CN211009976U - Valve switch mechanism for diaphragm valve and diaphragm valve - Google Patents
Valve switch mechanism for diaphragm valve and diaphragm valve Download PDFInfo
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- CN211009976U CN211009976U CN201921763524.0U CN201921763524U CN211009976U CN 211009976 U CN211009976 U CN 211009976U CN 201921763524 U CN201921763524 U CN 201921763524U CN 211009976 U CN211009976 U CN 211009976U
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Abstract
A valve opening and closing mechanism for a diaphragm valve and a diaphragm valve are provided with: the valve rod moves linearly along the length direction of the valve rod to drive the diaphragm to adjust the opening degree of the valve; the valve rod nut is sleeved on the valve rod and driven to rotate, and the valve rod is driven to linearly move along the length direction of the valve rod through a spiral structure; a diaphragm coupled to the valve stem; the valve core is connected with the valve rod and the diaphragm respectively, the valve core is positioned in the valve cover, and a first limiting structure for blocking the valve rod and the valve core from rotating relatively is arranged between the valve core and the valve rod; the technical problem solved by providing the valve switch structure and the diaphragm valve is that the valve rod can rotate along with a driving piece for replacing a valve cover, so that the valve rod cannot move up and down linearly, and the opening degree of the valve cannot be adjusted.
Description
Technical Field
The utility model relates to a valve technical field mainly relates to a valve, particularly, relates to a valve on-off mechanism and diaphragm valve for diaphragm valve.
Background
The diaphragm valve is a stop valve which uses a diaphragm as an opening and closing piece to close a flow passage, cut off fluid and separate an inner cavity of a valve body from an inner cavity of a valve cover. The valve cover of the diaphragm valve is in threaded fit with the valve rod, and the valve rod is driven to move up and down by rotating the hand wheel, so that the diaphragm is switched between a state of closing the fluid channel and a state of opening the fluid channel. The hand wheel drives the valve rod to move up and down in a rotating mode, and when the hand wheel moves down to a certain position, the valve rod pushes the diaphragm to close the fluid channel.
In the diaphragm valve in the prior art, a valve rod is matched with a valve cover through threads, and the valve rod is driven to move up and down by rotating a hand wheel, so that the diaphragm is switched between a state of closing a fluid channel and a state of opening the fluid channel; the hand wheel drives the valve rod to move up and down in a rotating mode, and when the hand wheel moves down to a certain position, the valve rod pushes the diaphragm to close the fluid channel. In the diaphragm valve, when the rotating hand wheel is driven to rotate, the rotating hand wheel drives the valve rod to rotate along the circumferential direction to move up and down so as to regulate the opening degree of the fluid channel. In the prior art, in order to solve the problem that the valve rod needs to rise or fall rotationally, the valve rod is connected with the valve core in a sliding mode through the sliding groove, the valve rod drives the valve core to rotate and move up and down on the premise that the valve rod rotates per se, the other end of the valve core is connected with the diaphragm, and then the valve rod and the valve core drive the diaphragm to be linked together, so that the fluid flow of the valve is controlled. However, in the prior art, since the valve rod is rotationally connected with the valve core through the sliding groove, the valve rod descends to a certain position in the rotating process, and the valve rod pushes the diaphragm to close the fluid channel; at this time, due to the action of the downward rotation of the valve rod, the reaction force exerted by the diaphragm on the valve rod can be converted into the force applied to the valve cover threads, and simultaneously, the valve cover threads also generate the reaction force on the valve rod threads, so that the threads in the existing valve cover and the threads in the valve rod are easily damaged under the repeated action of the force, the damaged threads are not easily repaired, the maintenance cost is high, and the replacement is difficult. The driving piece rotates in situ, the valve rod is driven to move linearly upwards and downwards through the spiral structure, however, the driving piece rotates in situ under the action of external forces such as the driving hand wheel, the valve rod can also rotate along with the driving piece, and the valve rod cannot move upwards and downwards due to the fact that the valve rod rotates in the circumferential direction of the valve rod, and the opening degree of the valve is adjusted.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in that, the valve rod can rotate along with the driving piece that is used for replacing the valve gap, leads to the unable up-and-down motion of realizing of valve rod, the unable problem of adjusting valve opening. Therefore, the utility model provides a valve switching mechanism, include:
the valve rod moves linearly along the length direction of the valve rod to drive the diaphragm to adjust the opening degree of the valve;
the valve rod nut is sleeved on the valve rod and driven to rotate, and the valve rod is driven to linearly move along the length direction of the valve rod through a spiral structure; a diaphragm coupled to the valve stem; the valve core is connected with the valve rod and the diaphragm respectively, the valve core is positioned in the valve cover, and a first limiting structure for blocking the valve rod and the valve core from rotating relatively is arranged between the valve core and the valve rod.
The valve switch mechanism for the diaphragm valve, the first limit structure includes: the limiting groove is arranged on the other of the valve core and the valve rod and is in matched and inserted connection with the limiting boss; the limiting boss is arranged in the radial direction of the valve core.
The diaphragm is provided with a convex part extending towards the valve rod direction, the end part of the valve rod is provided with a connecting piece matched and connected with the convex part, and the connecting piece is detachably arranged at the end part of the valve rod;
the valve rod and the radial direction of the connecting piece are respectively provided with correspondingly arranged jacks, and the limiting boss is a pin shaft inserted into the jack.
The inner ring edge of the valve core is provided with an annular extension part extending towards the valve rod direction, and the limiting groove is arranged on the annular extension part.
The diaphragm is detachably connected with the valve rod, and the valve core is sleeved on the valve rod;
and a second limiting structure for blocking the valve core (5) from rotating along the circumferential direction of the valve rod (1) is arranged between the valve core and the valve cover.
The second limiting structure comprises a guide sliding groove arranged on one of the valve core and the valve cover and a guide sliding block arranged on the other of the valve core and the valve cover and matched with the guide sliding groove in a sliding connection manner; the guide sliding groove is arranged along the length direction of the valve rod.
The number of the guide sliding chutes and the number of the guide sliding blocks which are matched with each other in a sliding manner are at least two, and the guide sliding chutes and the guide sliding blocks are arranged in the circumferential direction of the valve rod.
The guide sliding groove is arranged on the edge of the outer contour of the valve core; the guide sliding block is arranged on the wall of the inner cavity of the valve cover.
The valve opening and closing mechanism further comprises:
the driving piece is connected with the valve stem nut and is used for driving the valve stem nut to rotate;
the third limiting structure is used for blocking the valve rod nut from sliding towards the driving piece or the diaphragm;
the third limit structure comprises: the driving piece through set up on it the through-hole with the grafting is dismantled in the valve stem nut cooperation and is linked to each other, third limit structure includes: a first limit step arranged in the through hole, a first limit bulge arranged at one side of the valve rod nut close to the driving piece and abutted against the first limit step, and/or,
the second limiting step is arranged in the valve cover, and the second limiting bulge is arranged on the valve rod nut, is close to the diaphragm and is abutted against the second limiting step.
10. A diaphragm valve, comprising: the valve opening and closing mechanism of any of the above.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a valve switching mechanism for diaphragm valve, include: the valve rod moves linearly along the length direction of the valve rod to drive the diaphragm to adjust the opening degree of the valve; the valve rod nut is sleeved on the valve rod and driven to rotate, and the valve rod is driven to linearly move along the length direction of the valve rod through a spiral structure; a diaphragm coupled to the valve stem; the valve core is connected with the valve rod and the diaphragm respectively, the valve core is positioned in the valve cover, and a first limiting structure for blocking the valve rod and the valve core from rotating relatively is arranged between the valve core and the valve rod. Through inciting somebody to action in this application valve-stem nut cover is put on the valve rod, the hand wheel drives valve-stem nut original place rotation, because valve rod and valve-stem nut set up for helical structure, thereby valve-stem nut can drive valve rod is along its length direction linear motion. In this way, the valve rod nut can be driven to rotate in situ through the hand wheel, so that the valve rod is driven to push the diaphragm to close and open the fluid channel, the valve rod nut is convenient to replace, and the use and maintenance cost of a user is effectively reduced. Therefore, the problems that in the prior art, the valve rod needs to be matched with threads on the valve cover, the valve rod is driven to move up and down by rotating the hand wheel, when the hand wheel moves down to a certain position, the valve rod pushes the diaphragm to close the fluid channel, the reaction force applied to the valve rod by the diaphragm is converted into the force applied to the valve cover threads, and meanwhile, the valve cover threads generate reaction force on the valve rod threads to cause damage to the threads on the valve cover, but the valve cover is difficult to replace, and the maintenance cost is high and the replacement is difficult are solved. In addition, the valve rod can rotate along with a valve rod nut for replacing a valve cover, so that the valve rod cannot move up and down linearly, and the opening degree of the valve cannot be adjusted. Still be provided with first limit structure in this application, above-mentioned first limit structure sets up the case with between the two of valve rod, in order to restrict the valve rod is rotatory along its circumferential direction. Because the valve core is connected with the diaphragm and cannot rotate, the valve core can effectively prevent the valve rod from rotating along the circumferential direction of the valve rod, so that the valve rod can move up and down under the drive of the valve rod nut to adjust the opening of the valve.
2. The utility model provides a valve switching mechanism for diaphragm valve, a limit structure includes: the limiting groove is arranged on the other of the valve core and the valve rod and is in matched and inserted connection with the limiting boss; the limiting boss is arranged in the radial direction of the valve core, the valve core and the valve rod are matched and spliced through the limiting boss and the limiting groove, the structure can be used for simply and conveniently limiting the valve rod through the valve core, the valve rod can not rotate, the valve core can generate a limiting effect on the valve rod, the rotation of the valve rod is limited, and the valve rod can move linearly up and down under the action of the spiral structure.
3. The utility model provides a valve switch mechanism for diaphragm valve, the diaphragm is provided with a bulge extending towards the valve rod direction, the end part of the valve rod is provided with a connecting piece matched and connected with the bulge, and the connecting piece can be detachably arranged at the end part of the valve rod; the valve rod and the radial direction of the connecting piece are respectively provided with correspondingly arranged jacks, and the limiting boss is a pin shaft inserted into the jack. The valve rod and the connecting piece are respectively provided with corresponding jacks in the radial direction, and the limiting boss is a pin shaft inserted into the jack; the valve rod and the connecting piece can be detachably connected through the pin shaft, so that the effects of simplicity in disassembly and convenience in installation can be achieved, in addition, the pin shaft can be limited by the limiting groove, the valve rod can not rotate, the valve core can limit the valve rod in a limiting effect, the rotation of the valve rod is limited, and the valve rod can vertically move under the action of the spiral structure, so that the effects of reduction of equipment damage and frequent replacement in a later period are achieved.
4. The utility model provides a valve on-off mechanism for diaphragm valve, annular structure the inner ring edge of case is provided with the orientation the annular extension that the valve rod direction extends, spacing recess sets up on the annular extension, through the round pin axle with the annular extension carries on spacingly, because the annular extension internal diameter is shorter to the round pin axle can set up shorter, and then can reach a reduce cost's purpose, in addition the connecting piece and the valve rod tip can directly wrap up in the annular extension, and then can reach the better effect of fixity.
5. The utility model provides a valve switch mechanism for diaphragm valve, spacing recess is U type groove, because spacing recess and the size of a dimension looks adaptation of round pin axle, through the round pin axle with spacing recess fixed to can reach better preventing the rotatory effect of valve rod. And the connection mode of the limiting groove and the pin shaft of the U-shaped structure is simple and convenient to install.
6. The utility model provides a valve switch mechanism for a diaphragm valve, wherein a diaphragm is detachably connected with a valve rod, and a valve core is sleeved on the valve rod; a second limiting structure for blocking the valve core from rotating along the circumferential direction of the valve rod is arranged between the valve core and the valve cover, the valve core is connected with the diaphragm, the valve rod is detachably connected with the diaphragm, and the valve core connected with the diaphragm can not rotate along the circumferential direction of the valve core through the second limiting structure, so that the diaphragm can not rotate, if the diaphragm rotates, the diaphragm can deform, the diaphragm can be damaged to a certain extent for a long time, the cost can be increased, in addition, a gap can be formed between the diaphragm and a sealed fluid channel, and the problems of poor sealing effect and inaccurate flow control of the valve can be caused; or when the diaphragm rotates, the connection position between the diaphragm and the sealed opening is not accurately butted, so that the problems of poor sealing effect and inaccurate flow control are caused.
7. The utility model provides a valve switch mechanism for a diaphragm valve, wherein the second limit structure comprises a guide chute arranged on one of the valve core and the valve cover and a guide slide block arranged on the other of the valve core and the valve cover and matched with the guide chute in a sliding way; the direction spout is followed valve rod length direction sets up, through be provided with the direction spout and with the direction slider that the direction spout cooperation slides and links to each other, just the direction spout is followed valve rod length direction sets up. The guide sliding groove is arranged in the length direction of the valve rod, so that the valve rod is effectively prevented from rotating at a possible position due to the action of external force such as vibration in the up-and-down moving process. Therefore, the valve rod connected with the diaphragm cannot rotate along the circumferential direction of the valve rod, the diaphragm cannot rotate in position effectively, and the diaphragm can move vertically and vertically to effectively prevent the diaphragm from rotating. The problems of poor sealing effect and inaccurate flow control of the valve caused by the fact that the diaphragm deforms when the diaphragm rotates and a gap is formed between the diaphragm and a sealed fluid channel are solved; or when the diaphragm rotates, the connection position between the diaphragm and the sealed opening is not accurately butted, so that the problems of poor sealing effect and inaccurate flow control are caused.
8. The utility model provides a valve switch mechanism for diaphragm valve, the cooperation is slided and is linked to each other the direction spout with the direction slider is at least two, arranges on the circumferential direction of valve rod. The purpose of good guiding effect can be achieved by the matched sliding of the guide sliding groove and the guide sliding block in the length direction of the guide sliding block, and in addition, the valve core and the valve cover can be stressed more uniformly and the effect of blocking the rotation of the valve core is better by at least two guide sliding grooves and two guide sliding blocks.
9. The utility model provides a valve switch mechanism for diaphragm valve, be provided with on the case and be used for consolidating the direction spout is in order to prevent the spacing muscle of direction spout deformation through setting up spacing muscle, can make the valve gap prevents the rotatory in-process of case, the case can be more firm, reliable, prevents the direction spout takes place to deform.
10. The utility model provides a valve switch mechanism for a diaphragm valve, wherein the length of a guide chute is less than that of a guide slide block; in the opening or closing state of the valve, the guide sliding grooves are completely embedded on the guide sliding blocks, the length of the guide sliding grooves is smaller than that of the guide sliding blocks, in the opening or closing state of the valve, the guide sliding grooves are completely embedded on the guide sliding blocks, so that the guide sliding blocks and the guide sliding grooves cannot be separated, and the valve rod is stably and reliably positioned in the circumferential direction through the limiting structure no matter the guide sliding grooves are completely embedded in the guide sliding blocks at any time, so that the valve rod is prevented from rotating in the circumferential direction.
11. The utility model provides a valve switch mechanism for diaphragm valve, which also comprises a third limit structure for blocking the sliding of the valve rod nut towards the driving piece or the diaphragm; the valve rod nut is driven to rotate in situ by the driving piece, the valve rod nut drives the valve rod to move up and down by driving the spiral structure, the other end of the valve rod is connected with the diaphragm, so that the diaphragm can be driven to further seal and open a fluid channel, and the valve rod nut can be prevented from shifting in the rotating process by the third limiting structure, so that the valve rod nut is prevented from shifting out of the valve due to the effect of limiting the position.
12. The utility model provides a valve switching mechanism for diaphragm valve, third limit structure includes: the driving piece through set up on it the through-hole with the grafting is dismantled in the valve stem nut cooperation and is linked to each other, third limit structure includes: the valve rod nut is arranged on one side of the valve rod nut, which is close to the driving piece, and the first limiting bulge is abutted against the first limiting step, and/or the second limiting step is arranged in the valve cover, and the second limiting bulge is abutted against the second limiting step. Wherein first spacing arch be the retaining ring, the retaining ring butt be in first spacing step on, through first spacing step with first spacing arch, can prevent valve-stem nut, at rotatory in-process whereabouts to play a fastening, the effect of maintenance, above-mentioned retaining ring more importantly has the advantage of dismantling conveniently, convenience of customers dismouting valve-stem nut and valve rod. In addition, the valve cover is provided with a second limiting step and a second limiting bulge abutted against the second limiting step, so that the valve rod nut can be fastened, and the valve rod nut can be conveniently detached from the lower end of the valve cover, and the purpose of convenience in detachment is achieved.
13. The utility model provides a valve switching mechanism for diaphragm valve, first spacing arch is put for the cover retaining ring on the valve-stem nut, the last be provided with of valve-stem nut with the annular storage tank of its inner ring cooperation joint of retaining ring. Through the matching of the retaining ring and the inner ring of the annular containing groove on the valve rod nut, the purpose that the retaining ring is clamped and fixed with the inner ring of the annular containing groove can be achieved, and the retaining ring is prevented from sliding up and down with the valve rod nut.
14. The check ring is an elastic check ring provided with an opening, and the opening position of the check ring is provided with a mounting hole for changing the inner diameter of the check ring. The check ring is an elastic check ring with an opening, the check ring can be sleeved on the valve rod nut in the opening direction, in addition, a mounting hole for changing the inner diameter of the check ring is formed in the opening direction, a tool called a clamping and embedding tool is used for mounting, two tentacles on the clamping and embedding tool are respectively inserted into the mounting hole, the check ring is opened through operating calipers so as to be clamped into the groove, and the effect of facilitating the mounting of the check ring is achieved.
15. The utility model provides a diaphragm valve, include: the valve opening and closing mechanism drives the valve rod nut to rotate through the rotating hand wheel in the diaphragm valve, and further drives the valve rod to push the diaphragm to close and open the fluid channel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a valve opening and closing mechanism assembly state provided by the present invention;
FIG. 2 is a full sectional view of the valve opening and closing mechanism provided by the present invention;
fig. 3 is a schematic view of a three-dimensional structure of a driving member of the valve opening and closing mechanism provided by the present invention;
fig. 4 is a schematic view of a three-dimensional structure of a valve stem nut of the valve opening and closing mechanism provided by the utility model;
fig. 5 is a schematic view of a three-dimensional structure of a check ring of the valve opening and closing mechanism provided by the utility model;
fig. 6 is a schematic view of a three-dimensional structure of a valve cover of the valve opening and closing mechanism provided by the present invention;
description of reference numerals:
1-a valve stem; 2-valve cover; 3-valve stem nut; 4-a drive member; 5-valve core; 6-through holes; 7-a guide chute; 8-a guide slide block; 9-a membrane; 10-a first limit step; 11-a first limit projection; 12-an annular accommodating groove; 13-opening; 14-mounting holes; 17-a limit boss; 18-a limiting groove; 20-a projection; 21-a connector; 22-a second limit step; 23-a second stop lug; 24-annular extension.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
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 in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The utility model provides a diaphragm valve, as shown in figure 1, include: according to the valve opening and closing mechanism, the rotating hand wheel in the diaphragm valve drives the valve rod nut 3 to rotate, and then the valve rod 1 is driven to push the diaphragm 9 to close and open the fluid channel, wherein the diaphragm 9 preferably uses an elastic diaphragm.
Further, there is described a valve opening and closing mechanism, as shown in fig. 2 and 4, including: the valve rod 1 moves linearly along the length direction of the valve rod to drive the diaphragm 9 to adjust the opening degree of the valve; the valve rod nut 3 is sleeved on the valve rod 1 and is driven to rotate, and the valve rod 1 is driven to linearly move along the length direction of the valve rod through a spiral structure; a diaphragm 9, wherein the diaphragm 9 is connected with the valve rod 1; the valve core 5 is connected with the valve rod 1 and the diaphragm 9 respectively, the valve core 5 is positioned in the valve cover 2, and a first limiting structure for blocking the valve rod 1 and the valve core 5 to rotate relatively is arranged between the valve core 5 and the valve rod 1. The valve rod nut is sleeved on the valve rod, the hand wheel drives the valve rod nut to rotate in place, and the valve rod nut are arranged in a spiral structure, so that the valve rod nut can drive the valve rod to linearly move along the length direction of the valve rod nut. In this way, the valve rod nut can be driven to rotate in situ through the hand wheel, so that the valve rod is driven to push the diaphragm to close and open the fluid channel, the valve rod nut is convenient to replace, and the use and maintenance cost of a user is effectively reduced. Therefore, the problems that in the prior art, the valve rod needs to be matched with threads on the valve cover, the valve rod is driven to move up and down by rotating the hand wheel, when the hand wheel moves down to a certain position, the valve rod pushes the diaphragm to close the fluid channel, the reaction force applied to the valve rod by the diaphragm is converted into the force applied to the valve cover threads, and meanwhile, the valve cover threads generate reaction force on the valve rod threads to cause damage to the threads on the valve cover, but the valve cover is difficult to replace, and the maintenance cost is high and the replacement is difficult are solved. In addition, the valve rod can rotate along with a valve rod nut for replacing a valve cover, so that the valve rod cannot move up and down linearly, and the opening degree of the valve cannot be adjusted. The valve core is characterized in that a first limiting structure is further arranged in the valve core 5, the valve rod 1 is arranged between the valve core and the valve rod 1, and therefore the valve rod 1 is limited to rotate along the circumferential direction of the valve rod 1. Because the valve core 5 is connected with the membrane 9 and can not rotate, the valve core 5 can effectively prevent the valve rod 1 from rotating along the circumferential direction of the valve rod 1, so that the valve rod 1 can move up and down under the driving of the valve rod nut to adjust the opening of the valve. First limit structure includes: the valve core is characterized by comprising a limiting boss 17 arranged on one of the valve core 5 and the valve rod 1 and a limiting groove 18 arranged on the other of the valve core 5 and the valve rod 1 and matched and spliced with the limiting boss 17; the limiting boss 17 is arranged in the radial direction of the valve core 5, the valve core 5 and the valve rod 1 are matched and spliced through the limiting boss 17 and the limiting groove 18, the valve rod 1 can be limited through the valve core 5 by the structure simply and conveniently, the valve rod 1 can be further enabled not to rotate, the valve core 5 can further limit the valve rod 1, the valve rod 1 is limited by the limit effect, the rotation of the valve rod 1 is limited, and the valve rod can move linearly up and down under the action of a spiral structure. The diaphragm 9 is provided with a convex part 20 extending towards the direction of the valve rod 1, the end part of the valve rod 1 is provided with a connecting piece 21 matched and connected with the convex part 20, and the connecting piece 21 is detachably arranged at the end part of the valve rod 1; the valve rod 1 and the connecting piece 21 are respectively provided with corresponding jacks in the radial direction, and the limiting boss 17 is a pin shaft inserted into the jack. The valve rod 1 and the connecting piece 21 are respectively provided with corresponding jacks in the radial direction, and the limiting boss 17 is a pin shaft inserted into the jack; the valve rod 1 and the connecting piece can be detachably connected through the pin shaft, so that the effects of simplicity in detachment and convenience in installation can be achieved, in addition, the pin shaft can be limited by the limiting groove 18, the valve rod 1 can not rotate, the valve core 5 can limit the valve rod 1 to limit the rotation of the valve rod 1, and under the effect of the spiral structure, the valve core can move up and down linearly, so that the effects of reduction of equipment damage and frequent replacement in later periods are achieved.
In addition, as shown in fig. 1, an annular extension portion 24 extending towards the valve rod 1 direction is arranged on the edge of an inner ring of the valve core 5 with an annular structure, the limiting groove 18 is arranged on the annular extension portion 24 and is limited by a pin shaft and the annular extension portion 24, the pin shaft can be arranged to be short due to the short inner diameter of the annular extension portion 24, and therefore the purpose of reducing cost can be achieved, and in addition, the connecting piece and the end portion of the valve rod 1 can be directly wrapped in the annular extension portion 24, and therefore a good fixing effect can be achieved; the limiting groove 18 is a U-shaped groove, and the limiting groove 18 is matched with the pin shaft in size, so that the limiting groove 18 is fixed by the pin shaft, and the effect of better preventing the valve rod from rotating can be achieved. And the connection mode of the limiting groove 18 and the pin shaft of the U-shaped structure is simple and convenient to install.
In addition, as shown in fig. 6, the diaphragm 9 is detachably connected with the valve rod 1, and the valve core 5 is sleeved on the valve rod 1; a second limiting structure for blocking the valve core 5 from rotating along the circumferential direction of the valve rod 1 is arranged between the valve core 5 and the valve cover 2, the valve core 5 is connected with the diaphragm, the valve rod 1 is detachably connected with the diaphragm 9, and the valve core 5 connected with the diaphragm 9 is ensured not to rotate along the circumferential direction through the second limiting structure, so that the diaphragm 9 can be effectively ensured not to rotate, if the diaphragm 9 rotates, the diaphragm 9 deforms, so that the diaphragm can be damaged to a certain extent for a long time, the cost can be increased, in addition, a gap can be formed between the diaphragm 9 and a sealed fluid channel, and the problems of poor valve sealing effect and inaccurate flow control can be caused; or when the diaphragm 9 rotates, the connection position of the diaphragm 9 and the sealed opening is not accurately butted, so that the problems of poor sealing effect and inaccurate flow control are caused, and the second limiting structure comprises a guide sliding groove 7 arranged on one of the valve core 5 and the valve cover 2 and a guide sliding block 8 arranged on the other of the valve core 5 and the valve cover 2 and matched with the guide sliding groove 7 for sliding connection; the direction spout 7 is followed 1 length direction of valve rod sets up, through be provided with the direction spout 7 and with the direction slider 8 that the cooperation of direction spout 7 slides and links to each other, just the direction spout 7 is followed 1 length direction of valve rod sets up. The guide sliding groove 7 is arranged in the length direction of the valve rod 1, and the valve rod 1 is effectively prevented from rotating at a possible position due to external force action such as vibration in the up-and-down moving process. Therefore, the valve rod 1 connected with the diaphragm 9 cannot rotate along the circumferential direction, the diaphragm 9 cannot rotate effectively, and the diaphragm 9 can move vertically and downwards to effectively prevent the diaphragm 9 from rotating. The problems of poor valve sealing effect and inaccurate flow control caused by the fact that the diaphragm 9 deforms when the diaphragm 9 rotates, and a gap is formed between the diaphragm 9 and a sealed fluid channel are solved; or, when the diaphragm 9 rotates, the connection position of the diaphragm 9 and the sealed opening is not accurately butted, which results in the problems of poor sealing effect and inaccurate flow control, wherein at least two guide chutes 7 and at least two guide sliders 8 which are matched and connected in a sliding manner are arranged in the circumferential direction of the valve rod 1. Through the guide chute 7 with the direction of direction slider 8 is in the cooperation of direction slider 8 length direction slides, can reach the effectual purpose of direction, in addition through the direction spout 7 with the direction slider 8 sets up to be two at least, can make case 5 with valve gap 2 atress is more even, blocks that the effect of case 5 rotation is better.
In addition, the valve core 5 is provided with a limiting rib for reinforcing the guide chute 7 to prevent the guide chute 7 from deforming, and the limiting rib is arranged, so that the valve core 5 can be firmer and more reliable to prevent the guide chute 7 from deforming in the process of preventing the valve core 5 from rotating by the valve cover 2, and the length of the guide chute 7 is smaller than that of the guide slider 8; in the open or close state of the valve, the guide sliding groove 7 is completely embedded on the guide sliding block 8, the length of the guide sliding groove 7 is smaller than that of the guide sliding block 8, and in the open or close state of the valve, the guide sliding groove 7 is completely embedded on the guide sliding block 8, so that the guide sliding block 8 and the guide sliding groove 7 cannot be separated from each other, and the valve rod 1 is stably and reliably positioned in the circumferential direction through the limiting structure no matter the guide sliding groove 7 is completely embedded in the guide sliding block 8 at any time, and the valve rod 1 is prevented from rotating in the circumferential direction.
In addition, as shown in fig. 3, 4 and 5, the valve opening and closing mechanism further includes a third limiting structure for blocking the valve stem nut 3 from sliding towards the driving member 4 or the diaphragm 9; the valve rod nut 3 is driven to rotate in situ through the driving piece 4, the valve rod nut 3 drives the valve rod 1 to move up and down through the driving spiral structure, the other end of the valve rod 1 is connected with the diaphragm 9, so that the diaphragm 9 can be driven to further seal and open a fluid channel, the valve rod nut 3 can be prevented from shifting in the rotating process through the third limiting structure, the effect of limiting the position is achieved on the valve rod nut 3, and the valve rod nut 3 is prevented from moving out of the valve. The third limit structure comprises: the driving piece 4 through set up on it through-hole 6 with the grafting is dismantled in the cooperation of valve-stem nut 3, third limit structure includes: the valve rod nut comprises a first limiting step 10 arranged in the through hole 6, a first limiting bulge 11 arranged on one side, close to the driving piece 4, of the valve rod nut 3 and abutted to the first limiting step 10, and/or a second limiting step 22 arranged in the valve cover 2, and a second limiting bulge 23 arranged on the valve rod nut 3 and close to the diaphragm 9 and abutted to the second limiting step 22. Wherein first spacing arch 11 be the retaining ring, the retaining ring butt is in first spacing step 10 on, through first spacing step 10 with first spacing arch 11, can prevent valve-stem nut 3, at rotatory in-process whereabouts to play a fastening, the effect of maintenance, more importantly above-mentioned retaining ring has the convenient advantage of dismantlement, convenience of customers dismouting valve-stem nut 3 and valve rod 1. In addition, through valve gap 2 set up the spacing step 22 of second, and with the spacing arch 23 of second of the spacing step 22 looks butt of second, can play a fastening position's effect to valve-stem nut 3, in addition also conveniently will valve-stem nut 3 follows the lower extreme of valve gap 2 is dismantled out, has played a convenient to detach's purpose, wherein first spacing arch 11 is put for the cover retaining ring on the valve-stem nut 3, be provided with on the valve-stem nut 3 with the annular storage tank 12 of its inner ring cooperation joint of retaining ring. Cooperate through the annular storage tank 12 inner ring on retaining ring and the valve-stem nut 3, can reach the retaining ring with the fixed purpose of annular storage tank 12 inner ring joint, prevent the retaining ring with valve-stem nut 3 go on sliding from top to bottom, the retaining ring is for being provided with opening 13's circlip, its opening 13 position of retaining ring is provided with and is used for changing the mounting hole 14 of retaining ring internal diameter. The check ring is an elastic check ring with an opening 13, the check ring can be sleeved on the valve rod nut 3 in the opening direction, in addition, a mounting hole 14 for changing the inner diameter of the check ring is arranged in the opening direction, a tool called a clamping and embedding tool is used for mounting, two tentacles on the clamping and embedding tool are respectively inserted into the mounting hole 14, the check ring is opened by operating calipers so as to be clamped into the groove, and the effect of facilitating the mounting of the check ring is achieved.
Of course, the utility model discloses it is right diaphragm 9 does not specifically limit, but can realize that the valve is opened and is closed by hard material, for example stainless steel's diaphragm 9.
Certainly, the utility model discloses it is right 1 tip of valve rod with the connected mode of diaphragm 9 does not do specifically and restricts, still can be for 1 tip of valve rod with the connecting piece is integrated into one piece structure, can realize valve rod 1 with 9 link to each other can.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. A valve opening and closing mechanism for a diaphragm valve, comprising:
the valve rod (1) moves linearly along the length direction of the valve rod to drive the diaphragm (9) to adjust the opening degree of the valve;
the valve rod nut (3) is sleeved on the valve rod (1) and is driven to rotate, and the valve rod (1) is driven to linearly move along the length direction of the valve rod through a spiral structure;
a diaphragm (9), wherein the diaphragm (9) is connected with the valve rod (1);
the valve core (5), the valve core (5) respectively with the valve rod (1) with diaphragm (9) link to each other, valve core (5) are located valve gap (2), and be provided with between the two of valve core (5) and valve rod (1) and block valve rod (1) and valve core (5) relative pivoted first limit structure.
2. The valve opening and closing mechanism for a diaphragm valve of claim 1, wherein the first limit structure comprises: the limiting device comprises a limiting boss (17) arranged on one of the valve core (5) and the valve rod (1), and a limiting groove (18) arranged on the other of the valve core (5) and the valve rod (1) and matched and inserted with the limiting boss (17); the limiting boss (17) is arranged in the radial direction of the valve core (5).
3. The valve opening and closing mechanism for a diaphragm valve according to claim 2, wherein a protrusion (20) extending toward the valve stem (1) is provided on the diaphragm (9), a connecting member (21) connected with the protrusion (20) is provided at the end of the valve stem (1), and the connecting member (21) is detachably provided at the end of the valve stem (1);
the valve rod (1) and the connecting piece (21) are respectively provided with corresponding jacks in the radial direction, and the limiting boss (17) is a pin shaft inserted into the jacks.
4. A valve opening and closing mechanism for a diaphragm valve according to claim 3, wherein the inner circumferential edge of said valve body (5) of annular structure is provided with an annular extension (24) extending toward the valve stem (1), and said limit groove (18) is provided on said annular extension (24).
5. The valve opening and closing mechanism for a diaphragm valve according to any one of claims 1 to 4, wherein the diaphragm (9) is detachably connected to the valve stem (1), and the valve core (5) is sleeved on the valve stem (1);
and a second limiting structure for blocking the valve core (5) from rotating along the circumferential direction of the valve rod (1) is arranged between the valve core (5) and the valve cover (2).
6. The valve opening and closing mechanism for the diaphragm valve according to claim 5, wherein the second limit structure comprises a guide sliding groove (7) provided on one of the valve core (5) and the valve cover (2), and a guide slider (8) provided on the other of the valve core (5) and the valve cover (2) and in fit sliding connection with the guide sliding groove (7); the guide sliding groove (7) is arranged along the length direction of the valve rod (1).
7. The valve opening and closing mechanism for a diaphragm valve according to claim 6, wherein at least two of the guide slide groove (7) and the guide slider (8) which are slidably engaged with each other are arranged in a circumferential direction of the valve stem (1).
8. The valve opening and closing mechanism for a diaphragm valve according to claim 7, wherein the guide runner (7) is provided at an outer contour edge of the spool (5); the guide sliding block (8) is arranged on the inner cavity wall of the valve cover (2).
9. The valve opening and closing mechanism for a diaphragm valve of claim 1, further comprising:
the driving piece (4) is connected with the valve rod nut (3) and is used for driving the valve rod nut (3) to rotate;
the third limiting structure is used for blocking the valve rod nut (3) from sliding towards the driving piece (4) or the diaphragm (9);
the third limit structure comprises: driving piece (4) through set up through-hole (6) on it with valve-stem nut (3) cooperation can be dismantled the grafting and link to each other, third limit structure includes: a first limit step (10) arranged in the through hole (6), and a first limit bulge (11) which is arranged at one side of the valve rod nut (3) close to the driving piece (4) and is abutted against the first limit step (10), and/or,
the valve rod nut (3) is provided with a second limit step (22) arranged in the valve cover (2) and a second limit bulge (23) which is arranged on the valve rod nut (3) and is close to the diaphragm (9) and is abutted to the second limit step (22).
10. A diaphragm valve, comprising: the valve opening and closing mechanism of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921763524.0U CN211009976U (en) | 2019-10-18 | 2019-10-18 | Valve switch mechanism for diaphragm valve and diaphragm valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921763524.0U CN211009976U (en) | 2019-10-18 | 2019-10-18 | Valve switch mechanism for diaphragm valve and diaphragm valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211009976U true CN211009976U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921763524.0U Active CN211009976U (en) | 2019-10-18 | 2019-10-18 | Valve switch mechanism for diaphragm valve and diaphragm valve |
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| Country | Link |
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| CN (1) | CN211009976U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110192A (en) * | 2021-11-01 | 2022-03-01 | 北京航天石化技术装备工程有限公司 | Device and method for quickly switching blind plates under fireproof working conditions |
-
2019
- 2019-10-18 CN CN201921763524.0U patent/CN211009976U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110192A (en) * | 2021-11-01 | 2022-03-01 | 北京航天石化技术装备工程有限公司 | Device and method for quickly switching blind plates under fireproof working conditions |
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