CN112539164A - Hydraulic diaphragm metering pump with pressure-equalizing and limiting oil supplementing functions - Google Patents
Hydraulic diaphragm metering pump with pressure-equalizing and limiting oil supplementing functions Download PDFInfo
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- CN112539164A CN112539164A CN202011417312.4A CN202011417312A CN112539164A CN 112539164 A CN112539164 A CN 112539164A CN 202011417312 A CN202011417312 A CN 202011417312A CN 112539164 A CN112539164 A CN 112539164A
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- pipeline
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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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
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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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0081—Special features systems, control, safety measures
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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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
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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
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/03—Stopping, starting, unloading or idling control by means of valves
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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
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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
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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
- F04B53/1002—Ball valves
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention belongs to the field of conveying and metering equipment, and particularly relates to a hydraulic diaphragm metering pump capable of equalizing pressure, limiting and supplementing oil. A novel hydraulic diaphragm metering pump with pressure-equalizing limiting oil compensation comprises a hydraulic part, a front pump head, a rear pump head, an R plate, a diaphragm, a safety valve, a compensation valve, a limiting valve and a cylinder sleeve assembly, wherein the front pump head, the rear pump head, the R plate, the diaphragm, the safety valve, the compensation valve, the limiting valve and the cylinder sleeve assembly are arranged on the; the inner side of the front pump head is provided with a parabolic front pump head R cavity, the diaphragm covers the front pump head R cavity, the R plate buckles the outer edge of the diaphragm, the rear pump head is connected with the front pump head in a sealing manner, the R plate and the diaphragm are positioned between the front pump head and the rear pump head, and the front pump head R cavity is communicated with a conveying pipeline of the front pump head; the technical scheme of the invention prolongs the service life of the diaphragm and simultaneously ensures the safe operation of the equipment; the metering accuracy of the hydraulic diaphragm metering pump is improved.
Description
Technical Field
The invention belongs to the field of conveying and metering equipment, and particularly relates to a hydraulic diaphragm metering pump capable of equalizing pressure, limiting and supplementing oil.
Background
The hydraulic diaphragm type metering pump is a diaphragm type reciprocating pump, and is widely applied to scientific research and production departments such as petroleum, natural gas, chemical engineering, atomic energy technology, power plants, paper making, plastics, food, medicine, environmental protection, drinking water, sewage treatment, textile, mine and the like. The working principle is as follows: the motor drives the worm gear pair, the rotating motion of the motor is converted into the reciprocating motion of the plunger through the biasing mechanism, the reciprocating motion of the plunger pushes hydraulic oil, and the hydraulic oil pushes the diaphragm to reciprocate so as to realize the suction and discharge of media.
Suction stroke: when the sliding rod drives the plunger piston to move backwards, the inner volume of the cylinder sleeve is increased to generate negative pressure, the diaphragm moves backwards, the volume between the diaphragm and the front pump head is increased, the one-way valve of the suction pipeline is opened, the medium in the inlet pipeline enters the R cavity of the pump head, when the suction stroke is finished, the movement of the diaphragm stops instantly, the pressure in the pump head is balanced with the pressure in the inlet pipeline, and the inlet one-way valve is reset.
Discharge stroke: when the sliding rod drives the plunger piston to move forwards, the plunger piston pushes the diaphragm to move forwards through hydraulic oil, the pressure in the pump head rises immediately, when the pressure of the pump head is higher than the outlet pressure, the outlet one-way valve is opened, the medium in the pump head enters the discharge pipeline, when the discharge stroke is finished, the movement of the diaphragm stops instantly again, the pressure in the pump head is equal to the outlet pressure, the outlet one-way valve resets, and then the next cycle is started.
In actual work, an intake stroke medium enters the R cavity of the front pump head under the condition of intake negative pressure, namely, a pressure difference exists on two sides of the diaphragm, when the intake stroke is finished and the discharge stroke is not started, the diaphragm is tightly attached to the R plate, the pressure difference still exists, the diaphragm is still extruded by the pressure difference, and the diaphragm is pressed and deformed or even broken. The metering precision of the diaphragm pump is seriously influenced by severe deformation of the diaphragm, and the metering pump cannot normally work due to breakage of the diaphragm.
How to protect the diaphragm from being extruded and deformed or cracked, and the key point of the diaphragm type metering pump is to prolong the service life of the diaphragm and ensure the metering accuracy.
Disclosure of Invention
The invention aims to provide a hydraulic diaphragm metering pump capable of realizing uniform pressure-equalizing limiting oil supplement, which can realize uniform limiting oil supplement, prolong the service life of a diaphragm and ensure the metering accuracy.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a hydraulic diaphragm metering pump with pressure-equalizing limiting oil compensation comprises a hydraulic part, a front pump head, a rear pump head, an R plate, a diaphragm, a safety valve, a compensation valve, a limiting valve and a cylinder sleeve assembly, wherein the front pump head, the rear pump head, the R plate, the diaphragm, the safety valve, the compensation valve, the limiting valve and the cylinder sleeve assembly are arranged on the; the inner side of the front pump head is provided with a parabolic front pump head R cavity, the diaphragm covers the front pump head R cavity, the R plate buckles the outer edge of the diaphragm, the rear pump head is connected with the front pump head in a sealing way, the R plate and the diaphragm are positioned between the front pump head and the rear pump head, the front pump head R cavity is communicated with a conveying pipeline of the front pump head, the rear pump head is connected with a cylinder sleeve component, the cylinder sleeve component comprises a cylinder sleeve and a plunger capable of reciprocating in the cylinder sleeve, the rear pump head is provided with a safety valve, the safety valve is communicated with a high-pressure pipeline in the rear pump head, the high-pressure pipeline is communicated with a working pipeline in the rear pump head, the working pipeline is communicated with the rear pump head R cavity between the R plate and the diaphragm, the working pipeline is communicated with the cylinder sleeve cavity of the cylinder sleeve component, the limit valve is arranged in the rear pump head, the limit valve comprises a valve core and a valve sleeve, the case passes the R board and is in back pump head R intracavity, the valve barrel on be provided with the oil supplementing through-hole, be equipped with the oil supplementing annular on the case, oil supplementing through-hole one end and the oil supplementing pipeline UNICOM that sets up in cylinder liner chamber UNICOM other end and the back pump head, the compensating valve set up on the oil supplementing pipeline, the compensating valve passes through oil supplementing pipeline and oil pocket UNICOM.
And a hydraulic oil sealing space is formed between the diaphragm and the rear pump head.
Suction stroke: when the plunger moves backwards, the volume in the cylinder sleeve is increased to generate negative pressure, the diaphragm moves backwards, the volume between the diaphragm and the front pump head is increased, the suction one-way valve of the conveying pipeline is opened, the medium enters the R cavity of the front pump head, the diaphragm pushes the valve core of the limiting valve to move in the process, the oil supplementing ring groove on the valve core is communicated with the oil supplementing through hole of the valve sleeve, when the negative pressure exceeds the set value, the compensating valve is opened, the oil cavity flows into the R cavity of the rear pump head through the compensating valve and the oil supplementing pipeline, the pressure in the R cavity of the rear pump head is balanced with the pressure of the oil cavity, and.
Discharge stroke: when the plunger moves forwards, the plunger pushes the diaphragm to move forwards through hydraulic oil, the pressure in the R cavity of the front pump head rises immediately, the one-way valve at the outlet of the conveying pipeline is opened, the diaphragm is gradually far away from the R cavity of the rear pump head in the process, the valve core in the limiting valve also moves forwards, and the oil supplementing ring groove in the valve core is disconnected with the oil supplementing through hole of the valve sleeve. If the pressure of the R cavity of the rear pump head is too high, a safety valve communicated with the high-pressure pipeline can be started, excessive hydraulic oil is discharged, and the safe operation of equipment is ensured.
The limiting valve comprises a valve core, a valve sleeve and an O-shaped sealing ring sleeved on the valve sleeve, the valve core is sleeved in the valve sleeve, a return spring is arranged between the valve core and the valve sleeve, a diaphragm limiting stop block is arranged at one end of the valve core, a retaining ring is arranged at the other end of the valve core, and the distance from the diaphragm limiting stop block to the valve sleeve is equal to the distance from the oil supplementing ring groove to the oil supplementing through hole. The fit clearance between the valve core and the valve sleeve is 0.005-0.008 mm. The check block has larger contact surface and diaphragm effect, the check ring can limit the valve core to move over the head, the distance from the check block to the valve sleeve is equal to the distance from the oil supplementing ring groove to the oil supplementing through hole, the oil supplementing process is effectively controlled, and the pressure equalizing in the R cavity of the rear pump head is guaranteed. Because the limit valve has high tightness requirement, high reciprocating frequency and high hardness requirement, the limit valve is made of bearing steel.
The safety valve is provided with a recovery pipeline which is communicated with the oil cavity. The recovery pipeline can return the hydraulic oil discharged from the high-pressure pipeline to the oil cavity.
The safety valve, the compensation valve and the limit valve are connected to the rear pump head through threads. The threaded connection ensures the stability of the installation.
The high-pressure pipeline enters the safety valve from two positions.
The two O-shaped sealing rings are sleeved on the valve sleeve.
The invention has the beneficial effects that:
by arranging the limiting valve, the oil supplementing ring groove on the valve core, the oil supplementing through hole of the valve sleeve, the compensating valve and the oil supplementing pipeline are matched, the over-low negative pressure in the R cavity of the pump head can be unloaded in a hydraulic oil compensating mode, the diaphragm is prevented from being tightly attached to the R plate, the loss of the R plate to the diaphragm is also avoided, and the redundant hydraulic oil in the hydraulic sealing cavity can be discharged by arranging the safety valve and the high-pressure pipeline, so that the damage of the over-high pressure to the diaphragm in the discharging process is avoided, the service life of the diaphragm is prolonged, and the safe operation of equipment is also ensured; the metering accuracy of the hydraulic diaphragm metering pump is improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic structural view of a limiting valve in the structure of the invention.
Fig. 3 is a schematic view of a safety valve in the structure of the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings.
As shown in fig. 1-3: a hydraulic diaphragm metering pump with pressure-equalizing and limiting oil compensation comprises a front pump head 1, a rear pump head 2, an R plate 3, a diaphragm 4, a safety valve 5, a compensation valve 6, a limiting valve 7 and a cylinder sleeve assembly 8, wherein the hydraulic part is provided with the front pump head 1, the rear pump head 2, the R plate 3, the diaphragm 4, the safety valve 5, the compensation valve 6, the limiting valve; the inner side of the front pump head 1 is provided with a parabolic front pump head R cavity 1-0, the diaphragm 4 covers the front pump head R cavity 1-0, the R plate 3 buckles the outer edge of the diaphragm 4, the rear pump head 2 is hermetically connected with the front pump head 1, the R plate 3 and the diaphragm 4 are positioned between the front pump head 1 and the rear pump head 2, the front pump head R cavity 1-0 is communicated with a conveying pipeline of the front pump head 1, the rear pump head 2 is connected with a cylinder sleeve assembly 8, the cylinder sleeve assembly 8 comprises a cylinder sleeve 8-1 and a plunger 8-2 capable of reciprocating in the cylinder sleeve, the rear pump head 2 is provided with a safety valve 5, the safety valve 5 is communicated with a high-pressure pipeline 2-1 in the rear pump head 2, the high-pressure pipeline 2-1 is communicated with a working pipeline in the rear pump head 2, the working pipeline is communicated with the rear R cavity 2-0 between the R plate 3 and the diaphragm 4, the working pipeline is communicated with a cylinder sleeve cavity of a cylinder sleeve assembly 8, the limiting valve 7 is arranged in the rear pump head 2, the limiting valve 7 comprises a valve core 7-2 and a valve sleeve 7-1, the valve sleeve 7-1 is connected to the rear pump head 2, the valve core 7-2 penetrates through the R plate 3 to be located in the R cavity 2-0 of the rear pump head, an oil supplementing through hole 7-6 is formed in the valve sleeve 7-1, an oil supplementing ring groove 7-7 is formed in the valve core 7-2, one end of the oil supplementing through hole 7-6 is communicated with the cylinder sleeve cavity, the other end of the oil supplementing through hole 7-6 is communicated with an oil supplementing pipeline 2-4 arranged in the rear pump head 2, the compensating valve 6 is arranged on the oil supplementing pipeline 2-4, and the compensating valve 6 is communicated with the oil cavity through the oil.
A hydraulic oil sealed space is formed between the diaphragm 4 and the rear pump head 2.
Suction stroke: when the plunger 8-2 moves backwards, the inner volume of the cylinder sleeve 8-1 is increased to generate negative pressure, the diaphragm 4 moves backwards, the volume between the diaphragm 4 and the front pump head R cavity 1-0 is increased, the suction one-way valve 1-2 of the conveying pipeline is opened, a medium enters the front pump head R cavity 1-0, the diaphragm 4 pushes the valve core 7-1 of the limiting valve 7 to move in the process, the oil supplementing ring groove 7-7 on the valve core 7-2 is communicated with the oil supplementing through hole 7-6 of the valve sleeve 7-1, when the negative pressure exceeds the set value, the compensating valve 6 is opened, hydraulic oil in the oil cavity flows into the rear pump head R cavity 2-0 through the compensating valve 6 and the oil supplementing pipeline 2-3, the pressure of the oil cavity 2-0 in the rear pump head R cavity is balanced with the pressure, and the negative pressure of the diaphragm 4 is relieved.
Discharge stroke: when the plunger piston moves forwards, the plunger piston 8-2 pushes the diaphragm 4 to move forwards through hydraulic oil, the pressure in the R cavity 1-0 of the front pump head rises immediately, the one-way valve 1-1 at the outlet of the conveying pipeline is opened, the diaphragm 4 gradually gets away from the R cavity 2-0 of the rear pump head in the process, the valve core 7-1 in the limiting valve 7 also moves forwards, and the oil supplementing ring groove 7-7 on the valve core 7-2 is disconnected with the oil supplementing through hole 7-6 of the valve sleeve 7-1. If the pressure of the R cavity 2-0 of the rear pump head is too high, the safety valve 5 communicated with the high-pressure pipeline 2-1 is started, excessive hydraulic oil is discharged, and the safe operation of equipment is ensured.
The limiting valve 7 comprises a valve core 7-2, a valve sleeve 7-1 and an O-shaped sealing ring 7-4 sleeved on the valve sleeve 7-1, the valve core 7-2 is sleeved in the valve sleeve 7-1, a return spring 7-3 is arranged between the valve core 7-2 and the valve sleeve 7-1, one end of the valve core 7-2 is provided with a diaphragm limiting stop 7-5, the other end of the valve core 7-2 is provided with a check ring 7-8, and the distance from the diaphragm limiting stop 7-5 to the valve sleeve 7-1 is equal to the distance from the oil supplementing ring groove 7-7 to the oil supplementing through hole 7-6. The fit clearance between the valve core 7-2 and the valve sleeve 7-1 is 0.005-0.008 mm. The stop dog 7-5 has a larger contact surface to act with the diaphragm 4, the check ring 7-8 can limit the valve core 7-2 to move over, the distance from the stop dog 7-5 to the valve sleeve 7-1 is equal to the distance from the oil supplementing ring groove 7-7 to the oil supplementing through hole, the oil supplementing process is effectively controlled, and pressure equalizing in the R cavity 2-0 of the rear pump head is guaranteed. Because the limit valve 7 has high tightness requirement, high reciprocating frequency and high hardness requirement, the limit valve is made of bearing steel.
The safety valve 5 is provided with a recovery pipeline 5-1, and the recovery pipeline 5-1 is communicated with the oil cavity. The recovery pipeline 5-1 can return the hydraulic oil discharged from the high-pressure pipeline 2-1 to the oil cavity.
The safety valve 5, the compensating valve 6 and the limiting valve 7 are connected to the rear pump head 2 through threads. The threaded connection ensures the stability of the installation.
The high-pressure pipeline 2-1 enters a safety valve at two positions.
All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (8)
1. A hydraulic diaphragm metering pump with pressure-equalizing and limiting oil compensation is characterized in that a hydraulic part is provided with a front pump head, a rear pump head, an R plate, a diaphragm, a safety valve, a compensation valve, a limiting valve and a cylinder sleeve assembly; the inboard of preceding pump head is equipped with parabolic preceding pump head R chamber, the diaphragm covers in the front on pump head R chamber, the diaphragm is buckled to the R board and is followed outward, back pump head and preceding pump head sealing connection, R board and diaphragm be in before between pump head and the back pump head, the R chamber of preceding pump head and the pipeline UNICOM of preceding pump head, back pump head and cylinder liner subassembly be connected, the cylinder liner subassembly include the cylinder liner and can be in the cylinder liner reciprocal stopper post, be equipped with the relief valve on the back pump head, the high-pressure pipeline UNICOM in relief valve and the back pump head, high-pressure pipeline and the interior work pipeline UNICOM of back pump head, work pipeline and the back pump head R chamber UNICOM between R board and the diaphragm, work pipeline and the cylinder liner chamber UNICOM of cylinder liner subassembly, limit valve set up in the pump head of back, limit valve contains case and valve barrel, the valve barrel is connected on the pump head of back, the case passes the R board and is in back pump head R intracavity, the valve barrel on be provided with the oil supplementing through-hole, be equipped with the oil supplementing annular on the case, oil supplementing through-hole one end and the oil supplementing pipeline UNICOM that cylinder liner chamber UNICOM other end and back pump head set up, the compensating valve set up on the oil supplementing pipeline, the compensating valve passes through oil supplementing pipeline and oil pocket UNICOM.
2. The novel hydraulic diaphragm metering pump with the pressure equalizing and limiting oil supplementing functions as claimed in claim 1, wherein the limiting valve comprises a valve core, a valve sleeve and an O-shaped sealing ring sleeved on the valve sleeve, the valve core is sleeved in the valve sleeve, a return spring is arranged between the valve core and the valve sleeve, a diaphragm limiting stop is arranged on one section of the valve core, a retaining ring is arranged on the other end of the valve core, and the distance from the diaphragm limiting stop to the valve sleeve is equal to the distance from the oil supplementing ring groove to the oil supplementing through hole.
3. The novel hydraulic diaphragm metering pump with the pressure equalizing and limiting oil supplementing functions as claimed in claim 1, wherein the fit clearance between the valve core and the valve sleeve is 0.005-0.008 mm.
4. The novel hydraulic diaphragm metering pump with pressure equalizing and oil supplementing functions as claimed in claim 1, wherein a recovery pipeline is arranged on the safety valve, and the recovery pipeline is communicated with the oil cavity.
5. The novel hydraulic diaphragm metering pump with the pressure equalizing and the limiting functions as claimed in claim 1, wherein the safety valve, the compensating valve and the limiting valve are connected to the rear pump head through threads.
6. The novel hydraulic diaphragm metering pump with pressure equalizing and oil supplementing functions as claimed in claim 1, wherein the high-pressure pipeline enters the safety valve from two positions.
7. The novel hydraulic diaphragm metering pump with pressure equalizing and limiting oil supplementing functions as claimed in claim 1, wherein two O-shaped sealing rings are sleeved on the valve sleeve.
8. The novel hydraulic diaphragm metering pump with the function of equalizing pressure and limiting oil supplementation according to claim 3, wherein the valve core, the valve sleeve, the stop block and the check ring are made of bearing steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011417312.4A CN112539164A (en) | 2020-12-07 | 2020-12-07 | Hydraulic diaphragm metering pump with pressure-equalizing and limiting oil supplementing functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011417312.4A CN112539164A (en) | 2020-12-07 | 2020-12-07 | Hydraulic diaphragm metering pump with pressure-equalizing and limiting oil supplementing functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112539164A true CN112539164A (en) | 2021-03-23 |
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ID=75016189
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011417312.4A Pending CN112539164A (en) | 2020-12-07 | 2020-12-07 | Hydraulic diaphragm metering pump with pressure-equalizing and limiting oil supplementing functions |
Country Status (1)
| Country | Link |
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| CN (1) | CN112539164A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033652A (en) * | 2021-11-24 | 2022-02-11 | 中国石油化工股份有限公司 | Method for adjusting valve element lift of oil supplementing and discharging valve of high-pressure coal slurry pump for coal gasification |
| CN114837912A (en) * | 2022-05-17 | 2022-08-02 | 中轨科泰(河北)铁路设备有限公司 | Constant-displacement wheel-pressure oil pump and automatic equipment comprising same |
| CN115263708A (en) * | 2022-07-13 | 2022-11-01 | 德帕姆(杭州)泵业科技有限公司 | Metering pump for high-performance micro-conveying |
-
2020
- 2020-12-07 CN CN202011417312.4A patent/CN112539164A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033652A (en) * | 2021-11-24 | 2022-02-11 | 中国石油化工股份有限公司 | Method for adjusting valve element lift of oil supplementing and discharging valve of high-pressure coal slurry pump for coal gasification |
| CN114033652B (en) * | 2021-11-24 | 2023-03-24 | 中国石油化工股份有限公司 | Method for adjusting valve element lift of oil supplementing and discharging valve of high-pressure coal slurry pump for coal gasification |
| CN114837912A (en) * | 2022-05-17 | 2022-08-02 | 中轨科泰(河北)铁路设备有限公司 | Constant-displacement wheel-pressure oil pump and automatic equipment comprising same |
| CN114837912B (en) * | 2022-05-17 | 2023-09-22 | 众和科泰(北京)科技有限公司 | Constant-displacement wheel-pressure oil pump and automation equipment comprising same |
| CN115263708A (en) * | 2022-07-13 | 2022-11-01 | 德帕姆(杭州)泵业科技有限公司 | Metering pump for high-performance micro-conveying |
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