CN108775282B - Pressure-isolating reciprocating pump and heating system based on pressure-isolating reciprocating pump - Google Patents
Pressure-isolating reciprocating pump and heating system based on pressure-isolating reciprocating pump Download PDFInfo
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- CN108775282B CN108775282B CN201810735096.4A CN201810735096A CN108775282B CN 108775282 B CN108775282 B CN 108775282B CN 201810735096 A CN201810735096 A CN 201810735096A CN 108775282 B CN108775282 B CN 108775282B
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- water supply
- primary
- water return
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 257
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a pressure-isolating reciprocating pump which comprises a cylinder body, wherein a piston is arranged in the cylinder body and is connected with a connecting rod, and the connecting rod can drive the piston to reciprocate in the cylinder body; the piston divides the cylinder body into a first chamber and a second chamber, the first chamber is provided with a primary water supply door and a secondary water supply door, and the second chamber is provided with a primary water return door and a secondary water return door; the primary water supply door, the primary water return door, the secondary water supply door and the secondary water return door are connected with the control mechanism, and the control mechanism controls the opening and closing. The invention also discloses a heating system and a heating method. The invention has simple mechanism and convenient installation, can be singly used, and can also be used by connecting a plurality of pressure-isolating reciprocating pumps in parallel. The pressure-isolating reciprocating pump of the invention enables the primary side water to be communicated with the secondary side water for heat transfer and isolates the primary side pressure and the secondary side pressure, and has the effects of low backwater temperature and high heat supply efficiency.
Description
Technical Field
The invention relates to a reciprocating pump, in particular to a pressure-isolating reciprocating pump applied to a heating system.
Background
At present, there are two main forms of heating stations for urban heating systems: an indirect heat exchange station and a mixed water direct supply station. The indirect heat exchange station exchanges heat between the primary side and the secondary side through the heat exchanger, and the heat exchanger generally adopts a plate heat exchanger or a tube heat exchanger, but the primary side and the secondary side are not directly communicated when the plate heat exchanger and the tube heat exchanger exchange heat, so that the defects of high primary return water temperature and low heat exchange efficiency are generated.
The mixed water direct supply station directly mixes and exchanges heat primary high-temperature water and low-temperature secondary water in the mixing tank, and the mixed water direct supply mode has the advantages of low return water temperature and high heat supply efficiency in a relative indirect heat exchange mode, but because the mixed water direct supply mode cannot isolate primary side pressure and secondary side pressure, overpressure on the secondary side is easy to cause.
Disclosure of Invention
The invention provides a pressure-isolating reciprocating pump and a heat supply system based on the pressure-isolating reciprocating pump, which have the effects of low return water temperature and high heat supply efficiency. The specific technical scheme is as follows:
the pressure-isolating reciprocating pump includes one cylinder with piston inside, and one connecting rod connected to the piston and capable of driving the piston to reciprocate inside the cylinder; the piston divides the cylinder body into a first chamber and a second chamber, the first chamber is provided with a primary water supply door and a secondary water supply door, and the second chamber is provided with a primary water return door and a secondary water return door; the primary water supply door, the primary water return door, the secondary water supply door and the secondary water return door are connected with the control mechanism, and the control mechanism controls the opening and closing.
Further, the control mechanism employs a timing mechanism.
Further, the timing mechanism is an electromagnetic valve timing mechanism, the primary water supply door, the primary water return door, the secondary water supply door and the secondary water return door are respectively connected with an electromagnetic valve, the electromagnetic valve is connected with the controller through signal lines, and the controller controls the opening and closing of the electromagnetic valve.
Further, the control mechanism adopts a one-way valve and a one-way back pressure valve.
Further, the primary water supply door adopts a one-way valve, the primary water return door adopts a one-way back pressure valve, the secondary water supply door adopts a one-way back pressure valve, and the secondary water return door adopts a one-way valve.
Further, the piston is in interference fit with the inner wall of the cylinder.
Further, still include water supply temperature sensor, return water temperature sensor and reciprocal counter, water supply temperature sensor links to each other with first cavity, and return water temperature sensor links to each other with the second cavity, and reciprocal counter links to each other with the connecting rod.
A heat supply system comprises the pressure-isolating reciprocating pump, a connecting rod connected with a power mechanism, a primary water supply door connected with a primary water supply pipe, a primary water return door connected with a primary water return pipe, a secondary water supply door connected with a secondary water supply pipe, and a secondary water return door connected with a secondary water return pipe.
Further, the hydraulic pump comprises a plurality of pressure-isolating reciprocating pumps which are arranged in parallel.
A heat supply method, which uses the heat supply system, comprises the following steps:
the piston moves towards the direction of the second chamber, the primary water supply door on the first chamber and the primary water return door on the second chamber are opened, the secondary water supply door on the first chamber and the secondary water return door on the second chamber are closed, high-temperature water in the primary water supply pipe enters the first chamber through the primary water supply door, and low-temperature water in the second chamber enters the primary water return pipe through the primary water return door;
the piston moves towards the direction of the first chamber, the primary water supply door on the first chamber and the primary water return door on the second chamber are closed, the secondary water supply door on the first chamber and the secondary water return door on the second chamber are opened, the high-temperature water in the first chamber enters into the secondary water supply pipe through the secondary water supply door, and the low-temperature water in the secondary water return pipe enters into the second chamber through the secondary water return door.
The invention has simple mechanism and convenient installation, can be singly used, and can also be used by connecting a plurality of pressure-isolating reciprocating pumps in parallel. The pressure-isolating reciprocating pump of the invention enables the primary side water to be communicated with the secondary side water for heat transfer and isolates the primary side pressure and the secondary side pressure, and has the effects of low backwater temperature and high heat supply efficiency.
Drawings
FIG. 1 is a schematic diagram of a pressure-isolated reciprocating pump of the present invention;
FIG. 2 is a schematic diagram of a solenoid valve controlled pressure-isolated reciprocating pump of the present invention;
fig. 3 is a schematic structural view of a pressure-isolating reciprocating pump controlled by a one-way back pressure valve according to the present invention.
Detailed Description
For a better understanding of the objects, functions and specific design of the present invention, a pressure-isolating reciprocating pump and a heating system based on the pressure-isolating reciprocating pump according to the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the pressure-isolating reciprocating pump comprises a cylinder body 1, wherein a piston 2 is arranged in the cylinder body 1, the piston 2 is connected with a connecting rod 3, and the connecting rod 3 can drive the piston 2 to reciprocate in the cylinder body 1. The two ends of the cylinder body 1 are respectively provided with a primary water supply door 4, a primary water return door 5, a secondary water supply door 6 and a secondary water return door 7.
The primary water supply door 4, the primary water return door 5, the secondary water supply door 6 and the secondary water return door 7 are controlled to be opened and closed by a control mechanism, and the control mechanism is utilized to enable the primary water supply door 4, the primary water return door 5, the secondary water supply door 6 and the secondary water return door 7 to form interlocking actions with the piston 2, wherein the interlocking actions are as follows: when the piston 2 moves away from one end where the primary water supply door 4 and the secondary water supply door 6 are located, the primary water supply door 4 and the primary water return door 5 are opened, and the secondary water supply door 6 and the secondary water return door 7 are closed; when the piston moves to one end where the primary water supply door 4 and the secondary water supply door 6 are, the primary water supply door 4 and the primary water return door 5 are closed, and the secondary water supply door 6 and the secondary water return door 7 are opened. The control mechanism is a timing mechanism or a one-way back pressure valve.
The power mechanism of the heating system is connected with the connecting rod 3, the primary water supply pipe is connected with the primary water supply door 4, the primary water return pipe is connected with the primary water return door 5, the secondary water supply pipe is connected with the secondary water supply door 6, and the secondary water return pipe is connected with the secondary water return door 7. When the piston 2 moves away from one end where the primary water supply door 4 and the secondary water supply door 6 are located, the primary water supply door 4 and the primary water return door 5 are opened, the secondary water supply door 6 and the secondary water return door 7 are closed, at the moment, negative pressure is formed in the first chamber 11, high-temperature water in the primary water supply pipe enters the first chamber 11 through the primary water supply door 4, low-temperature water in the second chamber 12 is extruded to form positive pressure, and the low-temperature water in the second chamber 12 enters the primary water return pipe through the primary water return door 5 and returns to the thermal power station for heating; when the piston 2 moves to one end where the primary water supply door 4 and the secondary water supply door 6 are located, the primary water supply door 4 and the primary water return door 5 are closed, the secondary water supply door 6 and the secondary water return door 7 are opened, at this time, high temperature water in the first chamber 11 is extruded to form positive pressure, the high temperature water in the first chamber 11 enters into the secondary water supply pipe through the secondary water supply door 6, so that heat is supplied to heat supply equipment of a user, negative pressure is formed in the second chamber 12, and low temperature water in the secondary water return pipe enters into the second chamber 12 through the secondary water return door 7. Preferably, a sealing means is provided at the junction of the connecting rod 3 and the cylinder 1 to prevent water leakage in the second chamber.
The piston 3 reciprocates once to realize primary heat exchange, and it is noted that the piston 2 is in interference fit with the inner wall of the cylinder 1 to isolate the first chamber 11 from the second chamber 12, thereby isolating the pressure of the primary side and the secondary side.
Preferably, the pressure-isolating reciprocating pump further comprises a water supply temperature sensor 13, a backwater temperature sensor 14 and a reciprocating counter 15, wherein the water supply temperature sensor 13 is connected with the first chamber 11, the backwater temperature sensor 14 is connected with the second chamber 12, and the reciprocating counter 15 is connected with the connecting rod 3, so that the pressure-isolating reciprocating pump has a heat metering function.
Example 1
The timing mechanism may be solenoid valve timing control, pneumatic valve timing control, hydraulic valve timing control, belt drive or gear drive timing control.
As shown in fig. 2, the pressure-isolating reciprocating pump of the embodiment adopts a control mode of an electromagnetic valve timing mechanism, and comprises a cylinder body 1, wherein a piston 2 is arranged in the cylinder body 1, the piston 2 is connected with a connecting rod 3, and the connecting rod 3 can drive the piston 2 to reciprocate in the cylinder body 1. The two ends of the cylinder body 1 are respectively provided with a primary water supply electromagnetic valve 4, a primary water return electromagnetic valve 5, a secondary water supply electromagnetic valve 6 and a secondary water return electromagnetic valve 7.
The connecting rod 3 is connected with a power mechanism of the heating system, the primary water supply electromagnetic valve 4 is connected with a primary water supply pipe of the heating system, the primary water return electromagnetic valve 5 is connected with a primary water return pipe of the heating system, the secondary water supply electromagnetic valve 6 is connected with a secondary water supply pipe of the heating system, and the secondary water return electromagnetic valve 7 is connected with a secondary water return pipe of the heating system. The primary water supply electromagnetic valve 4, the primary water return electromagnetic valve 5, the secondary water supply electromagnetic valve 6 and the secondary water return electromagnetic valve 7 are connected with the controller 8 through signal lines 9, the controller judges the movement direction of the piston and sends signals through the signal lines 9, so that the primary water supply electromagnetic valve 4, the primary water return electromagnetic valve 5, the secondary water supply electromagnetic valve 6, the secondary water return electromagnetic valve 7 and the piston 2 form interlocking actions, and the interlocking actions are as follows: when the piston 2 moves away from one end where the primary water supply electromagnetic valve 4 and the secondary water supply electromagnetic valve 6 are, the primary water supply electromagnetic valve 4 and the primary water return electromagnetic valve 5 are opened, the secondary water supply electromagnetic valve 6 and the secondary water return electromagnetic valve 7 are closed, at the moment, negative pressure is formed in the first chamber 11, high-temperature water in the primary water supply pipe enters the first chamber 11 through the primary water supply electromagnetic valve 4, low-temperature water in the second chamber 12 is extruded to form positive pressure, and low-temperature water in the second chamber 12 enters the primary water return pipe through the primary water return electromagnetic valve 5 and returns to the thermal power station for heating; when the piston 2 moves to one end where the primary water supply electromagnetic valve 4 and the secondary water supply electromagnetic valve 6 are located, the primary water supply electromagnetic valve 4 and the primary water return electromagnetic valve 5 are closed, the secondary water supply electromagnetic valve 6 and the secondary water return electromagnetic valve 7 are opened, at this time, the high-temperature water in the first chamber 11 is extruded to form positive pressure, the high-temperature water in the first chamber 11 enters into the secondary water supply pipe through the secondary water supply electromagnetic valve 6, so that heat is supplied to heat supply equipment of a user, negative pressure is formed in the second chamber 12, and the low-temperature water in the secondary water return pipe enters into the second chamber 12 through the secondary water return electromagnetic valve 7.
The water supply temperature sensor, the backwater temperature sensor and the reciprocating counter can be additionally arranged in the embodiment, so that the embodiment has a heat metering function.
Example 2
As shown in fig. 3, the pressure-isolating reciprocating pump in this embodiment adopts a control mode of a unidirectional back pressure valve, and includes a cylinder 1, a piston 2 is disposed in the cylinder 1, the piston 2 is connected with a connecting rod 3, and the connecting rod 3 can drive the piston 2 to reciprocate in the cylinder 1. The two ends of the cylinder body 1 are respectively provided with a primary water supply one-way valve 4, a primary water return one-way back pressure valve 5, a secondary water supply one-way back pressure valve 6 and a secondary water return one-way valve 7.
The connecting rod 3 is connected with a power mechanism of the heating system, the primary water supply one-way valve 4 is connected with a primary water supply pipe of the heating system, the primary water return one-way back pressure valve 5 is connected with a primary water return pipe of the heating system, the secondary water supply one-way back pressure valve 6 is connected with a secondary water supply pipe of the heating system, and the secondary water return one-way valve 7 is connected with a secondary water return pipe of the heating system. When the piston 2 moves away from one end where the primary water supply one-way valve 4 and the secondary water supply one-way back pressure valve 6 are located, negative pressure is formed in the first chamber 11, so that the primary water supply one-way valve 4 is opened, high-temperature water in the primary water supply pipe enters the first chamber 11, low-temperature water in the second chamber 12 is extruded to form positive pressure, so that the primary water return back pressure valve 5 is opened, low-temperature water in the second chamber 12 enters the primary water return pipe through the primary water return back pressure valve 5, and the secondary water supply one-way back pressure valve 6 and the secondary water return one-way valve 7 are in a closed state; when the piston 2 acts on one end where the primary water supply one-way valve 4 and the secondary water supply one-way back pressure valve 6 are located, high temperature water in the first chamber 11 is extruded to form positive pressure, so that the secondary water supply one-way back pressure valve 6 is opened, high temperature water in the first chamber 11 enters the secondary water supply pipe, negative pressure is formed in the second chamber 12, the secondary water return one-way valve 7 is opened, low temperature water in the secondary water return pipe enters the second chamber 12, and the primary water supply one-way valve 4 and the primary water return one-way back pressure valve 5 are in a closed state.
The water supply temperature sensor, the backwater temperature sensor and the reciprocating counter can be additionally arranged in the embodiment, so that the embodiment has a heat metering function.
The invention has simple mechanism and convenient installation, can be singly used, and can also be used by connecting a plurality of pressure-isolating reciprocating pumps in parallel. The pressure-isolating reciprocating pump of the invention enables the primary side water to be communicated with the secondary side water for heat transfer and isolates the primary side pressure and the secondary side pressure, and has the effects of low backwater temperature and high heat supply efficiency.
The invention has been further described with reference to specific embodiments, but it should be understood that the detailed description is not to be construed as limiting the spirit and scope of the invention, but rather as providing those skilled in the art with the benefit of this disclosure with the benefit of their various modifications to the described embodiments.
Claims (2)
1. A heat supply method is characterized in that a heat supply system is used, the heat supply system comprises a pressure-isolating reciprocating pump, the pressure-isolating reciprocating pump comprises a cylinder body, a piston is arranged in the cylinder body, the piston is in interference fit with the inner wall of the cylinder body, the piston is connected with a connecting rod, the connecting rod is connected with a power mechanism, and the connecting rod can drive the piston to reciprocate in the cylinder body; the piston divides the cylinder body into a first chamber and a second chamber, the first chamber is provided with a primary water supply door and a secondary water supply door, and the second chamber is provided with a primary water return door and a secondary water return door; the primary water supply door, the primary water return door, the secondary water supply door and the secondary water return door are connected with the control mechanism, and the control mechanism controls the opening and closing; the control mechanism adopts a timing mechanism, the timing mechanism is an electromagnetic valve timing mechanism, the primary water supply door, the primary water return door, the secondary water supply door and the secondary water return door are respectively connected with an electromagnetic valve, the electromagnetic valve is connected with the controller through a signal wire, and the controller controls the opening and closing of the electromagnetic valve; the primary water supply door is connected with the primary water supply pipe, the primary water return door is connected with the primary water return pipe, the secondary water supply door is connected with the secondary water supply pipe, and the secondary water return door is connected with the secondary water return pipe; the device also comprises a water supply temperature sensor, a backwater temperature sensor and a reciprocating counter, wherein the water supply temperature sensor is connected with the first chamber, the backwater temperature sensor is connected with the second chamber, and the reciprocating counter is connected with the connecting rod;
the heat supply method comprises the following steps: the piston moves towards the direction of the second chamber, the primary water supply door on the first chamber and the primary water return door on the second chamber are opened, the secondary water supply door on the first chamber and the secondary water return door on the second chamber are closed, high-temperature water in the primary water supply pipe enters the first chamber through the primary water supply door, and low-temperature water in the second chamber enters the primary water return pipe through the primary water return door;
the piston moves towards the direction of the first chamber, the primary water supply door on the first chamber and the primary water return door on the second chamber are closed, the secondary water supply door on the first chamber and the secondary water return door on the second chamber are opened, the high-temperature water in the first chamber enters into the secondary water supply pipe through the secondary water supply door, and the low-temperature water in the secondary water return pipe enters into the second chamber through the secondary water return door.
2. A heating method according to claim 1, comprising a plurality of pressure-isolating reciprocating pumps, the plurality of pressure-isolating reciprocating pumps being arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810735096.4A CN108775282B (en) | 2018-07-05 | 2018-07-05 | Pressure-isolating reciprocating pump and heating system based on pressure-isolating reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810735096.4A CN108775282B (en) | 2018-07-05 | 2018-07-05 | Pressure-isolating reciprocating pump and heating system based on pressure-isolating reciprocating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108775282A CN108775282A (en) | 2018-11-09 |
| CN108775282B true CN108775282B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810735096.4A Active CN108775282B (en) | 2018-07-05 | 2018-07-05 | Pressure-isolating reciprocating pump and heating system based on pressure-isolating reciprocating pump |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529456B (en) * | 2019-09-25 | 2024-05-31 | 杭州力龙液压有限公司 | Cylinder body, hydraulic pump and hydraulic motor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE390189C (en) * | 1913-10-13 | 1924-02-14 | Auxiliaire Des Chemins De Fer | Device for feeding locomotive boilers with warm water |
| JPS57164250A (en) * | 1981-03-31 | 1982-10-08 | Matsushita Electric Works Ltd | Solar heat utilizing hot water supply device |
| CN202082091U (en) * | 2011-04-28 | 2011-12-21 | 苗军 | Piston type liquid compressor with sealed cylinder port |
| CN102748266A (en) * | 2012-07-02 | 2012-10-24 | 谢瑞友 | Temperature difference booster pump |
| WO2016037257A1 (en) * | 2014-09-09 | 2016-03-17 | Nasrallah Jihad Elias | A device for heating fluids with variable capacity |
| CN210371134U (en) * | 2018-07-05 | 2020-04-21 | 韩向广 | Pressure-isolating reciprocating pump and heat supply system based on same |
-
2018
- 2018-07-05 CN CN201810735096.4A patent/CN108775282B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE390189C (en) * | 1913-10-13 | 1924-02-14 | Auxiliaire Des Chemins De Fer | Device for feeding locomotive boilers with warm water |
| JPS57164250A (en) * | 1981-03-31 | 1982-10-08 | Matsushita Electric Works Ltd | Solar heat utilizing hot water supply device |
| CN202082091U (en) * | 2011-04-28 | 2011-12-21 | 苗军 | Piston type liquid compressor with sealed cylinder port |
| CN102748266A (en) * | 2012-07-02 | 2012-10-24 | 谢瑞友 | Temperature difference booster pump |
| WO2016037257A1 (en) * | 2014-09-09 | 2016-03-17 | Nasrallah Jihad Elias | A device for heating fluids with variable capacity |
| CN210371134U (en) * | 2018-07-05 | 2020-04-21 | 韩向广 | Pressure-isolating reciprocating pump and heat supply system based on same |
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| Publication number | Publication date |
|---|---|
| CN108775282A (en) | 2018-11-09 |
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