CN214699269U

CN214699269U - Purging mechanism

Info

Publication number: CN214699269U
Application number: CN202022676391.2U
Authority: CN
Inventors: 周忠云; 尚洪宝; 冯燕; 胡敏; 蒋继苇
Original assignee: Chongqing Chuanyi Control Valve Co Ltd
Current assignee: Chongqing Chuanyi Control Valve Co Ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-11-12
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a sweep mechanism, including guide ring, endotheca in the guide ring in and with guide ring sliding fit's valve rod and link up in the guide ring inner chamber and be used for leading to the intra-annular gaseous passageway that sweeps. The utility model discloses in sweep the external high-pressure gas source pipe of passageway air inlet and introduce high-pressure gas to the guide ring in, sweep the medium of adhesion on guide ring and the valve rod through high-pressure gas totally, sweep the in-process and can let the valve rod move from top to bottom, utilize valve rod and guide ring fitting surface interact to do benefit to the medium and drop, improve and sweep the effect, this structure can regularly sweep the valve, can effectively prevent because the medium piles up the valve card that causes and pause, improve the valve each parts wearing and tearing condition, improve valve life, it is higher to reduce valve cost of maintenance.

Description

Purging mechanism

Technical Field

The utility model relates to the technical field of valves, in particular to sweep mechanism.

Background

The traditional black water regulating valve structure does not consider a purging structure, and the valve cannot be purged regularly in the using process, so that the medium is accumulated easily on the outer wall of the valve core and the inner wall of the guide ring, and further, the abrasion of each part is serious, the service life is short, and the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a sweep mechanism, should sweep the structure and can clear up inside the valve body, prevent that the medium from piling up, improve the life of valve.

The utility model provides a sweep mechanism, including guide ring, endotheca in the guide ring in and with guide ring sliding fit's valve rod and link up in the guide ring inner chamber and be used for leading to the intra-annular channel that sweeps that lets in gas of guide ring.

Further, the guide ring includes guide section I and connects in the guide section of guide section lower extreme, I inner chamber of guide section enlarges gradually in order to guide the gas flow direction to its upper end, and guide section and valve rod axial sliding fit are in order to form the direction to the valve rod.

Furthermore, the air outlet end of the purging channel is downward opposite to the opening at the upper end of the guide part.

Further, the guide ring also comprises a straight cylinder section, the straight cylinder section is connected between the guide section and the guide section, and the inner diameter of the straight cylinder section is larger than that of the guide section.

Further, the inner wall of the guide section is provided with a straight groove which vertically extends to the lower end of the guide ring.

Further, the lower end of the straight cylinder section is connected with the upper end of the guide section through a guide section II, and the inner diameter of the guide section is gradually reduced from top to bottom.

Furthermore, a shaft shoulder is formed at the upper end of the guide section in the inner cavity of the guide ring, and the straight groove vertically penetrates through the shaft shoulder upwards.

Further, the purging channel is a through hole formed in the upper valve cover.

Furthermore, the air inlet end of the purging channel is connected with a connector used for being connected with an external device, and a plug is sealed at the air inlet end of the connector.

The utility model has the advantages that:

the external high-pressure gas source pipe of the air inlet of the middle purging channel introduces high-pressure gas into the guide ring, the medium adhered to the guide ring and the valve rod is purged completely through the high-pressure gas, the valve rod can move up and down in the purging process, the medium can favorably fall off due to the interaction of the fitting surfaces of the valve rod and the guide ring, the purging effect is improved, the structure can purge the valve regularly, the valve blockage caused by medium accumulation can be effectively prevented, the abrasion condition of each part of the valve is improved, the service life of the valve is prolonged, and the maintenance cost of the valve is reduced; through guide section I, straight section of thick bamboo section, guide section II and guide section both formed the good direction to the valve rod in the guide ring, also do benefit to the guide air current and improve the effect of peeling off to the adhesion medium, the guide ring cooperation straight flute of this structure can reduce the area of contact with the valve rod in addition to do benefit to quick discharge and peel off the thing, effectively prevent that guide ring and valve rod card from pausing.

Drawings

The invention is further described with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partially enlarged schematic view of FIG. 1;

FIG. 3 is another enlarged partial schematic view of FIG. 1;

Detailed Description

In the embodiment, a black water regulating valve is taken as an example to explain a purging mechanism, wherein the purging mechanism is integrated in the black water regulating valve, and is shown in a figure, and the purging mechanism is explained by taking the whole valve body as an example, and comprises a valve seat 4, a valve body 5, a valve seat ring 3 and an upper valve cover 9, wherein a flange 1 is connected to an outlet at the lower end of the valve body, an inner circle of the flange and an outer circle of the valve seat ring are sealed by a metal winding gasket I2, a valve core 8 is connected to the bottom of a valve rod, wherein the outer circle of the valve core and the inner circle of the valve seat are matched to form an open or sealed state, the upper valve cover is sealed on the valve body, a packing gland 10 is sealed on the upper valve cover, the packing gland presses a packing 11 between the valve cover and the upper valve cover, a sliding bearing 12 is arranged between the packing gland and the valve rod, and the lower end of the valve rod is sleeved in a guide ring in a sliding manner;

the purging mechanism comprises a guide ring 7, a valve rod 6 which is sleeved in the guide ring and is in sliding fit with the guide ring, and a purging channel 16 which penetrates through the inner cavity of the guide ring and is used for introducing gas into the guide ring. In the embodiment, the vertical direction is consistent with the axial direction of the valve rod; the passageway sweeps can be for leading the pipeline in the valve body alone, perhaps for seting up the passageway on each part of valve body, sweep the external high-pressure gas source pipe of passageway air inlet and introduce high-pressure gas to the guide ring in, sweep the medium of adhesion on guide ring and the valve rod totally through high-pressure gas, the in-process of sweeping can let the valve rod move from top to bottom, valve rod and guide ring fitting surface interact do benefit to the medium and drop, improve and sweep the effect, this structure can regularly sweep the valve, can effectively prevent because the medium piles up the valve card that causes, improve the valve wearing and tearing condition, improve valve life, it is higher to reduce valve cost of maintenance.

In this embodiment, the guide ring includes a guide section i 7a and a guide section 7b connected to the lower end of the guide section, the inner cavity of the guide section i is gradually enlarged toward the upper opening end thereof to guide the flow direction of the gas, and the guide section is axially and slidably matched with the valve rod to guide the valve rod. Combine the figure to show, I inner chamber of guide section is the truncated cone cavity that upwards enlarges, and the guide section I of this structure does benefit to the guide gas and flows downwards along the inner wall of guide section and gets into the guide section, also does benefit to simultaneously and makes the trend of wind flow blow to the valve rod to one side, does benefit to through the medium that the trend of wind peeled off and adhere to on guide ring and valve rod, improves the effect of sweeping, and wherein the internal diameter of guide section and the external diameter adaptation of valve rod, the two clearance fit is in order to form the axial sliding direction.

In this embodiment, the air outlet end of the purge channel 16 faces downward to the opening at the upper end of the guide portion 7 a. The blowing channel is composed of a horizontal section and a vertical section, wherein the horizontal section extends to the outside of the valve body and is used for being connected with external air supply equipment, the vertical section extends downwards and is right opposite to the upper opening end of the guide part, high-pressure airflow is favorably vertically and directly blown into the guide ring, and the blowing effect is improved.

In this embodiment, the guide ring further includes a straight cylinder section 7c, the straight cylinder section is connected between the guide section and the guide section, and the inner diameter of the straight cylinder section is larger than that of the guide section. The straight section of thick bamboo inner chamber is cylindricly, and straight section of thick bamboo internal diameter is greater than the valve rod internal diameter, and straight section of thick bamboo internal diameter is the same with I lower extreme internal diameter of guide section, has formed annular passageway that overflows between straight section of thick bamboo section and the valve rod, does benefit to wind current circumference and forms the parcel to the valve rod, improves the efficiency of peeling off to the attachment.

In this embodiment, the inner wall of the guide section 7b is provided with a straight groove 17 vertically extending to the lower end of the guide ring. As shown in the attached drawing, the straight grooves 17 are uniformly distributed on the inner wall of the guide section in the circumferential direction, and can also play a role of a scraper to assist in peeling off attachments in the up-and-down sliding process of the valve rod, and the arrangement of the straight grooves is also favorable for wind flow to bring the attachments to be quickly discharged.

In this embodiment, the lower end of the straight cylinder section is connected with the upper end of the guide section through a guide section II 7d, and the inner diameter of the guide section is gradually reduced from top to bottom. The guide section II is a tapered cavity which is reduced downwards, the guide section II is in arc transitional connection with the straight cylinder section, and the structure can further guide the wind flow to flow downwards and form a high-pressure area, so that the peeling of attachments is facilitated, the wind flow can be rapidly discharged through the straight groove, and the peeled attachments are prevented from blocking the straight groove.

In this embodiment, a shaft shoulder is formed at the upper end of the guide section in the inner cavity of the guide ring 7, and the straight groove vertically penetrates the shaft shoulder upwards. The shaft shoulder is an inner shaft shoulder protruding out of the inner circle, and as shown in the attached drawing, the inner diameter of the guide section is smaller than that of the lower end of the guide section II to form the inner shaft shoulder, and the shaft shoulder can be used as a cutter to assist in stripping attachments on the valve rod.

In this embodiment, the purge channel 16 is a through hole formed in the upper valve cover. The purge channel 16 opens directly into the upper bonnet and facilitates direct flow to the upper end of the guide ring, and the arrangement is simple.

In this embodiment, the air inlet end of the purging channel is connected with a connector 13 for connecting with an external device, and the air inlet end of the connector is sealed with a plug 14. The peripheral hardware can be for pressing the fan, combines the figure to show, connects 13 to have for the helicitic texture, connects the sealed internal rotation of screw in sweeping the passageway inlet end, and the end cap has the internal thread, and the end cap screw is outer revolved in the inlet end that connects, and it is sealed through sealed pad 15 to connect between joint inlet end and end cap axial, connects the sealing connection of external screw thread structure be convenient for with the end cap, also does benefit to with outside high pressure blast pipe screw thread sealing connection.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A purging mechanism, characterized in that: the device comprises a guide ring, a valve rod and a purging channel, wherein the valve rod is sleeved in the guide ring in an inner mode and is in sliding fit with the guide ring, and the purging channel penetrates through the inner cavity of the guide ring and is used for introducing gas into the guide ring.

2. The purge mechanism of claim 1, wherein: the guide ring includes guide section I and connects in the guide section of guide section lower extreme, I inner chamber of guide section enlarges gradually in order to guide the gas flow direction to its upper end, and guide section and valve rod axial sliding fit are in order to form the direction to the valve rod.

3. The purge mechanism of claim 2, wherein: the air outlet end of the purging channel is downward opposite to the opening at the upper end of the guide part.

4. The purge mechanism of claim 2, wherein: the guide ring further comprises a straight cylinder section, the straight cylinder section is connected between the guide section and the guide section, and the inner diameter of the straight cylinder section is larger than that of the guide section.

5. The purge mechanism of claim 2, wherein: and a straight groove vertically extending to the lower end of the guide ring is formed in the inner wall of the guide section.

6. The purge mechanism of claim 4, wherein: the lower end of the straight cylinder section is connected with the upper end of the guide section through a guide section II, and the inner diameter of the guide section is gradually reduced from top to bottom.

7. The purge mechanism of claim 5, wherein: the upper end of the guide section forms a shaft shoulder in the inner cavity of the guide ring, and the straight groove vertically penetrates through the shaft shoulder upwards.

8. The purge mechanism of claim 1, wherein: the purging channel is a through hole formed in the upper valve cover.

9. The purge mechanism of claim 1, wherein: the air inlet end of the purging channel is connected with a connector used for being connected with an external device, and a plug is sealed at the air inlet end of the connector.