CN113566016A - Balanced double-acting regulating valve - Google Patents
Balanced double-acting regulating valve Download PDFInfo
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- CN113566016A CN113566016A CN202110848926.6A CN202110848926A CN113566016A CN 113566016 A CN113566016 A CN 113566016A CN 202110848926 A CN202110848926 A CN 202110848926A CN 113566016 A CN113566016 A CN 113566016A
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- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a balanced double-acting regulating valve which comprises a regulating valve, wherein two sides of the regulating valve are respectively in threaded connection with a pipeline through a plurality of thread groups, a pressure gauge is fixedly communicated in the pipeline, and a pressure gauge is fixedly communicated with the bottom of the regulating valve. The balanced double-acting regulating valve can effectively solve the problems that in the prior art, in some industries, because a medium (various flowable substances) has larger pressure difference or flow difference at each part of a pipeline or a container, in order to reduce or balance the difference value, a valve is arranged between corresponding pipelines or containers and used for regulating the relative balance of pressures at two sides, and a conventional balanced regulating valve cannot realize multi-stage pressure reduction and has poor pressure reduction effect, so that the flowable substances generate larger noise when passing through, and simultaneously along with cavitation, the cavitation can damage the surfaces of valve body parts and further increase the noise.
Description
Technical Field
The invention relates to the technical field of regulating valves, in particular to a balanced double-acting regulating valve.
Background
A regulating valve, also known as a control valve, generally consists of an actuator and a valve. If according to the stroke characteristic, the regulating valve can be divided into a straight stroke and an angular stroke; the pneumatic regulating valve, the electric regulating valve and the hydraulic regulating valve can be divided into three types according to the power used by the matched executing mechanism; the method is divided into three types, namely a linear characteristic, an equal percentage characteristic and a parabolic characteristic according to functions and characteristics of the method. The regulating valve is suitable for air, water, steam, various corrosive media, slurry, oil and other media.
In some industries, because a medium (various flowable substances) has a large pressure difference or flow difference in each part of a pipeline or a container, in order to reduce or balance the difference, a valve is installed between the corresponding pipelines or containers to adjust the relative balance of pressures on two sides, a conventional balance regulating valve cannot realize multi-stage pressure reduction and has a poor pressure reduction effect in the use process, so that the flowable substances generate large noise when passing through, and meanwhile, along with cavitation, the cavitation can damage the surfaces of valve body parts to further increase the noise.
Disclosure of Invention
Solves the technical problem
The invention provides a balanced double-acting regulating valve, which can effectively solve the problems that in the prior art, in some industries, because media (various flowable substances) have larger pressure difference or flow difference at each part of a pipeline or a container, in order to reduce or balance the difference, a valve is arranged between corresponding pipelines or containers to regulate the relative balance of pressures at two sides, and a conventional balanced regulating valve cannot realize multi-stage pressure reduction and has poor pressure reduction effect in the using process, so that the flowable substances generate larger noise when passing through, and simultaneously along with cavitation, cavitation can damage the surfaces of valve body parts and further increase the noise.
Technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention provides a balanced double-acting regulating valve which comprises a regulating valve, wherein two sides of the regulating valve are respectively in threaded connection with a pipeline through a plurality of thread groups, a pressure gauge is fixedly communicated in the pipeline, and a pressure gauge is fixedly communicated with the bottom of the regulating valve;
wherein, the governing valve includes the valve body, be provided with the voltage regulator in the valve body, the voltage regulator is through setting up the powerful spring fixedly connected with valve plug in its outside.
Furthermore, the valve body is composed of two groups of reducing hollow round tables, and a plurality of groups of bolts are arranged in the reducing hollow round tables.
Further, the pressure regulator comprises a central control ring block, the outer side of the central control ring block is tightly clamped with the inner groove of the valve body, and a plurality of groups of central fixing rods are connected in the central control ring block in a sliding mode.
Furthermore, a plurality of the middle fixing rods are fixedly connected with a ring plate at one end far away from the middle control ring block.
Furthermore, one side, far away from the middle fixing rod, of the ring plate is fixedly connected with one end of the strong spring, and the outer side of the ring plate is connected with the inner wall of the valve body in a sliding mode.
Furthermore, the control ring piece intussuseption is filled with hydraulic oil, the control ring piece internal fixation intercommunication has the booster, the booster outside is through inseparable block in sealing washer and the valve body.
Furthermore, the supercharger comprises an oil pressure pipe, and the oil pressure pipe is communicated with the interior of the central control ring block through a hard pipe arranged at the bottom of the oil pressure pipe.
Further, the inner wall of the oil pressure pipe is connected with a piston in a sliding mode, the top of the piston is connected with a threaded rod in a rotating mode, the outer side of the threaded rod is connected with the inner thread of the oil pressure pipe through a thread group, and the top end of the threaded rod is fixedly connected with a hand lever.
Furthermore, the valve plug comprises a porous plug core, the outer side of the porous plug core is fixedly connected with one side of the strong spring, one side of the porous plug core, which is far away from the strong spring, is fixedly connected with a porous valve core, and a plurality of groups of plug holes are formed in the porous plug core.
Furthermore, a plurality of groups of valve holes are formed in the porous valve core, a plurality of groups of inner sliding rods are connected in the porous valve core in a sliding mode, the outer end of each inner sliding rod is fixedly connected with a reset plate, and a plurality of restoring springs are sleeved on the outer sides of the inner sliding rods.
Advantageous effects
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
when flowable substances are introduced into the right end of the pipeline, the pressure in the pipeline on the right side of the regulating valve is continuously increased, the initial flowable substances flow in through the porous valve core valve hole on the valve plug to play a primary decompression role, the subsequent porous valve core and the porous valve core are pushed by the pressure of the flowable substances to move towards one side close to the regulating valve, the strong spring is compressed, a large amount of flowable substances flow in through a gap between the porous valve core and the valve body and flow into the plug hole of the porous valve core, the porous valve core and the porous valve core play a secondary decompression role together, and meanwhile, the porous valve core and the porous valve core are respectively provided with the plug hole and the valve hole, so that the convection of the flowable substances is facilitated, the damage of cavitation to the surfaces of valve body parts is prevented, the noise is reduced, the reset plate is designed to be a round surface convex block type, and when the flowable substances flow, the right reset plate and the porous valve core are closed, the left reset plate is separated from the porous plug core by thrust, and under the combined action of the inner slide rod and the recovery spring, the three-stage pressure reduction effect is realized on flowable substances, so that compared with a common regulating valve, the multi-stage pressure reduction effect is favorable for the balance of flow rapidly reached by two sides, and meanwhile, the multi-stage pressure reduction effect has a good noise reduction effect and is favorable for quiet environment use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of a partial cross-section of the present invention;
FIG. 3 is a schematic view of a compressed, three-dimensional, partially sectioned structure according to the present invention;
FIG. 4 is a schematic structural diagram of a three-dimensional layer structure according to the present invention;
fig. 5 is a schematic structural diagram of a three-dimensional partial section of the voltage regulator of the present invention;
FIG. 6 is a perspective, partially cross-sectional, schematic view of a valve plug according to the present invention.
The reference numerals in the drawings denote: 1-regulating valve; 11-a valve body; 12-a voltage regulator; 121-a central control ring block; 122-a middle fixing rod; 123-ring plate; 124-a supercharger; 1241-oil pressure tube; 1242-piston; 1243-threaded rod; 1244-handle bar; 13-a strong spring; 14-a valve plug; 141-a porous plug core; 142-a porous cartridge; 143-an inner slide bar; 144-a reset plate; 145-a restoring spring; 2-a pipeline; 3-a pressure gauge; 4-pressure measuring device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be further described with reference to the following examples.
Example (b):
referring to fig. 1-6, the present invention provides a technical solution: a balanced double-acting regulating valve comprises a regulating valve 1, wherein two sides of the regulating valve 1 are respectively in threaded connection with a pipeline 2 through a plurality of thread groups, internal components of the regulating valve 1 are designed to be symmetrical, the directionality of a product is not required to be considered in the installation process, the installation is convenient, a pressure gauge 3 is fixedly communicated in the pipeline 2, and a pressure gauge 4 is fixedly communicated at the bottom of the regulating valve 1;
wherein, governing valve 1 includes valve body 11, is provided with voltage regulator 12 in the valve body 11, and voltage regulator 12 is through setting up strong spring 13 fixedly connected with valve plug 14 in its outside.
The valve body 11 is composed of two groups of reducing hollow round tables, which is convenient for the flowing of flowable materials, and a plurality of groups of bolts are arranged in the reducing hollow round tables.
The pressure regulator 12 comprises a central control ring block 121, the outer side of the central control ring block 121 is tightly clamped with an inner groove of the valve body 11, and a plurality of groups of central fixing rods 122 are connected in the central control ring block 121 in a sliding mode.
One end of the middle fixing rod 122 far away from the middle control ring block 121 is fixedly connected with a ring plate 123.
One side of the ring plate 123 far away from the middle fixing rod 122 is fixedly connected with one end of the strong spring 13, and the outer side of the ring plate 123 is connected with the inner wall of the valve body 11 in a sliding mode.
The control ring block 121 is filled with hydraulic oil, the control ring block 121 is fixedly communicated with a supercharger 124, and the outer side of the supercharger 124 is tightly clamped with the valve body 11 through a sealing ring to play a sealing role.
The pressure booster 124 includes an oil pressure pipe 1241, and the oil pressure pipe 1241 is connected to the central control ring block 121 through a hard pipe disposed at the bottom thereof.
The inner wall of the oil pressure pipe 1241 is connected with a piston 1242 in a sliding manner, the top of the piston 1242 is connected with a threaded rod 1243 in a rotating manner, the outer side of the threaded rod 1243 is connected with the inner thread of the oil pressure pipe 1241 through a thread group, and the top end of the threaded rod 1243 is fixedly connected with a hand lever 1244 which is convenient to rotate manually.
The valve plug 14 includes a porous plug core 141, the flowable substance flows in through the gap between the porous plug core 141 and the valve body 11, and flows into the plug holes of the porous plug core 141 to perform a secondary decompression function, the outer side of the porous plug core 141 is fixedly connected with one side of the strong spring 13, the porous plug core 141 is fixedly connected with the porous plug core 142 away from one side of the strong spring 13, and a plurality of groups of plug holes are formed in the porous plug core 141, so that convection of the flowable substance is facilitated, damage to the surface of a valve body part due to cavitation is prevented, and noise is reduced.
A plurality of groups of valve holes are formed in the porous valve core 142, initially flowable substances flow in through the valve holes of the porous valve core 142 on the valve plug 14 and play a role in primary pressure reduction, a plurality of groups of inner sliding rods 143 are connected in the porous valve core 142 in a sliding mode, the outer ends of the inner sliding rods 143 are fixedly connected with reset plates 144, the outer sides of the inner sliding rods 143 are sleeved with restoring springs 145, under the combined action of the inner sliding rods 143 and the restoring springs 145, a tertiary pressure reduction effect is achieved on the flowable substances, multi-stage pressure reduction is achieved, flow balance can be achieved rapidly on two sides, and a good noise reduction effect is achieved.
When the balance type double-acting regulating valve is used, the balance type double-acting regulating valve is connected between corresponding pipelines or containers, flowable substances are led into the right end of the pipeline 2, the pressure in the pipeline on the right side of the regulating valve 1 is continuously increased, the initially flowable substances flow in through the valve hole of the porous valve core 142 on the valve plug 14, the subsequent porous valve core 142 and the porous plug core 141 are pushed by the pressure of the flowable substances to move to one side close to the regulating valve 1, the powerful spring 13 is compressed, a large amount of flowable substances flow in through a gap between the porous plug core 141 and the valve body 11 and flow into the plug hole of the porous plug core 141, at the same time, the flowable material flows out through the left valve plug 14, the initially flowable material flows out through the valve hole of the porous valve plug 142 on the left valve plug 14, when the pressure in the porous valve plug 141 increases, urging the reset plate 144 to move away from the porous spool 142, the reset spring 145 compresses, the flowable material flows out from the clearance between the plug hole of the porous plug core 141 and the reset plate 144;
referring to fig. 1-4 and fig. 6, when the balanced double-acting regulating valve is connected between corresponding pipelines or containers, the internal components of the regulating valve 1 are designed to be symmetrical, in the installation process, the directionality of the product does not need to be considered, the installation is convenient, and meanwhile, in some special occasions, when the flowable substance in the pipeline needs to flow reversely, the balanced double-acting regulating valve can play a role of regulating the pressure in two directions, the universality is high, the system regulation is convenient, when the flowable substance is introduced into the right end of the pipeline 2, the pressure in the pipeline on the right side of the regulating valve 1 is continuously increased, the initial flowable substance flows in through the valve hole of the porous valve core 142 on the valve plug 14, the primary pressure reduction function is played, the subsequent porous valve core 142 and the porous plug core 141 are pushed by the pressure of the flowable substance to move to one side close to the regulating valve 1, the powerful spring 13 is compressed, and a large amount of flowable substance flows in through the gap between the porous plug core 141 and the valve body 11, the fluid flows into the plug hole of the porous plug core 141, the porous valve core 142 and the porous plug core 141 jointly play a role of secondary decompression, meanwhile, the porous plug core 141 and the porous valve core 142 are respectively provided with the plug hole and the valve hole, the convection of the flowable substance is facilitated, the cavitation is prevented from damaging the surface of a valve body part, the noise is reduced, meanwhile, the flowable substance flows out through the left valve plug 14, the initially flowable substance flows out through the valve hole of the porous plug core 142 on the left valve plug 14, when the pressure in the porous plug core 141 is increased, the reset plate 144 is pushed to move to the side far away from the porous valve core 142, the reset spring 145 is compressed, the flowable substance flows out from the gap between the plug hole of the porous plug core 141 and the reset plate 144, the reset plate 144 is designed into a round surface convex block type, when the flowable substance flows, the right reset plate 144 is closed with the porous valve core 142, and the left reset plate 144 is pushed to separate from the porous plug core 141, under the combined action of the inner sliding rod 143 and the restoring spring 145, the three-stage pressure reduction effect is realized on the flowable substance, compared with a common regulating valve, the multi-stage pressure reduction effect is realized, the two sides can quickly reach the flow balance, and meanwhile, the multi-stage pressure reduction effect has a good noise reduction effect and is favorable for the use in a quiet environment;
referring to fig. 3 and 5, in an initial state, the valve plug 14 is pushed by the strong spring 13, a variable diameter end face of the valve plug 14 is attached to an end face of a variable diameter hollow circular truncated cone of the valve body 11, when the system adjusts the flow, a hand rod 1244 on the pressure booster 124 is manually rotated to drive the threaded rod 1243 to rotate around the inner wall of the oil pressure pipe 1241, the piston 1242 is pushed to slide, hydraulic oil in the oil pressure pipe 1241 enters or flows out of the middle control ring block 121, the middle fixed rod 122 is driven to slide, the ring plate 123 is driven to slide, the elastic force of the strong spring 13 on the valve plug 14 is changed, when a flowable substance passes through, the pressure on two sides of the valve plug 14 changes along with the change of the elastic force of the strong spring 13, the flowing substance can adjust the flow passing through the valve plug 14 under the same pressure value, the hand rod 1244 is rotated according to the display of the pressure gauge 3, the use of different flow values is met, and the universality is high.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A balanced double-acting regulating valve is characterized in that: the pressure-measuring device comprises an adjusting valve (1), wherein two sides of the adjusting valve (1) are respectively connected with a pipeline (2) through a plurality of groups of thread groups, a pressure gauge (3) is fixedly communicated in the pipeline (2), and the bottom of the adjusting valve (1) is fixedly communicated with a pressure measuring device (4);
wherein, governing valve (1) includes valve body (11), be provided with voltage regulator (12) in valve body (11), voltage regulator (12) are through setting up strong spring (13) fixedly connected with valve plug (14) in its outside.
2. The balanced, double-acting regulator valve of claim 1, wherein: the valve body (11) is composed of two groups of reducing hollow round tables, and a plurality of groups of bolts are arranged in the reducing hollow round tables.
3. The balanced, double-acting regulator valve of claim 1, wherein: the pressure regulator (12) comprises a central control ring block (121), the outer side of the central control ring block (121) is tightly clamped with an inner groove of the valve body (11), and a plurality of groups of middle fixing rods (122) are connected in the central control ring block (121) in a sliding mode.
4. A balanced, double-acting regulator valve according to claim 3, wherein: and one end of the middle fixing rod (122) far away from the middle control ring block (121) is fixedly connected with a ring plate (123).
5. The balanced, double-acting regulator valve of claim 4, wherein: one side, far away from the middle fixing rod (122), of the annular plate (123) is fixedly connected with one end of the strong spring (13), and the outer side of the annular plate (123) is connected with the inner wall of the valve body (11) in a sliding mode.
6. A balanced, double-acting regulator valve according to claim 3, wherein: the hydraulic oil is filled in the central control ring block (121), the supercharger (124) is fixedly communicated in the central control ring block (121), and the outer side of the supercharger (124) is tightly clamped with the valve body (11) through a sealing ring.
7. The balanced, double-acting regulator valve of claim 6, wherein: the supercharger (124) comprises an oil pressure pipe (1241), and the oil pressure pipe (1241) is communicated with the interior of the central control ring block (121) through a hard pipe arranged at the bottom of the oil pressure pipe.
8. The balanced, double-acting regulator valve of claim 7, wherein: the inner wall of the oil pressure pipe (1241) is connected with a piston (1242) in a sliding mode, the top of the piston (1242) is connected with a threaded rod (1243) in a rotating mode, the outer side of the threaded rod (1243) is connected with the inner thread of the oil pressure pipe (1241) through a thread group, and the top end of the threaded rod (1243) is fixedly connected with a hand lever (1244).
9. The balanced, double-acting regulator valve of claim 1, wherein: the valve plug (14) comprises a porous plug core (141), the outer side of the porous plug core (141) is fixedly connected with one side of the strong spring (13), the porous plug core (141) is far away from one side of the strong spring (13) and is fixedly connected with a porous valve core (142), and a plurality of groups of plug holes are formed in the porous plug core (141).
10. The balanced, double-acting regulator valve of claim 9, wherein: a plurality of groups of valve holes are formed in the porous valve core (142), a plurality of groups of inner sliding rods (143) are connected in the porous valve core (142) in a sliding mode, the outer ends of the inner sliding rods (143) are fixedly connected with a reset plate (144), and a plurality of restoring springs (145) are sleeved on the outer sides of the inner sliding rods (143).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110848926.6A CN113566016B (en) | 2021-07-27 | 2021-07-27 | Balance type double-acting regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110848926.6A CN113566016B (en) | 2021-07-27 | 2021-07-27 | Balance type double-acting regulating valve |
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| Publication Number | Publication Date |
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| CN113566016A true CN113566016A (en) | 2021-10-29 |
| CN113566016B CN113566016B (en) | 2023-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110848926.6A Active CN113566016B (en) | 2021-07-27 | 2021-07-27 | Balance type double-acting regulating valve |
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| CN (1) | CN113566016B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH576092A5 (en) * | 1975-01-22 | 1976-05-31 | Nussbaum & Co Ag R | |
| CN104481846A (en) * | 2014-12-12 | 2015-04-01 | 贵州中电振华精密机械有限公司 | Double-function balance air inlet valve |
| CN211550907U (en) * | 2019-12-12 | 2020-09-22 | 青岛松山机械有限公司 | Pressure reducing valve front end assembly |
| CN212177969U (en) * | 2020-04-24 | 2020-12-18 | 上海诺科泵业有限公司 | One-way valve |
| CN112728169A (en) * | 2020-12-16 | 2021-04-30 | 陈忠菊 | Check valve with adjusting function |
-
2021
- 2021-07-27 CN CN202110848926.6A patent/CN113566016B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH576092A5 (en) * | 1975-01-22 | 1976-05-31 | Nussbaum & Co Ag R | |
| CN104481846A (en) * | 2014-12-12 | 2015-04-01 | 贵州中电振华精密机械有限公司 | Double-function balance air inlet valve |
| CN211550907U (en) * | 2019-12-12 | 2020-09-22 | 青岛松山机械有限公司 | Pressure reducing valve front end assembly |
| CN212177969U (en) * | 2020-04-24 | 2020-12-18 | 上海诺科泵业有限公司 | One-way valve |
| CN112728169A (en) * | 2020-12-16 | 2021-04-30 | 陈忠菊 | Check valve with adjusting function |
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| Publication number | Publication date |
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| CN113566016B (en) | 2023-05-12 |
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Address after: 325000 high tech Industrial Park, Nanbin street, Rui'an City, Wenzhou City, Zhejiang Province Applicant after: Kairuite Valve Group Co.,Ltd. Address before: 325000 high tech Industrial Park, Nanbin street, Rui'an City, Wenzhou City, Zhejiang Province Applicant before: KAIRUITE VALVE CO.,LTD. |
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