CN220378928U - Online pretension structure of ball valve and soft seal floating ball valve - Google Patents

Abstract

The utility model discloses an online pre-tightening structure of a ball valve and a soft sealing floating ball valve, wherein the online pre-tightening structure of the ball valve comprises a shell, a valve rod and a gland, the shell is provided with a central shaft channel, an inner flange extending along the radial direction is arranged in the central shaft channel, the valve rod penetrates through the central shaft channel, a filler is arranged between the outer wall of the valve rod and the inner wall of the central shaft channel, the gland is provided with an avoidance hole, the valve rod penetrates through the avoidance hole and can rotate relative to the avoidance hole, the side part of the gland is provided with a first matching part extending outwards, the shell is correspondingly provided with a second matching part, a thread adjusting structure is arranged between the first matching part and the second matching part, and the first matching part can move relative to the second matching part through the thread adjusting structure so that the gland and the inner flange form a clamping arrangement on the filler. The first matching part moves relative to the second matching part through the thread adjusting structure, so that the gland is driven to move to compress the packing, other components on the valve rod do not need to be disassembled, on-line pre-tightening adjustment is realized, and daily pre-tightening adjustment is convenient to use.

Description

Online pretension structure of ball valve and soft seal floating ball valve

Technical Field

The utility model relates to the technical field of valve devices, in particular to an online pre-tightening structure of a ball valve and a soft sealing floating ball valve.

Background

Ball valves are common fluid valves, which generally consist of a shell, a ball core, a valve rod and other components, wherein the ball core is arranged on the shell and is connected with the valve rod, so that the ball core is controlled to rotate through the valve rod, and the on-off control between the inlet end and the outlet end of the shell is realized. Some ball valves in the prior art, such as soft seal floating ball valves, are provided with a filler in a channel of a shell inserted into a valve rod, a nut is arranged on the valve rod to compress the filler so as to seal between the valve rod and the shell by using the filler, but the sealing effect of the filler is affected due to the possibility of looseness of the nut in the subsequent use process, so that the nut needs to be constantly pre-tightly regulated, in the prior art, the nut on the valve rod needs to be pre-tightly regulated by disassembling a handle or a driving assembly and the like installed on the valve rod, and after the regulation is completed, the components such as the handle or the driving assembly are also required to be reinstalled, so that the operation is troublesome and the routine regulation and use are inconvenient.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides an online pre-tightening structure of the ball valve, which can enable the first matching part to move relative to the second matching part through the thread adjusting structure, so that the gland is driven to move to compress the filler, other components on the valve rod are not required to be disassembled, online pre-tightening adjustment is realized, and daily pre-tightening adjustment is convenient to use.

The utility model also provides a soft sealing floating ball valve with the online pre-tightening structure of the ball valve.

According to the online pre-tightening structure of the ball valve, the online pre-tightening structure comprises a shell, a valve rod and a gland, wherein the shell is provided with a central shaft channel, an inner flange extending along the radial direction is arranged in the central shaft channel, the valve rod penetrates through the central shaft channel, a filler is arranged between the outer wall of the valve rod and the inner wall of the central shaft channel, the gland is provided with an avoidance hole, the valve rod penetrates through the avoidance hole and can rotate relative to the avoidance hole, the side part of the gland is provided with a first matching part extending outwards, the shell is correspondingly provided with a second matching part, a thread adjusting structure is arranged between the first matching part and the second matching part, and the first matching part can move relative to the second matching part through the thread adjusting structure so that the gland and the inner flange form a clamp for the filler.

According to the online pre-tightening structure of the ball valve, the online pre-tightening structure has at least the following beneficial effects: when needing to adjust the degree of compressing tightly to packing, accessible screw thread adjustment structure makes first cooperation portion remove relative second cooperation portion to drive the gland and remove, cooperation inward flange compresses tightly the regulation to packing, because the valve rod wears to establish dodging the hole on the gland and can dodge the hole relatively and rotate, therefore the pretension of gland is adjusted and can not influence the valve rod, and first cooperation portion is the outside structure that extends of lateral part of relative gland, when operating screw thread adjustment structure, need not to dismantle other components on the valve rod, realizes the effect of online pretension regulation, makes things convenient for daily pretension to adjust and uses.

According to some embodiments of the utility model, the gland is provided with a downwardly extending extrusion that extends into the bottom bracket passageway, and the packing is located between the extrusion and the inner flange and is provided with multiple layers.

According to some embodiments of the utility model, a sealing ring is sleeved on the valve rod, and the sealing ring is located in the middle shaft channel and abuts against the inner flange.

According to some embodiments of the utility model, the thread adjusting structure includes a bolt member and a nut member, the bolt member passing through the first fitting portion and the second fitting portion and being threadedly fitted with the nut member.

According to some embodiments of the utility model, a dish-shaped spring is arranged between the nut member and the first matching part or between the nut member and the second matching part.

According to some embodiments of the utility model, the first mating portion or the second mating portion is provided with a rotation limiting structure capable of limiting rotation of the bolt member.

According to some embodiments of the utility model, the rotation limiting structure comprises a limiting concave position matched with the head of the bolt, and the head of the bolt is clamped in the limiting concave position.

According to some embodiments of the utility model, two first matching parts are provided, the two first matching parts are respectively positioned at two opposite sides of the gland, and the two second matching parts are provided and are distributed corresponding to the two first matching parts.

According to some embodiments of the utility model, the housing is provided with a containing recess for containing the gland, the gland is arranged in the containing recess, and the first matching part extends out of the containing recess.

According to a second aspect of the utility model, a soft seal floating ball valve is provided, comprising an on-line pretension structure of the ball valve according to the embodiment of the first aspect of the utility model.

The soft sealing floating ball valve provided by the embodiment of the utility model has at least the following beneficial effects: through adopting foretell ball valve's online pretension structure, when needing to adjust the degree of packing, need not to dismantle other components on the valve rod, realize the effect of online pretension regulation, make things convenient for daily pretension to adjust and use.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a soft seal floating ball valve according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the exploded construction of the soft seal floating ball valve of FIG. 1;

FIG. 3 is a schematic top view of the soft seal floating ball valve of FIG. 1;

FIG. 4 is one of the partial cross-sectional schematic views of the soft seal floating ball valve of FIG. 1;

FIG. 5 is a second schematic partial cross-sectional view of the soft seal floating ball valve of FIG. 1.

Reference numerals:

the housing 100, the middle shaft channel 101, the accommodating concave position 102, the valve cavity 103, the inner flange 110 and the second matching part 120;

valve stem 200, packing 210, seal ring 220, handle 230;

the device comprises a gland 300, an avoidance hole 301, a limit concave position 302, a first matching part 310, an extrusion part 320, a bolt member 330, a nut member 340 and a disc-shaped elastic sheet 350;

the core 400.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that if an orientation or positional relationship such as upper, lower, front, rear, left, right, etc. is referred to in the description of the present utility model, it is merely for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, if a number, greater than, less than, exceeding, above, below, within, etc., words are present, wherein the meaning of a number is one or more, and the meaning of a number is two or more, greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number.

The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1, 2 and 5, a soft sealing floating ball valve comprises an online pre-tightening structure of the ball valve, the online pre-tightening structure of the ball valve comprises a shell 100, a valve rod 200 and a gland 300, the shell 100 is provided with a central shaft channel 101, an inner flange 110 extending along the radial direction is arranged in the central shaft channel 101, the valve rod 200 penetrates through the central shaft channel 101, a packing 210 is arranged between the outer wall of the valve rod 200 and the inner wall of the central shaft channel 101, the gland 300 is provided with an avoidance hole 301, the valve rod 200 penetrates through the avoidance hole 301 and can rotate relative to the avoidance hole 301, a first matching part 310 extending outwards is arranged on the side part of the gland 300, a second matching part 120 is correspondingly arranged on the shell 100, a thread adjusting structure is arranged between the first matching part 310 and the second matching part 120, and the first matching part 310 can move relative to the second matching part 120 through the thread adjusting structure, so that the gland 300 and the inner flange 110 form clamping to the packing 210.

It can be understood that, as shown in fig. 5, the soft sealing floating ball valve further comprises a ball core 400, the inside of the shell 100 is provided with a valve cavity 103, the middle shaft channel 101 is vertically penetrated and communicated with the valve cavity 103 at the lower side, the ball core 400 is arranged in the valve cavity 103 and connected with the valve rod 200, the upper end of the valve rod 200 is connected with a handle 230 so as to conveniently drive the valve rod 200 to rotate, and the valve rod 200 drives the ball core 400 to rotate so as to realize on-off control between the inlet end and the outlet end of the shell 100; a packing 210 is arranged between the outer wall of the valve rod 200 and the inner wall of the middle shaft channel 101, the packing 210 is positioned on the upper side of the inner flange 110, the gland 300 is positioned below the handle 230, and the valve rod 200 penetrates the gland 300 through the avoidance hole 301.

When the degree of compaction of the packing 210 needs to be regulated, the first matching part 310 moves up and down relative to the second matching part 120 through the thread regulating structure, so that the gland 300 is driven to move up and down, the inner flange 110 is matched to carry out compaction regulation on the packing 210, as the valve rod 200 penetrates through the avoidance hole 301 on the gland 300 and can rotate relative to the avoidance hole 301, the pre-tightening regulation of the gland 300 can not affect the valve rod 200, and the first matching part 310 is of an outwards extending structure relative to the side part of the gland 300, other components on the valve rod 200 are not required to be disassembled when the thread regulating structure is operated, the effect of online pre-tightening regulation is realized, and the use of daily pre-tightening regulation is convenient.

In practical application, the upper side of the valve rod 200 may be further connected with a driving assembly, and the specific structures of the housing 100, the valve rod 200 and the gland 300 may be set according to practical use requirements, which will not be described in detail herein. Since other configurations of the soft seal floating ball valve of the embodiments of the present utility model are known to those of ordinary skill in the art, they will not be described in detail herein.

In some embodiments, the gland 300 is provided with a downwardly extending extrusion 320, the extrusion 320 extending into the bottom bracket channel 101, and the packing 210 being positioned between the extrusion 320 and the inner flange 110 and being provided with multiple layers.

As can be appreciated, as shown in fig. 2, 4 and 5, the pressing portion 320 extends into the bottom bracket channel 101 and cooperates with the inner flange 110 to sandwich the packing 210, thereby facilitating the pressing of the packing 210; the packing 210 is provided with a plurality of layers, the upper packing 210 can be V-shaped tetrafluoroplastic or graphite, and is used as a main seal, the lower packing 210 is used as a first seal, and meanwhile, the packing can also play a role similar to a shaft sleeve between the valve rod 200 and the shell 100, so that the packing is convenient to use. In practical applications, the specific materials and layers of the filler 210 can be set according to practical requirements.

In some embodiments, the valve stem 200 is provided with a sealing ring 220, and the sealing ring 220 is located in the bottom bracket channel 101 and abuts against the inner flange 110.

It can be appreciated that, as shown in fig. 4 and 5, by sleeving the sealing ring 220 on the valve rod 200, the sealing ring 220 is abutted against the inner flange 110, so that the auxiliary sealing between the valve rod 200 and the housing 100 can be achieved, the sealing effect is enhanced, and the use is convenient. In practical application, when the medium is an organic solvent or an alkali medium, the sealing ring 220 with different materials can be selected according to different specific mediums.

In some embodiments, the thread adjusting structure includes a bolt member 330 and a nut member 340, the bolt member 330 passing through the first and second fitting portions 310 and 120 and being threadedly engaged with the nut member 340.

As can be appreciated, as shown in fig. 1, 2 and 5, the bolt member 330 is threaded through the first matching portion 310 and the second matching portion 120, the head portion thereof abuts against the first matching portion 310, the lower end thereof is in threaded fit with the nut member 340, during pre-tightening adjustment, the nut member 340 is screwed to be close to the head portion of the bolt member 330, and the head portion of the bolt member 330 is matched with the nut to push the first matching portion 310 and the second matching portion 120 to be relatively close, so that the gland 300 moves downwards relative to the housing 100 to compress the filler 210. In practical application, in addition to the above structure, the first matching portion 310 and the second matching portion 120 may be penetrated by a stud, nuts are screwed on the upper and lower ends of the stud, and the two nuts are screwed to make them relatively move close to each other, so as to realize the downward movement of the gland 300; alternatively, the bolt member 330 penetrates the first mating portion 310 and is in threaded engagement with the second mating portion 120, which may be changed according to practical use requirements.

In some embodiments, a dished spring 350 is provided between the nut member 340 and the first mating portion 310 or the second mating portion 120. It can be understood that, as shown in fig. 1, 2 and 5, the nut 340 is located at the lower side of the second mating portion 120, a disc spring 350 is disposed between the nut 340 and the second mating portion 120, and the disc spring 350 is used to absorb vibration and impact energy, so as to reduce the possibility of loosening the nut 340, and thus the nut is convenient to use.

In some embodiments, the first engaging portion 310 or the second engaging portion 120 is provided with a rotation limiting structure capable of limiting rotation of the bolt 330. It can be appreciated that by providing a rotation limiting structure to limit the rotation of the bolt member 330, the bolt member 330 is prevented from being driven to rotate when the nut member 340 is screwed, thereby facilitating the pretension adjustment. In practical application, the rotation limiting structure may also limit the rotation of the nut 340, so that the bolt 330 needs to be rotated to make the bolt 330 and the nut 340 relatively move when the pretension adjustment is performed, and the rotation limiting structure may be set correspondingly according to practical use requirements.

In some embodiments, the rotation limiting structure includes a limiting recess 302 adapted to the head of the bolt 330, and the head of the bolt 330 is clamped in the limiting recess 302.

It can be understood that, as shown in fig. 1, 2 and 3, the rotation limiting structure includes a limiting concave portion 302, the shape of the limiting concave portion 302 is matched with that of the head of the bolt 330, when the head of the bolt 330 is placed in the limiting concave portion 302, the wall portion of the limiting concave portion 302 is abutted with the head of the bolt 330, so as to limit rotation of the bolt 330. In practical application, besides the above structure, the bump may be abutted with the head of the bolt 330 to limit the rotation of the bolt, which may be set according to practical requirements.

In some embodiments, two first engaging portions 310 are provided, the two first engaging portions 310 are respectively located on two opposite sides of the gland 300, and the second engaging portion 120 is provided with two first engaging portions 310 and is distributed corresponding to the two first engaging portions.

It can be understood that, as shown in fig. 2, 3 and 5, the first matching parts 310 are two and are respectively located at the front side and the rear side of the gland 300, the second matching parts 120 are two and are distributed and arranged corresponding to the two first matching parts 310, and the compression of the gland 300 on the packing 210 can be stably realized through the matching of the plurality of first matching parts 310 and the second matching parts 120, and the loosening of the gland 300 is avoided, so that the gland is convenient to use. In practical application, the specific number of the first matching parts 310 and the second matching parts 120 may also be changed according to the practical use requirement.

In some embodiments, the housing 100 is provided with a accommodating recess 102 in which the gland 300 is accommodated, the gland 300 is disposed in the accommodating recess 102, and the first engaging portion 310 extends from the accommodating recess 102.

It can be understood that, as shown in fig. 1, 2 and 4, the upper side of the housing 100 is provided with a accommodating recess 102 below the handle 230, and the gland 300 is disposed at the accommodating recess 102 to avoid interference to rotation of the handle 230, and can facilitate installation and placement of the gland 300, the front and rear sides of the accommodating recess 102 are opened, and two first engaging portions 310 respectively extend from the front and rear sides of the accommodating recess 102, so as to facilitate operation of the screw adjusting structure on the first engaging portions 310, and facilitate use. In practical application, the specific structure of the housing 100 may also be changed according to the actual use requirement, which is not described herein.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (10)

1. An on-line pretightening structure of a ball valve, comprising:

the shell is provided with a middle shaft channel, and an inner flange extending along the radial direction is arranged in the middle shaft channel;

the valve rod penetrates through the center shaft channel, and a filler is arranged between the outer wall of the valve rod and the inner wall of the center shaft channel;

the gland, the gland is equipped with dodges the hole, the valve rod wears to establish dodge the hole and can be relative dodge the hole rotation, the lateral part of gland is equipped with the first cooperation portion of outside extension, the casing corresponds and is equipped with the second cooperation portion, first cooperation portion with be equipped with screw thread adjustment structure between the second cooperation portion, first cooperation portion can pass through screw thread adjustment structure is relative second cooperation portion removes, so that the gland with the inward flange is right the packing forms the clamp.

2. The on-line pretensioning structure of a ball valve according to claim 1, wherein the pressing cover is provided with a pressing portion extending downward, the pressing portion extends into the center shaft passage, and the packing is located between the pressing portion and the inner flange and is provided with a plurality of layers.

3. The ball valve on-line pre-tightening structure according to claim 1, wherein a sealing ring is sleeved on the valve rod, and the sealing ring is located in the center shaft channel and is abutted with the inner flange.

4. The on-line pretensioning structure of a ball valve according to claim 1, wherein the screw thread adjusting structure includes a bolt member and a nut member, the bolt member penetrating through the first fitting portion and the second fitting portion and being screw-fitted with the nut member.

5. The on-line pre-tightening structure of a ball valve according to claim 4, wherein a dished spring is provided between the nut member and the first engagement portion or between the nut member and the second engagement portion.

6. The on-line pre-tightening structure of a ball valve according to claim 4, wherein the first fitting portion or the second fitting portion is provided with a rotation limiting structure capable of limiting rotation of the bolt member.

7. The ball valve of claim 6, wherein the rotation limiting structure comprises a limiting recess adapted to the head of the bolt member, the head of the bolt member being captured in the limiting recess.

8. The ball valve on-line pre-tightening structure according to claim 1, wherein two first matching parts are arranged, the two first matching parts are respectively positioned on two opposite sides of the gland, and the two second matching parts are arranged correspondingly to the two first matching parts.

9. The online pre-tightening structure of the ball valve according to claim 1, wherein the shell is provided with a containing concave position for containing the gland, the gland is arranged in the containing concave position, and the first matching part extends out of the containing concave position.

10. A soft seal floating ball valve comprising an on-line pretension structure of a ball valve according to any one of claims 1 to 9.