CN213616068U - Flexible clamping structure for grinding valve seat - Google Patents
Flexible clamping structure for grinding valve seat Download PDFInfo
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- CN213616068U CN213616068U CN202022454923.8U CN202022454923U CN213616068U CN 213616068 U CN213616068 U CN 213616068U CN 202022454923 U CN202022454923 U CN 202022454923U CN 213616068 U CN213616068 U CN 213616068U
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- clamping structure
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Abstract
The utility model relates to a disk seat grinds centre gripping equipment field discloses a flexible clamping structure is ground to disk seat, including chuck seat, grinding frock and transmission shaft, grind the frock with chuck seat fixed connection, the transmission shaft with be connected with universal joint between the chuck seat. The utility model discloses make the disk seat can deflection angle when can making disk seat and ball core carry out the running-in to make the disk seat can be more smooth laminate with the ball core.
Description
Technical Field
The utility model relates to a centre gripping equipment field is ground to the disk seat, concretely relates to flexible clamping structure is ground to disk seat.
Background
The valve is a main control execution mechanism for medium circulation of the pipeline, and the medium in the pipeline can be adjusted, cut off and the like through the valve. The ball valve can reach VI level or zero leakage as the leakage level of the pipeline cut-off valve, and the hard sealing ball valve is subjected to hard alloy spraying or spray welding hardening treatment on the surface of the ball core and the sealing surface of the valve seat, so that the service life of the valve is prolonged in the environments of corrosion resistance, scouring resistance, wear resistance, high temperature and high pressure, and the hard sealing ball valve can be used in the environment with severe working conditions, and is widely applied to the fields of petroleum, chemical industry, metallurgy, power plants, coal chemical industry and the like.
The valve core is used as the most key part for sealing the ball valve, and two sealing pairs consisting of one ball core and two valve seats play a role in blocking media. Therefore, the machining precision, form and position tolerance and roughness of the ball core and the valve seat determine the sealing performance. Therefore, after finishing the common hard seal ball valve, the ball core and the valve seat are required to be matched and ground so as to ensure the joint of the sealing surface of the ball core and the valve seat.
Before grinding the ball core and the valve seat, the two valve seats and the ball core need to be mutually attached, however, the rotation center of the valve seat and the center of the ball core cannot be completely overlapped to generate eccentricity, so that the valve seat can be smoothly attached to the ball core, the attaching degree of the valve seat and the ball core is improved, a certain deflection angle can be generated in the attaching process of the two valve seats and the ball core, and the two valve seats swing, so that the ball core can smoothly enter the end face of the valve seat to be attached to the valve seat, a flexible connection mode needs to be adopted when the ball core and the valve seat are matched and ground, and a connection structure with a certain deflection angle and swing can be generated.
SUMMERY OF THE UTILITY MODEL
The utility model provides a flexible clamping structure is ground to disk seat makes the disk seat angle of deflection when aiming at making disk seat and ball core carry out the lapping to make the disk seat can be more smooth laminate with the ball core.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the flexible clamping structure for grinding the valve seat comprises a chuck seat, a grinding tool and a transmission shaft, wherein the grinding tool is fixedly connected with the chuck seat, and the transmission shaft is connected with a universal coupling between the chuck seats.
The principle and the advantages of the scheme are as follows: because the ball core is globular, when disk seat and ball core lapping surface laminating, the center between them can not coincide completely, lead to the disk seat can not directly laminate with ball core lapping surface, if directly make disk seat and ball core lapping surface laminating, make the ball core produce rigid contact and produce the friction and cause wearing and tearing to ball core or disk seat when getting into the lapping surface of disk seat easily, influence the grinding precision, and be connected through universal coupling between transmission shaft and the chuck seat among this technical scheme, thereby make the grinding frock and the disk seat of being connected with the chuck seat can produce the slope and deflect certain angle, consequently flexible clamping structure can make disk seat deflection angle among this technical scheme, make the smooth laminating mutually with the ball core of disk seat, avoid disk seat and ball core rigid contact.
Can transmit the moment of torsion for universal joint through the transmission shaft among this technical scheme, universal joint transmits the moment of torsion for the disk seat again, makes the disk seat can the rotation, simultaneously because universal joint itself can rotate to produce the swing when can making disk seat and ball core contact, and laminate gradually with the ball core, make the center of disk seat can coincide with the center of ball core simultaneously, avoid producing off-centre because of disk seat center and ball core center can not coincide completely, lead to grinding failure.
The structure that carries out the centre gripping to the disk seat among this technical scheme is flexible connection structure (can produce the connection structure that deflects, swing) to make the disk seat can produce the swing when cooperating with the ball core, make the disk seat can be smooth laminate with the ball core abrasive surface, and avoid making the surface between them produce wearing and tearing to ball core and disk seat rigid contact.
Preferably, as an improvement, the transmission shaft is coaxially and rotatably connected with a clamping mechanism base, and a spring is arranged between the clamping mechanism base and the chuck seat.
According to the arrangement, the spring can provide a certain pre-pressure during grinding, so that the valve seat provides grinding pressure for the ball core, a certain grinding amount is ensured, and the normal grinding is ensured.
Preferably, as an improvement, a spring seat is arranged between the chuck seat and the clamping mechanism base, the spring seat is rotatably connected with the transmission shaft, and two ends of the spring are respectively connected with the spring seat and the clamping mechanism base.
When the valve seat is contacted with the ball core by moving the clamping structure in the technical scheme, the ball core generates extrusion force on the valve seat to enable the transmission shaft to move in the direction away from the ball core, the spring seat rotationally connected to the transmission shaft moves backwards due to the backward movement of the transmission shaft, the spring is compressed at the moment, the reaction force generated by the compression of the spring acts on the valve seat to form pre-pressure, and the magnitude of the pre-pressure is determined by the compression amount of the spring.
Preferably, as an improvement, the spring holder includes uide bushing and the connecting plate of coaxial setting, the external diameter of connecting plate is greater than the external diameter of uide bushing, the both ends of spring are connected with the uide bushing and the fixture base of spring holder respectively.
The setting of the uide bushing on the spring holder among this technical scheme is convenient more to be connected with the spring, and the uide bushing can play the effect of support and direction to the spring, guarantees the spring more steady in the process of compression and reseing, and the setting of connecting plate can play spacing effect to the spring.
Preferably, as an improvement, a limit ring is coaxially connected to the connecting plate of the spring seat.
The setting of connecting plate is convenient for realize the installation with the spacing ring among this technical scheme, and the purpose of spacing ring is the inclination of restriction universal joint when no-load, avoids valve seat to install when the clamping structure because of inclination too big influence clamping structure's removal.
Preferably, as an improvement, a slotted hole is formed in the side wall of the limiting ring along the axial direction of the limiting ring, the slotted hole is in a strip-shaped hole shape, a bolt hole is formed in the side wall of the connecting plate of the spring seat, and the bolt hole and the slotted hole are arranged in a superposition mode.
The slotted hole is the bar poroid among this technical scheme, can change the distance between spacing ring and the chuck seat through vertical removal spacing ring like this to play the inclination of adjusting the chuck seat, and then reach the inclination's of adjusting the disk seat purpose.
Preferably, as an improvement, a pressure sensor is arranged on the clamping mechanism base, and the top end of the pressure sensor can abut against the spring seat.
Pressure sensor installs on fixture base among this technical scheme, can detect the pressure value that the disk seat applyed to the ball core, is convenient for control valve seat's removal.
Preferably, as an improvement, the transmission shaft is rotatably connected with the spring seat through a bearing, a bearing cover is coaxially arranged on the transmission shaft, and the bearing cover is fixedly connected with the spring seat.
The bearing cover of the technical scheme can play a role in positioning the bearing and can prevent quick-wear parts such as a rolling body retainer on the bearing from being damaged under the action of external force.
Preferably, as an improvement, a shaft circlip is coaxially connected to the transmission shaft, and the shaft circlip is located at the top end of the bearing.
The circlip for the shaft in the technical scheme can achieve the effect of axial positioning on the transmission shaft.
Preferably, as an improvement, the grinding tool is a self-centering chuck.
The self-centering chuck in the technical scheme has the function of automatic centering, and has a better positioning and clamping effect on the valve seat.
Drawings
Fig. 1 is a longitudinal sectional view of a first embodiment of the flexible clamping structure for grinding a valve seat according to the present invention.
Fig. 2 is a longitudinal sectional view of the second embodiment of the flexible clamping structure for grinding a valve seat according to the present invention.
Fig. 3 is a longitudinal sectional view of the third embodiment of the flexible clamping structure for grinding a valve seat according to the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the self-centering clamping mechanism comprises a valve seat 1, a self-centering chuck 2, a chuck seat 3, a limiting ring 4, a slotted hole 401, a universal coupling 5, a spring seat 6, a bearing cover 7, an elastic baffle ring 8 for a shaft, a bearing 9, a spring 10, a clamping mechanism base 11, a transmission shaft 21, a pin shaft I30, a pin shaft II31 and a pressure sensor 17.
Example one
The embodiment is basically as shown in the attached figure 1: flexible clamping structure is ground to disk seat, including chuck seat 3, grinding frock and transmission shaft 21, grind the frock and adopt among the prior art from centering chuck 2 among the this embodiment, pass through bolt fixed connection from centering chuck 2 and chuck seat 3, from centering chuck 2 and being used for clamping fixed disk seat 1. Be connected with universal joint 5 between transmission shaft 21 and the chuck seat 3, transmission shaft 21 and universal joint 5 are connected through round pin axle I30 in this embodiment, and chuck seat 3 and universal joint 5 are connected through round pin axle II 31. The universal coupling 5 in this embodiment is a single ball-and-socket joint type universal coupling.
In this embodiment, the transmission shaft 21 is coaxially and rotatably connected with the clamping mechanism base 11, the spring 10 is arranged between the clamping mechanism base 11 and the chuck base 3, the spring seat 6 is arranged between the chuck base 3 and the clamping mechanism base 11 in this embodiment, the spring seat 6 is rotatably connected with the transmission shaft 21, and two ends of the spring 10 are respectively connected with the spring seat 6 and the clamping mechanism base 11. Specifically, the method comprises the following steps: spring holder 6 passes through bearing 9 with transmission shaft 21 in this embodiment and rotates to be connected, and the coaxial bearing cap 7 that sets up on transmission shaft 21, bearing cap 7 be located the top of bearing 9 and pass through bolt fixed connection with spring holder 6, in this embodiment on transmission shaft 21 coaxial coupling have for the axle circlip 8, 8 cards of circlip for the axle are in the outside of transmission shaft 21 and are located the bearing 9 top, 8 can play axial positioning's effect to transmission shaft 21 for the axle circlip 8.
In this embodiment, the spring seat 6 includes a guide sleeve 602 and a connecting plate 601 coaxially disposed, the guide sleeve 602 and the connecting plate 601 are integrally formed, the guide sleeve 602 is in a circular cylindrical structure, the connecting plate 601 is in a circular plate-shaped structure, a through hole communicated with the guide sleeve 602 is coaxially formed in the connecting plate 601, the outer diameter of the connecting plate 601 is larger than that of the guide sleeve 602, and two ends of the spring 10 are respectively connected with the clamping mechanism base 11 and the guide sleeve 602. The guide sleeve 602 in this embodiment can guide the compression movement of the spring 10, so that the spring 10 is more stable when being compressed and reset.
According to the embodiment, the limiting ring 4 is fixedly connected to the connecting plate 601 of the spring seat 6 through a bolt, the limiting ring 4 is of a circular annular structure, an interval is reserved between the limiting ring 4 and the chuck seat 3, the purpose of setting the limiting ring 4 is to limit the inclination angle of the universal coupling 5, and the phenomenon that the clamping mechanism is influenced by the overlarge inclination angle when the self-centering chuck 2 arranged on the clamping mechanism is installed on the valve seat 1 is avoided. The specific implementation process is as follows: in the embodiment, the torque can be transmitted to the universal coupling 5 through the transmission shaft 21, the universal coupling 5 then transmits the torque to the valve seat 1, so that the valve seat 1 can rotate to grind the ball core, in the embodiment, the universal coupling 5 is respectively connected with the chuck seat 3 and the transmission shaft 21, so that the whole clamping device forms a flexible connection relationship, namely, when the universal coupling 5 deflects, the valve seat 1 can generate a deflection angle in the process of contacting with the ball core, so that the valve seat 1 can swing, so that the valve seat 1 can be smoothly attached to the end surface of the ball core, abrasion caused by rigid contact of the valve seat 1 and the ball core is avoided, in addition, in the embodiment, due to the arrangement of the limit ring 4, the inclination angle of the universal coupling 5 can be limited, when the chuck seat 3 swings, the limit ring 4 can limit the swing amplitude of the chuck seat 3, and the limit ring 4 can play a role of blocking the chuck seat 3, thereby avoiding the valve seat 1 from influencing the movement of the whole clamping structure due to overlarge inclination angle after being arranged on the self-centering chuck 2.
Example two
As shown in fig. 2, the valve seat grinding flexible clamping structure is different from the first embodiment in that: slotted holes 401 are formed in the left side wall and the right side wall of the limiting ring 4 along the axial direction of the limiting ring, the slotted holes 401 are all in a strip hole shape, bolt holes are formed in the side wall of the connecting plate 601 of the spring seat 6, and the bolt holes and the slotted holes 401 are arranged in a coincident mode.
In this embodiment, the slot 401 is in a shape of a strip hole, so that the slot 401 can move vertically, the bolt holes on the connecting plate 601 of the slot 401 and the spring seat 6 can be overlapped after the distance between the limit ring 4 and the chuck seat 3 is changed, and the connection between the limit ring 4 and the spring seat 6 can be realized after the position of the limit ring 4 is changed.
In this embodiment, the position of the slot 401 on the limit ring 4 is changed, so as to adjust the distance between the limit ring 4 and the chuck base 3, and further adjust the inclination angle of the chuck base 3, thereby achieving the purpose of adjusting the inclination angle of the valve seat 1. The greater the distance between the retainer ring 4 and the chuck base 3, the greater the angle at which the valve seat 1 can be tilted.
EXAMPLE III
As shown in fig. 3, the valve seat grinding flexible clamping structure is different from the first embodiment in that: be equipped with pressure sensor 17 on the fixture base 11, pressure sensor 17's top can offset with spring holder 6, and is specific: pressure sensor 17 passes through bolt and fixture base 11 fixed connection in this embodiment, and spring 10 is under natural state, there is the interval between pressure sensor 17 top and the top of spring holder 6, after spring 10 receives the compression, pressure sensor 17's top can offset with spring holder 6's connecting plate 601, pressure sensor 17 electricity is connected with the numerical control display screen, in the in-process that removes valve seat 1 and the laminating of ball core mutually, the ball core will produce the extrusion force to valve seat 1, make valve seat 1 remove to the direction of keeping away from the ball core, and make pressure sensor 17 top and the contact of spring holder 6 top, then transmit the pressure value to the numerical control display screen again, make the pressure value that pressure sensor 17 shows reach required pressure through removing valve seat 1 and can stop moving valve seat 1, thereby accomplish the laminating between valve seat 1 and the ball core.
The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. Flexible clamping structure is ground to disk seat, its characterized in that: the grinding tool is fixedly connected with the chuck base, and a universal coupling is connected between the transmission shaft and the chuck base.
2. The valve seat grinding flexible clamping structure of claim 1, wherein: the clamping mechanism base is coaxially and rotatably connected to the transmission shaft, and a spring is arranged between the clamping mechanism base and the chuck base.
3. The valve seat grinding flexible clamping structure of claim 2, wherein: a spring seat is arranged between the chuck seat and the clamping mechanism base and is rotatably connected with the transmission shaft, and two ends of the spring are respectively connected with the spring seat and the clamping mechanism base.
4. The valve seat grinding flexible clamping structure of claim 3, wherein: the spring holder includes uide bushing and the connecting plate of coaxial setting, the external diameter of connecting plate is greater than the external diameter of uide bushing, the both ends of spring are connected with the uide bushing and the fixture base of spring holder respectively.
5. The valve seat grinding flexible clamping structure of claim 4, wherein: and the connecting plate of the spring seat is coaxially connected with a limiting ring.
6. The valve seat grinding flexible clamping structure of claim 5, wherein: the side wall of the limiting ring is provided with a slotted hole along the axial direction, the slotted hole is in a strip hole shape, the side wall of the connecting plate of the spring seat is provided with a bolt hole, and the bolt hole and the slotted hole are arranged in a superposition mode.
7. The valve seat grinding flexible clamping structure of claim 3, wherein: and a pressure sensor is arranged on the clamping mechanism base, and the top end of the pressure sensor can be abutted against the spring seat.
8. The valve seat grinding flexible clamping structure of claim 3, wherein: the transmission shaft is rotatably connected with the spring seat through a bearing, a bearing cover is coaxially arranged on the transmission shaft, and the bearing cover is fixedly connected with the spring seat.
9. The valve seat grinding flexible clamping structure of claim 8, wherein: the transmission shaft is coaxially connected with a shaft elastic check ring, and the shaft elastic check ring is positioned at the top end of the bearing.
10. The valve seat grinding flexible clamping structure of claim 1, wherein: the grinding tool is a self-centering chuck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022454923.8U CN213616068U (en) | 2020-10-28 | 2020-10-28 | Flexible clamping structure for grinding valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022454923.8U CN213616068U (en) | 2020-10-28 | 2020-10-28 | Flexible clamping structure for grinding valve seat |
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| Publication Number | Publication Date |
|---|---|
| CN213616068U true CN213616068U (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022454923.8U Active CN213616068U (en) | 2020-10-28 | 2020-10-28 | Flexible clamping structure for grinding valve seat |
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| Country | Link |
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| CN (1) | CN213616068U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649611A (en) * | 2021-09-08 | 2021-11-16 | 张国文 | Free floating chuck |
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2020
- 2020-10-28 CN CN202022454923.8U patent/CN213616068U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649611A (en) * | 2021-09-08 | 2021-11-16 | 张国文 | Free floating chuck |
| CN113649611B (en) * | 2021-09-08 | 2024-04-16 | 张国文 | Free floating chuck |
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