CN205117641U - Liquefied natural gas transfers and uses ultra -low temperature high -pressure pump - Google Patents
Liquefied natural gas transfers and uses ultra -low temperature high -pressure pump Download PDFInfo
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- CN205117641U CN205117641U CN201520669735.3U CN201520669735U CN205117641U CN 205117641 U CN205117641 U CN 205117641U CN 201520669735 U CN201520669735 U CN 201520669735U CN 205117641 U CN205117641 U CN 205117641U
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Abstract
The utility model provides a being used for transferring liquefied natural gas's ultra -low temperature high -pressure pump and being equipped with entry (In), the axle portion of holding (a 10A), compression space (C) and inlet valve, compression space (C) is formed at the inside of cavity (10), and piston assembly (20) are equipped with piston rod and piston, and the piston rod is held with the mode that the outside of the axle portion of holding (10A) for the cavity is sealed situation, and the piston holds inside compression space, reciprocating motion is carried out with the help of the driving source of outside in piston assembly (20), and the inlet valve sets up in the entry part of cavity. Export at the cavity is provided with the poppet valve. Move and accomplish the compression back to the lower dead center at piston assembly, at the in -process that moves to the top dead center, pass between gaseous piston ring (26) and compression space's (C) in piston assembly (20) the inner wall to with the help of the piston assembly who moves to the top dead center, come to the inside guide of the entry (IN) of cavity through interface channel and recurrence route.
Description
Technical field
The utility model relates to ultra-low temperature pump, relate more specifically to, by make again the loss etc. of the LNG Liquefied natural gas for external environment condition minimize while enough high pressure transfer LNG Liquefied natural gas (LNG), form the high-pressure service pump for transferring LNG Liquefied natural gas with enough efficiencies.
Background technique
In recent years, in the face of the narrow limitation of fossil fuel and cost issues and carbon emission problem, in global range for the demand of LNG Liquefied natural gas (LNG, LiquefiedNaturalGas) and consumption in increase trend.Usually, this LNG Liquefied natural gas carries out long-distance transport by liquified natural gas carrier (LNGC), and liquified natural gas carrier (LNGC) is provided with the bin of the ultralow temperature content that can bear about-163 DEG C.
Further, as mentioned above, because this LNG Liquefied natural gas is in ultra low temperature state, therefore, after being transplanted on required place by liquified natural gas carrier (LNGC), required other place or storage containers etc. need be again shifted into.In the recent period along with the increase in demand to LNG Liquefied natural gas, propose the technology contents such as a lot of process about LNG Liquefied natural gas and transfer.Such as, Korea S's special permission discloses No. 10-2008-0010741, No. 10-2013-0039032, Korea S logs in No. 0569621, No. the 6th, 546,739, U. S. Patent etc., proposes about relevant multiple technologies such as the process of LNG Liquefied natural gas and transfers.
But, according to existing technology, in fact, the pump of LNG Liquefied natural gas can be transferred, come with some shortcomings in its efficiency and stability.Such as, in order to transfer the LNG Liquefied natural gas of ultralow temperature as above, considering the structure of the character of LNG Liquefied natural gas and bin and transfer object, high pressure mode should be adopted to supply LNG Liquefied natural gas (following, can referred to as " gas ").
Further, in order to supply LNG Liquefied natural gas in this high pressure mode, preferably, use the low pressure pump being in the state of the inside being immersed in LNG Liquefied natural gas and the high-pressure service pump be exposed on the external simultaneously.Preferably, adopt the head pressure of 12 bar (Bar) left and right in low pressure pump (Lowpressurepump), the high-pressure service pump be connected with this low pressure pump adopts the head pressure of 300 bar left and right.But, in prior art as above, think do not make this succession pump about enough technology open, especially abundant not in the efficiency of pump.
Model utility content
The purpose of this utility model is, provides the high-pressure service pump for transferring LNG Liquefied natural gas fully can guaranteeing whole efficiency.
Another object of the present utility model is, provides the high-pressure service pump that can prevent the loss because of the LNG Liquefied natural gas caused by external environment condition to greatest extent.
Further, another object of the present utility model is, provides a kind of by making the gas leaked from the piston periphery for compressing in the part extruding high pressure carry out recirculation, thus can prevent the high-pressure service pump of the loss of gas to greatest extent.
In order to solve this technical problem, the utility model provides ultralow temperature high-pressure service pump, and above-mentioned ultralow temperature high-pressure service pump comprises: described cavity is provided with entrance, axle accommodating part, compression volume and outlet, and described entrance can flow into LNG Liquefied natural gas, described axle accommodating part is formed at the opposition side of described entrance, and described compression volume is formed between described axle accommodating part and described entrance, and described outlet is formed from the side of described compression volume to radiation direction, and for discharging the LNG Liquefied natural gas after compression, piston assembly, described piston assembly is provided with piston rod and piston, described piston rod is received in the mode being airtight conditions relative to the outside of described axle accommodating part, described piston and described piston rod integrally formed, and the inner side surface being close to described compression volume slides, described piston assembly moves back and forth by the driving source of outside, suction valve, described suction valve is arranged at the inner side of the entrance of described cavity, and LNG Liquefied natural gas can be made only to pass through to compression volume, discharge body, described discharge body is provided with discharge poppet valve, spring and joint, described discharge poppet valve is provided with discharge path bottom and entrance, described discharge path bottom is can the mode of outlet of cavity described in opening and closing arrange, and externally can discharge LNG Liquefied natural gas, described entrance is formed at the side of described discharge poppet valve, and be connected with described discharge path bottom, described spring is used for carrying out elastic support to the lower surface of described discharge poppet valve, the lower surface of described discharge poppet valve is made to close described outlet, discharge path top is provided with at described joint, described discharge path top is connected with above-mentioned discharge path bottom, and on the top of described spring being that the mode of airtight conditions combines with housing relative to outside, and connecting passage and return path, described connecting passage is formed at the lower of the piston of the piston assembly in described compression volume, and be positioned at the opposition side of described outlet, wherein, described return path is for connecting the entrance of described connecting passage and cavity.In the case, in the process of described piston assembly to lower dead center movement, the making every effort to overcome the elastic force that takes spring and make described discharge poppet valve move up of LNG Liquefied natural gas of compression volume internal compression, thus make described port opening, externally can supply the LNG Liquefied natural gas after compression thus.And, in the process of above-mentioned piston assembly to top dead center movement, described gas is searched between the piston ring of piston assembly and the inwall of compression volume in Soviet Union and is passed, and by the piston to top dead center movement, is guided to the inside of the entrance of cavity by connecting passage and return path.
According to another embodiment of the present utility model, ultralow temperature high-pressure service pump of the present utility model also comprises exocoel, and described exocoel can be formed at the outer side surface of described cavity and carry out heat insulation chamber with cavity.
According to the utility model formed as mentioned above, by comprise the bracket of suction valve and the compression volume of chamber interior that forms and in compression volume with structures such as the outlets of radial formation, can efficientibility be had on the whole.This efficiency expection can realize by means of the compression of reciprocating piston assembly and the enough sealings etc. in compression volume.
Add, by circulating path of the present utility model, can make again to revert to inlet side from the LNG Liquefied natural gas of leaking between piston ring and the inwall of compression volume in the process of carrying out compressing with high pressure, this gas can flow into compression volume by the entrance (IN) of cavity again.Thus, can prevent because of the compression loss caused by this gas leakage, the stability of the transfer efficiency of overall gas can also be guaranteed simultaneously.
Further, according to the utility model, by the chamber that can be described as insulated space be formed between cavity and exocoel, the temperature impact that the external environment condition that can minimize the condition of high temperature applies.Thus, the loss of the LNG Liquefied natural gas that can prevent external environment condition from causing to greatest extent.
Accompanying drawing explanation
Fig. 1 is the sectional illustrations figure of ultralow temperature high-pressure service pump of the present utility model.
Fig. 2 is the example sectional view of hollow type bolt of the present utility model.
Fig. 3 represents suction valve of the present utility model, and wherein, the decomposing state exemplary plot that (a) is suction valve, (b) is left side view.
Fig. 4 is the exemplary plot representing joint of the present utility model.
Fig. 5 is the exemplary plot representing discharge poppet valve of the present utility model.
Embodiment
The explanation of reference character
2: hollow type bolt 10: cavity
10A: axle accommodating part 12: hooking part
14: outlet 20: piston assembly
22: piston rod 24: piston
26: piston ring 27: packing
30: exocoel 40: suction valve
42: valve body 42a: inlet hole
42b: tap hole 43b: through hole
45: bracket 45a: lift shaft
50: discharge path 50a: discharge path bottom
50b: discharge path top 52: discharge body
54: joint 54a: head
54b: jut 54c: screw portion
56: discharge and use poppet valve 56a: entrance
56b: path F: chamber
Below, based on embodiment shown in the drawings, the utility model will be described in more details.
First, in FIG, the entirety showing high-pressure service pump of the present utility model with sectional view is formed.As shown in Figure 1, high-pressure service pump of the present utility model comprises: piston assembly 20, for carrying out straight reciprocating motion, to compress; And cavity 10, combine with above-mentioned piston assembly 20 in inside, and as forming the framework of compression volume.Further, at the outer installment exocoel 30 of above-mentioned cavity 10, between above-mentioned cavity 10 and exocoel 30, form chamber F, the chamber F formed by this exocoel 30 forms in fact vacuum, thus, can realize the effect of heat insulation of the hot environment to outside.
Like this, by forming the chamber F of vacuum between cavity 10 and exocoel 30, make the extraneous gas of the condition of high temperature in the inside of high-pressure service pump while by compression while the LNG Liquefied natural gas of movement the impact that produces minimize, by this formation, the loss of gas can be suppressed to greatest extent.This exocoel 30 by independently metal material shaping, and is fixed on the outside of above-mentioned cavity 10, thus, between above-mentioned exocoel 30 and above-mentioned cavity 10, forms vacuum.Preferably, above-mentioned chamber F is formed in fact all parts beyond for the to-and-fro motion of piston assembly 20 and the discrepancy part of LNG Liquefied natural gas.
And, above-mentioned piston assembly 20 moves back and forth along left and right directions in FIG, by this to-and-fro motion, the LNG Liquefied natural gas of compressible inflow compression volume C, the cavity 10 that above-mentioned compression volume C is formed between the end of piston assembly 20 and suction valve 40 is inner.This piston assembly 20 performs straight reciprocating motion by crank unit or cam member (not shown) etc., and this crank unit or cam member are used for the rotary motion of drive motor to be converted to rectilinear movement.
Piston assembly 20 is made up of piston 24 and piston rod 22, and piston 24 is close to the inner side surface of cavity 10, and piston rod 22 is connected with piston 24 and for transferring power.In addition, compression volume C is formed with in the inside (right part in accompanying drawing) of cavity 10.Further, the piston 24 of above-mentioned piston assembly 20 is close to the inner side surface of above-mentioned compression volume C completely, avoids Leakage Gas, and realizes sliding.
Piston 24 outer side surface of above-mentioned piston assembly 20 is provided with multiple piston rings 26 that can perform sealing function, and this piston ring 26 is for preventing the leakage of gas.Further, packing 27 is respectively arranged with in the inner side of above-mentioned piston ring 26.This packing 27 part is cut open and is arc-shaped, is shaped, also can not shrinks under ultra-low temperature surroundings by the metal material such as Cuprum alloy such as containing teflon composition, and this packing 27 is arranged to promote piston ring 26 with the state of exerting pressure laterally.
In addition, being formed with the less piston rod of diameter 22 integratedly in the left side of above-mentioned piston 24, being provided with between cavity 10 and piston rod 22 for preventing the Sealing 23 of Leakage Gas and for keeping multiple ring shaped baffle 21a, 21b, 21c of Sealing 23.Certainly, multiple above-mentioned Sealing 23 also can be set.
Be formed with the hooking part 12 of ring-type outstanding to the inside in the left end of above-mentioned compression volume C, get involved the leaf spring 25 had for elastic support partition 21b in the left side of hooking part 12.Further, in the left end of cavity 10, hollow type bolt 2 and cavity 10 are screwed, and hollow type bolt 2 forms the through hole that the piston rod 22 of above-mentioned piston assembly 20 is passed.That is, from the enlarged view of Fig. 2, hollow type bolt 2 is formed with through hole 2b, and is formed with screw section 2a at outer side surface.
Screw section 2a and screw section 13 are screwed, and screw section 13 is formed at the left end inner circumference edge of cylindric axle accommodating part 10A, and axle accommodating part 10A can hold above-mentioned piston rod 22 in cavity 10.Further, get involved and have ring 5 between hollow type bolt 2 and piston assembly 20, ring 5 is for keeping inner airtight conditions.In the case, the axle accommodating part 10A that can hold the piston rod 22 of piston assembly 20 is connected with compression volume C in fact, and defines by above-mentioned hooking part 12.It can thus be appreciated that, the multiple ring for sealing and Sealing can being set between piston assembly 20 and cavity 10, also having the partition etc. of the position for keeping them.
In addition, the inner side in the outside (left side of accompanying drawing) of above-mentioned hollow type bolt 2 to through hole 2b is inserted with ring 6, and clasp 7 inserts the inner side of the through hole 2b of above-mentioned hollow type bolt 2, thus avoids ring 6 arbitrarily to depart from.In foregoing, describe piston assembly 20 and move back and forth in the inside of cavity 10 and the formation forming compression in compression volume C inside.
Next, the structure that the formation of LNG Liquefied natural gas to be compressed inflow and the LNG Liquefied natural gas after compressing are discharged is described.In the formation that LNG Liquefied natural gas flows into, by the work of independently low pressure pump, direction shown in arrow A in Fig. 1, that is, be inhaled in the direction contrary with above-mentioned piston assembly 20.The inside of entrance In side of piston assembly 20 opposition side being located at above-mentioned cavity 10 is provided with suction valve 40.
Suction valve 40 can be the one of relay valve, is arranged to gas in the accompanying drawings by suction valve 40 (direction towards compression volume) flowing to the left, and avoids gas to flow round about.Suction valve 40 in illustrated embodiment comprises: the valve body 42 being provided with multiple inlet hole 42a and tap hole 42b, and for the bracket (Poppet) 45 of the above-mentioned tap hole 42b of opening and closing.
Simultaneously known with reference to Fig. 3, the right side of bracket 45 is formed with lift shaft 45a, lift shaft 45a is directed to by the mode that can carry out moving linearly in the through hole 43b of valve body 42, and in the direction (left side in accompanying drawing) of Chao Changkai by spring 46 elastic support.Further, the tap hole 42b of above-mentioned valve body 42 is configured as area (discharge side) cylindrical shape of increasing to the left, and bracket 45 is configured as the cylindrical shape that the diameter corresponding with tap hole diminishes towards suction side.
Therefore, when above-mentioned bracket 45 and valve body 42 tap hole 42b in conjunction with time, under the state of (suction side) movement no longer to the right, bracket 45 is combined completely with tap hole 42b, in this state, suction valve 40 is in blocked state, and LNG Liquefied natural gas cannot be drawn into the inside of compression volume C.Further, the side of bracket 45 forms a side of compression volume C, and opposite side comes to realize thoroughly sealing to entrance In by the pressure of gas during compression.In addition, when the elastic restoring force of spring 46 to bracket 45, exert pressure to the left by (discharge direction), bracket 45 is open in evacuation aperture 42b, and LNG Liquefied natural gas flows into the inside of compression volume C by its space.
Next, the exhaust structure of the LNG Liquefied natural gas after compression is described.The discharge path 50 of the gas after externally discharging compression is formed in the side of above-mentioned compression volume C.Be formed with the outlet 14 be connected with compression volume C in the side of cavity 10, outlet 14 is communicated with discharge path 50.In the cavity 10 being formed with outlet 14, it is airtight conditions that discharge body 52 is arranged to relative to outside.Outlet 14 is rectangular with compression volume C in fact, and this represents relative to compression volume C, and outlet 14 is with radial shaping.
In addition, in discharge body 52, the order from outside to inner side, is provided with joint 54, spring 53 and discharge poppet valve 56.In the structure shown here, discharge path 50 can be formed respectively, through being arranged at the joint 54 of inside and the center of poppet valve 56 of discharging body 52, outside can be supplied in compression volume C by the gas compressed.
Joint 54 is provided with the discharge path top 50b of enter center, is formed with radiated entends and hexagon-head 54a for assembling at intermediate portion.Further, be provided with screw portion 54c in the bottom of hexagon-head 54a, the outer periphery of screw portion 54c are formed with screw thread.Screw portion 54c carries out screw-thread fit with the screw portion 52a being formed at the inner side of discharging body, and thus, joint 54 combines with discharge body 52.Further, under this bonding state, the upper-end surface of discharging body 52 is close in the lower end surface of head 54a, in the case, be formed with jut 54b in the lower end surface of head, jut 54b applies pressure to the Gask-O-Seal 55 of the upper-end surface being located at outer expose 52 further, thus is enough to Leakage prevention.
In addition, discharge the underpart blocking outlet 14 with poppet valve 56, and carry out elastic support by the spring 53 be located between joint 54 and poppet valve 56 to the direction of the above-mentioned outlet 14 of blocking.Known with reference to Fig. 1 and Fig. 5, discharge poppet valve 56 blocks above-mentioned outlet 14 by spring 53, is provided with the entrance 56a that can separate with the inner side surface of discharging body 52 at the wall portion of bottom.Further, when poppet valve 56 separates to top and opens outlet 14, gas is connected along path 56b with discharge path bottom 50a after being flowed into by above-mentioned entrance 56a.
Next, the work of the high-pressure service pump had as stated formation is described.First, by the low pressure pump of upstream side being arranged at high-pressure service pump of the present utility model, the LNG Liquefied natural gas of low pressure (such as, 13 bar) is supplied by entrance In, piston assembly 20 moves back and forth to the left and right directions in figure by driving source (not shown), as mentioned above.
When above-mentioned piston assembly 20 moves to the left side in figure, under the effect of piston 24, along with compression volume C becomes large, pressure diminishes to greatest extent.Further, bracket 45 is pushed open by the elastic force of the spring 46 that the piston 24 along with above-mentioned piston assembly 20 is thrown off from bracket 45 and produced to the left, and the LNG Liquefied natural gas supplied flows into compression volume C.
When piston assembly 20 from move to greatest extent left side after point (top dead center) move to the right time, under the effect of piston 24, the gas of compression volume C inside starts to be compressed, by this pressure, bracket 45 is closed, and the tap hole 42b of suction valve 40 closes.Further, at this time point starting to compress, the discharge lower end of poppet valve 56 state in blocking outlet 14.
In this state, when piston assembly 20 moves to the right, the gas of compression volume C inside is reached goal pressure by compressing, and this pressure in fact can upwardly discharge poppet valve 56, and outlet 14 is opened.In the case, in fact, the rock gas of liquefaction is in liquid condition, even if produced the pressure of regulation by compressing, its Volume Changes is very little compared to the Volume Changes under gaseous state.Further, outlet 14 is positioned at the rightmost side of compression volume C, therefore, until the piston 24 of piston assembly 20 arrives the point (lower dead center) of the rightmost side, can discharge the gas after all compressions.
Further, rise to the entrance 56a of the side of discharge poppet valve 56 after the elastic force of the gas opposing spring 53 after this compression, and arrive discharge path 50 through path 56b.As mentioned above, discharge path 50 is communicated with the top of joint 54.Then, the LNG Liquefied natural gas of being discharged by the top of above-mentioned joint 54 can be transplanted on required place.
In the case, according to the utility model, relative to the movement direction of piston assembly 20 in compression volume C, outlet 14 at the top dead center annex of piston 24 with radial shaping, when piston assembly 20 is arranged to be positioned at top dead center and bracket 45 close to greatest extent.Therefore, the gas be sufficiently compressed is discharged by outlet, simultaneously by the formation of bracket 45, can also avoid producing loss in compression volume.Known by this formation, high-pressure service pump of the present utility model can improve the compression efficiency of LNG Liquefied natural gas substantially.
In the case, the piston 24 of above-mentioned piston assembly 20 is provided with multiple piston ring 26 and packing 27, by the instantaneous pressure of piston assembly 20 close to bracket 45, the gas crossover piston 24 of compression volume C inside, thus produce at the inner gas to the left side movement of piston 24 of compression volume C, consider that the head pressure in high-pressure service pump is about 300 bar, be enough to estimate this gas flow.
Therefore, in the utility model, in the cavity 20 in the outside of compression volume C, be formed with return path 62.Return path 62 be left part for connecting compression volume C (piston 24 opposition side, be also simultaneously piston 24 bottom dead center position near) and the space of entrance In.Further, in the left end of above-mentioned compression volume C, connecting passage 64 connects compression volume C and return path 62.
In above-mentioned compression process, gas passes between the piston ring 26 and the inwall of compression volume C of piston assembly 20, and in the space of the compression volume on the left of piston 24, gas is directed into entrance In part by above-mentioned return path 62.Consider that above-mentioned connecting passage 64 forms in the lower of piston 24 (comprising left side and right side), all gas that the recurrence of known this gas can produce in the process to lower dead center movement for piston 24 carries out.
As mentioned above, according to the utility model, the piston assembly of compression volume operationally, does not produce any compression loss, effectively can compress and liquefy rock gas to required degree.Further, certainly, this compression can consider in fact the stroking distance of above-mentioned compression volume and piston assembly from etc. design.
In basic fundamental thought range of the present utility model as above; the utility model those of ordinary skill in the field can implement other various distortion; obviously, protection domain of the present utility model should make an explanation based on the claimed scope of the technical solution of the utility model.
Claims (2)
1. a ultralow temperature high-pressure service pump is used in LNG Liquefied natural gas transfer, it is characterized in that,
Described ultralow temperature high-pressure service pump comprises:
Cavity (10), described cavity is provided with entrance (IN), axle accommodating part (10A), compression volume (C) and outlet (14), described entrance (IN) can flow into LNG Liquefied natural gas, described axle accommodating part (10A) is formed at the opposition side of described entrance (IN), described compression volume (C) is formed between described axle accommodating part and described entrance, described outlet (14) is formed from the side of described compression volume to radiation direction, and for discharging the LNG Liquefied natural gas after compression;
Piston assembly (20), described piston assembly is provided with piston rod and piston, described piston rod is received in the mode being airtight conditions relative to the outside of described axle accommodating part, described piston and the integrally formed and inner side surface being close to described compression volume of described piston rod slide, and described piston assembly (20) moves back and forth by the driving source of outside;
Suction valve (40), described suction valve is arranged at the inner side of the entrance (IN) of described cavity, and LNG Liquefied natural gas can be made only to pass through to compression volume;
Discharge body (52), described discharge body is provided with discharge poppet valve (56), spring (53) and joint, described discharge poppet valve (56) is provided with discharge path bottom (50a) and entrance (56a), described discharge path bottom (50a) is can the mode of outlet of cavity described in opening and closing arrange, and externally can discharge LNG Liquefied natural gas, described entrance (56a) is formed at the side of described discharge poppet valve (56), and be connected with described discharge path bottom, described spring (53) is for carrying out elastic support to the lower surface of described discharge poppet valve, the lower surface of described discharge poppet valve is made to close described outlet (14), discharge path top (50b) is provided with at described joint, described discharge path top (50b) is connected with described discharge path bottom, and on the top of described spring being that the mode of airtight conditions combines with housing relative to outside,
Connecting passage (64), is formed at the lower of the piston of the piston assembly of the inside of above-mentioned compression volume, and is positioned at the opposition side of described outlet; And
Return path (62), for connecting the entrance of described connecting passage and cavity; Wherein
In the process of described piston assembly to top dead center movement, the making every effort to overcome the elastic force that takes spring (53) and make described discharge poppet valve move up of LNG Liquefied natural gas of compression volume internal compression, thus described outlet (14) is opened, externally can supply the LNG Liquefied natural gas after compression thus;
In the process of described piston assembly to lower dead center movement, LNG Liquefied natural gas is passed between the piston ring (26) and the inwall of compression volume (C) of described piston assembly (20), and move on the left of piston in compression volume, described LNG Liquefied natural gas, by the piston to lower dead center movement, is guided to the inside of the entrance (IN) of cavity by connecting passage and return path.
2. LNG Liquefied natural gas transfer ultralow temperature high-pressure service pump according to claim 1, it is characterized in that, described ultralow temperature high-pressure service pump also comprises exocoel, and described exocoel can be formed at the outer side surface of described cavity and be used for carrying out heat insulation chamber (F) with cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520669735.3U CN205117641U (en) | 2015-08-31 | 2015-08-31 | Liquefied natural gas transfers and uses ultra -low temperature high -pressure pump |
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|---|---|---|---|
| CN201520669735.3U CN205117641U (en) | 2015-08-31 | 2015-08-31 | Liquefied natural gas transfers and uses ultra -low temperature high -pressure pump |
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| CN205117641U true CN205117641U (en) | 2016-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050044A (en) * | 2017-12-18 | 2018-05-18 | 湖州百汇低温设备有限公司 | A kind of ethylene low temperature reciprocating pump |
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2015
- 2015-08-31 CN CN201520669735.3U patent/CN205117641U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050044A (en) * | 2017-12-18 | 2018-05-18 | 湖州百汇低温设备有限公司 | A kind of ethylene low temperature reciprocating pump |
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