CN215677360U - Protective pressure gauge - Google Patents
Protective pressure gauge Download PDFInfo
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- CN215677360U CN215677360U CN202121899202.6U CN202121899202U CN215677360U CN 215677360 U CN215677360 U CN 215677360U CN 202121899202 U CN202121899202 U CN 202121899202U CN 215677360 U CN215677360 U CN 215677360U
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- pressure gauge
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Abstract
The utility model discloses a protective pressure gauge, which comprises a pressure gauge body and a protective device arranged at a threaded joint of the pressure gauge body; the protection device comprises a shell, a valve cavity and a buffer cavity are arranged in the shell, the valve cavity is communicated with an inlet of the buffer cavity, and an outlet of the buffer cavity is communicated with a pressure inlet of the pressure gauge body; the valve core in the valve cavity is jacked open through a first spring; a piston is arranged in the buffer cavity, and a second spring is arranged between the piston and the bottom end of the buffer cavity; the protective pressure gauge is provided with the protective device, so that the instantaneous overpressure impact of a measured medium can be buffered and limited, and the risk of impact damage to the pressure gauge is reduced.
Description
Technical Field
The utility model belongs to the technical field of measurement, and particularly relates to a protective pressure gauge.
Background
The pressure gauge transmits pressure deformation to the pointer through elastic deformation of sensitive elements (Bourdon tube, bellows and bellows) in the gauge and a conversion mechanism of a movement in the gauge, so that the pointer rotates to display pressure, and when the pressure gauge is subjected to instantaneous overpressure impact of a measured medium, the pointer is easy to return to a zero position or impact below a limiting nail, so that the pressure gauge is damaged.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a protective pressure gauge which is provided with a protective device and can play a role in buffering and limiting instantaneous overpressure impact of a measured medium and reduce the risk of impact damage to the pressure gauge.
The utility model discloses a protective pressure gauge, which comprises a pressure gauge body and a protective device arranged at a threaded joint of the pressure gauge body; the protection device comprises a shell, a valve cavity and a buffer cavity are arranged in the shell, the valve cavity is communicated with an inlet of the buffer cavity, and an outlet of the buffer cavity is communicated with a pressure inlet of the pressure gauge body; the valve core in the valve cavity is jacked open through a first spring; the piston is arranged in the buffer cavity, the second spring is arranged between the piston and the bottom end of the buffer cavity, when the measured medium has instantaneous overpressure, the piston in the buffer cavity can be pushed, and meanwhile, the valve core moves towards an outlet of the valve cavity under the pushing of fluid, so that the opening degree is reduced, and the impact on the pressure gauge body is reduced.
Furthermore, an outlet end of the shell corresponding to the buffer cavity is provided with an internal thread for connecting with a threaded joint of the pressure gauge body; the inlet end of the shell corresponding to the valve cavity is provided with the external thread joint which is consistent with the thread joint of the pressure gauge body in size, the pressure gauge is suitable for the existing pressure gauge, and the protective device can be directly additionally arranged according to actual needs.
Furthermore, the valve core is a steel ball, and a baffle ring for stopping and limiting the steel ball is arranged at the inlet end of the valve cavity; the retaining ring is fixed on the inner wall of the inlet end of the valve cavity through the connecting columns and is used for positioning the steel ball together with the first spring to prevent the steel ball from falling off, and the retaining ring and the hollow structures around the connecting columns are used for allowing a measured medium to flow through, so that the resistance is small.
Furthermore, a conical contact surface is arranged on the inner side of the outlet end of the valve cavity corresponding to the steel ball, a plurality of longitudinal flow channels are arranged on the conical contact surface, when the steel ball is directly attached to the conical contact surface due to instantaneous overpressure of a measured medium, the measured medium flows through the flow channels, and the steel ball is reset under the action of the elastic force of the first spring after pressure is balanced.
Furthermore, a plurality of sealing rings are installed on the excircle of the piston, an air inlet and outlet is formed in the bottom end of the buffer cavity, the sealing performance between the piston and the inner wall of the buffer cavity is guaranteed, and when the piston moves in a reciprocating mode, air at the bottom of the piston flows through the air inlet and outlet; the first spring and the second spring are both tower springs, so that the compressible length is large, and the spring is suitable for narrow spaces.
The utility model has the beneficial effects that: the protective pressure gauge is provided with the protective device, so that the instantaneous overpressure impact of a measured medium can be buffered and limited, and the risk of impact damage to the pressure gauge is reduced.
Drawings
In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. In the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.
As shown in fig. 1: the protection type pressure gauge comprises a pressure gauge body 1 and a protection device arranged at a threaded joint 2 of the pressure gauge body 1; the protection device comprises a shell 3, a valve cavity and a buffer cavity 5 are arranged in the shell 3, the valve cavity is communicated with an inlet of the buffer cavity 5, and an outlet of the buffer cavity 5 is communicated with a pressure inlet of the pressure gauge body 1; the valve core 9 in the valve cavity is jacked open by a first spring 8; the piston 4 is arranged in the buffer cavity 5, the second spring 6 is arranged between the piston 4 and the bottom end of the buffer cavity 5, when the measured medium has instantaneous overpressure, the piston 4 in the buffer cavity 5 is pushed, and meanwhile, the valve core 9 moves towards an outlet of the valve cavity under the pushing of fluid, so that the opening degree is reduced, and the impact on the pressure gauge body 1 is reduced.
In the embodiment, an outlet end of the shell 3, which corresponds to the buffer cavity 5, is provided with an internal thread for connecting with the threaded connector 2 of the pressure gauge body 1; the inlet end of the shell 3 corresponding to the valve cavity is provided with the external thread joint 2 which is consistent with the size of the thread joint 2 of the pressure gauge body 1, the pressure gauge is suitable for the existing pressure gauge, and a protective device can be directly additionally arranged according to actual needs.
In this embodiment, the valve core 9 is a steel ball, and a stop ring 10 for stopping and limiting the steel ball is arranged at the inlet end of the valve cavity; the baffle ring 10 is fixed on the inner wall of the inlet end of the valve cavity through a plurality of connecting columns, and is used for positioning the steel ball together with the first spring 8 to prevent the steel ball from falling off, and the hollow structures around the baffle ring 10 and the connecting columns are used for a measured medium to flow through, so that the resistance is small.
In this embodiment, the inner side of the outlet end of the valve cavity is provided with a conical contact surface corresponding to the steel ball, the conical contact surface is provided with a plurality of longitudinal flow channels 7, when the steel ball is directly attached to the conical contact surface due to instantaneous overpressure of the measured medium, the measured medium flows through each flow channel 7, and the steel ball is reset under the elastic force of the first spring 8 after the pressure is balanced.
In this embodiment, a plurality of sealing rings are installed on the outer circle of the piston 4, the bottom end of the buffer cavity 5 is provided with an air inlet and outlet, so that the sealing performance between the piston 4 and the inner wall of the buffer cavity 5 is ensured, and when the piston 4 moves back and forth, air at the bottom circulates through the air inlet and outlet; the first spring 8 and the second spring 6 are both tower springs, and are large in compressible length and suitable for narrow spaces.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (5)
1. A protection type manometer which characterized in that: the protection device comprises a pressure gauge body and a protection device arranged at a threaded joint of the pressure gauge body; the protection device comprises a shell, a valve cavity and a buffer cavity are arranged in the shell, the valve cavity is communicated with an inlet of the buffer cavity, and an outlet of the buffer cavity is communicated with a pressure inlet of the pressure gauge body; the valve core in the valve cavity is jacked open through a first spring; the buffer cavity is internally provided with a piston, and a second spring is arranged between the piston and the bottom end of the buffer cavity.
2. A protective pressure gauge according to claim 1, wherein: the outlet end of the shell corresponding to the buffer cavity is provided with an internal thread which is used for being connected with a threaded joint of the pressure gauge body; the inlet end of the shell corresponding to the valve cavity is provided with an external thread joint which is consistent with the size of the thread joint of the pressure gauge body.
3. A protective pressure gauge according to claim 2, wherein: the valve core is a steel ball, and a stop ring for stopping and limiting the steel ball is arranged at the inlet end of the valve cavity; the baffle ring is fixed on the inner wall of the inlet end of the valve cavity through a plurality of connecting columns.
4. A protective pressure gauge according to claim 3, wherein: the inner side of the outlet end of the valve cavity is provided with a conical contact surface corresponding to the steel ball, and the conical contact surface is provided with a plurality of longitudinal flow channels.
5. A protective pressure gauge according to claim 4, wherein: a plurality of sealing rings are installed on the excircle of the piston, and an air inlet and outlet is arranged at the bottom end of the buffer cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121899202.6U CN215677360U (en) | 2021-08-13 | 2021-08-13 | Protective pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121899202.6U CN215677360U (en) | 2021-08-13 | 2021-08-13 | Protective pressure gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215677360U true CN215677360U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121899202.6U Active CN215677360U (en) | 2021-08-13 | 2021-08-13 | Protective pressure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215677360U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117928814A (en) * | 2024-01-24 | 2024-04-26 | 阿尔法仪器技术(深圳)有限公司 | Novel micro differential pressure sensor core |
| CN118032204A (en) * | 2024-04-09 | 2024-05-14 | 常州天利智能控制股份有限公司 | Intelligent pressure transmitter of antidetonation resistance to compression |
-
2021
- 2021-08-13 CN CN202121899202.6U patent/CN215677360U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117928814A (en) * | 2024-01-24 | 2024-04-26 | 阿尔法仪器技术(深圳)有限公司 | Novel micro differential pressure sensor core |
| CN118032204A (en) * | 2024-04-09 | 2024-05-14 | 常州天利智能控制股份有限公司 | Intelligent pressure transmitter of antidetonation resistance to compression |
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