CN219200708U - Corrugated tubular diaphragm of pipeline type diaphragm pressure instrument - Google Patents
Corrugated tubular diaphragm of pipeline type diaphragm pressure instrument Download PDFInfo
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- CN219200708U CN219200708U CN202320222940.XU CN202320222940U CN219200708U CN 219200708 U CN219200708 U CN 219200708U CN 202320222940 U CN202320222940 U CN 202320222940U CN 219200708 U CN219200708 U CN 219200708U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a corrugated tubular diaphragm of a pipeline diaphragm pressure instrument, which comprises a tubular diaphragm, wherein convex-concave corrugations are formed on the outer surface of the tubular diaphragm along the axial direction of the tubular diaphragm, and convex parts and concave parts of the corrugations are all surrounded along the circumferential direction of the tubular diaphragm; the cylindrical diaphragm is integrally extruded and formed through a plate. In the utility model, the tubular diaphragm is integrally formed, so that the tubular diaphragm is not easy to crack. Moreover, the convex-concave corrugation is formed on the surface of the cylindrical membrane, so that the structural strength of the cylindrical membrane is further improved. Thus, the cylindrical membrane can be effectively prevented from cracking. In addition, the convex-concave corrugation changes the radial dimension of the cylindrical diaphragm, and after the medium acts on the cylindrical diaphragm to deform the cylindrical diaphragm, the convex-concave corrugation can obviously squeeze the pressure oil liquid, so that the pressure instrument senses obvious pressure, the precision of the pressure instrument is improved, and the requirement of the pipeline diaphragm pressure instrument for precise measurement is met.
Description
Technical Field
The utility model relates to the field of pressure instruments, in particular to a corrugated cylindrical diaphragm of a pipeline type diaphragm pressure instrument.
Background
The conventional pipeline diaphragm pressure gauge has a structure as shown in fig. 1, and the diaphragm is a cylindrical diaphragm 400, and the surface of the diaphragm is smooth and flat. An oil passage 300 is provided in the pipe 200 of the pipe type diaphragm pressure gauge. The pipeline 200 also has an annular cavity, the cylindrical diaphragm 400 is arranged in the annular cavity, the cylindrical diaphragm 400 and the cavity wall of the annular cavity enclose an oil cavity 600, and the oil cavity 600 is communicated with the oil channel 300. The oil passage 300 and the oil chamber 600 are filled with pressure-transmitting oil. The interior of the cylindrical membrane 400 is used for medium circulation. When the medium flows into the inner cavity of the tubular diaphragm 400, the pressure of the medium is sequentially transmitted to the pressure instrument through the tubular diaphragm 400 and the pressure transmission oil liquid, and the pressure instrument displays a pressure value after sensing the pressure.
In the prior art, the cylindrical film 400 is formed by winding a band-shaped film. The strip-shaped film is rolled into a tube shape, and then the two side edges are welded with each other. Because the diaphragm is thin and it is required to withstand the pressure of the medium during operation, the cylindrical diaphragm 400 is prone to cracking, particularly at the weld, resulting in leakage of the medium or ingress of the medium into the pressure gauge. The transmission of the medium pressure is achieved by pressing the pressure-transmitting oil by the deformation of the cylindrical diaphragm 400. For the cylindrical diaphragm 400 with smooth and flat surface, the extrusion of the pressure oil is not obvious after the deformation, so that the precision of the pressure instrument is poor, and the requirement for the precise measurement of the pipeline diaphragm pressure instrument cannot be met.
Therefore, how to prevent the cylindrical diaphragm from cracking and how to improve the accuracy of the pressure gauge is a critical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The utility model aims to prevent cracking of a cylindrical diaphragm and improve the accuracy of a pressure instrument. In order to achieve the above purpose, the present utility model provides the following technical solutions:
the corrugated tubular diaphragm of the pipeline diaphragm pressure instrument comprises a tubular diaphragm, wherein convex and concave corrugations are formed on the outer surface of the tubular diaphragm along the axial direction of the tubular diaphragm, and the convex parts and the concave parts of the corrugations are all circumferentially surrounded along the tubular diaphragm; the cylindrical diaphragm is integrally formed by plate extrusion.
Preferably, the concave portion is recessed inward with respect to the cylindrical diaphragm, and the convex portion is formed between two adjacent concave portions.
Preferably, the cross section of the concave portion is arc-shaped or saw-tooth-shaped.
Preferably, the convex portion protrudes outward with respect to the cylindrical diaphragm, and the concave portion is formed between two adjacent convex portions.
Preferably, the cross section of the convex portion is arc-shaped or saw-tooth-shaped.
Preferably, an annular groove encircling along the circumferential direction of the forming die is arranged on the surface of the forming die; the forming die and the cylindrical diaphragm can be mutually sleeved, and the cylindrical diaphragm forms the convex part or the concave part in the annular groove under the action of external pressure.
Preferably, the forming die is a core, the outer surface of the core is provided with the annular groove, and the core can be inserted into the cylindrical membrane.
Preferably, the core includes a core shaft portion and a plurality of sectors disposed around the core shaft portion.
Preferably, the forming die is a pipeline of a pipeline type diaphragm pressure instrument, the pipeline is provided with an annular cavity, the annular cavity is matched with the cylindrical diaphragm, and the cavity wall of the annular cavity is provided with the annular groove.
From the technical scheme, the following can be seen: in the utility model, the tubular diaphragm is integrally formed, and a welding line in the prior art does not exist, so that the tubular diaphragm is not easy to crack. Moreover, the convex-concave corrugation is formed on the surface of the cylindrical membrane, so that the structural strength of the cylindrical membrane is further improved. Therefore, the cylindrical diaphragm can be effectively prevented from cracking, and medium leakage is avoided.
In the prior art, the surface of the cylindrical diaphragm is smooth and flat, convex-concave waves are arranged on the surface of the cylindrical diaphragm, so that the size of the cylindrical diaphragm in the radial direction is changed by the convex-concave waves, and after a medium acts on the cylindrical diaphragm to deform the cylindrical diaphragm, the convex-concave waves can obviously squeeze the pressure oil liquid, so that the pressure instrument senses obvious pressure, the precision of the pressure instrument is improved, and the requirement of the pipeline type diaphragm pressure instrument for precise measurement is met.
Drawings
In order to more clearly illustrate the solution of the embodiments of the present utility model, the following description will briefly explain the drawings needed to be used in the embodiments, it being evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pipeline diaphragm pressure gauge according to an embodiment of the prior art;
FIG. 2 is a schematic structural diagram of a cylindrical membrane according to an embodiment of the present utility model;
FIG. 3 is a cross-sectional view of a cylindrical diaphragm according to an embodiment of the present utility model;
FIG. 4 is a cross-sectional view of a core provided in an embodiment of the present utility model;
FIG. 5 is a side view of a core provided in an embodiment of the present utility model;
FIG. 6 is a schematic view of a corrugated structure formed by a core according to an embodiment of the present utility model;
FIG. 7 is a schematic view of a corrugated structure formed by a pipe according to an embodiment of the present utility model;
fig. 8 is a schematic flow chart of forming corrugations by using a core according to an embodiment of the present utility model.
100 is a pressure instrument, 200 is a pipeline, 300 is an oil channel, 400 is a cylindrical diaphragm, 500 is a welding point between the cylindrical diaphragm and the pipeline, and 600 is an oil cavity;
the device comprises a cylindrical diaphragm 1, a corrugated diaphragm 2, a concave part 21, a convex part 22, a convex part 23, a concave part 24, a core body 3, a core shaft part 31, a fan-shaped part 32, an annular groove 4, an oil cavity 5, a welding point of a cylindrical film and a pipeline 6, an oil liquid channel 7, a pressure supply port 8, a sealing clamping plate 9 and a pressure nozzle 10.
Detailed Description
The utility model discloses a corrugated tubular diaphragm of a pipeline type diaphragm pressure instrument, which can prevent cracking and improve the precision of the pressure instrument.
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
The utility model discloses a corrugated tubular diaphragm of a pipeline diaphragm pressure instrument, which comprises a tubular diaphragm 1, wherein the tubular diaphragm 1 is formed in the following way: the barreled membrane is integrally extruded by a metal plate, and then the barrel bottom of the barreled membrane is cut off to form a barrel-shaped membrane 1, as shown in figure 2. In the present utility model, the outer surface of the cylindrical membrane 1 is provided with the convex-concave corrugation 2, the convex-concave corrugation 2 extends along the axial direction of the cylindrical membrane 1, and the convex part and the concave part of the corrugation 2 are both annular arranged around the circumferential direction of the cylindrical membrane 1, as shown in fig. 3.
In the utility model, the tubular diaphragm 1 is integrally molded, and a weld joint in the prior art does not exist, so that the tubular diaphragm is not easy to crack. Further, since the convex-concave corrugations 2 are formed on the surface of the cylindrical membrane 1, the structural strength of the cylindrical membrane 1 is further improved. Thus, the tubular diaphragm 1 can be effectively prevented from being broken, and leakage of the medium can be avoided.
In the prior art, the surface of the cylindrical diaphragm is smooth and flat, the convex-concave corrugation 2 is arranged on the surface of the cylindrical diaphragm 1, the convex-concave corrugation 2 changes the dimension of the cylindrical diaphragm 1 in the radial direction, and after a medium acts on the cylindrical diaphragm 1 to deform the cylindrical diaphragm 1, the convex-concave corrugation 2 can obviously squeeze pressure oil liquid, so that the pressure gauge senses obvious pressure, the precision of the pressure gauge is improved, and the requirement of the pipeline type diaphragm pressure gauge for precise measurement is met.
In a specific embodiment of the present utility model, the concave portions of the corrugations 2 are recessed into the interior of the cylindrical membrane 1 on the basis of the cylindrical membrane 1. The convex portions and concave portions of the corrugations 2 are alternately arranged along the axial direction of the cylindrical membrane 1, so that the convex portions of the corrugations 2 are naturally formed between the adjacent two concave portions. Further, the cross section of the concave portion may be circular arc-shaped or zigzag-shaped.
In a specific embodiment of the present utility model, the convex portions of the corrugations 2 protrude outside the cylindrical membrane 1 on the basis of the cylindrical membrane 1. The convex portions and concave portions of the corrugations 2 are alternately arranged along the axial direction of the cylindrical membrane 1, so that the concave portions of the corrugations 2 are naturally formed between the adjacent two convex portions. Further, the cross section of the convex portion may be circular arc-shaped or zigzag-shaped.
The convex or concave portions of the molding corrugations 2 need to use a molding die. An annular groove 4 is provided on the surface of the molding die, and the annular groove 4 is circumferentially provided along the circumferential direction of the molding die. The annular grooves 4 may be one or a plurality of annular grooves arranged at intervals along the axial direction of the molding die. The forming die and the tubular diaphragm 1 can be mutually sleeved. The cylindrical membrane 1 forms the convex or concave part of the corrugation in the annular groove 4 under the action of external pressure.
If a forming die is inserted in the inner cavity of the cylindrical diaphragm 1, pressure is applied from the outside of the cylindrical diaphragm 1 to bring the cylindrical diaphragm 1 into close contact with the forming die while forming the concave portions 21 of the corrugations 2 in the annular groove 4 of the forming die. Between two adjacent concave portions 21, convex portions 22 of the ripple 2 are naturally formed.
If a forming die is fitted over the outside of the cylindrical diaphragm 1, pressure is applied from the inside of the cylindrical diaphragm 1 to bring the cylindrical diaphragm 1 into close contact with the forming die while forming the convex portions 23 of the corrugations 2 in the annular groove 4 of the forming die. Between two adjacent convex portions 23, concave portions 24 of the ripple 2 are naturally formed.
In the process of forming the convex portion or the concave portion on the cylindrical membrane 1, the internal structure of the cylindrical membrane 1 is changed, so that the structural strength of the cylindrical membrane 1 is improved.
Referring to fig. 4, 5 and 6, in an embodiment of the present utility model, the forming mold is specifically a core 3, and an annular groove 4 is disposed on an outer surface of the core 3, where the annular groove 4 may be one or multiple annular grooves arranged at intervals along an axial direction of the core 3. The core 3 can be inserted into the cylindrical membrane 1, and can be taken out from the cylindrical membrane 1 after the cylindrical membrane 1 is corrugated.
The core 3 specifically includes a core shaft 31 and a plurality of sectors 32 disposed around the core shaft 31, i.e., the core 3 is an assembled core 3. The purpose of this arrangement is to facilitate removal of the core 3 after the recess 21 has been formed in the cylindrical membrane 1. Specifically, when the core 3 is detached, the core shaft portion 31 is first extracted in the axial direction, and then the sector portion 32 is moved inward in the radial direction to separate the sector portion 32 from the cylindrical membrane 1, which can be regarded as demolding.
Referring to fig. 7, in an embodiment of the present utility model, the forming mold is a pipe of a pipe-type diaphragm pressure gauge. The pipeline is provided with an annular cavity which is matched with the cylindrical diaphragm 1, and an oil cavity 5 is formed between the cylindrical diaphragm 1 and the cavity wall of the annular cavity. An oil liquid channel 7 is also arranged in the pipeline, and the oil liquid cavity 5 is communicated with a pressure instrument through the oil liquid channel 7. The annular wall of the annular cavity is provided with an annular recess 4 for the shaped protrusion 23.
When the corrugated convex part 23 is formed, two ends of the cylindrical diaphragm 1 are welded on the cavity wall of the annular cavity of the pipeline, then the two ends of the pipeline are plugged through the sealing clamping plates 9, so that the inner cavity of the cylindrical diaphragm 1 forms a closed cavity, then pressure is introduced into the closed cavity, so that the cylindrical diaphragm 1 is tightly attached to the cavity wall of the annular cavity of the pipeline, and meanwhile, the cylindrical diaphragm 1 forms the convex part 23 in the annular groove 4. Between two adjacent convex portions 23, a corrugated concave portion 24 is naturally formed.
Next, a method for processing the corrugated cylindrical diaphragm 1 of the pipeline diaphragm pressure instrument will be specifically described, the method comprising:
s1: the forming die and the cylindrical diaphragm 1 are mutually sleeved, and the forming die and the cylindrical diaphragm 1 are placed in a sealing environment. The sealed environment may be created by means of an external device.
S2: pressure is applied to the side of the cylindrical membrane 1 facing away from the forming die to bring the cylindrical membrane 1 into close contact with the forming die, thereby forming the cylindrical membrane 1 into the convex or concave portions of the corrugations 2 in the annular groove 4 of the forming die.
S3: the pressure is released to separate the forming die from the cylindrical membrane 1, thereby forming the corrugated cylindrical membrane 1.
The cylindrical membrane 1 is formed by integrally extrusion molding a metal plate. In the specific embodiment of the utility model, the thickness of the cylindrical membrane 1 is designed to be 0.05mm-0.15mm, the diameter of the cylindrical membrane 1 is designed to be 20mm-100mm, and the length of the cylindrical membrane 1 is designed to be 50-150mm.
If the forming die is a core 3:
the step S1 specifically comprises the following steps: the method comprises the steps of placing a cylindrical diaphragm 1 into an annular cavity of a pipeline type diaphragm pressure instrument, welding two ends of the cylindrical diaphragm 1 on cavity walls at two ends of the annular cavity of the pipeline, and placing a core body 3 into an inner cavity of the cylindrical diaphragm 1. Please refer to a in fig. 6.
The step S2 specifically comprises the following steps: the high-pressure gas or high-pressure liquid is introduced into the oil liquid channel 7 and the oil liquid cavity 5 of the pipeline through the pressure feed port 8 of the pipeline, and the high-pressure gas or the high-pressure liquid can generate radial inward pressure on the cylindrical diaphragm 1, so that the cylindrical diaphragm 1 is tightly attached to the core body 3, the cylindrical diaphragm 1 forms concave parts 21 in the annular groove 4, and corrugated convex parts 22 are naturally formed between two adjacent concave parts 21. Please refer to b in fig. 6.
The step S3 specifically comprises the following steps: the pressure is relieved through the pressure supply port 8 of the pipeline, and the core body 3 is disassembled. When the core 3 is detached, the core shaft portion 31 is first extracted in the axial direction, and then the sectors 32 are moved inward in the radial direction to separate the sectors 32 from the cylindrical membrane 1, which can be regarded as demolding.
If the forming die is a pipeline of a pipeline diaphragm pressure gauge:
the step S1 specifically comprises the following steps: the tubular diaphragm 1 is placed in an annular cavity of a pipeline, two ends of the tubular diaphragm 1 are welded on the cavity wall of the annular cavity, please refer to a in fig. 7, and then the two ends of the annular cavity are sealed by a sealing clamping plate 9, so that the inner cavity of the tubular diaphragm 1 forms a closed cavity, and a pressure nozzle 10 is arranged on the sealing clamping plate 9. The pressure nozzle 10 can be opened to connect the pressure device and can also be plugged to ensure a sealed environment for the cylindrical diaphragm.
The step S2 specifically comprises the following steps: high-pressure liquid or high-pressure gas is introduced into the inner cavity of the tubular diaphragm 1 through the pressure nozzle 10, so that the tubular diaphragm 1 is closely attached to the cavity wall of the annular cavity, and the tubular diaphragm 1 forms corrugated convex parts 23 in the annular groove 4, and corrugated concave parts 24 are naturally formed between two adjacent convex parts 23. Please refer to b in fig. 7. After high-pressure liquid or high-pressure gas is introduced into the inner cavity of the cylindrical diaphragm 1, the high-pressure liquid or high-pressure gas can generate extrusion force to the cylindrical diaphragm 1 outwards along the radial direction, so that the cylindrical diaphragm 1 is forced to be closely attached to the cavity wall of the annular cavity.
The step S3 specifically comprises the following steps: the pressure nozzle 10 is opened to release pressure, the sealing clamping plate 9 is disassembled, and the cylindrical diaphragm 1 rebounds inwards in the radial direction so as to be separated from the cavity wall of the annular cavity. After the cylindrical diaphragm 1 rebounds inwards along the radial direction, an oil cavity 5 is formed between the cylindrical diaphragm 1 and the cavity wall of the annular cavity, and the oil cavity 5 is communicated with a pressure instrument through an oil channel 7.
Finally, it is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The corrugated cylindrical diaphragm of the pipeline type diaphragm pressure instrument is characterized by comprising a cylindrical diaphragm (1), wherein convex-concave corrugations (2) are formed on the outer surface of the cylindrical diaphragm (1) along the axial direction of the cylindrical diaphragm (1), and the convex parts and the concave parts of the corrugations (2) are all circumferentially surrounded along the circumferential direction of the cylindrical diaphragm (1); the cylindrical diaphragm (1) is integrally formed by plate extrusion.
2. A corrugated cylindrical diaphragm for a pipeline diaphragm pressure gauge according to claim 1, wherein the recess is recessed inwardly relative to the cylindrical diaphragm (1), and the protrusion is formed between two adjacent recesses.
3. The corrugated cylindrical diaphragm of a pipeline diaphragm pressure gauge according to claim 2, wherein the cross section of the concave portion is circular arc-shaped or saw tooth-shaped.
4. A corrugated cylindrical diaphragm for a pipeline diaphragm pressure gauge according to claim 1, wherein the protrusions protrude outwards relative to the cylindrical diaphragm (1), and the recesses are formed between two adjacent protrusions.
5. The corrugated cylindrical diaphragm of a pipeline diaphragm pressure gauge according to claim 4, wherein the cross section of the convex portion is arc-shaped or saw-tooth-shaped.
6. The corrugated cylindrical diaphragm of a pipe diaphragm pressure gauge according to claim 1, wherein an annular groove surrounding in a circumferential direction of the molding die is provided on a surface of the molding die; the forming die and the cylindrical diaphragm (1) can be mutually sleeved, and the cylindrical diaphragm (1) forms the convex part or the concave part in the annular groove under the action of external pressure.
7. The corrugated cylindrical diaphragm of a pipeline diaphragm pressure instrument according to claim 6, wherein the forming die is a core body (3), the annular groove is formed in the outer surface of the core body (3), and the core body (3) can be inserted into the cylindrical diaphragm (1).
8. A corrugated cylindrical diaphragm for a pipeline diaphragm pressure gauge according to claim 7, wherein the core (3) comprises a core portion (31) and a plurality of sectors (32) arranged around the core portion (31).
9. The corrugated cylindrical diaphragm of a pipeline diaphragm pressure instrument according to claim 6, characterized in that the forming die is a pipeline of the pipeline diaphragm pressure instrument, the pipeline is provided with an annular cavity, the annular cavity is matched with the cylindrical diaphragm (1), and the cavity wall of the annular cavity is provided with the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320222940.XU CN219200708U (en) | 2023-02-03 | 2023-02-03 | Corrugated tubular diaphragm of pipeline type diaphragm pressure instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320222940.XU CN219200708U (en) | 2023-02-03 | 2023-02-03 | Corrugated tubular diaphragm of pipeline type diaphragm pressure instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219200708U true CN219200708U (en) | 2023-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320222940.XU Active CN219200708U (en) | 2023-02-03 | 2023-02-03 | Corrugated tubular diaphragm of pipeline type diaphragm pressure instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219200708U (en) |
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- 2023-02-03 CN CN202320222940.XU patent/CN219200708U/en active Active
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