CN211373905U - Overpressure-preventing diaphragm capsule pressure gauge - Google Patents
Overpressure-preventing diaphragm capsule pressure gauge Download PDFInfo
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- CN211373905U CN211373905U CN201922253214.0U CN201922253214U CN211373905U CN 211373905 U CN211373905 U CN 211373905U CN 201922253214 U CN201922253214 U CN 201922253214U CN 211373905 U CN211373905 U CN 211373905U
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Abstract
The utility model relates to the technical field of pressure gauges, in particular to a pressure gauge for preventing an overpressure type diaphragm capsule, which comprises an overpressure protection mechanism, wherein the overpressure protection mechanism is arranged at the input end of a pressure gauge main body, the overpressure protection mechanism comprises an upper mounting block, an adapter, a first piston, a slide block and a first spring, one end of the upper mounting block is provided with a first flow passage, the other end of the upper mounting block is provided with a second flow passage, one end of the first flow passage is communicated with the second flow passage, the other end of the first flow passage is communicated with the adapter, the diameter of the second flow passage is smaller than that of the first flow passage, the second flow passage is communicated with the pressure gauge main body, the inner wall of one end of the first flow passage, which is close to the second flow passage, is provided with a slide groove, one end of the slide block is slidably arranged in the slide groove, when the air pressure of, the first piston seals the inlet of the second flow passage to prevent excessive pressure from entering the main body of the barometer and causing damage.
Description
Technical Field
The utility model relates to a manometer technical field especially relates to a prevent excessive pressure type diaphragm capsule manometer.
Background
Because the capsule pressure gauge is used for measuring tiny pressure, the instant high-pressure impact is easily caused by various reasons such as misoperation, misloading of pressure sources, pressure runaway and the like in the using process, and the pressure value exceeds five, six times or even two or thirty times of the upper measuring limit of the capsule pressure gauge. Bellows gauges, in use, can only be used to measure pressures within an upper limit. If there is an overpressure, only 30% of the upper measurement limit can be exceeded. Once the pressure exceeds 130% of the upper limit of measurement under the condition of instant high-pressure impact, the elastic element of the capsule pressure gauge, namely the capsule, can generate fatigue deformation and be damaged, so that the instrument can not work normally or the capsule is broken to leak the measurement medium, and the capsule pressure gauge is scrapped.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the shortcoming that the capsule pressure gauge is easily damaged by high-pressure impact in the prior art, and providing a prevent excessive pressure type capsule pressure gauge.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the overpressure protection mechanism is arranged at the input end of a pressure gauge main body and comprises an upper mounting block, an adapter, a first piston, a sliding block and a first spring, wherein one end of the upper mounting block is provided with a first flow channel, the other end of the upper mounting block is provided with a second flow channel, one end of the first flow channel is communicated with the second flow channel, the other end of the first flow channel is communicated with the adapter, the diameter of the second flow channel is smaller than that of the first flow channel, the second flow channel is communicated with the pressure gauge main body, a sliding groove is formed in the inner wall of one end, close to the second flow channel, of the first flow channel, one end of the sliding block is slidably arranged in the sliding groove, the other end of the sliding block is arranged on the side wall of the first piston, the first piston is movably arranged in the first flow channel, one end of the first spring is connected to the inner wall of the sliding groove, the other end of the first spring is connected to the sliding block.
Preferably, the radial length of the first piston is smaller than the inner radial length of the first flow passage, and the radial length of the first piston is larger than the inner radial length of the second flow passage.
Preferably, the bottom of the upper mounting block is provided with a pressure relief structure, the pressure relief structure comprises a lower mounting block, a second piston, a connecting rod, a sliding sleeve, a limiting block, a sliding rod and a second spring, the lower mounting block is welded at the bottom of the upper mounting block, a third flow passage is arranged in the lower mounting block, a fourth flow channel is arranged at the end part of the lower mounting block, one end of the third flow channel is communicated with the first flow channel, the other end of the third flow channel is communicated with the fourth flow channel, the second piston is movably arranged in the fourth flow channel, one end of the connecting rod is connected to the end face of the lower mounting block, the other end of the connecting rod is connected to the sliding sleeve, the sliding rod is inserted in the sliding sleeve, and one end of the sliding rod is fixed on the second piston, the limiting block is arranged on the sliding rod, and the second spring is sleeved on the sliding rod between the sliding sleeve and the limiting block.
Preferably, the second spring is always in a compressed state.
The utility model provides a prevent excessive pressure type diaphragm capsule manometer, beneficial effect lies in: external air current enters into first runner from the adapter in, because first piston is dragged to first spring, the air current this moment can follow the clearance between first piston and the first runner and flow into the barometer main part through the second runner and carry out the pressure measurement, when the atmospheric pressure of air current was too big, the pressure that atmospheric pressure gave first piston was greater than the elasticity of first spring, and first piston can seal the entrance at the second runner, prevents that too big pressure from getting into the barometer main part and causing the damage.
Drawings
Fig. 1 is a schematic structural view of the overpressure-proof diaphragm capsule pressure gauge provided by the present invention.
Fig. 2 is an enlarged view of a position a of the overpressure-proof type diaphragm pressure gauge according to the present invention.
In the figure: the pressure gauge comprises a pressure gauge main body 1, an upper mounting block 2, an adapter 3, a first flow passage 4, a second flow passage 5, a lower mounting block 6, a third flow passage 7, a fourth flow passage 8, a second piston 9, a connecting rod 10, a sliding sleeve 11, a limiting block 12, a sliding rod 13, a sliding groove 14, a first piston 15, a sliding block 16, a first spring 17 and a second spring 18.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example 1
Referring to fig. 1-2, an overpressure-preventing diaphragm capsule pressure gauge comprises an overpressure protection mechanism, the overpressure protection mechanism is mounted at the input end of a pressure gauge main body 1, the overpressure protection mechanism comprises an upper mounting block 2, an adapter 3, a first piston 15, a slide block 16 and a first spring 17, a first flow passage 4 is formed in one end of the upper mounting block 2, a second flow passage 5 is formed in the other end of the upper mounting block, one end of the first flow passage 4 is communicated with the second flow passage 5, the other end of the first flow passage 4 is communicated with the adapter 3, the caliber of the second flow passage 5 is smaller than that of the first flow passage 4, the second flow passage 5 is communicated with the pressure gauge main body 1, a chute 14 is formed in the inner wall of one end, close to the second flow passage 5, of the first flow passage 4, one end of the slide block 16 is slidably mounted in the chute 14, the other end of the slide block 16, the diameter length of the first piston 15 is larger than the inner diameter length of the second flow passage 5, the first piston 15 is movably placed in the first flow passage 4, one end of a first spring 17 is connected to the inner wall of the sliding groove 14, and the other end of the first spring 17 is connected to the sliding block 16. External air current enters into first flow channel 4 from adapter 3, because first spring 17 pulls first piston 15, the air current at this moment can follow the clearance between first piston 15 and first flow channel 4 and flow into barometer main part 1 through second flow channel 5 and carry out the pressure measurement, when the atmospheric pressure of air current was too big, the pressure that atmospheric pressure gave first piston 15 was greater than the elasticity of first spring 17, first piston 15 can seal at the entrance of second flow channel 5, prevent that too big pressure from entering in the barometer main part 1 and causing the damage.
Example 2
On the basis of the above embodiment 1, as shown in fig. 1, in this embodiment, a pressure relief structure is installed at the bottom of an upper installation block 2, the pressure relief structure includes a lower installation block 6, a second piston 9, a connecting rod 10, a sliding sleeve 11, a limiting block 12, a sliding rod 13 and a second spring 18, the lower installation block 6 is welded at the bottom of the upper installation block 2, a third flow channel 7 is opened inside the lower installation block 6, a fourth flow channel 8 is opened at the end of the lower installation block 6, one end of the third flow channel 7 is communicated with the first flow channel 4, the other end is communicated with the fourth flow channel 8, the second piston 9 is movably installed in the fourth flow channel 8, one end of the connecting rod 10 is connected to the end surface of the lower installation block 6, the other end is connected to the sliding sleeve 11, the sliding rod 13 is inserted into the sliding sleeve 11, one end of the sliding rod 13 is fixed to the second piston 9, the limiting block 12 is, the second spring 18 is always in a compressed state. The pressure relief structure can discharge the gas entering the first flow passage 4 from the fourth flow passage 8 when the first sealing plug 15 seals the second flow passage 5, so as to prevent the equipment from being damaged due to the continuous increase of the pressure in the flow passage.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a prevent excessive pressure type diaphragm capsule manometer, includes overvoltage protection mechanism, its characterized in that: the overvoltage protection mechanism is arranged at the input end of the pressure gauge main body (1), the overvoltage protection mechanism comprises an upper installation block (2), an adapter (3), a first piston (15), a sliding block (16) and a first spring (17), one end of the upper installation block (2) is provided with a first flow channel (4), the other end of the upper installation block is provided with a second flow channel (5), one end of the first flow channel (4) is communicated with the second flow channel (5), the other end of the first flow channel (4) is communicated with the adapter (3), the caliber of the second flow channel (5) is smaller than that of the first flow channel (4), the second flow channel (5) is communicated with the pressure gauge main body (1), the inner wall of one end, close to the second flow channel (5), of the first flow channel (4) is provided with a sliding groove (14), one end of the sliding block (16) is slidably arranged in the sliding groove (14), the other end of the sliding block (16) is installed on the side wall of the first piston (15), the first piston (15) is movably placed in the first flow channel (4), one end of the first spring (17) is connected to the inner wall of the sliding groove (14), and the other end of the first spring (17) is connected to the sliding block (16).
2. A membrane cassette pressure gauge against overpressure as in claim 1, characterized by the fact that the first piston (15) has a smaller diameter than the length of the inner diameter of the first flow channel (4), the first piston (15) having a larger diameter than the length of the inner diameter of the second flow channel (5).
3. The overpressure-preventing type diaphragm capsule pressure gauge as claimed in claim 1, wherein a pressure relief structure is installed at the bottom of the upper installation block (2), the pressure relief structure comprises a lower installation block (6), a second piston (9), a connecting rod (10), a sliding sleeve (11), a limiting block (12), a sliding rod (13) and a second spring (18), the lower installation block (6) is welded at the bottom of the upper installation block (2), a third flow passage (7) is formed inside the lower installation block (6), a fourth flow passage (8) is formed in the end portion of the lower installation block (6), one end of the third flow passage (7) is communicated with the first flow passage (4), the other end of the third flow passage is communicated with the fourth flow passage (8), the second piston (9) is movably installed in the fourth flow passage (8), one end of the connecting rod (10) is connected to the end face of the lower installation block (6), the other end is connected on the sliding sleeve (11), the sliding rod (13) is inserted in the sliding sleeve (11), one end of the sliding rod (13) is fixed on the second piston (9), the limiting block (12) is installed on the sliding rod (13), and the second spring (18) is sleeved on the sliding rod (13) between the sliding sleeve (11) and the limiting block (12).
4. A gauge as claimed in claim 3, wherein the second spring (18) is always in compression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922253214.0U CN211373905U (en) | 2019-12-16 | 2019-12-16 | Overpressure-preventing diaphragm capsule pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922253214.0U CN211373905U (en) | 2019-12-16 | 2019-12-16 | Overpressure-preventing diaphragm capsule pressure gauge |
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| Publication Number | Publication Date |
|---|---|
| CN211373905U true CN211373905U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922253214.0U Active CN211373905U (en) | 2019-12-16 | 2019-12-16 | Overpressure-preventing diaphragm capsule pressure gauge |
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| CN (1) | CN211373905U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623973A (en) * | 2022-03-11 | 2022-06-14 | 胡启亮 | Instrument oil pressure seat with automatic pressure relief function for oil field |
-
2019
- 2019-12-16 CN CN201922253214.0U patent/CN211373905U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623973A (en) * | 2022-03-11 | 2022-06-14 | 胡启亮 | Instrument oil pressure seat with automatic pressure relief function for oil field |
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