CN208907402U - Exempt from diversion pump group pumping system - Google Patents
Exempt from diversion pump group pumping system Download PDFInfo
- Publication number
- CN208907402U CN208907402U CN201821774357.5U CN201821774357U CN208907402U CN 208907402 U CN208907402 U CN 208907402U CN 201821774357 U CN201821774357 U CN 201821774357U CN 208907402 U CN208907402 U CN 208907402U
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- Prior art keywords
- relay
- valve
- normally opened
- opened contact
- centrifugal pump
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- Expired - Fee Related
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- 238000005086 pumping Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000005119 centrifugation Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000037452 priming Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to be centrifuged pump technical field, and in particular to one kind exempts from diversion pump group pumping system.Including drainage tank, suction hose and drainpipe are connected on diversion pot sidewall, suction hose is mounted on outside drainage tank, it is connect by elbow with the top of diversion pot sidewall, drainpipe is connect with the bottom end of diversion pot sidewall, it drains tube end and connects centrifugal pump A, the output end connecting conveying pipe road of centrifugal pump A, valve A is provided on transfer pipeline, transfer pipeline end is connected with two branch pipes, valve B and valve D is respectively set on two branch pipes, two branch tube ends are all connected with aqueduct, centrifugal pump B is set on one aqueduct, centrifugal pump C is set on another aqueduct, centrifugal pump B, valve C and valve E are set on pipeline between centrifugal pump C and branch pipe respectively.After drainage tank is full of water, later centrifugal pump driving and parking can provide diversion to other centrifugal pumps in pump group without to centrifugation pump priming, making to pour water simple and easy again, realize automation and draw water.
Description
Technical field
The utility model relates to be centrifuged pump technical field, and in particular to one kind exempts from diversion pump group pumping system.
Background technique
Centrifugal pump is generally driven by motor, before starting pump, the liquid that is full of in the pump housing, that is, suction line.When impeller height
When speed rotation, impeller drives interlobate liquid to rotate together, and due to the effect of centrifugal force, liquid is thrown toward leaf from impeller center
It takes turns outer rim (flow velocity can increase to 15~25m/s), kinetic energy is consequently increased.After liquid enters pump case, due to volute shaped pump casing
In runner be gradually expanded, flow rate of liquid gradually decreases, and a part of kinetic energy is changed into static energy, and then liquid is with higher pressure
It is flowed out along outlet.At the same time, certain vacuum is formed since liquid is thrown out of at impeller center, and the pressure at liquid level
Pa is higher than impeller center place, and therefore, the liquid of suction line enters in pump under differential pressure action.Impeller does not stop to rotate, liquid
Also it is continuously inhaled into and extrudes.Since why centrifugal pump can convey liquid, mainly by the effect of centrifugal force, therefore claim
For centrifugal pump.
Centrifugal pump in the running, if leaking into air hydraulically full in pump, or during operation in pump, due to
Atmospheric density is more much smaller than fluid density, and the centrifugal force generated in impeller rotation is also small, prevents at suction inlet from being formed enough
Vacuum degree, draw liquid into pump, at this moment, although wheel rotation, liquid cannot be conveyed, this phenomenon is known as " air sinuses ".
In order to avoid the generation of " air sinuses ", it is necessary to will be hydraulically full in the pump housing and suction line and drain sky before each starting pump
Gas.
The normal mounting if being higher than centrifugal pump inlet horizontal plane by the liquid level of conveying liquid, centrifugal pump can be transported normally
Row.To make centrifugal pump body and entrance pipe before starting centrifugal pump if being lower than centrifugal pump inlet by conveying liquid levels
It is hydraulically full so as to form enough vacuum degrees at suction inlet, centrifugal pump could operate normally conveying material.
Tradition makes hydraulically full at centrifugal pump inlet mainly to take following methods:
It is centrifuged at Pump Suction Nozzle and check (non-return) valve is installed, liquid then is added in the liquid outlet of centrifugal pump, is then shut off and adds
Fluid valve starts centrifugal pump.This method makes liquid need certain time full of suction line and the pump housing, while also being sealed by bottom valve
Degree influence has certain filling time, and whether it is full of and also has no way of observing, it is sometimes desirable to which repeatedly filling could be opened normally
It is dynamic.The problems such as adding water if it is opening wide, having waste, the influence environmental sanitation of water, exists.
Utility model content
According to the above-mentioned deficiencies in the prior art, exempt from diversion pump group the purpose of the utility model is to provide one kind and draw water be
System, after drainage tank is full of water, later centrifugal pump driving and parking is not necessarily to make centrifugal pump pour water simple and easy centrifugation pump priming again,
It is easy to operate, and diversion can be provided to other centrifugal pumps in pump group, it realizes automation and draws water.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
Described exempts from diversion pump group pumping system, including drainage tank, is connected with suction hose and drainpipe on diversion pot sidewall,
Suction hose is mounted on outside drainage tank, is connect by elbow with the top of diversion pot sidewall, the bottom of drainpipe and diversion pot sidewall
End connection, draining tube end connect centrifugal pump A, and the output end connecting conveying pipe road of centrifugal pump A is provided with valve on transfer pipeline
Door A, transfer pipeline end are connected with two branch pipes, valve B and valve D are respectively set on two branch pipes, two branch tube ends are equal
Aqueduct is connected, centrifugal pump B is set on an aqueduct, centrifugal pump C, centrifugal pump B, centrifugal pump C are set on another aqueduct
Valve C and valve E are set on pipeline between branch pipe respectively.
Wherein:
The suction hose is integrated with elbow welding.
Fluid level indicator is set on the drainage tank.
Water filling port is set on the drainage tank, and water filling port is connected with water injection pipe, and Fill control valves are arranged on water injection pipe.
The pumping system further includes control device, and control device includes relay A, after time relay B, relay
C, relay D, relay E, relay F, selection switch A, select switch B, not self-lock switch, diode, valve A, valve B,
Valve C, valve D, valve E are electrically operated valve；
The one end relay A is connected to diode cathode and first normally opened contact and time relay by relay A
The normally-closed contact of device B is connected to positive pole, and diode anode is connected to power cathode, valve A, valve by not self-lock switch
B, valve C, valve D, valve E control terminal pass through second normally opened contact of relay A, third normally opened contact, respectively
Four normally opened contacts, the 5th normally opened contact, the 6th normally opened contact are connected to power supply, and the power end of centrifugal pump A passes through the 7th
A normally opened contact is connected to power supply, and the coil other end of relay A is connected to power cathode；
Positive pole is connected to by not self-lock switch after coil one end of time relay B, after the line of time relay B
The circle other end is connected to power cathode, is connected to anode, other end difference after first normally opened contact one end of time relay B
It is connected to the coil and first normally opened contact of relay C, the coil other end of relay C is connected to power cathode, relay C
The normally opened contact other end positive pole is connected to by the normally-closed contact of relay D；Second after time relay B is normally opened
Contact one end is connected to positive pole, and second normally opened contact other end after time relay B is connected respectively to relay E's
Coil one end and first normally opened contact one end, the relay E coil other end are connected to power cathode, and first of relay E
The normally opened contact other end is connected to positive pole by the normally-closed contact of relay F；
Second normally opened contact one end of relay C is connected to the control terminal of valve C, the normally opened touching of third of relay C
Point one end is connected to power cathode, second normally opened contact and the third normally opened touching of relay C by the power end of centrifugal pump B
The point other end is by selecting switch A to be connected to positive pole；
Coil one end of relay D is connected to positive pole, the coil other end connection of relay D by not self-lock switch
To power cathode；
Second normally opened contact one end of relay E is connected to the control terminal of valve E, the normally opened touching of third of relay E
Point one end is connected to power cathode, second normally opened contact and the third normally opened touching of relay E by the power end of centrifugal pump C
The point other end is by selecting switch B to be connected to positive pole；
Coil one end of relay F is connected to positive pole, the coil other end connection of relay F by not self-lock switch
To power cathode.
Operation principle and process:
So that water is entered drainage tank in use, being first turned on Fill control valves, when liquid level is close to suction hose, closes water filling control
Valve.Valve A-E is opened, centrifugal pump A is opened, then restarts centrifugal pump B and centrifugal pump C, closes valve A and centrifugal pump A, is used
Centrifugal pump B and centrifugal pump C supplies water.
When reusing, without being filled the water to drainage tank, directly repeat the above steps.The liquid level that fluid level indicator is shown
When lower than drainpipe, intake again to drainage tank.
It by selection switch A and selection switch B selection is supplied by centrifugal pump B, centrifugal pump C or centrifugal pump B and centrifugal pump C
Water.
By taking centrifugal pump B water supply as an example:
(1) closure selection switch A, the water supply junior unit for constituting relay C and relay D have the condition of water supply；
(2) not self-lock switch is pressed, the coil of relay A obtains electric, all normally opened contacts closure of relay A；Relay A
First normally opened contact closure, so that the coil of relay A is powered always, relay A is remained closed, valve A, valve B, valve
C, valve D, valve E are opened simultaneously, and centrifugal pump A is also opened, and the water in drainage tank are pumped into pipeline, while passing through vacuum effect,
Water in pond can be pumped into drainage tank by the suction hose of drainage tank.The water of centrifugal pump A extraction flows back into the water outlet of centrifugal pump B
Mouthful, form diversion.
(3) when pressing not self-lock switch, the coil of relay B obtain it is electric, relay B be time-delay relay, function is normal
It opens contact and normally-closed contact is delayed three seconds and acts.The normally opened contact of relay B and normally-closed contact conjugate in short-term after three seconds.Relay
The normally-closed contact of B disconnects in short-term, makes the coil losing electricity of relay A, and all normally opened contacts of relay A disconnect.Valve A, valve
B, valve D, valve E are simultaneously closed off, and centrifugal pump A also stops.Two normally opened contacts of relay B are closed in short-term, make relay C and
The water supply junior unit that relay D is constituted is started to work, the water supply junior unit working principle that relay E and relay F are constituted with after
The water supply junior unit that electric appliance C and relay D is constituted is identical, and since the disconnection of selection switch B makes it not work, this sentences relay
It is analyzed for the water supply junior unit that C and relay D is constituted.
(4) coil of relay C is connected to the normally opened contact closure of the subsequent electric appliance C of signal, first normally opened touching of relay C
Point closure so that the coil of relay C is kept as electricity, the normally opened contact of relay C remains closed, valve C obtain it is electric continue starting, from
Heart pump B starts to work, since the water outlet of centrifugal pump B pours into diversion, so centrifugal pump B can directly take out the water in pond
Out, and water supply start.
Compared with prior art, the utility model has the beneficial effects that
1, the utility model structure is simple, and rationally, after drainage tank is full of water, later centrifugal pump driving and parking is without again for design
To centrifugation pump priming, centrifugal pump is set to pour water simple and easy, it is easy to operate, and can provide and draw to the centrifugal pump of other in pump group
Water.
2, suction hose is mounted on outside drainage tank, is connect by elbow with the top of diversion pot sidewall, is reduced centrifugal pump
The inducer resistance of ducting further increases suction head and anti-cavitation ability.
3, the utility model realizes the automation control for exempting from diversion pump group pumping system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram between the utility model drainage tank and centrifugal pump A；
Fig. 2 is the top view of the utility model；
Fig. 3 is the main view of the utility model；
Fig. 4 is the structural schematic diagram of the centrifugal pump B or centrifugal pump C of the utility model；
Fig. 5 is the electrical schematic diagram of the utility model；
In figure: 1, drainage tank；2, suction hose；3, drainpipe；4, elbow；5, centrifugal pump A；6, transfer pipeline；7, valve A；
8, branch pipe；9, valve B；10, valve C；11, valve D；12, valve E；13, centrifugal pump B；14, centrifugal pump C；15, aqueduct；16,
Relay A；17, time relay B；18, relay C；19, relay D；20, relay E；21, relay F；22, selection is opened
Close A；23, switch B is selected；24, not self-lock switch；25, diode.
Specific embodiment
The embodiments of the present invention are described further with reference to the accompanying drawing:
As shown in Figs. 1-5, described to exempt from diversion pump group pumping system, including drainage tank 1, it is connected on 1 side wall of drainage tank
Suction hose 2 and drainpipe 3, suction hose 2 are mounted on outside drainage tank 1, are connect by elbow 4 with the top of 1 side wall of drainage tank, row
Water pipe 3 is connect with the bottom end of 1 side wall of drainage tank, and 3 end of drainpipe connects centrifugal pump A5, and the output end of centrifugal pump A5 connects conveying
Pipeline 6 is provided with valve A7 on transfer pipeline 6, and 6 end of transfer pipeline is connected with two branch pipes 8, on two branch pipes 8 respectively
Valve B9 and valve D11 is set, two 8 ends of branch pipe are all connected with aqueduct 15, centrifugal pump B13 are arranged on an aqueduct 15,
Centrifugal pump C14 is set on another aqueduct 15, sets valve respectively on the pipeline between centrifugal pump B13, centrifugal pump C14 and branch pipe 8
Door C10 and valve E12.
The suction hose 2 is welded as a whole with elbow 4.
Fluid level indicator is set on the drainage tank 1.
Water filling port is set on the drainage tank 1, water filling port is connected with water injection pipe, and Fill control valves are arranged on water injection pipe.
The pumping system further includes control device, control device include relay A16, after time relay B17, after
Electric appliance C18, relay D19, relay E20, relay F21, selection switch A22, selection switch B23, not self-lock switch 24, two
Pole pipe 25, valve A7, valve B9, valve C10, valve D11, valve E12 are electrically operated valve；
The one end relay A16 be connected to 25 cathode of diode and by first normally opened contact of relay A16 and when
Between the normally-closed contact of relay B17 be connected to positive pole, it is negative that 25 anode of diode by not self-lock switch 24 is connected to power supply
Pole, valve A7, valve B9, valve C10, valve D11, valve E12 control terminal pass through respectively second of relay A16 it is normally opened
Contact, third normally opened contact, the 4th normally opened contact, the 5th normally opened contact, the 6th normally opened contact are connected to power supply, from
The power end of heart pump A5 is connected to power supply by the 7th normally opened contact, and it is negative that the coil other end of relay A16 is connected to power supply
Pole；
Positive pole is connected to by not self-lock switch 24 after coil one end of time relay B17, after the time relay
The coil other end of B17 is connected to power cathode, is connected to anode after first normally opened contact one end of time relay B17,
The other end is connected respectively to the coil and first normally opened contact of relay C18, and the coil other end of relay C18 is connected to electricity
The normally opened contact other end of source cathode, relay C18 is connected to positive pole by the normally-closed contact of relay D19；After the time
Second normally opened contact one end of relay B17 is connected to positive pole, and second normally opened contact after time relay B17 is another
One end is connected respectively to coil one end and first normally opened contact one end of relay E20, the connection of the relay E20 coil other end
First normally opened contact other end to power cathode, relay E20 is being connected to power supply just by the normally-closed contact of relay F21
Pole；
Second normally opened contact one end of relay C18 is connected to the control terminal of valve C10, the third of relay C18
Normally opened contact one end is connected to power cathode, second normally opened contact of relay C18 and by the power end of centrifugal pump B13
Three normally opened contact other ends are by selecting switch A22 to be connected to positive pole；
Coil one end of relay D19 is connected to positive pole by not self-lock switch 24, and the coil of relay D19 is another
End is connected to power cathode；
Second normally opened contact one end of relay E20 is connected to the control terminal of valve E12, the third of relay E20
Normally opened contact one end is connected to power cathode, second normally opened contact of relay E20 and by the power end of centrifugal pump C14
Three normally opened contact other ends are by selecting switch B23 to be connected to positive pole；
Coil one end of relay F21 is connected to positive pole by not self-lock switch 24, and the coil of relay F21 is another
End is connected to power cathode.
So that water is entered drainage tank 1 in use, being first turned on Fill control valves, when liquid level is close to suction hose 2, closes water filling control
Valve processed.Open valve A7-E, open centrifugal pump A5, then restart centrifugal pump B13 and centrifugal pump C14, close valve A7 and from
Heart pump A5 is supplied water using centrifugal pump B13 and centrifugal pump C14.
When reusing, without being filled the water to drainage tank 1, directly repeat the above steps.The liquid that fluid level indicator is shown
When position is lower than drainpipe 3, intake again to drainage tank 1.
By selection switch A22 and selection switch B23 select be by centrifugal pump B13, centrifugal pump C14 or centrifugal pump B13 and
Centrifugal pump C14 supplies water.
By taking centrifugal pump B13 water supply as an example:
(1) closure selection switch A22, the water supply junior unit for constituting relay C18 and relay D19 have water supply
Condition；
(2) not self-lock switch 24 are pressed, the coil of relay A16 obtains electric, all normally opened contacts closure of relay A16；
First normally opened contact of relay A16 is closed, and so that the coil of relay A16 is powered always, relay A16 is remained closed, valve
Door A7, valve B9, valve C10, valve D11, valve E12 are opened simultaneously, and centrifugal pump A5 is also opened, and the water in drainage tank 1 is taken out
Enter pipeline, while by vacuum effect, the water in pond can be pumped into drainage tank 1 by the suction hose 2 of drainage tank 1.Centrifugal pump A5
The water of extraction flows back into the water outlet of centrifugal pump B13, forms diversion.
(3) when pressing not self-lock switch 24, the coil of relay B obtains electric, and relay B is time-delay relay, and function is
Normally opened contact and normally-closed contact are delayed three seconds and act.The normally opened contact of relay B and normally-closed contact conjugate in short-term after three seconds.Relay
The normally-closed contact of device B disconnects in short-term, makes the coil losing electricity of relay A16, and all normally opened contacts of relay A16 disconnect.Valve
A7, valve B9, valve D11, valve E12 are simultaneously closed off, and centrifugal pump A5 also stops.Two normally opened contacts of relay B close in short-term
It closes, makes the water supply junior unit start-up operation of relay C18 and relay D19 composition, what relay E20 and relay F21 were constituted
Water supply junior unit working principle is identical as the water supply junior unit that relay C18 and relay D19 is constituted, due to selecting switch B23
Disconnection so that it is not worked, this is analyzed for sentencing the water supply junior unit that relay C18 and relay D19 are constituted.
(4) normally opened contact that the coil of relay C18 is connected to the subsequent electric appliance C18 of signal is closed, and first of relay C18
Normally opened contact closure makes the coil of relay C18 be kept as electricity, and the normally opened contact of relay C18 remains closed, and valve C10 obtains electric
It continues starting, centrifugal pump B13 starts to work, since the water outlet of centrifugal pump B13 pours into diversion, so centrifugal pump B13 can be straight
It connects the water extraction in pond, and water supply start.
Claims (5)
1. one kind exempts from diversion pump group pumping system, including drainage tank (1), it is characterised in that: be connected with suction on drainage tank (1) side wall
Water pipe (2) and drainpipe (3), suction hose (2) are mounted on drainage tank (1) outside, pass through elbow (4) and drainage tank (1) side wall
Top connection, drainpipe (3) are connect with the bottom end of drainage tank (1) side wall, and drainpipe (3) end connects centrifugal pump A (5), centrifugation
Pump A (5) output end connecting conveying pipe road (6), be provided on transfer pipeline (6) valve A (7), transfer pipeline (6) end with
Two branch pipes (8) are connected, and valve B (9) and valve D (11) are respectively set on two branch pipes (8), two branch pipe (8) ends connect
It connects aqueduct (15), centrifugal pump B (13) is set on an aqueduct (15), centrifugal pump C is set on another aqueduct (15)
(14), valve C (10) and valve E (12) are set respectively on the pipeline between centrifugal pump B (13), centrifugal pump C (14) and branch pipe (8).
2. according to claim 1 exempt from diversion pump group pumping system, it is characterised in that: the suction hose (2) and elbow
(4) it is welded as a whole.
3. according to claim 1 exempt from diversion pump group pumping system, it is characterised in that: set liquid on the drainage tank (1)
Position indicator.
4. according to claim 1 exempt from diversion pump group pumping system, it is characterised in that: be arranged on the drainage tank (1)
Water filling port, water filling port are connected with water injection pipe, and Fill control valves are arranged on water injection pipe.
5. according to claim 1 exempt from diversion pump group pumping system, it is characterised in that: the pumping system further includes control
Device processed, control device include relay A (16), after time relay B (17), relay C (18), relay D (19), relay
Device E (20), relay F (21), selection switch A (22), selection switch B (23), not self-lock switch (24), diode (25), valve
Door A (7), valve B (9), valve C (10), valve D (11), valve E (12) are electrically operated valve；
Relay A (16) one end be connected to diode (25) cathode and by first normally opened contact of relay A (16) and
The normally-closed contact of time relay B (17) is connected to positive pole, and diode (25) anode is connected by not self-lock switch (24)
To power cathode, valve A (7), valve B (9), valve C (10), valve D (11), valve E (12) control terminal respectively by after
Second normally opened contact, third normally opened contact, the 4th normally opened contact, the 5th normally opened contact, the 6th of electric appliance A (16)
Normally opened contact is connected to power supply, and the power end of centrifugal pump A (5) is connected to power supply, relay A (16) by the 7th normally opened contact
The coil other end be connected to power cathode；
Positive pole is connected to by not self-lock switch (24) after coil one end of time relay B (17), after time relay B
(17) the coil other end is connected to power cathode, is connected to just after first normally opened contact one end of time relay B (17)
Pole, the other end are connected respectively to the coil and first normally opened contact of relay C (18), the coil other end of relay C (18)
It is connected to power cathode, the normally opened contact other end of relay C (18) is connected to power supply by the normally-closed contact of relay D (19)
Anode；It is connected to positive pole after second normally opened contact one end of time relay B (17), after time relay B's (17)
Second normally opened contact other end is connected respectively to coil one end and first normally opened contact one end of relay E (20), relay
Device E (20) coil other end is connected to power cathode, and first normally opened contact other end of relay E (20) passes through relay F
(21) normally-closed contact is connected to positive pole；
Second normally opened contact one end of relay C (18) is connected to the control terminal of (10) valve C, the third of relay C (18)
A normally opened contact one end is connected to power cathode, second normally opened touching of relay C (18) by the power end of centrifugal pump B (13)
Point and the third normally opened contact other end are by selecting switch A (22) to be connected to positive pole；
Coil one end of relay D (19) is connected to positive pole by not self-lock switch (24), and the coil of relay D (19) is another
One end is connected to power cathode；
Second normally opened contact one end of relay E (20) is connected to the control terminal of (12) valve E, the third of relay E (20)
A normally opened contact one end is connected to power cathode, second normally opened touching of relay E (20) by the power end of centrifugal pump C (14)
Point and the third normally opened contact other end are by selecting switch B (23) to be connected to positive pole；
Coil one end of relay F (21) is connected to positive pole by not self-lock switch (24), and the coil of relay F (21) is another
One end is connected to power cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821774357.5U CN208907402U (en) | 2018-10-30 | 2018-10-30 | Exempt from diversion pump group pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821774357.5U CN208907402U (en) | 2018-10-30 | 2018-10-30 | Exempt from diversion pump group pumping system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208907402U true CN208907402U (en) | 2019-05-28 |
Family
ID=66614626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821774357.5U Expired - Fee Related CN208907402U (en) | 2018-10-30 | 2018-10-30 | Exempt from diversion pump group pumping system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208907402U (en) |
-
2018
- 2018-10-30 CN CN201821774357.5U patent/CN208907402U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190528 |