CN218348023U - Split coupling for connecting hydraulic actuator and valve rod - Google Patents
Split coupling for connecting hydraulic actuator and valve rod Download PDFInfo
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- CN218348023U CN218348023U CN202222885557.0U CN202222885557U CN218348023U CN 218348023 U CN218348023 U CN 218348023U CN 202222885557 U CN202222885557 U CN 202222885557U CN 218348023 U CN218348023 U CN 218348023U
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Abstract
The utility model relates to the technical field of valves, in particular to a split type coupling for connecting a hydraulic actuating mechanism and a valve rod of a valve, which comprises a locking nut and a nut sleeve, wherein the locking nut and the nut sleeve are mutually independent split pieces; the center of the locking nut is axially communicated to form a valve rod connecting hole, and the valve rod connecting hole is provided with an internal thread which is in matched connection with the external thread on the valve rod; the center of the nut sleeve is axially penetrated to form a stepped hole, the stepped hole comprises a sleeve hole sleeved on the locking nut and a through hole for the valve rod to penetrate through, a stepped surface facing the locking nut is formed between the through hole and the sleeve hole, a flange connecting hole axially penetrated through the nut sleeve is formed in the outer peripheral side of the sleeve hole in the nut sleeve, the flange connecting hole is connected with a flange at one end of a piston rod of the hydraulic actuator through a fastener, and the locking nut is tightly pressed on the flange through the stepped surface. The adjusting precision of the stroke amount of the hydraulic actuating mechanism is improved, and the problem of connection looseness caused by fastening bolts on the integrated coupling block can be avoided.
Description
Technical Field
The utility model relates to the technical field of valves, especially, relate to a connect split type shaft coupling of actuating mechanism and valve rod that surges.
Background
In the operation process of the gas turbine, the upper layer controller puts forward the requirement of real-time position opening degree to the valve according to the requirements of load, rotating speed and the like. In order to realize real-time control of the opening of the valve, a hydraulic actuator is generally used to drive the valve to move, so as to realize full opening and full closing of the valve and realize accurate control of the valve at each stroke. Structurally, a hydraulic actuator is usually mounted on the upper portion of the valve, and a connecting structure connected with the valve is arranged at the bottom of the hydraulic actuator and used for being connected with the valve into a whole, so that linkage between the hydraulic actuator and a valve rod of the valve is achieved. The opening and closing of the valve mainly depends on the piston rod of the hydraulic actuator to drive the flange to act, and then the flange drives the connecting piece between the valve rod of the valve and the actuator to act, so that the valve rod is driven to act to realize the opening requirement of each position of the valve.
Therefore, in order to ensure the tight connection between the hydraulic actuating mechanism and the valve rod of the valve and prevent the problems of working dead zone and the like caused by loose matching in the working process of the gas turbine, a connecting piece in tight matching is required to realize the connection between the hydraulic actuating mechanism and the valve rod of the valve. Conventionally, the connection between the two is usually directly realized by using an integrated coupling block. The integrated coupling block has to be the same as the end cover of the hydraulic actuator in size and be tightly matched, and the structural form causes that the adjustment precision of the stroke of the hydraulic actuator is not high.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the to-be-solved technical problem of the utility model is to provide a connect the split type shaft coupling of actuating mechanism and valve rod that surges, can improve the regulation precision of the actuating mechanism stroke volume that surges.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a split type coupling for connecting a hydraulic actuator and a valve rod, which comprises a locking nut and a nut sleeve, wherein the locking nut and the nut sleeve are mutually independent split pieces; the center of the locking nut is axially penetrated to form a valve rod connecting hole, the valve rod connecting hole is provided with an internal thread, and the internal thread of the valve rod connecting hole is matched and connected with the external thread on the valve rod; the center of the nut sleeve is axially communicated to form a stepped hole, the stepped hole comprises a sleeve hole externally sleeved on the locking nut and a through hole for the valve rod to penetrate through, a stepped surface facing the locking nut is formed between the through hole and the sleeve hole, a flange connecting hole axially communicated with the nut sleeve is formed in the outer peripheral side of the sleeve hole in the nut sleeve, the flange connecting hole is connected with a flange at one end of a piston rod of the hydraulic actuator through a fastener, and the locking nut is tightly pressed on the flange through the stepped surface.
Preferably, the periphery side of lock nut has been seted up opening and locking hole, the opening link up lock nut's both ends terminal surface along lock nut's axial, the opening link up the valve rod connecting hole along lock nut's radial and extend to between valve rod connecting hole and lock nut's the periphery side, the locking hole is for being close to the opening and being located the radial through-hole that runs through the opening of lock nut along one end department on lock nut's the periphery side, the locking hole has the internal thread, the internal thread in locking hole and lock bolt's external screw thread fit are connected.
Preferably, the peripheral side of lock nut has seted up on it twists the hole, twists the hole and supplies to twist the instrument and insert in order to twist lock nut.
Preferably, the flange connecting hole is provided with internal threads, the fastening piece is a fastening bolt, and the internal threads of the flange connecting hole are matched and connected with the external threads of the fastening bolt.
Preferably, the flange connecting holes are provided in plurality, and the plurality of flange connecting holes are uniformly distributed along the circumferential direction of the nut sleeve on the outer circumferential side of the sleeve hole.
Compared with the prior art, the utility model discloses the progress that has showing:
the utility model discloses a connect split type shaft coupling of actuating mechanism and valve rod surges, adopt the split type structure that lock nut and nut cover matched with and constitute, be connected with the valve rod through lock nut, the nut cover is connected with the flange, and the nut cover cup joints the zonulae occludens that press fit has realized actuating mechanism and valve rod surges with lock nut, lock nut's valve rod connecting hole adopts screw-thread fit to be connected with the valve rod, can realize connecting actuating mechanism and valve rod surges better, and, through twisting lock nut, can be convenient, adjust the stroke volume of actuating mechanism that surges in each aperture position department of valve accurately, it is high to adjust the precision, and can realize the continuous regulation to the actuating mechanism stroke volume that surges, thereby can realize the accurate control valve aperture of actuating mechanism that surges. Compare the integral type shaft coupling piece among the prior art, the utility model discloses a split type shaft coupling is showing the regulation precision that has improved the actuating mechanism stroke volume that surges, also can avoid the not hard up problem of connection that fastening bolt brought on the integral type shaft coupling piece.
Drawings
Fig. 1 is a schematic sectional view of a split coupling for connecting a hydraulic actuator and a valve rod according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a locking nut in the split type coupling for connecting the hydraulic actuator and the valve rod of the valve of the embodiment of the present invention.
Fig. 3 is a schematic end view of a nut sleeve in the split coupling for connecting the hydraulic actuator and the valve rod of the valve of the present invention.
Fig. 4 isbase:Sub>A schematic sectional view taken alongbase:Sub>A-base:Sub>A in fig. 3.
Wherein the reference numerals are as follows:
1. lock nut
11. Valve rod connecting hole
12. Opening of the container
13. Locking hole
14. Screwing hole
2. Nut sleeve
21. Trepan boring
22. Perforation
23. Step surface
24. Flange connecting hole
25. Fastening piece
3. Hydraulic actuating mechanism
31. Piston rod
32. Flange
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings. These embodiments are provided only for illustrating the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the 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 the like 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 should 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 according to specific situations by those skilled in the art.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 to 4, the present invention relates to an embodiment of a split coupling for connecting a hydraulic actuator and a valve rod. The split type coupling for connecting the hydraulic actuator and the valve rod of the valve comprises a locking nut 1 and a nut sleeve 2, wherein the locking nut 1 and the nut sleeve 2 are mutually independent split parts, and the locking nut 1 and the nut sleeve 2 are matched to form the split type coupling for tightly connecting the hydraulic actuator 3 and the valve rod (not shown in the figure) of the valve to realize linkage of the hydraulic actuator 3 and the valve rod of the valve. The hydraulic actuator 3 is of a conventional structure known to those skilled in the art, the hydraulic actuator 3 includes a piston rod 31 and a flange 32 connected to one end of the piston rod 31, the piston rod 31 moves in the cylinder under the action of hydraulic oil to drive the flange 32 to move synchronously therewith, and the stroke of the piston rod 31 is the stroke of the hydraulic actuator 3.
Referring to fig. 2, the center of the locking nut 1 is axially penetrated to form a valve rod connecting hole 11, the valve rod connecting hole 11 is used for being connected with a valve rod of a valve, the valve rod connecting hole 11 is provided with internal threads, and the internal threads of the valve rod connecting hole 11 are matched and connected with external threads on the valve rod.
Referring to fig. 1, 3 and 4, a stepped hole is formed through the center of the nut sleeve 2 in the axial direction, and the stepped hole includes a sleeve hole 21 and a through hole 22 which are communicated with each other. The nut sleeve 2 is sleeved on the lock nut 1 through the sleeve hole 21, and preferably, the diameter of the sleeve hole 21 is consistent with the outer diameter of the lock nut 1, so that the nut sleeve 2 is tightly sleeved with the lock nut 1. The through hole 22 is connected to the stem connecting hole 11 of the lock nut 1 through which the stem passes. The diameter of the through hole 22 is smaller than that of the trepan bore 21 so that a stepped surface 23 facing the lock nut 1 is formed between the through hole 22 and the trepan bore 21. The nut sleeve 2 is provided with a flange connecting hole 24 which penetrates through the nut sleeve 2 along the axial direction of the nut sleeve 2 on the outer periphery side of the sleeve hole 21, the flange connecting hole 24 is connected with a flange 32 at one end of a piston rod 31 of the hydraulic actuator 3 through a fastener 25, the nut sleeve 2 is connected and fixed with the flange 32 of the hydraulic actuator 3, and the locking nut 1 is pressed on the flange 32 by a step surface 23 of a stepped hole of the nut sleeve 2.
From this, the split type shaft coupling of connecting hydraulic actuator and valve rod of this embodiment, adopt the split type structure that lock nut 1 and nut cover 2 cooperate and constitute, be connected with the valve rod through lock nut 1, nut cover 2 is connected with flange 32, and nut cover 2 cup joints with lock nut 1 and is compressed tightly the cooperation and has realized the zonulae occludens of hydraulic actuator 3 and valve rod, valve rod connecting hole 11 and the valve rod of lock nut 1 adopt screw-thread fit to be connected, can realize connecting hydraulic actuator 3 and valve rod better, and, through screwing lock nut 1, can conveniently, the stroke volume of adjusting hydraulic actuator 3 in each aperture position department of valve accurately, the regulation precision is high, and can realize the continuous regulation to 3 stroke volumes of hydraulic actuator, thereby can realize the accurate control valve aperture of hydraulic actuator 3. Compare the integral type shaft coupling piece among the prior art, the split type shaft coupling of this embodiment is showing the regulation precision that has improved 3 stroke volume of actuating mechanism that surges, also can avoid the not hard up problem of connection that fastening bolt brought on the integral type shaft coupling piece.
In this embodiment, referring to fig. 2, preferably, an opening 12 and a locking hole 13 are formed on an outer peripheral side surface of the lock nut 1, the opening 12 penetrates through end surfaces of both ends of the lock nut 1 in an axial direction of the lock nut 1, and the opening 12 penetrates through the stem attachment hole 11 in a radial direction of the lock nut 1 and extends between the stem attachment hole 11 and the outer peripheral side surface of the lock nut 1, thereby enabling the lock nut 1 and the stem attachment hole 11 to be opened or closed through the opening 12. The one end that opening 12 is located on the periphery side of lock nut 1 is the open end of opening 12, and locking hole 13 is the through-hole that radially runs through opening 12 along lock nut 1 near the open end that leans on opening 12, and locking hole 13 also radially runs through lock nut 1 along lock nut 1 in the opening 12 promptly, and locking bolt (not shown in the figure) is connected to locking hole 13 in, and locking hole 13 has the internal thread, and the internal thread of locking hole 13 is connected with lock bolt's external screw thread fit. After the valve rod is inserted into the valve rod connecting hole 11, the locking bolt is screwed in the locking hole 13, so that the locking nut 1 can tightly hold the valve rod, and the tightness between the valve rod connecting hole 11 of the locking nut 1 and the valve rod threaded connection is ensured.
In this embodiment, referring to fig. 2, preferably, a screwing hole 14 is formed in the outer peripheral side surface of the lock nut 1, and the screwing hole 14 is used for inserting a screwing tool to screw the lock nut 1, so as to facilitate the adjustment of the stroke of the hydraulic actuator 3.
In this embodiment, preferably, the flange connection hole 24 on the nut sleeve 2 has an internal thread, the fastening member 25 is a fastening bolt, the internal thread of the flange connection hole 24 is in fit connection with the external thread of the fastening bolt, the flange 32 of the hydraulic actuator 3 is provided with a bolt hole, and the fastening bolt fastens the flange connection hole 24 on the nut sleeve 2 and the bolt hole on the flange 32, so that the nut sleeve 2 is connected and fixed with the flange 32 of the hydraulic actuator 3, and the locking nut 1 is pressed on the flange 32.
Preferably, the flange coupling holes 24 are provided in plural numbers (e.g., six), and the plural flange coupling holes 24 are uniformly distributed along the circumferential direction of the nut sleeve 2 on the outer circumferential side of the sleeve hole 21. Correspondingly, the flange 32 of the hydraulic actuator 3 is provided with a plurality of bolt holes, and the bolt holes correspond to the flange connecting holes 24 one by one and are connected and fixed by a fastener 25 (fastening bolt).
In this embodiment, the requirements on the machining accuracy of the two parts, namely the locking nut 1 and the nut sleeve 2, are not high. For the locking nut 1, the perpendicularity between the end faces of the two axial ends of the locking nut 1 and the valve rod connecting hole 11 and the coaxiality between the valve rod connecting hole 11 and the peripheral side face of the locking nut 1 are mainly ensured. For the nut sleeve 2, the perpendicularity between the end faces of the two axial ends of the nut sleeve 2 and the stepped holes (the sleeve hole 21 and the through hole 22) and the coaxiality between the stepped holes (the sleeve hole 21 and the through hole 22) and the peripheral side face of the nut sleeve 2 are mainly ensured.
Referring to fig. 1, in the installation of the split type coupling for connecting the hydraulic actuator and the valve stem of this embodiment, one end of the valve stem is first threaded through the through hole 22 of the nut sleeve 2 and then screwed into the stem connecting hole 11 of the locking nut 1, a screwing tool is inserted into the screwing hole 14 of the locking nut 1, the locking nut 1 is screwed by rotating the screwing tool, the connection position of the locking nut 1 at the end of the valve stem is adjusted by the threaded fit of the stem connecting hole 11 and the valve stem, the stroke of the hydraulic actuator 3 is limited to a required stroke amount, then the locking bolt is screwed in the locking hole 13 to enable the locking nut 1 to clasp the valve stem, the locking nut 1 abuts against the flange 32 at one end of the piston rod 31 of the hydraulic actuator 3, and finally the flange connecting hole 24 on the nut sleeve 2 is fastened and connected with the bolt hole on the flange 32 by the fastening member 25 (fastening bolt) to enable the nut sleeve 2 to be connected and fixed with the flange 32, and the locking nut 1 is pressed on the flange 32 by the sleeve hole 21 and the stepped surface 23 of the nut sleeve 2 to fix the locking nut 1. Therefore, the hydraulic actuator 3 is tightly connected with the valve rod of the valve through the locking nut 1 and the nut sleeve 2, the piston rod 31 of the hydraulic actuator 3 drives the flange 32 to synchronously move along with the piston rod when moving in the cylinder body under the action of hydraulic oil, and the flange 32 drives the locking nut 1 and the nut sleeve 2 to move, so that the valve rod is driven to move, and the opening degree of the valve is adjusted.
The split type coupling for connecting the hydraulic actuator and the valve rod of the embodiment has the advantages of small number of parts, simple structure, low requirement on machining precision, convenience in machining, and simplicity in installation, disassembly and maintenance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (5)
1. A split type coupling for connecting a hydraulic actuator and a valve rod of a valve is characterized by comprising a locking nut (1) and a nut sleeve (2), wherein the locking nut (1) and the nut sleeve (2) are mutually independent split pieces;
the center of the locking nut (1) is axially communicated to form a valve rod connecting hole (11), the valve rod connecting hole (11) is provided with an internal thread, and the internal thread of the valve rod connecting hole (11) is in matched connection with the external thread on the valve rod;
the center of the nut sleeve (2) is axially penetrated to form a stepped hole, the stepped hole comprises a sleeve hole (21) which is sleeved on the locking nut (1) and a through hole (22) through which the valve rod penetrates, a stepped surface (23) facing the locking nut (1) is formed between the through hole (22) and the sleeve hole (21), a flange connecting hole (24) which is axially penetrated along the nut sleeve (2) is formed in the outer peripheral side of the sleeve hole (21) on the nut sleeve (2), the flange connecting hole (24) is connected with a flange (32) at one end of a piston rod (31) of the hydraulic actuating mechanism (3) through a fastening piece (25), and the stepped surface (23) is used for pressing the locking nut (1) on the flange (32).
2. The split type coupling for connecting a hydraulic actuator and a valve rod according to claim 1, characterized in that an opening (12) and a locking hole (13) are formed in the peripheral side face of the locking nut (1), the opening (12) penetrates through the end faces of the two ends of the locking nut (1) along the axial direction of the locking nut (1), the opening (12) penetrates through the valve rod connecting hole (11) along the radial direction of the locking nut (1) and extends to the position between the valve rod connecting hole (11) and the peripheral side face of the locking nut (1), the locking hole (13) is close to the position of the opening (12) at one end on the peripheral side face of the locking nut (1) along the radial direction of the locking nut (1) through the through hole of the opening (12), the locking hole (13) is provided with an internal thread, and the internal thread of the locking hole (13) is connected with the external thread of the locking bolt in a matching manner.
3. The split type coupling for connecting a hydraulic actuator and a valve rod according to claim 1, wherein a screwing hole (14) is formed in the peripheral side surface of the locking nut (1), and the screwing hole (14) is used for inserting a screwing tool to screw the locking nut (1).
4. The split coupling for connecting a hydraulic actuator and a valve rod according to claim 1, wherein the flange connecting hole (24) has internal threads, the fastening member (25) is a fastening bolt, and the internal threads of the flange connecting hole (24) are in fit connection with the external threads of the fastening bolt.
5. The split coupling for connecting a hydraulic actuator and a valve rod according to claim 1, wherein the flange connecting holes (24) are provided in plural numbers, and the plural flange connecting holes (24) are uniformly distributed along the circumferential direction of the nut sleeve (2) on the outer circumferential side of the sleeve hole (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222885557.0U CN218348023U (en) | 2022-10-31 | 2022-10-31 | Split coupling for connecting hydraulic actuator and valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222885557.0U CN218348023U (en) | 2022-10-31 | 2022-10-31 | Split coupling for connecting hydraulic actuator and valve rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218348023U true CN218348023U (en) | 2023-01-20 |
Family
ID=84899288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222885557.0U Active CN218348023U (en) | 2022-10-31 | 2022-10-31 | Split coupling for connecting hydraulic actuator and valve rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218348023U (en) |
-
2022
- 2022-10-31 CN CN202222885557.0U patent/CN218348023U/en active Active
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