CN207879563U - A kind of housing structure of reciprocating pump - Google Patents
A kind of housing structure of reciprocating pump Download PDFInfo
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- CN207879563U CN207879563U CN201721921931.0U CN201721921931U CN207879563U CN 207879563 U CN207879563 U CN 207879563U CN 201721921931 U CN201721921931 U CN 201721921931U CN 207879563 U CN207879563 U CN 207879563U
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- cylinder body
- air inlet
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Abstract
The utility model discloses a kind of housing structures of reciprocating pump, including cylinder, be arranged cylinder upper end upper cylinder body, the lower cylinder body in cylinder lower end, the air inlet pipe for sucking gas and the exhaust pipe for cylinder to be discharged are set, it is provided with air cavity in the cylinder, it is provided with piston and stopper rod in the air cavity, the piston is socketed on stopper rod and is slid with air cavity and connected, and the stopper rod extends downwardly and run through the bottom surface that lower cylinder body deviates from cylinder；The first air inlet duct, first row air drain are provided in the upper cylinder；The second air inlet duct, second row air drain are provided in the lower cylinder body.It is provided in first air inlet duct and flows into the first check valve of air cavity for supplied gas；It is provided in second air inlet duct and flows into the second check valve of air cavity for supplied gas；The third check valve that air cavity is discharged for supplied gas is provided in first row air drain；The 4th check valve that air cavity is discharged for supplied gas is provided in second row air drain.
Description
Technical field
The utility model is related to reciprocating pump field, more particularly to a kind of housing structure of reciprocating pump.
Background technology
Reciprocating pump be by piston, plunger or diaphragm moved back and forth in pumping cylinder so that cylinder in swept volume alternately increase and
It reduces to convey liquid or be allowed to the positive displacement pump being pressurized.
Currently, notification number be CN2533291Y Chinese patent disclose a kind of reciprocating pump, it include electric reciprocating device,
Fluid cylinder and the executive component being set in fluid cylinder, the output end of electric reciprocating device are connected to the input terminal of executive component.Fluid cylinder
Liquid outlet and inlet be respectively communicated in outlet tube and inlet tube, be respectively equipped in the outlet tube and inlet tube liquid valve and into
Liquid valve.When going out liquid, executive component is pushed ahead, and liquid valve is opened, and liquid feed valve is closed, and the liquid in fluid cylinder is discharged through outlet tube；
When feed liquor, executive component is moved back, and liquid valve is closed, and liquid feed valve is opened, and liquid sucks fluid cylinder through inlet tube.
Although the fluid cylinder of this reciprocating pump can by the reciprocating motion of executive component, to suck and be discharged fluid,
When sucking fluid, fluid cannot be discharged in fluid cylinder, and when fluid is discharged, and fluid cylinder can not suck fluid, and working efficiency is relatively low.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of reciprocating pump housing structure,
It can be carried out at the same time sucking fluid and discharge fluid, there is higher working efficiency.
The above-mentioned technical purpose of the utility model technical scheme is that：A kind of cylinder body of reciprocating pump
Structure, including cylinder, be arranged cylinder upper end upper cylinder body, be arranged cylinder lower end lower cylinder body, for suck gas into
Tracheae and exhaust pipe for cylinder to be discharged are provided with air cavity in the cylinder, piston and stopper rod, institute are provided in the air cavity
It states piston to be socketed on stopper rod and slide connection with air cavity, the stopper rod extends downwardly and run through the bottom that lower cylinder body deviates from cylinder
Face；The first air inlet duct for being connected with air inlet pipe, first for being connected with exhaust pipe are provided in the upper cylinder body
Air discharge duct；The second air inlet duct for being connected with air inlet pipe is provided in the lower cylinder body, for what is be connected with exhaust pipe
Second row air drain；
The first slot for being connected with air cavity, first slot are provided through on the internal groove side wall of first air inlet duct
Notch at be provided with the first check valve, the gas that first check valve is used to limit in air cavity flows to the first air inlet duct；
The second slot for being connected with air cavity, second slot are provided through on the internal groove side wall of second air inlet duct
Notch at be provided with the second check valve, the gas that second check valve is used to limit in air cavity flows to the second air inlet duct；
The third slot for being connected with air cavity, the third slot are provided through on the internal groove side wall of the first row air drain
Notch at be provided with third check valve, the third check valve flows to the gas of first row air drain for one-way conduction from air cavity
Body；
The 4th slot for being connected with air cavity, the 4th slot are provided through on the internal groove side wall of the second row air drain
Notch at be provided with the 4th check valve, the 4th check valve flows to the gas of second row air drain for one-way conduction from air cavity
Body.
Through the above technical solutions, when driving stopper rod band piston is moved towards upper cylinder body, the cut-off of the first check valve, second
Check valve is connected, the conducting of third check valve, the cut-off of the 4th check valve, and pumped gas flows to the second air inlet duct from air inlet pipe, then
Entered in cylinder by the second check valve；Gas in cylinder is flowed to through third check valve in first row air drain, then by row
Tracheae is discharged.When driving stopper rod band piston is moved towards lower cylinder body, the conducting of the first check valve, the cut-off of the second check valve, third
Check valve ends, and the conducting of the 4th check valve, pumped gas flows to the first air inlet duct from air inlet pipe, then by the first check valve into
Enter in cylinder；Gas in cylinder is flowed to through the 4th check valve in exhaust pipe, is then discharged through exhaust pipe.
Preferably, the air inlet pipe is in charge of including the first supervisor, first, second is in charge of, and described first is in charge of, second is in charge of
It is connected respectively with the same nozzle of the first supervisor, described first, which is in charge of the end being responsible for away from first, is connected to upper cylinder half body sidewall,
And it is connected with the first air inlet duct；Described second is in charge of and is connected to the side wall of lower cylinder body away from the end of the first supervisor, and with the
Two air inlet ducts are connected.
Through the above technical solutions, first is in charge of, second be in charge of can be by the gas distribution of the first supervisor to the first air inlet
Slot, the second air inlet duct are connected, it will be able to which gas is inputted the first air inlet so an admission line is only needed to be responsible for second
In slot, the second air inlet duct, be conducive to cost-effective.
Preferably, the exhaust pipe includes the second supervisor, third is in charge of, the 4th is in charge of, and the third is in charge of, the 4th is in charge of
It is connected respectively with the same nozzle of the second supervisor, the third is in charge of is connected to upper cylinder half body sidewall away from the end of the second supervisor,
And it is connected with first row air drain；Described second is in charge of and is connected to the side wall of lower cylinder body away from the end of the second supervisor, and with the
Two air discharge ducts are connected.
Through the above technical solutions, third is in charge of, the 4th be in charge of can be by the gas in first row air drain, second row air drain
The second supervisor is converged to, is connected so an outlet pipe is only needed to be responsible for second, it will be able to first row air drain, second be discharged
Gas in air discharge duct is conducive to cost-effective.
Preferably, described first to be in charge of with upper cylinder body, the second connection being in charge of with lower cylinder body be flanged joint.
Through the above technical solutions, when air inlet pipe is got rusty, user can dismantle air inlet pipe from upper cylinder body, lower cylinder body
And replace, and flanged joint convenient disassembly, intensity are high, good airproof performance.
Preferably, it is flanged joint that the third, which is in charge of with lower cylinder body, the 4th connection being in charge of with lower cylinder body,.
Through the above technical solutions, when escape pipe gets rusty, user can dismantle escape pipe from upper cylinder body, lower cylinder body
And replace, and flanged joint convenient disassembly, intensity are high, good airproof performance.
Preferably, the end face of the upper cylinder body is provided through connecting hole, and the connecting hole internal thread is connected with abutting column,
The abutting column passes through connecting hole to offset with simultaneously the first unidirectional valve face, and the first check valve is pressed on to the notch of the first slot
Place.
Through the above technical solutions, when needing to fix the first check valve, abuts column and pass through connecting hole and the first check valve
End face offsets, and then the first check valve is pressed at the notch of the first slot, and air cavity is flowed to the first air inlet duct of one-way conduction
Gas.
Preferably, second cylinder for abutting column and including the first cylinder, being connected with the first cylinder, first cylinder are used
It offsets in the end face with the first check valve；The external screw thread for abutting column is located on the second cylinder lateral wall, is used for and connecting hole
It is threadedly coupled.
Through the above technical solutions, being provided with external screw thread on only the second cylinder, there is no screw thread on the first cylinder, be conducive to
It reduces and abuts the time that column is removed from upper cylinder body；When needing to dismantle abutting column from upper cylinder body, first rotation abuts column to deviate from
Upper cylinder body moves so that the second cylinder is disconnected hole, then can directly extract the first cylinder out of connecting hole out.
Preferably, restraining position ring block is set on the lateral wall of second cylinder, and the spacing ring is for the top with upper cylinder body
Face contradicts, and abut column with limitation moves towards the first check valve.
Through the above technical solutions, during abutting column screw-in connecting hole, the top surface of spacing ring and upper cylinder body contradicts, with
Limitation abuts column and is moved further towards the first check valve, and abutting column with limitation is applied to the pressure on the first check valve, in turn
Reduce the possibility that the first check valve is subject to crushing.
Preferably, abutment ring is provided at the upper end aperture of the connecting hole, the abutment ring with spacing ring for abutting.
Through the above technical solutions, abutment ring protrudes from the top surface of upper cylinder body, directly contradicted with spacing ring instead of upper cylinder body,
To reduce the possibility of upper cylinder body top surface deformation.
Preferably, connecting tube, the connecting tube and the second cylinder lateral wall spiral shell are equipped at the lower end aperture of the connecting hole
Line connects.
Through the above technical solutions, increasing the length of the second cylinder threaded connection, the steady of threaded connection is advantageously ensured that
It is qualitative；In addition, the inner tubal wall of connecting tube can be contradicted with the lateral wall of the second cylinder, it is single to guide the second cylinder to be connected to first
To the end face center of valve.
In conclusion the utility model having the beneficial effect that in contrast to the prior art：
1, by the way that the first check valve, the second check valve, third check valve, the 4th check valve is arranged so that piston reciprocating is transported
Air inlet and exhaust are carried out at the same time when dynamic, improve the working efficiency of reciprocating pump；
2, by the way that air inlet pipe is arranged, to shunt the gas of an admission line, the cost of pipeline connection is reduced；
3, by setting escape pipe, the gas of first row air drain, second row air drain is converged on an outlet pipe,
To reduce the cost of pipeline connection.
Description of the drawings
Fig. 1 is the sectional view of embodiment, the internal structure for emphasis displaying embodiment；
Fig. 2 is the structural schematic diagram of embodiment, for emphasis displaying air inlet pipe and exhaust pipe；
Fig. 3 is the portions the A enlarged drawing of Fig. 1, and column is abutted for emphasis displaying.
Reference numeral：1, cylinder；2, upper cylinder body；3, lower cylinder body；4, air inlet pipe；41, the first supervisor；42, first is in charge of；
43, second is in charge of；5, exhaust pipe；51, the second supervisor；52, third is in charge of；53, the 4th is in charge of；6, air cavity；7, the first air inlet duct；
8, first row air drain；9, the second air inlet duct；10, second row air drain；11, the first check valve；12, the second check valve；13, third list
To valve；14, the 4th check valve；15, connecting hole；16, column is abutted；161, the first cylinder；162, the second cylinder；17, spacing ring；
18, abutment ring；19, connecting tube；20, piston；21, stopper rod；22, the first slot；23, the second slot；24, third slot；25, the 4th slot.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing.
Referring to Fig. 1, a kind of housing structure of reciprocating pump, including cylinder 1, upper cylinder body 2, lower cylinder body 3, be used for and admission line
The air inlet pipe 4 being connected, the exhaust pipe 5 for being connected with discharge duct, upper cylinder body 2 are arranged in the upper end of cylinder 1, lower cylinder body
3 are arranged in the lower end of cylinder 1.
It is provided with air cavity 6 in cylinder 1, piston 20 and stopper rod 21 are provided in air cavity 6, under stopper rod 21 extends downwardly and runs through
Cylinder body 3 deviates from the end face of cylinder 1；Piston 20 is socketed in the lateral wall of stopper rod 21, and slides and connect with air cavity 6.It is set in upper cylinder body 2
It is equipped with the first air inlet duct 7, first row air drain 8, the first air inlet duct 7 is isolated with first row air drain 8.
First air inlet duct 7 is connected with air inlet pipe 4, be provided through on the internal groove side wall of the first air inlet duct 7 for air cavity 6
The first slot 22 being connected.First row air drain 8 is connected with exhaust pipe 5, and use is provided through on the internal groove side wall of first row air drain 8
In the third slot 24 being connected with air cavity 6.
The second air inlet duct 9, second row air drain 10 are provided in lower cylinder body 3, the second air inlet duct 9 is separated by with second row air drain 10
From.Second air inlet duct 9 is connected with air inlet pipe 4, is provided through on the internal groove side wall of the second air inlet duct 9 for being connected with air cavity 6
The second logical slot 23.Second row air drain 10 is connected with exhaust pipe 5, is provided through and is used on the internal groove side wall of first row air drain 8
The 4th slot 25 being connected with air cavity 6.
First slot 22, the second slot 23, third slot 24, the 4th slot 25 notch at be respectively arranged with the first check valve 11,
Two check valves 12, third check valve 13, the 4th check valve 14.When driving stopper rod 21 is moved with piston 20 towards upper cylinder body 2, the
One check valve 11 end, the second check valve 12 conducting, third check valve 13 be connected, the 4th check valve 14 cut-off, pumped gas from
Air inlet pipe 4 flows to the second air inlet duct 9, is then entered in cylinder 1 by the second check valve 12；Gas in cylinder 1 is through third list
It is flowed in first row air drain 8 to valve 13, then passes through exhaust pipe 5 and be discharged.Stopper rod 21 is driven to be transported towards lower cylinder body 3 with piston 20
When dynamic, the first check valve 11 conducting, the second check valve 12 ends, and third check valve 13 ends, and the conducting of the 4th check valve 14 is taken out
Gas flows to the first air inlet duct 7 from air inlet pipe 4, is then entered in cylinder 1 by the first check valve 11；Gas warp in cylinder 1
4th check valve 14 flows in exhaust pipe 5, is then discharged through exhaust pipe 5.
Referring to Fig. 1 and Fig. 2, air inlet pipe 4 is in charge of 42, second including the first supervisor 41, first and is in charge of 43, and first is in charge of 42
One end and 2 flanged joint of upper cylinder body, the other end are connected with the first supervisor 41；Second is in charge of 43 one end and 3 flanged joint of lower cylinder body,
The other end is connected with the first supervisor 41；And first, which is in charge of 42, second, is in charge of at the same nozzle of 43 connections first supervisor 41.
Exhaust pipe 5 is in charge of the 52, the 4th and is in charge of 53 including the second supervisor 51, third, and third is in charge of 52 one end and upper cylinder body 2
Flanged joint, the other end are connected with the second supervisor 51；4th is in charge of 53 one end and 3 flanged joint of lower cylinder body, the other end and second
Supervisor 51 is connected；And third is in charge of the 52, the 4th and is in charge of at the same nozzle of 53 connections second supervisor 51.
Referring to Fig. 1 and Fig. 3, the top surface of upper cylinder body 2 is provided through connecting hole 15, connecting hole 15 and 7 phase of the first air inlet duct
Connection.15 internal thread of connecting hole, which is connected with, abuts column 16, abut column 16 stretch into the first air inlet duct 7 and with the first check valve 11
End face abuts, and the first check valve 11 is pressed on to the notch of the first slot 22.It abuts and restraining position ring block is set on the lateral wall of column 16
17, abut during column 16 screws in connecting hole 15, the top surface of spacing ring 17 and upper cylinder body 2 contradicts, with limitation abut column 16 into
One step is moved towards the first check valve 11, and abutting column 16 with limitation is applied to the pressure on the first check valve 11, and then reduces the
The possibility that one check valve 11 is subject to crushing.
Abutment ring 18 is provided at the upper end aperture of connecting hole 15, abutment ring 18 protrudes from the top surface of upper cylinder body 2, instead of upper
Cylinder body 2 is directly contradicted with spacing ring 17, to reduce the possibility of 2 top surface deformation of upper cylinder body.
It is provided with connecting tube 19 at the lower end aperture of connecting hole 15, connecting tube 19 is located in the first air inlet duct 7 and towards the
One check valve 11 extends；The inner tubal wall of connecting tube 19 and abut column 16 lateral wall be threadedly coupled so that abut column 16 simultaneously with
Connecting hole 15, connecting tube 19 inner tubal wall be threadedly coupled, to lengthen the length for abutting column 16 and being threadedly coupled, advantageously ensure that spiral shell
The stability of line connection.
It includes the first cylinder 161, the second cylinder 162, the end phase of the first cylinder 161 and the second cylinder 162 to abut column 16
Even, and the first cylinder 161 is overlapped with the axial line of the second cylinder 162；The external screw thread for abutting column 16 is located at the second cylinder 162
Lateral wall is threadedly coupled for connecting hole 15；There is no screw thread on first cylinder 161, and the outer diameter of the first cylinder 161 is less than the
Two cylinders 162.
It is provided with external screw thread on only the second cylinder 162, does not have screw thread on the first cylinder 161, advantageously reduces abutting column
16 times removed from upper cylinder body 2；When needing to dismantle abutting column 16 from upper cylinder body 2, it is upper to deviate to abut column 16 for first rotation
Cylinder body 2 moves so that the second cylinder 162 is disconnected hole 15, then can directly take out the first cylinder 161 out of connecting hole 15
Go out.
The above is only the exemplary embodiment of the utility model, the protection model rather than limited the present invention
It encloses, the scope of protection of the utility model is determined by the attached claims.
Claims (10)
1. a kind of housing structure of reciprocating pump, including cylinder (1), setting cylinder (1) upper end upper cylinder body (2), be arranged in gas
The lower cylinder body (3) of cylinder (1) lower end, the air inlet pipe (4) for sucking gas and the exhaust pipe (5) for cylinder (1) to be discharged, it is special
Sign is：It is provided with air cavity (6) in the cylinder (1), piston (20) and stopper rod (21), the work are provided in the air cavity (6)
Plug (20) is socketed on stopper rod (21) and is slid with air cavity (6) and connected, and the stopper rod (21) extends downwardly and runs through lower cylinder body (3)
Bottom surface away from cylinder (1)；Interior the first air inlet duct (7) being provided with for being connected with air inlet pipe (4) of the upper cylinder body (2),
First row air drain (8) for being connected with exhaust pipe (5)；It is provided in the lower cylinder body (3) for being connected with air inlet pipe (4)
Logical the second air inlet duct (9), the second row air drain (10) for being connected with exhaust pipe (5)；
The first slot (22) for being connected with air cavity (6) is provided through on the internal groove side wall of first air inlet duct (7), it is described
The first check valve (11) is provided at the notch of first slot (22), first check valve (11) is for limiting in air cavity (6)
Gas flows to the first air inlet duct (7)；
The second slot (23) for being connected with air cavity (6) is provided through on the internal groove side wall of second air inlet duct (9), it is described
The second check valve (12) is provided at the notch of second slot (23), second check valve (12) is for limiting in air cavity (6)
Gas flows to the second air inlet duct (9)；
The third slot (24) for being connected with air cavity (6) is provided through on the internal groove side wall of the first row air drain (8), it is described
Third check valve (13) is provided at the notch of third slot (24), the third check valve (13) is used for one-way conduction from air cavity
(6) gas of first row air drain (8) is flowed to；
The 4th slot (25) for being connected with air cavity (6), institute are provided through on the internal groove side wall of the second row air drain (10)
It states and is provided with the 4th check valve (14) at the notch of the 4th slot (25), the 4th check valve (14) is used for one-way conduction from air cavity
(6) gas of second row air drain (10) is flowed to.
2. a kind of housing structure of reciprocating pump according to claim 1, it is characterized in that：The air inlet pipe (4) includes first
Supervisor (41), first are in charge of (42), second are in charge of (43), described first be in charge of (42), second be in charge of (43) respectively with the first master
The same nozzle for managing (41) is connected, and described first is in charge of (42) is connected to upper cylinder body (2) side away from the end of the first supervisor (41)
Wall, and be connected with the first air inlet duct (7)；Described second is in charge of (43) is connected to lower cylinder body away from the end of the first supervisor (41)
(3) side wall, and be connected with the second air inlet duct (9).
3. a kind of housing structure of reciprocating pump according to claim 2, it is characterized in that：The exhaust pipe (5) includes second
Supervisor (51), third are in charge of (52), the 4th are in charge of (53), the third be in charge of (52), the 4th be in charge of (53) respectively with the second master
The same nozzle for managing (51) is connected, and the third is in charge of (52) and is connected to upper cylinder body (2) side away from the end of the second supervisor (51)
Wall, and be connected with first row air drain (8)；Described second is in charge of (43) is connected to lower cylinder body away from the end of the second supervisor (51)
(3) side wall, and be connected with second row air drain (10).
4. a kind of housing structure of reciprocating pump according to claim 3, it is characterized in that：Described first is in charge of (42) and upper cylinder half
Body (2), the second connection for being in charge of (43) and lower cylinder body (3) are flanged joint.
5. a kind of housing structure of reciprocating pump according to claim 4, it is characterized in that：The third is in charge of (52) and lower cylinder
Body (3), the 4th connection for being in charge of (53) and lower cylinder body (3) are flanged joint.
6. a kind of housing structure of reciprocating pump according to claim 1, it is characterized in that：The end face of the upper cylinder body (2) is passed through
It wears and is equipped with connecting hole (15), connecting hole (15) internal thread, which is connected with, abuts column (16), and the abutting column (16), which passes through, to be connected
Connect hole (15) with and the first check valve (11) end face offset, the first check valve (11) is pressed on to the notch of the first slot (22)
Place.
7. a kind of housing structure of reciprocating pump according to claim 6, it is characterized in that：The abutting column (16) includes first
Cylinder (161), the second cylinder (162) being connected with the first cylinder (161), first cylinder (161) are used for first unidirectionally
The end face of valve (11) offsets；The external screw thread for abutting column (16) is located on the second cylinder (162) lateral wall, is used for and connecting hole
(15) it is threadedly coupled.
8. a kind of housing structure of reciprocating pump according to claim 7, it is characterized in that：Outside second cylinder (162)
Restraining position ring block (17) is set on side wall, and the spacing ring (17) is used to contradict with the top surface of upper cylinder body (2), to limit abutting column
(16) it is moved towards the first check valve (11).
9. a kind of housing structure of reciprocating pump according to claim 8, it is characterized in that：The upper end hole of the connecting hole (15)
Abutment ring (18) is provided at mouthful, the abutment ring (18) with spacing ring (17) for abutting.
10. a kind of housing structure of reciprocating pump according to claim 9, it is characterized in that：The lower end of the connecting hole (15)
Connecting tube (19) is equipped at aperture, the connecting tube (19) is threadedly coupled with the second cylinder (162) lateral wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721921931.0U CN207879563U (en) | 2017-12-30 | 2017-12-30 | A kind of housing structure of reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721921931.0U CN207879563U (en) | 2017-12-30 | 2017-12-30 | A kind of housing structure of reciprocating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207879563U true CN207879563U (en) | 2018-09-18 |
Family
ID=63506201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721921931.0U Expired - Fee Related CN207879563U (en) | 2017-12-30 | 2017-12-30 | A kind of housing structure of reciprocating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207879563U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113638870A (en) * | 2021-08-31 | 2021-11-12 | 陈宇航 | Diaphragm vacuum pump |
-
2017
- 2017-12-30 CN CN201721921931.0U patent/CN207879563U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113638870A (en) * | 2021-08-31 | 2021-11-12 | 陈宇航 | Diaphragm vacuum pump |
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| 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: 20180918 Termination date: 20201230 |