CN209414129U - A kind of diaphragm pump diaphragm alarm sealing structure - Google Patents
A kind of diaphragm pump diaphragm alarm sealing structure Download PDFInfo
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- CN209414129U CN209414129U CN201920154798.3U CN201920154798U CN209414129U CN 209414129 U CN209414129 U CN 209414129U CN 201920154798 U CN201920154798 U CN 201920154798U CN 209414129 U CN209414129 U CN 209414129U
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- diaphragm
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- pressure ring
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Abstract
The utility model relates to a kind of diaphragm pump diaphragm alarm sealing structure, including two diaphragms, it is folded with pressure ring between two diaphragms, the edge and pressure ring of two diaphragms are clamped between cylinder body and cylinder cap, radially offer pressure port on pressure ring；Cylinder cap is equipped with a circle flange towards the end face of cylinder body to form installation plunger stage in the end face, and the corresponding end of cylinder body protrudes into installation plunger stage and two diaphragms and pressure ring are clamped between its end face and the bottom surface of installation plunger stage；Protrusion is equipped with a circle annular convex platform to the outer fringe position of the two sides of pressure ring respectively, is respectively equipped with annular groove corresponding with annular convex platform on the end face of cylinder body and the bottom surface of installation plunger stage；Perforative pressure channel is radially offered on flange and is connected to pressure port；Sealing ring is equipped between flange inner wall and outer wall of cylinder block.By diaphragm service life can be improved, by external pressure gauge or sensor instant alarming and can guarantee effective sealing after diaphragm is damaged to effective clamping of diaphragm and creep resistant decrement control mode.
Description
Technical field
The utility model belongs to the technical field pumped in fluid varactor machine, and in particular to a kind of diaphragm pump diaphragm alarm
Sealing structure.
Background technique
The working principle of diaphragm pump is agitated back and forth by the intracorporal diaphragm of cylinder, so that the volume for changing medium chamber reaches
The purpose of sucking and discharge pumped medium.The operating condition of diaphragm is more severe, especially the effect in high temperature and pressure and alternating load
Under, it is easy broken invalid or continues creep to deviate to cause to fail, the service life of diaphragm is shorter.
At present also about the research of membrane ruptures context of detection, such as CN204476717U, a kind of metal diaphragm is disclosed
Safety check-up structure, but pressure is surveyed by pressure gauge and is alarmed, only treatment measures after a kind of membrane ruptures；Research direction is also answered
This falls in how to extend in the service life of diaphragm, and is further improved.
Summary of the invention
For the above-mentioned deficiency of the prior art, the technical problem to be solved by the present invention is to provide a kind of diaphragm pump diaphragms
Alarm sealing structure, the problem for avoiding the easy lasting creep of diaphragm from causing service life short, the service life of acquirement raising diaphragm,
The effect that energy instant alarming and guarantee effectively seal after diaphragm is damaged.
In order to solve the above technical problems, the utility model adopts the following technical solution:
A kind of diaphragm pump diaphragm alarm sealing structure is folded with pressure between two diaphragms including two diaphragms being set side by side
Ring, the edge and pressure ring of two diaphragms are clamped between cylinder body and cylinder cap, and perforative pressure is radially offered on pressure ring
Hole；The cylinder cap is equipped with a circle flange towards the end face of cylinder body to form installation plunger stage in the end face, and the corresponding end of cylinder body is stretched
Enter the installation plunger stage and the edge of two diaphragm and pressure ring are clamped between its end face and the bottom surface of installation plunger stage；It takes
Protrusion is equipped with a circle annular convex platform to the outer fringe position of the two sides of pressure ring respectively, divides on the end face of cylinder body and the bottom surface of installation plunger stage
It She You not annular groove corresponding with annular convex platform；Perforative pressure channel, the pressure are radially offered on the flange
Channel is connected to pressure port；Sealing ring is equipped between the inner wall of the flange and the outer wall of cylinder body.
The diaphragm alarm sealing structure of the utility model, the edge and pressure ring of two diaphragms are clamped by cylinder body and cylinder cap,
It is provided with annular convex platform simultaneously and corresponding annular groove clamps the edge of diaphragm by inner support, external pressure, presss from both sides diaphragm
Holding position has certain predeformation, and different from the plane method of clamping in existing structure, the utility model passes through the pre- change of diaphragm
Shape improves clamping effect, even if diaphragm retaining part pretightning force declines, due to the effect of diaphragm predeformation, in diaphragm deflection mistake
Just be not easy to occur in journey diaphragm edge to center sliding, continue the phenomenon that creep is deviate from, therefore diaphragm during flexure not
It will appear creeping phenomenon, the service life of diaphragm can be effectively improved；If breakage occurs in diaphragm, pressure change can pass through pressure port
It is transmitted with pressure channel, is shown, alarmed by the pressure gauge or pressure sensor of the connection of pressure channel outer end, wherein pass through flange
Setting, open up pressure channel radially, can a direct drilling be process, reduce difficulty of processing, flange inner wall
Sealing ring is equipped between outer wall of cylinder block, even if diaphragm is damaged, the sealed connection of diaphragm is failed, hydraulic oil or medium will not be from
It is leaked at this, strengthens sealing reliability when diaphragm breakage.
Above-mentioned technical proposal is further improved, protrusion is equipped with positive stop lug boss, the positive stop lug boss on the outer wall of the cylinder body
It is opposite with the end face of the flange and there is gap for controlling diaphragm pre compressed magnitude between positive stop lug boss and flange.
In this way, design when according to use the factors such as temperature, pressure and membrane thicknesses determine diaphragm installation when diaphragm it is pre-
Decrement --- i.e. for controlling the gap of diaphragm pre compressed magnitude (from structurally reacting).When assembly, connected by bolt mode
Cylinder block and head, by the edge of two diaphragms and pressure ring tentatively clamp and then further fastening, eliminate this be used to control diaphragm it is pre-
Pinch seal effect is improved by control diaphragm predeformation amount and compression limit, and makes cylinder body limit convex in the gap of decrement
The direct rigid contact of the both ends of the surface of platform and head flange, in this way, diaphragm is compacted by the pre compressed magnitude of design, it is further accurate to protect
Pretightning force has been demonstrate,proved, and cylinder body with cylinder cap is rigidly abutted by corresponding boss, it would not be because diaphragm be in alternation in use process
It causes to continue creep and make diaphragm abjection failure or be extruded repeatedly thinning and lose sealing effect under load effect, and then effectively
Extend diaphragm service life.It should be noted that it is opposite, in existing similar structures, although being all by cylinder body and cylinder cap
Diaphragm is clamped, but is abutted between cylinder body and cylinder cap without rigidity, the decrement of nonmetallic diaphragm fails to obtain by design effectively
There are gap between the cylinder body and cylinder cap of control and final connection status, it will result in diaphragm in use process and made by alternating load
With, continue creep and deviate from or be extruded repeatedly thinning and lose sealing effect.
Further, the pressure ring is made of two pressure ring plates of radially double of subdivision, in two pressure ring plate phases
Pair face on open up respectively fluted and be formed as the pressure port.
In this way, reducing the difficulty of processing of pressure port, and guarantee the validity of pressure port；The thickness of pressure ring itself is relatively thin,
Radial drilling processing pressure port difficulty is larger, is easy to bore partially and cause to scrap, by the opposite form of two pressure ring plates, take
Milling Process or carve groove on the opposite face of pressure ring piece, processed instead of the drilling of the pressure port of integral type pressure ring, reduce plus
Work difficulty, meanwhile, groove is located on the opposite face of two pressure ring plates, rather than towards diaphragm, diaphragm becomes when not will cause clamping
The problem of shape ties up recess space and pressure port is caused to fail, it is ensured that groove it is unobstructed to ensureing validity.
Further, the groove in pressure ring plate is circumferentially uniformly distributed several of equal part；The internal diameter of the one circle flange
Corresponding with the outer diameter of cylinder body section in it, the internal diameter of the circle flange is corresponding with the outer diameter of two diaphragms and pressure ring；Flange
Inner wall offers pressure annular groove, and institute is fluted to be connected to pressure annular groove, and the inner end in pressure channel is connected to pressure annular groove, and pressure is logical
The outer end connection pressure gauge or pressure sensor in road.
In this way, the timeliness for guaranteeing pressure transmitting, being alarmed by pressure gauge or pressure sensor inspection, by uniformly distributed recessed
Slot and pressure annular groove, diaphragm no matter which position destroy, can and alarm；It should be noted that when assembly, two pressures
Groove in ring plate does not need to be oppositely arranged to combine composition pressure port, and any groove part can independently constitute a pressure port,
It is preferred that groove uniformly distributed in two pressure ring plates is arranged alternately in the circumferential.
Further, the stepped locations formed on the side of pressure ring by projection annular convex platform are arc transition, cylinder body
End face and installation plunger stage bottom surface on the stepped locations that are formed because annular groove is arranged also be corresponding arc transition.
In this way, the predeformation of diaphragm is more natural, is not in breakage during flexure, ensures service life.
Further, the seamed edge on the interior edge of two sides makees round corner treatment on pressure ring.
In this way, diaphragm will not be punctured in deflection deformation by the wedge angle on pressure ring, the damaged probability of diaphragm can be reduced.
Compared with prior art, the utility model has the following beneficial effects:
1, the utility model clamps the edge and pressure ring of two diaphragms by cylinder body and cylinder cap, while being provided with annular convex platform
The edge for clamping diaphragm by inner support, external pressure with corresponding annular groove, so that diaphragm is clamped position certain pre- change
Shape improves clamping effect by the predeformation of diaphragm, be less prone to during diaphragm deflection diaphragm edge to center sliding,
The phenomenon that continuing creep abjection, effectively improves the service life of diaphragm.
2, when diaphragm occurs damaged, pressure change can be transmitted the utility model by pressure port and pressure channel, by taking
The pressure gauge or pressure sensor of pressure passageway outer end connection show, alarm, and sealing ring is equipped between flange inner wall and outer wall of cylinder block,
Even if diaphragm is damaged, the sealed connection of diaphragm failure, hydraulic oil or medium will not leak from this, when strengthening diaphragm breakage
Sealing reliability.
3, the pressure channel of the utility model, pressure port and seal form structure are simple, and difficulty of processing is low, reduce manufacture at
This.
4, when the utility model passes through design according to use the factors such as temperature, pressure and membrane thicknesses determine diaphragm installation when
Diaphragm pre compressed magnitude.When assembly, cylinder block and head is connected by bolt mode and makes two corresponding end surfaces of cylinder body and cylinder cap straight
Contact, thus will not because diaphragm caused under alternate load effect continue creep due to generate diaphragm abjection failure or repeatedly by
It squeezes thinning and loses sealing effect, and then effectively extend diaphragm service life.
Detailed description of the invention
A kind of structural schematic diagram of diaphragm pump diaphragm alarm sealing structure of Fig. 1-specific embodiment；
Fig. 2-Fig. 1'sIPortion's enlarged drawing (2:1)；
Wherein, cylinder body 1, positive stop lug boss 11, gap 2, pressure ring 3, chamfering 31, arc transition 32, pressure port 33, rounded corner
34, annular convex platform 35, pressure ring plate 36, diaphragm 4, cylinder cap 5, pressure annular groove 51, pressure channel 52, flange 53, installation plunger stage 54,
Sealing ring 6, annular groove 7.
Specific embodiment
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.
Referring to Fig. 1, Fig. 2, a kind of diaphragm pump diaphragm of specific embodiment is alarmed sealing structure, including be set side by side two every
Film 4, is folded with pressure ring 3 between two diaphragms 4, the edge and pressure ring 3 of two diaphragms 4 simultaneously clamped in cylinder body 1 and cylinder cap 5 it
Between, perforative pressure port 33 is radially offered on pressure ring 3；The seamed edge on the interior edge of two sides makees rounded corner on pressure ring 3
34 processing.The cylinder cap 5 encloses flange 53 equipped with one towards protrusion on the end face of cylinder body 1 and sinks to be formed to install relatively in the end face
Platform 54, the corresponding end of cylinder body 1 protrude into the installation plunger stage 54 and the edge of two diaphragm 4 and pressure ring 3 are clamped in its end
Between face and the bottom surface of installation plunger stage 54；The internal diameter of the one circle flange 53 is corresponding with 1 section of cylinder body of outer diameter in it, and described one
The internal diameter for enclosing flange 53 is corresponding with the outer diameter of two diaphragms 4 and pressure ring 3；The outer fringe position of the two sides of pressure ring 3 is raised respectively
Equipped with a circle annular convex platform 35, the annular convex platform with respective side is respectively equipped on the end face of cylinder body 1 and the bottom surface of installation plunger stage 54
35 corresponding annular grooves 7；The stepped locations formed on the side of pressure ring 3 by projection annular convex platform 35 are arc transition
32, the stepped locations formed on the end face of cylinder body 1 and the bottom surface of installation plunger stage 54 because annular groove 7 are arranged are also corresponding circle
Arc transition radially offers perforative pressure channel 52, the inner end in the pressure channel 52 and pressure port on the flange 53
33 connections, outer end connect pressure gauge (not shown)；It is set between the inner wall of the flange 53 and 1 section of cylinder body of outer wall in it
There is sealing ring 6.
The diaphragm alarm sealing structure of specific embodiment, passes through cylinder body 1 and cylinder cap 5 clamps edge and the pressure of two diaphragms 4
Ring 3, while it being provided with the edge that annular convex platform 35 and corresponding annular groove 7 clamp diaphragm 4 by inner support, external pressure, make
Diaphragm 4, which is clamped position, certain predeformation, different from the plane method of clamping in existing structure, passes through the pre- change of diaphragm 4
Shape improves clamping effect, even if 4 retaining part pretightning force of diaphragm declines, due to the effect of 4 predeformation of diaphragm, scratches in diaphragm 4
Just it is not easy the phenomenon that 4 edge of diaphragm is deviate to center sliding, lasting creep occur during bent, therefore diaphragm 4 is deflecting across
Be not in creeping phenomenon in journey, the service life of diaphragm 4 can be effectively improved；If breakage occurs in diaphragm 4, pressure change can lead to
It crosses pressure port 33 and pressure channel 52 is transmitted, shown, alarmed by the pressure gauge that 52 outer end of pressure channel connects, wherein by convex
The setting of edge 53 opens up pressure channel 52 radially, can a direct drilling be process, reduce difficulty of processing, it is convex
Sealing ring 6 is equipped between 1 outer wall of 53 inner wall of edge and cylinder body, even if diaphragm 4 is damaged, the sealed connection of diaphragm 4 failure, hydraulic oil or
Medium will not leak from this, strengthen sealing reliability when 4 breakage of diaphragm.
Wherein, protrusion is equipped with positive stop lug boss 11, the positive stop lug boss 11 and the flange 53 on the outer wall of the cylinder body 1
End face has the gap 2 for controlling 4 pre compressed magnitude of diaphragm relatively and between positive stop lug boss 11 and flange 53.In this way, can be into
One step guarantees pretightning force；When design, according to use the factors such as temperature, pressure and membrane thicknesses determine diaphragm 4 install when every
Film pre compressed magnitude --- i.e. for controlling the gap 2 of diaphragm pre compressed magnitude, when assembly, cylinder cap 5 and cylinder body 1 are by bolt (in figure
It is not shown) mode of bolt connects, and guarantees by design requirement the pretightning force clamped to the edge and pressure ring 3 of two diaphragms 4, tool
Body is that the edge of two diaphragms 4 and pressure ring 3 are tentatively first clamped state as shown in Figure 1, is then further fastened by bolt again,
This is eliminated for controlling the gap 2 of diaphragm pre compressed magnitude, it is close that clamping is improved by control 4 predeformation amount of diaphragm and compression limit
Effect is sealed, and makes the direct rigid contact of both ends of the surface of positive stop lug boss 11 Yu flange 53, in this way, pre compressed magnitude of the diaphragm 4 by design
It is compacted, further accurately ensure that pretightning force, and cylinder body 1 with cylinder cap 5 is rigidly abutted by corresponding boss, use process
In would not because diaphragm 4 be caused under alternate load effect continue creep due to make diaphragm 4 abjection failure or repeatedly be extruded it is thinning
And sealing effect is lost, and then effectively extend 4 service life of diaphragm.It should be noted that opposite, existing similar structures
In, although being all to be clamped diaphragm 4 by cylinder body 1 and cylinder cap 5, abutted between cylinder body 1 and cylinder cap 5 without rigidity, it is nonmetallic
The decrement of class diaphragm fail to be effectively controlled by design and between the cylinder body 1 and cylinder cap 5 of final connection status there is also
Gap will result in diaphragm in use process by alternate load effect, continue creep and deviate from or be extruded thinning and lose repeatedly
Sealing effect.And positive stop lug boss 11 that the utility model is deliberately added, flange 53, gap 2 and it is corresponding use connection type,
It can avoid the above problem.
Wherein, the pressure ring 3 is made of two pressure ring plates 36 of radially double of subdivision, in two pressure ring plates, 36 phase
Pair face on open up respectively fluted and be formed as the pressure port 33, the processing of chamfering 31 is made in the outer end of groove.It is taken in this way, reducing
The difficulty of processing in hole 33 is pressed, and guarantees the validity of pressure port 33；The thickness of pressure ring 3 itself is relatively thin, and radial drilling processing takes
It presses 33 difficulty of hole larger, is easy to bore partially and cause to scrap, by the opposite form of two pressure ring plates 36, in 36 phase of pressure ring plate
Pair face on Milling Process or carve groove, processed instead of the drilling of the pressure port 33 of integral type pressure ring 3, reduce difficult processing
Degree, meanwhile, groove is located on the opposite face of two pressure ring plates 36, rather than towards diaphragm 4, diaphragm 4 becomes when not will cause clamping
The problem of shape ties up recess space and pressure port 33 is caused to fail, it is ensured that groove it is unobstructed to ensureing validity.
Further perfect, groove in pressure ring plate 36 is circumferentially uniformly distributed several of equal part；The inner wall of flange 53 is opened
Equipped with pressure annular groove 51, institute is fluted to be connected to pressure annular groove 51, and the inner end in pressure channel 52 is connected to pressure annular groove 51.This
Sample, guarantees pressure transmitting, and the timeliness alarmed by pressure table look-up passes through uniformly distributed groove and pressure annular groove 51,4 nothing of diaphragm
By which position destroy, can and alarm；It should be noted that the groove in two pressure ring plates 36 is not required to when assembly
It is oppositely arranged to combine and constitute pressure port 33, any groove part can independently constitute a pressure port 33, preferably two pressure rings
Uniformly distributed groove is arranged alternately in the circumferential on piece 36.
When implementation, the pressure ring plate 36 is made of metal material, and the diaphragm 4 is tetrafluoro diaphragm；When implementation, in order to
Assembly easy to process, cylinder cap 5 and cylinder body 1 can also further decompose processing, and in the present embodiment, cylinder body 1 is practical to be also split as
Cylinder body and restriction plate processing, cylinder body by restriction plate protrude into installation plunger stage 54 and by the edges and pressure ring 3 of two diaphragm 4
It clamping, positive stop lug boss 11 is also disposed on the outer wall of restriction plate, this has no effect on the implementation of the utility model, meanwhile, similar letter
Single fractionation replacement, should also fall into the protection scope of the utility model.
Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the scope of the claims of the utility model.
Claims (6)
- The sealing structure 1. a kind of diaphragm pump diaphragm is alarmed, including two diaphragms (4) being set side by side, two diaphragms are folded between (4) Pressure ring (3), the edge and pressure ring (3) of two diaphragms (4) are clamped between cylinder body (1) and cylinder cap (5), on pressure ring (3) Radially offer perforative pressure port (33)；It is characterized by: the cylinder cap (5) is equipped with one towards the end face of cylinder body (1) Flange (53) are enclosed to form installation plunger stage (54) in the end face, the corresponding end of cylinder body (1) protrudes into the installation plunger stage (54) and will The edge and pressure ring (3) of two diaphragm (4) are clamped between its end face and the bottom surface of installation plunger stage (54)；Pressure ring (3) The outer fringe positions of two sides protrusion is equipped with circle annular convex platform (35) respectively, the end face of cylinder body (1) and installation plunger stage (54) Annular groove (7) corresponding with annular convex platform (35) is respectively equipped on bottom surface；It radially offers and runs through on the flange (53) Pressure channel (52), the pressure channel (52) is connected to pressure port (33)；The inner wall of the flange (53) and cylinder body (1) Sealing ring (6) are equipped between outer wall.
- 2. a kind of diaphragm pump diaphragm alarm sealing structure according to claim 1, it is characterised in that: outside the cylinder body (1) Protrusion is equipped with positive stop lug boss (11) on wall, and the positive stop lug boss (11) is opposite with the end face of the flange (53) and positive stop lug boss (11) there is the gap (2) for controlling diaphragm (4) pre compressed magnitude between flange (53).
- 3. a kind of diaphragm pump diaphragm is alarmed sealing structure according to claim 1, it is characterised in that: the pressure ring (3) by Radially two pressure ring plates (36) of double of subdivision are constituted, and are opened up respectively on the opposite face of two pressure ring plates (36) fluted And be formed as the pressure port (33).
- 4. a kind of diaphragm pump diaphragm alarm sealing structure according to claim 3, it is characterised in that: in pressure ring plate (36) Groove is circumferentially uniformly distributed several of equal part；The internal diameter of the flange (53) is corresponding with 1 section of cylinder body of outer diameter in it, described The internal diameter of flange (53) is corresponding with the outer diameter of two diaphragms (4) and pressure ring (3)；The inner wall of flange (53) offers pressure annular groove (51), institute is fluted is connected to pressure annular groove (51), and pressure channel (52) are connected to pressure annular groove (51).
- 5. a kind of diaphragm pump diaphragm alarm sealing structure according to claim 1, it is characterised in that: the side of pressure ring (3) On the stepped locations that are formed by projection annular convex platform (35) be arc transition (32), the end face of cylinder body (1) and installation plunger stage (54) stepped locations formed on bottom surface because annular groove (7) are arranged are also corresponding arc transition.
- 6. a kind of diaphragm pump diaphragm alarm sealing structure according to claim 1, it is characterised in that: two sides on pressure ring (3) The seamed edge on the interior edge in face makees rounded corner (34) processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920154798.3U CN209414129U (en) | 2019-01-29 | 2019-01-29 | A kind of diaphragm pump diaphragm alarm sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920154798.3U CN209414129U (en) | 2019-01-29 | 2019-01-29 | A kind of diaphragm pump diaphragm alarm sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209414129U true CN209414129U (en) | 2019-09-20 |
Family
ID=67944389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920154798.3U Withdrawn - After Issue CN209414129U (en) | 2019-01-29 | 2019-01-29 | A kind of diaphragm pump diaphragm alarm sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209414129U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611324A (en) * | 2019-01-29 | 2019-04-12 | 重庆水泵厂有限责任公司 | Diaphragm pump diaphragm alarm sealing structure |
| CN114593041A (en) * | 2022-03-30 | 2022-06-07 | 重庆水泵厂有限责任公司 | Alarm detection pressure tapping structure for double-diaphragm pump |
-
2019
- 2019-01-29 CN CN201920154798.3U patent/CN209414129U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611324A (en) * | 2019-01-29 | 2019-04-12 | 重庆水泵厂有限责任公司 | Diaphragm pump diaphragm alarm sealing structure |
| CN109611324B (en) * | 2019-01-29 | 2023-06-02 | 重庆水泵厂有限责任公司 | Diaphragm alarm sealing structure of diaphragm pump |
| CN114593041A (en) * | 2022-03-30 | 2022-06-07 | 重庆水泵厂有限责任公司 | Alarm detection pressure tapping structure for double-diaphragm pump |
| CN114593041B (en) * | 2022-03-30 | 2024-08-09 | 重庆水泵厂有限责任公司 | Alarm detection pressure taking structure for double diaphragm pump |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190920 Effective date of abandoning: 20230602 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190920 Effective date of abandoning: 20230602 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |