CN211725020U

CN211725020U - Filter for pressure calibration

Info

Publication number: CN211725020U
Application number: CN202020259949.4U
Authority: CN
Inventors: 林晨; 武鑫
Original assignee: Beijing Fengtai District Measurement And Testing Institute
Current assignee: Beijing Fengtai District Measurement And Testing Institute
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-10-23
Anticipated expiration: 2030-03-05

Abstract

The utility model discloses a filter for pressure school is examined, including barrel and demountable installation in the internal filter of barrel cavity, the filter is located the barrel and is connected one end with medium conveyor, the filter has the double-screw bolt of cavity and installs in the filter screen of double-screw bolt including nut, the middle part that the middle part has the cavity, double-screw bolt demountable installation in nut rear end, the nut with the barrel watertight. The filter is arranged at the interface end of the pressure gauge, the filter is detachably mounted in the cylinder through nuts, studs and filter screens in the filter, impurities and dust in a pipeline and the pressure gauge are effectively filtered, the filter is conveniently mounted and cleaned through a detachable structure, the pipeline is prevented from being blocked, and the detection precision and the working efficiency of the pressure gauge are improved.

Description

Filter for pressure calibration

Technical Field

The utility model belongs to the technical field of the medium is carried, more specifically says, it relates to a filter for pressure school is examined.

Background

All the liquid, gas or steam is used as power, transmission medium and combustion body to reflect the action of pressure. Therefore, the conditions such as the existence, the size, the change and the like of the pressure are indicated by various pressure gauges, so that the smooth operation is ensured, and particularly, the pressure gauges are required to accurately indicate the use requirements of users in the aspect of safety protection. The existing pressure gauge generally comprises a cylinder body with a hollow middle part, a sewage discharge part connected with the cylinder body, a transmission device for testing pressure and an electric control part for controlling opening and closing of a medium in the cylinder body, wherein two ends of the cylinder body are respectively connected with a pipeline end of a medium conveying device and a pipeline end of a using device.

With the development of industry and the deepening of safety awareness in recent years, the work of ensuring the accuracy and the reliability of the pressure gauge and the periodic verification is heavier and heavier. The pressure gauge (6000 pressure gauges for annual inspection) is an important component of a pressure checking system, most of the pressure gauges which are generally required to be checked are pressure gauges used on boilers and pipeline equipment, the field use environment is severe, and a channel of the pressure gauge is provided with more dust and other impurities.

The working process of the pressure gauge is as follows:

a boost process detection

1. Firstly, a standard pressure gauge and a pressure gauge to be detected are respectively screwed into quick connectors of pipelines, and the standard pressure gauge and the pressure gauge to be detected must be completely screwed to prevent leakage in use, so that the safety of a meter calibrating person is ensured.

2. And secondly, the oil return switch is opened under the condition of emptying air in the pipeline, and the pressure increasing (reducing) hand wheel is rotated anticlockwise to be fully opened.

3. And closing the oil return switch, and rotating the pressure increasing (reducing) hand wheel clockwise, wherein the pressure gradually rises to approach the first detection point, and then the pressure is stably and slowly increased to be adjusted to the required pressure value. After the data of the point standard pressure meter and the pressure meter to be detected are recorded, the pressure continues to be stably and slowly increased clockwise to enable the pressure value to reach the next detection point, and the point-by-point detection is carried out until the detection of the pressure rising process is finished.

B. Detection of the depressurization Process

1. After the pressure rise process is detected and a pressure resistance test is carried out, the pressure increasing (reducing) hand wheel is directly, stably and slowly rotated anticlockwise to reduce pressure and adjust the pressure to a required pressure value.

2. And detecting point by point until the pressure drop process detection is finished.

3. Finally, the pressure in the system is zero when the pressure increasing (decreasing) hand wheel is rotated anticlockwise.

In the actual verification process, the dust and impurities can be brought into the pipeline to cause pipeline blockage in the pressure reduction process. Because the manometer of most of manufacturers production does not have dustproof and filterable function, be not convenient for maintain and wash, and wash the mediation very troublesome to make work efficiency very big decline.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a filter for pressure school is examined, its advantage lies in avoiding dust and debris to be brought into the pipeline, and convenient the washing, improves the precision and the work efficiency of school and examining.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a filter for pressure school is examined, includes barrel and demountable installation in the internal filter of barrel cavity, the filter is located the barrel and is connected one end with medium conveyor, the filter includes that the middle part has the nut of cavity, the middle part has the double-screw bolt of cavity and installs in the filter screen of double-screw bolt, double-screw bolt demountable installation in the nut rear end, the nut with the barrel watertight. The filter is arranged at the interface end of the pressure gauge, the filter is detachably mounted in the cylinder through nuts, studs and filter screens in the filter, impurities and dust in a pipeline and the pressure gauge are effectively filtered, the filter is conveniently mounted and cleaned through a detachable structure, the pipeline is prevented from being blocked, and the detection precision and the working efficiency of the pressure gauge are improved.

By adopting the technical scheme, the cavity at the rear end of the stud is provided with the accommodating part for installing the nut, and the nut is detachably arranged on the accommodating part.

The utility model discloses further set up to: the inner peripheral wall of the nut is provided with an internal thread, the stud is provided with an external thread matched with the internal thread, and the stud is detachably mounted in the nut accommodating part. The nut and the stud can adopt the existing technology and can also achieve the same technical effect.

By adopting the technical scheme, the cavity of the nut and the cavity of the stud are respectively a first channel and a second channel, the diameter of the first channel is larger than that of the second channel, and the front end of the second channel is connected with the rear end of the first channel.

The utility model discloses further set up to: the relative surface of double-screw bolt periphery wall and barrel internal perisporium is equipped with the draw-in groove, the draw-in groove cover is equipped with the sealing washer.

Through adopting above-mentioned technical scheme, the filter screen set up in the second passageway, the filter screen with the second passageway shape, size are fit for. The utility model discloses further set up to: the filter screen is 60 to 120 meshes.

Through adopting above-mentioned technical scheme, the filter screen is equipped with the filtration pore that a plurality of rules set up, filtration pore 150um to 240 um.

The utility model discloses further set up to: the barrel includes the pressure gauge joint main part and detachably installs in the joint of connecting the main part, connect the main part and connect the watertight.

The utility model discloses further set up to: the nut and the stud are detachably mounted on the joint main body, the rear end of the nut extends out of the rear end of the interface main body and extends into the front end of the joint, and the joint is mounted on the joint main body.

To sum up, the utility model has the advantages of it is following: the filter is arranged at the interface end of the pressure gauge, the filter is detachably mounted in the cylinder through a nut, a stud and a filter screen in the filter, the filter is conveniently mounted and cleaned through a detachable structure, the blockage of a pipeline is avoided, and the detection precision and the working efficiency of the pressure gauge are improved.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is an exploded view (section view) of the present invention;

FIG. 3 is a perspective view of the cylinder and the filter integrally connected to the pressure gauge.

Description of reference numerals: 10 is a cylinder body; 11 is a joint main body; 12 is a joint; 2 is a nut; 21 is a containing part; 22 is an internal thread; 23 is a first channel; 24 is a clamping groove; 3 is a stud; 31 is an external thread; 32 is a second channel; and 4, a filter screen.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a filter for pressure is checked, as shown in fig. 1-3, includes a filter for pressure is checked, includes barrel 1 and demountable installation in the barrel 1 cavity filter in the cavity, the filter is located barrel 1 and is connected one end with medium conveyor, the filter includes that the middle part has the nut 2 of cavity, the middle part has the double-screw bolt 3 of cavity and installs in the filter screen 4 of double-screw bolt 3, double-screw bolt 3 demountable installation in 2 rear ends of nut, nut 2 with barrel 1 watertight. The interface end at the manometer promptly barrel 1 sets up the filter, through nut 2, double-screw bolt 3 and filter screen 4 in the filter, realized that the filter demountable installation in barrel 1, and effectively filtered impurity and dust in pipeline and the manometer, and made things convenient for the installation and the washing of filter through detachable construction, avoided the jam of pipeline, improved the detection precision and the work efficiency of manometer.

Specifically, barrel 1 can be external for solitary individual in the manometer, also can be when the preparation manometer through filter and barrel integrated into one piece and manometer one end.

Specifically, the cavity at the rear end of the stud 3 is provided with an accommodating part 21 for mounting the nut 2, and the nut 2 is detachably mounted in the accommodating part 21.

In the embodiment of the present invention, the inner cavity of the stud 3 is distributed in a trapezoidal shape.

More specifically, the inner peripheral wall of the nut 2 is provided with an internal thread 22, the stud 3 is provided with an external thread 31 matched with the internal thread 22, and the stud 3 is detachably mounted in the accommodating part 21 of the nut 2. Of course, the nut 2 and the stud 3 may be formed by conventional techniques, and the same technical effects may be achieved.

In the embodiment of the present invention, the cavity of the nut 2 and the cavity of the stud 3 are respectively a first channel 23 and a second channel 32, the diameter of the first channel 23 is greater than the diameter of the second channel 32, and the front end of the second channel 32 is connected to the rear end of the first channel 23. The diameter of the second channel 32 is larger than that of the first channel 23, so that the circulation capacity of oil (or water) is effectively improved, and the testing precision of the pressure gauge is improved while blockage is avoided.

Specifically, the surface that the periphery wall of double-screw bolt 3 is relative with barrel 1 internal perisporium is equipped with draw-in groove 24, draw-in groove 24 cover is equipped with the sealing washer. The sealing performance of the stud 3 is further improved, and a gasket may be arranged at the interface between the stud 3 and the cylinder 1 to further improve the sealing performance.

In the embodiment of the present invention, the filter screen 4 is disposed in the second channel 32, and the filter screen 4 is adapted to the shape and size of the second channel 32. The filter efficiency can be improved to the greatest extent through the arrangement of the filter screen 4, and meanwhile, the cleaning is convenient. Of course, the screen 4 may be provided between the nut 2 and the stud 3, and the same technical effects may be achieved.

Specifically, the filter screen 4 is a 60-120 mesh filter screen 4, and the filter screen 4 is made of copper.

More specifically, the filter screen 4 is provided with a plurality of regularly arranged filter holes, the filter holes being 150um to 240 um.

In the embodiment of the present invention, the cylinder 1 includes a joint body 11 of the pressure gauge and a joint 12 detachably mounted on the joint body 11, the joint body 11 and the joint 12 are watertight. The filter is installed in the kneck of manometer promptly, is applicable to current most products, need not change the product, also can realize the filter effect, demountable installation mode is threaded connection.

Specifically, the nut 2 and the stud 3 are detachably mounted on the joint main body 11, the rear end of the nut 2 extends out of the rear end of the interface main body and extends into the front end of the joint 12, and the joint 12 is mounted on the joint main body 11. And fixing the nut 2 and the stud 3 at one end of the medium conveying device of the pressure gauge.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. A filter for pressure calibration is characterized by comprising a cylinder body and a filter detachably arranged in a hollow cavity of the cylinder body, wherein the filter is positioned at one end, connected with a medium conveying device, of the cylinder body, the filter comprises a nut with a cavity in the middle, a stud with a cavity in the middle and a filter screen arranged on the stud, the stud is detachably arranged at the rear end of the nut, and the nut and the cylinder body are watertight.

2. A filter for pressure calibration as defined in claim 1, wherein: the cavity at the rear end of the stud is provided with an accommodating part for mounting a nut, and the nut is detachably mounted in the accommodating part.

3. A filter for pressure calibration as defined in claim 2, wherein: the inner peripheral wall of the nut is provided with an internal thread, the stud is provided with an external thread matched with the internal thread, and the stud is detachably mounted in the nut accommodating part.

4. A filter for pressure calibration as defined in claim 2, wherein: the cavity of the nut and the cavity of the stud are respectively a first channel and a second channel, the diameter of the first channel is larger than that of the second channel, and the front end of the second channel is connected with the rear end of the first channel.

5. A filter for pressure calibration as defined in claim 2, wherein: the relative surface of double-screw bolt periphery wall and barrel internal perisporium is equipped with the draw-in groove, the draw-in groove cover is equipped with the sealing washer.

6. A filter for pressure calibration according to claim 4, wherein: the filter screen set up in the second passageway, the filter screen with the second passageway shape, size are fit for.

7. A filter for pressure verification according to claim 6, wherein: the filter screen is 60-120 meshes; the filter screen is equipped with the filtration pore that a plurality of rules set up, filtration pore 150um to 240 um.

8. The filter for pressure calibration according to claim 2, wherein the stud cavities are distributed in a trapezoid shape.

9. A filter for pressure verification according to claim 7, wherein: the barrel includes the joint main part and detachably installs in the joint of connecting the main part, connect the main part and connect the watertight.

10. A filter for pressure verification according to claim 9, wherein: the nut and the stud are detachably mounted on the joint main body, the rear end of the nut extends out of the rear end of the interface main body and extends into the front end of the joint, and the joint is mounted on the joint main body.