CN219082267U - Power station type small-caliber stop valve - Google Patents

Abstract

The utility model discloses a power station type small-caliber stop valve, which comprises a valve body, a valve core and a valve rod, wherein a bracket is arranged at the upper part of the valve body, a bearing seat, a bearing cover and a valve rod nut are arranged on the bracket, and a limit space formed by surrounding the bearing seat and the bearing cover is used for limiting the lower part of the valve rod nut; the bearing seat is provided with a first through hole which allows the upper part of the valve rod to pass through upwards, and the upper part of the valve rod passes through the first through hole to form a rotary matching relationship with the lower part of the valve rod nut; the bearing cover is provided with a second through hole which allows the upper part of the valve rod nut to penetrate upwards, and the upper part of the valve rod nut penetrates out of the second through hole to be fixedly connected with the hand wheel or in driving connection with the electric device; when the stop valve is switched to a hand wheel mode, the upper part of the valve rod nut is fixedly connected with the hand wheel; when the stop valve is switched to the electric mode, the upper part of the valve rod nut is in driving connection with the electric device, and the electric device is located on the bearing cover and is fixedly connected with the bearing cover. The stop valve can facilitate the switching of the stop valve hand wheel and the electric device to the greatest extent.

Description

Power station type small-caliber stop valve

Technical Field

The utility model relates to the technical field of valves, in particular to a small-caliber stop valve of a power station.

Background

The stop valve has the main function of cutting off the medium, has small friction force between sealing surfaces in the opening and closing process, small opening height, simple structure and convenient production, manufacture and maintenance, and is widely used in the field of power station valves, in particular to high-temperature high-pressure steam and water supply medium pipelines. In the field of power station valves, the requirements and the dependence on electric devices are high, and a stop valve, particularly a small-caliber stop valve, has the requirements of a hand wheel stop valve and an electric stop valve, is limited in structural form, and is slightly complicated in hand wheel and electric device switching.

Based on the above situation, the utility model provides a small-caliber stop valve of a power station, which can effectively solve the problems.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a small-caliber stop valve of a power station. The utility model can facilitate the switching between the stop valve hand wheel and the electric device to the greatest extent, and is additionally provided with the valve rod rotation preventing structure, and meanwhile, the utility model also has the function of visualizing valve position indication.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model provides a power station type small-bore stop valve, includes valve body, case and valve rod, the valve body upper portion is provided with the support, be provided with bearing frame, bearing cap and valve rod nut on the support, the spacing space that the bearing frame and the bearing cap surround and form is used for forming spacingly to valve rod nut lower part; the bearing seat is provided with a first through hole allowing the upper part of the valve rod to pass through upwards, and the upper part of the valve rod passes through the first through hole to form a rotary matching relationship with the lower part of the valve rod nut; the bearing cover is provided with a second through hole which allows the upper part of the valve rod nut to pass through upwards, and the upper part of the valve rod nut passes through the second through hole to be fixedly connected with a hand wheel or in driving connection with an electric device; when the stop valve is switched to a hand wheel mode, the upper part of the valve rod nut is fixedly connected with the hand wheel; when the stop valve is switched to an electric mode, the upper part of the valve rod nut is in driving connection with an electric device, and the electric device is located on the bearing cover and is fixedly connected with the bearing cover.

Preferably, when the stop valve is switched to a hand wheel mode, the valve rod nut adopts a multiparty valve rod nut; the multi-side valve rod nut comprises a multi-side valve rod nut body, a connecting thread is arranged at the upper end of the multi-side valve rod nut body, a clamping part with a plurality of vertical faces is arranged on the multi-side valve rod nut body below the connecting thread, a first limiting convex ring is arranged on the multi-side valve rod nut body below the clamping part, and the first limiting convex ring is rotationally connected in the limiting space through a needle bearing.

Preferably, when the shut-off valve is switched to the electric mode, the valve stem nut adopts a claw-type valve stem nut; the claw-type valve rod nut comprises a claw-type valve rod nut body, a claw is arranged at the upper end of the claw-type valve rod nut body, a second limiting convex ring is arranged on the claw-type valve rod nut body below the claw, and the second limiting convex ring is rotationally connected in the limiting space through a needle bearing.

Preferably, the lower part of the valve rod nut is provided with an internal thread, the upper part of the valve rod is provided with an external thread, and a rotary matching relationship can be formed between the external thread and the internal thread.

Further, a reducing is arranged on the valve rod below the external thread, a guide ring is clamped on the reducing, and a sliding fit relationship can be formed between the guide ring and a guide channel at the lower part of the bearing seat.

Further, the guide ring comprises a left half open ring and a right half open ring which are symmetrically arranged, the outer side walls of the two half open rings are inwards sunken to form a mounting groove, a fastener is embedded in the mounting groove, and the two half open rings are mutually close to compress the reducing through the fastener.

Further, a guide pin transversely penetrates through the valve rod below the guide ring, a long slot hole is formed in the guide channel along the lifting direction of the valve rod, and two ends of the guide pin extend out of the long slot hole and can form a sliding fit relation with the long slot hole.

Preferably, the bearing seat is embedded in the top of the support, the bearing cover is arranged on the top of the bearing seat, and the bearing cover is fixedly connected with the support through a fastening assembly so as to tightly press the bearing seat.

Preferably, a sealing assembly is further arranged between the valve rod and the valve body, the sealing assembly comprises a packing pressing plate, a packing pressing sleeve, packing, a graphite ring, packing and a packing seat ring which are sequentially sleeved on the valve rod from top to bottom, the outer end of the packing pressing plate is fixedly connected with the support through a fastening assembly, and the bottom of the packing seat ring is propped against a limiting step on the valve body.

Further, the bottom surface of the packing pressing plate, which is in contact with the packing pressing sleeve, is set to be a spherical surface, the upper surface of the packing pressing sleeve is set to be an inclined surface, and the packing pressing plate is in compression fit with the packing pressing sleeve through the spherical surface and the inclined surface.

Compared with the prior art, the utility model has the following advantages:

1. according to the utility model, the bearing cover is arranged to be detachable, when the hand wheel is required to be switched into the electric stop valve, the bearing cover is only required to be detached, the hexagonal valve rod nut and the hand wheel are replaced by the electric device and the claw valve rod nut, the bearing cover is connected with the electric device through the hexagonal head bolt and the spring washer, and in the same way, the hand wheel mode can be switched again, and the switching is convenient.

2. The packing is arranged on the upper surface and the lower surface of the graphite ring, so that the graphite ring can be effectively prevented from being corroded by high-temperature high-pressure medium, the sealing performance is high, and the graphite ring is suitable for high-temperature high-pressure environments.

3. According to the utility model, the guide ring on the valve rod is arranged as two split half-open rings, the guide ring is not required to be sleeved at the end part of the valve rod, the two half-open rings can be directly spliced and tightly tied at the middle part of the valve rod, and the installation and the disassembly are very convenient.

4. According to the utility model, the guide pin is transversely arranged on the valve rod, the long slot hole allowing the guide pin to slide up and down is arranged on the bearing seat, the valve rod can be prevented from self-transmission under the mutual matching of the guide pin and the long slot hole, meanwhile, the opening of the valve is displayed in real time by identifying the specific position of the guide pin, and the visual valve position indication function is realized.

Drawings

FIG. 1 is a schematic cross-sectional view of a shut-off valve of the present utility model (hand wheel mode);

FIG. 2 is a schematic view of a partial cross-sectional structure (electric mode) of the shutoff valve of the present utility model;

FIG. 3 is a schematic perspective view of a hexagonal stem nut of the shut-off valve of the present utility model;

FIG. 4 is a schematic perspective view of a claw-type valve stem nut of the shut-off valve of the present utility model;

FIG. 5 is a schematic perspective view of a valve stem of the shut-off valve of the present utility model;

FIG. 6 is a schematic perspective view of a bearing cap of the shut-off valve of the present utility model;

FIG. 7 is a schematic cross-sectional view of a bearing housing of a shut-off valve of the present utility model;

FIG. 8 is a schematic perspective view of a bracket of the stop valve of the present utility model;

fig. 9 is a schematic perspective view of a split ring of the shut-off valve of the present utility model.

Reference numerals: 1-a valve body; 2-a valve stem; 21-external threads; 22-reducing; 23-a third through hole; 3-valve core; 4-a bracket; 41-via holes; 42-third internal threads; 43-mounting base; 5-bearing seats; 51-a first through hole; 52-guiding channel; 6-a bearing cap; 61-a second through hole; 7-a valve stem nut; 71-multiparty valve stem nut; 711-multiparty valve stem nut body; 712-connecting threads; 713-a clamping part; 714-a first limit collar; 715-first internal thread; 72-jaw valve stem nut; 721-pawl valve stem nut body; 722-jaws; 723-a second limit collar; 724-second internal threads; 8-needle bearings; 9-a hand wheel; 10-an electric device; 11-a guide ring; 111-half open loop; 112-mounting slots; 113-fasteners; 12-a guide pin; 13-a fastening assembly; 14-a seal assembly; 141-a packing press plate; 142-packing press sleeve; 143-packing; 144-graphite rings; 145-a packing race; 146-limit steps.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present utility model, preferred embodiments of the present utility model will be described below with reference to specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

The utility model is further illustrated with reference to figures 1 to 9 and examples, which are not intended to be limiting.

The utility model provides a power station type small-caliber stop valve, which comprises a valve body 1, a valve core 3 and a valve rod 2, wherein a bracket 4 is arranged at the upper part of the valve body 1, a bearing seat 5, a bearing cover 6 and a valve rod nut 7 are arranged on the bracket 4, and a limit space formed by surrounding the bearing seat 5 and the bearing cover 6 is used for limiting the lower part of the valve rod nut 7; the bearing seat 5 is provided with a first through hole 51 allowing the upper part of the valve rod 2 to pass through upwards, and the upper part of the valve rod 2 passes through the first through hole 51 to form a rotary matching relationship with the lower part of the valve rod nut 7; the bearing cover 6 is provided with a second through hole 61 allowing the upper part of the valve rod nut 7 to penetrate upwards, and the upper part of the valve rod nut 7 penetrates out of the second through hole 61 for fixedly connecting with the hand wheel 9 or driving connection with the electric device 10; when the stop valve is switched to a hand wheel 9 mode, the upper part of the valve rod nut 7 is fixedly connected with the hand wheel 9; when the shut-off valve is switched to the electric mode, the upper part of the valve rod nut 7 is in driving connection with the electric device 10, and the electric device 10 is located on the bearing cap 6 and is fixedly connected with the bearing cap.

As shown in fig. 1, in one embodiment:

when the stop valve is switched to a hand wheel 9 mode, the valve rod nut 7 adopts a multiparty valve rod nut 71; the multiparty valve rod nut 71 comprises a multiparty valve rod nut body 711, a connecting thread 712 is arranged at the upper end of the multiparty valve rod nut body 711, a clamping part 713 with a plurality of vertical faces is arranged on the multiparty valve rod nut body 711 below the connecting thread 712, a first limiting convex ring 714 is arranged on the multiparty valve rod nut body 711 below the clamping part 713, and the first limiting convex ring 714 is rotationally connected in a limiting space through a needle bearing 8.

Specifically, the multiparty valve stem nut 71 is a hexagonal valve stem nut, and the clamping portion 713 has six vertical faces that are matched with the hexagonal hole in the middle of the hand wheel 9. After the clamping part 713 is matched with the hexagonal hole in the middle of the hand wheel 9, the hand wheel 9 is pressed downwards by tightening a nut on the connecting thread 712.

According to the structural design, when the stop valve needs to be switched to the hand wheel 9 mode, the bearing cover 6 is disassembled, the valve rod nut 7 is replaced by a hexagonal valve rod nut, the bearing cover 6 is closed, and the hand wheel 9 is connected.

As shown in fig. 2, in one embodiment:

when the shut-off valve is switched to the electric mode, the stem nut 7 adopts the claw-type stem nut 72; the claw-type valve stem nut 72 comprises a claw-type valve stem nut body 721, a claw 722 is arranged at the upper end of the claw-type valve stem nut body 721, a second limiting convex ring 723 is arranged on the claw-type valve stem nut body 721 below the claw 722, and the second limiting convex ring 723 is rotationally connected in the limiting space through a needle bearing 8.

Specifically, the pawl 722 of the pawl valve stem nut 72 is drivingly connected to the drive end of the electric device 10 for transmitting power to the electric device 10. In addition, a fixing hole is reserved in the bearing cap 6 for fixing the electric device 10 to the bearing cap 6.

As can be seen from the above structural design, when the stop valve needs to be switched to the electric mode, the bearing cap 6 is disassembled, the valve rod nut 7 is replaced by the claw-type valve rod nut 72, the bearing cap 6 is closed again, the claw 722 is connected with the driving end of the electric device 10, the bearing cap 6 is connected with the electric device 10 through the fastening assembly 13, and the fastening assembly 13 adopts a hexagon head bolt and a spring washer.

As shown in fig. 3, 4, 5, in one embodiment:

the lower part of the valve rod nut 7 is provided with an internal thread, the upper part of the valve rod 2 is provided with an external thread 21, and a rotary matching relationship can be formed between the external thread 21 and the internal thread. The method comprises the following steps: the lower part of the multiparty valve stem nut body 711 is provided with a first internal thread 715 for screwing with the external thread 21 of the valve stem 2; the lower portion of the pawl valve stem nut body 721 is provided with a second internal thread 724 for screwing with the external thread 21 of the valve stem 2.

According to the structural design, the valve rod nut 7 is driven to self-convey by starting the electric device 10 and the hand wheel 9, so that the valve rod 2 is driven to spirally lift along the vertical direction, and the valve is opened and closed.

As shown in fig. 1, 5, 9, in one embodiment:

the stem body below the external thread 21 of the valve stem 2 is provided with a reduced diameter 22, the reduced diameter 22 is clamped with a guide ring 11, and the guide ring 11 and a guide channel 52 at the lower part of the bearing seat 5 can form a sliding fit relation.

Specifically, the guide ring 11 includes two symmetrically arranged half-open rings 111, the outer side walls of the two half-open rings 111 are both recessed inwards to form a mounting groove 112, a fastening member 113 is embedded in the mounting groove 112, and the two half-open rings 111 are mutually closed by the fastening member 113 to compress the reducing 22. The guide ring 11 is arranged as two split half-open rings 111, the guide ring 11 is not required to be sleeved at the end part of the valve rod 2, the two half-open rings 111 can be directly spliced and tightly tied at the middle part of the valve rod 2, and the installation and the disassembly are very convenient.

Specifically, a third through hole 23 is transversely formed in the valve rod 2 below the guide ring 11, a guide pin 12 is arranged in the third through hole 23 in a penetrating manner, a long slot hole (not shown in the figure) is formed in the guide channel 52 along the lifting direction of the valve rod 2, and two ends of the guide pin 12 extend out of the long slot hole and can form a sliding fit relationship with the long slot hole. Under the mutual cooperation of the guide pin 12 and the long slot hole, the valve rod 2 can be prevented from self-transmission, and meanwhile, the opening of the valve is displayed in real time by identifying the specific position of the guide pin 12, so that the visual valve position indication function is realized.

As shown in fig. 1, 6, 7, 8, in one embodiment:

the bearing pedestal 5 is embedded at the top of the bracket 4, the bearing cover 6 is arranged at the top of the bearing pedestal 5, and the bearing cover 6 is tightly connected with the bracket 4 through the fastening component 13 so as to tightly press the bearing pedestal 5. The fastener assembly 13 employs a hexagon socket head cap screw.

Specifically, the top of the bracket 4 is provided with a via hole 41, and a bearing seat 5 is arranged in the via hole 41 in a penetrating manner; the lower part of the bracket 4 is provided with a mounting seat 43, and the mounting seat 43 is fixedly connected with the outer end of the packing pressing plate 141 through a fastening component 13; the lower part of the bracket 4 is provided with an internal threaded hole, the internal threaded hole is in matched connection with an external thread 21 on the upper part of the valve body 1, and the fastening assembly 13 on the side of the lower part of the bracket 4 is used for tightening and fixing, and the fastening assembly 13 adopts an anti-rotation screw.

As shown in fig. 1, in one embodiment: a sealing assembly 14 is further arranged between the valve rod 2 and the valve body 1, the sealing assembly 14 comprises a packing pressing plate 141, a packing pressing sleeve 142, packing 143, a graphite ring 144, packing 143 and a packing retainer 145 which are sequentially sleeved on the valve rod 2 from top to bottom, the outer end of the packing pressing plate 141 is fixedly connected with the bracket 4 through a fastening assembly 13, and the bottom of the packing retainer 145 is propped against a limiting step 146 on the valve body 1. The fastening assembly 13 employs a hinge bolt, a hinge nut, and a hinge flat washer. The packing 143 is arranged on the upper surface and the lower surface of the graphite ring 144, so that the graphite ring 144 can be effectively prevented from being corroded by high-temperature high-pressure medium, the sealing performance is high, and the graphite ring is suitable for a high-temperature high-pressure environment. The packing 143 is made of braided packing, and is molded by a molding process, so that the distribution of compression load of the packing can be improved, radial flow can be selectively compressed and controlled, and the packing and the graphite ring can be fully contacted with the valve rod, so that a more reliable and longer sealing effect can be achieved.

Specifically, the bottom surface of the packing pressing plate 141, which is in contact with the packing pressing sleeve 142, is set to be a spherical surface, the upper surface of the packing pressing sleeve 142 is set to be an inclined surface, and the packing pressing plate 141 is in press fit with the packing pressing sleeve 142 through the spherical surface and the inclined surface.

Based on the description of the utility model and the drawings, a power station type small-caliber stop valve of the utility model can be easily manufactured or used by a person skilled in the art, and the positive effects described in the utility model can be produced.

Unless specifically stated otherwise, in the present utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the positional relationship indicated is based on the positional relationship indicated in the drawings, and is merely for convenience of describing the present utility model and simplifying the description, and it is not necessary to indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationship in the present utility model are merely for exemplary illustration and are not to be construed as limitations of the present patent, and it is possible for those skilled in the art to understand the specific meaning of the above terms in conjunction with the drawings and according to circumstances. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

Unless specifically stated or limited otherwise, the terms "disposed," "connected," and "connected" herein are to be construed broadly, e.g., they may be fixed, removable, or integral; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present utility model fall within the scope of the present utility model.

Claims (10)

1. The utility model provides a power station type small-bore stop valve, includes valve body (1), case (3) and valve rod (2), its characterized in that: the valve is characterized in that a support (4) is arranged on the upper portion of the valve body (1), a bearing seat (5), a bearing cover (6) and a valve rod nut (7) are arranged on the support (4), and a limit space formed by surrounding the bearing seat (5) and the bearing cover (6) is used for limiting the lower portion of the valve rod nut (7); the bearing seat (5) is provided with a first through hole (51) which allows the upper part of the valve rod (2) to penetrate upwards, and the upper part of the valve rod (2) penetrates out of the first through hole (51) to form a rotary matching relationship with the lower part of the valve rod nut (7); the bearing cover (6) is provided with a second through hole (61) which allows the upper part of the valve rod nut (7) to penetrate upwards, and the upper part of the valve rod nut (7) penetrates out of the second through hole (61) and is used for being fixedly connected with the hand wheel (9) or in driving connection with the electric device (10); when the stop valve is switched to a hand wheel (9) mode, the upper part of the valve rod nut (7) is fixedly connected with the hand wheel (9); when the stop valve is switched to an electric mode, the upper part of the valve rod nut (7) is in driving connection with the electric device (10), and the electric device (10) is located on the bearing cover (6) and is fixedly connected with the bearing cover.

2. The utility-type small-bore stop valve of claim 1, wherein: when the stop valve is switched to a hand wheel (9) mode, the valve rod nut (7) adopts a multiparty valve rod nut (71); the multi-side valve rod nut (71) comprises a multi-side valve rod nut body (711), a connecting thread (712) is arranged at the upper end of the multi-side valve rod nut body (711), a clamping portion (713) with a plurality of vertical faces is arranged on the multi-side valve rod nut body (711) below the connecting thread (712), a first limiting convex ring (714) is arranged on the multi-side valve rod nut body (711) below the clamping portion (713), and the first limiting convex ring (714) is rotationally connected in the limiting space through a needle bearing (8).

3. The utility-type small-bore stop valve of claim 1, wherein: when the stop valve is switched to an electric mode, the valve rod nut (7) adopts a claw-type valve rod nut (72); the claw-type valve rod nut (72) comprises a claw-type valve rod nut body (721), a claw (722) is arranged at the upper end of the claw-type valve rod nut body (721), a second limiting convex ring (723) is arranged on the claw-type valve rod nut body (721) below the claw (722), and the second limiting convex ring (723) is rotationally connected in the limiting space through a needle bearing (8).

4. The utility-type small-bore stop valve of claim 1, wherein: the lower part of the valve rod nut (7) is provided with an internal thread, the upper part of the valve rod (2) is provided with an external thread (21), and a rotary matching relationship can be formed between the external thread (21) and the internal thread.

5. The utility-type small-bore stop valve of claim 4, wherein: the valve rod (2) below the external thread (21) is provided with a reducing (22), the reducing (22) is clamped with a guide ring (11), and a sliding fit relationship can be formed between the guide ring (11) and a guide channel (52) at the lower part of the bearing seat (5).

6. The utility-type small-bore stop valve of claim 5, wherein: the guide ring (11) comprises left and right half open rings (111) which are symmetrically arranged, the outer side walls of the two half open rings (111) are inwards recessed to form a mounting groove (112), a fastener (113) is embedded in the mounting groove (112), and the two half open rings (111) are mutually close to compress the reducing (22) through the fastener (113).

7. The utility-type small-bore stop valve of claim 5, wherein: the valve rod (2) below the guide ring (11) is transversely penetrated and provided with a guide pin (12), a long slot hole is formed in the guide channel (52) along the lifting direction of the valve rod (2), and two ends of the guide pin (12) extend out of the long slot hole and can form a sliding fit relation with the long slot hole.

8. The utility-type small-bore stop valve of claim 1, wherein: the bearing seat (5) is embedded in the top of the support (4), the bearing cover (6) is arranged on the top of the bearing seat (5), and the bearing cover (6) is tightly connected with the support (4) through a fastening assembly (13) so as to tightly press the bearing seat (5).

9. The utility-type small-bore stop valve of claim 1, wherein: still be provided with seal assembly (14) between valve rod (2) with valve body (1), seal assembly (14) are including from top to bottom overlaps in proper order locating packing clamp plate (141), packing press sleeve (142), packing (143), graphite circle (144), packing (143) and packing seat circle (145) on valve rod (2), packing clamp plate (141) outer end pass through fastening assembly (13) with support (4) fixed connection, packing seat circle (145) bottom with spacing step (146) on valve body (1) offset.

10. The utility-type small-bore stop valve of claim 9, wherein: the bottom surface of the packing pressing plate (141) contacted with the packing pressing sleeve (142) is a spherical surface, the upper surface of the packing pressing sleeve (142) is an inclined surface, and the packing pressing plate (141) is in compression fit with the packing pressing sleeve (142) through the spherical surface and the inclined surface.

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