CN215767501U

CN215767501U - Hand-tightening quick pressure interface for pressure instrument verification

Info

Publication number: CN215767501U
Application number: CN202122221702.0U
Authority: CN
Inventors: 岑月琴
Original assignee: Henan Delang Electronic Technology Development Co ltd
Current assignee: Henan Delang Electronic Technology Development Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-02-08
Anticipated expiration: 2031-09-14

Abstract

The utility model provides a hand-tightening rapid pressure interface for pressure instrument verification, which belongs to the technical field of piston pressure gauges and comprises an interface core body, wherein a hand-tightening screw cap is installed at the upper end of the interface core body, an installation groove is formed in the upper end of the interface core body, a detected instrument positioned in the installation groove is sleeved in the hand-tightening screw cap, a back pressure assembly used for increasing the sealing property is arranged between the detected instrument and the interface core body, and a shaft check ring positioned on the interface core body is arranged at the lower end of the hand-tightening screw cap; the back pressure component comprises a back pressure body, an axial sealing ring and a radial sealing ring; the utility model can increase the sealing performance between the detected instrument and the interface core body by utilizing the back pressure component, thereby avoiding the leakage between the interface core body and the detected instrument caused by the damage of the sealing ring pressed into the gap when the interface core body detects the detected instrument for a long time.

Description

Hand-tightening quick pressure interface for pressure instrument verification

Technical Field

The utility model relates to the technical field of pressure instruments, in particular to a hand-tightening quick pressure interface for calibrating a pressure instrument.

Background

Pressure standard devices such as piston pressure gauges are mainly used for calibrating field pressure instruments such as pressure gauges, pressure sensors and pressure switches, hand-tightening quick pressure interfaces for calibrating the pressure instruments are usually installed on the pressure standard devices such as the piston pressure gauges, tools are not needed during calibrating the pressure instruments, and the pressure instruments to be calibrated can be screwed down on the pressure interfaces by bare hands.

At present, a conventional hand-tightening quick pressure interface (as shown in fig. 1) for pressure instrument verification is composed of an interface core body 1, a shaft check ring 2, a seal ring 3 and a hand-tightening nut 4. The sealing performance is good under low pressure, when the pressure is higher than 10MPa, the tested instrument 5 is pushed away from the interface core body 1 by the thrust generated by the high-pressure medium, so that the gap between the interface core body 1 and the tested instrument 5 is increased, the edge of the sealing ring 3 is easily pressed into the gap to be damaged, and the sealing ring needs to be frequently replaced; when the pressure exceeds 60MPa, the seal ring 3 is often crushed directly to leak because the gap is further increased. Therefore, a hand-tightened quick pressure interface for pressure gauge verification is proposed to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a hand-tightening fast pressure interface for pressure instrument verification, which can increase the sealing performance between the detected instrument and the interface core.

In order to solve the technical problems, the utility model provides a hand-tightening rapid pressure interface for pressure instrument verification, wherein a detected instrument is installed at the upper end of an interface core body, the detected instrument is connected with the interface core body through a hand-tightening nut, a back pressure component for increasing the sealing property is arranged between the detected instrument and the interface core body, a shaft check ring positioned on the interface core body is arranged at the lower end of the hand-tightening nut, an installation groove is formed in the upper end of the interface core body, and the lower end of the back pressure component is positioned in the installation groove;

the back pressure subassembly includes the backpressure body, axial seal circle and radial seal circle, first annular has been seted up to the backpressure body upper end, the axial seal circle install in first annular and with the lower extreme contact of examined the instrument, the second annular has been seted up in the lower extreme outside of the backpressure body, radial seal circle install in the second annular and with the inner wall contact of mounting groove.

Further, second ring channel upper end is provided with the back of the body circle with radial seal circle contact, the back of the body circle is triangle-shaped, the inclined plane and the radial seal circle contact of back of the body circle, the back of the body circle is soft metal circle, and soft metal circle is the red copper circle.

Further, the diameter of the lower end of the back pressure body is larger than that of the axial sealing ring.

Further, the counter-pressure body is a metal body.

Further, the counter pressure body is stepped.

The technical scheme of the utility model has the following beneficial effects:

1. the back pressure assembly is utilized to increase the sealing performance between the detected instrument and the interface core body, so that the phenomenon that the sealing ring is pressed into a gap to be damaged to cause leakage between the interface core body and the detected instrument when the interface core body detects the detected instrument for a long time is avoided.

2. The axial sealing ring and the radial sealing ring are arranged to have a sealing effect between the interface core body and the detected instrument, wherein a gap between the radial sealing ring and the interface core body can be blocked under the effect of the back ring, so that the sealing pressure of the back pressure assembly is increased.

Drawings

FIG. 1 is a schematic diagram of a prior art configuration;

FIG. 2 is a schematic cross-sectional view of a pressure port configuration of the present invention;

figure 3 is a schematic view of the construction of the backpressure device of the present invention.

In the figure: 1. an interface core; 2. a retainer ring for a shaft; 3. a backpressure component; 4. tightening the screw cap by hand; 5. a detected instrument; 6. mounting grooves; 31. an axial seal ring; 32. a counter-pressure body; 33. a back ring; 34. a radial seal ring; 35. a first ring groove; 36. a second ring groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 3 of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model, are within the scope of the utility model.

Example one

As shown in fig. 2-3: a hand-tight rapid pressure interface for pressure instrument verification is characterized in that a tested instrument 5 is mounted at the upper end of an interface core body 1, the tested instrument 5 is connected with the interface core body 1 through a hand-tight screw cap 4, a back pressure component 3 for increasing pressure resistance is arranged between the tested instrument 5 and the interface core body 1, a shaft check ring 2 located on the interface core body 1 is arranged at the lower end of the hand-tight screw cap 4, a mounting groove 6 is formed in the upper end of the interface core body 1, and the lower end of the back pressure component 3 is located in the mounting groove 6;

the back pressure component 3 comprises a back pressure body 32, an axial sealing ring 31 and a radial sealing ring 34, a first annular groove 35 is formed in the upper end of the back pressure body 32, the axial sealing ring 31 is installed in the first annular groove 35 and is in contact with the lower end of the detected instrument 5, a second annular groove 36 is formed in the outer side of the lower end of the back pressure body 32, the radial sealing ring 34 is installed in the second annular groove 36 and is in contact with the inner wall of the installation groove 6, the diameter of the lower end of the back pressure body 32 is larger than that of the axial sealing ring 31, the back pressure body 32 is a metal body, and the back pressure body 32 is in a step shape.

In this embodiment, the back pressure assembly 3 can increase the sealing performance between the tested meter 5 and the interface core 1, so as to avoid the sealing ring from being pressed into the gap and damaged when the interface core 1 detects the tested meter 5 for a long time, which may cause leakage between the interface core 1 and the tested meter 5.

Wherein, the axial sealing ring 31 and the radial sealing ring 34 are arranged to have the sealing function between the interface core body 1 and the tested instrument 5.

Example two

As shown in fig. 3, the difference from the first embodiment is that: the upper end of the second annular groove 36 is provided with a back ring 33 which is in contact with the radial sealing ring 34, the back ring 33 is triangular, the inclined surface of the back ring 33 is in contact with the radial sealing ring 34, the back ring 33 is a soft metal ring, and the soft metal ring is a red copper ring.

In this embodiment, the back ring 33 will block the gap between the radial sealing ring 34 and the interface core 1, thereby increasing the sealing pressure of the counter-pressure assembly 3.

The working method of the utility model comprises the following steps:

when the pressure instrument is detected, the detected instrument 5 is aligned with the hand-tightening screw cap 4, and the hand-tightening screw cap 4 is rotated clockwise by hand to screw the detected instrument 5 on the pressure interface. During pressurization, a pressure medium enters the detected instrument 5 through the interface core body 1 by a pressure standard device, a gap between the interface core body 1 and the detected instrument 5 is blocked by the axial sealing ring 31, a gap between the back pressure component 3 and the interface core body 1 is blocked by the radial sealing ring 34, and pressure medium oil cannot leak through the gap; particularly, when the applied pressure is continuously increased, the detected instrument 5 is pushed away from the interface core body 1 by the upward force generated by high pressure, because the diameter of the lower part of the back pressure body of the back pressure component 3 is larger than the inner diameter of the axial sealing ring 31, the back pressure component 3 is also pushed away from the interface core body 1 by the upward force generated by high pressure and tightly propped against the detected instrument 5, although the axial sealing ring 31 bears high pressure, the axial sealing ring 31 cannot be damaged by being squeezed into the gap because the gap between the back pressure component 3 and the contact surface of the detected instrument 5 is reduced along with the increase of the pressure, and thus the contact surface of the back pressure component 3 and the detected instrument 5 is kept to be free from leakage; the back ring 33 and the radial sealing ring 34 are used for sealing the gap between the back pressure component 3 and the interface core body 1, and the back ring 33 made of soft metal is arranged between the radial sealing ring 34 and the gap, so that the radial sealing ring 34 presses the back ring 33 to the gap between the back pressure component 3 and the interface core body 1 under high pressure, the gap is blocked by the back ring 33, the radial sealing ring 34 does not directly face the gap, extremely high pressure can be borne without damage, and the sealing pressure is not lower than 500MPa generally.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a pressure instrument is examined and is used tight quick pressure interface, includes interface core (1), its characterized in that: the connector comprises a connector core body (1), wherein the upper end of the connector core body (1) is provided with a detected instrument (5), the detected instrument (5) is connected with the connector core body (1) through a hand-tight nut (4), a back pressure component (3) for increasing the sealing property is arranged between the detected instrument (5) and the connector core body (1), the lower end of the hand-tight nut (4) is provided with a shaft check ring (2) positioned on the connector core body (1), the upper end of the connector core body (1) is provided with a mounting groove (6), and the lower end of the back pressure component (3) is positioned in the mounting groove (6);

back pressure subassembly (3) are including back pressure body (32), axial sealing washer (31) and radial seal circle (34), first annular (35) have been seted up to back pressure body (32) upper end, axial sealing washer (31) are installed in first annular (35) and with the lower extreme contact of examining instrument (5), second annular (36) have been seted up in the lower extreme outside of back pressure body (32), radial seal circle (34) install in second annular (36) and with the inner wall contact of mounting groove (6).

2. The pressure gauge certification hand-grip quick pressure interface of claim 1, wherein: second annular (36) upper end is provided with back of the body circle (33) with radial seal circle (34) contact, back of the body circle (33) is triangle-shaped, the inclined plane and the radial seal circle (34) contact of back of the body circle (33), back of the body circle (33) are soft metal circle, and soft metal circle is the red copper circle.

3. The pressure gauge certification hand-grip quick pressure interface of claim 1, wherein: the diameter of the lower end of the counter-pressure body (32) is larger than that of the axial sealing ring (31).

4. The pressure gauge certification hand-grip quick pressure interface of claim 1, wherein: the counter-pressure body (32) is a metal body.

5. The pressure gauge certification hand-grip quick pressure interface of claim 1, wherein: the counterpressure body (32) is stepped.