CN114593041A - Alarm detection pressure tapping structure for double-diaphragm pump - Google Patents
Alarm detection pressure tapping structure for double-diaphragm pump Download PDFInfo
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- CN114593041A CN114593041A CN202210325891.2A CN202210325891A CN114593041A CN 114593041 A CN114593041 A CN 114593041A CN 202210325891 A CN202210325891 A CN 202210325891A CN 114593041 A CN114593041 A CN 114593041A
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- diaphragm
- ring
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- annular
- inner ring
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 238000010079 rubber tapping Methods 0.000 title claims description 26
- 238000005070 sampling Methods 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims description 8
- 239000003921 oil Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0081—Special features systems, control, safety measures
- F04B43/009—Special features systems, control, safety measures leakage control; pump systems with two flexible members; between the actuating element and the pumped fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/0046—Fluidic connecting means using isolation membranes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses an alarm detection pressure taking structure for a double-diaphragm pump, which comprises a cylinder body, a cylinder cover, a pressure taking ring and a double diaphragm, wherein the pressure taking ring is composed of an inner ring and an outer ring, two side faces of the inner ring are respectively provided with a ring groove, and the inner ring is provided with a plurality of axial sampling channels to communicate the ring grooves on the two sides. The cylinder body is provided with a pressure taking channel which is communicated with the annular groove on one side. The inner ring and the outer ring are attached to the joint, the inner wall of the diaphragm extends towards the diaphragm direction to form a thin-wall annular extending portion, the thin-wall annular extending portions of the inner ring and the outer ring are attached together to form an annular sampling portion, the annular sampling portion is clamped between the edges of the oil diaphragm and the material diaphragm in a sealing mode, a plurality of radial sampling channels are arranged on the annular sampling portion along the circumference, one end of each radial sampling channel is communicated with the cavity of the double diaphragms, and the other end of each radial sampling channel is communicated with the annular groove on the other side. The structure can effectively solve the problem that the diaphragm enters the pressure taking channel under high pressure to cause blockage, and improves the reliability of pressure taking and detection.
Description
Technical Field
The invention relates to an improved structure of a double-diaphragm pump, in particular to an alarm detection pressure-taking structure for the double-diaphragm pump, and belongs to the technical field of pump structures.
Background
The diaphragm pump is an important type of pump, and generally includes a power chamber and a fluid conveying chamber, which are separated by a diaphragm, wherein the power chamber applies pressure to the diaphragm by a reciprocating motion of a piston, and the diaphragm forms suction force and pushing force in the fluid conveying chamber during expansion and contraction, so that the conveyed fluid is continuously sucked from an inlet and then pressed out from an outlet, and the characteristics that the fluid in the power chamber is not contacted with the fluid in the conveying chamber are provided.
Among the diaphragm pumps, there is a double-diaphragm pump, which has a two-layer structure, is convenient for setting an alarm mechanism, can give an alarm when one layer of diaphragm breaks, can shut down and maintain in time, and avoids the diaphragm from breaking completely and causing larger influence. The double diaphragm pump has the function of warning in advance.
In traditional two diaphragm alarm mechanism, the pressure component that gets that is located the diaphragm centre is a circular thin hoop, and the part punches, uses on polytetrafluoroethylene material's two diaphragms respond well, but when being used for the two diaphragms of rubber, because of rubber diaphragm intensity is low, the smoothness at hoop edge influences diaphragm life-span greatly, has the fish tail to produce the breach gradually from this slightly, and the very short time will cause the diaphragm to break when serious.
Therefore, the Chinese utility model patent with the application number of 201120495317.9 and the invention name of 'a double diaphragm pump alarm detection pressure taking structure' discloses a pressure taking solution, which mainly comprises a double diaphragm, a pressure taking pipe and a diaphragm pump cylinder body with a pressure taking channel, wherein the upper end of the pressure taking pipe is provided with a positioning step. The surface of the diaphragm is provided with a groove for placing a pressure tapping pipe, the pressure tapping pipe is placed between the two diaphragms, and the pressure tapping pipe is aligned to a pressure tapping channel of the cylinder body during installation. When one diaphragm is broken, the hydraulic oil or the conveying medium entering the middle of the two diaphragms can generate pressure consistent with the working pressure, and the pressure is transmitted to external pressure monitoring equipment through a pressure taking channel of the cylinder body, so that diaphragm breakage alarm is realized. Because the pressure sampling pipe is only provided with one channel, if the opening is very small, the tiny rubber particles generated by the diaphragm can block during working, so that the alarm function fails; if the opening is large, for a pump with high pressure, rubber may be squeezed into the hole of the pressure tapping pipe, causing damage to the diaphragm and failure of the pressure tapping. And the cylinder body pressure taking channel is in direct contact with the diaphragm, so that the diaphragm can be extruded into the cylinder body pressure taking channel, and the blockage is difficult to clean due to the fact that the cylinder body channel is deep.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the alarm detection pressure-tapping structure for the double-diaphragm pump, which can effectively solve the problem that the diaphragm enters a pressure-tapping channel under high pressure to be blocked and improve the reliability of pressure tapping and detection.
The technical scheme of the invention is realized as follows:
the alarm detection pressure taking structure for the double-diaphragm pump comprises a cylinder body, a cylinder cover, a pressure taking ring and a double diaphragm consisting of an oil diaphragm and a material diaphragm, wherein the edges of the oil diaphragm and the material diaphragm are attached together, a cavity is formed in the middle of the oil diaphragm and the material diaphragm, and the periphery of the double diaphragm is fixedly arranged in the cylinder body and separates a power cavity and a fluid conveying cavity; get the clamping ring and be located two global periphery of diaphragm, its characterized in that: the pressure taking ring is composed of an inner ring and an outer ring which are attached side by side, a circle of annular grooves which are closed along the circumference of the side face are respectively arranged on the left side face and the right side face of the inner ring, a plurality of axial sampling channels are arranged in the inner ring along the thickness direction, and each axial sampling channel is communicated with the annular grooves on the two sides; a pressure taking channel is arranged on the cylinder body, one end of the pressure taking channel is communicated with the annular groove on one side, and the other end of the pressure taking channel is used for connecting pressure detection equipment; the inner ring and the outer ring are attached to the joint and face the inner wall face of the diaphragm to radially extend towards the diaphragm direction to form a thin-wall annular extending portion, the thin-wall annular extending portions of the inner ring and the outer ring are attached together to form an annular sampling portion surrounding the outer circumference of the double diaphragm, the annular sampling portion is clamped between the edges of the oil diaphragm and the material diaphragm in a sealing mode, a plurality of radial sampling channels are arranged on the annular sampling portion along the circumference, one end of each radial sampling channel is communicated with the cavity of the double diaphragm, and the other end of each radial sampling channel is communicated with the annular groove on the other side.
The side surface of the outer ring facing the inner ring is provided with an annular limiting step surface, and the outer diameter of the inner ring is matched with the size of the limiting step surface and is matched with the step surface of the outer ring.
Furthermore, a middle diaphragm is arranged between the oil diaphragm and the material diaphragm to form a sandwich diaphragm structure; the annular sampling part is clamped between the edges of the middle diaphragm and the material diaphragm in a closed manner.
The middle diaphragm is an F4 diaphragm or other flexible material diaphragm.
The outer ring is fixedly connected to the cylinder body through screws, and the inner ring is clamped between the outer ring and the cylinder body while the outer ring is fixedly connected with the cylinder body.
A sealing ring is arranged between the outer ring and the cylinder body.
The radial sampling channel is arranged between the binding surfaces of the thin-wall annular extension parts of the inner ring and the outer ring.
And a sealing ring is arranged between the cylinder cover and the cylinder body.
Compared with the prior art, the invention has the following beneficial effects:
the invention expands the original pressure tapping hole from one to a plurality of pressure tapping holes, and the other pressure tapping paths are not influenced even if one of the pressure tapping holes is blocked, thereby improving the reliability of pressure tapping. The ring-opening groove is formed in the pressure taking ring, so that the pressure taking ring is not easy to block and is convenient to install; the diaphragm is not contacted with the cylinder body pressure taking channel, so that the diaphragm is effectively prevented from being extruded into the cylinder body pressure taking channel under higher pressure, and the processing difficulty of the cylinder body pressure taking channel is also reduced. The invention can be used for all-rubber diaphragms, also can be used for diaphragms with iron cores and guide rods, and can form a sandwich diaphragm structure by adding a middle diaphragm between the two diaphragms.
The invention has low implementation cost and obvious effect; the application range is wide, and the pump is suitable for volume conveying and slurry conveying pumps.
Drawings
Fig. 1-a schematic diagram of the alarm detection pressure taking structure of the double diaphragm pump of the invention.
Fig. 2-a partial enlarged view of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the alarm detection pressure taking structure for the double-diaphragm pump comprises a cylinder body 1, a cylinder cover 2, a pressure taking ring and a double diaphragm composed of an oil diaphragm 3 and a material diaphragm 4, wherein the edges of the oil diaphragm 3 and the material diaphragm 4 are attached together, a cavity 5 is formed in the middle, and the periphery of the double diaphragm is fixedly arranged in the cylinder body and separates a power cavity and a fluid conveying cavity. The pressure taking ring is positioned on the periphery of the peripheral surface of the double diaphragm. The pressure taking ring is composed of an inner ring 6 and an outer ring 7 which are attached side by side, a circle of annular grooves 8 which are closed along the circumference of the side surfaces are respectively arranged on the left side surface and the right side surface of the inner ring 6, a plurality of axial sampling channels 9 are arranged in the inner ring 6 along the thickness direction, and each axial sampling channel 9 is communicated with the annular grooves 8 on the two sides; a pressure measuring channel 10 is arranged on the cylinder body 1, one end of the pressure measuring channel 10 is communicated with the annular groove 8 on one side, and the other end of the pressure measuring channel 10 is used for being connected with pressure detection equipment. The joint of the inner ring 6 and the outer ring 7 and the inner wall surface facing the diaphragm respectively extend radially to the diaphragm direction to form a thin-wall annular extension part 11, the thin-wall annular extension parts 11 of the inner ring and the outer ring are jointed together to form an annular sampling part 12 surrounding the outer circumference of the double diaphragm, the annular sampling part 12 is clamped between the edges of the oil diaphragm 3 and the material diaphragm 4 in a sealing way, a plurality of radial sampling channels 13 are arranged on the annular sampling part 12 along the circumference, one end of each radial sampling channel 13 is communicated with the cavity 5 of the double diaphragm, and the other end of each radial sampling channel 13 is communicated with the ring groove 8 on the other side.
The cavity 5 of the invention is connected with pressure detection equipment through a radial sampling channel 13 on an annular sampling part 12, a ring groove 8 on one side of an inner ring 6, an axial sampling channel 9 on the inner ring 6, a ring groove 8 on the other side of the inner ring and a pressure taking channel 10 on a cylinder body 1 in sequence, on the whole connecting path, the radial sampling channel 13 and the axial sampling channel 9 are both provided with a plurality of ring grooves 8, and meanwhile, the two sides of the inner ring 6 are both provided with the ring grooves 8, even if one of the channels is blocked or one of the ring grooves is blocked, the whole connectivity is not influenced, thereby improving the reliability of pressure taking.
The side surface of the outer ring facing the inner ring is provided with an annular limiting step surface, the outer diameter of the inner ring is matched with the size of the limiting step surface and is in butt fit with the step surface of the outer ring (the inner diameter and the thickness of the inner ring are matched with the width and the thickness of the step surface). The arrangement of the limiting step surface not only facilitates the positioning of the inner ring, but also simplifies the integral structure of the pressure tapping ring formed by the inner ring and the outer ring as much as possible.
A middle diaphragm 14 is arranged between the oil diaphragm 3 and the material diaphragm 4 to form a sandwich diaphragm structure; the annular sampling part 12 is clamped between the middle diaphragm 14 and the edge of the material diaphragm 4 in a closed manner. The intermediate diaphragm 14 is an F4 diaphragm or other flexible material diaphragm. By arranging the middle diaphragm, the cavity position needing to be separated between the oil diaphragm and the material diaphragm (usually made of rubber materials) can be reliably separated, and the pressure tapping alarm function is prevented from being influenced by the joint of the oil diaphragm and the material diaphragm.
The outer ring 7 is fixedly connected to the cylinder 1 by means of screws 15 and clamps the inner ring 6 between the outer ring 7 and the cylinder 1 while being fixedly connected. Under the cooperation of the limiting step surface, the outer ring is fixed in place, and the inner ring is also fixed in place at the same time, so that the connection relation is simplified.
An O-shaped sealing ring 16 is arranged between the outer ring 7 and the cylinder body 1.
Preferably, the radial sampling channel is arranged between abutting surfaces of the thin-walled annular extensions of the inner ring and the outer ring. Therefore, only the radial groove is required to be arranged on the thin-wall annular extension part of the inner ring or/and the outer ring, and the radial sampling channel is naturally formed after the inner ring and the outer ring are attached, so that the processing is convenient.
A rectangular sealing ring 17 is arranged between the cylinder cover 2 and the cylinder body 1. On the basis that the O-shaped sealing ring 16 is arranged between the outer ring and the cylinder body, a double-sealing structure is formed, and the sealing effect can be further ensured.
The outer ring is provided with a step surface, the inner ring is provided with axial sampling channels, all the axial sampling channels are communicated through the ring groove, and the size of the inner ring is matched with the step surface of the outer ring, so that a complete pressure-taking ring can be formed in a combined manner. When the pump works, the middle of the two diaphragms is in a state close to vacuum, after any one diaphragm is broken, hydraulic oil or a conveying medium enters the middle part of the two diaphragms and generates pressure consistent with working pressure, and the pressure is transmitted to a pressure monitoring instrument on the cylinder body through a channel on the pressure taking ring and a pressure taking channel on the cylinder body, so that diaphragm breakage alarm is realized. Because the probability that two diaphragms break simultaneously is very low, can realize reporting to the police when a diaphragm breaks, can make the maintenance arrangement to the pump in advance, avoid causing further influence. According to the working condition of the medium, the size and the number of the axial sampling channels can be flexibly set, particularly, the pressure tapping channel can be prevented from being blocked, and the problems of processing manufacturability and use reliability are well considered. The pressure measuring channel is convenient to clean. It can be seen that the present improvement is novel in concept, low in implementation cost, and has significant practicality and advancement.
Finally, it should be noted that the above-mentioned examples of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. It is not exhaustive here for all embodiments. All obvious changes and modifications of the present invention are within the scope of the present invention.
Claims (8)
1. An alarm detection pressure-taking structure for a double-diaphragm pump comprises a cylinder body, a cylinder cover, a pressure-taking ring and a double diaphragm composed of an oil diaphragm and a material diaphragm, wherein the edges of the oil diaphragm and the material diaphragm are attached together, a cavity is formed in the middle of the oil diaphragm and the material diaphragm, and the periphery of the double diaphragm is fixedly arranged in the cylinder body and separates a power cavity from a fluid conveying cavity; get the clamping ring and be located two global periphery of diaphragm, its characterized in that: the pressure taking ring is composed of an inner ring and an outer ring which are attached side by side, a circle of annular grooves which are closed along the circumference of the side face are respectively arranged on the left side face and the right side face of the inner ring, a plurality of axial sampling channels are arranged in the inner ring along the thickness direction, and each axial sampling channel is communicated with the annular grooves on the two sides; a pressure taking channel is arranged on the cylinder body, one end of the pressure taking channel is communicated with the annular groove on one side, and the other end of the pressure taking channel is used for connecting pressure detection equipment; the inner ring and the outer ring are attached to the joint and face the inner wall face of the diaphragm to radially extend towards the diaphragm direction to form a thin-wall annular extending portion, the thin-wall annular extending portions of the inner ring and the outer ring are attached together to form an annular sampling portion surrounding the outer circumference of the double diaphragm, the annular sampling portion is clamped between the edges of the oil diaphragm and the material diaphragm in a sealing mode, a plurality of radial sampling channels are arranged on the annular sampling portion along the circumference, one end of each radial sampling channel is communicated with the cavity of the double diaphragm, and the other end of each radial sampling channel is communicated with the annular groove on the other side.
2. The alarm detection pressure tapping structure for the double-diaphragm pump according to claim 1, wherein the side surface of the outer ring facing the inner ring is provided with an annular limit step surface, and the outer diameter of the inner ring is matched with the size of the limit step surface and is matched with the step surface of the outer ring.
3. The alarm detection pressure tapping structure for the double-diaphragm pump according to claim 1, wherein a middle diaphragm is arranged between the oil diaphragm and the material diaphragm to form a sandwich diaphragm structure; the annular sampling part is clamped between the edges of the middle diaphragm and the material diaphragm in a closed manner.
4. The alarm detection pressure tapping structure for the double-diaphragm pump according to claim 3, wherein the intermediate diaphragm is an F4 diaphragm or other flexible material diaphragm.
5. The alarm detection pressure tapping structure for the double diaphragm pump according to claim 1, wherein the outer ring is fixedly connected to the cylinder body through a screw and clamps the inner ring between the outer ring and the cylinder body while being fixedly connected.
6. The alarm detection pressure tapping structure for the double-diaphragm pump according to claim 1, wherein a sealing ring is arranged between the outer ring and the cylinder body.
7. The alarm detection pressure tapping structure for the double-diaphragm pump according to claim 1, wherein the radial sampling channel is provided between the abutting surfaces of the thin-walled annular extensions of the inner ring and the outer ring.
8. The alarm detection pressure tapping structure for the double-diaphragm pump according to claim 1, wherein a sealing ring is arranged between the cylinder cover and the cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210325891.2A CN114593041A (en) | 2022-03-30 | 2022-03-30 | Alarm detection pressure tapping structure for double-diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210325891.2A CN114593041A (en) | 2022-03-30 | 2022-03-30 | Alarm detection pressure tapping structure for double-diaphragm pump |
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| Publication Number | Publication Date |
|---|---|
| CN114593041A true CN114593041A (en) | 2022-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210325891.2A Pending CN114593041A (en) | 2022-03-30 | 2022-03-30 | Alarm detection pressure tapping structure for double-diaphragm pump |
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| Country | Link |
|---|---|
| CN (1) | CN114593041A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1501640A (en) * | 1975-12-24 | 1978-02-22 | Simpson Cw | Diaphragm pumps |
| CN209414129U (en) * | 2019-01-29 | 2019-09-20 | 重庆水泵厂有限责任公司 | A kind of diaphragm pump diaphragm alarm sealing structure |
| CN211397838U (en) * | 2019-10-14 | 2020-09-01 | 杭州盛维科技有限公司 | Diaphragm pump |
-
2022
- 2022-03-30 CN CN202210325891.2A patent/CN114593041A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1501640A (en) * | 1975-12-24 | 1978-02-22 | Simpson Cw | Diaphragm pumps |
| CN209414129U (en) * | 2019-01-29 | 2019-09-20 | 重庆水泵厂有限责任公司 | A kind of diaphragm pump diaphragm alarm sealing structure |
| CN211397838U (en) * | 2019-10-14 | 2020-09-01 | 杭州盛维科技有限公司 | Diaphragm pump |
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