CN212960171U

CN212960171U - Novel pre-tightening seat structure of self-sealing valve

Info

Publication number: CN212960171U
Application number: CN202021321491.7U
Authority: CN
Inventors: 张张远; 陈凡; 陈建克; 张林巧
Original assignee: Zhejiang Naigao Valve Co ltd
Current assignee: Zhejiang Naigao Valve Co ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-04-13
Anticipated expiration: 2030-07-07

Abstract

The utility model provides a novel pretension seat structure of self-sealing valve, which relates to the valve field, and comprises a valve body, a valve cover, pretension screws, four open rings and a pretension seat, wherein a sealing element is clamped between the middle part to the top of the valve cover and the valve body, the middle part of the valve cover is arranged upwards to the interval between the top and the valve body, the middle part of the seat body of the pretension seat is provided with at least two pretension screws, the bottom end of each pretension screw passes through the seat body of the pretension seat from top to bottom and is abutted against the upper end face of a gland, the gland is clamped between the valve body and the valve cover, and the bottom end of the gland is in; the bottom surface of the four open rings is lower than the middle part of the valve cover because of the interval end surface between the four open rings and the valve body. The utility model discloses a thereby raise the valve gap when utilizing pretension screw to support the clamp plate and provide a pretightning force to the self-sealing ring in pretension seat and valve gap threaded connection, make pretension seat structure mutually support with the self-sealing ring structure, ensure the safety in sealed effect and the use.

Description

Novel pre-tightening seat structure of self-sealing valve

Technical Field

The utility model relates to a valve field specifically says a novel pretension seat structure of self sealss valve.

Background

The multi-lug supporting and pre-tightening structure comprises a valve body, a valve rod, a valve cover, a support frame, a pressing sleeve and a packing press plate, wherein the support frame is sleeved and positioned on the outer circumference of the upper part of the valve cover in a threaded connection mode, an inner hole of the packing press plate is sleeved on the valve rod, the packing press plate and the support frame are connected through two movable joint bolts, the support frame comprises a support sleeve coaxially sleeved on the outer circle of the upper part of the valve cover, and the left side and the right side of the outer circle of the support sleeve are respectively provided with a hinged lug seat; evenly be provided with a plurality of lug on supporting the cover excircle, penetrating screw hole about all having seted up on every lug, the equal threaded connection of every threaded hole has a pretension screw.

Although the operation of screwing the pre-tightening bolt and the nut is moved from inside to outside so as to be convenient for operation, the pre-tightening bolt is matched with the valve body by virtue of the flange, on one hand, the structure is still complex, and the problem of inconvenient assembly exists; on the other hand, the self-sealing structure is not connected with the pre-tightening bolt, so that the sealing effect is possibly influenced.

The present application was made based on this.

Disclosure of Invention

In order to solve among the above-mentioned prior art pretension seat installation inconvenient, with lack the cooperation of self sealss structure lead to the not good technical problem of sealed effect, the utility model provides a simple structure, the novel pretension seat structure of self sealss valve of being convenient for assembly, mutually support between its and the self sealss structure, ensure sealed effect.

In order to solve the above problem, the utility model discloses a technical scheme as follows:

a novel self-sealing valve pre-tightening seat structure comprises a valve body, a valve cover, pre-tightening screws, a gland, four open rings and the pre-tightening screws, wherein the valve cover and the valve body are arranged at intervals from the middle part to the top part, the pre-tightening seat is sleeved at the upper end of the valve cover in a threaded manner, and the end face of the pre-tightening seat is aligned with the end face of the valve cover; the middle part of the seat body of the pre-tightening seat is provided with at least two pre-tightening screws, the bottom ends of the pre-tightening screws penetrate through the seat body of the pre-tightening seat from top to bottom and are abutted against the upper end face of the gland, and the bottom end of the gland is in contact fit with the upper end face of the four open rings exposed out of the valve body; the gland is clamped between the valve body and the valve cover. The bottom surface of the four open rings is lower than the middle part of the valve cover because of the interval end surface between the four open rings and the valve body.

In the structure, the pre-tightening seat is in threaded connection with the valve cover, so that the pre-tightening screw is utilized to support the pressing plate and simultaneously raise the valve cover to provide a pre-tightening force for the self-sealing ring, the pre-tightening seat structure and the self-sealing ring structure are mutually matched, and the safety of a sealing effect and the safety in the use process are ensured.

And, the clamp plate cooperates with pretension screw and briquetting simultaneously in the above-mentioned structure, and it concentrates different structures in traditional structure in an organic whole, has reduced the complexity of pretension seat structure, self-sealing structure to the assembly is convenient for. And, the clamp plate presss from both sides and establishes between valve body and valve gap among the above-mentioned structure, utilizes valve gap, valve body to the horizontal holding power of clamp plate and four split rings to its reaction force to support the clamp plate, the assembly of being more convenient for.

In order to enable the gland to be stressed uniformly and further apply pressure to the four-open ring uniformly, the pre-tightening screw abuts against the middle of the gland.

In order to ensure the vertical transmission of the pretightening force, the bottom surface of the pretightening screw is a horizontal plane parallel to the upper end surface of the gland.

Furthermore, the outer side of the bottom end of the gland is in contact fit with the exposed upper end surface of the four open rings, and the inner side of the bottom end of the gland is provided with a protruding part in clearance fit or clearance-free fit with the side surfaces of the four open rings opposite to the valve cover. The bulge is used for limiting the inward movement of one side (inner side for short) of the four-open ring towards the valve cover, and the four-open ring can be effectively prevented from being separated from the valve body.

Further, the side face, opposite to the valve cover, of the four-open ring is located in the vertical range of the diameter of the pre-tightening screw.

Furthermore, the four open rings are exposed out of the bottom surface of the valve body and are in contact fit with a sealing element which is positioned below the four open rings and clamped between the valve body and the valve cover.

Further, the side of the four-open ring opposite to the valve cover is matched with the bulge of the gland to have the height 1/4 equal to the height of the side.

Further, the seal includes a self-sealing ring and a ring gasket.

Further, the self-sealing ring is a graphite sealing ring with a stainless steel edge covering part coated at the upper end and the lower end and a wedge surface arranged at the lower part, and the ring gasket is a woven graphite sealing ring with the strength greater than that of the self-sealing ring.

The utility model discloses beneficial effect as follows:

1. the structure is compact and is suitable for valves with middle and small calibers;

2. the disassembly is simple and convenient without additional tools;

3. applying pretightening force directly through the pretightening screw;

4. the filler bolt can be mounted on the screw seat;

5. other structures of the valve cover are not damaged, and the overall strength of the valve cover is ensured.

Drawings

Fig. 1 is a general schematic diagram of an embodiment of the present invention.

Fig. 2 is a partially enlarged view of the point I in fig. 1.

Shown in the figure: 1-pretension screw, 2-pretension seat, 3-gland, 4-four open rings, 5-self-sealing ring, 6-valve gap, 7-valve body, 8-packing, 9-valve rod, 10-packing clamp plate, 11-hexagon nut, 12-bolt, 301-bulge side, 401-four open ring upper end face, 402-four open ring inside wall, 601-middle end face.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Embodiment 1 is as shown in fig. 1, and this embodiment provides a novel pretension seat structure of self sealss valve, including valve body 7, valve gap 6, pretension screw 1, four-open ring 4, gland 3 and pretension seat 2, press from both sides between middle part to the top of valve gap 6 and valve body 7 and be equipped with the sealing member, and the middle part of valve gap 6 upwards sets up to the interval between top and the valve body 7. The gland 3 is clamped between the middle upper part of the valve cover 6 and the valve body 7. In this embodiment, the seal comprises a self-sealing ring 5 and a ring gasket. The self-sealing ring 5 is a graphite sealing ring with a stainless steel edge covering part and a wedge surface at the lower part, and the ring gasket is a woven graphite sealing ring with the strength greater than that of the self-sealing ring 5.

The pre-tightening seat 2 is sleeved at the upper end of the valve cover 6 in a threaded manner, and the upper end face of the pre-tightening seat is aligned with the top end face of the valve cover 6. The middle part of the seat body of the pre-tightening seat 2 is provided with at least two pre-tightening screws 1, the bottom ends of the pre-tightening screws 1 penetrate through the seat body of the pre-tightening seat 2 from top to bottom and are abutted against the upper end face of a gland 3, and the pre-tightening screws 1 are abutted against the middle part of the gland 3. In this embodiment, the bottom surface of the pre-tightening screw 1 is a horizontal plane parallel to the upper end surface of the gland 3.

An annular groove is formed in the valve body 7 and located above the sealing element, the outer sides of the four open rings 4 are embedded in the annular groove, and the inner sides of the four open rings are exposed out of the bottom of the valve body 7. The bottom surface of the part of the four-open ring 4 exposed out of the valve body 7 is in contact fit with a sealing member positioned below the four-open ring. The upper end surface 401 of the four-open ring 4 exposed to the valve body 7 is in contact with the bottom end of the gland 3, and naturally, the upper end surface of the four-open ring 4 and the bottom end of the gland 3 are also horizontal surfaces. As shown in fig. 1, the inner side wall 401 of the four-open ring 4 opposite to the valve cover 6 is located within the vertical range of the diameter of the preload screw 1.

In one embodiment, the bottom surface of the four-open ring 4 is lower than the middle end surface 601 of the valve cover 6 formed in the middle of the valve cover 6 by the space between the four-open ring 4 and the valve body 7, so that the bottom surface of the inner side wall 401 of the four-open ring 4 is in contact fit with the outer side wall of the middle lower part of the valve cover 6. Correspondingly, the outer side of the bottom end of the gland 3 is in contact fit with the exposed upper end surface of the four-open ring 4, and the inner side of the bottom end of the gland is provided with a bulge which is in clearance fit or clearance-free fit with the side surface of the four-open ring 4 opposite to the valve cover 6. There is the difference in height in the position that the bottom of gland 3 is close to one side outside to form bulge side 301 in the bulge, and the top of four-ring opening inside wall 401 promptly with bulge side 301 clearance fit, and the cooperation height equals this side height 1/4.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims

1. The utility model provides a novel pretension seat structure of self sealss valve, includes valve body, valve gap, pretension screw, four ring openings and pretension seat, press from both sides between middle part to the top of valve gap and the valve body and be equipped with the sealing member, the middle part of valve gap upwards sets up its characterized in that to the interval between top and the valve body: the pre-tightening seat is sleeved at the upper end of the valve cover in a threaded manner, and the end face of the pre-tightening seat is aligned with the end face of the valve cover; the middle part of the seat body of the pre-tightening seat is provided with at least two pre-tightening screws, the bottom ends of the pre-tightening screws penetrate through the seat body of the pre-tightening seat from top to bottom and are abutted against the upper end face of a gland, and the gland is clamped between the valve body and the valve cover; the bottom end of the gland is in contact fit with the upper end surface of the four open rings exposed out of the valve body; the bottom surface of the four open rings is lower than the middle part of the valve cover because of the interval end surface between the four open rings and the valve body; the bottom surface of the pre-tightening screw is a horizontal plane parallel to the upper end surface of the gland.

2. The novel pre-tensioned seat construction of a self-sealing valve as set forth in claim 1 wherein: the pre-tightening screw is abutted to the middle part of the gland.

3. The novel pre-tensioned seat structure of a self-sealing valve as claimed in claim 1 or 2, characterized in that: the outer side of the bottom end of the gland is in contact fit with the exposed upper end surfaces of the four open rings, and the inner side of the bottom end of the gland is provided with a protruding part in clearance fit or clearance fit with the side surfaces of the four open rings opposite to the valve cover.

4. The novel pre-tensioned seat construction of a self-sealing valve as claimed in claim 3, wherein: the side face of the four-open ring opposite to the valve cover is positioned in the vertical range of the diameter of the pre-tightening screw.

5. The novel pre-tightening seat structure for self-sealing valves as claimed in any one of claims 1, 2 and 4, wherein: the four open rings are exposed out of the bottom surface of the valve body and are in contact fit with the sealing piece positioned below the four open rings.

6. The novel pre-tensioned seat construction of a self-sealing valve as claimed in claim 3, wherein: the matching height of the side surface of the four-open ring opposite to the valve cover and the bulge of the gland is equal to 1/4 of the height of the side surface.

7. The novel pre-tightening seat structure for self-sealing valves as claimed in any one of claims 1, 2 and 4, wherein: the seal includes a self-sealing ring and a ring gasket.

8. The novel pre-tensioned seat construction of a self-sealing valve as set forth in claim 7 wherein: the self-sealing ring is a graphite sealing ring with a stainless steel edge covering part and a wedge surface arranged at the lower part, and the ring gasket is a woven graphite sealing ring with the strength greater than that of the self-sealing ring.