CN214007471U - Leakage-free plunger type metering pump head - Google Patents
Leakage-free plunger type metering pump head Download PDFInfo
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- CN214007471U CN214007471U CN202022612959.4U CN202022612959U CN214007471U CN 214007471 U CN214007471 U CN 214007471U CN 202022612959 U CN202022612959 U CN 202022612959U CN 214007471 U CN214007471 U CN 214007471U
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- 238000007789 sealing Methods 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 239000012782 phase change material Substances 0.000 claims abstract description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 6
- 239000010937 tungsten Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000008676 import Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 7
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Abstract
The utility model discloses a no leakage plunger type measuring pump head, concretely relates to measuring pump head equipment technical field, including the pump head, the inner chamber of pump head is equipped with plunger and wear-resisting pipe, and the top surface and the bottom surface of pump head fixed mounting respectively have import check valve subassembly and export check valve subassembly, and the inside of pump head is equipped with the passageway, and the inside of pump head is equipped with fills the chamber, and the side fixed mounting of pump head has sealed lid, and the inner chamber bottom surface of pump head is equipped with the backward flow subassembly, and the bottom surface of pump head is equipped with the early warning subassembly. According to the scheme, the wear-resistant pipe gathers a trace amount of medium entering the pump head at the inlet of the backflow assembly, the plunger presses the medium to enable the medium to prop open the sealing steel ball and then flow back into the channel, the medium backflow function is achieved, the tungsten steel wear-resistant pipe and the phase-change material absorbing friction heat reduce friction loss, the service life of the device is prolonged, the medium leakage is avoided through multi-layer sealing, the early warning assembly reflects the good degree of the sealing condition visually, and equipment maintenance is facilitated.
Description
Technical Field
The utility model relates to a measuring pump head equipment technical field, more specifically say, the utility model relates to a no leakage plunger type measuring pump head.
Background
Metering pumps are also referred to as dosing pumps or proportional pumps. The metering pump is a special volumetric pump which can meet the requirements of various strict process flows, can realize stepless regulation of the flow rate within the range of 0-100 percent and is used for conveying liquid (particularly corrosive liquid). In general, the hydraulic end of a metering pump is divided into two structures, a plunger type and a hydraulic diaphragm type. The plunger type hydraulic end has simple structure and lower cost, but the medium has little leakage. The hydraulic diaphragm type hydraulic end has a complex structure and high cost, but the medium does not leak.
Plunger leakage in plunger metering pumps is a major original problem and is considered to be reasonable. The leakage amount is qualified as long as the leakage amount is not more than 5-7 drops per minute, so that the existing metering pump has the leakage problem more or less, but the plunger metering pump is inevitably applied to the harmful liquid under the process requirement along with the continuous pursuit of protection of the industry and the environment, and particularly, the plunger metering pump is widely applied to chemical engineering and petroleum. Solving the problem of leakage in plunger metering pumps is therefore an inevitable direction of industrial development.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned defects of the prior art, the embodiment of the utility model provides a no-leakage plunger type metering pump head, drive the plunger to reciprocate through external equipment, the guiding gutter that utilizes the plunger side to set up guides the trace medium that gets into the pump head inner chamber into one side of wear-resisting pipe, the medium gathers the bottom of pump head inner chamber one side through the through-hole, utilize the motion of plunger, exert pressure to the medium that gathers, make the medium push open the sealed steel ball of butt in the seal cover under spring pressure, finally get into the passageway through the backward flow subassembly, and flow out the device from the export check valve subassembly, in order to solve the problem that the device plunger leaked now, through wear-resisting pipe and plunger cooperation, the life of the extension device, utilize the phase change material placed in the packing intracavity portion to absorb the plunger and carry out the heat that the reciprocating motion in-process with wear-resisting pipe friction production, reduce the friction loss with pump head inner, utilize the sealing washer will seal up each cavity, monitor the device internal seal effect through the early warning subassembly, the condition of prevention plunger leakage.
In order to solve the technical problem, the utility model provides a following technical scheme: a leakage-free plunger type metering pump head comprises a pump head, wherein a plunger is arranged in an inner cavity of the pump head, a wear-resistant pipe is movably sleeved on the outer side of the plunger, an inlet check valve assembly is fixedly installed on the top surface of the pump head, an outlet check valve assembly is fixedly installed on the bottom surface of the pump head, a channel is arranged in the pump head, a filling cavity is arranged in the pump head, a sealing cover is fixedly installed on the side surface of the pump head, a positioning bolt is fixedly installed on the side surface of the sealing cover, a backflow assembly is arranged on the bottom surface of the inner cavity of the pump head, and an early warning assembly is arranged on the bottom surface of the pump head;
the backflow assembly comprises a base, the base is fixedly installed on the side face of the channel, a spring is fixedly installed on the side face of the base, one end of the spring is fixedly sleeved with a T-shaped stop block, the side face of the T-shaped stop block is abutted with a sealing steel ball, the side face of the sealing steel ball is abutted with a sealing sleeve, and the side face of the sealing sleeve is fixedly sleeved with a second sealing ring;
the early warning subassembly includes the thread bush, the top of thread bush is equipped with the inlet, the fixed cover in the outside of inlet has connect the third sealing washer, the fixed cover in the outside of thread bush has connected the gasket, the fixed cover in bottom of thread bush has connected and has held the pipe.
Preferably, the axle center of the pump head and the axle center of the plunger are kept in the same straight line, the outer diameter of the plunger is smaller than the diameter of the inner cavity of the pump head, the length of the plunger is larger than that of the inner cavity of the pump head, and a plurality of guide grooves are formed in the outer side of one end of the plunger.
Preferably, the inner wall of the wear-resistant pipe is in clearance fit with the outer surface of the plunger, the length of the wear-resistant pipe is smaller than that of the inner cavity of the pump head, and a plurality of through holes are formed in the bottom of one side of the wear-resistant pipe.
Preferably, the inside of base is equipped with the through-hole, the surface of spring and the inner wall contactless of pump head, the side of T type dog is equipped with the hemisphere recess that agrees with the surface of sealed steel ball, the side of seal cover and the inner wall butt of pump head, the inner chamber of pump head is equipped with the stair structure who agrees with mutually with the seal cover terminal surface.
Preferably, the wear-resisting pipe is a tungsten steel member, one end of the wear-resisting pipe is provided with a seal, the filling cavity is of an asymmetric structure and is an independent sealing cavity, and the phase-change material is tightly filled in the filling cavity.
Preferably, the inner wall of sealed lid is equipped with first sealing washer, the inner wall of sealed lid has clearance fit with the surface of pump head, positioning bolt's quantity is four and is the symmetric distribution, positioning bolt runs through the side of sealed lid, the surface of pump head is equipped with positioning bolt's fastening screw hole.
Preferably, the threaded sleeve penetrates through the bottom surface of the pump head through threaded connection, the end surface of the liquid inlet is flush with the inner wall of the pump head, the gasket is a soft metal component, the accommodating pipe is a transparent organic glass component, and the surface of the accommodating pipe is provided with capacity scales.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
1. in the scheme, the plunger is driven by external equipment to reciprocate, a guide groove arranged on the side surface of the plunger is used for guiding a trace medium entering the inner cavity of the pump head into one side of the wear-resistant pipe, the medium is gathered to the bottom of one side of the inner cavity of the pump head through the through hole, pressure is applied to the gathered medium by using the movement of the plunger, the medium is pushed open and is abutted against a sealing steel ball of a sealing sleeve under the pressure of a spring, and finally enters a channel through a backflow component and flows out of the device from an outlet one-way valve component, so that the function of medium backflow is realized;
2. in the scheme, the wear-resistant pipe is made of tungsten steel, has a series of excellent performances such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like, is not easy to damage in the process of friction with the plunger, and the phase-change material in the filling cavity can absorb heat generated by friction between the plunger and the wear-resistant pipe in the reciprocating motion process, so that the friction loss between the plunger and the inner wall of the pump head and the wear-resistant pipe after the temperature of the plunger is raised is reduced, and the service life of the device is prolonged;
3. in the above scheme, the pump head is inside to set up a plurality of airtight independent cavitys through the sealing washer, avoids the medium infiltration, has good preventing leakage effect, through will setting up in the inside cavity and the external early warning subassembly UNICOM of keeping away from passageway one end of pump head, realizes the collection to the infiltration medium to the good degree of the inside sealed condition of device is reflected directly perceivedly, is convenient for change or repair the equipment that produces the damage.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the reflow module of the present invention;
FIG. 3 is an assembly view of the structure of the reflow module of the present invention;
fig. 4 is a schematic structural view of the early warning assembly of the present invention;
fig. 5 is a schematic diagram of the plunger structure of the present invention.
[ reference numerals ]
1. A pump head; 2. a plunger; 3. an inlet check valve assembly; 4. an outlet check valve assembly; 5. a channel; 6. a wear resistant tube; 7. filling the cavity; 8. a sealing cover; 9. a reflow assembly; 10. an early warning component; 11. positioning the bolt; 21. a diversion trench; 81. a first seal ring; 91. a base; 92. a spring; 93. a T-shaped stop block; 94. sealing the steel balls; 95. sealing sleeves; 96. a second seal ring; 101. a threaded sleeve; 102. a liquid inlet; 103. a third seal ring; 104. a gasket; 105. the tube is contained.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The embodiment of the present invention provides a pump head of a leakage-free plunger type metering pump as shown in fig. 1 to 5, which comprises a pump head 1, wherein a plunger 2 is arranged in an inner cavity of the pump head 1, a wear-resistant pipe 6 is movably sleeved outside the plunger 2, an inlet check valve assembly 3 is fixedly arranged on the top surface of the pump head 1, an outlet check valve assembly 4 is fixedly arranged on the bottom surface of the pump head 1, a channel 5 is arranged inside the pump head 1, a filling cavity 7 is arranged inside the pump head 1, a sealing cover 8 is fixedly arranged on the side surface of the pump head 1, the inner wall of the sealing cover 8 is in clearance fit with the outer surface of the pump head 1, a first sealing ring 81 is arranged on the inner wall of the sealing cover 8, positioning bolts 11 are fixedly arranged on the side surface of the sealing cover 8, the number of the positioning bolts 11 is four and are symmetrically distributed, the positioning bolts 11 penetrate through the side surface of the sealing cover 8, and fastening screw holes of the positioning bolts 11 are arranged on the outer surface of the pump head 1, the bottom surface of the inner cavity of the pump head 1 is provided with a backflow component 9, and the bottom surface of the pump head 1 is provided with an early warning component 10;
the backflow component 9 comprises a base 91, the base 91 is fixedly installed on the side surface of the channel 5, a spring 92 is fixedly installed on the side surface of the base 91, a T-shaped stop block 93 is fixedly sleeved at one end of the spring 92, a sealing steel ball 94 is abutted against the side surface of the T-shaped stop block 93, a sealing sleeve 95 is abutted against the side surface of the sealing steel ball 94, and a second sealing ring 96 is fixedly sleeved on the side surface of the sealing sleeve 95;
the early warning assembly 10 comprises a threaded sleeve 101, a liquid inlet 102 is formed in the top end of the threaded sleeve 101, a third sealing ring 103 is fixedly sleeved on the outer side of the liquid inlet 102, a gasket 104 is fixedly sleeved on the outer side of the threaded sleeve 101, and a containing pipe 105 is fixedly sleeved on the bottom end of the threaded sleeve 101.
As shown in fig. 1 and 5, the axis of the pump head 1 and the axis of the plunger 2 are kept in the same straight line, the outer diameter of the plunger 2 is smaller than the diameter of the inner cavity of the pump head 1, the length of the plunger 2 is larger than the length of the inner cavity of the pump head 1, a plurality of flow guide grooves 21 are arranged on the outer side of one end of the plunger 2, the inner wall of the wear-resistant pipe 6 is in clearance fit with the outer surface of the plunger 2, the length of the wear-resistant pipe 6 is smaller than the length of the inner cavity of the pump head 1, and a plurality of through holes are formed in the bottom of one side of the wear-resistant pipe 6;
specifically, the diversion trench 21 conveys the trace media entering the inner cavity of the pump head 1 to the through hole of the wear-resistant pipe 6, and finally gathers at the inlet of the backflow component 9, thereby completing the collection of the media entering the device.
As shown in fig. 2 and 3, a through hole is formed in the base 91, the outer surface of the spring 92 is not in contact with the inner wall of the pump head 1, a hemispherical groove engaged with the surface of the sealing steel ball 94 is formed in the side surface of the T-shaped stopper 93, a hemispherical groove engaged with the surface of the sealing steel ball 94 is formed in the side surface of the seal sleeve 95, the side surface of the seal sleeve 95 is abutted against the inner wall of the pump head 1, and a step structure engaged with the end surface of the seal sleeve 95 is formed in the inner cavity of the pump head 1;
specifically, the base 91 communicates the backflow component 9 with the channel 5, the spring 92 abuts the T-shaped stopper 93 and the sealing steel ball 94 against the side surface of the sealing sleeve 95 to form a liquid one-way circulation structure, so that liquid in the device can pass through the backflow component 9 under the pressure of the plunger 2, and a medium in the channel 5 cannot enter the device through the backflow component 9.
As shown in fig. 1, the wear-resistant tube 6 is a tungsten steel member, one end of the wear-resistant tube 6 is provided with a seal, the filling cavity 7 is an asymmetric structure, the filling cavity 7 is an independent sealed cavity, and the phase-change material is tightly filled in the filling cavity 7;
specifically, the wear-resistant pipe 6 has a series of excellent performances such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, and is not easy to damage in the process of rubbing with the plunger 2, and the phase-change material in the filling cavity 7 can absorb heat generated by rubbing with the wear-resistant pipe 6 in the reciprocating motion process of the plunger 2, so that the friction loss between the plunger 2 and the inner wall of the pump head 1 and the wear-resistant pipe 6 after the temperature rise is reduced.
As shown in fig. 1 and 4, the threaded sleeve 101 penetrates through the bottom surface of the pump head 1 through threaded connection, the end surface of the liquid inlet 102 is flush with the inner wall of the pump head 1, the gasket 104 is a soft metal component, the accommodating tube 105 is a transparent organic glass component, and the surface of the accommodating tube 105 is provided with capacity scales;
specifically, the thread bush 101 connects a part of the inner cavity of the pump head 1 with the inside of the early warning assembly 10, and the permeation condition of the medium inside the device is observed through the transparent accommodating tube 105, so that the internal sealing condition of the device can be monitored conveniently.
The working process of the utility model is as follows:
according to the scheme, the plunger 2 is driven by external equipment to reciprocate, a guide groove 21 formed in the side face of the plunger 2 is used for guiding a trace medium entering the inner cavity of the pump head 1 into one side of the wear-resistant pipe 6, the medium is gathered to the bottom of one side of the inner cavity of the pump head 1 through the through hole, pressure is applied to the gathered medium by the movement of the plunger 2, the medium is pushed open to abut against a sealing steel ball 94 of a sealing sleeve 95 under the pressure of a spring 92, finally enters the channel 5 through the backflow component 9 and flows out of the device from the outlet check valve component 4, and the function of medium backflow is achieved
According to the scheme, the wear-resistant pipe 6 is made of tungsten steel, has a series of excellent performances such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, is not easy to damage in the process of rubbing with the plunger 2, the phase-change material in the filling cavity 7 can absorb heat generated by the friction between the plunger 2 and the wear-resistant pipe 6 in the reciprocating motion process, the friction loss between the plunger 2 and the inner wall of the pump head 1 and the wear-resistant pipe 6 after the temperature rise is reduced, and the service life of the device is prolonged;
above-mentioned scheme, 1 inside of pump head sets up a plurality of airtight independent cavitys through the sealing washer, avoids the medium infiltration, has good preventing leakage effect, through will setting up in 1 inside cavity and the external early warning subassembly 10 UNICOM of keeping away from 5 one ends of passageway of pump head, realizes the collection to the infiltration medium to the good degree of the device internal seal condition of reflecting directly perceived is convenient for change or repair the equipment that produces the damage.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;
and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The pump head of the leakage-free plunger type metering pump comprises a pump head (1), wherein a plunger (2) is arranged in an inner cavity of the pump head (1), and is characterized in that a wear-resistant pipe (6) is movably sleeved on the outer side of the plunger (2), an inlet check valve assembly (3) is fixedly installed on the top surface of the pump head (1), an outlet check valve assembly (4) is fixedly installed on the bottom surface of the pump head (1), a channel (5) is arranged in the pump head (1), a filling cavity (7) is arranged in the pump head (1), a sealing cover (8) is fixedly installed on the side surface of the pump head (1), a positioning bolt (11) is fixedly installed on the side surface of the sealing cover (8), a backflow assembly (9) is arranged on the bottom surface of the inner cavity of the pump head (1), and an early warning assembly (10) is arranged on the bottom surface of the pump head (1);
the backflow component (9) comprises a base (91), the base (91) is fixedly installed on the side face of the channel (5), a spring (92) is fixedly installed on the side face of the base (91), a T-shaped stop block (93) is fixedly sleeved at one end of the spring (92), a sealing steel ball (94) is abutted to the side face of the T-shaped stop block (93), a sealing sleeve (95) is abutted to the side face of the sealing steel ball (94), and a second sealing ring (96) is fixedly sleeved on the side face of the sealing sleeve (95);
early warning subassembly (10) are including thread bush (101), the top of thread bush (101) is equipped with inlet (102), the fixed third sealing washer (103) that has cup jointed in the outside of inlet (102), the fixed gasket (104) that has cup jointed in the outside of thread bush (101), the fixed cover in bottom of thread bush (101) has been cup jointed and has been held pipe (105).
2. A non-leakage plunger type metering pump head according to claim 1, wherein the axial center of the pump head (1) and the axial center of the plunger (2) are kept in the same straight line, the outer diameter of the plunger (2) is smaller than the diameter of the inner cavity of the pump head (1), the length of the plunger (2) is larger than the length of the inner cavity of the pump head (1), and a plurality of diversion grooves (21) are arranged outside one end of the plunger (2).
3. The pump head of the non-leakage plunger type metering pump according to claim 1, wherein the inner wall of the wear-resistant pipe (6) is in clearance fit with the outer surface of the plunger (2), the length of the wear-resistant pipe (6) is less than that of the inner cavity of the pump head (1), and a plurality of through holes are formed in the bottom of one side of the wear-resistant pipe (6).
4. The pump head of the non-leakage plunger type metering pump according to claim 1, wherein the base (91) is provided inside with a through hole, the outer surface of the spring (92) is not in contact with the inner wall of the pump head (1), the side surface of the T-shaped stopper (93) is provided with a hemispherical groove engaged with the surface of the sealing steel ball (94), the side surface of the sealing sleeve (95) is abutted against the inner wall of the pump head (1), and the inner cavity of the pump head (1) is provided with a step structure engaged with the end surface of the sealing sleeve (95).
5. The pump head of the non-leakage plunger type metering pump according to claim 1, wherein the wear-resistant tube (6) is a tungsten steel member, a seal is disposed at one end of the wear-resistant tube (6), the filling cavity (7) is an asymmetric structure, the filling cavity (7) is a separate sealed cavity, and the interior of the filling cavity (7) is tightly filled with the phase change material.
6. The pump head of the leakage-free plunger type metering pump according to claim 1, wherein the inner wall of the sealing cover (8) is provided with a first sealing ring (81), the inner wall of the sealing cover (8) is in clearance fit with the outer surface of the pump head (1), the number of the positioning bolts (11) is four and the positioning bolts (11) are symmetrically distributed, the positioning bolts (11) penetrate through the side surface of the sealing cover (8), and the outer surface of the pump head (1) is provided with fastening threaded holes of the positioning bolts (11).
7. The pump head of the non-leakage plunger type metering pump according to claim 1, wherein the threaded sleeve (101) is connected through the bottom surface of the pump head (1) by a screw thread, the end surface of the liquid inlet (102) is flush with the inner wall of the pump head (1), the gasket (104) is a soft metal component, the accommodating tube (105) is a transparent organic glass component, and the surface of the accommodating tube (105) is provided with capacity scales.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022612959.4U CN214007471U (en) | 2020-11-12 | 2020-11-12 | Leakage-free plunger type metering pump head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022612959.4U CN214007471U (en) | 2020-11-12 | 2020-11-12 | Leakage-free plunger type metering pump head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214007471U true CN214007471U (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022612959.4U Expired - Fee Related CN214007471U (en) | 2020-11-12 | 2020-11-12 | Leakage-free plunger type metering pump head |
Country Status (1)
| Country | Link |
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| CN (1) | CN214007471U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117780621A (en) * | 2024-02-28 | 2024-03-29 | 黑龙江永研科技有限公司 | Real-time monitoring and early warning device for sealing performance of valve body of plunger pump and monitoring method thereof |
-
2020
- 2020-11-12 CN CN202022612959.4U patent/CN214007471U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117780621A (en) * | 2024-02-28 | 2024-03-29 | 黑龙江永研科技有限公司 | Real-time monitoring and early warning device for sealing performance of valve body of plunger pump and monitoring method thereof |
| CN117780621B (en) * | 2024-02-28 | 2024-05-24 | 黑龙江永研科技有限公司 | Real-time monitoring and early warning device for sealing performance of valve body of plunger pump and monitoring method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210820 |