claim 1, it is characterised in that：The outlet of the vacuum pump is connected with
Gas-liquid separator.
3. pump inlet pressure regulating device as claimed in claim 2, it is characterised in that：It is equipped on the gas-liquid separator
Liquidometer and solenoid valve.
4. the pump inlet pressure regulating device as described in claims 1 to 3 any one, it is characterised in that：The water is pumped into
Mouth pressure-regulating device further includes TT&C system and industrial personal computer, passes through network between the TT&C system and the industrial personal computer and connects
It connects, the TT&C system is communicated with switch valve A, switch valve B, liquidometer, solenoid valve, motor and regulating valve respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820506523.7U CN208106725U (en) | 2018-04-10 | 2018-04-10 | Pump inlet pressure regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820506523.7U CN208106725U (en) | 2018-04-10 | 2018-04-10 | Pump inlet pressure regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208106725U true CN208106725U (en) | 2018-11-16 |
Family
ID=64120119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820506523.7U Active CN208106725U (en) | 2018-04-10 | 2018-04-10 | Pump inlet pressure regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208106725U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595609A (en) * | 2020-06-19 | 2020-08-28 | 中国计量科学研究院 | Respiratory rhythm generating device, detection system with same and detection method |
| CN113153725A (en) * | 2021-04-27 | 2021-07-23 | 厦门坤锦电子科技有限公司 | Water pump testing system and method |
-
2018
- 2018-04-10 CN CN201820506523.7U patent/CN208106725U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595609A (en) * | 2020-06-19 | 2020-08-28 | 中国计量科学研究院 | Respiratory rhythm generating device, detection system with same and detection method |
| CN113153725A (en) * | 2021-04-27 | 2021-07-23 | 厦门坤锦电子科技有限公司 | Water pump testing system and method |
| CN113153725B (en) * | 2021-04-27 | 2023-10-17 | 厦门坤锦电子科技有限公司 | Water pump testing system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208106725U (en) | Pump inlet pressure regulating device | |
| JP2007280802A5 (en) | ||
| CN106525358B (en) | Valve pressure testing system and method | |
| CN106968934A (en) | Pump cavitation surplus Auto-Test System and its method | |
| CN107246807B (en) | Efficient adjustable vacuum control method and system for power plant | |
| CN113871651A (en) | Double-water-pump heat dissipation system of fuel cell and control method | |
| CN106837934A (en) | Thermostatically controlled hydraulic hose pulse test bench | |
| CN201461354U (en) | Variable frequency regulation closed-loop control system of water pump | |
| CN113669328B (en) | Device for detecting performance of breather valve of oil tank and test method thereof | |
| WO2022111577A1 (en) | Bypass auxiliary system for closed brayton cycle heat engine system, heat engine device, and regulation method therefor | |
| CN106593843B (en) | A kind of constant pressure automatic running control method of speed electrical pumps | |
| CN206801840U (en) | Pump cavitation surplus Auto-Test System | |
| CN206488498U (en) | A kind of handpiece Water Chilling Units | |
| CN218385298U (en) | Hydrogen supply device for fuel cell engine | |
| CN202383219U (en) | Service life test bench of multi-turn valve electric device | |
| CN218542331U (en) | Control system for bypass regulating valve of steam turbine | |
| CN218035655U (en) | Steam thermal state test device for valve | |
| CN217300820U (en) | Energy-saving steam compressor test device | |
| CN107121996B (en) | Constant temperature and humidity control device and control method | |
| CN209856030U (en) | Vacuum drying equipment, vacuumizing device and control device thereof | |
| CN115692782A (en) | Hydrogen gas supply device for fuel cell engine | |
| CN108760464A (en) | A kind of method and device for realizing the control of fuel tank positive/negative pressure alternation | |
| KR950027119A (en) | Atmospheric pressure water supply | |
| CN219061965U (en) | Water vapor compressor test device | |
| CN220696541U (en) | Water tank stirring system of water efficiency performance test board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |