CN216846778U

CN216846778U - Sealing device for valve detection

Info

Publication number: CN216846778U
Application number: CN202220564119.1U
Authority: CN
Inventors: 黄臶
Original assignee: Tianjin Beifang Valve Actuator Co ltd
Current assignee: Tianjin Beifang Valve Actuator Co ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-06-28
Anticipated expiration: 2032-03-15

Abstract

The utility model provides a sealing device for valve detection, which comprises a first sealing unit and a second sealing unit, wherein the first sealing unit and the second sealing unit respectively comprise a core bar, the core bar of the first sealing unit is axially provided with an air passage, and the core bar of the second sealing unit is of a solid structure; one end of the core rod is provided with a pressing plate part, the core rod is movably sleeved with a connecting disc, the connecting disc is provided with a connecting hole, an expansion sealing sleeve corresponding to the opening of the valve is sleeved at the position of the core rod between the connecting disc and the pressing plate part, and a guide mechanism for fixing the moving position of the core rod relative to the connecting disc is arranged on one side of the connecting disc, which deviates from the expansion sealing sleeve, of the core rod. The utility model discloses in, utilize the expansion seal cover sealed to the valve opening, and the expansion seal cover degree of deformation passes through the adjustment of guide mechanism, guarantees its sealed effect to the valve, satisfies the valve seal detection of different gas tightness pressure values, has guaranteed the detection precision.

Description

Sealing device for valve detection

Technical Field

The utility model belongs to valve seal nature detection area especially relates to a sealing device is used in valve detection.

Background

In the valve production process, the tightness of the valve is detected after assembly, and whether zero leakage exists under the set pressure of the valve is verified. In the process of detecting the tightness of the valve, firstly two openings of the valve are sealed, then gas or liquid with certain pressure is introduced into the valve, and whether the valve leaks or not is judged by monitoring the pressure change condition of the gas or the liquid in the valve.

In a conventional tightness detection device, a valve is generally sealed by a pressure plate-sealing gasket structure and a sealing plug structure. For the pressure plate-sealing gasket sealing structure, the pressure plate is correspondingly provided with an oil cylinder or an air cylinder, an oil cylinder push rod extends out to drive the pressure plate to tightly press a sealing gasket on the end face of a valve flange opening, and the valve flange opening is sealed through the sealing gasket. For example, in the patent "application No. 202120183984.7, full-automatic ball valve airtightness detection device", two sealing plugs are used to seal two openings of a valve, and in order to prevent high-pressure gas in the valve from pushing out the first and second sealing plugs, the first and second sealing plugs respectively correspond to a spring structure, and the first and second sealing plugs are fixed in the openings of the valve by using the large resilience of the spring. The sealing structure has the problems that when the sealing structure is firstly installed in a valve, the sealing plug needs to be pulled backwards by overcoming the elastic force of the spring manually, the clamping difficulty is high, secondly, the sealing plug in the sealing structure only depends on the rebound force of the spring to ensure the sealing effect, and the sealing requirement when the valve with a large air tightness pressure set value is detected is difficult to meet.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a valve detects uses sealing device reduces the sealing device volume, improves the convenience sealed to the valve opening to can set for the appropriate adjustment sealing performance of pressure value according to the valve, guarantee its sealed effect, solve present use clamp plate-sealed pad sealing mode occupation space big, the inconvenient problem of adjustment, it is big to solve the rubber sealing plug that spring-rubber sealing plug structure leads to simultaneously and packs into the degree of difficulty, and sealed effect difficult assurance problem.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a sealing device for valve detection comprises a first sealing unit and a second sealing unit, wherein the first sealing unit and the second sealing unit respectively comprise a core bar, an expansion sealing sleeve and a connecting disc, the expansion sealing sleeve and the connecting disc are sequentially arranged on the core bar, a pressing plate part is arranged at one end of the core bar, the expansion sealing sleeve is arranged close to the pressing plate part, the outer diameter of the expansion sealing sleeve and the inner diameter of a valve opening are correspondingly arranged, the connecting disc is positioned on the outer side of the expansion sealing sleeve and is axially and movably connected with the core bar, a connecting hole for fixedly connecting with a valve flange is formed in the connecting disc, and an extrusion guide mechanism is arranged on the outer side of the connecting disc of the core bar;

the core rod of the first sealing unit is of a solid structure, and the core rod of the second sealing unit is axially provided with an air passage.

Furthermore, the extrusion guide mechanism comprises an external thread part arranged on the core rod and a nut matched and connected with the external thread part, and the nut is arranged corresponding to the connecting disc.

Furthermore, the polished rod part is arranged at the position, close to the pressing plate part, of the core rod, the external thread part is located at the rear end of the polished rod part and is close to the polished rod part, the diameter of the polished rod part is not smaller than that of the external thread part, the expansion sealing sleeve and the connecting disc are installed on the polished rod part, and the length of the polished rod part is smaller than the sum of the length of the expansion sealing sleeve and the thickness of the connecting disc.

Further, the expansion sealing sleeve and the polished rod part are in interference fit.

Furthermore, a quick-connection head part is arranged at one end, away from the pressing plate part, of the core rod of the second sealing unit.

Furthermore, the number of the connecting holes is 2.

Further, the core bar is a copper piece.

Further, the expansion sealing sleeve is a rubber sealing sleeve.

Compared with the prior art, a valve detects and uses sealing device have following advantage:

(1) the utility model discloses in, utilize the expansion seal cover sealed to the valve opening, and the expansion seal cover deformation degree passes through the guiding mechanism adjustment, guarantees its sealed effect to the valve, satisfies the valve seal detection of different gas tightness pressure values, has guaranteed the detection precision.

(2) The utility model discloses in, through relative position between nut adjustment connection pad and core bar, and then adjustment expansion seal cover deformation situation adjusts at any time its leakproofness promptly, has guaranteed the sealed effect of expansion seal cover to the valve.

(3) The utility model discloses in, first sealed unit and the sealed unit of second can be connected through the connection pad is direct and the valve, need not add other devices or structure, and occupation space is less, and easy operation is reliable.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a first sealing unit in the sealing device of the present embodiment;

FIG. 2 is a schematic structural diagram of a second sealing unit in the sealing device of the present embodiment;

FIG. 3 is a schematic structural diagram of a core rod of a second sealing unit in the embodiment;

fig. 4 is a schematic diagram of the present embodiment.

Description of reference numerals:

1-core bar; 11-a platen portion; 12-a polished rod section; 13-an external threaded portion; 14-a quick-connect header; 15-air passage; 2-expansion sealing sleeve; 3-a connecting disc; 31-a connection hole; 4-a nut; 5-valve.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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 by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

A sealing device for valve detection comprises a first sealing unit and a second sealing unit, wherein the first sealing unit is shown in figure 1, the second sealing unit is shown in figure 2, the first sealing unit and the second sealing unit respectively comprise a core rod 1, and the core rod 1 of the first sealing unit is of a solid structure; the core rod 1 of the second sealing unit is axially provided with an air duct 15. In this embodiment, the core bar 1 is a copper piece.

In this embodiment, the core bar 1 of the first sealing unit and the second sealing unit includes a pressing plate portion 11, a polish rod portion 12, and an external thread portion 13, which are sequentially provided, respectively, and the diameter of the polish rod portion 12 is not smaller than the diameter of the external thread portion 13. Wherein, the core bar 1 of the second sealing unit is also provided with a quick connection head part 14 at the outer end position of the external thread part 13, as shown in figure 3, so as to facilitate the quick connection of the ventilation hose. The pressing plate portion 11 has a circular plate structure. The expansion sealing sleeve 2 and the connecting disc 3 are sleeved on the polished rod part 12, the expansion sealing sleeve 2 and the polished rod part 12 are in interference fit and are arranged close to the pressing plate part 11, the expansion sealing sleeve 2 is a rubber part, and the outer diameter of the expansion sealing sleeve corresponds to the inner diameter of the opening of the valve. The connecting disc 3 is movably sleeved on the polished

rod part

12, and 2 connecting holes 31 for fixedly connecting with a valve flange are symmetrically arranged on the connecting disc 3. The external thread part 13 is matched with a nut 4, and the nut 4 is opposite to the connecting disc 3. In this embodiment, the length of the polish rod portion 12 is smaller than the length of the expansion sealing sleeve 2 and the thickness of the connecting disc 3, so as to ensure that the nut 4 can press the connecting disc 3, and the nut 4 and the external thread portion 13 form an extrusion guiding mechanism which enables the expansion sealing sleeve to be extruded axially and then to expand radially.

The sealing principle of the embodiment is that the expansion sealing sleeve 2 of the rubber part can generate radial expansion under the axial extrusion; therefore, the opening of the valve 5 is sealed by the expansion sealing sleeve 2, the extrusion guide mechanism is used for driving the pressing plate part 11 to extrude the expansion sealing sleeve 2, the expansion sealing sleeve 2 is radially expanded after being extruded, the outer diameter corresponding to the inner diameter of the opening of the valve 5 is further enlarged, the inner surface of the opening of the valve is compressed, and the more excellent sealing effect on the opening of the valve is realized.

In the use process of the embodiment, as shown in fig. 4, two openings of a valve 5 are sealed by using a first sealing unit and a second sealing unit respectively, when sealing is performed, an expansion sealing sleeve 2 is inserted into the opening of the valve 5, at this time, a connecting disc 3 is abutted against a flange of the valve 5, the connecting disc 3 is fixedly connected with the flange of the valve 5 by using a screw, then a nut 4 is screwed in until the nut 4 presses the connecting disc 3 tightly, then the nut 4 is screwed in continuously, the core rod 2 is pulled outwards in the process of the nut being screwed in continuously, so that not only the pressing plate part 11 is driven to move outwards, the expansion sealing sleeve 2 is extruded between the pressing plate part 11 and the connecting disc 3 to generate deformation, and further the opening of the valve 5 is sealed, because the core rod 11 of the first sealing unit is of a solid structure, the corresponding valve opening is completely sealed by the first sealing unit, the core rod of the second sealing unit is provided with a vent passage 15, at this time, the valve 5 is communicated with the outside through the vent passage 15, the quick connector 14 of the core rod 1 provided with the air passage is connected with an air hose, and the detection gas can be input into the valve through the air hose. In this embodiment, can adjust the core bar 1 through the nut and remove length, and then to the timely adjustment of expansion seal cover 2 deformation, guarantee its sealed effect to the valve. Meanwhile, the sealing device of the embodiment can be independently used, other auxiliary structures are not needed, the use is convenient and simple, the occupied space is small, and the controllability of the detection operation is improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a valve detects uses sealing device which characterized in that: the sealing device comprises a first sealing unit and a second sealing unit, wherein the first sealing unit and the second sealing unit respectively comprise a core rod (1) and an expansion sealing sleeve (2) and a connecting disc (3) which are sequentially arranged on the core rod (1), a pressing plate part (11) is arranged at one end of the core rod (1), the expansion sealing sleeve (2) is arranged close to the pressing plate part (11), the outer diameter of the expansion sealing sleeve (2) and the inner diameter of a valve opening are correspondingly arranged, the connecting disc (3) is positioned on the outer side of the expansion sealing sleeve (2) and is axially and movably connected with the core rod (1), a connecting hole (31) fixedly connected with a valve flange is formed in the connecting disc (3), and an extrusion guide mechanism is arranged on the outer side of the connecting disc (3) of the core rod (1);

the core rod (1) of the first sealing unit is of a solid structure, and the core rod (1) of the second sealing unit is axially provided with an air duct (15).

2. The sealing device for valve inspection according to claim 1, wherein: the extrusion guide mechanism comprises an external thread part (13) arranged on the core rod (1) and a nut (4) in matched connection with the external thread part (13), and the nut (4) is arranged right opposite to the connecting disc (3).

3. The sealing device for valve inspection according to claim 2, wherein: the light rod part (12) is arranged at the position, close to the pressing plate part (11), of the core rod (1), the external thread part (13) is located at the rear end of the light rod part (12) and is arranged close to the light rod part (12), the diameter of the light rod part (12) is not smaller than that of the external thread part (13), the expansion sealing sleeve (2) and the connecting disc (3) are installed on the light rod part (12), and the length of the light rod part (12) is smaller than the sum of the length of the expansion sealing sleeve (2) and the thickness of the connecting disc (3).

4. The sealing device for valve inspection according to claim 3, wherein: and the expansion sealing sleeve (2) and the polished rod part (12) are in interference fit.

5. The sealing device for valve inspection according to claim 1, wherein: the core rod (1) of the second sealing unit is provided with a quick-connection head (14) at one end departing from the pressing plate part (11).

6. The sealing device for valve inspection according to claim 1, wherein: the number of the connecting holes (31) is 2.

7. The sealing device for valve inspection according to claim 1, wherein: the core bar (1) is a copper part.

8. The sealing device for valve detection according to claim 1, wherein: the expansion sealing sleeve (2) is a rubber sealing sleeve.